Gas self-closing valve sealing structure

Abstract

The utility model discloses a gas self-closing valve sealing structure which comprises a valve cover, a valve rod movably arranged on the valve cover, a spacer sleeve arranged on the valve rod and a gasket connected to the spacer sleeve in a sleeved mode, an installation hole is formed in the valve cover in a communicating mode, a sealing assembly is arranged in the installation hole, and the gasket is connected to the spacer sleeve in a sleeved mode. One end of the valve rod penetrates through the sealing assembly and extends out of the valve deck to be detachably connected with the lifting button, the other end of the valve rod synchronously drives the spacer sleeve to move and abut against the orifice end face of the mounting hole, and the gasket moves into the valve deck. The sealing assembly is arranged at the position, corresponding to the penetrating position of the valve rod, of the valve cover, meanwhile, the internal installation structure between the valve cover and the valve seat is simplified, installation is convenient, and production and use cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas appliance technical field, especially a kind of gas self-closing valve sealing structure. BACKGROUND

[0002] In the existing gas safety valve, the self-closing sealing structure position is usually a sealing film is pressed in the inner side of the connecting position of valve cover and valve seat, to replace the installation of sealing ring. Due to the machining error of valve cover and valve seat, the gap of connecting position is not stable, so that the sealing property of the pressed sealing film is also not stable, and gas leakage gap is easily formed in the use process. In addition, the amount of sealing film used after such connection is larger, and the sealing fails can only be replaced, which not only has high processing cost, but also has high replacement cost. SUMMARY

[0003] In view of the above technical problems of the prior art, the utility model provides a gas self-closing valve sealing structure which is simple in structure and can reduce cost.

[0004] To solve the above technical problems, one technical scheme of the utility model is to provide a gas self-closing valve sealing structure, which comprises a valve cover, a valve rod movably arranged on the valve cover, a retaining sleeve arranged on the valve rod, and a gasket sleeved on the retaining sleeve. An installation hole is formed in the valve cover and communicates with the valve cover. A sealing assembly is arranged in the installation hole. One end of the valve rod penetrates through the sealing assembly and extends out of the valve cover to be detachably connected with a knob. The other end of the valve rod synchronously drives the retaining sleeve to move and abut against the hole opening end surface of the installation hole, and the gasket moves into the valve cover.

[0005] With the above structure, the sealing assembly is arranged in the installation hole, and the valve rod penetrates through the sealing assembly, so that the sealing function is realized at the position of the valve rod. The connecting position between the valve cover and the valve seat is not provided with a sealing member (sealing film), and the valve rod needs to move together with the knob to adjust the position of the gasket in the valve cover, so as to realize the purpose of adjusting the opening and closing of the valve. In the whole installation structure, the valve cover and the knob only have relative movement caused by the penetration of the valve rod, and the movement of the retaining sleeve abuts against the hole opening end surface of the installation hole at the position of the installation hole, which can block the gas leakage at the position of the installation hole under the gas pressure environment. When the gasket moves into the valve cover, it can also provide auxiliary guiding effect for the movement of the valve rod, reduce the wear between the valve rod and the sealing assembly, effectively ensure the sealing property of the valve rod during movement, and is convenient to install, which reduces the processing cost and use cost.

[0006] In order to facilitate processing and installation, preferably, a placement hole is arranged on one side of the valve cover, and a fixed block is fixedly arranged on the other side. An installation hole is arranged on the fixed block and communicates with the placement hole. The installation hole is a stepped hole with large inner diameter and small outer diameter. The large hole end of the installation hole communicates with the placement hole.

[0007] In order to simplify the structure, as preferred, the sealing assembly comprises a sealing ring arranged in the mounting hole and a gasket arranged in the placement hole and covering the outer side of the sealing ring, a ring groove is arranged on the hole wall of the large hole end of the mounting hole in the circumferential direction, the sealing ring is arranged in the ring groove, the inner diameter size of the sealing ring is in interference fit with the outer diameter size of the valve rod; in use, the valve rod is sequentially arranged through the gasket and the sealing ring and pulling the valve rod can slide on the sealing ring.

[0008] In order to facilitate the placement of the gasket, as preferred, a boss is arranged at the position corresponding to the mounting hole at the hole bottom of the placement hole, a limiting hole in communication with the large hole end of the mounting hole is arranged on the boss, and the gasket is placed in the limiting hole.

