Fire valve structure having automatic liquid level control function

Abstract

The present invention relates to the technical field of floater-actuated valves, and in particular to a fire valve structure having an automatic liquid level control function. The fire valve structure comprises a valve body; one end of the valve body is fixedly connected to an adjustment pipe, and the other end of the valve body is fixedly connected to a connecting unit; an assembling unit is slidably connected onto the connecting unit; a control unit is installed in the valve body; a piston unit is slidably installed in the adjustment pipe and located on one end of the control unit; the other end of the control unit is slidably connected to a flow guide piece; a rubber gasket is installed between the connecting unit and the assembling unit. According to the fire valve structure of the present invention, an annular floating ball is mainly designed, when water flow is too large, the annular floating ball moves upwards to shorten the distance until a conical valve core and an annular valve core are closed, so as to reduce the water flow in the valve body, and when the water flow is too small, the annular floating ball moves downwards, and then the two valve cores are opened to increase the water flow in the valve body, so as to regulate and control the liquid level in the valve body, thereby allowing for regulation and control of the liquid level in the valve body, stable control of the liquid level in the valve body, and floater-based automatic adjustment of the liquid level of the fire valve.

Description

A fire valve structure with automatic liquid level control Technical Field

[0001] The invention relates to the technical field of float-actuated valves, in particular to a fire-fighting valve structure with automatic liquid level control. Background Art

[0002] Fire valves are mainly used on equipment such as fire water tanks to control the supply of fire water.

[0003] In the prior art, for example, the Chinese patent disclosed in application number CN2014100615114 is named: Ring-type fire-fighting air valve device (IPC classification number F16K31 / 18), which includes a valve core lower seat and a valve base flange installed at the bottom of the valve outer body, a valve water inlet provided on the valve outer body, a rubber ring embedded in the valve core lower seat, a guide rail provided between the valve outer body located above the valve water inlet and the valve core upper seat, a float connecting plate provided in the ring-type float, a float connecting plate fixing hole provided at the center of the float connecting plate, a transmission connecting rod fixing hole provided at the center of the valve outer body, the bottom of the transmission connecting rod passes through the transmission connecting rod fixing hole and is fixed to the valve core upper seat, and the top of the transmission connecting rod passes through the float connecting plate fixing hole and is movably connected to the float connecting plate by bolts. Technical issues

[0004] However, in the prior art, such as the valve device mentioned in application number: CN2014100615114, it is impossible to accurately adjust the liquid flow in the valve. In the prior art, excessive liquid pressure in the valve will cause excessive pressure on the inner wall of the fire water pipe, which may easily damage the fire water pipe. In addition, excessive pressure will increase the difficulty of controlling the fire water chamber. Therefore, it is necessary to design a fire valve structure with automatic liquid level control. Technical Solutions

[0005] The object of the present invention is to provide a fire valve structure with automatic liquid level control to solve the problems in the prior art.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A fire valve structure with automatic liquid level control, the fire valve structure includes a valve body, one end of the valve body is fixedly connected to a regulating pipe, the other end is fixedly connected to a connecting component, the connecting component is slidably connected to an assembly component, and a control component for controlling the flow of water in the valve body is installed in the valve body.

[0008] A piston assembly for liquid level control is slidably installed in the regulating tube and at one end of the control assembly. A flow guide is slidably connected to the other end of the control assembly. A rubber gasket for preventing overflow and dust is installed between the connecting assembly and the assembly assembly.

[0009] Preferably, a through pipe connected to the regulating pipe is installed at one end of the valve body, a reinforcement rod is fixedly connected in an array on the through pipe, a butterfly valve is rotatably connected in the through pipe, a mounting ring is fixed in the valve body, a valve plate is installed at the axis of the valve body, an axial hole is opened on the valve plate, and a matching groove is arranged in an array on one side of the valve plate, and the valve plate is fixed to the valve body through a stabilizing rod.

[0010] Preferably, the regulating tube is fixed with a water outlet interface for connecting to a fire water pipe, one side of the regulating tube is fixed with an air port, and the other side is fixed with an air flow tube, and air chamber one and air chamber two are provided at both ends of the regulating tube, and the air flow tube is used to connect air chamber one and air chamber two.

[0011] A partition is fixedly connected in the regulating tube and below the through tube. A second piston is slidably installed in the second air chamber. An air pressure chamber is provided between the second piston and the partition, and the air pressure chamber is communicated with the air port.

