CN216768391U - A flush-free globe valve - Google Patents

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

A flush-free globe valve

technical field

The utility model relates to the technical field of a flush-free cut-off valve, in particular to a flush-free cut-off valve.

Background technique

Globe valve, also known as cut-off valve, is a mandatory sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction force between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve should be large, otherwise the failure of the top of the valve stem will occur. According to the connection method, it is divided into three types: flange connection, thread connection and welding connection. After the appearance of the self-sealing valve, the medium flow direction of the globe valve is changed from the top of the valve disc into the valve cavity. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be adjusted accordingly. decrease.

For the design of high temperature and high pressure flush-free globe valve, one looks at the sealing effect and the other is the sealing effect, that is, whether the seal leaks and whether it can be closed. The traditional non-flushing globe valve has only one sealing ring, and the sealing and sealing are poorly modified.

Utility model content

The purpose of this utility model is to provide a non-flushing shut-off valve, which has the advantages of using four The channel sealing and valve core components adopt the effect of three-channel sealing.

In order to achieve the above purpose, the present invention provides the following technical solutions: a flush-free globe valve, comprising a valve body, a valve stem is arranged in the middle of the valve body, a hand wheel is arranged on the top of the valve body, and a middle part of the upper end of the hand wheel is arranged A hexagonal nut A is provided, a first flat washer is provided between the handwheel and the hexagonal nut A, a bearing seat is provided at the lower end of the handwheel, a T-shaped threaded sleeve is threaded inside the hexagonal nut A, and the bearing Tie rods are arranged on both sides of the lower end of the 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 stem, and the other side of the connecting sleeve is A limit screw is provided, one side of the limit screw is provided with a deep groove ball bearing, one side of the valve rod is provided with a sealing gasket, the upper end of the sealing gasket is provided with a sealing gland, and the upper end of the sealing gland is provided with There is a hexagonal nut C, a second flat washer is arranged between the sealing gland and the hexagonal nut C, the hexagonal nut C is internally threaded with a sealing gland screw, the lower end of the tie rod is provided with a sealing seat, the sealing The lower end of the pad is provided with a self-sealing pad, the inner side of the self-sealing pad is provided with a self-sealing sleeve, the lower end of the self-sealing pad is provided with a valve core pressure pad, the lower end of the valve core pressure pad is provided with a valve core, and the self-sealing pad is provided with a valve core. A valve body screw rod is arranged on one side, a valve core seat is arranged at the bottom of the valve body, and a valve body pressure pad is arranged on the outside of the valve core seat.

Preferably, the sealing seat and the valve body adopt a double sealing structure, the double sealing structure includes a first sealing surface and a second sealing surface, the first sealing surface adopts a graphite metal wound gasket, and the second sealing surface adopts Self-sealing structure, and the sealing material is graphite nickel wire packing.

Preferably, the inner side of the bearing seat is provided with a hexagon socket flat end set screw, and one side of the socket socket 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 a hexagonal socket head screw, the upper end of the nut gland is provided with a valve stem nut, and the top of the valve stem is provided with a first A-type shaft retaining ring.

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

Preferably, a hexagonal nut D is arranged at the lower end of the sealing seat, and a third flat washer is arranged between the sealing seat and the hexagonal nut D.

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

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

Compared with the prior art, the utility model provides a flush-free shut-off valve, which has the following beneficial effects:

1. The valve body of the present invention adopts a cylindrical shape, and adopts a single valve core and a single valve core seat structure. The valve of this structure is free of scouring, has good sealing performance, simple structure, low cost and strong applicability. The valve core adopts eight valve cores. The hole structure is easy to process separately. The water outlet and the water inlet are on the opposite sides, which is convenient for flow rate, no pressure difference, small wear of the valve core, and long service life. The valve stem head and the valve core seat form three closed rings inside and outside. That is, a conical circular linear closed ring;

2. The utility model breaks the design concept of the traditional flush-free globe valve, adopts four seals and three closed rings in structure, and fully considers the applicability of the valve, high temperature resistance, high pressure resistance, no flushing, and sealing resistance in the use of materials and structure. , easy maintenance and other characteristics, the valve seal adopts four seals, the valve core assembly adopts three closed technology, which is worth popularizing. The valve core assembly design adopts three closed rings, and the design fully considers the structure, simple process and low cost.

