Mechanical automatic control pipeline gas self-closing valve

Abstract

The mechanical automatic control pipeline gas self-closing valve comprises a flow controller arranged in the inside of the gas inlet chamber of a main valve body, a manual ball valve switch mechanism arranged in the gas outlet end of the main valve body, a threaded interface connected to the gas outlet end of the main valve body, a rubber valve plate arranged in the gas inlet side of the gas guide channel of the gas storage chamber and used for opening or closing the gas guide channel, a rubber valve plate driving mechanism connected to the side of the rubber valve plate close to the gas guide channel and used for driving the rubber valve plate to open or close the gas guide channel, and a starting control device vertically arranged in the gas storage chamber of the main valve body and penetrating through the upper cover arranged in the upper port of the main valve body, wherein the starting control device drives the rubber valve plate driving mechanism to drive the rubber valve plate through vertical movement and adjusts the pressure of the gas in the gas storage chamber. The automatic control mechanism is simplified, the production and assembly processes are reduced, the automatic closing action is more sensitive, reliable and accurate due to the simple structure, and the valve is safer and more reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to a pipeline gas self-closing valve. In particular, it relates to a mechanical automatic control pipeline gas self-closing valve. BACKGROUND

[0002] In order to solve the problem of environmental pollution, clean energy is vigorously promoted, and combustible gas is widely used as industrial and agricultural production and household fuel. Because combustible gas is flammable and explosive gas, improper management and use will cause disaster accidents.

[0003] In order to prevent gas leakage, the current market gas self-closing valve basically uses permanent magnet as automatic control power. In actual application, the constant attraction of permanent magnet is highlighted, which limits the application range of working conditions. When the gas pressure drops to the critical point during the gas use peak, the gas source will be automatically cut off, causing the illusion of universal gas stop, and causing the gas user and the gas company to be constantly changing. Because this design is not suitable for changes in working conditions, it will inevitably face elimination. At present, whether it is a magnetic control type or a mechanical type pipeline gas self-closing valve, the output range is limited to gas stoves and water heaters, which is not suitable for gas wall-hung boilers, causing safety hazards that cannot control all gas burners. In order to solve this problem, the design scheme needs to be changed according to the actual application conditions to make up for the lack of design.

