Mountain area adaptation type geoelectric potential precise operation insulation puncture line clamp and use method

Abstract

This invention discloses a precision ground potential operation insulation piercing clamp adapted for mountainous areas and its usage method, belonging to the technical field of power distribution line connection components. The clamp includes an upper shell, a lower shell, and an installation assembly. Both the upper and lower shells have piercing plates on their inner sides, achieving piercing through bolt-driven closure. The bolt bottom has a tightening groove. The installation assembly includes a support rod, a fixing rod, and a tightening rod, enabling ground potential tightening operations. The upper and lower shells are positioned by sliders and grooves, and a sealing strip enhances sealing performance. The usage method includes pre-operation parameter calculation, hoisting and positioning, precise ground potential tightening, assembly retrieval, and reliability verification. The number of bolt tightening turns is calculated and corrected using formulas, and temperature and tension parameters are considered to ensure piercing accuracy. This invention is suitable for complex mountainous environments, enabling safe ground potential operation, improving piercing and sealing reliability, reducing labor intensity, and is applicable to 10-35kV mountainous power distribution line conductor connections.

Description

Technical Field

[0001] This invention relates to the field of power distribution line connection components, and in particular to a mountain-adaptive ground potential precision operation insulation piercing clamp and its usage method. Background Technology

[0002] In the construction and maintenance of power distribution lines in mountainous areas, insulation piercing clamps are core components for conductor branching and splicing. Their adaptability, operational safety, and connection reliability directly affect the stability of line operation. Mountainous terrain is complex, and work sites are often located at high altitudes and on steep slopes. Traditional insulation piercing clamps have many adaptability defects and cannot meet the requirements for precise ground potential operation.

[0003] Existing piercing clamps mostly use a direct bolt tightening structure, requiring operators to work at close range at heights. This not only results in high labor intensity and low work efficiency but also poses safety hazards such as falls from heights and electric shocks. Furthermore, the frequent occurrence of harsh environments in mountainous areas, such as dampness, rain, snow, and heavy fog, exacerbates the inadequacy of traditional clamps' sealing performance, leading to moisture intrusion, accelerated insulation aging, and potentially causing short circuits and leakage faults. In addition, existing clamps have poor positioning accuracy and are prone to misalignment during closure, affecting the piercing effect. Therefore, there is an urgent need for an insulated piercing clamp that is suitable for mountainous environments, allows for precise ground potential operation, provides reliable sealing, and is easy to install, thus addressing the shortcomings of existing technologies. Summary of the Invention

[0004] This invention aims to solve the problems of low operational safety, insufficient puncture accuracy, poor sealing reliability, and unsatisfactory installation of existing insulation puncture clamps in mountainous operations. It provides an insulation puncture clamp that is suitable for mountainous environments, can be operated with precise ground potential, and has a stable seal, thus ensuring the quality of line connections and operational safety.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A mountain-adaptive, precision-operated insulating piercing clamp for ground potential control includes an upper housing and a lower housing. Piercing plates are fixedly installed on the inner sides of both the upper and lower housings. A strip block is fixedly connected to the top of the upper housing, and a top plate is fixedly connected to the top of the strip block. Bolts are slidably fitted through the interiors of the upper and lower housings. The bolts pass through the lower housing and the upper housing in sequence and are threadedly connected to the strip block and the top plate. A tightening groove is provided at the bottom of the bolts. An installation assembly is provided between the top plate and the upper housing.

[0007] The installation assembly includes a support rod, with two fixed rods fixedly connected to the top end of the support rod. The two fixed rods are arranged in parallel and spaced apart, and both slide through the top plate and the upper housing. The strip block slides between the two fixed rods. A baffle is fixedly connected to the lower surface of each fixed rod. A connecting rod is horizontally fixedly connected to one side of the support rod. The end of the connecting rod away from the support rod extends directly below the bolt, and a tightening rod slides through this end. A tightening block that matches the tightening groove is fixedly connected to the top end of the tightening rod, and a tightening handle is fixedly connected to the bottom end of the tightening rod.

