Voltage detection device with overload protection mechanism for electrical equipment maintenance

Abstract

The invention discloses an electrical equipment maintenance voltage detection device with an overload protection mechanism, and relates to the technical field of voltage detection, the electrical equipment maintenance voltage detection device comprises an insulation shell, the insulation shell is internally provided with a detection meter main body, and the bottom of the insulation shell is provided with a first meter pen conductive seat; a second meter pen conductive seat is arranged at the position, located on one side of the first meter pen conductive seat, of the bottom of the insulating shell, detection meter pens are electrically connected to the bottoms of the first meter pen conductive seat and the second meter pen conductive seat, a base is arranged in the insulating shell, and an electromagnet is installed on the base; when voltage is detected, only the detection meter pen needs to be in contact with the voltage input end and the voltage output end of corresponding electrical equipment, range switching can be automatically carried out during detection, the voltage can be detected, operation is convenient and fast, overload protection can be carried out, the detection accuracy is high, and the reliability is high. And electrical components in the detection meter main body are prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of voltage detection, in particular to a voltage detection device for repairing electrical equipment with an overload protection mechanism. Background Art

[0002] When electrical equipment fails during use, in order to troubleshoot the fault point of the electrical equipment, it is necessary to detect the voltage, resistance and current of the electrical equipment during operation. When detecting the voltage, a voltage detector is usually used for detection. It is also commonly called a voltage detection meter. It is a simple electrical testing tool used to check whether there is an electric charge in a circuit or component. The device detects the electric field generated by the voltage on the wire or other electrical system to check whether the wire or system is energized. When using a voltage detection meter for detection, it is necessary to adjust the knob on the dial according to the voltage to the appropriate voltage detection range. If the voltage is small and the range is large, the meter pointer deflects less, making it inconvenient to observe the pointer reading. If the voltage is large and the range is small, the meter pointer deflects to the maximum and the voltage value cannot be obtained.

[0003] There are many shortcomings in the common voltage detection meters in the prior art. On the one hand, the voltage detection meters currently on the market do not have an overload protection function. When the electrical equipment is overloaded, it is impossible to know in advance whether the electrical equipment failure has caused overvoltage. After using the meter pen to detect the voltage, it is easy to damage the electronic components in the internal circuit of the meter, causing the voltage detection meter to be damaged and unable to continue to be used. On the other hand, when detecting normal voltage, since the voltage of different electrical equipment may be different, it is necessary to manually adjust the range gear in advance during detection so that the voltage value is within the range, which is not convenient to use. Summary of the invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. Specifically, the purpose of the present invention is to provide a voltage detection device for electrical equipment maintenance with an overload protection mechanism, so as to solve the problems raised in the above background technology that the existing voltage detection meter does not have an overload protection function and it is troublesome to manually adjust the voltage detection range.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a voltage detection device for repairing electrical equipment with an overload protection mechanism, comprising an insulating shell, a detection meter body is arranged inside the insulating shell, and a first test lead conductive seat is arranged at the bottom of the insulating shell, and a second test lead conductive seat is arranged at the bottom of the insulating shell on one side of the first test lead conductive seat, the bottoms of the first test lead conductive seat and the second test lead conductive seat are both electrically connected with detection leads, a base is arranged inside the insulating shell, an electromagnet is installed on the base, and a range self-switching mechanism is arranged between the detection meter body and the second test lead conductive seat.

[0006] Preferably, the first test lead conductive socket is electrically connected to the test meter body, and the two ends of the electromagnet are electrically connected to the top of the first test lead conductive socket and the top of the second test lead conductive socket respectively.

[0007] Preferably, the range self-switching mechanism includes a first range seat, a second range seat and a third range seat which are sequentially installed inside an insulating shell, the inner wall of the insulating shell is provided with an insulating column extending to one end of the electromagnet, the outer wall of the insulating column is provided with an armature plate slidably matched therewith, a first spring is connected between the armature plate and the inner wall of the insulating shell, the end of the insulating column is connected to a limiting block, the top of the armature plate is connected to a first conductive rod located below the first range seat, and the bottoms of the first range seat, the second range seat and the third range seat are all provided with conductive structures.

