Fastening valve

Abstract

The utility model relates to the technical field of plug valves, and provides a plug valve which comprises a valve body. The plug cock is movably arranged in the valve body; the two sliding sheet assemblies are arranged in the valve body, located on the two opposite sides of the plug cock correspondingly and used for being matched with the plug cock; the sliding piece assembly comprises a first sliding piece, and the first sliding piece is arranged in the valve body and connected to the plug cock. The second slip sheet is positioned on one side, back to the cock, of the first slip sheet and is movably connected with the first slip sheet; and the elastic piece is positioned between the first slip sheet and the second slip sheet. According to the service valve, through the elastic compensation structure and the self-tightening sealing design of the split sliding piece, the sealing reliability under the high-pressure working condition is remarkably improved, and the service life of the service valve under the high-pressure working condition is remarkably prolonged.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of plug valves, in particular to a general valve. BACKGROUND

[0002] The general valve is also called a positive sealing plug valve and a poppet valve stem plug valve, mainly including core functional components such as a valve body, a valve stem, a plug, and a sliding sheet, is a valve that realizes opening and closing by rotating a conical plug body, and is widely used in high-pressure pipeline systems such as petroleum and chemical industry. Main features include: in the opening and closing process, the sealing surface of the valve body is not in contact with the sealing surface of the sliding sheet, so there is no friction and wear of the sealing surface, the service life is long, and the opening and closing torque is small; when maintaining, the valve does not need to be removed from the pipeline, only the sliding sheet needs to be replaced, and maintenance is convenient; the valve body and the plug are designed with a reduced diameter, which helps to reduce costs. In the traditional structure, the sliding sheet is designed in a whole body, and a single elastic element is used to apply sealing pressure.

[0003] As described in CN214367884U (published on October 8, 2021), the sliding sheet in the prior art is usually designed in a whole body, and a single elastic element is used to apply sealing pressure.

[0004] In the prior art, the whole body sliding sheet has poor compensation ability, and when it is deformed or worn by heat, it is easy to cause uneven distribution of sealing pressure, thereby affecting the sealing reliability of the valve in long-term use. CONTENT OF THE UTILITY MODEL

[0005] The embodiment of the present application provides a general valve, which can improve the sealing reliability of the valve in long-term use in the related art.

[0006] In a first aspect, the embodiment of the present application provides a general valve, including: a valve body; a plug, which is movably arranged in the interior of the valve body; and two sliding sheet assemblies, which are arranged in the interior of the valve body and are respectively located on opposite sides of the plug, and are used for cooperating with the plug; wherein the sliding sheet assembly includes: a first sliding sheet, which is arranged in the interior of the valve body and is connected to the plug; a second sliding sheet, which is located on a side of the first sliding sheet away from the plug and is movably connected to the first sliding sheet; and an elastic element, which is located between the first sliding sheet and the second sliding sheet.

[0007] The technical solution described above in the embodiment of the present application has at least the following technical effects: when the valve is closed, the plug and the sealing sliding sheet are first rotated by 90°, then the plug is moved downward, and the sliding sheet is pushed to extrude the valve body inner cavity sealing surface as the plug moves, thereby forming a seal. In this technology, the sliding sheet is divided into two parts, and an elastic element is arranged between the two parts. When the plug moves to extrude and push the sliding sheet, the elastic element can give extra pressure to the sliding sheet on both sides, so that the sliding sheet can better adhere to the inner wall of the valve body, thereby improving the sealing reliability of the valve.

[0008] In some embodiments, the slide assembly further comprises a limiting structure, the first slide and the second slide are movably connected by the limiting structure to allow the first slide and the second slide to move relatively in a first direction, and to limit the first slide and the second slide to move relatively in a second direction, while limiting the first slide and the second slide to rotate relatively in the axial direction of the plug; the first direction is parallel to the axial direction of the valve body, and the second direction is at an angle to the first direction.

[0009] In some embodiments, the limiting structure comprises a protruding structure provided on the first slide or the second slide, and the protruding structure forms a sliding pair with a matching groove on the other slide, and the extending direction of the protruding structure is parallel to the first direction.

[0010] In some embodiments, the elastic member is arranged in an elastic member arrangement groove between the first slide and the second slide, and the arrangement direction is parallel to the first direction, so as to allow the elastic member to apply pressure to the first slide and the second slide respectively towards the two ends of the spring and parallel to the first direction.

[0011] In some embodiments, the first slide and the second slide are provided with recessed openings at the connection positions, and the recessed openings are connected to form an elastic member arrangement groove, the elastic member arrangement groove limits the elastic member to extend in the first direction. The end surface of the recessed opening of the first slide or the second slide abutting against the elastic member is at an acute angle to the first direction, forming an inclined surface.

[0012] In some embodiments, at least one dovetail groove is provided on the connecting surface of the first slide and the plug, and the groove is provided on the first slide.

[0013] In some embodiments, a sealing member is arranged in the dovetail groove.

[0014] In some embodiments, an annular protrusion is provided on the inner wall of the dovetail groove, and the end surface of the protrusion is in the form of a circular arc, limiting the sealing member.

