Valve leakproofness test device

Abstract

The utility model relates to the technical field of valve measurement, and discloses a valve tightness test device, which comprises a test platform and an arranged screw rod, a rotary handle is arranged on the surface of the screw rod, a sealing gasket is additionally arranged at the bottom end of the screw rod, and a test valve is additionally arranged below the sealing gasket; the water outlet end of the water tank is communicated with a first pipeline, the surface of the first pipeline is respectively connected with a piston pump, an overflow valve and a pressure gauge, and the end part of the overflow valve is communicated with a third pipeline; the second pipeline is respectively communicated with the test platform and the first pipeline, and the surface of the second pipeline is connected with an isolation door. According to the valve leakproofness test device, the screw rod is adjusted by rotating the handle, the sealing gasket and the test valve are fixed, the isolation door is opened, the pressure of the overflow valve is set, the piston pump is started for a pressing test, water enters the test platform along the first pipeline and the second pipeline, the overflow valve is automatically started for backflow after the test pressure is reached, and the water flows back to the water tank along the third pipeline.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve measurement technical field, concretely is a valve tightness test device. BACKGROUND

[0002] Valve is the control component in fluid conveying system, has the functions such as cut-off, regulation, flow guide, prevent backflow, pressure stabilization, shunt or overflow pressure relief. Valve is the device for controlling the direction, pressure, flow of fluid in fluid system, is the device for making the medium in piping and equipment flow or stop and can control its flow. Valve can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive medium and various types of fluids. It is widely used in water supply and drainage, petroleum chemical industry, metallurgy, air conditioning, refrigeration, thermal power station, petroleum, gas, chemical industry, water treatment and other industrial fields. In order to ensure the sealing performance of valve, tightness test device needs to be used for detection when measuring.

[0003] Common valve tightness test device is usually composed of main accumulator, auxiliary accumulator, air compressor, variable frequency water supplement pump, A-grade water storage tank valve, measuring instrument and pipeline mechanism. Main accumulator is used to store pressure medium, such as gas or water, so as to provide stable pressure in test process. Auxiliary accumulator is used to assist main accumulator to provide pressure, so as to ensure the continuity and stability of test pressure. Air compressor is used to charge air into accumulator to provide gas source required by gas pressure test. Variable frequency water supplement pump can be used to charge deionized water or other suitable medium into accumulator in liquid pressure test. A-grade water storage tank is used to store deionized water or other test medium, so as to ensure the cleanliness and stability of medium. Valve, measuring instrument and pipeline are used to connect various components, so as to ensure the accuracy of medium flow and pressure measurement.

[0004] The traditional valve tightness test device first makes the liquid in the water tank flow along the pipeline to the valve, and detects the liquid pressure through the pressure gauge. When the liquid pressure in the pipeline exceeds the required pressure of the test, the excess liquid is discharged outside the pipeline. However, this method directly discharges the liquid outside, which not only wastes water resources and does not meet the environmental protection requirements, but also increases the cost required for the test. Therefore, a valve tightness test device is proposed. UTILITY MODEL CONTENTS

[0005] (I) Technical problem solved

[0006] In view of the deficiencies of the prior art, the utility model provides a valve tightness test device to solve the technical problem that the above-mentioned method not only wastes water resources, does not meet the environmental protection requirements, but also increases the cost required for the test.

[0007] (II) Technical scheme

[0008] To achieve the above object, the utility model provides the following technical scheme: a valve tightness test device, include,

[0009] Test platform and the screw rod of setting in the upper surface, and the surface of screw rod is equipped with the rotating handle, and the bottom of screw rod is equipped with the sealing washer, and the lower side of sealing washer is equipped with the test valve,

[0010] Water tank is set to the outside of test platform, and the water outlet of water tank is connected with first pipeline, and the surface of first pipeline is connected with piston pump, overflow valve and pressure gauge respectively, and the water outlet of first pipeline is connected with drain door, and the water outlet of overflow valve is connected with third pipeline, and the water inlet of water tank is communicated with the water outlet of third pipeline,

[0011] Second pipeline is set to the surface of first pipeline, and second pipeline is connected with the water inlet of test platform and the surface of first pipeline respectively, and the surface of second pipeline is connected with the isolation door. When the tightness test of test valve is carried out, first fill water in water tank, then place test valve on test platform according to the valve of different model size installs corresponding sealing washer, then adjust the position of screw rod using rotating handle, make sealing washer and test valve fixed, open isolation door after test valve is fixed, then set the pressure of overflow valve, adjust test pressure in this way, start piston pump to carry out pressure test after completion, make water in water tank along first pipeline and second pipeline into test platform, and carry out tightness test to test valve, when reaching test pressure, overflow valve opens automatically and flows back, and the excess water flows back to water tank along third pipeline, and the cooperation of piston pump and overflow valve maintains pressure stability, and carries out pressure test, and stops piston pump operation after test is finished, and releases water storage through drain door. On the one hand, not only can water be recycled and meet environmental protection requirements, but also can reduce the cost required by test, on the other hand, sealing washer can be replaced according to the size of test valve, and the applicability of the device is improved.

