Overflow cut-off liquefied petroleum gas angle valve
By designing an overcurrent shut-off liquefied petroleum gas angle valve, and utilizing a limiting iron core to block the exhaust gap under high pressure, the problem of excessive valve flow caused by liquefied petroleum gas leakage was solved, thus improving safety and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-03-10
AI Technical Summary
During the use of liquefied petroleum gas, excessive valve flow can lead to leakage and pose an explosion risk. Existing technologies are insufficient to efficiently shut off the gas supply and improve safety.
Design an overcurrent shut-off liquefied petroleum gas angle valve, comprising a main valve body, a venting valve seat, a limiting discharge iron core, and a magnetic drive assembly. The limiting discharge iron core blocks the exhaust gap under high pressure, and combined with a signal interaction module, it realizes automatic or manual control to block the leakage path.
It effectively prevents further leakage of liquefied petroleum gas, reduces the risk of deflagration and explosion, improves safety in use, and restores normal operating conditions after troubleshooting.
Smart Images
Figure CN223985057U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to liquefied petroleum gas supporting valve equipment technical field, especially in a kind of overcurrent cut-off liquefied petroleum gas angle valve. BACKGROUND
[0002] As a kind of commonly used fuel, liquefied petroleum gas enters people's life rapidly with its convenience, fast and clean advantages, and brings a lot of convenience to people.
[0003] However, in the use process, there is the problem that pipeline or pressure reducing valve falls off and causes liquefied gas to leak in large quantities, or pressure reducing valve causes liquefied gas to leak due to operation error during installation process, etc., at this time, the leaked liquefied gas is easily exploded if meeting open fire, spark, etc., causing personnel casualty and property loss.
[0004] Therefore, how to accurately and efficiently cut off gas circuit when liquefied petroleum gas leaks and causes excessive valve flow, to avoid further leakage of liquefied petroleum gas, so as to improve the safety of bottled liquefied petroleum gas use is an important technical problem to be solved by the person skilled in the art at present. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a kind of overcurrent cut-off liquefied petroleum gas angle valve, which can accurately and efficiently cut off gas circuit when liquefied petroleum gas leaks and causes excessive valve flow, to avoid further leakage of liquefied petroleum gas, so as to improve the safety of bottled liquefied petroleum gas use.
[0006] To solve the above technical problems, the utility model provides a kind of overcurrent cut-off liquefied petroleum gas angle valve, including the main valve body with main valve cavity in the inside, the bottom of the main valve body has the lower valve port communicated with the main valve cavity, the side of the main valve body has the side valve port communicated with the main valve cavity, the main valve cavity is provided with main valve core in on-off, the top of the main valve body is rotatably provided with hand wheel assembly connected with the main valve core in linkage;
[0007] The side of the main valve body is provided with air vent valve seat, the inside of the air vent valve seat has air vent valve cavity, the outer end of the air vent valve seat has air vent port communicated with the air vent valve cavity, the air vent valve cavity is communicated with the main valve cavity by the side valve port, the inner ring wall of the air vent valve seat is provided with sealing boss along its radial direction, the sealing boss is extended along the circumference of the air vent valve seat and connected head to tail, to form exhaust passage extending along the axial direction of the air vent valve seat on the inside of the sealing boss;
[0008] The vent valve cavity is provided with a limited exhaust core, the limited exhaust core includes a guide section and a gas blocking section arranged in sequence from outside to inside along the axial direction of the vent valve seat, the outer diameter of the gas blocking section is larger than the outer diameter of the guide section, the guide section is inserted into the exhaust passage in a position matched manner, the outer wall of the guide section is in a clearance fit with the inner wall of the exhaust passage, the gas blocking section can be in a clearance fit with the inner end of the sealing boss to form an exhaust gap for gas flow, the gas blocking section is provided with a gas blocking piece capable of abutting against the inner end of the sealing boss, and the gas blocking piece is linked with the limited exhaust core;
[0009] The outer part of the vent valve seat is provided with a magnetic induction driving assembly capable of driving the limited exhaust core to move reciprocally along the axial direction of the vent valve seat, and the outer part of the vent valve seat is further provided with a signal interaction module capable of being in communication connection with the magnetic induction driving assembly and an external controller.
