Switch withstand voltage test protection device

Abstract

The utility model provides a switch withstand voltage test protection device, which comprises a base, a clamp arranged at the top of the base and a pop-up mechanism arranged in the base and corresponding to the position below the clamp, and the pop-up mechanism comprises an elastic telescopic rod embedded in the base and a top block arranged at the top end of the elastic telescopic rod. The elastic telescopic rod is further provided with a control assembly, and when high current passes through the electrode, the control assembly controls the elastic telescopic rod to extend, so that the top block extends out of the surface of the base. According to the utility model, when the switch in the test is short-circuited or is broken down by high voltage to be conducted, high current passes through the interior of the control assembly, the elastic telescopic rod is driven to extend, and the switch mounted on the clamp is ejected out through the ejection block, so that the switch is separated from the contact with the electrode to realize physical disconnection, and even if the circuit breaks down, the switch cannot be damaged. And if the short-circuit switch does not work normally, the connection of the switch can be released, so that the safety coefficient is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of switch testing devices, in particular to a switch withstand voltage testing protection device. Background Art

[0002] In order to ensure the safe use of electrical products and prevent leakage accidents, electrical products must be subjected to a voltage withstand test before leaving the factory. The voltage withstand test (puncture test) is one of the main methods for testing the overvoltage resistance of electrical appliances, electrical equipment, electrical devices, electrical circuits and electrical safety equipment. It is divided into two types: power frequency voltage withstand test and DC voltage withstand test. The power frequency voltage withstand test has a test voltage of more than one to several times the rated voltage of the equipment under test. The specific principle of the voltage withstand test is to ground the outer casing of the electrical product, and then connect the electrode to high voltage. By detecting the current at the grounding end of the outer casing of the electrical product, the leakage of the electrical product under high voltage operation can be tested.

[0003] In the prior art, electrical products are usually installed on a power socket and powered on, and then a probe connected to a detection device is used to contact the outer casing of the electrical product to detect leakage current. For example, Chinese utility model patent application number CN2021216733277 discloses a live voltage withstand test device for DC coil switching electrical appliances, which is characterized by comprising a DC power supply, a protective circuit breaker, a contactor, a voltage regulator, a high-voltage insulation transformer, a high-voltage rectifier bridge, and a voltage withstand source. The DC power supply is connected to the input end of the contactor through the protective circuit breaker to control the power supply of the test device. The output end of the contactor is connected to the input end of the high-voltage insulation transformer through the voltage regulator. The output end of the high-voltage insulation transformer is connected to the input end of the high-voltage rectifier bridge. The high-voltage rectifier bridge is used to cut off the forward voltage and conduct the reverse voltage. The output end of the high-voltage rectifier bridge is connected to the coil of the test product. The voltage withstand source is connected to the coil and contacts of the test product to perform a voltage withstand test on the test product.

[0004] However, the aforementioned withstand voltage test device still has certain issues. Specifically, its protection against high-voltage breakdown and short circuits relies on grounding devices in the switch housing and short-circuit protection switches. However, these electrical devices can malfunction in high-voltage, high-current environments and after prolonged use, posing a safety hazard. Therefore, a more robust protection device is needed. Utility Model Content

[0005] In response to the deficiencies in the prior art, the present invention provides a switch withstand voltage test protection device, which solves the problem in the prior art that when electrical equipment is used as a withstand voltage test protection device, it may fail in high voltage, high current environment and after long-term use, resulting in safety hazards.

[0006] According to an embodiment of the present utility model, a switch withstand voltage test protection device includes a base, a clamp arranged on the top of the base, and a pop-up mechanism arranged in the base at a position below the clamp, the clamp is provided with an electrode connected to the corresponding switch circuit, the pop-up mechanism includes an elastic telescopic rod buried in the base and a top block arranged at the top of the elastic telescopic rod, when the elastic telescopic rod is retracted to the shortest state, the top block is just buried on the top surface of the base, so that the top of the top block is flush with the surface of the base, and a control component is also provided on the elastic telescopic rod, the control component is electrically connected to the electrode on the same side of the clamp, so that the control component and the electrode on this side form a parallel circuit, when there is no high current in the electrode, the control component maintains the contraction of the elastic telescopic rod, and when a high current passes through the electrode, the control component controls the elastic telescopic rod to extend, so that the top block extends out of the base surface.

