Safety function-independent and breakage-proof gas self-closing valve

Abstract

The utility model provides an anti-damage gas self-closing valve with an independent safety function. The anti-damage gas self-closing valve comprises a gas self-closing valve body. A pressure regulating assembly, an overflowing assembly and a resetting assembly are arranged in the gas self-closing valve body; the voltage regulating assembly and the over-current assembly are independently arranged; the pressure regulating assembly is movably arranged in the gas self-closing valve body, reciprocates along with the change of the pressure in the valve cavity, and seals the gas inlet of the gas self-closing valve body when the valve cavity is overpressure or underpressure; the overflowing assembly is movably arranged at the gas outlet of the gas self-closing valve body and blocks the gas outlet of the gas self-closing valve body when the pressure of the valve cavity is overhigh; the reset assembly is rotationally arranged on the gas self-closing valve body in a sealed mode and extends into the gas self-closing valve body, and the reset assembly is used for driving the overflowing assembly to reset. The pressure regulating assembly and the overflowing assembly are independently arranged, when the pressure regulating assembly is forcibly fixed to shield the pressure self-closing function of the self-closing valve, the overflowing assembly is continuously closed, the overflowing protection function of the gas self-closing valve body still works normally, and gas use safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gas self - closing valves, and particularly to a gas self - closing valve with independent safety functions and anti - damage features. Background Art

[0002] At present, the safe use of gas has become a common concern of gas enterprises, the general public and even the whole society. With the improvement of people's living standards and the strengthening of safety awareness, the demand for gas safety protection products has become increasingly urgent. As a result, there has emerged a pipeline gas self - closing valve, which can automatically cut off the gas source when problems such as over - pressure, under - pressure, and over - current occur in the indoor gas pipeline, ensuring the safe use of gas by residents.

[0003] With the widespread installation and use of pipeline gas self - closing valves, due to fluctuations in gas supply pressure, insufficient gas supply, or supply requirements exceeding the standard requirements, there is a certain probability that the self - closing valve will quickly close and cut off the protection. Some gas users do not understand the safety functions of the self - closing valve. To ensure continuous gas use, they forcibly fix the action mechanism of the self - closing valve, resulting in the failure of the over - current safety function of the self - closing valve. At the same time, in special cases, people forcibly shield the safety function of the self - closing valve, causing the self - closing valve to leak directly. In view of the above situation, an anti - damage self - closing valve with an over - current protection function is invented to avoid the above - mentioned situations.

[0004] At present, the pressure cut - off protection function and the over - current cut - off protection function of existing self - closing valves are related and cannot work independently. When there is an over - current, users forcibly fix the knob mechanism of the self - closing valve, resulting in the self - closing valve being unable to close automatically, so that the self - closing valve cannot be completely closed and continues to leak. Content of the Utility Model

[0005] The utility model discloses a gas self - closing valve with independent safety functions and anti - damage features, aiming to solve the technical problem that the pressure cut - off protection function and the over - current cut - off protection function of existing self - closing valves are related and cannot work independently. When there is an over - current, users forcibly fix the knob mechanism of the self - closing valve, resulting in the self - closing valve being unable to close automatically, so that the self - closing valve cannot be completely closed and continues to leak.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A gas self - closing valve with independent safety functions and anti - damage features includes: a gas self - closing valve body; a pressure regulating component, an over - current component, and a reset component are arranged in the gas self - closing valve body; the pressure regulating component and the over - current component are independently arranged;

[0008] The pressure regulating component is movably arranged in the gas self - closing valve body, and is used for reciprocating movement with the change of the pressure in the valve cavity, and is used for closing the air inlet of the gas self - closing valve body when the valve cavity is over - pressured or under - pressured;

[0009] The overcurrent component is movably arranged at the air outlet of the gas self-closing valve body and is used to block the air outlet of the gas self-closing valve body when the pressure in the valve cavity exceeds the pressure limit.

[0010] The reset component is hermetically and rotatably arranged on the gas self-closing valve body and extends into the gas self-closing valve body. The reset component is used to drive the overcurrent component to reset.

[0011] Furthermore, a knob component is further included. The knob component includes: a knob and a knob cap.

[0012] The knob is connected to the top end of the pressure regulating component. The top of the knob cap is placed inside the knob and is snap-fitted. The knob is used to drive the knob cap to move, and further drive the pressure regulating component to move to complete the reset of the gas self-closing valve body.

[0013] Furthermore, a lifting opening is arranged on the inner wall of the knob. A thin-wall step is arranged on the top side edge of the knob cap. The knob lifts the thin-wall step to move through the lifting opening, thereby driving the knob cap to move, so as to drive the pressure regulating component to move to complete the reset of the gas self-closing valve body.

[0014] Furthermore, the overcurrent component includes: an overcurrent retaining ring, an overcurrent spring, an umbrella frame, an overcurrent seat, an O-ring, and an umbrella-shaped overcurrent piece.

[0015] The overcurrent retaining ring is movably arranged in the valve cavity of the gas self-closing valve. One end of the overcurrent spring is connected to the retaining ring, and the other end is connected to the umbrella frame. The overcurrent spring has a force to push the retaining ring to move away from the umbrella frame.

