Falling from height accident analysis and prevention seat belt

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, The construction industry falling from height cause of the accident and management status
    Construction industry constantly changing work environment, heavy physical labor, at any time and a variety of unfavorable factors, directly threaten the personal safety of the construction site operator falls accident construction accident injury type four hurt the first injury, has been plagued by production safety of the construction industry.
    Falls accident: the most important thing is reserved for the hole and limb, scaffolding, Cha board and tower crane and construction machinery, etc. Despite the construction business units from the security management, regulatory and other aspects of increased prevention efforts and measures. but the fall of the hidden dangers of the accident, has not been completely eradicated.
    Before work at heights without adequate safety precautions and safety education, to ignore the safety of the work at heights Note, Jiaodi, etc., careless, luck, time to fight, grab the progress blind adventure, barbaric construction, etc., are one of the causes of the accident led to falling from height.
Two, falls accident-prone, time and reason
1, 9:00 ~ 11:00 13:00 ~ 16:00 10:00 ~ 11:00, the accident most of the time, mainly due to every day from 10:30 to 11:00, 19:00 to 9:00, morning 3:00 to 4:00 shift change when workers call it a day before, security thought to relax their vigilance.
Before and after the holidays, in order to celebrate the holidays, ideologically dispersed with other matters, to the neglect of the safety in production, especially May Day \"May Day\", \"11\" National Day, New Year\\ s Day, Spring Festival and other many workers during the holidays to return home and back to the site, negligence, relaxed sense of security vigilance.
Many of the perpetrators, the cause of the accident is unpleasant, and the preparatory work before the end of the family, such as: family rooms and other important things, the body dry site work, can not concentrate thinking of doing a good job engineering quality and safety at work.
Victims of falls, the vast majority of young people, aged between 22 to 26 years old, because young people lack knowledge of site security, relied on their own strength, knowledge and experience of the security people, they remind and stop only when it is fallen on deaf ears and not listen to people\\ s advice, days fearless, reckless adventure of the phenomenon more.
5, lots of falls and the environment, most reserve hole, balcony, elevator shafts, stairs and other buildings of the limb and vertical transportation machinery, equipment installation, demolition, repair, maintenance, four hazardous locations.
6, in the high places of the \"four\" \"five-limb\" job before and during the operation, illegal command, illegal operations, adventure blindly reckless construction, With Rao fortunate psychology, which all contribute to an important cause of the accident .
How to prevent to prevent falls and other accidents occur
1, departments and units at all levels and tirelessly for the prevention of falls accidents, inspection, supervision, and to develop a detailed work at heights regulations, and the timely implementation into practice, especially prone to falling from height accidents location, environment, personnel, time and operating altitude, take positive and effective preventive measures, including measures to set the anti-falling, the use of safety devices and safety education.
2, the project construction site to develop active and effective safety measures, including the development of security technologies and inspection work at heights, strengthening at all levels, various departments and management staff, the management of the operating safety of the workers, the ongoing safety education activities to improve the awareness of security.
3, in the construction safety technology for high-fall accident law, to strengthen the hole limb, machinery, scaffolding, protective equipment, safety devices such as the acceptance of other facilities, check to do the meticulous to ensure safety.

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What are the unique roles of planetary gear reducer

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planetary gear reducer – China Manufacturer
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         The compact structure of the planetary gear reducer, the transmission effect is relatively large. The spiral lift is characterized by it under certain conditions, self-locking function of the transmission machinery is the most commonly used to slow down the machine one of the planetary gear reducer main cylindrical worm reducer, arc transfer surface worm reducer cone worm reducer and worm – gear reducer. Planetary gear reducer instance, which is most commonly used cylindrical worm reducer. Two kinds of ordinary cylindrical worm and Circular Cylinder Worm. When the popular talk about self-locking worm is as input to drive the worm gear and worm wheel as input but can not drive the worm rotation Worm-round lead angle (ie: the helix angle) is less than or equal to the equivalent friction angle (of γ ≤ ρ), self-locking can be achieved (ie, only the worm to take the initiative, drive worm, not vice versa). Helix angle γ <3 ° 17 \\ self-locking capability, like to be locked to the same reason of the nature of the worm angle is less than the friction angle in heavy lifting equipment is very important because in this way drive failure, the cargo will not fall.
     Planetary gear reducer in use with the role of other reducer What is the difference? Planetary gear reducer is to change the power machine output speed (deceleration, the growth rate or variable speed), change the output torque of power machine, needs and requirements for the work of agencies; changes in the forms of exercise of the power machine output required for the work agencies forms of exercise [such as change the rotary motion to linear motion or vice versa). A power machine of machinery can be transmitted to several agencies, or a number of the power machine of mechanical energy transfer to a working body. Other special role, if conducive to machine assembly, installation, maintenance and safety of mechanical reducer device. Good planetary gear reducer do reducer Manufacturing Co., Ltd..