[0010] Preferably, a limiting clamping table is protrusively arranged on the inner annular wall of the sealing boss, the outer peripheral part of the guide section is coaxially sleeved with a limiting spring, the outer end of the limiting spring abuts against the limiting clamping table, and the inner end of the limiting spring abuts against the gas blocking section.
[0011] Preferably, a limiting sleeve is further arranged on the inner annular wall of the sealing boss, and the guide section is coaxially and axially movably inserted into the limiting sleeve.
[0012] Preferably, a secondary valve body is arranged on the side part of the main valve body, the vent valve seat is located in the secondary valve body, and a nylon sealing ring is embedded between the outer wall of the vent valve seat and the inner wall of the secondary valve body.
[0013] Preferably, an inner step surface is arranged on the outer wall of the vent valve seat by bending, an outer step surface is arranged on the inner wall of the secondary valve body by bending, the inner step surface and the outer step surface are arranged in a position matched manner, and the nylon sealing ring is embedded in the matched gap between the inner step surface and the outer step surface.
[0014] Preferably, the vent valve seat and the secondary valve body are threadedly connected.
[0015] Preferably, a locking through hole is radially penetrated through the side part of the secondary valve body, the outer wall of the vent valve seat has a locking blind hole matched with the locking through hole in a position matched manner, a locking pin is inserted into the locking through hole in an interference fit, and the inner end of the locking pin is inserted into the locking blind hole in an interference fit.
[0016] Preferably, the magnetic induction driving assembly is located on the secondary valve body, and the magnetic induction driving assembly includes a coil shell coaxially sleeved with the peripheral part of the vent valve seat and an electromagnetic coil located in the coil shell.
[0017] Preferably, the signal interaction module is an electronic tag sensing module arranged on the outer wall of the coil shell, and the external controller is a computer or a mobile phone.
[0018] Preferably, the outer peripheral part of the gas blocking section has an annular clamping groove, and the gas blocking member is a sealing rubber ring embedded in the annular clamping groove.
[0019] In view of the above background, the over-flow cut-off liquefied petroleum gas angle valve provided by the utility model has the following advantages: in a normal gas use condition, the hand wheel assembly is used to control the opening of the main valve core, so that the side valve port, the main valve cavity and the lower valve port are mutually communicated, the liquefied petroleum gas in the liquefied petroleum gas cylinder is introduced into the main valve cavity through the lower valve port, and then is discharged from the main valve cavity through the side valve port; after the liquefied petroleum gas is discharged from the side valve port, the liquefied petroleum gas is sequentially conveyed to the air vent through the exhaust gap and the exhaust channel, and is finally discharged to the downstream gas use equipment through the air vent. When the liquefied petroleum gas leaks, the flow of the liquefied petroleum gas introduced into the main valve cavity from the liquefied petroleum gas cylinder suddenly increases, the thrust acting on the exhaust limiting iron core increases, and then the exhaust limiting iron core is pushed from the inside to the outside under the pressure of the high-pressure liquefied petroleum gas, until the gas blocking member abuts against the inner end of the sealing boss, so that the exhaust gap is blocked, at this time, the normal discharge path of the liquefied petroleum gas is cut off, and the liquefied petroleum gas cannot be discharged through the air vent, thereby effectively preventing further leakage of the liquefied petroleum gas, reducing the risk of explosion and explosion, improving the use safety of the bottled liquefied petroleum gas, and protecting the personal safety of the related users. After the liquefied petroleum gas leakage fault is eliminated through maintenance, the exhaust limiting iron core can be axially moved from the outside to the inside to reset by manual operation of the staff, so that the gas blocking member is reset together with the exhaust limiting iron core to be out of contact with the sealing boss, and then the exhaust gap is re-opened, so that the internal exhaust passage of the air vent cavity is re-connected, and the liquefied petroleum gas can still be sequentially discharged through the lower valve port, the main valve cavity, the side valve port, the exhaust gap, the exhaust channel and the air vent in the above sequence under the subsequent normal condition, so as to meet the working requirement of the downstream gas use equipment.
