Fire hydrant wrench

Abstract

The utility model discloses a fire hydrant wrench which comprises a clamp mouth main body and an opening, the opening is arranged at the front end of the clamp mouth main body, a rotating shaft is fixed on the side wall of the clamp mouth main body, a protective shell is rotatably connected on the rotating shaft, the clamp mouth main body is arranged in the protective shell, and a rotation driving mechanism is arranged between the protective shell and the clamp mouth main body. A first handle is fixed to the outer wall of the protective shell, an extension mechanism is arranged on the first handle, the rotation driving mechanism comprises a storage groove, a clamping block and ratchets, a limiting plate is fixed to the inner wall of the protective shell and arranged on one side of the clamping block, and a reset spring is arranged between the clamping block and the side wall of the storage groove. The expansion mechanism comprises a clamping groove, a fixing sliding block and a second handle, a guiding fixing block is fixed to the side wall of the fixing sliding block, an inserting block is connected to the clamping groove in an inserting and pulling mode, and the inserting block is in sliding connection with the inner wall of the guiding fixing block. The utility model belongs to the technical field of wrenches, and particularly relates to a fire hydrant wrench.

Description

Technical Field

[0001] The utility model belongs to the technical field of wrenches, in particular to a fire hydrant wrench. Background Art

[0002] A wrench is a commonly used installation and disassembly tool. It is a hand tool that uses the principle of leverage to twist bolts, screws, nuts and other threaded fastening bolts or nuts through openings or sockets. Existing fire hydrant wrenches, such as a fire hydrant wrench disclosed in application number CN201620672866.1, have an opening that can be used to twist exposed bolts or nuts, a first column that can be inserted into the bolt cover of the fire hydrant to twist the valve stem, and a magnet that can provide magnetic force to couple the valve stem with the rotating body; a second convex column that can be inserted into the bolt cover to twist the pentagonal valve stem; and a fire hydrant can be installed or used with a single wrench.

[0003] However, in actual use, in order to ensure a stable connection, bolts and nuts usually require a large number of turns. When taking and placing existing wrenches, they often need to be plugged in and out and rotated repeatedly to complete disassembly and assembly, which is inefficient. When dealing with emergency situations such as fires, it is difficult to quickly operate, thus delaying firefighting. In order to ensure that fire hydrants do not leak on a daily basis, the bolts and other structures on them are relatively tight. In an emergency, different users have different strengths. The existing wrench has a fixed structure and is limited in length. It is difficult for users with less strength to pry bolts, etc. On the other hand, fire hydrants are usually set in walls with limited internal space. The existing wrench needs to be deep inside the fire hydrant to operate, which is inconvenient to use. To this end, we propose a fire hydrant wrench to solve the above problems. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a fire hydrant wrench, which effectively solves the problem that the existing fire hydrant wrenches need to be repeatedly plugged, pulled out and rotated during disassembly and assembly, resulting in low efficiency. It also solves the problem that people with less strength cannot pry and complete disassembly when using the existing wrenches, and solves the problem of inconvenience in operating deep into the fire hydrant.

[0005] The technical solution adopted by the utility model is as follows: A fire hydrant wrench proposed in the utility model includes a pliers mouth main body and an opening, the opening is arranged at the front end of the pliers mouth main body, a rotating shaft is fixed on the side wall of the pliers mouth main body, a protective shell is rotatably connected to the rotating shaft, and the pliers mouth main body is arranged in the protective shell, a rotating drive mechanism is provided between the protective shell and the pliers mouth main body, a handle one is fixed on the outer wall of the protective shell, and an expansion mechanism is provided on the handle one.

[0006] As an improvement of the present solution, the rotation drive mechanism includes a receiving groove, a clamp block and a ratchet; the receiving groove is arranged in the protective shell; the clamp block is rotatably connected to the inner wall of the protective shell and is arranged in the receiving groove; the ratchet teeth are evenly distributed on the side wall of the pliers mouth body and are arranged between the pliers mouth body and the protective shell; a limit plate is fixed on the inner wall of the protective shell, and the limit plate is arranged on one side of the clamp block; a reset spring is arranged between the clamp block and the side wall of the receiving groove.

