CN211738642U

CN211738642U - Novel safety gas cylinder valve

Info

Publication number: CN211738642U
Application number: CN201922304486.9U
Authority: CN
Inventors: 徐象庆; 徐杰伟
Original assignee: Xiantong Xiangqing Taizhou Safety Equipment Co ltd
Current assignee: TAIZHOU TO CELEBRATE SAFETY PROTECTIVE EQUIPMENT CO Ltd
Priority date: 2018-12-22
Filing date: 2019-12-20
Publication date: 2020-10-23
Anticipated expiration: 2029-12-20
Also published as: CN110873284A; CN109469822A

Abstract

The utility model relates to a novel safety gas cylinder valve, which comprises a valve body, wherein the lower end of the valve body is provided with a current-limiting protector, the current-limiting protector comprises a main body, a current-limiting valve and a material blocking pipe, the surface of the main body is provided with a thread section, a first cavity and a second cavity for gas transmission are arranged in the main body, and a chamfer is arranged at the joint of the first cavity and the second cavity; an installation groove is formed in the first cavity, the upper end of the flow limiting valve is arranged in the installation groove, and the lower end of the flow limiting valve is arranged in the second cavity; the utility model can gradually release the high-pressure gas inside the gas cylinder valve when the gas cylinder valve is broken through the gap generated when the chamfer is abutted with the conical round platform, so that the gas cylinder safety valve has higher safety performance, thereby eliminating the potential safety hazard of the gas cylinder valve and protecting the safety of users and peripheral personnel; meanwhile, the flow limiting valve can be firmly positioned in the main body through the design of the baffle pipe, and the stability of the structure is enhanced.

Description

Novel safety gas cylinder valve

Technical Field

The utility model relates to a novel safe gas cylinder valve.

Background

At present, various gas cylinders are widely used in various fields, such as air respirators in the fire fighting field, oxygen cylinders in the medical field, and the like. And the inside high-pressure gas that often stores of these gas cylinders, when meetting unexpected situation and leading to the gas cylinder valve to break off, thereby the high-pressure gas in the gas cylinder releases in the twinkling of an eye and leads to the gas cylinder to scurry everywhere and cause the injury to user and personnel nearby, however, the gas cylinder valve on the existing market lacks this kind of safeguard function that can break off after the accident.

Disclosure of Invention

The invention aims to provide a novel safety gas cylinder valve which comprises a valve body, wherein a current-limiting protector is arranged at the lower end of the valve body, the current-limiting protector comprises a main body, a current-limiting valve and a material blocking pipe, a threaded section is arranged on the surface of the main body, a first cavity and a second cavity for gas transmission are arranged in the main body, and a chamfer is arranged at the joint of the first cavity and the second cavity; an installation groove is formed in the first cavity, the upper end of the flow limiting valve is arranged in the installation groove, and the lower end of the flow limiting valve is arranged in the second cavity;

an air passage is formed in the flow limiting valve, an air outlet is formed in the bottom end of the air passage, a conical round table is formed at the lower end of the flow limiting valve, and a vent groove is formed at the lower end of the conical round table;

the object blocking pipe is arranged at the lower end of the main body, the upper end of the object blocking pipe is abutted to the lower end face of the flow limiting valve, the middle of the object blocking pipe is provided with an airflow channel, and the airflow channel is connected with the vent groove.

Preferably, a first section surface is formed on the upper end surface of the mounting groove, a second section surface is formed on the lower end surface of the mounting groove, and the plane where the upper end part of the threaded section is located between the first section surface and the second section surface.

Preferably, the radial sectional area of the mounting groove of the first cavity is larger than that of the first cavity, and the radial sectional area of the second cavity is larger than that of the mounting groove of the first cavity.

Preferably, the filter element is arranged in the object blocking pipe, the filter element is detachably arranged at the upper end of the object blocking pipe, and the air flow passing through the vent groove passes through the filter element and enters the air flow channel.

Preferably, the surface of the main body is provided with an air outlet communicated with the mounting groove of the first cavity.

Preferably, a gap exists between the upper end of the flow limiting valve and the mounting groove of the first cavity.

Preferably, the periphery of the conical circular truncated cone is a conical surface, and the surface roughness of the conical surface is greater than 1.6.

Preferably, the valve body and the current-limiting protector are integrally formed.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. the utility model plugs up the broken gas leakage port by the butting of the chamfer and the conical round platform, and the gap generated by the chamfer and the conical round platform can gradually release the high-pressure gas inside the gas cylinder valve when the gas cylinder valve is broken, so that the novel safety gas cylinder valve has higher safety performance, thereby eliminating the potential safety hazard of the gas cylinder valve and protecting the safety of users and peripheral personnel; meanwhile, the flow limiting valve can be firmly positioned in the main body through the design of the baffle pipe, and the stability of the structure is enhanced.