[0009] In order to facilitate the installation of the gasket, as preferred, a bending section extending to the center direction of the valve cover is arranged around the boss at the position corresponding to the hole opening of the limiting hole, the inner side wall of the bending section abuts against the outer side wall of the gasket, and the inner side wall of the gasket abuts against and limits the outer side end face of the sealing ring.

[0010] In order to facilitate the installation, as preferred, a convex ring is arranged around the outer side of the stop sleeve in the circumferential direction, the gasket is sleeved on the convex ring, one end of the valve rod protruding from the valve cover is connected with the knob in screw connection, and when the valve rod is pulled to slide on the sealing ring, the gasket is synchronously driven to move into the placement hole, and the outer side wall of the gasket is matched with the hole wall of the placement hole.

[0011] In order to reduce the movement of the valve rod, as preferred, a limiting plate is arranged on one side of the valve rod corresponding to the convex ring, a counterbore is arranged on the convex ring corresponding to the position of the limiting plate, and the communication position of the stop sleeve and the convex ring is provided through the counterbore.

[0012] In order to facilitate the connection with the external assembly, as preferred, an external groove for placing an external sealing ring is arranged on one side of the outer side wall of the valve cover in the circumferential direction, and a stop groove is arranged on the other side in the circumferential direction.

[0013] In order to avoid interference, as preferred, a certain amount of space inclined surface is arranged on the outer side wall of the valve cover corresponding to the position between the external groove and the fixing block.

[0014] Beneficial effects: the sealing assembly is arranged on the valve cover corresponding to the arrangement position of the valve rod, and the internal installation structure between the valve cover and the valve seat is simplified, which not only facilitates the installation but also reduces the production and use cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0016] Fig. 1 It is the installation structure schematic view of the utility model.

[0017] Fig. 2 It is the structure schematic view of the valve cover.

[0018] Fig. 3 It is the installation structure schematic view of the valve rod.

[0019] The meaning of each reference sign in the drawing is as follows:

[0020] Valve cover-1, valve rod-10, limit plate-101, baffle sleeve-11, gasket-110, convex ring-111, counterbore-112, mounting hole-12, placing hole-13, external groove-14, retreat stop groove-15, fixed block-16, give way inclined surface-17;

[0021] Sealing ring-2, gasket-21, boss-3, limit hole-30, bent section-32. DETAILED DESCRIPTION

[0022] As shown in Figs. 1 to 3 The utility model discloses a valve cover, the valve rod 10 of movable setting on the valve cover 1, the baffle sleeve 11 of setting on the valve rod 10 and the gasket 110 of sleeveing in baffle sleeve 11, the valve cover 1 is equipped with the mounting hole 12 in intercommunication, and the sealing assembly is equipped in the mounting hole 12, the valve rod 10 is equipped with the sealing assembly and is extended valve cover 1 with the detachable connection of knob (not marked) to one end, the other end of this valve rod 10 then synchronously drives baffle sleeve 11 to move and with the hole orifice end surface of mounting hole 12 abuts, and gasket 110 moves into valve cover 1.

[0023] Specifically, one side of the valve cover 1 is equipped with the placing hole 13, and the other side is fixed with the fixed block 16, and the mounting hole 12 is arranged in intercommunication with the placing hole 13 on the fixed block 16, the mounting hole 12 is the stepped hole of inside big and outside small, and the big hole end of the mounting hole 12 is arranged in intercommunication with the placing hole 13.

[0024] The sealing assembly includes the sealing ring 2 arranged in the mounting hole 12 and the gasket 21 arranged in the placing hole 13 and covering the outer side of the sealing ring 2, the ring groove is arranged on the hole wall of the big hole end of the mounting hole 12 in the circumferential direction, the sealing ring 2 is embedded in the ring groove, and the inner diameter size of the sealing ring 2 is in interference fit with the outer diameter size of the valve rod 10; in use, the valve rod 10 is sequentially arranged through the gasket 21 and the sealing ring 2 and can slide on the sealing ring 2 by pulling the valve rod 10.

[0025] A boss 3 is provided at the bottom of the placement hole 13 corresponding to the position of the mounting hole 12. A limiting hole 30 is provided on the boss 3, which communicates with the large end of the mounting hole 12. The gasket 21 is placed flat in the limiting hole 30. A bent section 32 extending towards the center of the valve cover 1 is provided on the boss 3 at the position corresponding to the opening of the limiting hole 30. The inner sidewall of the bent section 32 abuts against the outer sidewall of the gasket 21, and the inner sidewall of the gasket 21 abuts against the outer end face of the sealing ring 2 for limiting.

