Anti-freezing fire hydrant

Abstract

The invention belongs to the technical field of fire hydrants, and particularly relates to an anti-freezing fire hydrant which comprises a fire-fighting shell, an end cover is fixedly connected to the top end of the fire-fighting shell, a main pipeline and two auxiliary pipelines are arranged on the fire-fighting shell, auxiliary plugs are in threaded connection with the ends of the auxiliary pipelines, a main plug is in threaded connection with the end of the main pipeline, and a valve rod is rotationally connected to the end cover. The bottom end of the valve rod is in threaded connection with a sleeve, the bottom end of the sleeve is fixedly connected with a valve plate capable of moving up and down, a check ring is arranged in the fire-fighting shell, the valve plate can be attached to the lower surface of the check ring, a drainage pipe located above the valve plate is arranged on the side of the fire-fighting shell, and an on-off structure is arranged in the drainage pipe. According to the anti-freezing fire hydrant, after the fire hydrant is used, the check ring is blocked through resetting of the valve plate, water above the check ring is drained through an on-off structure of the drainage pipe, freezing of residual water is avoided, the fire hydrant is effectively prevented from being damaged due to expansion caused by internal freezing, and the service life of the fire hydrant in a low-temperature environment is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of fire hydrants, in particular to an antifreeze fire hydrant. Background Art

[0002] Fire hydrants are officially called fire hydrants. Their main function is to control combustible materials, isolate combustible materials and eliminate fire sources. Most fire hydrants are installed outdoors and are generally used to fill water into fire trucks. When in use, first connect the water pipe to the water outlet on the fire hydrant, and then turn on the water outlet switch on the fire hydrant to allow the water in the fire hydrant to enter the fire truck through the water pipe.

[0003] In cold regions, the proper functioning of fire hydrants is often hampered by low temperatures. After using traditional fire hydrants in winter, the residual water inside can easily freeze and expand, leading to ruptures in the hydrant casing and damage to the pipes. This not only affects the proper function of the hydrant but also increases maintenance costs and replacement frequency. Once ice and blockage occur, fire rescue efforts can be delayed, resulting in serious consequences. Therefore, improvements have been developed to address this issue. Summary of the Invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes an antifreeze fire hydrant.

[0005] The present invention provides an antifreeze fire hydrant, comprising a fire hydrant housing, wherein an end cap is fixedly connected to the top of the fire hydrant housing, a main pipe and two auxiliary pipes are provided on the fire hydrant housing, auxiliary plugs are threadedly connected to the ends of the auxiliary pipes, and the main plugs are threadedly connected to the ends of the main pipes, a valve stem is rotatably connected to the end caps, a sleeve is threadedly connected to the bottom end of the valve stem, and a valve plate that can move up and down is fixedly connected to the bottom end of the sleeve, a retaining ring is provided in the fire hydrant housing, and the valve plate can be abutted against the lower surface of the retaining ring, a drain pipe is provided on the side of the fire hydrant housing and is located above the valve plate, and an on-off structure is provided in the drain pipe; when the fire hydrant is used, the valve stem is rotated by a special tool, and under the action of the valve stem, the sleeve and the valve plate move downward, and then water in the pipeline flows into the fire hydrant housing through the retaining ring, and is connected to the main pipe through a pipe to fill the fire truck with water, and the fire hose can be directly connected to the auxiliary pipe for use, and after use, the retaining ring is blocked by resetting the valve plate, and the drain pipe is opened by the on-off structure, so that the water stored above the retaining ring can be emptied from the drain pipe, thereby achieving an antifreeze effect in winter.

[0006] Preferably, the on-off structure includes a drain plug, which is threadedly connected to the end of the drain pipe; by unscrewing the drain plug, the drain pipe can be opened to drain the water in the fire protection shell.

[0007] Preferably, the on-off structure includes a plug located in the drain pipe, an elastic connection is formed between the plug and the fire shell, a U-shaped drain hole is provided on the plug, a left push block is provided at the inner end of the plug, and a right push block is fixedly connected to the circumferential outer wall of the sleeve, and the opposite sides of the left push block and the right push block are abutted by an inclined surface; when the sleeve and the valve plate move downward, the right push block will move away from the left push block, and then under the action of the elastic force, the plug will move toward the inside of the fire shell, and then the water outlet outside the drain hole will be hidden in the drain pipe, so that when the fire hydrant is in use, the drain pipe will remain closed, on the contrary, when the fire hydrant is not in use, the right push block will push the left push block, so that the plug moves outward, and then the water outlet outside the drain hole will be exposed to the outside of the drain pipe, so that the drain pipe is in an open state, and water can be discharged from the drain hole, thereby realizing automatic drainage.

