Gas self-closing valve with detection mechanism

Abstract

The application relates to a gas self-closing valve with a detection mechanism and belongs to the field of gas self-closing valves. The gas self-closing valve comprises a main valve body, a ball valve starting assembly arranged on one side of the main valve body, an air inlet pipe communicated with the main valve body and the ball valve starting assembly and arranged transversely, and a detection valve sleeve arranged between the main valve body and the ball valve starting assembly. The detection valve sleeve is provided with a detection mechanism for detecting gas pressure in cooperation with a detection device. The detection valve sleeve is further provided with a sealing plug for covering the detection mechanism. The side of the sealing plug away from the detection mechanism is provided with an unlocking protrusion which is a special-shaped block. The unlocking protrusion is further provided with an unlocking piece for unlocking the sealing plug. The unlocking piece is provided with an unlocking groove matched with the unlocking protrusion. The application has the effect of reducing the probability of the detection mechanism being mistakenly touched during non-detection time.

Description

Technical Field

[0001] This application relates to the field of gas self-closing valves, and more particularly to a gas self-closing valve with a detection mechanism. Background Technology

[0002] A gas pipeline self-closing valve is a safety device installed on a low-pressure gas system pipeline. When the gas supply pressure in the pipeline is low, high, or there is a gas outage, it can automatically cut off the gas source without the need for electricity or other external power. The gas supply can only be restored by manual operation. It is an important device to ensure the safety of users' gas use.

[0003] In the practical application of self-closing valves for pipeline gas, detecting the gas pressure before and after the valve is an important means of judging the gas tightness of the pipeline and troubleshooting potential faults. To achieve the pressure detection function, existing gas pipeline systems usually require the installation of pressure testing ports or nozzles on the pipeline. However, the detection interfaces of existing self-closing valves are usually sealed with ordinary threaded plugs or elastic sealing caps, which are simple in structure and lack anti-accidental activation design. During daily use or maintenance, non-professionals can easily unscrew or pry open the plugs using common tools (such as screwdrivers, wrenches, or even fingernails), exposing the detection mechanism or even causing it to be accidentally triggered by pressure. Once the detection mechanism is accidentally activated outside of detection time, it may cause temporary opening of the detection channel, micro-gas leakage, or displacement of the detection valve core. In severe cases, it may cause the self-closing valve to lose its normal overflow shut-off function, posing a significant safety hazard to users.

[0004] In view of the above-mentioned related technologies, this application provides a gas self-closing valve with a detection structure. Utility Model Content

[0005] To reduce the probability of the detection mechanism being accidentally activated during non-detection periods, this application provides a gas self-closing valve with a detection mechanism.

[0006] The gas self-closing valve with a detection mechanism provided in this application adopts the following technical solution: A gas self-closing valve with a detection mechanism includes a main valve body, a ball valve actuation assembly arranged on one side of the main valve body, an inlet pipe communicating with the main valve body and the ball valve actuation assembly and arranged laterally, and a detection valve sleeve arranged between the main valve body and the ball valve actuation assembly. The detection valve sleeve is provided with a detection mechanism for detecting gas pressure in cooperation with a detection device. The detection valve sleeve is also provided with a sealing plug for covering the detection mechanism. The sealing plug has an unlocking protrusion on the side facing away from the detection mechanism, and the unlocking protrusion is an irregularly shaped block. It also includes an unlocking member for unlocking the sealing plug, and the unlocking member has an unlocking groove adapted to the unlocking protrusion.

[0007] By adopting the above technical solution, in the pressure detection process of the gas self-closing valve, the locking between the sealing plug and the detection valve sleeve is first unlocked by the cooperation between the unlocking part and the unlocking protrusion. Then, the gas pressure is detected by the cooperation between the detection device and the detection mechanism. The unlocking protrusion on the sealing plug is an irregularly shaped block, and only by using a special unlocking part can the sealing plug be opened, effectively reducing the probability of misoperation.

[0008] Optionally, the detection mechanism includes a detection valve seat installed on the detection valve sleeve and a detection component that cooperates with the detection device and is ellipsably installed on the detection valve seat. The detection valve seat has a detection channel for gas to pass through. The detection component is driven by the detection device to have a first position and a second position. When the detection component is in the first position, the detection channel is blocked. When the detection component is in the second position, the detection channel is unobstructed.

[0009] By adopting the above technical solution, the specific structure of the detection mechanism is disclosed. Through the cooperation between the detection device and the detection component, the detection component can switch between the first and second workstations. This allows the channel to be opened only when detection is needed, and to be automatically sealed when not in the detection state, reducing the probability of continuous gas leakage and ensuring the sealing and safety of daily use.