[0004] Chinese utility model patent ZL2015207576467.9 gives a pipeline gas self-closing valve, a skin film is arranged at the upper end of the main valve body gas storage chamber, the skin film expands or retracts with the change of gas pressure in the gas storage chamber to drive the plunger arranged in the gas storage chamber to move up and down, control the axial movement of the valve plate in the main valve body, when the gas pressure is balanced, the valve plate is kept in the open state, when the pressure is less than the standard state, the gas source can be automatically cut off, when the flow is too large, the skin film retracts to the lowest, the valve plate will automatically cut off the gas source. In the time limit application, the plunger arranged in the gas storage chamber is limited by the turning angle and cannot automatically close the gas source when the pressure is too high, lacking the function of automatic closing under overpressure. Another utility model patent ZL201720173658.1 gives a pipeline gas self-closing valve, a sleeve is arranged at the center of the main valve body gas storage chamber, guide walls are connected at both ends of the sleeve, guide holes are arranged on the guide walls. The guide holes and the sleeve and the sleeve of the main valve body are cross-shaped and mutually penetrated, a normally open valve plate is arranged in the gas outlet passage of the gas inlet end of the main valve body, the guide shaft of the normally open valve plate penetrates the guide hole and enters the sleeve, a normally closed valve plate is arranged at the port of the gas outlet passage of the main valve body, the guide shaft of the normally closed valve plate penetrates the guide hole and enters the sleeve. The normally closed valve plate and the normally open valve plate are controlled by the taper pull rod arranged in the sleeve, when the pull rod is pulled up, the conical surface of the pull rod pushes the normally closed valve plate to guide the gas passage, the skin film arranged at the upper end of the main valve body expands under the gas pressure to keep the normally closed valve plate under normal working conditions. When the gas pressure in the main valve body gas storage chamber is less than the rated pressure, the skin film at the upper end of the main valve body retracts to drive the pull rod to fall synchronously and separate from the normally closed valve plate to close the gas source. When the gas flow is greater than the rated range, the skin film retracts to drive the pull rod to fall synchronously and separate from the normally closed valve plate to close the gas source. When the gas pressure in the gas storage chamber is greater than the rated pressure, the skin film continues to expand to drive the pull rod to continue to rise and push the normally open valve plate to close the gas outlet passage, thereby enabling the pipeline gas self-closing valve to automatically close the gas source under overpressure, underpressure and excessive flow. Since the normally closed valve plate is still in the open state after closing under overpressure, there is still gas in the gas storage chamber, so the gas source cannot be completely closed. Therefore, another design scheme is needed to solve the adverse factors. Another utility model patent ZL201821645121.1 gives a mechanical pipeline gas self-closing valve, a central control bracket is arranged at the center of the main valve body gas storage chamber, a starting bracket is arranged in the central control bracket, a jack is arranged in the starting bracket, a pull rod is linked at the top end of the starting bracket, the pull rod is controlled by the skin film at the upper end of the main valve body, an inlet control valve plate is arranged in the gas passage between the main valve body gas storage chamber and the ball valve. The jack in the starting bracket is lifted to open the inlet control valve plate to guide the gas source, the skin film expands to keep the inlet control valve plate open. When the gas pressure in the gas storage chamber is less than the standard, the skin film retracts to drive the starting bracket to fall and the jack to separate from the inlet control valve plate to close the gas source.When the gas pressure inside the gas storage chamber exceeds the standard, the diaphragm continues to expand, causing the starting bracket to rise further, thus disengaging the jack from the inlet control valve plate and shutting off the gas supply. When the gas storage chamber depressurizes, the diaphragm retracts and returns to a stationary state. When the gas flow exceeds the rated range, the diaphragm retracts, causing the pull rod to fall synchronously, disengaging from the normally closed valve plate and shutting off the gas supply. This effectively achieves the function of automatically shutting off the gas supply in cases of overpressure, underpressure, and overcurrent. While this design solves some drawbacks of several gas pipeline self-closing valves, its complex structure and manufacturing process, coupled with the threaded connection between the pull rod and the starting bracket, and the use of an elastic material for the diaphragm with a sealed connection to the pull rod, mean that any deviation in the pull rod can cause the starting bracket to shift within the guide bracket, resulting in interference between the starting bracket and the guide bracket. Since the gas pressure is low, only 1-3 kPa, the interference-free flexibility of the starting bracket's vertical movement cannot be guaranteed. Therefore, a more reliable pipeline gas self-closing valve needs to be designed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a mechanical automatic control pipeline gas self-closing valve that is fully functional, simple in structure, adjustable according to gas consumption, suitable for different gas combustion appliances, safer, more reliable, more durable, and integrated with a gas ball valve.

[0006] The technical solution adopted in this invention is: a mechanical automatic control pipeline gas self-closing valve, comprising a main valve body forming a gas storage chamber in the middle, a flow controller disposed inside the gas inlet chamber of the main valve body, a manual ball valve switch mechanism disposed at the gas outlet end of the main valve body, a threaded interface connected to the gas outlet end of the main valve body, a rubber valve plate disposed on the gas inlet side of the gas guide channel of the gas storage chamber for opening or closing the gas guide channel, a rubber valve plate drive mechanism located inside the gas guide channel for driving the rubber valve plate to open or close the gas guide channel is connected to the side of the rubber valve plate adjacent to the gas guide channel, and a start control device vertically disposed in the gas storage chamber in the middle of the main valve body, the upper end of which penetrates through the upper end of the cover covering the upper port of the main valve body, the start control device controlling the drive of the rubber valve plate drive mechanism on the rubber valve plate and adjusting the pressure of the gas in the gas storage chamber by vertically moving up and down.

[0007] This invention discloses a mechanically automatic control gas pipeline self-closing valve, which simplifies the automatic control mechanism and reduces production and assembly processes. Due to its simple structure, the automatic closing action is more sensitive, reliable, and accurate, thus making it safer and more reliable. This invention has the following advantages.

[0008] 1. The present invention sets an air storage chamber between the air inlet and air outlet of the self-closing valve. A cylindrical pin is set at the bottom of the air storage chamber to ensure that the vertical movement of the starter rod is not interfered with by friction. This replaces the central control bracket, which simplifies the assembly process and saves labor costs.

[0009] 2, The starting rod of the present application replaces the complicated starting support, the point contact of the conical body at the lower end of the starting rod with the jack reduces the friction surface to the minimum point, the circular hole in the center of the starting rod matches the cylindrical pin in the gas storage warehouse without interference to keep the starting control device vertically lifting, and the control of the axial movement of the air inlet control device opens or closes the air inlet channel.

