A gas self-closing valve

Abstract

The present invention relates to a gas self-closing valve, comprising a valve body, a switch mechanism and a speed control mechanism, wherein the switch mechanism, the valve body and the speed control mechanism are connected in sequence, the valve body comprises a shell, an air inlet end, an air outlet end and a lifting button, the switch mechanism comprises a straight cylinder, a rotating cylinder, a limit spring, a flow guide, a shielding member and a connecting member, and the speed control mechanism comprises a connecting end, a main body, a button, an adjusting spring, a ball, a support and an exhaust end. The gas self-closing valve is exquisitely designed, and the front end is provided with a knob-type switch structure to improve the sealing effect, and the rear end is designed with an adjustable structure to be able to be adjusted according to the actual flow limit, and the movable structure design of the valve body allows the lifting button to be adjusted in direction after installation, thereby improving the convenience of later operation.

Description

Technical Field

[0001] The invention particularly relates to a gas self-closing valve. Background Art

[0002] The self-closing valve is installed on the pipeline of the low-pressure gas system. When the pipeline gas supply pressure is under-pressure or over-pressure, it can automatically close without electricity or other external power and must be opened manually. The self-closing valve installed at the end of the pipeline behind the gas meter and the connection with the hose should have the function of closing when the pressure is lost.

[0003] The self-closing valve of the prior art will leak after being used for a period of time, and the external switch will also leak due to its simple design. Although some self-closing valves are also equipped with flow devices, they all have fixed speed limits and cannot be adjusted according to actual needs.

[0004] Furthermore, during installation, due to unreasonable design, the handles in the prior art are often installed at an angle that causes them to face a wall or a corner, etc., making subsequent operation and maintenance inconvenient. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to provide a gas self-closing valve in order to overcome the deficiencies of the prior art.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a gas self-closing valve, including a valve body, a switch mechanism and a speed control mechanism, wherein the switch mechanism, the valve body and the speed control mechanism are connected in sequence;

[0007] The valve body comprises a shell, an air inlet, an air outlet and a lifting button, wherein the air inlet and the air outlet are respectively arranged at two ends of the shell, the shell is movably connected with the air inlet and the air outlet respectively, the lifting button is arranged at the upper end of the shell, the switch mechanism is sealedly connected with the air inlet, the speed control mechanism is sealedly connected with the air outlet, and the air inlet is connected with the air outlet through the inside of the shell;

[0008] The switch mechanism comprises a straight cylinder, a rotating cylinder, a limit spring, a flow guide, a shielding member and a connecting member, one end of the straight cylinder is connected to the air inlet end, the connecting member is arranged at the end of the straight cylinder away from the air inlet end, the rotating cylinder is sleeved on the straight cylinder, the rotating cylinder and the straight cylinder are coaxially arranged, the flow guide is arranged in the straight cylinder, the shielding member is arranged at a side of the flow guide away from the air inlet end, one end of the limit spring is connected to the air inlet end, the other end of the limit spring is connected to the flow guide, the limit spring is in a compressed state, and the flow guide The guide member and the shielding member are both cylindrical, the diameters of the guide member and the shielding member are equal, the limit spring, the guide member and the shielding member are all coaxially arranged with the straight cylinder, the outer circumferences of the guide member and the shielding member are both sealed and connected with the straight cylinder, the outer circumference of the shielding member is connected with the inner wall of the rotating cylinder, the guide member is symmetrically provided with two guide holes, the shape of the guide holes is fan-shaped, the angle of the guide holes is 90°, the shielding member is provided with two switch holes of the same size and shape as the guide holes, and the positions of the switch holes correspond to the positions of the guide holes;

[0009] The speed control mechanism includes a connecting end, a main body, a button, an adjusting spring, a ball, a support and an exhaust end, wherein the connecting end is connected to the exhaust end, and the connecting end is communicated with the exhaust end through the main body, the ball is arranged in the main body, the connecting end and the exhaust end are respectively located on both sides of the ball, and there is a gap between the connecting end and the exhaust end and the ball, the support is arranged below the ball, and an arc groove matching the ball is provided on the support, and the center of the arc groove coincides with the center of the ball, the adjusting spring is vertically arranged in the main body, the button is arranged at the upper end of the adjusting spring, the button is located outside the main body, the upper end of the adjusting spring is connected to the button, and the lower end of the adjusting spring is connected to the ball, and the adjusting spring is in a compressed state.

