Large flow connecting rod type self-closing valve

Abstract

The utility model relates to a large flow connecting rod type self -closing valve, including valve body, plastic valve core and connecting rod, having the valve cavity in the valve body, the opposite sides of valve body are provided with the air inlet pipe and the air outlet pipe with the valve cavity intercommunication, having the valve plate in the air inlet pipe, the air inlet valve orifice is set up on the valve plate, the valve core seat is fixedly arranged in the valve cavity, the sliding cavity is arranged in the valve core seat, and the upper end opening of valve core seat is detachably fixed and covered with the iron pressing plate, the plastic valve core includes the connecting rod and the connecting seat, the connecting rod passes through the perforation of iron pressing plate and slides vertically, the upper end of connecting rod is fixedly connected with the magnet above iron pressing plate, the lower end of connecting rod is fixedly connected with connecting seat, connecting seat is vertically arranged in the sliding cavity, and the inclined slot is set up on connecting seat, the connecting rod passes through the accommodation opening of valve core seat, one end of connecting rod is fixedly arranged the sealing washer, and the sliding block is fixedly arranged on the section of side wall of connecting rod and is inserted into the inside of valve core seat. Reduce the part, thereby reduce the valve cavity occupied space, thereby increase the passing capacity of gas.

Description

Technical Field

[0001] This utility model belongs to the field of gas valve technology, specifically relating to a high-flow-rate linkage self-closing valve. Background Technology

[0002] A gas self-closing valve is a safety protection device installed on a gas pipeline that can automatically shut off after abnormal gas pressure (overpressure, underpressure) or gas interruption to prevent gas leakage. It can be triggered without manual operation.

[0003] When the gas pipeline experiences excessively high pressure (e.g., due to a pressure regulator malfunction), excessively low pressure (e.g., due to pipeline damage and leakage), or when gas supply is restored after a gas outage, the valve will automatically close, cutting off the gas supply and preventing dangers such as explosions and poisoning caused by gas leaks. Primarily used in residential and catering settings, it is typically installed after the gas meter and before the gas stove or water heater, serving as one of the "first lines of defense" for gas safety. After troubleshooting (e.g., repairing the pipeline and restoring normal pressure), the valve must be manually pressed on top or a specific reset button to reopen it and restore gas supply, ensuring users are aware of and can confirm safety.

[0004] An existing patent (publication number CN219549709U) discloses a linkage-type self-closing valve, in which the guide frame includes a base frame and a top frame. The base frame and the top frame are spliced ​​together to form a guide hole for the second valve stem to slide. An iron pressure plate is fixedly installed above the guide frame. The installation structure is complicated, occupies a lot of space in the valve cavity, resulting in a reduction in gas flow and affecting the performance. Moreover, the complicated installation structure is costly. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-flow-rate linkage self-closing valve, which solves the technical problems of high cost and low gas throughput caused by the complex structure of existing self-closing valves.

[0006] To solve the above problems, the technical solution of this utility model is: a high-flow-rate linkage-type self-closing valve, comprising:

[0007] The valve body has a valve cavity. An inlet pipe and an outlet pipe communicating with the valve cavity are provided on opposite sides of the valve body. A valve plate is provided inside the inlet pipe, and an inlet valve port is opened on the valve plate. A valve core seat is fixedly installed in the valve cavity. A sliding cavity is provided inside the valve core seat. An iron pressure plate is detachably and fixedly sealed at the upper opening of the valve core seat. A through hole is opened on the iron pressure plate. A clearance opening is opened on the side of the valve core seat.

[0008] The plastic valve core includes a connecting rod and a connecting seat. The connecting rod slides vertically through the through hole of the iron pressure plate. The upper end of the connecting rod is fixedly connected to the magnet above the iron pressure plate, and the lower end of the connecting rod is fixedly connected to the connecting seat. The connecting seat is vertically slidably arranged in the sliding cavity, and an inclined slot is opened on the connecting seat.

[0009] The connecting rod slides through the intake valve port and the clearance opening of the valve core seat; a sealing gasket is fixedly installed at one end of the connecting rod to seal the intake valve port; a slider is fixedly installed on a section of the side wall of the connecting rod that penetrates into the valve core seat, and the slider is slidably installed in the inclined slot.

