Anti-loosening self-locking wire clamp
By designing anti-loosening self-locking wire clips, using the combined structure of U-shaped clamps and tongue pressing and fasteners to fix the cable wires, the problem of loose wire clips is solved, the stability and safety of wire connections are achieved, and maintenance costs and power losses are reduced.
Patent Information
- Application Number
- CN202411621253.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-03-11
AI Technical Summary
Existing wire clips are prone to loosening during use, resulting in poor contact and safety hazards, and have high maintenance costs.
An anti-loosening self-locking wire clip is designed, using a combined structure of U-shaped pliers and tongue pressing. The cable conductor is fixed between the upper and lower junctions through fasteners, and the elastic force of the conductor increases the friction coefficient, ensures the stability of the connection, and further enhances the insulation and positioning effect through the insulating cover and positioning components.
Effectively prevent the wire clamp from loosening, ensure the stability and safety of wire connections, reduce maintenance costs and power losses, and improve the operating stability, economy and safety of the line.
Smart Images
Figure CN119601993A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of wire clamps, and in particular relates to an anti-loosening self-locking wire clamp. Background Art
[0002] In recent years, there have been many cases in China where conductor oxidation, electrochemical corrosion, and increased resistance at various wire clamp connections of wires have caused faults or fires, bringing great losses to the power supply system.
[0003] The parallel groove clamp has a large contact surface and good current carrying capacity. However, the parallel groove clamp does not have self-locking and elastic compression functions. The screws will loosen after a few years of use, and it takes two power outages to tighten them to meet the safe operation requirements of the line. The subsequent maintenance is troublesome and costly. The parallel groove clamp does not have a matching insulation cover, and insulation is achieved by winding with insulating tape and other materials. The tape is prone to aging and falling off, causing safety hazards such as electric shock and phase short circuit.
[0004] The C-type wire clamp has good current carrying capacity, but has strict requirements on the outer diameter of the wire and is difficult to select. If the outer diameter of the wire is too large, the wire clamp and the wire cannot be flattened and self-locking cannot be achieved; if the outer diameter of the wire is too small, the wire cannot be compressed, and the wire clamp is prone to loosening and poor contact during use.
[0005] Although parallel groove crimping, L-type crimping and T-type crimping are used in the drainage lines of the 10KV lines, 35KV and 10KV busbars of the substation to reduce the failure of loose joints and heat, one-time crimping cannot be maintained later, such as 10KV line T-connection, new distribution transformer user lines, replacement of knife switches and switch equipment wire clamps in substations, and upgrades of new knife switches. If the drainage line is not long enough, the original drainage line must be destroyed or extended, resulting in extended maintenance and power outage time of the substation.
[0006] Therefore, we propose an anti-loosening self-locking wire clamp to solve the above problems. Summary of the invention
[0007] In view of the problems that still exist in various types of wire clamps during use, the present invention provides an anti-loosening self-locking wire clamp.
[0008] The solution adopted by the present invention to solve the technical problem is: an anti-loosening self-locking wire clamp, comprising a U-shaped clamp, a pressing tongue and N sets of fasteners, wherein the inner top of the U-shaped clamp is provided with an upper bite portion, the top of the pressing tongue is provided with a lower bite portion, and the pressing tongue can slide along the inner cavity of the U-shaped clamp; The U-shaped clamp and the pressing tongue are detachably connected via a fastener, and the cable conductor is bitten and fixed between the upper biting part and the lower biting part.
[0009] Preferably, the left side wall and the right side wall of the U-shaped clamp are respectively provided with N through holes.
[0010] Preferably, the fastener is a U-shaped screw sleeved on the outside of the tongue-pressing member, and the two upper ends of the U-shaped screw respectively pass through the left and right through holes and are respectively threadedly connected with the two nuts.
[0011] Preferably, a plurality of slide grooves are respectively provided on the left side and the right side of the inner wall of the U-shaped pliers, and a plurality of limit strips are respectively provided on the left side and the right side of the tongue pressing member, and the limit strips can slide up and down along the slide grooves.
[0012] Preferably, positioning grooves are respectively formed at two upper ends of the U-shaped screw.
[0013] Preferably, it also includes a shell and N groups of positioning components, the shell is fixedly connected to the top of the U-shaped clamp, a partition is arranged inside the shell, and N slots are respectively opened on the left and right sides of the shell; the N groups of positioning components are respectively arranged corresponding to the N U-shaped screws, and the positioning components include two conical positioning pieces, and the two conical positioning pieces are respectively arranged in the slots on the left and right sides, and a spring is installed between the conical positioning piece and the partition, and under the elastic force of the spring, the conical end of the conical positioning piece extends out of the slot and is inserted into the corresponding positioning groove.
[0014] Preferably, two insulating covers are also included, and a accommodating chamber for accommodating U-shaped clamps or tongue depressors is provided inside the insulating cover, and semicircular holes for cables to pass through are respectively opened at the front and rear ends. Connecting parts are respectively provided on the left and right sides of the insulating cover, and the upper and lower connecting parts are connected by bolts to connect the upper and lower insulating covers.
