Gate valve pressure testing device

Abstract

The utility model relates to the technical field of gate valve pressure testing, in particular to a gate valve pressure testing device, which not only facilitates the connection between the testing device and a gate valve, avoids frequent disassembly and assembly by workers, improves the testing efficiency, but also can detect the internal sealing performance and the pressure-bearing performance of the gate valve. Cracks of the gate valve can be found in time; comprising a water storage mechanism; the device further comprises a lifting mechanism, a connecting mechanism, an inflation mechanism and a water conveying mechanism, the lifting mechanism is installed on the water storage mechanism and drives the gate valve to move, the connecting mechanism is installed on the water storage mechanism and communicates with the gate valve, and the inflation mechanism is installed on the connecting mechanism and pressurizes the gate valve. The water conveying mechanism is installed on the water storage mechanism and detects whether the gate valve body has cracks or not.

Description

Technical Field

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

[0002] The gate valve's opening and closing element is the gate. The gate's movement direction is perpendicular to the fluid direction. The gate valve seals by contacting the valve seat and the gate. Usually, metal materials are welded onto the sealing surface to increase wear resistance. When the gate valve is closed, the sealing surface can be sealed by the medium pressure or by external force forcibly pressing the gate against the valve seat to ensure the sealing performance of the sealing surface.

[0003] Existing gate valve pressure testing devices, such as the valve pressure testing mechanism disclosed in utility model patent application number 202420341009.8, mainly include a workbench and legs. The workbench has legs evenly distributed at its bottom end, and sealing structures are provided on both sides of its top end. Each sealing structure includes a sealing box, a top cover, sealing bolts, a sealing block, and mounting grooves. The sealing boxes are all fixed to the top of the workbench, and each sealing box has a top cover with mounting grooves evenly distributed inside. During use, the top end of the air inlet pipe is connected to a pipe responsible for injecting air. After connecting to a power source, gas can be injected into the sealing box at the bottom of the air inlet pipe as needed, increasing the air pressure inside the sealing box. After the test, the exhaust pipe is opened to release excess air pressure inside the sealing box.

[0004] However, most existing pressure testing devices require staff to repeatedly disassemble and reassemble the valves, which is very troublesome to use. Moreover, the pressure testing method is relatively simple, only detecting the pressure in the pipeline behind the valve, making it difficult to detect when the gate valve body ruptures and leaks air. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a gate valve pressure testing device that not only facilitates the connection between the testing device and the gate valve, avoiding frequent disassembly and assembly by the staff and improving testing efficiency, but also enables the detection of the internal sealing performance and pressure bearing performance of the gate valve, and timely detection of cracks in the gate valve.

[0006] This utility model discloses a gate valve pressure testing device, comprising a water storage mechanism; it also includes a lifting mechanism, a connecting mechanism, an air-charging mechanism, and a water-transmitting mechanism. The lifting mechanism is installed on the water storage mechanism and drives the gate valve to move; the connecting mechanism is installed on the water storage mechanism and connects the gate valve; the air-charging mechanism is installed on the connecting mechanism and pressurizes the gate valve; and the water-transmitting mechanism is installed on the water storage mechanism and detects whether there are cracks in the gate valve body. The operator places the gate valve on the lifting mechanism, which lowers the gate valve. Then, the connecting mechanism seals and connects the two ends of the gate valve. The air-charging mechanism is activated, and it inflates the gate valve through the connecting mechanism to test the pressure resistance of the gate valve. Simultaneously, water is supplied to the water storage mechanism through the water-transmitting mechanism until the liquid level overflows the gate valve. By observing whether bubbles are generated, it is determined whether the gate valve develops cracks causing air leakage during the pressure-bearing process.

