High-temperature fusing gas ball valve, gas safety control system and mounting method

Abstract

The invention discloses a high-temperature fusing fuel gas ball valve, a fuel gas safety control system and an installation method, and relates to the technical field of fuel gas ball valves.The high-temperature fusing fuel gas ball valve comprises a valve body assembly provided with a gas inlet channel, a gas outlet channel and a valve cavity; the valve ball is arranged in the valve cavity; the high-temperature fusing mechanism is arranged at an inlet of the air inlet channel and comprises a fusing support, a fusing valve element and a fusing spring, the fusing valve element and the fusing support are fixed through low-temperature welding flux, the welding flux is melted during overtemperature, and the fusing spring pushes the fusing valve element to achieve hard sealing cut-off; the overflowing cut-off mechanism comprises an overflowing valve element, an overflowing support, a cut-off spring and a sealing gasket, and when the flow exceeds the limit, the overflowing valve element displaces to abut against the sealing gasket to achieve sealing; and the insulating valve cover assembly comprises a metal insert and a PE insulating layer wrapping the metal insert, and is used for electrically isolating the valve body from an external pipeline. According to the multi-safety gas ball valve, the defects of an existing gas valve in the aspects of high temperature, overcurrent and insulation protection are overcome, and the multi-safety gas ball valve is compact in structure, sensitive in triggering, reliable in sealing and lasting in insulation performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas ball valve, in particular to a high-temperature fuse gas ball valve, a gas safety control system and an installation method. BACKGROUND

[0002] In the technical field of gas ball valve, the existing technology has developed various valve designs with single safety function, such as ball valve structures that independently realize over-flow cut-off, high-temperature fuse or insulation protection, but these schemes generally have the defects of function isolation, structural redundancy and insufficient reliability. Specifically, the existing valve is difficult to cope with complex accident scenarios (such as over-flow and high-temperature combined failure caused by fire accompanied by pipe rupture), and multiple functions are usually realized by external modules, resulting in large valve size and high cost. At the same time, the traditional thermal sensitive element responds slowly, the sealing material is easy to fail at high temperature, and the valve cover insulation structure is also easy to be affected by aging or mechanical impact due to simple design, which reduces the overall safety performance. In addition, although some functional combinations are involved in the existing patent documents, the integration of high-temperature fuse, over-flow cut-off and insulation function has not been realized, especially in the hard sealing trigger mechanism of the fuse assembly, the built-in compact design of the over-flow valve core and the PE injection molding insulation process of the valve cover, there is obvious blank, which cannot meet the efficient, compact and reliable safety protection demand of gas system. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a high-temperature fuse gas ball valve, a gas safety control system and an installation method, which aims to solve the deficiencies of existing gas valves in high temperature, over-flow and insulation protection, and provide a compact, sensitive, reliable and durable multi-safety gas ball valve.

[0004] To solve the above problems, the technical scheme provided by the present application is as follows:

[0005] A high-temperature fuse gas ball valve, comprising

[0006] a valve body assembly provided with an inlet channel, an outlet channel and a valve cavity;

[0007] a valve ball arranged in the valve cavity for controlling the on-off of gas;

[0008] a high-temperature fuse mechanism arranged at the inlet of the inlet channel, comprising a fuse bracket, a fuse valve core and a fuse spring, the fuse valve core and the fuse bracket are fixed by low-temperature solder, and when the temperature is too high, the solder melts and the fuse spring pushes the fuse valve core to realize hard sealing cut-off;

[0009] an over-flow cut-off mechanism integrated in the valve ball, comprising an over-flow valve core, an over-flow bracket, a cut-off spring and a sealing gasket, when the flow exceeds the limit, the over-flow valve core is displaced to abut against the sealing gasket to realize sealing;

[0010] The insulating valve cover assembly comprises a metal insert and a PE insulating layer covering the outside of the metal insert, and is used for electrically isolating the valve body from the external pipeline.

[0011] The overall basic structure of the gas ball valve comprises five core parts, i.e., a valve body assembly, a valve ball, a high-temperature fuse mechanism, an overcurrent cut-off mechanism and an insulating valve cover assembly. The function of the claim is to establish an integrated framework of a triple safety mechanism, to realize the coordinated protection of high-temperature automatic cut-off, overcurrent automatic protection and electrical insulation through structural innovation, and to fundamentally solve the problems of single function and slow response of traditional gas valves.