[0012] Preferably, the number of sealing washers is two, and the sealing washers are arranged at the water inlet of the test platform and the screw rod. The sealing washers prevent leakage at the water inlet of the test platform.

[0013] Preferably, the two ends of the test valve are tightly attached to the surfaces of the sealing washers, and the sealing washers are circular in design. The sealing washers ensure the tightness of the ends of the test valve and prevent leakage.

[0014] Preferably, the upper surface of the test platform is provided with a threaded hole, and the inner wall of the threaded hole is provided with internal threads. The end of the screw rod extends downward through the threaded hole. The screw rod can be raised and lowered along the threaded hole to prevent deviation during movement.

[0015] Preferably, the outer surface of the screw rod is provided with external threads, and the screw rod is threadedly connected with the threaded hole.

[0016] Preferably, the outer surface of the first pipe is provided with a water outlet hole, and the water outlet hole is in communication with the water inlet end of the second pipe.

[0017] (Three) beneficial effects

[0018] Compared with the prior art, the utility model provides a valve tightness test device, has the following beneficial effects:

[0019] The valve tightness test device places the test valve on the test platform, adjusts the position of the screw rod by using the rotary handle, fixes the sealing gasket and the test valve, opens the isolation door after the test valve is fixed, sets the pressure of the overflow valve, adjusts the test pressure in this way, starts the piston pump to carry out the pressure test after completion, makes the water in the water tank enter the test platform along the first pipe and the second pipe, and carries out the tightness test on the test valve, the overflow valve is automatically opened to return when the test pressure is reached, the excessive water returns to the water tank along the third pipe, the pressure is maintained stable by the cooperation of the piston pump and the overflow valve, and the pressure test is carried out, the piston pump stops running after the test is finished, and the stored water is discharged through the water drain door. ACCURACY

[0020] Figure 1 It is the whole structure schematic view of the utility model;

[0021] Figure 2 It is the test platform connecting structure schematic view of the utility model.

[0022] In the drawing: 1, test platform;2, screw rod;3, rotary handle;4, sealing gasket;5, test valve;6, water tank;7, first pipe;8, piston pump;9, overflow valve;10, pressure gauge;11, water drain door;12, second pipe;13, isolation door;14, third pipe. SPECIFIC IMPLEMENTATION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] The utility model provides a technical scheme, a valve tightness test device, include: Figure 1 、 Figure 2 , test platform 1 and set up in the screw rod 2 of upper surface, and the surface mounting has rotary handle 3 of screw rod 2, and be added with sealing washer 4 in the bottom end of screw rod 2, and sealing washer 4 is added with test valve 5 under,

[0025] Water tank 6 is arranged at the outside of test platform 1, and the water outlet of water tank 6 is communicated with first pipeline 7, and piston pump 8, overflow valve 9 and pressure gauge 10 are connected on the surface of first pipeline 7 respectively, and the water outlet of first pipeline 7 is communicated with drain gate 11, and the water outlet of overflow valve 9 is communicated with third pipeline 14, and the water outlet of third pipeline 14 is communicated with the water inlet of water tank 6,

[0026] Second pipeline 12 is arranged on the surface of first pipeline 7, and second pipeline 12 is communicated with the water inlet of test platform 1 and the surface of first pipeline 7 respectively, and isolation door 13 is connected on the surface of second pipeline 12. When carrying out tightness test to test valve 5, first fill water tank 6 with water, then place test valve 5 on test platform 1 according to the valve installation corresponding sealing washer 4 of different model size, then use rotary handle 3 to adjust the position of screw rod 2, make sealing washer 4 and test valve 5 fixed, open isolation door 13 after test valve 5 is fixed, then set the pressure of overflow valve 9, adjust test pressure in this way, complete and start piston pump 8 and carry out pressure test, make the water in water tank 6 along first pipeline 7 and second pipeline 12 into test platform 1, and carry out tightness test to test valve 5, when reaching test pressure, overflow valve 9 is opened automatically and flows back, and the excessive water flows back to water tank 6 along third pipeline 14, maintain pressure stability by the cooperation of piston pump 8 and overflow valve 9, carry out pressure test, stop piston pump 8 operation after test, and discharge the water storage through drain gate 11. On the one hand, not only can water be recycled, meet environmental protection requirement, also reduce the cost required by test, on the other hand, can replace sealing washer 4 according to the size of test valve 5, improve the applicability of the device.

