CN217132434U - Testing arrangement of building drainage system atmospheric pressure fluctuation and water seal loss relation - Google Patents

Abstract

The utility model relates to a testing device for the relationship between air pressure fluctuation and water seal loss of a building drainage system, which comprises a positive/negative pressure generating device, an air pressure balancing device and a testing pipeline forming combined testing device which are connected in sequence; the positive/negative pressure generating device is provided with a negative pressure suction port and a positive pressure air supply port; an air inlet and an air outlet are respectively arranged at two sides of the air pressure balancing device, the air inlet of the air pressure balancing device is communicated with the positive/negative pressure generating device, an air inlet valve control switch is arranged between the air pressure balancing device and the positive/negative pressure generating device, and the air outlet of the air pressure balancing device is communicated with a test pipeline; the test pipeline comprises a U-shaped pressure measuring pipe, an air outlet valve, a precise digital pressure gauge and an active joint which are connected with each other, and the active joint is communicated with the water seal device to be tested. The utility model discloses utensil processing is simple and convenient, and advantages such as low in cost provide an easily realized testing arrangement for exploring drainage system atmospheric pressure fluctuation and water seal loss relation.

Description

A test device for the relationship between air pressure fluctuation and water seal loss in building drainage system

technical field

The utility model relates to a testing device for the relationship between air pressure fluctuation and water seal loss in a building drainage system, which is suitable for measuring the relationship between air pressure fluctuation and water seal loss in a drainage system, and belongs to the technical field of water supply and drainage.

Background technique

Under the current conditions, ensuring unobstructed drainage pipes, preventing water seal damage and maintaining the quality of living environment are the basic principles of drainage system design. According to the "Safety Evaluation Standard for Building and Industrial Water Supply and Drainage System" (GB/T 51188-2016) 10.2.1(2), the air pressure fluctuation range in the drainage system should be within the design control value, and when there is no design given value , should be controlled between -400Pa ~ +400Pa, exceeding this value may cause positive pressure splash or negative pressure suction, thereby destroying the water seal performance. For a long time, it is generally believed that the function of water seal is to resist the air pressure fluctuation in the drainage pipeline through a certain height of water storage liquid column, so as to prevent the odor from entering the room. Therefore, the relevant specifications clearly stipulate the height of the water seal. With the deepening of research in recent years, it has been recognized that there are multiple factors affecting the strength of water seals, such as water seal structure, water seal depth, water seal ratio, water seal capacity, and water seal natural oscillation frequency. The multi-dimensional parameter optimization based on water seal safety still needs to be deeply discussed. Therefore, an easy-to-implement and accurate test method and device for the relationship between air pressure fluctuations and water seal losses in building drainage systems are needed to evaluate the performance of water seals.

The Chinese patent application document No. 200810223684.6 introduces a drainage system air pressure fluctuation test device, which provides a technical platform for improving the drainage flow, reducing the air pressure fluctuation in the riser, and improving the water passing capacity of the drainage system, but it does not consider However, the multi-dimensional parameters of the water seal affect the performance of the water seal, so the application is limited.

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to provide an easy-to-implement test device for the relationship between air pressure fluctuation and water seal loss in a building drainage system, which is easy to install and process and can provide stable positive and negative pressure conditions.

In order to achieve the above purpose, the utility model has developed a test device for the relationship between air pressure fluctuation and water seal loss in a building drainage system, which is characterized in that it includes a combination of positive/negative pressure generating devices, air pressure balancing devices and test pipelines that are connected in sequence. test device.

The positive/negative pressure generating device is provided with a negative pressure suction port and a positive pressure air supply port;

Air inlet and outlet are arranged on both sides of the air pressure balancing device. The air inlet of the air pressure balancing device is communicated with the positive/negative pressure generating device. There is an intake valve control switch between the air pressure balancing device and the positive/negative pressure generating device. The air outlet of the device is communicated with the test pipeline;

The test pipeline includes a U-shaped pressure measuring pipe, an air outlet valve, a precision digital pressure gauge, and an active joint connected on the pipe, and the active joint is connected with the water seal to be tested;

The positive/negative pressure generating device adopts a positive/negative pressure dual-purpose vacuum cleaner. The vacuum cleaner is provided with a negative pressure suction port and a positive pressure air supply port. The power of the positive/negative pressure generating device is 100-1200W, and the vacuum degree is 0.1 ~10kPa;

Preferably, the air pressure balancing device is an iron hoop sealed barrel with a rubber sealing ring, and the material of the air pressure balancing device is made of steel or thick-walled PE material, with a capacity of 60-100 L and a barrel wall thickness of 2-3 mm;

