Discussion on the problem of setting up pump adapter

For the installation problems found during the engineering acceptance of the water pump adapter, a solution was proposed based on the setting rules and the role analysis of the pump adapter.

Keywords: pump adapter; problems; exploration

1, the role of the pump adapter and set the provisions

1.1 The water pump adapter is one of the components of the building firefighting facilities. It is an auxiliary equipment for the fire extinguishing of fire engines, motor pumps and other buildings. Its role is in the fire situation, when the indoor fire pump fails or the indoor fire water is insufficient, the fire truck takes water from the outdoor fire hydrant, pressurizes and sends the water to the indoor fire pipe network through the water pump adapter, and supplies the fire extinguishing facility for use. Meet the demand for fire extinguishing water consumption.

1.2 pump adapter settings

1.2.1 "Building Design Fire Protection Code" GB50016-2006 Article 8.4.2.5: High-rise factory buildings (warehouses), factory buildings (warehouses) with indoor fire hydrant and more than four floors, public buildings with indoor fire hydrant and more than five floors The indoor fire hydrant water supply system should be equipped with a fire pump adapter. The fire pump adapter should be set at an outdoor location where the fire engine can be used. The distance from the outdoor fire hydrant or fire pool intake should be 15 to 40 meters. The number of fire pump adapters should be determined based on the amount of fire water in the room. The flow rate of each fire pump adapter should be calculated at 10-15 L/s.

1.2.2 "High-rise Civil Building Design Fire Protection Code" GB50045-95 (2005 edition) Article 7.4.5: Indoor fire hydrant water supply system and automatic sprinkler system should be set pump adapter, and should meet the following requirements: Water pump adapter The quantity shall be calculated and determined according to the indoor fire-fighting water consumption. The flow rate of each pump adapter shall be calculated as 10-15 L/s. When the fire-fighting water supply is the vertical partitioned water supply, the partitions within the fire-fighting truck water supply pressure range shall be set separately. Adapters; pump adapters should be located outdoors to facilitate the use of fire engines, the distance from the outdoor fire hydrant or fire pool should be 15 ~ 40m; pump adapter should adopt the ground type; when the underground pump adapter, there should be Obvious sign.

2. The situation that the water pump adaptor is set in the actual project and analyzes the existing problems

2.1 The situation where the pump adapter is set in the actual project

The author found that in the actual project acceptance, the pump adapter was centralized, especially when there was a large amount of fire water in the room. When multiple or multiple sets of pump adapters were required, several or even five to six were set together, and 15 There is only one outdoor fire hydrant in the ~40m range. Check the original design drawings and meet the design requirements. The specification has no specific requirements for the location of the pump adapter, and there is no one-to-one correspondence between the outdoor fire hydrant and the pump adapter. It is only a general rule: "The pump adapter should be located outdoors where the fire engine can be used. The distance from the outdoor fire hydrant or fire pool should be 15 to 40 meters."

2.2 The analysis of the centralized setting problem of the pump adapter. To extinguish a building fire, we must adhere to the principle of “saving people first” and eliminate the fire in accordance with the tactical requirements of “solid-fixed and solid-moving”. In special circumstances, fire trucks take water from outdoor fire hydrants, send them to the indoor fire pipe network through the water pump adapter after pressurization, and provide fire extinguishing facilities to meet the demand for fire extinguishing water. This is an important part of the fire extinguishing team's fire extinguishing plan. It is also a need for actual combat. The author consulted with the comrades who had engaged in first-line fire extinguishing and commanding experience and discussed with them that there were many shortcomings in the centralized setting of pump adapters:

2.2.1 The centralized setting of the pump adapter is not convenient for fire engines. Because one pump adapter can only be supplied by one fire truck, multiple pump adapters need to be set up to use multiple fire engines, resulting in the inability of the fire engine to stop and the use of fire engines.

2.2.2 The centralized setting of the pump adapter does not guarantee effective pressurized water supply. The flow rate of each pump adapter is calculated as 10~15L/s, and the water consumption of each outdoor fire hydrant is also calculated as 10~15L/s. There is only one outdoor fire hydrant in the range of 15~40m around, and only one pump joint can be guaranteed. The utility model has effective water supply, and other pump adapters are difficult to play a role, and can not ensure the effective pressurized water supply to the indoor pipe network. That is, no effective water supply is available.

