CN211738642U - A new type of safety gas cylinder valve - Google Patents

Abstract

The utility model relates to a novel safety gas cylinder valve, comprising a valve body, a flow-limiting protector is arranged at the lower end of the valve body, the flow-limiting protector comprises a main body, a flow-restricting valve and a blocking pipe, and the surface of the main body is provided with a flow-limiting protector. A threaded segment, the inside of the main body has a first cavity and a second cavity for gas transmission, a chamfer is set at the joint of the first cavity and the second cavity; an installation groove is opened in the first cavity, and the The upper end of the restrictor valve is arranged in the installation groove, and the lower end of the restrictor valve is arranged inside the second cavity; the utility model makes the inside of the gas cylinder valve broken when the chamfer is abutted with the conical cone. The high-pressure gas can be gradually released from the gap, so that the gas cylinder safety valve has high safety performance, thus eliminating the safety hazard existing in the gas cylinder valve and protecting the safety of users and surrounding personnel; Designed to securely position the restrictor valve inside the main body, enhancing the stability of the structure.

Description

A new type of safety gas cylinder valve

technical field

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

Background technique

At present, various gas cylinders are widely used in various fields, such as air respirators in the field of fire protection, oxygen cylinders in the medical field and so on. These gas cylinders often store high-pressure gas. When an unexpected situation causes the cylinder valve to break, the high-pressure gas in the gas cylinder is released instantaneously, which will cause the gas cylinder to run around and cause harm to users and nearby people. , however, the cylinder valves currently on the market lack this protection against accidental disconnection.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a novel safety gas cylinder valve, which includes a valve body, and a flow-limiting protector is arranged at the lower end of the valve body. A threaded section is provided, the inside of the main body has a first cavity and a second cavity for gas transmission, a chamfer is set at the joint of the first cavity and the second cavity; an installation groove is opened in the first cavity, The upper end of the restrictor valve is arranged in the installation groove, and the lower end of the restrictor valve is arranged inside the second cavity;

The restrictor valve is provided with an air passage, the bottom end of the air passage is provided with an air outlet, the lower end of the restrictor valve is formed with a conical cone, and the lower end of the cone cone is provided with a ventilation groove;

The blocking pipe is installed at the lower end of the main body, the upper end of the blocking pipe is in contact with the lower end surface of the restrictor valve, and an airflow channel is opened in the middle of the blocking pipe, and the airflow channel is connected with the ventilation groove.

Preferably, the upper end surface of the installation groove is formed with a first segment surface, the lower end surface is formed with a second segment surface, and the plane where the upper end of the thread segment is located is located between the first segment surface and the second segment surface.

Preferably, the radial cross-sectional area of the installation groove of the first cavity is larger than the radial cross-sectional area of the first cavity, and the radial cross-sectional area of the second cavity is larger than the radial cross-sectional area of the installation groove of the first cavity. .

Preferably, a filter element is provided inside the blocking pipe, the filter element is detachably installed on the upper end of the blocking pipe, and the airflow passing through the ventilation groove passes through the filter element and enters the airflow channel.

Preferably, the surface of the main body is provided with an air outlet that communicates with the installation groove of the first cavity.

Preferably, there is a gap between the upper end of the restrictor valve and the installation groove of the first cavity.

Preferably, the outer circumference of the conical frustum 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 present utility model has the following outstanding and beneficial technical effects:

1. The utility model makes the air leakage after the fracture be blocked by chamfering and abutting the conical circular platform, and the high pressure gas inside the gas cylinder valve can be gradually released from the gap when the gap produced by the two is broken, The new safety gas cylinder valve has high safety performance, thereby eliminating the potential safety hazard existing in the gas cylinder valve and protecting the safety of users and surrounding personnel; at the same time, through the design of the blocking pipe, the restrictor valve can be firmly positioned Inside the main body, the stability of the structure is enhanced.

2. The utility model limits the position where the valve body breaks through the limitation of the range of the threaded section, so that when the gas cylinder valve breaks, the current limiting protector can work normally.

3. The utility model pushes the restrictor valve to move through the blocking pipe, so that the restrictor valve is in seamless contact with the first section of the installation groove, so that the gas flows according to the designed route.

4. The utility model improves the quality of the gas through the arrangement of the filter element, and increases the service life of the gas cylinder.

