Mechanical double-trigger self-closing valve

Abstract

The invention relates to a mechanical double-trigger self-closing valve, and relates to the technical field of self-closing valves, the mechanical double-trigger self-closing valve comprises a valve body, an air inlet and an air outlet are formed in the valve body, a mounting frame is fixedly arranged in the air inlet, a flow hole is formed in the mounting frame in a penetrating mode, and a sliding rod is transversely arranged on the mounting frame in a sliding mode; a valve block and a fixed magnet are fixedly arranged on the sliding rod; a guide frame is fixedly arranged in the valve body, a movable block capable of sliding downwards is arranged on the guide frame, and a first attraction magnet and a first repulsion magnet are arranged on the movable block; a movable rod is vertically arranged on the top of the valve body in a sliding mode, and a leather film fixed to the movable rod is further arranged in the valve body. An adjusting groove is formed in the movable rod, a lifting magnet is arranged in the adjusting groove in a sliding mode, and the lifting magnet attracts the movable block. The self-closing valve has the effects that the reliability of the self-closing valve in the off state is improved, the misoperation risk is reduced, and the gas path can be directly cut off conveniently in the normal state of the internal pressure of the gas path.

Description

Technical Field

[0001] The present application relates to the technical field of self-closing valves, and in particular to a mechanical double-trigger self-closing valve. Background Art

[0002] In the field of fluid control, self-closing valves are widely used as safety devices in various pipeline systems, especially in the field of gas and hazardous gas and liquid transportation. With the improvement of industrial safety standards, the requirements for the response speed, reliability and multiple protection functions of self-closing valves are becoming increasingly stringent.

[0003] In the related art, the mainstream self-closing valves currently on the market mostly use a single pressure trigger mechanism to cut off the gas line when the gas line is over-pressured or under-pressured. However, the single pressure trigger mechanism is highly likely to be misoperated, which can easily lead to the gas line being accidentally opened due to misoperation under inappropriate circumstances, posing a risk. In addition, the single pressure trigger mechanism is difficult to cut off the gas line when the internal pressure of the gas line is normal. Usually, the gas line must be manually cut off first, and then the gas inside the self-closing valve is consumed, causing the self-closing valve to be in an under-pressure state. This gas consumption poses a risk, and the entire gas line cutting action is slow. Summary of the Invention

[0004] In order to improve the reliability of the disconnected state of the self-closing valve, reduce the risk of misoperation, and facilitate direct cutting off of the gas line when the internal pressure of the gas line is normal, the present application provides a mechanical double-trigger self-closing valve.

[0005] The present application provides a mechanical double-trigger self-closing valve that adopts the following technical solution: A mechanical double-triggered self-closing valve comprises a valve body, an air inlet and an air outlet are provided on the side wall of the valve body, a mounting bracket is fixedly provided in the air inlet, a flow hole is penetrated through the mounting bracket, a sliding rod is provided on the mounting bracket for transverse sliding, a valve block is fixedly provided at one end of the sliding rod facing the outside of the valve body, the valve block can abut against the mounting bracket and block the flow hole, a fixed magnet is fixedly provided at one end of the sliding rod facing the inside of the valve body; a guide bracket is fixedly provided in the valve body, a movable block that can slide downward is provided on the guide bracket, and a magnetic pole that attracts the fixed magnet is provided on the movable block. A first attracting magnet and a first repelling magnet that repels the magnetic pole of the fixed magnet, the first attracting magnet is located above the first repelling magnet, and the first repelling magnet is directly opposite to the fixed magnet; a moving rod is vertically slidably provided on the top of the valve body and passes through the inside and outside of the valve body, and a membrane is also provided inside the valve body, the outer side of the membrane is fixed to the side wall of the valve body, and the inner side of the membrane is fixed to the moving rod; an adjusting groove is provided in the moving rod, and a lifting magnet is vertically slidably provided in the adjusting groove, and the lifting magnet attracts the top of the movable block, and a linkage mechanism for driving the lifting magnet away from the movable block is provided in the adjusting groove.

[0006] By adopting the above technical solution, when the air circuit pressure is normal, the diaphragm is in a balanced state, the position of the movable rod is stable, and the lifting magnet relies on magnetic force to attract the movable block, so that the movable block remains in the lifted position. At this time, the first repelling magnet is directly opposite to the fixed magnet. The repulsive force between the first repelling magnet and the fixed magnet causes the valve block on the slide rod to move away from the mounting frame, the flow hole is in a conductive state, and the air circuit normally transports fluid. When the air circuit pressure is too high, the diaphragm expands and deforms outward under the action of pressure, driving the movable rod to slide upward, while the movable block cannot move upward. The upward movement of the movable rod weakens the magnetic force between the lifting magnet and the movable block to a level that is insufficient to attract the movable block. The movable block loses its upward traction and slides downward. The first attracting magnet is directly opposite to the fixed magnet. The attraction between the first attracting magnet and the fixed magnet pulls the slide rod, causing the valve block to slide toward the mounting frame until the valve block and the mounting frame are against each other, blocking the flow hole, achieving automatic shut-off of the air circuit, and preventing safety hazards caused by overpressure. When the air circuit pressure is too low, the membrane also turns inward and drives the movable rod downward, causing the movable rod and the movable block to move downward together. Ultimately, the first attracting magnet can face the fixed magnet, and the valve block can block the flow hole to prevent safety hazards caused by undervoltage. Regardless of the state of the air circuit, it is only necessary to drive the lifting magnet upward through the linkage mechanism, thereby moving the lifting magnet away from the movable block and disconnecting the attraction to the movable block. At this time, no matter how the movable rod moves, the movable block will not move upward with the movable rod, and the air circuit is in a stable disconnected state. Improving the reliability of the self-closing valve's disconnected state effectively reduces the risk of misoperation of a single pressure trigger, making it easier to directly cut off the air circuit when the internal pressure of the air circuit is normal.

