CN211819860U

CN211819860U - Air valve gland with good sealing performance

Info

Publication number: CN211819860U
Application number: CN201922490506.6U
Authority: CN
Inventors: 丁国钰; 李德华; 崔苗壮; 朱亚海; 曹坡坡; 程磊; 杜小祥; 周华富
Original assignee: Chongqing Gas Compressor Factory Co Ltd
Current assignee: Chongqing Gas Compressor Factory Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-30
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a gas compressor field, concretely relates to pneumatic valve gland that sealing performance is good. The utility model provides a pneumatic valve gland that sealing performance is good, includes cylinder gland and cylinder main part to and set up the pneumatic valve in the cylinder inside, the upper end of pneumatic valve is provided with the pneumatic valve gland that compresses tightly the pneumatic valve, in close contact with between pneumatic valve gland's bottom and the pneumatic valve, cylinder gland's lower surface is provided with convex annular groove, annular groove's lower surface and pneumatic valve gland's upper surface in close contact with just support the pneumatic valve gland tightly on the pneumatic valve, annular groove's surface is equipped with second annular groove, be equipped with first sealing washer in the second annular groove, the bottom outside of annular groove is equipped with first annular slope, be equipped with the second sealing washer between annular slope and the pneumatic valve gland. The technical scheme not only solves the problem that compressed gas leaks from the thread gap of the top thread of the compressor, but also greatly improves the sealing effect of the gas valve gland.

Description

Air valve gland with good sealing performance

Technical Field

The utility model relates to a gas compressor field, concretely relates to pneumatic valve gland that sealing performance is good.

Background

The compressor sucks low-temperature and low-pressure gas from the air suction pipe, drives the piston to compress the gas through the operation of the motor, and discharges high-temperature and high-pressure gas to the exhaust pipe, and the compressor is the heart of a refrigeration system.

The requirements for a sealing system in a compressor are relatively high, since the compressor generates high-pressure gas when it is operated. In the prior art, a sealing mode generally adopts a top thread at the top end of a cylinder gland to compress a gas valve gland, because the top thread is small, the moment of high-pressure gas generated in a cylinder to the gas valve gland is relatively large, the damage of a top thread is easily caused, and once the top thread is damaged, the gas in the cylinder leaks from a gap of the thread. In the prior art, in order to prevent gas from leaking from a contact gap between a cylinder gland and a cylinder, an O-shaped sealing ring is arranged between the cylinder gland and a cylinder main body, and because the pressure of the gas in the cylinder is large, the traditional O-shaped sealing ring can only play a certain sealing effect in a short time, so that the gas leakage condition can occur after a period of time, and the working efficiency of the compressor is reduced.

Disclosure of Invention

To not enough in the above-mentioned technique, the utility model aims to provide an air valve gland that sealing performance is good for solve compressed gas and leak from compressor jackscrew thread gap, and the short problem of O shape sealing washer seal time between cylinder gland and the cylinder body.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a pneumatic valve gland that sealing performance is good, includes cylinder gland and cylinder main part, pass through bolted connection between cylinder gland and the cylinder main part, still including setting up the pneumatic valve inside the cylinder, the upper end of pneumatic valve is provided with the pneumatic valve gland that compresses tightly the pneumatic valve, in close contact with between pneumatic valve gland's bottom and the pneumatic valve, cylinder gland's lower surface is provided with convex first annular groove, the lower surface of first annular groove and pneumatic valve gland's upper surface in close contact with just support pneumatic valve gland tightly on the pneumatic valve, annular groove's surface is equipped with second annular groove, be equipped with first sealing washer in the second annular groove, the bottom outside of annular groove is equipped with annular slope, be equipped with the second sealing washer between annular slope and the pneumatic valve gland.