2.2.4 The centralized installation of pump adapters on the fire fighting site of high-rise buildings will seriously affect the deployment of fire fighting. High-rise building fires are complicated. If the climbers, high-sprayers, and ladder trucks are parked at the centralized position of the pump adapter according to actual combat needs, the fire engines that need to supply water to the indoor pipe network cannot stop. Especially in the high-rise buildings only the 1/4 long side (with no height greater than 5m, deeper than 4m in the podium, and there are stairs through the outdoor or through the exit of the stairwell) centralized installation of the pump adapter, will seriously affect the start of the fire fighting And fire command.

2.2.5 The problem of poor maintenance of the pump adapter is more common and it is difficult to achieve its effectiveness in the event of a fire. In this case, fire squadrons often occur during the test of building fire facilities, and the water pump adaptor cannot normally supply water to the room. The main reasons are: the owners of the pump adapter is not clear, will not maintain, daily inspections, inspections ignore the inspection of the pump adapter; pump adapter test is completed by the fire engine, testing units, the owner unit Never perform functional tests, that is, the water pump adapter is only tested during fire inspection and fire brigade testing of building fire facilities. At other times, the pump adapter has not been used and tested. It is difficult to find out whether its function is normal. Only a fire can test its effectiveness.

3 Countermeasure for setting of pump adapter

3.1 National regulations The specific requirements for the location of the pump adapter must be specified and cannot be specified in general terms.

3.1.1 clearly defines the one-to-one correspondence between the pump adapter and the outdoor fire hydrant. An outdoor fire hydrant must be installed within 15 to 40m of each pump adapter to ensure effective water supply.

3.1.2 Clearly stipulates that the pump adapter cannot be set up in a centralized manner. It should be evenly distributed beside the fire lane and there should be a site where the fire engine is parked. This does not affect the passage of other fire engines. When a fire is actually deployed, when a fire truck uses a pump adapter near a 4m wide fire lane, other fire engines should be allowed to pass.

3.1.3 It should be clearly stated that only one or a group of pump adapters (one adapter in each of the high zone and the bottom zone) can be installed on the site of the ascending surface of a high-rise building. This can effectively prevent fire engines from stopping and supplying water in actual combat situations. problem.

3.2 strict review. At the stage of construction project auditing and filing, it is required that the pump adapter cannot be set centrally, eliminating the problem of unreasonable setting of the pump adapter from the source. The setting of the pump adapter shall be considered in conjunction with the fire lane and the outdoor fire hydrant. When necessary, the opinions of fire extinguishers and war experts shall be sought. For complex projects, you can imagine various situations on the drawings, and think about it again, and set the pump adapter to the best position.

3.3 Acceptance, we must attach great importance to whether the pump adapter setting is reasonable, participate in the acceptance training, squadron cadres, on the scene according to the hypothetical fire-fighting plan, the implementation of various conditions of the fire truck to the indoor water supply, if the actual can not ensure the fire truck Docking and effective water supply, put forward rationalization opinions, require the construction unit to carry out rectification.

3.4 Strengthen maintenance to ensure complete and easy use. The owner must regularly maintain the pump adapter, check whether the opening of the valve is flexible, and whether there is any leakage at each joint, if it is abnormal, it shall be timely adjusted and repaired; timely replacement of the aging or damaged gasket; screw, nut and each The rotating parts should be lubricated regularly to prevent rust and ensure normal operation. The check valve and rubber plate should be replaced regularly. The wrench can be used to remove the fixed interface, and then a special wrench can be used to remove the unclamping, exchange, and then install the main body. Sealing test, hydrostatic test should use 1.6Mp, no leakage for 2min before use. Routine patrols and fire inspections depend on the appearance and labeling of the pump adapter, and the open state of the pipe network control valve to ensure its integrity and ease of use.

3.5 Annually and before the acceptance inspection of the building's firefighting facilities, the water pump adapter test shall be added as a mandatory inspection, and a report shall be issued on whether the pump adapter function is in good condition and whether it is in good condition or not, and exert its maximum effectiveness.