[0007] Preferably, the water storage mechanism includes a water storage tank, a partition, a water supply pipe, and a drain valve. The bottom of the water storage tank is connected to the ground. The water storage tank has an internal cavity. The partition is installed in the cavity of the water storage tank and divides the cavity into a left cavity and a right cavity. The water supply pipe is installed on the partition, and the drain valve is installed on the water supply pipe. The water supply mechanism delivers water from the right cavity to the right cavity of the water storage tank, so that the water level exceeds the top of the gate valve, which facilitates the detection of whether the gate valve is leaking. After the test is completed, the water supply pipe is opened, and the water in the right cavity of the water storage tank is delivered to the left cavity of the water storage tank through the water supply pipe, preventing water from flowing into the connecting mechanism.

[0008] Preferably, the lifting mechanism includes four sets of first hydraulic cylinders, four sets of sliders, four sets of limit rods, two sets of positioning frames, and four sets of handles. Four sets of sliding grooves are opened within the cavity of the water storage tank. All four sets of first hydraulic cylinders are installed on the water storage tank. The four sets of sliders are slidably installed within the four sets of sliding grooves in the water storage tank and are connected to the bottom ends of the four sets of first hydraulic cylinders. Two sets of limit rods are connected and installed between opposing sets of sliders. Two sets of positioning frames are slidably installed on the four sets of limit rods. Positioning slots are opened within the positioning frames, and two sets of handles are installed on each positioning frame. The operator pulls the two sets of handles to move the positioning frames back and forth on the four sets of limit rods, adjusting the distance between the two sets of positioning frames. Then, the gate valve is fixed in the positioning slots of the two sets of positioning frames, and the four sets of first hydraulic cylinders are activated. The four sets of first hydraulic cylinders push the four sets of sliders downwards, aligning the gate valve's connection port with the connecting mechanism.

[0009] Preferably, the connecting mechanism includes four sets of second hydraulic cylinders, two sets of connecting seats, two sets of connecting pipes, two sets of sealing rings, and a pressure detector. The four sets of second hydraulic cylinders are installed in pairs opposite each other in the cavity of the water storage tank. The connecting seats are installed on the two sets of second hydraulic cylinders on the same side. The connecting seats have vent holes inside. The two sets of connecting pipes are installed on the two sets of connecting seats respectively and communicate with the vent holes of the two sets of connecting seats respectively. The two sets of sealing rings are installed on the two sets of connecting pipes respectively. The bottom end of the pressure detector is connected to the top end of the connecting seat and communicates with the vent hole of the connecting seat. The four sets of second hydraulic cylinders push the two sets of connecting seats closer together, so that the two sets of connecting pipes communicate with both ends of the gate valve. The sealing effect is enhanced by setting two sets of sealing rings to prevent air leakage. The inflation mechanism delivers air into the gate valve through the vent hole of the connecting seat on one side for detection. When the pressure detector detects a change in air pressure on the other side, it indicates that there is air leakage in the gate valve.

[0010] Preferably, the inflation mechanism includes a back plate, an air supply pump, an air extraction pipe, an air delivery pipe, and a check valve. The bottom end of the back plate is connected to the top end of the connecting seat. The air supply pump is installed on the back plate, the air extraction pipe is installed on the air supply pump, the air delivery pipe is installed on the air supply pump and communicates with the vent hole of the connecting seat, and the check valve is installed on the air delivery pipe. When the air supply pump is started, the air supply pump draws air through the air extraction pipe, and then delivers the air to the vent hole of the connecting seat through the check valve. The check valve is used to prevent the air pressure in the vent hole from being too high and the airflow from flowing back.

[0011] Preferably, the water conveying mechanism includes a water pump, a pumping pipe, and a second water conveying pipe. The water pump is installed on the water storage tank, the pumping pipe is installed on the water pump and communicates with the left cavity of the water storage tank, and the second water conveying pipe is installed on the water pump and communicates with the right cavity of the water storage tank. When the gate valve is connected to the two sets of connecting pipes, the water pump is started. The water pump draws water out of the left cavity of the water storage tank through the pumping pipe and delivers it to the right cavity of the water storage tank through the second water conveying pipe, so that the water surface submerges the gate valve.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the operator places the gate valve on the lifting mechanism, the lifting mechanism drives the gate valve to descend, and then the connecting mechanism is sealed and connected to both ends of the gate valve. The inflation mechanism is started, and the inflation mechanism inflates the gate valve through the connecting mechanism to test the pressure that the gate valve can withstand. At the same time, water is supplied to the water storage mechanism through the water supply mechanism, and the liquid level overflows the gate valve. By observing whether bubbles are generated, it is determined whether the gate valve has cracked and leaked air during the pressure bearing process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0014] Figure 2 This is a cross-sectional isometric structural diagram of the water storage mechanism of this utility model;

