A 10 kV power distribution line combiner

Abstract

The application relates to the technical field of power distribution line construction, and discloses a 10kV power distribution line parallel line device, which comprises a base, the upper side of the base is provided with a pressing block, a support, a main body is fixed to the base through a vertical rod, one side of the support is provided with a driving box, one side in the interior of the driving box is provided with a worm, the upper side of the worm is engaged with a worm wheel, the center of the worm wheel is provided with a gear through a connecting shaft, one side of the gear is engaged with a rack, the bottom end of the rack penetrates through the driving box and is connected with the top of the pressing block, a shell is arranged on the top of the base on both sides, the interiors of the shells are all provided with wedge blocks, one end of each wedge block is provided with a connecting rod, one end of each connecting rod penetrates through the shell and is connected with a sliding seat, the top end of each sliding seat is provided with a side pushing plate, the wire is multi-azimuth composite clamped by relying on multiple self-locking constraints, wire loosening and slipping are effectively prevented, and the clamping firmness and long-term operation reliability of the 10kV power distribution line parallel line device are improved.

Description

Technical Field

[0001] This invention relates to the field of power distribution line construction technology, specifically to a shunt device for 10kV power distribution lines. Background Technology

[0002] 10kV distribution lines are a core component of urban and rural power distribution networks, responsible for transmitting power from substations to various distribution rooms and load terminals. Overhead conductors are laid in large quantities and are widely distributed. In the construction scenarios of overhead conductor splicing and same-phase branch current diversion, parallel connectors (industry standard name: parallel trench clamps) are required to achieve electrical connection between two overhead conductors. The clamping stability of the parallel connector directly determines the contact resistance of the line joint and the long-term operational safety.

[0003] For example, a parallel groove clamp disclosed in patent number CN208461416U places the conductor inside the clamping hole, rotates the bolt so that the top of the bolt abuts against the top cover, and then uses a nut and washer to lock and fix it. However, the locking of this device relies on the friction of the thread pair to prevent loosening. Under long-term outdoor vibration conditions, the nut is prone to spontaneous rotation and loosening, affecting the stability of the conductor clamping. Moreover, it only relies on the bolt and nut to form a vertical unidirectional pressing structure, lacking a lateral clamping mechanism. The conductor is only pressed from top to bottom, and the circumferential force is uneven, making the conductor prone to slippage. It is difficult to meet the requirements of long-term stable operation of 10kV overhead power distribution lines.

[0004] To address the aforementioned issues, there is an urgent need for innovative designs based on existing parallel connectors used in 10kV distribution lines. Summary of the Invention

[0005] The purpose of this invention is to provide a shunt for 10kV distribution lines to solve the problems mentioned in the background art regarding the insufficient clamping strength and stability of existing shunts for conductors, and the easy loosening and slippage of conductors.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a shunt device for 10kV distribution lines, comprising: A base, with a pressure block provided on top of the base; It also includes: a support, the main body is fixed to the base by a pole, and a drive box is provided on one side of the support. A worm is provided on one side inside the drive box, and a worm wheel is meshed on the top of the worm. A gear is provided in the center of the worm wheel through a shaft, and a rack is meshed on one side of the gear. The bottom end of the rack passes through the drive box and connects to the top of the pressure block. The housing is mainly located on both sides of the top of the base, and wedges are provided inside the housing. Drive blocks are provided on both sides of the bottom of the pressure block, and the bottom of the drive block cooperates with the inclined surface of the wedge. A connecting rod is provided at one end of the wedge, and one end of the connecting rod passes through the housing and is connected to a sliding seat. A side push plate is provided at the top of the sliding seat, and locking boxes are provided on the base at both ends of the sliding seat.

[0007] Preferably, the worm gear end extends to the outside of the drive box and is equipped with an operating end, and the outside of the operating end is formed into a handwheel structure, and the end face of the operating end is provided with a cross groove.

[0008] Preferably, the top surface of the base is provided with two sets of wire-laying grooves, and the bottom surface of the pressure block is provided with two sets of wire-pressing grooves. The inner walls of both the wire-laying grooves and the wire-pressing grooves are provided with a serrated structure to increase the friction coefficient between them and the outer surface of the overhead conductor.

[0009] Preferably, a first spring is provided on the connecting rod on one side of the wedge, and the two ends of the first spring abut against the wedge and the inner wall of the housing, respectively.

[0010] Preferably, guide rods are provided on the bases at both ends of the housing, and guide blocks are sleeved on the guide rods, with one end of each guide block connected to a sliding seat.

