CN212536806U - Gas self-closing valve - Google Patents
Gas self-closing valve Download PDFInfo
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- CN212536806U CN212536806U CN202020815229.1U CN202020815229U CN212536806U CN 212536806 U CN212536806 U CN 212536806U CN 202020815229 U CN202020815229 U CN 202020815229U CN 212536806 U CN212536806 U CN 212536806U
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- valve body
- closing
- pull rod
- rod
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Abstract
The utility model discloses a gas self-closing valve, which comprises a left valve body and a right valve body, wherein an under-pressure cut-off device is arranged on the left valve body, a manual opening and closing device is arranged on the right valve body, an over-flow cut-off device is arranged between the left valve body and the right valve body, a first air inlet channel and a second air inlet channel which are communicated are arranged in the left valve body, a valve cover which fixedly installs the under-pressure cut-off device is arranged on the left valve body, and the under-pressure cut-off device comprises a diaphragm, a pull rod, an iron washer; the overflow device comprises a cut-off ejector rod, a mounting seat, a fixed seat and a spring, and a manual opening and closing device is arranged in the right valve body. The utility model discloses have super flow, undervoltage dual safety function that cuts off, further improve the stability of self-closing function of cutting off, better assurance safe in utilization, avoid the emergence of gas incident.
Description
Technical Field
The utility model relates to the technical field of valves, concretely relates to gas self-closing valve.
Background
The gas becomes the indispensable reliance in people's life, can people know not comprehensively to the safe gas that uses, even does not have the consciousness of safety precaution to the use of gas to cause unnecessary loss and accident. At present, in order to ensure gas supply, a natural gas company generally increases gas supply pressure, and a gas self-closing valve is characterized in that the gas self-closing valve is automatically closed when the pressure exceeds a set pressure. The urban gas pressure regulating equipment is easy to generate the phenomenon of high-pressure supply of pipeline gas due to different environments, a gas source must be cut off firstly in the process of emergency repair, if a user does not timely or forget to close a valve of a gas appliance and a valve in front of a stove, explosion accidents caused by artificial gas leakage can be caused when gas is supplied again, and the safety of surrounding personnel and society can be endangered.
The currently used gas self-closing valves are various, and have the functions of direct overflowing differential pressure closing, induction pressure closing and the like. Technically, the safety problem of a part of gas pipelines can be solved, but the safety problem is incomplete and single, and only can be acted within a pressure value range set by a factory when the factory leaves a factory, and the purpose of automatically closing the gas pipelines is difficult to achieve when the pressure value exceeds or is lower than the set value; therefore, in the actual life, when the end of the hose with a higher outlet end of the gas self-closing valve of the pipeline is once dropped or broken and the pressure of the pipeline is higher than the use pressure range but not ultrahigh, the existing gas self-closing valve is in an unclosed state, so that personal injury, property loss and social insecurity are easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve foretell technical problem and provide a gas self-closing valve, further improve the stability of self-closing function of cutting off, effectively guarantee the security of using.
In order to solve the technical problem, the utility model adopts the technical scheme that: a gas self-closing valve comprises a left valve body and a right valve body, wherein an under-pressure cut-off device is arranged on the left valve body, a manual opening and closing device is arranged on the right valve body, an over-flow cut-off device is arranged between the left valve body and the right valve body, a first air inlet channel and a second air inlet channel which are communicated are arranged in the left valve body, a valve cover for fixedly installing the under-pressure cut-off device is arranged on the left valve body, the under-pressure cut-off device comprises a diaphragm, a pull rod, an iron washer, a magnet ring and a lifting button, the diaphragm is fixedly pressed on the left valve body by the valve cover, the lifting button is sleeved on the valve cover, the iron washer is fixed in the valve cover, the magnet ring is fixed in the pull rod, the pull rod penetrates through one end of the iron washer and; the super-flow device comprises a cutting ejector rod, a mounting seat, a fixed seat and a spring, wherein the mounting seat is fixed in the air inlet channel II by the fixed seat, the spring is sleeved on the cutting ejector rod, the cutting ejector rod is positioned and mounted on the mounting seat and can compress the spring to move to form sealing abutment with the fixed seat, so that the air inlet channel II can be opened and closed; and a manual opening and closing device is arranged in the right valve body.
