Quick-connection fire hydrant for tunnel

Abstract

The utility model provides a quick connection type fire hydrant for a tunnel. The problem that an opening and closing valve screw of an existing tunnel fire hydrant in a semi-outdoor environment is prone to rusting or poor in lubrication, and consequently opening is difficult is solved. Comprising a fire hydrant cabinet installed on a tunnel wall, a fire hydrant is arranged in the fire hydrant cabinet, the water inlet end of the fire hydrant is connected with a fire hose, and the fire hydrant comprises a valve body and a valve element assembly arranged in the valve body; the valve element assembly comprises a first push rod and a second push rod which are rotationally connected, a valve element used for controlling on-off of the valve body is installed at the lower end of the second push rod, the top end of the first push rod extends out of the top end of the valve body, a limiting block is further arranged on the outer wall of the first push rod, a sliding groove block is installed on the inner side wall of the valve body, and an L-shaped sliding groove is formed in the sliding groove block. The limiting block slides along the L-shaped sliding groove. The opening and closing mode of the fire hydrant is simple and short in time consumption, and control over fire behaviors is facilitated. Meanwhile, the service life is long, and reliability and stability are high.

Description

Technical Field

[0001] The utility model relates to the field of fire fighting equipment, in particular to a quick-connect fire hydrant used in a tunnel. Background Art

[0002] Tunnels are semi-enclosed environments with poor ventilation, especially in long tunnels where fans are required for auxiliary ventilation. When a fire occurs in a tunnel, smoke will quickly spread into the tunnel, causing difficulties for passing vehicles or fire rescue. Therefore, the initial identification and extinguishing of tunnel fires become an important part of tunnel firefighting. Therefore, existing tunnels are equipped with several box-type fire hydrants on the tunnel walls so that fire hydrants can be quickly found for fire extinguishing in the event of a fire.

[0003] The existing building fire protection system needs to pump fire water to a high place, so it is necessary to maintain a high pressure in the fire protection pipe. Therefore, the fire hydrant needs to use a screw-type on-off valve to ensure that it can be opened smoothly. In the tunnel fire protection system, the fire hydrants are all set on the same plane or multiple planes with a small elevation difference. The pressure required for water supply is relatively small, and the water inlet of the fire protection system is mostly supplied by gravity flow of mountain streams or mountain pools. The use of screw-type on-off valves in tunnels has low opening and closing efficiency and long opening and closing time. Moreover, in semi-outdoor environments such as tunnels, when the on-off valve is used less frequently, the on-off valve screw is prone to rust and poor lubrication, making it difficult to open and close the on-off valve or difficult to open. Utility Model Content

[0004] The purpose of the utility model is to provide a quick-connect fire hydrant for tunnels, which is used to solve the problem that the screw rod of the opening and closing valve of the existing tunnel fire hydrant is easy to rust or poorly lubricated in a semi-outdoor environment, making it difficult to open.

[0005] A quick-connect fire hydrant for a tunnel, comprising a fire hydrant box installed on a tunnel wall, a fire hydrant arranged in the fire hydrant box, a water inlet end of the fire hydrant connected to a fire water pipe, the fire hydrant comprising a valve body, and a valve core assembly arranged in the valve body;

[0006] The valve core assembly includes a first push rod and a second push rod which are rotatably connected. The lower end of the second push rod is equipped with a valve core for controlling the on and off of the valve body. The top end of the first push rod extends out of the top end of the valve body. A limit block is also provided on the outer wall of the first push rod. A slide block is installed on the inner side wall of the valve body. The slide block is provided with an L-shaped slide groove, and the limit block slides along the L-shaped slide groove.

[0007] Optionally, the valve body includes a first connecting pipe, a spherical connecting pipe and a second connecting pipe connected in sequence;

[0008] The top of the second connecting pipe is sealed, a water outlet is provided on the side wall of the second connecting pipe, a sealing plate is installed on the second connecting pipe above the water outlet, and a closed installation cavity is formed between the sealing plate and the top plate of the second connecting pipe;

[0009] The connecting ends of the first push rod and the second push rod, as well as the limit block and the slide block are all located in the installation cavity, and the lower end of the second push rod is slidably sealed through the sealing plate to be connected to the valve core.

[0010] Optionally, the valve core is a spherical valve core, and the valve core is located in the spherical connecting pipe;

[0011] The ball radius of the valve core is larger than the radius of the second connecting pipe and smaller than the ball radius of the spherical connecting pipe. A sealing rubber ring is also arranged on the outer wall of the valve core.

