A leak-proof gas timed self-closing valve

Abstract

The present invention discloses a leak-proof gas timing self-closing valve, which relates to the technical field of self-closing valves, including a valve body, and also including: an outlet pipe, one end of which extends to the inside of the valve body, and the outlet pipe and the valve body are an integrated structure; an anti-slip structure, which includes a first semi-cylinder, a second semi-cylinder, two variable diameter wheels, two coil springs and two rotating shafts, the first semi-cylinder and the second semi-cylinder are combined into a cylinder sleeve arranged on the outlet pipe, and both sides of the first semi-cylinder and the second semi-cylinder that are mutually attached are provided with a locking structure for locking the two, the outer side of the outlet pipe is provided with a third limiting ring that is coaxially arranged and is an integrated structure, the third limiting ring is arranged in the first semi-cylinder and the second semi-cylinder, the first semi-cylinder and the second semi-cylinder are both provided with depressions, and the inner walls on both sides of the two depressions are provided with rotating holes. The present invention can prevent the gas delivery hose from falling off and achieve leak prevention.

Description

Technical Field

[0001] The invention relates to the technical field of self-closing valves, in particular to a leakage-proof gas timing self-closing valve. Background Art

[0002] The pipeline gas self-closing valve, referred to as the self-closing valve, is installed on the pipeline of the low-pressure gas system. When the pipeline gas supply pressure is under-pressure or over-pressure, it can automatically close without electricity or other external power and must be opened manually.

[0003] After searching, the Chinese patent with publication number CN116624628A discloses a new type of automatic protection mechanism for household pipeline gas, which belongs to the field of valve technology. Its technical points are: including a timing cut-off valve, a high-temperature self-closing valve and a ball valve, and also including: the timing cut-off valve includes a cut-off valve air inlet end, a sealing valve, a timing button assembly, a pressure-sensitive diaphragm, a brake valve block, a flow channel and a pressure diffuser, the cut-off valve air inlet end is connected to the gas pipeline outlet end, the timing button assembly is connected to the sealing valve, the brake valve block is connected to the timing button assembly, and the outlet end is provided with a flow channel, and the flow channel is connected to the pressure diffuser; the pressure-sensitive diaphragm is used to seal and isolate the high and low pressure cavities at the top of the cut-off valve; and the high-temperature self-closing valve includes a high-temperature self-closing valve body, an overflow valve and a self-closing valve stem assembly, the timing cut-off valve outlet end is connected to the high-temperature self-closing valve body, and the high-temperature self-closing valve outlet end is connected to the ball valve inlet, which has the advantages of pure mechanical and physical formula, no electronic components, and greatly improved safety and reliability of the gas self-closing valve.

[0004] However, the above invention has the following shortcomings: the air inlet pipe of the above-mentioned self-closing valve is a hexagon socket bolt, the air inlet pipe is used to connect with the natural gas pipe, the air outlet pipe of the self-closing valve is a sleeve (domestic gas stoves generally use a hose to be sleeved on the air outlet pipe of the self-closing valve), the connecting hose is sleeved on the outside of the sleeve, and then locked with a locking ring. When the gas is over-pressured, the self-closing valve is closed. If the self-closing valve is frequently started or not closed in time, the fit between the air outlet pipe of the self-closing valve and the sleeve is reduced, thereby detaching and leaking. Summary of the invention

[0005] The purpose of the present invention is to provide a leakage-proof gas timed self-closing valve to solve the problems raised in the above-mentioned background technology.

[0006] The technical solution of the present invention is: a leakage-proof gas timed self-closing valve, comprising a valve body, and also comprising:

[0007] An air outlet pipe, one end of which extends to the interior of the valve body, and the air outlet pipe and the valve body are an integral structure;

[0008] The anti-slip structure comprises a first semi-cylinder, a second semi-cylinder, two variable diameter wheels, two coil springs and two rotating shafts, the first semi-cylinder and the second semi-cylinder are combined into a cylinder sleeve arranged on the air outlet pipe, and the first semi-cylinder and the second semi-cylinder are respectively provided with a locking structure for locking the two on both sides of which the first semi-cylinder and the second semi-cylinder are in contact with each other, the outer side of the air outlet pipe is provided with a third limiting ring which is coaxially arranged therewith and is an integral structure, the third limiting ring is arranged in the first semi-cylinder and the second semi-cylinder, the interior of the first semi-cylinder and the second semi-cylinder are both provided with recesses, and the inner walls on both sides of the two recesses are provided with rotating holes, the outer sides of the two rotating shafts are respectively rotatably installed in the rotating holes of the two recesses, the two variable diameter wheels are respectively fixed to the two rotating shafts, one end of the two coil springs is respectively fixed on the rotating shafts, and the other ends of the two coil springs are respectively fixed on the first semi-cylinder and the second semi-cylinder.

