CN216768391U

CN216768391U - Flushing-free stop valve

Info

Publication number: CN216768391U
Application number: CN202123148886.9U
Authority: CN
Inventors: 夏娟
Original assignee: Shaanxi Zero State Intelligent Control Valve Equipment Co ltd
Current assignee: Shaanxi Chengchuang Future Industry Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-06-17
Anticipated expiration: 2031-12-15

Abstract

The utility model discloses a flushing-free stop valve, which comprises a valve body, wherein a valve rod is arranged in the middle of the valve body, a hand wheel is arranged at the top of the valve body, a hexagonal nut A is arranged in the middle of the upper end of the hand wheel, a first flat gasket is arranged between the hand wheel and the hexagonal nut A, a bearing seat is arranged at the lower end of the hand wheel, a T-shaped threaded sleeve is in threaded connection with the interior of the hexagonal nut A, and pull rods are arranged on two sides of the lower end of the bearing seat Simple process, low cost and the like.

Description

Flushing-free stop valve

Technical Field

The utility model relates to the technical field of flushing-free stop valves, in particular to a flushing-free stop valve.

Background

The shut-off valve is also called a shut-off valve, and belongs to a forced sealing type valve, so when the valve is closed, pressure must be applied to the valve clack to force the sealing surface not to leak. When the medium enters the valve from the lower part of the valve clack, the resistance to be overcome by the operating force is the friction force between the valve rod and the packing and the thrust generated by the pressure of the medium, the force for closing the valve is larger than the force for opening the valve, so the diameter of the valve rod is larger, otherwise the failure of the valve rod buckling can occur. The connection mode is divided into three types: flange connection, screw thread connection and welding connection. After the self-sealing valve appears, the medium flow direction of the stop valve is changed to enter the valve cavity from the upper part of the valve clack, at this time, under the action of medium pressure, the force for closing the valve is small, the force for opening the valve is large, and the diameter of the valve rod can be correspondingly reduced.

The design of high temperature, high pressure exempt from to wash stop valve, one see sealed effect, two see the sealed effect, whether sealed leak promptly, can not close, traditional exempt from to wash stop valve, the closed ring only one, it is not good to seal and seal the modification.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that only one sealing ring is provided and sealing modification are poor in the traditional flushing-free stop valve in the prior art, and provides a flushing-free stop valve which has the effects of adopting four seals and adopting three seals for a valve core assembly.

In order to achieve the purpose, the utility model provides the following technical scheme: a non-flushing stop valve comprises a valve body, wherein a valve rod is arranged in the middle of the valve body, a hand wheel is arranged at the top of the valve body, a hexagonal nut A is arranged in the middle of the upper end of the hand wheel, a first flat gasket is arranged between the hand wheel and the hexagonal nut A, a bearing seat is arranged at the lower end of the hand wheel, a T-shaped threaded sleeve is in threaded connection with the inside of the hexagonal nut A, pull rods are arranged on two sides of the lower end of the bearing seat, a connecting sleeve is connected to the bottom of the T-shaped threaded sleeve, a valve rod is arranged at the lower end of the connecting sleeve, a nut gland is arranged on the outer side of the upper end of the valve rod, a limiting lead screw is arranged on the other side of the connecting sleeve, a deep groove ball bearing is arranged on one side of the limiting lead screw, a sealing pad is arranged on one side of the valve rod, a sealing gland is arranged at the upper end of the sealing pad, a hexagonal nut C is arranged at the upper end of the sealing gland, and a second flat gasket is arranged between the sealing gland and the hexagonal nut C, the hexagonal nut C is internally and threadedly connected with a sealing gland screw rod, the lower end of the pull rod is provided with a sealing seat, the lower end of the sealing gasket is provided with a self-sealing gasket, the inner side of the self-sealing gasket is provided with a self-sealing sleeve, the lower end of the self-sealing gasket is provided with a valve core pressure pad, the lower end of the valve core pressure pad is provided with a valve core, one side of the self-sealing gasket is provided with a valve body screw rod, the inner bottom of the valve body is provided with a valve core seat, and the outer side of the valve core seat is provided with a valve body pressure pad.