5. The design of the air outlet of the present invention enables the high-pressure gas existing in the gas cylinder valve to be discharged in a safe manner during the disassembly process of the gas cylinder, thereby reducing the risks existing in the use process.

Description of drawings

Fig. 1 is the main structure schematic diagram of a preferred embodiment in the utility;

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

Fig. 3 is the schematic diagram that the novel safety gas cylinder valve of a preferred embodiment of the utility model is installed in the gas cylinder;

4 is a schematic diagram of a current limiting protector in a working state according to a preferred embodiment of the present invention;

FIG. 5 is a schematic diagram of the current limiting protector in a preferred embodiment of the present application when the valve body is broken;

6 is a schematic structural diagram of a flow restrictor valve according to a preferred embodiment of the present invention;

FIG. 7 is an enlarged view of part A in FIG. 5 .

The meanings of the symbols in the figure: 1-main body; 2-first cavity; 3-second cavity; 4-restrictor valve; 5-blocker pipe; 8-gas cylinder; 11-air outlet; 21-installation groove; 22-first segment surface; 23-second segment surface; 31-chamfer; 41-upper end; 42-lower end; 421-vent column; 422-cone 423-ventilation groove; 424-air outlet; 43-airway; 51-filter element; 52-air flow channel.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings.

A novel safety gas cylinder valve shown in the present utility model includes a valve body 7, and a current limiting protector 6 is arranged at the lower end of the valve body 7, and the current limiting protector 6 includes a main body 1, a current limiting valve 4 and a blocking pipe 5 , the surface of the main body 1 is provided with a threaded segment 12, the main body 1 has a first cavity 2 and a second cavity 3 for gas transmission inside, and a joint between the first cavity 2 and the second cavity 3 is provided with a Chamfer 31 ; the upper end 41 of the restrictor valve 4 is arranged in the installation groove 21 , and the lower end 42 of the restrictor valve 4 is arranged inside the second cavity 3 .

The restrictor valve 4 is provided with an air passage 43, and the bottom end of the air passage 43 is provided with an air outlet 424 to realize the gas circulation between the first cavity 2 and the second cavity 3. The lower end of the restrictor valve 4 is formed with an air outlet 424. The conical table 422 is provided with a ventilation groove 423 at the lower end thereof, so as to realize the gas circulation between the blocking pipe 5 and the second cavity 3 .

The blocking pipe 5 is installed on the lower end of the main body 1 , the upper end of the blocking pipe 5 is in contact with the lower end surface of the restrictor valve 4 , and an airflow channel 52 is opened in the middle of the blocking pipe, and the airflow channel 52 is connected with the ventilation groove 423 . , the blocking pipe 5 is connected with the lower end of the main body 1 by threads, and the blocking pipe 5 pushes the restrictor valve 4 to move upward to realize the seamless contact between the restrictor valve 4 and the first section surface 22 of the installation groove.

In this embodiment, a first segment surface 22 is formed on the upper end surface of the installation groove 21, and a second segment surface 23 is formed on the lower end surface. The plane where the upper end of the thread segment 12 is located is located between the first segment surface and the second segment surface between the faces.

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

A filter element 51 is arranged inside the barrier pipe 5, and the filter element 51 is installed on the upper end of the barrier pipe 5. In this embodiment, the filter element 51 is connected with the barrier pipe 5 by threads, and the airflow passing through the ventilation groove 423 passes through. The filter element 51 enters the airflow channel 52 .

The surface of the main body 1 is provided with an air outlet 11 that communicates with the installation groove 21 of the first cavity 2; as shown in FIG. .

There is a gap between the upper end 41 of the restrictor valve 4 and the installation groove 21 of the first cavity 2. When the gas cylinder is disassembled, the high-pressure gas in the valve passes through the gap and slowly flows out from the gas outlet.

The outer circumference of the conical cone 422 is a conical surface, and the surface roughness of the conical surface is greater than 1.6. When the conical surface abuts against the chamfer 31, there will be a gap of suitable size between the two so that the gas can flow out.