The manual opening and closing device comprises a valve ball, a valve rod and a handle, the valve ball is arranged in the right valve body, one end of the valve rod is connected with the valve ball, and the other end of the valve rod is fixedly connected with the handle; the handle is twisted to drive the valve ball to rotate through the valve rod.
The diaphragm up end is provided with the spread groove, and the pull rod lower extreme is provided with the connection boss that the spread groove matches.
And the valve cover fixes the outer circumferential edge of the diaphragm in the fixing groove.
The pull rod is provided with a magnet fixing step, and the lower end face of the magnet ring is abutted against the magnet fixing step.
The pull rod is provided with a flow moving and positioning step, and the lower end face of the iron washer can be abutted against the flow moving and positioning step.
The valve cover is provided with a fixed step, and the iron washer is provided with a fixed groove corresponding to the fixed step.
The fixed step is positioned at the upper end of the iron washer.
Adopt above technical scheme, the utility model discloses following beneficial effect has:
compared with the prior art, the utility model is respectively provided with the under-pressure cut-off device and the over-flow cut-off device, when the flow is larger than the set value or the flow is unstable and suddenly increased, the cut-off ejector rod in the over-flow cut-off device is pressed, the end compression spring of the cut-off ejector rod and the fixed seat form a sealing support, thereby cutting off the air inlet channel II, and the flow needs to be restarted manually when being recovered to be normal, thereby preventing the potential safety hazard caused by the over-flow condition; when the flow is smaller than a set value, the attraction force between the magnet ring and the iron washer is larger than the gas flow pressure, the pull rod presses the diaphragm to fall and form sealing support with the air inlet channel I, so that the air inlet channel I is cut off, even if the flow returns to be normal, the flow pressure cannot overcome the attraction force between the magnet ring and the iron washer to jack the diaphragm, and manual restart is needed, so that the potential safety hazard caused by the fact that the pressure recovers under the condition of underpressure and unconscious condition is avoided; the utility model discloses have super flow, under-voltage dual safety function that cuts off, better assurance safe in utilization, avoid the emergence of gas incident.
The utility model discloses be provided with a flow mobile location step on the pull rod among the under-voltage cut-off device, set for the pull rod and move the location restriction upward, prevent that inlet channel one too big flow from getting into to inlet channel two in, the security of the super flow condition of further assurance.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
fig. 2 is an enlarged view of a portion a of fig. 1.
Detailed Description
The invention is further explained by combining the attached drawings.
Referring to fig. 1 and 2, the present invention provides a gas self-closing valve, which comprises a left valve body 1 and a right valve body 2, wherein the left valve body 1 is provided with an under-pressure cut-off device, the right valve body 2 is provided with a manual opening and closing device, an over-flow cut-off device is arranged between the left valve body 1 and the right valve body 2, the left valve body 1 is internally provided with a first air inlet channel 3 and a second air inlet channel 4 which are communicated, the left valve body 1 is provided with a valve cover 5 which fixedly installs the under-pressure cut-off device, the under-pressure cut-off device comprises a diaphragm 6, a pull rod 7, an iron washer 8, a magnet ring 9 and a lifting button 10, the diaphragm 6 is pressed and fixed on the left valve body 1 by the valve cover 5, the lifting button 10 is sleeved on the valve cover 5, the iron washer 8 is fixed in the valve cover 5, the magnet ring 9 is fixed on the pull rod 7, one end of the pull rod 7 penetrating through the iron washer 8 is connected with the diaphragm 6, the other end of the pull rod 7 is fixedly connected with the lifting button 10 through a nut, and the pull rod 7 can move up and down through the diaphragm 6 to open and close the air inlet channel I3; the super-flow device comprises a cutting ejector rod 11, a mounting seat 12, a fixed seat 13 and a spring 14, wherein the mounting seat 12 is fixed in the air inlet channel II 4 by the fixed seat 13, the spring 14 is sleeved on the cutting ejector rod 11, the cutting ejector rod 11 is positioned and mounted on the mounting seat 12 and can compress the spring 14 to move and form sealing abutting with the fixed seat 13, and therefore the air inlet channel II 4 can be opened and closed; a manual opening and closing device 15 is arranged in the right valve body 2.