[0015] Figure 3This is a partially enlarged isometric structural diagram of the lifting mechanism of this utility model;

[0016] Figure 4 This is a cross-sectional isometric structural diagram of the connecting mechanism and the water conveying mechanism of this utility model;

[0017] Figure 5 This is a partially enlarged cross-sectional isometric structural diagram of the inflation mechanism of this utility model.

[0018] The attached diagram is labeled as follows: 01, water storage mechanism; 11, water storage tank; 12, partition plate; 13, water supply pipe; 14, drain valve; 02, lifting mechanism; 21, first hydraulic cylinder; 22, slider; 23, limit rod; 24, positioning frame; 25, handle; 03, connecting mechanism; 31, second hydraulic cylinder; 32, connecting seat; 33, connecting pipe; 34, sealing ring; 35, air pressure detector; 04, inflation mechanism; 41, back plate; 42, air supply pump; 43, air extraction pipe; 44, air supply pipe; 45, check valve; 05, water supply mechanism; 51, water pump; 52, water extraction pipe; 53, second water supply pipe. Detailed Implementation

[0019] 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. Example 1

[0020] This utility model discloses a gate valve pressure testing device, comprising a water storage mechanism 01; it also includes a lifting mechanism 02, a connecting mechanism 03, an air-pressurizing mechanism 04, and a water delivery mechanism 05. The lifting mechanism 02 is installed on the water storage mechanism 01 and drives the gate valve to move; the connecting mechanism 03 is installed on the water storage mechanism 01 and connects the gate valve; the air-pressurizing mechanism 04 is installed on the connecting mechanism 03 and pressurizes the gate valve; the water delivery mechanism 05 is installed on the water storage mechanism 01 and detects whether there are cracks in the gate valve body. The water storage mechanism 01 includes a water storage tank 11, a partition 12, a water delivery pipe 13, and a drain valve 14. The bottom end of the water storage tank 11 is connected to the ground. The water tank 11 has an internal cavity. A partition 12 is installed inside the cavity of the water tank 11, dividing the cavity into a left cavity and a right cavity. A water supply pipe 13 is installed on the partition 12, and a drain valve 14 is installed on the water supply pipe 13. The lifting mechanism 02 includes four sets of first hydraulic cylinders 21, four sets of sliders 22, four sets of limit rods 23, two sets of positioning frames 24, and four sets of handles 25. Four sets of sliding grooves are opened inside the cavity of the water tank 11. All four sets of first hydraulic cylinders 21 are installed on the water tank 11. The four sets of sliders 22 are slidably installed in the four sets of sliding grooves of the water tank 11 and are respectively connected to the bottom ends of the four sets of first hydraulic cylinders 21. Two sets of limiting rods 23 are connected and installed between the two sets of sliders 22. Two sets of positioning frames 24 are slidably installed on the four sets of limiting rods 23. The positioning frames 24 have positioning grooves. Two sets of handles 25 are installed on each set of positioning frames 24. The connecting mechanism 03 includes four sets of second hydraulic cylinders 31, two sets of connecting seats 32, two sets of connecting pipes 33, two sets of sealing rings 34 and air pressure detectors 35. The four sets of second hydraulic cylinders 31 are installed in pairs opposite each other in the cavity of the water storage tank 11. The connecting seats 32 are installed on the two sets of second hydraulic cylinders 31 on the same side. The connecting seats 32 have vent holes inside. The two sets of connecting pipes 33 are respectively installed on the two sets of connecting seats 32. The two sets of sealing rings 34 are respectively installed on the two sets of connecting pipes 33 and the bottom end of the air pressure detector 35 is connected to the top end of the connecting seat 32 and communicates with the inside of the air vent of the connecting seat 32. The inflation mechanism 04 includes a back plate 41, an air supply pump 42, an air extraction pipe 43, an air delivery pipe 44 and a check valve 45. The bottom end of the back plate 41 is connected to the top end of the connecting seat 32. The air supply pump 42 is installed on the back plate 41. The air extraction pipe 43 is installed on the air supply pump 42. The air delivery pipe 44 is installed on the air supply pump 42 and communicates with the inside of the air vent of the connecting seat 32. The check valve 45 is installed on the air delivery pipe 44.During operation, the operator first moves the positioning frame 24 back and forth on the four limit rods 23 by pulling the two sets of handles 25, adjusting the distance between the two sets of positioning frames 24. Then, the gate valve is fixed in the positioning groove of the two sets of positioning frames 24. The four sets of first hydraulic cylinders 21 are activated, pushing the four sets of sliders 22 downward to align the gate valve's connection port with the two sets of connecting pipes 33. The four sets of second hydraulic cylinders 31 push the two sets of connecting seats 32 closer together, connecting the two sets of connecting pipes 33 to both ends of the gate valve. The sealing effect is enhanced by setting two sets of sealing rings 34 to prevent air leakage. The air supply pump 42 is then activated to supply air. Air pump 42 draws air through air extraction pipe 43, and then delivers the air to the vent hole of connecting seat 32 through check valve 45. The check valve 45 prevents backflow of air due to excessive pressure in the vent hole. When air pressure detector 35 detects a change in air pressure, it indicates a leak in the gate valve. Water delivery mechanism 05 delivers water from the cavity to the right cavity of the reservoir 11, ensuring the water level exceeds the top of the gate valve for easy detection of leaks. After testing, water delivery pipe 13 is opened, and water from the right cavity of the reservoir 11 is delivered to the cavity of the reservoir 11 through water delivery pipe 13, preventing water from entering the connecting mechanism 03. Example 2

