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CN-121977766-A - Micro-pressure test method for indoor gravity drainage system of building

CN121977766ACN 121977766 ACN121977766 ACN 121977766ACN-121977766-A

Abstract

The invention discloses a micro-pressure test method of an indoor gravity drainage system of a building, which comprises the steps of plugging reserved water outlets of all layers of the indoor gravity drainage system and water outlets at the lower end of the indoor gravity drainage system, adding indication water into the system through a top-extending vent pipe at the uppermost end of a vertical pipe, filling the water into the system through the top-extending vent pipe until the liquid level does not drop, plugging the top-extending vent pipe at the upper end of the vertical pipe, connecting a pressure testing pump to the plug, filling water into the gravity drainage system by the pressure testing pump for pressurizing, finding out water leakage points along a pipeline if the pressure drops after the pressure is maintained for a period of time, judging that the drainage system is not leaked if the pressure does not drop, removing the plug of the water outlets at the tail end of the system, and discharging water stored in the system. The invention can check and accept an independent indoor gravity drainage system by only performing one-time irrigation test, saves time and labor cost, has wider application range, can test single-riser, double-riser and three-riser drainage systems by the method, and can detect any interface in the drainage systems.

Inventors

  • LIU HUISHENG
  • TAN WENSHENG
  • GU LINDAN

Assignees

  • 临海伟星新型建材有限公司

Dates

Publication Date
20260505
Application Date
20260407

Claims (8)

  1. 1. The micro-pressure test method for the indoor gravity drainage system of the building is characterized by comprising the following steps of: step one, plugging a water outlet (3) reserved in each layer of an indoor gravity drainage system and a water outlet (4) at the lower end of the indoor gravity drainage system, and keeping a top-extending vent pipe (5) at the uppermost end of a vertical pipe (1) open; Step two, adding indicating water into the gravity drainage system through a top extending vent pipe (5); thirdly, filling tap water into a gravity drainage system through a top-extending vent pipe (5), and after the water surface falls for 10min-20min after water is filled, observing for 3min-10 min after water is filled, wherein the liquid surface does not fall; plugging the top-extending vent pipe (5), then connecting the pressure testing pump (10) to the plug, injecting water into the gravity drainage system by the pressure testing pump (10) to press, and maintaining the pressure for a period of time; And fifthly, removing the plug on the top-extending vent pipe (5) and installing the ventilation cap (12), and removing the plug of the discharge port (4) at the lower end of the indoor gravity drainage system and discharging the water stored in the gravity drainage system.
  2. 2. The micro-pressure test method for the indoor gravity drainage system of the building according to claim 1, wherein the pipeline of the indoor gravity drainage system of the building is a U-PVC pipe, a water outlet (3) reserved in each layer of the indoor gravity drainage system and a water outlet (4) at the lower end of the indoor gravity drainage system are plugged through a plugging cap (8), and the plugging cap (8) is connected with the water outlet (3) through glue.
  3. 3. The micro-pressure test method for the indoor gravity drainage system of the building according to claim 1, wherein the pipeline of the indoor gravity drainage system is an HDPE pipe, and the water outlet (3) and the water outlet (4) are plugged by adopting welding caps.
  4. 4. The micro-pressure test method of the indoor gravity drainage system of the building according to claim 1, wherein the indication water in the second step is yellow indication water, and the yellow indication water accounts for more than 10% of the whole water filling amount.
  5. 5. The micro-pressure test method of the gravity drainage system in the building room according to claim 1, wherein the filling liquid level in the third step is 1-2mm away from the pipe orifice of the top-extending vent pipe (5).
  6. 6. The micro-pressure test method of the indoor gravity drainage system of the building according to claim 1, wherein the plug in the fourth step is a threaded joint plug (9), and a water injection pipe of the pressure test pump (10) is connected with a metal hose interface on the threaded joint plug (9).
  7. 7. The micro-pressure test method of the indoor gravity drainage system of the building according to claim 1, wherein the pressure of water injection and pressurizing of the gravity drainage system by the test pressure pump (10) in the fourth step reaches 0.01MPa, and the pressure is maintained for 30min.
  8. 8. The method for testing the micro-pressure of the gravity drainage system in the building room according to claim 1, wherein the gravity drainage system in the building room is a single-riser drainage system, a double-riser drainage system or a three-riser drainage system.

