CN218509829U

CN218509829U - Valve core assembly with anti-loosening function

Info

Publication number: CN218509829U
Application number: CN202221066925.2U
Authority: CN
Inventors: 王培�
Original assignee: Beijing Long March Tian Min Hi Tech Co ltd
Current assignee: Beijing Long March Tian Min Hi Tech Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2023-02-21
Anticipated expiration: 2032-05-06

Abstract

The invention provides a valve core assembly with an anti-loosening function, which belongs to the technical field of hydraulic valves and comprises a valve core, a valve rod, a clamping assembly, a valve core gland and a limiting part, wherein the valve rod is provided with a first limiting part and connecting parts arranged on two sides of the first limiting part along the axial direction; the valve rod is used for the valve core to penetrate; the clamping assembly is connected with the valve rod and is used for being connected with the valve core; the valve core gland is provided with a plurality of limiting holes matched with the first limiting part and used for contacting with the valve core; the limiting piece is used for penetrating through the limiting hole and pressing the connecting portion. The valve core assembly with the anti-loosening function provided by the invention is provided with the anti-loosening structure by utilizing the principle that the threads rotate to generate displacement, and can realize an efficient anti-loosening effect. The valve core assembly with the anti-loosening function also has anti-loosening operation convenience, two fixed parts are not required to be assembled and machined in an assembling link, and anti-loosening can be realized in a part machining link through direct forming.

Description

Valve core assembly with anti-loosening function

Technical Field

The invention belongs to the technical field of hydraulic valves, and particularly relates to a valve core assembly with an anti-loosening function.

Background

The throttle valve applied to the aerospace turnover hydraulic system is a high-flow throttle valve, the flow regulation range is 1000-4000L/min, the throttle valve plays a key role in the system, and the valve core assembly assembling quality plays a key role in the performance of the throttle valve.

The valve core gland, the valve rod, the valve core and the like are screwed and fixed together through threads. Because the hydraulic system has high requirement on redundancy control, the conventional measures such as coating anti-loose glue cannot be implemented. The mode of fixing the threaded hole is matched, because the operation of an assembling link is involved, the remainders such as scraps are easily mixed in the part, the part is not easy to clean, and when the product is disassembled for the second time, the thread is damaged, the thread is very easily bitten, and the part is scrapped.

Therefore, it is urgently needed to design and develop a valve core assembly with a locking function.

Disclosure of Invention

The invention aims to provide a valve core assembly with a locking function, and aims to solve the technical problem.

In order to realize the purpose, the invention adopts the technical scheme that: provided is a valve core assembly with a looseness prevention function, comprising:

a valve core;

the valve rod is provided with a first limiting part and connecting parts arranged on two sides of the first limiting part along the axial direction; the valve rod is used for the valve core to penetrate;

the clamping assembly is connected with the valve rod and is used for being connected with the valve core;

the valve core gland is provided with a plurality of limiting holes matched with the first limiting part and used for contacting with the valve core;

and the limiting piece is used for penetrating through the limiting hole and pressing the connecting part.

Preferably, the connecting part is of a threaded structure; the limiting hole is a threaded hole; the limiting piece is of a screw structure.

Preferably, the restricting member includes a damaged portion that is damaged by an external force for preventing the restricting member from loosening.

Preferably, the valve core pressing cover further comprises a movable piece movably connected with the valve core pressing cover, the movable piece has a first use state and a second use state, and in the first use state, the movable piece is in contact with the first limiting part, is connected with the valve core pressing cover, is fixed by the limiting piece and is in a fixed position relation with the connecting part; and the movable piece is not contacted with the first limiting part in the second use state.

Preferably, the movable piece is connected with the valve core gland in a sliding mode along the radial direction; the restricting member includes an acting portion for changing the movable member from the first use condition to the second use condition.

Preferably, the movable member is of a plate structure.

Preferably, the limiting holes are provided with a plurality of groups at intervals along the circumferential direction of the valve core gland; the limiting holes correspond to the limiting pieces one to one.

Preferably, a plurality of first limit parts are arranged along the axial direction of the valve rod.

The valve core assembly with the anti-loosening function provided by the invention has the beneficial effects that: compared with the prior art, the valve core assembly with the anti-loosening function has the advantages that the anti-loosening structure is arranged by utilizing the principle that the threads rotate to generate displacement, and the efficient anti-loosening effect can be realized. The valve core assembly with the anti-loosening function also has anti-loosening operation convenience, two fixed parts are not required to be assembled and machined in an assembling link, and anti-loosening can be realized in a part machining link through direct forming. The method is wide in application range and suitable for the anti-loosening requirement between two parts matched with various threads. The manufacturing cost is low, the method does not relate to secondary processing of an assembly link, and the labor cost is saved; the anti-loosening structure is convenient to disassemble again, and the characteristic that parts are scrapped due to thread seizure cannot occur.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic perspective view of a valve core assembly with an anti-loose function according to an embodiment of the present invention;

fig. 2 is a first schematic sectional view illustrating a valve core assembly with an anti-loose function according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a valve core assembly with an anti-loose function according to an embodiment of the present invention;

fig. 4 is a schematic structural composition diagram of a valve core assembly part structure with an anti-loose function according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a valve rod adopted by the valve core assembly with the anti-loosening function according to the embodiment of the present invention;

fig. 6 is a schematic cross-sectional structural view of another valve core gland adopted in a valve core assembly with an anti-loose function according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a limiting member used in a valve core assembly with an anti-loose function according to an embodiment of the present invention.