[0012] Preferably, the assembly component is fixedly connected to the outlet pipe on the fire water pipe. The assembly component includes a sliding sleeve, a threaded hole is provided on the sliding sleeve, a flange is fixedly connected to one end of the sliding sleeve, and a plurality of mounting plates are fixedly connected to the other end. A slot for installing a rubber gasket is provided in the flange, a spring is fixedly connected to one side of the mounting plate, and a guide rod is fixedly connected to an array in the sliding sleeve.

[0013] Preferably, the connecting assembly includes a connecting shell fixedly connected to one end of the valve body, a plurality of threaded holes 2 are provided on the connecting shell, a sealing ring is fixedly connected to the connecting shell, a guide groove is provided in an array on the sealing ring, a conical tube for connecting to the water outlet pipe is fixedly connected to one end of the connecting shell, and a guide block is fixedly connected inside the connecting shell.

[0014] A filter is installed at the axis of the guide block, a pin is fixed on the filter, one end of the spring is connected to the sealing ring, a rubber gasket is fixed between the tapered tube and the sliding sleeve, and the guide groove is matched with the guide rod.

[0015] Preferably, the guide member includes a built-in block, a pin groove is provided at one end of the built-in block, a mounting hole is provided at the other end, a chamfer is provided at one end of the built-in block, and a plurality of support rods are fixedly connected to the other end, a limiting rod is fixed in the mounting hole, and a plurality of support rods are fixed to the outside of the built-in block, and the support rods are abutted against the inner wall of the connecting shell.

[0016] One end of the support rod is fixedly connected to two fixed blocks, one fixed block is fixedly connected to one end of the drainage tube, and a circular groove is opened at the axis of the other fixed block. The fixed block is clamped in the mounting ring, and the drainage tube is fixedly connected between the two fixed blocks. Round rods are installed in an array between the two fixed blocks, and the end of the drainage tube is fixedly connected to a limiting ring.

[0017] Preferably, the control component includes a shaft rod 1, a round block is fixedly connected to one end of the shaft rod 1, the round block is slidably installed in the mounting hole, a conical valve core for controlling the liquid level is fixedly connected to one end of the round block, the conical valve core cooperates with the limit ring, a straight groove is opened on the round block, the straight groove cooperates with the limit rod, and a side rod is fixed to the shaft rod 1.

[0018] Preferably, an annular valve core for controlling the liquid level is fixedly connected to the side rod, a matching block is fixedly connected to one end of the annular valve core, the matching groove cooperates with the matching block, the annular valve core is slidably installed in the circular groove, one end of the shaft rod one is connected to the shaft rod two, the shaft rod two is slidably connected to the shaft hole, and one end of the shaft rod two is fixedly connected to a threaded rod.

[0019] Preferably, one side of the side rod is rotatably connected to a rotating block, the rotating block is threadedly connected to the threaded rod, the second shaft rod passes through and is slidably arranged on the valve body and the regulating tube, the end of the second shaft rod away from the first shaft rod is fixedly connected to the oblique rod one, and the second shaft rod is provided with a through groove.

[0020] Preferably, the piston assembly includes piston 1 and piston 2, piston 1 is located in air chamber 1, piston 2 is located below piston 1, an annular float for regulating the liquid level is fixed below piston 1, and a moving rod is fixed on piston 1.

[0021] One end of the moving rod is fixedly connected to the oblique rod 2, which is parallel to the oblique rod 1 and slidably connected. The moving rod and the oblique rod 2 are both slidably connected to the through slot, and both ends of the oblique rod 2 are fixedly connected to limit blocks for controlling the movement of the oblique rod 2. Beneficial effects

[0022] Beneficial effects of the present invention:

[0023] 1. The fire valve structure of the present invention is mainly designed with an annular float to sense the changes in water flow in the regulating pipe and monitor the water flow pressure at all times. When the water flow is too large, the annular float moves upward and shrinks to close the conical valve core and the annular valve core, thereby reducing the water flow in the valve body. If the water flow is too small and the water level drops, the annular float moves downward and opens the two valve cores to replenish the water flow in the valve body and regulate the liquid level in the valve body.

