Cable short circuit measurement alarm device

Abstract

The utility model discloses a cable short circuit measurement alarm device, which comprises a shell, a fixed block is fixed at the top of the shell, and a phase synchronization circuit and a control unit are respectively arranged at the lower part in the shell; a wireless receiving and transmitting module, an action execution unit and an alarm are installed on the upper portion of the shell, and a zero-magnetic-flux Hall current sensor is arranged on the lower portion of the interior of the fixing block; a through groove is formed in the upper portion of the interior of the fixing block. According to the cable short-circuit measurement alarm device, leakage current and insulation resistance of a grounding wire can be collected in real time through the zero-flux Hall current sensor, reliability and stability of cable capacitance leakage current measurement accuracy are ensured, once short circuit of the cable is found, the alarm can rapidly give an alarm to remind a worker to handle the short circuit in time, and the work efficiency is improved. And by rotating the worm, the device can be conveniently detached from the cable and can be conveniently mounted on the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of alarm devices, in particular to a cable short-circuit measurement alarm device. Background Art

[0002] The cable short-circuit measurement and alarm device is a device used to monitor short-circuit faults in cable systems and issue alarm signals. This type of device is widely used in the fields of power, communications, industrial control, etc., and is of great significance in ensuring the safe and stable operation of the system.

[0003] Disadvantages: During the use of the cable, if the insulation layer of the cable is damaged or other reasons cause the cable to short-circuit, it is easy to cause the electrical appliance to stop working, and seriously damage the electrical appliance. At this time, it is necessary to disconnect the cable from the power supply and then troubleshoot the cable until the fault is found and repaired. However, relying solely on manual troubleshooting is inefficient. If the fault cannot be found and repaired in time, the electrical appliance will stop working for a long time, which is likely to cause great losses.

[0004] In order to solve the above-mentioned defects, the prior art (application number: 202220890244.1, Chinese patent application date: 2022-04-18) discloses a cable fault alarm device. Several alarm devices can be installed on the same cable. When the cable is short-circuited, the airbag expands and contacts the pressure sensor, sending a signal to the staff, indicating that there is a short circuit here. At the same time, the staff can judge the approximate location of the cable short circuit based on the alarm device that sends the signal first, so as to more conveniently formulate an inspection and maintenance plan; when the airbag expands and contacts the pressure sensor, the pressure sensor will also control the buzzer to sound, reminding the surrounding personnel that there is a cable short circuit here. At the same time, the cable short circuit causes the surface temperature of the mounting frame to rise, thereby causing the hot melt rod to melt, and then the weight-added rod falls to pull out the warning flag. The warning words and patterns on the surface of the warning flag are exposed, reminding the surrounding personnel that there is a cable short circuit here, paying attention to the danger, and preventing the surrounding personnel from approaching and accidentally touching the short-circuited cable;

[0005] The existing technology achieves the alarm effect by expanding the airbag to contact the pressure sensor and controlling the buzzer to sound. However, it takes a certain amount of time for the airbag to expand due to heat, which makes it impossible for the cable to alarm at the first time of short circuit, causing the staff to miss the best processing time, increasing the loss cost, and then making the warning effect poor. At the same time, most devices are fixed to the cable through U-shaped clamps and multiple bolts, but each disassembly and assembly requires turning multiple bolts, which makes the disassembly and assembly steps time-consuming and labor-intensive, and inconvenient to use.

[0006] Therefore, we proposed a cable short circuit measurement alarm device that can solve the above problems well. Utility Model Content

[0007] The purpose of the present utility model is to provide a cable short-circuit measurement and alarm device to solve the problem proposed in the above-mentioned background technology that it takes a certain amount of time for the airbag to expand due to heat, so that the cable cannot alarm at the first time of short circuit, causing the staff to miss the best processing time, increasing the loss cost, and then making the warning effect poor. At the same time, most of the devices are fixed to the cable through U-shaped clamps and multiple bolts, but each time they are disassembled and assembled, multiple bolts need to be screwed, resulting in the problem that the disassembly and assembly steps are time-consuming and labor-intensive, and inconvenient to use.

[0008] To achieve the above objectives, the present invention provides the following technical solutions: a cable short circuit measurement and alarm device, comprising a housing, a fixing block fixed to the top of the housing, a phase synchronization circuit and a control unit respectively installed below the interior of the housing; a wireless transceiver module, an action execution unit, and an alarm respectively installed above the housing, and a zero-flux Hall current sensor provided below the interior of the fixing block;

[0009] The fixing block further comprises: a through slot is formed on the upper portion of the fixing block, a worm is connected to the lower portion of the through slot in the fixing block, and a worm wheel is rotatably connected to the lower portion of the worm in the fixing block through an axis;

[0010] A threaded rod is provided inside the fixed block and below the worm, and the top of the threaded rod is connected to the shaft end of the worm wheel through a bevel gear set, and a movable block is sleeved on the outer side of the lower end of the threaded rod;

[0011] The inner wall of the through groove is symmetrically provided with clamping plates, and opposite ends of the two clamping plates are fixedly connected with fitting blocks.

