A clamping mechanism and grounding clamp

Abstract

This utility model relates to the field of grounding clamps. It discloses a clamping mechanism and a grounding clamp, including a clamping unit. The clamping unit includes a power supply, a current relay, a current transformer fixedly sleeved on the outer ring of a fixed tube, an electromagnetic ring lock fixed to one side of the handle, and a warning light installed on the surface of the electromagnetic ring lock. The electromagnetic ring lock has at least two locking tongues distributed around its inner circumference, and the locking tongues are connected to the inner ring of the electromagnetic ring lock by a spring. The beneficial effects of this utility model are: by using the current transformer to sense the current in the grounding wire and converting a large current into a small current, and by controlling the normally closed contact of the current relay, the movement of the locking tongues and the switching of the warning light are achieved. The movement of the locking tongues clamps and fixes the handle, ensuring that when the equipment is suddenly powered on, it prevents personnel from operating the handle and causing injury.

Description

Technical Field

[0001] This utility model relates to the field of grounding clamps, and in particular to a clamping mechanism and a grounding clamp. Background Technology

[0002] When equipment is under power outage for maintenance, a grounding wire is typically suspended to ensure the safety of maintenance personnel. The grounding wire is removed after maintenance is complete. Currently, commonly used grounding clamps are purely manually operated mechanical structures, consisting of a grounding wire and a clamp. If the equipment is suddenly powered on or has induced voltage while the grounding wire is being removed, the operator faces a risk of electric shock.

[0003] In the existing technology, when the equipment is suddenly powered on or has induced electricity, it is impossible to fix the grounding clamp in time. Rash operation may lead to direct electric shock or electric arc, causing injury to the staff. At the same time, the existing technology cannot directly cooperate with the clamping mechanism to form a protective situation. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is that when the equipment is suddenly powered on or has induced electricity, it is impossible to fix the grounding clamp in time. Rash operation may lead to direct electric shock or electric arc, causing injury to the staff.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a clamping mechanism, which includes a clamping unit. The clamping unit includes a power supply, a current relay, a current transformer fixedly sleeved on the outer ring of a fixed tube, an electromagnetic ring lock fixed on one side of the handle, and a warning light installed on the surface of the electromagnetic ring lock. The electromagnetic ring lock has at least two locking tongues distributed on its inner circumference, and the locking tongues are connected to the inner ring of the electromagnetic ring lock by an elastic element.

[0006] In a preferred embodiment of the clamping mechanism of this utility model: the current transformer is used to detect the current, convert the large current on the primary side into a small current on the secondary side, and transmit the small current signal to the current relay through wiring.

[0007] In a preferred embodiment of the clamping mechanism of this utility model: the current relay is used to receive the current signal in the current transformer and control the on / off of the circuit where the electromagnetic ring lock and the warning light are located.

[0008] In a preferred embodiment of the clamping mechanism of this utility model: the two ends of the coil in the electromagnetic ring lock are connected in series with the warning light, the normally closed contact of the current relay and the power supply to control the movement of the lock tongue.

[0009] The beneficial effects of this utility model are as follows: by using a current transformer to sense the current in the grounding wire and converting the large current into a small current, and by controlling the normally closed contacts of the current relay, the movement of the locking tongue and the switching of the warning light are realized. The movement of the locking tongue achieves the clamping and fixing of the handle, ensuring that when the equipment is suddenly powered on, it prevents the staff from operating the handle and causing injury.

[0010] Therefore, the technical problem to be solved by this utility model is that in the prior art, the grounding clamp itself cannot directly cooperate with the clamping mechanism to form a protective structure.

[0011] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a grounding clamp, which includes a grounding unit. The grounding unit includes a fixing component, a handle disposed on one side of the fixing component, a fixing tube disposed on the fixing component and parallel to the handle, and a grounding wire electrically connected to the fixing component. The current transformer is sleeved on the outer ring of the fixing tube, and the electromagnetic ring lock is sleeved on the outer ring of the handle, and the central axis of the electromagnetic ring lock coincides with the central axis of the handle.

[0012] In a preferred embodiment of the grounding clamp of this utility model: the fixing component includes a U-shaped frame, an extrusion plate that slides on the inner side wall of the U-shaped frame, and a screw that rotates on one side of the extrusion plate.

[0013] In a preferred embodiment of the grounding clamp of this utility model: a limiting strip is provided on one side of the C-shaped frame, and the limiting strip slides into a notch at one end of the extrusion plate.

