CN217029456U

CN217029456U - Lightweight high-reliability self-locking valve

Info

Publication number: CN217029456U
Application number: CN202220990450.XU
Authority: CN
Inventors: 田捍卫; 胡兆华; 李志鹏; 胡飞强; 苑高辉; 张万年; 沈博; 顾龙昌; 葛赛; 胡大坤
Original assignee: Henan Aerospace Hydraulic and Pneumatic Technology Co Ltd
Current assignee: Henan Aerospace Hydraulic and Pneumatic Technology Co Ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-07-22
Anticipated expiration: 2032-04-27

Abstract

The utility model discloses a light-weight high-reliability self-locking valve, which is used for solving the problems of large volume, narrow range of use pressure and low reliability of the existing self-locking valve. The utility model comprises a valve seat and a valve body, wherein a coil assembly is arranged on the valve body, and a valve core assembly is arranged between the valve seat and the valve body; the valve core assembly comprises a valve core base body and a sealing block, wherein one side of the valve core is provided with an axial stepped hole, the other side of the valve core base body is provided with an axial mounting hole, and the axial stepped hole is axially communicated with the mounting hole; a first spring and a sealing block are sequentially arranged in the axial stepped hole along the medium flowing direction, the sealing block is fixed in the axial stepped hole through a pressing ring, a radial liquid outlet hole is formed in the valve core base body, and the radial liquid outlet hole is communicated with the axial stepped hole; and a second spring is arranged in the mounting hole. The outer end faces of the valve seat and the coil assembly, the shell and the valve body are welded by laser, so that the sealing property is improved; springs are arranged at two ends of the valve core assembly, so that the valve core assembly can be buffered when moving to close, and the reliability of the valve is improved.

Description

Lightweight high-reliability self-locking valve

Technical Field

The utility model relates to the technical field of hydraulic pneumatic elements, in particular to a light-weight high-reliability self-locking valve.

Background

The self-locking valve is a control part in a fluid conveying system, has the functions of stopping, adjusting, guiding, preventing reverse flow, stabilizing pressure, shunting and the like, is widely applied in the field of aerospace, and has special use environment, so that higher requirements are provided for the self-locking valve. For example, a latching valve installed in an aircraft fluid circuit system is an important component of the system, and functions as: the on-off of the fluid circuit is controlled, and the on-off state can be kept after the power failure. Due to the special use environment, the weight and the space of the product are limited to a certain extent, and the requirement on reliability is high. The ordinary self-locking valve can not meet the requirements of customers on quality, volume and reliability, so that the design of the self-locking valve with light weight and strong reliability is necessary.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the background art, the utility model provides a light-weight high-reliability self-locking valve which is used for solving the problems of large volume, narrow range of use pressure, low reliability and the like of the existing self-locking valve.

The technical scheme of the utility model is realized as follows: a light-weight high-reliability self-locking valve comprises a valve seat and a valve body, wherein a coil assembly is arranged on the valve body, and a valve core assembly is arranged between the valve seat and the valve body; the valve core assembly comprises a valve core base body and a sealing block, wherein an axial stepped hole is formed in one side, facing the valve seat, of the valve core base body, an axial mounting hole is formed in the other side of the valve core base body, and the axial stepped hole is axially communicated with the mounting hole; a first spring and a sealing block are sequentially arranged in the axial stepped hole along the medium flowing direction, the sealing block is fixed in the axial stepped hole through a pressing ring, a radial liquid outlet hole is formed in the valve core substrate, and the radial liquid outlet hole is communicated with the axial stepped hole; and a second spring is arranged in the mounting hole, and the second spring and the first spring are coaxially arranged.

The sealing block is a non-metal T-shaped block, a spring gasket is arranged between the large end of the non-metal T-shaped block and the first spring, and faces the first spring, and the small end of the non-metal T-shaped block corresponds to the R-shaped sealing structure arranged in the valve seat.

