Ball valve with adjustable pretightening force

Abstract

The utility model relates to a ball valve with adjustable pretightening force, which comprises a valve cover, a valve core, a back ring, a first compression ring, a second compression ring and an adjusting screw, the valve cover is provided with an inner cavity, and the valve core, the back ring, the first compression ring and the second compression ring are arranged in the inner cavity; the second pressing ring makes contact with the valve element. The adjusting screw is connected with the back ring, the first pressing ring is arranged between the back ring and the second pressing ring, the back face of the first pressing ring makes contact with the back ring, and the front face of the first pressing ring makes contact with the second pressing ring. The adjusting screw is configured to be screwed so that the adjusting screw can apply force to the first pressing ring, the first pressing ring extrudes the second pressing ring when moving, and the second pressing ring tightly presses the valve element.

Description

Technical Field

[0001] This utility model relates to the field of valve bodies, specifically to a ball valve with adjustable preload. Background Technology

[0002] Currently, ball valves on the market mainly consist of a control element and a stem. The control element (ball) is driven by the stem and rotates around the valve's axis. They can also be used for fluid regulation and control. Hard-seal V-type ball valves, with their V-shaped ball core and hard alloy-faced metal seat, possess strong shearing force, making them particularly suitable for media containing fibers or small solid particles. Multi-port ball valves can flexibly control the merging, splitting, and switching of flow directions in pipelines, and can also close any channel while connecting the other two. These valves should generally be installed horizontally in pipelines. Ball valves are classified according to their actuation method: pneumatic ball valves, electric ball valves, and manual ball valves. However, with increased use, the control element may loosen, and the main solution to this problem is to replace the ball valve, which is relatively wasteful. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a ball valve with adjustable preload.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a ball valve with adjustable preload, comprising: a valve cover, a valve core, a back ring, a first pressure ring, a second pressure ring, and an adjusting screw. The valve cover has an inner cavity, and the valve core, the back ring, the first pressure ring, and the second pressure ring are disposed in the inner cavity. The second pressure ring contacts the valve core. The adjusting screw is connected to the back ring, and the first pressure ring is disposed between the back ring and the second pressure ring, with the back side of the first pressure ring contacting the back ring and the front side of the first pressure ring contacting the second pressure ring. The adjusting screw is configured to apply force to the first pressure ring when the adjusting screw is turned, and the first pressure ring presses against the second pressure ring when it moves, thereby pressing the valve core.

[0005] Furthermore, the inner wall of the valve cover cavity is provided with an internal thread, and the back ring is provided with an external thread. The back ring is fixedly installed in the inner cavity of the valve cover by means of internal and external thread connection.

[0006] Furthermore, it also includes a compression spring, which is disposed between the first pressure ring and the second pressure ring. When the first pressure ring is compressed, it squeezes the compression spring. By rotating the adjusting screw forward or backward, the compression force on the compression spring is increased or decreased.

[0007] Furthermore, the second pressure ring is provided with a second mounting hole, a portion of the compression spring is installed in the second mounting hole, and another portion of the compression spring extends out of the second mounting hole, with the portion of the compression spring extending out of the second mounting hole abutting against the first pressure ring.

[0008] Furthermore, the back ring is provided with a preset number of first mounting holes, the first mounting holes passing through the back ring, the adjusting screw is adapted to the first mounting hole, and the length of the adjusting screw is greater than the length of the first mounting hole. The adjusting screw is inserted into the first mounting hole and presses against the first pressure ring. By rotating the adjusting screw clockwise or counterclockwise, the force applied by the adjusting screw to the first pressure ring is increased or decreased.

[0009] Furthermore, the inner wall of the first mounting hole is provided with an internal thread, and the adjusting screw has an external thread. The adjusting screw is screwed into the first mounting hole by means of internal and external thread connection, and at least a part of the adjusting screw can extend out of the first mounting hole. When at least a part of the adjusting screw extends out of the first mounting hole, the adjusting screw presses against the first pressure ring.

