Self-centering anti-clamping hydraulic valve element and hydraulic valve

Abstract

The utility model relates to the technical field of hydraulic valve structures, and discloses a self-centering anti-clamping hydraulic valve core and a hydraulic valve, the self-centering anti-clamping hydraulic valve core comprises a hydraulic valve body, the right side of the hydraulic valve body is fixedly connected with an output flange pipe, the hydraulic valve body is provided with a self-centering protection mechanism, and the self-centering protection mechanism comprises an inner partition plate and a hollow cylinder. Through the design of the second pressure oil connecting pipe, the second pressure oil connecting pipe can be connected with an external hydraulic valve pressure oil system, pressure oil is output to the first pressure oil connecting pipe, and in the process that the valve element body is promoted to stretch, the pressure oil can be synchronously conveyed to the interior of the hollow cylinder from the second pressure oil connecting pipe; the sealing sliding piece is driven to slide in the inner cavity of the hollow cylinder, so that the inner wall of the alloy centering sleeve is attached to the outer wall of the valve element body, the valve element body in the stretching state is centered and supported, and the problem that the valve element body is prone to generating the eccentric condition due to impact pressure of media is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valve structures, and in particular to a self-centering anti-jamming hydraulic valve core and a hydraulic valve. Background Art

[0002] A hydraulic valve is an automatic component operated by pressure oil. It is controlled by the pressure oil of a pressure regulating valve and is usually used in combination with an electromagnetic pressure regulating valve. It can be used to remotely control the on / off of the oil, gas, and water pipeline systems of a hydropower station. It is often used for clamping, controlling, lubricating, and other oil circuits. There are direct-acting and pilot-operated types, with the pilot type being the most common. Generally, there is a valve core inside a hydraulic valve. The valve core is a valve part that the valve body uses to move to achieve the basic functions of direction control, pressure control, or flow control.

[0003] A Chinese patent discloses a mechanical hydraulic valve core with a publication number of CN219062442U. The technical solution disclosed in the patent document is as follows: an oil chamber is opened at the upper end of the valve seat, a piston block is matched in the oil chamber, a valve core rod is fixed to the lower end of the piston block, a valve core plate is fixed to the lower end of the valve core rod, a liquid inlet is opened at the lower end of the valve body, a valve core plug matching the liquid inlet is connected to the lower end of the valve core plate, a liquid outlet communicating with the liquid inlet is opened at the right end of the valve body, an elastic sealing sleeve is provided on the outer periphery of the valve core plug, and the elastic sealing sleeve is connected between the lower end of the valve core plate and the bottom end of the valve seat.

[0004] In order to solve the problem that it is difficult to accurately adjust the opening and closing degree of the valve core plug in the existing structure, the existing technology adopts the method of designing components such as telescopic rulers to deal with it. However, there is still a situation where the valve core cannot be centered. During the use of the valve core, it is easy to be impacted by the medium and become eccentric, which makes the valve core easy to get stuck and affects the normal operation of the hydraulic valve. Utility Model Content

[0005] The utility model aims to provide a self-centering anti-jamming hydraulic valve core and a hydraulic valve, so as to solve the problem in the prior art that the valve core is easily impacted by the medium and thus produces eccentricity.

[0006] The utility model provides the following technical solutions: a self-centering anti-jamming hydraulic valve core, comprising a hydraulic valve body, the right side of the hydraulic valve body is fixedly connected to an output flange pipe, the hydraulic valve body is provided with a self-centering protection mechanism, the self-centering protection mechanism comprises an inner partition and a hollow cylinder, the inner partition is fixedly mounted on the inner wall of the hydraulic valve body, the inner wall of the inner partition is slidably connected with a valve core body, the hollow cylinder is fixedly mounted on the side of the inner wall of the hydraulic valve body and is located below the inner partition, a reset elastic member is fixedly mounted on the inner wall of the hollow cylinder, and one end of the reset elastic member away from the inner wall of the hollow cylinder is fixed A sealing slide is connected, and the outer wall of the sealing slide is slidably connected to the inner wall of the hollow cylinder. The side of the sealing slide away from the reset elastic member extends to the side of the hollow cylinder and is fixedly connected with an alloy centering sleeve. The inner wall of the alloy centering sleeve is slidably connected to the outer wall of the valve core body. The side of the hollow cylinder is fixedly connected with a No. 2 pressure oil connecting pipe, and the end of the No. 2 pressure oil connecting pipe away from the hollow cylinder extends to the side of the hydraulic valve body. Pressure oil can be added to the hollow cylinder from the No. 2 pressure oil connecting pipe, which prompts the sealing slide to move, driving the alloy centering sleeve to fit the outer wall of the valve core body, and performing centering support treatment on the valve core body.

