CN215981999U

CN215981999U - Safety gas cylinder with slow release valve

Info

Publication number: CN215981999U
Application number: CN202122170517.3U
Authority: CN
Inventors: 胡顺安; 陈言畅
Original assignee: Changshu Institute of Technology
Current assignee: Changshu Institute of Technology
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-03-08
Anticipated expiration: 2031-09-09

Abstract

The utility model discloses a safe gas cylinder with a slow release valve, which comprises a gas cylinder body, a threaded connecting sleeve and a slow release valve, wherein a top seat and a base are arranged in a bottleneck of the gas cylinder body, a piston cavity is formed between the top seat and the base, a piston is arranged in the piston cavity, a gas guide groove is formed in the cavity wall of the piston cavity, the upper cavity and the lower cavity of the piston are communicated through the gas guide groove when the piston moves downwards, a through gas guide through hole is formed in the base, a rotating seat which is rotatably connected with the base and used for opening and closing the gas guide through hole is arranged below the base, an operating window which exposes the peripheral side of the rotating seat is arranged on the side wall of the bottleneck, an operating hole is formed in the peripheral side of the rotating seat exposed by the operating window, the threaded connecting sleeve is provided with a central support column, the threaded connecting sleeve is connected between the gas cylinder body and the slow release valve, the gas cylinder body is communicated with the slow release valve through the threaded connecting sleeve, and the lower end of the central support column is contacted with the top end of a piston pin. The utility model can prevent gas leakage caused by accidental touch of the valve and improve the safety of the gas cylinder.

Description

Safety gas cylinder with slow release valve

Technical Field

The utility model relates to a gas cylinder, in particular to a safe gas cylinder with a slow release valve.

Background

The release of high-pressure gas relates to personal safety, and particularly, the high-pressure gas which is harmful to the environment or flammable easily causes safety problems due to misoperation in the using process. Generally, the cylinder valve is of a knob type, and the valve is controlled to be opened or closed by the knob to cut off or open the gas passage. This has certain potential safety hazard, and the gas cylinder can cause the unexpected of knob formula valve to become flexible in handling and storage process to cause gas leakage.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide a safe gas cylinder with a slow release valve, and solves the problem of gas leakage caused by accidental opening of a valve of the gas cylinder.

The technical scheme of the utility model is as follows: a safe gas cylinder with a slow release valve comprises a gas cylinder body, a threaded connecting sleeve and the slow release valve, wherein the gas cylinder body is provided with a bottleneck, a top seat and a base are arranged in the bottleneck, a piston cavity is formed between the top seat and the base, a piston is arranged in the piston cavity, the piston cavity is divided into an upper cavity and a lower cavity by the piston, the peripheral side of the piston is in sealing fit with the inner wall of the bottleneck, the top seat is provided with a central shaft hole and a gas outlet through hole, a piston pin is arranged in the central shaft hole, the top end of the piston pin is lower than the top end of the central shaft hole, the piston is pushed to move downwards when the central shaft hole moves downwards, a spring is arranged between the piston and the base, a gas guide groove is arranged on the cavity wall of the piston cavity, the gas guide groove conducts the upper cavity and the lower cavity when the piston moves downwards, and the base is provided with a gas guide through hole penetrating through the base, the gas cylinder is characterized in that a rotating seat which is connected with the base in a rotating mode and used for opening and closing the gas guide through hole is arranged below the base, the periphery of the rotating seat is in sealing fit with the inner wall of the bottleneck, an operating window which exposes the periphery of part of the rotating seat is arranged on the side wall of the bottleneck, an operating hole is arranged on the periphery of the rotating seat exposed by the operating window, a central support column is arranged on the threaded connecting sleeve, the lower end of the threaded connecting sleeve is connected with an opening thread of the gas cylinder body in a threaded mode, the upper end of the threaded connecting sleeve is connected with an inlet end of the slow release valve in a threaded mode, the gas cylinder body is communicated with the slow release valve through the threaded connecting sleeve, and the lower end of the central support column is in contact with the top end of the piston pin.