[0007] Preferably, a tension spring is provided between the bottom wall inside the valve body and the movable block, the bottom end of the tension spring is fixedly connected to the bottom wall inside the valve body, and the top end of the tension spring is fixedly connected to the movable block. The tension spring drives the movable block close to the bottom wall of the valve body, and the elastic force of the tension spring is less than the attraction of the lifting magnet on the movable block.

[0008] By adopting this technical solution, when the self-closing valve is operating normally and the air path pressure is normal, the attraction of the lifting magnet on the movable block is greater than the elastic force of the tension spring, stably attracting and lifting the movable block, maintaining the air path's conduction state. When the air path is overpressured or the linkage mechanism is activated, the magnetic force between the lifting magnet and the movable block weakens, and the tension spring pulls the movable block downward, ensuring that the movable block can quickly respond to pressure changes and quickly shut off the air path, thereby enhancing the timeliness and stability of the self-closing valve's operation.

[0009] Preferably, a group of guide grooves are symmetrically and vertically provided on the side walls of the adjustment groove, and a group of guide rods are symmetrically provided on the side walls of the lifting magnet. The guide rods correspond to the guide grooves one by one, one end of the guide rod is fixedly connected to the lifting magnet, and the other end of the guide rod extends into the guide groove and slides with the guide groove.

[0010] By adopting the above technical solution, the cooperation between the guide rod and the guide groove provides a guide for the vertical sliding of the lifting magnet in the adjustment groove, ensuring that the lifting magnet will not deviate or shake during the up and down movement.

[0011] Preferably, the linkage mechanism includes a knob and a rotating drum, the axis of the rotating drum is vertical, the rotating drum is rotatably arranged in an adjustment groove, and a group of rising grooves are inclined and symmetrically opened on the peripheral wall of the rotating drum. The rising grooves pass through the inner and outer side walls of the rotating drum and correspond one-to-one to the guide rods. The guide rods can slide in the rising grooves, the knob rotates on the top of the moving rod, and the knob is coaxially fixed to the rotating drum.

[0012] By adopting the above technical solution, when the knob is turned, the knob drives the rotating drum to rotate synchronously. Since the lifting groove is opened at an angle, during the rotation of the rotating drum, the guide rod located in the lifting groove will move along the inclined trajectory of the lifting groove, thereby driving the lifting magnet to slide vertically in the adjusting groove, thereby realizing the function of manually controlling the air path cut-off, increasing the flexibility of the self-closing valve operation, and manually cutting off the air path when the internal pressure of the air path is normal, making up for the shortcomings of the single pressure trigger mechanism.

[0013] Preferably, an upper stop groove and a lower stop groove are provided on the peripheral wall of the rotating drum, and the planes in which the upper stop groove and the lower stop groove are opened are perpendicular to the axis of the rotating drum. The upper stop groove is connected to the highest end of the rotation groove, and the lower stop groove is connected to the lowest end of the rotation groove. The guide rod is located in the lower stop groove and slides with the lower stop groove, and the guide rod can slide into the rotation groove and the upper stop groove.

[0014] By adopting the above technical solution, when the guide rod is located in the lower stop groove, the lifting magnet is at its lowest position, at which point the lifting magnet can attract the movable block. When the air path needs to be manually shut off, the knob is turned, and the guide rod enters the rise groove from the lower stop groove and moves upward along the rise groove, eventually reaching the upper stop groove. The lifting magnet also moves upward, weakening the magnetic force between the guide rod and the movable block. Under the action of the tension spring, the movable block moves downward, effectively shutting off the air path. The guide rod provides a stable support platform between the upper and lower stop grooves, preventing the guide rod from reacting its active driving force to the rise groove due to the influence of the lifting magnet, causing accidental rotation of the drum and knob.

[0015] Preferably, a magnetic conductive plate is fixedly provided at the bottom of the movable rod, the magnetic conductive plate closes the bottom of the adjustment slot, the lifting magnet abuts against the upper surface of the magnetic conductive plate, and the movable block abuts against the lower surface of the magnetic conductive plate.

[0016] By adopting the above technical solution, the magnetic conductive plate can enhance the magnetic force conduction effect between the moving rod, the lifting magnet and the movable block, making the magnetic force more stable and reliable.

[0017] Preferably, a prompt bin is provided on the top of the valve body, an observation port is opened through the top of the prompt bin, a first prompt strip is sliding laterally in the prompt bin, an overpressure mark, a conduction mark and an underpressure mark are distributed on the upper surface of the first prompt strip along the sliding direction, and the conduction mark is located directly below the observation port, and a first drive component is also provided on the valve body, the first drive component is used to drive the first prompt strip to slide according to the internal pressure of the valve body, when the internal pressure of the valve body is too high, the overpressure mark is located directly below the observation port, and when the internal pressure of the valve body is too low, the underpressure mark is located directly below the observation port.