[0016] The overcurrent seat is fixedly arranged in the air outlet of the gas self-closing valve body. The O-ring is used to seal the gap between the overcurrent seat and the inner wall of the air outlet. The umbrella frame is inserted and fixed in the overcurrent seat.

[0017] The umbrella-shaped overcurrent piece includes an overcurrent rod and an umbrella-shaped piece. One end of the overcurrent rod is fixedly connected to the overcurrent retaining ring, and the other end is fixedly connected to the umbrella-shaped piece. The overcurrent spring is sleeved outside the overcurrent rod. The overcurrent rod penetrates through the umbrella frame and can slide in the umbrella frame. The umbrella-shaped piece is located inside the umbrella frame. The reset component can push the umbrella-shaped piece to move to reset and ventilate the gas self-closing valve body.

[0018] The umbrella-shaped piece is used to reciprocate in the umbrella frame with the change of the pressure in the valve cavity.

[0019] Furthermore, the pressure regulating component includes: a magnetic ring component, a diaphragm component, a knob component, and a piston component.

[0020] The diaphragm assembly is disposed inside the gas self - closing valve body and is used to divide the interior of the gas self - closing valve body into a valve cavity and a pressure regulating cavity;

[0021] The knob assembly is connected to the diaphragm assembly and is used to drive the diaphragm assembly to move up and down; the bottom end of the diaphragm assembly is magnetically attracted to the magnetic ring assembly, and the magnetic ring assembly is drivingly connected to the piston assembly; after being magnetically attracted, the magnetic ring assembly drives the piston assembly to close the air inlet of the gas self - closing valve body.

[0022] Further, the magnetic ring assembly includes: a flat - head screw, a magnetic ring, a magnet wrapper, a slider with an inclined groove, and a magnetic attraction frame;

[0023] The magnetic attraction frame is fixedly disposed inside the gas self - closing valve body; the magnet wrapper is wrapped around the outside of the magnetic ring; the magnetic ring is magnetically attracted to the magnetic attraction frame; the slider penetrates through the magnetic attraction frame and is slidably matched with the magnetic attraction frame; the flat - head screw penetrates through the magnetic ring and is fixedly connected to the slider;

[0024] During the process of the magnetic ring magnetically attracting the magnetic attraction frame, it drives the slider to move downward, and the slider drives the piston assembly to open or close the air inlet of the gas self - closing valve body through the inclined groove.

[0025] Further, the diaphragm assembly includes: a pull rod, a diaphragm pressing piece, a flat washer, and a diaphragm;

[0026] The diaphragm is disposed inside the gas self - closing valve body to divide the interior of the gas self - closing valve body into a valve cavity and a pressure regulating cavity; the knob assembly is connected to the pull rod, the pull rod penetrates through the diaphragm and is fixedly connected to the diaphragm through the flat washer; the bottom end of the pull rod is magnetically attracted to the magnetic ring assembly, and the knob is connected to the pull rod.

[0027] Further, the knob assembly includes: a knob and a knob cap;

[0028] A lifting opening is provided on the inner wall of the knob; the knob cap is connected to the top end of the pull rod; the top of the knob cap is conveniently placed inside the knob; a thin - walled step is provided on the top side edge of the knob cap, and the knob drives the thin - walled step to move through the lifting opening, thereby driving the knob cap to move, so as to drive the pull rod to move by the knob cap.

[0029] Further, the piston assembly includes: a piston rod, a guide block, and a gasket;

[0030] The piston rod penetrates through the air inlet of the gas self-closing valve body and can slide within the air inlet; one end of the piston rod located outside the air inlet is connected to the gasket, and the end located within the valve cavity is a free end;

[0031] The slider is slidably arranged within the valve cavity through a slider positioning seat; the guiding block is fixed on the side wall of the piston rod, and the guiding block is located within the inclined slot of the slider. The up-and-down movement of the slider can drive the guiding block to drive the piston rod to move left and right.

[0032] Further, a U-shaped clearance groove is provided at the free end of the piston rod, and the U-shaped clearance groove is used to avoid the overcurrent retaining ring.

[0033] Further, the reset assembly includes: a knob, a valve rod, and a ball core;

[0034] The ball core is placed within the air outlet pipe of the gas self-closing valve body and can rotate within the air outlet pipe. A channel is provided on the ball core for connecting or disconnecting the air outlet pipe; the valve rod is fixedly connected to the ball core, the knob is fixedly connected to the valve rod, and the knob can drive the valve rod to rotate, thereby driving the ball core to rotate within the air outlet pipe;

[0035] The valve rod is sealingly and rotatably connected to the gas self-closing valve body;

[0036] Rotating the ball core can cause the side wall of the ball core to squeeze the top end of the umbrella-shaped piece, so that the umbrella-shaped piece is separated from the overcurrent seat to complete the reset of the overcurrent assembly.

[0037] Further, it further includes: a tail joint;

[0038] The tail joint is sealingly connected to the right end of the gas self-closing valve body;

[0039] A filter screen is provided within the air inlet of the gas self-closing valve body.

