Electric wrench for opening and closing fire hydrant
By designing an electric wrench for switching fire hydrants, using gear reduction motor and grabbing technology, the problem of the fire hydrant being consumed by a lot of time and physical strength when opening and closing fire hydrants is solved, time and physical strength savings are achieved during the fire rescue process, and fire protection is improved Work efficiency.
Patent Information
- Application Number
- CN202420404173.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-04
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-04
AI Technical Summary
In the prior art, opening and closing of fire hydrants requires firefighters to spend a lot of time and physical strength, especially in the event of insufficient maintenance, resulting in inefficient fire rescue.
An electric wrench for switching fire hydrants was designed, and a speed reduction motor was used instead of manpower to open and close the fire hydrant. The electric wrench and the fire hydrant were quickly fixed by grabbing, which could remotely realize the start and stop of the fire hydrant.
By replacing manpower with the speed reduction motor, the opening and closing time of the fire hydrant is shortened, the physical strength of firefighters is saved, the fire fighting work efficiency is improved, and the rapid fixation of electric wrench and fire hydrant is achieved through grabbing, avoiding the need for external force gripping .
Smart Images
Figure CN222450095U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of fire-fighting equipment, in particular to an electric wrench used for switching fire hydrants. Background Art
[0002] Fire hydrants are water supply facilities installed on the fire water supply network. They are widely installed on urban roads and around buildings. They are the main source of water for firefighters to extinguish fires. Fire hydrants are products manufactured in accordance with national standards and industry standards, with unified structure and manufacturing process. They have the same appearance, structure and size. The main structure is mostly cast in cast iron, and the valves are mostly gate valves. Because of their wide distribution, fire hydrant valves are often prone to rust and difficult to open and close due to inadequate maintenance.
[0003] At present, the main way to open or close a fire hydrant is to use a fire hydrant wrench or a multifunctional manual wrench, which relies on manual twisting of the fire hydrant. The disadvantages of this method are: 1. It often takes many turns to turn an outdoor fire hydrant to the open position, which undoubtedly wastes a lot of rescue time; 2. When the fire hydrant is not properly maintained and rusted, it often requires firefighters to spend a lot of effort to open it.
[0004] When encountering a fire, fire rescue is a race against time, and the physical strength and energy of firefighters are also very precious. Therefore, it is necessary to develop a reliable auxiliary tool for the situation where the fire hydrant is difficult to turn, so that the operation of the fire hydrant is more convenient and labor-saving, so as to save the time and physical strength of firefighters in the process of fire rescue. Utility Model Content
[0005] The purpose of the utility model is to provide an electric wrench for opening and closing fire hydrants, which is necessary to address the problems existing in the prior art, so that the operation of fire hydrants is more convenient and labor-saving, so as to save firefighters' time and physical strength during firefighting and rescue.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] An electric wrench for opening and closing a fire hydrant, comprising a reduction motor, a fixed base, a limit ring, a catch and a screw connection head;
[0008] The screw connector penetrates the middle of the fixed base in the vertical direction and is rotatably connected to the fixed base through a bearing; the reduction motor is fixedly connected to the top of the fixed base; the upper end of the screw connector is fixedly connected to the output shaft of the reduction motor, and the lower end surface of the screw connector is provided with a screw connection groove matching the shape of the valve stem of the fire hydrant;
[0009] The fixed base is cylindrical in shape as a whole, and the limiting ring can be slidably sleeved on the outer side surface of the fixed base in the vertical direction;
[0010] A plurality of limit grooves are evenly distributed on the outer edge of the lower end surface of the fixed base, and a catch is installed in each limit groove; the upper end of each catch is rotatably connected to the corresponding limit groove through a pin parallel to the tangent direction, so that the catch can rotate around the pin to achieve a gripping action;
[0011] The lower end of the catch has a hook claw portion protruding inward, and the hook claw portion matches the notch on the valve stem seat of the fire hydrant head; when the catch is in the engaged state, the outer edge of the catch is parallel to the outer edge of the fixed base, so that the catch can be kept in the engaged state when the limit ring moves downward to the lower end of the fixed base.
