High-sealing-performance ball valve

Abstract

A sealing filler filled between a valve rod and a mounting channel comprises a sealing ring plug and an elastic compensation ring, and the sealing ring plug is provided with an annular deformation groove downwards formed from the upper end face of the sealing ring plug. The elastic compensation ring is installed in the deformation groove and comprises an inner ring piece, an outer ring piece and a plurality of V-shaped elastic pieces arranged between the inner ring piece and the outer ring piece, the inner side and the outer side of the sealing ring plug are squeezed inwards by squeezing the V-shaped elastic pieces, and the sealing filler is conveniently installed between the installation channel and the valve rod. The V-shaped elastic piece is extruded to generate elastic force expanding outwards, the elastic force extrudes the inner wall of the sealing ring plug inwards through the inner ring piece and extrudes the outer wall of the sealing ring plug outwards through the outer ring piece, so that the inner wall of the sealing ring plug is tightly attached to the valve rod, the outer wall of the sealing ring plug is tightly attached to the inner wall of the mounting channel, and the sealing performance is enhanced. The elastic force provided by the V-shaped elastic piece can effectively make up gaps generated by abrasion of the sealing ring plug, and the service life of the ball valve is effectively prolonged.

Description

Technical Field

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

[0002] Ball valve is one of the most widely used valves. It has a simple structure, reliable sealing and convenient maintenance. It is widely used in the fields of petroleum, chemical industry, metallurgy, textile, food, atomic energy, aviation, etc. The plug body is a spherical valve core, which is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. The plug body needs to be rotated by the valve stem to open or cut off the pipeline.

[0003] A ball valve usually includes a valve body, a valve core, a valve stem structure and a valve cover, wherein the valve core is arranged in the valve cavity of the valve body and is linked to the valve stem structure. The sealing performance between the valve stem structure and the valve body directly affects the service life of the ball valve. In the existing valve stem structure, the sealing effect is achieved by compressing the packing and the sealing ring, and the mounting channel of the valve body is fitted by compressing the packing and the sealing ring so that the valve stem can be rotatably connected to the valve body. However, during the long-term rotation of the valve stem, the packing, the valve stem and the valve body are constantly rubbed and worn to form a gap, so that the fluid is easy to leak directly from the gap, affecting the normal use of the ball valve. Therefore, how to enhance the sealing between the valve stem and the valve body is a technical problem to be solved in the field of ball valves. Utility Model Content

[0004] The main purpose of the utility model is to provide a high-sealing ball valve, aiming to achieve a tight connection between a valve stem and a valve body and enhance the sealing performance.

[0005] The utility model proposes a high-sealing ball valve, including a valve body, a valve core and a valve stem, the valve core is rotatably installed in the valve body, the valve stem extends into the valve body from the installation channel of the valve body, and is transmission-connected to the valve core, a sealing filler is filled between the valve stem and the installation channel, the sealing filler includes a sealing ring plug and an elastic compensation ring, the sealing ring plug is provided with an annular deformation groove opened downward from its upper end surface for the sealing ring plug to be extruded and deformed inwardly, and the elastic compensation ring is installed in the deformation groove; the elastic compensation ring includes an inner ring sheet, an outer ring sheet and a plurality of V-shaped spring sheets arranged between the inner ring sheet and the outer ring sheet.

[0006] Preferably, the inner side of the sealing ring plug is provided with multiple circles of inner sealing convex rings, the outer side of the sealing ring plug is provided with multiple circles of outer sealing convex rings, the inner wall of the mounting channel is provided with a first engaging groove adapted to the outer sealing convex ring, the outer wall of the valve stem is provided with a second engaging groove adapted to the inner sealing convex ring, the outer sealing convex ring is embedded in the first engaging groove, and the inner sealing convex ring is embedded in the second engaging groove.

[0007] Preferably, a pressure plate is installed on the valve body, and the pressure plate is provided with an upper plugging head opposite to the upper end of the sealing packing, and the upper plugging head is tightly pressed on the sealing packing.

