Adjustable fire hydrant key

Abstract

The utility model discloses an adjustable fire hydrant key which relates to the technical field of fire-fighting equipment and comprises a shell, a first clamping block and a second clamping block, a fixing block is installed inside the shell, a groove body is formed in the middle of the fixing block, a bidirectional lead screw and an adjusting wheel are arranged, the bidirectional lead screw can be driven to rotate by shifting the adjusting wheel, and the adjustable fire hydrant key is convenient to adjust. The two-way screw rod rotates to drive the first clamping block and the second clamping block to adjust the distance so as to adapt to fire hydrant valve rod nuts of different specifications, so that the fire hydrant valve rod nut clamping device is wider in application range and higher in practicability, and the outer shell, the fixing block, the first clamping block, the second clamping block and the rocker are matched with one another, so that the practicability is improved. The valve rod nut of the fire hydrant can be screwed in a hand-cranking mode, so that the water flow amount and on-off of the fire hydrant are controlled, the V-shaped clamping groove is formed in the clamping block, the adaptability of the clamping block and the valve rod nut of the fire hydrant is higher, and the situation that the clamping block slips in the rotating process, and force is difficult to apply effectively is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting equipment, in particular to an adjustable fire hydrant key. Background Technique

[0002] A fire hydrant is a fixed fire-fighting facility, and its main functions are to control combustibles, isolate combustion-supporting substances, and eliminate ignition sources. Fire hydrants are mainly divided into indoor fire hydrants and outdoor fire hydrants. Among them, the outdoor fire hydrant is a water supply facility installed on the outdoor fire water supply pipe network of a building. It is mainly used for fire trucks to draw water from the municipal water supply pipe network or the outdoor fire water supply pipe network to implement fire fighting, and can also be directly connected to a water hose and a water gun to spray water for fire fighting. It is one of the important fire-fighting facilities for extinguishing fires.

[0003] The valve stem nut is a nut fixed to the valve stem of the outdoor fire hydrant, which plays a role in keeping the position of the valve stem unchanged and ensuring the normal operation of the outdoor fire hydrant. By rotating the nut, the fire hydrant valve can be opened or closed to control the on-off of the water flow. The existing key for opening the fire hydrant is mainly a wrench. However, the size of the existing wrench is usually fixed and can only be used for the valve stem nut of a fixed specification of the fire hydrant. The sizes of the valve stem nuts on outdoor fire hydrants vary due to different manufacturers and models. Therefore, the existing fire hydrant wrench cannot be adjusted, has a small application range, and its practicability is not strong enough. Content of the Utility Model

[0004] The purpose of the utility model is to provide an adjustable fire hydrant key to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An adjustable fire hydrant key includes a housing, a first clamping block and a second clamping block. A fixed block is installed inside the housing. A groove is formed in the middle of the fixed block. A bidirectional lead screw is arranged in the groove. The two ends of the bidirectional lead screw are rotationally connected to bearings installed on the housing. The first clamping block and the second clamping block are symmetrically arranged on the bidirectional lead screw. Screw nuts threadedly connected to the bidirectional lead screw are embedded in both the first clamping block and the second clamping block. An adjusting wheel is installed in the middle of the bidirectional lead screw. A crank is installed at the bottom of the fixed block.

[0007] As a further scheme of the utility model: Guide rails are arranged on the inner walls of both sides of the groove, and the guide rails are in sliding fit with the first clamping block and the second clamping block.

[0008] As a still further scheme of the utility model: V-shaped clamping grooves are formed on the opposite end faces of the first clamping block and the second clamping block.

[0009] As a further solution of the utility model: the crank comprises a first rocker, a second rocker, a plug and a third rocker, the first rocker is vertically connected to the second rocker and the third rocker, and the plug is installed at the end of the second rocker.

[0010] As a further solution of the utility model: a socket is provided at the bottom of the fixing block, and the socket is movably plugged with the plug.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The bidirectional screw and the adjusting wheel of the utility model can drive the bidirectional screw to rotate by turning the adjusting wheel, and the rotation of the bidirectional screw can drive the first clamping block and the second clamping block to adjust the spacing to adapt to different specifications of fire hydrant valve stem nuts, so that the utility model has a wider range of application and stronger practicality.

[0013] 2. The utility model cooperates with the outer shell, the fixing block, the first clamping block, the second clamping block and the rocker arm, and can manually screw the nut of the fire hydrant valve stem to control the water flow and on-off of the fire hydrant. In addition, a V-shaped clamping groove is provided on the clamping block, so that the clamping block and the fire hydrant valve stem nut are more compatible, avoiding slipping during rotation and difficulty in effectively exerting force. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A top view of an adjustable fire hydrant key.

[0015] Figure 2 The present invention is a schematic diagram of the three-dimensional structure of an adjustable fire hydrant key.

[0016] Figure 3 The present invention is a partial cutaway view of the structure of an adjustable fire hydrant key.

