CN218937759U

CN218937759U - Valve packing performance testing device

Info

Publication number: CN218937759U
Application number: CN202222830676.6U
Authority: CN
Inventors: 韩泽海; 俞健成
Original assignee: Dhv Valve & Foundry Suzhou Co ltd
Current assignee: Dhv Valve & Foundry Suzhou Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-04-28
Anticipated expiration: 2032-10-26

Abstract

The utility model relates to a valve packing performance testing device which comprises an air sealing component and a base component which are arranged from top to bottom, wherein the base component provides support for the air sealing component, the base component is in sealing connection with the air sealing component through an O-shaped ring, a valve rod is arranged in a penetrating way between the base component and the air sealing component, a valve rod nut and a connecting plate are sequentially arranged on the upper side of the valve rod in a penetrating way, the bottom end of the valve rod is connected with an anti-rotation clamping sleeve, the anti-rotation clamping sleeve is clamped with an abutting groove of the base component, the top end of the base component is fixedly connected with a supporting plate, the connecting plate is fixedly connected with the supporting plate through a first screw rod and a first nut, the top end of the connecting plate is fixedly connected with a gear box, and the valve rod nut is in transmission connection with the gear box through gears. The valve packing performance testing device has the advantages of testing packing seals of the same size and series, improving testing universality, improving testing precision and the like.

Description

Valve packing performance testing device

Technical Field

The utility model relates to the technical field of valve testing devices, in particular to a valve packing performance testing device.

Background

At present, the filler has certain plasticity, can generate certain radial pressure under the action of axial pressure, has the capability of resisting temperature change, and has enough floating elasticity. Along with the popularization of low leakage requirements in the field of valves, various valve filler manufacturers release low leakage special fillers, but each property is different, and the design requirements on a valve rod sealing system of the valve are also different, so that inconvenience is brought to the valve manufacturers when the valve rod sealing system is designed, and the properties of the fillers of different manufacturers are tested.

For this reason we have developed a valve packing performance testing device to solve the above problems.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a valve packing performance testing device which has the advantages of testing packing seals of the same size and the same series, improving testing universality, improving testing precision and the like.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a valve packing capability test device, includes a gas seal assembly and a base subassembly that top-down set up, the base subassembly with gas seal assembly passes through O shape circle sealing connection to wear to establish a valve rod, the valve rod is located gas seal assembly's upside wears to establish a connecting plate, and a rotation-proof cutting ferrule is connected to the bottom, rotation-proof cutting ferrule with base subassembly joint, a backup pad is connected fixedly in base subassembly's top, the connecting plate with the backup pad passes through first screw rod fixed connection, first screw rod with the connecting plate passes through first nut fixed connection, a gear box is connected fixedly in the top of connecting plate, the top department of valve rod is equipped with a valve rod nut, the valve rod nut with the gear box rotates to be connected.

Preferably, the airtight component comprises an airtight device, the center of the airtight device is penetrated with the valve rod, the valve rod is sequentially penetrated with a backing ring, test filler, a pressing sleeve and a pressing plate from bottom to top, and the pressing plate is fixedly connected with the airtight device through an upright post.

Preferably, a groove is arranged at the center of the top end of the air sealing device, and the groove is sequentially crimped with the backing ring, the test filler and the pressing sleeve.

Preferably, a first conical surface is arranged at the top end of the pressing sleeve, a second conical surface is arranged at the bottom end of the pressing plate, and the first conical surface is abutted with the second conical surface.

Preferably, a third conical surface is arranged at the inner top end of the pressing sleeve, and a cylindrical surface is arranged at the inner bottom end of the pressing sleeve and is in press connection with the valve rod.

Preferably, the base assembly is provided with a plurality of supporting feet, a blind plate, a gasket and a base from bottom to top in sequence, and the supporting feet, the blind plate and the base are fixedly connected through a second screw rod and a second nut.

Preferably, an abutting groove is formed in the inner wall of the base, and the abutting groove is clamped with the anti-rotation clamping sleeve.

Preferably, a U-shaped groove is arranged at the top end of the abutting groove, and the U-shaped groove is fixedly connected with the air sealing device.

Preferably, an annular groove is arranged at the bottom end of the U-shaped groove, and the annular groove is sleeved with the O-shaped ring.