[0010] When the plastic valve core moves upward, the inclined slot guides the slider, causing the connecting rod to move the sealing gasket to open the intake valve port. When the plastic valve core moves downward, the inclined slot guides the slider, causing the connecting rod to move the sealing gasket to close the intake valve port.

[0011] Preferably, a connecting column is fixedly installed at the bottom of the valve body, and a threaded groove is opened axially at the top of the connecting column; mounting holes aligned with the threaded groove are opened on both the valve core seat and the iron pressure plate for fixed connection by fasteners.

[0012] Preferably, a positioning block is fixedly installed at the upper end of the valve core seat, and a positioning hole is opened on the iron pressure plate to cooperate with the positioning block for positioning.

[0013] Preferably, the positioning blocks and positioning holes are configured to correspond one-to-one with each other.

[0014] Preferably, a valve cover is installed at the upper end of the valve body, a pull rod is threaded through the valve cover, the lower end of the pull rod is located directly above the magnet, a pull ring is provided at the top of the pull rod, a diaphragm is fixed to the side of the pull rod, and the valve cover presses the edge of the diaphragm tightly and fixes it to the valve body; the attraction between the magnet and the iron pressure plate is less than the attraction between the magnet and the lower end of the pull rod.

[0015] Preferably, an antimagnetic ring is fixedly fitted around the outer periphery of the magnet.

[0016] Preferably, an overflow shut-off valve is provided inside the air intake pipe.

[0017] Preferably, a ball valve is provided inside the air outlet pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention, through the cooperation of the valve core seat and the iron pressure plate, reduces the number of parts compared to the prior art, thereby reducing the space occupied by the valve cavity and increasing the gas throughput, resulting in better performance. At the same time, it simplifies the internal structure, reduces costs, and makes the manufacturing equipment more convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the self-closing valve of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the self-closing valve of this utility model;

[0022] Figure 3This is a schematic diagram of the installation of the connecting rod and the valve core seat in this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the plastic valve core in this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the valve body in this utility model.

[0025] Reference numerals: 1. Valve body; 11. Valve cavity; 12. Connecting column; 2. Inlet pipe; 21. Inlet valve port; 22. Overcurrent shut-off valve; 3. Outlet pipe; 31. Ball valve; 4. Valve core seat; 41. Fastener; 42. Positioning block; 5. Iron pressure plate; 51. Positioning hole; 6. Plastic valve core; 61. Connecting rod; 62. Connecting seat; 621. Inclined slot; 7. Magnet; 71. Anti-magnetic ring; 8. Connecting rod; 81. Sealing gasket; 82. Slider; 9. Valve cover; 91. Pull rod; 92. Diaphragm. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] Example: Figures 1-5 As shown, this embodiment provides a high-flow-rate linkage-type self-closing valve, including a valve body 1, a plastic valve core 6, and a connecting rod 8. The valve body 1 has a valve cavity 11. An inlet pipe 2 and an outlet pipe 3 communicating with the valve cavity 11 are provided on opposite sides of the valve body 1. A valve plate is provided in the inlet pipe 2, and an inlet valve port 21 is opened on the valve plate. A valve core seat 4 is fixedly provided in the valve cavity 11. A sliding cavity is provided in the valve core seat 4. An iron pressure plate 5 is detachably and fixedly sealed at the upper opening of the valve core seat 4. A through hole is opened on the iron pressure plate 5. A clearance opening is opened on the side of the valve core seat 4. The plastic valve core 6 includes a connecting rod 61 and a connecting seat 62. The connecting rod 61 slides vertically through the through hole of the iron pressure plate 5. The upper end of the connecting rod 61 is fixedly connected to the magnet 7 above the iron pressure plate 5. The magnet 7 can be fixedly connected to the connecting rod 61 by fasteners 41 such as screws or bolts. The lower end of the connecting rod 61 is fixedly connected to the connecting seat 62. The connecting seat 62 is vertically slidably arranged in the sliding cavity. An inclined slot 621 is opened on the connecting seat 62. The connecting rod 8 slides through the intake valve port 21 and the clearance port of the valve core seat 4. A sealing gasket 81 is fixedly arranged at one end of the connecting rod 8. The sealing gasket 81 is used to seal the intake valve port 21. A slider 82 is fixedly arranged on a section of the side wall of the connecting rod 8 that penetrates into the valve core seat 4. The slider 82 is slidably arranged in the inclined slot 621.