[0012] Preferably, the worm is connected to the fixed block by a bearing, and the worm is meshed with the two worm wheels, and the right end of the worm extends to the right side of the fixed block.

[0013] Preferably, the two threaded rods are both rotatably connected to the interior of the fixed block, and the threaded rods and the movable block are threadedly connected, and the side surface of the movable block and the inner wall of the fixed block are slidably connected.

[0014] Preferably, one end of the fitting block away from the clamping plate extends into the interior of the fixed block, and the side surface of one end of the fitting block is slidably arranged in the interior of the fixed block by a slider, and a return spring is installed between the end of the slider and the inner wall of the fixed block. The opposite ends of the fitting block and the movable block are both inclined, and the inclined surfaces of the fitting block and the movable block fit together.

[0015] Preferably, the action execution unit and the phase synchronization circuit are electrically connected to the control unit through wires, and the phase synchronization circuit is electrically connected to the zero-flux Hall current sensor, the wireless transceiver module and the alarm through wires.

[0016] Preferably, warning signs are connected to the lower sides of both sides of the fixed block, and torsion springs are installed at the connection positions between the shaft ends of the two warning signs and the fixed block, and the two warning signs are connected by a pull rope.

[0017] Preferably, the two warning signs are hingedly connected to the fixed block, both ends of the pull rope are fixedly connected to the opposite surfaces of the two warning signs, and the pull rope passes through the fixed block and the interior of the through groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the cable short circuit measurement alarm device can collect the ground wire leakage current and insulation resistance in real time through the zero-flux Hall current sensor, ensuring the reliability and stability of the cable capacitance leakage current measurement accuracy. Once a short circuit is found in the cable, the alarm can quickly sound an alarm to remind the staff to deal with it in time, and by rotating the worm, the device can be easily removed from the cable and installed on the cable. The specific contents are as follows:

[0019] (1) The zero-flux Hall current sensor can collect the ground wire leakage current and insulation resistance in real time to ensure the reliability and stability of the cable capacitance leakage current measurement accuracy. Once a short circuit is found in the cable, the signal is transmitted to the wireless transceiver module. At the same time, the wireless transceiver module transmits the signal to the phase synchronization circuit, so that the phase synchronization circuit is responsible for comparing the voltage information of the power grid with the phase of the leakage signal to obtain the phase difference between the two. The control unit then determines the leakage current of each phase based on the calculated phase difference. If the alarm condition is met, the control unit will control the alarm to sound an alarm to remind the staff to deal with it in time. At the same time, the action execution unit will execute the power supply line of the cable;

[0020] (2) The cable is passed through the through slot, and then the worm is rotated forward, so that the worm drives the two worm wheels to rotate, and then the worm wheels use the bevel gear set to drive the threaded rod to rotate, so that the movable block moves downward and squeezes the fitting block to move it. At this time, the two clamping plates move relative to each other and clamp and fix the passed cable, so that the device can be installed on the cable easily without complicated installation.

[0021] Furthermore, when the device needs to be removed, it is only necessary to rotate the worm in the opposite direction. At this time, the two movable blocks are reset upward and no longer press the fitting block, so that it is reset under the elastic force of the reset spring. Then, the two clamping plates move in the opposite direction and no longer clamp the cable, making it easier to remove the device for maintenance.

[0022] (3) When a short circuit occurs in the cable, the temperature in the slot rises too high and reaches the melting point of the pull rope, causing the pull rope to melt. At this time, the two warning signs rotate downward under the accumulated force of the torsion spring, thereby further reminding the staff that the cable has a short circuit and allowing the staff to find the location of the short circuit as soon as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of two warning signs rotating downwards in the utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the worm and worm wheel of the utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the warning sign of the utility model;

[0027] Figure 5 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0028] Figure 6 For this utility model Figure 1 Enlarged structural diagram at point B in the middle.