[0024] 2. The fire valve structure of the present invention is simple in structure, and the liquid level in the valve body is regulated and stably controlled to ensure the stable water supply from the fire valve to the external fire pipe and the water supply pressure. The float is used to control the liquid level of the fire valve, which is automatically adjusted and easy to operate. It is suitable for actual fire valve use and easy to install. It can be used in connection with a variety of pipes with different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] FIG1 is a schematic structural diagram of a fire valve according to the present invention;

[0027] FIG2 is a cross-sectional view of the fire valve structure of the present invention;

[0028] FIG3 is a schematic diagram of the structure of the assembly components of the present invention;

[0029] FIG4 is a schematic diagram of the structure of the assembly components and the connection components of the present invention;

[0030] FIG5 is a schematic structural diagram of a flow guide member according to the present invention;

[0031] FIG6 is a schematic structural diagram of a flow guide member according to the present invention;

[0032] FIG7 is a schematic diagram of the control assembly structure of the present invention;

[0033] FIG8 is a schematic diagram of the installation structure of the control assembly and the flow guide member of the present invention;

[0034] FIG9 is a cross-sectional view of the control assembly of the present invention;

[0035] Figure 10 is a schematic structural diagram of the piston assembly of the present invention;

[0036] Figure 11 is a schematic structural diagram of the valve body of the present invention;

[0037] FIG12 is a cross-sectional view of the regulating valve of the present invention;

[0038] FIG13 is a schematic diagram of the internal structure of the valve body of the present invention. Modes for Carrying Out the Invention

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0040] The invention relates to a fire valve structure with automatic liquid level control, which is an operating device characterized by float actuation and has an IPC classification number of F16K31 / 18.

[0041] As shown in Figure 1, the fire valve structure includes a valve body 1, one end of the valve body 1 is fixedly connected to a regulating pipe 2, and the other end is installed with an assembly component 3. The assembly component 3 is fixedly connected to a water outlet pipe 9, and the water outlet pipe 9 is connected to a fire pressure water tank for connecting fire water.

[0042] As shown in Figure 2, a control component 5 is installed in the valve body 1. One end of the control component 5 is slidably connected to a flow guide 8, and the other end is provided with a piston component 6. The piston component 6 is slidably connected to the regulating tube 2. The flow guide 8 is fixedly arranged inside the valve body 1. A connecting component 4 is slidably installed in the assembly component 3. A rubber gasket 7 is installed between the connecting component 4 and the assembly component 3. The rubber gasket 7 is located at the connection between the outlet pipe 9 and the assembly component 3 to seal the connection position between the valve body 1 and the outlet pipe 9 to prevent high pressure from causing water leakage at the connection position.

[0043] As shown in Figures 3 and 4, the assembly component 3 includes a sliding sleeve 31, which has a threaded hole 310. One end of the sliding sleeve 31 is fixedly connected to a flange 32, and a slot 33 is provided in the flange 32. The other end of the sliding sleeve 31 is fixedly connected to a plurality of mounting plates 35, one side of the mounting plate 35 is fixedly connected to a spring 36, and the inner wall of the sliding sleeve 31 is fixedly connected to an array of guide rods 34.

[0044] The connecting assembly 4 includes a connecting shell 41, which is provided with a plurality of threaded holes 43. A sealing ring 42 is fixedly provided on the connecting shell 41. The sealing ring 42 is provided with an array of guide grooves 45. The guide grooves 45 are slidably matched with the guide rod 34. A tapered tube 44 is fixedly installed at one end of the connecting shell 41. The tapered tube 44 passes through the sliding sleeve 31 and extends into the end of the pipe body of the water outlet pipe 9. The outer wall of the tapered tube 44 can cooperate with the water outlet pipes 9 of different diameters, connecting the valve body 1 with the water outlet pipes 9 of different diameters.

[0045] A guide block 46 is fixedly installed in the connecting shell 41, and a filter screen 47 is installed at the axis of the guide block 46. A pin 48 is fixedly connected to the filter screen 47. One end of the spring 36 is fixedly connected to the side of the sealing ring 42 away from the tapered tube 44. When the flange 1 32 is fixedly connected to the flange 2 at the end of the outlet pipe 9, the spring 36 pushes the tapered tube 44 to be tightly connected to the end of the outlet pipe 9. The bolt is passed through the threaded hole 1 310 and connected to the threaded hole 2 43 to fix the sliding sleeve 31 and the connecting shell 41.