[0007] Furthermore, the base is provided with a receiving cavity at a position below the clamp, the top opening of the receiving cavity is connected to the outside, the pop-up mechanism is exactly arranged in the receiving cavity, and the top block can close the top opening of the receiving cavity.

[0008] Furthermore, the elastic telescopic rod includes a vertically arranged outer rod and an inner rod, wherein the outer rod is fixed and is a hollow structure with an open top, the inner rod is movably arranged inside the outer rod and can slide axially, the top end of the inner rod is connected to the top block, and a first spring is provided between the bottom end of the inner rod and the bottom end surface inside the outer rod. When the top block is retracted inside the base and does not expose the base surface, the first spring is in a compressed state.

[0009] Furthermore, a through hole is provided on the side of the outer rod and passes through horizontally to the interior, and an inwardly concave slot is provided on the outer side of the inner rod. When the inner rod is in a retracted state, the through hole and the slot are arranged correspondingly.

[0010] Furthermore, the control assembly is a horizontally arranged control rod, which can penetrate the through hole and the slot at the same time, thereby fixing the inner rod in a retracted state, or one end of the control rod is disengaged from the slot, so that the inner rod pops up.

[0011] Furthermore, the control rod includes an insertion rod and an adjusting rod, wherein the diameter of the insertion rod is larger than that of the adjusting rod, and the insertion rod is an internal hollow structure. An opening corresponding to the diameter of the adjusting rod is provided on one end face of the insertion rod, so that the adjusting rod can be movably inserted coaxially therein, and a second spring is provided between one end of the adjusting rod located inside the insertion rod and the internal end face of the insertion rod. When one end of the adjusting rod extends out of the insertion rod, the second spring is in a stretched state, and a connecting piece is also provided between the adjusting rod and the insertion rod.

[0012] Furthermore, the connecting member includes a resistance wire and a connecting rope arranged at both ends of the resistance wire, and the adjusting rod includes a thick section and a thin section with different diameters, wherein the thick section is located inside the insertion rod, one end of the thin section extends out of the insertion rod, and the insertion rod is provided with an open end face bent inwardly corresponding to the diameter of the thin section, and the connecting member is correspondingly arranged between the thick section and the end face of the insertion rod, so that the connecting rope is respectively connected to the end of the thick section close to the thin section and the inner side of the end face of the insertion rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this utility model, the ejection mechanism is located within the base, below the fixture used to mount the switch for testing. A control assembly controls the mechanism's operation. When the switch under test shorts or is broken down by a high voltage, a high current flows through the control assembly, driving the elastic telescopic rod to extend, allowing the ejector block to extend beyond the base surface. This in turn ejects the switch mounted on the fixture, breaking contact with the electrode and achieving a physical disconnect. Even if a circuit malfunction results in incomplete grounding or the short-circuit switch malfunctions, the switch can be disconnected, protecting personnel and providing a higher safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the lateral internal structure of an embodiment of the utility model.

[0017] Figure 3 Schematic diagram of the ejection mechanism in an embodiment of the present invention.

[0018] Figure 4 Schematic diagram of the control component in the embodiment of the present utility model.

[0019] In the above drawings: 1. base; 2. clamp; 3. elastic telescopic rod; 4. top block; 5. first spring; 6. control rod; 7. connector; 11. accommodating chamber; 21. electrode; 31. outer rod; 32. inner rod; 61. adjusting rod; 62. inserting rod; 71. resistance wire; 72. connecting rope; 311. through hole; 321. slot; 611. thick section; 612. thin section. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1As shown, an embodiment of the present invention provides a switch withstand voltage test protection device, comprising a base 1, a fixture 2 disposed on the top of the base 1, and a pop-up mechanism disposed within the base 1 at a position corresponding to the bottom of the fixture 2. In this embodiment, the base 1 is a square platform structure, and the fixture 2 is disposed at the center of the top of the base 1. The fixture 2 is provided with electrodes 21 corresponding to the switch circuit input. The switch can be placed into the fixture 2 from above for positioning, and the switch's electrical terminals are aligned with the electrodes 21 on the fixture 2.