[0040] As can be seen from the above, a gas self-closing valve with independent safety functions and anti-destruction provided by the present utility model includes: a gas self-closing valve body; a pressure regulating component, an over-current component, and a reset component are arranged in the gas self-closing valve body; the pressure regulating component and the over-current component are independently arranged; the pressure regulating component is movably arranged in the gas self-closing valve body and is used to reciprocate with the change of the pressure in the valve cavity, and is used to close the air inlet of the gas self-closing valve body when the pressure in the valve cavity is overpressure or underpressure; the over-current component is movably arranged at the air outlet of the gas self-closing valve body and is used to block the air outlet of the gas self-closing valve body when the pressure in the valve cavity is overpressure; the reset component is hermetically and rotatably arranged on the gas self-closing valve body and extends into the gas self-closing valve body, and the reset component is used to drive the over-current component to reset. By independently arranging the pressure regulating component and the over-current component, when the pressure regulating component is forcibly fixed to shield the pressure self-closing function of the self-closing valve, the over-current component continuously closes, and the over-current protection function of the gas self-closing valve body still works normally, ensuring gas use safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic structural diagram of a gas self-closing valve with independent safety functions and anti-destruction.

[0042] Figure 2 It is a schematic structural diagram of an over-current component.

[0043] Figure 3 It is another schematic structural diagram of an over-current component.

[0044] Figure 4 It is a schematic structural diagram of a magnetic ring component.

[0045] Figure 5 It is a schematic structural diagram of a diaphragm component.

[0046] Figure 6 It is a schematic structural diagram of a knob component.

[0047] Figure 7 It is a schematic structural diagram of a knob.

[0048] Figure 8 It is a schematic diagram of the open valve state of the self-closing valve.

[0049] Figure 9 It is a schematic diagram of the closed valve (underpressure) state of the self-closing valve.

[0050] Figure 10 It is a schematic diagram of the closed valve (overpressure) state of the self-closing valve.

[0051] Figure 11 It is a schematic diagram of the over-current closed valve state of the self-closing valve.

[0052] Figure 12 It is a schematic diagram of the over-current closed valve state of the self-closing valve.

[0053] Figure 13 It is a structural schematic diagram of a piston rod.

[0054] Figure 14 It is a structural schematic diagram of a filter screen.

[0055] In the attached drawings: 1. Gas self - closing valve body, 2. Diaphragm, 3. Pull button, 4. Pull button cap, 5. Pull rod, 6. Knob, 7. Valve stem, 8. Tail joint, 9. Ball core, 10. Over - current component, 11. Slide block positioning seat, 12. Slide block, 13. Magnetic ring, 14. Piston rod, 15. Sealing gasket, 16. Filter screen, 17. U - shaped clearance groove.

[0056] 1 - 1. Over - current retaining ring, 2 - 1. Over - current spring, 3 - 1. Umbrella frame, 4 - 1. Over - current seat, 5 - 1. O - ring, 6 - 1. Over - current rod, 7 - 1. Umbrella - shaped piece.

[0057] 1 - 2. Flat - head screw, 3 - 2. Magnet - wrapped piece, 4 - 2. Magnetic absorption frame.

[0058] 2 - 3. Diaphragm pressing piece, 3 - 3. Flat washer.

[0059] 3 - 4. Thin - walled step, 4 - 4. Pull - up opening. Specific implementation manners

[0060] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0061] As Figures 1 - 14 shown, a gas self - closing valve with independent safety functions and anti - sabotage disclosed by the present utility model includes: a gas self - closing valve body 1; a pressure - regulating component, an over - current component 10, and a reset component are arranged in the gas self - closing valve body 1; the pressure - regulating component and the over - current component 10 are independently arranged; the pressure - regulating component is movably arranged in the gas self - closing valve body 1 and is used for reciprocating movement with the change of the pressure in the valve cavity, and is used for closing the air inlet of the gas self - closing valve body 1 when the valve cavity is over - pressured or under - pressured; the over - current component 10 is movably arranged at the air outlet of the gas self - closing valve body 1 and is used for plugging the air outlet of the gas self - closing valve body 1 when the valve cavity pressure is over - pressured; the reset component is hermetically and rotatably arranged on the gas self - closing valve body 1 and extends into the gas self - closing valve body 1, and the reset component is used for driving the over - current component 10 to reset.

[0062] In this embodiment, in the existing self-closing valve, the pressure cut-off protection function is associated with the over-current cut-off protection function and cannot work independently; when the user forcibly fixes the mechanism of the self-closing valve lifting knob 3, the self-closing valve cannot close automatically, resulting in the self-closing valve being unable to close completely and continuously leaking air; the over-current valve is separately connected to the self-closing valve, increasing the leakage point; the lifting knob assembly is prone to misoperation or cannot achieve pressure-holding detection.