[0012] As an option, the welding melting point of the high-temperature fuse mechanism is 100℃±5℃, the solder is a tin-based alloy, and a metal conical sealing structure is adopted between the fuse valve core and the valve body gas inlet channel.

[0013] The specific parameters and sealing forms of the high-temperature fuse mechanism are further limited, which is to ensure the accuracy and reliability of the high-temperature triggering mechanism. By specifying the welding melting point tolerance (±5℃) and the tin-based alloy solder material, the consistency of the high-temperature response is ensured; the hard sealing structure (metal conical sealing) avoids the risk of failure of the polymer sealing element at high temperature.

[0014] As an option, the overcurrent valve core of the overcurrent cut-off mechanism is provided with a guide shaft shoulder, the overcurrent support is provided with a corresponding guide hole, and the cut-off spring acts on the rear end of the overcurrent valve core to keep it open under normal flow.

[0015] By setting the matching structure of the guide shaft shoulder and the guide hole, the function is to ensure the stability of the movement of the overcurrent valve core during the action process, and to avoid the sealing failure or reset failure caused by deflection. At the same time, the position of the cut-off spring is specified to ensure the repeatability of the overcurrent protection.

[0016] As an option, the metal insert of the insulating valve cover assembly is made of brass, and the PE insulating layer is covered on the outside of the insert by injection molding process to form an integrated insulating structure.

[0017] The mechanical strength is ensured by the brass insert, and the permanent insulation protection is realized by the PE injection molding. This structure design takes into account the installation torque bearing demand and electrical safety performance.

[0018] As an option, the sealing gasket of the overcurrent cut-off mechanism is made of rubber or polytetrafluoroethylene, and the front end of the overcurrent valve core is provided with a mounting groove for fixing the sealing gasket.

[0019] The sealing performance is optimized for the overcurrent sealing scene. The rubber or polytetrafluoroethylene material provides an elastic sealing interface, which not only ensures the sealing reliability, but also reduces the action resistance of the valve core.

[0020] As an option, the high-temperature fuse mechanism is connected to the valve body assembly by screw threads, and a sealing ring is provided to prevent gas leakage.

[0021] The screw thread connection between the fuse holder and the valve body and the configuration of the sealing ring are clearly defined. The function is to achieve modular installation and auxiliary sealing, which facilitates maintenance and replacement while preventing gas leakage.

[0022] As an option, the valve ball is provided with a fluid passage, and the flow cutoff mechanism is arranged in the middle of the passage. The displacement direction of the flow valve core is parallel to the fluid flow direction.

[0023] The fluid dynamics characteristics are used to improve the response sensitivity. By arranging the flow valve core in the middle of the passage and parallel to the flow direction, the pressure sensing efficiency is optimized.

[0024] As an option, the insulating valve cover assembly is connected to the valve body assembly by screw threads, and an O-ring is used to achieve airtight sealing.

[0025] The sealing integrity of the overall structure is ensured. Screw threads provide mechanical strength, and O-rings compensate for the sealing gap caused by processing tolerances.

[0026] A gas safety control system includes a high-temperature fuse gas ball valve connected to a gas pipeline and a user terminal.

[0027] The safety control of the regulating valve, pipeline, and user terminal is coordinated.

[0028] A method for installing a gas ball valve includes a step-by-step assembly process of a high-temperature fuse mechanism, a flow cutoff mechanism, and an insulating valve cover assembly, and includes the following steps:

[0029] 1. First step: smoothly put the fuse valve core into the special welding tool;

[0030] Second step: put in the fuse spring;

[0031] Third step: align the fuse holder with the fuse valve core and smoothly rotate it into the welding tool;

[0032] Fourth step: use a constant temperature welding wire to firmly weld the fuse valve core and the fuse holder;

[0033] Fifth step: rotate the fuse assembly: fuse holder, fuse spring, and fuse valve core into the inlet end of the valve body assembly, which can instantly close the gas inlet source at an abnormally high temperature;

[0034] 2. First step: put the flow valve core on the cutoff spring;

[0035] Second step: put the flow valve core with the cutoff spring into the corresponding small hole of the flow holder;

[0036] Third step: press the sealing gasket into the flow valve core groove;

[0037] Fourth step: the assembled valve core assembly: overflow valve core, cut-off spring, overflow support, gasket into the valve ball;

[0038] Fifth step: the valve core assembly: overflow valve core, cut-off spring, overflow support, gasket into the valve body assembly, which can automatically close or adjust the valve when the inlet flow is abnormal;

[0039] 3. First step: the valve cover insert is connected with the outer tooth insert by PE insulation layer injection molding;

[0040] Second step: the insulated valve cover assembly: valve cover insert, PE insulation layer, outer tooth insert is screwed into the valve body assembly, and the user connects the gas connection pipe to realize the insulation effect.