[0010] Optionally, the detection assembly includes a detection valve core that is lifted and mounted on the detection valve seat, a sealing valve port connected to the detection valve core near the air intake pipe, and a reset spring for driving the detection valve core to reset. One end of the reset spring abuts against the detection valve core and the other end abuts against the detection valve seat. The sealing valve port has a sealing groove and a first sealing ring that seals with the detection valve seat is provided in the sealing groove.

[0011] By adopting the above technical solution, the specific structure of the detection component is disclosed. The detection device drives the detection valve core to press down, causing the sealing valve port to disengage from the bottom surface of the detection valve seat, so that the detection channel is not blocked and the gas can pass through. When the detection device withdraws the downward force, the detection valve core can be reset under the drive of the return spring, so that the sealing valve port returns to the state of sealing cooperation with the detection valve seat, blocking the passage of gas. The setting of the first sealing ring enhances the sealing performance between the detection valve seat and the sealing valve port, reducing the probability of gas leakage.

[0012] Optionally, the detection valve core includes a guide section that is vertically arranged on the detection valve seat, a drive section connected to the guide section on the side away from the air intake pipe and cooperating with the detection device, and a fixed section connected to the other side of the guide section and cooperating with the sealing valve port. The detection valve core is provided with a limiting protrusion at the drive section to restrict the vertical movement of the detection valve core.

[0013] By adopting the above technical solution, the detection valve core is divided into a guide section, a drive section, and a fixed section. The limit protrusion ring set at the drive section helps to limit the lifting range of the detection valve core, reducing the probability of structural damage or sealing failure caused by excessive displacement of the detection valve core.

[0014] Optionally, the detection valve core has a spiral guide groove at the guide section.

[0015] By adopting the above technical solution, the opening of the spiral guide groove at the guide section of the detection valve core can guide the direction of gas flow, reduce flow resistance, make the gas flow more smoothly through the detection valve sleeve, and at the same time help stabilize the airflow and reduce pressure loss.

[0016] Optionally, the spiral guide groove is a semi-circular groove.

[0017] By adopting the above technical solution, the semi-circular design of the spiral guide channel makes it less prone to accumulating impurities, and the fluid resistance is small, which is conducive to the rapid passage of gas and also facilitates cleaning and maintenance.

[0018] Optionally, the detection valve sleeve has a mounting groove for arranging the detection mechanism and communicating with the air inlet pipe. The mounting groove includes a first groove, a second groove, and a third groove in sequence in the direction away from the air inlet pipe. The diameters of the first groove, the second groove, and the third groove gradually increase. A second sealing ring that seals with the detection device is provided at the third groove.

[0019] By adopting the above technical solution, the specific structure of the installation channel is disclosed. The first channel, the second channel and the third channel are set, and the diameter of the first channel, the second channel and the third channel gradually increases to form a stepped structure. The second sealing ring at the third channel can form a reliable seal when the detection device is inserted, reducing the probability of gas leakage during the detection process.

[0020] Optionally, the detection valve sleeve is further provided with a dustproof plug for covering the sealing plug. The dustproof plug is connected to the detection valve sleeve through a snap-fit ​​structure. The snap-fit ​​structure includes snap-fit ​​protrusions symmetrically arranged on the outer side wall of the dustproof plug, a first slot opened on the inner side wall of the detection valve sleeve for inserting the snap-fit ​​protrusions, and a second slot connected to the bottom of the first slot and arranged circumferentially.

[0021] By adopting the above technical solution, the dust cover can cover the sealing plug, forming a double protection and further ensuring the cleanliness of the testing facility. Furthermore, the snap-fit ​​structure allows for quick installation and removal of the dust cover. First, the snap-fit ​​protrusion is inserted into the first slot, then the dust cover is rotated to lock the protrusion into the second circumferential slot.

[0022] Optionally, the detection valve sleeve is integrally formed with the air intake pipe, and the connection between the detection valve sleeve and the air intake pipe has a rounded chamfer.