Description of drawings

Fig. 1 is the structural schematic diagram of the flush-free globe valve proposed by the present utility model;

Figure 2 is a schematic diagram of the valve stem structure of the flush-free globe valve proposed by the present invention.

Description of reference numerals

1. Hand wheel; 2. Bearing seat; 3. Hexagon socket flat end set screw; 4. Bearing gland nut; 5. The first flat washer; 6. T-type threaded sleeve; 7. Hexagon nut A; 8. Thrust ball Bearing; 9. Tie rod; 10. Connecting sleeve; 11. Retaining ring for the first A-type shaft; 12. Stem nut; 13. Hexagon socket head cap screw; 14. Nut gland; 15. Valve stem; 16. Hexagon nut B; 17, deep groove ball bearing; 18, second A-type shaft retaining ring; 19, limit screw; 20, sealing gland screw; 21, hexagon nut C; 22, second flat washer ;23, sealing gland; 24, gasket; 25, sealing seat; 26, third flat washer; 27, hexagon nut D; 28, valve body screw; 29, hexagon nut E; 30, standard spring washer; 31, self-sealing gasket; 32, self-sealing sleeve; 33, valve core pressure pad; 34, valve core; 35, valve core seat; 36, valve body pressure pad; 37, valve body.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other" The orientation or positional relationship indicated by "one end" etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, It is constructed and operated in a particular orientation and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "provided with", "connected", etc., should be understood in a broad sense, for example, "connected" may be a fixed The connection can also be 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, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

1-2, the present invention provides a technical solution: a flush-free globe valve, comprising a valve body 37, a valve stem 15 is arranged in the middle of the valve body 37, a hand wheel 1 is arranged on the top of the valve body 37, and a hand wheel 1 is arranged on the top of the valve body 37. A hexagonal nut A7 is arranged in the middle of the upper end of the wheel 1, a first flat washer 5 is arranged between the handwheel 1 and the hexagonal nut A7, a bearing seat 2 is arranged at the lower end of the handwheel 1, and a T-shaped threaded sleeve 6 is threadedly connected inside the hexagonal nut A7. Tie rods 9 are arranged on both 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, and the connecting sleeve 10 is another. One side is provided with a limit screw 19, one side of the limit screw 19 is provided with a deep groove ball bearing 17, one side of the valve stem 15 is provided with a sealing gasket 24, the upper end of the sealing gasket 24 is provided with a sealing gland 23, the sealing gland 23 A hexagonal nut C21 is arranged at the upper end, a second flat washer 22 is arranged between the sealing gland 23 and the hexagonal nut C21, a sealing gland screw 20 is threadedly connected inside the hexagonal nut C21, a sealing seat 25 is arranged at the lower end of the tie rod 9, and a sealing gasket 24 The lower end 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, and the self-sealing gasket 31 One side is provided with the valve body screw 28, the inner bottom of the valve body 37 is provided with a valve core seat 35, the outside of the valve core seat 35 is provided with a valve body pressure pad 36, the valve stem 15, the valve core 34, the valve core seat 35, self-sealing The sleeve 32 is made of stainless steel, and the valve body 37, the sealing seat 25, the limit screw 19, and the connecting sleeve 10 are made of carbon structural steel.

In the present invention, preferably, the sealing seat 25 and the valve body 37 adopt a double sealing structure, and the double sealing structure includes a first sealing surface and a second sealing surface, the first sealing surface adopts a graphite metal winding gasket, and the second sealing surface adopts a self-sealing surface. The sealing structure, and the sealing material is graphite nickel wire packing, the inner side of the bearing seat 2 is provided with a hexagon socket flat end set screw 3, one side of the socket socket flat end set screw 3 is provided with a bearing gland nut 4, and the lower end of the connecting sleeve 10 side is provided A hexagon socket head screw 13 is provided, a valve stem nut 12 is provided on the upper end of the nut gland 14, a first A-type shaft elastic retaining ring 11 is provided on the top of the valve stem 15, a deep groove ball bearing 17 and a limit screw 19 are provided. There is a second A-type shaft retaining ring 18, the other end of the limit screw 19 is provided with a hexagonal nut B16, the lower end of the sealing seat 25 is provided with a hexagonal nut D27, and a third sealing seat 25 is provided between the hexagonal nut D27. The flat washer 26 is provided with a thrust ball bearing 8 on the other side of the bearing seat 2 , a hexagonal nut E29 is provided on the top of the valve body screw 28 , and a standard spring washer 30 is provided on the inner side of the hexagonal nut E29 .

