Gas meter front valve and key thereof

Abstract

The utility model belongs to the technical field of valves, and discloses a gas meter front valve and a key thereof, which comprise a valve body, a valve rod and a handle, a valve ball is arranged in the valve body, the valve ball is provided with a valve ball channel and a rotating groove, a first end of the valve rod is connected with the handle, a second end of the valve rod forms a rotating bump, the rotating bump is inserted into the rotating groove, and the valve rod is driven by rotating the handle. The position of a valve ball channel is changed, and the inside of the valve body is controlled to be switched on and off; a positioning protruding block is formed at the first end of the valve rod, a locking positioning groove is formed in the side face of the positioning protruding block, a spring and a locking magnet are sequentially arranged in the locking positioning groove, and a locking groove is formed in the inner side face of the handle. By designing a locking mechanism, a user is prevented from opening the valve arbitrarily, benefits of a gas company and life and property safety of the user are guaranteed, it can be guaranteed that the gas valve cannot be opened under the condition that a pipeline is abnormal or the user has potential safety hazards, and possible safety accidents such as fire disasters and explosions are avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, especially relate to a gas meter front valve and its key. BACKGROUND

[0002] The gas meter front valve is a device for controlling gas flow, usually installed in the front pipe connected with the gas meter, with functions such as on-off control, flow regulation and safety protection. The gas meter front valve has a wide range of applications in homes, businesses and industrial environments, mainly used to regulate the flow, pressure and size of gas. Typical application scenarios include gas stoves, water heaters, boilers, gas heating systems, industrial equipment, etc.

[0003] The gas meter front valve usually controls the flow of gas by changing the opening area or position inside the valve. In daily life, the gas meter front valve is usually controlled by manual operation or electric actuators to meet different needs; while in industry, automatic control systems are often used to monitor and adjust parameters such as flow and pressure in real time with sensors.

[0004] The gas meter front valve not only bears the function of regulating gas flow and pressure, but also is a key device to ensure the safe operation of gas equipment.

[0005] Its main functions and advantages include:

[0006] Safety assurance: The gas meter front valve is a critical safety component in the gas system, which can automatically shut off the gas source in case of gas leakage or excessive pressure to prevent accidents. For example, modern gas meter front valves often come with overpressure protection, gas leakage detection, and overcurrent protection to ensure the safety of the gas use environment.

[0007] Precise flow regulation: The gas meter front valve can accurately regulate gas flow and pressure to ensure normal operation of the equipment and combustion efficiency. In boilers or other equipment that require stable gas supply, precise flow regulation can improve combustion efficiency, reduce energy waste, and achieve more efficient heat conversion.

[0008] Intelligent and remote control: With the development of Internet of Things technology, more and more gas meter front valves support remote control and intelligent management. For example, users can remotely turn on or off the gas meter front valve or adjust the flow through a smartphone app, and monitor the use of gas in real time. This not only improves user experience, but also improves the safety and convenience of gas use.

[0009] Energy-saving effect: By intelligently adjusting the flow and pressure of gas, the gas table front valve can avoid waste of gas and improve the overall energy utilization efficiency of the system. Especially in industrial and commercial applications, the energy-saving gas table front valve can greatly reduce energy costs while ensuring production efficiency.

[0010] However, the traditional gas table front valve cannot be locked, and when the user is in arrears or the gas pipeline is abnormal, if the user opens the gas table front valve by himself, it will cause certain loss to the gas company and threaten the personal safety of the user. SUMMARY

[0011] To solve the above technical problems, the utility model provides a kind of gas table front valve and its key, can normally open and close when user normally uses gas, and when user occurs leakage and other fault problems during using gas, user can close this valve by oneself, cut off gas supply, protect the personal safety and property safety of user. When user is on a business trip, or long-term not at home, when gas management department finds abnormal arrears and abnormal gas use and pipeline abnormal phenomenon, gas management department can lock the user gas valve in time, and when the user comes home, also cannot open gas valve by oneself, only after paying, detection, repair, contact gas management department can carry out ventilation. Guarantee the interests of gas company, protect the personal safety and property of user at the same time.