[0011] Preferably, each guide block has an arc-shaped groove on the side near the locking box, and a permanent magnet is embedded in each guide block on the side of the arc-shaped groove.

[0012] Preferably, the locking box is provided with a magnetic plate corresponding to the permanent magnet inside, and a movable block is provided at one end of the magnetic plate near the guide block. The end of the movable block extends out of the locking box and is provided with a limiting member. The other end of the magnetic plate near the guide block abuts against the inner wall of the locking box through a second spring.

[0013] Preferably, the limiting member is an arc-shaped structure, and the limiting member matches the arc-shaped groove.

[0014] Preferably, both ends of the locking box are provided with limiting protrusions, and both ends of the magnetic plate are provided with slots that match the limiting protrusions.

[0015] Preferably, the side push plates are all arc-shaped structures, and the side push plates are arranged facing each other on the left and right sides of the base.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This 10kV distribution line paralleling device relies on multiple self-locking constraints to achieve multi-directional composite clamping of the conductor, effectively preventing conductor loosening and slippage, reducing joint contact resistance, and improving the clamping firmness and long-term operational reliability of the paralleling device. The specific details are as follows: 1. The device is equipped with a base, wire feeding slot, pressure block, wire pressing slot, drive box, operating end, worm, worm wheel, gear and rack. The two sets of wires that need to be paralleled are placed into the wire feeding slots respectively. Rotating the operating end on the outside of the drive box drives the worm to rotate, the worm drives the worm wheel to rotate synchronously, the worm wheel drives the gear to rotate and mesh with the rack, converting the rotary motion into linear motion, which in turn drives the upper pressure block to move downward, so that the wire pressing slot of the upper pressure block presses the wire. Relying on the reverse self-locking characteristics of the worm wheel and worm, the transmission mechanism automatically locks after clamping in place, preventing the upper pressure block from retracting upward due to the rebound force of the wire and the vibration of the line. Compared with the traditional bolt and nut method of relying on thread friction to prevent loosening, the anti-loosening reliability is higher. 2. The device is equipped with a side push plate, a housing, a wedge, a connecting rod, a sliding seat, a drive block, and a first spring. When the upper pressure block moves downward, it drives the drive block to move downward synchronously. The drive block squeezes the wedge, and the vertical downward displacement of the upper pressure block is converted into the horizontal inward displacement of the wedge and the sliding seat through the wedge surface transmission. When the sliding seat moves horizontally, it drives the side push plate to move towards the conductor synchronously. During the inward movement of the side push plate, it implements constraint and interception from the outside of the conductor, forming a circumferential limit on the conductor. This prevents the conductor from moving outward and detaching from the clamping area due to vibration and tension, thus improving clamping stability. At the same time, it pushes the two conductors to come closer together, so that the outer walls of the two conductors fit tightly together, forming an additional conductive contact surface, effectively reducing the overall contact resistance and reducing the risk of overheating. 3. By setting up a locking box, magnetic plate, second spring, movable block, limiting component, permanent magnet, and arc-shaped groove, when the side push plate moves, the guide block slides along the guide rod. When the guide block moves to one side of the locking box, the permanent magnet generates an attraction force on the magnetic plate inside the locking box, causing the limiting component to embed into the arc-shaped groove of the guide block. Relying on the clamping stroke of the side push plate, the locking is triggered in a linkage manner, eliminating the need for additional locking operations by the operator. This achieves automatic locking when the clamp is in place, effectively preventing the side push plate from rebounding outward, continuously maintaining the lateral clamping force on the conductor, avoiding conductor slippage and increased contact resistance, and improving the clamping reliability of the distribution line parallel converter during long-term operation. Attached Figure Description

[0017] Figure 1 This is a side view of the structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram of the rear view structure of the present invention; Figure 4 This is a schematic diagram of the side cross-sectional structure of the housing of the present invention; Figure 5 This is a partially enlarged structural schematic diagram of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the housing of the present invention; Figure 7 This is a schematic diagram of the shell structure from a bottom view. Figure 8 This is a top view of the side push plate structure of the present invention; Figure 9 This is a top sectional view of the locking box of the present invention.