[0012] Optionally, a first disc is mounted on the lower end of the first push rod;

[0013] A second disc is installed at the upper end of the second push rod. A circular limiting hole with an inverted T-shaped cross section is opened on the second disc. The first disc is rotatably arranged in the circular limiting hole.

[0014] Optionally, a guide rod is further arranged in the installation cavity along the vertical direction, and two ends of the guide rod are respectively installed on the sealing plate and the top plate;

[0015] The guide rod is slidably connected to the second disc, a spring is sleeved on the outer wall of the guide rod, and the spring is located between the second disc and the sealing plate. When the valve core contacts the lower end surface of the second connecting pipe, the spring is in a compressed state.

[0016] Optionally, the number of the guide rods and the number of the slide blocks are both two;

[0017] The two groups of guide rods and the two groups of slide block are alternately arranged along the circular axis of the second connecting pipe and rotated by 90 degrees in sequence.

[0018] Optionally, the water outlet is connected with a quick-connect connector.

[0019] Optionally, a circular wheel disc is installed on the upper end of the first push rod after passing through the top plate.

[0020] Optionally, a guiding bevel is provided at a corner position of the L-shaped slide groove.

[0021] Optionally, a fire hose and a fire hose gun are also provided in the fire hydrant box.

[0022] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0023] 1. This application aims at the use scenario where the fire-fighting pipe pressure of the tunnel fire-fighting system is relatively low, and sets a rotary on-off valve when pressed down to ensure that the user can smoothly open the fire hydrant. The fire hydrant is opened by pressing down the first push rod and the second push rod, and the first push rod is rotated to make the limit block stuck in the horizontal groove of the L-shaped slide groove to achieve the limit of the valve core assembly. The entire opening process only requires pressing down and rotating the first push rod at a small angle. The operation is simple, time-saving, and conducive to the control of the initial fire.

[0024] 2. This application has solved the problem that the screw of the traditional on-off valve is easy to rust and the lubrication effect is poor when it is not used for a long time, which leads to difficulty in opening and closing or difficult to open. It has a longer service life and high stability and reliability.

[0025] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings of the present utility model are described as follows.

[0027] Figure 1 The utility model is a schematic structural diagram of a quick-connect fire hydrant used in a tunnel.

[0028] Figure 2 It is a structural schematic diagram of the fire hydrant of the utility model.

[0029] Figure 3 It is a cross-sectional view of the fire hydrant of the utility model.

[0030] Figure 4 It is a structural schematic diagram of the valve core assembly of the utility model.

[0031] Figure 5 It is a schematic structural diagram of the second push rod, the second disc and the valve core of the utility model.

[0032] Figure 6 It is a schematic structural diagram of the first push rod, the circular wheel disc and the first disc of the utility model.

[0033] Figure 7 It is a structural schematic diagram of the slide block of the utility model.

[0034] In the figure: 1-fire hydrant box; 2-fire water pipe; 3-valve body; 301-first connecting pipe; 302-spherical connecting pipe; 303-second connecting pipe; 304-water outlet; 305-sealing plate; 306-top plate; 307-installation cavity; 308-quick connector; 401-first push rod; 402-second push rod; 403-valve core; 404-limiting block; 405-slide block; 406-L-shaped slide; 407-first disc; 408-second disc; 409-circular limiting hole; 410-guide rod; 411-spring; 412-circular wheel; 4061-guide bevel; 5-fire hose; 6-fire water gun. DETAILED DESCRIPTION

[0035] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0036] Example:

[0037] like Figure 1 , Figure 2 , Figure 3 and Figure 4 A quick-connect fire hydrant for a tunnel is shown, comprising a fire hydrant box 1 installed on a tunnel wall, a fire hydrant is arranged in the fire hydrant box 1, a water inlet end of the fire hydrant is connected to a fire water pipe 2, and the fire hydrant comprises a valve body 3 and a valve core assembly arranged in the valve body 3;

[0038] The valve core assembly includes a first push rod 401 and a second push rod 402 which are rotatably connected. The lower end of the second push rod 402 is equipped with a valve core 403 for controlling the on and off of the valve body 3. The top end of the first push rod 401 extends out of the top end of the valve body 3. A limit block 404 is also provided on the outer wall of the first push rod 401. A slide block 405 is installed on the inner side wall of the valve body 3. An L-shaped slide groove 406 is provided on the slide block 405. The limit block 404 slides along the L-shaped slide groove 406.