[0018] By adopting the above technical solution, when the internal pressure of the valve body is normal, the first drive component causes the conduction mark to be located directly below the observation port, and the operator can visually see that the gas circuit is in a conduction state through the observation port. When the gas circuit pressure is too high, the first drive component drives the first prompt bar to slide under the action of pressure, so that the overpressure mark moves to directly below the observation port, prompting the operator that the gas circuit is currently in an overpressure state and that timely measures need to be taken. When the gas circuit pressure is too low, the first drive component drives the first prompt bar to slide, moving the underpressure mark to directly below the observation port, prompting the operator that the gas circuit is currently in an underpressure state. The visual prompt method improves the operator's perception efficiency of the gas circuit status, facilitates timely processing, and ensures the safe operation of the gas circuit.

[0019] Preferably, the first driving component includes a movable protrusion, a push rod, and a holding spring. The movable protrusion is integrally formed on the side wall of the movable rod. The movable protrusion is provided with an overpressure surface, a conduction surface, and an underpressure surface on the side away from the movable rod. The overpressure surface, the conduction surface, and the underpressure surface are arranged in sequence from bottom to top in the vertical direction, and the distances to the side wall of the movable rod decrease in sequence. The first prompt strip slides in the direction approaching or away from the movable rod. The overpressure mark is located on the side of the conduction mark close to the movable rod, and the underpressure mark is located on the side of the conduction mark away from the movable rod. The push rod is fixedly connected to the first prompt strip, the push rod is against the conduction surface, and the push rod can be against the overpressure surface and the underpressure surface. The holding spring is arranged in the prompt bin, and the holding spring drives the first prompt strip close to the movable protrusion.

[0020] By adopting the above technical solution, when the air circuit pressure is normal, the push rod abuts against the conduction surface, and under the action of the holding spring, the first prompt bar maintains its current position, and the conduction mark is located directly below the observation port. When the air circuit pressure is too high, the movable rod moves upward, and the movable protrusion rises accordingly, and the push rod slides to the overpressure surface, pushing the first prompt bar to slide away from the movable rod, so that the overpressure mark moves to directly below the observation port. When the air circuit pressure is too low, the movable rod moves downward, and under the action of the holding spring, the push rod abuts against the underpressure surface, and the first prompt bar slides toward the movable rod, moving the underpressure mark to directly below the observation port, thereby realizing the automatic driving of the first prompt bar to slide according to the change in air circuit pressure to display the air circuit status.

[0021] Preferably, a second prompt strip is provided in the prompt bin to slide in the direction approaching or away from the movable rod, the second prompt strip is located above the first prompt strip, the second prompt strip is located on the side of the movable rod below the observation port, an artificial disconnection mark is provided on the upper surface of the second prompt strip, and a second drive assembly is provided in the prompt bin, the second drive assembly is used to drive the second prompt strip to slide after turning the knob, so that the artificial disconnection mark is located directly below the observation port.

[0022] By adopting the above technical solution, when the operator turns the knob to manually cut off the gas circuit, the second drive component drives the second prompt bar to move until the manual disconnection mark moves to the bottom of the observation port. At this time, the manual disconnection mark blocks the first prompt bar below the observation port. At this time, the operator can intuitively know through the observation port that the gas circuit has been manually cut off, which is convenient for multiple operators to synchronize information when working together, and facilitates the recording and management of gas circuit operations.

[0023] Preferably, the second driving assembly includes a movable magnet, a second attracting magnet, and a second repelling magnet. The movable magnet is fixedly connected to the second prompt strip. The second attracting magnet and the second repelling magnet are both fixedly connected to the rotating drum. The second attracting magnet is located on the side of the rotating drum facing the movable magnet. The second attracting magnet and the magnetic pole of the movable magnet are attracted to each other. The second repelling magnet can rotate with the rotating drum toward the movable magnet, and the second repelling magnet and the magnetic pole of the movable magnet repel each other.

[0024] By adopting the above technical solution, when the knob is not turned, the second attracting magnet and the magnetic pole of the movable magnet are attracted to each other, and the magnetic force is used to pull the movable magnet, thereby driving the second prompt strip to slide in the direction close to the movable rod, and the second prompt strip is moved away from directly below the observation port; as the rotating drum continues to rotate, the second repelling magnet rotates toward the movable magnet, and since the magnetic poles of the second repelling magnet and the movable magnet repel each other, the repulsive force generated further pushes the movable magnet and the second prompt strip, so that the manual disconnection mark (541) is located directly below the observation port, thereby realizing an effective prompt of the manual disconnection state of the gas path.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By arranging the mounting frame, flow hole, sliding rod, valve block, fixed magnet, movable block, first attracting magnet, first repelling magnet, movable rod, membrane, adjusting groove, and lifting magnet, the reliability of the self-closing valve in the disconnected state is improved, the risk of misoperation is reduced, and the gas path can be directly cut off when the internal pressure of the gas path is normal; 2. By setting the guide groove, guide rod, knob, rotating drum, lifting groove, upper stop groove and lower stop groove, during the rotation of the rotating drum, the guide rod located in the lifting groove will move along the inclined track of the lifting groove, thereby driving the lifting magnet to slide vertically in the adjustment groove, thereby realizing the function of manually controlling the gas circuit cut-off and increasing the flexibility of the self-closing valve operation; 3. By setting an observation port, a first prompt strip, an overpressure mark, a conduction mark, an underpressure mark, a movable protrusion, a push rod, a tightening spring, a second prompt strip, an artificial disconnection mark (541), a movable magnet, a second attracting magnet, and a second repelling magnet, the operating status of the self-closing valve is directly prompted to the operator in a visual prompting manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a mechanical double-trigger self-closing valve provided in an embodiment of the present application.

