CN217130345U

CN217130345U - Manual inflation valve structure

Info

Publication number: CN217130345U
Application number: CN202123320450.3U
Authority: CN
Inventors: 魏中良; 王文巧; 赖念华
Original assignee: Wuhan Aviation Instrument Co Ltd
Current assignee: Wuhan Aviation Instrument Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-08-05
Anticipated expiration: 2031-12-27

Abstract

The utility model belongs to the technical field of pressure instrument and meter, a manual inflation valve structure. Including the clamping ring, the cassette, the case, right side shifting block, left side shifting block, adjusting nut, the disk seat, the locating pin, the cassette is arranged in the centre bore of case, it is fixed to compress tightly through the interference fit between clamping ring and the case, the case passes the centre bore of disk seat, the left boss of case is outer along the cooperation with the interior conical surface of disk seat, form the valve port, the fixed pin crimping is on the disk seat, inboard tip acts on in the recess on case surface, make the case only can follow the endwise slip, left side shifting block is two the same parts with right shifting block, install in proper order in opposite directions in the dextrorotation external screw thread root of case, adjusting nut passes through left-handed screw and links to each other with the disk seat, the other end is located between the arch of right shifting block and left shifting block. The valve core is moved rightwards or leftwards by stirring the right shifting block or the left shifting block through rotating the adjusting nut, so that the valve port is closed or opened, and the valve is particularly suitable for matched products with the functions of inflating or exhausting the system.

Description

Manual inflation valve structure

Technical Field

The utility model belongs to the technical field of pressure instrument and meter or other technical field, a manual inflation valve structure is related to.

Background

In various pressure devices such as gas cylinders, pressure accumulators and the like, the system is required to be inflated or exhausted, and an inflation valve is an important valve for controlling gas inflation and deflation. The common electromagnetic valve is used as a control element to perform automatic inflation and deflation of the system, while the manual inflation valve has the characteristics of no need of a power supply, portability, simple operation and the like and is widely applied to various pressure devices. The manual inflation valve adopts a three-way valve structure integrating an air inlet nozzle, an air outlet nozzle and a rotating handle, and has large volume and complex structure; the inflation valve adopting the structural form of the spring-reset inner cone valve has small inflation flow, higher requirement on the part processing precision and difficult operation during exhaust; the external thread of the valve core is adopted as the inflation valve of the transmission thread, and the pneumatic inflation valve is usually easy to deform due to small thread specification and low tooth form strength, and has the defects of abrasion and even seizure. Therefore, it is a new need to design a manual inflation valve with small size, large flow, simple operation and reliable use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the manual inflation valve structure is small in structural size, large in flow, simple to process, convenient to install and reliable to use.

The technical scheme of the utility model is that:

a manual inflation valve structure comprises a pressure ring 1, a filter disc 2, a valve core 3, a right shifting block 4, a left shifting block 5, an adjusting nut 6, a valve seat 7 and a positioning pin 8; the filter disc 2 is arranged in a central hole of the valve core 3 and is pressed and fixed through interference fit between the pressure ring 1 and the valve core 3; the valve core 3 penetrates through the valve seat inner cavity of the valve seat 7, and the outer edge of a boss at one end of the valve core 3 close to the inner pressure cavity is matched with the inner conical surface of the valve seat 7 to form a valve port 9; the positioning pin 8 is pressed on the valve seat 7, and the inner end surface of the positioning pin acts on the groove on the surface of the valve core 3, so that the valve core 3 can only slide along the axial direction; the left shifting block 5 and the right shifting block 4 are two same parts, comprise convex structures and are sequentially and oppositely arranged at the root of the thread of the valve core 3 to form self-locking; the adjusting nut 6 is connected with the valve seat 7 through a thread opposite to the external thread of the valve core 3, and the other end of the adjusting nut contains a necking structure and acts between the bulges of the right shifting block 4 and the left shifting block 5.

The structure of the inflation valve is a pure mechanical structure.

The filter sheet 2 is used for filtering media and can also prevent foreign matters from entering a central hole of the valve core 3 to cause blockage.

The groove is a kidney-shaped groove in the axial direction on the surface of the valve core 3, and two flat side surfaces of the groove are limited by the inner end surface of the positioning pin 8, so that the valve core 3 cannot rotate; the arc side surfaces at the two ends of the groove are limited by the inner end surfaces of the positioning pins 8, so that the valve core 3 can only slide in a specified distance along the axial direction.