[0009] Preferably, the locking structure includes a rotating block, an externally threaded rod, an internally threaded cylinder, a force-bearing rod and a force-bearing plate. A recess is provided on the outer side of the second semi-cylinder, and the rotating block is rotatably installed in the recess. The force-bearing plate and the first semi-cylinder are an integral structure. A bayonet is provided on the outer side of the force-bearing plate. One end of the externally threaded rod is fixed on the rotating block, and the interior of the internally threaded cylinder is installed on the externally threaded rod through threads, and the force-bearing rod is fixed to the internally threaded cylinder.

[0010] Preferably, an air intake pipe integrally formed with the valve body is provided on one side of the valve body, and one end of the air intake pipe extends into the valve body.

[0011] Preferably, a ball valve is installed on one end of the air inlet pipe.

[0012] Preferably, a limiting body is arranged inside the air intake pipe, and the limiting body is a hollow cylinder. The limiting body and the air intake pipe are clearance-matched and the two are coaxially arranged. A first valve flap is arranged inside one end of the air intake pipe located at the valve body, and the limiting body is located between the first valve flap and the ball flap of the ball valve, a second spring is arranged between the first valve flap and the limiting body, and both ends of the second spring are respectively in contact with the first valve flap and the limiting body, and a first sealing colloid is fixed to the outer side of the first valve flap.

[0013] Preferably, a second valve flap is provided inside the valve body, and a second limiting ring is provided on the outer side of one end of the outlet pipe located inside the valve body, which is an integral structure with the outlet pipe and coaxially arranged with the second valve flap, the second valve flap is coaxially arranged with the outlet pipe, and a third spring is sleeved on the outer side of the outlet pipe, the other end of the third spring is fixed to the second valve flap, and the other end of the third spring is in contact with the second limiting ring, and a second sealing colloid is fixed to the outer side of the second valve flap.

[0014] Preferably, a first valve cover is fixed to the top of the valve body, a first diaphragm is pressed at the fitting part between the first valve cover and the valve body, a first sliding hole is opened on the top of the first valve cover, a valve stem is slidably inserted in the interior of the first sliding hole, and the first diaphragm is slidably sleeved on the valve stem, a first clamping piece is arranged between the valve stem and the first diaphragm to fix the two, a first spring is sleeved on the outer side of the valve stem, two ends of the first spring are respectively in contact with the first clamping piece and the first valve cover, a cylindrical body coaxially arranged therewith is arranged inside the valve body, a second sliding hole is opened on the outer side of the cylindrical body, a first contact rod coaxially arranged therewith is fixed to the side of the first valve disc facing the cylindrical body, a second contact rod coaxially arranged therewith is fixed to the side of the second valve disc facing the cylindrical body, the first contact rod and the second contact rod are respectively slidably inserted in the two second sliding holes, and a cone coaxially arranged therewith and integrally arranged therewith is arranged at one end of the valve body located in the cylindrical body.

[0015] Preferably, a second valve cover is fixed to the bottom of the valve body, the second valve cover is fixed to the bottom of the valve body, a second diaphragm is pressed at the fitting portion between the second valve cover and the valve body, a timer and an electric push rod are fixedly installed to the bottom of the second valve cover, the electric push rod is electrically connected to the timer, the telescopic end of the electric push rod extends into the cylinder, the second diaphragm is sleeved on the telescopic end of the electric push rod, and a second clip is provided between the telescopic end of the electric push rod and the first diaphragm to fix the two.

[0016] Preferably, the top of the first valve cover is provided with a convex portion integrally formed therewith, a circular ring plate is fixed to the outer side of the convex portion, a pull cover is provided on the outer sliding sleeve of the convex portion, a table surface is provided at the bottom of the pull cover, and a force-bearing cover is fixed to the top end of the valve stem.

[0017] Preferably, one end of the first semi-cylinder and the second semi-cylinder are both provided with a spline groove, the outer side of the air outlet pipe is provided with a plurality of spline bodies integrally formed therewith, and the first semi-cylinder and the second semi-cylinder are both engaged with the spline body through the spline groove.