[0020] In another preferred scheme of the utility model, the inner ring wall of the sealing boss is provided with a limiting card table, the outer circumferential part of the guide section is coaxially sleeved with a limiting spring, the outer end part of the limiting spring is in abutment with the limiting card table, and the inner end part of the limiting spring is in abutment with the gas resistance section. Under normal working conditions, the limiting spring keeps natural stretching state, so as to maintain the cooperation gap between the gas resistance member and the sealing boss, and ensure the smooth conduction of the exhaust gap. When the gas flow increases and the gas pressure rises due to the leakage of liquefied petroleum gas and other conditions, the gas resistance section is impacted by the high pressure gas from the main valve cavity and overcomes the elastic stretching force of the limiting spring to move towards the direction close to the air inlet, until the gas resistance member is in abutment with the sealing boss to block the exhaust gap. When the leakage of liquefied petroleum gas is eliminated and the equipment can return to normal working conditions, the gas resistance section is no longer impacted by the high pressure gas from the main valve cavity, so that the limiting spring can be stretched again, and the elastic stretching reset force of the limiting spring drives the limiting exhaust iron core to move and reset synchronously, until the gas resistance member is separated from the sealing boss and the exhaust gap is re-conducted. Therefore, the limiting spring can not only relieve the structural impact between the gas resistance member and the sealing boss during the blocking process of the exhaust gap, but also improve the reset action efficiency of the limiting exhaust iron core and related cooperation members. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.
[0022] Figure 1 The assembly structure front view of the overcurrent cut-off liquefied petroleum gas angle valve under normal working conditions is provided in a specific embodiment of the utility model.
[0023] Figure 2 For Figure 1 The component structure front view of the limiting exhaust iron core under the exhaust gap blocking state when the liquefied petroleum gas leaks.
[0024] Among them:
[0025] 10-main valve body;101-main valve cavity;102-lower valve port;103-side valve port;104-main valve core;105-handwheel assembly;
[0026] 11-air vent valve seat;111-air vent valve cavity;112-air inlet;113-inner step surface;114-locking blind hole;
[0027] 12-Sealing boss; 121-Exhaust duct; 122-Limit sleeve; 123-Limit locking plate; 124-Limit spring;
[0028] 13-Limited exhaust core; 131-Guide section; 132-Air blocking section; 133-Exhaust gap; 134-Air blocking component;
[0029] 20-Subsidiary valve body; 201-Outer stepped surface; 202-Locking through hole;
[0030] 21-Nylon sealing ring;
[0031] 22-O-ring seal;
[0032] 23-Locking pin;
[0033] 24 - Electromagnetic coil; 241 - Coil housing;
[0034] 30 - Liquefied petroleum gas cylinder. Detailed Implementation
[0035] The core of this utility model is to provide an overcurrent shut-off liquefied petroleum gas angle valve. This overcurrent shut-off liquefied petroleum gas angle valve can accurately and efficiently shut off the gas path when liquefied petroleum gas leaks and causes excessive valve flow, thereby preventing further leakage of liquefied petroleum gas and improving the safety of bottled liquefied petroleum gas.
[0036] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0037] It should be noted in advance that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0038] Furthermore, in this invention, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features not being in direct contact but through another feature between them.
[0039] In addition, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "beneath" for the first feature and the second feature include the first feature being directly below or diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature. The terms "above," "below," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0040] Please refer to the reference. Figure 1 and Figure 2 .
[0041] In a specific embodiment, the liquefied petroleum gas angle valve provided by this utility model includes a main valve body 10 with a main valve cavity 101 inside. The bottom of the main valve body 10 has a lower valve port 102 communicating with the main valve cavity 101. The side of the main valve body 10 has a side valve port 103 communicating with the main valve cavity 101. A main valve core 104 is provided in the main valve cavity 101 for switching on and off. A handwheel assembly 105 that is rotatably connected to the main valve core 104 is provided on the top of the main valve body 10.
