A valve core assembly with anti-loosening function and its installation method

Abstract

The present invention provides a valve core assembly with an anti-loosening function, which belongs to the technical field of hydraulic valves and includes a valve core, a valve stem, a clamping assembly, a valve core cover and a restriction. The valve stem is provided with a first limiting portion and connecting portions axially arranged on both sides of the first limiting portion; the valve stem is used for the valve core to penetrate; the clamping assembly is connected to the valve stem for connection with the valve core; the valve core cover is provided with a number of limiting holes adapted to the first limiting portion for contacting the valve core; the restriction member is used to pass through the limiting hole and tighten the connecting portion. The present invention provides a valve core assembly with an anti-loosening function and an installation method thereof, which utilizes the principle of displacement caused by thread rotation to set an anti-loosening structure, and can achieve an efficient anti-loosening effect. This valve core assembly with an anti-loosening function also has the advantage of convenient anti-loosening operation. The two fixed parts do not require assembly processing, and anti-loosening can be achieved by directly forming in the parts processing link.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic valves, and more particularly, relates to a valve core assembly with an anti-loosening function and an installation method thereof. Background Art

[0002] The throttle valve used in the aerospace rollover hydraulic system is a large-flow throttle valve with a flow adjustment range of 1000 to 4000 L / min. The throttle valve plays a key role in the system, and the assembly quality of the valve core plays a key role in the performance of the throttle valve.

[0003] The valve core gland, valve stem, and valve core are secured together through a threaded connection. Because hydraulic systems require strict control of excess material, conventional methods like applying anti-loosening adhesive are impractical. Threaded hole fixing involves assembly operations, allowing debris and other excess material to easily enter the components, making them difficult to clean. Furthermore, during secondary disassembly, the threads can become damaged, leading to thread seizure and resulting in component failure.

[0004] Therefore, there is an urgent need to design and develop a valve core assembly with an anti-loosening function and an installation method thereof. Summary of the Invention

[0005] The object of the present invention is to provide a valve core assembly with an anti-loosening function and an installation method thereof, in order to solve the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a valve core assembly with an anti-loosening function, comprising:

[0007] valve core;

[0008] A valve stem is provided with a first limiting portion and connecting portions axially arranged on both sides of the first limiting portion; the valve stem is used for the valve core to penetrate;

[0009] A clamping assembly connected to the valve stem and used to connect to the valve core;

[0010] A valve core gland is provided with a plurality of limiting holes adapted to the first limiting portion and configured to contact the valve core;

[0011] The limiting member is used to pass through the limiting hole and press the connecting portion.

[0012] Preferably, the connecting portion is a threaded structure; the limiting hole is a threaded hole; and the limiting member is a screw structure.

[0013] Preferably, the limiting member includes a damaged portion, which is damaged under the action of an external force to prevent the limiting member from loosening.

[0014] Preferably, it also includes a movable part movably connected to the valve core cover, and the movable part has a first usage state and a second usage state. In the first usage state, the movable part contacts the first limiting portion and is connected to the valve core cover, and is fixed by the limiting part, and is in a fixed position relationship with the connecting portion; in the second usage state, the movable part does not contact the first limiting portion.

[0015] Preferably, the movable member is connected to the valve core gland in a radially sliding manner; and the limiting member includes an action portion for changing the movable member from a first use state to a second use state.

[0016] Preferably, the limiting holes are provided in a plurality of groups at intervals along the circumference of the valve core gland; and the limiting holes correspond to the limiting members one by one.

[0017] Preferably, a plurality of first limiting portions are provided along the axial direction of the valve stem.

[0018] The present invention also provides a method for preventing a valve core assembly from loosening, comprising the following steps:

[0019] Step 1: Provide a first limiting portion and connecting portions axially disposed on both sides of the first limiting portion on the valve stem;

[0020] Step 2: setting a plurality of limiting holes on the valve core gland that are adapted to the first limiting portion;

[0021] Step 3: Install the clamping assembly on one side of the valve stem and insert the valve core from the other side of the valve stem;

[0022] Step 4: The valve core gland is pressed and fixed to the valve core through the connecting portion;

[0023] Step 5: Install the limiting member, pass the limiting member through the limiting hole and press the connecting portion;

[0024] Step 6: destroy part of the structure of the limiting member to prevent loosening.