[0018] The present invention provides an anti-leakage gas timing self-closing valve through improvement, which has the following improvements and advantages compared with the prior art:

[0019] First, in the present invention, the existing gas hose is sleeved on the gas outlet pipe and locked on the gas outlet pipe with the existing locking ring, the first semi-cylinder and the second semi-cylinder are buckled on the gas hose, and the locking structure locks the first semi-cylinder and the second semi-cylinder. At this time, the reducing wheel in the first semi-cylinder and the reducing wheel in the second semi-cylinder are pressed into the recess, and the rotating shaft on the reducing wheel rewinds the coil spring. The rewinding force of the coil spring causes the reducing wheel on the gas hose. Under the condition of gas overpressure, the self-closing valve is closed. If the self-closing valve is frequently started or not closed in time, the gas impacts the gas hose, and the gas hose and the gas outlet pipe have a tendency to fall off. The reducing wheel rotates, the reducing wheel squeezes the gas hose, and the friction resistance between the gas hose and the gas outlet pipe increases, thereby preventing falling off and achieving leakage prevention.

[0020] Second: In the present invention, the air inlet pipe is connected with the natural gas supply pipe. When the gas pressure is normal, when the self-closing valve is normally started, the ball valve is opened, and the valve stem is manually pulled upward. The conical surface of the cone on the valve stem contacts the first contact rod and the second contact rod. The first contact rod pushes the first valve flap, the second spring is compressed, the second contact rod pushes the second valve flap, the third spring is compressed, but the second valve flap does not contact the air outlet pipe, the first valve flap cannot seal the air inlet pipe, the gas enters the valve body through the air inlet pipe, the gas fills the valve body, the gas arches the first diaphragm, the first spring is compressed and maintains a certain compression amount, and the self-closing valve is normally open; when the pressure is low, the first spring is reset, and the valve The rod moves down, and the second spring is compressed and reset, the first valve disc re-closes the air intake pipe, completing the under-pressure closure, and is manually opened when the gas pressure is restored; when over-pressure occurs, the first diaphragm continues to be arched, the first diaphragm pulls the valve stem upward, the cone moves upward with the valve stem, the cone continues to push the second contact rod, and the third spring is compressed until the second valve disc on the second contact rod blocks the air pipe, completing the over-pressure closure, and when the pressure gradually recovers, the self-closing valve automatically opens; compared with the traditional self-closing valve, the self-closing valve is a purely mechanical structure, and does not need to consider the insufficient adsorption force of the adsorption magnet of the traditional self-closing valve, and can automatically open when the over-pressure returns to normal pressure;

[0021] Third: In the present invention, the timer is used to set the time so that the electric push rod can be extended and retracted at a specified time. When the specified time comes, the electric push rod is extended, and the electric push rod lifts the cone, and the cone moves up with the valve stem. The cone continues to push the second contact rod, and the third spring is compressed until the second valve disc on the second contact rod blocks the trachea. It can be seen that the self-closing valve has the function of timed closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the anti-slip structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the internal structure of the anti-slip structure of the present invention;

[0027] Figure 5 is a cross-sectional view of the present invention;

[0028] Figure 6 is a cross-sectional view of the valve body of the present invention;

[0029] Figure 7 is a cross-sectional view of an air outlet pipe of the present invention;

[0030] Figure 8 for Figure 5 A is an enlarged structural diagram of FIG.

[0031] Reference numerals:

[0032] 1. Intake pipe; 2. Ball valve; 3. Valve body; 4. First valve cover; 5. Pull cover; 6. Force cover; 7. Anti-slip structure; 701. First semi-cylinder; 702. Coil spring; 703. Rotating shaft; 704. Second semi-cylinder; 705. Spline groove; 706. Internal thread cylinder; 707. Force rod; 708. External thread rod; 709. Notch; 710. Rotating block; 711. Variable diameter wheel; 712. Force plate; 8. Second valve cover; 9. Timer; 10. Electric push rod; 11. Valve stem; 12, first spring; 13, first diaphragm; 14, first clamping piece; 15, cylinder; 16, cone; 17, first valve flap; 18, second spring; 19, first sealing colloid; 20, second clamping piece; 21, second diaphragm; 22, limiting body; 23, second valve flap; 24, second sealing colloid; 25, third spring; 26, second limiting ring; 27, air outlet pipe; 28, third limiting ring; 29, second contact rod; 30, first contact rod; 31, circular ring plate. DETAILED DESCRIPTION

[0033] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention provides an anti-leakage gas timing self-closing valve through improvement. The technical solution of the present invention is:

[0035] like Figures 1 to 8 As shown, the embodiment of the present invention provides a leakage-proof gas timing self-closing valve, including a valve body 3. Here, it is supplemented that the valve body 3 is forged with 6061 aluminum alloy and subjected to T6 heat treatment, and a hot punching process is used to promote the recrystallization and grain refinement of the material to make it have higher strength, and also includes:

[0036] An air outlet pipe 27, one end of which extends to the interior of the valve body 3, and the air outlet pipe 27 and the valve body 3 are an integral structure;

[0037] The anti-slip structure 7 includes a first semi-cylinder 701, a second semi-cylinder 704, two diameter-changing wheels 711, two coil springs 702 and two rotating shafts 703. It is supplemented here that the curvature of the arc surface of the diameter-changing wheel 711 gradually increases, the first semi-cylinder 701 and the second semi-cylinder 704 are combined into a cylinder sleeve arranged on the outlet pipe 27, and the first semi-cylinder 701 and the second semi-cylinder 704 are provided with a locking structure for locking the two on both sides of the mutually fitting sides, and the outer side of the outlet pipe 27 is provided with a third limiter which is coaxially arranged and integrally structured therewith. Ring 28, the third limiting ring 28 is arranged in the first semi-cylinder 701 and the second semi-cylinder 704, the first semi-cylinder 701 and the second semi-cylinder 704 are both provided with depressions, the inner walls on both sides of the two depressions are provided with rotation holes, the outer sides of the two rotating shafts 703 are respectively rotatably installed in the rotation holes of the two depressions, the two reducing wheels 711 are respectively fixed to the two rotating shafts 703, one end of the two coil springs 702 is respectively fixed to the rotating shafts 703, and the other ends of the two coil springs 702 are respectively fixed to the first semi-cylinder 701 and the second semi-cylinder 704;

[0038] In the present invention, combined with the Figure 4 and Figure 5The existing gas hose is sleeved on the gas outlet pipe 27 and locked on the gas outlet pipe 27 with the existing locking ring, and the first semi-cylinder 701 and the second semi-cylinder 704 are buckled on the gas hose. The locking structure locks the first semi-cylinder 701 and the second semi-cylinder 704. At this time, the reducing wheel 711 in the first semi-cylinder 701 and the reducing wheel 711 in the second semi-cylinder 704 are pressed into the recess, and the rotating shaft 703 on the reducing wheel 711 rewinds the coil spring 702. The rewinding force of the coil spring 702 causes the reducing wheel 711 on the gas hose. Under the condition of gas overpressure, the self-closing valve is closed. If the self-closing valve is frequently started or not closed in time, the gas impacts the gas hose, and the gas hose and the gas outlet pipe 27 have a tendency to fall off. The reducing wheel 711 rotates, and the reducing wheel 711 squeezes the gas hose. The friction resistance between the gas hose and the gas outlet pipe 27 is increased, thereby preventing it from falling off and achieving leakage prevention.

[0039] Furthermore, the locking structure includes a rotating block 710, an externally threaded rod 708, an internally threaded barrel 706, a force rod 707 and a force plate 712. A notch 709 is provided on the outer side of the second semi-cylinder 704, the rotating block 710 is rotatably installed in the notch 709, the force plate 712 and the first semi-cylinder 701 are an integral structure, a bayonet is provided on the outer side of the force plate 712, one end of the externally threaded rod 708 is fixed on the rotating block 710, the inner part of the internally threaded barrel 706 is threadedly installed on the externally threaded rod 708, and the force rod 707 is fixed to the internally threaded barrel 706;

[0040] In the present invention, combined with the Figure 3 The rotating block 710 rotates upward, and the external threaded rod 708 on the rotating block 710 is stuck in the bayonet, forcing the force rod 707 to rotate. The force rod 707 drives the internal threaded cylinder 706 to rotate. The internal threaded cylinder 706 moves along the external threaded rod 708 through threaded transmission. The bottom of the internal threaded cylinder 706 squeezes the top of the force plate 712, so that the first semi-cylinder 701 and the second semi-cylinder 704 are squeezed against each other to complete the locking.

[0041] Furthermore, an air intake pipe 1 having an integral structure therewith is disposed on one side of the valve body 3, and one end of the air intake pipe 1 extends into the valve body 3;

[0042] In the present invention, combined with the Figure 7 It is additionally explained here that one end of the air intake pipe 1 is provided with a hexagonal screw head which is integrally formed with the air intake pipe 1 and has an internal thread.