[0042] A vent valve seat 11 is provided on the side of the main valve body 10. The vent valve seat 11 has a vent valve cavity 111 inside. The outer end of the vent valve seat 11 has a vent port 112 that communicates with the vent valve cavity 111. The vent valve cavity 111 is connected to the main valve cavity 101 through a side valve port 103. A sealing boss 12 is provided on the inner ring wall of the vent valve seat 11 along its radial direction. The sealing boss 12 extends along the circumference of the vent valve seat 11 and is connected end to end to form an exhaust passage 121 extending axially along the vent valve seat 11 on the inner side of the sealing boss 12.
[0043] A limiting discharge core 13 is provided inside the vent valve cavity 111. The limiting discharge core 13 includes a guide section 131 and a blocking section 132 arranged sequentially from the outside to the inside along the axial direction of the vent valve seat 11. The outer diameter of the blocking section 132 is larger than the outer diameter of the guide section 131. The guide section 131 is inserted into the exhaust passage 121, and the outer wall of the guide section 131 is in clearance fit with the inner wall of the exhaust passage 121. The blocking section 132 can be in clearance fit with the inner end of the sealing boss 12 to form an exhaust gap 133 for airflow. An air blocking element 134 is provided on the blocking section 132 that can abut against the inner end of the sealing boss 12. The air blocking element 134 is linked with the limiting discharge core 13.
[0044] The vent valve seat 11 is provided with a magnetic drive component that can drive the discharge limiting iron core 13 to reciprocate along the axial direction of the vent valve seat 11. The vent valve seat 11 is also provided with a signal interaction module that can communicate with the magnetic drive component and the external controller.
[0045] During its operation, under normal gas usage conditions, the main valve core 104 is opened by using the handwheel assembly 105, so that the side valve port 103, the main valve chamber 101 and the lower valve port 102 are interconnected. The liquefied petroleum gas in the liquefied petroleum gas cylinder 30 enters the main valve chamber 101 through the lower valve port 102, and then exits the main valve chamber 101 through the side valve port 103. After the liquefied petroleum gas is discharged from the side valve port 103, it is transported to the vent 112 through the exhaust gap 133 and the exhaust passage 121 in sequence, and finally discharged to the downstream gas-using equipment through the vent 112.
[0046] When liquefied petroleum gas (LPG) leaks, the flow rate of LPG delivered from LPG cylinder 30 to the main valve chamber 101 suddenly increases. The thrust of the airflow on the limiting iron core increases, causing the limiting iron core 13 to be pushed from the inside out under the pressure of the high-pressure LPG until the gas-blocking element 134 abuts against the inner end of the sealing boss 12, thereby blocking the exhaust gap 133. At this time, the normal discharge path of LPG is cut off, and it will no longer be discharged through the vent 112, thus effectively preventing further leakage of LPG, reducing the corresponding risks of deflagration and explosion, improving the safety of bottled LPG use, and ensuring the personal safety of relevant users.
[0047] Correspondingly, the magnetic drive component is activated automatically or manually via an external controller after detecting a liquefied petroleum gas leak, causing the limiting iron core to move laterally from the inside out, thereby blocking the liquefied petroleum gas leak.
[0048] After the liquefied petroleum gas leak is eliminated through inspection and maintenance, the staff can manually reset the limiting iron core 13 by moving it axially from the outside to the inside. This causes the gas blocking element 134 to reset along with the limiting iron core 13 and disengage from the sealing boss 12, thereby reopening the exhaust gap 133. This allows the internal exhaust passage of the vent valve chamber 111 to be reopened, ensuring that under normal operating conditions, liquefied petroleum gas can still be smoothly discharged in the following sequence: lower valve port 102, main valve chamber 101, side valve port 103, exhaust gap 133, exhaust passage 121, and vent port 112, to meet the operating requirements of downstream gas-using equipment.