[0007] As a preferred embodiment of the above technical solution, a raised sleeve is fixedly connected to the top of the inner partition, a rubber sleeve is fixedly connected to the inner wall of the raised sleeve, the inner wall of the rubber sleeve is slidably connected to the outer wall of the valve core body, a return spring is fixedly connected to the top of the valve core body, and the top of the return spring is fixedly connected to the top of the inner wall of the hydraulic valve body, and the sealing between the valve core body and the inner partition is increased by the cooperation of the raised sleeve and the rubber sleeve.

[0008] As a preferred embodiment of the above technical solution, the self-centering protection mechanism also includes a No. 1 pressure oil connecting pipe, a bottom sealing plate and a fixed sleeve. The No. 1 pressure oil connecting pipe is fixedly connected to the top of the hydraulic valve body. A rubber frame is fixedly connected to the outer wall of the bottom sealing plate. The outer wall of the rubber frame is movably connected to the inner wall of the hydraulic valve body. The rubber frame is used to improve the sealing between the bottom sealing plate and the hydraulic valve body.

[0009] As a preferred embodiment of the above technical solution, a rubber ring 1 is fixedly connected to the top of the bottom sealing plate, and the top of the rubber ring 1 is movably connected to the bottom of the valve core body, and a rubber ring 2 is fixedly connected to the inner wall of the bottom sealing plate, and the inner wall of the rubber ring 2 is movably connected to the outer wall of the valve core body, and the sealing between the valve core body and the bottom sealing plate is increased by rubber rings 1 and 2.

[0010] As a preferred embodiment of the above technical solution, the fixing sleeve is fixedly installed on the outer wall of the hydraulic valve body, the outer wall of the fixing sleeve is threadedly connected with a bolt member, the bottom of the bottom sealing plate is welded with a plug-in arm, the upper part of the plug-in arm is movably plugged into the inner cavity of the fixing sleeve, and the threaded end of the bolt member is movably connected to the outer wall of the upper part of the plug-in arm. Through the cooperation of the fixing sleeve, the bolt member and the plug-in arm, it is convenient for users to disassemble and maintain the bottom sealing plate.

[0011] As a preferred embodiment of the above technical solution, the bottom of the bottom sealing plate is fixedly connected to an input flange pipe, a circular partition is fixedly installed on the inner wall of the input flange pipe, the top of the circular partition is fixedly connected to a material barrel, and the medium is input into the hydraulic valve body from the input flange pipe.

[0012] As a preferred embodiment of the above technical solution, a square hole is opened on the outer wall of the material passing barrel, and a cross grid piece is fixedly installed on the inner wall of the square hole, and the cross grid piece is used to separate the inner cavity of the square hole to improve the filtering effect.