[0023] By adopting the above technical solution, the integral molding of the valve sleeve and intake pipe eliminates the connection gap between the two, reduces potential leakage points, and improves the overall structural strength and pressure resistance. The rounded chamfer at the connection between the valve seat and the intake pipe reduces gas flow resistance and makes gas flow smoother.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. A gas self-closing valve with a detection mechanism, wherein during the pressure detection process of the gas self-closing valve, the locking between the sealing plug and the detection valve sleeve is first unlocked by the cooperation between the unlocking part and the unlocking protrusion, and then the gas pressure is detected by the cooperation between the detection device and the detection mechanism. The unlocking protrusion on the sealing plug is an irregularly shaped block, and the sealing plug can only be opened by using a special unlocking part, which effectively reduces the probability of misoperation. 2. By opening the spiral guide groove at the guide section of the detection valve core, the flow direction of the gas can be guided, the flow resistance can be reduced, and the gas can pass through the detection valve sleeve more smoothly. At the same time, it helps to stabilize the airflow and reduce pressure loss. 3. By integrating the valve sleeve with the intake pipe, gaps between them are eliminated, potential leakage points are reduced, and the overall structural strength and pressure resistance are improved. The rounded chamfer at the connection between the valve seat and the intake pipe reduces gas flow resistance and makes gas flow smoother. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a gas self-closing valve with a detection mechanism in an embodiment of this application.

[0026] Figure 2 This is a cross-sectional structural diagram of a gas self-closing valve with a detection mechanism in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the structure of the sealing plug and the unlocking component in the embodiment of this application.

[0028] Figure 4This is a schematic diagram of the structure of the testing mechanism in the embodiments of this application.

[0029] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0030] Explanation of reference numerals in the attached drawings: 1. Main valve body; 2. Ball valve starting assembly; 3. Air inlet pipe; 4. Detection valve sleeve; 41. Mounting through groove; 411. First groove; 4111. First groove section; 4112. Second groove section; 4113. Variable diameter groove section; 412. Second groove; 413. Third groove; 42. Second sealing ring; 43. First retaining groove; 44. Second retaining groove; 5. Detection mechanism; 51. Detection valve seat; 511. Detection channel; 52. Detection... Components: 521, Detection valve core; 5211, Guide section; 52111, Abutting protrusion; 52112, Spiral guide groove; 5212, Drive section; 52121, Limiting protrusion; 5213, Fixing section; 522, Sealing valve port; 5221, Sealing groove; 523, Return spring; 524, First sealing ring; 6, Sealing plug; 61, Unlocking protrusion; 7, Unlocking component; 71, Unlocking groove; 8, Dustproof plug; 81, Snap-fit ​​protrusion. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0032] This application discloses a gas self-closing valve with a detection mechanism. (Refer to...) Figure 1 and Figure 2 The gas self-closing valve with detection mechanism includes a main valve body 1, a ball valve actuation assembly 2 arranged on one side of the main valve body 1, an inlet pipe 3 connected to the main valve body 1 and the ball valve actuation assembly 2 and arranged laterally, and a detection valve sleeve 4 arranged between the main valve body 1 and the ball valve actuation assembly 2. The detection valve sleeve 4 is integrally formed with the inlet pipe 3, and the connection between the detection valve sleeve 4 and the inlet pipe 3 has a rounded chamfer, allowing for a smooth flow transition when the gas enters the detection valve sleeve 4 from the inlet pipe 3, thus improving the stability of the detection device readings.

[0033] Reference Figure 2 and Figure 3The detection valve sleeve 4 is equipped with a detection mechanism 5 for detecting gas pressure in conjunction with a detection device. To reduce the probability of accidental activation of the detection mechanism 5 when not in a detection state, the detection valve sleeve 4 is also equipped with a sealing plug 6 for covering the detection mechanism 5 and threadedly engaging with the detection valve sleeve 4. The sealing plug 6 has an unlocking protrusion 61 on the side facing away from the detection mechanism 5. The unlocking protrusion 61 is an irregularly shaped block, and the side of the sealing plug facing the detection mechanism 5 has an inclined surface that slopes downward toward the central axis of the sealing plug 6. To unlock the lock between the sealing plug 6 and the detection valve sleeve 4, the gas self-closing valve with the detection mechanism also includes an unlocking component 7 for unlocking the lock engagement between the sealing plug 6 and the detection valve sleeve 4. The unlocking component 7 has an unlocking groove 71 that matches the unlocking protrusion 61. In this embodiment, the cross-section of the unlocking protrusion 61 is fan-shaped.