[0022] like Figure 2 As shown, in this embodiment, the pop-up mechanism includes an elastic telescopic rod 3 embedded in the base 1 and a top block 4 disposed at the top of the elastic telescopic rod 3. When the elastic telescopic rod 3 is retracted to its shortest position, the top block 4 is embedded in the top surface of the base 1, so that the top of the top block 4 is flush with the surface of the base 1. Preferably, the base 1 is provided with a receiving cavity 11 at a position corresponding to the position below the clamp 2. The top of the receiving cavity 11 is open to the outside, and the pop-up mechanism is disposed in the receiving cavity 11, and the top block 4 can close the top opening of the receiving cavity 11.

[0023] Specifically, the elastic telescopic rod 3 comprises a vertically arranged outer rod 31 and an inner rod 32. The outer rod 31 is fixed and hollow with an open top. The inner rod 32 is movably mounted inside the outer rod 31 and can slide axially. The top end of the inner rod 32 is connected to the top block 4. A first spring 5 is installed between the bottom end of the inner rod 32 and the bottom end surface of the outer rod 31. When the top block 4 is retracted inside the base 1 and does not protrude from the base 1 surface, the first spring 5 is in a compressed state. At this point, the switch can be placed normally for testing.

[0024] The elastic telescopic rod 3 is also equipped with a control assembly, which is electrically connected to an electrode 21 on the same side of the clamp 2. This creates a parallel circuit with the electrode 21 on that side. When no high-rated current flows through electrode 21, the control assembly maintains the elastic telescopic rod 3's contraction. When high-rated current flows through electrode 21, the control assembly controls the elastic telescopic rod 3 to extend, causing the push block 4 to extend beyond the surface of the base 1. At this point, the push block 4 also pushes the switch out of the clamp 2, separating the switch's power terminal from the clamp 2's electrode 21, physically disconnecting the circuit. This disconnection remains intact regardless of whether the various electronic components in the circuit are functioning properly, fundamentally addressing potential safety hazards.

[0025] like Figure 3As shown, in this embodiment, a through-hole 311 extending horizontally through the outer rod 31 is provided on the side of the outer rod 31, and a recessed slot 321 is provided on the outer side of the inner rod 32. When the inner rod 32 is in the retracted state, the through-hole 311 and the slot 321 are aligned. Accordingly, the control assembly is a horizontally arranged control rod 6, which can simultaneously penetrate the through-hole 311 and the slot 321 to secure the inner rod 32 in the retracted state, or one end of the control rod 6 can be released from the slot 321, causing the inner rod 32 to pop upward.

[0026] like Figure 4 As shown, the control rod 6 further includes an insertion rod 62 and an adjustment rod 61, wherein the diameter of the insertion rod 62 is larger than that of the adjustment rod 61, and the insertion rod 62 has an internal hollow structure. An opening corresponding to the diameter of the adjustment rod 61 is provided on one end surface of the insertion rod 62, allowing the adjustment rod 61 to be coaxially inserted therein. A second spring is provided between one end of the adjustment rod 61 located inside the insertion rod 62 and the inner end surface of the insertion rod 62. When one end of the adjustment rod 61 extends outside the insertion rod 62, the second spring is in a tensioned state. A connecting member 7 is further provided between the adjustment rod 61 and the insertion rod 62. The connecting member 7 then pulls the adjustment rod 61, preventing it from moving toward the insertion rod 62, and keeps one end extending outside the insertion rod 62 so that it can extend into the slot 321 to secure the inner rod 32.