[0013] A hydraulic valve comprises the self-centering, anti-jamming hydraulic valve core described above.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model can be connected with an external hydraulic valve pressure oil system through the design of a No. 2 pressure oil connecting pipe. In the process of outputting pressure oil to the No. 1 pressure oil connecting pipe to cause the valve core body to extend, pressure oil can be simultaneously delivered from the No. 2 pressure oil connecting pipe to the inside of the hollow cylinder, causing the sealing sliding member to slide in the inner cavity of the hollow cylinder, so that the inner wall of the alloy centering sleeve fits with the outer wall of the valve core body, and the valve core body in the extended state is centering and supported, so as to avoid the problem of eccentricity of the valve core body due to the impact pressure of the medium, avoid the valve core body from being stuck, and ensure the normal operation of the hydraulic valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the hydraulic valve body of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the hollow cylinder of the utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure between the bottom sealing plate and the valve core body of the utility model;

[0020] Figure 5 This is a schematic diagram of the positioning and connection structure of the bottom sealing plate of the utility model;

[0021] Figure 6 It is a schematic diagram of the cutaway structure of the input flange pipe of the utility model.

[0022] In the figure: 1. hydraulic valve body; 11. output flange pipe; 2. self-centering protection mechanism; 21. inner partition; 211. raised sleeve; 212. rubber sleeve; 22. valve core body; 23. reset spring; 24. No. 1 pressure oil connecting pipe; 25. hollow cylinder; 251. No. 2 pressure oil connecting pipe; 252. reset elastic member; 253. sealing slide; 254. alloy centering sleeve; 26. bottom sealing plate; 261. rubber ring 1; 2611. rubber ring 2; 262. rubber frame; 263. fixing sleeve; 264. bolt member; 265. plug-in arm; 266. input flange pipe; 267. round partition; 268. barrel; 269. square hole; 2691. cross grid member. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Embodiment 1

[0025] like Figure 1-Figure 3As shown, the utility model provides a technical solution: a self-centering anti-jamming hydraulic valve core, including a hydraulic valve body 1, an output flange pipe 11 is fixedly connected to the right side of the hydraulic valve body 1, a self-centering protection mechanism 2 is arranged on the hydraulic valve body 1, the self-centering protection mechanism 2 includes an inner baffle 21 and a hollow cylinder 25, the inner baffle 21 is fixedly installed on the inner wall of the hydraulic valve body 1, a valve core body 22 is slidably connected to the inner wall of the inner baffle 21, the hollow cylinder 25 is fixedly installed on the side of the inner wall of the hydraulic valve body 1 and is located below the inner baffle 21, a reset elastic member 252 is fixedly installed on the inner wall of the hollow cylinder 25, one end of the reset elastic member 252 away from the inner wall of the hollow cylinder 25 is fixedly connected to a sealing slide 253, the outer wall of the sealing slide 253 is slidably connected to the inner wall of the hollow cylinder 25, and the side of the sealing slide 253 away from the reset elastic member 252 extends to the hollow cylinder 25. An alloy centering sleeve 254 is fixedly connected to the side of the core cylinder 25, and the inner wall of the alloy centering sleeve 254 is slidably connected to the outer wall of the valve core body 22. A No. 2 pressure oil connecting pipe 251 is fixedly connected to the side of the hollow cylinder 25, and the No. 2 pressure oil connecting pipe 251 extends from one end of the hollow cylinder 25 to the side of the hydraulic valve body 1. The ends of the No. 1 pressure oil connecting pipe 24 and the No. 2 pressure oil connecting pipe 251 are pre-connected to the external hydraulic valve pressure oil system, and pressure oil is delivered to the hydraulic valve body 1 from the No. 1 pressure oil connecting pipe 24 to cause the valve core body 22 to extend. At the same time, pressure oil can be synchronously delivered to the inside of the hollow cylinder 25 from the No. 2 pressure oil connecting pipe 251, so that the inner wall of the alloy centering sleeve 254 fits with the outer wall of the valve core body 22, and the valve core body 22 in the extended state is centering and supported, thereby improving the stability of the valve core body 22.