[0010] 3, The air inlet control device of the present application is composed of a jack, a torsion spring, a pin shaft, a guide rod, a rubber valve plate, a conical spring and a flow controller, the jack can only rotate downward under the action of the torsion spring, when the starting control device moves upward, the impact head of the jack moves backward along the conical body of the starting rod to guide the air source of the air inlet control device. When the starting control device moves downward, the impact head of the jack moves forward to close the air source of the air inlet control device. When the starting control device moves upward again and the jack is separated from the conical body, the air inlet control device moves forward to close the air source, under the action of the upward spring, the starting control device descends to touch the jack to rotate downward to separate from the conical body, and the jack is reset to the static state under the action of the torsion spring. This design scheme simply integrates the complicated multiple opening or closing actions of the self-closing valve.

[0011] 4, The central control device of the present application is extremely simple in design, and the control of opening or guiding the air source is more sensitive, stable and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the external structure diagram of the mechanical automatic control pipeline gas self-closing valve of the present application;

[0013] Figure 2 is the internal structure diagram of the mechanical automatic control pipeline gas self-closing valve of the present application;

[0014] Figure 3 is the exploded structure diagram of the mechanical automatic control pipeline gas self-closing valve of the present application;

[0015] Figure 4 is the three-dimensional structure diagram of the rubber valve plate driving part in the present application;

[0016] Figure 5 is the side structure diagram of the rubber valve plate driving part in the present application;

[0017] Figure 6 is the structure diagram of the rubber valve plate in the present application;

[0018] Figure 7 is the structure diagram of the jack in the present application;

[0019] Figure 8 is the exploded structure diagram of the rubber valve plate driving mechanism in the present application;

[0020] Figure 9 is the overall structure diagram of the rubber valve plate driving mechanism in the present application;

[0021] Figure 10 is the structure diagram of the main valve body in the present application;

[0022] Figure 11 is the internal structure diagram of the main valve body in the present application;

[0023] Figure 12 is the structure diagram of the touch start rod in the present application;

[0024] Figure 13 is the sectional view of the touch start rod in the present application;

[0025] Figure 14 is the structure diagram of the upper cover in the present application;

[0026] Figure 15 is the structure diagram of the adjusting gland in the present application;

[0027] Figure 16 is the sectional view of the adjusting gland in the present application;

[0028] Figure 17 is the structure diagram of the start pull knob in the present application;

[0029] Figure 18 is the sectional view of the start pull knob in the present application.

[0030] in the figure

[0031] 1: main valve body 1.1: gas storage chamber

[0032] 1.2: concave hole 1.3: balance lifting shoulder

[0033] 1.4: gas guide channel 1.5: gas inlet chamber

[0034] 1.6: ball valve cavity 2: jack

[0035] 2.1: touch head 2.2: lug

[0036] 2.3: shaft hole 3: cylindrical pin

[0037] 4: torsion spring 5: rubber valve plate driving part

[0038] 5.1: left balance arm 5.2: right balance arm

[0039] 5.3: upper guide arm 5.4: lower guide arm

[0040] 5.5: T-shaped shoulder 5.6: main shaft

[0041] 5.7: shaft hole flange 6: rubber valve plate

[0042] 6.1: connecting groove 6.2: conical spring embedding groove

[0043] 7: conical spring 8: flow controller

[0044] 9: guide post 10: touch start lever

[0045] 10.1: guide hole 10.2: conical body

[0046] 10.3: disc 10.4: screw rod

[0047] 11: skin film 12: tray

[0048] 13: nut 14: upper spring

[0049] 15: upper cover 15.1: internal thread

[0050] 15.2: hat brim 16: adjusting gland

[0051] 16.1: guide part 16.2: guide concave surface

[0052] 16.3: limit hook 16.4: external thread connecting part

[0053] 16.5: through hole 17: start pull knob

[0054] 17.1: pull knob main body 17.2: internal sleeve hole

[0055] 17.3: barb 17.4: key edge

[0056] 18: internal pull knob 19: sealing washer

[0057] 20: ball valve switch 21: threaded interface

[0058] 22: valve rod 23: sealing ring

[0059] 24: knob 25: round cap screw DETAILED DESCRIPTION

[0060] The mechanical automatic control pipeline gas self-closing valve is described in detail below in combination with the embodiments and the drawings.