[0041] Ensure the correct assembly of the triple safety mechanism during installation, avoid function failure caused by installation error. Ensure assembly accuracy and consistency: through clear step division and the use of special tooling, avoid manual assembly error, ensure that each functional module (such as the welding position of the fuse valve core and the support, the pre-tightening force of the overflow valve core and the cut-off spring, the injection thickness of the insulation layer) meets the design specification. This standardized process is particularly suitable for mass production, which can effectively maintain product quality stability.

[0042] Realize function cooperation and reliability: the step-by-step assembly process ensures that the spatial layout and motion interference between the safety mechanisms are effectively controlled. For example, the independent assembly of the fuse mechanism and the overflow mechanism is completed first, and then the overall integration is carried out, which avoids the mutual interference of functional components in the narrow valve body, thereby ensuring the hard sealing effect of high temperature fuse, the sensitive response of overflow cut-off and the integrity of insulation protection.

[0043] Improve production efficiency and maintainability: the complex assembly process is divided into logical and clear sub-steps, which reduces the operation difficulty, improves the production efficiency and product consistency. At the same time, the standardized assembly logic also provides clear guidance for subsequent maintenance and replacement. When a functional module needs to be repaired, technical personnel can refer to the method for modular replacement, which reduces maintenance cost.

[0044] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0045] The triple safety mechanism is independent and complementary to each other, which can cope with composite faults;

[0046] The built-in valve ball in the overflow assembly greatly reduces the volume, and the high temperature fuse hard seal has excellent high temperature resistance;

[0047] The PE injection molded insulated valve cover has mechanical strength and insulation reliability;

[0048] The overcurrent protection is automatically reset after the flow resumes normal, reducing manual intervention. BRIEF DESCRIPTION OF DRAWINGS

[0049] Fig. 1 A high-temperature fuse gas ball valve overall sectional view is proposed for the embodiment of the present application;

[0050] Fig. 2 A high-temperature fuse gas ball valve partial sectional view is proposed for the embodiment of the present application;

[0051] Fig. 3 A high-temperature fuse gas ball valve sectional oblique view is proposed for the embodiment of the present application;

[0052] 1, valve body assembly; 2, fuse support; 3, fuse spring; 4, fuse valve core; 5, overcurrent valve core; 6, cut-off spring; 7, overcurrent support; 8, sealing gasket; 9, valve ball; 10, valve cover insert; 11, PE insulation layer; 12, outer tooth insert. DETAILED DESCRIPTION

[0053] For further understanding of the content of the present application, the present application is described in detail in combination with the drawings and embodiments.

[0054] Embodiment 1

[0055] In combination with the drawings Figs. 1-3 A high-temperature fuse gas ball valve, including valve body assembly 1, provided with gas inlet channel, gas outlet channel and valve cavity; valve ball 9, provided in the valve cavity, for controlling the on-off of gas; high-temperature fuse mechanism, provided at the inlet of the gas inlet channel, including fuse support 2, fuse valve core 4 and fuse spring 3, fuse valve core 4 is fixed with fuse support 2 through low-temperature solder, when the temperature is too high, the solder melts, fuse spring 3 pushes fuse valve core 4 to realize hard sealing cut-off; overcurrent cut-off mechanism, integrated in the inside of valve ball 9, including overcurrent valve core 5, overcurrent support 7, cut-off spring 6 and sealing gasket, when the flow is abnormal, overcurrent valve core 5 is displaced to abut against the sealing gasket to realize sealing; insulation valve cover assembly, including metal insert and PE insulation layer 11 covering the outside of the metal insert, for electrically isolating the valve body from the external pipeline. In the normal operating state, gas enters through the gas inlet channel of valve body assembly 1, and the on-off is controlled by valve ball 9. When the ambient temperature exceeds the set threshold (100℃±5℃), the low-temperature solder of the high-temperature fuse mechanism melts, and the fuse spring 3 pushes the fuse valve core 4 to realize hard sealing cut-off; when the flow abnormally increases, the overcurrent cut-off mechanism drives the overcurrent valve core 5 to displace and seal through the dynamic balance of fluid pressure and the force of cut-off spring 6; the insulation valve cover assembly permanently isolates the metal parts through the PE insulation layer 11, forming an electrical safety barrier.