[0028] When the plastic valve core 6 moves upward, the inclined slot 621 guides the slider 82, causing the connecting rod 8 to move the sealing gasket 81 to open the air intake valve port 21. When the plastic valve core 6 moves downward, the inclined slot 621 guides the slider 82, causing the connecting rod 8 to move the sealing gasket 81 to close the air intake valve port 21.

[0029] With the above configuration, compared with the existing technology, the top frame is omitted, and the iron pressure plate 5 not only replaces the top frame, but also works in conjunction with the magnet 7, which simplifies the structure, reduces the space occupied inside the valve chamber 11, increases the gas throughput, and has a good performance.

[0030] In this embodiment of a high-flow-rate linkage-type self-closing valve, a connecting column 12 is fixedly installed at the bottom of the valve body 1, and a threaded groove is axially formed at the top of the connecting column 12. Mounting holes aligned with the threaded groove are formed on both the valve core seat 4 and the iron pressure plate 5 for fixed connection by fasteners 41. This configuration is simple in structure, simultaneously fixing the iron pressure plate 5 and the valve core seat 4, simplifying assembly. The fasteners 41 can be screws or bolts that pass through the mounting holes of both and are threaded into the threaded groove. Optionally, at least two connecting seats 62 are symmetrically located on the outer periphery of the valve core seat 4, providing good installation stability.

[0031] In this embodiment of a high-flow-rate linkage-type self-closing valve, a positioning block 42 is fixedly installed on the upper end of the valve core seat 4, and a positioning hole 51 is opened on the iron pressure plate 5 to cooperate with and position the positioning block 42. This facilitates quick positioning of the iron pressure plate 5 and further improves the installation stability of the iron pressure plate 5.

[0032] In this embodiment of a high-flow-rate linkage-type self-closing valve, the positioning blocks 42 and positioning holes 51 are configured in a one-to-one correspondence. This configuration further improves the installation stability of the iron pressure plate 5 and prevents the iron pressure plate 5 from rotating or sliding.

[0033] In this embodiment of a high-flow-rate linkage-type self-closing valve, a valve cover 9 is installed on the upper end of the valve body 1, and a pull rod 91 is threaded through the valve cover 9. The lower end of the pull rod 91 is located directly above the magnet 7, and a pull ring is provided on the top of the pull rod 91. A diaphragm 92 is fixed to the side of the pull rod 91, and the valve cover 9 presses and fixes the edge of the diaphragm 92 to the valve body 1. The attraction between the magnet 7 and the iron pressure plate 5 is less than the attraction between the magnet 7 and the lower end of the pull rod 91. Through the coordinated operation of the valve cover 9, the pull rod 91, the diaphragm 92, and the magnet 7, the gas self-closing valve automatically switches between normal open and closed states according to the operating conditions.

[0034] In a high-flow-rate linkage self-closing valve of this embodiment, an anti-magnetic ring 71 is fixedly sleeved on the outside of the magnet 7.

[0035] In this embodiment of a high-flow-rate linkage-type self-closing valve, an overflow shut-off valve 22 is provided in the inlet pipe 2, and a ball valve 31 is provided in the outlet pipe 3. This further improves the safety of the gas self-closing valve.

[0036] The working principle is as follows:

[0037] When in use, the gas self-closing valve is closed when the pressure of the gas entering the gas self-closing valve is insufficient, that is, when the force of the gas on the diaphragm 92 is less than the magnetic attraction between the magnet 7 and the iron pressure plate 5.

[0038] When the pressure of the gas entering the gas self-closing valve is normal, that is, when the force of the gas on the diaphragm 92 is greater than the magnetic attraction between the magnet 7 and the iron pressure plate 5 but less than the magnetic attraction between the magnet 7 and the lower convex edge of the pull rod 91, the gas self-closing valve opens normally. If the tension of the gas on the diaphragm 92 is insufficient to overcome the attraction between the magnet 7 and the lower convex edge of the pull rod 91, the gas flows normally and does not flow out.

[0039] When the pressure of the gas entering the gas self-closing valve exceeds the pressure, that is, when the force of the gas on the diaphragm 92 is greater than the magnetic attraction between the magnet 7 and the lower convex edge of the pull rod 91, the diaphragm 92 pushes the pull rod 91 to move the magnet 7. After the plastic valve core 6 reaches the limited position of the iron pressure plate 5, the magnet 7 separates from the lower convex edge of the pull rod 91. As the diaphragm 92 moves the pull rod 91, the magnetic attraction between the magnet 7 and the iron pressure plate 5 gradually becomes greater than the magnetic attraction between the magnet 7 and the lower convex edge of the pull rod 91. The magnet 7 is attracted to the iron pressure plate 5, thereby the plastic valve core 6 drives the connecting rod 8 to operate, so that the sealing gasket 81 seals the air inlet valve port 21, thereby closing the gas self-closing valve.