[0008] The lower surface of the upper housing and the upper surface of the lower housing are both provided with sealing grooves, and mutually compatible sealing strips are fixedly connected in the sealing grooves.

[0009] The lower housing has sliders fixedly connected symmetrically on both sides. A limit block is fixedly connected to the end of the slider away from the lower housing. The upper housing has corresponding grooves at both ends that are adapted to the sliders and limit blocks. The sliders and limit blocks are slidably embedded in the grooves.

[0010] A method for using a mountain-adaptive, precision-operated, insulating piercing clamp for ground potential control includes the following steps:

[0011] S1: Pre-operation preparation and parameter calculation: Survey the working environment and wire condition, and record the ambient temperature t; measure the diameter D and average insulation thickness T of the wire to be connected; based on the diameter D, average insulation thickness T and ambient temperature t, and combined with the preset structural parameters of the wire clamp, calculate and determine the number of turns N of the bolt.

[0012] S2: Lifting and positioning and wire clamp pre-installation: Connect the installation component to the wire clamp body, and lift the wire clamp to the predetermined installation position at high altitude using the support rod; place the two wires to be connected into the wire groove between the upper and lower shells of the wire clamp, and align the wire axis with the piercing plate;

[0013] S3: Precise tightening and piercing operation at ground potential: On the ground, insert the tightening block at the top of the tightening rod into the tightening groove at the bottom of the bolt for connection; according to the actual number of tightening turns N determined in step S1, apply rotational torque to the tightening rod to drive the bolt to rotate, thereby causing the lower housing to slide upward along the groove of the upper housing, driving the upper and lower housings to close, so that the piercing piece penetrates the insulation layer of the wire until it contacts the wire core;

[0014] S4: Installation component recovery and sealing inspection: After tightening, disconnect the tightening block from the bolt; pull out the fixing rod through the support rod and recover the installation component; check the condition of the sealing strip at the clamp housing to confirm that the seal is reliable.

[0015] S5: Connection reliability verification: Perform resistance testing on the punctured connection points to verify the reliability of the electrical connection.

[0016] The specific steps for S1 are as follows:

[0017] Operators surveyed the mountainous work area, clearing obstacles and flammable debris below the work site. They inspected the conductor surface for wear, aging, and any adhering substances. If oil, oxide layers, or sharp protrusions were present, they were gently wiped and polished with insulated cleaning tools to ensure the conductor surface was clean and dry. Simultaneously, they recorded the altitude and ambient temperature of the work site. ;

[0018] The operator is located in a safe area at ground potential and measures the diameter of the wire to be connected. The final diameter is obtained by taking the average value of three measurement points at different cross-sections of the conductor; the average thickness of the conductor insulation layer is measured. Similarly, the average value of the three measurement points is taken to ensure data accuracy;

[0019] Based on the measured parameters and the clamp structure parameters, the theoretical number of turns for tightening the bolt is calculated using a formula. The theoretical number of turns; The calculation formula is:

[0020]

[0021] in: The effective piercing height of the piercing clip is the minimum height at which the piercing clip must penetrate the insulation layer and make contact with the wire core. It is specified by the factory parameters of the clamp and is usually 0.5-1.2mm, suitable for 10-35kV conductors. A gap of 0.2-0.3mm is reserved for the closure of the upper and lower shells to compensate for the thermal expansion and contraction of the conductors caused by temperature changes in mountainous areas; The bolt pitch is determined by the bolt specifications. This is a temperature correction factor, based on the ambient temperature of the working environment. Value: When At ≤-5℃, =1.05; when -5℃ < At <35℃, =1.0; when At ≥35℃, =0.95, used to correct for the effect of temperature on the hardness of the insulation layer and the deformation of the conductor, to ensure accurate puncture depth.

[0022] The theoretical number of turns was calculated. Then, adjustments are made based on the tension of the conductors laid in mountainous areas. No additional adjustments are needed when the tension is ≤5kN, and when the tension is >5kN... Add 0.5 turns to determine the final number of turns to tighten. Reality.