[0015] Preferably, a rubber pad is provided at the butt end of the insulating cover, and an arc-shaped rubber sheet is provided in the semicircular hole.
[0016] Preferably, a thermal expansion metal pad is provided between the nut and the U-shaped clamp.
[0017] Preferably, a probe compartment for accommodating a temperature probe is provided in the depressor tongue, a hollow screw is provided at one end of the probe compartment, and a waterproof cap is mounted on the nut of the hollow screw.
[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention connects and fixes the U-shaped clamp and the tongue presser by means of a U-shaped screw and a nut, and fixes the cable conductor between the upper bite part and the lower bite part, forcibly deforms the curved surface of the cable conductor, and utilizes the elastic force of the cable conductor itself to further increase the friction coefficient between the cable conductor and the upper bite part and the lower bite part, so that the conductor cannot loosen or fall off, thereby ensuring the stability of the connection between the wire clamp and the cable conductor.
[0019] 2. The present invention provides a conical positioning piece. Under the elastic force of the spring, the conical end of the conical positioning piece extends out of the notch and is inserted into the corresponding positioning groove, so as to further position the U-shaped screw to prevent the U-shaped screw from displacement and loosening, thereby ensuring the stability of the connection between the U-shaped clamp and the tongue depressor.
[0020] 3. The present invention arranges two insulating covers on the outside of the U-shaped clamp and the tongue, and uses bolts to connect and fix them. The two insulating covers play an insulating role in the joints in the overhead line, preventing short circuits and leakage caused by external factors, such as branches, kites, and debris, reducing power loss caused by leakage, and improving the stability, economy, and safety of line operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the U-shaped forceps and the tongue depressor of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the U-shaped pliers and the tongue depressor of the present invention; Figure 4 It is a schematic diagram of the front view structure of the U-shaped forceps and tongue depressor of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle; Figure 6 It is a schematic diagram of the cross-sectional structure of the tongue depressor of the present invention from the right side.
[0022] In the figure: 1 U-shaped pliers, 11 upper bite part, 21 tongue depressor, 22 lower bite part, 23 limit strip, 31 U-shaped screw, 32 nut, 4 shell, 41 partition, 51 conical positioning piece, 52 spring, 6 insulating cover, 61 connecting part, 71 probe compartment, 72 hollow screw, 73 waterproof cap. DETAILED DESCRIPTION
[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0024] See also Figure 1-6 , the present invention provides a technical solution for an anti-loosening self-locking wire clamp: Embodiment 1: according to Figure 1-3 As shown, it includes a U-shaped clamp 1, a pressing tongue 21 and N groups of fasteners. The inner top of the U-shaped clamp 1 is provided with an upper bite portion 11, and the top of the pressing tongue 21 is provided with a lower bite portion 22. By providing the upper bite portion 11 and the lower bite portion 22, the roughness of the contact surface with the cable conductor is increased, the friction coefficient is increased, and the pressing tongue 21 can slide along the inner cavity of the U-shaped clamp 1.
[0025] The left and right walls of the U-shaped clamp 1 are respectively provided with N through holes, and the fastener is a U-shaped screw 31 sleeved on the outside of the pressing tongue 21. The two upper ends of the U-shaped screw 31 are respectively passed through the left and right through holes and are respectively threadedly connected with two nuts 32, so that the cable conductor is bite-fixed between the upper bite part 11 and the lower bite part 22, forcibly deforming the curved surface of the cable conductor, and utilizing the elastic force of the cable conductor itself to further increase the friction coefficient between the cable conductor and the upper bite part 11 and the lower bite part 22, so that the conductor cannot loosen or fall off, thereby ensuring the stability of the connection between the wire clamp and the cable conductor.
[0026] A heat-expandable metal pad is provided between the nut 32 and the U-shaped clamp 1 to prevent the nut 32 from loosening, provide additional pre-tightening force, and maintain the tightness of the connection.
[0027] Embodiment 2: On the basis of the first embodiment, Figure 1 and Figure 2 As shown, a plurality of slide grooves are respectively provided on the left side and the right side of the inner wall of the U-shaped pliers 1, and a plurality of limit strips 23 are respectively provided on the left side and the right side of the pressing tongue 21. The limit strips 23 can slide up and down along the slide grooves. By setting the limit strips 23 and the slide grooves, the pressing tongue 21 can be effectively prevented from moving forward and backward.
[0028] Embodiment three: On the basis of the first embodiment, Figure 1 , Figure 4 and Figure 5 As shown, two upper ends of the U-shaped screw 31 are respectively provided with positioning grooves.
[0029] It also includes a shell 4 and N groups of positioning components. The shell 4 is fixedly connected to the top of the U-shaped clamp 1. A partition 41 is arranged inside the shell 4, and N notches are respectively opened on the left and right sides of the partition 41.