[0008] Preferably, the first range seat, the second range seat and the third range seat are respectively electrically connected to the detection meter body, and the armature plate is electrically connected to the second test lead conductive seat.

[0009] Preferably, the surfaces of the first range seat, the second range seat and the third range seat are electrically connected with indicator lights.

[0010] Preferably, the conductive structure includes a connecting block arranged at the bottom of the first range seat, the second range seat and the third range seat, the outer wall of the connecting block is provided with a conductive column, the outer wall of the conductive column is sleeved with a second conductive rod, a vortex spring is connected between the conductive column and the second conductive rod, a conductive slider slidably matched with the second conductive rod is provided at the bottom of the second conductive rod, a second spring is connected between the end of the conductive slider and the inner wall of the second conductive rod, and one side of the conductive slider is set as an inclined surface.

[0011] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, during the process of detecting normal voltage, when the voltage is relatively small, the electromagnet is energized to generate magnetic force, and the magnetic force attracts the armature plate to slide rightward on the insulating column and pull the first spring. At this time, the first conductive rod on the top of the armature plate contacts the left side wall of the conductive sliding block on the first range seat. Since the magnetic force is smaller than the elastic force of the vortex spring on the first range seat, the first conductive rod is limited. When the voltage exceeds the measuring range of the first range seat, the magnetic force is larger than the elastic force of the vortex spring on the first range seat and smaller than the elastic force of the vortex spring on the second range seat, and the first conductive rod pushes The conductive slider on the first range seat is moved, so that the second conductive rod rotates outside the conductive column and drives the vortex spring to deform, until the first conductive rod moves over the conductive slider on the first range seat, and the vortex spring drives the second conductive rod to rotate and reset, and the movement of the first conductive rod is blocked by the conductive slider on the second range seat for position limiting. When the voltage exceeds the measurement range of the second range seat, the first conductive rod moves to the side wall of the conductive slider on the third range seat in the same way, so that the appropriate voltage range can be automatically switched according to the voltage size for detection during detection; In the present invention, when detecting overload voltage, the magnetic force of the electromagnet causes the armature plate to move to the rightmost end of the insulating column and be limited by the limit block, and the first conductive rod moves over the conductive slider on the third range seat, so that the voltage passing through the detection meter body is disconnected, thereby overload protection is performed on the detection meter body to prevent damage to the electrical components inside the detection meter body; In summary, when the voltage detection device detects voltage, it only needs to touch the detection probe to the corresponding voltage input terminal and voltage output terminal of the electrical equipment, and the range can be automatically switched during detection to detect the voltage, which is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of a partial structure of the range self-switching mechanism of the present invention; Figure 4 For the present invention Figure 2 Enlarged view of point A in .

[0013] In the figure: 1. insulating shell; 2. test meter body; 3. first test lead conductive seat; 4. second test lead conductive seat; 5. test lead; 6. base; 7. electromagnet; 8. first range seat; 9. second range seat; 10. third range seat; 11. insulating column; 12. armature plate; 13. first spring; 14. limit block; 15. first conductive rod; 16. connecting block; 17. conductive column; 18. second conductive rod; 19. vortex spring; 20. conductive slider; 21. second spring. DETAILED DESCRIPTION

[0014] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0015] See also Figure 1-4 The present invention provides a technical solution: a voltage detection device for repairing electrical equipment with an overload protection mechanism, comprising an insulating shell 1, a detection meter body 2 is arranged inside the insulating shell 1, and a first test pen conductive seat 3 is arranged at the bottom of the insulating shell 1, and a second test pen conductive seat 4 is arranged at the bottom of the insulating shell 1 on one side of the first test pen conductive seat 3, the bottoms of the first test pen conductive seat 3 and the second test pen conductive seat 4 are both electrically connected with a detection pen 5, a base 6 is arranged inside the insulating shell 1, an electromagnet 7 is installed on the base 6, and a range self-switching mechanism is arranged between the detection meter body 2 and the second test pen conductive seat 4.

[0016] The first test lead conductive socket 3 is electrically connected to the test meter body 2 , and two ends of the electromagnet 7 are electrically connected to the top of the first test lead conductive socket 3 and the top of the second test lead conductive socket 4 , respectively.