[0034] Reference Figure 2 The detection mechanism 5 includes a detection valve seat 51 installed within the detection valve sleeve 4 and a detection component 52 that cooperates with the detection device and is vertically mounted within the detection valve seat 51. The detection valve seat 51 has a detection channel 511 for gas to pass through. The detection component 52, driven by the detection device, has a first position and a second position. When the detection component 52 is in the first position, the detection channel 511 is blocked; when the detection component 52 is in the second position, the detection channel 511 is unobstructed, allowing gas to pass through. The detection component 52 includes a detection valve core 521 vertically mounted within the detection valve seat 51, a sealing valve port 522 connected to the detection valve core 521 near the intake pipe 3, and a return spring 523 for resetting the detection valve core 521. The sealing valve port 522 has a sealing groove 5221 on the side facing the detection valve core 521, and a first sealing ring 524 that seals with the detection valve seat 51 is provided within the sealing groove 5221.

[0035] Reference Figure 4 The detection valve core 521 includes a guide section 5211 that is vertically arranged on the detection valve seat 51, a drive section 5212 connected to the guide section 5211 on the side away from the intake pipe 3 and cooperating with the detection device, and a fixing section 5213 connected to the other side of the guide section 5211 and cooperating with the sealing valve port 522. The detection valve core 521 has an abutting protrusion 52111 at the guide section 5211. One end of the return spring 523 abuts against the top surface of the abutting protrusion 52111 of the detection valve core 521, and the other end abuts against the detection valve seat 51. To limit the vertical movement range of the detected valve, the detection valve core 521 has a limiting protrusion 52121 at the drive section 5212 that abuts against the top surface of the detection valve seat 51.

[0036] Reference Figure 4 and Figure 5In order to stabilize the airflow and improve the detection accuracy, the detection valve core 521 has a spiral guide groove 52112 at the guide section 5211, and the spiral guide groove 52112 is a semi-circular groove, thereby guiding the gas to flow along the spiral path, reducing local eddies and resistance losses, and making the gas flow more smoothly through the detection channel.

[0037] Reference Figure 2 and Figure 4 The detection valve sleeve 4 has a mounting groove 41 for accommodating the detection mechanism 5 and communicating with the air intake pipe 3. The mounting groove 41, moving away from the air intake pipe 3, includes a first groove 411, a second groove 412, and a third groove 413 in sequence. The diameters of the first groove 411, second groove 412, and third groove 413 gradually increase. To improve the sealing performance between the detection device and the detection mechanism 5, the detection valve sleeve 4 has a second sealing ring 42 at the third groove 413 that seals with the detection device. Furthermore, the bottom surface of the detection valve sleeve 4 at the third groove 413 has an inclined surface, which is inclined downwards towards the sliding axis of the detection valve core 521. This inclined surface guides the insertion of the detection device, making it easier to align and insert, and also facilitates the engagement with the inclined surface of the sealing plug 6, achieving a sealing effect. The first groove 411 includes a first groove section 4111 near the intake pipe 3, a second groove section 4112 for accommodating the detection valve seat 51, and a variable diameter groove section 4113 connecting the first groove section 4111 and the second groove section 4112. The aperture of the first groove section 4111 is smaller than that of the second groove section 4112, and the aperture of the variable diameter groove section 4113 gradually increases towards the second groove section 4112, which helps to optimize the flow characteristics of the combustion gas and improve the stability of the detection.

[0038] Reference Figure 2 The detection valve sleeve 4 is also provided with a dustproof cap 8 for covering the sealing plug 6, and the dustproof cap 8 is connected to the detection valve sleeve 4 through a snap-fit ​​structure. The snap-fit ​​structure includes snap-fit ​​protrusions 81 symmetrically arranged on the outer wall of the dustproof cap 8, a first slot 43 opened on the inner wall of the detection valve sleeve 4 for inserting the snap-fit ​​protrusions 81, and a second slot 44 connected to the bottom of the first slot 43 and arranged circumferentially. In this embodiment, there are two snap-fit ​​protrusions 81 on the outer wall of the dustproof cap 8, and the two snap-fit ​​protrusions 81 are symmetrically arranged.