[0043] Furthermore, a ball valve 2 is installed on one end of the air inlet pipe 1;

[0044] In the present invention, combined with the Figure 7 , ball valve 2 is used for opening and closing.

[0045] Furthermore, a limiting body 22 is arranged inside the air intake pipe 1, and the limiting body 22 is a hollow cylinder. The limiting body 22 and the air intake pipe 1 are clearance-matched and the two are coaxially arranged. A first valve flap 17 is arranged inside one end of the air intake pipe 1 located at the valve body 3, and the limiting body 22 is located between the first valve flap 17 and the ball flap of the ball valve 2. A second spring 18 is arranged between the first valve flap 17 and the limiting body 22, and the two ends of the second spring 18 are in contact with the first valve flap 17 and the limiting body 22 respectively. A first sealing colloid 19 is fixed to the outside of the first valve flap 17. Here, the first sealing colloid 19 is supplemented. The first sealing colloid 19 adopts a vulcanization process to improve the strength and hardness of the first sealing colloid 19, and at the same time improve the wear resistance, corrosion resistance and high temperature resistance of the first sealing colloid 19.

[0046] In the present invention, in the absence of external force, the second spring 18 remains in a compressed state, and the second spring 18 presses the first valve flap 17 , so that the first sealing colloid 19 of the first valve flap 17 presses one end of the intake pipe 1 , thereby sealing the intake pipe 1 .

[0047] Further, a second valve flap 23 is provided inside the valve body 3, and a second limiting ring 26 which is integrally structured with the outlet pipe 27 and coaxially arranged with the outlet pipe 27 is provided on the outer side of one end of the valve body 3. The second valve flap 23 is coaxially arranged with the outlet pipe, and a third spring 25 is sleeved on the outer side of the outlet pipe 27. The other end of the third spring 25 is fixed to the second valve flap 23, and the other end of the third spring 25 is in contact with the second limiting ring 26. A second sealing colloid 24 is fixed to the outer side of the second valve flap 23. Here, the second sealing colloid 24 is supplemented. The second sealing colloid 24 adopts a vulcanization process to improve the strength and hardness of the second sealing colloid 24, and at the same time improve the wear resistance, corrosion resistance and high temperature resistance of the first sealing colloid 19.

[0048] In the present invention, in the absence of external force, the third spring 25 remains in a compressed state, and the third spring 25 keeps the second valve flap 23 away from the air outlet pipe 27 .

[0049] Furthermore, a first valve cover 4 is fixed to the top of the valve body 3, a first diaphragm 13 is pressed tightly at the fitting portion between the first valve cover 4 and the valve body 3, a first sliding hole is opened on the top of the first valve cover 4, a valve stem 11 is slidably inserted inside the first sliding hole, and the first diaphragm 13 is slidably sleeved on the valve stem 11, the first diaphragm 13 adopts a vulcanization process to improve the strength and hardness of the first diaphragm 13, and at the same time improve the wear resistance, corrosion resistance and high temperature resistance of the first diaphragm 13, a first clamping piece 14 is arranged between the valve stem 11 and the first diaphragm 13 to fix the two, a first spring 12 is sleeved on the outer side of the valve stem 11, and the first diaphragm 13 is provided with a first spring 12. The two ends of a spring 12 are in contact with the first clamping piece 14 and the first valve cover 4 respectively. A cylindrical body 15 coaxially arranged therewith is arranged inside the valve body 3. The outer side of the cylindrical body 15 is provided with a second sliding hole. A first contact rod 30 coaxially arranged therewith is fixed to the side of the first valve flap 17 facing the cylindrical body 15. A second contact rod 29 coaxially arranged therewith is fixed to the side of the second valve flap 23 facing the cylindrical body 15. The first contact rod 30 and the second contact rod 29 are slidably inserted in the two second sliding holes respectively. A cone 16 coaxially arranged therewith and having an integral structure is arranged at one end of the valve body 3 located in the cylindrical body 15.

[0050] To supplement the above, the first contact rod 30 and the second contact rod 29 are both dome structures at one end of the cylindrical body 15 .

