Power wire clamp for connecting different-diameter cables

Abstract

The invention belongs to the technical field of power line clamps, and particularly relates to a power line clamp for different-diameter cable connection, which comprises a base, the top of the base is provided with an upper pressing plate, a cable head is clamped between the base and the upper pressing plate, the top of the base is provided with an arc-shaped groove I, and the arc-shaped groove I is used for placing the cable head. An arc-shaped groove II is formed in the bottom of the upper pressing plate; according to the device, the inner wall of the upper pressing plate is elastically connected with the material abutting roller through the supporting spring, and the material abutting roller can slide along the sliding rod. When the upper pressing plate moves downwards to clamp a cable head, the material abutting roller bears the counter-acting force of the cable head, the supporting spring is compressed to generate elastic deformation, and the position of the material abutting roller can be automatically adjusted according to the shape and the size of the cable head. The elastic limiting structure not only can effectively prevent the cable head from shifting in the clamping process and ensure the stability of cable connection, but also can prevent the cable head from being damaged due to overlarge clamping force, prolongs the service life of the cable, and improves the reliability of power transmission.

Description

Technical Field

[0001] This invention relates to the field of power line clamp technology, and more particularly to a power line clamp for connecting cables of different diameters. Background Technology

[0002] Traditional power clamps for cables of varying diameters typically employ a rigid fixing method when holding the cable ends. This method lacks adaptability to cable ends of different shapes and sizes. When encountering irregularly shaped cables or cables with significantly different diameters, it is difficult to ensure the positional stability of the cable end during clamping. During power transmission, cables may experience slight displacement due to external vibrations, temperature changes, and other factors. Rigid clamps cannot effectively buffer this displacement, easily leading to loose cable connections, poor contact, increased resistance, and other problems. This severely affects the quality and stability of power transmission and may even cause localized overheating, resulting in safety accidents.

[0003] At cable connection points, dust and debris easily accumulate due to prolonged exposure to air. This dust and debris adheres to the cable tray within the power clamp, affecting the proper contact between the cable head and the tray, increasing contact resistance, and reducing power transmission efficiency. However, most existing power clamps for reducing cable diameters lack effective cleaning and maintenance devices, requiring regular manual cleaning. Manual cleaning is not only inefficient but also difficult to thoroughly clean hidden areas, especially at cable connection points in high-altitude or complex environments. Manual cleaning poses significant safety risks, making effective cleaning and maintenance difficult and impacting the long-term reliability of the cable connection.

[0004] Ensuring the safety of operators and equipment is paramount during power transmission. Some existing power clamps for connecting cables of different diameters have safety hazards due to their material selection or structural design. Some clamp components use materials with good conductivity but poor insulation. Over long-term use, environmental factors such as humidity and corrosion can easily lead to a decline in insulation performance, causing current leakage and increasing the risk of electric shock to operators. Furthermore, the lack of effective limiting devices when connecting cables of different diameters can cause cable joints to come into contact, resulting in short circuits. This can damage electrical equipment and potentially cause serious safety accidents such as fires, threatening the safe and stable operation of the power system. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a power clamp for connecting cables of different diameters, thereby more precisely resolving the issues raised in the background section.

[0006] This invention is achieved through the following technical solution: This invention proposes a power clamp for connecting cables of different diameters, comprising a base, an upper pressure plate on the top of the base, and a cable head clamped between the base and the upper pressure plate; an arc-shaped groove 1 is formed on the top of the base for placing the cable head; an arc-shaped groove 2 is formed on the bottom of the upper pressure plate, and a material-receiving roller elastically connected to the inner wall of the arc-shaped groove 2 is provided inside the arc-shaped groove 2, the material-receiving roller being used to elastically limit the cable head when the upper pressure plate moves downward to clamp the cable head between the arc-shaped groove 1 and the arc-shaped groove 2; a limiting frame is installed on the top of the base, and a locking part is installed on the top of the limiting frame, the locking part being used to adjust the position of the upper pressure plate; a cavity is formed inside the base, and a cleaning part is provided in the cavity, the cleaning part being used to blow air to one part of the arc-shaped groove for cleaning the arc-shaped groove.