The working principle and use process of the utility model: 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 wound gasket; 37 and the sealing seat 25 adopt self-sealing structure, the sealing material is made of graphite nickel wire packing, the valve core 34 of the valve core assembly adopts eight ￠10.5 hole structure, which is easy to be processed separately. No pressure difference is formed, the valve core 34 is less worn, and the service life is long.

The preferred embodiments of the present invention are described above in detail, but the present invention is not limited thereto. Within the scope of the technical concept of the present invention, a variety of simple modifications can be made to the technical solutions of the present invention, including combining various technical features in any other suitable manner. These simple modifications and combinations should also be regarded as disclosed in the present invention. content, all belong to the protection scope of the present invention.

Claims (7)

1. A non-flushing globe valve, comprising a valve body (37), characterized in that: a valve stem (15) is provided in the middle of the valve body (37), and a handwheel ( 1), a hexagonal nut A (7) is arranged in the middle of the upper end of the handwheel (1), a first flat washer (5) is arranged between the handwheel (1) and the hexagonal nut A (7), and the handwheel (1) is provided with a first flat washer (5). The lower end of the wheel (1) is provided with a bearing seat (2), the hexagonal nut A (7) is internally threaded with a T-shaped threaded sleeve (6), and both sides of the lower end of the bearing seat (2) are provided with tie rods (9) A connecting sleeve (10) is connected to the bottom of the T-type threaded sleeve (6), a valve stem (15) is arranged at the lower end of the connecting sleeve (10), and a nut gland (15) is arranged outside the upper end of the valve stem (15). 14), a limit 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 screw (19), and the valve stem (15) One side is provided with a sealing gasket (24), the upper end of the sealing gasket (24) is provided with a sealing gland (23), the upper end of the sealing gland (23) is provided with a hexagonal nut C (21), and the sealing gland (23) is provided with a hexagonal nut C (21). (23) A second flat washer (22) is arranged between the hexagonal nut C (21), the hexagonal nut C (21) is internally threadedly connected with a sealing gland screw (20), and the lower end of the tie rod (9) A sealing seat (25) is provided, 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), and the self-sealing gasket (31) ) is provided with a valve core pressure pad (33) at the lower end, a valve core (34) is set at the lower end of the valve core pressure pad (33), and a valve body screw (28) is provided on one side of the self-sealing pad (31), A valve core seat (35) is arranged at the inner bottom of the valve body (37), and 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 includes a first sealing surface and a second sealing surface, the first sealing surface adopts a graphite metal wound gasket, the second sealing surface The sealing surface adopts a self-sealing structure, and the sealing material is graphite nickel wire packing. 2. The flush-free globe valve according to claim 1, characterized in that, the inner side of the bearing seat (2) is provided with a hexagon socket flat end set screw (3), and the hexagon socket flat end set screw (3) is a A bearing gland nut (4) is provided on the side. 3. The flush-free globe valve according to claim 1, characterized in that, the lower end of one side of the connecting sleeve (10) is provided with a hexagon socket head screw (13), and the upper end of the nut gland (14) is provided with a A valve stem nut (12), the top of the valve stem (15) is provided with a first A-type shaft elastic retaining ring (11). 4. The flush-free globe valve according to claim 1, characterized in that a second A-type shaft retaining ring (18) is provided between the deep groove ball bearing (17) and the limit screw (19). ), the other end of the limit screw (19) is provided with a hexagonal nut B (16). 5 . The flush-free globe valve according to claim 1 , wherein a hexagonal nut D ( 27 ) is provided at the lower end of the sealing seat ( 25 ), and the sealing seat ( 25 ) and the hexagonal nut D ( 27 ) are arranged between the sealing seat ( 25 ) and the hexagonal nut D ( 27 ). 6 . A third flat washer (26) is arranged between them. 6 . The flush-free globe valve according to claim 1 , wherein a thrust ball bearing ( 8 ) is arranged inside the other side of the bearing seat ( 2 ). 7 . 7 . The flush-free globe valve according to claim 1 , wherein a hexagonal nut E ( 29 ) is provided on the top of the valve body screw ( 28 ), and a standard type is provided on the inner side of the hexagonal nut E ( 29 ). 8 . Spring washer (30).

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