[0046] A rubber gasket 7 is fixedly installed on the outside of the tapered tube 44, between the slot 33 and the sliding sleeve 31, to seal between the tapered tube 44 and the sliding sleeve 31, to prevent water leakage at the connection between the tapered tube 44 and the water outlet pipe 9, and to ensure that the valve body 1 and the water outlet pipe 9 are firmly connected. A rubber gasket 7 is also installed between the slot 33 and the second flange to seal between the two flanges to prevent dust and water leakage.

[0047] As shown in Figures 5 and 6, the guide member 8 includes a built-in block 81, which is fixedly connected to the filter screen 47 in the connecting shell 41. A chamfer 812 is provided at one end of the built-in block 81, and a plurality of support rods 84 are fixedly connected to the other end. A pin groove 811 is provided at one end of the built-in block 81, and a mounting hole 85 is provided at the other end. A limiting rod 86 is fixedly connected in the mounting hole 85.

[0048] The pin groove 811 and the chamfer 812 are located at the same end of the built-in block 81, and the chamfer 812 is arranged opposite to the guide block 46. Several support rods 82 are fixedly installed on the outside of the built-in block 81. The ends of the support rods 82 away from the built-in block 81 abut against the inner wall of the connecting shell 41, supporting the inner wall of the connecting shell 41 and the built-in block 81.

[0049] Two fixed blocks 87 are fixedly installed on one end of the support rod 84 away from the built-in block 81. The two fixed blocks 87 are installed in the valve body 1. A drainage tube 89 is fastened between the two fixed blocks 87. One fixed block 87 is fastened to one end of the drainage tube 89, and a circular groove 80 is opened at the axis center of the other fixed block 87, and the circular groove 80 is coaxial with the drainage tube 89.

[0050] An array of round rods 88 are installed on the outside of the drainage pipe 89. The two ends of the round rods 88 are respectively fastened to two fixing blocks 87. The end of the drainage pipe 89 is fixedly connected to a limiting ring 890 for blocking the flow for fire protection.

[0051] The fire-fighting water flowing out of the outlet pipe 9 is filtered through the filter screen 47 and then flows out from between the chamfer 812 and the guide block 46 , then flows along the outside of the built-in block 81 , and finally flows between the adjacent support rods 84 and is collected in the drainage pipe 89 .

[0052] As shown in Figures 7, 8, 9 and 10, the control component 5 includes a shaft rod 51, one end of which is fixedly connected to a round block 53, and one end of the round block 53 is fixedly installed with a conical valve core 55, and the inclined surface of the conical valve core 55 faces the limiting ring 890. When the inclined surface of the conical valve core 55 is in contact with the limiting ring 890, the drainage tube 89 and the flow channel in the connecting shell 41 can be sealed to prevent water from flowing out.

[0053] A straight groove 54 is provided on the round block 53, and the straight groove 54 is slidably connected to the limit rod 86. The round block 53 is slidably set in the mounting hole 85. When the round block 53 moves back and forth, the limit rod 86 and the straight groove 54 can be used to guide the round block 53 to move horizontally.

[0054] The shaft rod 1 51 is fixedly connected to a side rod 512, and an annular valve core 56 is fixedly installed on the side rod 512. One end of the annular valve core 56 is fastened to a matching block 57 distributed in an array. The annular valve core 56 is slidably installed in the circular groove 80 and is rotatably connected to a rotating block 511 located on one side of the side rod 512. One end of the shaft rod 1 51 is connected to the shaft rod 2 52, and one end of the shaft rod 2 52 is fixedly connected to a threaded rod 521.

[0055] An internal thread is provided inside the rotating block 511, and the threaded rod 521 cooperates with the internal thread. By rotating the rotating block 511, the shaft rod 2 52 can be moved to adjust the overall length of the shaft rod 1 51 and the shaft rod 2 52. The end of the shaft rod 2 52 away from the shaft rod 1 51 is fixedly connected to the inclined rod 1 58, and a through groove 59 is provided at the connection between the shaft rod 2 52 and the inclined rod 1 58.