[0012] Furthermore, the upper end of the fixed base has a radially protruding limit convex eaves, and the middle part of the outer side surface of the catch has a radially protruding limit protrusion; the limit convex eaves and the limit protrusions are respectively used to limit the maximum upward and downward sliding stroke of the limit ring.
[0013] Furthermore, the pin and the catch are relatively fixed in the rotation direction so as to be connected in synchronous rotation; the two ends of the pin are rotationally connected to the two ends of the limit slot; one end of the pin is connected to the fixed base through a reset torsion spring, so as to elastically reset the catch to an open state.
[0014] Furthermore, there are three catches and three limit grooves.
[0015] Furthermore, the screw connection groove on the lower end surface of the screw connection head is a pentagonal groove.
[0016] The utility model provides an electric wrench for opening and closing fire hydrants. The electric wrench uses a reduction motor to replace manpower to open and close the fire hydrant, shortening the time for opening and closing the fire hydrant, saving the precious physical strength of firefighters, and improving the efficiency of firefighting. At the same time, the electric wrench and the fire hydrant are quickly fixed by a catch, which can completely rely on its own structure to offset the torque in the rotation direction, without external force gripping, and can remotely start and stop the fire hydrant. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural diagram of the gripping state of an electric wrench for switching a fire hydrant provided by an embodiment of the utility model;
[0018] Figure 2 This is a structural diagram of a loosened state of an electric wrench for switching a fire hydrant provided by an embodiment of the utility model;
[0019] Figure 3 It is an exploded view of an electric wrench for opening and closing a fire hydrant provided by an embodiment of the utility model;
[0020] Figure 4 The utility model provides an electric wrench for switching fire hydrants. DETAILED DESCRIPTION
[0021] The technical solution of the utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] like Figures 1 to 3 As shown, the electric wrench for opening and closing a fire hydrant provided in this embodiment includes a reduction motor 1, a fixed base 2, a limit ring 3, a catch 4 and a screw connector 5;
[0023] The screw connector 5 passes through the middle of the fixed base 2 in the vertical direction and is rotatably connected to the fixed base 2 through a bearing; the reduction motor 1 is fixedly connected to the top of the fixed base 2; the upper end of the screw connector 5 is fixedly connected to the output shaft of the reduction motor 1, and the lower end surface of the screw connector 5 is provided with a screw connection groove matching the shape of the valve stem of the fire hydrant;
[0024] The fixed base 2 is cylindrical in shape as a whole, and the limiting ring 3 can be slidably sleeved on the outer side surface of the fixed base 2 along the vertical direction;
[0025] A plurality of limit grooves 21 are evenly distributed on the outer edge of the lower end surface of the fixed base 2, and a corresponding catch 4 is installed in each limit groove 21; the upper end of each catch 4 is rotatably connected to the corresponding limit groove 21 through a pin 22 parallel to the tangent direction, so that the catch 4 can rotate around the pin 22 to achieve the grabbing action;
[0026] The lower end of the catch 4 has a hook claw portion protruding inward, and the hook claw portion matches the notch on the valve stem seat of the fire hydrant head; when the catch 4 is in the grasping state, the outer edge of the catch 4 is parallel to the outer edge of the fixed base 2, so that the catch 4 can be kept in the grasping state when the limit ring 3 moves downward to the lower end of the fixed base 2.
[0027] Furthermore, the upper end of the fixed base 2 has a radially protruding limit convex eave 20, and the middle part of the outer side surface of the catch 4 has a radially protruding limit protrusion 40; the limit convex eave 20 and the limit protrusion 40 are respectively used to limit the maximum upward and downward sliding stroke of the limit ring 3.