[0018] In the diagram: 1. Base; 101. Wire feeding groove; 2. Pressing block; 201. Drive block; 202. Wire pressing groove; 3. Drive box; 301. Operating end; 302. Worm gear; 303. Worm wheel; 304. Cross groove; 305. Gear; 306. Rack; 4. Support; 5. Housing; 501. Wedge; 502. Connecting rod; 503. Sliding seat; 504. Guide rod; 505. First spring; 506. Guide block; 507. Permanent magnet; 508. Arc-shaped groove; 6. Side push plate; 7. Locking box; 701. Magnetic plate; 702. Movable block; 703. Second spring; 704. Limiting protrusion; 705. Limiting component. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1-5 This invention provides a technical solution: a shunt device for 10kV distribution lines, comprising: The base 1 has a pressure block 2 on top of it. The top surface of the base 1 has two sets of wire feeding grooves 101, and the bottom surface of the pressure block 2 has two sets of wire pressing grooves 202. The inner walls of the wire feeding grooves 101 and the wire pressing grooves 202 are provided with a serrated anti-slip structure. This device is applied to the splicing of overhead conductors in 10kV urban and rural power distribution. During construction, the two overhead conductors to be spliced ​​are placed inside the two sets of wire laying grooves 101 on the base 1. The sawtooth structure set on the inner wall of the wire laying groove 101 and the wire pressing groove 202 can effectively increase the contact friction coefficient between the groove and the outer wall of the conductor, and prevent the conductor from axially slipping and circumferentially rotating under long-term wind vibration and line tension. At the same time, it can pierce the oxide film on the surface of the conductor and improve the tightness of metal bonding. A support 4 is fixedly installed on the base 1 by a vertical pole. A drive box 3 is fixedly mounted on the outside of the support 4. A worm gear 302 is rotatably installed on one side inside the drive box 3. A worm wheel 303 is meshed on the top of the worm gear 302. A gear 305 is fixedly installed at the center of the worm wheel 303 by a connecting shaft. A rack 306 is meshed on one side of the gear 305. The bottom end of the rack 306 passes through the drive box 3 and is fixedly connected to the top surface of the pressure block 2. An operating end 301 is fixedly installed on the outside of the drive box 3 at the outer end of the worm gear 302. The outer side of the operating end 301 is formed into a handwheel structure, and a cross groove 304 is opened on the end face of the operating end 301. The operator can choose to directly turn the handwheel of the operating end 301 for manual rotation, or use a Phillips screwdriver embedded in the Phillips groove 304 for auxiliary force. The rotation of the operating end 301 synchronously drives the worm 302 to rotate. The worm 302 meshes with and drives the worm wheel 303 to rotate at a constant speed. The worm wheel 303 drives the coaxial gear 305 to rotate synchronously. By utilizing the meshing transmission between the gear 305 and the rack 306, the rotational motion of the worm 302 is converted into the vertical linear downward motion of the rack 306, which in turn stably drives the bottom pressure block 2 to move vertically downward as a whole. This causes the wire pressing groove 202 at the bottom of the pressure block 2 to press tightly against the upper outer wall of the two wires. Together with the wire release groove 101 of the base 1, the vertical clamping and positioning of the wires is completed. After the clamping is in place, the wire rebound force and the impact force of line wind vibration cannot drive the worm wheel 303 and worm 302 to rotate in the opposite direction. This eliminates the defects of traditional bolt locking structure, which is easy to loosen and easy to unravel, from the transmission source, and improves the stability of vertical clamping. Example 2: Based on Example 1, this technical solution further discloses the following... Figure 1 , Figure 6 and Figure 7 The lateral linkage clamping structure shown; A housing 5 is symmetrically fixedly installed on the left and right sides of the top of the base 1. A wedge block 501 is slidably assembled inside the housing 5. A driving block 201 is fixedly installed on both sides of the bottom of the pressure block 2. The bottom slope of the driving block 201 and the top slope of the wedge block 501 fit together. A connecting rod 502 is fixedly connected to the outside of the wedge block 501. The outside of the connecting rod 502 extends out of the housing 5 and is fixedly connected to a sliding seat 503. A first spring 505 is sleeved on the outside of the connecting rod 502. The two ends of the first spring 505 abut against the wedge block 501 and the inner wall of the housing 5, respectively. An arc-shaped side push plate 6 is fixedly installed at the top of the sliding seat 503. A guide rod 504 is fixedly installed on the base 1 outside the sliding seat 503. A guide block 506 is slidably sleeved on the outside of the guide rod 504. The inside of the guide block 506 is fixedly connected to the sliding seat 503. During the process of the pressure block 2 pressing the conductor vertically downward, the drive blocks 201 on both sides of the bottom of the pressure block 2 move downward synchronously. The inclined slope of the drive block 201 continuously squeezes the wedge block 501 inside the housing 5. Using the inclined wedge clamping transmission principle, the vertical downward displacement of the pressure block 2 is efficiently converted into the horizontal inward displacement of the wedge block 501. The wedge block 501 drives the outer sliding seat 503 to slide smoothly along the guide rod 504 through the connecting rod 502. The guide rod 504 can limit the movement trajectory of the sliding seat 503 