[0063] In view of the above problems, the applicant has the following ideas: adopt an over-current device that can achieve self-sealing to work independently with the pressure cut-off device of the self-closing valve; when forcibly lifting and fixing the lifting knob 3, shield the pressure self-closing function of the self-closing valve, and the over-current self-closing function can still be independently cut off; through an integrated built-in structure, shorten the installation length and reduce the requirements for the installation space; the lifting knob assembly of the invention solves the problem of misoperation on the basis of retaining the pressure-holding detection function.

[0064] In this embodiment, by internally installing an independent over-current component 10 inside the gas self-closing valve body 1, effective sealing is ensured after cutting off; the problem that the automatic closing function of the self-closing valve is shielded due to the user forcibly lifting and fixing the lifting knob 3 is solved, effectively preventing situations such as poisoning, explosion, and forced gas use caused by human operation of gas leakage.

[0065] In a specific embodiment, the lifting knob assembly includes: a lifting knob 3 and a lifting knob cap 4; a lifting opening 4-4 is provided on the inner wall of the lifting knob 3; the lifting knob cap 4 is connected to the top end of the pull rod 5 of the diaphragm assembly in the pressure regulating assembly; the top of the lifting knob cap 4 is conveniently placed inside the lifting knob 3; a thin-wall step 3-4 is provided on the side edge of the top of the lifting knob cap 4, and the lifting knob 3 moves the thin-wall step 3-4 through the lifting opening 4-4 to drive the lifting knob cap 4 to move, so as to drive the pull rod 5 to move by the lifting knob cap 4.

[0066] In this embodiment, by rotating the lifting knob cap 4, the lifting opening 4-4 can be stuck inside the thin-wall step 3-4. At this time, lifting the lifting knob cap 4 can drive the lifting knob 3 to move upward; when rotating the lifting knob cap 4 to separate the lifting opening 4-4 from the thin-wall step 3-4, at this time, lifting the lifting knob cap 4 cannot drive the lifting knob 3 to move upward.

[0067] Further, in this embodiment, see Figure 6 、 Figure 7As shown, two symmetrical lifting openings 4-4 are provided at the upper end of the lifting knob 3, and a circumferential thin-wall step 3-4 is provided on the lifting knob cap 4. There are two types of lifting knob assemblies of existing self-closing valves on the market: one is that the lifting knob cap 4 presses on the upper end of the lifting knob 3. When performing indoor airtightness detection with this structure, the lifting knob cap 4 can be directly lifted to cause the self-closing valve to overpressure for pressure-holding detection. However, when the user usually opens the valve (the lifting knob 3 should be lifted), there is a certain probability of misoperation of lifting the lifting knob cap 4, resulting in certain misoperations and false repair reports, increasing the workload of the customer service. The other structure is that the lifting knob cap 4 is completely hidden inside the lifting knob 3, and it is impossible to directly lift the lifting knob cap 4 for detection in the valve-closed state, reducing the product function. This invention combines the two situations, hides the lifting knob cap 4 inside, reduces the probability of false repair reports, and at the same time is provided with a special lifting opening 4-4 and a thin-wall step 3-4. In special cases, it can be deliberately lifted for pressure-holding detection. The specific detection process belongs to the conventional detection means in this field, and no improvement has been made in this application.

[0068] In a specific embodiment, as Figure 1 、 Figure 2 shown, the overcurrent component 10 includes: an overcurrent retaining ring 1-1, an overcurrent spring 2-1, an umbrella frame 3-1, an overcurrent seat 4-1, an O-ring 5-1, and an umbrella-shaped overcurrent piece; the overcurrent retaining ring 1-1 is movably arranged in the valve cavity of the gas self-closing valve, one end of the overcurrent spring 2-1 is connected to the retaining ring, and the other end is connected to the umbrella frame 3-1. The overcurrent spring 2-1 has a force to push the retaining ring to move away from the umbrella frame 3-1; the overcurrent seat 4-1 is fixedly arranged in the air outlet of the gas self-closing valve body 1; the O-ring 5-1 is used to seal the gap between the overcurrent seat 4-1 and the inner wall of the air outlet; the umbrella frame 3-1 is inserted and fixed in the overcurrent seat 4-1; the umbrella-shaped overcurrent piece includes an overcurrent rod 6-1 and an umbrella-shaped piece 7-1; one end of the overcurrent rod 6-1 is fixedly connected to the overcurrent retaining ring 1-1, and the other end is fixedly connected to the umbrella-shaped piece 7-1; the overcurrent spring 2-1 is sleeved outside the overcurrent rod 6-1; the overcurrent rod 6-1 passes through the umbrella frame 3-1 and can slide in the umbrella frame 3-1; the umbrella-shaped piece 7-1 is located inside the umbrella frame 3-1; the reset component can push the umbrella-shaped piece 7-1 to move for resetting and ventilating the gas self-closing valve body 1; the umbrella-shaped piece 7-1 is used to reciprocate in the umbrella frame 3-1 with the change of the pressure in the valve cavity.