[0007] As an improvement of the present scheme, the expansion mechanism includes a card slot, a fixed slider and a second handle, the card slots are evenly distributed on one side wall of the handle, the fixed slider is pluggably connected to the first handle, the second handle is fixed to the side wall of the fixed slider and is parallel to the first handle, a guide fixing block is fixed on the side wall of the fixed slider, an insertion block is pluggably connected to the card slot, and a sliding connection is formed between the insertion block and the inner wall of the guide fixing block.

[0008] As an improvement of the present scheme, a rotating ring is fixed on the upper end of the guide fixed block, a limiting ring is fixed on the end of the insert block close to the outer side, a driving screw is rotatably connected to the limiting ring, and the other end of the driving screw passes through the guide fixed block, and a toggle ring is rotatably connected to the rotating ring, and the driving screw passes through the toggle ring and is threadedly connected to the toggle ring.

[0009] As an improvement of this solution, a guide groove is provided on the side wall of the protective shell, a sliding shaft is fixed on the side wall of the pliers mouth body, and the sliding shaft is slidably connected to the guide groove, a hexagonal nut is rotatably connected to the side wall of the protective shell, and the hexagonal nut is fixedly connected to both ends of the rotating shaft.

[0010] As an improvement of the present solution, the limit plate is arranged between the clamping block and the ratchet, the inserting block is arranged between the clamping slot and the guide fixing block, and the rotating shaft and the guide slot are arranged in a through-axis manner.

[0011] As an improvement of the present solution, the protective shell is arranged in a fan-shaped plate shape with a U-shaped cross-section, the fixed sliding block is arranged in a U-shaped shape, the guide fixed block is arranged in a U-shaped shape, and the insert block is arranged in a T-shape.

[0012] As an improvement of the present solution, the ratchet and the clamping block are both arranged in a right triangle, and the straight edge of the ratchet is arranged to fit the straight edge of the clamping block.

[0013] The beneficial effects achieved by the utility model using the above structure are as follows:

[0014] 1. It is equipped with a rotating drive mechanism, and adopts a structural design that the jaws and openings can rotate relative to the protective shell. Through the ratchet and the rotatable block, the bolts can be driven continuously, which reduces the number of single operation openings and jaw insertion and extraction, and improves the efficiency of disassembly and assembly of various connecting parts on the fire hydrant.

[0015] 2. By adopting an expansion mechanism, through a pluggable fixed slider and handle 2 on it, the length of handle 1 and the distance of outward expansion can be extended, so that disassembly and assembly can be made more labor-saving, and through the selection of multiple groups of extensions and slot positions, the hand-held position can be placed on the outside of the fire hydrant, which is convenient for user operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a fire hydrant wrench proposed by the utility model;

[0017] Figure 2 A cross-sectional view of a fire hydrant wrench proposed by the utility model;

[0018] Figure 3 for Figure 2 A partial enlarged schematic diagram of part A;

[0019] Figure 4 for Figure 2 A partial enlarged schematic diagram of part B;

[0020] Figure 5 The utility model is a schematic diagram of the internal structure of a fire hydrant wrench.

[0021] Among them, 1. pliers mouth body; 2. opening; 3. rotating shaft; 4. protective shell; 5. rotating drive mechanism; 6. handle one; 7. expansion mechanism; 8. storage slot; 9. clamp block; 10. ratchet; 11. limit plate; 12. reset spring; 13. clamp slot; 14. fixed slider; 15. handle two; 16. insert block; 17. guide fixed block; 18. rotating ring; 19. limit ring; 20. driving screw; 21. toggle ring; 22. guide slot; 23. sliding shaft; 24. hexagon socket nut.

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a fire hydrant wrench proposed by the utility model includes a pliers mouth body 1 and an opening 2, the opening 2 is arranged at the front end of the pliers mouth body 1, a rotating shaft 3 is fixed on the side wall of the pliers mouth body 1, a protective shell 4 is rotatably connected to the rotating shaft 3, and the pliers mouth body 1 is arranged in the protective shell 4, a rotating driving mechanism 5 is provided between the protective shell 4 and the pliers mouth body 1, a handle 6 is fixed on the outer wall of the protective shell 4, and an expansion mechanism 7 is provided on the handle 6.