[0017] The range self-switching mechanism includes a first range seat 8, a second range seat 9 and a third range seat 10 which are sequentially installed inside the insulating shell 1. The inner wall of the insulating shell 1 is provided with an insulating column 11 extending to one end of the electromagnet 7, and the outer wall of the insulating column 11 is provided with an armature plate 12 which slides with it. A first spring 13 is connected between the armature plate 12 and the inner wall of the insulating shell 1, and the end of the insulating column 11 is connected to a limit block 14. The top of the armature plate 12 is connected to a first conductive rod 15 located below the first range seat 8, and the bottoms of the first range seat 8, the second range seat 9 and the third range seat 10 are all provided with conductive structures.

[0018] The first range seat 8 , the second range seat 9 and the third range seat 10 are respectively electrically connected to the detection meter body 2 , and the armature plate 12 is electrically connected to the second test lead conductive seat 4 .

[0019] Indicator lights are electrically connected to the surfaces of the first range seat 8 , the second range seat 9 and the third range seat 10 .

[0020] The conductive structure includes a connecting block 16 arranged at the bottom of the first range seat 8, the second range seat 9 and the third range seat 10, the outer wall of the connecting block 16 is provided with a conductive column 17, the outer wall of the conductive column 17 is sleeved with a second conductive rod 18, a vortex spring 19 is connected between the conductive column 17 and the second conductive rod 18, a conductive slider 20 slidably matched with the second conductive rod 18 is provided at the bottom of the second conductive rod 18, a second spring 21 is connected between the end of the conductive slider 20 and the inner wall of the second conductive rod 18, and one side of the conductive slider 20 is set as an inclined surface.

[0021] Working principle: When using the voltage detection device for electrical equipment maintenance with an overload protection mechanism, the left detection probe 5 is brought into contact with the voltage input terminal of the electrical equipment, and then the right detection probe 5 is released from the voltage output terminal of the electrical equipment. In the initial state, the first conductive rod 15 is in contact with the side wall of the conductive slider 20 on the first range seat 8, wherein the elastic force of the first spring 13 is greater than the elastic force of the second spring 21, and the elastic force of the first spring 13 is less than the elastic force of the vortex spring 19, and the elastic force of the vortex spring 19 in the conductive structure on the first range seat 8, the second range seat 9 and the third range seat 10 increases in sequence, and the minimum magnetic force that can be generated by the electromagnet 7 after being energized is less than the elastic force of the vortex spring 19 on the first range seat 8, and greater than the elastic force of the first spring 13, and the maximum magnetic force generated is greater than the elastic force of the vortex spring 19 in the conductive structure on the third range seat 10; When the voltage is small, the electromagnet 7 is energized to generate magnetic force, and the magnetic force attracts the armature plate 12 to slide to the right on the insulating column 11 and pull the first spring 13. At this time, the first conductive rod 15 on the top of the armature plate 12 contacts the left side wall of the conductive slider 20 on the first range seat 8. Since the magnetic force is smaller than the elastic force of the vortex spring 19 on the first range seat 8, the first conductive rod 15 is limited. At this time, observe the pointer reading on the detection meter body 2. When the voltage exceeds the measuring range of the first range seat 8, the magnetic force is greater than the elastic force of the vortex spring 19 on the first range seat 8 and less than the elastic force of the vortex spring 19 on the second range seat 9. The first conductive rod 15 pushes the conductive slider 20 on the first range seat 8, causing the second conductive rod 18 to rotate outside the conductive column 17 and drive the vortex spring 19 to deform until the first conductive rod 15 moves past the conductive slider 20 on the first range seat 8. The spring 19 drives the second conductive rod 18 to rotate and reset, and the movement of the first conductive rod 15 is blocked by the conductive slider 20 on the second range seat 9 for limiting. At this time, the pointer reading on the detection meter body 2 is observed. When the voltage exceeds the measuring range of the second range seat 9, the first conductive rod 15 moves to the side wall of the conductive slider 20 on the third range seat 10. At this time, the pointer reading on the detection meter body 2 can be observed. When switching to a different range seat, the indicator light of the corresponding range seat is turned on after power is turned on. When the detection is completed, the detection probe 5 is released, the magnetic force of the electromagnet 7 disappears, and the first spring 13 drives the armature plate 12 to slide and reset. The first conductive rod 15 pushes the right side wall slope of the conductive slider 20, and the conductive slider 20 slides into the second conductive rod 18 and squeezes the second spring 21 until the first conductive rod 15 moves over the conductive slider 20, and the armature plate 12 slides and resets; When the voltage exceeds the measuring range and forms an overload, the magnetic force of the electromagnet 7 causes the armature plate 12 to move to the rightmost end of the insulating column 11 and is limited by the limit block 14, and the first conductive rod 15 moves over the conductive slider 20 on the third range seat 10, so that the voltage passing through the test meter body 2 is disconnected, thereby protecting the test meter body 2 from overload and preventing damage to the internal electrical components of the test meter body 2.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to 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 protection scope of the present invention.