[0049] Of course, the reset control method and action form of the limited discharge core 13 can also be adjusted according to the actual working conditions of the valve. These can be flexibly judged and selected based on the actual working conditions in the industry.
[0050] It should be understood that in practical applications, the arrangement and operation of the handwheel assembly 105, the main valve body 10 and its associated valve chambers and valve ports can be understood by referring to the conventional component layout in the industry, and will not be elaborated further in this article.
[0051] Specifically, a limiting plate 123 protrudes from the inner ring wall of the sealing boss 12, and a limiting spring 124 is coaxially sleeved on the outer periphery of the guide section 131. The outer end of the limiting spring 124 abuts against the limiting plate 123, and the inner end of the limiting spring 124 abuts against the air-blocking section 132. Generally, the limiting plate 123 can also be correspondingly arranged inside the vent valve cavity 111 at a position that can be aligned and adapted with the outer end of the limiting spring 124.
[0052] Under normal operating conditions, the limiting spring 124 remains in a naturally extended state to maintain the fit clearance between the gas blocking element 134 and the sealing boss 12, ensuring smooth conduction of the exhaust gap 133. When the gas flow rate and gas pressure increase due to liquefied petroleum gas leakage or other situations, the gas blocking section 132 is impacted by the high-pressure gas from the main valve chamber 101 and overcomes the elastic extension force of the limiting spring 124 to move towards the vent 112 until the gas blocking element 134 abuts against the sealing boss 12, thus blocking the exhaust gap 133.
[0053] Once the liquefied petroleum gas leak is resolved and the equipment can return to normal operation, the gas blocking section 132 will no longer be impacted by high-pressure gas from the direction of the main valve chamber 101. As a result, the limit spring 124 can be extended again. When the operator manually operates to reset the exhaust core 13, the elastic extension and reset force of the limit spring 124 will drive the exhaust core 13 to move and reset synchronously until the gas blocking component 134 disengages from the sealing boss 12 and the exhaust gap 133 is reopened.
[0054] It can be seen that the limiting spring 124 can not only alleviate the structural impact between the air blocking component 134 and the sealing boss 12 during the blocking of the exhaust gap 133, but also improve the reset efficiency of the limiting iron core 13 and its related mating parts.
[0055] Of course, the reset of the limiting iron core 13 can also be achieved manually by the operator. This manual operation can be achieved by a linkage operating component integrated on the limiting iron core 13, or by other operating methods that can match the working conditions. In practical applications, the specific component structure and application conditions can be flexibly selected and adjusted. In principle, any method that can meet the specific application needs of the overcurrent cut-off liquefied petroleum gas angle valve is acceptable.
[0056] Furthermore, it should be noted that through the communication between the signal interaction module and the magnetic drive component, and in conjunction with the liquefied petroleum gas monitoring and alarm device arranged on the overcurrent cut-off liquefied petroleum gas angle valve or its upstream and downstream supporting pipelines and equipment, real-time monitoring of liquefied petroleum gas leakage is achieved. Based on the monitoring results, corresponding control signals are fed back to control the corresponding action of the magnetic drive component, thereby driving the exhaust limiting iron core 13 to move so that the gas blocking component 134 and the sealing boss 12 are aligned and abutted or disengaged, thereby achieving the blocking and conduction of the exhaust gap 133.
[0057] Accordingly, the device used to monitor for liquefied petroleum gas (LPG) leaks can be a sensor alarm device capable of monitoring LPG concentration, or a sensor alarm device capable of monitoring local LPG flow and pressure. In practical applications, the appropriate device can be flexibly selected and adjusted based on specific operating conditions and equipment layout. Generally, if a monitoring method targeting local LPG flow is used, the alarm parameter is typically set so that an alarm signal is issued when the instantaneous LPG flow rate at the corresponding pipeline or valve reaches 1.1 to 1.5 times the rated flow rate.
