Anti-freezing fire hydrant structure

Abstract

The utility model discloses an anti-freezing fire hydrant structure which comprises a hydrant column body with an inner flow channel, the hydrant column body is provided with a water outlet column head and a hydrant cover assembly, the hydrant cover assembly is provided with a switch structure, and the lower end of the switch structure is connected with a valve rod used for being matched with the hydrant column body to control circulation and cut-off of water in the inner flow channel. The plug column body is further provided with a second plug body, and a drainage port is formed in the second plug body. When the fire hydrant structure is in a non-water-outlet state, conduction of media in the inner flow channel is cut off, meanwhile, the blocking ring ascends to open the drainage port, water liquid intercepted on the upper side of the sealing seat of the inner flow channel leaks and is drained out of the fire hydrant from the drainage port, the sealing core ascends during water outlet, the blocking ring blocks the drainage port along with weight reduction, and therefore the fire hydrant structure is protected. Therefore, water in the fire hydrant can be discharged when the fire hydrant is not used, and the fire hydrant is prevented from being damaged due to freezing of the water in winter.

Description

Technical Field

[0001] This utility model relates to the field of fire hydrant technology, specifically to a fire hydrant structure that is resistant to freezing damage. Background Technology

[0002] A fire hydrant, formally known as a fire hose, is a fixed fire-fighting facility whose main function is to control combustibles, isolate oxidizers, and eliminate ignition sources. Fire hydrants are classified into indoor and outdoor types based on their application. They primarily allow fire trucks to draw water from municipal water supply networks or outdoor fire water supply networks for firefighting, and can also be directly connected to hoses and nozzles for fire suppression.

[0003] In winter, outdoor temperatures are very low, especially in northern regions. Fire hydrants are typically buried below the frost line, and the water pressure within the pipes helps prevent the water from freezing. However, the water in fire hydrants above ground is almost stagnant and easily freezes in the low outdoor temperatures. This freezing can lead to two problems: first, the hydrant cannot be opened when a fire urgently needs to be extinguished, rendering it unusable; second, ice expands and can cause the hydrant to crack. Utility Model Content

[0004] The purpose of this utility model is to provide a fire hydrant structure that prevents freezing damage. By setting up a structure to discharge internal fluid, the fire hydrant is prevented from freezing and being damaged at low temperatures.

[0005] The technical solution adopted by this utility model is as follows: a fire hydrant structure that is resistant to freezing, including a hydrant column with an inner flow channel, a water outlet head and a hydrant cover assembly on the hydrant column, a switch structure on the hydrant cover assembly, and a valve stem connected to the lower end of the switch structure for cooperating with the hydrant column to control the flow and cut off of water in the inner flow channel. The hydrant column is also provided with a second hydrant body, and the second hydrant body is provided with a drain port.

[0006] As a further provision of the above scheme, the second plug body is provided with a sealing seat, the end of the valve stem is provided with a sealing core that matches the sealing seat, and the drain port is located on the upper side of the sealing seat, connecting the inner cavity of the second plug body to the outside.

[0007] As a further provision of the above scheme, the valve stem includes a rotating internal threaded rod and an external threaded rod fixed to the sealing core. The external threaded rod is also fitted with a circumferential limiting cylinder, which includes a flange outer ring fixedly disposed relative to the bolt body and a second bolt body.

[0008] As a further provision of the above scheme, a blocking ring is provided on the outer side of the sealing seat, a hanging ring is provided on the blocking ring, a traction ring is provided on the sealing core, a reversing ring is provided on the outer ring of the flange, and a traction cable is also provided that bypasses the reversing ring. The two ends of the traction cable are fixed on the hanging ring and the traction ring.

[0009] As a further provision of the above scheme, the second plug body is provided with an installation groove on the outer side of the drain port, and an anti-backflow filter column is provided in the installation groove. A cable tie for tightening the anti-backflow filter column and the second plug body is also provided on the body of the second plug body.

