CN216112284U

CN216112284U - Ball valve with long switch life

Info

Publication number: CN216112284U
Application number: CN202122006733.4U
Authority: CN
Inventors: 罗纲
Original assignee: Eger Fluid Technology Zhejiang Co ltd
Current assignee: Eger Fluid Technology Zhejiang Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-03-22
Anticipated expiration: 2031-08-24

Abstract

The utility model discloses a ball valve with a long opening and closing service life, which comprises a valve body, a ball body and a valve rod, wherein the valve rod penetrates into the valve body and is used for controlling the rotation of the ball body, a sealing assembly is sleeved on the valve rod and comprises a locking piece, an elastic piece and a packing piece, the elastic piece is arranged between the locking piece and the packing piece, and the locking piece is used for tightly pressing the packing piece between the valve rod and the valve body. According to the utility model, through the structures and the connection relations of the locking part, the elastic part and the filler part, the filler part can realize self-sealing by utilizing medium pressure in the ball valve, and can also realize sealing by virtue of pretightening force provided by the elastic part, so that the sealing effect is greatly improved, and the service life of the switch is greatly prolonged.

Description

Ball valve with long switch life

Technical Field

The utility model relates to the technical field of valves, in particular to a ball valve with a long opening and closing service life.

Background

The ball valve is a general valve for switch, have simple in construction, the flow-through is good, the characteristic such as being convenient for switching on and off, the ball valve is mainly used for cutting off, distributing and changing the flow direction of the medium in the pipeline, it only needs to rotate 90 degrees operation and very small turning moment to close rigorously, it is most suitable for being the switch, trip valve to use, the existing ball valve generally adopts the sole polytetrafluoroethylene sleeve as the seal structure, but the existing ball valve is under the higher circumstances of pressure, the abrasion to the seal cover is serious, cause the life-span of switch often less than ten thousand times, even lower, this has limited the application range of the ball valve greatly.

SUMMERY OF THE UTILITY MODEL

The utility model provides the ball valve with long switch service life to avoid the defects in the prior art, and the sealing effect and the switch service life are improved.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a long switch life's ball valve, includes valve body, spheroid and valve rod, the valve rod penetrates in the valve body and is used for controlling spheroidal rotation, the cover is equipped with seal assembly on the valve rod, seal assembly includes retaining member, elastic component and filler piece, the elastic component sets up between retaining member and filler piece, the retaining member is used for compressing tightly the filler piece between valve rod and valve body.

In several embodiments, the valve rod is provided with external threads, the locking member is a locking nut, and the locking member and the valve rod are in threaded fit.

In several embodiments, the resilient member includes a first spring washer and a second spring washer, the second spring washer disposed over the packing member, the first spring washer disposed over the second spring washer, the first spring washer having an outer diameter greater than an outer diameter of the second spring washer.

In several embodiments, the first and second spring washers are each disc springs.

By foretell elastic component, utilize dish spring elasticity both can carry out the pretension to the packing, guarantee the leakproofness of packing under the low pressure, also can compensate the wearing and tearing of packing, after the long-time switch of ball valve, still can compress tightly the packing through dish spring elasticity, guarantee the leakproofness of packing.

In several embodiments, the packing element includes a first packing body and a second packing body which are oppositely arranged, the first packing body and the second packing body are sleeved on the valve rod, the first packing body is arranged on the upper side of the second packing body, the first packing body is provided with a first sealing surface, the second packing body is provided with a second sealing surface, the first sealing surface is attached to the second sealing surface, and the first sealing surface and the second sealing surface are both obliquely arranged.

By foretell packing, what adopt is that polytetrafluoroethylene composite graphite makes with the material of carbon fiber, has both remain PTFE's easy leakproofness, can increase PTFE's wearability again, and then improves the life that the valve rod packed for the switch life-span of ball valve improves thereupon.

In several embodiments, a sealing groove body is arranged in the valve body, the filler element is arranged in the sealing groove body, a cavity is arranged between the filler element and the inner wall of the sealing groove body, and the cavity is located on one side of the second filler element.

The utility model has the following beneficial effects:

according to the utility model, through the structures and the connection relations of the locking part, the elastic part and the filler part, the filler part can realize self-sealing by utilizing medium pressure in the ball valve, and can also realize sealing by virtue of pretightening force provided by the elastic part, so that the sealing effect is greatly improved, and the service life of the switch is greatly prolonged.

Drawings

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not to be considered limiting of the scope of the present disclosure.

FIG. 1 schematically illustrates a long switch life ball valve configuration in one embodiment;

FIG. 2 schematically illustrates an overall enlarged configuration of a long on-off life ball valve in one embodiment;

fig. 3 schematically illustrates an explosive structure of a long switch life ball valve in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.

Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of the present invention.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting and/or limiting of the utility model.

For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "relative", "front-back-left-right" and the like indicate relative or absolute arrangements, and indicate not only such arrangements in a strict sense but also a state of being relatively displaced with a tolerance or an angle or a distance to the extent that the same function can be obtained.

The structure shown in fig. 1-3, the ball valve with long service life mainly includes a valve body 10, a ball body 20, a valve rod 30 and a sealing assembly 100, wherein the valve rod 30 penetrates into the valve body 10 and is used for controlling the rotation of the ball body 20, the adjustment of a medium channel is realized by controlling the rotation of the ball body through the valve rod, and the sealing assembly 100 provides a sealing effect.