Claims

1. A voltage detection device for electrical equipment maintenance with an overload protection mechanism, comprising an insulating housing (1), characterized in that: A detection meter body (2) is arranged inside the insulating shell (1), and a first test pen conductive seat (3) is arranged at the bottom of the insulating shell (1), and a second test pen conductive seat (4) is arranged at the bottom of the insulating shell (1) on one side of the first test pen conductive seat (3), and the bottoms of the first test pen conductive seat (3) and the second test pen conductive seat (4) are both electrically connected to a detection pen (5), a base (6) is arranged inside the insulating shell (1), and an electromagnet (7) is installed on the base (6), and a range self-switching mechanism is arranged between the detection meter body (2) and the second test pen conductive seat (4).

2. A voltage detection device for electrical equipment maintenance with an overload protection mechanism according to claim 1, characterized in that: The first test lead conductive seat (3) and the test meter body (2) are electrically connected, and the two ends of the electromagnet (7) are electrically connected to the top of the first test lead conductive seat (3) and the top of the second test lead conductive seat (4), respectively.

3. A voltage detection device for electrical equipment maintenance with an overload protection mechanism according to claim 1, characterized in that: The range self-switching mechanism comprises a first range seat (8), a second range seat (9) and a third range seat (10) which are sequentially mounted inside an insulating housing (1); an inner wall of the insulating housing (1) is provided with an insulating column (11) extending to one end of the electromagnet (7); an outer wall of the insulating column (11) is provided with an armature plate (12) which is slidably matched with the insulating column; a first spring (13) is connected between the armature plate (12) and the inner wall of the insulating housing (1); an end of the insulating column (11) is connected to a limit block (14); the top of the armature plate (12) is connected to a first conductive rod (15) located below the first range seat (8); and the bottoms of the first range seat (8), the second range seat (9) and the third range seat (10) are all provided with conductive structures.

4. A voltage detection device for electrical equipment maintenance with an overload protection mechanism according to claim 3, characterized in that: The first range seat (8), the second range seat (9) and the third range seat (10) are respectively electrically connected to the detection meter body (2), and the armature plate (12) is electrically connected to the second test lead conductive seat (4).

5. A voltage detection device for electrical equipment maintenance with an overload protection mechanism according to claim 3, characterized in that: Indicator lights are electrically connected to the surfaces of the first range seat (8), the second range seat (9) and the third range seat (10).

6. A voltage detection device for electrical equipment maintenance with an overload protection mechanism according to claim 3, characterized in that: The conductive structure comprises a connecting block (16) arranged at the bottom of the first range seat (8), the second range seat (9) and the third range seat (10); a conductive column (17) is arranged on the outer wall of the connecting block (16); a second conductive rod (18) is sleeved on the outer wall of the conductive column (17); a vortex spring (19) is connected between the conductive column (17) and the second conductive rod (18); a conductive slider (20) slidably matched with the second conductive rod (18) is arranged at the bottom of the second conductive rod (18); a second spring (21) is connected between the end of the conductive slider (20) and the inner wall of the second conductive rod (18); and one side of the conductive slider (20) is arranged as an inclined surface.

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