Anti-freezing outdoor fire hydrant

Abstract

The utility model relates to fire fighting equipment technical field especially relates to a kind of anti-freezing outdoor fire hydrant, including body, the circumferential surface of body is fixedly connected with bottom plate, cavity is set in body;Lift shaft is equipped in cavity, the inner wall of body is fixedly connected with rectangular bar and fixed plate at the side below bottom plate, rectangular bar is located above fixed plate, the inner wall of rectangular bar is fixedly connected with shaft sleeve, the outer ring surface of the inner wall of shaft sleeve and lift shaft is slidably connected, lift shaft is driven to descend by spanner, fixed seat is driven to move down with connecting sleeve, so that sealing plug and plug base are closely attached, while lift shaft drives small valve and big valve to descend, water flow can be smoothly ascended for use, reverse rotation spanner makes lift shaft reset, fixed seat drives connecting sleeve and sealing plug reset, accumulated water in cavity is discharged to frozen soil layer through the gap between sealing plug and plug base through drain outlet, realize that drain outlet is closed when using, automatically drain when idle, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, and in particular to an antifreeze outdoor fire hydrant. Background Technology

[0002] Outdoor fire hydrants are fixed water supply facilities installed on the fire water supply network outside buildings. They are mainly used for fire trucks to draw water or to directly connect fire hoses for fire extinguishing. They are basic fire protection equipment, and their system consists of fire water source, pipeline network, fire hydrant body and accessories.

[0003] In cold regions, outdoor fire hydrants are exposed to low temperatures for extended periods, causing residual water inside to freeze and expand, leading to cracks in the hydrant valve body, pipes, and other components. This affects their normal use and may even require frequent repairs or replacements, increasing maintenance costs. Traditional antifreeze measures for outdoor fire hydrants often rely on insulation layers, but the insulation effect is limited, and freezing cracks cannot be avoided even in extremely low temperatures. Some fire hydrants use manual drainage valves, but this is cumbersome, and if drainage is forgotten, freezing cracks are very likely to occur. Utility Model Content

[0004] In view of the above-mentioned problem of freezing and cracking, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an anti-freeze outdoor fire hydrant, including a body, a base plate fixedly connected to the circumferential surface of the body, and a cavity inside the body; a lifting shaft is provided in the cavity, a rectangular rod and a fixing plate are fixedly connected to the inner wall of the body on one side below the base plate, the rectangular rod is located above the fixing plate, a bushing is fixedly connected to the inner wall of the rectangular rod, the inner wall of the bushing is slidably connected to the outer ring surface of the lifting shaft, a drainage channel is provided inside the rectangular rod, the drainage channel extends from the top of the rectangular rod into the rectangular rod and then radially into the body, a drainage outlet communicating with the drainage channel is provided on the circumferential surface of the body, a plug base is fixedly connected to the rectangular rod corresponding to the inlet of the drainage channel, a sealing plug is slidably connected to the inner wall of the plug base; in the initial state, there is a gap between the sealing plug and the plug base; when the sealing plug descends to a specified height, the sealing plug and the plug base are sealed together; a large valve plate that contacts the bottom end of the fixing plate is slidably connected to the outer ring surface of the lifting shaft.

[0006] As a preferred embodiment of the present invention, an antifreeze outdoor fire hydrant is provided, wherein: a fixed seat is fixedly connected to the circumferential surface of the lifting shaft on one side above the bushing, and a first spring is connected between the bottom end of the fixed seat and the top end of the bushing, and the first spring is sleeved with the lifting shaft.

[0007] As a preferred embodiment of the present invention, an antifreeze outdoor fire hydrant is provided, wherein: a connecting sleeve is fixedly connected to the inner wall of the fixed base near the drain outlet, the inner wall of the connecting sleeve is slidably connected to the circumferential surface of the sealing plug, the inner wall of the connecting sleeve is provided with a second spring that contacts the top of the sealing plug, the bottom end of the sealing plug is rounded, and the material is silicone.