Description

Micro-pressure test method for indoor gravity drainage system of building Technical Field The invention relates to the technical field of detection of an indoor gravity drainage system of a building, in particular to a micro-pressure test method of the indoor gravity drainage system of the building. Background In the construction drainage engineering, the water filling test of the indoor gravity drainage engineering is increasingly paid attention as a key link of engineering quality acceptance. The standard of acceptance of construction quality of water supply, water drainage and heating engineering, gb50242-2002, item 5.2.1, specifies that a concealed or buried drainage pipeline must be subjected to a water filling test before concealment, and the water filling height should not be lower than the height of the upper edge or the floor of a bottom sanitary ware. The inspection method comprises the steps of fully filling water for 15min, then observing for a period of time after the water surface falls, and ensuring that the liquid surface does not fall and the pipeline and the interface are qualified. The water filling test is a main means for checking the tightness of the drainage pipeline and the joint thereof. However, the existing irrigation test method is to seal one layer, perform the irrigation test of one layer, and check the tightness of the connection of the drainage pipelines of one layer. The method is characterized in that the operation flow of checking and accepting is continuously repeated in the process of checking and accepting the pipeline, the test time is long, the process is repeated and complicated, one pipeline is required to be closed, one layer of drainage pipeline is irrigated, a certain time is waited for, the checking and accepting are qualified, and then the actions are repeated, so that the water irrigation test is carried out on the drainage pipeline of each layer, the system pipeline checking and accepting cost is extremely high, and the water irrigation test cannot be carried out on the ventilation risers in the double-riser and the three-riser drainage system. The existing indoor gravity drainage system is usually plugged by adopting an inflatable capsule, and CN202018407U discloses a drainage pipeline inflatable capsule irrigation test device, wherein the inflatable capsule is used as a plug of the drainage pipeline. The inflatable capsules are usually arranged at the inspection openings of the vertical pipes, the inspection openings can facilitate the putting in and taking out of the inflatable capsules, but the two-vertical-pipe drainage system and the three-vertical-pipe drainage system are provided with one ventilation vertical pipe without the inspection openings, so that the irrigation test cannot be performed. Disclosure of Invention Aiming at the problems, the invention aims to provide a micro-pressure test method for an indoor gravity drainage system of a building, which aims to solve the problems that the indoor gravity drainage system test is high in labor cost and long in time consumption, and ventilation risers of a double-riser and three-riser drainage system cannot be detected. The technical problem solved by the invention can be realized by adopting the following technical scheme that the micro-pressure test method of the indoor gravity drainage system of the building comprises the following steps: Step one, plugging a reserved water outlet of each layer of the indoor gravity drainage system and a water outlet at the lower end of the indoor gravity drainage system, and keeping the uppermost end of the vertical pipe open when the top-extending vent pipe extends; step two, adding indicating water into the gravity drainage system through the top extending vent pipe; filling tap water into a gravity drainage system through a top-extending vent pipe, and after the water surface is full of water for 10-20 min, filling water again for observation for 3-10 min min, wherein the liquid surface is not lowered; Step four, plugging the top-extending vent pipe, then connecting a pressure testing pump into the plug, injecting water into the gravity drainage system by the pressure testing pump for pressurizing, and maintaining the pressure for a period of time; and fifthly, removing the plug on the top extending vent pipe, installing the vent cap, removing the plug of the discharge port at the lower end of the indoor gravity drainage system, and discharging the water stored in the gravity drainage system. The pipeline of the indoor gravity drainage system is a U-PVC pipe, the reserved water outlet of each layer of the indoor gravity drainage system and the water outlet at the lower end of the indoor gravity drainage system are plugged through a plugging cap, and the plugging cap is connected with the water outlet through glue. The pipeline of the indoor gravity drainage system is an HDPE pipe, and the water outlet are blocked by adopting a welding cap. The indication water