Clamping mechanism for detecting sealing performance of valve

Abstract

The utility model discloses a clamping mechanism for detecting the sealing performance of a valve, which achieves the purpose of simply, conveniently and safely carrying out a sealing test on the valve. A jack (4) is arranged on a base plate (1), an upward extending shaft of the jack (4) is fixedly connected with a jacking plate (6), a first sealing rubber mat (7) is arranged on the jacking plate (6), L-shaped liquid discharging pipes (12) are arranged in through holes where two corresponding liquid discharging pipes penetrate, and a second sealing rubber mat (8) is arranged on the lower bottom face of a top plate (3). The second sealing rubber mat (8) and the first sealing rubber mat are correspondingly arranged up and down, a liquid inlet vertical pipe is arranged in the liquid inlet pipe penetrating through the through hole, the upper end of the liquid inlet vertical pipe is communicated with a pressurizing liquid inlet horizontal pipe (9), the left end of the pressurizing liquid inlet horizontal pipe is provided with a pressurizing pump interface end (10), and a detected valve is arranged between the first sealing rubber mat (7) and the second sealing rubber mat (8); the valve can be conveniently and rapidly sealed and detected.

Description

Technical Field

[0001] The utility model relates to the technical field of valve sealing performance detection, in particular to a clamping mechanism for detecting valve sealing performance. Background Art

[0002] Before valves leave the factory and are used, they need to undergo pressure tests and sealing tests according to specifications. The test medium is generally water, and the test methods are manual and mechanical. The manual method is to install a flange plug on one side of the valve and a flange pressure device on the other side. This method is cumbersome to operate; the mechanical pressure device adopts hydraulic clamping, pneumatic clamping or manual clamping, tightens both sides of the valve, and performs a pressure test on the inner cavity of the valve through the pressure holes on the device; the hydraulic clamping type is generally equipped with an oil station and a pressure water pump, which is easy to operate, but the equipment procurement cost is high, and is generally used for factory inspection by valve manufacturers; the pneumatic clamping type requires an external air source and is suitable for use in fixed places; the manual clamping type provides clamping force through a screw rod and a hand wheel. The equipment is light, but when clamping, it needs to be manually operated with an F wrench, which is easy to generate lateral force, causing the entire device to shift and deflect, easily tip over, and cause mechanical injury accidents. Summary of the invention

[0003] The utility model provides a clamping mechanism for detecting the sealing performance of a valve, achieving the purpose of simply and safely performing a sealing test on the valve.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A clamping mechanism for detecting the sealing performance of a valve comprises a base plate, a top plate and a jack, wherein the base plate and the top plate are parallel to each other and are arranged correspondingly up and down, four gantry columns are arranged between the base plate and the top plate, the jack is arranged on the base plate, a lifting plate is fixedly connected to an upwardly extending shaft of the jack, a first sealing rubber pad is arranged on the lifting plate, a drain pipe passing through hole is arranged on the lifting plate and the first sealing rubber pad, an L-shaped drain pipe is arranged in the corresponding two drain pipe passing through holes, and a second emptying ball valve is arranged on the horizontal pipe of the L-shaped drain pipe; a second sealing rubber pad is arranged on the lower bottom surface of the top plate, and the second sealing rubber pad is fixedly connected to the upwardly extending shaft of the jack, and a first sealing rubber pad is arranged on the lifting plate and the first sealing rubber pad. The sealing pad and the first sealing pad are arranged correspondingly up and down. The second sealing pad and the top plate are both provided with a liquid inlet pipe passing through a through hole. A liquid inlet riser is arranged in the liquid inlet pipe passing through the through hole. The upper end of the liquid inlet riser is connected with a pressurized liquid inlet horizontal pipe. The pressurized liquid inlet horizontal pipe is arranged on the top surface of the top plate. A pressurized pump interface end is arranged at the left end of the pressurized liquid inlet horizontal pipe, and a first drain ball valve is arranged at the right end of the pressurized liquid inlet horizontal pipe. A detected valve is arranged between the first sealing pad and the second sealing pad, the liquid inlet of the detected valve is top-connected to the second sealing pad, and the liquid outlet of the detected valve is top-connected to the first sealing pad.

[0006] A lower annular groove is arranged on the top surface of the jacking plate, a lower sealing ring is arranged in the lower annular groove, and a first sealing rubber pad is arranged on the lower sealing ring; an upper annular groove is arranged on the lower bottom surface of the top plate, an upper sealing ring is arranged in the upper annular groove, and a second sealing rubber pad is connected to the upper sealing ring; a pressure gauge is connected to the jack; a rib plate is arranged between the lower bottom surface of the jacking plate and the output shaft of the jack.