[0061] The mechanical automatic control pipeline gas self-closing valve of the present application is provided with a manual ball valve at the gas outlet end of the main valve body, an intermediate gas storage chamber, and an air inlet chamber, forming a linear gas passage. A cylindrical pin and a starting rod are provided at the bottom end of the gas storage chamber. The screw rod of the starting rod is provided with a leather film, a tray, a nut, an upper spring, and an upper cover top hole. The starting pull button and the inner pull button are screwed together, forming a starting control device. A gas inlet control device is provided in the guide channel of the gas storage chamber and the air inlet chamber, which is composed of a jack, a torsion spring, a pin shaft, a guide rod, a rubber valve plate, a conical spring, and a flow controller. Pulling the starting pull button upward, the inner pull button starting rod rises synchronously, the conical body of the starting rod touches the jack and drives the gas inlet control device to move backward to guide the air source. The leather film expands or retracts with the change of air pressure, driving the starting control device to make vertical lifting movement. The conical body of the starting rod controls the axial reciprocating movement of the gas inlet control device in the air inlet passage. The leather film and the upper spring control the automatic closing action of overpressure, underpressure, and overcurrent with the fluctuation of the air pressure in the valve body.

[0062] As shown in Figure 1 , Figure 2 , Figure 3 , the mechanical automatic control pipeline gas self-closing valve of the present application comprises a main valve body 1 with a gas storage chamber 1.1 in the middle, a flow controller 8 provided in the air inlet chamber 1.5 of the main valve body 1, a manual ball valve switch mechanism provided at the gas outlet end of the main valve body 1, a threaded interface 21 connected to the gas outlet end of the main valve body 1, a rubber valve plate 6 provided at the air inlet side of the gas guide channel 1.4 of the gas storage chamber 1.1 for opening or closing the gas guide channel 1.4, and the rubber valve plate 6 is connected to the flow controller 8 through a conical spring 7. The side of the rubber valve plate 6 near the gas guide channel 1.4 is connected to a rubber valve plate driving mechanism located in the gas guide channel 1.4 for driving the rubber valve plate 6 to open or close the gas guide channel 1.4. A starting control device is vertically provided in the gas storage chamber 1.1 in the middle of the main valve body 1, which penetrates the upper cover 15 covering the upper port of the main valve body 1. The starting control device controls the driving of the rubber valve plate driving mechanism to the rubber valve plate 6 through vertical movement, and adjusts the pressure of the gas in the gas storage chamber 1.1.

[0063] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 11 , the manual ball valve switch mechanism comprises a sealing ring 19 assembled in the ball valve cavity 1.6 of the main valve body 1, a ball valve switch 20, a valve rod 22 connected to the ball valve switch 20 and extending from the cylindrical hole at the upper end of the ball valve cavity 1.6, a sealing ring 23 and a knob 24 sleeved on the valve rod 22, and a round cap screw 25 screwed and tightly fixed for manually opening or closing the valve.

[0064] As shown in Figure 2As shown, the rubber valve plate driving mechanism includes a rubber valve plate driving member 5 connected to the rubber valve plate 6 at one end to drive the rubber valve plate 6 to move horizontally to open or close the air passage 1.4, and a jack 2 connected to the other end of the rubber valve plate driving member 5 by a hinge, which is driven to rotate by the jack 2 to drive the rubber valve plate driving member 5 to move horizontally along the air passage 1.4 when the vertical movement of the control device is triggered, thereby driving the rubber valve plate 6 to move horizontally to open or close the air passage 1.4.

[0065] As shown in Figure 4 , Figure 5 , Figure 6 As shown, the rubber valve plate driving member 5 includes a main shaft 5.6, a T-shaped shoulder 5.5 integrally formed at one end of the main shaft 5.6 for embedding into the connecting groove 6.1 of the rubber valve plate 6, left and right balance arms 5.1 and 5.2 integrally formed on the left and right sides of the main shaft 5.6, respectively, upper and lower guide arms 5.3 and 5.4 integrally formed on the upper and lower sides of the main shaft 5.6, respectively, the connecting line of the upper and lower guide arms 5.3 and 5.4 being perpendicular to the connecting line of the left and right balance arms 5.1 and 5.2, respectively, and the left and right balance arms 5.1 and 5.2 being integrally connected with a shaft hole flange 5.7 for connecting with the jack 2 at the end away from the T-shaped shoulder 5.5, respectively, the length of the upper guide arm 5.3 being greater than that of the lower guide arm 5.4, so that the upper guide arm 5.3 limits the rotation angle of the jack 2 to a set angle.