Preferably, an external thread is arranged on the outer wall of the U-shaped groove, an internal thread is arranged at the center of the supporting plate, and the external thread is fixedly connected with the internal thread.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the valve packing performance testing device can test the performance of packing of different manufacturers; the performance parameters of fillers with different sizes can be tested by replacing the air sealing device; the backup pad is fixed as an organic whole structure with the connecting plate, improves the stability of valve rod, improves the precision of test.

Drawings

FIG. 1 is a schematic structural diagram of a valve packing performance testing device according to the present utility model.

Fig. 2 is an enlarged view of the utility model at a in fig. 1.

Fig. 3 is an enlarged view of the utility model at B in fig. 1.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings and specific examples.

In fig. 1 to 3, a valve packing performance testing device comprises an air sealing assembly and a base assembly which are arranged from top to bottom, wherein a connecting plate 18 is arranged on the upper side frame of the air sealing assembly, the top end of the connecting plate 18 is fixedly connected with a gear box 21, and the outer side of the top end of the base assembly is fixedly connected with a supporting plate 9.

The base assembly is sealingly connected to the airtight assembly by means of an O-ring 8 and a valve stem 17 is centrally provided. The valve rod 17 is located the upside of airtight subassembly and wears to establish a connecting plate 18 to a prevent changeing cutting ferrule 7 is connected to the bottom, prevents changeing cutting ferrule 7 and base subassembly joint, and the base subassembly is equipped with a base 5, and the inner wall of base 5 is equipped with butt groove 51, butt groove 51 and prevent changeing cutting ferrule 7 joint. The top end of the base assembly is fixedly connected with a supporting plate 9, a connecting plate 18 is fixedly connected with the supporting plate 9 through a first screw rod 16, and the first screw rod 16 is fixedly connected with the connecting plate 18 and the supporting plate 9 through first nuts 19 respectively. A valve rod nut 20 is arranged at the top end of the valve rod 17, the valve rod nut 20 is provided with external teeth 201, and the external teeth 201 are rotationally connected with the gear box 21.

In order to detect the amount of packing compression, packing face pressure, low leakage data, the airtight assembly comprises an airtight sealing device 10. The center of the air sealing device 10 is penetrated with a valve rod 17, the valve rod 17 is sequentially penetrated with a backing ring 11, a test filler 100, a pressing sleeve 12 and a pressing plate 13 from bottom to top, and the pressing plate 13 is fixedly connected with the air sealing device 10 through a stand column 15.

A groove 101 is arranged at the center of the top end of the air sealing device 10, and the groove 101 is sequentially pressed with a backing ring 11, a test packing 100 and a pressing sleeve 12, namely, the pressing sleeve 12 presses the test packing 100, the backing ring 11 and the pressing sleeve into the groove 101. The recess 101 of the gas seal 10 is selected based on the size of the filler material being tested. The packing of same size, different materials can all carry out the pressure seal test, improves valve packing capability test device's commonality.

To compress the test packing 100, a first conical surface 121 is provided at the top end of the pressure jacket 12, a third conical surface 122 is provided at the inner top end of the pressure jacket 12, and a cylindrical surface 123 is provided at the inner bottom end, and the cylindrical surface 123 is crimped with the valve stem 17. The bottom end of the pressing plate 13 is provided with a second conical surface 131, and the first conical surface 121 is abutted against the second conical surface 131. By locking the third nut 14, the second tapered surface 131 of the pressing plate 13 is pressed against the first tapered surface 121 of the pressing sleeve 12 to press the test filler 100.

In order to provide support for the gas sealing device 10 and limit the bottom end of the valve rod, the base assembly is sequentially provided with a plurality of supporting feet 1, a blind plate 3, a gasket 4 and a base 5 from bottom to top, and the supporting feet 1, the blind plate 3 and the base 5 are fixedly connected through a second screw rod 2 and a second nut 6. A U-shaped groove 52 is provided at the top end of the abutting groove 51, a ring groove 55 is provided at the bottom end of the U-shaped groove 52, an external thread 53 is provided on the outer wall of the U-shaped groove 52, and the U-shaped groove 52 is fixedly connected with the airtight device 10. The ring groove 55 is sleeved with an O-shaped ring 8. An internal thread 91 is arranged at the center of the supporting plate 9, and the external thread 53 is fixedly connected with the internal thread 91.