to prevent the side push plate 6 from deviating or tilting, and ensure that the clamping action on both sides is synchronous and symmetrical. During the movement of the sliding seat 503, the top arc-shaped side push plate 6 is driven to move towards the outside of the conductor synchronously. The side push plates 6 on both sides intercept and limit the conductor from the outside of the two conductors, realizing all-round constraint of the conductor in the circumference, preventing the conductor from deviating outward or falling out of the clamping area due to wind vibration and line tension. At the same time, the two side push plates 6 push inward simultaneously, which can push the outer walls of the two parallel overhead conductors to fit tightly into contact, so that a large area of ​​contact conductive surface is formed between the two conductors. This changes the traditional parallel connector mode that relies solely on the wire clamp body for conductivity, effectively disperses the current density, reduces the overall contact resistance of the connector, and reduces heat loss and overheating failure risk during long-term operation. Example 3: Based on Examples 1 and 2, this technical solution further discloses a self-locking structure, specifically as follows: Figure 6 , Figure 8 and Figure 9 As shown; An arc-shaped groove 508 is provided on the outer side of the guide block 506, and a permanent magnet 507 is embedded inside the guide block 506. Locking boxes 7 are fixed at both ends of the base 1. A magnetic plate 701 corresponding to the permanent magnet 507 is provided inside the locking box 7. A movable block 702 is fixed at one end of the magnetic plate 701. The end of the movable block 702 protrudes from the locking box 7 and is equipped with an arc-shaped limiting piece 705. The other end of the magnetic plate 701 abuts against the inner wall of the locking box 7 through a second spring 703. Limiting protrusions 704 are fixed at both ends inside the locking box 7. The magnetic plate 701 has a slot structure that matches the limiting protrusions 704 at both ends. After the sliding seat 503 drives the guide block 506 to move horizontally inward and the wire is clamped in place, the permanent magnet 507 embedded inside the guide block 506 gradually approaches the magnetic plate 701 inside the locking box 7. The magnetic plate 701 is pulled towards the guide block 506 by the permanent magnet attraction force. The two ends of the magnetic plate 701 slide with the limiting protrusion 704 inside the locking box 7 through the slots to ensure that the movement is smooth and without jamming. While the magnetic plate 701 moves, the second spring 703 is compressed, and the end movable block 702 and the arc-shaped limiting member 705 are fed synchronously, so that the limiting member 705 is embedded in the arc-shaped groove 508 of the guide block 506, realizing the automatic locking of the lateral clamping mechanism. The magnetic locking structure relies on the clamping stroke linkage trigger of the side push plate 6, which does not require additional manual operation. It can automatically lock when the clamping is in place, with a high degree of automation. The end self-locking structure and the front worm gear 303 and worm 302 source self-locking structure work together to form a double anti-loosening system, which fully ensures the clamping firmness of the conductor by the parallel connector, solves the defects of traditional parallel connectors such as unidirectional clamping, easy loosening, easy slippage and poor stability, and is suitable for the long-term outdoor complex operating conditions of 10kV distribution lines. When the parallel cable needs to be removed, the operator turns the handwheel at the operating end 301 in the opposite direction or inserts a Phillips screwdriver into the Phillips groove 304 to rotate in the opposite direction. The worm 302 rotates in the opposite direction, and the worm 302 drives the worm wheel 303 and the coaxial gear 305 to rotate in the opposite direction. The gear 305 meshes with the rack 306 to convert the rotational motion into the vertical linear upward motion of the rack 306, and the pressure block 2 moves vertically upward as a whole. As the pressure block 2 moves upward, the inclined surfaces of the driving blocks 201 on both sides of its bottom gradually separate from the inclined surfaces of the top of the wedge block 501, the horizontal component of the wedge force disappears, the first spring 505 inside the housing 5 rebounds from the compressed state, and pulls the wedge block 501 back to its original position along the sliding cavity of the housing 5. The wedge block 501 drives the sliding seat 503 to slide along the guide rod 504 via the connecting rod 502, and the arc-shaped side push plate 6 simultaneously moves away from the outside of the wire. The two wires lose the lateral squeezing force, and the large area of ​​the conductive contact surface between their outer walls separates accordingly, and the wires return to the state where they can be extracted. As the sliding seat 503 moves outward, the guide block 506 slides outward synchronously. The permanent magnet 507 embedded inside it gradually moves away from the magnetic plate 701 in the locking box 7. The permanent magnet attraction force weakens, the second spring 703 is released from the compressed state, and pushes the magnetic plate 701 to slide in the opposite direction. The arc-shaped limiting piece 705 is driven by the movable block 702 to disengage from the arc-shaped groove 508 of the guide block 506. The magnetic end self-locking is released, and the guide block 506 resumes free sliding. At this time, the two overhead wires can be pulled out from the wire release groove 101 of the base 1 respectively, and the disassembly is completed.