[0026] As an implementation method in this embodiment, Figure 4 As shown, a raised sleeve 211 is fixedly connected to the top of the inner partition 21, a rubber sleeve 212 is fixedly connected to the inner wall of the raised sleeve 211, the inner wall of the rubber sleeve 212 is slidably connected to the outer wall of the valve core body 22, a reset spring 23 is fixedly connected to the top of the valve core body 22, the top of the reset spring 23 is fixedly connected to the top of the inner wall of the hydraulic valve body 1, the self-centering protection mechanism 2 also includes a No. 1 pressure oil connecting pipe 24, a bottom sealing plate 26 and a fixed sleeve 263, the No. 1 pressure oil connecting pipe 24 is fixedly connected to the top of the hydraulic valve body 1, a rubber frame 262 is fixedly connected to the outer wall of the bottom sealing plate 26, the outer wall of the rubber frame 262 is movably connected to the inner wall of the hydraulic valve body 1, the connection between the bottom sealing plate 26 and the valve core body 22 can be sealed by the cooperation of the rubber ring 1 261 and the rubber ring 2 2611, and the connection between the bottom sealing plate 26 and the hydraulic valve body 1 can be sealed by the design of the rubber frame 262.

[0027] As an implementation method in this embodiment, Figure 5 and Figure 6As shown, a rubber ring 261 is fixedly connected to the top of the bottom sealing plate 26, and the top of the rubber ring 261 is movably connected to the bottom of the valve core body 22. A rubber ring 2611 is fixedly connected to the inner wall of the bottom sealing plate 26, and the inner wall of the rubber ring 2611 is movably connected to the outer wall of the valve core body 22. A fixed sleeve 263 is fixedly installed on the outer wall of the hydraulic valve body 1, and a bolt member 264 is threadedly connected to the outer wall of the fixed sleeve 263. A plug-in arm 265 is welded to the bottom of the bottom sealing plate 26, and the upper half of the plug-in arm 265 is movably plugged into the inner cavity of the fixed sleeve 263. The threaded end of the bolt member 264 is movably connected to the outer wall of the upper half of the plug-in arm 265. An input flange pipe 266 is fixedly connected to the bottom of the bottom sealing plate 26, and a circular partition is fixedly installed on the inner wall of the input flange pipe 266 267, the top of the circular partition 267 is fixedly connected to a material passing barrel 268, a square hole 269 is opened on the outer wall of the material passing barrel 268, and a cross grid piece 2691 is fixedly installed on the inner wall of the square hole 269. When the bottom sealing plate 26 is plugged into the bottom of the hydraulic valve body 1, the plug-in arm 265 will be plugged into the inner cavity of the fixing sleeve 263. The bottom sealing plate 26 can be positioned as a whole by tightening the bolt 264, which is convenient for users to disassemble and maintain the bottom sealing plate 26. Through the cooperation of the circular partition 267, the material passing barrel 268 and the square hole 269, the medium entering the hydraulic valve body 1 can be filtered to avoid the problem that the medium easily causes blockage of the inner cavity of the hydraulic valve body 1. Through the design of the cross grid piece 2691, the inner cavity of the square hole 269 can be separated to further improve the filtering effect.

[0028] Embodiment 2

[0029] The hydraulic valve proposed in the second embodiment of the present application includes the above-mentioned self-centering anti-jamming hydraulic valve core.

[0030] Working principle: pre-connect the ends of the No. 1 pressure oil connecting pipe 24 and the No. 2 pressure oil connecting pipe 251 to the external hydraulic valve pressure oil system, and deliver pressure oil from the No. 1 pressure oil connecting pipe 24 to the hydraulic valve body 1, which can push the valve core body 22 to move downward, causing the valve core body 22 to fit on the top of the bottom sealing plate 26 to complete the blocking function, and deliver pressure oil from the No. 2 pressure oil connecting pipe 251 to the hollow cylinder 25, which can push the sealing slide 253 to move, causing the alloy centering sleeve 254 to fit on the outer wall of the valve core body 22, and perform centering support treatment on the valve core body 22.