[0027] Please refer to Figure 2The sealing gasket 4 is provided in two groups on the water inlet end and the screw rod 2 of the test platform 1. The sealing gasket 4 prevents leakage at the water inlet end of the test platform 1. The test valve 5 is tightly combined with the surface of the sealing gasket 4. The sealing gasket 4 is circular in design. The sealing gasket 4 ensures the sealing of the end of the test valve 5 and prevents leakage. The upper surface of the test platform 1 is provided with a threaded hole. The inner wall of the threaded hole is provided with internal threads. The end of the screw rod 2 extends downward through the threaded hole. The screw rod 2 can be lifted along the threaded hole to prevent deviation of the screw rod 2 during movement. The outer surface of the screw rod 2 is provided with external threads. The screw rod 2 is threadedly connected with the threaded hole. The screw rod 2 is rotated to move up and down along the threaded hole according to the rotation direction.

[0028] Please refer to Figure 1 The outer surface of the first pipeline 7 is provided with a water outlet hole. The water outlet hole is in communication with the water inlet end of the second pipeline 12. Water in the first pipeline 7 can flow into the second pipeline 12.

[0029] In this scheme, when the test valve 5 is subjected to a tightness test, the water tank 6 is first filled with water. The test valve 5 is placed on the test platform 1. The sealing gasket 4 is installed according to the size of the valve. The position of the screw rod 2 is adjusted using the rotating handle 3 to fix the sealing gasket 4 and the test valve 5. After the test valve 5 is fixed, the isolation door 13 is opened. The pressure of the overflow valve 9 is set to adjust the test pressure. After completion, the piston pump 8 is started to perform a pressure test. The water in the water tank 6 flows along the first pipeline 7 and the second pipeline 12 into the test platform 1 to test the tightness of the test valve 5. When the test pressure is reached, the overflow valve 9 is automatically opened to return the excess water to the water tank 6 through the third pipeline 14. The pressure is maintained stable by the cooperation of the piston pump 8 and the overflow valve 9. When the test is completed, the piston pump 8 is stopped, and the stored water is discharged through the water drain door 11.

[0030] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0031] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A valve tightness testing device, characterized by, Include: Test platform (1), and set to the upper surface of the screw (2), and the surface of the screw (2) is installed with rotating handle (3), and the bottom of the screw (2) is provided with sealing pad (4), and the lower part of the sealing pad (4) is provided with test valve (5); Water tank (6) is arranged outside the test platform (1), and the water outlet end of the water tank (6) is communicated with the first pipeline (7), and the surface of the first pipeline (7) is respectively connected with the piston pump (8), the overflow valve (9) and the pressure gauge (10), and the water outlet end of the first pipeline (7) is communicated with the drain door (11), and the water outlet end of the overflow valve (9) is communicated with the third pipeline (14), and the water outlet end of the third pipeline (14) is communicated with the water inlet end of the water tank (6); The second pipeline (12) is arranged on the surface of the first pipeline (7), and the second pipeline (12) is communicated with the water inlet end of the test platform (1) and the surface of the first pipeline (7) respectively, and the isolation door (13) is connected to the surface of the second pipeline (12).

2. The valve tightness testing device according to claim 1, characterized in that: The number of sealing pads (4) is two groups, and the sealing pads (4) are arranged at the water inlet end of the test platform (1) and the screw (2) respectively.

3. A valve tightness testing device according to claim 2, characterized in that: The two ends of the test valve (5) are respectively closely combined with the surface of the sealing pad (4), and the sealing pad (4) is designed as a whole circular.

4. The valve tightness testing device according to claim 1, characterized in that: The upper surface of the test platform (1) is provided with a threaded hole, and the inner wall of the threaded hole is provided with an internal thread, and the end of the screw (2) extends downward through the threaded hole.

5. A valve tightness testing device according to claim 4, characterized in that: The outer surface of the screw (2) is provided with an external thread, and the screw (2) is threadedly connected with the threaded hole.

6. The valve tightness testing device according to claim 1, characterized in that: The outer surface of the first pipeline (7) is provided with a water outlet hole, and the water outlet hole is communicated with the water inlet end of the second pipeline (12).

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