[0015] In some embodiments, the sealing member is a sealing strip; the cross-sectional area of the sealing strip is greater than the cross-sectional area of the sealing dovetail groove, and a protruding structure is designed on the sealing surface of the first slide and the plug to form an interference fit.

[0016] The beneficial effects of the embodiments of the present application are embodied in that the elastic member arranged between the two slides not only maintains the pre-tightening force between the two slides, but also continuously provides radial pressure during the use of the valve, so that the slide is always tightly attached to the inner wall of the valve body.

[0017] By setting sealing dovetail groove on the outer surface of the split slide and embedding sealing strip, the sealing strip is laterally expanded by the pressure provided by the plug to form self-tight sealing effect.

[0018] The overall structure design enables the valve to maintain good sealing performance and service life under high pressure and high wear conditions. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The cross-sectional structure diagram of the general valve provided in the embodiments of the present application is shown in the figure.

[0021] Figure 2 The Figure 1 The enlarged view of A in the figure.

[0022] Figure 3 The Figure 1 The enlarged view of B in the figure.

[0023] In the figure, various reference signs are as follows:

[0024] 1, valve body; 2, plug; 3, first slide; 4, second slide; 5, elastic member; 6, limiting structure; 7, elastic member mounting groove; 8, dovetail groove; 9, sealing member. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and not to limit the present application. The terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0027] It should be noted that, when an element is referred to as being "fixed" or "set up" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, specify the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0030] In the present application, "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships; for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0031] It should be noted that in the present application, the words "in some embodiments", "exemplarily", "for example" and the like are used to represent as an example, illustration or description. Any embodiment or design scheme described as "in some embodiments", "exemplarily", "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "in some embodiments", "exemplarily", "for example" and the like is intended to present the relevant concept in a specific way, meaning that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The appearance of the above words at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0032] General valve is a kind of valve that realizes fluid passage opening and closing by rotating a conical plug body, and is widely used in high-pressure pipeline systems such as petroleum, chemical industry and natural gas. Its core working principle relies on the precise fit between the plug body and the valve body, wherein the slide and the conical plug body form a key sealing pair to ensure the reliable sealing of the valve under high pressure working conditions. In the traditional general valve structure, the slide is usually designed in an integral manner, which has limitations such as uneven sealing pressure distribution and poor reliability in actual application.

[0033] Based on this, in order to improve the poor sealing reliability problem in the related art, the embodiments of the present application provide the following solutions.

[0034] Please refer to Figures 1 to 3 The general valve provided by the embodiments of the present application comprises a valve body 1, a plug 2 movably arranged in the interior of the valve body 1, and two slide assemblies arranged in the interior of the valve body 1 and located at opposite sides of the plug 2 for cooperating with the plug 2, wherein the slide assembly comprises a first slide 3 arranged in the interior of the valve body 1 and connected to the plug 2, a second slide 4 located at a side of the first slide 3 away from the plug 2 and movably connected to the first slide 3, and an elastic member 5 located between the first slide 3 and the second slide 4.

[0035] When the valve is closed, the plug 2 is first rotated by 90° to drive the first slide 3 and the second slide 4 to rotate simultaneously, and then the plug 2 is moved downward, and the two slides are pushed to the sealing surface of the valve body cavity to form a seal as the plug 2 moves. The slide is divided into two parts, and the elastic member 5 is arranged between the two divided slides. When the plug 2 moves to extrude and push the slide, the elastic member 5 arranged therebetween can give the first slide 3 and the second slide 4 on both sides extra pressure, and the pressure direction is perpendicular to the axial direction of the plug, so that the slide can be better attached to the inner wall of the valve body, thereby improving the sealing reliability of the valve.

[0036] As can be seen from the above, the general valve provided by the embodiments of the present application can give greater pressure to the sealing surface on both sides when the plug rotates, so that the valve can obtain higher sealing reliability.

[0037] In some embodiments, please refer to Figure 1 The slide assembly further comprises a limiting structure 6, the first slide 3 and the second slide 4 are movably connected through the limiting structure 6 to allow the first slide 3 and the second slide 4 to move relatively in a first direction, and to limit the relative movement of the first slide 3 and the second slide 4 in a second direction; the first direction is parallel to the axial direction of the valve body 1, and the second direction is at an angle to the first direction. The limiting structure 6 comprises a protruding structure arranged on the first slide 3 or the second slide 4, and the protruding structure and a matching groove on the other slide form a sliding pair, and the extension direction of the protruding structure is parallel to the first direction.

[0038] When the tap is rotated, the first sliding plate 3 and the second sliding plate 4 are rotated, and if there is no limiting structure 6, the first sliding plate 3 and the second sliding plate 4 will be offset in the second direction, resulting in poor sealing of the sealing surface. The tenon joint structure allows the first sliding plate 3 and the second sliding plate 4 to only move perpendicular to the axial direction of the tap.

[0039] In this way, unnecessary directional movement is avoided, and the elastic compensation force of the elastic member 5 can be effectively transmitted.