[0007] The beneficial effects of the utility model are as follows: (i) the jack fixedly installed on the upper surface of the base plate solves the problem that the traditional method of using a hand wheel to clamp the valve is prone to shaking due to excessive force. At the same time, the jack also overcomes the problem of increasing the cost of using an oil station. The first sealing pad installed on the upper surface of the jacking plate and the second sealing pad installed on the lower surface of the top plate facilitate the first sealing pad and the second sealing pad to cooperate to clamp and seal the two ports of the valve when the telescopic end of the jack moves up with the jacking plate. At the same time, the pressurizing mechanism arranged on the top plate and the drainage mechanism arranged on the jacking plate facilitate the pressure test of the valve by the pressurizing mechanism when conducting a sealing test, and the drainage mechanism is used to drain the valve, which is convenient for conducting a sealing test on the valve; (ii) the pressurizing mechanism is composed of a pressure inlet horizontal pipe, a pressure pump joint and a first emptying ball valve, and the pressure pump joint and the first emptying ball valve are respectively installed at the two ends of the pressure inlet horizontal pipe, and the pressure inlet horizontal pipe is a "T"-shaped structure, and the third end of the pressure inlet horizontal pipe is inserted into The hole in the middle of the second sealing pad is convenient for the second sealing pad to seal one end of the valve, and the pressure inlet horizontal pipe is connected to the pressure pump joint to pressurize the valve to test the sealing performance; (iii) a discharge mechanism composed of a discharge pipe and a second emptying ball valve, and the discharge pipe is arranged on the jacking plate, the discharge pipe is an "L"-shaped structure, and at the same time, a second emptying ball valve is installed at one end of the discharge pipe, and the other end of the discharge pipe is installed in the hole in the middle of the first sealing pad, so that the valve can be emptied through the second emptying ball valve at the end of the discharge pipe. A pressure gauge for observing the clamping force is installed on the jack, so that the pressure gauge can detect the clamping force of the jack to avoid loose clamping when the valve is sealed, which is convenient for sealing detection of the valve; (iv) an annular groove is opened on the upper surface of the jacking plate and the lower surface of the top plate, and the surfaces of the first sealing pad and the second sealing pad are integrally formed with sealing rings, and the sealing rings are installed inside the annular groove, so that the first sealing pad is installed on the upper surface of the jacking plate and the second sealing pad is installed on the lower surface of the top plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0009] Figure 2 It is a structural schematic diagram of the sealing gasket of the utility model;

[0010] Figure 3 It is a schematic diagram of the structure of the pressure liquid inlet horizontal pipe 9 and the L-shaped liquid discharge pipe 12;

[0011] Figure 4 It is a cross-sectional structural diagram of some mechanisms of the utility model;

[0012] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0013] Figure numerals: 1. base plate; 2. gantry column; 3. top plate; 4. jack; 5. rib plate; 6. lifting plate; 7. first sealing rubber pad; 8. second sealing rubber pad; 9. pressure inlet horizontal pipe; 10. pressure pump interface end; 11. first drain ball valve; 12. drain pipe; 13. second drain ball valve; 14. pressure gauge; 15. sealing ring; 16. annular groove. DETAILED DESCRIPTION

[0014] The utility model is described in detail below with reference to the accompanying drawings:

[0015] A clamping mechanism for detecting the sealing performance of a valve comprises a base plate 1, a gantry column 2 and a top plate 3, wherein both ends of the gantry column 2 are welded between the base plate 1 and the top plate 3, a jack 4 is fixedly mounted on the upper surface of the base plate 1, a lifting plate 6 is welded to the telescopic end of the jack 4, and a rib plate 6 is further welded between the jack 4 and the lifting plate 6, a first sealing pad 7 is mounted on the upper surface of the lifting plate 6, a second sealing pad 8 is mounted on the lower surface of the top plate 3, and the second sealing pad 8 is located directly above the first sealing pad 7, a pressurizing mechanism is arranged on the top plate 3, and a drainage mechanism is arranged on the lifting plate 6.

[0016] The jack 4 fixedly mounted on the upper surface of the base plate 1 solves the problem that the traditional method of using a hand wheel to tighten the valve is prone to shaking due to excessive force on the rotating hand wheel device. At the same time, the jack 4 also overcomes the problem of increased cost of using an oil station. The first sealing pad 7 installed on the upper surface of the jacking plate 6 and the second sealing pad 8 installed on the lower surface of the top plate 3 facilitate the first sealing pad 7 and the second sealing pad 8 to clamp and seal the valve when the telescopic end of the jack 4 moves up with the jacking plate 6. The pressurizing mechanism arranged on the top plate 3 and the drainage mechanism arranged on the jacking plate 6 facilitate the pressurizing mechanism to seal the valve. A pressure test is performed during the inspection, and the drain mechanism is used to drain the valve, so as to facilitate the sealing inspection of the valve; the pressurizing mechanism includes a pressure inlet horizontal pipe 9 arranged on the top plate 3, the pressure inlet horizontal pipe 9 is a T-shaped structure, and the third end of the pressurizing pipe 9 is provided with a pressure pump interface end 10, one end of the pressure inlet horizontal pipe 9 is installed with a first drain ball valve 11, and the third end of the pressure inlet horizontal pipe 9 is inserted into the hole opened in the middle of the second sealing gasket 8; when the second sealing gasket 8 seals one end of the valve, the pressure inlet horizontal pipe 9 pressurizes the valve with a liquid pump connected to the pressure pump interface end 10 to inspect the sealing performance.