[0056] The welding melting point of the high-temperature fusing mechanism is 100℃±5℃, the solder is tin-based alloy, and the metal taper sealing structure is adopted between the fusing valve core 4 and the valve body inlet passage. The tin-based solder maintains a solid structure at room temperature, fixing the fusing valve core 4 and the fusing support 2; when the ambient temperature reaches the critical point, the solder melts instantaneously, releasing the pre-tightening force of the fusing spring 3, pushing the taper of the fusing valve core 4 to form a metal-metal seal with the valve body passage, and this sealing mechanism can withstand the continuous high temperature in the fire scene.

[0057] The overcurrent valve core 5 of the overcurrent cut-off mechanism is provided with a guide shaft shoulder, the overcurrent support 7 is provided with a corresponding guide hole, and the cut-off spring 6 acts on the rear end of the overcurrent valve core 5 to keep it in the open position under normal flow. Under normal flow, the fluid pressure and the thrust of the cut-off spring 6 are balanced, and the overcurrent valve core 5 remains in the open position; when the flow exceeds the limit, the inlet pressure increases to push the overcurrent valve core 5 to displace along the guide shaft shoulder, compress the cut-off spring 6 and make the sealing gasket press the valve ball 9 passage; after the pressure returns to normal, the cut-off spring 6 accurately pushes the valve core to reset along the guide structure.

[0058] The metal insert of the insulating valve cover assembly is made of brass, and the PE insulating layer 11 is coated on the outside of the insert through the injection molding process to form a whole insulating structure. During the injection molding process, the PE material completely covers the brass insert to form a continuous insulating layer. When external current tries to conduct through the valve body, the high resistance characteristic of the PE layer blocks the current path, making the end potential of the gas pipeline zero, and fundamentally avoiding the ignition of gas explosion caused by electric spark.

[0059] The sealing gasket of the overcurrent cut-off mechanism is made of rubber or polytetrafluoroethylene, and the front end of the overcurrent valve core 5 is provided with a mounting groove for fixing the sealing gasket. The mounting groove at the front end of the overcurrent valve core 5 fixes the sealing gasket, and when the valve core displaces, the sealing gasket adheres to the wall surface of the valve ball 9 passage in an elastic deformation manner to form a soft seal; the material selection ensures that it is not easy to age in the gas medium for a long time.

[0060] The fusing support 2 of the high-temperature fusing mechanism is connected with the valve body assembly 1 through threads, and a sealing ring is arranged to prevent gas leakage. The threaded connection provides stable mechanical fixation, and the sealing ring forms a secondary sealing barrier at the threaded engagement position. When the fusing mechanism operates, this connection structure can withstand the impact force of the fusing spring 3 without loosening.

[0061] The valve ball 9 is provided with a fluid passage, and the overcurrent cut-off mechanism is arranged in the middle of the passage, and the displacement direction of the overcurrent valve core 5 is parallel to the fluid flow direction. When the fluid flows through the passage of the valve ball 9, it directly acts on the end surface of the overcurrent valve core 5, and the parallel displacement direction of the valve core and the flow direction reduces the flow resistance loss, so that the overcurrent protection is triggered more quickly.

[0062] The insulating valve cover assembly is connected with the valve body assembly 1 by screw thread, and is air-tightly sealed by an O-shaped ring. During installation, the screw thread provides axial compression force, so that the O-shaped ring is elastically deformed to fill micro gaps and form air-tight sealing. The structure can maintain sealing performance when temperature changes.

[0063] A gas safety control system comprises a high-temperature fuse ball valve connected with a gas pipeline and a user terminal. When any part of the system is abnormal (such as pipeline pressure fluctuation or user terminal leakage), the three-protection mechanism of the ball valve and the system monitoring device are linked to form a multi-level protection system.