[0026] A convex ring 111 is wound around the outer side of the retaining sleeve 11 along the circumferential direction. The washer 110 is sleeved on the convex ring 111. One end of the valve stem 10 extending out of the valve cover 1 is screwed to the lifting knob. When the lifting knob pulls the valve stem 10 to slide on the sealing ring 2, it simultaneously drives the washer 110 to move into the placement hole 13. The outer wall of the washer 110 fits snugly against the hole wall of the placement hole 13.

[0027] A limiting plate 101 is provided on one side of the valve stem 10 corresponding to the convex ring 111, and a countersunk hole 112 is provided on the convex ring 111 at the position corresponding to the limiting plate 101. The connection position between the retaining sleeve 11 and the convex ring 111 is configured to communicate with the countersunk hole 112.

[0028] An external groove 14 for placing an external sealing ring is provided on one side of the outer wall of the valve cover 1 in a circumferential direction, and an anti-reverse groove 15 is provided on the other side in a circumferential direction; a clearance slope 17 is provided on the outer wall of the valve cover 1 at the position between the external groove 14 and the fixing block 16.

[0029] The working principle of this utility model is as follows:

[0030] like Figs. 1 to 3 As shown, before use, a placement hole 13 is machined on the valve cover 1, and a stepped mounting hole 12 is machined at the bottom of the placement hole 13 corresponding to the position of the fixing block 16. An annular groove is machined on the wall of the large end of the mounting hole 12, and at least one sealing ring 2 is embedded in the annular groove for later use. Preferably, three sealing rings 2 are stacked and embedded. Then, the gasket 21 is placed into the limiting hole 30, and the opening of the limiting hole 30 is pressed to form a bent section 32 extending towards the center of the valve cover 1. The inner sidewall of the bent section 32 abuts against the outer sidewall of the gasket 21, and the inner sidewall of the gasket 21 abuts against the outer end face of the uppermost sealing ring 2 for limiting.

[0031] Next, an external groove 14 for placing the external sealing ring, a backstop groove 15 for connecting external components, and a clearance slope 17 for avoiding installation interference are sequentially machined on the outside of the valve cover 1.

[0032] The middle part of the baffle sleeve 11 is provided with a through hole (not marked), and the through hole is provided with an opening corresponding to one side of the protruding ring 111. The outer side of the baffle sleeve 11 is integrally provided with the protruding ring 111 in the circumferential direction. The valve rod 10 is provided with a limiting plate 101 on one side. The opening position is provided with a counterbore 112 for placing the limiting plate 101. The valve rod 10 is inserted through the through hole, and then the gasket 110 is sleeved on the protruding ring 111. In this way, the gasket 110 realizes the installation limiting of the valve rod 10.

[0033] During installation, the valve rod 10 extends into the valve cover 1 from one side of the placement hole 13, is inserted into the installation hole 12, and is inserted out of the valve cover 1 through the sealing ring 2. The through end of the valve rod 10 is connected with the knob screw connection. The valve cover (not marked) is buckled at the position of the stop groove 15 and covers the placement hole 13. The screw connection between the valve rod 10 and the knob facilitates disassembly and replacement of parts, reduces the processing difficulty of each part, reduces the processing cost, and is convenient to install, improves the sealing stability, and also reduces the use cost.

[0034] During use, if the gas pipe needs to be closed, the automatic control unit (not marked) matched with the valve pushes the knob to drive the valve rod 10 to move and synchronously drive the protruding ring 111 and the gasket 110 to move out of the placement hole 13. The inner wall of the connection position of the valve cover 1 and the gas pipe abuts against the outer wall of the gasket 110 to block the through hole position of the connection position. At this time, the valve rod 10 is in the installation hole 12, and the inner diameter size of the sealing ring 2 and the outer diameter size of the valve rod 10 are in interference fit, which can ensure the sealing property.

[0035] When the gas pipeline needs to be opened, the knob is manually pulled to drive the valve rod 10 to move and synchronously drive the protruding ring 111 and the gasket 110 to move into the placement hole 13, and the baffle sleeve 11 abuts against the outer side end face of the bent section 32 for limiting, and the inner wall of the connection position of the valve cover 1 and the gas pipe is separated from the outer wall of the gasket 110 to expose the through hole position of the connection position. At this time, the valve rod 10 is still in the installation hole 12, and the interference fit between the sealing ring 2 and the valve rod 10 and the abutment between the baffle sleeve 11 and the hole end face of the installation hole 12 can still ensure the sealing property.