[0010] Preferably, a groove is provided at the upper end of the ball, and the lower end of the adjustment spring extends into the groove of the ball.

[0011] Preferably, the limit spring is a conical spring, and the end of the limit spring with a smaller diameter is connected to the guide member.

[0012] The beneficial effect of the present invention is that the gas self-closing valve is cleverly designed, the front end is provided with a knob-type switch structure, which improves the sealing effect, the rear end is designed with an adjustable structure, and can be adjusted according to the actual flow limit, and the movable structure design of the valve body allows the direction of the knob to be adjusted after installation, thereby improving the convenience of subsequent operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1It is a structural schematic diagram of the gas self-closing valve of the present invention;

[0015] Figure 2 It is a structural schematic diagram of the gas self-closing valve of the present invention;

[0016] Figure 3 yes Figure 2 A magnified view of part A;

[0017] Figure 4 yes Figure 2 A magnified view of part B;

[0018] Figure 5 It is a structural schematic diagram of the flow guide member of the gas self-closing valve of the present invention;

[0019] Figure 6 This is a schematic diagram of the structure of the shielding member of the gas self-closing valve of the present invention.

[0020] In the figure: 1. Shell, 2. Air inlet end, 3. Air outlet end, 4. Lifting button, 5. Straight cylinder, 6. Rotating cylinder, 7. Limiting spring, 8. Guide piece, 9. Shielding piece, 10. Connecting piece, 11. Connecting end, 12. Button, 13. Adjusting spring, 14. Ball, 15. Support, 16. Exhaust end. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0022] like Figure 1-6 As shown, a gas self-closing valve comprises a valve body, a switch mechanism and a speed control mechanism, wherein the switch mechanism, the valve body and the speed control mechanism are connected in sequence;

[0023] The valve body comprises a shell 1, an air inlet end 2, an air outlet end 3 and a lifting button 4, wherein the air inlet end 2 and the air outlet end 3 are respectively arranged at two ends of the shell 1, and the shell 1 is movably connected with the air inlet end 2 and the air outlet end 3 respectively, and the lifting button 4 is arranged at the upper end of the shell 1, the switch mechanism is sealedly connected with the air inlet end 2, the speed control mechanism is sealedly connected with the air outlet end 3, and the air inlet end 2 is connected with the air outlet end 3 through the interior of the shell 1;

[0024] In fact, the valve body is also provided with conventional self-closing switch structures such as a valve stem and a valve core. Here, the air inlet end 2 and the air outlet end 3 are sealed and connected with the external parts to realize the conventional flow and gas guiding functions, and a movable connection is realized with the shell 1, similar to the connection method of a rotary joint, so that the shell 1 can be freely rotated. After the installation is completed, the angle of the lifting button 4 can be adjusted so that it is always facing the operator, which can make the subsequent operation and maintenance more convenient.

[0025] The switch mechanism includes a straight cylinder 5, a rotating cylinder 6, a limit spring 7, a flow guide 8, a shielding member 9 and a connecting member 10. One end of the straight cylinder 5 is connected to the air inlet end 2, and the connecting member 10 is arranged at the end of the straight cylinder 5 away from the air inlet end 2. The rotating cylinder 6 is sleeved on the straight cylinder 5, and the rotating cylinder 6 and the straight cylinder 5 are coaxially arranged. The flow guide 8 is arranged in the straight cylinder 5, and the shielding member 9 is arranged on the side of the flow guide 8 away from the air inlet end 2. One end of the limit spring 7 is connected to the air inlet end 2, and the other end of the limit spring 7 is connected to the flow guide 8. The limit spring 7 is in a compressed state. state, the guide member 8 and the shielding member 9 are both cylindrical, the diameters of the guide member 8 and the shielding member 9 are equal, the limit spring 7, the guide member 8 and the shielding member 9 are coaxially arranged with the straight cylinder 5, the outer circumferences of the guide member 8 and the shielding member 9 are sealed and connected with the straight cylinder 5, the outer circumference of the shielding member 9 is connected with the inner wall of the rotating cylinder 6, the guide member 8 is symmetrically provided with two guide holes, the shape of the guide holes is fan-shaped, the angle of the guide holes is 90°, and the shielding member 9 is provided with two switch holes of the same size and shape as the guide holes, and the positions of the switch holes correspond to the positions of the guide holes;

[0026] The connecting piece 10 here is mainly an external air pipe, and the rotating cylinder 6 actually plays the role of a rotary switch. The airflow passes through the connecting piece 10, flows through the switch hole and the guide hole, and then enters the air inlet end 2, and then enters the valve body.