Further, the piston is provided with a pin hole, the piston is sleeved on the piston pin through the pin hole, the piston pin is in sealing fit with the pin hole, the piston pin is provided with an outward-expanding shaft shoulder, and the outward-expanding shaft shoulder is in contact with the upper end face of the piston.

Furthermore, the base is provided with a blind hole, the lower end of the piston pin is arranged in the blind hole, and a gap is reserved between the lower end surface of the piston pin and the bottom of the blind hole. Through the cooperation of blind hole and central shaft hole, make the upper and lower both ends of piston pin all restricted downtheholely, prevent that the piston pin from inclining when removing the jamming.

Furthermore, the top surface of the rotating seat and the bottom surface of the base are sealed in an end face mode, and the rotating seat is provided with an opening corresponding to the air guide through hole. When the rotating seat rotates, the air guide through hole is opened when the opening hole and the air guide through hole are partially or completely overlapped.

Further, the section of the piston pin matched with the blind hole and the central shaft hole is a non-circular special-shaped section.

Further, the operating rod penetrates through the operating window and is detachably connected to the operating hole.

Further, the lower end of the threaded connecting sleeve is provided with an external thread, and the opening of the gas cylinder body is provided with an internal thread.

Compared with the prior art, the utility model has the advantages that:

after the threaded connecting sleeve is removed, the piston and the piston pin are jacked up under the action of the elastic force of the spring, the upper cavity and the lower cavity are isolated from each other by the piston, and gas cannot leak no matter where the rotating seat rotates; the top end of the piston pin is lower than the top end of the central shaft hole, when the gas cylinder is transported and stored, the piston pin is not easy to be touched and moved downwards by mistake to cause gas leakage, even if the piston pin moves downwards, the action switch of the rotating seat can still cut off a gas path, so that the gas leakage is prevented, and the safety is good; the operation driving lever can be detachably connected to the operation hole of the rotating seat, and can be detached when being transported and stored, so that the rotating seat is prevented from rotating accidentally, and the safety is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a safety gas cylinder with a slow release valve.

Fig. 2 is a schematic longitudinal sectional structure of a safety gas cylinder with a slow release valve.

FIG. 3 is a schematic view of a piston pin construction.

FIG. 4 is a schematic top view of the base and the rotary base.

Fig. 5 is a schematic cross-sectional structure view of the base.

Fig. 6 is a schematic view of a rotating base.

Fig. 7 is a schematic sectional structure view of the rotary base.

Detailed Description

The present invention is further illustrated by the following examples, which are not to be construed as limiting the utility model thereto.

Referring to fig. 1 and 2, the safety gas cylinder with a slow release valve according to the present embodiment includes a gas cylinder body 1, a threaded connection sleeve 2 and a slow release valve 3, a bottle neck 101 is disposed between an opening of the gas cylinder body 1 and the cylinder body, and a top seat 4 and a bottom seat 5 are disposed in the bottle neck 101 at an upper and lower interval. A piston cavity is enclosed by the cylinder wall of the gas cylinder body 1, the top seat 4 and the base 5. A piston 6 is disposed in the piston chamber, the piston 6 divides the piston chamber into an upper chamber 7 and a lower chamber 8, and the circumferential side of the piston 6 is in sealing engagement with the inner wall of the bottle neck 101 by a piston ring 9. An air guide groove 10 is arranged at the lower position of the cavity wall of the piston cavity (namely the cylinder wall of the gas cylinder body), and the air guide groove 10 is sunken in the cavity wall. In general, the piston ring 9 of the piston 6 makes a complete turn to contact the inner wall of the bottle neck 101, forming a seal, separating the upper chamber 7 from the lower chamber 8. When the piston 6 moves downwards and the piston ring 9 moves to the position of the air guide groove 10 along with the piston 6, the piston ring 9 cannot be kept in contact with the inner wall of the bottle neck 101 at the position of the air guide groove 10, so that the upper cavity 7 and the lower cavity 8 are communicated through the air guide groove 10. In this embodiment, an air passage 601 is formed above the piston ring 9 on the piston 6, the openings of the air passage 601 are respectively formed on the top surface and the peripheral side of the piston 6, and when the piston 6 moves down, the air guide groove 10 can also conduct the air passage 601 to enlarge the air flow circulation surface.

