High-sealing-performance valve

Abstract

The utility model discloses a high-sealing-performance valve which comprises a valve body, a valve rod is arranged on the upper portion inside the valve body, the valve rod and the valve body are connected through a connector, padding is arranged on the outer side wall of the valve rod inside the valve body, a gland is arranged on the upper portion of the valve body, the gland is arranged on the outer side of the valve rod in a sleeved mode, and the connector is connected with the gland. The gland and the valve body are in fastening and threaded connection through a plurality of gland screws, a gasket is arranged between the valve rod and the valve body, a worm gear transmission device is arranged above the valve rod, and the worm gear transmission device and the valve body are in fastening connection through a plurality of worm gear studs and nuts. According to the high-sealing-performance valve, the hard alloy surfacing layer and the sealing oil film are arranged, the hard alloy surfacing layer can improve the strength of the connecting positions of the rotary valve and the valve pipes at the two ends, reduce abrasion of the connecting positions, improve the corrosion resistance of the connecting positions and prolong the service life of the connecting positions, and the sealing oil film can improve the sealing degree of the connecting positions of the rotary valve and the valve pipes at the two ends; and flowing substances in the valve body are prevented from being lost.

Description

Technical Field

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

[0002] Valves are control components in fluid delivery systems and have functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, and flow diversion or overflow pressure relief. Valves used in fluid control systems come in a wide variety of varieties and specifications, from the simplest shut-off valves to the various valves used in extremely complex automatic control systems.

[0003] After searching, the existing patent (publication number: CN219263478U) discloses a high-sealing valve, which relates to the field of valve technology, and specifically includes a valve body, wherein the outer rings at both ends of the valve body are fixedly connected with connecting flanges, and the inner cavity of the connecting flange is fixedly connected with a sealing air cushion 1, and the outer surfaces at both ends of the valve body are provided with an external sealing structure, and the inner cavities at both ends of the valve body are provided with a sealing groove, and the inner cavity of the sealing groove is provided with an internal sealing structure. This high-sealing valve, through the setting of the external sealing structure, the external sealing structure can seal the valve connection from the outside, thereby improving the sealing of the valve, and the sealing air cushion 2 is located in the inner cavity of the connecting flange, thereby reducing the influence of the external environment on the sealing air cushion 2, and extending the service life of the sealing air cushion 2, and through the setting of the internal sealing structure, the spring's rebound force enables the connection between the sealing ring and the valve to always be in a tightly fitted state, thereby reducing the influence of rubber aging on the fit between the sealing ring and the valve connection.

[0004] When the valve is in use, the spring's rebound force keeps the sealing ring and the valve's connection in a tightly fitted state at all times. However, the valve has a shortcoming in that the spring's rebound force is not strong enough to achieve a sealing effect. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a high-sealing valve, which solves the problems raised by the above-mentioned background technology.

[0006] To achieve the above object, the utility model is realized by the following technical solutions: A highly sealed valve, including a valve body, above the inside of the valve body is provided with a valve stem, the valve stem and the valve body are connected by a coupling, the inside of the valve body is provided with packing on the outer side wall of the valve stem, above the valve body is provided with a gland, the gland is sleeved on the outer side of the valve stem, the gland and the valve body are tightly screwed and connected by a plurality of gland screws, a gasket is arranged between the valve stem and the valve body, above the valve stem is provided with a worm gear transmission device, the worm gear transmission device and the valve body are tightly connected by a plurality of worm gear stud nuts, below the valve body is tightly connected with a valve cover by a plurality of valve cover stud nuts, both the left and right sides of the valve body are provided with sealing mechanisms, and the sealing mechanism includes an insertion pipe and two extrusion sealing rings.

[0007] Preferably, a plurality of grease injection valves are arranged inside the valve body, a check valve is arranged on the outer side wall of the valve body below the grease injection valve, a plug is screwed inside the valve cover, a thrust bearing is arranged inside the valve body, and a nut is screwed on the outer side wall of the plug.

[0008] Preferably, O-ring seals are arranged on the top of the nut, the outer side wall of the plug and the outer side wall of the valve stem, and a metal wound gasket is arranged at the connection between the valve cover and the valve body. Hard alloy surfacing layers are arranged at the connections between the rotary valve and the two end valve pipes in the valve body, and a sealing oil film is arranged between the two hard alloy surfacing layers.

[0009] Preferably, annular grooves are opened on both the left and right sides of the valve body, a moving ring is slidably connected to the inner side wall of the annular groove, two grooves are opened on the outer side wall of the moving ring, and one end of the extrusion sealing ring away from the valve body is fixedly connected to one end of the groove away from the valve body.

[0010] Preferably, a plurality of fixing rods are slidably connected inside the insertion pipe, two movable grooves are opened inside the insertion pipe, an extrusion ring is arranged inside the movable groove, and the inner side wall of the extrusion ring is fixedly connected to the outer side wall of the fixing rod.