[0023] The specific steps for S2 are as follows:

[0024] Pass the two fixing rods parallel through the gap between the top plate and the upper shell, so that the strip block is engaged between the two fixing rods until the baffle at the lower end of the fixing rods is in close contact with the side of the upper shell;

[0025] Operators use support rods on the ground to slowly hoist the assembled wire clamps to the designated installation position of the high-altitude conductor;

[0026] Place the two wires to be connected into the wire groove between the upper and lower housings, aligning the wire axis with the puncture patch to avoid puncture deviation.

[0027] The specific steps for S3 are as follows:

[0028] The operator pushes the tightening rod upwards from the ground, so that the tightening block at the top is fully embedded in the tightening groove at the bottom of the bolt, ensuring that the two are tightly engaged without slippage; at this time, the fixing rod restricts the displacement of the upper housing through the baffle, and the bolt position is fixed, providing a guarantee for precise tightening;

[0029] According to the actual number of tightening turns determined in step S1 In practice, a uniform rotational torque is applied to the tightening handle. The torque value is set according to the conductor specifications. The torque for a 10kV conductor is 8-12 N·m, and the torque for a 35kV conductor is 15-20 N·m. During rotation, the torque is transmitted to the bolt through the tightening rod and tightening block. Since the bolt is threaded with the strip block and the top plate, and the strip block is fixed to the upper shell, the bolt generates an upward lifting force when rotating, which pulls the lower shell to slide smoothly upward along the groove of the upper shell, thus closing the upper and lower shells.

[0030] During tightening, observe the clamp's condition to ensure the upper and lower housings close smoothly without tilting or jamming. As the housings close, the piercing tabs inside the upper and lower housings evenly approach the wire, gradually penetrating the insulation layer until reliable electrical contact is formed with the wire's metal core. At this point, a slight increase in resistance will be observed when tightening the handle. Stop tightening and record the actual number of rotations. For actual comparison, the deviation must be ≤ 0.2 laps.

[0031] The specific steps for S4 and S5 are as follows:

[0032] After tightening is complete, pull down the tightening rod to completely disengage the tightening block from the bolt's tightening groove;

[0033] Pull the fixing rod outward by supporting the rod, so that the fixing rod is pulled out in the opposite direction from the gap between the top plate and the upper shell, and the entire installation assembly is retrieved. During the retrieval process, pull and release gently to avoid the assembly from colliding with the clamps or wires, which could cause structural damage.

[0034] Observe the joint between the upper and lower housings of the clamp to ensure that the sealing strip is not turned outward or detached, and that the joint is tight without gaps. If the working environment in the mountainous area is damp, such as in rain, snow, or fog, wait 10 minutes after the operation is completed and observe the surface of the clamp again to ensure that there is no condensation or water seepage, so as to ensure reliable sealing and prevent the damp environment in the mountainous area from corroding the wire core.

[0035] The resistance test is as follows: The operator uses an insulation circuit resistance tester to measure the resistance of the wires on both sides of the puncture point at ground potential. The test value must be ≤50μΩ and the difference between the two measurements must be ≤10%, which proves that the wires are in good contact with the puncture patch and the conductive path is reliable.

[0036] Working principle:

[0037] Operators tighten bolts on the ground by installing the components—a fixing rod is inserted between the top plate and the upper shell, so that one side of the upper shell is close to the baffle to prevent slippage and fix the bolt position. This facilitates the insertion of the tightening block into the tightening groove at the bottom of the bolt. The rotational driving force is transmitted to the bolt through the tightening rod. Since the bolt is threadedly connected to the strip block and the top plate, and the strip block, the top plate and the upper shell are fixed as one unit, the bolt will generate an upward pulling force when tightened, which will drive the lower shell to rise and close the upper and lower shells relative to each other.