[0027] Figure 2 It is a schematic cross-sectional structure diagram of a mechanical double-trigger self-closing valve provided in an embodiment of the present application.

[0028] Figure 3 yes Figure 2 Enlarged view of part A.

[0029] Figure 4 yes Figure 2 Magnified view of part B.

[0030] Figure 5 It is a structural diagram of the active block in the embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of the partial structure of the rotating drum in the embodiment of the present application.

[0032] Explanation of reference numerals: 1. valve body; 11. air inlet; 12. air outlet; 13. guide frame; 14. movable rod; 141. adjusting groove; 1411. guide groove; 142. magnetic plate; 15. membrane; 16. lifting magnet; 161. guide rod; 2. mounting frame; 21. flow hole; 22. slide rod; 221. valve block; 222. fixed magnet; 3. movable block; 31. first attracting magnet; 32. first repelling magnet; 33. tension spring; 4. linkage mechanism; 41. knob; 42. rotary drum; 421. lifting groove; 422. Upper stop groove; 423, lower stop groove; 5, prompt chamber; 51, observation port; 52, first prompt strip; 521, overpressure mark; 522, conduction mark; 523, underpressure mark; 53, first drive assembly; 531, movable protrusion; 5311, overpressure surface; 5312, conduction surface; 5313, underpressure surface; 532, push rod; 533, tightening spring; 54, second prompt strip; 541, manual disconnection mark; 55, second drive assembly; 551, movable magnet; 552, second attraction magnet; 553, second repulsion magnet. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] The embodiment of the present application discloses a mechanical double-trigger self-closing valve. Figure 1 The valve body 1 comprises a valve body 1, on the side wall of which an air inlet 11 and an air outlet 12 are transversely arranged to connect the inside and outside of the valve body 1. The air inlet 11 is located on one side of the valve body 1, and the air outlet 12 is located on the other side of the valve body 1.

[0035] Reference Figure 2 and Figure 3 A mounting bracket 2 is fixedly mounted within the air inlet 11. A flow hole 21 is formed transversely through the mounting bracket 2, allowing fluid to flow through the air inlet 11. A slide rod 22 is transversely and slidably mounted through the middle of the mounting bracket 2. A valve block 221 is fixedly mounted on the end of the slide rod 22 facing the outside of the valve body 1. The valve block 221 can abut against the mounting bracket 2 and block the flow hole 21. A fixed magnet 222 is fixedly mounted on the end of the slide rod 22 facing the inside of the valve body 1.

[0036] Reference Figure 3 and Figure 5A guide frame 13 is fixedly provided in the valve body 1, and a movable block 3 that can slide downward is provided on the guide frame 13. In this embodiment, sliding grooves are vertically opened on the two side walls of the movable block 3, and a sliding block is integrally formed on the top of the guide frame 13. The sliding block extends into and slides in the sliding groove, and abuts against the bottom of the sliding groove, limiting the movable block 3 to slide downward. A first attracting magnet 31 that is attracted to the magnetic pole of the fixed magnet 222 and a first repelling magnet 32 ​​that repels the magnetic pole of the fixed magnet 222 are embedded in the movable block 3. The first attracting magnet 31 is located above the first repelling magnet 32, and the first repelling magnet 32 ​​is directly opposite to the fixed magnet 222.

[0037] Reference Figure 2 and Figure 3 A movable rod 14 is vertically slidably provided at the top of the valve body 1 and penetrates the inside and outside of the valve body 1. A membrane 15 is also provided inside the valve body 1. The outer side of the membrane 15 is fixed to the side wall of the valve body 1, and the inner side of the membrane 15 is fixed to the movable rod 14. The air inlet 11 and the air outlet 12 are both located below the membrane 15. An adjustment groove 141 is provided in the movable rod 14. The adjustment groove 141 is cylindrical with a vertical axis. The top of the adjustment groove 141 penetrates the top of the movable rod 14. A lifting magnet 16 is vertically slidably provided in the adjustment groove 141. Specifically, a group of guide grooves 1411 are symmetrically and vertically provided on the side wall of the adjustment groove 141. A group of guide rods 161 are symmetrically provided on the side wall of the lifting magnet 16. The guide rods 161 correspond one to one with the guide grooves 1411. One end of the guide rod 161 is fixedly connected to the lifting magnet 16, and the other end of the guide rod 161 extends into the guide groove 1411 and slides in engagement with the guide groove 1411. An iron plate that is attracted by the lifting magnet 16 is embedded in the top of the movable block 3. A magnetic plate 142 is fixedly installed at the bottom of the movable rod 14. The magnetic plate 142 seals the bottom of the adjustment groove 141. The lifting magnet 16 abuts against the upper surface of the magnetic plate 142, and the movable block 3 abuts against the lower surface of the magnetic plate 142. The lifting magnet 16 transmits magnetic force through the magnetic plate 142 and attracts the top of the movable block 3. A linkage mechanism 4 is provided in the adjustment groove 141 for driving the lifting magnet 16 away from the movable block 3.