2. The utility model discloses a cracked position of valve body has been injectd in the restriction of screw thread section scope to when making the cylinder valve fracture, current-limiting protector can normally work.

3. The utility model discloses a keep off thing pipe and promote the restriction valve and remove, make the seamless butt of restriction valve and the first section face of mounting groove to make gaseous route according to the design flow.

4. The utility model discloses a filter element's setting has improved gaseous quality, has increased the service life of gas cylinder.

5. The utility model discloses a design of venthole makes the gas cylinder exist in the high-pressure gas of gas cylinder valve in the in-process of dismantling can discharge with safe mode, has reduced the risk that exists in the use.

Drawings

FIG. 1 is a schematic diagram of a main structure of a preferred embodiment of the present invention;

FIG. 2 is an exploded view of a current limiting protector according to a preferred embodiment of the present invention;

FIG. 3 is a schematic view of the novel safety cylinder valve of a preferred embodiment of the present invention installed in a gas cylinder;

FIG. 4 is a schematic diagram of a current limiting protector according to a preferred embodiment of the present invention in an operating state;

FIG. 5 is a schematic view of a current limiting protector according to a preferred embodiment of the present invention in the event of a valve body rupture;

FIG. 6 is a schematic view of a flow restriction valve according to a preferred embodiment of the present invention;

fig. 7 is an enlarged view of a portion a in fig. 5.

The reference numerals in the figures denote the meanings: 1-a body; 2-a first cavity; 3-a second cavity; 4-a flow-limiting valve; 5-a barrier tube; 6-current limiting protector; 7-a valve body; 8-a gas cylinder; 11-air outlet holes; 21-mounting grooves; 22-a first section; 23-a second section; 31-chamfering; 41-upper end; 42-lower end; 421-ventilating column; 422-a conical round table; 423-ventilation groove; 424-air outlet; 43-airway; 51-a filter element; 52-airflow path.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The utility model discloses a novel safe gas cylinder valve, including valve body 7, the lower extreme of valve body 7 is provided with current-limiting protector 6, and current-limiting protector 6 includes main part 1, restriction valve 4 and keeps off thing pipe 5, main part 1 surface is provided with screw thread section 12, first cavity 2 and second cavity 3 for gas transmission have inside main part 1, and the junction of first cavity 2 and second cavity 3 is provided with a chamfer 31; the upper end 41 of the restriction valve 4 is disposed in the mounting groove 21, and the lower end 42 of the restriction valve 4 is disposed inside the second chamber 3.

An air passage 43 is formed in the flow limiting valve 4, an air outlet 424 is formed in the bottom end of the air passage 43 to realize air circulation between the first cavity 2 and the second cavity 3, a conical round table 422 is formed at the lower end of the flow limiting valve 4, and an air groove 423 is formed at the lower end of the conical round table to realize air circulation between the baffle pipe 5 and the second cavity 3.

The object blocking pipe 5 is installed at the lower end of the main body 1, the upper end of the object blocking pipe 5 is abutted to the lower end face of the flow limiting valve 4, the middle of the object blocking pipe is provided with an airflow channel 52, the airflow channel 52 is connected with the vent groove 423, the object blocking pipe 5 is in threaded connection with the lower end of the main body 1, and the object blocking pipe 5 pushes the flow limiting valve 4 to move upwards to realize seamless abutting of the flow limiting valve 4 and the first section face 22 of the installation groove.

In this embodiment, the mounting groove 21 has a first section 22 formed on an upper end surface thereof and a second section 23 formed on a lower end surface thereof, and the plane of the upper end of the threaded section 12 is located between the first section and the second section.

In this embodiment, the radial cross-sectional area of the mounting groove 21 of the first cavity 2 is larger than that of the first cavity 2, and the radial cross-sectional area of the second cavity 3 is larger than that of the mounting groove 21 of the first cavity 2.

The filter element 51 is arranged inside the baffle pipe 5, the filter element 51 is arranged at the upper end of the baffle pipe 5, in the embodiment, the filter element 51 is connected with the baffle pipe 5 through threads, and the airflow passing through the vent groove 423 passes through the filter element 51 and enters the airflow channel 52.

The surface of the main body 1 is provided with an air outlet 11 communicated with the mounting groove 21 of the first cavity 2; as shown in fig. 1, the body 1 and the gas cylinder 8 are connected by a threaded section provided on the surface of the body, and are sealed by a gasket.