[0007] Preferably, the locking part includes a threaded ring installed on the top of the limiting frame, a screw threadedly connected to the inner wall of the threaded ring, the end of the screw extending to the bottom of the limiting frame, and the bottom of the screw connected to the upper pressure plate via a bearing for adjusting the height of the upper pressure plate.

[0008] Preferably, a support spring is installed on the inner wall of the upper pressure plate, and the end of the support spring is connected to the abutment roller for elastic support of the abutment roller.

[0009] Preferably, a slide bar is installed on the inner wall of the upper pressure plate, the material abutting roller is connected through the slide bar, and the support spring is sleeved on the surface of the slide bar to limit the movement of the material abutting roller.

[0010] Preferably, the cleaning unit includes a piston cylinder installed on the top wall of the cavity, and a piston rod extending through the piston cylinder is installed at the bottom of the piston cylinder. The piston rod is U-shaped and extends through the outside of the base. The piston rod is used to draw air into the piston cylinder after the upper pressure plate moves downward and to squeeze and eject air from the piston cylinder after the upper pressure plate returns to its original position.

[0011] Preferably, the piston cylinder is equipped with an air outlet pipe and a diverter pipe on its surface. The air outlet pipe is used to discharge air from inside the piston cylinder. A diverter pipe is installed at the end of the air outlet pipe and is connected to the inner wall of the base. An inclined jet nozzle is installed at the top of the diverter pipe and penetrates to a part of the arc-shaped groove, fitting against the inner wall of the arc-shaped groove, for spraying air. The diverter pipe penetrates to the outside of the base and is used to transport outside air into the piston cylinder. An air inlet pipe is installed on the surface of the piston cylinder for introducing outside air into the piston cylinder.

[0012] Preferably, a connecting plate 1 is installed on both sides of the top of the base, the connecting plate 1 is used for installing the piston rod, and a connecting plate 2 is installed on both sides of the bottom of the upper pressure plate, the bottom of the connecting plate 2 is installed with a pressure block, the pressure block is in contact with the top of the connecting plate 1, and is used to apply pressure to the piston rod.

[0013] Preferably, a sealing seat is installed at the end of the piston rod, the sealing seat is in close contact with the inner wall of the piston cylinder, and is used to extract air from the inner wall of the piston cylinder. A return spring is installed between the sealing seat and the inner wall of the piston cylinder, and the return spring is used to reset the sealing seat.

[0014] Preferably, a second check valve is installed on the surface of the air inlet pipe, and a first check valve is installed on the surface of the air outlet pipe. The first check valve and the second check valve are used to allow one-way airflow at the air outlet pipe and the air inlet pipe, respectively.

[0015] Preferably, a limiting piece is provided at the top of the base between the two arc-shaped grooves. The limiting piece is used to separate the two cable joints. The base, the upper pressure plate, and the abutment roller are all made of insulating rubber.

[0016] Compared with the prior art, the present invention provides a power clamp for connecting cables of different diameters, which has the following advantages: This power clamp for connecting cables of different diameters features an upper pressure plate with an inner wall that is elastically connected to a support roller via a support spring. The support roller can slide along a sliding rod. When the upper pressure plate moves downwards to clamp the cable head, the support roller is subjected to the reaction force from the cable head, causing the support spring to compress and elastically deform. This allows the support roller to automatically adjust its position according to the shape and size of the cable head. This elastic limiting structure not only effectively prevents the cable head from shifting during clamping, ensuring the stability of the cable connection, but also avoids damage to the cable head due to excessive clamping force, extending the cable's service life and improving the reliability of power transmission.