[0039] like Figure 7 As shown, a guiding bevel 4061 is provided at the corner position of the L-shaped slide groove 406 .

[0040] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the valve body 3 includes a first connecting pipe 301, a spherical connecting pipe 302 and a second connecting pipe 303 which are connected in sequence;

[0041] The top of the second connecting pipe 303 is sealed, a water outlet 304 is provided on the side wall of the second connecting pipe 303, a sealing plate 305 is installed on the second connecting pipe 303 above the water outlet 304, and a sealed installation cavity 307 is formed between the sealing plate 305 and the top plate 306 of the second connecting pipe 303;

[0042] The connecting ends of the first push rod 401 and the second push rod 402 , the limit block 404 , and the slide block 405 are all located in the installation cavity 307 , and the lower end of the second push rod 402 is slidably sealed through the sealing plate 305 to be connected to the valve core 403 .

[0043] In this embodiment, a sealing ring is arranged between the second push rod 402 and the sealing plate 305, so that the second push rod 402 and the connecting ends of the first push rod 401 and the second push rod 402 are all located in the closed installation cavity 307, reducing the impact of the external environment on them, and having a longer service life, good stability and high reliability.

[0044] In this embodiment, at the initial moment, the sealing rubber ring (not shown in the figure) at the upper end of the valve core 403 contacts the lower end surface of the second connecting pipe 303, and the fire hydrant is closed. When it is necessary to extinguish a fire, the first push rod 401 is pressed down, and the limit block 404 slides downward along the vertical groove of the L-shaped slide groove 406. The first push rod 401 pushes the second push rod 402 and the valve core 403 to move downward, and the fire hydrant is opened. When the lower end surface of the limit block 404 contacts the lower end surface of the horizontal groove of the L-shaped slide groove 406, the first push rod 401 is rotated, and the limit block 404 is inserted into the horizontal groove of the L-shaped slide groove 406. When use is completed, the above steps are performed in reverse to close the fire hydrant.

[0045] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a first disc 407 is installed at the lower end of the first push rod 401;

[0046] A second disc 408 is mounted on the upper end of the second push rod 402 . A circular limiting hole 409 with an inverted T-shaped cross section is formed on the second disc 408 . The first disc 407 is rotatably disposed in the circular limiting hole 409 .

[0047] like Figure 2 , Figure 3 and Figure 6 As shown, the upper end of the first push rod 401 passes through the top plate 306 and is equipped with a circular wheel 412 .

[0048] In this embodiment, the first push rod 401 and the second push rod 402 are rotatably connected by providing a circular limiting hole 409 and a first disc 407 . When the first push rod 401 is driven to rotate by the circular wheel disc 412 , the second push rod 402 does not rotate with the first push rod 401 .

[0049] like Figure 3 and Figure 4 As shown, a guide rod 410 is also provided in the installation cavity 307 along the vertical direction, and both ends of the guide rod 410 are respectively installed on the sealing plate 305 and the top plate 306;

[0050] The guide rod 410 is slidably connected to the second disc 407. A spring 411 is sleeved on the outer wall of the guide rod 410. The spring 411 is located between the second disc 408 and the sealing plate 305. When the valve core 403 contacts the lower end surface of the second connecting pipe 303, the spring 411 is in a compressed state.

[0051] like Figure 3 and Figure 4 As shown, the valve core 403 is a spherical valve core, and the valve core 403 is located in the spherical connecting pipe 302;

[0052] The spherical radius of the valve core 403 is larger than the radius of the second connecting tube 303 and smaller than the spherical radius of the spherical connecting tube 302 . A sealing rubber ring is also provided on the outer wall of the valve core 403 .

[0053] In this embodiment, at the initial moment, the sealing rubber ring (not shown in the figure) at the upper end of the valve core 403 contacts the lower end surface of the second connecting tube 303. At this time, the spring 411 is in a compressed state, thereby achieving the closure of the fire hydrant. When the valve core 403 moves downward, the sealing rubber ring is separated from the lower end of the second connecting tube 303. At this time, the fire hydrant is not opened.

[0054] As an embodiment of the present application, Figure 3 As shown, the number of the guide rods 410 and the slide block 405 are both two groups;

[0055] The two groups of guide rods 410 and the two groups of slide block 405 are alternately arranged along the circular axis of the second connecting pipe 303 and rotated by 90 degrees in sequence.

