Valve with double sealing pairs

Abstract

The utility model relates to the technical field of valves, and discloses a valve with double sealing pairs, which comprises a valve body, a valve core arranged in the valve body, a valve rod arranged at the top end of the valve core, a rotating component arranged at the top end of the valve rod, end covers arranged at two ends of the valve body, and clamping seats arranged in the end covers. A first sealing ring for sealing the valve element is connected into the clamping base in a clamped mode, and a first sealing gasket for sealing the end cover is arranged on one side of the first sealing ring. The first sealing rings can be limited through the clamping base, double sealing of the valve element can be achieved through the two first sealing rings, the first sealing pad can seal the end cover, the end cover can clamp the first sealing pad after being fixed and can extrude the first sealing ring, the first sealing ring can be tightly attached to the valve element, the attaching degree between the first sealing ring and the valve element is improved, and the valve element is safe, reliable and not prone to leakage. And the sealing ring I can be taken out from the clamping seat by opening the end cover, so that the sealing ring I is convenient to disassemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve with double sealing pairs. Background Art

[0002] Valves are control components in fluid conveying systems, with functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. From the simplest shut-off valve to the various valves used in extremely complex automatic control systems, there are quite a variety of varieties and specifications. They can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.

[0003] Its application number "202122555362.5" discloses a "valve with a double sealing pair", which "includes a main body, a ramp is provided at one end of the main body, an internal thread is provided at the inner end of the main body, a ball valve is movably connected to the middle end of the internal part of the main body, a through hole is provided inside the ball valve, the top of the ball valve is fixedly connected to a toothed disk, the upper surface of the toothed disk is fixedly connected to a limiting column, the middle end of the upper surface of the limiting column is fixedly connected to a fixing rod, the top of the fixing rod passes through the main body and is fixedly connected to a pointer, the middle part of the upper end of the main body is fixedly connected to an angle disk, the inside of the angle disk is movably connected to a pointer, and the inner bottom end of the angle disk is fixedly connected to a scale block." The utility model is that the slope and the wrench are adapted to each other and the internal thread can facilitate the connection of the product to the pipeline. The handle and the hand plate are movably connected, and the handle can be used to make it more convenient to rotate the hand plate. The rotation of the hand plate can drive the rotating rod to rotate, thereby causing the gear to rotate and engage with the gear plate, thereby realizing the rotation of the gear plate, thereby realizing the rotation of the ball valve fixedly connected to the gear plate, thereby allowing water to pass through the through hole, realizing the opening of the product, and the operation is very convenient. The positioning blocks inside the multiple spring holes can clamp the spring to prevent it from falling off, and the spring and the sealing ring at the other end cooperate with each other and adapt to the ball valve to seal the gap between the ball valve and the main body. A sealing ring is added to the sealing of the ball valve to give it a double seal, thereby achieving a better sealing effect.

[0004] However, the above method still has the following defects: the use of a sealing ring can achieve double sealing of the ball valve, but a clamping spring is required to support the sealing ring, which reduces the fit between the sealing ring and the main body, easily causing water to leak through the toothed disc and gear, and the sealing ring is encapsulated in the main body, making it difficult to disassemble and replace once it ages. Utility Model Content

[0005] In view of the deficiencies of the prior art, the present invention provides a valve with a double sealing pair, which has the advantages of being less prone to leakage and convenient to disassemble and replace, and solves the problems raised by the above-mentioned background technology.

[0006] The utility model provides the following technical solution: a valve with a double sealing pair, comprising a valve body, an internal valve core of the valve body, a valve stem provided at the top end of the valve core, a rotating assembly provided at the top end of the valve stem, end covers provided at both ends of the valve body, a retaining seat provided inside the end cover, a sealing ring 1 for sealing the valve core provided in a snap-fit ​​connection inside the retaining seat, a sealing gasket 1 for sealing the end cover provided on one side of the sealing ring 1, a connecting assembly provided on one side of the end cover, a round tube provided at the top end of the valve body, a sealing ring 2 for sealing the valve stem provided inside the round tube, and a pressure cover provided on the top end of the round tube.