[0008] Preferably, a guide sleeve is fixedly connected to the top of the left push block, a guide column is inserted in the guide sleeve, the end of the guide column is fixedly connected to the inner wall of the fire shell, a spring is sleeved on the guide column, and the two ends of the spring are respectively fixedly connected to the guide sleeve and the fire shell; the plug can be moved laterally by cooperating with the guide sleeve and the guide column, and the plug can be driven to reset by the spring.

[0009] Preferably, a one-way valve is installed in the drainage hole; by providing the one-way valve, it is possible to ensure that the drainage hole can drain water outward normally while preventing foreign matter from entering the drainage hole.

[0010] Preferably, a sleeve is provided on the sleeve, and a pair of guide posts are fixedly connected to the bottom end of the sleeve, and a pair of guide holes are opened on the valve plate for the corresponding guide posts to pass through. A screw is threadedly connected to the sleeve, and the top end of the screw is rotatably connected to the end cover; through the cooperation of the guide posts and the guide holes, the valve plate can be limitedly moved in the up and down directions. When the temperature is very low and the water under the retaining ring freezes, the screw can be rotated by a special tool, and then the guide posts are driven to move upward through the cooperation of the screw and the sleeve until the guide holes are exposed. At this time, the staff can pour hot water into the fire shell through the secondary pipe or the main pipe, and then the hot water enters the frozen area from the guide hole, thereby achieving rapid emergency thawing.

[0011] Preferably, a protective ring capable of covering the valve stem and the screw is provided on the top of the end cover, and a detachable protective cover is provided on the protective ring, and the protective cover is made of rust-proof material; the valve stem and the screw can be shielded and protected by the protective cover, thereby effectively reducing the rust phenomenon at the connection part between the valve stem and the screw and the fire protection shell.

[0012] Preferably, the protective cover is threadedly connected to the protective ring, so that the protective cover can be quickly removed from the protective ring.

[0013] Preferably, an annular groove is provided on the outer circumferential wall of the protection ring, a rubber ring is sleeved in the annular groove, and the protection cover is fixed on the protection ring by squeezing the rubber ring; the protection cover can also be quickly removed from the protection ring.

[0014] Compared with the prior art, the present invention provides an antifreeze fire hydrant with the following beneficial effects:

[0015] 1. An antifreeze fire hydrant. After use, the valve plate is reset to block the retaining ring, and the water above the retaining ring is drained using the on-off structure of the drain pipe to prevent residual water from freezing. This effectively prevents the fire hydrant from being damaged by internal ice expansion, greatly improving the service life of the fire hydrant in low temperature environments.

[0016] 2. A frost-proof fire hydrant with an on-off mechanism that provides both manual and automatic drainage modes. The manual mode opens the drain pipe by unscrewing the drain plug, which is easy to operate. The automatic mode uses the linkage between the sleeve and the plug to automatically control the opening and closing of the drain pipe according to the use status of the fire hydrant. This eliminates the need for manual intervention, is convenient to use, and drains water promptly.

[0017] 3. An antifreeze fire hydrant. When the water under the retaining ring freezes, the screw can be turned to make the sleeve drive the guide column to move upward, exposing the guide hole, making it convenient for workers to pour hot water through the main pipe or auxiliary pipe to quickly thaw the water, ensuring that the fire hydrant can be quickly restored to use after freezing, and ensuring the timeliness of fire rescue.

[0018] 4. An antifreeze fire hydrant with a protective ring and an anti-rust protective cover to protect the valve stem and screw, reduce rust on the connection parts, reduce maintenance costs, and improve the overall reliability and durability of the fire hydrant. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an antifreeze fire hydrant proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of an antifreeze fire hydrant proposed by the present invention from a first angle;

[0021] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0022] Figure 4 This is a schematic diagram of the internal structure of an antifreeze fire hydrant proposed by the present invention from a second angle;

[0023] Figure 5 This is a schematic diagram of the internal structure of a plug for an antifreeze fire hydrant proposed by the present invention;

[0024] Figure 6 This is a schematic diagram of the installation structure of the drain plug of an antifreeze fire hydrant proposed by the present invention;

[0025] Figure 7 For the present invention Figure 2 Schematic diagram of the enlarged structure at point B.