[0056] like Figure 1 As shown, the water outlet 304 is connected to a quick-connect connector 308 ; a fire hose 5 and a fire hose gun 6 are also provided in the fire hydrant box 1 .

[0057] In this embodiment, when a fire occurs, one end of the fire hose 5 is connected to the quick-connect connector 308, the other end of the fire hose 5 is connected to the fire hose 6, and the valve core 403 of the fire hydrant is opened to extinguish the fire.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A quick-connect fire hydrant for a tunnel, comprising a fire hydrant box (1) installed on a tunnel wall, wherein a fire hydrant is arranged in the fire hydrant box (1), and a water inlet end of the fire hydrant is connected to a fire water pipe (2), characterized in that: The fire hydrant comprises a valve body (3) and a valve core assembly arranged in the valve body (3); The valve core assembly comprises a first push rod (401) and a second push rod (402) which are rotatably connected, the lower end of the second push rod (402) is provided with a valve core (403) for controlling the on and off of the valve body (3), the top end of the first push rod (401) extends out of the top end of the valve body (3), a limit block (404) is also provided on the outer wall of the first push rod (401), a slide block (405) is installed on the inner wall of the valve body (3), an L-shaped slide block (406) is provided on the slide block (405), and the limit block (404) slides along the L-shaped slide block (406).

2. A quick-connect fire hydrant for use in a tunnel according to claim 1, characterized in that: The valve body (3) comprises a first connecting pipe (301), a spherical connecting pipe (302) and a second connecting pipe (303) which are connected in sequence; The top end of the second connecting pipe (303) is sealed, a water outlet (304) is provided on the side wall of the second connecting pipe (303), a sealing plate (305) is installed on the second connecting pipe (303) above the water outlet (304), and a sealed installation cavity (307) is formed between the sealing plate (305) and the top plate (306) of the second connecting pipe (303); The connecting ends of the first push rod (401) and the second push rod (402), as well as the limit block (404) and the slide block (405) are all located in the installation cavity (307), and the lower end of the second push rod (402) is slidably sealed through the sealing plate (305) and connected to the valve core (403).

3. A quick-connect fire hydrant for use in a tunnel according to claim 2, characterized in that: The valve core (403) is a spherical valve core, and the valve core (403) is located in the spherical connecting pipe (302); The spherical radius of the valve core (403) is greater than the radius of the second connecting tube (303) and smaller than the spherical radius of the spherical connecting tube (302), and a sealing rubber ring is also provided on the outer wall of the valve core (403).

4. A quick-connect fire hydrant for use in a tunnel according to claim 2, characterized in that: A first disc (407) is mounted on the lower end of the first push rod (401); A second disc (408) is mounted on the upper end of the second push rod (402). A circular limiting hole (409) with an inverted T-shaped cross section is formed on the second disc (408). The first disc (407) is rotatably disposed in the circular limiting hole (409).

5. A quick-connect fire hydrant for use in a tunnel according to claim 4, characterized in that: A guide rod (410) is also arranged in the installation cavity (307) along the vertical direction, and two ends of the guide rod (410) are respectively installed on the sealing plate (305) and the top plate (306); The guide rod (410) is slidably connected to the second disc (407), and a spring (411) is sleeved on the outer wall of the guide rod (410). The spring (411) is located between the second disc (408) and the sealing plate (305). When the valve core (403) contacts the lower end surface of the second connecting pipe (303), the spring (411) is in a compressed state.

6. A quick-connect fire hydrant for use in a tunnel according to claim 5, characterized in that: The number of the guide rods (410) and the number of the slide block (405) are both two groups; The two groups of guide rods (410) and the two groups of slide slot blocks (405) are alternately arranged along the circular axis of the second connecting tube (303) and rotated by 90 degrees in sequence.

7. A quick-connect fire hydrant for use in a tunnel according to claim 2, characterized in that: The water outlet (304) is connected to a quick-connect connector (308).

8. A quick-connect fire hydrant for use in a tunnel according to claim 1, characterized in that: A circular wheel disc (412) is installed on the upper end of the first push rod (401) after passing through the top plate (306).

9. A quick-connect fire hydrant for use in a tunnel according to claim 1, characterized in that: A guiding bevel (4061) is provided at the turning corner of the L-shaped sliding groove (406).

10. A quick-connect fire hydrant for use in a tunnel according to claim 1, characterized in that: A fire hose (5) and a fire hose gun (6) are also arranged in the fire hydrant box (1).

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