Strain clamp equipment for electric power engineering

Abstract

The invention discloses strain clamp equipment for electric power engineering, which comprises a clamp main body, a guide groove is formed in the clamp main body, two groups of U-shaped pipes sleeve one end of the clamp main body, a cavity is formed in the clamp main body, an elliptical limiting wheel is fixed on a rotating shaft, and a connecting block is fixed on the side part of the elliptical limiting wheel. The elliptical limiting wheel in the inner cavity of the wire clamp body can be attached to the outer surface of the wire clamp body after the wire is inserted into the guide groove, when the wire loosens in the guide groove due to shaking or loosening of the U-shaped pipe, the wire moves and then drives the elliptical limiting wheel to rotate through friction force, the wire is extruded after rotation of the elliptical limiting wheel, and the wire is clamped in the guide groove. And the larger the displacement of the wire is, the larger the rotation amplitude of the elliptical limiting wheel is, and the pressing force on the wire is increased, so that the purpose of tightening the wire is achieved, the wire can be automatically pressed at the initial stage of loosening, and the worsening of wire falling is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field related to power engineering equipment, and in particular to a tension clamp device used in power engineering. Background Art

[0002] The tension clamp in power engineering is a kind of hardware used to fix the conductor or lightning conductor on the tension insulator string of non-linear tower. It acts as an anchor and is also used to fix the guy wire of the guy tower. It bears the tension of the conductor and transfers the tension to the insulator string and tower. It is particularly important when the line is subject to external forces such as strong winds and icing.

[0003] The Chinese patent with the announcement number CN2517158Y discloses a strong tension clamp, which is characterized by 1. cast steel strong tension clamp body; 2. non-magnetic metal protection tube; 3. non-magnetic stainless steel U-shaped screws, and the strong tension clamp is equipped with stainless steel U-shaped screws. The combination of the three constitutes a new type of strong tension clamp, which is safe and energy-saving, simple in structure, easy to install, does not damage the wire, has a large unit pressure, large friction, large gripping force, and the gripping force on the wire is greater than the breaking force of the wire. The strong tension clamp is safer, more reliable and energy-saving in operation.

[0004] However, the above patent still has the following shortcomings:

[0005] The above patent locks the conductor by means of U-bolts. During operation, the conductor will vibrate due to natural factors such as wind. Long-term vibration or dancing will cause the bolts to loosen or cause a slight displacement between the conductor and the wire clamp that was originally crimped tightly. This will cause the conductor to sag, and the safe distance between the conductor and the ground or objects such as buildings and trees below will be reduced. Discharge to the ground may occur, resulting in a grounding fault. Since transmission cables are usually at high altitudes, existing tension clamps cannot promptly assist in fixing the conductor when the conductor becomes loose. Before the staff inspects it, the loose conductor problem may gradually worsen, thereby increasing the risk of electric shock to people on the ground. Summary of the invention

[0006] The purpose of the present invention is to provide a tension wire clamp device for power engineering to solve the problem that the existing tension wire clamps mentioned in the above background technology are inconvenient to assist in fixing the wire in time when the wire becomes loose, and the loose wire problem may gradually worsen before the staff inspects it, thereby increasing the risk of electric shock for people on the ground.

[0007] To achieve the above object, the present invention provides the following technical solution: a tension clamp device for electric power engineering, comprising a clamp body,

[0008] A guide groove is provided inside the wire clamp body, and a conductor is arranged in the guide groove. Two sets of U-shaped tubes are sleeved on one end of the wire clamp body, and a wedge-shaped plate is fixed at the bottom of the U-shaped tube. Limiting grooves are provided on both sides of the outer wall of the wire clamp body, and both sides of the U-shaped tube are located in the limiting grooves.

[0009] A locking assembly is provided at the bottom of the wire clamp body, and the locking assembly is used to drive the U-shaped tube to move vertically;

[0010] A cavity is provided inside the wire clamp body, and a rotating shaft is arranged in the cavity, an elliptical limiting wheel is fixed on the rotating shaft, and a connecting block is fixed on the side of the elliptical limiting wheel, a vertical rod is provided through the bottom of the wire clamp body, and the top of the vertical rod is connected to the connecting block through a connecting rod, and both ends of the connecting rod are rotatably connected to the vertical rod and the connecting block.