[0008] Preferably, an energy storage plug is abutted below the sealing filler, and the energy storage plug includes a sealing lip with an annular opening groove on the lower end surface and a second V-shaped spring piece embedded in the annular opening groove.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The sealing packing filled between the valve stem and the installation channel of the high-sealing ball valve proposed by the utility model includes a sealing ring plug and an elastic compensation ring. The sealing ring plug is provided with an annular deformation groove opened downward from its upper end surface, and the deformation groove provides an extrusion space for the sealing ring plug to be extruded and deformed inwardly; the elastic compensation ring is installed in the deformation groove, and the elastic compensation ring includes an inner ring sheet, an outer ring sheet, and a plurality of V-shaped spring sheets arranged between the inner ring sheet and the outer ring sheet. The V-shaped spring sheets prop the inner ring sheet and the outer ring sheet apart, and the inner and outer sides of the sealing ring plug are squeezed inward by squeezing the V-shaped spring sheets, so that the sealing packing is easily installed between the installation channel and the valve stem. The V-shaped spring sheets are squeezed to generate an elastic force that expands outward, and the elastic force squeezes the inner wall of the sealing ring plug inward through the inner ring sheet, and squeezes the outer wall of the sealing ring plug outward through the outer ring sheet, so that the inner wall of the sealing ring plug is tightly fitted with the valve stem, and the outer wall of the sealing ring plug is tightly fitted with the inner wall of the installation channel, thereby enhancing the sealing performance. The elastic force provided by the V-shaped spring can effectively make up for the gap caused by the wear of the sealing ring plug, thereby achieving a long-term sealing effect and effectively extending the service life of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of the high-sealing ball valve of the utility model.

[0012] Figure 2 It is a cross-sectional view of the sealing packing and energy storage plug of the high-sealing ball valve of the utility model.

[0013] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0014] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout identify the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0016] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0017] Reference Figure 1 to Figure 2 The embodiment of the utility model provides a high-sealing ball valve, including a valve body 1, a spherical valve core 2 and a valve stem 3. The valve core 2 is rotatably installed in the valve body 1, and the valve stem 3 extends from the installation channel of the valve body 1 into the valve body 1 and is in driving connection with the valve core 2. A sealing packing 4 is filled between the valve stem 3 and the installation channel. An energy storage plug 5 is abutted below the sealing packing 4. A pressure plate 6 is installed on the valve body 1, and the pressure plate 6 is provided with an upper plugging portion opposite to the upper end of the sealing packing 4, and the upper plugging portion is tightly pressed on the sealing packing 4. The sealing packing 4 is squeezed into the installation channel by the pressure plate 6 and the energy storage plug 5.

[0018] The sealing packing 4 comprises a sealing ring plug 41 and an elastic compensation ring. The sealing ring plug 41 is provided with an annular deformation groove which is opened downward from its upper end surface for the sealing ring plug 41 to be squeezed and deformed inwardly. The elastic compensation ring is installed in the deformation groove.

[0019] The elastic compensation ring includes an inner ring sheet 421, an outer ring sheet 422, and a plurality of V-shaped spring sheets 423 disposed between the inner ring sheet 421 and the outer ring sheet 422. The V-shaped spring sheets 423 stretch the inner ring sheet 421 and the outer ring sheet 422 apart, and squeeze the inner and outer sides of the sealing ring plug 41 inward by squeezing the V-shaped spring sheets 423, so that the sealing packing 4 can be easily installed between the installation channel and the valve stem 1. The V-shaped spring sheets 423 are squeezed to generate an elastic force that expands outward, and the elastic force squeezes the inner wall of the sealing ring plug 41 inward through the inner ring sheet 421, and squeezes the outer wall of the sealing ring plug 41 outward through the outer ring sheet 422, so that the inner wall of the sealing ring plug 41 is tightly fitted with the valve stem 3, and the outer wall of the sealing ring plug 41 is tightly fitted with the inner wall of the installation channel, thereby enhancing the sealing performance. The elastic force provided by the V-shaped spring sheets 423 can effectively make up for the gap caused by the wear of the sealing ring plug, thereby achieving a long-term sealing effect.