[0030] N groups of positioning components are respectively arranged corresponding to N U-shaped screws 31, and the positioning components include two conical positioning pieces 51, and the two conical positioning pieces 51 are respectively arranged in the slots on the left and right sides, and a spring 52 is installed between the conical positioning piece 51 and the partition 41. Under the elastic force of the spring 52, the conical end of the conical positioning piece 51 extends out of the slot and is inserted into the corresponding positioning groove, so as to further position the U-shaped screw 31 to prevent the U-shaped screw 31 from displacement and loosening, thereby ensuring the stability of the connection between the U-shaped clamp 1 and the tongue depressor 21.
[0031] Embodiment 4: On the basis of the first embodiment, Figure 1 As shown, two insulating covers 6 are also included. A accommodating chamber for accommodating the U-shaped clamp 1 or the tongue depressor 21 is arranged inside the insulating cover 6. Semicircular holes for the cable to pass through are respectively opened at the front and rear ends thereof. Connecting parts 61 are respectively arranged on the left and right sides of the insulating cover 6.
[0032] Two insulating covers 6 are arranged on the outside of the U-shaped clamp 1 and the pressing tongue 21, the upper and lower connecting parts 61 are connected by bolts, and the upper and lower insulating covers 6 are butt-jointed. The two insulating covers 6 play the role of insulation of the joints in the overhead line to prevent short circuit and leakage caused by external factors, such as branches, kites, and debris, etc., reduce the power loss caused by leakage, and improve the stability, economy, and safety of line operation.
[0033] A rubber pad is provided at the butt joint end of the insulating cover 6, and an arc-shaped rubber sheet is provided in the semicircular hole. By providing the rubber pad and the arc-shaped rubber sheet, the sealing performance of the two insulating covers 6 after butt joint can be increased.
[0034] Embodiment five: On the basis of the first embodiment, Figure 6 As shown, a probe compartment 71 for accommodating a temperature probe is provided in the pressing tongue 21, a hollow screw 72 is provided at one end of the probe compartment 71, and a waterproof cap 73 is mounted on the nut of the hollow screw 72. By inserting the temperature probe into the probe compartment 71, the temperature changes of the wire clamp and the wire it clamps can be monitored to ensure the safe operation of the power system.
Claims
1. An anti-loosening self-locking wire clamp, comprising a U-shaped clamp, a tongue presser and N sets of fasteners, characterized in that: The inner top of the U-shaped clamp is provided with an upper bite portion, and the top of the tongue pressing device is provided with a lower bite portion, and the tongue pressing device can slide along the inner cavity of the U-shaped clamp; The U-shaped clamp and the pressing tongue are detachably connected via a fastener, and the cable conductor is bitten and fixed between the upper biting part and the lower biting part.
2. The anti-loosening self-locking wire clamp according to claim 1, characterized in that: The left side wall and the right side wall of the U-shaped clamp are respectively provided with N through holes.
3. The anti-loosening self-locking wire clamp according to claim 2, characterized in that: The fastener is a U-shaped screw sleeved on the outer side of the pressing tongue, and the two upper ends of the U-shaped screw respectively pass through the left and right through holes and are respectively threadedly connected with the two nuts.
4. The anti-loosening self-locking wire clamp according to claim 1 or 3, characterized in that: The left side and the right side of the inner wall of the U-shaped clamp are respectively provided with a plurality of slide grooves, and the left side and the right side of the tongue pressing member are respectively provided with a plurality of limit strips, and the limit strips can slide up and down along the slide grooves.
5. The anti-loosening self-locking wire clamp according to claim 3, characterized in that: Positioning grooves are respectively formed at the two upper ends of the U-shaped screw.
6. The anti-loosening self-locking wire clamp according to claim 5, characterized in that: It also includes a shell and N groups of positioning components. The shell is fixedly connected to the top of the U-shaped clamp. A partition is arranged inside the shell, and N slots are respectively opened on the left and right sides of the shell. The N groups of positioning components are respectively arranged corresponding to the N U-shaped screws. The positioning components include two conical positioning pieces, and the two conical positioning pieces are respectively arranged in the slots on the left and right sides. A spring is installed between the conical positioning piece and the partition. Under the elastic force of the spring, the conical end of the conical positioning piece extends out of the slot and is inserted into the corresponding positioning groove.
7. The anti-loosening self-locking wire clamp according to claim 1 or 6, characterized in that: It also includes two insulating covers, which are provided with a accommodating chamber for accommodating U-shaped clamps or tongue depressors, and semicircular holes for cables to pass through are respectively opened at the front and rear ends. Connecting parts are respectively provided on the left and right sides of the insulating cover, and the upper and lower connecting parts are connected by bolts to connect the upper and lower insulating covers.
8. The anti-loosening self-locking wire clamp according to claim 7, characterized in that: A rubber pad is arranged at the butt end of the insulating cover, and an arc-shaped rubber sheet is arranged in the semicircular hole.
9. The anti-loosening self-locking wire clamp according to claim 3, characterized in that: A heat expansion metal pad is arranged between the nut and the U-shaped clamp.
10. The anti-loosening self-locking wire clamp according to claim 1, characterized in that: A probe chamber for accommodating a temperature probe is provided in the depressor tongue, a hollow screw is provided at one end of the probe chamber, and a waterproof cap is mounted on the nut of the hollow screw.