CN216951851U

CN216951851U - Bidirectional gas overflowing locking valve

Info

Publication number: CN216951851U
Application number: CN202123114964.3U
Authority: CN
Inventors: 刘子隆; 卢清伟; 赵岩; 王良; 范建海; 张娟
Original assignee: Lizhong Sitong Light Alloy Group Co ltd
Current assignee: Lizhong Sitong Light Alloy Group Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-07-12
Anticipated expiration: 2031-12-13

Abstract

The utility model relates to a bidirectional gas overflowing locking valve, which comprises: the valve body and the valve body are internally provided with an olive-shaped air cavity with a large middle part and small two ends; the floating ball moves in the air cavity, and when the floating ball moves to two ends of the air cavity, the air circuit can be blocked; one end of the floating spring is connected with the floating ball, and the other end of the floating spring is connected with the spring support; the spring support is evenly distributed with a plurality of vent holes and used for supporting the floating spring. The utility model adopts a pure mechanical structure to realize the conduction of gas within a rated flow range, and the gas is automatically cut off when the gas flow exceeds the limit. The rated flow can be determined by the thickness and the number of turns of the spring and the size of the floating ball, the forward rated flow and the reverse rated flow can be different, and the valve has the functions of preventing explosion and avoiding air return, and can be applied to flammable and explosive pipelines, precious medium transmission pipelines and the like.

Description

Bidirectional gas overflowing locking valve

Technical Field

The utility model belongs to the field of valves, and particularly relates to a bidirectional gas overflowing locking valve.

Background

The current method for monitoring gas flow is to monitor the flow by using a flowmeter, install an electromagnetic valve on a gas path, control the on-off of a pipeline by the electromagnetic valve, and then control whether the electromagnetic valve closes the pipeline or not by the monitored flow. This approach has the disadvantage of being cost prohibitive and requires a gas flow restriction valve that is simple in construction and cost effective for a wide range of applications.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a bidirectional gas overflow locking valve, which realizes low-cost and high-reliability gas overflow automatic locking.

The technical scheme adopted by the utility model for solving the technical problem is as follows:

a bi-directional gas excess flow latch valve comprising:

the valve body and the valve body are internally provided with an olive-shaped air cavity with a large middle part and small two ends;

the floating ball moves in the air cavity, and when the floating ball moves to two ends of the air cavity, the air circuit can be blocked;

one end of the floating spring is connected with the floating ball, and the other end of the floating spring is connected with the spring support;

the spring support is evenly distributed with a plurality of vent holes and used for supporting the floating spring.

Furthermore, the air cavity comprises three sections, namely a first air cavity, a second air cavity and a third air cavity, the second air cavity is located between the first air cavity and the third air cavity, and the floating ball is installed in the second air cavity.

Further, the spring support is fixedly arranged at the joint position of the first air cavity and the second air cavity.

Further, the diameter of the center section of the second air cavity is larger than the diameters of the sections at two ends and larger than the diameter of the floating ball.

Further, the cross-sectional diameter of the second air chamber gradually decreases from the center to both ends.

Further, the diameters of the two ends of the second air cavity are smaller than the diameter of the floating ball.

Further, the diameters of the first air cavity and the third air cavity are equal to the diameters of the two ends of the second air cavity.

Furthermore, threaded connection parts are formed at two ends of the outer wall of the valve body.

The working principle of the utility model is as follows: a floating ball is arranged in the hollow valve body and connected by a spring, the other end of the spring is fixed on the inner wall of the valve body through a spring support, and when the gas is below the rated flow, the gas flows through the space between the floating ball and the valve cavity; when the gas is larger than the rated flow, the gas pushes the floating ball to compress the spring until the floating ball is contacted with the valve cavity locking surface, and the valve is locked. When abnormal conditions occur, the reverse gas enters and exceeds the extension of the rated flow spring, the floating ball is contacted with the other locking surface of the valve cavity, and the valve is locked.

The utility model has the advantages and positive effects that:

1. the utility model adopts a pure mechanical structure to realize the conduction of gas within a rated flow range, and the gas is automatically cut off after the gas flow exceeds the limit. The rated flow can be determined by the thickness and the number of turns of the spring and the size of the floating ball, the forward rated flow and the reverse rated flow can be different, and the valve has the functions of preventing explosion and avoiding air return, and can be applied to inflammable and explosive pipelines, precious medium transmission pipelines and the like.

2. The valve has simple structure, few movable parts and high reliability. The gas supply control valve can be used for a control gas supply pipeline of a pneumatic valve, can be used for a flammable and explosive gas transmission pipeline, and can be used for other fields sensitive to gas flow overflowing or leakage, such as a toxic and harmful gas transmission pipeline.

Drawings

FIG. 1 is an internal structural view of the present invention;

FIG. 2 is a diagram of the present invention in use (when the forward gas flow is greater than the nominal value);

fig. 3 is a diagram of the present invention in use (when the reverse gas flow is greater than the nominal value).

Detailed Description

The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the utility model.