[0058] More specifically, a limiting sleeve 122 is also provided on the inner annular wall of the sealing boss 12, and the guide section 131 is axially movable and coaxially inserted into the limiting sleeve 122. The inner annular wall of the limiting sleeve 122 is circumferentially adapted to the outer peripheral wall of the guide section 131 to provide reliable circumferential limiting for the guide section 131, ensuring the tracking and movement accuracy of the guide section 131 during axial movement, and preventing the guide section 131 from becoming loose or misaligned during operation.
[0059] On the other hand, a secondary valve body 20 is provided on the side of the main valve body 10, and a vent valve seat 11 is located inside the secondary valve body 20. A nylon sealing ring 21 is embedded between the outer wall of the vent valve seat 11 and the inner wall of the secondary valve body 20. Arranging the vent valve seat 11 inside the secondary valve body 20 can further improve the component structure integration of the overcurrent shut-off liquefied petroleum gas angle valve. Combined with the nylon sealing ring 21, the structural sealing effect between the vent valve seat 11 and the secondary valve body 20 can be further optimized, preventing liquefied petroleum gas from leaking through the possible fitting gap between the outer wall of the vent valve seat 11 and the inner wall of the secondary valve body 20, thereby further improving the safety of the overcurrent shut-off liquefied petroleum gas angle valve.
[0060] Based on this, an inner stepped surface 113 is bent on the outer wall of the vent valve seat 11, and an outer stepped surface 201 is bent on the inner wall of the secondary valve body 20. The inner stepped surface 113 and the outer stepped surface 201 are aligned and fitted with a clearance, and the nylon sealing ring 21 is aligned and embedded in the fitting gap between the inner stepped surface 113 and the outer stepped surface 201. By utilizing the alignment and fit between the inner stepped surface 113 and the outer stepped surface 201, the nylon sealing ring 21 can be reliably engaged and limited to prevent the nylon sealing ring 21 from loosening or misaligning, thereby further ensuring a reliable seal between the vent valve seat 11 and the circumferential mating surfaces of the secondary valve body 20.
[0061] Correspondingly, an O-ring 22 or other sealing element can be installed between the outer wall of the vent valve seat 11 and the inner wall of the secondary valve body 20 to ensure structural sealing at different mating positions between the vent valve seat 11 and the secondary valve body 20 circumferential mating surfaces. This further optimizes the structural sealing effect between the vent valve seat 11 and the secondary valve body 20, making the overall airtightness of the overflow cut-off liquefied petroleum gas angle valve higher and its operation safer and more reliable.
[0062] Generally, the vent valve seat 11 and the auxiliary valve body 20 are connected by threads. Specifically, this can be achieved by aligning the external threads on the outer wall of the vent valve seat 11 with the internal threads on the inner wall of the auxiliary valve body 20. This type of threaded connection offers high assembly strength and convenient and efficient disassembly and assembly operations, effectively optimizing the efficiency of disassembly and assembly operations of the vent valve seat 11, the auxiliary valve body 20, and related supporting components, thus facilitating component inspection, maintenance, and replacement.
[0063] Furthermore, a locking through-hole 202 extends radially through the side of the secondary valve body 20. The outer wall of the vent valve seat 11 has a locking blind hole 114 that aligns with the locking through-hole 202. A locking pin 23 is inserted into the locking through-hole 202, with an interference fit. The inner end of the locking pin 23 is also inserted into the locking blind hole 114 with an interference fit. This locking pin 23 can moderately disrupt the threaded connection between the vent valve seat 11 and the secondary valve body 20, preventing loosening of the assembly structure or failure of the connection structure between the vent valve seat 11 and the secondary valve body 20. Simultaneously, the interference fit between the locking pin 23 and the locking through-hole 202 and the locking blind hole 114 effectively ensures the airtightness of the corresponding mating points of the locking pin 23, thereby further preventing liquefied petroleum gas leakage and improving the operational safety of the overcurrent shut-off liquefied petroleum gas angle valve.