[0025] Preferably, the connecting portion is a threaded structure; the limiting hole is a threaded hole structure; the limiting member is a screw structure; and the outer surface of the first limiting portion is a curved surface.

[0026] Preferably, in step 6, a partial structure of the restricting member is destroyed by riveting.

[0027] The beneficial effects of the valve core assembly with an anti-loosening function and the installation method thereof provided by the present invention are as follows: compared with the prior art, the valve core assembly with an anti-loosening function and the installation method thereof provided by the present invention utilize the principle of displacement caused by thread rotation to set an anti-loosening structure, which can achieve efficient anti-loosening effect. This valve core assembly with an anti-loosening function also has the advantages of convenient anti-loosening operation, and the two fixed parts do not need to be processed in the assembly link, and anti-loosening can be achieved by directly forming in the part processing link. It has a wide range of applications, and this method is applicable to the anti-loosening requirements between two parts with various threaded fits. The manufacturing cost is low, and this method does not involve secondary processing in the assembly link, saving labor costs; the anti-loosening structure is easy to disassemble again, and there will be no problem of parts being scrapped due to thread biting. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 paying any creative work.

[0029] Figure 1 A schematic diagram of the three-dimensional structure of a valve core assembly with an anti-loosening function provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a cross-sectional structure of a valve core assembly with an anti-loosening function provided by an embodiment of the present invention Figure 1 ;

[0031] Figure 3 A schematic diagram of a cross-sectional structure of a valve core assembly with an anti-loosening function provided by an embodiment of the present invention Figure 2 ;

[0032] Figure 4 A schematic diagram of the structure of a valve core assembly with an anti-loosening function provided by an embodiment of the present invention;

[0033] Figure 5 A schematic structural diagram of a valve stem used in a valve core assembly with an anti-loosening function provided in an embodiment of the present invention;

[0034] Figure 6 A schematic cross-sectional view of another valve core gland used in a valve core assembly with an anti-loosening function provided in an embodiment of the present invention;

[0035] Figure 7 A structural schematic diagram of a restriction member used in a valve core assembly with an anti-loosening function provided in an embodiment of the present invention;.

[0036] In the figure: 1. valve core; 2. valve stem; 21. first limiting portion; 22. connecting portion; 3. clamping assembly; 4. valve core gland; 41. limiting hole; 5. limiting member; 51. destroyed portion; 52. structural main body; 53. action portion. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] Please also refer to Figures 1 to 5 , a valve core assembly with an anti-loosening function provided by the present invention is now described. The valve core assembly with an anti-loosening function includes a valve core 1, a valve stem 2, a clamping assembly 3, a valve core cover 4 and a limiting member 5. The valve stem 2 is provided with a first limiting portion 21 and connecting portions 22 axially arranged on both sides of the first limiting portion 21; the valve stem 2 is used for the valve core 1 to penetrate; the clamping assembly 3 is connected to the valve stem 2 and is used to connect with the valve core 1; the valve core cover 4 is provided with a plurality of limiting holes 41 adapted to the first limiting portion 21 for contacting the valve core 1; the limiting member 5 is used to pass through the limiting holes 41 and press the connecting portion 22. Specifically, the connecting portion 22 is a threaded structure; the limiting hole 41 is a threaded hole; and the limiting member 5 is a screw structure. The surface of the first limiting portion 21 is a radian surface (curved surface). The surface of the first limiting portion 21 is lower than the upper surface of the connecting portion 22 (that is, the surface where the threaded structure is farthest away from the valve stem 2 in the radial direction).

[0039] The present invention provides a valve core assembly with an anti-loosening function, which uses the principle of displacement caused by thread rotation to set an anti-loosening structure, and can achieve an efficient anti-loosening effect. This valve core assembly with an anti-loosening function also has the characteristics of convenient anti-loosening operation. The two fixed parts do not need to be processed in the assembly process, and anti-loosening can be achieved by directly forming them in the part processing process. It has a wide range of applications. This method is suitable for the anti-loosening requirements between two parts with various threaded fittings. The manufacturing cost is low. This method does not involve secondary processing in the assembly process, saving labor costs. The anti-loosening structure is easy to disassemble again, and there will be no problem of parts being scrapped due to thread biting.