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

The working principle of the present invention is as follows: when the gas cylinder is inflated, the gas enters the current limiting protector 6 through the valve body 7, first, the gas passes through the first cavity 2, then enters the second cavity 3 through the air outlet 424, and then The airflow passing through the ventilation groove 423 passes through the filter element 51 and enters the airflow channel 52 , and after being filtered by the filter element 51 in the blocking pipe 5 , the gas enters the gas cylinder 8 . In addition, since the transition part with thread and without thread is the part that is more prone to breakage where stress is concentrated, the design of the thread segment range ensures that the height of the plane where the upper end of the thread segment 12 is located is smaller than the first segment surface and higher than the second segment surface. . Therefore, when the novel safety gas cylinder valve is accidentally hit, the part of the main body within the range of the first segment surface and the second segment surface of the first cavity 2 is more likely to be broken than other parts. At this time, the air pressure in the gas cylinder 8 pushes the restrictor valve 4 outward until the conical cone in the restrictor valve 4 abuts against the chamfer 31 so that the broken air leakage port is blocked, and then the high pressure in the gas cylinder 8 The gas enters into the blocking pipe 5, and the gas entering the filter element 51 enters the second cavity 3 through the ventilation groove 423, and then enters the first cavity 2 through the gap formed by the conical cone 422 and the chamfer 31, and finally passes through The air outlet 424 slowly enters the air from the upper end 41 of the restrictor valve.

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention shall be covered by the present invention. within the scope of protection of the utility model.

Claims (8)

1. A novel safety gas cylinder valve, comprising a valve body (7), characterized in that: the lower end of the valve body (7) is provided with a current limiting protector (6), and the current limiting protector (6) comprises a main body ( 1) A restrictor valve (4) and a blocking pipe (5), a threaded section (12) is provided on the surface of the main body (1), and a first cavity (2) for gas transmission is provided inside the main body (1). ) and the second cavity (3), a chamfer (31) is provided at the junction of the first cavity (2) and the second cavity (3); the first cavity (2) is provided with a mounting groove (21) ), the upper end (41) of the restrictor valve (4) is arranged in the installation groove (21), and the lower end (42) of the restrictor valve (4) is arranged inside the second cavity (3); The restrictor valve (4) is provided with an air passage (43), the bottom end of the air passage is provided with an air outlet (424), the lower end of the restrictor valve (4) is formed with a conical circular platform (422), and the lower end of the conical circular platform is provided with an air outlet (424). There is a ventilation groove (423); The blocking pipe (5) is installed on the lower end of the main body (1), the upper end of the blocking pipe (5) is in contact with the lower end surface of the restrictor valve (4), and an air flow passage (52) is opened in the middle of the blocking pipe, and the airflow The channel (52) is connected with the ventilation groove (423). 2. A new type of safety gas cylinder valve according to claim 1, characterized in that: the upper end surface of the installation groove (21) is formed with a first segment surface (22), and the lower end surface is formed with a second segment surface (23) , the plane where the upper end of the thread segment (12) is located is located between the first segment surface and the second segment surface. 3. A new type of safety gas cylinder valve according to claim 1 or 2, characterized in that: the radial cross-sectional area of the installation groove (21) of the first cavity (2) is larger than the diameter of the first cavity (2) The radial cross-sectional area of the second cavity (3) is larger than the radial cross-sectional area of the installation groove (21) of the first cavity (2). 4. A new type of safety gas cylinder valve according to claim 1, characterized in that: a filter element (51) is provided inside the blocking pipe (5), and the filter element (51) is installed in the blocking pipe (5) At the upper end, the airflow passing through the ventilation groove (423) passes through the filter element (51) and enters the airflow channel (52). 5. A novel safety gas cylinder valve according to claim 2, characterized in that: the surface of the main body (1) is provided with an air outlet (11) communicating with the installation groove (21) of the first cavity (2) ). 6. A new type of safety gas cylinder valve according to claim 4, characterized in that there is a gap between the upper end (41) of the restrictor valve (4) and the installation groove (21) of the first cavity (2) . 7 . The novel safety gas cylinder valve according to claim 1 , wherein the outer circumference of the conical cone ( 422 ) is a conical surface, and the surface roughness of the conical surface is greater than 1.6. 8 . 8 . The novel safety gas cylinder valve according to claim 5 , wherein the valve body ( 7 ) and the current limiting protector ( 6 ) are integrally formed. 9 .

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