[0017] 1. Housing; 2. Fixing block; 3. Bidirectional screw; 4. First clamping block; 5. Second clamping block; 6. Guide rail; 7. Bearing; 8. Screw nut; 9. Adjusting wheel; 10. V-shaped clamping groove; 11. Socket; 12. Crank; 1201. First rocker; 1202. Second rocker; 1203. Plug; 1204. Third rocker; 13. Slot body. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Please refer to Figure 1 and Figure 3 In the embodiment of the present utility model, an adjustable fire hydrant key includes a housing 1, a first clamping block 4 and a second clamping block 5. A fixed block 2 is installed inside the housing 1. A groove 13 is formed in the middle of the fixed block 2. A bidirectional lead screw 3 is arranged in the groove 13. Both ends of the bidirectional lead screw 3 are rotatably connected to bearings 7 installed on the housing 1. The first clamping block 4 and the second clamping block 5 are symmetrically arranged on the bidirectional lead screw 3. V-shaped clamping grooves 10 are formed on the opposite end faces of the first clamping block 4 and the second clamping block 5. The design of the V-shaped clamping grooves 10 can better adapt to the shape of the fire hydrant valve stem nut, avoiding slipping during the process of turning the fire hydrant key. Screw nuts 8 threadedly connected to the bidirectional lead screw 3 are embedded in both the first clamping block 4 and the second clamping block 5. An adjusting wheel 9 is installed in the middle of the bidirectional lead screw 3. The surface of the adjusting wheel 9 is provided with an anti-slip structure. Such a design can increase the surface friction of the adjusting wheel 9, facilitating the exertion of force by personnel. A crank 12 is installed at the bottom of the fixed block 2;

[0020] Guide rails 6 are arranged on both inner walls of the groove 13. The guide rails 6 are slidably matched with the first clamping block 4 and the second clamping block 5. The arrangement of the guide rails 6 can guide the first clamping block 4 and the second clamping block 5, avoiding left and right rotation during the movement of the first clamping block 4 and the second clamping block 5, resulting in instability.

[0021] Please refer to Figures 2-3 The crank 12 includes a first rocker 1201, a second rocker 1202, a plug 1203 and a third rocker 1204. The first rocker 1201 is perpendicularly connected to both the second rocker 1202 and the third rocker 1204. The plug 1203 is installed at the end of the second rocker 1202. A socket 11 is formed at the bottom of the fixed block 2. The socket 11 is movably inserted and matched with the plug 1203. The movable insertion can make the crank 12 detachable, facilitating the disassembly and storage of the fire hydrant key when not in use, and also facilitating local replacement in case of damage, reducing the maintenance cost.

[0022] The working principle of the present utility model is as follows:

[0023] During use, personnel first adjust the distance between the first clamping block 4 and the second clamping block 5 according to the specification of the fire hydrant valve stem nut. When adjusting, the adjusting wheel 9 is toggled. The adjusting wheel 9 drives the bidirectional lead screw 3 to rotate. The bidirectional lead screw 3 drives the first clamping block 4 and the second clamping block 5 to move along the guide rails 6, achieving mutual approach or mutual separation. Then, the fire hydrant valve stem nut can be clamped through the V-shaped clamping grooves 10 formed on the first clamping block 4 and the second clamping block 5. Then, the end of the crank 12 with the plug 1203 is inserted into the socket 11 formed on the fixed block 2. Then, by rotating the crank 12, the fire hydrant valve stem nut can be rotated, thereby opening or closing the fire hydrant.

[0024] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An adjustable fire hydrant key, comprising a housing (1), a first clamping block (4) and a second clamping block (5), characterized in that: A fixing block (2) is installed inside the housing (1), a groove body (13) is provided in the middle of the fixing block (2), a bidirectional screw rod (3) is arranged in the groove body (13), two ends of the bidirectional screw rod (3) are rotatably connected to bearings (7) installed on the housing (1), a first clamping block (4) and a second clamping block (5) are symmetrically arranged on the bidirectional screw rod (3), a screw nut (8) threadedly connected to the bidirectional screw rod (3) is embedded on the first clamping block (4) and the second clamping block (5), an adjusting wheel (9) is installed in the middle of the bidirectional screw rod (3), and a crank handle (12) is installed at the bottom of the fixing block (2).

2. The adjustable fire hydrant key according to claim 1, characterized in that: Guide rails (6) are provided on the inner walls on both sides of the groove body (13), and the guide rails (6) are slidably matched with the first clamping block (4) and the second clamping block (5).

3. The adjustable fire hydrant key according to claim 1, characterized in that: V-shaped clamping grooves (10) are provided on the opposite end surfaces of the first clamping block (4) and the second clamping block (5).

4. The adjustable fire hydrant key according to claim 1, characterized in that: The crank (12) comprises a first rocker (1201), a second rocker (1202), a plug (1203) and a third rocker (1204); the first rocker (1201) is vertically connected to the second rocker (1202) and the third rocker (1204); and the plug (1203) is installed at the end of the second rocker (1202).

5. The adjustable fire hydrant key according to claim 1, characterized in that: The bottom of the fixing block (2) is provided with a socket (11), and the socket (11) is movably plugged into and matched with the plug (1203).

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