[0066] The lower surfaces of the left and right balance arms 5.1 and 5.2 are in contact with the balance shoulder 1.3 at the air passage 1.4 port of the air storage chamber 1.1 of the main valve body 1, maintaining the balanced movement of the rubber valve plate driving member 5, and the left and right balance arms 5.1 and 5.2, the upper and lower guide arms 5.3 and 5.4 are centered on the main shaft 5.6, maintaining the reciprocating movement of the rubber valve plate driving member 5 along the air passage 1.4.

[0067] As shown in Figure 7 , Figure 8 , Figure 9As shown, the jack 2 includes a contact head 2.1 and two identical lugs 2.2 integrally formed on one side of the contact head 2.1, the two lugs 2.2 are formed with shaft holes 2.3, the jack 2 and the rubber valve plate driving member 5 are connected by a cylindrical pin 3 penetrating the shaft hole flange 5.7 in the rubber valve plate driving member 5 and the lug 2.2 in the jack 2, and a torsion spring 4 sleeved on the cylindrical pin 3, one end of the torsion spring 4 acts on the contact head 2.1, and the other end acts on the rubber valve plate driving member 5, only allowing the jack 2 to rotate downward, and the jack 2 is rotated after being swung and abuts against the upper guide arm 5.3, the contact head 2.1 in the jack 2 is touched during the vertical movement of the starting control device to make the jack 2 rotate, drive the rubber valve plate driving member 5 connected with the jack 2 to move horizontally along the air guide channel 1.4, thereby driving the rubber valve plate 6 connected with the rubber valve plate driving member 5 to move horizontally, to open or close the air guide channel 1.4.

[0068] As shown in Figure 2 , Figure 3 , Figure 10 , Figure 11 As shown, the starting control device includes a T-shaped inner pull button 18, an adjusting gland 16 connected to the top opening of the upper cover 15 through external threads, a starting pull button 17 sleeved on the upper part of the adjusting gland 16, and a touch starting rod 10, the lower end of the vertical part of the T-shaped inner pull button 18 is inserted into the center through hole of the adjusting gland 16, the starting pull button 17 can move up and down along the part of the adjusting gland 16 outside the top opening of the upper cover 15, and drive the T-shaped inner pull button 18 to move up and down, the lower part of the touch starting rod 10 is located in the air storage chamber 1.1, and the upper end is formed with external threads and is threadedly connected with the internal threads of the vertical part of the T-shaped inner pull button 18 through the diaphragm 11, the air storage chamber 1.1 is vertically provided with a guide column 9 through the protruding hole 1.2 formed on the bottom surface, the part of the touch starting rod 10 located in the air storage chamber 1.1 is sleeved on the guide column 9, and drives the rubber valve plate driving member 5 to drive the rubber valve plate 6 to open or close the air guide channel 1.4 by moving up and down along the guide column 9 under the control of the starting pull button 17 and the T-shaped inner pull button 18 to touch the rotation of the jack 2 in the rubber valve plate driving mechanism.

[0069] As shown in Figure 2 , Figure 12 , Figure 13As shown, the touch-activated rod 10 comprises a disc 10.3, a cylinder 10.1 integrally formed at the lower end of the disc 10.3, a conical body 10.2 integrally formed at the bottom end of the cylinder 10.1 for activating the jack 2 in the rubber valve plate driving mechanism, and a screw rod 10.4 integrally formed at the upper end of the disc 10.3, wherein the disc 10.3, the cylinder 10.1, the conical body 10.2 and the screw rod 10.4 are coaxially integrally formed, the diameter of the cylinder 10.1 is larger than that of the screw rod 10.4, the cylinder 10.1 is formed with a guide hole 10.5 capable of being sleeved on the guide column 9 and moving up and down along the guide column 9, the bottom of the conical body 10.2 is formed with an embedding groove 10.6 capable of being embedded in the convex hole 1.2 located at the center of the gas storage chamber 1.1, the screw rod 10.4 penetrates the film 11 and the tray 12 in sequence, the top end of the screw rod 10.4 is threadedly connected with the internal thread of the T-shaped inner pull knob 18, the root is fixedly connected with the film 11 and the tray 12 through the nut 13, and the middle part of the screw rod 10.4 is sleeved with the upper spring 14.