[0038] Reference Figure 3 and Figure 5 A tension spring 33 is disposed between the bottom wall of the valve body 1 and the movable block 3. The bottom end of the tension spring 33 is fixedly connected to the bottom wall of the valve body 1, and the top end of the tension spring 33 is fixedly connected to the movable block 3. The tension spring 33 forces the movable block 3 toward the bottom wall of the valve body 1. The elastic force of the tension spring 33 is less than the attractive force of the lifting magnet 16 on the movable block 3.

[0039] Reference Figure 3 and Figure 6The linkage mechanism 4 includes a knob 41 and a rotating drum 42. The axis of the rotating drum 42 is vertical, and the rotating drum 42 is rotatably arranged in the adjustment groove 141. A group of rising grooves 421 are obliquely and symmetrically opened on the peripheral wall of the rotating drum 42. The rising grooves 421 pass through the inner and outer side walls of the rotating drum 42 and correspond one-to-one with the guide rods 161. The guide rods 161 can slide in the rising grooves 421, and the knob 41 rotates on the top of the movable rod 14 and is coaxially fixed with the rotating drum 42. Specifically, an upper stop groove 422 and a lower stop groove 423 are also opened on the peripheral wall of the rotating drum 42. The planes where the upper stop grooves 422 and the lower stop grooves 423 are opened are both perpendicular to the axis of the rotating drum 42. The upper stop groove 422 is connected to the highest end of the rotation groove 421, and the lower stop groove 423 is connected to the lowest end of the rotation groove 421. The guide rod 161 is located in the lower stop groove 423 and slidably engages with the lower stop groove 423. The guide rod 161 can slide into the rotation groove 421 and the upper stop groove 422. In this embodiment, the upper stop groove 422 and the lower stop groove 423 connected to the same rotation groove 421 are 180 degrees apart in the circumferential direction.

[0040] When the air circuit needs to be manually shut off, the operator turns the knob 41, which drives the rotating drum 42 to rotate synchronously. During the rotation of the rotating drum 42, it enters the lifting groove 421 from the lower stop groove 423 and finally enters the upper stop groove 422. Since the lifting groove 421 is inclined, the guide rod 161 slides upward along the inclined trajectory of the lifting groove 421, driving the lifting magnet 16 to move vertically upward in the adjustment groove 141. The magnetic force between the lifting magnet 16 and the movable block 3 weakens, and the tension spring 33 pulls the movable block 3 downward, so that the first attracting magnet 31 is aligned with the fixed magnet 222. The attraction between the first attracting magnet 31 and the fixed magnet 222 pulls the slide rod 22, causing the valve block 221 to block the flow hole 21, thus achieving manual shutoff of the air circuit. At this time, no matter how the position of the movable rod 14 changes, it will not affect the movable block 3.

[0041] In order to facilitate the operator to intuitively know the working status of the self-closing valve when it is working normally, refer to Figure 4 A prompting compartment 5 is fixedly mounted on the top of the valve body 1. An observation port 51 is formed through the top of the prompting compartment 5. A first prompting strip 52 slides transversely within the prompting compartment 5. An overpressure mark 521, a continuity mark 522, and an underpressure mark 523 are arranged on the upper surface of the first prompting strip 52 along the sliding direction. In this embodiment, the overpressure mark 521 is in the shape of a plus sign, the continuity mark 522 is square, and the underpressure mark 523 is in the shape of a minus sign. The continuity mark 522 is located directly below the observation port 51. A first driving assembly 53 is also mounted on the valve body 1. The first driving assembly 53 is configured to drive the first prompting strip 52 to slide according to the internal pressure of the valve body 1. When the internal pressure of the valve body 1 is too high, the overpressure mark 521 is located directly below the observation port 51. When the internal pressure of the valve body 1 is too low, the underpressure mark 523 is located directly below the observation port 51.

[0042] Reference Figure 1 and Figure 4 Specifically, the first driving assembly 53 includes a movable protrusion 531, a support rod 532, and a tightening spring 533. The movable protrusion 531 is integrally formed on the side wall of the movable rod 14, and the movable protrusion 531 is provided with an overpressure surface 5311, a conduction surface 5312, and an underpressure surface 5313 parallel to the vertical plane on the side away from the movable rod 14. The overpressure surface 5311, the conduction surface 5312, and the underpressure surface 5313 are arranged in sequence from bottom to top in the vertical direction, and the distances to the side wall of the movable rod 14 decrease in sequence. The overpressure surface 5311 and the conduction surface 5312, and the conduction surface 5312 and the underpressure surface 5313 are connected by inclined transition surfaces. The first prompt strip 52 slides in the direction of approaching or moving away from the movable rod 14, the overpressure mark 521 is located on the side of the conduction mark 522 close to the movable rod 14, and the underpressure mark 523 is located on the side of the conduction mark 522 away from the movable rod 14. One end of the push rod 532 is fixedly connected to the first prompt strip 52. The other end of the push rod 532 extends through the side wall of the prompt compartment 5 and is rotatably mounted on a rotating wheel. The push rod 532 abuts against the conductive surface 5312 via the rotating wheel. The push rod 532 can also abut against the overpressure surface 5311 and the underpressure surface 5313 via the rotating wheel. A holding spring 533 is disposed within the prompt compartment 5. One end of the holding spring 533 is fixedly connected to the side wall of the prompt compartment 5 and the other end is fixedly connected to the first prompt strip 52. The holding spring 533 forces the first prompt strip 52 toward the movable protrusion 531.