[0011] Preferably, a fixing ring is fixed on the inner side wall of the valve body, one end of the fixing rod close to the valve body passes through the moving ring and is fixedly connected to one end of the fixing ring close to the moving ring, a plurality of round holes are opened on the right side inside the annular groove, a spring is fixed inside the round hole, and the other end of the spring is fixedly connected to the moving ring.

[0012] Beneficial effects

[0013] The utility model provides a highly sealed valve. Compared with the prior art, the following beneficial effects are achieved:

[0014] 1. For this highly-sealed valve, by setting a hard alloy surfacing layer and a sealing oil film, the hard alloy surfacing layer can increase the strength at the connection between the rotary valve and the valve pipes at both ends, reduce its wear, increase its corrosion resistance, and extend its service life. The sealing oil film can increase the sealing degree at the connection between the rotary valve and the valve pipes at both ends, preventing the loss of substances flowing inside the valve body.

[0015] 2. For this highly-sealed valve, by setting a sealing mechanism, the insertion pipe is inserted into the interior of the connecting pipe, and then the valve body and the connecting pipe are connected using bolts and nuts. The flange of the connecting pipe presses the moving ring, and the moving ring drives the insertion pipe to move. In this way, the pressing ring presses the inner sidewall of the pressing sealing ring, and the outer sidewall of the pressing sealing ring fits tightly with the inner sidewall of the connecting pipe, thus increasing the sealing performance at the connection between the valve body and the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the present utility model;

[0017] Figure 2 is the present utility model Figure 1 schematic structural view of part A therein;

[0018] Figure 3 is the present utility model Figure 1 schematic structural view of part B therein;

[0019] Figure 4 is the schematic cross-sectional structural view of the insertion pipe in the present utility model;

[0020] Figure 5 is the schematic cross-sectional structural view of the pressing ring and the pressing sealing ring in the present utility model;

[0021] Figure 6 is the schematic structural view of the insertion pipe in the present utility model.

[0022] In the figure: 1. gland; 2. gland screw; 3. worm screw nut; 4. groove; 5. valve stem; 6. coupling; 7. gasket; 8. ring groove; 9. metal wound gasket; 10. plug; 11. O-ring seal; 12. nut; 13. valve cover screw nut; 14. valve cover; 15. thrust bearing; 16. sealing mechanism; 17. valve body; 18. check valve; 19. grease injection valve; 20. packing; 21. worm gear drive; 22. round hole; 23. spring; 24. sealing oil film; 25. hard alloy surfacing layer; 26. pressing sealing ring; 27. pressing ring; 28. insertion pipe; 29. fixing rod; 30. fixing ring; 31. moving ring; 32. movable groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1-6 , the present utility model provides a technical solution: a highly sealed valve, including a valve body 17, a valve stem 5 is arranged above the inside of the valve body 17, the valve stem 5 and the valve body 17 are connected by a coupling 6, a packing 20 is arranged on the outer side wall of the valve stem 5 inside the valve body 17, a gland 1 is arranged above the valve body 17, the gland 1 is sleeved on the outer side of the valve stem 5, the gland 1 and the valve body 17 are tightly screwed and connected by a plurality of gland screws 2, a gasket 7 is arranged between the valve stem 5 and the valve body 17, a worm gear transmission device 21 is arranged above the valve stem 5, the worm gear transmission device 21 and the valve body 17 are tightly connected by a plurality of worm gear stud nuts 3, a valve cover 14 is tightly connected below the valve body 17 by a plurality of valve cover stud nuts 13, sealing mechanisms 16 are arranged on both the left and right sides of the valve body 17, the sealing mechanism 16 includes an insertion tube 28 and two extrusion sealing rings 26, a plurality of grease injection valves 19 are arranged inside the valve body 17, a check valve 18 is arranged on the outer side wall of the valve body 17 below the grease injection valve 19, a plug 10 is screwed inside the valve cover 14, a thrust bearing 15 is arranged inside the valve body 17, a nut 12 is screwed on the outer side wall of the plug 10, O-ring seals 11 are arranged on the top of the nut 12, the outer side wall of the plug 10 and the outer side wall of the valve stem 5, and a metal wound gasket 9 is arranged at the connection between the valve cover 14 and the valve body 17. Hard alloy surfacing layers 25 are arranged at the connections between the rotary valve and the two end valve pipes in the valve body 17, a sealing oil film 24 is arranged between the two hard alloy surfacing layers 25, the hard alloy surfacing layer 25 can increase the strength of the connection between the rotary valve and the two end valve pipes, reduce its wear, increase its corrosion resistance, and extend its service life, and the sealing oil film 24 can increase the sealing degree of the connection between the rotary valve and the two end valve pipes, preventing the substances flowing inside the valve body 17 from leaking.