[0017] This power clamp for connecting cables of different diameters features a cleaning section that is cleverly linked to the movement of the upper pressure plate. The pressure blocks on both sides of the bottom of the upper pressure plate engage with the connecting plates on both sides of the top of the base. When the upper pressure plate moves downwards, the pressure blocks press against the connecting plates, causing the piston rod to move upwards and draw air into the piston cylinder. When the upper pressure plate returns to its original position, the piston rod moves downwards under the action of the return spring, forcing the air out of the piston cylinder. The air is then ejected from the inclined jet nozzle through the air outlet and diversion pipe, thoroughly cleaning the arc-shaped groove. This design requires no additional power source; automatic cleaning is achieved through the normal operation of the upper pressure plate, effectively removing dust and debris from the arc-shaped groove, ensuring good contact between the cable head and the arc-shaped groove, and further improving the stability of power transmission.

[0018] This power clamp for connecting cables of different diameters features an insulated rubber base, upper pressure plate, and abutment roller, providing excellent insulation to effectively prevent current leakage, avoid electric shock to operators, and ensure safe operation. Simultaneously, a limiting piece positioned between two arc-shaped grooves on the top of the base separates the two cable joints during connection, preventing them from contacting each other and short-circuiting, further enhancing the safety of power transmission. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a power clamp for connecting cables of different diameters proposed in this invention; Figure 2 This is a side view of the structure of a power clamp for connecting cables of different diameters proposed in this invention; Figure 3 This is a front view of the structure of a power clamp for connecting cables of different diameters proposed in this invention; Figure 4 This is a schematic diagram of the upper pressure plate of a power line clamp for connecting cables of different diameters, as proposed in this invention. Figure 5 This is a schematic diagram of the structure of the base of a power clamp for connecting cables of different diameters proposed in this invention, after being cut open. Figure 6 This is a front sectional view of the structure of a power clamp for connecting cables of different diameters proposed in this invention; Figure 7 This invention proposes a power clamp for connecting cables of different diameters. Figure 6 Enlarged schematic diagram of region A in the middle.

[0020] In the diagram: 1. Base; 11. Arc-shaped groove one; 12. Connecting plate one; 13. Cavity; 14. Limiting plate; 2. Upper pressure plate; 21. Arc-shaped groove two; 22. Connecting plate two; 23. Pressure block; 3. Limiting frame; 4. Locking part; 41. Threaded ring; 42. Screw; 5. Material abutment roller; 51. Support spring; 52. Slide rod; 6. Cleaning part; 61. Piston cylinder; 62. Piston rod; 621. Sealing seat; 63. Air outlet pipe; 64. Diverter pipe; 65. Jet nozzle; 66. Air inlet pipe; 67. Check valve one; 68. Check valve two; 69. Return spring. Detailed Implementation

[0021] To more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0022] Example

[0023] like Figures 1-7As shown, an embodiment of the present invention provides a power clamp for connecting cables of different diameters, comprising a base 1 made of insulating rubber. An upper pressure plate 2, also made of insulating rubber, is provided on the top of the base 1. The cable head is clamped between the base 1 and the upper pressure plate 2. An arc-shaped groove 11 is provided on the top of the base 1 for placing the cable head. In actual operation, the cable head of the cable of different diameter is placed in the arc-shaped groove 11. An arc-shaped groove 21 is provided on the bottom of the upper pressure plate 2. A retaining roller 5, made of insulating rubber, is provided within the arc-shaped groove 21 and elastically connected to its inner wall. When the upper pressure plate 2 moves downwards to clamp the cable head between the arc-shaped groove 11 and the arc-shaped groove 21, the retaining roller 5, due to its elastic connection, provides elastic restraint to the cable head, ensuring the cable head remains stable during clamping and does not easily shift, thus guaranteeing the reliability of the cable connection. A limit frame 3, made of metal, is installed on the top of the base 1, serving as a support and limiting element. A locking part 4 is installed on the top of the limit frame 3, used to adjust the position of the upper pressure plate 2 to allow for appropriate clamping according to different cable head specifications. The base 1 has an internal cavity 13 with a cleaning part 6. The cleaning part 6 blows air to the arc-shaped groove 11, allowing dust and debris to be cleaned from the arc-shaped groove 11 after a period of use, maintaining its cleanliness and ensuring good contact between the cable head and the arc-shaped groove 11, thus improving the stability of power transmission.