[0026] In the figure: 1. Fire protection shell; 2. End cover; 3. Valve stem; 4. Sleeve; 5. Valve plate; 6. Retaining ring; 7. Auxiliary pipe; 8. Auxiliary plug; 9. Main pipe; 10. Main plug; 11. Sleeve plate; 12. Guide column; 13. Guide hole; 14. Screw; 15. Drain pipe; 16. Plug; 17. Drain hole; 18. Left push block; 19. Right push block; 20. Guide sleeve; 21. Guide column; 22. Spring; 23. Drain plug; 24. Protective ring; 25. Rubber ring; 26. Protective cover; 27. One-way valve. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0029] Reference Figure 1-Figure 7 , an antifreeze fire hydrant, including a fire shell 1, the top of the fire shell 1 is fixedly connected to an end cover 2, the fire shell 1 is provided with a main pipe 9 and two auxiliary pipes 7, the ends of the auxiliary pipes 7 are threadedly connected to auxiliary plugs 8, the ends of the main pipes 9 are threadedly connected to main plugs 10, the end cover 2 is rotatably connected to a valve stem 3, the bottom end of the valve stem 3 is threadedly connected to a sleeve 4, the bottom end of the sleeve 4 is fixedly connected to a valve plate 5 that can move up and down, a retaining ring 6 is provided in the fire shell 1, the valve plate 5 can be attached to the lower surface of the retaining ring 6, a drain pipe 15 is provided on the side of the fire shell 1 above the valve plate 5, and an on-off structure is provided in the drain pipe 15;

[0030] When using a fire hydrant, the valve stem 3 is rotated by a special tool. Under the action of the valve stem 3, the sleeve 4 and the valve plate 5 will move downward, and then the water in the pipeline will flow into the fire shell 1 through the retaining ring 6. The main pipe 9 is connected through a pipe to fill water for the fire truck. The fire hose can be directly connected to the auxiliary pipe 7 for use. After use, the retaining ring 6 is blocked by resetting the valve plate 5, and then the drain pipe 15 is opened through the on-off structure. In this way, the water stored above the retaining ring 6 can be drained from the drain pipe 15, thereby achieving an anti-freeze effect in winter.

[0031] In embodiment 1, the on-off structure includes a drain plug 23 , which is threadedly connected to the end of the drain pipe 15 ;

[0032] During use, the drain pipe 15 can be opened by unscrewing the drain plug 23 to drain the water in the fire protection shell 1.

[0033] In Example 2, the on-off structure includes a plug 16 located in the drain pipe 15. The plug 16 is elastically connected to the fire protection housing 1. A U-shaped drain hole 17 is formed on the plug 16. A left push block 18 is provided at the inner end of the plug 16. A right push block 19 is fixedly connected to the outer wall of the sleeve 4. The opposite sides of the left push block 18 and the right push block 19 are abutted by inclined surfaces.

[0034] During use, when the sleeve 4 and the valve plate 5 move downward, the right push block 19 will move away from the left push block 18, and then under the action of elastic force, the plug 16 will move toward the inside of the fire shell 1, and then the water outlet outside the drain hole 17 will be hidden in the drain pipe 15, so that when the fire hydrant is in use, the drain pipe 15 will remain closed. Conversely, when the fire hydrant is not in use, the right push block 19 will push the left push block 18, causing the plug 16 to move outward, and then the water outlet outside the drain hole 17 will be exposed to the outside of the drain pipe 15, so that the drain pipe 15 is in an open state, and water can be discharged from the drain hole 17, thereby realizing automatic drainage.

[0035] Among them, a guide sleeve 20 is fixedly connected to the top of the left push block 18, a guide column 21 is inserted into the guide sleeve 20, the end of the guide column 21 is fixedly connected to the inner wall of the fire protection shell 1, and a spring 22 is sleeved on the guide column 21, and the two ends of the spring 22 are fixedly connected to the guide sleeve 20 and the fire protection shell 1 respectively;

[0036] When in use, the plug 16 can be moved laterally in a limited manner by the cooperation of the guide sleeve 20 and the guide post 21 , and the plug 16 can be driven to perform a reset action by the spring 22 .

[0037] Furthermore, a one-way valve 27 is installed in the drain hole 17;

[0038] When in use, by providing the one-way valve 27 , it is possible to ensure that the drainage hole 17 can drain water outward normally while preventing foreign matter from entering the drainage hole 17 .

[0039] Among them, the sleeve 4 is provided with a sleeve plate 11, the bottom end of the sleeve plate 11 is fixedly connected to a pair of guide posts 12, the valve plate 5 is provided with a pair of guide holes 13 for the corresponding guide posts 12 to pass through, and the sleeve plate 11 is threadedly connected to a screw 14, and the top end of the screw 14 is rotatably connected to the end cover 2;

[0040] During use, the valve plate 5 can be limited in the up and down directions by the cooperation of the guide column 12 and the guide hole 13 (of course, the limitation of the valve plate 5 alone can also be achieved through other commonly used limiting structures). When the temperature is very low and the water below the retaining ring 6 freezes, the screw 14 can be rotated by a special tool, and then the guide column 12 is driven to move upward through the cooperation of the screw 14 and the sleeve 11 until the guide hole 13 is exposed. At this time, the staff can pour hot water into the fire protection shell 1 through the secondary pipe 7 or the main pipe 9, and then the hot water enters the frozen area from the guide hole 13, thereby achieving rapid emergency thawing.