[0043] Reference Figure 1 and Figure 4 When the air circuit pressure is normal, the position of the movable rod 14 is stable, the conductive surface 5312 of the movable protrusion 531 abuts the rotating wheel of the push rod 532, and the pressing spring 533 pushes the first prompt strip 52, so that the conductive mark 522 is directly below the observation port 51, indicating that the air circuit is normally conductive. When the air circuit is overpressured, the membrane 15 expands, driving the movable rod 14 upward. The movable protrusion 531 rises, and the rotating wheel of the push rod 532 slides to the overpressure surface 5311. The distance between the overpressure surface 5311 and the side wall of the movable rod 14 is increased, pushing the push rod 532, causing the first prompt strip 52 to slide away from the movable rod 14. The overpressure mark 521 moves to directly below the observation port 51, alerting the operator to the air circuit overpressure. When the air circuit is under-pressured, the membrane 15 shrinks and drives the movable rod 14 to move downward, the movable protrusion 531 drops, and the pressing spring 533 pushes the pressing rod 532 to slide to the under-pressure surface 5313. The distance from the under-pressure surface 5313 to the side wall of the movable rod 14 is smaller, and the first prompt bar 52 slides toward the direction close to the movable rod 14. The under-pressure mark 523 is located directly below the observation port 51, realizing a visual prompt of the pressure status in the self-closing valve, which is convenient for the operator to deal with abnormalities in time.

[0044] In order to record whether the self-closing valve is closed manually, refer to Figure 4A second prompt strip 54 is provided within the prompt compartment 5, slidingly moving toward or away from the movable rod 14. The second prompt strip 54 is located above the first prompt strip 52 and below the observation port 51, offset toward the side closest to the movable rod 14. A triangular-shaped manual disconnect mark 541 is provided on the upper surface of the second prompt strip 54. A second drive assembly 55 is provided within the prompt compartment 5. This second drive assembly 55 is configured to drive the second prompt strip 54 to slide upon turning the knob 41, positioning the manual disconnect mark 541 directly below the observation port 51. Specifically, the second drive assembly 55 comprises a movable magnet 551, a second attracting magnet 552, and a second repelling magnet 553. The movable magnet 551 is fixedly connected to the second prompt strip 54 via a connecting rod extending through the side wall of the prompt compartment. Both the second attracting magnet 552 and the second repelling magnet 553 are fixedly connected to the rotating drum 42. In this embodiment, the second attracting magnet 552 and the second repelling magnet 553 are two poles of the same magnet. The second attraction magnet 552 is located on the side of the rotating drum 42 facing the movable magnet 551, and the second attraction magnet 552 is attracted to the magnetic pole of the movable magnet 551. The second repulsion magnet 553 can rotate with the rotating drum 42 to face the movable magnet 551, and the second repulsion magnet 553 is repelled from the magnetic pole of the movable magnet 551.

[0045] Reference Figure 1 and Figure 4 When the self-closing valve is not manually closed, the second attracting magnet 552 and the movable magnet 551 are attracted to each other, and the magnetic force pulls the movable magnet 551, which in turn drives the second prompt strip 54 to slide toward the movable rod 14, and the second prompt strip 54 moves away from directly below the observation port 51. When the self-closing valve is manually closed, as the rotating drum 42 continues to rotate, the second repelling magnet 553 rotates toward the movable magnet 551. Since the magnetic poles of the second repelling magnet 553 and the movable magnet 551 repel each other, the repulsive force generated further pushes the movable magnet 551 and the second prompt strip 54, so that the manual disconnection mark 541 is located directly below the observation port 51 and blocks the first prompt strip 52 below the observation port 51. At this time, the operator can intuitively know through the observation port 51 that the air path has been manually disconnected, which is convenient for multiple operators to synchronize information when working together, and facilitates the recording and management of air path operations.

[0046] The implementation principle of a mechanical double-trigger self-closing valve in the embodiment of the present application is as follows: when the air circuit pressure is normal, the membrane 15 is in a balanced state, the movable rod 14 is in a stable position, and the lifting magnet 16 relies on magnetic force to attract the movable block 3, so that the movable block 3 remains in the lifted position. At this time, the first repelling magnet 32 ​​is directly opposite to the fixed magnet 222. The repulsive force between the first repelling magnet 32 ​​and the fixed magnet 222 causes the valve block 221 on the slide rod 22 to move away from the mounting frame 2, and the flow hole 21 is in a conductive state, and the air circuit normally transports fluid. At the same time, the conductive surface 5312 of the movable protrusion 531 abuts against the rotating wheel of the push rod 532, and the pressing spring 533 pushes the first prompt bar 52, so that the conductive mark 522 is located directly below the observation port 51, indicating that the air circuit is normally conductive.

