Slide valve structure of pressure reducing valve

Abstract

The sliding valve structure of the pressure reducing valve comprises a valve element and a locking nut internally provided with an installation cavity, the valve element comprises a core body and an ejector pin which are integrally arranged, the core body and the ejector pin are coaxially arranged, an anti-disengaging ring is arranged at the end, close to the ejector pin, of the locking nut, the ejector pin penetrates out of the anti-disengaging ring, and the core body is provided with a limiting ring. A limiting table opposite to the limiting ring is arranged on the inner side wall of the locking nut, the ejector pin is further sleeved with a sealing piece located in the mounting cavity, the strength of the valve element can be effectively guaranteed through the element body and the ejector pin which are integrally and coaxially arranged, the subsequent assembling procedures are reduced, and overall assembling can be achieved through the locking nut. And meanwhile, the valve element can be limited through cooperation of the arranged limiting table and the limiting ring, reliable assembly can be guaranteed, namely the stability of the ejector pin is guaranteed after locking is conducted through the locking nut, and the inclination phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the field of pressure reducing valves, in particular to a slide valve structure of a pressure reducing valve. Background Art

[0002] The valve consists of two main structures: the valve core and the valve body. Its main function is to change the position of the valve core in the valve body by moving the valve core to change the direction of the fluid flow and to switch it on and off. There are many types of slide valves, including three-position four-way and two-position three-way. Slide valves are commonly used in steam engines, hydraulic and pneumatic devices to enable the motion mechanism to obtain a predetermined direction and stroke or to achieve automatic continuous operation. Slide valves have reliable action, good processability, balanced force on the valve core, and small operating force. They can be used in high-pressure and high-flow situations, so they are widely used. The valve core of existing slide valves is mostly in a combined form, that is, the ejector pin and the core body are processed and produced separately, and then combined together to form the valve core, as shown in the attached figure. Figure 1 and Figure 2 As shown, Figure 2 for Figure 1 The disassembly diagram of the structure is shown in Figure 1. Although the structure reduces the difficulty of production and processing, it reduces the strength of the valve core, and the coaxiality is difficult to control during the assembly process. After long-term use, it is easy to cause the ejector pin to tilt, making it difficult to ensure working reliability. In order to solve the above problems, a slide valve structure of a pressure reducing valve is proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a slide valve structure of a pressure reducing valve with high strength, practicality, reliability and simple structure.

[0004] In order to solve the above technical problems, the utility model solves the problems through the following technical solutions: a sliding valve structure of a pressure reducing valve, comprising a valve core and a locking nut with an installation cavity arranged inside, the valve core comprising an integrally arranged core body and an ejector pin, the core body and the ejector pin are coaxially arranged, an anti-slip ring is arranged at one end of the locking nut close to the ejector pin, the ejector pin passes through the anti-slip ring, the core body is provided with a limiting ring, the inner side wall of the locking nut is provided with a limiting platform opposite to the limiting ring, and the ejector pin is also sleeved with a sealing member located in the installation cavity.

[0005] Preferably, a clamping piece for clamping the seal is also provided between the ejector pin and the core body, and the outer diameter of the clamping piece is smaller than the outer diameter of the limit ring; the advantage is that the seal can be reliably clamped by the provided clamping piece to avoid leakage after sealing, and at the same time, hard collision between the valve core and the locking nut can be avoided, thereby reducing the wear of the valve core.

[0006] Furthermore, a nesting portion is provided at the end of the ejector pin close to the clamping piece, the sealing piece is sleeved on the outside of the nesting portion, and an anti-slip convex ring is fixedly provided on the end of the nesting portion away from the clamping piece; the advantage is that the sealing piece can be reliably sleeved on the outside of the ejector pin during assembly through the provided nesting portion, and the provided anti-slip convex ring can prevent the sealing piece from shaking, thereby ensuring the reliability of the seal.

[0007] Furthermore, a clamping ring is provided at one end of the clamping member close to the ejector pin, and the sealing member is in close contact with the clamping ring; the advantage is that by providing a clamping ring in close contact with the sealing member, the reliability of the clamping seal when the pressure reducing valve is sealed can be guaranteed.