[0069] In this embodiment, the overcurrent retaining ring 1-1 is formed by processing copper material, and the umbrella-shaped piece 7-1 is injection-molded with plastic material. When the leakage amount is greater than the set value, the umbrella-shaped piece 7-1 moves towards the air outlet end under the pressure difference, overcoming the spring force, quickly inserts and holds in the inner hole of the overcurrent seat 4-1, and needs to be pressed by an external force to be reset; after the overcurrent is closed, it effectively plays a role in shutting off and sealing.

[0070] In a specific embodiment, the pressure regulating assembly includes: a magnetic ring assembly, a diaphragm assembly, a knob assembly, and a piston assembly; the diaphragm assembly is disposed inside the gas self-closing valve body 1 and is used to divide the interior of the gas self-closing valve body 1 into a valve chamber and a pressure regulating chamber; the knob assembly is connected to the diaphragm assembly and is used to drive the diaphragm assembly to move up and down; the bottom end of the diaphragm assembly is magnetically attracted to the magnetic ring assembly, and the magnetic ring assembly is drivingly connected to the piston assembly; after the magnetic ring assembly is magnetically attracted, it drives the piston assembly to close the air inlet of the gas self-closing valve body 1.

[0071] In a specific embodiment, the magnetic ring assembly includes: a flat head screw 1-2, a magnetic ring 13, a magnet wrapper 3-2, a slider 12 with an inclined groove, and a magnetic attraction bracket 4-2; the magnetic attraction bracket 4-2 is fixedly disposed inside the gas self-closing valve body 1; the magnet wrapper 3-2 is wrapped outside the magnetic ring 13; the magnetic ring 13 is magnetically attracted to the magnetic attraction bracket 4-2; the slider 12 passes through the magnetic attraction bracket 4-2 and is slidably engaged with the magnetic attraction bracket 4-2; the flat head screw 1-2 passes through the magnetic ring 13 and is fixedly connected to the slider 12; during the process of the magnetic ring 13 magnetically attracting the magnetic attraction bracket 4-2, it drives the slider to move downward, and the slider 12 drives the piston assembly to open or close the air inlet of the gas self-closing valve body 1 through the inclined groove.

[0072] In this embodiment, the magnetic attraction bracket 4-2 is made of a metal material that can be magnetically attracted by the magnetic ring 13.

[0073] In this embodiment, as Figure 4 shown, the magnetic ring assembly is composed of a flat head screw 1-2, a magnetic ring 13, and a magnet wrapper 3-2. Compared with the magnet assembly used in the existing self-closing valve, the magnetic ring 13 structure does not require processing the screw tapered counterbore of the conventional magnet, reducing the processing difficulty and the surface treatment difficulty. At the same time, it improves the utilization rate of raw materials and reduces costs; by using the flat head screw 1-2, the air gap between the upper end pull rod 5 and the magnetic ring 13 is controlled, thereby accurately controlling the suction force between the two.

[0074] In a specific embodiment, the diaphragm assembly includes: a pull rod 5, a diaphragm pressing piece 2-3, a flat washer 3-3, and a diaphragm 2; the diaphragm 2 is disposed inside the gas self-closing valve body 1 for dividing the interior of the gas self-closing valve body 1 into a valve chamber and a pressure regulating chamber; the knob assembly is connected to the pull rod 5, the pull rod 5 passes through the diaphragm 2, and is fixedly connected to the diaphragm 2 through the flat washer 3-3; the bottom end of the pull rod 5 is magnetically attracted to the magnetic ring assembly.

[0075] In this embodiment, see Figure 5As shown, the diaphragm assembly consists of a pull rod 5, a diaphragm pressing piece 2-3, a flat washer 3-3, and a diaphragm 2. The pull rod 5 is provided with a snap-type limiting step. At the same time, the standard parts of the diaphragm pressing piece 2-3 and the flat washer 3-3 are used in combination to realize the pressing and automatic assembly of the diaphragm 2, playing the roles of reliable sealing and loosening prevention, with lower cost, higher installation efficiency, and stable and consistent assembly state compared with customized parts.

[0076] In a specific embodiment, as Figure 1 shown, the piston assembly includes: a piston rod 14, a guide block, and a gasket 15; the piston rod 14 penetrates through the air inlet of the gas self-closing valve body 1 and can slide within the air inlet; one end of the piston rod 14 located outside the air inlet is connected to the gasket 15, and the end located within the valve cavity is a free end; the slider 12 is slidably arranged in the valve cavity through a slider positioning seat 11; the guide block is fixed on the side wall of the piston rod 14, and the guide block is located within the inclined slot of the slider 12. The up-and-down movement of the slider 12 can drive the guide block to drive the piston rod 14 to move left and right.

[0077] In this embodiment, as the slider 12 moves up and down, the slider 12 drives the guide block to slide within the inclined slot of the slider 12. It should be noted that the assembly direction of the guide block is adapted to the opening direction of the inclined slot. When the slider 12 is slid, under the drive of the inclined slot, the horizontal displacement of the guide block changes. At this time, since the piston rod 14 is slidably arranged in the valve cavity and the sliding direction is coaxial with the air inlet of the gas self-closing valve body, the piston rod 14 will not move in the vertical direction. Therefore, under the drive of the guide block, the piston rod 14 can slide left and right along the axis direction of the air inlet within the valve cavity. The above transmission method is a conventional transmission method in the field of gas self-closing valves, and no improvement has been made to it in this application.