[0021] like Figures 1 to 5As shown, this utility model discloses a gate valve pressure testing device based on embodiment 1. The water supply mechanism 05 includes a water pump 51, a pumping pipe 52, and a second water supply pipe 53. The water pump 51 is installed on the water storage tank 11, the pumping pipe 52 is installed on the water pump 51 and communicates with the left cavity of the water storage tank 11, and the second water supply pipe 53 is installed on the water pump 51 and communicates with the right cavity of the water storage tank 11. During operation, firstly, the operator pulls two sets of handles 25 to move the positioning frame 24 back and forth on four sets of limit rods 23, adjusting the distance between the two sets of positioning frames 24. Then, the gate valve is fixed in the positioning groove of the two sets of positioning frames 24. The four sets of first hydraulic cylinders 21 are activated, and the four sets of first hydraulic cylinders 21 push the four sets of sliders 22 downward to align the gate valve connection port with the two sets of connecting pipes 33. The four sets of second hydraulic cylinders 31 push the two sets of connecting seats 32 closer together, so that the two sets of connecting pipes... The two ends of the 33 are connected to the gate valve. The sealing effect is enhanced by setting two sets of sealing rings 34 to prevent air leakage. The air supply pump 42 is started. The air supply pump 42 draws air through the air extraction pipe 43 and then delivers the air to the vent hole of the connecting seat 32 through the check valve 45. The check valve 45 is set to prevent the air pressure in the vent hole from being too high and the airflow from flowing back. When the air pressure detector 35 detects a change in air pressure, it indicates that there is air leakage in the gate valve. After the gate valve is connected to the two sets of connecting pipes 33, the water pump 51 is started. The water pump 51 draws water out of the left cavity of the water storage tank 11 through the water extraction pipe 52 and delivers it to the right cavity of the water storage tank 11 through the second water supply pipe 53, so that the water surface submerges the gate valve, which facilitates the detection of whether the gate valve is leaking. After the test is completed, the water supply pipe 13 is opened, and the water in the right cavity of the water storage tank 11 is delivered to the left cavity of the water storage tank 11 through the water supply pipe 13, preventing water from flowing into the connecting mechanism 03.

