Fire hydrant valve opening degree detection device

Abstract

The utility model discloses a fire hydrant valve opening degree detection device, and belongs to the technical field of valve opening degree detection. A fire hydrant valve opening degree detection device comprises a protection box, the protection box is provided with an up-down through installation hole, a shaft sleeve is rotatably arranged in the installation hole, the outer diameter of the shaft sleeve is smaller than the diameter of the installation hole, and a plurality of magnetic steels are fixedly installed on the outer side of the shaft sleeve. A circuit board is fixedly installed in the protection box, a Hall sensor is installed on the circuit board, and the Hall sensor is coupled with the magnetic steel. The shaft sleeve is sleeved and fixedly installed on the outer side of the valve rod of the fire hydrant, then the protection box is moved, the shaft sleeve is arranged in the installation hole, and the protection box is fixed to the fire hydrant. When the fire hydrant valve rod is rotated, after the Hall sensor detects the change of a magnetic field, corresponding Hall voltage can be generated at the output end of the Hall sensor according to the Hall effect principle, and the opening and closing state and the opening and closing angle of the fire hydrant valve rod can be detected by detecting the Hall voltage.

Description

Technical Field

[0001] This application relates to the field of valve opening and closing degree detection technology, and more specifically, to a fire hydrant valve opening and closing degree detection device. Background Technology

[0002] Fire hydrants are an indispensable component of urban fire protection systems. In the event of a fire, fire hydrants provide firefighters with a rapid and reliable water source, making them crucial for extinguishing fires. They are typically installed in locations such as streets and around buildings for easy access by firefighters. The proper functioning of fire hydrants is vital for protecting people's lives and property; malfunctions or improper design can delay fire rescue efforts and lead to serious consequences.

[0003] A search revealed that Chinese patent CN109107072A discloses a fire hydrant with a water pressure detection device. This device measures a series of internal structures of the sealed cover, allowing water pressure to be detected by a pressure detector. A signal processor attenuates and amplifies the electrical signal from the pressure detector before transmitting it to a microprocessor for further processing. The microprocessor converts the signal into a digital signal, which is then wirelessly transmitted to a control terminal via a wireless communication device. This allows for real-time monitoring by staff, and the pressure display shows the water pressure readings. The rotation of the pointer clearly indicates the specific water pressure value, enabling on-site personnel to quickly obtain the data and facilitating use by firefighters.

[0004] The aforementioned fire hydrants lack the function of detecting the opening degree of their valves, making it impossible to detect abnormal opening of the fire hydrants in a timely manner; therefore, we propose a fire hydrant valve opening degree detection device. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this application is to provide a fire hydrant valve opening / closing degree detection device to solve the problems mentioned in the background art.

[0007] 2. Technical Solution

[0008] This application is achieved through the following technical solution:

[0009] A fire hydrant valve opening / closing degree detection device includes a protective box with a through mounting hole. A bushing is rotatably mounted inside the mounting hole, the outer diameter of which is smaller than the diameter of the mounting hole. Multiple magnets are fixedly mounted on the outside of the bushing. A circuit board is fixedly mounted inside the protective box, and a Hall sensor is mounted on the circuit board. The Hall sensor is coupled to the magnets.

[0010] As an optional solution to the technical solution of this application, the protective box includes a base plate and a cover, the base plate and the cover are detachably connected, a sealing sleeve is provided between the base plate and the cover, the sealing sleeve is made of non-magnetic material, and the mounting hole is located inside the sealing sleeve.

[0011] As an optional solution to the technical solution of this application, a mounting plate is provided between the base plate and the cover, the mounting plate is clearance-fitted with both the base plate and the cover, the mounting plate is connected to the base plate through an elastic element, and the circuit board is fixedly mounted on the mounting plate.

[0012] As an optional solution to the technical solution of this application, the elastic element is a bending plate, one end of which is fixedly connected to the mounting plate and the other end is fixedly connected to the base plate.

[0013] As an optional solution to the technical solution of this application, a plurality of the magnets are arranged in a ring with equal spacing, and the magnetic poles of two adjacent magnets are the same.

[0014] As an optional solution to the technical solution in this application, a buzzer is installed on the circuit board.

[0015] As an optional solution to the technical solution in this application, a solar panel is installed on the outside of the protective box.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] 1) This application can fix the bushing on the outside of the fire hydrant valve stem. When the fire hydrant valve stem is rotated abnormally, the electric field strength and direction formed by the magnet at the Hall sensor will change. The Hall sensor can detect the opening and closing angle of the fire hydrant valve stem based on the change of the magnetic field.

[0019] 2) This application employs a simple structure, making the installation process relatively easy. It eliminates the need for large-scale modifications to the fire hydrant system or complex wiring, reducing installation costs and impact on existing fire protection facilities. Furthermore, the simple structure facilitates inspection and troubleshooting during later maintenance, reducing maintenance workload and costs, and improving the overall reliability of the fire hydrant system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a fire hydrant valve opening / closing degree detection device;

[0021] In the diagram: 1. Protective box; 101. Mounting hole; 102. Base plate; 103. Cover; 104. Mounting plate; 105. Bending plate; 106. Sealing sleeve; 2. Bushing; 3. Magnet; 4. Circuit board. Detailed Implementation

[0022] The technical solution of this application will now be clearly and completely described in conjunction with the accompanying drawings.