[0064] In addition, the magnetic drive assembly is located on the secondary valve body 20, and includes a coil housing 241 coaxially sleeved on the outer periphery of the vent valve seat 11 and an electromagnetic coil 24 located inside the coil housing 241. The coil housing 241 provides structural protection and support for the electromagnetic coil 24, ensuring that the assembly position of the electromagnetic coil 24 remains constant, thereby improving the magnetic coupling effect between the electromagnetic coil 24 and the limiting iron core 13, and thus correspondingly improving the working performance and operating efficiency of the overcurrent cut-off liquefied petroleum gas angle valve.
[0065] In practical applications, the signal interaction module can be an electronic tag sensing module mounted on the outer wall of the coil housing 241, with an external controller such as a computer or mobile phone. This electronic tag sensing module can communicate with sensors or other compatible components at valve ports to detect or receive liquefied petroleum gas leaks. Of course, the communication methods between the electronic tag sensing module and devices such as computers, mobile phones, or corresponding sensors are relatively standard in the industry, and operators can flexibly choose and apply them according to actual working conditions; further details are omitted here.
[0066] Furthermore, the outer periphery of the gas-blocking section 132 has an annular groove, and the gas-blocking element 134 is a sealing ring embedded in the annular groove. Alternatively, the gas-blocking element 134 can be a spherical or annular arc surface structure integrated into the outer periphery of the gas-blocking section 132, forming a reliable circumferential annular contact with the sealing boss 12 to ensure complete blockage of the exhaust gap 133. In practical applications, operators can flexibly select and adjust the specific structural form and application type of the gas-blocking element 134 based on the specific component layout and operating conditions. In principle, any design that meets the actual application requirements of the overflow-cutting liquefied petroleum gas angle valve is acceptable.
[0067] In summary, the overcurrent shut-off liquefied petroleum gas angle valve provided in this utility model, during normal gas usage conditions, uses the handwheel assembly to control the main valve core to open, so that the side valve port, the main valve chamber, and the lower valve port are interconnected. The liquefied petroleum gas in the liquefied petroleum gas cylinder enters the main valve chamber through the lower valve port, and then exits the main valve chamber through the side valve port. After the liquefied petroleum gas is discharged from the side valve port, it is sequentially transported to the vent through the exhaust gap and the exhaust channel, and finally discharged to the downstream gas-using equipment through the vent. When liquefied petroleum gas (LPG) leaks, the flow rate of LPG delivered from the LPG cylinder to the main valve chamber suddenly increases. The thrust of the airflow on the limiting iron core increases, causing the limiting iron core to be pushed from the inside out under the pressure of the high-pressure LPG until the gas-blocking element abuts against the inner end of the sealing boss, thus blocking the exhaust gap. At this point, the normal discharge path of LPG is cut off, and it will no longer be discharged through the vent, thereby effectively preventing further leakage of LPG, reducing the corresponding risks of deflagration and explosion, improving the safety of bottled LPG use, and ensuring the personal safety of relevant users. After the liquefied petroleum gas leak is eliminated through inspection and maintenance, the staff can manually reset it by moving the limiting iron core axially from the outside to the inside. This causes the gas blocking component to reset along with the limiting iron core and disengage from the sealing boss, thereby reopening the exhaust gap. This allows the internal exhaust passage of the vent valve chamber to be reopened, ensuring that under normal operating conditions, liquefied petroleum gas can still be smoothly discharged in the following sequence: lower valve port, main valve chamber, side valve port, exhaust gap, exhaust passage, and vent, to meet the operating requirements of downstream gas-using equipment.