[0008] Furthermore, both side surfaces of the anti-dropping convex ring are provided with inclined surfaces; the advantage is that the convenience of disassembly and assembly of the sealing component can be improved by providing the inclined surfaces, thereby improving the assembly efficiency.

[0009] Furthermore, a spacing groove is provided between the clamping member and the limiting ring; the advantage is that the contact surface between the valve core and the locking nut can be reduced by the provision of the spacing groove, thereby reducing the friction resistance while ensuring that the valve core has sufficient strength.

[0010] Preferably, the aperture of the anti-slip ring is larger than the diameter of the ejector pin and smaller than the outer diameter of the seal; the advantage is that the anti-slip ring can prevent the seal from slipping off the locking nut, while ensuring the contact area with the seal and increasing the sealing effect.

[0011] Preferably, the limit platform is provided with a chamfer; the advantage is that the provided chamfer can reduce the contact with the limit ring while ensuring the limit function, avoid forming a vacuum contact surface, reduce the separation force between the locking nut and the valve core, and facilitate disassembly.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the core body and the ejector pin are coaxially arranged in one piece, which can effectively ensure the strength of the valve core, reduce the subsequent assembly process, and realize the overall assembly through the locking nut. At the same time, the cooperation of the limit platform and the limit ring can realize the limit of the valve core, which can ensure the reliability of the explosion assembly, that is, after the locking nut is locked, the stability of the ejector pin is guaranteed and the tilting phenomenon is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1It is a schematic diagram of the existing slide valve structure;

[0015] Figure 2 for Figure 1 Disassembly diagram of

[0016] Figure 3 It is a cross-sectional schematic diagram of the slide valve structure of the utility model;

[0017] Figure 4 for Figure 3 Schematic diagram of the disassembly. DETAILED DESCRIPTION

[0018] The utility model is described in further detail below in conjunction with the accompanying drawings.

[0019] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be used for other implementation schemes, variations, improvements, equivalent schemes, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0020] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0021] As attached Figure 3 and attached Figure 4A sliding valve structure of a pressure reducing valve is shown, comprising a valve core 2 and a locking nut 1 with an installation cavity 1.1 arranged inside. The valve core 2 comprises an integrally arranged core body 2.1 and an ejector pin 2.2. The core body 2.1 and the ejector pin 2.2 are coaxially arranged. An anti-slip ring 1.2 is arranged at one end of the locking nut 1 close to the ejector pin 2.2. The ejector pin 2.2 passes through the anti-slip ring 1.2. A limiting ring 2.11 is arranged on the core body 2.1. A limiting platform 1.3 opposite to the limiting ring 2.11 is arranged on the inner side wall of the locking nut 1. The ejector pin 2.2 is also sleeved with a sealing member 3 located in the installation cavity 1.1. The integrally coaxially arranged core body 2.1 and ejector pin 2.2 can effectively ensure the strength of the valve core 2, reduce subsequent assembly processes, and achieve overall assembly through the locking nut 1. The cooperation of the limit platform 1.3 and the limit ring 2.11 can realize the limit of the valve core 2, which can ensure the reliability of the explosion assembly, that is, after the locking nut 1 is locked, the stability of the ejector 2.2 is guaranteed and the tilting phenomenon is avoided. The set seal 3 can seal the gap between the anti-slip ring 1.2 and the ejector 2.2 to ensure the sealing of the pressure reducing valve. Preferably, the limit platform 1.3 is provided with a chamfer, which can reduce the contact with the limit ring 2.11 while ensuring the limit function, avoid the formation of a vacuum contact surface, reduce the separation force between the locking nut 1 and the valve core 2, and facilitate disassembly.