[0012] The above technical purpose of the utility model is realized by the following technical scheme:

[0013] A kind of gas table front valve, including valve body, valve rod and handle, valve ball is arranged in valve body, valve ball is opened valve ball passage and rotation groove, valve rod first end connects handle, valve rod second end forms rotation lug, rotation lug is inserted into rotation groove, valve rod is driven by rotating handle, in turn drives valve ball to rotate, changes valve ball passage position, controls the inside of valve body to be connected or disconnected;The first end of the valve rod forms a positioning lug, and a locking positioning groove is formed on the side surface of the positioning lug.A spring and a locking magnet are sequentially arranged in the locking positioning groove, and a locking groove is formed on the inner side surface of the handle.

[0014] By adopting the above technical scheme, the handle is twisted, the locking groove and the locking positioning groove are corresponded, the spring pops out the locking magnet, and the locking magnet is clamped into the locking groove. The locking mechanism of the gas meter front valve ensures that the gas company can prevent the user from opening the gas meter front valve at will when the user is in arrears or the gas pipeline is abnormal, thereby effectively protecting the interests of the gas company and reducing unnecessary gas loss. The locking design not only prevents misoperation, but also ensures that the gas meter front valve cannot be opened in the case of pipeline abnormality or user safety hazard, thereby avoiding possible safety accidents such as fire and explosion, and protecting the life and property safety of the user. The locking design can prevent the user from opening the valve door unintentionally, thereby reducing the risk of gas leakage or illegal gas taking, and ensuring the safety and stability of the entire gas system. Since the gas meter front valve can effectively avoid gas leakage caused by human operation, gas use is more efficient, energy waste is reduced, and the risk of environmental pollution caused by gas leakage is also reduced.

[0015] Further settings, the positioning protrusion is provided with a positioning pin groove, and a positioning pin protrusion is arranged in the positioning pin groove.

[0016] Further settings, a positioning inclined groove is formed in the inner side of the handle.

[0017] By adopting the above technical scheme, the positioning protrusion and the positioning pin groove can ensure that the valve rod maintains accurate position during operation, avoiding the phenomenon of valve rod deviation or misalignment. The positioning pin protrusion and the positioning pin protrusion clamping groove in the handle further ensure the accurate cooperation between the handle and the valve rod, avoiding loosening or deviation caused by human operation or external force. The combination of the positioning pin groove and the positioning pin protrusion makes the valve rod more stable and reliable during operation, ensuring that the control position of the valve ball is always accurate, avoiding the situation that the valve ball cannot be accurately positioned, thereby improving the operation accuracy of the valve. The positioning inclined groove on the inner side of the handle, combined with the positioning protrusion and the locking magnet, can ensure that the locking mechanism is more firm when locked. When the handle is rotated, the positioning inclined groove guides the locking magnet to smoothly enter the positioning position, enhances the stability of the locking process, and ensures that the locking magnet can be accurately clamped into the locking positioning groove, avoiding locking failure caused by improper operation or external force.

[0018] Further settings, the first port of the valve body is formed with an internal thread, one end of the extension piece is formed with an external thread, and the internal thread and the external thread are matched.

[0019] By adopting the above technical scheme, the cooperation design of the inner and outer threads provides a more secure connection, making the connection between the valve body and the extension piece more stable and reliable. The threaded connection can provide stronger mechanical locking force, preventing the connection from loosening due to external force or vibration. In addition, the threaded structure can generally ensure better sealing, reducing the risk of gas leakage due to loose connection, and improving the overall safety of the gas meter front valve. During installation, only the extension piece needs to be rotated to easily complete the connection, avoiding the difficulties and labor costs brought by welding, bayonet or other complex connection methods. When disassembling, only the extension piece needs to be rotated to complete the separation, facilitating daily maintenance and equipment replacement.

[0020] Further settings, the first port of the valve body is connected to the extension piece, and the extension piece is sleeved with the gas meter adapter cap.

[0021] By adopting the above technical scheme, the gas meter front valve adopts the gas meter adapter cap, simplifying the installation, disassembly and replacement process. During routine maintenance or equipment replacement, the adapter cap can be quickly loosened for disassembly, reducing the complexity of disassembly and reassembly, and improving maintenance efficiency. The gas meter adapter cap provides a more stable and sealed connection, ensuring that the connection between the gas meter front valve and the gas meter does not loosen or leak, reducing the risk of gas leakage. In emergency situations, quickly disassembling the adapter cap can also help to quickly cut off the gas source, ensuring the safety of the gas system. The gas meter adapter cap allows the gas meter front valve to adapt to different pipeline systems and environmental conditions, especially in applications with large temperature and pressure changes. The adapter cap can effectively maintain the stability of the connection, ensuring the safe and stable operation of the equipment.