[0027] In the specific scheme, the connecting member 7 includes a resistance wire 71 and a connecting rope 72 arranged at both ends of the resistance wire 71, and the adjusting rod 61 includes a thick section 611 and a thin section 612 with different diameters, wherein the thick section 611 is located inside the insertion rod 62, and one end of the thin section 612 extends out of the insertion rod 62, and the insertion rod 62 is provided with an open end face bent inward corresponding to the diameter of the thin section 612, and the connecting member 7 is correspondingly arranged between the thick section 611 and the end face of the insertion rod 62, so that the connecting rope 72 is respectively connected to the end of the thick section 611 close to the thin section 612 and the inner side of the end face of the insertion rod 62. When a short circuit or high-voltage breakdown occurs, a high current will flow through the electrode 21, and a high current will also flow through the resistance wire 71 connected in parallel with the electrode 21, causing the resistance wire 71 to melt. At this time, the connecting rope 72 loses its connection ability, and the adjusting rod 61 is pulled toward the insertion rod 62 under the action of the second spring, and disengages from the slot 321. After the inner rod 32 loses its fixation, it moves upward under the action of the first spring 5, driving the top block 4 to push out the switch, thereby achieving physical disconnection.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A switch withstand voltage test protection device, characterized by: It includes a base, a clamp arranged on the top of the base, and a pop-up mechanism arranged at a position below the clamp inside the base, wherein the clamp is provided with an electrode connected to the corresponding switch circuit, and the pop-up mechanism includes an elastic telescopic rod buried in the base and a top block arranged at the top of the elastic telescopic rod. When the elastic telescopic rod is retracted to the shortest state, the top block is just buried on the top surface of the base, so that the top of the top block is flush with the surface of the base. A control component is also provided on the elastic telescopic rod, and the control component is electrically connected to the electrode on the same side of the clamp, so that the control component forms a parallel circuit with the electrode on this side. When there is no high current in the electrode, the control component maintains the contraction of the elastic telescopic rod. When a high current passes through the electrode, the control component controls the extension of the elastic telescopic rod, so that the top block extends out of the surface of the base.

2. A switch withstand voltage test protection device according to claim 1, characterized in that: The base is provided with an accommodating cavity at a position below the corresponding clamp, the top opening of the accommodating cavity is connected to the outside, the pop-up mechanism is exactly arranged in the accommodating cavity, and the top block can close the top opening of the accommodating cavity.

3. The switch withstand voltage test protection device according to claim 1, characterized in that: The elastic telescopic rod includes a vertically arranged outer rod and an inner rod, wherein the outer rod is fixed and is a hollow structure with an open top. The inner rod is movably arranged inside the outer rod and can slide axially. The top end of the inner rod is connected to the top block. A first spring is provided between the bottom end of the inner rod and the bottom end surface inside the outer rod. When the top block is retracted inside the base and does not expose the base surface, the first spring is in a compressed state.

4. A switch withstand voltage test protection device according to claim 3, characterized in that: The side surface of the outer rod is provided with a through hole which passes horizontally to the inside, and the outer side of the inner rod is provided with an inwardly concave clamping groove. When the inner rod is in a retracted state, the through hole and the clamping groove are arranged correspondingly.

5. A switch withstand voltage test protection device according to claim 4, characterized in that: The control assembly is a horizontally arranged control rod, which can penetrate the through hole and the slot at the same time, thereby fixing the inner rod in a retracted state, or one end of the control rod can be separated from the slot, so that the inner rod pops up.

6. A switch withstand voltage test protection device according to claim 5, characterized in that: The control rod includes an insertion rod and an adjusting rod, wherein the diameter of the insertion rod is larger than that of the adjusting rod, and the insertion rod is an internal hollow structure. An opening corresponding to the diameter of the adjusting rod is provided on one end surface of the insertion rod, so that the adjusting rod can be movably coaxially inserted into the interior thereof, and a second spring is provided between one end of the adjusting rod located inside the insertion rod and the internal end surface of the insertion rod. When one end of the adjusting rod extends out of the insertion rod, the second spring is in a stretched state, and a connecting piece is also provided between the adjusting rod and the insertion rod.

7. A switch withstand voltage test protection device according to claim 6, characterized in that: The connecting piece includes a resistance wire and a connecting rope arranged at both ends of the resistance wire. The adjusting rod includes a thick section and a thin section with different diameters, wherein the thick section is located inside the insertion rod, one end of the thin section extends out of the insertion rod, and the insertion rod is provided with an open end face bent inwardly corresponding to the diameter of the thin section. The connecting piece is correspondingly arranged between the thick section and the end face of the insertion rod, so that the connecting rope is respectively connected to the end of the thick section close to the thin section and the inner side of the end face of the insertion rod.

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