[0008] As a preferred embodiment of the antifreeze outdoor fire hydrant of this utility model, the top of the large valve plate is provided with an installation groove, a first sealing ring is fixedly connected in the installation groove, a fixing ring that contacts the top of the first sealing ring is fixedly connected to the bottom of the fixing plate, and multiple evenly distributed through holes are provided at the top of the large valve plate.

[0009] As a preferred embodiment of the present invention, an antifreeze outdoor fire hydrant is provided, wherein: the inner ring surface of the large valve plate is provided with multiple evenly distributed movable grooves, a rectangular plate is slidably connected to the movable groove and fixedly connected to the circumferential surface of the lifting shaft, a small valve plate is fixedly connected to the bottom end of the lifting shaft, and a second sealing ring is fixedly connected to the top end of the small valve plate and tightly fits the bottom end of the large valve plate.

[0010] As a preferred embodiment of the present invention, an antifreeze outdoor fire hydrant is provided, wherein: a rotating plate is fixedly connected to the top of the lifting shaft, a stop post is fixedly connected to the top of the rotating plate at a non-center position, a threaded block is rotatably connected to the outer ring surface of the top of the stop post, a lifting valve rod is fixedly connected to the top of the threaded block, and the bottom end of the lifting valve rod is rotatably connected to the top of the body.

[0011] The beneficial effects of this utility model are:

[0012] The lifting shaft is lowered by using a wrench, which in turn moves the connecting sleeve downwards, ensuring a tight fit between the sealing plug and the plug base to prevent water leakage. Simultaneously, the lifting shaft lowers the small and large valves, allowing water to flow smoothly upwards for use. When not in use, the wrench is turned in the opposite direction to reset the lifting shaft, which in turn resets the connecting sleeve and sealing plug. Water accumulated in the cavity is drained through the gap between the sealing plug and the plug base into the frozen soil layer via the drain outlet. This system ensures that the drain outlet is closed when in use and automatically drains when not in use, preventing water accumulation and freezing, simplifying operation, and reducing maintenance costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the rectangular rod installation structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the threaded block installation structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the sealing plug installation structure of this utility model.

[0018] Figure 5 This is a schematic diagram of the installation structure of the small valve plate of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Body; 2. Base plate; 3. Lifting valve stem; 4. Lifting shaft; 5. Rectangular rod; 6. Fixing plate; 7. Fixing seat; 8. Drain outlet; 9. Large valve plate; 10. Threaded block; 11. Abutment; 12. Rotating plate; 13. Bushing; 14. First spring; 15. Connecting sleeve; 16. Second spring; 17. Sealing plug; 18. Plug base; 19. Fixing ring; 20. First sealing ring; 21. Through hole; 22. Rectangular plate; 23. Small valve plate; 24. Second sealing ring. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Example 1

[0022] Reference Figure 1 , Figure 2 and Figure 4 This is the first embodiment of the present invention, providing an antifreeze outdoor fire hydrant, including a body 1, a base plate 2 fixedly connected to the circumferential surface of the body 1, and a cavity inside the body 1; a lifting shaft 4 is provided inside the cavity, and a rectangular rod 5 and a fixing plate 6 are fixedly connected to the inner wall of the body 1 on the side below the base plate 2, the rectangular rod 5 being positioned above the fixing plate 6, and a bushing 13 fixedly connected to the inner wall of the rectangular rod 5, the inner wall of the bushing 13 being slidably connected to the outer ring surface of the lifting shaft 4; a drainage channel is provided inside the rectangular rod 5, and the drainage channel flows from the rectangular rod 5... The top of the rectangular rod 5 extends inward and then radially towards the body 1. A drain outlet 8 communicating with the drainage channel is provided on the circumferential surface of the body 1. A plug base 18 is fixedly connected to the rectangular rod 5 at the entrance of the drainage channel. A sealing plug 17 is slidably connected to the inner wall of the plug base 18. There is a gap between the sealing plug 17 and the plug base 18 in the initial state. When the sealing plug 17 descends to the specified height, the sealing plug 17 and the plug base 18 are sealed together. A large valve plate 9 that contacts the bottom end of the fixed plate 6 is slidably connected to the outer ring surface of the lifting shaft 4.