[0036] During the entire use process, the opening and closing use principle is the same as that of the existing electromagnetic type gas self-closing valve. Only the knob drives the valve rod 10 and the gasket 110 to move synchronously, and the position of the valve rod 10 and the sealing ring 2 maintains the sealing state, which improves the sealing stability of the connection position between the valve cover 1 and the gas pipe.

[0037] The connection setting and use of the automatic control unit matched with the valve and the sealing film mentioned in the embodiment are all prior art. Only the use of the sealing structure of the embodiment is described and does not belong to the protection range of the application. The related content of the prior art is not described here.

Claims

1. A gas shut-off valve seal structure, characterized by: The utility model provides a valve, including valve cover (1), the valve rod (10) of movable setting on valve cover (1), the sleeve (11) of setting on valve rod (10) and the washer (110) of sleeveing in sleeve (11), the installation hole (12) of being communicated with being set on valve cover (1), the sealing assembly is equipped in installation hole (12), the one end of valve rod (10) is passed through sealing assembly and is extended valve cover (1) with the detachable connection of knob, the other end of this valve rod (10) is synchronous with sleeve (11) and moves and is contacted with the orifice end surface of installation hole (12), and washer (110) moves into valve cover (1) in.

2. A gas shut off valve seal as defined in claim 1, wherein: One side of the valve cover (1) is provided with a placing hole (13), and the other side is fixedly provided with a fixed block (16). The installation hole (12) is communicated with the placing hole (13) and is provided on the fixed block (16). The installation hole (12) is a stepped hole with a large inner diameter and a small outer diameter. The large hole end of the installation hole (12) is communicated with the placing hole (13).

3. A gas shut off valve seal as defined in claim 2, wherein: The sealing assembly includes a sealing ring (2) arranged in the installation hole (12) and a gasket (21) arranged in the placing hole (13) and covering the outer side of the sealing ring (2). A ring groove is arranged on the hole wall of the large hole end of the installation hole (12) in the circumferential direction. The sealing ring (2) is embedded in the ring groove. The inner diameter of the sealing ring (2) is in interference fit with the outer diameter of the valve rod (10). In use, the valve rod (10) is sequentially passed through the gasket (21) and the sealing ring (2) and can be slid on the sealing ring (2) by pulling the valve rod (10).

4. A gas shut off valve seal as defined in claim 3, wherein: A boss (3) is arranged at the position corresponding to the installation hole (12) at the bottom of the placing hole (13). A limiting hole (30) is arranged on the boss (3) and communicated with the large hole end of the installation hole (12). The gasket (21) is placed in the limiting hole (30).

5. A gas shut off valve seal as defined in claim 4, wherein: A bending section (32) extending towards the center of the valve cover (1) is arranged around the hole opening position corresponding to the limiting hole (30) on the boss (3). The inner side wall of the bending section (32) is in contact with the outer side wall of the gasket (21), and the inner side wall of the gasket (21) is in contact with the outer side end face of the sealing ring (2) for limiting.

6. A gas shut off valve seal as defined in claim 2, wherein: A convex ring (111) is arranged in communication in the circumferential direction on the outer side of the sleeve (11). The washer (110) is sleeved on the convex ring (111). The end of the valve rod (10) extending out of the valve cover (1) is screw-connected with the knob. When the valve rod (10) is slid on the sealing ring (2) by pulling the knob, the washer (110) is simultaneously moved into the placing hole (13). The outer side wall of the washer (110) is matched with the hole wall of the placing hole (13).

7. A gas shut off valve seal as defined in claim 6, wherein: A limiting plate (101) is arranged on the valve rod (10) corresponding to one side of the convex ring (111). A counterbore (112) is arranged on the convex ring (111) corresponding to the position of the limiting plate (101). The sleeve (11) and the convex ring (111) are through-connected at the communication position.

8. A gas shut off valve seal as defined in claim 1, wherein: An outer groove (14) for placing an outer sealing ring is arranged on one side of the outer side wall of the valve cover (1) in the circumferential direction.

9. A gas shut off valve seal as defined in claim 8, wherein: A clearance inclined surface (17) is arranged on the outer side wall of the valve cover (1) at a position between the outer groove (14) and the fixing block (16).

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