[0024] In this invention, the locking part 4 includes a threaded ring 41 installed on the top of the limiting frame 3. The threaded ring 41 is made of metal and is fixedly connected to the limiting frame 3 by welding. A screw 42 is threadedly connected to the inner wall of the threaded ring 41. The screw 42 is made of metal and has precise threads on its surface. The end of the screw 42 extends to the bottom of the limiting frame 3, and the bottom of the screw 42 is connected to the upper pressure plate 2 through a bearing. In actual operation, when it is necessary to adjust the height of the upper pressure plate 2, the screw 42 is rotated. Due to the threaded connection between the screw 42 and the threaded ring 41, the screw 42 will move up and down within the threaded ring 41, thereby driving the upper pressure plate 2 to move up and down, thus realizing the adjustment of the height of the upper pressure plate 2 to meet the clamping requirements of different specifications of cable heads and ensure that the cable connection is firm.

[0025] In this invention, a support spring 51 is installed on the inner wall of the upper pressure plate 2. The support spring 51 is made of metal and has good elasticity and durability. The end of the support spring 51 is connected to the abutment roller 5. When the upper pressure plate 2 moves downward to clamp the cable head, the abutment roller 5 is subjected to the reaction force of the cable head, and the support spring 51 is compressed, producing elastic deformation, thereby providing elastic support for the abutment roller 5. This allows the abutment roller 5 to automatically adjust its position according to the shape and size of the cable head, effectively elastically limiting the cable head, preventing damage to the cable head during clamping, and ensuring clamping stability.

[0026] In this invention, a sliding rod 52 is installed on the inner wall of the upper pressure plate 2. The sliding rod 52 is made of metal and has a smooth surface. The abutment roller 5 is connected to the sliding rod 52, allowing the abutment roller 5 to slide along the sliding rod 52. A support spring 51 is sleeved on the surface of the sliding rod 52. When the abutment roller 5 is subjected to external force, it will move along the sliding rod 52. At the same time, the support spring 51 is compressed or stretched. The sliding rod 52 plays a limiting role in the movement of the abutment roller 5, preventing it from deviating during movement. This ensures that the abutment roller 5 can accurately and elastically limit the cable head, improving the working stability and reliability of the power clamp.

[0027] In this invention, the cleaning unit 6 includes a piston cylinder 61 installed on the top wall of the cavity 13. The piston cylinder 61 is made of metal and has a certain strength and sealing performance. A piston rod 62, U-shaped and extending to the outside of the base 1, is installed at the bottom of the piston cylinder 61. When the upper pressure plate 2 moves downward, it drives related components to squeeze the piston rod 62, causing the piston rod 62 to move upward and draw air into the piston cylinder 61. When the upper pressure plate 2 returns to its original position, the piston rod 62 moves downward under the action of the return spring 69, etc., squeezing and ejecting air from the piston cylinder 61. Through this reciprocating motion, the extraction and ejection of air are realized, providing a power source for cleaning the arc-shaped groove 11.

[0028] In this invention, an air outlet pipe 63 and a diverter pipe 64 are installed on the surface of the piston cylinder 61, both of which are made of metal. The air outlet pipe 63 is used to exhaust air from the piston cylinder 61, and the diverter pipe 64 is installed at the end of the air outlet pipe 63, connecting to the inner wall of the base 1. An inclined jet nozzle 65 is installed at the top of the diverter pipe 64, penetrating to the arc-shaped groove 11 and fitting against the inner wall of the arc-shaped groove 11. When the air in the piston cylinder 61 is squeezed out, the air passes through the air outlet pipe 63 and the diverter pipe 64 and finally exits from the jet nozzle 65. Because the jet nozzle 65 is inclined and fits against the inner wall of the arc-shaped groove 11, it can effectively blow air to all corners of the arc-shaped groove 11, thoroughly cleaning the arc-shaped groove 11 and removing dust and debris.