[0025] In order to achieve continuous driving of bolts, nuts, etc. and reduce the number of repeated plugging and unplugging, the rotation drive mechanism 5 includes a storage groove 8, a clamp block 9 and a ratchet 10. The storage groove 8 is arranged in the protective shell 4, and the clamp block 9 is rotatably connected to the inner wall of the protective shell 4 and is arranged in the storage groove 8. The ratchet 10 is evenly distributed on the side wall of the pliers mouth body 1 and is arranged between the pliers mouth body 1 and the protective shell 4. A limit plate 11 is fixed on the inner wall of the protective shell 4, and the limit plate 11 is arranged on one side of the clamp block 9. A reset spring 12 is provided between the clamp block 9 and the side wall of the storage groove 8.

[0026] In order to achieve the function of labor-saving during operation and the function of being able to be operated from the outside of the fire hydrant, the expansion mechanism 7 includes a card slot 13, a fixed slider 14 and a handle 15. The card slots 13 are evenly distributed on the side walls of the handle 1 6. The fixed slider 14 is plug-in connected to the handle 1 6. The handle 15 is fixed to the side wall of the fixed slider 14 and is parallel to the handle 1 6. A guide fixing block 17 is fixed to the side wall of the fixed slider 14. An insertion block 16 is plug-in connected to the card slot 13, and the insertion block 16 is slidably connected to the inner wall of the guide fixing block 17; a rotating ring 18 is fixed to the upper end of the guide fixing block 17, and a limiting ring 19 is fixed to the end of the insertion block 16 close to the outer side, and a driving screw 20 is rotatably connected to the limiting ring 19, and the other end of the driving screw 20 is arranged through the guide fixing block 17, and a toggle ring 21 is rotatably connected to the rotating ring 18, and the driving screw 20 is arranged through the toggle ring 21 and is threadedly connected to the toggle ring 21.

[0027] A guide groove 22 is provided on the side wall of the protective shell 4, a sliding shaft 23 is fixed on the side wall of the pliers mouth body 1, and the sliding shaft 23 is slidably connected to the guide groove 22, a hexagonal nut 24 is rotatably connected to the side wall of the protective shell 4, and the hexagonal nut 24 is fixedly connected to both ends of the rotating shaft 3; the limit plate 11 is arranged between the clamp block 9 and the ratchet 10, the insert block 16 is arranged between the clamp slot 13 and the guide fixing block 17, and the rotating shaft 3 and the guide groove 22 are arranged in a through-axis manner.

[0028] The protective shell 4 is arranged in a fan-shaped plate with a U-shaped cross-section, the fixed slider 14 is arranged in a U-shaped shape, the guide fixed block 17 is arranged in a U-shaped shape, and the insert block 16 is arranged in a T-shape; the ratchet 10 and the block 9 are both arranged in a right-angled triangle, and the straight edge of the ratchet 10 is arranged to fit the straight edge of the block 9.

[0029] When in use, the pliers mouth body 1 is clamped on the bolt or nut by the opening 2, and the handle 6 is held and rotated. Under the limit of the limit plate 11, the clamp block 9 remains stationary and uses its straight edge to push the ratchet 10 to drive the opening 2 to rotate with the rotating shaft 3 as the center. After the bolt and the nut are rotated through a certain angle, the handle 6 is rotated in the opposite direction. When the inclined surface of the clamp block 9 contacts the inclined surface of the ratchet 10, the clamp block 9 is pressed to the side of the reset spring 12, so that the pliers mouth body 1 is not pulled off and is guided by the guide groove 22 and the sliding shaft 23 to cause relative rotation with the protective shell 4, and then the handle 6 is turned again to complete. For the disassembly and assembly of bolts and nuts, etc., when the user has less strength or it is inconvenient to operate in the fire hydrant box, the handle 2 15 is inserted into the handle 1 6 using the fixed slider 14, and the toggle ring 21 is rotated to drive the driving screw 20 to push the plug block 16 into the slot 13 along the axial direction of the toggle ring 21 to complete the fixation. At this time, the user can grasp the handle 2 15 to extend the length of the lever, making the operation more labor-saving. By changing the fixed position of the plug block 16 and the slot 13 and the number of the handle 2 15, the handle 2 15 can be held from outside the fire hydrant box. The above is the entire use process of the fire hydrant wrench.