[0027] In fact, the guide member 8 and the shielding member 9 form a rotary switch structure. When the switch hole and the guide hole are facing each other, the maximum conduction state is formed. The shielding member 9 is driven to rotate by the rotation of the rotating cylinder 6. After rotating 90°, the unopened part of the shielding member 9 just blocks the guide hole of the guide member to achieve the closing function. The limit spring 7 is mainly used to support the guide member 8 so that it can be close to the shielding member 9 to improve the sealing effect between the two components. The limit spring 7 is designed to be conical, mainly to improve the convenience of installation.

[0028] The above-mentioned rotary switch structure has better sealing performance and longer service life than the existing ball valve structure. The ball valve in the prior art is prone to leakage due to the entry of impurities, while the rotary switch structure can easily self-remove impurities during its own opening or closing process.

[0029] The speed control mechanism includes a connecting end 11, a main body, a button 12, an adjusting spring 13, a ball 14, a support 15 and an exhaust end 16, wherein the connecting end 11 is connected to the air outlet end 3, the connecting end 11 is communicated with the exhaust end 16 through the main body, the ball 14 is arranged in the main body, the connecting end 11 and the exhaust end 16 are respectively located on both sides of the ball 14, and a gap is provided between the connecting end 11 and the exhaust end 16 and the ball 14, the support 15 is arranged below the ball 14, an arc groove matching the ball 14 is provided on the support 15, and the center of the arc groove coincides with the center of the ball 14, the adjusting spring 13 is vertically arranged in the main body, the button 12 is arranged at the upper end of the adjusting spring 13, the button 12 is located outside the main body, the upper end of the adjusting spring 13 is connected to the button 12, the lower end of the adjusting spring 13 is connected to the ball 14, and the adjusting spring 13 is in a compressed state.

[0030] The airflow enters the connecting end 11 from the air outlet end 3, and then enters the main body, and enters the exhaust end 16 through the gap between the connecting end 11 and the ball 14 and the gap between the exhaust end 16 and the ball 14. The button 12 is pressed to adjust the tightness of the adjustment spring 13, that is, to adjust the elastic force of the adjustment spring 13.

[0031] In the normal state, the ball 14 is pressed in the arc groove of the support 15 by the adjusting spring 13, and the thrust generated by the airflow entering from the connecting end 11 on the ball 14 cannot cause the ball 14 to shift. When the airflow is too large, a larger thrust will be generated on the ball 14. At this time, when the lateral thrust (opposite to the thrust generated by the airflow) of the arc groove of the support 15 on the ball 14 is smaller than the thrust generated by the airflow on the ball 14, the ball 14 will break away from the arc groove and move to the side away from the connecting end 11, that is, close to the exhaust end 16. When the thrust of the airflow on the ball 14 can completely offset the lateral deformation force of the adjusting spring 13, the ball 14 will be completely pressed on the exhaust end 16, thereby blocking the hole of the exhaust end 16 and realizing the interception seal.

[0032] Here, an arcuate groove is provided on the support 15, which has higher sensitivity than a rectangular groove or grooves of other shapes, because the arcuate groove can actually fully fit with the ball 14, so that the ball 14 can slide out of the groove more easily. Here, the upper limit value of the flow rate is controlled by the degree of squeezing of the adjustment spring 13 by the button 12, that is, the tighter the pressure, the greater the upper line flow value. This structure is not only highly sensitive, but also easy to adjust and has a wide range of applications.