[0029] In this invention, connecting plates 12, made of metal, are installed on both sides of the top of the base 1 for mounting and supporting the piston rod 62. Connecting plates 22, also made of metal, are installed on both sides of the bottom of the upper pressure plate 2. A pressure block 23, also made of metal, is installed at the bottom of the connecting plate 22. When the upper pressure plate 2 moves downward, the pressure block 23 contacts the top of the connecting plate 12 and applies pressure to it, which is then transmitted to the piston rod 62, causing it to move upward and extract air. This structural design cleverly utilizes the movement of the upper pressure plate 2 to drive the cleaning unit 6, eliminating the need for an additional power source, simplifying the structure, and reducing costs.

[0030] In this invention, a sealing seat 621 is installed at the end of the piston rod 62. The sealing seat 621 is made of rubber and fits tightly against the inner wall of the piston cylinder 61, ensuring that a relatively sealed space can be formed inside the piston cylinder 61 during the movement of the piston rod 62, so as to effectively extract and compress air. A return spring 69 is installed between the sealing seat 621 and the inner wall of the piston cylinder 61. The return spring 69 is made of metal. When the piston rod 62 moves upward to extract air, the return spring 69 is compressed. When it is necessary to compress air to eject it, the return spring 69 releases its elastic potential energy, pushing the sealing seat 621 and the piston rod 62 downward to compress and eject air from the piston cylinder 61, realizing the automatic reset function and ensuring that the cleaning unit 6 can continue to work normally.

[0031] In this invention, a second check valve 68 is installed on the surface of the air inlet pipe 66, and a first check valve 67 is installed on the surface of the air outlet pipe 63. Both the first check valve 67 and the second check valve 68 are made of metal and have a one-way flow function. The first check valve 67 ensures that air at the air outlet pipe 63 can only be ejected from inside the piston cylinder 61, preventing outside air from flowing back into the piston cylinder 61. The second check valve 68 ensures that air at the air inlet pipe 66 can only enter the piston cylinder 61 from the outside, preventing air in the piston cylinder 61 from flowing back into the outside. By setting the first check valve 67 and the second check valve 68, one-way air flow between the piston cylinder 61, the air outlet pipe 63, and the air inlet pipe 66 is ensured, enabling the cleaning unit 6 to work normally according to design requirements and improving the cleaning effect.

[0032] In this invention, a limiting piece 14 is provided on the top of the base 1 between two arc-shaped grooves 11. The limiting piece 14 is made of insulating rubber. When connecting cables of different diameters, the two cable joints are placed in the two arc-shaped grooves 11 respectively. The limiting piece 14 can separate the two cable joints, preventing them from contacting each other and short-circuiting, thus ensuring the safety of power transmission. The base 1, the upper pressure plate 2, and the abutment roller 5 are all made of insulating rubber. Insulating rubber has good insulation properties, which can effectively prevent current leakage and avoid electric shock accidents. At the same time, it can also play a certain role in buffering and protection, reducing the damage to the cable head during clamping, and improving the safety and reliability of the power clamp.

[0033] Finally, it should be noted that the basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification, and therefore remain within the spirit and scope of the exemplary embodiments of this specification. Furthermore, this specification uses specific terms to describe embodiments of this specification. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined. Moreover, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods of this specification.

[0034] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power clamp for connecting cables of different diameters, comprising a base (1), characterized in that, The base (1) has an upper pressure plate (2) on its top, and the cable head is clamped between the base (1) and the upper pressure plate (2). The top of the base (1) has an arc-shaped groove (11) for placing the cable head. The bottom of the upper pressure plate (2) has an arc-shaped groove (21) and a material-holding roller (5) elastically connected to the inner wall of the arc-shaped groove (21) is provided inside the arc-shaped groove (21). The material-holding roller (5) is used to clamp the cable head in the arc-shaped groove as the upper pressure plate (2) moves downward. When the cable head is between the first groove (11) and the second arc groove (21), the cable head is elastically limited; a limit frame (3) is installed on the top of the base (1), and a locking part (4) is installed on the top of the limit frame (3). The locking part (4) is used to adjust the position of the upper pressure plate (2); a cavity (13) is opened inside the base (1), and a cleaning part (6) is provided in the cavity (13). The cleaning part (6) is used to blow air to the first arc groove (11) for cleaning the first arc groove (11).