[0023] A fixed seat 7 is fixedly connected to the circumferential surface of the lifting shaft 4 on one side above the bushing 13. A first spring 14 is connected between the bottom end of the fixed seat 7 and the top end of the bushing 13, and the first spring 14 is sleeved with the lifting shaft 4.

[0024] A connecting sleeve 15 is fixedly connected to the inner wall of the fixed base 7 near the drain outlet 8. The inner wall of the connecting sleeve 15 is slidably connected to the circumferential surface of the sealing plug 17. The inner wall of the connecting sleeve 15 is provided with a second spring 16 that contacts the top of the sealing plug 17. The bottom end of the sealing plug 17 is rounded and made of silicone.

[0025] During use, when the fire hydrant is used, the lifting shaft 4 descends, which drives the fixed seat 7 to descend synchronously. The fixed seat 7 drives the connecting sleeve 15 to move downward along the circumference of the sealing plug 17. At the same time, the connecting sleeve 15 pushes the sealing plug 17 downward through the second spring 16, so that the sealing plug 17 fits tightly against the inner wall of the plug base 18. At this time, when the water source flows from the bottom of the body 1 to the upper branch pipe, the seamless fit between the sealing plug 17 and the plug base 18 can effectively prevent the water source from leaking from the drain outlet 8, ensuring that the water flow is not wasted during the water supply process.

[0026] When fire hydrants are not needed, the lifting shaft 4 returns to its original position under the synchronous elastic force of the first spring 14 and the second spring 16. The fixed seat 7 rises accordingly, causing the sealing plug 17 installed on the inner wall of the connecting sleeve 15 to move upward and return to its original position. Since there is a gap between the sealing plug 17 and the plug base 18 in the initial state, the unused water in the cavity will flow through the gap to the drain 8, and then be discharged to the frozen soil layer through the drain 8, thus avoiding water accumulation in the cavity and freezing, which could damage the components.

[0027] Example 2

[0028] Reference Figures 1-5 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: the top of the large valve plate 9 is provided with an installation groove, and a first sealing ring 20 is fixedly connected in the installation groove; the bottom of the fixing plate 6 is fixedly connected with a fixing ring 19 that contacts the top of the first sealing ring 20; and the top of the large valve plate 9 is provided with a plurality of evenly distributed through holes 21.

[0029] The inner ring surface of the large valve plate 9 is provided with multiple evenly distributed moving grooves. A rectangular plate 22 is slidably connected to the moving groove and fixedly connected to the circumferential surface of the lifting shaft 4. A small valve plate 23 is fixedly connected to the bottom end of the lifting shaft 4. A second sealing ring 24 that fits tightly against the bottom end of the large valve plate 9 is fixedly connected to the top end of the small valve plate 23.

[0030] A rotating plate 12 is fixedly connected to the top of the lifting shaft 4. A stop post 11 is fixedly connected to the top of the rotating plate 12 at a non-center position. A threaded block 10 is rotatably connected to the outer ring surface of the top of the stop post 11. A lifting valve rod 3 is fixedly connected to the top of the threaded block 10. The bottom end of the lifting valve rod 3 is rotatably connected to the top of the machine body 1.

[0031] During use, a specific wrench is used to rotate the lifting valve stem 3, which in turn rotates the threaded block 10. During rotation, the threaded block 10 presses against the abutment 11. The abutment 11, through the rotating plate 12, drives the lifting shaft 4 to move downward. When the lifting shaft 4 descends, the fixed seat 7 compresses the first spring 14 to make it contract. At the same time, the lifting shaft 4 first drives the small valve plate 23 to descend. At this time, the water flow can flow through the through hole 21 on the large valve plate 9 to the branch pipe.

[0032] When the rectangular plate 22 contacts the bottom of the movable trough, the lifting shaft 4 continues to descend, which will drive the large valve plate 9 to descend synchronously through the rectangular plate 22, so that the fixed ring 19 separates from the first sealing ring 20, and the water flow can rise smoothly to meet the fire water demand.