[0078] In a specific embodiment, as Figure 13 shown, a U-shaped clearance groove 17 is opened at the free end of the piston rod 14, and the U-shaped clearance groove 17 is used to avoid the overcurrent blocking ring 1-1. The piston rod 14 is provided with a U-shaped clearance groove 17 to avoid movement interference and affect the overcurrent cut-off parameters.

[0079] In a specific embodiment, as Figure 1As shown in the figure, the reset assembly includes: a knob 6, a valve stem 7, and a ball core 9; the ball core 9 is placed in the outlet pipe of the gas self-closing valve body 1 and can rotate in the outlet pipe. A channel is provided on the ball core 9 for connecting or disconnecting the outlet pipe; the valve stem 7 is fixedly connected to the ball core 9, the knob 6 is fixedly connected to the valve stem 7, and the knob 6 can drive the valve stem 7 to rotate, thereby driving the ball core 9 to rotate in the outlet pipe; the valve stem 7 is sealingly and rotatably connected to the gas self-closing valve body 1; by rotating the ball core 9, the side wall of the ball core 9 can squeeze the top of the umbrella-shaped piece, so that the umbrella-shaped piece is separated from the over-current seat 4-1, so as to complete the reset of the over-current assembly 10.

[0080] In a specific embodiment, as Figure 1 shown, it further includes: a tail joint 8; the tail joint 8 is sealingly connected to the right end of the gas self-closing valve body 1; a filter screen 16 is provided in the air inlet of the gas self-closing valve body 1.

[0081] See Figure 8 shown, when the gas system pipeline pressure is normal, lift the knob 3 of the self-closing valve body, drive the magnetic ring assembly to move upward, so that under the combined action of the inclined groove of the slider 12 and the guiding block of the piston rod 14, Figure 8 from a perspective, the piston rod 14 moves to the left, driving the sealing gasket 15 to separate from the air inlet of the gas self-closing valve body 1, and opening the air inlet of the self-closing valve, and the gas flows normally; the filter screen 16 installed at the air inlet end plays a role in filtering, rectifying and controlling the rated flow of the self-closing valve.

[0082] See Figure 9 shown, when the gas system pipeline pressure drops and is lower than the set value, the supporting force of the gas pressure on the diaphragm 2 is less than the suction force of the magnet in the magnetic ring assembly on the lower magnetic attraction frame 4-2, and the balance is broken. The magnet of the magnetic ring assembly quickly attracts and combines on the magnetic attraction frame 4-2. Under the combined action of the inclined groove of the slider 12 and the guiding block of the piston rod 14, Figure 9 from a perspective, the piston rod 14 moves to the right, driving the sealing gasket 15 to be in close contact and seal with the air inlet of the gas self-closing valve body 1. At this time, the air inlet of the gas self-closing valve body 1 is closed, cutting off the gas source. At this time, the over-current assembly 10 is normally opened under the action of the force of the over-current spring 2-1. The piston rod 14 is provided with a U-shaped clearance groove 17 to avoid movement interference and affect the over-current cut-off parameters.

[0083] See Figure 10 shown, when the gas system pipeline pressure rises abnormally and is higher than the set value, the supporting force of the gas pressure on the diaphragm 2 is greater than the suction force of the magnet in the magnetic ring assembly on the bottom end of the pull rod 5. The pull rod 5 is separated from the magnetic ring assembly, and then the magnetic ring assembly quickly attracts and combines on the metal part. The magnetic ring assembly quickly drives the slider 12 to move downward. Under the combined action of the inclined groove of the slider 12 and the guiding block of the piston rod 14,Figure 10 Taking this as the perspective, the piston rod 14 moves to the right, driving the gasket 15 to closely contact and seal the air inlet of the gas self-closing valve body 1. At this time, the air inlet of the gas self-closing valve body 1 is closed, cutting off the gas source; at this time, the air inlet of the gas self-closing valve body is closed, cutting off the gas source.

[0084] See Figure 11 、 12 As shown in the figure, when there is a leakage in the gas system pipeline at the rear end of the self-closing valve, it causes an increase in the pressure difference between the front and rear of the gas system pipeline, that is, the pressure in the valve cavity is greater than the pressure of the gas system pipeline at the rear end of the self-closing valve. When the set value is reached, the pressure difference force will overcome the elastic force of the overcurrent spring 2-1, and the umbrella-shaped overcurrent piece will move quickly and be embedded and held in the inner hole of the overcurrent seat 4-1. At this time, the umbrella-shaped overcurrent piece is stuck in the inner hole of the overcurrent seat 4-1, thereby quickly cutting off the gas source and ensuring good sealing.