2. A power clamp for connecting cables of different diameters according to claim 1, characterized in that, The locking part (4) includes a threaded ring (41) installed on the top of the limiting frame (3). A screw (42) is threadedly connected to the inner wall of the threaded ring (41). The end of the screw (42) extends to the bottom of the limiting frame (3). The bottom of the screw (42) is connected to the upper pressure plate (2) through a bearing for adjusting the height of the upper pressure plate (2).

3. A power clamp for connecting cables of different diameters according to claim 1, characterized in that, A support spring (51) is installed on the inner wall of the upper pressure plate (2). The end of the support spring (51) is connected to the abutment roller (5) for elastic support of the abutment roller (5).

4. A power clamp for connecting cables of different diameters according to claim 3, characterized in that, A slide rod (52) is installed on the inner wall of the upper pressure plate (2). The material abutting roller (5) is connected to the slide rod (52) through the slide rod. The support spring (51) is sleeved on the surface of the slide rod (52) to limit the position of the material abutting roller (5).

5. A power clamp for connecting cables of different diameters according to claim 1, characterized in that, The cleaning unit (6) includes a piston cylinder (61) installed on the top wall of the cavity (13). A piston rod (62) is installed at the bottom of the piston cylinder (61) and extends into the piston cylinder (61). The piston rod (62) is U-shaped and extends to the outside of the base (1). The piston rod (62) is used to draw air into the piston cylinder (61) after the upper pressure plate (2) moves downward and to squeeze and eject air from the piston cylinder (61) after the upper pressure plate (2) returns to its original position.

6. A power clamp for connecting cables of different diameters according to claim 5, characterized in that, The piston cylinder (61) is equipped with an air outlet pipe (63) and a diverter pipe (64). The air outlet pipe (63) is used to discharge air from the piston cylinder (61). The end of the air outlet pipe (63) is equipped with a diverter pipe (64). The diverter pipe (64) is connected to the inner wall of the base (1). The top of the diverter pipe (64) is equipped with an inclined jet head (65). The jet head (65) extends through the arc groove (11) and fits against the inner wall of the arc groove (11) for spraying air. The diverter pipe (64) extends through the outside of the base (1) for delivering outside air into the piston cylinder (61). The surface of the piston cylinder (61) is equipped with an air inlet pipe (66) for introducing outside air into the piston cylinder (61).

7. A power clamp for connecting cables of different diameters according to claim 6, characterized in that, The base (1) has connecting plates 1 (12) installed on both sides of the top. The connecting plates 1 (12) are used to install the piston rod (62). The upper pressure plate (2) has connecting plates 2 (22) installed on both sides of the bottom. The connecting plates 2 (22) have pressure blocks (23) installed at the bottom. The pressure blocks (23) are in contact with the top of the connecting plates 1 (12) and are used to apply pressure to the piston rod (62).

8. A power clamp for connecting cables of different diameters according to claim 6, characterized in that, A sealing seat (621) is installed at the end of the piston rod (62). The sealing seat (621) is in close contact with the inner wall of the piston cylinder (61) and is used to extract air from the inner wall of the piston cylinder (61). A return spring (69) is installed between the sealing seat (621) and the inner wall of the piston cylinder (61) and is used to reset the sealing seat (621).

9. A power clamp for connecting cables of different diameters according to claim 6, characterized in that, Check valve 2 (68) is installed on the surface of the air inlet pipe (66), and check valve 1 (67) is installed on the surface of the air outlet pipe (63). Check valve 1 (67) and check valve 2 (68) are used for unidirectional air flow at the air outlet pipe (63) and air inlet pipe (66), respectively.

10. A power clamp for connecting cables of different diameters according to claim 1, characterized in that, The top of the base (1) is provided with a limiting piece (14) between two arc-shaped grooves (11). The limiting piece (14) is used to separate the two cable joints. The base (1), the upper pressure plate (2) and the abutting roller (5) are all made of insulating rubber.

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