Anti-leakage self-sealing valve

Abstract

The utility model discloses an anti-leakage self-sealing valve, and relates to the technical field of valves. The valve core is used for controlling the valve to be opened and closed, the valve seat is arranged in the valve body and is matched with the valve core, the end part of the valve core is connected with a valve rod, and the valve rod is fixedly connected with a hand wheel; the valve element comprises a base and a valve bonnet, an annular groove is formed in the base, a plurality of expansion gaskets are arranged in the groove, a sealing cavity is formed in the base, the expansion gaskets are communicated with the interior of the sealing cavity, and a gas channel is formed in the top end of the base. The valve element is provided with the base, the valve bonnet, the sealing cavity formed in the base and the expansion washers communicated with the sealing cavity, automatic expansion is achieved under the action of the push rod, the expansion washers make contact with the valve seat, the sealing performance of the valve element at the valve seat is improved, and the service life of the valve element is prolonged. The influence of scratches between the valve seat and the valve element on the sealing performance is reduced, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an anti-leakage self-sealing valve. Background Art

[0002] Valves are control components in fluid conveying systems. They have functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Valves are used in fluid control systems and have stability. 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. With the rise of water conservancy projects, valves are widely used.

[0003] After a sealing valve has been used for a long time, the sealing performance between the valve seat and the valve core inside the valve will be seriously reduced. In particular, due to repeated rotation and friction between the valve seat and the valve core, damage and scratches will appear on the surface of the valve core. The sealing performance will increase with the increase of damage and scratches. Gradually, the fluid will easily seep out through the scratches on the valve core, reducing the valve's cut-off ability. Utility Model Content

[0004] The utility model aims to provide a leakage-proof self-sealing valve to solve the following technical problems: damage and scratches may appear on the surface of the valve core, and the sealing performance will increase with the increase of damage and scratches.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] An anti-leakage self-sealing valve, comprising a valve body, a valve core for controlling the opening and closing of the valve, a valve seat in the valve body that cooperates with the valve core, a valve stem connected to the end of the valve core, and a hand wheel fixedly connected to the valve stem;

[0007] The valve core includes a base and a valve cap, the base is provided with an annular groove, a plurality of expansion washers are arranged in the groove, a sealing cavity is provided in the base, the plurality of expansion washers are communicated with the sealing cavity, a gas channel is provided at the top of the base, the gas channel is communicated with the sealing cavity, a push rod is slidably connected in the gas channel, a telescopic rod is fixedly connected to the end of the push rod, a telescopic groove is provided in the valve stem, and the telescopic rod is slidably connected in the telescopic groove;

[0008] An end cover is provided on the side of the telescopic rod away from the push rod, and the end cover is slidably installed on the valve stem. Connecting grooves are symmetrically opened on both sides of the valve stem, and the two connecting grooves are connected to the telescopic groove. The end cover is connected to the end of the telescopic rod through a connecting rod, and the connecting rod is slidably installed in the connecting groove.

[0009] As a further solution of the utility model, a valve cover is arranged on the valve body, a support frame is fixedly connected to the valve cover, and the valve stem is threadedly connected to the support frame.

[0010] As a further solution of the utility model, storage grooves are symmetrically opened on both sides of the valve cover, and telescopic parts are fixedly arranged in the two storage grooves, and the ends of the two telescopic parts are fixedly connected to the bottom of the end cover.

[0011] As a further solution of the utility model, a limit rod is fixedly installed on the valve stem, and the limit rod is abutted and matched with the end cover.

[0012] As a further solution of the utility model, the side surface of the valve bonnet is an inclined arc surface, the valve seat is provided with an inclined surface matching with the valve bonnet, and the valve bonnet is movably connected to the valve seat.

[0013] Beneficial effects of the utility model:

[0014] The utility model realizes automatic expansion by arranging the valve core into a base and a valve cap, a sealing cavity built in the base and a plurality of expansion gaskets communicated with the sealing cavity, and the expansion gaskets are in contact with the valve seat under the action of the push rod, thereby improving the sealing performance of the valve core at the valve seat, reducing the influence of the scratches between the valve seat and the valve core on the sealing performance, and prolonging the service life of the valve;

[0015] The limit rod cooperates with the end cover to realize the movement of the push rod, thereby realizing the expansion operation of the expansion gasket. The limit rod also limits the descending distance of the valve stem to prevent the valve core from continuing to move downward and causing further wear on the valve cap and valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 This is a structural schematic diagram of a leakage-proof self-sealing valve of the utility model;

[0018] Figure 2 yes Figure 1 A is an enlarged view of the middle image.

[0019] Figure 3 It is a partial structural schematic diagram of the valve stem of the utility model.

[0020] In the figure: 1. valve body; 2. valve stem; 3. support frame; 4. hand wheel; 5. valve seat; 6. inclined surface; 7. limit rod; 8. valve core; 81. base; 82. groove; 83. expansion gasket; 84. gas channel; 85. sealing chamber; 86. valve cap; 9. telescopic rod; 10. push rod; 11. end cover; 12. telescopic member; 13. connecting groove; 14. connecting rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-3 As shown, the utility model is a leakage-proof self-sealing valve, which includes a valve body 1, a valve core 8 for controlling the opening and closing of the valve, a valve seat 5 in the valve body 1 that cooperates with the valve core 8, a valve stem 2 connected to the end of the valve core 8, and a hand wheel 4 fixedly connected to the valve stem 2.