[0014] In a preferred embodiment of the grounding clamp of this utility model: the screw passes through the shaped frame along the axial direction of the handle and is fixedly connected to one end of the handle, and the screw is threadedly engaged with the portion of the shaped frame that passes through it.

[0015] In a preferred embodiment of the grounding clamp of this utility model: the fixing tube is sleeved on the outer ring of the grounding wire.

[0016] In a preferred embodiment of the grounding clamp of this utility model, the handle is made of insulating material.

[0017] The beneficial effects of this utility model are as follows: by setting the fixing tube, the conditions for the installation of the clamping unit are provided, the stable installation of the current transformer is realized, and the normal operation of the device is ensured. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0019] Figure 1 A schematic diagram of the clamping mechanism is shown.

[0020] Figure 2 The circuit diagram involving the clamping mechanism is shown;

[0021] Figure 3 A schematic diagram of the clamping mechanism and grounding clamp is shown.

[0022] Figure 4 A partial structural schematic diagram of the grounding clamp is shown. Detailed Implementation

[0023] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0025] Example 1

[0026] Reference Figures 1-2 This is the first embodiment of the present utility model. This embodiment provides a clamping mechanism, which includes a clamping unit 2. By setting the clamping unit 2, when the equipment is under power outage maintenance or when power is suddenly restored or there is induced electricity after maintenance, the clamping unit 2 can clamp and fix the handle 12 in time, restricting the rotation of the handle 12, and preventing the staff from operating the handle 12 and causing injury to the staff.

[0027] Specifically, the clamping unit 2 includes a power supply 24, a current relay 25, a current transformer 21 fixedly sleeved on the outer ring of the fixing tube 13, an electromagnetic ring lock 22 fixed on one side of the handle 12, and a warning light 23 installed on the surface of the electromagnetic ring lock 22.

[0028] Power supply 24 provides the necessary power for the operation of warning light 23 and electromagnetic ring lock 22. Warning light 23 is used to visually determine the electrical status of the equipment during testing, enabling staff to observe the equipment status in a timely manner. Power supply 24 and current relay 25 can be installed in different locations.

[0029] Specifically, the electromagnetic ring lock 22 has at least two locking tongues 221 distributed around its inner circumference, and the locking tongues 221 are connected to the inner ring of the electromagnetic ring lock 22 by an elastic element. The elastic element can be a spring.

[0030] Furthermore, the two ends of the coil in the electromagnetic ring lock 22 are connected in series with the warning light 23, the normally closed contact of the current relay 25, and the power supply 24 to control the movement of the lock tongue 221.

[0031] When the electromagnetic ring lock 22 is energized, the coil in the electromagnetic ring lock 22 has a magnetic attraction effect, which can attract the lock tongue 221 and make it move into the electromagnetic ring lock 22. During the movement, the spring is compressed and the spring cannot be attracted by the electromagnetic ring lock 22. At this time, the handle 12 is not clamped and fixed.

[0032] If the electromagnetic ring lock 22 is not powered, the coil in the electromagnetic ring lock 22 loses its magnetic attraction and loses its attraction effect on the lock tongue 221. At this time, due to the spring's rebound effect, it moves towards the center of the electromagnetic ring lock 22. The spring then pushes the lock tongue 221 to clamp and fix the handle 12.

[0033] When the locking tongue 221 slides on the upper and lower sides of the electromagnetic ring lock 211, a sliding groove can be provided on the part of the electromagnetic ring lock 22 corresponding to the sliding groove, so as to limit the movement of 211 and further increase the clamping effect on the handle 12.

[0034] Specifically, the current transformer 21 is used to detect current, convert the large current on the primary side into a small current on the secondary side, and transmit the small current signal to the current relay 25 through wiring.

[0035] Furthermore, the current relay 25 is used to receive the current signal from the current transformer 21 and control the on / off state of the circuit where the electromagnetic ring lock 22 and the warning light 23 are located.

[0036] The current transformer 21 is sleeved on the outer ring of the fixed tube 13. The primary side of the current transformer 21 can detect the current flowing through the grounding wire 14 in the fixed tube 13. When the current flowing through the grounding wire 14 is detected, the primary side of the current transformer 21 can transmit the detected large current signal to the secondary side of the current transformer 21 and convert it into a small current signal. At this time, the current relay 25 will be energized, causing the normally closed contact of the current relay 25 to open.