[0040] When there is excessive gas flow in the gas pipeline, the overflow shut-off valve 22 will cut off the gas flow in the valve body 1.

Claims

1. A high-flow-rate linkage-type self-closing valve, characterized in that, include: The valve body (1) has a valve cavity (11) inside. An air inlet pipe (2) and an air outlet pipe (3) communicating with the valve cavity (11) are provided on opposite sides of the valve body (1). A valve plate is provided inside the air inlet pipe (2), and an air inlet valve port (21) is opened on the valve plate. A valve core seat (4) is fixedly provided in the valve cavity (11). A sliding cavity is provided inside the valve core seat (4). An iron pressure plate (5) is detachably and fixedly sealed at the upper opening of the valve core seat (4). A through hole is opened on the iron pressure plate (5). A clearance opening is opened on the side of the valve core seat (4). The plastic valve core (6) includes a connecting rod (61) and a connecting seat (62). The connecting rod (61) slides vertically through the through hole of the iron pressure plate (5). The upper end of the connecting rod (61) is fixedly connected to the magnet (7) above the iron pressure plate (5). The lower end of the connecting rod (61) is fixedly connected to the connecting seat (62). The connecting seat (62) is vertically slidably disposed in the sliding cavity. An inclined slot (621) is opened on the connecting seat (62). The connecting rod (8) slides through the intake valve port (21) and the clearance opening of the valve core seat (4); a sealing gasket (81) is fixedly installed at one end of the connecting rod (8), and the sealing gasket (81) is used to seal the intake valve port (21); a slider (82) is fixedly installed on a section of the side wall of the connecting rod (8) that penetrates into the valve core seat (4), and the slider (82) is slidably installed in the inclined slot (621); When the plastic valve core (6) moves upward, the inclined slot (621) guides the slider (82), causing the connecting rod (8) to move the sealing gasket (81) to open the air intake valve (21). When the plastic valve core (6) moves downward, the inclined slot (621) guides the slider (82), causing the connecting rod (8) to move the sealing gasket (81) to close the air intake valve (21).

2. The high-flow-rate linkage-type self-closing valve according to claim 1, characterized in that, A connecting column (12) is fixedly installed at the bottom of the valve body (1), and a threaded groove is opened axially at the top of the connecting column (12); mounting holes aligned with the threaded groove are opened on the valve core seat (4) and the iron pressure plate (5) to be fixedly connected by fasteners (41).

3. A high-flow-rate linkage-type self-closing valve according to claim 1, characterized in that, A positioning block (42) is fixedly installed at the upper end of the valve core seat (4), and a positioning hole (51) is opened on the iron pressure plate (5) to cooperate with the positioning block (42) for positioning.

4. A high-flow-rate linkage-type self-closing valve according to claim 3, characterized in that, The positioning blocks (42) and positioning holes (51) are set to correspond one-to-one.

5. A high-flow-rate linkage-type self-closing valve according to claim 1, characterized in that, A valve cover (9) is installed on the upper end of the valve body (1). A pull rod (91) is threaded through the valve cover (9). The lower end of the pull rod (91) is located directly above the magnet (7). A pull ring is provided on the top of the pull rod (91). A diaphragm (92) is fixed on the side of the pull rod (91). The valve cover (9) presses the edge of the diaphragm (92) tightly and fixes it on the valve body (1). The attraction between the magnet (7) and the iron pressure plate (5) is less than the attraction between the magnet (7) and the lower end of the pull rod (91).

6. A high-flow-rate linkage-type self-closing valve according to claim 1, characterized in that, An antimagnetic ring (71) is fixedly fitted around the outer periphery of the magnet (7).

7. A high-flow-rate linkage-type self-closing valve according to claim 1, characterized in that, An overcurrent shut-off valve (22) is installed inside the air intake pipe (2).

8. A high-flow-rate linkage-type self-closing valve according to claim 1, characterized in that, A ball valve (31) is installed inside the air outlet pipe (3).

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