The R-shaped sealing structure comprises a boss integrally formed with the valve seat, the end face of the boss facing the sealing block is an arc surface, the boss is a cone, and a liquid outlet hole is formed in the boss of the valve seat. The liquid outlet hole is coaxial with the axial stepped hole and the mounting hole; the non-metal T-shaped block is a fluorinated ethylene propylene rod body. And a magnetic isolation gasket is arranged between the valve body and the valve core assembly.

And a positioning hole matched with the second spring is arranged on the end face of the valve body facing the valve core assembly.

The coil component comprises a coil framework, a coil and a magnet are arranged on the coil framework, a valve seat sleeve is arranged in the outer end of the coil framework and sealed by laser welding, the inner end part of the coil framework is sleeved on the valve body, magnetic steel is arranged between the coil and the valve body, and the magnetic steel is sleeved on the valve body. The inner wall of the coil framework is provided with a nickel layer, and the outer wall of the valve core base body is provided with a chromium layer.

The coil assembly is sealed on the valve body through the shell, a connector is arranged at the liquid inlet of the valve body, and a filter screen is arranged between the connector and the liquid inlet of the valve body. The end part of the valve body facing the connector is sleeved with a magnetic separation sheet and a magnetic conduction sheet from inside to outside in sequence, and the magnetic conduction sheet is respectively welded with the shell and the valve body.

The outer end faces of the valve seat and the coil assembly, the shell and the valve body are welded by laser, so that the problems of easy abrasion of sealing of a conventional O-shaped ring, low space utilization rate, high cost and the like are solved; the springs are arranged at the two ends of the valve core assembly, and play a role in buffering when the valve core assembly is closed in movement, so that the deformation of the plastic sealing block under the condition of long service life is reduced, the consistency of sealing performance can be better ensured, and the overall reliability of the valve is improved. The filter screen is added at the inlet, so that the filtering precision of the system is improved, the cleanliness of the system and the reliability of the self-locking valve are improved, and the use requirement of the aircraft under special working conditions can be met. The utility model has compact integral structure, improves the reliability of the self-locking valve while ensuring the volume reduction, enlarges the application range and has higher practicability.

Drawings

In order to illustrate the embodiments of the utility model more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings may be derived from them by a person skilled in the art without inventive effort.

FIG. 1 is a schematic view of the overall internal structure of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 and 2, in embodiment 1, a light-weight high-reliability self-locking valve includes a valve seat 1 and a valve body 10, a coil assembly 2 is disposed on the valve body 10, and a valve core assembly 3 is disposed between the valve seat 1 and the valve body 10; the flow channel between the valve seat 1 and the valve body 10 and between the valve core components 3 are arranged coaxially, that is, an axial flow structure is adopted, and the on-off of a fluid loop is controlled through a coil component. The valve core assembly 3 comprises a valve core base body 301 and a sealing block 302, wherein the valve core base body 301 is positioned in a sealing cavity formed by the coil assembly, the valve body and the valve seat; the sealing block is matched with a flow channel arranged on the valve seat to realize the control of the on-off of the fluid. One side of the valve core base body 301, which faces the valve seat 1, is provided with an axial stepped hole, the other side of the valve core base body 301 is provided with an axial mounting hole, the axial stepped hole is axially communicated with the mounting hole to form a flow channel in the valve core, and the axial stepped hole and the mounting hole are coaxially arranged. The first spring 303 and the sealing block 304 are sequentially arranged in the axial stepped hole along the medium flowing direction, and the sealing block 304 is fixed in the axial stepped hole through a pressing ring 305. The valve core base body 301 is provided with a radial liquid outlet hole 307, fluid entering the valve core through the communication between the radial liquid outlet hole 307 and the axial stepped hole flows out to the valve seat through the radial liquid outlet hole, and then liquid outlet control is realized through the contact between the sealing block and the runner port or not. A second spring 306 is arranged in the mounting hole, and the second spring 306 and the first spring 303 are coaxially arranged. First spring and the cooperation of second spring play the cushioning effect when closing the motion of case subassembly to reduce the deformation of sealed piece, the uniformity of assurance leakproofness that can be better, and improve the reliability.