[0017] The drain mechanism includes a drain pipe 12 arranged on the jacking plate 6. The drain pipe 12 is an L-shaped structure. A second drain ball valve 13 is installed at one end of the drain pipe 12. The other end of the drain pipe 12 passes through the hole opened in the middle of the first sealing pad 7. The second drain ball valve 13 facilitates draining the liquid through the second drain ball valve 13 at the end of the drain pipe 12. A pressure gauge 14 for observing the clamping force is installed on the jack 4, which is convenient for the pressure gauge 14 to detect the clamping force of the jack 4 to avoid loose clamping when the valve is sealed. It is convenient to perform sealing detection on the valve.

[0018] When in use, place the valve on the first sealing pad 7. When the telescopic end of the jack 4 moves up with the first sealing pad 7 through the jacking plate 6, the two ends of the valve are sealed by the first sealing pad 7 and the second sealing pad 8. Close the first drain ball valve 11 and the second drain ball valve 13. First, open the valve to be tested. The liquid pump injects liquid into the valve by pressurizing the liquid inlet horizontal pipe 9. The pressure gauge 14 is used to observe the clamping force of the jack 4. By observing whether there is leakage, it is determined whether the two ends of the valve and the first sealing pad 7 and the second sealing pad 8 are sealed. When there is no leakage, close the valve and open the second drain ball valve 13. At this time, the empty liquid at the bottom of the valve is discharged through the second drain ball valve 13. Close the second drain ball valve 13 and determine the sealing performance of the valve by observing whether there is leakage.

Claims

1. A clamping mechanism for detecting valve sealing performance, comprising a base plate (1), a top plate (3) and a jack (4), wherein the base plate (1) and the top plate (3) are parallel to each other and arranged correspondingly up and down, and four gantry columns (2) are arranged between the base plate (1) and the top plate (3), characterized in that: The jack (4) is arranged on the base plate (1), a lifting plate (6) is fixedly connected to the upwardly extending shaft of the jack (4), a first sealing rubber pad (7) is arranged on the lifting plate (6), a drainage pipe through-hole is arranged on the lifting plate (6) and the first sealing rubber pad (7), an L-shaped drainage pipe (12) is arranged in the corresponding two drainage pipe through-holes, and a second emptying ball valve (13) is arranged on the horizontal pipe of the L-shaped drainage pipe (12); a second sealing rubber pad (8) is arranged on the lower bottom surface of the top plate (3), the second sealing rubber pad (8) and the first sealing rubber pad (7) are arranged in correspondence with each other in the upper and lower parts, and the second sealing rubber pad (8) is provided with a plurality of sealing rubber pads (13). A liquid inlet pipe passing through hole is provided on the upper and top plates (3), a liquid inlet riser is provided in the liquid inlet pipe passing through hole, the upper end of the liquid inlet riser is connected with a pressure liquid inlet horizontal pipe (9), the pressure liquid inlet horizontal pipe is provided on the top surface of the top plate (3), a pressure pump interface end (10) is provided at the left end of the pressure liquid inlet horizontal pipe (9), and a first emptying ball valve (11) is provided at the right end of the pressure liquid inlet horizontal pipe (9); a valve to be tested is provided between the first sealing rubber pad (7) and the second sealing rubber pad (8), the liquid inlet of the valve to be tested is top-connected to the second sealing rubber pad (8), and the liquid outlet of the valve to be tested is top-connected to the first sealing rubber pad (7).

2. A clamping mechanism for detecting valve sealing performance according to claim 1, characterized in that: A lower annular groove (16) is provided on the top surface of the jacking plate (6), a lower sealing ring is provided in the lower annular groove (16), and a first sealing rubber pad (7) is provided on the lower sealing ring; an upper annular groove is provided on the lower bottom surface of the top plate (3), an upper sealing ring (15) is provided in the upper annular groove, and a second sealing rubber pad (8) is connected to the upper sealing ring (15); a pressure gauge (14) is connected to the jack (4); and a rib plate (5) is provided between the lower bottom surface of the jacking plate (6) and the output shaft of the jack (4).

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