[0040] Optionally, in some embodiments, referring to Figure 1 , the elastic member 5 is arranged in the elastic member arrangement groove 7 between the first sliding plate 3 and the second sliding plate 4, and the placement direction is parallel to the first direction, so as to allow the elastic member 5 to respectively apply pressure to the first sliding plate 3 and the second sliding plate 4 towards the two ends of the spring and parallel to the first direction. The first sliding plate 3 and the second sliding plate 4 are connected and have concave openings connected to form the elastic member arrangement groove 7, which limits the elastic member 5 to extend and retract along the first direction. The end surface of the first sliding plate 3 or the second sliding plate 4 in the concave opening abutting against the elastic member 5 forms an acute angle with the first direction, forming an inclined surface.

[0041] The elastic member 5 can be a wave-shaped compression spring or a butterfly-shaped compression spring or other elastic elements, and can be one or multiple groups in parallel. The end surface of the first sliding plate 3 or the second sliding plate 4 in the concave opening abutting against the elastic member 5 adopts an inclined surface design, and the pre-pressed spring on the inclined surface can generate a continuous pre-tightening force, which is more suitable for the vibration environment during the operation of the tap.

[0042] Optionally, referring to Figures 1 to 3 , the connecting surface of the first sliding plate 3 and the tap 2 is provided with at least one dovetail groove 8, and the groove is located on the first sliding plate 3. The dovetail groove 8 is arranged with a sealing element 9. The inner wall of the dovetail groove 8 is provided with an annular protrusion, and the end surface of the protrusion is a circular arc type, which limits the sealing element 9. The sealing element 9 is a sealing strip; the cross-sectional area of the sealing strip is greater than the cross-sectional area of the sealing dovetail groove 8, and a protruding structure is designed on the sealing surface of the first sliding plate 3 and the tap 2 to form an interference fit. When the tap 2 is closed, the tap surface directly extrudes the first sliding plate 3, and the small protrusion of the sealing strip is extruded and deformed to provide extra elastic force, and the force direction is perpendicular to the axial direction of the tap 2, which provides good sealing performance for the sealing surface between the first sliding plate 3 and the tap 2.

[0043] At the same time, by arranging the sealing strip on the connecting surface of the tap 2 and the first sliding plate 3, the slight vibration generated during the operation of the tap 2 can be absorbed, and the elastic member 5 forms a double sealing compensation structure.

[0044] The above only describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pilot valve characterized by, include: Valve body (1); A stopcock (2) is movably disposed inside the valve body (1); as well as Two sliding vane assemblies are disposed inside the valve body (1) and located on opposite sides of the plug (2) respectively, for cooperating with the plug (2); The slider assembly includes: The first sliding plate (3) is connected to the stopcock (2); The second slide (4) is located on the side of the first slide (3) facing away from the stopcock (2) and is movably connected to the first slide (3); and The elastic element (5) is located between the first slider (3) and the second slider (4).

2. The general service valve of claim 1, wherein: The slide assembly further includes a limiting structure (6), through which the first slide (3) and the second slide (4) are movably connected to each other, so as to allow the first slide (3) and the second slide (4) to move relative to each other in a first direction and restrict the first slide (3) and the second slide (4) to move relative to each other in a second direction, while restricting the first slide (3) and the second slide (4) to rotate relative to each other in the axial direction of the valve (2); the first direction is perpendicular to the axial direction of the valve (2), and the second direction is at an angle to the first direction.

3. The general service valve of claim 2 wherein: The limiting structure (6) includes a protrusion structure provided on the first slide (3) or the second slide (4), the protrusion structure forming a sliding pair with the mating groove on the other slide, and the protrusion extending in a direction parallel to the first direction.

4. The general service valve of claim 2 wherein: The elastic element (5) is placed in the elastic element placement groove (7) between the first slide (3) and the second slide (4), and its placement direction is parallel to the first direction, so that the elastic element (5) can apply pressure to the first slide (3) and the second slide (4) respectively towards the two ends of the spring and parallel to the first direction.

5. The general valve according to claim 4, characterized in that: The first slider (3) and the second slider (4) are connected by a concave opening and the concave openings are connected to form an elastic element placement groove (7). The elastic element placement groove (7) limits the elastic element (5) so that its extension and retraction direction is set along the first direction. The end face of the first slider (3) or the second slider (4) that abuts against the elastic element (5) forms an acute angle with the first direction, forming a slope.

6. The general's valve according to any one of claims 1 to 5, characterized in that: At least one dovetail groove (8) is provided on the connection surface between the first slide (3) and the stopcock (2), and the groove is located on the first slide (3).

7. The general valve according to claim 6, characterized in that: The dovetail groove (8) is fitted with a sealing element (9).

8. The general valve according to claim 7, characterized in that: The inner wall of the dovetail groove (8) is provided with an annular protrusion, the end face of which is arc-shaped and serves to limit the sealing element (9).

9. The general valve according to claim 8, characterized in that: The sealing element (9) is a sealing strip; the cross-sectional area of ​​the sealing strip is larger than the cross-sectional area of ​​the sealing dovetail groove (8), and a raised structure is designed on the sealing surface of the first sliding plate (3) and the plug (2) to form an interference fit.

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