[0010] Beneficial effects: The fire hydrant structure of this utility model, by setting a second hydrant column, enables the sealing seat and sealing core located on the second hydrant body to seal and cut off the medium flow in the internal channel when the water is not flowing. At the same time, a plug ring is set up in conjunction with the sealing core. When the seal is cut off, the plug ring rises and opens the drain port. At this time, after the internal flow is cut off, the remaining water on the upper side of the sealing seat leaks out of the fire hydrant from the drain port. When water is flowing, the rising sealing core causes the plug ring to fall down with its weight and block the drain port. Thus, the water in the fire hydrant can be discharged when it is not in use, and the water can be prevented from freezing and damaging the fire hydrant in winter. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the fire hydrant structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the interior of a fire hydrant in this embodiment.

[0013] Reference numerals: 1. Bolt body; 2. Inner flow channel; 3. Outlet column head; 4. Bolt cover assembly; 5. Switch structure; 6. Second bolt body; 60. Plug ring; 601. Hanging ring; 602. Traction ring; 603. Traction cable; 61. Drain port; 62. Sealing seat; 63. Sealing core; 64. Reversing ring; 65. Flange outer ring; 66. Circumferential limiting cylinder; 67. External threaded rod; 68. Internal threaded rod; 69. Mounting groove; 691. Anti-backflow filter column; 692. Cable tie; 7. Valve stem. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0015] like Figure 1-2The diagram shows a fire hydrant structure designed to prevent freezing. The fire hydrant structure includes a hydrant column 1 with an inner flow channel 2. The hydrant column 1 is equipped with a water outlet head 3 and a hydrant cover assembly 4. The hydrant cover assembly 4 is equipped with a switch structure 5. A valve stem 7 is connected to the lower end of the switch structure 5 to cooperate with the hydrant column 1 in controlling the flow and cut-off of water in the inner flow channel 2. The hydrant column 1 also includes a second hydrant body 6, which has a drain port 61.

[0016] As a further provision of the above scheme, the second plug body 6 is provided with a sealing seat 62, and the end of the valve stem 7 is provided with a sealing core 63 that matches the sealing seat 62. The drain port 61 is located on the upper side of the sealing seat 62 and connects the inner cavity of the second plug body 6 with the outside.

[0017] As a further provision of the above scheme, the valve stem 7 includes a rotating internal thread rod 68 and an external thread rod 67 fixed to the sealing core 63. The external thread rod 67 is also fitted with a circumferential limiting cylinder 66. The circumferential limiting cylinder 66 includes a flange outer ring 65 fixedly disposed relative to the bolt body 1 and the second bolt body 6.

[0018] As a further provision of the above scheme, a blocking ring 60 is provided on the outer side of the sealing seat 62, a hanging ring 601 is provided on the blocking ring 60, a traction ring 602 is provided on the sealing core 63, a reversing ring 64 is provided on the outer ring 65 of the flange, and a traction cable 603 is provided that passes around the reversing ring 64. The two ends of the traction cable 603 are fixed on the hanging ring 601 and the traction ring 602.

[0019] As a further provision of the above scheme, the second throttle body 6 is provided with an installation groove 69 on the outer side of the drain port 61, and an anti-backflow filter column 691 is provided in the installation groove 69. A cable tie 692 for tightening the anti-backflow filter column 691 and the second throttle body 6 is also provided on the outside of the second throttle body 6.

[0020] Example:

[0021] refer to Figure 1 The fire hydrant of this utility model shown includes a ground-level hydrant post 1 and a second hydrant body 6 buried underground during installation. In this embodiment, a sealing seat 62 is provided on the second hydrant body 6. Figure 2 As shown, during use, the internal threaded rod 68, which is axially fixed on the bolt body 1 and rotates circumferentially relative to the bolt body 1, is rotated by the bolt cap assembly 4. When the internal threaded rod 68 rotates in both directions, the external threaded rod 67 moves up and down relative to the sealing seat 62 based on the threaded engagement. The sealing core 63 fixed at the end of the external threaded rod 67 engages with the sealing seat 62 to achieve sealing engagement, thereby achieving the cut-off and conduction of the internal flow channel 2.