In the figure: 1. a valve core; 2. a valve stem; 21. a first limiting part; 22. a connecting portion; 3. a clamping assembly; 4. A valve core gland bush; 41. a limiting hole; 5. a limiting member; 51. a damaged portion; 52. a structural body; 53. an action part.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, 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 merely illustrative of the invention and do not limit the invention.

Referring to fig. 1 to fig. 5, a valve core assembly with a locking function according to the present invention will now be described. The valve core assembly with the anti-loosening function comprises a valve core 1, a valve rod 2, a clamping assembly 3, a valve core gland 4 and a limiting piece 5, wherein a first limiting part 21 and connecting parts 22 which are axially arranged on two sides of the first limiting part 21 are arranged on the valve rod 2; the valve rod 2 is used for the valve core 1 to penetrate; the clamping component 3 is connected with the valve rod 2 and is used for being connected with the valve core 1; the valve core gland 4 is provided with a plurality of limiting holes 41 matched with the first limiting part 21 and used for contacting with the valve core 1; the restricting member 5 is adapted to pass through the restricting hole 41 and press the connecting portion 22. Specifically, the connecting portion 22 has a threaded structure; the limiting hole 41 is a threaded hole; the limiting member 5 is of a screw structure. The surface of the first position-limiting portion 21 is a cambered surface. The surface of the first stopper portion 21 is lower than the upper surface of the connecting portion 22 (i.e., the surface where the portion of the thread structure that is farthest away in the radial direction from the valve stem 2 is located).

The valve core assembly with the anti-loosening function provided by the invention is provided with the anti-loosening structure by utilizing the principle that the threads rotate to generate displacement, and can realize an efficient anti-loosening effect. The valve core assembly with the anti-loosening function also has anti-loosening operation convenience, two fixed parts are not required to be assembled and machined in an assembling link, and anti-loosening can be realized in a part machining link through direct forming. The method has wide application range, and is suitable for the anti-loosening requirement between two parts in various thread matching. The manufacturing cost is low, the method does not relate to secondary processing of an assembly link, and the labor cost is saved; the anti-loosening structure is convenient to disassemble again, and the characteristic that parts are scrapped due to thread seizure cannot occur.

In some embodiments, the restricting member 5 includes a damaged portion 51, and the damaged portion 51 is damaged by an external force to prevent the restricting member 5 from loosening. In particular, the limiting member 5 further comprises a structural body 52. The damaged portion 51 has a partial structure of a screw structure connected to the structural body 52. After the limiting part 5 is screwed, part of the thread structure between the valve core gland 4 and the structure main body 52 is punched and riveted, and part of the thread structure of the limiting part 5 is damaged, so that the purpose of preventing looseness is achieved.

Referring to fig. 1 to 5, as a specific implementation manner of the embodiment of the present invention, a plurality of sets of limiting holes 41 are arranged along the circumferential direction of the valve plug cover 4 at intervals. The limiting holes 41 correspond to the limiting pieces 5 one by one. Through setting up a plurality of hookup location along circumference, improved case gland 4 and valve rod 2 connected relation's fastness, improved locking effect.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 5, a plurality of first position-limiting portions 21 are disposed along the axial direction of the valve rod 2. Specifically, at least one set of first limiting parts 21 is provided. The first position-limiting portion 21 may also be provided with at least two sets. When first spacing portion 21 was equipped with at least two sets of, increased the area of being connected of case gland 4 and valve rod 2, improved the fastness of case gland 4 and valve rod 2 relation of connection, improved locking effect.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 7, the valve core assembly with the anti-loose function further includes a movable member 6 movably connected to the valve core gland 4, the movable member 6 has a first use state and a second use state, and in the first use state, the movable member 6 contacts with the first limiting portion 21, is connected to the valve core gland 4, and is fixed by the limiting member 5; in the second use state, the movable element 6 is not in contact with the first stopper portion 21.

In the present embodiment, the movable member 6 is slidably connected to the valve plug cover 4 along the radial direction of the valve plug cover 4; the restriction member 5 includes an action portion 53 for changing the movable element 6 from the first use condition to the second use condition. The limiting piece 5 automatically drives the moving piece 6 to move in the process of being screwed into the limiting hole 41, and the valve core assembly with the anti-loosening function can be assembled in a time-saving and efficient mode.