[0022] Further settings, the extension piece forms a locking groove, and a locking ring is arranged in the locking groove.

[0023] By adopting the above technical scheme, the locking groove and the locking ring can prevent the connection between the extension piece and the valve body from loosening. The locking ring, through cooperation with the locking groove, provides additional locking force for the connection during use, avoiding the loosening of the valve body and the extension piece under high pressure, vibration or long-term use, ensuring the stability of the gas meter front valve during operation, and preventing gas leakage or equipment failure caused by loose connection. The presence of the locking ring can prevent the connection from falling off or loosening due to operation errors or external forces (such as vibration, tension, etc.), improving the safety of the entire gas system. In the application of the gas meter front valve, any loose or insecure connection can cause gas leakage and increase safety hazards. The locking ring reduces this risk, ensuring the long-term stability and safety of the gas equipment.

[0024] Further settings, a first sealing ring is arranged between the gas meter adapter cap and the extension piece.

[0025] By adopting the above technical scheme, the sealing performance between the gas meter front valve and the gas meter live cap is enhanced by setting the first sealing ring. The sealing ring can form a reliable sealing barrier at the connection to prevent gas leakage through the joint. Since gas usually bears high pressure during transportation and use, it is crucial to ensure the sealing of the connection part. The design of the sealing ring can effectively avoid leakage caused by improper installation or external pressure fluctuations, thereby ensuring the safety of the system. Since the gas system may bear high pressure during operation, the sealing ring can ensure that the joint maintains good sealing effect under high pressure environment. The first sealing ring can be compressed when subjected to external pressure, tightly fitting the contact surface to prevent high-pressure gas leakage, improving the stability and safety of the gas meter front valve in high-pressure gas environment, and being suitable for high-pressure gas system applications.

[0026] Further setting, the valve body forms a valve seat inside, and the valve ball is located in the valve seat.

[0027] By adopting the above technical scheme, the valve seat provides a stable and precise positioning position for the valve ball, so that the valve ball can form good sealing contact with the valve seat during opening and closing. The valve seat ensures that the valve ball can accurately regulate gas flow, avoiding leakage or unstable flow caused by valve ball position deviation or shaking. Good sealing performance can effectively prevent gas leakage, ensure system safety, and improve flow control accuracy. The valve seat can effectively reduce the adverse effects of external vibration or impact by providing stable support, ensuring that the valve ball can still work stably under vibration or impact. For industrial applications that require anti-vibration, the design of the valve seat can provide higher anti-vibration performance to avoid valve ball instability or valve function loss caused by vibration.

[0028] Further setting, a second sealing ring is arranged between the valve ball and the valve seat.

[0029] By adopting the above technical scheme, the second sealing ring can enhance the sealing performance between the valve ball and the valve seat. Even in a high-pressure or fluctuating gas environment, the second sealing ring can ensure good sealing contact between the two, preventing gas leakage. The second sealing ring can reduce the risk of leakage of the gas meter pre-valve in the closed state, ensuring the safety of the gas system. Due to long-term use, the ball and the valve seat may experience some wear or deformation, and the second sealing ring can effectively compensate for the small gap or mismatch between the two. The sealing ring provides a resilient effect, which can fill the gap between the valve ball and the valve seat, further ensuring the tightness and accuracy of the seal, and ensuring that the control of gas flow is not adversely affected. Since the sealing ring can ensure precise fitting between the valve ball and the valve seat, it can effectively reduce flow fluctuations caused by poor sealing. The second sealing ring can provide a stable sealing surface for the valve ball, ensuring smooth transition of gas flow during valve closing and opening, reducing air flow interference, and improving the accuracy and stability of flow control.

[0030] Further provided, the valve body is provided with a cylindrical filter screen.

[0031] By adopting the above technical scheme, the main function of the cylindrical filter screen is to filter out impurities such as solid particles, sand, connecting and sealing accessories used during installation, raw material belts, hemp, sealing cement blocks, rust and rust blocks generated during long-term operation of gas metal pipes, etc. If these impurities are not filtered directly into the gas meter, and then into the user's gas appliance, long-term accumulation will affect the accuracy of the gas meter, and in severe cases, the gas meter will be damaged. When impurities enter the user's gas appliance, it will affect the gas output of the user's gas appliance, and the gas appliance will have problems such as easy clogging of the gas outlet, difficulty in ignition, and blockage of the gas outlet, and in severe cases, the user's gas appliance will be damaged. By setting the cylindrical filter screen, the probability of the above problems can be reduced, the service life of the gas meter and the user's gas appliance after the meter can be protected, and the maintenance problems and property losses of the gas management department and the user can be further reduced.