[0041] Furthermore, a protective ring 24 capable of enclosing the valve stem 3 and the screw 14 is provided at the top of the end cap 2. A detachable protective cover 26 is provided on the protective ring 24. The protective cover 26 is made of rust-proof material.

[0042] When in use, the protective cover 26 can shield and protect the valve stem 3 and the screw 14, thereby effectively reducing the rust phenomenon at the connection parts of the valve stem 3 and the screw 14 and the fire protection housing 1.

[0043] In embodiment 3, the protective cover 26 is threadedly connected to the protective ring 24;

[0044] When in use, the protective cover 26 can be quickly removed from the protective ring 24.

[0045] In embodiment 4, an annular groove is provided on the outer circumference of the protection ring 24, a rubber ring 25 is sleeved in the annular groove, and the protection cover 26 is fixed on the protection ring 24 by squeezing the rubber ring 25;

[0046] During use, the protective cover 26 can also be quickly removed from the protective ring 24 .

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An antifreeze fire hydrant, comprising a fire protection housing (1), characterized in that: The top of the fire-fighting shell (1) is fixedly connected to an end cover (2), and a main pipe (9) and two auxiliary pipes (7) are provided on the fire-fighting shell (1). The ends of the auxiliary pipes (7) are threadedly connected to auxiliary plugs (8), and the ends of the main pipes (9) are threadedly connected to main plugs (10). A valve stem (3) is rotatably connected to the end cover (2), and a sleeve (4) is threadedly connected to the bottom end of the valve stem (3). A valve plate (5) capable of moving up and down is fixedly connected to the bottom end of the sleeve (4). A retaining ring (6) is provided in the fire-fighting shell (1), and the valve plate (5) can be attached to the lower surface of the retaining ring (6). A drainage pipe (15) located above the valve plate (5) is provided on the side of the fire-fighting shell (1), and an on-off structure is provided in the drainage pipe (15).

2. The antifreeze fire hydrant according to claim 1, characterized in that: The on-off structure comprises a drain plug (23), which is threadedly connected to the end of the drain pipe (15).

3. The antifreeze fire hydrant according to claim 1, characterized in that: The on-off structure comprises a plug (16) located in the drain pipe (15), an elastic connection is formed between the plug (16) and the fire protection shell (1), a U-shaped drain hole (17) is provided on the plug (16), a left push block (18) is provided at the inner end of the plug (16), a right push block (19) is fixedly connected to the outer wall of the sleeve (4), and the opposite sides of the left push block (18) and the right push block (19) are abutted by an inclined surface.

4. The antifreeze fire hydrant according to claim 3, characterized in that: The top of the left push block (18) is fixedly connected with a guide sleeve (20), a guide column (21) is inserted into the guide sleeve (20), the end of the guide column (21) is fixedly connected to the inner wall of the fire protection shell (1), and a spring (22) is sleeved on the guide column (21), and the two ends of the spring (22) are fixedly connected to the guide sleeve (20) and the fire protection shell (1) respectively.

5. The antifreeze fire hydrant according to claim 3, characterized in that: A one-way valve (27) is installed in the drainage hole (17).

6. The antifreeze fire hydrant according to claim 1, characterized in that: The sleeve (4) is provided with a sleeve plate (11), the bottom end of the sleeve plate (11) is fixedly connected to a pair of guide columns (12), the valve plate (5) is provided with a pair of guide holes (13) for the corresponding guide columns (12) to pass through, the sleeve plate (11) is threadedly connected to a screw rod (14), and the top end of the screw rod (14) is rotatably connected to the end cover (2).

7. The antifreeze fire hydrant according to claim 1, characterized in that: The top end of the end cover (2) is provided with a protective ring (24) capable of enclosing the valve stem (3) and the screw (14); a detachable protective cover (26) is provided on the protective ring (24); and the protective cover (26) is made of rust-proof material.

8. The antifreeze fire hydrant according to claim 7, characterized in that: The protective cover (26) is threadedly connected to the protective ring (24).

9. The antifreeze fire hydrant according to claim 7, characterized in that: An annular groove is provided on the circumferential outer wall of the protection ring (24), a rubber ring (25) is sleeved in the annular groove, and the protection cover (26) is fixed on the protection ring (24) by squeezing the rubber ring (25).

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