[0028] Furthermore, the pin 22 and the catch 4 are relatively fixed in the rotation direction so as to be connected in synchronous rotation; the two ends of the pin 22 are rotationally connected to the two ends of the limit groove 21; one end of the pin 22 is connected to the fixed base 2 through a reset torsion spring 23, which is used to elastically reset the catch 4 to an open state.
[0029] In this embodiment, in order to match the most common fire hydrant specifications, there are three catches 4 and three limit grooves 21. The screw connection groove on the lower end surface of the screw connector 5 is a pentagonal groove.
[0030] When this embodiment is used, first move the limit ring 3 upwards, at which time the reset torsion spring 23 at one end of the pin 22 rotates the pin 22 outwards, so that the catch 4 automatically resets outwards to an open state. Next, dock the screw connection groove on the lower end face of the screw connector with the valve stem of the fire hydrant head, and rotate the fixed base 2 appropriately so that the position of the catch 4 on the fixed base 2 is opposite to the position of the notch on the valve stem seat. Then move the limit ring 3 downwards, and through the limiting effect of the limit ring 3, the catch 4 is gripped inwards and finally locked in the gripping state. At this point, the electric wrench has been fixed on the fire hydrant, and the fire hydrant is opened and closed by controlling the forward and reverse rotation of the reduction motor 1.
[0031] The utility model provides an electric wrench for opening and closing fire hydrants. The electric wrench uses a reduction motor to replace manpower to open and close the fire hydrant, shortening the time for opening and closing the fire hydrant, saving the precious physical strength of firefighters, and improving the efficiency of firefighting. At the same time, the electric wrench and the fire hydrant are quickly fixed by a catch, which can completely rely on its own structure to offset the torque in the rotation direction, without external force gripping, and can remotely start and stop the fire hydrant.
[0032] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. An electric wrench for opening and closing a fire hydrant, characterized in that: It includes a reduction motor, a fixing base, a limiting ring, a catch and a screw connector; The screw connector penetrates the middle of the fixed base in the vertical direction and is rotatably connected to the fixed base through a bearing; the reduction motor is fixedly connected to the top of the fixed base; the upper end of the screw connector is fixedly connected to the output shaft of the reduction motor, and the lower end surface of the screw connector is provided with a screw connection groove matching the shape of the valve stem of the fire hydrant; The fixed base is cylindrical in shape as a whole, and the limiting ring can be slidably sleeved on the outer side surface of the fixed base along the vertical direction; A plurality of limit grooves are evenly distributed on the outer edge of the lower end surface of the fixed base, and a catch is installed in each limit groove; the upper end of each catch is rotatably connected to the corresponding limit groove through a pin parallel to the tangent direction, so that the catch can rotate around the pin to achieve a gripping action; The lower end of the catch has a hook claw portion protruding inward, and the hook claw portion matches the notch on the valve stem seat of the fire hydrant head; when the catch is in the engaged state, the outer edge of the catch is parallel to the outer edge of the fixed base, so that the catch can be kept in the engaged state when the limit ring moves downward to the lower end of the fixed base.
2. The electric wrench for opening and closing a fire hydrant according to claim 1, characterized in that: The upper end of the fixed base has a radially protruding limit convex eaves, and the middle part of the outer side surface of the catch has a radially protruding limit protrusion; the limit convex eaves and the limit protrusions are respectively used to limit the maximum stroke of the limit ring sliding up and down.
3. The electric wrench for opening and closing a fire hydrant according to claim 1, characterized in that: The pin and the catch are relatively fixed in the rotation direction so as to be connected in synchronous rotation; the two ends of the pin are rotationally connected to the two ends of the limit groove; one end of the pin is connected to the fixed base through a reset torsion spring so as to elastically reset the catch to an open state.
4. The electric wrench for opening and closing a fire hydrant according to claim 1, characterized in that: There are three catches and three limit grooves.
5. The electric wrench for opening and closing a fire hydrant according to claim 1, characterized in that: The screw connection groove on the lower end surface of the screw connection head is a pentagonal groove.