[0023] Please see Figure 1 This application provides a fire hydrant valve opening / closing degree detection device, including a protective box 1. The protective box 1 has a vertically penetrating mounting hole 101. A bushing 2 is rotatably mounted inside the mounting hole 101. The outer diameter of the bushing 2 is smaller than the diameter of the mounting hole 101. Multiple magnets 3 are fixedly mounted on the outside of the bushing 2. A circuit board 4 is fixedly mounted inside the protective box 1. A Hall sensor is mounted on the circuit board 4. The Hall sensor is coupled to the magnets 3.

[0024] By fitting and fixing the bushing 2 onto the outside of the fire hydrant valve stem, and then moving the protective box 1 to place the bushing 2 into the mounting hole 101, the protective box 1 is fixed to the fire hydrant. When the fire hydrant valve stem is rotated, the bushing 2 will rotate along with the fire hydrant valve stem, changing the relative position of the magnet 3 and the Hall sensor. This causes the direction and intensity of the magnetic field formed by the magnet 3 at the Hall sensor to change accordingly. After detecting the change in the magnetic field, the Hall sensor will generate a corresponding Hall voltage at its output terminal according to the Hall effect principle. By detecting the Hall voltage, the opening and closing state and opening angle of the fire hydrant valve stem can be detected.

[0025] Preferably, multiple magnets 3 are arranged in a ring with equal spacing, and the magnetic poles of two adjacent magnets 3 are the same. This arrangement can reduce the nonlinear error of the magnetic field and improve the accuracy of angle measurement.

[0026] Preferably, the protective box 1 includes a base plate 102 and a cover 103, which are detachably connected. A sealing sleeve 106 is provided between the base plate 102 and the cover 103. The sealing sleeve 106 is made of a non-magnetic material, and the mounting hole 101 is located inside the sealing sleeve 106. The sealing sleeve 106 can increase the sealing performance between the base plate 102 and the cover 103, preventing water from entering the protective box 1 through the mounting hole 101 and affecting the safe use of the circuit board 4.

[0027] Preferably, a mounting plate 104 is provided between the base plate 102 and the cover 103. The mounting plate 104 is clearance-fitted with both the base plate 102 and the cover 103. The mounting plate 104 is connected to the base plate 102 via an elastic element, and the circuit board 4 is fixedly mounted on the mounting plate 104. The elastic element is a bending plate 105, with one end fixedly connected to the mounting plate 104 and the other end fixedly connected to the base plate 102. This arrangement can protect the circuit board 4 inside the protective box 1, preventing damage to the electrical components on the circuit board 4.

[0028] Furthermore, a buzzer is installed on circuit board 4. Circuit board 4 can be powered by an external power source or by a battery. When the Hall sensor detects that the fire hydrant valve stem is rotated, the buzzer can be controlled to operate and sound an alarm through the control circuit on circuit board 4.

[0029] When the circuit board 4 is powered by a battery, a solar panel is installed on the outside of the protection box 1. The solar panel converts solar energy into electrical energy and stores the electrical energy in the battery through the charging control circuit.

[0030] In addition, users can add a camera to the outside of the protective box 1 and integrate a communication module on the circuit board 4 to realize functions such as monitoring and remote control.

Claims

1. A hydrant valve opening and closing degree detection device, characterized by: The device includes a protective box (1), which has a through mounting hole (101) on its upper and lower sides. A bushing (2) is rotatably mounted inside the mounting hole (101). The outer diameter of the bushing (2) is smaller than the diameter of the mounting hole (101). Multiple magnets (3) are fixedly mounted on the outside of the bushing (2). A circuit board (4) is fixedly mounted inside the protective box (1). A Hall sensor is mounted on the circuit board (4). The Hall sensor is coupled to the magnets (3).

2. The hydrant valve opening and closing degree detection device according to claim 1, characterized in that: The protective box (1) includes a base plate (102) and a cover (103). The base plate (102) and the cover (103) are detachably connected. A sealing sleeve (106) is provided between the base plate (102) and the cover (103). The sealing sleeve (106) is made of non-magnetic material. The mounting hole (101) is located inside the sealing sleeve (106).

3. The hydrant valve opening and closing degree detection device according to claim 2, characterized in that: An mounting plate (104) is provided between the base plate (102) and the cover (103). The mounting plate (104) is clearance-fitted with the base plate (102) and the cover (103). The mounting plate (104) is connected to the base plate (102) through an elastic element. The circuit board (4) is fixedly mounted on the mounting plate (104).

4. The hydrant valve opening and closing degree detection device according to claim 3, characterized in that: The elastic element is a bending plate (105), one end of which is fixedly connected to the mounting plate (104), and the other end is fixedly connected to the base plate (102).

5. The fire hydrant valve opening / closing degree detection device according to claim 1, characterized in that: Multiple magnets (3) are arranged in a ring with equal spacing, and the magnetic poles of two adjacent magnets (3) are the same.

6. The hydrant valve opening and closing degree detection device according to claim 1, characterized in that: A buzzer is installed on the circuit board (4).

7. The hydrant valve opening and closing degree detection device according to claim 1, characterized in that: The protective box (1) is equipped with a solar panel on its exterior.

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