As shown in fig. 3, the top seat 4 is provided with a center shaft hole 401 and an air outlet hole 402, a piston pin 12 is provided in the center shaft hole 401, and the top end of the piston pin 12 is lower than the top end of the center shaft hole 401. The vent hole 402 of the top seat 4 is used to communicate the upper space of the top seat 4 with the upper chamber 7. The upper and lower parts of the piston pin 11 are both non-circular shaped cross sections, and the middle part is a circular cross section. The upper portion of piston pin 11 is equipped with outer expanding shaft shoulder 1101 with the middle part junction, and piston 7 is equipped with the pinhole, and piston 7 locates piston pin 11 through the pinhole cover, and the middle part of piston pin 11 passes through O type sealing washer and pinhole sealing fit, outer expanding shaft shoulder 1101 and the up end contact of piston 9. The base 5 is provided with a blind hole 501, the lower end of the piston pin 11 is arranged in the blind hole 501, and a gap is reserved between the lower end surface of the piston pin 11 and the bottom of the blind hole 501. Springs 12 are arranged between the piston 9 and the top seat 4 (upper cavity 7) and between the piston 9 and the base 5 (lower cavity 8), when downward pressure is applied to the top of the piston pin 11, the piston pin 11 pushes the piston 9 to move downwards through the expanding shaft shoulder 1101, and further compresses the springs 12 of the lower cavity 8, and when the downward pressure of the piston pin 11 is removed, the piston 9 moves upwards under the action of the springs 12. The piston pin 11 moves downwards by means of the installation of the threaded connecting sleeve 2. The threaded connection sleeve 2 is provided with a central support column 201, the lower end of the threaded connection sleeve 2 is provided with an external thread, the opening of the gas cylinder body 1 is provided with an internal thread, and the lower end of the threaded connection sleeve 2 is in threaded connection with the opening of the gas cylinder body 1. The upper end of the threaded connecting sleeve 2 is in threaded connection with the inlet end of the slow release valve 3, the threaded connecting sleeve 2 is provided with a plurality of through holes 202, so that the gas cylinder body 1 is communicated with the slow release valve 3 through the threaded connecting sleeve 2, and the lower end of the central support column 201 is in contact with the top end of the piston pin 11. When the threaded connecting sleeve 2 is screwed to move downwards continuously, the central support column 201 pushes the piston pin 11 to move downwards, and further pushes the piston 9 to move downwards.

As shown in fig. 4 to 7, the base 5 is provided with an air guide through hole 502 penetrating through the base, and an O-ring may be disposed around the base 5 to seal with the inner wall of the bottle neck 101. A rotating seat 14 which is rotatably connected with the base 5 and is used for opening and closing the air guide through hole 502 is arranged below the base 5 through a bearing rotating shaft 13. An upper O-shaped sealing ring and a lower O-shaped sealing ring are arranged on the periphery of the rotating seat 14 and are in sealing fit with the inner wall of the bottle neck 101, and the top surface of the rotating seat 14 and the bottom surface of the base 5 are in end face sealing. The rotary seat 14 is provided with an opening 1401 corresponding to the position of the air guide through hole 502, when the rotary seat 14 rotates, the opening 1401 and the air guide through hole 502 partially or completely coincide, the space below the base 5 is communicated with the lower cavity 8 through the opening 1401 and the air guide through hole 502, when the piston 9 moves downwards, the upper cavity 7 is further communicated, and the piston is communicated to the slow release valve 3 through the threaded connecting sleeve 2, so that an air outlet passage is formed. When the opening 1401 is not overlapped with the air guide through hole 502 completely, the air outlet passage is closed. In order to operate the rotating seat 14, an operation window 102 is provided on the sidewall of the bottle neck 101 to expose a portion of the circumference of the rotating seat, the circumference of the operation window 102 should be kept sealed with the circumference of the rotating seat 5, and in this embodiment, the operation window 102 is located between the upper and lower O-rings to ensure that gas does not leak from the operation window 102. An operation hole 1402 is formed on the rotation seat 14 on the peripheral side exposed from the operation window 102, and an operation lever 15 is detachably connected to the operation hole 1402 through the operation window 102, and the rotation seat 14 is rotated by moving the operation lever 15. A part of the protrusion may be provided on the side wall of the bottle neck 101 below the rotary seat 14 to limit the axial position of the whole mechanism, and the position of the top seat 4 is fixed above the top seat 4 by a snap spring.