[0056] The piston assembly 6 includes piston 1 61 and piston 2 27. Piston 2 27 is located below piston 1 61. An annular float 62 is fixedly installed below piston 1 61. The annular float 62 contacts the water flow in the regulating tube 2 and is affected by the buoyancy of the water to move piston 1 61 upward. A moving rod 63 is provided on piston 1 61. One end of the moving rod 63 is fixedly connected to piston 1 61, and the other end is fixedly connected to inclined rod 2 64. Inclined rod 2 64 is arranged parallel to inclined rod 1 58.

[0057] Both the moving rod 63 and the inclined rod 2 64 can pass through the through groove 59 and be slidably connected to the through groove 59, and the inclined rod 2 64 is slidably connected to the inclined rod 1 58. Limit blocks are fixedly installed at both ends of the inclined rod 2 64 to prevent the inclined rod 2 64 and the inclined rod 1 58 from falling off. When the piston 1 61 moves upward, it drives the shaft rod 1 51 to move toward the regulating tube 2, and vice versa, it moves away from the regulating tube 2.

[0058] One end of the valve body 1 is fixedly connected to the connecting shell 41, and the other end is provided with a through pipe 10, which is connected to the regulating pipe 2, and an array of reinforcement rods 13 are provided on the through pipe 10. The reinforcement rods 13 are fixedly connected between the valve body 1 and the regulating pipe 2, and a butterfly valve 12 is rotatably connected in the through pipe 10. The rotary plate of the butterfly valve 12 is set on one side of the through pipe 10 for actual opening and use, and the shaft rod 2 52 passes through the side walls of the valve body 1 and the regulating pipe 2, so that it is slidably set on the valve body 1 and the regulating pipe 2.

[0059] A water outlet interface 21 is fixedly provided on the regulating pipe 2 for connecting to a fire water pipe. An air port 22 is fixedly provided on one side of the regulating pipe 2, and an air flow pipe 23 is fixedly connected to the other side. A partition 28 is fixedly connected inside the regulating pipe 2 and below the through pipe 10. After the inclined rod 2 64 contacts the partition 28, the piston 1 61 stops moving downward.

[0060] The two ends of the regulating tube 2 are air chamber 1 24 and air chamber 2 25 respectively. The air flow tube 23 connects air chamber 1 24 and air chamber 2 25 for gas exchange between the air chambers. Piston 1 61 is located in air chamber 1 24, piston 27 is located in air chamber 2 25, and there is an air pressure chamber 26 between piston 2 27 and the partition 28. The air pressure chamber 26 is connected to the air port 22. The pressure in the air pressure chamber 26 is atmospheric pressure. A pressurizing device can also be connected through the air port 22 to adjust the pressure in the air pressure chamber 26.

[0061] A mounting ring 15 is fixedly installed in the valve body 1, and the mounting ring 15 is clamped with the fixed block 87 for connecting the fixed block 87 and the valve body 1. A valve plate 16 is fixedly connected to one end of the annular valve core 56 in the valve body 1. An axial hole 18 is provided on the valve plate 16, and the axial hole 18 is slidingly connected to the shaft rod 2 52. An array of matching grooves 17 are provided on one side of the valve plate 16. The matching grooves 17 match with the matching block 57 to seal the drainage tube 89, prevent water from passing through and avoid backflow. A stabilizing rod 14 is fixedly connected to the side of the valve plate 16, and the stabilizing rod 14 connects the valve plate 16 and the valve body 1.

[0062] Here's how it works:

[0063] After the fire valve is installed on the fire pressure water tank, the butterfly valve 12 is closed, and the water flow only flows to the through pipe 10, that is, it stops, and the water flow fills the valve body 1. The conical valve core 55 on the built-in block 81 fits on the built-in block 81, and the annular valve core 56 is located between the two fixed blocks 87. At this time, the flow channel in the valve body 1 is in an open state.

[0064] After the fire hose pipe is connected to the water outlet interface 21, the butterfly valve 12 is opened to allow the fire water to flow into the regulating pipe 2. After the water gradually fills the regulating pipe 2, it will contact the float structure, that is, the annular float 62. The interior of the air pressure chamber 26 is set to an initial pressure, which can be the ambient pressure or the pressure set by the external equipment. When the water flow is stable and the pressure is stable, and is the same as the initial pressure, the water flows steadily to the fire hose and the float structure will not move.