[0010] Furthermore, the first mounting hole of the back ring has a first axis, the back ring has a second axis, and there is a preset angle between the first axis and the second axis, so that the first mounting hole is inclined relative to the second axis of the back ring.

[0011] The beneficial effects of this application are as follows: The adjustable preload ball valve provided by this application has a simple structure and is easy to assemble and disassemble. By turning the adjusting screw, the adjusting screw squeezes the first pressure ring, the first pressure ring squeezes the compression spring, so that the compression spring has a compressive force. The compression spring squeezes the second pressure ring, and the second pressure ring presses against the valve core. By turning the adjusting screw forward or backward, the compressive force in the compression spring is increased or decreased, thereby increasing or decreasing the force of the second pressure ring pressing on the valve core, thus achieving the effect of adjustable valve core preload. When the force applied to the valve core by the second pressure ring increases, the force required to rotate the valve core will also increase, thereby effectively solving the problem of valve core loosening after repeated use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a ball valve with adjustable preload provided by this utility model.

[0013] Figure 2 for Figure 1 The image shows a magnified view of a ball valve with adjustable preload at point A.

[0014] Figure 3A schematic diagram of the back ring of a ball valve with adjustable preload provided by this utility model. Detailed Implementation

[0015] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0016] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0017] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0018] Please refer to Figure 1-3 This application provides an adjustable preload ball valve (hereinafter referred to as "the ball valve"), which includes: a valve cover 1, a valve core 2, a back ring 3, a first pressure ring 4, a second pressure ring 5, and an adjusting screw 6. The valve cover 1 has an inner cavity 100, in which the valve core 2, the back ring 3, the first pressure ring 4, and the second pressure ring 5 are disposed. The second pressure ring 5 is in contact with the valve core 2. The adjusting screw 6 is connected to the back ring 3. The first pressure ring 4 is disposed between the back ring 3 and the second pressure ring 5, with the back side of the first pressure ring 4 in contact with the back ring 3 and the front side of the first pressure ring 4 in contact with the second pressure ring 5. The adjusting screw 6 is configured to apply force to the first pressure ring 4 when the adjusting screw 6 is turned, and the first pressure ring 4 presses against the second pressure ring 5 when it moves, thereby pressing the valve core 2.

[0019] In one embodiment of this application, the inner wall of the inner cavity 100 of the valve cover 1 is provided with an internal thread, and the back ring 3 is provided with an external thread. The back ring 3 is fixedly installed in the inner cavity 100 of the valve cover 1 by means of internal and external thread connection.

[0020] In one embodiment of this application, the ball valve further includes a compression spring 7, which is disposed between the first pressure ring 4 and the second pressure ring 5. When the first pressure ring 4 is compressed, it squeezes the compression spring 7. By rotating the adjusting screw 6 forward or backward, the compression force on the compression spring 7 increases or decreases.

[0021] In one embodiment of this application, the second pressure ring 5 is provided with a second mounting hole 50, a part of the compression spring 7 is installed in the second mounting hole 50, another part of the compression spring 7 extends out of the second mounting hole 50, and the part of the compression spring 7 extending out of the second mounting hole 50 abuts against the first pressure ring 4.

[0022] In one embodiment of this application, the back ring 3 is provided with a predetermined number of first mounting holes 30, the first mounting holes 30 passing through the back ring 3, the adjusting screw 6 is adapted to the first mounting holes 30, and the length of the adjusting screw 6 is greater than the length of the first mounting hole 30. The adjusting screw 6 is inserted into the first mounting hole 30 and presses against the first pressure ring 4. By rotating the adjusting screw 6 clockwise or counterclockwise, the force applied by the adjusting screw 6 to the first pressure ring 4 increases or decreases.