[0085] After troubleshooting the abnormality, by rotating the knob 6 to drive the ball core 9 to rotate. There is a channel on the ball core 9. Therefore, the outer shape of the ball core 9 is a spherical object, flat on both sides. Therefore, the position of the channel of the ball core 9 will not contact the umbrella-shaped piece 7-1 in the umbrella-shaped overcurrent piece. When rotating the ball core 9, the position on the side wall of the ball core 9 without a channel will abut against the right end point of the umbrella-shaped piece 7-1. At this time, the side wall of the ball core 9 where the channel is opened will squeeze the end of the umbrella-shaped overcurrent piece due to structural interference, causing the pressed umbrella-shaped overcurrent piece to quickly retreat and reset. Before the abnormality is lifted, rotating the knob 6 to close the ball valve to cut off the gas source or after opening the ball valve again, the overcurrent assembly 10 will still quickly overcurrent and close, ensuring the safety of the rear end.

[0086] Even in special cases, if someone forcibly restricts and fixes the lifting knob 3 to the top, making the diaphragm assembly of the self-closing valve unable to fall back, and the valve opening is always open and cannot be closed; however, the overcurrent assembly 10 works independently without being restricted, and its overcurrent cutting function is not easily affected by human destruction or interference inside; therefore, even if someone destroys it or forcibly uses gas, the independently working overcurrent assembly 10 provided by the technical solution of the present invention can still effectively close the gas and effectively play a safety protection role.

[0087] Adopting the technical solution of this application: the pressure protection mechanism and the flow protection mechanism of the self-closing valve act independently without interference, and good sealing effect can be achieved after overcurrent closing; by setting the independently working overcurrent assembly 10, it is possible to prevent the safety function of the self-closing valve from being damaged by humans in special cases. Even if the lifting knob 3 mechanism is forcibly fixed, it can still effectively achieve overcurrent automatic closing, cut off the gas source, and prevent potential hazards such as poisoning and explosion; by placing the knob cap 4 inside the lifting knob 3, on the premise of retaining the pressure-holding detection of airtightness, the problem of misoperation and false repair reports is solved.

[0088] As described above, it is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. The substitution may be the substitution of some structures, devices, method steps, or a complete technical solution. Any equivalent substitution or change made according to the technical solution of the present utility model and its inventive concept shall be covered within the protection scope of the present utility model.

Claims

1. A gas self-closing valve with independent safety functions and anti-destruction, comprising: A gas self-closing valve body (1); characterized in that a pressure regulating component, a flow component (10), and a reset component are arranged in the gas self-closing valve body (1); the pressure regulating component and the flow component (10) are arranged independently; The pressure regulating component is movably arranged in the gas self-closing valve body (1), and reciprocates with the change of the pressure in the valve cavity, and is used to close the gas inlet of the gas self-closing valve body (1) when the valve cavity is over-pressured or under-pressured; The flow component (10) is movably arranged at the gas outlet of the gas self-closing valve body (1) and is used to block the gas outlet of the gas self-closing valve body (1) when the valve cavity pressure is overpressure; The reset component is sealingly rotatably arranged on the gas self-closing valve body (1) and extends into the gas self-closing valve body (1). The reset component is used to drive the flow-through component (10) to reset.

2. The gas self-closing valve with independent safety function and anti-destruction according to claim 1, characterized in that: It also includes a lifting button assembly, which includes: a lifting button (3), a lifting button cap (4); The lifting button (3) is connected to the top end of the pressure regulating assembly, and the top end of the lifting button cap (4) is placed inside the lifting button (3) and is locked; the lifting button (3) is used to drive the lifting button cap (4) to move, thereby driving the pressure regulating assembly to move to complete the resetting of the gas self-closing valve body (1).

3. The gas self-closing valve with independent safety function and anti-destruction according to claim 2, characterized in that: A lifting opening (4-4) is provided on the inner wall of the lifting button (3); a thin-walled step (3-4) is provided on the top side edge of the lifting button cap (4); the lifting button (3) lifts the thin-walled step (3-4) through the lifting opening (4-4) to move, thereby driving the lifting button cap (4) to move, so as to drive the pressure regulating component to move and complete the resetting of the gas self-closing valve body (1).

4. The gas self-closing valve with independent safety function and anti-destruction according to claim 2, characterized in that: The flow component (10) comprises: a flow blocking ring (1-1), a flow spring (2-1), an umbrella frame (3-1), a flow seat (4-1), an O-ring (5-1), and an umbrella-shaped flow sheet; The flow-blocking ring (1-1) is movably arranged in the valve cavity of the gas self-closing valve, one end of the flow-blocking spring (2-1) is connected to the flow-blocking ring, and the other end is connected to the umbrella frame (3-1), and the flow-blocking spring (2-1) has a force that pushes the flow-blocking ring to move in a direction away from the umbrella frame (3-1); The flow seat (4-1) is fixedly arranged in the gas outlet of the gas self-closing valve body (1); the O-ring (5-1) is used to seal the gap between the flow seat (4-1) and the inner wall of the gas outlet; the umbrella frame (3-1) is inserted and fixed in the flow seat (4-1); The umbrella-shaped flow sheet comprises a flow rod (6-1) and an umbrella-shaped sheet (7-1); one end of the flow rod (6-1) is fixedly connected to the flow baffle ring (1-1), and the other end is fixedly connected to the umbrella-shaped sheet (7-1); the flow spring (2-1) is sleeved on the outside of the flow rod (6-1); the flow rod (6-1) passes through the umbrella frame (3-1) and can slide inside the umbrella frame (3-1); the umbrella-shaped sheet (7-1) is located inside the umbrella frame (3-1); the reset component can push the umbrella-shaped sheet (7-1) to move so as to reset and ventilate the gas self-closing valve body (1); The umbrella-shaped piece (7-1) is used to move back and forth in the umbrella frame (3-1) as the pressure in the valve cavity changes.