The valve port 9 is matched by a line surface or two small conical surfaces, the surface roughness is less than Ra0.8, and good sealing performance can be ensured.

When the valve port 9 is opened, a working medium enters and exits through a central hole of the valve core 3, and the central hole is used as a gas channel, so that the valve core 3 can have a channel with a largest sectional area while ensuring larger bending strength.

By rotating the adjusting nut 6, the right shifting block 4 or the left shifting block 5 is shifted, so that the valve core 3 moves rightwards or leftwards, and the valve port 9 is closed or opened.

The thread on the valve core 3 is right-handed, the thread on the adjusting nut 6 is left-handed, or the thread on the valve core 3 is left-handed, and the thread on the adjusting nut 6 is right-handed. Two pairs of threads with opposite screwing directions can ensure that the right shifting block 4 cannot be loosened under the acting force of the adjusting nut 6 when the adjusting nut 6 is rotated.

The matching screw threads on the adjusting nut 6 and the valve seat 7 are transmission screw threads, the specification of the adjusting nut is larger than that of the screw threads on the valve core 3, the strength of the screw threads can be improved, and the service life is prolonged.

The convex structure on the right shifting block 4 or the left shifting block 5 comprises a square chamfered edge which is used as a spanner clamping position when the assembly is screwed down or unscrewed.

The utility model has the advantages and beneficial effects that: the device is of a pure mechanical structure, does not have wearing parts such as rubber sealing rings and the like, and is simple and reliable through press fit or threaded connection. The valve port 9 can be opened or closed by rotating the adjusting nut 6, and the operation is simple. The right shifting block 4 and the left shifting block 5 can realize the anti-loosening of threads after being screwed down. The right shifting block 4 and the left shifting block 5 are opposite to the thread turning direction of the adjusting nut 6, when the adjusting nut 6 acts on the right shifting block 4, the acting force enables the right shifting block 4 to rotate towards the screwing direction without loosening, when the adjusting nut 6 acts on the left shifting block 5, the acting force enables the left shifting block 5 to rotate towards the screwing direction or does not loosen due to the limitation of the right shifting block 4, and the structure is simple and effective. The device can be used as an independent functional component and can be quickly integrated into various pressure devices such as gas cylinders, pressure accumulators and the like.

Drawings

FIG. 1 is a schematic structural view of a manual inflation valve of the present invention;

FIG. 2 is a schematic view of the installation structure of the nitrogen cylinder assembly of the present invention;

wherein: pressing a ring; 2: a filter disc; 3: a valve core; 4: a right shifting block; 5: a left shifting block; 6: adjusting the nut; 7: a valve seat; 8: positioning pins; 9: a valve port; 10: sealing the copper gasket; 11: and a nitrogen gas cylinder assembly.

Detailed Description

The present invention will be further described with reference to the following examples. The following description is only a part of the embodiments of the present invention, and not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.

The manual inflation valve structure comprises a pressing ring 1, a filter sheet 2, a valve core 3, a right shifting block 4, a left shifting block 5, an adjusting nut 6, a valve seat 7 and a positioning pin 8; the filter disc 2 is arranged in a central hole of the valve core 3 and is pressed and fixed through interference fit between the pressure ring 1 and the valve core 3; the valve core 3 penetrates through the valve seat inner cavity of the valve seat 7, and the outer edge of a boss at one end of the valve core 3 close to the inner pressure cavity is matched with the inner conical surface of the valve seat 7 to form a valve port 9; the positioning pin 8 is pressed on the valve seat 7, and the inner end surface of the positioning pin acts on the groove on the surface of the valve core 3, so that the valve core 3 can only slide along the axial direction; the left shifting block 5 and the right shifting block 4 are two same parts, comprise convex structures and are sequentially and oppositely arranged at the root of the thread of the valve core 3 to form self-locking; the adjusting nut 6 is connected with the valve seat 7 through a thread opposite to the external thread of the valve core 3, and the other end of the adjusting nut contains a necking structure and acts between the bulges of the right shifting block 4 and the left shifting block 5.

The valve core 3, the positioning pin 8, the left shifting block 5, the adjusting nut 6 and the right shifting block 4 are assembled in sequence, and reliable installation can be realized by means of a universal wrench; the parts can be disassembled by reverse operation, so that the device is convenient to maintain and simple and effective to operate.