[0023] In one embodiment of this application, the inner wall of the first mounting hole 30 is provided with an internal thread, and the adjusting screw 6 has an external thread. The adjusting screw 6 is screwed into the first mounting hole 30 by means of internal and external thread connection, and at least a part of the adjusting screw 6 can extend out of the first mounting hole 30. When at least a part of the adjusting screw 6 extends out of the first mounting hole 30, the adjusting screw 6 presses against the first pressure ring 4.

[0024] In one embodiment of this application, the first mounting hole 30 of the back ring 3 has a first axis 300, the back ring 3 has a second axis 31, and there is a preset included angle between the first axis 300 and the second axis 31, so that the first mounting hole 30 is inclined relative to the second axis 31 of the back ring 3.

[0025] The adjustable preload ball valve provided in this application has a simple structure and is easy to assemble and disassemble. By turning the adjusting screw, the adjusting screw squeezes the first pressure ring, which in turn squeezes the compression spring, creating a compressive force in the spring. The compression spring then squeezes the second pressure ring, which presses against the valve core. By turning the adjusting screw clockwise or counterclockwise, the compressive force in the spring increases or decreases, thereby increasing or decreasing the force exerted by the second pressure ring on the valve core, thus achieving the effect of adjustable valve core preload. When the force exerted by the second pressure ring on the valve core increases, the force required to rotate the valve core also increases, effectively solving the problem of valve core loosening after repeated use.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A ball valve with adjustable preload, characterized in that, include: The valve cover comprises a valve core, a back ring, a first pressure ring, a second pressure ring, and an adjusting screw. The valve cover has an inner cavity in which the valve core, the back ring, the first pressure ring, and the second pressure ring are disposed. The second pressure ring contacts the valve core. The adjusting screw is connected to the back ring. The first pressure ring is disposed between the back ring and the second pressure ring, with its back side contacting the back ring and its front side contacting the second pressure ring. The adjusting screw is configured to apply force to the first pressure ring when turned, causing the first pressure ring to press against the second pressure ring as it moves, thus pressing the valve core against the second pressure ring.

2. The ball valve with adjustable preload according to claim 1, characterized in that, The inner wall of the valve cover cavity is provided with an internal thread, and the back ring is provided with an external thread. The back ring is fixedly installed in the inner cavity of the valve cover by means of internal and external thread connection.

3. The ball valve with adjustable preload according to claim 2, characterized in that, It also includes a compression spring, which is disposed between the first pressure ring and the second pressure ring. When the first pressure ring is compressed, it squeezes the compression spring. By rotating the adjusting screw forward or backward, the compression force on the compression spring increases or decreases.

4. The ball valve with adjustable preload according to claim 3, characterized in that, The second pressure ring is provided with a second mounting hole. A part of the compression spring is installed in the second mounting hole, and another part of the compression spring extends out of the second mounting hole. The part of the compression spring extending out of the second mounting hole abuts against the first pressure ring.

5. The ball valve with adjustable preload according to claim 4, characterized in that, The back ring is provided with a preset number of first mounting holes, the first mounting holes passing through the back ring, the adjusting screw is adapted to the first mounting hole, and the length of the adjusting screw is greater than the length of the first mounting hole. The adjusting screw is inserted into the first mounting hole and presses against the first pressure ring. By rotating the adjusting screw clockwise or counterclockwise, the force applied by the adjusting screw to the first pressure ring is increased or decreased.

6. The ball valve with adjustable preload according to claim 5, characterized in that, The inner wall of the first mounting hole is provided with an internal thread, and the adjusting screw has an external thread. The adjusting screw is screwed into the first mounting hole by means of internal and external thread connection, and at least a part of the adjusting screw can protrude from the first mounting hole. When at least a part of the adjusting screw protrudes from the first mounting hole, the adjusting screw presses against the first pressure ring.

7. The ball valve with adjustable preload according to claim 6, characterized in that, The first mounting hole of the back ring has a first axis, and the back ring has a second axis. There is a preset angle between the first axis and the second axis, so that the first mounting hole is inclined relative to the second axis of the back ring.

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