Preferably, the seal receptacle and the valve body adopt a double-seal structure, the double-seal structure comprises a first seal surface and a second seal surface, the first seal surface adopts a graphite metal winding pad, the second seal surface adopts a self-seal structure, and the seal material is a graphite nickel wire packing.

Preferably, the inner side of the bearing seat is provided with an inner hexagonal flat end set screw, and one side of the inner hexagonal flat end set screw is provided with a bearing gland nut.

Preferably, the lower end of one side of the connecting sleeve is provided with an inner hexagonal socket head cap screw, the upper end of the nut gland is provided with a valve rod nut, and the top of the valve rod is provided with a first A-shaped elastic retainer ring for the shaft.

Preferably, a second elastic check ring for an A-type shaft is arranged between the deep groove ball bearing and the limiting screw rod, and a hexagonal nut B is arranged at the other end of the limiting screw rod.

Preferably, the lower end of the sealing seat is provided with a hexagonal nut D, and a third flat gasket is arranged between the sealing seat and the hexagonal nut D.

Preferably, a thrust ball bearing is arranged inside the other side of the bearing seat.

Preferably, a hexagonal nut E is arranged at the top of the valve body screw rod, and a standard type spring washer is arranged on the inner side of the hexagonal nut E.

Compared with the prior art, the utility model provides a flushing-free stop valve which has the following beneficial effects:

1. the valve body of the utility model adopts a cylindrical shape, adopts a structure of a single valve core and a single valve core seat, and has the characteristics of no erosion of the valve, good sealing performance, simple structure, low cost and strong applicability, the valve core adopts an eight-hole structure, is convenient to process independently, the water outlet and the water inlet are opposite, the flow speed is convenient, the pressure difference is not formed, the valve core is small in abrasion, the service life is long, and the like, and the valve rod head and the valve core seat form an inner and outer three-way sealing ring, namely a cone circular linear sealing ring;

2. the utility model breaks the design idea of the traditional scouring-free stop valve, adopts four seals and three closed rings in structure, fully considers the characteristics of valve applicability, high temperature resistance, high pressure resistance, scouring-free property, sealing resistance, easy maintenance and the like in material use and structure, is worthy of popularization by adopting the technology of adopting four seals and three seals for the valve core assembly, adopts three closed rings in the design of the valve core assembly, and fully considers the characteristics of structure, simple process, low cost and the like in the design.

Drawings

FIG. 1 is a schematic structural diagram of a flushing-free stop valve according to the present invention;

fig. 2 is a schematic structural diagram of a valve stem of the flushing-free stop valve provided by the utility model.