[0007] As an optimal technical solution of the present invention, positioning rings are welded on both sides of the valve body, and a connecting ring is welded on the other side of the end cover. One side of the connecting ring is fixedly connected to one side of the positioning ring by bolts, and the sealing gasket is snap-connected to one side of the connecting ring.

[0008] As an optimal technical solution of the present invention, the connecting assembly includes a sealing plate, a connecting pipe and a flange. One side of the sealing plate is welded to one side of the end cover, a connecting pipe is welded to the middle of the end cover, and one end of the connecting pipe is welded to the flange.

[0009] As an optimal technical solution of the present invention, the bottom end of the circular tube is welded to the middle of the top end of the valve body, a support ring is welded to the top end of the circular tube, and the bottom end of the pressure cover is fixedly connected to the top end of the support ring by bolts.

[0010] As a preferred technical solution of the present invention, the second sealing ring is sleeved on the surface of the valve stem, and a second sealing gasket is fixed on the top of the second sealing ring, and the second sealing gasket is snap-connected with the top of the support ring.

[0011] As an optimal technical solution of the present invention, the rotating assembly includes a handwheel, a square groove is opened in the middle of the handwheel, a square block is snap-connected inside the square groove, the bottom end of the square block is fixedly connected to the top of the valve stem, a screw is fixed in the middle of the top of the block, and the screw is threadedly connected to a nut.

[0012] As a preferred technical solution of the present invention, a rod groove is provided in the middle of the gland and the middle of the top end of the valve body, and the valve stem is inserted and connected with the rod groove.

[0013] As a preferred technical solution of the present invention, an angle scale is fixedly provided on the top of the gland, the angle scale is coaxial with the valve stem, and a pointing groove for pointing the angle scale is provided on the surface of the valve stem.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The sealing ring 1 can be limited by the card seat, and the two sealing rings 1 can realize double sealing of the valve core. The sealing gasket 1 can seal the end cover. After the end cover is fixed, it can clamp the sealing gasket 1 and squeeze the sealing ring 1 to make it fit the valve core tightly, thereby improving the fit between the sealing ring 1 and the valve core. It is safe, reliable and not easy to leak. By opening the end cover, the sealing ring 1 can be taken out from the card seat, which is convenient for disassembly and replacement.

[0016] 2. The valve body can be connected to the pipeline through the connecting assembly, the valve stem can be rotated through the rotating assembly, the sealing ring 2 can be limited by the pressure cap, and the sealing ring 2 can seal the valve stem to prevent a gap between the valve stem and the round tube from causing water seepage into the round tube. By disassembling the rotating assembly and the pressure cap in turn, the sealing ring 2 can be taken out from the round tube, which is convenient for disassembly and replacement of the sealing ring 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 This is a schematic structural diagram of a sealing ring of the utility model;

[0020] Figure 4 This is a schematic structural diagram of the circular tube of the utility model;

[0021] Figure 5 This is a schematic diagram of the exploded structure of the rotating assembly of the utility model.

[0022] In the figure: 1. Valve body; 2. Valve core; 3. End cover; 4. Positioning ring; 5. Connecting ring; 6. Clamping seat; 7. Sealing ring 1; 8. Sealing gasket 1; 9. Connecting assembly; 901. Sealing plate; 902. Connecting pipe; 903. Flange; 10. Round pipe; 11. Valve stem; 12. Rotating assembly; 1201. Handwheel; 1202. Square groove; 1203. Block; 1204. Screw; 1205. Nut; 13. Support ring; 14. Pressure cap; 15. Sealing ring 2; 16. Sealing gasket 2; 17. Pointing groove; 18. Angle dial; 19. Rod groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1 to 5 , a valve with a double sealing pair, including a valve body 1, an internal valve core 2 of the valve body 1, a valve stem 11 is provided at the top of the valve core 2, a rotating component 12 is provided at the top of the valve stem 11, the valve stem 11 can be rotated by the rotating component 12, and the valve core 2 can be controlled. End covers 3 are provided at both ends of the valve body 1, a card seat 6 is provided inside the end cover 3, and a sealing ring 7 is connected to the internal card seat 6 for sealing the valve core 2. The sealing ring 7 can be limited by the card seat 6. The two sealing rings 7 can achieve double sealing of the valve core 2. One side of the sealing ring 7 is provided There is a sealing gasket 8 for sealing the end cover 3. The end cover 3 can be sealed by the sealing gasket 8. By opening the end cover 3, the sealing ring 7 can be taken out, disassembled and replaced. A connecting component 9 is provided on one side of the end cover 3. The valve body 1 can be connected to the pipeline through the connecting component 9. The top of the valve body 1 is provided with a circular tube 10. The inside of the circular tube 10 is provided with a sealing ring 2 15 for sealing the valve stem 11. The top of the circular tube 10 is provided with a pressure cap 14. The pressure cap 14 can limit the sealing ring 2 15, and the sealing ring 2 15 can seal the valve stem 11.