[0029] In the figure: 1. Shell; 2. Fixed block; 3. Through slot; 4. Zero-flux Hall current sensor; 5. Wireless transceiver module; 6. Action execution unit; 7. Phase synchronization circuit; 8. Alarm; 9. Control unit; 10. Warning sign; 11. Torsion spring; 12. Pull rope; 13. Clamping plate; 14. Worm; 15. Worm gear; 16. Threaded rod; 17. Movable block; 18. Fitting block; 19. Slider; 20. Return spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1-6 , the utility model provides the following technical solutions: a cable short circuit measurement and alarm device;

[0032] Embodiment 1: In order to solve the problem that the airbag takes a certain amount of time to expand due to heat in the prior art, so that the cable cannot alarm at the first time of short circuit, causing the staff to miss the best processing time, increasing the loss cost, and then making the warning effect poor, and at the same time, most of the devices are fixed to the cable by U-shaped clamps and multiple bolts, but each disassembly and assembly requires screwing multiple bolts, resulting in the disassembly and assembly steps being time-consuming and labor-intensive, and inconvenient to use, the following solution is disclosed, specifically referring to Figure 1 and Figure 2 As shown, it includes a housing 1, a fixing block 2 is fixed on the top of the housing 1, and a phase synchronization circuit 7 and a control unit 9 are respectively installed below the inside of the housing 1; a wireless transceiver module 5, an action execution unit 6 and an alarm 8 are respectively installed above the housing 1, and a zero-flux Hall current sensor 4 is provided below the inside of the fixing block 2;

[0033] The system further comprises: an action execution unit 6 and a phase synchronization circuit 7 are electrically connected to a control unit 9 via wires; and the phase synchronization circuit 7 is electrically connected to a zero-flux Hall current sensor 4, a wireless transceiver module 5 and an alarm 8 via wires.

[0034] The zero-flux Hall current sensor 4 is set up to collect the ground wire leakage current and insulation resistance in real time, ensuring the reliability and stability of the cable capacitance leakage current measurement accuracy. Once a short circuit is found in the cable, the signal is transmitted to the wireless transceiver module 5. At the same time, the wireless transceiver module 5 transmits the signal to the phase synchronization circuit 7, so that the phase synchronization circuit 7 is responsible for comparing the voltage information of the power grid with the phase of the leakage signal to obtain the phase difference between the two. The control unit 9 then judges the leakage current of each phase based on the calculated phase difference. If the alarm condition is met, the control unit 9 will control the alarm 8 to sound an alarm to remind the staff to deal with it in time. At the same time, the action execution unit 6 executes to cut off the power supply line of the cable.

[0035] Embodiment 2: Different from embodiment 1, this embodiment utilizes a rotating worm 14 to facilitate assembly and disassembly of the device. Figure 1 、 Figure 3 、 Figure 5 and Figure 6As shown, a through slot 3 is provided on the upper part of the interior of the fixed block 2, and a worm 14 is connected to the lower part of the through slot 3 inside the fixed block 2, and a worm wheel 15 is rotatably connected to the lower part of the worm 14 inside the fixed block 2 through an axis, the worm 14 and the fixed block 2 are connected by a bearing, and the worm 14 and the two worm wheels 15 are meshed with each other, and the right end of the worm 14 extends to the right side of the interior of the fixed block 2; a threaded rod 16 is provided below the worm 14 inside the fixed block 2, and the top of the threaded rod 16 is connected to the shaft end of the worm wheel 15 through a bevel gear set, and a movable block 17 is sleeved on the outer side of the lower end of the threaded rod 16, and the two threaded rods 16 are rotatably connected to The inside of the fixed block 2 is connected by a threaded connection between the threaded rod 16 and the movable block 17, and the side of the movable block 17 is slidably connected to the inner wall of the fixed block 2; the inner wall of the through groove 3 is symmetrically provided with a clamping plate 13, and the opposite ends of the two clamping plates 13 are fixedly connected with a fitting block 18, and the end of the fitting block 18 away from the clamping plate 13 extends into the interior of the fixed block 2, and the side of one end of the fitting block 18 is slidably provided in the interior of the fixed block 2 through a slider 19, and a return spring 20 is installed between the end of the slider 19 and the inner wall of the fixed block 2, and the opposite ends of the fitting block 18 and the movable block 17 are both inclined, and the inclined surfaces of the fitting block 18 and the movable block 17 fit together;

[0036] Pass the cable through the through slot 3, and then rotate the worm 14 forward so that the worm 14 drives the two worm wheels 15 to rotate, and then the worm wheel 15 uses the bevel gear set to drive the threaded rod 16 to rotate, so that the movable block 17 moves downward and squeezes the fitting block 18, causing it to move (the slider 19 slides inside the fixed block 2 and stretches the return spring 20). At this time, the two clamping plates 13 move relative to each other and clamp and fix the passed cable, which makes it easy to install the device on the cable without complicated installation. When the device needs to be removed, just rotate the worm 14 in the opposite direction. At this time, the two movable blocks 17 reset upward and no longer squeeze the fitting block 18, so that it resets under the elastic force of the return spring 20, and then the two clamping plates 13 move in the opposite direction and no longer clamp and fix the cable, which makes it easy to remove the device for maintenance.