[0065] If the water pressure increases, the buoyancy of the annular float 62 is greater than the initial pressure, and the float structure gradually moves upward, which can push up the piston 1 61. The piston 1 61 moves upward, and at this time, the gas in the air chamber 1 24 is squeezed into the air chamber 2 25. In this process, the conical valve core 55 and the annular valve core 56 gradually move toward the regulating pipe 2, reducing the water flow and the water pressure. The water flow pressure can be automatically regulated to maintain the initial pressure, and the liquid level in the regulating pipe 2 can be regulated to avoid excessive water flow in the fire water pipe, which is out of control for firefighters, and to avoid excessive pressure on the fire water pipe wall caused by excessive water flow, thereby reducing damage to the fire water pipe.

[0066] When the annular float 62 does not move the inclined rod 2 64 to the limit block located below it and fits with the upper end of the inclined rod 1 58, the inclined rod 2 64 cannot move upward, the inclined surface of the conical valve core 55 fits with the limit ring 890, and the matching block 57 on the annular valve core 56 fits with the matching groove 17, sealing the flow channel in the valve body 1, performing overpressure protection, and preventing the water flow from breaking through the limit water pressure. When the water flow in the regulating pipe 2 becomes smaller, the annular float 62 moves downward, and the conical valve core 55 and the annular valve core 56 can be opened to replenish water supply, maintain the water flow and water pressure in the regulating pipe 2, and regulate the liquid level in the regulating pipe 2.

[0067] If an external device is used to set the initial pressure of the air pressure chamber 26, when the annular float 62 moves due to buoyancy, a pressure sensor is installed in the air pressure chamber 26. The pressure sensor can detect the increase in pressure in the air pressure chamber 26 and immediately release the pressure at this time. In this way, the annular float 62 can regulate the water flow and water pressure in the valve and control the liquid level inside the fire valve.

[0068] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A fire valve structure with automatic liquid level control, the fire valve structure comprising a valve body (1), characterized in that: One end of the valve body (1) is fixedly connected to a regulating pipe (2), and the other end is fixedly connected to a connecting component (4), an assembly component (3) is slidably connected to the connecting component (4), and a control component (5) for controlling the flow of water in the valve body (1) is installed in the valve body (1); A piston assembly (6) for liquid level control is slidably mounted in the regulating tube (2) and located at one end of the control assembly (5); a flow guide (8) is slidably connected to the other end of the control assembly (5); and a rubber gasket (7) for preventing overflow and dust is installed between the connecting assembly (4) and the assembly assembly (3).

2. The fire valve structure with automatic liquid level control according to claim 1 is characterized in that: A through pipe (10) connected to the regulating pipe (2) is installed at one end of the valve body (1), a reinforcement rod (13) is fixedly connected in an array on the through pipe (10), a butterfly valve (12) is rotatably connected in the through pipe (10), a mounting ring (15) is fixedly connected in the valve body (1), a valve plate (16) is installed at the axis of the valve body (1), an axial hole (18) is opened in the valve plate (16), a matching groove (17) is arranged in an array on one side of the valve plate (16), and the valve plate (16) is fixedly connected to the valve body (1) via a stabilizing rod (14).

3. The fire valve structure with automatic liquid level control according to claim 2 is characterized in that: The regulating pipe (2) is fixedly connected to a water outlet interface (21) for connecting to a fire water pipe, one side of the regulating pipe (2) is fixedly connected to an air port (22), and the other side is fixedly connected to an air flow pipe (23), and both ends of the regulating pipe (2) are provided with an air chamber 1 (24) and an air chamber 2 (25), and the air flow pipe (23) is used to connect the air chamber 1 (24) with the air chamber 2 (25); A partition plate (28) is fixedly connected inside the regulating pipe (2) and below the through pipe (10), a second piston (27) is slidably mounted inside the second air chamber (25), an air pressure chamber (26) is provided between the second piston (27) and the partition plate (28), and the air pressure chamber (26) is communicated with the air port (22).

4. The fire valve structure with automatic liquid level control according to claim 3 is characterized in that: The assembly component (3) is fixedly connected to the water outlet pipe (9) on the fire water pipe. The assembly component (3) comprises a sliding sleeve (31). The sliding sleeve (31) is provided with a threaded hole (310). One end of the sliding sleeve (31) is fixedly connected to a flange (32). The other end is fixedly connected to a plurality of mounting plates (35). A slot (33) for mounting a rubber gasket (7) is provided in the flange (32). A spring (36) is fixedly connected to one side of the mounting plate (35). A guide rod (34) is fixedly connected to the sliding sleeve (31) in an array.