[0033] When the fire hydrant is not needed, the lifting valve stem 3 is rotated in the reverse direction. The squeezing force of the threaded block 10 on the abutment 11 disappears, and the lifting shaft 4 returns to its original position under the elastic force of the first spring 14. The lifting shaft 4 drives the large valve plate 9 to return to its original position through the rectangular plate 22, so that the fixing ring 19 and the first sealing ring 20 are re-fitted, blocking the upward flow channel of water. At the same time, the lifting shaft 4 drives the small valve plate 23 to return to its original position. The second sealing ring 24 at the top of the small valve plate 23 is tightly fitted with the bottom end of the large valve plate 9, further ensuring the water-stopping effect.

[0034] The remaining structure is the same as that in Example 1.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A frost-resistant outdoor fire hydrant, comprising a body (1), wherein a base plate (2) is fixedly connected to the circumferential surface of the body (1), and a cavity is formed inside the body (1); characterized in that: The cavity is equipped with a lifting shaft (4). A rectangular rod (5) and a fixing plate (6) are fixedly connected to the inner wall of the body (1) on one side below the bottom plate (2). The rectangular rod (5) is located above the fixing plate (6). A bushing (13) is fixedly connected to the inner wall of the rectangular rod (5). The inner wall of the bushing (13) is slidably connected to the outer ring surface of the lifting shaft (4). A drainage channel is provided inside the rectangular rod (5). The drainage channel extends from the top of the rectangular rod (5) into the rectangular rod (5) and then radially into the body (1). (1) A drain outlet (8) communicating with the drainage channel is provided on the circumferential surface of the rectangular rod (5). A plug base (18) is fixedly connected to the entrance of the drainage channel on the rectangular rod (5). A sealing plug (17) is slidably connected to the inner wall of the plug base (18). There is a gap between the sealing plug (17) and the plug base (18) in the initial state. When the sealing plug (17) descends to the specified height, the sealing plug (17) and the plug base (18) are sealed together. A large valve plate (9) that contacts the bottom end of the fixed plate (6) is slidably connected to the outer ring surface of the lifting shaft (4).

2. The antifreeze outdoor fire hydrant according to claim 1, characterized in that: A fixed seat (7) is fixedly connected to the circumferential surface of the lifting shaft (4) on one side above the bushing (13). A first spring (14) is connected between the bottom end of the fixed seat (7) and the top end of the bushing (13). The first spring (14) is sleeved with the lifting shaft (4).

3. The antifreeze outdoor fire hydrant according to claim 2, characterized in that: A connecting sleeve (15) is fixedly connected to the inner wall of the fixed base (7) near the drain outlet (8). The inner wall of the connecting sleeve (15) is slidably connected to the circumferential surface of the sealing plug (17). The inner wall of the connecting sleeve (15) is provided with a second spring (16) that contacts the top end of the sealing plug (17). The bottom end of the sealing plug (17) is rounded and made of silicone.

4. The antifreeze outdoor fire hydrant according to claim 1, characterized in that: The top of the large valve plate (9) is provided with an installation groove, and a first sealing ring (20) is fixedly connected in the installation groove. The bottom of the fixing plate (6) is fixedly connected with a fixing ring (19) that contacts the top of the first sealing ring (20). The top of the large valve plate (9) is provided with a plurality of evenly distributed through holes (21).

5. The antifreeze outdoor fire hydrant according to claim 1, characterized in that: The inner ring surface of the large valve plate (9) is provided with a plurality of evenly distributed moving grooves. A rectangular plate (22) that is fixedly connected to the circumferential surface of the lifting shaft (4) is slidably connected in the moving groove. A small valve plate (23) is fixedly connected to the bottom end of the lifting shaft (4). A second sealing ring (24) that is tightly fitted to the bottom end of the large valve plate (9) is fixedly connected to the top end of the small valve plate (23).

6. The antifreeze outdoor fire hydrant according to claim 1, characterized in that: A rotating plate (12) is fixedly connected to the top of the lifting shaft (4). A stop post (11) is fixedly connected to the top of the rotating plate (12) at a non-center position. A threaded block (10) is rotatably connected to the outer ring surface of the top of the stop post (11). A lifting valve rod (3) is fixedly connected to the top of the threaded block (10). The bottom end of the lifting valve rod (3) is rotatably connected to the top of the machine body (1).

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