Description of the reference numerals

1. A hand wheel; 2. a bearing seat; 3. a set screw is fastened at the flat end of the inner hexagon; 4. a bearing gland nut; 5. a first flat gasket; 6. t-shaped thread sleeves; 7. a hexagonal nut A; 8. a thrust ball bearing; 9. a pull rod; 10. connecting sleeves; 11. the elastic retainer ring for the first A-type shaft; 12. a valve stem nut; 13. a socket head cap screw; 14. a nut gland; 15. a valve stem; 16. a hexagonal nut B; 17. a deep groove ball bearing; 18. the second A-shaped shaft elastic retainer ring; 19. a limiting screw rod; 20. a seal gland screw rod; 21. a hexagonal nut C; 22. a second flat washer; 23. a sealing gland; 24. a gasket; 25. a sealing seat; 26. a third flat washer; 27. a hexagonal nut D; 28. a valve body screw rod; 29. a hexagonal nut E; 30. a standard type spring washer; 31. a self-sealing gasket; 32. a self-sealing sleeve; 33. a valve core pressure pad; 34. a valve core; 35. a valve core seat; 36. a valve body pressure pad; 37. a valve body.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are given by way of illustration and explanation only, not limitation.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Referring to fig. 1-2, the present invention provides a technical solution: a non-flushing stop valve comprises a valve body 37, a valve rod 15 is arranged in the middle of the interior of the valve body 37, a hand wheel 1 is arranged at the top of the valve body 37, a hexagon nut A7 is arranged in the middle of the upper end of the hand wheel 1, a first flat gasket 5 is arranged between the hand wheel 1 and the hexagon nut A7, a bearing seat 2 is arranged at the lower end of the hand wheel 1, a T-shaped threaded sleeve 6 is in threaded connection with the interior of the hexagon nut A7, pull rods 9 are arranged on two sides of the lower end of the bearing seat 2, a connecting sleeve 10 is connected to the bottom of the T-shaped threaded sleeve 6, a valve rod 15 is arranged at the lower end of the connecting sleeve 10, a nut gland 14 is arranged on the outer side of the upper end of the valve rod 15, a limit lead screw 19 is arranged on the other side of the connecting sleeve 10, a deep groove ball bearing 17 is arranged on one side of the limit lead screw 19, a sealing pad 24 is arranged on one side of the valve rod 15, a sealing gland 23 is arranged on the upper end of the sealing pad 24, a hexagon nut C21 is arranged on the upper end of the sealing gland 23, a second flat gasket 22 is arranged between the sealing gland 23 and the hexagon nut C21, the hexagonal nut C21 is internally and threadedly connected with a sealing gland screw rod 20, the lower end of the pull rod 9 is provided with a sealing seat 25, the lower end of the sealing gasket 24 is provided with a self-sealing gasket 31, the inner side of the self-sealing gasket 31 is provided with a self-sealing sleeve 32, the lower end of the self-sealing gasket 31 is provided with a valve core pressure pad 33, the lower end of the valve core pressure pad 33 is provided with a valve core 34, one side of the self-sealing gasket 31 is provided with a valve body screw rod 28, the inner bottom of the valve body 37 is provided with a valve core seat 35, the outer side of the valve core seat 35 is provided with a valve body pressure pad 36, the valve rod 15, the valve core 34, the valve core seat 35 and the self-sealing sleeve 32 are made of stainless steel materials, and the valve body 37, the sealing seat 25, the limiting screw rod 19 and the connecting sleeve 10 are made of carbon structural steel.

In the utility model, preferably, the sealing seat 25 and the valve body 37 adopt a double-sealing structure, the double-sealing structure comprises a first sealing surface and a second sealing surface, the first sealing surface adopts a graphite metal winding pad, the second sealing surface adopts a self-sealing structure, the sealing material is a graphite nickel wire packing, the inner side of the bearing seat 2 is provided with an inner hexagonal flat end fastening screw 3, one side of the inner hexagonal flat end fastening screw 3 is provided with a bearing gland nut 4, the lower end of one side of the connecting sleeve 10 is provided with an inner hexagonal cylinder head screw 13, the upper end of the nut gland 14 is provided with a valve rod nut 12, the top of the valve rod 15 is provided with a first A-type shaft elastic check ring 11, a second A-type shaft elastic check ring 18 is arranged between the deep groove ball bearing 17 and the limit screw rod 19, the other end of the limit screw rod 19 is provided with a hexagon nut B16, the lower end of the sealing seat 25 is provided with a hexagon nut D27, a third flat washer 26 is arranged between the sealing seat 25 and the hexagon nut D27, a thrust ball bearing 8 is arranged in the other side of the bearing seat 2, a hexagonal nut E29 is arranged at the top of the valve body screw rod 28, and a standard spring washer 30 is arranged on the inner side of the hexagonal nut E29.

The working principle and the using process of the utility model are as follows: when in use, the valve body 37 and the sealing seat 25 adopt a double-sealing structure, and the valve body 37 and the sealing seat 25 of the first sealing surface adopt a graphite metal winding pad; the valve body 37 and the seal seat 25 of the second seal surface are of a self-sealing structure, the seal material is a graphite nickel wire packing, the valve core 34 of the valve core assembly is of an eight-phi 10.5 hole structure, independent processing is facilitated, a water outlet and a water inlet are opposite, flow speed is facilitated, pressure difference is not formed, the valve core 34 is small in abrasion, the service life is long, and the like, and the valve rod 15 and the valve core seat 35 form an inner closed ring and an outer closed ring, namely a cone circular linear closed ring.