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air source heat pump water heater maintenance:

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An air source heat pump water heater higher degree of automation equipment, when used on a regular basis unit status check, if the unit effective long-term care and maintenance of operational reliability and service life of the unit will get an unexpected increase.
Installed air source heat pump water heater machine waterway filter should be cleaned regularly to ensure water quality within the system to avoid host damage caused by the unit due to filter fouling.
Air source heat pump water heater users in the use and maintenance of heat pump units should note: all the safety protection device in the unit at the factory setting is completed, do not disassemble or adjust.
4 air source heat pump water heaters often to check the wiring of the unit\\ s power and electrical systems is a solid, electrical components movement abnormalities, if any should be timely maintenance and replacement.
Various parts of the air source heat pump water heaters often to check unit, check the machine, pipe fittings and inflation valves for oil, to ensure that the unit refrigerant leak
When the actual water temperature with the unit control panel display value is inconsistent with air source heat pump water heater is a very loving, the detection of temperature sensing device is a good contact
Air source heat pump water heater unit fails, the user can not be solved, repair to the service department reported, and inform the fault code to send people to the maintenance
Air source heat pump water heater host condenser cleaning, we recommend every two years to 50 ℃ -60 ℃, the concentration of 15% of hot phosphoric acid to clean the condenser, start the host comes with a circulating pump cleaning 3 hours, and finally washed with tap water times. Take over to prepare for cleaning. Prohibit the use of corrosive cleaning fluid to clean the condenser.
Air source heat pump water heater tank needs a period of time (usually three months, depending on local water quality may be) required to clean scale.

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air source water heater development prospects

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solar indoor lights – China Manufacturer
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(1) Energy efficient: air source water heater through a lot to obtain the free heat in the air, the consumption of electricity is just the compressor used to move the energy used by air energy, the thermal efficiency of up to 380% -600%, manufacturing the same amount of hot water. the cost of the use of air source water heater electric water heater 1/4, 1/3 of the gas water heater, solar water heater 1/2. Thermally efficient air source water heater features and advantages of the problems in the world on energy issues, which is the air source water heater become the fourth generation of water heaters, \"one of the most important magic weapon.
(2) green, safe and reliable: the unique use of principles of air source water heater, in the course of their work a thorough separation of water from the root to prevent leakage accident; and without any fuel in the course of the pipeline, there is no fuel leak cause the risk of fire, explosion, poisoning, etc.; the same time, the air source water heater in the course of their work without any toxic gases, greenhouse gases and acid rain gas emissions, there is no fee thermal pollution. These also become air source to the rapid development of bedding wide road.
(3) all-weather easy to use: air source water heater due to the relatively small size, can be installed in the bathroom, balcony and external walls, etc., use unlimited; and air source water heater controlled by a microcomputer to run automatically, no special duty to ensure that all-weather hot water supply, combined with the timer switch to achieve low power consumption to achieve more economical use.

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notable feature

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1, security: the use of air to water heating, water and electricity is completely separated and set up multiple protection does not exist any hidden dangers.
2, energy: a small amount of electrical energy will heat the air handling to water, water heating, energy consumption is 1/5 of the electric water heater; 1/6 of the gas water heater; fuel water heater 1/4; solar 2/3; low power and can take advantage of more energy-saving effect.
Environmental protection: approved by the National Energy Conservation Association "green energy-saving products, do not pollute the environment, low noise operation. United States, "Copeland" the most advanced control system plus the company s user-friendly design, has a memory function, automatic recovery after power failure, temperature control operation can also control time, plug it in, and all do not you worry, you can produce a steady stream of hot water.
Automatic cleaning: air to air heat pump unique automatic cleaning, ensure that air can heat pump water tank cleaning, maintaining the thermal efficiency and prolong life.
Not subject to environmental impact: a round-the-clock hot water supply system, regardless of the cloudy, rainy, spring, summer, autumn and winter, day and night, as long as there is air there is hot water, will be able to -10 ° C ~ 30 ° C low-temperature heat , the role of air to air heat pump units, the temperature around 60 ℃ hot water.
6, long service life: air heat pump with advanced scroll compressor and double-slotted hydrophilic aluminum radiator, effectively prevent the corrosion of acid rain on the host.
Multiple functions: air source air heat pump to both the multiple functions of the hot water, air conditioning, heating, so the typical energy-saving hot water, refrigeration equipment.