[0022] It is worth noting that the upper end of the aforementioned external threaded rod 67 has a threaded portion that extends into the inner hole of the internal threaded rod 68. A circumferential limiting sleeve 66 is provided on the flange outer ring 65, which is fixedly set relative to the second bolt body 6 and the bolt post body 1. The circumferential limiting sleeve 66 is circumferentially fixedly sleeved on the external threaded rod 67, and the external threaded rod 67 is locked by the circumferential limiting sleeve 66. A locking block is provided on the inner ring of the circumferential limiting sleeve 66, and an axial sliding groove is provided on the opposite outer side of the external threaded rod 67. Under the drive of the internal threaded rod 68, the external threaded rod 67 drives the sealing core 63 to move axially through the threaded engagement.

[0023] As described above, in this embodiment, the sealing core 63 is provided with a traction ring 602. The traction ring 602 is fixed with a traction cable 603 that extends upward and wraps around the reversing ring 64, and then extends downward and connects to the hanging ring 601 provided on the plug ring 60. The two ends of the traction cable 603 are connected to the sealing core 63 and the plug ring 60. When the sealing core 63 is driven to rise by the external threaded rod 67, the plug ring 60 moves downward based on its own gravity, thereby blocking the drain port 61 on the inner wall of the second plug body 6.

[0024] In this embodiment, the second plug body 6 is provided with an installation groove 69, and an anti-backflow filter column 691 is provided in the installation groove 69. In this embodiment, a cable tie 692 is provided on the outer sleeve of the second plug body 6 to secure the second plug body 6 and the anti-backflow filter column 691, so that the anti-backflow filter column 691 is stably installed in the installation groove 69. The anti-backflow filter column 691 can prevent the mud and sand outside the second plug body 6 from flowing back into the second plug body 6.

[0025] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fire hydrant structure resistant to freezing damage, characterized in that: The device includes a plug body (1) with an inner flow channel (2), a water outlet head (3) and a plug cover assembly (4) on the plug body (1), a switch structure (5) on the plug cover assembly (4), and a valve stem (7) connected to the lower end of the switch structure (5) for cooperating with the plug body (1) to control the flow and cut off of water in the inner flow channel (2). The plug body (1) also includes a second plug body (6), and the second plug body (6) is provided with a drain port (61).

2. The fire hydrant structure for preventing frost damage according to claim 1, characterized in that: The second plug body (6) is provided with a sealing seat (62), and the end of the valve stem (7) is provided with a sealing core (63) that matches the sealing seat (62). The drain port (61) is located on the upper side of the sealing seat (62) and connects the inner cavity of the second plug body (6) with the outside.

3. The fire hydrant structure for preventing frost damage according to claim 2, characterized in that: The valve stem (7) includes a rotating internal thread rod (68) and an external thread rod (67) fixed to the sealing core (63). The external thread rod (67) is also fitted with a circumferential limiting cylinder (66). The circumferential limiting cylinder (66) includes a flange outer ring (65) fixedly arranged relative to the bolt body (1) and the second bolt body (6).

4. The fire hydrant structure for preventing frost damage according to claim 3, characterized in that: The sealing seat (62) is also provided with a blocking ring (60) on the outside, a hanging ring (601) is provided on the blocking ring (60), a traction ring (602) is provided on the sealing core (63), a reversing ring (64) is provided on the outer ring (65) of the flange, and a traction cable (603) is provided that passes around the reversing ring (64). The two ends of the traction cable (603) are fixed on the hanging ring (601) and the traction ring (602).

5. The fire hydrant structure for preventing frost damage according to claim 1, characterized in that: The second plug body (6) is provided with an installation groove (69) on the outer side of the drain port (61). The installation groove (69) is provided with an anti-backflow filter column (691). A cable tie (692) for tightening the anti-backflow filter column (691) and the second plug body (6) is also provided on the outside of the second plug body (6).

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