The better theory of operation of this technical scheme sealed effect does: at first this technical scheme gets rid of the jackscrew mechanism who plays the tight effect of support to the pneumatic valve gland on traditional cylinder gland, makes the first annular tank bottom of cylinder gland bottom direct and pneumatic valve gland contact, makes area of contact bigger, has not only reduced the local stress of gland, still to the tight effect of support of pneumatic valve gland better, has still solved the condition that traditional cylinder gland goes up the jackscrew screw thread and receives destruction and the gas leakage that appears simultaneously. Be provided with the second sealing washer between the first annular slope on first annular groove, still the second sealing washer is cross sectional shape upper end and is right trapezoid, the lower extreme is the rectangle, when fixed cylinder gland, the second sealing washer is by extrusion deformation, and cylinder inner wall, contact inseparabler between cylinder gland and the valve gland more, it is better to make sealed effect, not only so still be equipped with first sealing washer above first annular groove, first sealing washer has avoided a small amount of gas to leak from the gap between cylinder gland and the cylinder main part, first sealing washer and second sealing washer play double seal's effect to the cylinder, the possibility that the gas leakage caused that the valve gland sealed effect is not good has been reduced.

Further, first sealing washer has certain elastic O shape sealing washer for the material, and its beneficial part lies in: set up O shape sealing washer in the outstanding first annular groove of cylinder gland and play the sealed effect to the contact gap between cylinder gland and the cylinder, prevent that gas from leaking between the contact gap, play the duplicate protection effect.

Further, first sealing washer is the fluororubber sealing washer, its beneficial part is in: the fluororubber sealing ring is good in elasticity, not easy to damage when the beggar gland is fixed, and has the characteristic of high temperature resistance and is matched with the sealing environment in the cylinder.

Further, the cross sectional shape upper end of second sealing washer is right trapezoid, and the lower extreme is the rectangle, and its beneficial effect lies in: under the extrusion of the first annular groove of the cylinder gland, the sealing effect of the gap between the cylinder gland and the air valve gland is better.

Further, the upper end outer lane of pneumatic valve gland is equipped with second annular slope face, and its beneficial effect lies in: the cavity between the first annular slope surface and the second annular slope surface at the bottom of the first annular groove of the cylinder gland is provided with a third sealing ring, and the third sealing ring is extruded and deformed in the cavity, so that the sealing ring and the contact surface are contacted more closely, and the sealing effect is better.

Further, the third annular groove of slope is seted up to cylinder main part inboard, its beneficial effect lies in: when the bottom of the third annular sealing ring is installed, a part of the bottom of the third annular sealing ring is embedded into the third annular groove, and the sealing effect on the contact gap between the inner wall of the cylinder main body and the air valve gland is better.

Further, the inclination angle of the slope surface of the third annular groove and the outer end of the air valve gland is the same, and the air valve gland has the advantages that: the bottom of the second annular sealing ring is easier to be embedded into the third annular groove.

Furthermore, the cross section of the third annular groove is triangular, and the sealing ring has the advantages that the contact surface of the second annular sealing ring is matched with the contact surface of the third annular groove, so that the contact is tight, and the sealing effect is better.

Furthermore, a third sealing ring is arranged in the third annular groove, the cross section of the third sealing ring is triangular, and a part of the third sealing ring is embedded into the third annular groove. It has the advantage of better air tightness to the inner side of the cylinder body.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention.

Fig. 2 is a schematic illustration of an unmodified conventional cross-sectional view of an embodiment of the present invention.

Fig. 3 is a schematic partial cross-sectional view of a sealing portion of an embodiment of the invention.

Fig. 4 is a partial sectional view schematically showing a sealing portion in example 2 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the cylinder comprises a cylinder body 1, a cylinder gland 2, a jackscrew 3, an air valve gland 4, an air valve 5, a second annular groove 6, a first sealing ring 7, a first annular slope surface 8, a second sealing ring 9, a first annular groove 10, a third sealing ring 11, a second annular slope surface 12 and a third annular groove 13.

It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The specific implementation process is as follows:

as shown in fig. 1 and 3, in the present technical solution, a cylinder body 1 and a cylinder gland 2 are connected by bolts, an air valve 5 and an air valve gland 4 are arranged inside the cylinder, a first annular groove 10 protruding from a bottom end of the cylinder gland 2 directly acts on the air valve gland 4, and the air valve 5 is tightly fixed inside the cylinder body 1 by transmitting torque through the air valve gland 4.