Specifically, the manual opening and closing device 15 comprises a valve ball 16, a valve rod 17 and a handle 18, the valve ball 16 is arranged in the right valve body 2, one end of the valve rod 17 is connected with the valve ball 16, and the other end of the valve rod 17 is fixedly connected with the handle 18; the twist handle 18 drives the valve ball 16 to rotate through the valve rod 17, so that after the over-flow is cut off, the cut-off ejector rod 11 can be reset in a jacking-contact movement mode by rotating the valve ball 16.
Specifically, the upper end surface of the diaphragm 6 is provided with a connecting groove 19, and the lower end of the pull rod 7 is provided with a connecting boss 20 matched with the connecting groove 19; thereby realizing the connection between the membrane 6 and the pull rod 7 and enabling the pull rod and the membrane to move up and down synchronously.
Specifically, the left valve body 1 is provided with a fixing groove 21, and the valve cover 5 fixes the outer circumferential edge of the diaphragm 6 in the fixing groove 21, thereby fixing the diaphragm.
Specifically, the pull rod 7 is provided with a magnet fixing step 22, and the lower end surface of the magnet ring 9 abuts against the magnet fixing step 22; the magnet ring 9 is fixedly connected with the pull rod 7, and the situation that the magnet ring moves downwards relative to the pull rod and falls off due to the suction force between the magnet ring 9 and the iron washer 8 is prevented.
Specifically, the pull rod 7 is provided with a flow moving positioning step 23, and the lower end surface of the iron washer 8 can be abutted against the flow moving positioning step 23; the flow moving and positioning step 23 limits the maximum limit of upward movement of the pull rod 7, and even if the flow in the air inlet channel I3 is large, the diaphragm 6 has an upper limit position, so that the size of a vent between the air inlet channel I3 and the air inlet channel II 4 is limited, the passing speed when the flow is overlarge is limited, and the use safety is further improved.
Specifically, the valve cover 5 is provided with a fixing step 24, and the iron washer 8 is provided with a fixing groove 25 corresponding to the fixing step 24, so that the iron washer 8 and the valve cover 5 form a fixed connection, and further, the fixing step 24 is located at the upper end of the iron washer 8, so as to prevent the iron washer 8 from being knocked off by the upward force of the pull rod 7 when the flow in the air inlet passage one 3 is too large.
When the over-flow occurs, the cutting ejector rod 11 in the over-flow cutting device compresses the spring 14 under the flow pressure in the air inlet channel II 4 and forms end sealing abutment with the fixed seat 13, so that cutting is performed; after the flow pressure returns to normal, the over-flow cut-off device is still in a cut-off state, at the moment, the valve ball 16 is driven to rotate by screwing the handle 18 in the manual opening and closing device, the cut-off mandril 11 is pushed back by the rotation of the valve ball 16 and is reset under the elastic force action of the spring 14, and therefore normal use is restored; when other conditions are met during use and need to be checked, the valve can be closed through a manual opening and closing device.
Under the condition of under-pressure, the attraction force between the iron washer 8 and the magnet ring 9 is greater than the gas flow pressure, so that the pull rod 7 moves downwards, presses the diaphragm 6 to synchronously move downwards in the downward moving process, and finally the end part of the pull rod 7 presses the diaphragm 6 to seal and block the first air inlet channel 3, thereby cutting off; after the pressure returns to normal, the suction force between the iron washer 8 and the magnet ring 9 cannot be overcome during normal flow pressure, the pull rod 7 cannot move upwards to open the air inlet channel 3, at this time, the pull rod 7 is manually moved upwards through the lifting button 10 to enable a certain distance to be reserved between the iron washer 8 and the magnet ring 9, at this time, the suction force between the iron washer 8 and the magnet ring 9 is smaller than the pressure during normal flow, and therefore normal use is resumed.