When the adjusting nut 6 is rotated upwards, due to the action of the left-hand thread, the adjusting nut moves rightwards along the valve seat 7 and acts on the left end face of the protrusion on the right shifting block 4, so that the valve core 3 is pushed to move rightwards, the valve port 9 is closed, and air leakage is avoided. At this time, the right block 4 is rotated in the tightening direction without loosening by the force acting on the left end surface of the projection on the right block 4.

When the adjusting nut 6 is rotated downwards, the adjusting nut moves leftwards along the valve seat 7 under the action of the left-hand thread and acts on the right end face of the bulge on the left shifting block 5, so that the valve core 3 is pushed to move leftwards, the valve port 9 is opened, and the nitrogen cylinder assembly 11 can be inflated or exhausted. At this time, the acting force acting on the right end face of the protrusion on the left shifting block 5 enables the left shifting block 5 to rotate in the unscrewing direction, but the left shifting block 5 and the right shifting block 4 form thread self-locking, so that the left shifting block 5 cannot be loosened under the limitation of the right shifting block 4.

The sealing copper gasket 10 is used for connecting and sealing the inflation valve structure and the nitrogen cylinder assembly 11.

The structure of the inflation valve is a pure mechanical structure.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A manual inflation valve structure is characterized by comprising a pressing ring (1), a filter disc (2), a valve core (3), a right shifting block (4), a left shifting block (5), an adjusting nut (6), a valve seat (7) and a positioning pin (8); the filter disc (2) is arranged in a central hole of the valve core (3), and is pressed and fixed through interference fit between the pressing ring (1) and the valve core (3), the valve core (3) penetrates through the central hole of the valve seat (7), the outer edge of a boss on the left side of the valve core (3) is matched with the inner conical surface of the valve seat (7) to form a valve port (9), the positioning pin (8) is pressed on the valve seat (7), the end part of the positioning pin acts on a groove on the surface of the valve core (3), so that the valve core (3) can only slide along the axial direction, the left shifting block (5) and the right shifting block (4) are two same parts and are sequentially and oppositely arranged at the root part of a right-handed external thread of the valve core (3), the adjusting nut (6) is connected with the valve seat (7) through the left-handed thread, and the other end of the adjusting nut is positioned between the bulges of the right shifting block (4) and the left shifting block (5).

2. A manual air-filling valve structure according to claim 1, characterized in that the filter sheet (2) is used for filtering media to prevent foreign matters from entering the central hole of the valve core (3).

3. The manual inflation valve structure of claim 1, wherein the groove is a kidney-shaped groove along the axial direction on the surface of the valve core (3), and two flat side surfaces of the groove are limited by the inner end surface of the positioning pin (8), so that the valve core (3) cannot rotate; the arc side surfaces at the two ends of the groove are limited by the inner end surfaces of the positioning pins (8), so that the valve core (3) can only slide in a specified distance along the axial direction.

4. A manual air-filling valve structure according to claim 1, wherein the valve port (9) is a line surface fit or two small conical surfaces fit each other, and the surface roughness should be less than ra0.8.

5. A manual charging valve structure according to claim 1, characterized in that when the valve port (9) is opened, the working medium enters and exits through the central hole of the valve core (3), and the central hole is used as a gas passage, which has a passage with a maximum cross-sectional area while ensuring a greater bending strength of the valve core (3).

6. The manual inflation valve structure of claim 1, wherein the thread on the valve core (3) is right-handed, the thread on the adjusting nut (6) is left-handed, or the thread on the valve core (3) is left-handed, and the thread on the adjusting nut (6) is right-handed; two pairs of threads with opposite screwing directions can ensure that the right shifting block (4) can not be loosened under the acting force of the adjusting nut (6) when the adjusting nut (6) is rotated.

7. The structure of a manual inflation valve according to claim 1, characterized in that the matching screw threads on the adjusting nut (6) and the valve seat (7) are transmission screw threads, and the specification of the transmission screw threads is larger than that of the screw threads on the valve core (3), so that the strength of the screw threads can be improved, and the service life can be prolonged.

8. A manual air-filling valve structure according to claim 1, characterized in that the raised structure on the right shifting block (4) or the left shifting block (5) comprises a square chamfered edge as a wrench clamp for tightening or loosening the assembly.