[0011] In the above technical scheme, by setting the locking assembly, the two groups of U-shaped tubes can be driven to move vertically, so that the U-shaped tubes can press the wires tightly. The elliptical limiting wheel in the internal cavity of the wire clamp body will fit the outer surface of the wire after the wire is inserted into the guide groove. When the wire is loosened due to shaking or the U-shaped tube is loose, a pulling force will be generated at the left end of the wire, and the wire will be driven to move in the guide groove. Since the elliptical limiting wheel is in contact with the wire, the elliptical limiting wheel will be driven to rotate by friction after the wire moves. After the elliptical limiting wheel rotates, it will squeeze the wire. The greater the displacement of the wire, the greater the rotation amplitude of the elliptical limiting wheel will be, and the pressing force on the wire will also increase, so as to achieve the purpose of tightening. This technical scheme can be used when the wire is loose and drooping. The mechanism can automatically compress and fix the conductor in time, avoiding the risk of the conductor falling off the wire clamp body due to loosening, and the mechanism can achieve self-compensation to a certain extent, and can automatically compress the conductor at the early stage of conductor loosening, reducing the dependence on the frequency of manual inspections. This greatly reduces the workload and difficulty of maintenance personnel for some transmission lines located in remote areas or in harsh environments, and the mechanism can automatically increase the clamping force on the conductor to ensure that the conductor is still firmly fixed in the wire clamp body under high tension to maintain the normal operation of the line. Since the conductor can be fixed in time, it can also avoid damage to the conductor due to sagging or excessive shaking, thereby reducing the inspection frequency of the conductor and reducing maintenance costs.

[0012] Preferably, a connector is provided on the top of the wire clamp body, and the connector is connected to the wire clamp body via a latch.

[0013] In the above technical solution, one end of the connector is connected to the wire clamp body through a plug, and the other end of the connector can be connected to the pole tower through an insulator string.

[0014] Preferably, the locking assembly includes a bidirectional screw rod, which is laterally installed at the bottom of the wire clamp body, and a handwheel is provided on the outside of the wire clamp body, the handwheel is connected to the bidirectional screw rod, and wedge blocks are threadedly connected at both ends of the bidirectional screw rod. A limit assembly is also provided at the bottom of the wire clamp body, and the limit assembly is used to lock the bidirectional screw rod.

[0015] In the above technical scheme, due to the limited operating space and complex working conditions in the high-altitude environment, the comparative document uses multiple U-bolts to lock the wires. The operator needs to tighten the bolts one by one and ensure that the tightening degree of each bolt is appropriate, which will consume a lot of time. In this technical scheme, the handwheel can be rotated to drive the bidirectional screw to rotate, and the bidirectional screw can drive the two groups of wedge blocks to move laterally and drive the two groups of wedge blocks closer to each other. When the two groups of wedge blocks move laterally, their bottoms will resist the wedge plates at the bottom of the U-shaped tube, and will drive the wedge plates and the U-shaped tube to move vertically, so that the U-shaped tube descends to press and fix the wires. This technical scheme can facilitate the locking of multiple U-shaped tubes at one time. Compared with tightening the bolts one by one, it can greatly reduce the operating steps, shorten the high-altitude operation time, and reduce the time and labor intensity of high-altitude operations. In addition, the design of the mechanism makes it easy to disassemble and install, and also reduces the difficulty of later maintenance.

[0016] Preferably, the limiting assembly includes a gear, which is installed at the bottom of the wire clamp body and connected to the bidirectional screw rod. A fixed rod is also fixed to the bottom of the wire clamp body, and a movable block is sleeved on the fixed rod. A clamping strip is fixed to the side of the movable block, and one end of the clamping strip passes through the tooth groove of the gear. A tension spring is sleeved on the fixed rod, and both ends of the tension spring are respectively connected to the wire clamp body and the movable block, and a pull ring is fixed to the bottom of the movable block.

[0017] In the above technical solution, before rotating the bidirectional screw rod, the pull ring can be pulled to drive the movable block to move to the end away from the gear, so that the movable block drives the clamping strip to be pulled out from the tooth groove of the gear to unlock the gear. When the bidirectional screw rod is rotated, it will drive the gear to rotate at the same time. When the U-shaped tube presses the wire, the pull ring can be loosened. At this time, the movable block moves to the end close to the gear under the elastic force of the tension spring, and the movable block drives the clamping strip to be inserted into the tooth groove of the gear, thereby locking the gear and the bidirectional screw rod. This mechanism can prevent the bidirectional screw rod from rotating and causing the U-shaped tube to loosen, thereby improving the stability of the U-shaped tube.

[0018] Preferably, the elliptical limiting wheel is provided with grooves, and the grooves are provided with a plurality of groups.