The inner surface of the valve core gland 4 is provided with a plurality of grooves. Part of the structure of each groove is at least coincided with one limiting hole 41. The movable pieces 6 correspond to the grooves one by one. The movable piece 6 is of a plate structure. The moving piece 6 is positioned in the groove and movably connected with the groove. The moving part 6 contacts with the first limiting part 21, is connected with the valve core gland 4 and can play a role in preventing looseness when being fixed by the limiting part 5.

The working portion 53 is an expanded portion that expands in the radial direction and is connected to the top end of the structural body 52. The dimension of the expanded portion in the radial direction is larger than the maximum value of the dimension of the damaged portion 51 in the radial direction.

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

When the moving member 6 needs to be moved, an iron wire can be used to extend into the limiting hole 41, and then the moving member 6 is moved to a part of the structure located in the limiting hole 41. More specifically, the movable member 6 is provided with protrusions at both ends thereof, respectively. And the protruding portions extend into the limiting holes 41, respectively.

The invention also provides a looseness prevention method for the valve core assembly, which comprises the following steps:

s1, arranging a first limiting part 21 and connecting parts 22 which are arranged on two sides of the first limiting part 21 along the axial direction on a valve rod 2; the connecting portion 22 has a threaded structure.

S2, arranging a plurality of limiting holes 41 matched with the first limiting part 21 on the valve core gland 4; the limiting hole 41 is a threaded hole structure. The number of the limiting holes 41 is 4-8. The stopper holes 41 are provided at intervals in the circumferential direction of the spool cover 4.

S3, installing the clamping component 3 on one side of the valve rod 2, and penetrating the valve core 1 from the other side of the valve rod 2. The clamping assembly 3 comprises a clamping key, a clamping key stop block and a clamping key wedge block. The clamping assembly 3 is arranged in a groove at one end of the valve rod 2.

S4, the valve core 1 is pressed and fixed by the valve core gland 4 through the connecting part 22;

s5, installing a limiting piece 5, and penetrating through the limiting hole 41 through the limiting piece 5 and pressing the connecting part 22; the limiting member 5 is of a screw structure. The edges of the thread structures are compressed by the chamfer structures at the front ends of the screw structures.

S6, damaging partial structure of the limiting piece 5, and further achieving the purpose of preventing looseness. Part of the structure of the limiting piece 5 is destroyed by punching and riveting. Specifically, after the screw structure is screwed down, 3 points are punched and riveted on the thread between the valve core gland 4 and the screw structure, and the thread of the screw structure is damaged.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A case subassembly with locking function, its characterized in that includes:

a valve core (1);

the valve rod (2) is provided with a first limiting part (21) and connecting parts (22) which are arranged on two sides of the first limiting part (21) along the axial direction; the valve rod (2) is used for the valve core (1) to penetrate;

the clamping assembly (3) is connected with the valve rod (2) and is used for being connected with the valve core (1);

the valve core gland (4) is provided with a plurality of limiting holes (41) matched with the first limiting part (21) and is used for contacting with the valve core (1);

and the limiting piece (5) is used for penetrating through the limiting hole (41) and pressing the connecting part (22).

2. The valve core assembly with the anti-loosening function according to claim 1, wherein: the connecting part (22) is of a threaded structure; the limiting hole (41) is a threaded hole; the limiting piece (5) is of a screw structure.

3. A valve core assembly with anti-loosening function as claimed in claim 2, wherein: the limiting piece (5) comprises a damaged part (51), and the damaged part (51) is damaged under the action of external force and used for preventing the limiting piece (5) from loosening.

4. A spool assembly with anti-loosening function according to any one of claims 1 to 3, wherein: the valve core pressing cover is characterized by further comprising a movable piece (6) movably connected with the valve core pressing cover (4), wherein the movable piece (6) has a first use state and a second use state, and in the first use state, the movable piece (6) is in contact with the first limiting portion (21), is connected with the valve core pressing cover (4), is fixed by the limiting piece (5), and is in a fixed position relation with the connecting portion (22); in the second use state, the movable piece (6) is not in contact with the first limiting part (21).

5. The valve core assembly with the anti-loosening function according to claim 4, wherein: the movable piece (6) is connected with the valve core gland (4) in a sliding mode along the radial direction; the limiting piece (5) comprises an action part (53) for enabling the movable piece (6) to change from the first use state to the second use state.

6. The valve core assembly with the anti-loosening function according to claim 5, wherein: the movable piece (6) is of a plate body structure.

7. The valve core assembly with the anti-loosening function according to claim 1, wherein: the limiting holes (41) are provided with a plurality of groups at intervals along the circumferential direction of the valve core gland (4); the limiting holes (41) correspond to the limiting pieces (5) one by one.

8. The valve core assembly with the anti-loosening function according to claim 1, wherein: the first limiting parts (21) are arranged in a plurality of numbers along the axial direction of the valve rod (2).