The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the utility model, many simple modifications can be made to the technical solution of the utility model, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the utility model, and all fall within the scope of the utility model.

Claims

1. The utility model provides a exempt from to wash stop valve, includes valve body (37), its characterized in that: the valve is characterized in that a valve rod (15) is arranged in the middle of the valve body (37), a hand wheel (1) is arranged at the top of the valve body (37), a hexagon nut A (7) is arranged in the middle of the upper end of the hand wheel (1), a first flat gasket (5) is arranged between the hand wheel (1) and the hexagon nut A (7), a bearing seat (2) is arranged at the lower end of the hand wheel (1), a T-shaped thread sleeve (6) is connected to the inner thread of the hexagon nut A (7), pull rods (9) are arranged on two sides of the lower end of the bearing seat (2), a connecting sleeve (10) is connected to the bottom of the T-shaped thread sleeve (6), a valve rod (15) is arranged at the lower end of the connecting sleeve (10), a nut gland (14) is arranged on the outer side of the upper end of the valve rod (15), a limiting screw rod (19) is arranged on the other side of the connecting sleeve (10), a deep groove ball bearing (17) is arranged on one side of the limiting screw rod (19), a sealing gasket (24) is arranged on one side of the valve rod (15), a sealing gland (23) is arranged at the upper end of the sealing gasket (24), a hexagon nut C (21) is arranged at the upper end of the sealing gland (23), a second flat gasket (22) is arranged between the sealing gland (23) and the hexagon nut C (21), a sealing gland screw rod (20) is connected with the inner part of the hexagon nut C (21) in a threaded manner, a sealing seat (25) is arranged at the lower end of the pull rod (9), a self-sealing gasket (31) is arranged at the lower end of the sealing gasket (24), a self-sealing sleeve (32) is arranged on the inner side of the self-sealing gasket (31), a valve core pressure pad (33) is arranged at the lower end of the self-sealing gasket (31), a valve core (34) is arranged at the lower end of the valve core pressure pad (33), a valve body screw rod (28) is arranged at one side of the self-sealing gasket (31), and a valve core seat (35) is arranged at the inner bottom of the valve body (37), a valve body pressure pad (36) is arranged on the outer side of the valve core seat (35);

the sealing seat (25) and the valve body (37) adopt a double-sealing structure, the double-sealing structure comprises a first sealing surface and a second sealing surface, the first sealing surface adopts a graphite metal winding pad, the second sealing surface adopts a self-sealing structure, and the sealing material is a graphite nickel wire packing.

2. The non-flushing stop valve of claim 1, wherein the inner side of the bearing seat (2) is provided with an inner hexagonal flat end set screw (3), and one side of the inner hexagonal flat end set screw (3) is provided with a bearing gland nut (4).

3. The non-flushing stop valve as claimed in claim 1, wherein a socket head cap screw (13) is arranged at the lower end of one side of the connecting sleeve (10), a valve rod nut (12) is arranged at the upper end of the nut gland (14), and a first A-shaped shaft elastic retainer ring (11) is arranged at the top of the valve rod (15).

4. The non-flushing stop valve as claimed in claim 1, characterized in that a second A-type shaft circlip (18) is arranged between the deep groove ball bearing (17) and a limit screw rod (19), and a hexagonal nut B (16) is arranged at the other end of the limit screw rod (19).

5. The flushing-free stop valve according to claim 1, characterized in that a hexagonal nut D (27) is arranged at the lower end of the sealing seat (25), and a third flat gasket (26) is arranged between the sealing seat (25) and the hexagonal nut D (27).

6. A flush-free shut-off valve according to claim 1, characterised in that a thrust ball bearing (8) is arranged inside the other side of the bearing block (2).

7. The non-flushing stop valve of claim 1, characterized in that a hexagonal nut E (29) is arranged on the top of the valve body screw rod (28), and a standard type spring washer (30) is arranged on the inner side of the hexagonal nut E (29).