[0025] In this embodiment, preferably, the connecting assembly 9 includes a sealing plate 901, a connecting pipe 902 and a flange 903. One side of the sealing plate 901 is welded to one side of the end cover 3. The middle part of the end cover 3 is welded with a connecting pipe 902. One end of the connecting pipe 902 is welded with a flange 903. The connecting pipe 902 can be connected to the pipeline through the flange 903, which facilitates the installation and removal of the valve body 1.

[0026] In this embodiment, preferably, the rotating assembly 12 includes a handwheel 1201, a square groove 1202 is opened in the middle of the handwheel 1201, a block 1203 is engaged and connected inside the square groove 1202, the bottom end of the block 1203 is fixedly connected to the top of the valve stem 11, a screw 1204 is fixedly provided in the middle of the top of the block 1203, and the screw 1204 is threadedly connected to a nut 1205. The handwheel 1201 can be fixed by the screw 1204 and the nut 1205. The block 1203 and the square groove 1202 can ensure that the torque of the handwheel 1201 is transmitted to the valve stem 11. The handwheel 1201 can be disassembled by loosening the nut 1205.

[0027] In this embodiment, preferably, positioning rings 4 are welded on both sides of the valve body 1, and a connecting ring 5 is welded on the other side of the end cover 3. One side of the connecting ring 5 is fixedly connected to one side of the positioning ring 4 by a bolt, and a sealing gasket 8 is engaged with one side of the connecting ring 5. The end cover 3 can be fixed by the positioning ring 4 and the connecting ring 5, and the sealing gasket 8 can seal between the connecting ring 5 and the positioning ring 4.

[0028] In this embodiment, preferably, the bottom end of the round tube 10 is welded to the middle of the top of the valve body 1, and a support ring 13 is welded to the top of the round tube 10. The bottom end of the gland 14 is fixedly connected to the top of the support ring 13 by a bolt, and the sealing ring 15 is sleeved with the surface of the valve stem 11. The top of the sealing ring 15 is fixedly provided with a sealing gasket 16, and the sealing gasket 16 is engaged with the top of the support ring 13. The support ring 13 can limit the sealing gasket 16 and fix the gland 14. The sealing gasket 16 can be fixed. The support ring 13 and the pressure cover 14 are sealed, and a rod groove 19 is provided in the middle of the pressure cover 14 and the middle of the top of the valve body 1. The valve stem 11 is connected with the rod groove 19 through the pressure cover 14. An angle dial 18 is fixed on the top of the pressure cover 14. The angle dial 18 is coaxial with the valve stem 11. A pointing groove 17 is provided on the surface of the valve stem 11 to point to the angle dial 18. When the valve stem 11 is rotated, the valve stem 11 can point to the angle dial 18 through the pointing groove 17, so that the opening angle of the valve core 2 can be monitored.

[0029] When in use, first put the sealing ring 7 into the holder 6, then engage the sealing gasket 18 with the connecting ring 5, and then connect the connecting ring 5 with the positioning ring 4 by bolts to fix the end cover 3. After being fixed, the end cover 3 can clamp the sealing gasket 18 and squeeze the sealing ring 17 to make it fit tightly against the valve core 2. The two sealing rings 17 can achieve double sealing of the valve core 2, and the sealing gasket 18 can seal the end cover 3. Then, connect the connecting pipe 902 to the pipeline through the flange 903 of the connecting component 9, and install the valve body 1. Finally, rotate the valve stem 11 through the handwheel 1201 of the rotating component 12. The handwheel 1201 can transmit torque to the valve stem 11 through the block 1203 and the square groove 1202, so as to control the valve core 2. The flow rate can be adjusted during the rotation of the valve core 2, and the opening angle of the valve core 2 can be monitored by pointing to the angle dial 18 through the pointing groove 17.