[0047] When the air path pressure is too high, the membrane 15 expands and deforms outward under the pressure, causing the movable rod 14 to slide upward, while the movable block 3 cannot move upward. The upward movement of the movable rod 14 weakens the magnetic force between the lifting magnet 16 and the movable block 3 to a point where it is insufficient to attract the movable block 3. The movable block 3 loses its upward traction and slides downward. The first attracting magnet 31 faces the fixed magnet 222. The attraction between the first attracting magnet 31 and the fixed magnet 222 pulls the slide rod 22, causing the valve block 221 to slide toward the mounting frame 2 until the valve block 221 contacts the mounting frame 2, blocking the flow hole 21 and automatically shutting off the air path, preventing the safety hazard caused by overpressure. At the same time, the wheel of the stop rod 532 slides to the overpressure surface 5311. The distance between the overpressure surface 5311 and the side wall of the movable rod 14 is greater, pushing the stop rod 532 and causing the first prompt bar 52 to slide away from the movable rod 14. The overpressure mark 521 moves to directly below the observation port 51, alerting the operator to the air path overpressure.

[0048] When the air path pressure is too low, the membrane 15 also shifts inward, driving the movable rod 14 downward, forcing the movable rod 14 and the movable block 3 to move downward together. Ultimately, the first attracting magnet 31 is aligned with the fixed magnet 222, and the valve block 221 blocks the flow hole 21, preventing the safety hazard caused by underpressure. At the same time, the holding spring 533 pushes the holding rod 532 to slide to the underpressure surface 5313, shortening the distance between the underpressure surface 5313 and the side wall of the movable rod 14. The first prompt bar 52 slides toward the movable rod 14, and the underpressure mark 523 is located directly below the observation port 51.

[0049] When the knob 41 is turned, it causes the rotating drum 42 to rotate synchronously. During rotation, the rotating drum 42 passes from the lower stop groove 423 into the ascending groove 421 and ultimately into the upper stop groove 422. Due to the inclined orientation of the ascending groove 421, the guide rod 161 slides upward along the inclined trajectory of the ascending groove 421, driving the lifting magnet 16 vertically upward within the adjustment groove 141. The magnetic force between the lifting magnet 16 and the movable block 3 weakens, and the lifting magnet 16 is no longer able to provide sufficient suction force for the movable block 3. The tension spring 33 pulls the movable block 3 downward, manually disconnecting the air path. At this point, regardless of the position of the movable rod 14, the movable block 3 remains lifted. As the rotating drum 42 rotates, the second repelling magnet 553 rotates toward the movable magnet 551. Due to the repulsive force between the second repelling magnet 553 and the movable magnet 551, the repulsive force further pushes the movable magnet 551 and the second indicator strip 54, positioning the manual disconnection mark 541 directly below the observation port 51. At this time, the manual disconnection mark 541 blocks the first prompt strip 52 below the observation port 51. In this way, the reliability of the self-closing valve disconnection state is improved, the risk of single pressure triggering being misoperated is effectively reduced, and the gas line can be directly cut off when the internal pressure of the gas line is normal.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A mechanical double-trigger self-closing valve, comprising a valve body (1), wherein the side wall of the valve body (1) is provided with an air inlet (11) and an air outlet (12), characterized in that: A mounting frame (2) is fixedly provided in the air inlet (11), a flow hole (21) is provided through the mounting frame (2), a sliding rod (22) is provided on the mounting frame (2) for horizontal sliding, a valve block (221) is fixedly provided at one end of the sliding rod (22) facing the outside of the valve body (1), the valve block (221) can abut against the mounting frame (2) and block the flow hole (21), and a fixed magnet (222) is fixedly provided at one end of the sliding rod (22) facing the inside of the valve body (1); a guide frame (13) is fixedly provided in the valve body (1), a movable block (3) that can slide downward is provided on the guide frame (13), and a first attracting magnet (31) that attracts the magnetic pole of the fixed magnet (222) and a first repelling magnet (31) that repels the magnetic pole of the fixed magnet (222) are provided on the movable block (3). Iron (32), the first attracting magnet (31) is located above the first repelling magnet (32), and the first repelling magnet (32) is opposite to the fixed magnet (222); the top of the valve body (1) is vertically slidably provided with a movable rod (14) that penetrates inside and outside the valve body (1), and the valve body (1) is further provided with a membrane (15), the outer side of the membrane (15) is fixed to the inner side wall of the valve body (1), and the inner side of the membrane (15) is fixed to the movable rod (14); an adjusting groove (141) is provided in the movable rod (14), and a lifting magnet (16) is vertically slidably provided in the adjusting groove (141), and the lifting magnet (16) attracts the top of the movable block (3), and a linkage mechanism (4) for driving the lifting magnet (16) away from the movable block (3) is provided in the adjusting groove (141).

2. A mechanical double-trigger self-closing valve according to claim 1, characterized in that: A tension spring (33) is provided between the bottom wall inside the valve body (1) and the movable block (3), the bottom end of the tension spring (33) is fixedly connected to the bottom wall inside the valve body (1), and the top end of the tension spring (33) is fixedly connected to the movable block (3), and the tension spring (33) drives the movable block (3) close to the bottom wall of the valve body (1), and the elastic force of the tension spring (33) is smaller than the attraction of the lifting magnet (16) to the movable block (3).

3. A mechanical double-trigger self-closing valve according to claim 1, characterized in that: A group of guide grooves (1411) are symmetrically and vertically provided on the side wall of the adjustment groove (141), and a group of guide rods (161) are symmetrically provided on the side wall of the lifting magnet (16). The guide rods (161) correspond to the guide grooves (1411) one by one, one end of the guide rod (161) is fixedly connected to the lifting magnet (16), and the other end of the guide rod (161) extends into the guide groove (1411) and slides with the guide groove (1411).