[0038] As the housing closes, the piercing tabs fixed inside the upper and lower housings simultaneously move towards the conductor, eventually penetrating the outer insulation layer of the conductor through mechanical pressure until they make close contact with the conductor core. This allows the conductors on both sides to form a reliable conductive path through the piercing tabs, achieving efficient power transmission. After installation, the fixing rod is pulled out in the reverse direction, and the installation assembly is retrieved.

[0039] The present invention has the following beneficial effects:

[0040] 1. Ground potential operation is safer and significantly reduces labor intensity: The installation of components enables precise ground tightening operations, eliminating the need for personnel to work at close range at heights. This avoids the risks of falls and electric shocks in steep mountain slopes and high-altitude environments. In addition, hoisting positioning and component retrieval are convenient, significantly improving work efficiency and reducing maintenance burden.

[0041] 2. High puncture accuracy and strong connection reliability: With the precise positioning of the slider and groove, and the calculation formula of the number of turns of tightening based on the wire parameters, ambient temperature and tension correction, it is ensured that the puncture piece accurately penetrates the insulation layer and makes close contact with the wire core, and the resistance test meets the standard, avoiding poor conductivity caused by puncture deviation or insufficient depth.

[0042] 3. Excellent sealing performance, suitable for harsh mountain environments: The sealing strip design of the upper and lower shells and the reserved gap for closure can effectively resist the intrusion of water vapor in humid environments such as rain, snow, and fog. At the same time, it can compensate for the thermal expansion and contraction of the conductors caused by temperature changes, reduce insulation aging, short circuit and leakage faults, and ensure the long-term stable operation of 10-35kV mountain power distribution lines. Attached Figure Description

[0043] Figure 1 This is a perspective view of a mountain-adaptive, precision-operated insulating puncture clamp for ground potential control proposed in this invention.

[0044] Figure 2 This is a bottom view of an insulating puncture clamp for precise operation of ground potential, adapted to mountainous areas, proposed in this invention.

[0045] Figure 3 This is a structural diagram of the puncture plate of an insulating puncture clamp for precise operation of ground potential in mountainous areas, as proposed in this invention.

[0046] Figure 4 This is a flowchart illustrating the usage method of a mountain-adaptive, precise ground potential operation insulation puncture clamp proposed in this invention.

[0047] Legend:

[0048] 1. Upper housing; 2. Lower housing; 3. Puncture plate; 4. Sealing strip; 5. Slider; 6. Limiting block; 7. Slide groove; 8. Strip block; 9. Top plate; 10. Bolt; 11. Fixing rod; 12. Support rod; 13. Connecting rod; 14. Tightening block; 15. Tightening rod; 16. Tightening handle; 17. Baffle; 18. Tightening groove. Detailed Implementation

[0049] The present invention will be further described in detail below with reference to specific embodiments. 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.

[0050] Example 1

[0051] A mountain-adaptive, precision-operated insulating piercing clamp for ground potential control includes an upper housing 1 and a lower housing 2. Piercing plates 3 are fixedly installed on the inner sides of the upper housing 1 and the lower housing 2. A strip block 8 is fixedly connected to the top of the upper housing 1, and a top plate 9 is fixedly connected to the top of the strip block 8. Bolts 10 are slidably fitted through the interior of the upper housing 1 and the lower housing 2. After passing through the lower housing 2 and the upper housing 1 in sequence, the bolts 10 are threadedly connected to the strip block 8 and the top plate 9. A tightening groove 18 is provided at the bottom end of the bolts 10. An installation assembly is provided between the top plate 9 and the upper housing 1.

[0052] The upper housing 1 and lower housing 2 form the core carrier for wire clamping and piercing; the piercing piece 3 fixed on the inner side provides a structural basis for conductive contact, ensuring a reliable conductive path is formed after penetrating the insulation layer. The strip block 8 and the top plate 9 form an integrated force-bearing structure, providing a stable threaded engagement support for the bolt 10, and limiting the displacement of the upper housing through cooperation with the installation components. The through-sliding and threaded connection design of the bolt 10 can convert rotational motion into axial tension, driving the upper and lower housings to close and achieve piercing; the bottom tightening groove 18 provides a torque transmission interface for ground potential operation, and the installation components between the top plate 9 and the upper housing 1 reserve space to ensure precise docking between ground operation and high-altitude clamps, structurally avoiding the safety hazards of high-altitude close-range operations in mountainous areas.