5. The gas self-closing valve with independent safety function and anti-destruction according to claim 4, characterized in that: The pressure regulating assembly comprises: a magnetic ring assembly, a diaphragm assembly, and a piston assembly; The membrane assembly is arranged inside the gas self-closing valve body (1) and is used to separate the inside of the gas self-closing valve body (1) into a valve chamber and a pressure regulating chamber; The lifting button assembly is connected to the diaphragm assembly and is used to drive the diaphragm assembly to move up and down; the bottom end of the diaphragm assembly is magnetically attracted to the magnetic ring assembly, and the magnetic ring assembly is drivingly connected to the piston assembly; after the magnetic ring assembly is magnetically attracted, the piston assembly is driven to close the air inlet of the gas self-closing valve body (1).

6. The gas self-closing valve with independent safety function and anti-destruction according to claim 5, characterized in that: The magnetic ring assembly comprises: a flat head screw (1-2), a magnetic ring (13), a magnet package sheet (3-2), a slider with an inclined groove (12), and a magnetic suction frame (4-2); The magnetic frame (4-2) is fixedly arranged inside the gas self-closing valve body (1); the magnet package sheet (3-2) is arranged to cover the outside of the magnetic ring (13); the magnetic ring (13) and the magnetic frame (4-2) are magnetically attracted; the slider (12) passes through the magnetic frame (4-2) and is slidably matched with the magnetic frame (4-2); the flat head screw (1-2) passes through the magnetic ring (13) and is fixedly connected to the slider (12); During the process of the magnetic ring (13) magnetically attracting the magnetic attraction frame (4-2), the slider (12) is driven to move downward, and the piston assembly is driven by the inclined groove to open or close the air inlet of the gas self-closing valve body (1).

7. The gas self-closing valve with independent safety function and anti-destruction according to claim 5, characterized in that: The membrane assembly comprises: a pull rod (5), a membrane pressing sheet (2-3), a flat washer (3-3), and a membrane (2); The membrane (2) is arranged inside the gas self-closing valve body (1) to separate the inside of the gas self-closing valve body (1) into a valve chamber and a pressure regulating chamber; the button assembly is connected to the pull rod (5), the pull rod (5) passes through the membrane (2) and is fixedly connected to the membrane (2) through the flat washer (3-3); the bottom end of the pull rod (5) is magnetically attracted to the magnetic ring assembly; The lifting button (3) is connected to the pulling rod (5).

8. The gas self-closing valve with independent safety function and anti-destruction according to claim 6, characterized in that: The piston assembly comprises: a piston rod (14), a guide block, and a sealing gasket (15); The piston rod (14) passes through the air inlet of the gas self-closing valve body (1) and can slide in the air inlet; one end of the piston rod (14) located outside the air inlet is connected to the sealing gasket (15), and the other end located in the valve cavity is a free end; The slider (12) is slidably arranged in the valve cavity through a slider positioning seat (11); the guide block is fixed to the side wall of the piston rod (14), and the guide block is located in the inclined groove of the slider (12); the slider (12) moves up and down to drive the guide block to drive the piston rod (14) to move left and right.

9. The gas self-closing valve with independent safety function and anti-destruction according to claim 8, characterized in that: A U-shaped avoidance groove (17) is provided at the free end of the piston rod (14), and the U-shaped avoidance groove (17) is used to avoid the flow-through retaining ring (1-1).

10. The gas self-closing valve with independent safety function and anti-destruction according to claim 9, characterized in that: Also includes: a tail connector (8); The tail joint (8) is sealingly connected to the right end of the gas self-closing valve body (1); A filter screen (16) is arranged in the air inlet of the gas self-closing valve body (1); The reset assembly comprises: a knob (6), a valve stem (7), and a ball core (9); The ball core (9) is placed in the gas outlet pipe of the gas self-closing valve body (1) and can rotate in the gas outlet pipe. A channel is provided on the ball core (9) for connecting or disconnecting the gas outlet pipe. The valve stem (7) is fixedly connected to the ball core (9). The knob (6) is fixedly connected to the valve stem (7). The knob (6) can drive the valve stem (7) to rotate, thereby driving the ball core (9) to rotate in the gas outlet pipe. The valve stem (7) is sealingly and rotatably connected to the gas self-closing valve body (1); The spherical core (9) is rotated so that the side wall of the spherical core (9) presses the top of the umbrella-shaped piece (7-1) to separate the umbrella-shaped piece (7-1) from the flow-through seat (4-1), thereby completing the resetting of the flow-through component (10).

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