[0068] The above provides a detailed description of the liquefied petroleum gas angle valve for overcurrent shut-off provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. An over-flow shut-off liquefied petroleum gas angle valve characterized by, The main valve body has a main valve cavity inside, the bottom of the main valve body has a lower valve port communicating with the main valve cavity, the side of the main valve body has a side valve port communicating with the main valve cavity, and a main valve core is arranged in the main valve cavity. The side of the main valve body is provided with a vent valve seat, the vent valve seat has a vent valve cavity inside, the outer end of the vent valve seat has a vent port communicating with the vent valve cavity, the vent valve cavity communicates with the main valve cavity through the side valve port, the inner ring wall of the vent valve seat is provided with a sealing boss protruding radially along the vent valve seat, and the sealing boss extends along the circumference of the vent valve seat and is connected end to end to form an exhaust passage extending along the axial direction of the vent valve seat on the inner side of the sealing boss. A limited exhaust iron core is arranged in the vent valve cavity, the limited exhaust iron core includes a guide section and a gas blocking section arranged in sequence from outside to inside along the axial direction of the vent valve seat, the outer diameter of the gas blocking section is greater than that of the guide section, the guide section is inserted into the exhaust passage in a position matching manner, the outer wall of the guide section is in clearance fit with the inner wall of the exhaust passage, the gas blocking section can be in clearance fit with the inner end of the sealing boss to form an exhaust gap for gas flow, the gas blocking section is provided with a gas blocking piece capable of abutting against the inner end of the sealing boss, and the gas blocking piece is connected with the limited exhaust iron core. The outer part of the vent valve seat is provided with a magnetic induction driving assembly capable of driving the limited exhaust iron core to move reciprocally along the axial direction of the vent valve seat, and the outer part of the vent valve seat is also provided with a signal interaction module capable of being in communication connection with the magnetic induction driving assembly and an external controller.
2. The excess flow shut-off liquefied petroleum gas angle valve of claim 1 wherein, The inner ring wall of the sealing boss is provided with a limiting clamping table protruding therefrom, the outer circumferential part of the guide section is coaxially sleeved with a limiting spring, the outer end of the limiting spring abuts against the limiting clamping table, and the inner end of the limiting spring abuts against the gas blocking section.
3. The excess flow shut-off liquefied petroleum gas angle valve of claim 2, wherein, The inner ring wall of the sealing boss is also provided with a limiting sleeve, and the guide section is coaxially inserted into the limiting sleeve in an axially movable manner.
4. The excess flow shut-off liquefied petroleum gas angle valve of claim 1 wherein, The side of the main valve body is provided with a secondary valve body, the vent valve seat is located in the secondary valve body, and a nylon sealing ring is embedded between the outer wall of the vent valve seat and the inner wall of the secondary valve body.
5. The excess flow shut-off liquefied petroleum gas angle valve of claim 4 wherein, The outer wall of the vent valve seat is provided with an inner step surface bent thereon, the inner wall of the secondary valve body is provided with an outer step surface bent thereon, the inner step surface and the outer step surface are arranged in a position matching manner and in clearance fit, and the nylon sealing ring is embedded in the fit clearance between the inner step surface and the outer step surface in a position matching manner.
6. The excess flow shut-off liquefied petroleum gas angle valve of claim 4 wherein, The vent valve seat and the secondary valve body are connected in a threaded manner.
7. The excess flow shut-off liquefied petroleum gas angle valve of claim 6 wherein, The side of the secondary valve body is provided with a locking through hole penetrating in a radial direction thereof, the outer wall of the vent valve seat is provided with a locking blind hole matched with the locking through hole in a position matching manner, a locking pin is inserted into the locking through hole in an interference fit, and the inner end of the locking pin is inserted into the locking blind hole in an interference fit.
8. The excess flow shut-off liquefied petroleum gas angle valve of claim 4 wherein, The magnetic induction driving assembly is located on the auxiliary valve body, and comprises a coil shell coaxially sleeved on the outer circumferential part of the vent valve seat and an electromagnetic coil located in the coil shell.
9. The excess flow shut-off liquefied petroleum gas angle valve of claim 8 wherein, The signal interaction module is an electronic tag sensing module arranged on the outer wall of the coil shell, and the external controller is a computer or a mobile phone.
10. The excess flow shut-off liquefied petroleum gas angle valve of claim 1 wherein, The outer circumferential part of the air blocking section has an annular clamping groove, and the air blocking member is a sealing rubber ring embedded in the annular clamping groove.