[0037] During use, when power is off for maintenance, power supply 24 is turned on. At this time, the normally closed contact of current relay 25 is in the normally closed state, and power supply 24, electromagnetic ring lock 22, current relay 25, and warning light 23 form a circuit, illuminating warning light 23. The coil in electromagnetic ring lock 22 generates magnetic force, which can attract the locking tongue 221, causing it to move into the electromagnetic ring lock 22. During the movement, the spring is compressed, and the spring can no longer be attracted by electromagnetic ring lock 22. At this time, handle 12 can rotate normally. It remains grounded during equipment maintenance. When the equipment is suddenly powered on or induced, current will flow through the ground. When line 14 is transmitted to the ground, it passes through current transformer 21. The primary side of current transformer 21 senses the current and transmits it to the secondary side, supplying power to current relay 25. After receiving the current signal, current relay 25 causes the normally closed contact to open. At this time, warning light 23 turns off, electromagnetic ring lock 22 loses its magnetic attraction, and locking tongue 221 is pushed out by the spring to clamp handle 12. Since the surface of 221 in contact with handle 12 is anti-slip, it can firmly hold handle 12. At this time, the staff cannot operate handle 12, which greatly ensures the safety of the staff.

[0038] Example 2

[0039] Reference Figures 3-4 This is the second embodiment of the present invention. This embodiment is based on the first embodiment. This embodiment provides a grounding clamp, which includes a grounding unit 1. The grounding unit 1 includes a fixing component 11, a handle 12 disposed on one side of the fixing component 11, a fixing tube 13 disposed on the fixing component 11 and parallel to the handle 12, and a grounding wire 14 electrically connected to the fixing component 11.

[0040] By setting up grounding unit 1, the grounding wire 14 can be connected during the inspection process when the equipment is under power outage for maintenance, ensuring the safety of maintenance personnel. The fixing component 11 can be driven by the operating handle 12 to clamp the cable at the maintenance point, ensuring a stable connection and preventing loosening that could cause injury or death.

[0041] The current transformer 21 is sleeved on the outer ring of the fixed tube 13, and the electromagnetic ring lock 22 is sleeved on the outer ring of the handle 12, with the central axis of the electromagnetic ring lock 22 coinciding with the central axis of the handle 12.

[0042] The fixed tube 13 provides installation conditions for the clamping unit 2 and also provides some protection for the grounding wire 14. The electromagnetic ring lock 22 is sleeved on the outer ring of the handle 12 to ensure the clamping effect of the handle 12.

[0043] When in use, first confirm that the equipment is powered off, and connect one end of the grounding wire 14 to the grounding terminal or grounding stake. Then, the operator holds the handle 12 and controls the fixing component 11 to clamp and fix the equipment terminal or conductor that needs to be grounded, forming an electrical path.

[0044] Example 3

[0045] Reference Figures 3-4 This is the third embodiment of the present invention. This embodiment is based on the first two embodiments. This embodiment also includes a fixing component 11, which includes a U-shaped frame 111, an extrusion plate 113 that slides on the inner side wall of the U-shaped frame 11, and a screw 114 that rotates on one side of the extrusion plate 113.

[0046] Furthermore, a limiting strip 112 is provided on one side of the C-shaped frame 111, and the limiting strip 112 slides in cooperation with a notch at one end of the extrusion plate 113.

[0047] Furthermore, the screw 114 passes through the grommets 111 along the axial direction of the handle 12 and is fixedly connected to one end of the handle 12, with the screw 114 threadedly engaging with the portion of the grommets 111 that passes through it.

[0048] By setting the limiting strip 112, the extrusion plate 113 can be limited to prevent the screw 114 from rotating and causing the extrusion plate 113 to rotate, thus ensuring the normal operation of the device. The entire fixing component 11 is made of conductive material.

[0049] Specifically, the fixing tube 13 is fitted around the outer ring of the grounding wire 14.

[0050] The fixed tube 13 is set parallel to the handle 12. This ensures that after the current transformer 21 is installed on the fixed tube 13, the central axis of the electromagnetic ring lock 22 can coincide with the central axis of the handle 12, thus ensuring the clamping and fixing effect of the lock tongue 221 on the handle 12.

[0051] Specifically, the handle 12 is made of insulating material, which can ensure personnel safety to a certain extent.

[0052] When using the equipment, first confirm that the power is off and connect one end of the grounding wire 14 to the grounding terminal or grounding stake. Then, the operator holds the handle 12 and aligns the U-shaped frame 111 with the equipment terminal or conductor that needs to be grounded, and places it in the space between the extrusion plate 113 and the U-shaped frame 111. Then, turn the handle 12. The rotation of the handle 12 will drive the screw 114 to rotate. At this time, since the screw 114 and the U-shaped frame 111 are threaded together, the handle 12 will move and push the extrusion plate 113 to move, clamping the equipment terminal or conductor. After the clamping is stable, maintenance operations can be performed.