[0031] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A self-centering anti-jamming hydraulic valve core, comprising a hydraulic valve body (1), characterized in that: The right side of the hydraulic valve body (1) is fixedly connected to an output flange pipe (11); the hydraulic valve body (1) is provided with a self-centering protection mechanism (2); the self-centering protection mechanism (2) comprises an inner baffle (21) and a hollow cylinder (25); the inner baffle (21) is fixedly mounted on the inner wall of the hydraulic valve body (1); a valve core body (22) is slidably connected to the inner wall of the inner baffle (21); the hollow cylinder (25) is fixedly mounted on the side of the inner wall of the hydraulic valve body (1) and is located below the inner baffle (21); a reset elastic member (252) is fixedly mounted on the inner wall of the hollow cylinder (25); the reset elastic member (252) A sealing slide (253) is fixedly connected to one end away from the inner wall of the hollow cylinder (25), and the outer wall of the sealing slide (253) is slidably connected to the inner wall of the hollow cylinder (25). The sealing slide (253) extends to the side of the hollow cylinder (25) away from the reset elastic member (252) and is fixedly connected to an alloy centering sleeve (254). The inner wall of the alloy centering sleeve (254) is slidably connected to the outer wall of the valve core body (22). A No. 2 pressure oil connecting pipe (251) is fixedly connected to the side of the hollow cylinder (25), and the No. 2 pressure oil connecting pipe (251) extends from one end of the hollow cylinder (25) to the side of the hydraulic valve body (1).

2. A self-centering anti-jamming hydraulic valve core according to claim 1, characterized in that: A raised sleeve (211) is fixedly connected to the top of the inner partition (21), a rubber sleeve (212) is fixedly connected to the inner wall of the raised sleeve (211), the inner wall of the rubber sleeve (212) is slidably connected to the outer wall of the valve core body (22), a return spring (23) is fixedly connected to the top of the valve core body (22), and the top of the return spring (23) is fixedly connected to the top of the inner wall of the hydraulic valve body (1).

3. A self-centering anti-jamming hydraulic valve core according to claim 1, characterized in that: The self-centering protection mechanism (2) also includes a No. 1 pressure oil connecting pipe (24), a bottom sealing plate (26) and a fixed sleeve (263); the No. 1 pressure oil connecting pipe (24) is fixedly connected to the top of the hydraulic valve body (1); a rubber frame (262) is fixedly connected to the outer wall of the bottom sealing plate (26); and the outer wall of the rubber frame (262) is movably connected to the inner wall of the hydraulic valve body (1).

4. A self-centering anti-jamming hydraulic valve core according to claim 3, characterized in that: The top of the bottom sealing plate (26) is fixedly connected to a rubber ring 1 (261), and the top of the rubber ring 1 (261) is movably connected to the bottom of the valve core body (22). The inner wall of the bottom sealing plate (26) is fixedly connected to a rubber ring 2 (2611), and the inner wall of the rubber ring 2 (2611) is movably connected to the outer wall of the valve core body (22).

5. A self-centering anti-jamming hydraulic valve core according to claim 3, characterized in that: The fixing sleeve (263) is fixedly mounted on the outer wall of the hydraulic valve body (1); a bolt member (264) is threadedly connected to the outer wall of the fixing sleeve (263); a plug-in arm (265) is welded to the bottom of the bottom sealing plate (26); the upper part of the plug-in arm (265) is movably plugged into the inner cavity of the fixing sleeve (263); and the threaded end of the bolt member (264) is movably connected to the outer wall of the upper part of the plug-in arm (265).

6. A self-centering anti-jamming hydraulic valve core according to claim 5, characterized in that: The bottom of the bottom sealing plate (26) is fixedly connected to an input flange pipe (266), a circular partition (267) is fixedly installed on the inner wall of the input flange pipe (266), and the top of the circular partition (267) is fixedly connected to a material passing barrel (268).

7. A self-centering anti-jamming hydraulic valve core according to claim 6, characterized in that: A square hole (269) is provided on the outer wall of the material passing barrel (268), and a cross grid member (2691) is fixedly mounted on the inner wall of the square hole (269).

8. Hydraulic valve, characterized in that: A self-centering, anti-jamming hydraulic valve core comprising the self-centering, anti-jamming hydraulic valve core as claimed in any one of claims 1 to 7.

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