[0053] The mounting assembly includes a support rod 12, with two fixed rods 11 fixedly connected to the top of the support rod 12. The two fixed rods 11 are arranged in parallel and spaced apart, and both slide through the top plate 9 and the upper housing 1. The strip block 8 slides between the two fixed rods 11. A baffle 17 is fixedly connected to the lower surface of each fixed rod 11. A connecting rod 13 is horizontally fixedly connected to one side of the support rod 12. The end of the connecting rod 13 away from the support rod 12 extends directly below the bolt 10, and a tightening rod 15 slides through this end. A tightening block 14 that matches the tightening groove 18 is fixedly connected to the top of the tightening rod 15, and a tightening handle 16 is fixedly connected to the bottom of the tightening rod 15.

[0054] The support rod 12, as the core support component for hoisting and force transmission, enables precise hoisting and positioning of the high-altitude clamp from the ground, adapting to steep slopes and high-altitude operation scenarios in mountainous areas. Two parallel fixing rods 11, through their engagement with the strip block 8, limit the horizontal displacement of the upper housing 1. The baffle 17 further fixes the position of the upper housing, providing a stable reference for tightening the bolt 10 and preventing housing displacement from affecting piercing accuracy. The connecting rod 13 extends directly below the bolt 10, ensuring coaxial alignment of the tightening rod 15. The matching design of the tightening block 14 and the tightening groove 18 ensures slip-free torque transmission. The tightening handle 16 provides a convenient point of application for ground operators, enabling precise operation at ground potential and completely avoiding the risks of falls and electric shocks during high-altitude operations in mountainous areas.

[0055] Both the lower surface of the upper housing 1 and the upper surface of the lower housing 2 are provided with sealing grooves, and mutually compatible sealing strips 4 are fixedly connected in the sealing grooves.

[0056] Mountainous operating environments are humid, rainy, snowy, and foggy, and moisture intrusion can easily lead to wire core oxidation, short circuits, and electrical leakage. The design of the sealing groove allows the sealing strip 4 to be precisely installed. When the upper and lower shells are closed, the sealing strips are pressed together to form a sealed protective space, preventing moisture, dust, and other impurities from entering.

[0057] Slider 5 is symmetrically fixedly connected to both sides of the lower housing 2. A limit block 6 is fixedly connected to one end of the slider 5 away from the lower housing 2. Slide grooves 7 that are adapted to the slider 5 and the limit block 6 are opened at both ends of the upper housing 1. The slider 5 and the limit block 6 are slidably embedded in the slide grooves 7.

[0058] In mountainous operations, the orientation of the shell during closure directly affects puncture accuracy. The matching fit between slider 5 and groove 7 provides precise guidance for the lifting and lowering of the lower shell 2, ensuring no tilting or jamming during the closure of the upper and lower shells, and allowing the puncture tip 3 to always be aligned with the guide wire axis, avoiding puncture deviation. Limiting block 6 prevents slider 5 from falling out of groove 7, ensuring structural connection stability, and is particularly suitable for operational reliability under complex conditions such as strong winds and vibrations in mountainous areas. The mechanical positioning structure improves the consistency and accuracy of punctures.

[0059] Example 2

[0060] A method for using a mountain-adaptive, precision-operated, insulating piercing clamp for ground potential control includes the following steps:

[0061] S1: Pre-operation preparation and parameter calculation: Survey the working environment and wire condition, and record the ambient temperature t; measure the diameter D and average insulation thickness T of the wire to be connected; based on the diameter D, average insulation thickness T and ambient temperature t, and combined with the preset structural parameters of the wire clamp, calculate and determine the number of turns N of bolt 10.