[0030] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A fire hydrant wrench, comprising a jaw body (1) and an opening (2), wherein the opening (2) is arranged at the front end of the jaw body (1), characterized in that: A rotating shaft (3) is fixed on the side wall of the pliers mouth body (1), a protective shell (4) is rotatably connected to the rotating shaft (3), and the pliers mouth body (1) is arranged in the protective shell (4), a rotating driving mechanism (5) is provided between the protective shell (4) and the pliers mouth body (1), and a handle (6) is fixed on the outer wall of the protective shell (4), and an expansion mechanism (7) is provided on the handle (6).

2. A fire hydrant wrench according to claim 1, characterized in that: The rotation drive mechanism (5) comprises a storage groove (8), a clamping block (9) and a ratchet (10); the storage groove (8) is arranged in the protective shell (4); the clamping block (9) is rotatably connected to the inner wall of the protective shell (4) and is arranged in the storage groove (8); the ratchet (10) is evenly distributed on the side wall of the pliers mouth body (1) and is arranged between the pliers mouth body (1) and the protective shell (4); a limit plate (11) is fixed on the inner wall of the protective shell (4), and the limit plate (11) is arranged on one side of the clamping block (9); and a reset spring (12) is arranged between the clamping block (9) and the side wall of the storage groove (8).

3. A fire hydrant wrench according to claim 2, characterized in that: The expansion mechanism (7) comprises a card slot (13), a fixed slider (14) and a second handle (15); the card slot (13) is evenly distributed on the side wall of the first handle (6); the fixed slider (14) is pluggably connected to the first handle (6); the second handle (15) is fixed to the side wall of the fixed slider (14) and is parallel to the first handle (6); a guide fixing block (17) is fixed to the side wall of the fixed slider (14); an insert block (16) is pluggably connected to the card slot (13); and the insert block (16) is slidably connected to the inner wall of the guide fixing block (17).

4. A fire hydrant wrench according to claim 3, characterized in that: A rotating ring (18) is fixed on the upper end of the guide fixed block (17); a limiting ring (19) is fixed on the end of the insert block (16) close to the outer side; a driving screw (20) is rotatably connected to the limiting ring (19); and the other end of the driving screw (20) penetrates the guide fixed block (17); a toggle ring (21) is rotatably connected to the rotating ring (18); and the driving screw (20) penetrates the toggle ring (21) and is threadedly connected to the toggle ring (21).

5. A fire hydrant wrench according to claim 4, characterized in that: A guide groove (22) is provided on the side wall of the protective shell (4), a sliding shaft (23) is fixed on the side wall of the pliers mouth body (1), and the sliding shaft (23) is slidably connected to the guide groove (22), and a hexagon socket nut (24) is rotatably connected to the side wall of the protective shell (4), and the hexagon socket nut (24) is fixedly connected to both ends of the rotating shaft (3).

6. A fire hydrant wrench according to claim 5, characterized in that: The limit plate (11) is arranged between the clamping block (9) and the ratchet (10), the inserting block (16) is arranged between the clamping groove (13) and the guide fixing block (17), and the rotating shaft (3) and the guide groove (22) are arranged in a through-axis manner.

7. A fire hydrant wrench according to claim 6, characterized in that: The protective shell (4) is arranged in a fan-shaped plate shape with a U-shaped cross section, the fixed sliding block (14) is arranged in a square shape, the guide fixed block (17) is arranged in a square shape, and the insert block (16) is arranged in a T shape.

8. A fire hydrant wrench according to claim 7, characterized in that: The ratchet (10) and the clamping block (9) are both arranged in the form of a right triangle, and the straight edge of the ratchet (10) is arranged to fit the straight edge of the clamping block (9).

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