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solar hot water system classification

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solar indoor lights – China Manufacturer
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International standard ISO9459 〖15〗 solar hot water system of scientific classification, to be classified in accordance with the seven characteristics of the solar water heating systems, which each feature is divided into 2-3 types, which constitute a rigorous solar hot water system classification system, such as the table below.
Table of solar hot water system classification, translated from the international standard ISO9459 〖15〗

Feature type
? A B C
A separate solar system solar preheating system solar energy with an auxiliary energy system
Direct Introduction System?
Open system, open system to closed system
4 full of the system backflow drainage system
5 natural circulation system forced circulation system?
6 circulatory system, DC system?
7 split system compact system as a whole system
1 1 feature representation of the system of solar and other energy
1.1 alone solar system — without any auxiliary energy, solar water heating systems;
1.2 solar preheat systems — before any other type of heater in the water, the water warm-up solar hot water systems;
1.3 solar with auxiliary energy systems — used in conjunction with solar and auxiliary energy, solar hot water system can not rely on solar energy and provide the necessary heat;
Characteristics of said collector heat transfer working fluid is hot water for user consumption.
2.1 Direct system – the final user consumption or recycling stream to the hot water flows through the collector system, also known as round robin system or single-loop system;
2.2 The indirect system — heat transfer working fluid is not the final user consumption or circulation flow to the users of water but the heat transfer working fluid flows through the collector system, also known as dual-loop system or double-loop system.
Feature representation of the system heat transfer working fluid contact with the atmosphere.
3.1 The open system — heat transfer working fluid and the atmosphere system of a large area of ??contact, the contact surface in the open surface heat storage devices;
3.2 The open system — heat transfer working fluid contact with the atmosphere is limited to the free surface of the supply tank and expansion tank or exhaust pipe outlet system;
3.3 closed system — heat transfer working fluid and the atmosphere is completely isolated system.
4 4 characteristics of said heat transfer working fluid in the collector\\ s status
4.1 is full of systems — always full system of the heat transfer working fluid in the collector;
4.2 reflux systems — as part of the normal work cycle, the heat transfer working fluid in the pump stops running from the collector into the heat storage devices, while the inflow of the pump to re-open Shiyou collector system;
4.3 drainage system – in order to antifreeze purpose, the water can be discharged from the collector no longer use the system.

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common knowledge quiz

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solar collectors – China Manufacturer
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An air source heat pump water heater is a device?
The device is a new production of hot water equipment, absorb heat from the air to heat water to a maximum of 55 ℃. As a central water heating equipment is widely used in guesthouses, hotels, sauna centers, hospitals, factories and residential quarters collective type with hot water, heating units and villas, family, beauty salons and other small, with hot water, heating units.
2, the air temperature is so low it how can the water heated to 55 ° C?
Usually we think that the heat is always from high-temperature heat source to the low temperature heat source, while the air temperature below 45 ℃, especially cold winter if you use air direct heating of water is impossible. Air heat pump water heaters are equipped with compressors, acting through the input of electrical energy, the compressor can draw the process of low temperature heat in the air and converted into high temperature heat, and the use of high temperature heat to heat water to 55-60 ° C.
3, air source heat pump water heater works What is it?
Air source heat pump water heater heat pump – heat exchanger – choke – endothermic – heat pumps and other devices to form a circulatory system. HTM (can also be called a refrigerant) in the role of a heat pump in the circular flow within the system. Completed the gaseous boost heating process in the heat pump (temperature up to 100 ° C), the release of high temperature heat to heat water after it enters the heat exchanger is cooled and transformed for the flow of liquid when it runs into the heat sink, The liquid absorbs heat rapidly evaporation once again transformed into the gaseous state at the same time the temperature dropped to minus 20 ° C – 30 ° C when the air around the heat sink will be a steady stream of low temperature heat is passed to the heat medium. The heat medium cycle to achieve the heating of the air in the low temperature heat into high temperature heat and the cold water process.
4, air source heat pump water heater needs electricity, running costs will not be very high?
Air source heat pump water heater is different from the electric water heater, electric water heater is electric heating tube directly to electrical energy is converted into heat to heat the cold water, electric conversion efficiency of about 95 ℅. But the electrical energy consumed by the air heat pump water heater is driven heat pump work, and only serve to promote the movement of heat medium circulation due to a lot of heat into the air in the system so that the hot water to get the energy is far greater than the heat pump energy consumption, these two energy ratio can reach more than four times the electric conversion rate of more than 400 ℅. In other words: the main energy of the air heat pump water heater heating water from the surrounding air, use the equivalent of 1/4 or 1/5 of the electricity consumed by the electric water heater you can get enough hot water, running cost is obviously much lower than the electric water heater or electric boiler. However, such equipment running in the low temperature (below minus 10 degrees), efficiency is compromised, the actual efficiency of 80% of the electric water heater. Therefore, the cold regions should be used with little attention.