[0037] Example 3: Different from Example 2, this example uses two warning signs 10 to rotate downward, which can help the staff to find the short circuit position immediately. Figure 1 、 Figure 2 and Figure 4As shown, warning signs 10 are connected to the bottom of both sides of the fixed block 2, and torsion springs 11 are installed at the connection positions between the axial ends of the two warning signs 10 and the fixed block 2. The two warning signs 10 are connected by a pull rope 12. The two warning signs 10 and the fixed block 2 are hingedly connected. The two ends of the pull rope 12 are fixedly connected to the opposite surfaces of the two warning signs 10, and the pull rope 12 passes through the fixed block 2 and the interior of the through slot 3;

[0038] When a short circuit occurs in the cable, the temperature in the through slot 3 will rise and reach the melting point of the pull rope 12, causing the pull rope 12 to melt. At this time, the two warning signs 10 rotate downward under the accumulated force of the torsion spring 11, thereby further reminding the staff that the cable has a short circuit and allowing the staff to find the location of the short circuit as soon as possible.

[0039] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cable short circuit measurement alarm device, comprising a housing (1), a fixing block (2) fixed to the top of the housing (1), and a phase synchronization circuit (7) and a control unit (9) respectively installed below the interior of the housing (1); A wireless transceiver module (5), an action execution unit (6), and an alarm (8) are respectively installed above the housing (1), and a zero-flux Hall current sensor (4) is provided below the interior of the fixed block (2); It is characterized by: Also includes: A through slot (3) is provided above the interior of the fixed block (2), and a worm (14) is connected to the interior of the fixed block (2) below the through slot (3), and a worm wheel (15) is rotatably connected to the interior of the fixed block (2) below the worm (14) via an axis. A threaded rod (16) is provided inside the fixed block (2) below the worm (14), and the top of the threaded rod (16) is connected to the shaft end of the worm wheel (15) through a bevel gear set, and a movable block (17) is sleeved on the outer side of the lower end of the threaded rod (16); The inner wall of the through groove (3) is symmetrically provided with clamping plates (13), and opposite ends of the two clamping plates (13) are fixedly connected with fitting blocks (18).

2. A cable short circuit measurement alarm device according to claim 1, characterized in that: The worm (14) is connected to the fixed block (2) by a bearing, and the worm (14) is meshed with the two worm wheels (15). The right end of the worm (14) extends to the right side of the fixed block (2).

3. The cable short circuit measurement and alarm device according to claim 1, characterized in that: The two threaded rods (16) are both rotatably connected to the interior of the fixed block (2), and the threaded rods (16) and the movable block (17) are threadedly connected, and the side surface of the movable block (17) and the inner wall of the fixed block (2) are slidably connected.

4. The cable short circuit measurement alarm device according to claim 1, characterized in that: One end of the fitting block (18) away from the clamping plate (13) extends into the interior of the fixed block (2), and the side surface of one end of the fitting block (18) is slidably arranged in the interior of the fixed block (2) through a slider (19), and a return spring (20) is installed between the end of the slider (19) and the inner wall of the fixed block (2). The opposite ends of the fitting block (18) and the movable block (17) are both inclined, and the inclined surfaces of the fitting block (18) and the movable block (17) fit together.

5. The cable short circuit measurement alarm device according to claim 1, characterized in that: The action execution unit (6) and the phase synchronization circuit (7) are electrically connected to the control unit (9) via wires, and the phase synchronization circuit (7) is electrically connected to the zero-flux Hall current sensor (4), the wireless transceiver module (5) and the alarm (8) via wires.

6. The cable short circuit measurement and alarm device according to claim 1, characterized in that: Warning signs (10) are connected to the lower sides of both sides of the fixed block (2), and torsion springs (11) are installed at the connection positions between the shaft ends of the two warning signs (10) and the fixed block (2), and the two warning signs (10) are connected by a pull rope (12).

7. The cable short circuit measurement and alarm device according to claim 6, characterized in that: The two warning signs (10) are hingedly connected to the fixed block (2), the two ends of the pull rope (12) are fixedly connected to the opposite surfaces of the two warning signs (10), and the pull rope (12) passes through the fixed block (2) and the interior of the through slot (3).

Images