Preferably, the air inlet and the air outlet on both sides of the barrel of the air pressure balancing device adopt internal and external threaded joints with sealing rubber rings;

Preferably, the U-shaped pressure measuring tube is provided with a scale of 100 cm, the U-shaped pressure measuring tube is made of quartz glass tube, the diameter of the tube is φ6-8mm, and the test air pressure variation range is -5000Pa～+5000Pa;

Preferably, the precision digital pressure gauge adopts a 5-digit display pressure gauge, and the pressure measurement range is -100kPa～+100MPa;

Preferably, the air inlet valve and the air outlet valve are controlled by a ball valve;

Preferably, pipes with good air tightness such as PPR pipes are used between the devices to avoid air leakage;

The material of the active joint is a silicone soft joint, and the wall thickness of the silicone soft joint is 2-3 mm, which is connected with the water seal test device to be tested, and is fixed and sealed by a stainless steel clamp.

Compared with the prior art method, the utility model has the advantages of simple installation and processing, low cost, simple maintenance, and the compressed air system and the negative pressure suction system use the same equipment to operate, etc. An easy-to-implement test setup.

Description of drawings

1 is a schematic diagram of the overall structure of the present utility model;

Fig. 2 is the relationship diagram of the water seal loss caused by different water seal heights of the utility model device against negative pressure;

Fig. 3 is the relationship diagram of the water seal loss caused by different water seal ratios against positive pressure of the device of the present invention;

Labeling instructions: 1-positive/negative pressure generating device, 2-air pressure balance device, 3-U-type pressure measuring tube, 4-precision digital pressure gauge, 5-active joint, 6-inlet valve, 7-outlet valve.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clear, the following describes the embodiments of the present utility model with reference to the accompanying drawings, and further illustrates through implementation examples.

1 is a schematic diagram of the overall structure of the present utility model, and the use steps of the present utility model are as follows:

Before the test, check that the air inlet valve 6 and the air outlet valve 7 are in the closed state, and the active joint 5 is connected to the water seal test device to be tested, and the airtight state is ensured;

Select positive pressure or negative pressure according to the conditions required for the test, which can be connected to the negative pressure suction port or the positive pressure air supply port of the positive/negative pressure generating device 1 respectively;

Start the positive/negative pressure generating device 1, open the intake valve 6, and observe the liquid level difference of the U-shaped pressure measuring tube 3. When the liquid level difference between the two ends of the U-shaped pressure measuring tube 3 reaches the liquid level difference required for the test (10mmH ₂ O=100Pa), first close the intake valve 6, and then close the positive/negative pressure generating device 1;

Open the air outlet valve 7, the air pressure in the air pressure balance device 2 acts on the water seal test device to be tested, observe the pressure value in the precision digital pressure gauge 4, the action time is determined according to the conditions required for the test, and the air outlet is closed after the set time. Valve 7.

The water seal test device to be tested will lose a certain amount of water after being acted by the air pressure in the air pressure balance device 2. After the water level in the water seal test device to be tested is stabilized, it is judged by measuring the loss value of the liquid level height in the water seal test device to be tested. The relationship between the air pressure fluctuation of the drainage system and the loss of the water seal;

The test results show that with the increase of air pressure, the loss of water seal increases.

Implementation Example 1

In Example 1, the device includes a positive/negative pressure generating device, an air pressure balancing device and a test pipeline that are connected in sequence to form a combined test device. The positive/negative pressure generating device 1 adopts a barrel vacuum cleaner with a vacuum degree of 0.1KPa. The negative pressure suction port is connected with the PPR pipe, and the opening degree of the intake valve 6 is provided between the positive/negative pressure generating device 1 and the air pressure balancing device 2 to control the gas flow; the air pressure balancing device 2 is equipped with a rubber seal. The barrel is sealed with an iron hoop, the material of the air pressure balance device is PE plastic barrel, the capacity is 80L, and the thickness of the barrel wall is 2mm. Threaded joint, the internal and external threaded joints at the air outlet are connected with the PPR pipe, the air pressure balance device 2 and the U-shaped pressure measuring tube 3 use the principle of the connector to grasp the air pressure value in the device; the metal connection port of the precision digital pressure gauge 4 is connected to the PPR pipe The end of the PPR tube is connected to the water seal device to be tested through an active joint 5 silicone hose and is fixed and sealed with a stainless steel clamp. The water seal device to be tested has a water seal height of 50mm and 100mm.

In this embodiment 1, the height of the water seal is set to be 50mm and 100mm, and the test pressures are respectively -100Pa, -150Pa, -200Pa, -250Pa, -300Pa, -350Pa, -400Pa, -450Pa, -500Pa, -550Pa, -600Pa, -650Pa, -700Pa, -750Pa, -800Pa, -850Pa, -900Pa against the water seal loss caused by negative pressure, the action time of each pressure value is 60s and the test is repeated three times, take the water seal test device to be tested The average value of the height of the water seal loss after the liquid level is restored;

The test results are shown in Figure 2. The results show that with the increase of the height of the water seal, the pressure value against the negative pressure when the water seal is broken down is greater;

Implementation Example 2

In Example 2, the device includes a positive/negative pressure generating device, an air pressure balancing device and a test pipeline that are connected in turn to form a combined test device. The positive/negative pressure generating device 1 adopts a vacuum degree of 3.5KPa barrel type vacuum cleaner. The positive pressure air supply port is connected to the PPR pipe, and the opening degree of the intake valve 6 is provided between the positive/negative pressure generating device 1 and the air pressure balancing device 2 to control the gas flow; the air pressure balancing device 2 is equipped with a rubber sealing ring The air pressure balance device is made of stainless steel barrel, the capacity is 60L, and the thickness of the barrel wall is 3mm. The air inlet and outlet on both sides of the air pressure balance device 2 barrels use internal and external threaded joints with sealing rubber rings. , the internal and external threaded joints at the air outlet are connected to the PPR pipe, the air pressure balance device 2 and the U-shaped pressure measuring pipe 3 use the principle of the connector to grasp the air pressure value in the device; the metal connection port of the precision digital pressure gauge 4 is connected to the PPR pipe, The end of the PPR tube is connected to the water sealing device to be tested through an active joint 5 silicone hose, and is fixed and sealed with a stainless steel clamp. 2, 1:1, 2:1, 3:1, 4:1.

In this example 2, the water sealing ratio is set to be 1:4, 1:3, 1:2, 1:1, 2:1, 3:1, 4:1, and the test pressures are 150Pa, 200Pa, 250Pa, 300Pa respectively , 350Pa, 400Pa, 450Pa, 500Pa, 550Pa, 600Pa against the water seal loss caused by positive pressure, the action time of each pressure value is 60s and the test is repeated three times, and the water seal loss after the liquid level is restored by the water seal test device to be tested is taken. height average;

The test results are shown in Figure 3. The results show that when the positive pressure value is the same, with the increase of the water seal ratio (1:4 to 4:1), the smaller the loss of the water seal, the greater the ability of the water seal ratio to resist the positive pressure improve.

Finally, it should be noted that the above is only a preferred example of the present utility model, and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (5)

1. a test device for building drainage system air pressure fluctuation and water seal loss relationship, it is characterized in that: comprise the positive/negative pressure generating device, the air pressure balancing device and the test pipeline that are connected successively to form a combined test device; The pressure generating device is provided with a negative pressure suction port and a positive pressure air supply port; an air inlet and an air outlet are respectively provided on both sides of the air pressure balancing device, the air inlet of the air pressure balancing device is communicated with the positive/negative pressure generating device, and the air pressure balancing device is connected with the positive pressure generating device. There is an intake valve control switch between the negative pressure generating device, and the air outlet of the air pressure balancing device is communicated with the test pipeline; the test pipeline includes a U-shaped pressure measuring tube, an air outlet valve, and a precision digital pressure gauge connected to the pipe. , Active joint, the active joint is connected with the water sealing device to be tested. 2. The test device for the relationship between air pressure fluctuation and water seal loss in a building drainage system according to claim 1, wherein the positive/negative pressure generating device adopts a positive/negative pressure dual-purpose vacuum cleaner, and the vacuum cleaner is provided with a negative pressure vacuum cleaner. Pressure suction port and positive pressure air supply port, the power of the positive/negative pressure generating device is 100-1200W, and the vacuum degree is 0.1-10kPa. 3. the test device of the relationship between air pressure fluctuation and water seal loss of a building drainage system according to claim 1, it is characterized in that described air pressure balance device is the iron hoop sealing barrel with rubber sealing ring, and described air pressure balance The material of the device adopts the material that can resist positive/negative pressure, the capacity is 60-100L, and the thickness of the barrel wall is 2-3mm. 4. the test device of the relationship between air pressure fluctuation and water seal loss of a building drainage system according to claim 1, is characterized in that described U-shaped pressure measuring tube is provided with the scale of 100cm, and described U-shaped pressure measuring The pipe material is transparent pipe, and its test air pressure change range is -5000Pa ~ +5000Pa. 5 . The device for testing the relationship between air pressure fluctuation and water seal loss in a building drainage system according to claim 1 , wherein the material of the active joint is a silicone soft joint, which is connected to the water seal to be tested. 6 .

Images