The safe gas cylinder with the slow release valve is not provided with the threaded connecting sleeve 2 or the threaded connecting sleeve 2 is not screwed to the bottom, no matter how the operating deflector rod 15 is operated, gas cannot leak, the detachable operating deflector rod 15 further reduces the possibility of accidentally operating the rotating seat 14, and the safety of gas cylinder transportation and use is improved.

Claims

1. A safe gas cylinder with a slow release valve is characterized by comprising a gas cylinder body, a threaded connecting sleeve and the slow release valve, wherein the gas cylinder body is provided with a bottleneck, a top seat and a base are arranged in the bottleneck, a piston cavity is formed between the top seat and the base, a piston is arranged in the piston cavity and divides the piston cavity into an upper cavity and a lower cavity, the periphery of the piston is in sealing fit with the inner wall of the bottleneck, the top seat is provided with a central shaft hole and a gas outlet through hole, a piston pin is arranged in the central shaft hole, the top end of the piston pin is lower than the top end of the central shaft hole, the piston pin pushes the piston to move downwards when the central shaft hole moves downwards, a spring is arranged between the piston and the base, a gas guide groove is arranged on the wall of the piston cavity, the gas guide groove conducts the upper cavity and the lower cavity when the piston moves downwards, and the base is provided with a gas guide through hole penetrating through the base, the gas cylinder is characterized in that a rotating seat which is connected with the base in a rotating mode and used for opening and closing the gas guide through hole is arranged below the base, the periphery of the rotating seat is in sealing fit with the inner wall of the bottleneck, an operating window which exposes the periphery of part of the rotating seat is arranged on the side wall of the bottleneck, an operating hole is arranged on the periphery of the rotating seat exposed by the operating window, a central support column is arranged on the threaded connecting sleeve, the lower end of the threaded connecting sleeve is connected with an opening thread of the gas cylinder body in a threaded mode, the upper end of the threaded connecting sleeve is connected with an inlet end of the slow release valve in a threaded mode, the gas cylinder body is communicated with the slow release valve through the threaded connecting sleeve, and the lower end of the central support column is in contact with the top end of the piston pin.

2. The safety gas cylinder with the slow release valve according to claim 1, characterized in that the piston is provided with a pin hole, the piston is sleeved on the piston pin through the pin hole, the piston pin is in sealing fit with the pin hole, and the piston pin is provided with an outward expanding shaft shoulder which is in contact with the upper end face of the piston.

3. The safety gas cylinder with the slow-release valve as claimed in claim 2, characterized in that the base is provided with a blind hole, the lower end of the piston pin is arranged in the blind hole, and a gap is reserved between the lower end surface of the piston pin and the bottom of the blind hole.

4. The safety gas cylinder with the slow release valve according to claim 1, characterized in that the top surface of the rotating seat is end-sealed with the bottom surface of the base, and the rotating seat is provided with an opening corresponding to the position of the gas guide through hole.

5. A safety gas cylinder with a slow-release valve according to claim 3, characterized in that the cross section of the piston pin matching with the blind hole and the central shaft hole is a non-circular irregular cross section.

6. A safety gas cylinder with a slow release valve according to claim 1, characterized by comprising an operating lever which is detachably connected to the operating hole through the operating window.

7. The safety gas cylinder with the slow release valve according to claim 1, wherein the lower end of the thread connecting sleeve is provided with an external thread, and the opening of the gas cylinder body is provided with an internal thread.