[0032] A key for the above-mentioned gas meter pre-valve, comprising a key body, the body is adapted with the handle, and a magnet is arranged on the side wall of the body.

[0033] By adopting the above technical scheme, when the locking magnet is inserted into the locking groove and the gas meter pre-valve is in a locked state, the key is installed on the handle, the magnet corresponds to the position of the locking magnet, and the two repel each other, pushing the locking magnet out of the locking groove to achieve unlocking.

[0034] In summary, the utility model has the following beneficial effects:

[0035] 1. The utility model discloses a locking mechanism is designed to prevent the user from opening the valve arbitrarily, especially when the user is in arrears or the gas pipeline is abnormal, effectively guarantee the interests of gas company and the life and property safety of user. The locking mechanism can not only prevent misoperation, but also ensure that the valve before the gas meter cannot be opened in the case that the pipeline is abnormal or the user has safety hazards, avoid the possible fire, explosion and other safety accidents, and significantly improve the safety of the system.

[0036] 2. The utility model discloses a positioning lug, positioning pin slot and positioning pin lug slot are introduced between the valve stem and handle, ensure the accurate positioning of valve stem in the operation process, avoid the deviation or misalignment phenomenon. The positioning inclined slot of the inner side of handle can effectively guide the locking magnet to enter the positioning position, further enhance the stability of locking mechanism, make the operation of valve more reliable, ensure that the control position of valve ball is accurate all the time, improve the operation precision and stability of valve.

[0037] 3. The utility model discloses a magnet is arranged on the side wall of key body, and the key can interact with the locking magnet, and the unlocking process does not need complex mechanical operation. By installing the key on the handle, the magnet on the key and the locking magnet on the valve position correspond, utilize the repulsion of magnetic force, can easily push the locking magnet out of the locking groove, realize unlocking. This design makes the unlocking process more simple and fast, and the operation is more humanized. DRAWINGS

[0038] Figure 1 It is the structure schematic diagram of example 1 gas meter front valve;

[0039] Figure 2 It is the section structure schematic diagram of example 1 gas meter front valve;

[0040] Figure 3 It is the section view of example 2;

[0041] Figure 4 It is the part structure schematic diagram of example 1 gas meter front valve;

[0042] Figure 5 It is the part structure schematic diagram of example 1 gas meter front valve;

[0043] Figure 6 It is the structure schematic diagram of handle;

[0044] Figure 7 It is the structure schematic diagram of key;

[0045] Figure 8 It is the assembly drawing of key and gas meter front valve;

[0046] Figure 9 It is the structure schematic diagram of key and gas meter front valve

[0047] Figure 10 is a cross-sectional structure schematic diagram of the embodiment 2;

[0048] Figure 11 is a structure schematic diagram of the card slot.

[0049] Reference signs, 1, valve body; 1-1, first port; 1-2, extension; 1-2-1, locking groove; 1-2-2, locking ring; 1-3, valve seat; 1-4, cylindrical filter screen; 1-5, clamping spring;

[0050] 2, valve rod; 2-1, rotating lug; 2-2, positioning lug; 2-2-1, positioning pin groove; 2-2-2, positioning pin lug; 2-2-3, locking positioning groove; 2-2-4, spring; 2-2-5, locking magnet;

[0051] 3, handle; 3-1, positioning inclined groove; 3-2, locking groove; 3-3, positioning pin lug clamping groove;

[0052] 4, valve ball; 4-1, valve ball passage; 4-2, rotating groove; 4-3, second sealing ring;

[0053] 5, gas meter joint cap; 5-1, first sealing ring;

[0054] 6, main body; 6-1, magnet. DETAILED DESCRIPTION

[0055] The preferred embodiments of the utility model are described in detail below with reference to the drawings.