[0030] The pressure cover 14 at the top of the circular tube 10 can limit the sealing ring 2 15, and the sealing ring 2 15 can seal the valve stem 11 to prevent a gap between the valve stem 11 and the circular tube 10, which may cause water seepage into the circular tube 10. The sealing gasket 2 16 can seal between the pressure cover 14 and the support ring 13. When the sealing ring 1 7 and the sealing ring 2 15 age and need to be replaced, the sealing ring 2 15 can be taken out and replaced by loosening the nut 1205 of the rotating assembly 12, removing the handwheel 1201, and then disassembling the pressure cover 14. The staff opens the end cover 3 and takes out the sealing ring 1 7 from the holder 6. The sealing ring 1 7 can be replaced to ensure the normal use of the valve body 1.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve with a double sealing pair, comprising a valve body (1), characterized in that: The valve body (1) has an internal valve core (2), a valve stem (11) is provided at the top end of the valve core (2), a rotating assembly (12) is provided at the top end of the valve stem (11), end covers (3) are provided at both ends of the valve body (1), a holder (6) is provided inside the end cover (3), a sealing ring (7) for sealing the valve core (2) is connected to the inside of the holder (6), a sealing gasket (8) for sealing the end cover (3) is provided on one side of the sealing ring (7), a connecting assembly (9) is provided on one side of the end cover (3), a round tube (10) is provided at the top end of the valve body (1), a sealing ring (15) for sealing the valve stem (11) is provided inside the round tube (10), and a pressure cover (14) is provided at the top end of the round tube (10).

2. The valve with double sealing pairs according to claim 1, characterized in that: Positioning rings (4) are welded on both sides of the valve body (1), and a connecting ring (5) is welded on the other side of the end cover (3). One side of the connecting ring (5) is fixedly connected to one side of the positioning ring (4) by bolts, and the sealing gasket (8) is snap-fitted and connected to one side of the connecting ring (5).

3. The valve with double sealing pairs according to claim 1, characterized in that: The connecting assembly (9) comprises a sealing plate (901), a connecting pipe (902) and a flange (903); one side of the sealing plate (901) is welded to one side of the end cover (3); the middle part of the end cover (3) is welded with a connecting pipe (902); and one end of the connecting pipe (902) is welded with a flange (903).

4. The valve with double sealing pairs according to claim 1, characterized in that: The bottom end of the circular tube (10) is welded to the middle of the top end of the valve body (1), a support ring (13) is welded to the top end of the circular tube (10), and the bottom end of the gland (14) is fixedly connected to the top end of the support ring (13) by bolts.

5. The valve with double sealing pairs according to claim 4, characterized in that: The second sealing ring (15) is sleeved with the surface of the valve stem (11), and a second sealing gasket (16) is fixedly provided on the top of the second sealing ring (15), and the second sealing gasket (16) is snap-connected with the top of the support ring (13).

6. The valve with double sealing pairs according to claim 1, characterized in that: The rotating assembly (12) includes a handwheel (1201), a square groove (1202) is provided in the middle of the handwheel (1201), a square block (1203) is engaged and connected inside the square groove (1202), the bottom end of the square block (1203) is fixedly connected to the top end of the valve stem (11), a screw rod (1204) is fixedly provided in the middle of the top end of the square block (1203), and the screw rod (1204) is threadedly connected to a nut (1205).

7. The valve with double sealing pairs according to claim 1, characterized in that: A rod groove (19) is provided in the middle of the gland (14) and the middle of the top end of the valve body (1), and the valve stem (11) is connected to the rod groove (19) through insertion.

8. The valve with double sealing pairs according to claim 1, characterized in that: An angle scale (18) is fixedly provided on the top of the pressure cover (14), the angle scale (18) is coaxial with the valve stem (11), and a pointing groove (17) for pointing the angle scale (18) is provided on the surface of the valve stem (11).

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