[0070] As shown in Figure 2 , Figure 14 , Figure 15 , Figure 16 As shown, the adjusting gland 16 comprises an external thread connecting portion 16.4 for connecting with the internal thread 15.1 formed at the opening at the top center of the upper cover 15, a guide portion 16.1 integrally formed at the upper end of the external thread connecting portion 16.4 and having a diameter smaller than that of the external thread connecting portion 16.4, guide concaves 16.2 symmetrically formed at both sides of the guide portion 16.1, and a limiting hook 16.3 formed at the top of the guide portion 16.1 and located at the upper end of the guide concave 16.2, wherein the inner side of the adjusting gland 16 is formed with a through hole 16.5 capable of being inserted into the vertical part of the T-shaped inner pull knob 18.

[0071] As shown in Figure 2 , Figure 17 , Figure 18As shown, the starting pull knob 17 includes a knob body 17.1 with a central inner sleeve hole 17.2 capable of inserting the guide part 16.1 of the adjusting cover 16, and symmetrical inverted hooks 17.3 formed at the inner sleeve hole 17.2 of the knob body 17.1 capable of being embedded into the guide concave 16.2 of the adjusting cover 16 and moving up and down along the guide concave 16.2 under the action of external force, the inverted hooks 17.3 are hooked with the limiting hooks 16.3 in the adjusting cover 16, thereby preventing the starting pull knob 17 from being separated from the adjusting cover 16; when the external force controls the starting pull knob 17 to move up and down along the guide concave 16.2, the touch starting rod 10 connected with the T-shaped inner pull knob 18 is driven to touch and open or close the air passage 1.4 of the rubber valve plate driving mechanism; when the external force controls the starting pull knob 17 to rotate left or right, the adjusting cover 16 is driven to rotate left or right, thereby adjusting the upper spring 14 and the diaphragm 11 to adjust the gas pressure range in the gas storage chamber 1.1. A circle of plum blossom edge 17.4 is formed on the outer periphery of the upper part of the starting pull knob 17 for facilitating the action of external force.

[0072] The mechanical automatic control pipeline gas self-closing valve (referred to as self-closing valve) of the present application is connected with a gas pipeline at the gas inlet end and connected with a gas hose and a gas appliance at the gas outlet end to replace a common gas ball valve. After the ball valve switch 20 of the gas outlet end of the self-closing valve is opened, the starting pull knob 17 is pulled up, the touch starting rod 10 connected with the inner pull knob 18 is driven to rise, the touch head 2.1 of the jack 2 in the rubber valve plate driving mechanism moves horizontally to the gas inlet side along with the angle expansion of the cone body 10.2 of the touch starting rod 10, pushes the rubber valve plate 6 to separate from the gas inlet port of the guide passage 1.4 in the main valve body 1, and at the same time, the flow controller 8 is connected with the air source, the gas fills the gas storage chamber 1.1, the diaphragm 11 is inflated by the rated gas pressure to make the upper spring 14 retract, and under the rated pressure and flow conditions, normal gas supply is ensured.

[0073] When the gas pressure exceeds the rated pressure, the diaphragm 11 continues to expand, the upper spring 14 retracts again, the cone body 10.2 of the touch starting rod 10 passes the jack 2, the jack 2 is separated from the cone body 10.2 and returns to the initial state, no longer generates a pushing force to the rubber valve plate 6, and the rubber valve plate 6 is re-sealed under the action of the conical spring 7.

[0074] When the gas pressure is less than the rated pressure, the diaphragm 11 retracts, the upper spring 14 expands, the touch starting rod 10 descends, the jack 2 is separated from the cone body 10.2 and returns to the initial state, no longer generates a pushing force to the rubber valve plate 6, and the rubber valve plate 6 is re-sealed under the action of the conical spring 7.

[0075] When the gas supply flow is greater than the rated flow, the gas capacity in the gas storage chamber 1.1 decreases, the pressure decreases, the skin film 11 retracts, the upper spring 14 opens, the starting rod 10 is touched and lowered, the jack 2 is separated from the conical body 10.2 and returns to the starting state, and the gas passage is re-sealed under the action of the conical spring 7.