[0051] In the present invention, the air inlet pipe 1 is connected to the natural gas supply pipe. When the gas pressure is normal, when the self-closing valve is normally started, the ball valve 2 is opened, and the valve stem 11 is manually pulled upward. The conical surface of the cone 16 on the valve stem 11 contacts the first contact rod 30 and the second contact rod 29. The first contact rod 30 pushes the first valve flap 17, the second spring 18 is compressed, the second contact rod 29 pushes the second valve flap 23, the third spring 25 is compressed, but the second valve flap 23 does not contact the outlet pipe 27, the first valve flap 17 cannot seal the air inlet pipe 1, and the gas enters the valve body 3 through the air inlet pipe 1. The gas fills the valve body 3, and the gas arches the first diaphragm 13. A spring 12 is compressed and maintains a certain compression amount, and the self-closing valve is normally open; when the pressure is low, the first spring 12 is reset, the valve stem 11 moves downward, and the second spring 18 is compressed and reset, and the first valve flap 17 re-closes the intake pipe 1 to complete the under-pressure closure. When the gas pressure is restored, it is manually opened again; when the pressure is overpressure, the first diaphragm 13 is continued to be arched, the first diaphragm 13 pulls up the valve stem 11, and the cone 16 moves up with the valve stem 11. The cone 16 continues to push the second contact rod 29, and the third spring 25 is compressed until the second valve flap 23 on the second contact rod 29 blocks the air pipe 27, completing the over-pressure closure. When the pressure gradually recovers, the self-closing valve automatically opens.

[0052] Further, a second valve cover 8 is fixed to the bottom of the valve body 3, the second valve cover 8 is fixed to the bottom of the valve body 3, a second diaphragm 21 is pressed tightly at the fitting portion between the second valve cover 8 and the valve body 3, a timer 9 and an electric push rod 10 are fixedly installed to the bottom of the second valve cover 8, the electric push rod 10 is electrically connected to the timer 9, the telescopic end of the electric push rod 10 extends into the cylinder 15, the second diaphragm 21 is sleeved on the telescopic end of the electric push rod 10, and a second clamp 20 is provided between the telescopic end of the electric push rod 10 and the first diaphragm 13 to fix the two;

[0053] In the present invention, the timer 9 is used to set the time so that the electric push rod 10 can be extended and retracted at a fixed time. When the specified time is reached, the electric push rod 10 is extended, and the electric push rod 10 lifts the cone 16. The cone 16 moves up with the valve stem 11, and the cone 16 continues to push the second contact rod 29. The third spring 25 is compressed until the second valve flap 23 on the second contact rod 29 blocks the trachea 27.

[0054] Furthermore, the top of the first valve cover 4 is provided with a convex portion integrally formed therewith, a circular ring plate 31 is fixed to the outer side of the convex portion, a pull cover 5 is provided on the outer sliding sleeve of the convex portion, a table is provided at the bottom of the pull cover 5, and a force-bearing cover 6 is fixed to the top of the valve stem 11;

[0055] In the present invention, the pulling cover 5 is manually pulled, the pulling cover 5 contacts the stress cover 6, the stress cover 6 moves upward to pull the valve stem 11, the valve stem 11 and the pulling cover 5 contact the annular plate 31, thereby preventing the valve stem 11 from being over-pulled.

[0056] Furthermore, a spline groove 705 is provided at one end of the first semi-cylinder 701 and the second semi-cylinder 704 , and a plurality of spline bodies integrally formed with the air outlet pipe 27 are provided on the outer side thereof, and the first semi-cylinder 701 and the second semi-cylinder 704 are meshed with the spline bodies through the spline groove 705 .

[0057] Working principle: the existing gas hose is sleeved on the gas outlet pipe 27 and locked on the gas outlet pipe 27 with the existing locking ring, the first semi-cylinder 701 and the second semi-cylinder 704 are buckled on the gas hose, the rotating block 710 is rotated upward, the rotating block 710 is rotated upward, the external threaded rod 708 on the rotating block 710 is stuck in the bayonet, and a torsional force is applied to one end of the force plate 712, the force plate 712 drives the internal threaded cylinder 706 to rotate, and the internal threaded cylinder 706 moves along the external threaded rod 708 through the threaded transmission form, and the bottom of the internal threaded cylinder 706 squeezes the top of the force plate 712, so that the first semi-cylinder 701 and the second semi-cylinder 704 are squeezed against each other, completing the locking, so that the first semi-cylinder 701 and the second semi-cylinder 704 are squeezed against each other, completing the locking, and making the first semi-cylinder 701 and the second semi-cylinder 704 squeeze against each other. The half cylinder 701 and the second half cylinder 704 are pressed against each other to complete the locking. At this time, the reducing wheel 711 in the first half cylinder 701 and the reducing wheel 711 in the second half cylinder 704 are pressed into the depression. The rotating shaft 703 on the reducing wheel 711 rewinds the coil spring 702. The rewinding force of the coil spring 702 causes the reducing wheel 711 on the gas hose. Under the condition of gas overpressure, the self-closing valve is closed. If the self-closing valve is frequently started or not closed in time, the gas impacts the gas hose, and the gas hose and the gas outlet pipe 27 have a tendency to fall off. The reducing wheel 711 rotates, and the reducing wheel 711 squeezes the gas hose. The friction resistance between the gas hose and the gas outlet pipe 27 increases, thereby preventing it from falling off and achieving leakage prevention.