[0022] On the basis of the above, a pressing piece 2.3 for pressing the sealing piece 3 is also arranged between the ejector pin 2.2 and the core body 2.1, wherein the outer diameter of the pressing piece 2.3 is smaller than the outer diameter of the limiting ring 2.11, thereby ensuring the reliable cooperation between the limiting ring 2.11 and the limiting platform 1.3, and the setting of the pressing piece 2.3 can reliably press the sealing piece 3 to avoid leakage after sealing, and can avoid hard collision between the valve core 2 and the locking nut 1, reducing the wear of the valve core 2. Preferably, the utility model has a spacing groove 2.4 between the pressing piece 2.3 and the limiting ring 2.11, and the spacing groove 2.4 can reduce the contact surface between the valve core 2 and the locking nut 1, and reduce the friction resistance while ensuring that the valve core 2 has sufficient strength.

[0023] The end of the ejector pin 2.2 of the utility model is provided with a nesting portion 2.21 near the pressing piece 2.3, and the sealing piece 3 is sleeved on the outside of the nesting portion 2.21. The end of the nesting portion 2.21 away from the pressing piece 2.3 is also fixedly provided with an anti-slip convex ring 2.22. The nesting portion 2.21 can reliably sleeve the sealing piece 3 on the outside of the ejector pin 2.2 during assembly. At the same time, the anti-slip convex ring 2.22 can prevent the sealing piece 3 from shaking, and can better translate with the valve core 2, thereby ensuring the reliability of the seal.

[0024] It is worth noting that, on the basis of the above, a clamping ring 2.31 is arranged at one end of the clamping member 2.3 close to the ejector pin 2.2, and the sealing member 3 is in close contact with the clamping ring 2.31, which can ensure the reliability of the clamping seal 3 when the pressure reducing valve is sealed.

[0025] It is worth mentioning that in order to improve the convenience of disassembly and assembly of the sealing member 3, inclined surfaces are provided on both side surfaces of the anti-dropping convex ring 2.22, thereby improving the assembly efficiency.

[0026] The aperture of the anti-slip ring 1.2 of the utility model is larger than the diameter of the ejector pin 2.2 and smaller than the outer diameter of the seal 3, thereby preventing the seal 3 from slipping off the locking nut 1, while ensuring the contact area with the seal 3 and increasing the sealing effect.

[0027] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. A slide valve structure of a pressure reducing valve, comprising a valve core and a locking nut with an installation cavity provided therein, characterized in that: The valve core includes an integrally arranged core body and an ejector pin, the core body and the ejector pin are coaxially arranged, an anti-slip ring is arranged at one end of the locking nut close to the ejector pin, the ejector pin passes through the anti-slip ring, the core body is provided with a limit ring, the inner side wall of the locking nut is provided with a limit platform opposite to the limit ring, and the ejector pin is also sleeved with a sealing member located in the installation cavity.

2. A slide valve structure of a pressure reducing valve according to claim 1, characterized in that: The valve core is also provided with a pressing piece located between the ejector pin and the core body, and the outer diameter of the pressing piece is smaller than the outer diameter of the limiting ring.

3. A slide valve structure of a pressure reducing valve according to claim 2, characterized in that: The end of the ejector pin close to the pressing piece is provided with a nesting portion, the sealing piece is sleeved on the outside of the nesting portion, and an anti-dropping convex ring is fixedly provided on one end of the nesting portion away from the pressing piece.

4. A slide valve structure of a pressure reducing valve according to claim 3, characterized in that: A pressing ring is arranged at one end of the pressing piece close to the ejector pin, and the sealing piece is in close contact with the pressing ring.

5. The slide valve structure of a pressure reducing valve according to claim 3, characterized in that: Both side surfaces of the anti-slip convex ring are provided with inclined surfaces.

6. The slide valve structure of a pressure reducing valve according to claim 2, characterized in that: A spacing groove is arranged between the pressing piece and the limiting ring.

7. The slide valve structure of a pressure reducing valve according to claim 1, characterized in that: The hole diameter of the anti-slip ring is larger than the diameter of the ejector pin and smaller than the outer diameter of the sealing element.

8. The slide valve structure of a pressure reducing valve according to claim 1, characterized in that: The limiting platform is provided with chamfers.

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