[0053] In summary, during power outage maintenance, when power supply 24 is turned on, the normally closed contact of current relay 25 is in the normally closed state. Power supply 24, electromagnetic ring lock 22, current relay 25, and warning light 23 form a circuit, illuminating the warning light 23. The coil in electromagnetic ring lock 22 generates magnetic force, attracting the latch 221 and causing it to move inward. During this movement, the spring is compressed, preventing it from being attracted by electromagnetic ring lock 22. At this time, handle 12 can rotate normally. During equipment maintenance, grounding should be maintained; the grounding wire should be connected... One end of 14 is connected to a grounding terminal or grounding stake. Then, the operator holds the handle 12, aligns the 111 with the equipment terminal or conductor that needs to be grounded, and places it in the space between the extrusion plate 113 and the 111. Then, the operator rotates the handle 12. The rotation of the handle 12 will drive the screw 114 to rotate. At this time, since the screw 114 is threadedly engaged with the 111, it will drive the handle 12 to move and push the extrusion plate 113 to move, clamping the equipment terminal or conductor. After the clamping is stable, maintenance operations can be performed.

[0054] When the equipment is suddenly powered on or when an induced current occurs, the current will be transmitted to the ground through the grounding wire 14. When it passes through the current transformer 21, the primary side of the current transformer 21 will sense the current and transmit it to the secondary side, supplying power to the current relay 25. After receiving the current signal, the current relay 25 will open its normally closed contact. At this time, the warning light 23 will turn off, the electromagnetic ring lock 22 will lose its magnetic attraction, and the locking tongue 221 will be pushed out by the spring to clamp the handle 12. Since the surface of 221 in contact with the handle 12 is anti-slip, it can firmly hold the handle 12. At this time, the staff cannot operate the handle 12, which greatly ensures the safety of the staff.

[0055] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A clamping mechanism, characterized by: include, The clamping unit (2) includes a power supply (24), a current relay (25), a current transformer (21) fixedly sleeved on the outer ring of the fixed tube (13), an electromagnetic ring lock (22) fixed on one side of the handle (12), and a warning light (23) installed on the surface of the electromagnetic ring lock (22). The electromagnetic ring lock (22) has at least two locking tongues (221) distributed around its inner circumference, and the locking tongues (221) are connected to the inner ring of the electromagnetic ring lock (22) by an elastic element.

2. The clamping mechanism according to claim 1, characterized in that: The current transformer (21) is used to detect current, convert the large current on the primary side into a small current on the secondary side, and transmit the small current signal to the current relay (25) through wiring.

3. The clamping mechanism of claim 2, wherein: The current relay (25) is used to receive the current signal in the current transformer (21) and control the circuit connection and disconnection of the electromagnetic ring lock (22) and the warning light (23).

4. The clamping mechanism of claim 3, wherein: The two ends of the coil in the electromagnetic ring lock (22) are connected in series with the warning light (23), the normally closed contact of the current relay (25) and the power supply (24) to control the movement of the lock tongue (221).

5. A ground clamp, characterized by: Includes the clamping mechanism as described in any one of claims 1 to 4; and Grounding unit (1), the grounding unit (1) includes a fixing component (11), a handle (12) disposed on one side of the fixing component (11), a fixing tube (13) disposed on the fixing component (11) and parallel to the handle (12), and a grounding wire (14) electrically connected to the fixing component (11); The current transformer (21) is fitted around the outer ring of the fixed tube (13), and the electromagnetic ring lock (22) is fitted around the outer ring of the handle (12), with the central axis of the electromagnetic ring lock (22) coinciding with the central axis of the handle (12).

6. The ground strap of claim 5, wherein: The fixing component (11) includes a U-shaped frame (111), an extrusion plate (113) that slides on the inner wall of the U-shaped frame (111), and a screw (114) that rotates on one side of the extrusion plate (113).

7. The ground strap of claim 6, wherein: A limiting strip (112) is provided on one side of the shaped frame (111), and the limiting strip (112) slides in cooperation with a notch at one end of the extrusion plate (113).

8. The ground clamp of claim 7, wherein: The screw (114) passes through the grommets (111) along the axial direction of the handle (12) and is fixedly connected to one end of the handle (12). The screw (114) is threadedly engaged with the portion of the grommets (111) that passes through it.

9. The ground clamp of claim 5, wherein: The fixing tube (13) is sleeved on the outer ring of the grounding wire (14).

10. The ground clamp of claim 5, wherein: The handle (12) is made of insulating material.

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