[0058] The working principle of the self-closing valve is that the air inlet pipe 1 is connected to the natural gas supply pipe. When the gas pressure is normal, when the self-closing valve is normally started, open the ball valve 2, manually pull the valve stem 11 upward, and the conical surface of the cone 16 on the valve stem 11 contacts the first contact rod 30 and the second contact rod 29. The first contact rod 30 pushes the first valve flap 17, the second spring 18 is compressed, the second contact rod 29 pushes the second valve flap 23, the third spring 25 is compressed, but the second valve flap 23 does not contact the outlet pipe 27, the first valve flap 17 cannot seal the air inlet pipe 1, and the gas enters the valve body 3 through the air inlet pipe 1. The gas fills the valve body 3 and the gas causes the first diaphragm 13 to arch , the first spring 12 is compressed and maintains a certain compression amount, and the self-closing valve is normally open; when the pressure is low, the first spring 12 is reset, the valve stem 11 moves down, and the second spring 18 is compressed and reset, and the first valve flap 17 re-closes the intake pipe 1 to complete the under-pressure closure. When the gas pressure is restored, it is manually opened again; when the pressure is overpressure, the first diaphragm 13 is continued to be arched, the first diaphragm 13 pulls up the valve stem 11, and the cone 16 moves up with the valve stem 11. The cone 16 continues to push the second contact rod 29, and the third spring 25 is compressed until the second valve flap 23 on the second contact rod 29 blocks the air pipe 27, completing the over-pressure closure. When the pressure gradually recovers, the self-closing valve automatically opens.

[0059] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas leakage prevention timed self-closing valve, comprising a valve body (3), characterized in that: Also includes: an air outlet pipe (27), one end of the air outlet pipe (27) extending into the interior of the valve body (3), and the air outlet pipe (27) and the valve body (3) forming an integral structure; The anti-slip structure (7) comprises a first semi-cylinder (701), a second semi-cylinder (704), two diameter-changing wheels (711), two coil springs (702) and two rotating shafts (703); the first semi-cylinder (701) and the second semi-cylinder (704) are combined into a cylinder sleeved on the air outlet pipe (27); both sides of the first semi-cylinder (701) and the second semi-cylinder (704) that are in contact with each other are provided with a locking structure for locking the two; the outer side of the air outlet pipe (27) is provided with a third limiting ring (28) that is coaxially arranged therewith and is an integral structure; the third limiting ring (28) ) is arranged in the first semi-cylinder (701) and the second semi-cylinder (704), the first semi-cylinder (701) and the second semi-cylinder (704) are both provided with recesses, the inner walls on both sides of the two recesses are provided with rotation holes, the outer sides of the two rotation shafts (703) are respectively rotatably mounted in the rotation holes of the two recesses, the two diameter-changing wheels (711) are respectively fixed to the two rotation shafts (703), one end of the two coil springs (702) are respectively fixed to the rotation shafts (703), and the other ends of the two coil springs (702) are respectively fixed to the first semi-cylinder (701) and the second semi-cylinder (704); A second valve cover (8) is fixed to the bottom of the valve body (3), the second valve cover (8) is fixed to the bottom of the valve body (3), a second diaphragm (21) is pressed against the fitting portion between the second valve cover (8) and the valve body (3), a timer (9) and an electric push rod (10) are fixedly mounted to the bottom of the second valve cover (8), the electric push rod (10) and the timer (9) are electrically connected, the telescopic end of the electric push rod (10) extends into the cylindrical body (15), the second diaphragm (21) is sleeved on the telescopic end of the electric push rod (10), and a second clamp (20) is provided between the telescopic end of the electric push rod (10) and the first diaphragm (13) to fix the two.