[0023] The valve core 8 includes a base 81 and a valve cap 86. The base 81 is provided with an annular groove 82, and a plurality of expansion washers 83 are arranged in the groove 82. A sealing cavity 85 is provided in the base 81, and the plurality of expansion washers 83 are communicated with the sealing cavity 85. A gas channel 84 is provided at the top of the base 81, and the gas channel 84 is communicated with the sealing cavity 85. A push rod 10 is slidably connected in the gas channel 84, and a telescopic rod 9 is fixedly connected at the end of the push rod 10. A telescopic groove is provided in the valve stem 2, and the telescopic rod 9 is slidably connected in the telescopic groove.

[0024] An end cap 11 is provided on the side of the telescopic rod 9 away from the push rod 10, and the end cap 11 is slidably mounted on the valve stem 2. Connecting grooves 13 are symmetrically provided on both sides of the valve stem 2. The two connecting grooves 13 are connected to the telescopic grooves. The end cap 11 is connected to the end of the telescopic rod 9 through a connecting rod 14, and the connecting rod 14 is slidably mounted in the connecting groove 13;

[0025] A limit rod 7 is fixedly mounted on the valve stem 2, and the limit rod 7 is in contact with the end cover 11. The limit rod 7 limits the descending distance of the valve stem 2, thereby preventing the valve core 8 from continuously moving downward and causing further wear to the valve cap 86 and the valve seat 5.

[0026] When in use, the hand wheel 4 is used to drive the valve stem 2 to move downward, and the valve core 8 at the end of the valve stem 2 moves downward, so that the valve cap 86 is fixed to the inclined surface 6 of the valve seat 5, thereby realizing a primary seal of the valve core 8. At this time, the base 81 of the valve core 8 is between the valve seat 5. During the downward movement of the valve stem 2, the limit rod 7 on the valve stem 2 moves downward synchronously, the limit rod 7 contacts the end cover 11 and drives the end cover 11 to move downward, and the end cover 11 drives the telescopic rod 9 to move downward in the telescopic rod 9 through the connecting rod 14, so that the push rod 10 at the end of the telescopic rod 9 moves downward in the gas channel 84, and the push rod 10 compresses the internal gas of the sealing chamber 85, so that the gas is filled from the sealing chamber 85 into the expansion gasket 83, and the expansion gasket 83 expands and contacts the valve seat 5, thereby realizing a secondary seal of the valve core 8.

[0027] Specifically, storage grooves are symmetrically provided on both sides of the valve cover, and telescopic parts 12 are fixedly arranged in the two storage grooves. The ends of the two telescopic parts 12 are fixedly connected to the bottom of the end cover 11. The telescopic parts 12 are springs. When the hand wheel 4 drives the valve stem 2 to move upward, the end cover 11 moves upward under the action of the elastic part. At this time, the gas in the expansion gasket 83 retracts into the sealing cavity 85, reducing the wear of the expansion gasket 83 during the movement of the valve core 8.

[0028] Specifically, a valve cover is provided on the valve body 1, a support frame 3 is fixedly connected to the valve cover, a valve stem 2 is threadedly connected to the support frame 3, and the hand wheel 4 rotates to drive the valve stem 2 to rotate on the support frame 3, thereby realizing the up and down movement of the valve stem 2.

[0029] Specifically, the side surface of the valve cap 86 is an inclined arc surface, and the valve seat 5 is provided with an inclined surface 6 that matches the valve cap 86 . The valve cap 86 and the valve seat 5 are movably connected.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A leakage-proof self-sealing valve, characterized in that: It comprises a valve body (1), a valve core (8) for controlling the opening and closing of the valve, and a valve seat (5) in the valve body (1) and matched with the valve core (8); the end of the valve core (8) is connected to a valve stem (2), and a hand wheel (4) is fixedly connected to the valve stem (2); The valve core (8) comprises a base (81) and a valve cap (86); an annular groove (82) is provided on the base (81); a plurality of expansion washers (83) are arranged in the groove (82); a sealing cavity (85) is provided in the base (81); the plurality of expansion washers (83) are communicated with the sealing cavity (85); a gas passage (84) is provided at the top of the base (81); the gas passage (84) is communicated with the sealing cavity (85); a push rod (10) is slidably connected in the gas passage (84); a telescopic rod (9) is fixedly connected to the end of the push rod (10); a telescopic groove is provided in the valve stem (2); the telescopic rod (9) is slidably connected in the telescopic groove; An end cover (11) is provided on the side of the telescopic rod (9) facing away from the push rod (10), and the end cover (11) is slidably arranged on the valve stem (2). Connecting grooves (13) are symmetrically provided on both sides of the valve stem (2), and the two connecting grooves (13) are connected to the telescopic grooves. The end cover (11) is connected to the end of the telescopic rod (9) through a connecting rod (14), and the connecting rod (14) is slidably installed in the connecting groove (13).

2. The anti-leakage self-sealing valve according to claim 1, characterized in that: The valve body (1) is provided with a valve cover, a support frame (3) is fixedly connected to the valve cover, and the valve stem (2) is threadedly connected to the support frame (3).

3. The anti-leakage self-sealing valve according to claim 2, characterized in that: The valve cover is symmetrically provided with storage grooves on both sides, and telescopic parts (12) are fixedly arranged in the two storage grooves, and the ends of the two telescopic parts (12) are fixedly connected to the bottom of the end cover (11).

4. The anti-leakage self-sealing valve according to claim 3, characterized in that: A limit rod (7) is fixedly mounted on the valve stem (2), and the limit rod (7) is in abutment with the end cover (11).

5. The anti-leakage self-sealing valve according to claim 1, characterized in that: The side surface of the valve cap (86) is an inclined arc surface, and the valve seat (5) is provided with an inclined surface (6) that matches the valve cap (86). The valve cap (86) is movably connected to the valve seat (5).

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