A gap exists between the upper end 41 of the flow limiting valve 4 and the mounting groove 21 of the first cavity 2, and when the gas cylinder is disassembled, high-pressure gas in the valve slowly flows out from the gas outlet through the gap.

The periphery of the conical round platform 422 is a conical surface, the surface roughness of the conical surface is greater than 1.6, and when the conical surface abuts against the chamfer 31, a gap with a proper size exists between the conical surface and the chamfer so that gas can flow out.

The valve body 7 and the current-limiting protector 6 are integrally formed.

The utility model discloses a theory of operation does: when the gas cylinder is being inflated, the gas enters the flow-limiting protector 6 through the valve body 7, firstly, the gas passes through the first chamber 2, then enters the second chamber 3 through the gas outlet 424, then the gas flow passing through the vent groove 423 passes through the filter element 51 into the gas flow channel 52, and after being filtered by the filter element 51 in the baffle pipe 5, the gas enters the gas cylinder 8. In addition, since the threaded and unthreaded transition portions are stress-concentrating, more easily breakable portions, the design of the extent of the thread segments ensures that the upper ends of the thread segments 12 lie in a plane having a height less than the first segment plane and greater than the second segment plane. Therefore, when the novel safety gas cylinder valve is accidentally impacted, the part of the main body in the range of the first section surface and the second section surface of the first cavity 2 is easier to break relative to other parts. At this time, the air pressure in the air bottle 8 pushes the flow limiting valve 4 outwards until the conical round platform in the flow limiting valve 4 abuts against the chamfer 31, so that the broken air leakage port is blocked, then the high-pressure air in the air bottle 8 enters the blocking pipe 5, the airflow entering the filter element 51 passes through the vent groove 423 and enters the second cavity 3, then enters the first cavity 2 through the gap formed by the conical round platform 422 and the chamfer 31, and finally slowly enters the air from the upper end 41 of the flow limiting valve through the air outlet 424.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a novel safe gas cylinder valve, includes valve body (7), its characterized in that: the lower end of the valve body (7) is provided with a current-limiting protector (6), the current-limiting protector (6) comprises a main body (1), a current-limiting valve (4) and a material blocking pipe (5), a thread section (12) is arranged on the surface of the main body (1), a first cavity (2) and a second cavity (3) for gas transmission are arranged in the main body (1), and a chamfer (31) is arranged at the joint of the first cavity (2) and the second cavity (3); an installation groove (21) is formed in the first cavity (2), the upper end (41) of the flow limiting valve (4) is arranged in the installation groove (21), and the lower end (42) of the flow limiting valve (4) is arranged in the second cavity (3);

an air passage (43) is formed in the flow limiting valve (4), an air outlet (424) is formed in the bottom end of the air passage, a conical round table (422) is formed at the lower end of the flow limiting valve (4), and a vent groove (423) is formed at the lower end of the conical round table;

the material blocking pipe (5) is installed at the lower end of the main body (1), the upper end of the material blocking pipe (5) is abutted to the lower end face of the flow limiting valve (4), an airflow channel (52) is formed in the middle of the material blocking pipe, and the airflow channel (52) is connected with the vent groove (423).

2. The new safety cylinder valve as claimed in claim 1, wherein: the mounting groove (21) upper end face shaping has first section face (22), and the lower extreme face shaping has second section face (23), the upper end position plane of screw thread section (12) is located between first section face and the second section face.

3. A novel safety cylinder valve according to claim 1 or 2, characterized in that: the radial sectional area of the mounting groove (21) of the first cavity (2) is larger than that of the first cavity (2), and the radial sectional area of the second cavity (3) is larger than that of the mounting groove (21) of the first cavity (2).

4. The new safety cylinder valve as claimed in claim 1, wherein: the filter element (51) is arranged in the baffle pipe (5), the filter element (51) is installed at the upper end of the baffle pipe (5), and the airflow passing through the vent groove (423) passes through the filter element (51) and enters the airflow channel (52).

5. A novel safety cylinder valve as claimed in claim 2, wherein: the surface of the main body (1) is provided with an air outlet (11) communicated with the mounting groove (21) of the first cavity (2).

6. The novel safety cylinder valve as claimed in claim 4, wherein: a gap exists between the upper end (41) of the flow limiting valve (4) and the mounting groove (21) of the first cavity (2).

7. A novel safety cylinder valve as claimed in claim 1, wherein: the periphery of the conical round platform (422) is a conical surface, and the surface roughness of the conical surface is more than 1.6.

8. The new safety cylinder valve as claimed in claim 5, wherein: the valve body (7) and the current-limiting protector (6) are integrally formed.