The utility model provides a two-way gas overflows locking valve, includes valve body 9, floating ball 4, floating spring 2, spring bracket 8, the inside system of valve body 9 has the air cavity, the air cavity comprises three sections, is first air cavity 1, second air cavity 3, third air cavity 6 respectively, second air cavity 3 is located between first air cavity 1 and the third air cavity 6, floating ball 4 is installed second air cavity 3 can be in second air cavity 3 and do axial displacement. The floating ball 4 is fixedly connected with one end of the floating spring 2, the other end of the floating spring 2 is fixedly connected with the spring support 8, the spring support 8 is fixedly arranged at the joint position of the first air cavity 1 and the second air cavity 3, the spring support 8 is in a round cake shape, the outer periphery of the spring support 8 is fixed with the wall of the air cavity, and a plurality of vent holes are uniformly distributed on the spring support 8. So that gas can pass through the spring bracket 8.

The volume of the second air cavity 3 is larger than that of the first air cavity 1 and the third air cavity 6, the diameter of the central section of the second air cavity 3 is larger than that of the sections at two ends and larger than that of the floating ball 4, and the floating ball 4 can move in the second air cavity 3. The diameter of the cross section of the second air cavity 3 is gradually reduced from the center to the two ends, and the second air cavity is in the shape of a football with a large middle part and small two ends. The diameters of the two ends of the second air cavity 3 are smaller than the diameter of the floating ball 4, so that the floating ball 4 is tightly clamped when moving to the two ends of the second air cavity 3, and the function of blocking an air path is achieved. The surfaces of the two ends of the second air cavity 3, which are contacted with the floating ball 4, are locking surfaces 5.

The first air cavity 1 and the third air cavity 6 are respectively communicated and connected with two ends of the second air cavity 3, and the diameters of the first air cavity 1 and the third air cavity 6 are equal to the diameters of two ends of the second air cavity 3.

And threaded connection parts 7 are formed at two ends of the outer wall of the valve body 9 and are used for being connected with an air pipe.

The using method of the utility model comprises the following steps:

when the gas flow is lower than the rated value, the floating ball 4 keeps a gap with the locking surface 5 under the elastic action of the floating spring 2 so that the gas normally flows through (as shown in figure 1).

When the gas flow is larger than the rated value, the floating spring 2 is further compressed, and the floating ball 4 contacts the locking surface 5 to form a closed space to prevent the gas from flowing through. (as shown in figure 2) to achieve the explosion-proof effect.

When the gas impacts reversely, the floating spring 2 stretches after the rated flow is exceeded, the floating ball 4 contacts with the locking surface 5 at the other end, and the valve is locked. (as shown in fig. 3) to achieve the reverse explosion-proof effect.

When the multi-way supply pipeline is damaged and the medium leaks, the valve at the supply end automatically locks due to the sudden rise of the flow. Because the reverse locking flow of the automatic valve is far smaller than the forward locking flow, when a pipeline is damaged, a medium rapidly reversely flows through the automatic valve to be held, and the automatic valve to be held is automatically locked by reverse impact. Meanwhile, the other pipeline works normally, and normal conveying of the medium is not influenced all the time. Thereby achieving the effects of leakage prevention, explosion prevention and uninterrupted supply.

The utility model adopts a pure mechanical structure to realize the conduction of gas within a rated flow range, and the gas is automatically cut off after the gas flow exceeds the limit. The rated flow can be determined by the thickness and the number of turns of the floating spring 2 and the size of the floating ball 4, the forward rated flow and the reverse rated flow can be different, and the valve has the functions of preventing explosion and avoiding air return, and can be applied to flammable and explosive pipelines, precious medium transmission pipelines and the like.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the utility model, and these changes and modifications are all within the scope of the present invention.

Claims

1. The utility model provides a two-way gas overflows locking valve which characterized in that: the method comprises the following steps:

the valve body (9) and the valve body (9) are internally provided with an air cavity which is large in the middle and small at two ends and has a football shape;

the floating ball (4) and the floating ball (4) move in the air cavity, and when the floating ball moves to two ends of the air cavity, the air circuit can be blocked;

one end of the floating spring (2) is connected with the floating ball (4), and the other end of the floating spring (2) is connected with the spring support (8);

the spring support (8), the equipartition has a plurality of air vents on the spring support (8), is used for supporting floating spring (2).

2. The bi-directional gas flow lock valve of claim 1, wherein: the air cavity comprises three sections, namely a first air cavity (1), a second air cavity (3) and a third air cavity (6), the second air cavity (3) is located between the first air cavity (1) and the third air cavity (6), and the floating ball (4) is installed in the second air cavity (3).

3. The bi-directional gas flow lock valve of claim 2, wherein: the spring support (8) is fixedly arranged at the joint position of the first air cavity (1) and the second air cavity (3).

4. The bi-directional gas flow lock valve of claim 2, wherein: the diameter of the central section of the second air cavity (3) is larger than the diameters of the sections at two ends and larger than the diameter of the floating ball (4).

5. The bi-directional gas flow lock valve of claim 2, wherein: the cross-sectional diameter of the second air cavity (3) is gradually reduced from the center to two ends.

6. The bidirectional gas excess flow latch valve of claim 2, wherein: the diameters of the two ends of the second air cavity (3) are smaller than the diameter of the floating ball (4).

7. The bi-directional gas flow lock valve of claim 2, wherein: the diameters of the first air cavity (1) and the third air cavity (6) are equal to the diameters of the two ends of the second air cavity (3).

8. The bi-directional gas flow lock valve of claim 1, wherein: and two ends of the outer wall of the valve body (9) are made into threaded connection parts (7).