As shown in fig. 2, in embodiment 2, a light-weight high-reliability self-locking valve, based on embodiment 1, the sealing block 304 in this embodiment is a non-metal T-shaped block, and the non-metal T-shaped block is preferably a polyperfluorinated ethylene propylene rod. The big end of the non-metal T-shaped block faces the first spring 303, and a spring gasket 308 is arranged between the non-metal T-shaped block and the first spring 303, and the spring gasket 308 can effectively prevent the sealing block from deforming, so that the service life of the sealing block is prolonged. The small end of the non-metal T-shaped block corresponds to the R-shaped sealing structure arranged in the valve seat 1, and the sealing reliability is improved.

The R-type sealing structure specifically comprises: r type seal structure includes boss 11 with disk seat 1 integrated into one piece, and boss 11 is the cone, and boss 11 is the arc surface towards the terminal surface of sealed block 304, and the contact point contact of arc surface and non-metal T type piece gradually becomes the face contact, improves sealed effect and valve overall reliability. The boss 11 of the valve seat 1 is provided with a liquid outlet 12. The liquid outlet 12 is communicated with a flow channel on the valve seat and is coaxially arranged with the axial stepped hole and the mounting hole to form an axial flow structure.

In this embodiment, the magnetic isolation gasket 4 is disposed between the valve body 10 and the valve core assembly 3, and the magnetic isolation sheets with different thicknesses can be used to test the locking force and the suction force, so as to determine the final assembly state size according to the actual measurement value. The end face of the valve body 10 facing the valve core assembly 3 is provided with a positioning hole matched with the second spring 306, so that the second spring is stably fixed between the valve core base body and the valve body.

As shown in fig. 1, in embodiment 3, the coil assembly 2 includes a coil bobbin 201 in addition to embodiment 2, and the coil bobbin 201 is a cylindrical structure welded by a flux sleeve 201a and a flux barrier 201 b. The coil 202 and the magnet are arranged on the coil framework 201, the valve seat 1 is sleeved in the outer end of the coil framework 201, the coil framework 201 and the magnet are sealed by laser welding, and the welding site is represented by 521, so that the problems that the conventional O-shaped ring is easy to wear, low in space utilization rate, high in cost and the like are solved. The inner end part of the coil framework 201 is sleeved on the valve body 10, a magnetic steel 5 is arranged between the coil 202 and the valve body 10, and the magnetic steel 5 is sleeved on the valve body 10. In this embodiment, the inner wall of the coil bobbin 201 is provided with a nickel layer, and the outer wall of the valve core base 301 is provided with a chromium layer. Namely, the inner hole of the coil framework is plated with nickel, and the excircle of the valve core matrix is plated with chromium, so that the surface hardness is improved, the friction between the inner hole and the excircle is reduced, and the friction loss generated by the movement of parts is reduced, thereby achieving the purpose of improving the reliability.

Further, coil pack 2 passes through casing 13 and seals on valve body 10, and the inlet department of valve body 10 is equipped with connector 8, is equipped with filter screen 9 between connector 8 and the inlet of valve body 10, makes its system filter fineness improve, helps improving the reliability of system cleanliness and auto-lock valve, can satisfy the operation requirement of aircraft under special operating mode. The end part of the valve body 10 facing the connector is sequentially sleeved with the magnetism isolating sheet 6 and the magnetism conducting sheet 7 from inside to outside, the magnetism conducting sheet 7 is respectively welded with the shell 13 and the valve body 10, and the welding can adopt laser welding.

As a preferred scheme, the diameter of the self-locking valve is 1mm, the working pressure is 0-18Mpa, the total length of the valve is not more than 75mm, and the diameter is not more than 29 mm. The self-locking valve is designed according to the electromagnetic induction principle, when the open coil is electrified, the electromagnetic attraction force generated enables the right iron stop of the self-locking valve to attract the valve core assembly, the sealing surface at the valve core is opened, and after the power is cut off, the locking force generated by the magnetic steel enables the armature to be stably positioned at the open position; when the coil is switched on, the attraction force and the spring force between the left side stop iron and the valve core assembly exist, the magnetic steel locking force is overcome to drive the valve core assembly to move leftwards, the spring force and the magnetic steel locking force fix the valve core assembly in the closed position after the coil is switched off, and the valve core assembly is sealed with the sealing surface of the valve seat. The integral structure is compact, and the reliability of the self-locking valve is improved while the volume is reduced.