A second annular groove 6 is formed in the inner wall of the cylinder body 1, a first sealing ring 7 is arranged in the second annular groove 6, and the first sealing ring 7 is a fluororubber O-shaped sealing ring with certain elasticity. The outside in first annular groove 10 bottom begins to have first annular slope face 8, surface contact on first annular groove 10 and pneumatic valve gland 4, vacuole formation between the slope face of first annular groove 10 and pneumatic valve gland 4, be equipped with second sealing washer 9 in the cavity, the cross sectional shape of second sealing washer 9 is right trapezoid for the upper end, the lower extreme is the rectangle, right trapezoid's hypotenuse is towards the center of cylinder main part 1, first slope face contacts with the hypotenuse of second sealing washer 9, at the fixed in-process of cylinder gland 2, with 9 extrusion deformation of second sealing washer, make the inseparabler contact of second sealing washer 9 and contact surface, make its sealed effect better.

As shown in fig. 2, in the conventional cylinder structure, a top thread 3 on a cylinder gland 2 is used to act on a valve gland 4, so that the valve gland 4 fixes a valve 5 in a cylinder body 1.

Example 2

As shown in fig. 4, the difference between the embodiment 2 and the embodiment 1 is that a second annular slope surface 12 is provided on the outer end of the valve gland 4, a third annular groove 13 is provided at a position as high as the valve gland 4 on the inner wall of the cylinder, the third annular groove 13 has a triangular cross section, and the third annular groove 13 and the second annular slope surface 12 have the same inclination angle, so that the third sealing ring 11 can be inserted. And a third sealing ring 11 is arranged in a cavity between the first annular slope surface 8 and the second annular slope surface 12, the cross section of the sealing ring is triangular, a part of the third sealing ring 11 is embedded into a third annular groove 13 during installation, and in the process of continuous extrusion of the cylinder gland 2, the third sealing ring 11 deforms and is tightly contacted with the cylinder body 1, the air valve gland 4 and the first annular groove 10, so that the sealing performance of the sealing ring is ensured.

A part of the third sealing ring 11 is embedded in the cylinder body 1, and the effect of sealing the inner wall of the cylinder is better under the extrusion of the cylinder gland 2, so that gas cannot easily leak out from the inner wall of the cylinder.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a gas valve gland that sealing performance is good, includes cylinder gland and cylinder main part, pass through bolted connection between cylinder gland and the cylinder main part, its characterized in that: the air valve sealing device is characterized by further comprising an air valve arranged inside the air cylinder, an air valve gland for compressing the air valve is arranged at the upper end of the air valve, the bottom end of the air valve gland is in close contact with the air valve, a convex first annular groove is formed in the lower surface of the air cylinder gland, the lower surface of the first annular groove is in close contact with the upper surface of the air valve gland, the air valve gland is abutted to the air valve tightly, a second annular groove is formed in the outer surface of the first annular groove, a first sealing ring is arranged in the second annular groove, a first annular slope is arranged on the outer side of the bottom of the first annular groove, and a second sealing ring is arranged between the annular slope and the air valve.

2. The gas valve gland with good sealing performance according to claim 1, wherein: the first sealing ring is an O-shaped sealing ring which is made of materials and has certain elasticity.

3. The gas valve gland with good sealing performance according to claim 2, wherein: the first sealing ring is a fluorine rubber sealing ring.

4. The gas valve gland with good sealing performance according to claim 1, wherein: the upper end of the cross section of the second sealing ring is in a right trapezoid shape, and the lower end of the cross section of the second sealing ring is in a rectangular shape.

5. The gas valve gland with good sealing performance according to claim 1, wherein: and a second annular slope surface is arranged on the outer ring of the upper end of the air valve gland.

6. The gas valve gland with good sealing performance according to claim 1, wherein: an inclined third annular groove is formed in the inner side of the cylinder body.

7. The gas valve gland with good sealing performance according to claim 6, wherein: the inclination angle of the slope surface of the third annular groove and the outer end of the air valve gland is the same.

8. The gas valve gland with good sealing performance according to claim 6, wherein: the cross-sectional shape of the third annular groove is triangular.

9. The gas valve gland with good sealing performance according to claim 6, wherein: and a third sealing ring is arranged in the third annular groove, the cross section of the third sealing ring is triangular, and part of the third sealing ring is embedded into the third annular groove.