[0021] 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 shunt switch for 10kV distribution lines, comprising: A base (1) is provided with a pressure block (2) on top of the base (1); Its characteristic is that it further includes: The support (4) is fixed to the base (1) by a pole, and a drive box (3) is provided on one side of the support (4). A worm (302) is provided on one side inside the drive box (3), and a worm wheel (303) is meshed on the top of the worm (302). A gear (305) is provided in the center of the worm wheel (303) through a shaft, and a rack (306) is meshed on one side of the gear (305). The bottom end of the rack (306) passes through the drive box (3) and connects to the top of the pressure block (2). The housing (5) is mainly located on both sides of the top of the base (1), and wedges (501) are provided inside the housing (5). Drive blocks (201) are provided on both sides of the bottom of the pressure block (2), and the bottom of the drive block (201) cooperates with the inclined surface of the wedge (501). A connecting rod (502) is provided at one end of the wedge (501), and one end of the connecting rod (502) passes through the housing (5) and is connected to a sliding seat (503). A side push plate (6) is provided at the top of the sliding seat (503), and a locking box (7) is provided on the base (1) at both ends of the sliding seat (503).

2. A shunt switch for a 10kV distribution line according to claim 1, characterized in that: The end of the worm (302) extends to the outside of the drive box (3) and is equipped with an operating end (301). The outside of the operating end (301) is formed into a handwheel structure, and a cross groove (304) is provided on the end face of the operating end (301).

3. A paralleling device for 10kV distribution lines according to claim 1, characterized in that: The top surface of the base (1) is provided with two sets of wire-laying grooves (101), and the bottom surface of the pressure block (2) is provided with two sets of wire-pressing grooves (202). The inner walls of the wire-laying grooves (101) and the wire-pressing grooves (202) are provided with serrated structures to increase the friction coefficient between them and the outer surface of the overhead conductor.

4. A paralleling device for 10kV distribution lines according to claim 1, characterized in that: A first spring (505) is provided on the connecting rod (502) on one side of the wedge (501), and the two ends of the first spring (505) abut against the wedge (501) and the inner wall of the housing (5) respectively.

5. A paralleling device for 10kV distribution lines according to claim 1, characterized in that: Guide rods (504) are provided on the bases (1) at both ends of the housing (5), and guide blocks (506) are sleeved on the guide rods (504). One end of the guide blocks (506) is connected to the sliding seat (503).

6. A paralleling device for 10kV distribution lines according to claim 5, characterized in that: Each guide block (506) has an arc-shaped groove (508) on the side near the locking box (7), and a permanent magnet (507) is embedded in the guide block (506) on the side of the arc-shaped groove (508).

7. A paralleling device for 10kV distribution lines according to claim 6, characterized in that: The locking box (7) is provided with a magnetic plate (701) corresponding to the permanent magnet (507) inside. A movable block (702) is provided at one end of the magnetic plate (701) near the guide block (506). The end of the movable block (702) extends out of the locking box (7) and is provided with a limiting member (705). The other end of the magnetic plate (701) near the guide block (506) abuts against the inner wall of the locking box (7) through a second spring (703).

8. A paralleling device for 10kV distribution lines according to claim 7, characterized in that: The limiting member (705) has an arc-shaped structure and matches the arc-shaped groove (508).

9. A paralleling device for 10kV distribution lines according to claim 7, characterized in that: The locking box (7) has a limiting protrusion (704) at both ends, and the magnetic plate (701) has a slot at both ends that matches the limiting protrusion (704).

10. A paralleling device for 10kV distribution lines according to claim 1, characterized in that: The side push plates (6) are all arc-shaped structures, and the side push plates (6) are arranged facing each other on the left and right sides of the base (1).

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