[0064] A gas ball valve installation method comprises step-by-step assembly process of a high-temperature fuse mechanism, an over-flow cut-off mechanism and an insulating valve cover assembly, comprising the following steps:

[0065] 1. First step: smoothly put the fuse valve core 4 into a special welding tool;

[0066] Second step: put in the fuse spring 3;

[0067] Third step: align the fuse support 2 with the fuse valve core 4 and smoothly rotate into the welding tool;

[0068] Fourth step: use a constant temperature welding wire to firmly weld the fuse valve core 4 with the fuse support 2;

[0069] Fifth step: rotate the fuse assembly: fuse support 2, fuse spring 3 and fuse valve core 4 into the gas inlet end of the valve body assembly 1, so as to instantly close the gas inlet source at an abnormally high temperature;

[0070] 2. First step: put the over-flow valve core 5 on the cut-off spring 6;

[0071] Second step: put the over-flow valve core 5 with the cut-off spring 6 into the corresponding small hole of the over-flow support 7;

[0072] Third step: press the sealing gasket into the groove of the over-flow valve core 5;

[0073] Fourth step: press the assembled valve core assembly: over-flow valve core 5, cut-off spring 6, over-flow support 7 and sealing gasket 8 into the valve ball 9;

[0074] Fifth step: assemble the valve core assembly: over-flow valve core 5, cut-off spring 6, over-flow support 7 and sealing gasket 8 into the valve body assembly 1, so as to automatically close or adjust the valve when the flow at the gas inlet end is abnormal;

[0075] 3. First step: connect and form the valve cover insert 10 and the outer tooth insert 12 by injection molding with the PE insulation layer 11;

[0076] Second step: the insulating valve cover assembly: valve cover insert 10, PE insulation layer 11, outer tooth insert 12 into the valve body assembly 1, the user connects with the gas connection pipe to realize the insulation effect. Through the step-by-step assembly process (such as welding the fuse assembly first, then pressing the overflow valve core 5, and finally injecting the valve cover), the assembly accuracy and relative position relationship of each functional module are ensured, so that the protection mechanism operates as designed. The assembly and operation principle of the high-temperature fuse mechanism: first, position the fuse valve core 4 in the special welding tool, then install the fuse spring 3 and align the fuse bracket 2, and then perform spot welding with constant temperature welding wire. The core of this step is to ensure the accuracy and consistency of the welding temperature (100℃±5℃). After welding, the whole assembly is screwed into the valve body air inlet end, at which time the fuse spring 3 is in a pre-compressed state. When the ambient temperature abnormally rises, the welding point melts at the designed temperature, releasing the fuse spring 3 to drive the valve core to instantaneously cut off the gas path, and its response reliability directly depends on the accurate control of the welding quality during assembly.

[0077] The assembly and operation principle of the overflow cut-off mechanism: the overflow valve core 5 is fitted with the cut-off spring 6, then the overflow bracket 7 is installed, the sealing gasket is pressed into the valve core groove, and the whole is pressed into the valve ball 9 passage. This assembly process ensures that the overflow valve core 5 can move freely in the valve ball 9 along the axial direction, and the sealing gasket is accurately aligned with the passage wall. When the flow in the pipeline is abnormal, the fluid pressure pushes the valve core to compress the cut-off spring 6, so that the sealing gasket tightly adheres to the passage wall to achieve sealing; after the flow is normal, the cut-off spring 6 pushes the valve core to accurately reset. The assembly quality directly determines the sensitivity and reset accuracy of the overflow protection.

[0078] The assembly and operation principle of the insulating valve cover assembly: the valve cover insert 10 and the outer tooth insert 12 form an integral insulating structure through PE injection molding process, and then are screwed into the valve body. The injection molding process ensures that the PE insulation layer 11 continuously and completely covers the metal insert without defects such as air holes or uneven thickness. After assembly, the insulation layer forms reliable electrical isolation between the valve body and the external pipeline, and can effectively block the conduction of electric current through the valve in the event of a leakage accident, avoiding the generation of electric sparks due to the electrification of the gas pipeline. This method ensures the durability and stability of the insulation performance through process control.

[0079] The above describes the present application and its embodiments in a schematic manner, which is not limiting, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired thereby, without departing from the purpose of the present application, similar structural modes and embodiments can be designed without creativity, which shall all belong to the protection scope of the present application.