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 utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a light-weighted high reliability latching valve, includes disk seat (1) and valve body (10), is equipped with coil pack (2) on valve body (10), its characterized in that: a valve core assembly (3) is arranged between the valve seat (1) and the valve body (10); the valve core assembly (3) comprises a valve core base body (301), one side, facing the valve seat (1), of the valve core base body (301) is provided with an axial stepped hole, the other side of the valve core base body (301) is provided with an axial mounting hole, and the axial stepped hole is communicated with the mounting hole in the axial direction; a first spring (303) and a sealing block (304) are sequentially arranged in the axial stepped hole along the medium flowing direction, the sealing block (304) is fixed in the axial stepped hole through a pressing ring (305), a radial liquid outlet hole (307) is formed in the valve core base body (301), and the radial liquid outlet hole (307) is communicated with the axial stepped hole; and a second spring (306) is arranged in the mounting hole, and the second spring (306) and the first spring (303) are coaxially arranged.

2. The light-weight high-reliability latching valve according to claim 1, characterized in that: the sealing block (304) is a non-metal T-shaped block, a large end of the non-metal T-shaped block faces towards the first spring (303), a spring gasket (308) is arranged between the non-metal T-shaped block and the first spring (303), and a small end of the non-metal T-shaped block corresponds to the R-shaped sealing structure arranged in the valve seat (1).

3. The light-weight high-reliability latching valve according to claim 2, characterized in that: r type seal structure includes boss (11) with disk seat (1) integrated into one piece, and boss (11) are the arc surface towards the terminal surface of sealed piece (304), and boss (11) are the cone, and boss (11) department of disk seat (1) is equipped with out liquid hole (12).

4. The light weight high reliability latching valve of claim 3, characterized in that: the liquid outlet hole (12) is coaxial with the axial stepped hole and the mounting hole; the non-metal T-shaped block is a fluorinated ethylene propylene rod body.

5. The light-weight high-reliability self-locking valve according to any one of claims 1 to 4, characterized in that: and a magnetic isolation gasket (4) is arranged between the valve body (10) and the valve core assembly (3).

6. The light weight high reliability latching valve of claim 5, wherein: and a positioning hole matched with the second spring (306) is arranged on the end surface of the valve body (10) facing the valve core assembly (3).

7. The light-weight high-reliability latching valve according to any one of claims 1 to 4 and 6, characterized in that: coil pack (2) include coil skeleton (201), and coil (202) and magnet setting are on coil skeleton (201), and disk seat (1) cover is established in the outer end of coil skeleton (201) and adopts laser welding sealed between the two, and the interior tip cover of coil skeleton (201) is established on valve body (10), is equipped with magnet steel (5) between coil (202) and valve body (10), and magnet steel (5) cover is established on valve body (10).

8. The light weight, high reliability latching valve of claim 7, wherein: the inner wall of the coil framework (201) is provided with a nickel layer, and the outer wall of the valve core base body (301) is provided with a chromium layer.

9. The light weight high reliability latching valve of claim 8, wherein: coil pack (2) are sealed on valve body (10) through casing (13), and the inlet port department of valve body (10) is equipped with connector (8), is equipped with filter screen (9) between the inlet of connector (8) and valve body (10).

10. The light-weight high-reliability latching valve according to claim 8 or 9, characterized in that: the end part of the valve body (10) facing the connector is sequentially sleeved with a magnetic separation sheet (6) and a magnetic conduction sheet (7) from inside to outside, and the magnetic conduction sheet (7) is respectively welded with the shell (13) and the valve body (10).