[0040] In some embodiments, the restricting member 5 includes a destructible portion 51, which is damaged by external forces and serves to prevent the restricting member 5 from loosening. Specifically, the restricting member 5 also includes a structural body 52. ​​The destructible portion 51 is a portion of the threaded structure connected to the structural body 52. ​​After tightening the restricting member 5, the threaded structure between the valve core gland 4 and the structural body 52 is punched and riveted to destroy the threaded structure of the restricting member 5, thereby preventing loosening.

[0041] As a specific implementation of the embodiment of the present invention, please refer to Figures 1 to 5 The limiting holes 41 are arranged in a plurality of groups at intervals along the circumference of the valve core gland 4. The limiting holes 41 correspond one to one with the limiting members 5. By providing multiple connection positions along the circumference, the connection between the valve core gland 4 and the valve stem 2 is strengthened and the anti-loosening effect is improved.

[0042] As a specific implementation of the embodiment of the present invention, please refer to Figures 1 to 5 A plurality of first limiting portions 21 are provided along the axial direction of the valve stem 2. Specifically, at least one set of first limiting portions 21 is provided. Alternatively, at least two sets of first limiting portions 21 are provided. Providing at least two sets of first limiting portions 21 increases the connection area between the valve core gland 4 and the valve stem 2, improves the secure connection between the valve core gland 4 and the valve stem 2, and enhances the anti-loosening effect.

[0043] As a specific implementation of the embodiment of the present invention, please refer to Figures 1 to 7 This valve core assembly with anti-loosening function also includes a movable part 6 that is movably connected to the valve core cover 4. The movable part 6 has a first use state and a second use state. In the first use state, the movable part 6 contacts the first limit part 21, is connected to the valve core cover 4, and is fixed by the limiting part 5; in the second use state, the movable part 6 does not contact the first limit part 21.

[0044] In this embodiment, the movable member 6 is slidably connected to the valve core gland 4 along its radial direction. The restricting member 5 includes an actuating portion 53 for shifting the movable member 6 from a first operating position to a second operating position. As the restricting member 5 is screwed into the restricting hole 41, it automatically moves the movable member 6, enabling time-saving and efficient assembly of the anti-loosening valve core assembly.

[0045] The inner surface of the valve core gland 4 is provided with several grooves. Part of each groove overlaps with at least one stopper hole 41. The movable member 6 corresponds to each groove. The movable member 6 is a plate-like structure. The movable member 6 is positioned within the groove and movably connected to the groove. When the movable member 6 contacts the first stopper 21 and is connected to the valve core gland 4 and secured by the stopper 5, it prevents the movable member 6 from loosening.

[0046] The action portion 53 is an expansion portion that is connected to the top of the structural body 52 and expands in the radial direction. The radial size of the expansion portion is greater than the maximum radial size of the destroyed portion 51.

[0047] The limiting hole 41 includes a movable portion and a threaded portion from top to bottom. When the movable member 6 is in the second use state, part of the structure of the movable member 6 is located in the threaded portion.

[0048] When the movable member 6 needs to be moved, a wire can be inserted into the limiting hole 41, and then the portion of the movable member 6 located in the limiting hole 41 can be moved. More specifically, protrusions are provided at both ends of the movable member 6, and the protrusions extend into the limiting holes 41 respectively.

[0049] The present invention also provides a method for preventing a valve core assembly from loosening, comprising the following steps:

[0050] S1. A first limiting portion 21 and connecting portions 22 axially arranged on both sides of the first limiting portion 21 are provided on the valve stem 2; the connecting portions 22 are threaded structures.

[0051] S2. Set a plurality of limiting holes 41 on the valve core gland 4 that match the first limiting portion 21. The limiting holes 41 are threaded holes. The number of limiting holes 41 is 4-8. The limiting holes 41 are spaced apart along the circumference of the valve core gland 4.