The supporting leg 1, the blind plate 3 and the gasket 4 are connected with the base 5 through the second screw rod 2 and the second nut 6 and screwed. The support plate 9 is screwed into the base 5. The anti-rotation clamping sleeve 7 is sleeved into the valve rod 17 and then is arranged in the base 5. After the O-ring 8 is fitted into the base 5, the airtight device 10 is screwed into the base 5. The grommet 11, the test packing 100, and the press sleeve 12 are sequentially put into the airtight device 10, the press plate 13 is installed, and connected and screwed by the column 15 and the third nut 14. The first screw 16 is fitted into the support plate 9, the connection plate 18 is fitted into the first screw 16, and then the first screw 16 is screwed up and down with the first nut 19. After screwing the stem nut 20 into the stem 17, a gear box 21 is installed.

The foregoing is merely a specific application example of the present utility model, and the protection scope of the present utility model is not limited in any way. All technical schemes formed by equivalent transformation or equivalent substitution fall within the protection scope of the utility model.

Claims

1. A valve packing capability test device, its characterized in that: including top-down setting's an air seal assembly and a base subassembly, the base subassembly with air seal assembly passes through O shape circle (8) sealing connection to wear to establish a valve rod (17), valve rod (17) are located air seal assembly's upside wears to establish a connecting plate (18), and a rotation-proof cutting ferrule (7) are connected to the bottom, rotation-proof cutting ferrule (7) with base subassembly joint, a backup pad (9) are connected fixedly to base subassembly's top, connecting plate (18) with backup pad (9) pass through first screw rod (16) fixed connection, first screw rod (16) with connecting plate (18) pass through first nut (19) fixed connection, a gear box (21) is connected fixedly to the top of connecting plate (18), the top department of valve rod (17) is equipped with a valve rod nut (20), valve rod nut (20) with gear box (21) rotate and are connected.

2. The valve packing performance testing device according to claim 1, wherein the air sealing assembly comprises an air sealing device (10), the center of the air sealing device (10) is provided with the valve rod (17) in a penetrating mode, the valve rod (17) is provided with a backing ring (11), a testing packing (100), a pressing sleeve (12) and a pressing plate (13) in a penetrating mode from bottom to top in sequence, and the pressing plate (13) is fixedly connected with the air sealing device (10) through a stand column (15).

3. The valve packing performance testing device according to claim 2, wherein a groove (101) is arranged at the top center position of the air sealing device (10), and the groove (101) is sequentially pressed with the backing ring (11), the test packing (100) and the pressing sleeve (12).

4. Valve packing performance testing device according to claim 2, characterized in that a first conical surface (121) is arranged at the top end of the pressing sleeve (12), a second conical surface (131) is arranged at the bottom end of the pressing plate (13), and the first conical surface (121) is abutted with the second conical surface (131).

5. Valve packing performance testing device according to claim 2, wherein the inner top end of the pressure sleeve (12) is provided with a third conical surface (122) and the inner bottom end is provided with a cylindrical surface (123), the cylindrical surface (123) being in pressure connection with the valve stem (17).

6. The valve packing performance testing device according to claim 2, wherein the base assembly is provided with a plurality of supporting feet (1), a blind plate (3), a gasket (4) and a base (5) from bottom to top in sequence, and the supporting feet (1), the blind plate (3) and the base (5) are fixedly connected through a second screw rod (2) and a second nut (6).

7. The valve packing performance testing device according to claim 6, wherein an abutting groove (51) is formed in the inner wall of the base (5), and the abutting groove (51) is clamped with the anti-rotation clamping sleeve (7).

8. Valve packing performance testing device according to claim 7, characterized in that a U-shaped groove (52) is provided at the top end of the abutment groove (51), the U-shaped groove (52) being fixedly connected with the gas seal device (10).

9. Valve packing performance testing device according to claim 8, characterized in that a ring groove (55) is provided at the bottom end of the U-shaped groove (52), the ring groove (55) being sleeved with the O-ring (8).

10. Valve packing performance testing device according to claim 8, characterized in that the outer wall of the U-shaped groove (52) is provided with an external thread (53), the central position of the support plate (9) is provided with an internal thread (91), and the external thread (53) is fixedly connected with the internal thread (91).