The gas self-closing valve provided by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying a specific example, and the description of the above embodiment is only used to help understanding the technical solution disclosed by the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (8)
1. A gas self-closing valve is characterized in that: the valve comprises a left valve body and a right valve body, wherein an under-pressure cut-off device is arranged on the left valve body, a manual opening and closing device is arranged on the right valve body, an over-flow cut-off device is arranged between the left valve body and the right valve body, a first air inlet channel and a second air inlet channel which are communicated are arranged in the left valve body, a valve cover for fixedly installing the under-pressure cut-off device is arranged on the left valve body, the under-pressure cut-off device comprises a diaphragm, a pull rod, an iron washer, a magnet ring and a lifting button, the diaphragm is fixedly pressed on the left valve body by the valve cover, the lifting button is sleeved on the valve cover, the iron washer is fixed in the valve cover, the magnet ring is fixed on the pull rod, one end of the pull rod, which penetrates through; the super-flow device comprises a cutting ejector rod, a mounting seat, a fixed seat and a spring, wherein the mounting seat is fixed in the air inlet channel II by the fixed seat, the spring is sleeved on the cutting ejector rod, the cutting ejector rod is positioned and mounted on the mounting seat and can compress the spring to move to form sealing abutment with the fixed seat, so that the air inlet channel II can be opened and closed; and a manual opening and closing device is arranged in the right valve body.
2. A gas self-closing valve according to claim 1, wherein: the manual opening and closing device comprises a valve ball, a valve rod and a handle, the valve ball is arranged in the right valve body, one end of the valve rod is connected with the valve ball, and the other end of the valve rod is fixedly connected with the handle; the handle is twisted to drive the valve ball to rotate through the valve rod.
3. A gas self-closing valve according to claim 1, wherein: the diaphragm up end is provided with the spread groove, and the pull rod lower extreme is provided with the connection boss that the spread groove matches.
4. A gas self-closing valve according to claim 1, wherein: and the valve cover fixes the outer circumferential edge of the diaphragm in the fixing groove.
5. A gas self-closing valve according to claim 1, wherein: the pull rod is provided with a magnet fixing step, and the lower end face of the magnet ring is abutted against the magnet fixing step.
6. A gas self-closing valve according to claim 5, wherein: the pull rod is provided with a flow moving and positioning step, and the lower end face of the iron washer can be abutted against the flow moving and positioning step.
7. A gas self-closing valve according to claim 1, wherein: the valve cover is provided with a fixed step, and the iron washer is provided with a fixed groove corresponding to the fixed step.
8. A gas self-closing valve according to claim 7, wherein: the fixed step is positioned at the upper end of the iron washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020815229.1U CN212536806U (en) | 2020-05-16 | 2020-05-16 | Gas self-closing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020815229.1U CN212536806U (en) | 2020-05-16 | 2020-05-16 | Gas self-closing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212536806U true CN212536806U (en) | 2021-02-12 |
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ID=74542874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020815229.1U Active CN212536806U (en) | 2020-05-16 | 2020-05-16 | Gas self-closing valve |
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| Country | Link |
|---|---|
| CN (1) | CN212536806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115978256A (en) * | 2022-12-24 | 2023-04-18 | 浙江永德信科技有限公司 | Gas flow-through closed valve |
-
2020
- 2020-05-16 CN CN202020815229.1U patent/CN212536806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115978256A (en) * | 2022-12-24 | 2023-04-18 | 浙江永德信科技有限公司 | Gas flow-through closed valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A gas self closing valve Effective date of registration: 20211019 Granted publication date: 20210212 Pledgee: Agricultural Bank of China Limited by Share Ltd. Yuhuan branch Pledgor: ZHEJIANG YONGDEXIN TECHNOLOGY Co.,Ltd. Registration number: Y2021980010676 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |