A valve water pressure test exhaust device

Abstract

The utility model relates to the technical field of valve test, especially a valve hydrostatic test exhaust device, its structure is reasonable, exhaust is thorough, degree of automation is high and can effectively collect and discharge gas, including tee pipe body, automatic exhaust valve and manual spare exhaust valve. Three ports of tee pipe body are connected valve, pressure source and exhaust passage respectively. Automatic exhaust valve (preferably float ball type) is used for automatic detection and exhaust gas in pipeline, and exhaust is thorough and is automatically closed. Manual spare exhaust valve is connected in parallel with automatic valve, and provides emergency exhaust guarantee. The utility model can also integrate gas collecting tank with observation window and blowdown valve on exhaust passage, and set pressure sensor and quick coupling at water inlet. The device realizes the automation of exhaust process before valve hydrostatic test, effectively guarantees the accuracy and stability of test pressure, and improves test efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the technical field of valve testing, and in particular to a valve water pressure test venting device. Background Technology

[0002] Valves are important devices used to control pipeline opening and closing, and are widely used. Valve bodies and covers are usually cast. To detect casting defects in the valve body and cover, a hydrostatic test is required before valve assembly to check for leaks and prevent losses due to leakage after assembly and use. For example, prior art publication number CN208721334U proposes a rapid hydrostatic testing device for valves. It includes a frame with a lower platform and an upper platform, the upper platform being slidably connected to the frame. The lower side of the upper platform has an exhaust port and a water inlet. The exhaust port has an exhaust valve, and the water inlet is connected to a water supply device. A drive device for driving the upper platform is located between the upper platform and the frame. Before hydrostatic strength and sealing tests, the air in the valve cavity and connecting pipelines must be completely purged. If air is not completely purged, the compressibility of gas will cause unstable pressure readings and slow response, seriously affecting the accuracy and reliability of the test results. Currently, the common purging method is to install a manual exhaust valve at a high point in the pipeline for manual observation and operation. This method has the following drawbacks: incomplete venting, reliance on manual experience to judge the venting endpoint, difficulty in ensuring complete gas removal, and easy retention of air bubbles; low efficiency, requiring continuous monitoring by personnel, especially during batch testing, which is time-consuming and labor-intensive. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a valve water pressure test exhaust device with reasonable structure, thorough exhaust, high degree of automation, and effective collection of exhaust gas.

[0004] This utility model discloses a valve hydrostatic test venting device, comprising a three-way pipe body, an automatic venting valve, and a manual standby venting valve; the first port of the three-way pipe body is a water inlet for connecting a valve or test pipeline, the second port is a pressure interface for connecting a water pump or pressure source, and the third port is a venting interface; the automatic venting valve is installed on the venting interface; the manual standby venting valve is also installed on the three-way pipe body and is arranged in parallel with the automatic venting valve.

[0005] Preferably, the automatic air vent valve is a float-type automatic air vent valve, which has an internal float mechanism that controls opening and closing by buoyancy.

[0006] Preferably, the three-way pipe body is provided with a gas collection tank, the top interface of the gas collection tank is connected to the exhaust interface, and both the automatic exhaust valve and the manual standby exhaust valve are installed on the top of the gas collection tank.

[0007] Preferably, the side wall of the gas collecting tank is provided with a transparent observation window.

[0008] Preferably, the bottom of the gas collecting tank is provided with a drain valve.

[0009] Preferably, both the water inlet and the pressure interface are equipped with high-pressure quick connectors.

[0010] Preferably, a pressure sensor is also installed at the water inlet.

[0011] Compared with existing technologies, the advantages of this utility model are as follows: 1. Thorough venting and high precision: The float mechanism automatically senses gas and liquid, ensuring that the gas is completely vented before automatically closing, effectively avoiding human error and guaranteeing the accuracy of the hydrostatic test; 2. High degree of automation: The entire venting process is fully automatic, requiring no manual monitoring or operation, and can be integrated with automated testing systems, significantly improving testing efficiency and reducing labor costs and operational risks; 3. Safety redundancy: A manual backup venting valve is provided to offer emergency protection in case the automatic venting valve fails or rapid pressure relief is required, improving the safety and reliability of the device; 4. Functional integration and visual management: The integrated gas collection tank, observation window, drain valve, and pressure sensor facilitate observation, maintenance, and data acquisition, improving the overall performance and ease of use of the device. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the isometric structure of this utility model; Figure 3 This is a bottom-view three-dimensional structural diagram of the present invention; Figure 4 This is a three-dimensional structural diagram of the rear side of this utility model; The following are labeled in the attached diagram: 1. Tee body; 2. Inlet; 3. Pressure port; 4. Vent port; 5. Automatic vent valve; 6. Manual standby vent valve; 7. Air collection tank; 8. Transparent observation window; 9. Drain valve; 10. High-pressure quick connector; 11. Pressure sensor. Detailed Implementation

[0013] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0014] like Figures 1 to 4As shown, the core of this application is a three-way pipe body 1. The first port of the three-way pipe body 1 is the water inlet 2, on which a high-pressure quick connector 10 and a pressure sensor 11 are installed for connecting to the valve under test. The second port is the pressure interface 3, also equipped with a high-pressure quick connector 10 for connecting to the pressure testing pump. The third port is the vent interface 4; a vertically placed air collection tank 7 is connected to the vent interface 4. A float-type automatic vent valve 5 and a manual standby vent valve 6 are installed on the top of the air collection tank 7, forming a parallel venting passage. A transparent observation window 8 is embedded in the side wall of the air collection tank 7, and a drain valve 9 is installed at its bottom.

[0015] like Figures 1 to 4 As shown, this utility model discloses a valve hydrostatic test venting device. During operation, when conducting a valve hydrostatic test, the inlet 2 of the device is connected to the valve under test, and the pressure port 3 is connected to the test pump. The test pump is started to inject water into the valve, driving out air from the valve and pipeline, which then enters the top of the air collection tank 7 through the three-way pipe 1. At this time, the float in the automatic vent valve 5 is in the falling position due to the absence of water or low water level in the tank, opening the vent and allowing the gas to be discharged smoothly. When the gas is completely discharged and water enters the air collection tank 7, the float rises under buoyancy, automatically closing the vent to prevent water leakage. The operator can confirm through the observation window 8 that no air bubbles have been discharged and that the pressure sensor 11 reading is stable before starting the formal pressure holding test. If the automatic vent valve 5 malfunctions, the manual backup vent valve 6 can be opened to complete the venting. During test intervals, any accumulated impurities can be cleaned through the drain valve 9.

[0016] The pressure sensor 11 of the valve water pressure test exhaust device of this utility model is purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0017] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A valve hydrostatic test venting device, characterized in that, It includes a three-way pipe body (1), an automatic air vent valve (5), and a manual standby air vent valve (6); the first port of the three-way pipe body (1) is the water inlet (2), the second port is the pressure interface (3), and the third port is the air vent interface (4); the automatic air vent valve (5) is installed on the air vent interface (4); the manual standby air vent valve (6) is also installed on the three-way pipe body (1) and is set in parallel with the automatic air vent valve (5).

2. The valve hydrostatic test venting device as described in claim 1, characterized in that, The automatic air release valve (5) is a float-type automatic air release valve.

3. The valve hydrostatic test venting device as described in claim 2, characterized in that, The three-way pipe body (1) is provided with a gas collection tank (7), the top interface of the gas collection tank (7) is connected to the exhaust interface (4), and the automatic exhaust valve (5) and the manual standby exhaust valve (6) are both installed on the top of the gas collection tank (7).

4. The valve hydrostatic test venting device as described in claim 3, characterized in that, The gas collecting tank (7) has a transparent observation window (8) on its side wall.

5. The valve hydrostatic test venting device as described in claim 3, characterized in that, The bottom of the gas collection tank (7) is equipped with a drain valve (9).

6. The valve hydrostatic test venting device as described in claim 1, characterized in that, High-pressure quick connectors (10) are installed at both the water inlet (2) and the pressure interface (3).

7. The valve hydrostatic test venting device as described in claim 1, characterized in that, A pressure sensor (11) is also installed at the water inlet (2).

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