[0019] In the above technical solution, the provision of the groove can increase the friction between the elliptical limiting wheel and the wire, prevent the elliptical limiting wheel and the wire from slipping, and improve reliability during use.

[0020] Preferably, a pressure block is fixed at the bottom of the vertical rod, and a spring is sleeved on the vertical rod, and two ends of the spring are respectively connected to the pressure block and the wire clamp body.

[0021] In the above technical solution, the elastic force generated by the spring will drive the pressure block and the vertical rod to generate a downward force. After the vertical rod generates a downward force, it will drive the two ends of the connecting rod to rotate on the vertical rod and the connecting block respectively, and pull down the connecting block. The connecting block is located at one end of the elliptical limiting wheel. When the connecting block and one end of the elliptical limiting wheel generate a downward force, the other end of the elliptical limiting wheel will tilt up and press against the wire. In this way, the elliptical limiting wheel can fit tightly against the wire, so that when the wire is displaced, the elliptical limiting wheel can press the wire in time to fix it, thereby greatly improving the operational reliability.

[0022] Compared with the prior art, the invention has the following beneficial effects: the tension clamp device for electric power engineering,

[0023] (1) The elliptical limiting wheel in the inner cavity of the wire clamp body will fit the outer surface of the wire after it is inserted into the guide groove. When the wire loosens in the guide groove due to shaking or loosening of the U-shaped tube, the wire moves and drives the elliptical limiting wheel to rotate through friction. The elliptical limiting wheel rotates and squeezes the wire. The greater the displacement of the wire, the greater the rotation amplitude of the elliptical limiting wheel, and the greater the clamping force on the wire, so as to achieve the purpose of tightening the wire. In addition, the wire can be automatically clamped at the early stage of looseness, avoiding the further deterioration of the wire falling and reducing the dependence on the frequency of manual inspection. This greatly reduces the workload and difficulty of maintenance personnel for some transmission lines located in remote areas or harsh environments.

[0024] (2) The guide groove is L-shaped. After the wire is inserted into the guide groove, the elliptical limiting wheel is set at the bend of the wire. Since the shape of the curved section of the guide groove itself provides a certain anchoring effect for the wire, when the elliptical limiting wheel squeezes and fixes the wire in the curved section, the wire will increase the friction between the inner wall of the guide groove due to its own curved shape. The elliptical limiting wheel squeezes the wire. In this way, the wire needs to overcome greater friction and resistance to slide in the curved section, thereby improving the anti-slip effect of the wire, thereby improving the fixing effect of the elliptical limiting wheel on the wire and reducing the possibility of secondary loosening of the wire.

[0025] (3) By arranging a wedge plate at the bottom of the U-shaped tube and arranging multiple groups of wedge blocks on the bidirectional screw, when the bidirectional screw rotates, it will simultaneously drive the multiple groups of wedge blocks to move laterally against the wedge plate, thereby simultaneously driving the multiple groups of wedge plates and the U-shaped tube to descend to clamp and fix the wires. Compared with tightening the bolts one by one, the operation steps can be greatly reduced, the time for high-altitude operations can be shortened, and the time and labor intensity for high-altitude operations can be reduced. In addition, the design of the mechanism makes it easy to disassemble and install, and also reduces the difficulty of later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view structural schematic diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the side view structure of the U-shaped tube of the present invention;

[0029] Figure 4 For the present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0030] Figure 5 It is a schematic diagram of the side structure of the elliptical limiting wheel and the vertical rod of the present invention.

[0031] In the figure: 1. wire clamp body, 2. guide groove, 3. wire, 4. pin, 5. connector, 6. U-shaped tube, 7. wedge plate, 8. locking assembly, 801. bidirectional screw rod, 802. hand wheel, 803. wedge block, 9. limit assembly, 901. gear, 902. fixed rod, 903. movable block, 904. clamping strip, 905. tension spring, 906. pull ring, 10. rotating shaft, 11. elliptical limit wheel, 12. groove, 13. connecting block, 14. vertical rod, 15. connecting rod, 16. pressure block, 17. spring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-5 The present invention provides a technical solution: a tension clamp device for electric power engineering, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a guide groove 2 is provided inside the wire clamp body 1, and a conductor 3 is arranged in the guide groove 2. Two sets of U-shaped tubes 6 are sleeved at one end of the wire clamp body 1, and a wedge-shaped plate 7 is fixed at the bottom of the U-shaped tube 6. Limiting grooves are provided on both sides of the outer wall of the wire clamp body 1, and both sides of the U-shaped tube 6 are located in the limiting grooves;