[0056] As Figures 1-2 , 3-9, the embodiment 1 gas meter front valve, including valve body 1, valve rod 2 and handle 3, valve body 1 is provided with valve ball 4, valve ball 4 is provided with valve ball passage 4-1 and rotating groove 4-2, valve rod 2 first end is connected with handle 3, and valve rod 2 second end forms rotating lug 2-1, rotating lug 2-1 is inserted into rotating groove 4-2, and rotating handle 3 drives valve rod 2, and then drives valve ball 4 to rotate, changes valve ball passage 4-1 position, controls the inside on-off of valve body 1;Valve rod 2 first end forms positioning lug 2-2, and the side surface of position lug 2-2 is provided with locking positioning groove 2-2-3, and locking positioning groove 2-2-3 is sequentially provided with spring 2-2-4 and locking magnet 2-2-5, and the inner side surface of handle 3 is provided with locking groove 3-2.

[0057] Positioning lug 2-2 is provided with positioning pin groove 2-2-1, and positioning pin groove 2-2-1 is provided with positioning pin lug 2-2-2, and the inner of handle 3 is provided with positioning pin lug clamping groove 3-3.The inner side surface of handle 3 is provided with positioning inclined groove 3-1.

[0058] The first port 1-1 of the valve body 1 is connected to the extension piece 1-2, and the extension piece 1-2 is sleeved with the gas meter adapter cap 5. The extension piece 1-2 forms a locking groove 1-2-1, and a locking ring 1-2-2 is arranged in the locking groove 1-2-1. The first sealing ring 5-1 is arranged between the gas meter adapter cap 5 and the extension piece 1-2.

[0059] The valve body 1 is internally formed with a valve seat 1-3, and the valve ball 4 is located in the valve seat 1-3. The second sealing ring 4-3 is arranged between the valve ball 4 and the valve seat 1-3.

[0060] The valve body 1 comprises the internal valve seat 1-3 and the valve ball 4 for controlling the on-off of gas.

[0061] The valve ball 4 is internally formed with a valve ball channel 4-1, and the valve ball channel 4-1 is changed by rotating, so as to control the on-off of gas flow of the valve body 1.

[0062] The valve stem 2 is used for connecting the handle 3 and the valve ball 4. By rotating the handle 3, the valve stem 2 is driven to move the valve ball 4, so as to change the state of gas flow.

[0063] The valve stem 2 is connected to the handle 3 at the first end, and the second end of the valve stem 2 is provided with a rotating lug 2-1, which is inserted into a rotating groove 4-2 of the valve ball 4. By rotating the handle 3, the valve stem 2 is driven to rotate, so as to drive the valve ball 4 to rotate, adjust the opening and closing of the valve ball channel 4-1, and control the flow of gas.

[0064] The positioning lug 2-2 and the positioning pin groove 2-2-1 of the valve stem 2 ensure accurate positioning of the valve stem 2 during operation, prevent the valve stem 2 from deviating or misalignment, ensure that the valve ball 4 is always in the correct position, and ensure accurate control of flow or pressure.

[0065] The positioning inclined groove 3-1 and the positioning recess 3-2 in the handle 3 are used in cooperation with a safety valve cover in the hands of a gas company through the magnetic spring 2-2-4. The safety valve cover has magnetism, and can adjust the handle 3 to a locked position through the magnetic spring 2-2-4, so as to prevent the handle 3 from being unintentionally rotated to cause adjustment of gas flow or accidental opening. The locked positioning groove 2-2-3 and the magnetic spring 2-2-4 further enhance the safety of operation of the valve stem 2, and avoid unsafe operation caused by pressure fluctuation and other factors.

[0066] The extension piece 1-2 is fitted with the gas meter union cap 5. The gas meter union cap 5 simplifies the installation, disassembly, and replacement process, and its quick removal reduces complexity and improves maintenance efficiency. The locking groove 1-2-1 and locking ring 1-2-2 further enhance connection stability, prevent loosening, and ensure the safety and reliability of the gas meter's upstream valve during long-term use. A first sealing ring 5-1 is installed between the gas meter union cap 5 and the extension piece 1-2 to enhance sealing and prevent gas leakage. A second sealing ring 4-3 is installed between the valve ball 4 and the valve seat 1-3 to ensure good sealing performance even under high pressure and fluctuating gas conditions, preventing gas leakage and ensuring precise valve control.

[0067] Valve seat 1-3 provides stable support for valve ball 4, ensuring good sealing contact between valve ball 4 and valve seat 1-3, and preventing valve ball 4 from shifting or shaking due to external forces, thereby avoiding leakage or unstable flow.