[0076] Therefore, the mechanical automatic control pipeline gas self-closing valve can realize automatic control of overpressure, underpressure and overcurrent, and ensure the safety of gas application.

Claims

1. A mechanical automatic control pipeline gas self-closing valve, comprising a main valve body (1) with a middle part constituting a gas storage chamber (1.1), a flow controller (8) arranged inside a gas inlet chamber (1.5) of the main valve body (1), a manual ball valve switch mechanism arranged at a gas outlet end of the main valve body (1), a threaded interface (21) connected to a gas outlet end of the main valve body (1), and a rubber valve plate (6) arranged at a gas inlet side of a gas guide channel (1.4) of the gas storage chamber (1.1) and used for opening or closing the gas guide channel (1.4), characterized in that, The rubber valve plate (6) is connected with a rubber valve plate driving mechanism in the gas guiding passage (1.4) for driving the rubber valve plate (6) to open or close the gas guiding passage (1.4), a starting control device is vertically arranged in the gas storage chamber (1.1) of the middle part of the main valve body (1) and penetrates the upper cover (15) covering the upper port of the main valve body (1), the starting control device controls the driving of the rubber valve plate (6) by the rubber valve plate driving mechanism through vertical movement, and the pressure of the gas in the gas storage chamber (1.1) is adjusted. The rubber valve plate driving mechanism comprises a rubber valve plate driving member (5) connected with the rubber valve plate (6) at one end and driving the rubber valve plate (6) to horizontally move to open or close the gas guiding passage (1.4), and a jack (2) hingedly connected at the other end of the rubber valve plate driving member (5), the jack (2) is driven to rotate by the touch of the vertical movement of the starting control device, and drives the rubber valve plate driving member (5) to horizontally move along the gas guiding passage (1.4) to drive the rubber valve plate (6) to horizontally move to open or close the gas guiding passage (1.4). The rubber valve plate driving member (5) comprises a main shaft (5.6), a T-shaped shoulder (5.5) integrally formed at one end of the main shaft (5.6) for embedding into the connecting groove (6.1) of the rubber valve plate (6), left and right balance arms (5.1) and (5.2) integrally formed at left and right sides of the main shaft (5.6), upper and lower guide arms (5.3) and (5.4) integrally formed at upper and lower sides of the main shaft (5.6), the connecting line of the upper and lower guide arms (5.3) and (5.4) is perpendicular to the connecting line of the left and right balance arms (5.1) and (5.2), the left and right balance arms (5.1) and (5.2) are integrally connected with an axle hole flange (5.7) for connecting with the jack (2) at the end away from the T-shaped shoulder (5.5), the length of the upper guide arm (5.3) is greater than that of the lower guide arm (5.4), so that the upper guide arm (5.3) limits the rotation angle of the jack (2).

2. A mechanically automatically controlled self-closing valve for pipeline gas according to claim 1, characterized in that, The lower planes of the left and right balance arms (5.1) and (5.2) abut against the balance shoulder (1.3) at the port of the gas guiding passage (1.4) of the gas storage chamber (1.1) of the main valve body (1), and the rubber valve plate driving member (5) is kept balanced movement.

3. The mechanical automatic control pipeline gas self-closing valve according to claim 1, characterized in that, The jack (2) includes a contact head (2.1) and two identical lugs (2.2) integrally formed on one side of the contact head (2.1), the two lugs (2.2) are formed with shaft holes (2.3), the jack (2) and the rubber valve plate driving element (5) are connected by a cylindrical pin (3) penetrating the shaft hole flange (5.7) in the rubber valve plate driving element (5) and the lug (2.2) in the jack (2), and a torsion spring sleeved on the cylindrical pin (3), during the vertical movement of the starting control device, the contact head (2.1) in the jack (2) is touched to rotate the jack (2), which drives the rubber valve plate driving element (5) connected by the hinge to move horizontally along the air guide channel (1.4), thereby driving the rubber valve plate (6) connected with the rubber valve plate driving element (5) to move horizontally, to open or close the air guide channel (1.4).