2. The anti-leakage gas timed self-closing valve according to claim 1, characterized in that: The locking structure comprises a rotating block (710), an externally threaded rod (708), an internally threaded cylinder (706), a force-bearing rod (707) and a force-bearing plate (712); a notch (709) is provided on the outer side of the second semi-cylinder (704); the rotating block (710) is rotatably mounted in the notch (709); the force-bearing plate (712) and the first semi-cylinder (701) are an integral structure; a bayonet is provided on the outer side of the force-bearing plate (712); one end of the externally threaded rod (708) is fixed to the rotating block (710); the interior of the internally threaded cylinder (706) is threadedly mounted on the externally threaded rod (708); and the force-bearing rod (707) is fixed to the internally threaded cylinder (706).

3. The anti-leakage gas timed self-closing valve according to claim 1, characterized in that: An air intake pipe (1) having an integral structure therewith is provided on one side of the valve body (3), and one end of the air intake pipe (1) extends into the valve body (3).

4. The anti-leakage gas timed self-closing valve according to claim 3, characterized in that: A ball valve (2) is installed on one end of the air intake pipe (1).

5. The anti-leakage gas timed self-closing valve according to claim 4, characterized in that: A limiting body (22) is arranged inside the air intake pipe (1), the limiting body (22) is a hollow cylinder, the limiting body (22) and the air intake pipe (1) are clearance-matched and the two are arranged coaxially, a first valve flap (17) is arranged inside one end of the air intake pipe (1) located at the valve body (3), and the limiting body (22) is located between the first valve flap (17) and the ball flap of the ball valve (2), a second spring (18) is arranged between the first valve flap (17) and the limiting body (22), two ends of the second spring (18) are in contact with the first valve flap (17) and the limiting body (22) respectively, and a first sealing colloid (19) is fixed to the outer side of the first valve flap (17).

6. The anti-leakage gas timed self-closing valve according to claim 5, characterized in that: A second valve flap (23) is arranged inside the valve body (3); a second limiting ring (26) which is integrally structured with the valve body and coaxially arranged with the second valve flap (23) is arranged coaxially with the valve body (3) on the outer side of one end of the air outlet pipe (27) located inside the valve body (3); the second valve flap (23) and the air outlet pipe are arranged coaxially; a third spring (25) is sleeved on the outer side of the air outlet pipe (27); the other end of the third spring (25) is fixed to the second valve flap (23); the other end of the third spring (25) is in contact with the second limiting ring (26); and a second sealing colloid (24) is fixed to the outer side of the second valve flap (23).

7. The anti-leakage gas timed self-closing valve according to claim 6, characterized in that: A first valve cover (4) is fixed on the top of the valve body (3); a first diaphragm (13) is pressed against a fitting portion between the first valve cover (4) and the valve body (3); a first sliding hole is opened on the top of the first valve cover (4); a valve stem (11) is slidably inserted into the interior of the first sliding hole; the first diaphragm (13) is slidably sleeved on the valve stem (11); a first clamping piece (14) is provided between the valve stem (11) and the first diaphragm (13) to fix the two; a first spring (12) is sleeved on the outer side of the valve stem (11); two ends of the first spring (12) are in contact with the first clamping piece (14) and the first valve cover (4), respectively. A cylindrical body (15) coaxially arranged therewith is arranged inside the valve body (3), and a second sliding hole is opened on the outer side of the cylindrical body (15); a first contact rod (30) coaxially arranged therewith is fixed on the side of the first valve flap (17) facing the cylindrical body (15), and a second contact rod (29) coaxially arranged therewith is fixed on the side of the second valve flap (23) facing the cylindrical body (15); the first contact rod (30) and the second contact rod (29) are slidably inserted in the two second sliding holes respectively, and a cone (16) coaxially arranged therewith and having an integral structure is arranged at one end of the valve body (3) located inside the cylindrical body (15).

8. The anti-leakage gas timed self-closing valve according to claim 7, characterized in that: The top of the first valve cover (4) is provided with a convex portion integrally formed therewith, a circular ring plate (31) is fixed to the outer side of the convex portion, a pull cover (5) is provided on the outer sliding sleeve of the convex portion, a table surface is provided at the bottom of the pull cover (5), and a force-bearing cover (6) is fixed to the top end of the valve stem (11).

9. The anti-leakage gas timed self-closing valve according to claim 1, characterized in that: A spline groove (705) is provided at one end of each of the first semi-cylinder (701) and the second semi-cylinder (704); a plurality of spline bodies integrally formed with the air outlet pipe (27) are provided on the outer side of the air outlet pipe (27); and the first semi-cylinder (701) and the second semi-cylinder (704) are meshed with the spline bodies via the spline groove (705).

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