[0039] The implementation principle of a gas self-closing valve with a detection mechanism in this application embodiment is as follows: During the pressure detection of the gas self-closing valve, firstly, the snap-fit ​​structure between the dust cover 8 and the detection valve sleeve 4 is unlocked. Then, the sealing plug 6 is unlocked by the unlocking part 7, which has an unlocking groove 71 adapted to the unlocking protrusion 61. Finally, the detection device is inserted into the detection channel and pressed down, thereby driving the detection valve core 521 to descend and simultaneously driving the sealing valve port 522 to disengage from the bottom surface of the detection valve seat 51, so that the gas can pass through the detection channel to realize the detection of the pressure value. When the detection device is pulled out, the detection valve core 521 will automatically reset under the drive of the return spring 523, realizing the sealing cooperation between the sealing valve port 522 and the detection valve seat 51, and sealing the detection channel. Through the cooperation between the unlocking protrusion 61 and the unlocking part 7 on the sealing plug 6, the probability of the detection mechanism 5 being accidentally touched in the non-detection state is effectively reduced.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas self-closing valve with a detection mechanism, characterized in that, The device includes a main valve body (1), a ball valve starting assembly (2) arranged on one side of the main valve body (1), an intake pipe (3) that communicates with the main valve body (1) and the ball valve starting assembly (2) and is arranged laterally, and a detection valve sleeve (4) arranged between the main valve body (1) and the ball valve starting assembly (2). The detection valve sleeve (4) is provided with a detection mechanism (5) for cooperating with a detection device to detect the gas pressure. The detection valve sleeve (4) is also provided with a sealing plug (6) for covering the detection mechanism (5). The sealing plug (6) has an unlocking protrusion (61) on the side facing away from the detection mechanism (5), and the unlocking protrusion (61) is an irregularly shaped block. The device also includes an unlocking member (7) for unlocking the sealing plug (6). The unlocking member (7) has an unlocking groove (71) that is adapted to the unlocking protrusion (61).

2. A gas self-closing valve with a detection mechanism according to claim 1, characterized in that, The detection mechanism (5) includes a detection valve seat (51) installed on the detection valve sleeve (4) and a detection component (52) that cooperates with the detection device and is installed vertically on the detection valve seat (51). The detection valve seat (51) has a detection channel (511) for gas to pass through. The detection component (52) is driven by the detection device to have a first position and a second position. When the detection component (52) is in the first position, the detection channel (511) is blocked. When the detection component (52) is in the second position, the detection channel (511) is unobstructed.

3. A gas self-closing valve with a detection mechanism according to claim 2, characterized in that, The detection assembly (52) includes a detection valve core (521) that is mounted on the detection valve seat (51) in a lifting manner, a sealing valve port (522) connected to the side of the detection valve core (521) near the air inlet pipe (3), and a reset spring (523) that drives the detection valve core (521) to reset. One end of the reset spring (523) abuts against the detection valve core (521) and the other end abuts against the detection valve seat (51). The sealing valve port (522) has a sealing groove (5221) and a first sealing ring (524) that seals against the detection valve seat (51) is provided in the sealing groove (5221).

4. A gas self-closing valve with a detection mechanism according to claim 3, characterized in that, The detection valve core (521) includes a guide section (5211) that is vertically arranged on the detection valve seat (51), a drive section (5212) connected to the side of the guide section (5211) away from the air inlet pipe (3) and cooperating with the detection device, and a fixed section (5213) connected to the other side of the guide section (5211) and cooperating with the sealing valve port (522). The detection valve core (521) is provided with a limiting protrusion ring (52121) at the drive section (5212) to limit the lifting and lowering of the detection valve core (521).

5. A gas self-closing valve with a detection mechanism according to claim 4, characterized in that, The detection valve core (521) has a spiral guide groove (52112) at the guide section (5211).

6. A gas self-closing valve with a detection mechanism according to claim 5, characterized in that, The spiral guide groove (52112) is a semi-circular groove.

7. A gas self-closing valve with a detection mechanism according to claim 1, characterized in that, The detection valve sleeve (4) has a mounting groove (41) for the placement of the detection mechanism (5) and for communication with the air inlet pipe (3). The mounting groove (41) includes a first groove (411), a second groove (412), and a third groove (413) in sequence in the direction away from the air inlet pipe (3). The diameters of the first groove (411), the second groove (412), and the third groove (413) gradually increase. A second sealing ring (42) is provided at the third groove (413) to seal with the detection device.

8. A gas self-closing valve with a detection mechanism according to claim 1, characterized in that, The detection valve sleeve (4) is also provided with a dustproof plug (8) for covering the sealing plug (6). The dustproof plug (8) and the detection valve sleeve (4) are connected by a snap-fit ​​structure. The snap-fit ​​structure includes snap-fit ​​protrusions (81) symmetrically arranged on the outer side wall of the dustproof plug (8), a first slot (43) opened on the inner side wall of the detection valve sleeve (4) for the snap-fit ​​protrusions (81) to be inserted, and a second slot (44) connected to the bottom of the first slot (43) and arranged circumferentially.

9. A gas self-closing valve with a detection mechanism according to claim 1, characterized in that, The detection valve sleeve (4) is integrally formed with the air intake pipe (3), and the connection between the detection valve sleeve (4) and the air intake pipe (3) has a rounded chamfer.

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