[0068] The user drives the valve stem 2 by turning the handle 3. The valve stem 2 drives the valve ball 4 to rotate. The rotation of the valve ball 4 changes the position of the valve ball channel 4-1, controlling the flow of gas or shutting it off.

[0069] The key, used for the aforementioned gas meter valve, includes a key body 6, which is adapted to a handle 3. A magnet 6-1 is disposed on the side wall of the key body 6, and the magnet 6-1 corresponds to the locking groove 3-2. When the locking magnet 2-2-5 is engaged in the locking groove 3-2 and the gas meter valve is in the locked state, the key is installed on the handle 3. The magnet 6-1 and the locking magnet 2-2-5 are aligned, and they repel each other, pushing the locking magnet 2-2-5 out of the locking groove 3-2, thus unlocking the valve.

[0070] like Figure 3 , 10 As shown in -11, Example 2 differs from Example 1 in that a cylindrical filter screen 1-4 is provided inside the valve body 1.

[0071] The cylindrical filter screen 1-4 is tightly fitted into the valve body 1 and secured in place by the retaining spring 1-5, preventing it from easily falling out. If cleaning is required, professional maintenance personnel only need to insert a hook-like object into the mesh of the cylindrical filter screen 1-4, gently pull it out, clean it, and then press it back into the valve body 1.

[0072] The cylindrical filter screen 1-4 effectively filters impurities entering the valve body before the gas meter, such as solid particles, oil, and moisture. If these impurities are not filtered out, they may clog the valve ball passage 4-1, causing valve malfunction or failure, or even damaging the valve ball 4 or valve seat 1-3. Therefore, installing the cylindrical filter screen 1-4 can protect the precision components inside the valve and extend its service life.

[0073] The above-mentioned embodiments are merely an explanation of the present application, which is not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, as long as the modifications are within the scope of the claims of the present application.

Claims

1. A gas meter front valve characterized by, The utility model relates to a valve, including valve body (1), valve rod (2) and handle (3), valve body (1) is provided with valve ball (4) in, valve ball (4) is provided with valve ball channel (4-1) and rotation groove (4-2), valve rod (2) first end connects handle (3), and the second end of valve rod (2) forms rotation lug (2-1), and rotation lug (2-1) is inserted into rotation groove (4-2), and valve rod (2) is driven through rotation handle (3), and then valve ball (4) is rotated, changes valve ball channel (4-1) position, controls the inside on-off of valve body (1);Valve rod (2) first end forms locating lug (2-2), and the side surface of bit lug (2-2) is provided with locking positioning groove (2-2-3), and locking positioning groove (2-2-3) is provided with spring (2-2-4) and locking magnet (2-2-5) in proper order, and the inside surface of handle (3) is provided with locking recess (3-2).

2. The gas meter front valve of claim 1, wherein, The positioning lug (2-2) is provided with a positioning pin groove (2-2-1), and a positioning pin lug (2-2-2) is arranged in the positioning pin groove (2-2-1).

3. The gas meter front valve of claim 1, wherein, The inside surface of the handle (3) is provided with a positioning inclined groove (3-1).

4. The gas meter front valve of claim 1, wherein, The first port (1-1) of the valve body (1) is connected to an extension piece (1-2), and the extension piece (1-2) is sleeved with a gas meter joint cap (5).

5. The gas meter front valve of claim 4, wherein, The extension piece (1-2) is provided with a locking groove (1-2-1), and a locking ring (1-2-2) is arranged in the locking groove (1-2-1).

6. The gas meter front valve of claim 5, wherein, A first sealing ring (5-1) is arranged between the gas meter joint cap (5) and the extension piece (1-2).

7. The gas meter front valve of claim 4, wherein, The valve body (1) is provided with a valve seat (1-3) inside, and the valve ball (4) is located in the valve seat (1-3).

8. The gas meter front valve of claim 7, wherein, A second sealing ring (4-3) is arranged between the valve ball (4) and the valve seat (1-3).

9. The gas meter front valve of claim 1, wherein, The valve body (1) is provided with a cylindrical filter screen (1-4) inside.

10. A key, characterized in that The utility model relates to a valve for a gas meter, comprising a key body (6) which is adapted to the handle (3), and a magnet (6-1) is arranged on the side wall of the key body (6) and corresponds to the locking recess (3-2).

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