4. A mechanical double-trigger self-closing valve according to claim 3, characterized in that: The linkage mechanism (4) comprises a knob (41) and a rotating drum (42). The axis of the rotating drum (42) is vertical. The rotating drum (42) is rotatably arranged in the adjusting groove (141). A group of rotating grooves (421) are inclined and symmetrically opened on the peripheral wall of the rotating drum (42). The rotating grooves (421) penetrate the inner and outer side walls of the rotating drum (42) and correspond one-to-one with the guide rods (161). The guide rods (161) can slide in the rotating grooves (421). The knob (41) rotates on the top of the movable rod (14). The knob (41) and the rotating drum (42) are coaxially fixed.

5. A mechanical double-trigger self-closing valve according to claim 4, characterized in that: An upper stop groove (422) and a lower stop groove (423) are further provided on the peripheral wall of the rotating drum (42). The planes on which the upper stop groove (422) and the lower stop groove (423) are provided are both perpendicular to the axis of the rotating drum (42). The upper stop groove (422) is communicated with the highest end of the rotating groove (421), and the lower stop groove (423) is communicated with the lowest end of the rotating groove (421). The guide rod (161) is located in the lower stop groove (423) and is slidably matched with the lower stop groove (423). The guide rod (161) can slide into the rotating groove (421) and the upper stop groove (422).

6. The mechanical double-trigger self-closing valve according to claim 1, characterized in that: A magnetic conductive plate (142) is fixedly provided at the bottom of the movable rod (14), and the magnetic conductive plate (142) closes the bottom of the adjustment groove (141). The lifting magnet (16) abuts against the upper surface of the magnetic conductive plate (142), and the movable block (3) abuts against the lower surface of the magnetic conductive plate (142).

7. The mechanical double-trigger self-closing valve according to claim 1, characterized in that: The valve body (1) is provided with a prompt chamber (5) on the top, and an observation port (51) is provided through the top of the prompt chamber (5). A first prompt strip (52) is provided in the prompt chamber (5) for sliding laterally. An overpressure mark (521), a conduction mark (522), and an underpressure mark (523) are distributed on the upper surface of the first prompt strip (52) along the sliding direction. The conduction mark (522) is located directly below the observation port (51). The valve body (1) is also provided with a first driving component (53). The first driving component (53) is used to drive the first prompt strip (52) to slide according to the internal pressure of the valve body (1). When the internal pressure of the valve body (1) is too high, the overpressure mark (521) is located directly below the observation port (51). When the internal pressure of the valve body (1) is too low, the underpressure mark (523) is located directly below the observation port (51).

8. The mechanical double-trigger self-closing valve according to claim 7, characterized in that: The first driving assembly (53) includes a movable protrusion (531), a push rod (532), and a push spring (533). The movable protrusion (531) is integrally formed on the side wall of the movable rod (14). The movable protrusion (531) is provided with an overpressure surface (5311), a conduction surface (5312), and an underpressure surface (5313) on the side away from the movable rod (14). The overpressure surface (5311), the conduction surface (5312), and the underpressure surface (5313) are arranged in sequence from bottom to top in the vertical direction, and the distances to the side wall of the movable rod (14) decrease in sequence. The first prompt strip (52) is moved along the side of the movable rod (14) when it is close to or away from the movable rod (14). ), the overpressure mark (521) is located on the side of the conduction mark (522) close to the movable rod (14), the underpressure mark (523) is located on the side of the conduction mark (522) away from the movable rod (14), the push rod (532) is fixedly connected to the first prompt strip (52), the push rod (532) is against the conduction surface (5312), the push rod (532) can be against the overpressure surface (5311) and the underpressure surface (5313), the pressing spring (533) is arranged in the prompt bin (5), and the pressing spring (533) drives the first prompt strip (52) close to the movable protrusion (531).

9. The mechanical double-trigger self-closing valve according to claim 8, characterized in that: A second prompt strip (54) is provided in the prompt bin (5) so as to slide in a direction close to or away from the movable rod (14). The second prompt strip (54) is located above the first prompt strip (52). The second prompt strip (54) is located below the observation port (51) on a side close to the movable rod (14). An artificial disconnection mark (541) is provided on the upper surface of the second prompt strip (54). A second driving assembly (55) is provided in the prompt bin (5). The second driving assembly (55) is used to drive the second prompt strip (54) to slide after the knob (41) is turned, so that the artificial disconnection mark (541) is located directly below the observation port (51).

10. A mechanical double-trigger self-closing valve according to claim 9, characterized in that: The second driving component (55) includes a movable magnet (551), a second attracting magnet (552), and a second repelling magnet (553). The movable magnet (551) is fixedly connected to the second prompt strip (54). The second attracting magnet (552) and the second repelling magnet (553) are both fixedly connected to the rotating drum (42). The second attracting magnet (552) is located on the side of the rotating drum (42) facing the movable magnet (551). The magnetic poles of the second attracting magnet (552) and the movable magnet (551) are attracted to each other. The second repelling magnet (553) can rotate with the rotating drum (42) to face the movable magnet (551). The magnetic poles of the second repelling magnet (553) and the movable magnet (551) repel each other.

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