5. The fire valve structure with automatic liquid level control according to claim 4 is characterized in that: The connection assembly (4) comprises a connection shell (41) fixedly connected to one end of the valve body (1), a plurality of threaded holes (43) being provided on the connection shell (41), a sealing ring (42) being fixedly connected to the connection shell (41), a guide groove (45) being arranged in an array on the sealing ring (42), a conical tube (44) for internally connecting to a water outlet pipe (9) being fixedly connected to one end of the connection shell (41), and a guide block (46) being fixedly connected inside the connection shell (41); A filter screen (47) is installed at the axis of the guide block (46), a pin rod (48) is fixedly connected to the filter screen (47), one end of the spring (36) is connected to the sealing ring (42), a rubber gasket (7) is fixedly connected between the tapered tube (44) and the sliding sleeve (31), and the guide groove (45) cooperates with the guide rod (34).

6. The fire valve structure with automatic liquid level control according to claim 5, characterized in that: The flow guide member (8) comprises a built-in block (81), one end of the built-in block (81) is provided with a pin slot (811), the other end of the built-in block (81) is provided with a mounting hole (85), one end of the built-in block (81) is provided with a chamfer (812), the other end is fixedly connected to a plurality of support rods (84), a limit rod (86) is fixedly connected in the mounting hole (85), the outer side of the built-in block (81) is fixedly connected to a plurality of support rods (82), and the support rods (82) abut against the inner wall of the connecting shell (41); One end of the support rod (84) is fixedly connected to two fixing blocks (87), one fixing block (87) is fixedly connected to one end of a drainage tube (89), a circular groove (80) is provided at the axis of the other fixing block (87), the fixing block (87) is clamped in the mounting ring (15), a drainage tube (89) is fixedly connected between the two fixing blocks (87), a round rod (88) is installed in an array between the two fixing blocks (87), and an end of the drainage tube (89) is fixedly connected to a limiting ring (890).

7. The fire valve structure with automatic liquid level control according to claim 6, characterized in that: The control assembly (5) comprises a shaft rod (51), one end of which is fixedly connected to a round block (53), the round block (53) being slidably mounted in a mounting hole (85), one end of which is fixedly connected to a conical valve core (55) for controlling the liquid level, the conical valve core (55) cooperating with a limit ring (890), a straight groove (54) being provided on the round block (53), the straight groove (54) cooperating with a limit rod (86), and a side rod (512) being fixedly connected to the shaft rod (51).

8. The fire valve structure with automatic liquid level control according to claim 7, characterized in that: An annular valve core (56) for controlling the liquid level is fixedly connected to the side rod (512); a matching block (57) is fixedly connected to one end of the annular valve core (56); the matching groove (17) matches with the matching block (57); the annular valve core (56) is slidably installed in the circular groove (80); one end of the shaft rod (51) is connected to the shaft rod (52); the shaft rod (52) is slidably connected to the shaft hole (18); and one end of the shaft rod (52) is fixedly connected to a threaded rod (521).

9. The fire valve structure with automatic liquid level control according to claim 8, characterized in that: One side of the side rod (512) is rotatably connected to a rotating block (511), the rotating block (511) is threadedly connected to a threaded rod (521), the second shaft rod (52) penetrates and is slidably arranged on the valve body (1) and the regulating tube (2), one end of the second shaft rod (52) away from the first shaft rod (51) is fixedly connected to the first oblique rod (58), and the second shaft rod (52) is provided with a through groove (59).

10. The fire valve structure with automatic liquid level control according to claim 9, characterized in that: The piston assembly (6) comprises a piston 1 (61) and a piston 2 (27), wherein the piston 1 (61) is located in the air chamber 1 (24), and the piston 2 (27) is located below the piston 1 (61). An annular floating ball (62) for adjusting the liquid level is fixedly connected below the piston 1 (61), and a moving rod (63) is fixedly connected to the piston 1 (61); One end of the moving rod (63) is fixedly connected to the second inclined rod (64), the second inclined rod (64) is parallel to the first inclined rod (58) and is slidably connected, the moving rod (63) and the second inclined rod (64) are both slidably connected to the through groove (59), and both ends of the second inclined rod (64) are fixedly connected to limit blocks for controlling the movement of the second inclined rod (64).

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