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solar water heating systems use purpose

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1, the environmental benefits – as opposed to the use of fossil fuels to manufacture hot water can reduce environmental pollution and greenhouse gases – carbon dioxide generation.
2, to save energy – solar energy belongs to everyone, as long as there is space and equipment, anyone can use it for free.
3, safety – not using gas to the risk of explosion or poisoning, or fuel oil boiler explosion concerns, or use of electricity will be the possibility of leakage.
4, no space – no hand operation, automatic operation. In addition, solar energy water heater installed on the roof, will not take up any interior space.
5, cost-effective – the normal solar water heater is difficult to damage, the life of at least a decade or more, or even to twenty years, because the basic heat source for the free solar energy, so use it very much in line with the economic costs and benefits.

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solar water heating system components

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evacuated tubes – China Manufacturer
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solar collectors
Collector components in the system, its function is equivalent to the water heater in the electric heating tubes. And electric water heaters, gas water heaters, solar collectors use the sun\\ s radiant heat, therefore the heating time can only be a day of sun exposure, so is sometimes necessary auxiliary heating, such as boilers, electric heating.
Tank insulation
And electric water heater tank insulation, hot water storage containers. Solar water heater can only work during the day, and people generally in the evening only use hot water, it must be the output of the collector during the day, hot water storage tank insulation. The volume is the sum of every night with hot water. Enamel interior, pressurized water tank insulation, effective insulation, corrosion resistance, water quality, the useful life of over 20 years.
Connecting pipe
Transported to the hot water from the collector tank insulation, cold water from the tank insulation transported to the collector channels, so that the entire system to form a closed loop. Rational design, circulating pipes are properly connected solar systems can reach the best working condition is essential. The hot water pipes, thermal insulation must be done. The pipe must have a high quality, guaranteed service life of more than 20 years.
Control Center
The difference between solar hot water system and solar water heaters is the control center. As a system, the control center is responsible for monitoring, operation, regulation, and function of the whole system, now the technology has been through the normal operation of the Internet remote control system. Solar water heater system components
Solar water heating system control center computer software and transformer box, the circulating pump.
Edit this paragraph
Heat exchanger

The all-welded plate-shell heat exchanger draws detachable plate heat exchanger and efficient, compact advantages make up a shell and tube heat exchanger efficiency is low, a large area of ??shortcomings. Shell heat exchanger heat transfer plate wavy oval, relative to the circular plate to increase the heat, greatly increasing the heat transfer performance. Widely used in high temperature, high pressure conditions of heat transfer conditions.

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other classification methods

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(1) solar collector type classification
Flat panel solar hot water systems — using flat-plate collector, solar water heating systems;
Vacuum tube solar water heating system — using vacuum tube collectors, solar water heating systems;
U-tube solar hot water systems — U-tube collector, solar water heating systems;
Heat pipe solar water heating system — heat pipe collector, solar water heating systems.
Ceramic solar water heating systems — ceramic solar collectors, solar water heating systems.
(2) the volume of the tank classification
According to user demand for hot water supply to determine the capacity of the tank. In accordance with the volume of the tank, the system can be divided into:
Domestic solar water heating system — the tank volume is less than 0.6m solar hot water systems, often also referred to as domestic solar water heaters;
Common solar water heating system — the tank volume greater than equal to 0.6 m solar water heating systems, often also known as solar water heating systems.

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