[0033] Moreover, after installation, the speed control mechanism as a whole can actually rotate. For example, when the button 12 is located at the 12 o'clock position of the main body, the ball 14 is in a stretched state with respect to the spring 13 due to its own gravity, and when the button 12 is located at the 6 o'clock position of the main body, the ball 14 is in a squeezed state with respect to the spring 13 due to its own gravity. The sensitivities of the two states are also different, including when the button 12 is located at the 3 o'clock or 9 o'clock position of the main body. In this adjustment state, the peak value is the largest when the ball 14 is located at the 6 o'clock position.

[0034] Here, the button 12 can be pressed in advance to make it stay in a certain position, thereby realizing static control and adjustment of the length of the spring 13. Then, dynamic adjustment can be realized by rotating the whole. The combination of the two adjustment methods improves the accuracy of the adjustment and the practicality of use.

[0035] Preferably, a groove is provided at the upper end of the ball 14 , and the lower end of the adjustment spring 13 extends into the groove of the ball 14 .

[0036] Preferably, the limit spring 7 is a conical spring, and the end of the limit spring 7 with a smaller diameter is connected to the guide member.

[0037] Compared with the existing technology, the gas self-closing valve is exquisitely designed. The front end is set up with a knob-type switch structure to improve the sealing effect. The rear end is designed with an adjustable structure and can be adjusted according to the actual flow limit. Through the movable structural design of the valve body, the direction of the lifting button can be adjusted after installation, which improves the convenience of later operations.

[0038] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A gas self-closing valve, comprising a valve body, characterized in that: It also includes a switch mechanism and a speed control mechanism, wherein the switch mechanism, the valve body and the speed control mechanism are connected in sequence; The valve body comprises a shell, an air inlet, an air outlet and a lifting button, wherein the air inlet and the air outlet are respectively arranged at two ends of the shell, the shell is movably connected with the air inlet and the air outlet respectively, the lifting button is arranged at the upper end of the shell, the switch mechanism is sealedly connected with the air inlet, the speed control mechanism is sealedly connected with the air outlet, and the air inlet is connected with the air outlet through the inside of the shell; The switch mechanism comprises a straight cylinder, a rotating cylinder, a limit spring, a flow guide, a shielding member and a connecting member, one end of the straight cylinder is connected to the air inlet end, the connecting member is arranged at the end of the straight cylinder away from the air inlet end, the rotating cylinder is sleeved on the straight cylinder, the rotating cylinder and the straight cylinder are coaxially arranged, the flow guide is arranged in the straight cylinder, the shielding member is arranged at a side of the flow guide away from the air inlet end, one end of the limit spring is connected to the air inlet end, the other end of the limit spring is connected to the flow guide, the limit spring is in a compressed state, and the flow guide The guide member and the shielding member are both cylindrical, the diameters of the guide member and the shielding member are equal, the limit spring, the guide member and the shielding member are all coaxially arranged with the straight cylinder, the outer circumferences of the guide member and the shielding member are both sealed and connected with the straight cylinder, the outer circumference of the shielding member is connected with the inner wall of the rotating cylinder, the guide member is symmetrically provided with two guide holes, the shape of the guide holes is fan-shaped, the angle of the guide holes is 90°, the shielding member is provided with two switch holes of the same size and shape as the guide holes, and the positions of the switch holes correspond to the positions of the guide holes; The speed control mechanism includes a connecting end, a main body, a button, an adjusting spring, a ball, a support and an exhaust end, wherein the connecting end is connected to the exhaust end, and the connecting end is communicated with the exhaust end through the main body, the ball is arranged in the main body, the connecting end and the exhaust end are respectively located on both sides of the ball, and there is a gap between the connecting end and the exhaust end and the ball, the support is arranged below the ball, and an arc groove matching the ball is provided on the support, and the center of the arc groove coincides with the center of the ball, the adjusting spring is vertically arranged in the main body, the button is arranged at the upper end of the adjusting spring, the button is located outside the main body, the upper end of the adjusting spring is connected to the button, and the lower end of the adjusting spring is connected to the ball, and the adjusting spring is in a compressed state.

2. The gas self-closing valve according to claim 1, characterized in that: The upper end of the ball is provided with a groove, and the lower end of the adjusting spring extends into the groove of the ball.

3. The gas self-closing valve according to claim 1, characterized in that: The limit spring is a conical spring, and the end of the limit spring with a smaller diameter is connected to the flow guide.

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