[0022] The air pump 42 and water pump 51 of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0023] 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 gate valve pressure testing device, comprising a water storage mechanism (01); characterized in that, It also includes a lifting mechanism (02), a connecting mechanism (03), an air-pressurizing mechanism (04), and a water-transferring mechanism (05). The lifting mechanism (02) is installed on the water storage mechanism (01) and drives the gate valve to move. The connecting mechanism (03) is installed on the water storage mechanism (01) and connects the gate valve. The air-pressurizing mechanism (04) is installed on the connecting mechanism (03) and pressurizes the gate valve. The water-transferring mechanism (05) is installed on the water storage mechanism (01) and detects whether there are cracks in the gate valve body.

2. The gate valve pressure testing device as described in claim 1, characterized in that, The water storage mechanism (01) includes a water storage tank (11), a partition (12), a water supply pipe (13), and a drain valve (14). The bottom end of the water storage tank (11) is connected to the ground. The water storage tank (11) has a cavity inside. The partition (12) is installed in the cavity of the water storage tank (11) and divides the cavity of the partition (12) into a left cavity and a right cavity. The water supply pipe (13) is installed on the partition (12), and the drain valve (14) is installed on the water supply pipe (13).

3. The gate valve pressure testing device as described in claim 2, characterized in that, The lifting mechanism (02) includes four sets of first hydraulic cylinders (21), four sets of sliders (22), four sets of limit rods (23), two sets of positioning frames (24) and four sets of handles (25). The cavity of the water storage tank (11) has four sets of sliding grooves. The four sets of first hydraulic cylinders (21) are all installed on the water storage tank (11). The four sets of sliders (22) are slidably installed in the four sets of sliding grooves of the water storage tank (11) and are respectively connected to the bottom end of the four sets of first hydraulic cylinders (21). Two sets of limit rods (23) are connected and installed between the two sets of sliders (22). The two sets of positioning frames (24) are slidably installed on the four sets of limit rods (23). The positioning frames (24) have positioning grooves. Two sets of handles (25) are installed on each set of positioning frames (24).

4. The gate valve pressure testing device as described in claim 2, characterized in that, The connecting mechanism (03) includes four sets of second hydraulic cylinders (31), two sets of connecting seats (32), two sets of connecting pipes (33), two sets of sealing rings (34) and a pressure detector (35). The four sets of second hydraulic cylinders (31) are installed in pairs opposite each other in the cavity of the water storage tank (11). The connecting seats (32) are installed on the two sets of second hydraulic cylinders (31) on the same side. The connecting seats (32) have ventilation holes inside. The two sets of connecting pipes (33) are installed on the two sets of connecting seats (32) respectively and are connected to the ventilation holes of the two sets of connecting seats (32) respectively. The two sets of sealing rings (34) are installed on the two sets of connecting pipes (33) respectively. The bottom end of the pressure detector (35) is connected to the top end of the connecting seat (32) and is connected to the ventilation hole of the connecting seat (32).

5. The gate valve pressure testing device as described in claim 4, characterized in that, The inflation mechanism (04) includes a back plate (41), an air supply pump (42), an air extraction pipe (43), an air delivery pipe (44), and a check valve (45). The bottom end of the back plate (41) is connected to the top end of the connecting seat (32). The air supply pump (42) is installed on the back plate (41). The air extraction pipe (43) is installed on the air supply pump (42). The air delivery pipe (44) is installed on the air supply pump (42) and communicates with the inside of the vent hole of the connecting seat (32). The check valve (45) is installed on the air delivery pipe (44).

6. The gate valve pressure testing device as described in claim 2, characterized in that, The water conveying mechanism (05) includes a water pump (51), a water pumping pipe (52), and a second water conveying pipe (53). The water pump (51) is installed on the water storage tank (11), the water pumping pipe (52) is installed on the water pump (51) and communicates with the inside of the left cavity of the water storage tank (11), and the second water conveying pipe (53) is installed on the water pump (51) and communicates with the inside of the right cavity of the water storage tank (11).

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