4. The mechanical automatic control pipeline gas self-closing valve according to claim 1, characterized in that, The starting control device includes a T-shaped inner pull button (18), a lower part connected to the adjusting gland (16) at the top opening of the upper cover (15) by external threads, a starting pull button (17) sleeved on the upper part of the adjusting gland (16), and a contact starting rod (10), the lower end of the vertical part of the T-shaped inner pull button (18) is inserted into the center through hole of the adjusting gland (16), the starting pull button (17) can move up and down along the part of the adjusting gland (16) located outside the top opening of the upper cover (15) and drive the T-shaped inner pull button (18) to move up and down, the lower part of the contact starting rod (10) is located in the air storage chamber (1.1), the upper end is formed with external threads and is screwed with the internal threads of the vertical part of the T-shaped inner pull button (18), the air storage chamber (1.1) is vertically provided with a guide column (9) through the protruding hole (1.2) formed on the bottom surface, the part of the contact starting rod (10) located in the air storage chamber (1.1) is sleeved on the guide column (9) and moves up and down along the guide column (9) under the control of the starting pull button (17) and the T-shaped inner pull button (18) to drive the rotation of the jack (2) in the rubber valve plate driving mechanism to drive the rubber valve plate driving element (5) to open or close the air guide channel (1.4).

5. A mechanically automatically controlled self-closing valve for pipeline gas according to claim 4, characterized in that, The touch starting rod (10) comprises a disc (10.3), a cylinder (10.1) integrally formed at the lower end of the disc (10.3), a conical body (10.2) integrally formed at the bottom end of the cylinder (10.1) and used for touching the jack (2) in the rubber valve plate driving mechanism, and a screw rod (10.4) integrally formed at the upper end of the disc (10.3), wherein the disc (10.3), the cylinder (10.1), the conical body (10.2) and the screw rod (10.4) are coaxially integrally formed, the diameter of the cylinder (10.1) is larger than that of the screw rod (10.4), a guide hole (10.5) capable of being sleeved on the guide column (9) and moving up and down along the guide column (9) is formed in the cylinder (10.1), an embedding groove (10.6) capable of being embedded in the convex hole (1.2) located at the center of the gas storage chamber (1.1) is formed at the bottom of the conical body (10.2), the screw rod (10.4) penetrates the film (11) and the tray (12) in sequence, the top end of the screw rod (10.4) is in threaded connection with the internal thread of the T-shaped inner pull knob (18), the root is in fixed connection with the film (11) and the tray (12) through the nut (13), and the middle part of the screw rod (10.4) is sleeved with the upper spring (14).

6. A mechanically automatically controlled self-closing valve for pipeline gas according to claim 4, characterized in that, The adjusting gland (16) comprises an external thread connecting part (16.4) used for being connected with the internal thread (15.1) formed at the opening at the top center of the upper cover (15), a guide part (16.1) integrally formed at the upper end of the external thread connecting part (16.4) and having a diameter smaller than that of the external thread connecting part (16.4), guide concaves (16.2) symmetrically formed at both sides of the guide part (16.1), and a limiting hook (16.3) formed at the top of the guide part (16.1) and located at the upper end of the guide concave (16.2), wherein the inside of the adjusting gland (16) is formed with a through hole (16.5) capable of being inserted into the vertical part of the T-shaped inner pull knob (18) and penetrating up and down.

7. A mechanically automatically controlled self-closing valve for pipeline gas according to claim 6, characterized in that, The starting pull knob (17) comprises a pull knob body (17.1) with a central inner sleeve hole (17.2) capable of sleeving the guide part (16.1) of the adjusting pressure cover (16), and symmetrical inverted hooks (17.3) are formed at the inner sleeve hole (17.2) of the pull knob body (17.1) and capable of being embedded into the guide concave surface (16.2) of the adjusting pressure cover (16) and moving up and down along the guide concave surface (16.2) under the action of external force, the inverted hooks (17.3) are hooked with the limiting hooks (16.3) in the adjusting pressure cover (16) to prevent the starting pull knob (17) from being separated from the adjusting pressure cover (16); when the external force controls the starting pull knob (17) to move up and down along the guide concave surface (16.2), the touch starting rod (10) connected with the T-shaped inner pull knob (18) is driven to touch and start the rubber valve plate driving mechanism to open or close the air guiding channel (1.4); when the external force controls the starting pull knob (17) to rotate left or right, the adjusting pressure cover (16) is driven to rotate left or right to adjust the gas pressure range in the gas storage chamber (1.1) of the upper spring (14) and the leather film (11).

8. A mechanically automatically controlled self-closing valve for pipeline gas according to claim 7, characterized in that, A plum blossom edge (17.4) is formed on the outer periphery of the upper part of the starting pull knob (17) to facilitate the action of external force.

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