[0020] At the same time, the greater the squeezing pressure on the sealing packing 4 between the inner wall of the installation channel and the valve stem 3, the more energy will be stored in the V-shaped spring piece 423, and the greater the elastic force for outward expansion will be generated, so that the inner wall of the sealing ring plug 41 and the valve stem 3, and the outer wall of the sealing ring plug 41 and the inner wall of the installation channel will fit more tightly, the anti-leakage sealing effect will be stronger and last longer, and the service life of the ball valve can be effectively extended.

[0021] In a preferred embodiment, the inner side of the sealing ring plug 41 is provided with multiple circles of inner sealing convex rings 412, the outer side of the sealing ring plug 41 is provided with multiple circles of outer sealing convex rings 411, the inner wall of the installation channel is provided with a first embedding groove adapted to the outer sealing convex ring 411, the outer wall of the valve stem 3 is provided with a second embedding groove adapted to the inner sealing convex ring 412, the outer sealing convex ring 411 is embedded in the first embedding groove, and the inner sealing convex ring 412 is embedded in the second embedding groove. Since the inner and outer sides of the sealing ring plug 41 can be squeezed toward the center, it is convenient to install the sealing ring plug 41 with the inner sealing convex ring 412 and the outer sealing convex ring 411 between the installation channel and the valve stem 3. The elastic force generated by the elastic compensation ring makes the outer sealing convex ring 411 tightly embedded in the first embedding groove, and the inner sealing convex ring 412 tightly embedded in the second embedding groove, thereby improving the sealing performance.

[0022] The energy storage plug 5 includes a sealing lip 51 with an annular opening groove 52 on the lower end surface and a second V-shaped spring piece embedded in the annular opening groove 52. The second V-shaped spring piece is squeezed between the valve stem 3 and the installation channel. The second V-shaped spring piece is squeezed to generate an elastic force that expands outward, so that the two side walls of the annular opening groove 52 are closely fitted between the valve stem 3 and the installation channel to enhance the sealing performance. The elastic force provided by the second V-shaped spring piece can effectively make up for the gap caused by the wear of the sealing lip, thereby achieving a long-term sealing effect.

[0023] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A high-sealing ball valve, comprising a valve body, a valve core and a valve stem, wherein the valve core is rotatably mounted in the valve body, the valve stem extends from the mounting channel of the valve body into the valve body and is drivingly connected to the valve core, and a sealing filler is filled between the valve stem and the mounting channel, characterized in that: The sealing filler includes a sealing ring plug and an elastic compensation ring. The sealing ring plug is provided with an annular deformation groove opened downward from its upper end surface for the sealing ring plug to be extruded and deformed inwardly, and the elastic compensation ring is installed in the deformation groove; the elastic compensation ring includes an inner ring plate, an outer ring plate and a plurality of V-shaped spring plates arranged between the inner ring plate and the outer ring plate.

2. The high sealing ball valve according to claim 1, characterized in that: The inner side of the sealing ring plug is provided with multiple circles of inner sealing convex rings, the outer side of the sealing ring plug is provided with multiple circles of outer sealing convex rings, the inner wall of the installation channel is provided with a first embedding groove adapted to the outer sealing convex ring, the outer wall of the valve stem is provided with a second embedding groove adapted to the inner sealing convex ring, the outer sealing convex ring is embedded in the first embedding groove, and the inner sealing convex ring is embedded in the second embedding groove.

3. The high sealing ball valve according to claim 1 or 2, characterized in that: A pressure plate is installed on the valve body. The pressure plate is provided with an upper plugging head portion opposite to the upper end of the sealing packing. The upper plugging head portion is tightly pressed on the sealing packing.

4. The high sealing ball valve according to claim 1 or 2, characterized in that: An energy storage plug is abutted below the sealing filler. The energy storage plug includes a sealing lip with an annular opening groove on its lower end surface and a second V-shaped spring sheet embedded in the annular opening groove.

Images