Claims

1. A high-temperature fusible gas ball valve, characterized in that, include The valve body assembly is provided with an air inlet passage, an air outlet passage, and a valve chamber; The valve ball, located inside the valve cavity, is used to control the on / off of gas supply; The high-temperature fusion mechanism is located at the inlet of the air intake channel and includes a fusion bracket, a fusion valve core and a fusion spring. The fusion valve core and the fusion bracket are fixed by low-temperature solder. When the temperature exceeds the limit, the solder melts and the fusion spring pushes the fusion valve core to achieve hard sealing and cut-off. The overflow cut-off mechanism is integrated inside the valve ball, including an overflow valve core, an overflow support, a cut-off spring, and a sealing gasket. When the flow exceeds the limit, the overflow valve core moves to press against the sealing gasket to achieve a seal. An insulating valve cover assembly, comprising a metal insert and a PE insulating layer covering the outside, is used to electrically isolate the valve body from external piping.

2. The high-temperature fusible gas ball valve according to claim 1, characterized in that, The high-temperature melting mechanism has a welding melting point of 100℃±5℃, the solder is a tin-based alloy, and a metal conical sealing structure is used between the melting valve core and the valve body air inlet channel.

3. A high-temperature fusible gas ball valve according to claim 1, characterized in that, The overcurrent cut-off mechanism has an overcurrent valve core with a guide shoulder, an overcurrent bracket with a corresponding guide hole, and a cut-off spring acting on the rear end of the overcurrent valve core to keep it in the open position under normal flow conditions.

4. A high-temperature fusible gas ball valve according to claim 1, characterized in that, The metal insert of the insulating valve cover assembly is made of brass, and the PE insulation layer is wrapped around the outside of the insert through injection molding to form an integral insulation structure.

5. A high-temperature fusible gas ball valve according to claim 1, characterized in that, The sealing gasket of the overcurrent cut-off mechanism is made of rubber or polytetrafluoroethylene, and the front end of the overcurrent valve core is provided with an installation groove for fixing the sealing gasket.

6. A high-temperature fusible gas ball valve according to claim 1, characterized in that, The high-temperature fusing mechanism has a threaded connection between the fusing bracket and the valve body assembly, and is equipped with a sealing ring to prevent gas leakage.

7. A high-temperature fusible gas ball valve according to claim 1, characterized in that, The valve ball is provided with a fluid channel, and the overflow cut-off mechanism is located in the middle of the channel. The displacement direction of the overflow valve core is parallel to the fluid flow direction.

8. A high-temperature fusible gas ball valve according to claim 1, characterized in that, The insulating valve cover assembly and the valve body assembly are connected by threads and an airtight seal is achieved by an O-ring.

9. A gas safety control system, characterized in that, It includes a high-temperature fusible gas ball valve as described in any one of claims 1-8, and is connected to a gas pipeline and a user terminal.

10. A method for installing a gas ball valve as described in any one of claims 1-8, characterized in that, The process includes a step-by-step assembly of the high-temperature fuse mechanism, the overcurrent cut-off mechanism, and the insulating valve cover assembly, and includes the following steps:

1. First step: Carefully place the fusible valve core into the special welding fixture; Step 2: Insert the fuse spring; Step 3: Align the fuse bracket with the fuse valve core and screw it smoothly into the welding fixture; Step 4: Use constant temperature welding wire to firmly weld the fusible valve core to the fusible bracket; Step 5: Screw the fuse assembly (fusible bracket, fuse spring, and fuse valve core) into the air inlet of the valve body assembly to instantly shut off the air supply in case of abnormal high temperature.

2. First step: Put the shut-off spring on the overcurrent valve core; Step 2: Place the overcurrent valve core with the cut-off spring attached into the corresponding small hole of the overcurrent bracket; Step 3: Press the sealing gasket into the groove of the flow valve core; Step 4: Press the assembled valve core assembly—including the flow valve core, shut-off spring, flow support, and sealing gasket—into the valve ball; Step 5: Install the valve core assembly: overflow valve core, shut-off spring, overflow bracket, and sealing gasket into the valve body assembly. This will automatically close or adjust the valve when the air flow at the inlet is abnormal.

3. First step: Injection mold the valve cover insert and the external thread insert together using a PE insulating layer; Step 2: Screw the insulating valve cover assembly (valve cover insert, PE insulation layer, and external thread insert) into the valve body assembly. After the user connects it to the gas connection pipe, the insulation effect is achieved.

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