[0025] Further, annular grooves 8 are formed on both the left and right sides of the valve body 17. A movable ring 31 is slidably connected to the inner side wall of the annular groove 8. Two grooves 4 are formed on the outer side wall of the movable ring 31. One end of the extrusion sealing ring 26 away from the valve body 17 is fixedly connected to one end of the groove 4 away from the valve body 17. A plurality of fixing rods 29 are slidably connected to the inside of the insertion tube 28. Two movable grooves 32 are formed in the inside of the insertion tube 28. An extrusion ring 27 is arranged inside the movable groove 32. The inner side wall of the extrusion ring 27 is fixedly connected to the outer side wall of the fixing rod 29. A fixing ring 30 is fixedly arranged on the inner side wall of the valve body 17. One end of the fixing rod 29 close to the valve body 17 passes through the movable ring 31 and is fixedly connected to one end of the fixing ring 30 close to the movable ring 31. A plurality of round holes 22 are formed on the right side inside the annular groove 8. A spring 23 is fixedly arranged inside the round hole 22. The other end of the spring 23 is fixedly connected to the movable ring 31. The insertion tube 28 is inserted into the inside of the connecting pipe, and then the valve body 17 and the connecting pipe are connected by bolts and nuts. The flange of the connecting pipe extrudes the movable ring 31, and the movable ring 31 drives the insertion tube 28 to move. In this way, the extrusion ring 27 extrudes the inner side wall of the extrusion sealing ring 26, and the outer side wall of the extrusion sealing ring 26 is closely attached to the inner side wall of the connecting pipe, thereby increasing the sealing performance at the connection between the valve body 17 and the connecting pipe.

[0026] During operation, the insertion tube 28 is inserted into the inside of the connecting pipe, and then the valve body 17 and the connecting pipe are connected by bolts and nuts. The flange of the connecting pipe extrudes the movable ring 31, and the movable ring 31 drives the insertion tube 28 to move. In this way, the extrusion ring 27 extrudes the inner side wall of the extrusion sealing ring 26, and the outer side wall of the extrusion sealing ring 26 is closely attached to the inner side wall of the connecting pipe, thereby increasing the sealing performance at the connection between the valve body 17 and the connecting pipe.

[0027] Meanwhile, the content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0028] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0029] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A highly sealed valve, comprising a valve body (17), characterized in that: Above the interior of the valve body (17), a valve stem (5) is provided. The valve stem (5) and the valve body (17) are connected by a coupling (6). Inside the valve body (17) and on the outer sidewall of the valve stem (5), a packing (20) is provided. Above the valve body (17), a gland (1) is provided. The gland (1) is sleeved on the outer side of the valve stem (5). The gland (1) and the valve body (17) are tightly screwed and connected by a plurality of gland screws (2). A gasket (7) is provided between the valve stem (5) and the valve body (17). Above the valve stem (5), a worm gear drive device (21) is provided. The worm gear drive device (21) and the valve body (17) are tightly connected by a plurality of worm gear studs and nuts (3). Below the valve body (17), a valve cover (14) is tightly connected by a plurality of valve cover studs and nuts (13). On the left and right sides of the valve body (17), a sealing mechanism (16) is provided. The sealing mechanism (16) includes an insertion tube (28) and two extrusion sealing rings (26).

2. The high-sealing valve according to claim 1, characterized in that: Inside the valve body (17), a plurality of grease injection valves (19) are provided. Below the grease injection valves (19) on the outer sidewall of the valve body (17), a check valve (18) is provided. Inside the valve cover (14), a plug (10) is screwed. Inside the valve body (17), a thrust bearing (15) is provided. On the outer sidewall of the plug (10), a nut (12) is screwed.

3. The high-sealing valve according to claim 2, wherein: On the top of the nut (12), on the outer sidewall of the plug (10), and on the outer sidewall of the valve stem (5), O-ring seals (11) are provided. At the connection between the valve cover (14) and the valve body (17), a spiral wound gasket (9) is provided. At the connections between the rotary valve and the two end valve pipes in the valve body (17), hard alloy surfacing layers (25) are provided. Between the two hard alloy surfacing layers (25), a sealing oil film (24) is provided.

4. The high-sealing valve according to claim 3, characterized in that: On the left and right sides of the valve body (17), annular grooves (8) are provided. On the inner sidewall of the annular grooves (8), a moving ring (31) is slidably connected. On the outer sidewall of the moving ring (31), two grooves (4) are provided. One end of the extrusion sealing ring (26) away from the valve body (17) is fixedly connected to one end of the groove (4) inside away from the valve body (17).

5. The high-sealing valve according to claim 4, wherein: Inside the insertion tube (28), a plurality of fixing rods (29) are slidably connected. Inside the insertion tube (28), two movable grooves (32) are provided. Inside the movable grooves (32), an extrusion ring (27) is provided. The inner sidewall of the extrusion ring (27) is fixedly connected to the outer sidewall of the fixing rod (29).

6. The high-sealing valve according to claim 5, characterized in that: On the inner sidewall of the valve body (17), a fixing ring (30) is fixed. One end of the fixing rod (29) close to the valve body (17) passes through the moving ring (31) and is fixedly connected to one end of the fixing ring (30) close to the moving ring (31). On the right side inside the annular groove (8), a plurality of round holes (22) are provided. Inside the round holes (22), a spring (23) is fixed. The other end of the spring (23) is fixedly connected to the moving ring (31).

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