Specifically, in the present embodiment, the sealing assembly 100 includes a locking member 110, an elastic member 120, and a packing member 130, the elastic member 120 is disposed between the locking member 110 and the packing member 130, and the locking member 110 is used to compress the packing member 130 between the valve stem 30 and the valve body 10.

Wherein, be provided with the external screw thread on valve rod 30, retaining member 110 is lock nut, be screw-thread fit between retaining member 110 and the valve rod 30, adjust the pressure to the elastic component then by the position of retaining member 110 on the valve rod.

Meanwhile, the elastic member 120 includes a first spring washer 121 and a second spring washer 122, the second spring washer 122 is stacked above the packing member 130, the outer diameter of the second spring washer is substantially equal to the outer diameter of the packing member, so as to ensure the compression effect on the packing member, the first spring washer 121 is stacked above the second spring washer 122, the outer diameter of the first spring washer 121 is greater than the outer diameter of the second spring washer 122, and both the first spring washer 121 and the second spring washer 122 are disc springs.

Utilize dish spring force both can carry out the pretension to the packing, guarantee the leakproofness of packing under the low pressure, also can compensate the wearing and tearing of packing, after the long-time switch of ball valve, still can compress tightly the packing through dish spring force, guarantee the leakproofness of packing.

The packing element 130 comprises a first packing body 131 and a second packing body 132 which are oppositely arranged, the first packing body 131 and the second packing body 132 are sleeved on the valve rod 30, the first packing body 131 is arranged on the upper side of the second packing body 132, the first packing body 131 is provided with a first sealing surface 1311, the second packing body 132 is provided with a second sealing surface 1321, the first sealing surface 1311 is attached to the second sealing surface 1321, and the first sealing surface 1311 and the second sealing surface 1321 are obliquely arranged to form a shape similar to a wedge-shaped sealing surface.

First filler body and second filler body's structure, the cross-section all is the shape that is the compound rectangle portion of right trapezoid portion, laminate the cooperation as sealed face by isosceles trapezoid's hypotenuse, under the condition of two-way extrusion, realize good sealed effect, it is concrete, in the first filler body, the rectangle portion is the position that is located the short straight flange of right trapezoid portion, in the second filler body, be located the position of the long straight flange of right trapezoid portion during the rectangle portion, rectangle portion between them corresponds, it is spacing to realize the contact, avoid taking place the dislocation under the extrusion state of high pressure between the two.

The whole packing element 130 is made of polytetrafluoroethylene raw materials of composite graphite and carbon fiber, and the raw materials can be directly purchased from the market and can be molded by injection molding.

Correspondingly, a sealing groove body 101 is arranged in the valve body 10, the packing element 130 is integrally arranged in the sealing groove body 101, the second spring gasket 122 is partially or completely arranged in the sealing groove body 101, a cavity 140 is arranged between the packing element 130 and the inner wall of the sealing groove body 101, the cavity 140 is positioned at one side of the second packing element 132, namely, at one side close to the valve body and far away from the valve rod, through the structure of the cavity 140, the medium in the ball valve is introduced into the cavity, the wedge-shaped sealing surface can be opened outwards by means of the pressure of the medium, the packing element can realize a self-sealing function under the bidirectional squeezing of the medium force and the nut pressing force, the sealing effect is better under the condition of higher pressure, and the ball valve can also obtain a good sealing effect under the condition of higher pressure.

The use of the terms "a" and "an" and "the" and similar referents in the context of describing the utility model are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All manner of description herein may be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the utility model and does not pose a limitation on the scope of the utility model unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the utility model.

The present invention describes preferred embodiments, including the best mode known to the inventors for carrying out the utility model. Of course, variations of these preferred embodiments will be apparent to those skilled in the art. The inventors envision that the variations may be used as appropriate by those skilled in the art and the inventors intend for the utility model to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications encompassed within the spirit and scope of the utility model as defined by the claims. Moreover, any and all possible variations of the above-described elements are encompassed by the present invention unless otherwise indicated herein or otherwise clearly contradicted by context.

Claims

1. The utility model provides a long switch life's ball valve, includes valve body, spheroid and valve rod, the valve rod penetrates in the valve body and is used for controlling spheroidal rotation, a serial communication port, the cover is equipped with seal assembly on the valve rod, seal assembly includes retaining member, elastic component and filler piece, the elastic component sets up between retaining member and filler piece, the retaining member is used for compressing tightly the filler piece between valve rod and valve body.

2. The ball valve with long switch life according to claim 1, wherein the valve stem is provided with external threads, the locking member is a locking nut, and the locking member is in threaded fit with the valve stem.

3. A long switch-life ball valve according to claim 1, wherein said resilient member includes a first spring washer and a second spring washer, said second spring washer being disposed above said packing member, said first spring washer being disposed above said second spring washer, said first spring washer having an outer diameter greater than an outer diameter of said second spring washer.

4. A long switch-life ball valve according to claim 3, wherein said first and second spring washers are disc springs.

5. The ball valve of claim 4, wherein the packing element comprises a first packing body and a second packing body which are oppositely arranged, the first packing body and the second packing body are sleeved on the valve rod, the first packing body is arranged on the upper side of the second packing body, the first packing body is provided with a first sealing surface, the second packing body is provided with a second sealing surface, the first sealing surface is attached to the second sealing surface, and the first sealing surface and the second sealing surface are obliquely arranged.

6. A long-life ball valve according to claim 5, wherein a sealing groove is formed in the valve body, the filler element is disposed in the sealing groove, and a cavity is formed between the filler element and the inner wall of the sealing groove and is located on one side of the second filler element.