[0034] A locking assembly 8 is provided at the bottom of the wire clamp body 1, and the locking assembly 8 is used to drive the U-shaped tube 6 to move vertically;

[0035] A cavity is provided inside the wire clamp body 1, and a rotating shaft 10 is arranged in the cavity, an elliptical limiting wheel 11 is fixed on the rotating shaft 10, and a connecting block 13 is fixed on the side of the elliptical limiting wheel 11, a vertical rod 14 is provided through the bottom of the wire clamp body 1, and the top of the vertical rod 14 is connected to the connecting block 13 through a connecting rod 15, and both ends of the connecting rod 15 are rotatably connected to the vertical rod 14 and the connecting block 13.

[0036] like Figure 1 As shown, a connector 5 is provided on the top of the wire clamp body 1 , and the connector 5 is connected to the wire clamp body 1 through a pin 4 .

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the locking assembly 8 includes a bidirectional screw rod 801, which is horizontally installed at the bottom of the wire clamp body 1, and a hand wheel 802 is arranged on the outside of the wire clamp body 1, the hand wheel 802 is connected to the bidirectional screw rod 801, and wedge blocks 803 are threadedly connected at both ends of the bidirectional screw rod 801. A limit assembly 9 is also arranged at the bottom of the wire clamp body 1, and the limit assembly 9 is used to lock the bidirectional screw rod 801.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the limiting assembly 9 includes a gear 901, which is installed at the bottom of the wire clamp body 1 and is connected to the bidirectional screw rod 801. A fixed rod 902 is also fixed to the bottom of the wire clamp body 1, and a movable block 903 is sleeved on the fixed rod 902. A clamping strip 904 is fixed to the side of the movable block 903, and one end of the clamping strip 904 passes through the tooth groove of the gear 901. A tension spring 905 is sleeved on the fixed rod 902, and both ends of the tension spring 905 are respectively connected to the wire clamp body 1 and the movable block 903, and a pull ring 906 is fixed to the bottom of the movable block 903.

[0039] like Figure 2 and Figure 5 As shown, the elliptical limiting wheel 11 is provided with grooves 12, and the grooves 12 are provided in a plurality of groups.

[0040] like Figure 2 and Figure 5 As shown, a pressing block 16 is fixed at the bottom of the vertical rod 14, and a spring 17 is sleeved on the vertical rod 14, and two ends of the spring 17 are respectively connected to the pressing block 16 and the wire clamp body 1.

[0041] Working principle: When in use, one end of the connector 5 can be connected to the wire clamp body 1 through the pin 4, and the other end of the connector 5 can be connected to the pole tower through the insulator string, and then the conductor 3 can be moved into the guide groove 2 inside the wire clamp body 1. Before that, push the pressure block 16 upward to drive the vertical rod 14 to rise. At this time, the two ends of the connecting rod 15 will rotate on the vertical rod 14 and the connecting block 13 respectively, and push the connecting block 13 to rise. At this time, the elliptical limiting wheel 11 will rotate, and the elliptical limiting wheel 11 will not occupy the internal space of the guide groove 2 to prevent the conductor 3 from being unable to penetrate the guide groove 2 inside the wire clamp body 1. After the conductor 3 is penetrated, release the pressure block 16, and the spring 17 will drive the pressure block 16 and the vertical rod 14 to descend, and the vertical rod 14 will descend. After the wire 3 is lowered, the two ends of the connecting rod 15 will rotate on the vertical rod 14 and the connecting block 13 respectively, and pull down the connecting block 13, and the connecting block 13 is located at one end of the elliptical limiting wheel 11. When the connecting block 13 generates a downward force, the other end of the elliptical limiting wheel 11 will tilt up and press against the wire 3, so that the elliptical limiting wheel 11 can fit tightly against the wire 3. When fixing the wire 3, first pull the pull ring 906 to drive the movable block 903 to move to the end away from the gear 901, so that the movable block 903 drives the card strip 904 to be pulled out from the tooth groove of the gear 901 to unlock the gear 901 and the bidirectional lead screw 801, and then rotate the hand wheel 802 to drive the bidirectional lead screw 801 to rotate, and the bidirectional lead screw 801 The two groups of wedge blocks 803 will be driven to approach each other. When the two groups of wedge blocks 803 are close to each other, their bottoms will abut against the wedge plates 7 at the bottom of the U-shaped tube 6, and drive the U-shaped tube 6 to descend in the limiting grooves on both sides of the wire clamp body 1. The limiting grooves play a role in vertically guiding the U-shaped tube 6, so that the U-shaped tube 6 can be descended to press and fix the wire 3. After the wire 3 is fixed, the pull ring 906 can be loosened. At this time, the movable block 903 moves toward the end close to the gear 901 under the elastic force of the tension spring 905. The movable block 903 will drive the card strip 904 to insert into the tooth groove of the gear 901, so as to lock the gear 901 and the bidirectional lead screw 801 to prevent the bidirectional lead screw 801 from rotating and causing the U-shaped tube 6 to loosen. During use, when the wire 3 is loose in the guide groove 2 due to shaking or the loosening of the U-shaped tube 6 or other factors, the left end of the wire 3 generates tension, which will drive the wire 3 to move in the guide groove 2. Since the elliptical limiting wheel 11 is in contact with the wire 3, the wire 3 will drive the elliptical limiting wheel 11 to rotate through friction after moving. After the elliptical limiting wheel 11 rotates, it will squeeze the wire 3. The greater the displacement of the wire 3, the greater the rotation amplitude of the elliptical limiting wheel 11 will be, and the clamping force on the wire 3 will also increase, achieving the purpose of tightening more and more. It can automatically clamp the wire 3 at the early stage of relaxation, reducing the dependence on the frequency of manual inspections and avoiding the further deterioration of the falling of the wire 3.