[0052] S3. Install the clamping assembly 3 on one side of the valve stem 2 and insert the valve core 1 from the other side of the valve stem 2. The clamping assembly 3 includes a clamping key, a clamping key stopper, and a clamping key wedge. The clamping assembly 3 is installed in the groove at one end of the valve stem 2.

[0053] S4, the valve core gland 4 presses and fixes the valve core 1 through the connecting portion 22;

[0054] S5. Install the limiting member 5, pass the limiting member 5 through the limiting hole 41 and press the connecting portion 22; the limiting member 5 is a screw structure, and the chamfered structure at the front end of the screw structure presses the edge of the thread structure.

[0055] S6. Part of the structure of the restricting member 5 is destroyed to prevent loosening. Part of the structure of the restricting member 5 is destroyed by riveting. Specifically, after tightening the screw structure, three points of riveting are performed on the threads between the valve core gland 4 and the screw structure to destroy the threads of the screw structure.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve core assembly with an anti-loosening function, characterized in that: include: Valve core (1); A valve stem (2) is provided with a first limiting portion (21) and connecting portions (22) axially arranged on both sides of the first limiting portion (21); the valve stem (2) is used for the valve core (1) to penetrate; A clamping assembly (3) connected to the valve stem (2) and used to connect to the valve core (1); A valve core gland (4) is provided with a plurality of limiting holes (41) adapted to the first limiting portion (21) and configured to contact the valve core (1); A limiting member (5) is used to pass through the limiting hole (41) and press the connecting portion (22); It also includes a movable member (6) movably connected to the valve core gland (4), and the movable member (6) has a first use state and a second use state. In the first use state, the movable member (6) contacts the first limit portion (21) and is connected to the valve core gland (4), and is fixed by the limit member (5), and is in a fixed position relationship with the connecting portion (22); in the second use state, the movable member (6) does not contact the first limit portion (21); A plurality of first limiting portions (21) are provided along the axial direction of the valve stem (2).

2. A valve core assembly with an anti-loosening function according to claim 1, characterized in that: The connecting portion (22) is a threaded structure; the limiting hole (41) is a threaded hole; and the limiting member (5) is a screw structure.

3. The valve core assembly with anti-loosening function according to claim 2, characterized in that: The limiting member (5) comprises a damaged portion (51), wherein the damaged portion (51) is damaged under the action of an external force and is used to prevent the limiting member (5) from loosening.

4. The valve core assembly with anti-loosening function according to claim 3, characterized in that: The movable member (6) is connected to the valve core gland (4) in a radially sliding manner; the limiting member (5) includes an action portion (53) for changing the movable member (6) from a first use state to a second use state.

5. The valve core assembly with anti-loosening function according to claim 1, characterized in that: The limiting holes (41) are provided in a plurality of groups at intervals along the circumference of the valve core gland (4); the limiting holes (41) correspond one to one with the limiting members (5).

6. A method for installing a valve core assembly with an anti-loosening function, characterized in that: The following steps are involved: Step 1: providing a first limiting portion (21) and connecting portions (22) axially arranged on both sides of the first limiting portion (21) on the valve stem (2); Step 2: providing a plurality of limiting holes (41) on the valve core gland (4) adapted to the first limiting portion (21); Step 3: Install the clamping assembly (3) on one side of the valve stem (2), and insert the valve core (1) from the other side of the valve stem (2); Step 4: The valve core gland (4) is pressed and fixed to the valve core (1) via the connecting portion (22); Step 5: Install the limiting member (5), pass the limiting member (5) through the limiting hole (41) and press the connecting portion (22); Step 6: destroying part of the structure of the limiting member (5) to achieve the purpose of preventing loosening.

7. The method for installing a valve core assembly with an anti-loosening function according to claim 6, characterized in that: The connecting portion (22) is a threaded structure; the limiting hole (41) is a threaded hole structure; the limiting member (5) is a screw structure; and the outer surface of the first limiting portion (21) is a cambered surface.

8. The method for installing a valve core assembly with an anti-loosening function according to claim 7, characterized in that: In step 6, a partial structure of the limiting member (5) is destroyed by punch riveting.

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