[0042] This completes the entire operation, and the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0043] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tension clamp device for electric power engineering, comprising a clamp body (1), characterized in that: A guide groove (2) is provided inside the wire clamp body (1), and a conductor (3) is arranged in the guide groove (2); two groups of U-shaped tubes (6) are sleeved on one end of the wire clamp body (1), and a wedge-shaped plate (7) is fixed at the bottom of the U-shaped tube (6); and limiting grooves are provided on both sides of the outer wall of the wire clamp body (1), and both sides of the U-shaped tube (6) are located in the limiting grooves; A locking assembly (8) is provided at the bottom of the wire clamp body (1), and the locking assembly (8) is used to drive the U-shaped tube (6) to move vertically; The wire clamp body (1) has a cavity inside, and a rotating shaft (10) is arranged in the cavity, an elliptical limiting wheel (11) is fixed on the rotating shaft (10), and a connecting block (13) is fixed on the side of the elliptical limiting wheel (11), a vertical rod (14) is arranged through the bottom of the wire clamp body (1), and the top of the vertical rod (14) is connected to the connecting block (13) through a connecting rod (15), and both ends of the connecting rod (15) are rotatably connected to the vertical rod (14) and the connecting block (13).

2. A tension clamp device for electric power engineering according to claim 1, characterized in that: A connector (5) is provided on the top of the wire clamp body (1), and the connector (5) is connected to the wire clamp body (1) via a latch (4).

3. The tension clamp device for electric power engineering according to claim 1, characterized in that: The locking assembly (8) comprises a bidirectional screw rod (801), the bidirectional screw rod (801) being transversely mounted at the bottom of the wire clamp body (1), and a hand wheel (802) being arranged on the outside of the wire clamp body (1), the hand wheel (802) being connected to the bidirectional screw rod (801), and wedge blocks (803) being threadedly connected at both ends of the bidirectional screw rod (801), and a limit assembly (9) being arranged at the bottom of the wire clamp body (1), and the limit assembly (9) being used to lock the bidirectional screw rod (801).

4. A tension clamp device for electric power engineering according to claim 3, characterized in that: The limit assembly (9) comprises a gear (901), the gear (901) is mounted on the bottom of the wire clamp body (1), and the gear (901) is connected to the bidirectional screw rod (801), a fixed rod (902) is also fixed on the bottom of the wire clamp body (1), and a movable block (903) is sleeved on the fixed rod (902), a clamping strip (904) is fixed on the side of the movable block (903), and one end of the clamping strip (904) passes through the tooth groove of the gear (901), a tension spring (905) is sleeved on the fixed rod (902), and the two ends of the tension spring (905) are respectively connected to the wire clamp body (1) and the movable block (903), and a pull ring (906) is fixed on the bottom of the movable block (903).

5. The tension clamp device for electric power engineering according to claim 1, characterized in that: The elliptical limiting wheel (11) is provided with grooves (12), and the grooves (12) are provided in a plurality of groups.

6. The tension clamp device for electric power engineering according to claim 1, characterized in that: A pressing block (16) is fixed at the bottom of the vertical rod (14), and a spring (17) is sleeved on the vertical rod (14), with two ends of the spring (17) respectively connected to the pressing block (16) and the wire clamp body (1).

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