[0062] S2: Lifting and positioning and wire clamp pre-installation: Connect the installation component to the wire clamp body, and lift the wire clamp to the predetermined installation position at high altitude using the support rod 12; place the two wires to be connected into the wire groove between the upper and lower shells of the wire clamp, and align the wire axis with the piercing piece 3;

[0063] S3: Precise tightening and piercing operation at ground potential: On the ground, insert the tightening block 14 at the top of the tightening rod 15 into the tightening groove 18 at the bottom of the bolt 10 for connection; according to the actual number of tightening turns N determined in step S1, apply rotational torque to the tightening rod 15 to drive the bolt 10 to rotate, thereby causing the lower housing 2 to slide upward along the sliding groove 7 of the upper housing 1, driving the upper and lower housings to close, so that the piercing piece 3 penetrates the wire insulation layer until it contacts the wire core;

[0064] S4: Installation component recovery and sealing inspection: After the tightening operation is completed, disconnect the connection between the tightening block 14 and the bolt 10; pull out the fixing rod 11 through the support rod 12 and recover the installation component; check the condition of the sealing strip 4 at the clamp housing to confirm that the seal is reliable.

[0065] S5: Connection reliability verification: Perform resistance testing on the punctured connection points to verify the reliability of the electrical connection.

[0066] The specific steps for S1 are as follows:

[0067] Operators surveyed the mountainous work area, clearing obstacles and flammable debris below the work site. They inspected the conductor surface for wear, aging, and any adhering substances. If oil, oxide layers, or sharp protrusions were present, they were gently wiped and polished with insulated cleaning tools to ensure the conductor surface was clean and dry. Simultaneously, they recorded the altitude and ambient temperature of the work site. ;

[0068] The operator is located in a safe area at ground potential and measures the diameter of the wire to be connected. The final diameter is obtained by taking the average value of three measurement points at different cross-sections of the conductor; the average thickness of the conductor insulation layer is measured. Similarly, the average value of the three measurement points is taken to ensure data accuracy;

[0069] Based on the measurement parameters and the wire clamp structural parameters, the theoretical number of turns for bolt 10 is calculated using a formula. Theoretical number of turns The calculation formula is:

[0070]

[0071] in: The effective piercing height of piercing piece 3 is the minimum height at which the piercing piece must penetrate the insulation layer and contact the wire core. It is specified by the factory parameters of the clamp and is usually 0.5-1.2mm, suitable for 10-35kV conductors. A gap of 0.2-0.3mm is reserved for the closure of the upper and lower shells to compensate for the thermal expansion and contraction of the conductors caused by temperature changes in mountainous areas; The pitch of bolt 10 is determined by the bolt specification; This is a temperature correction factor, based on the ambient temperature of the working environment. Value: When At ≤-5℃, =1.05; when -5℃ < At <35℃, =1.0; when At ≥35℃, =0.95, used to correct for the effect of temperature on the hardness of the insulation layer and the deformation of the conductor, to ensure accurate puncture depth.

[0072] The theoretical number of turns was calculated. Then, adjustments are made based on the tension of the conductors laid in mountainous areas. No additional adjustments are needed when the tension is ≤5kN, and when the tension is >5kN... Add 0.5 turns to determine the final number of turns to tighten. Reality.

[0073] Mountainous work sites often have numerous obstacles, and conductors are prone to surface defects due to environmental erosion. Clearing obstacles avoids the risk of falling objects during operations, while polishing the conductor surface removes impurities that could affect conductive contact, ensuring reliable contact between the piercing tab and the conductor core. Ground potential measurement prevents the risk of electric shock to operators, and averaging three measurement points can offset errors caused by uneven conductor cross-sections, improving parameter accuracy. The theoretical tightening turn formula integrates conductor specifications, piercing requirements, and the influence of ambient temperature, specifically correcting for differences in insulation hardness and conductor deformation caused by temperature variations in mountainous areas. Tension correction adapts to the potentially high tension conditions that may occur during conductor laying in mountainous areas, preventing excessive tension from causing insufficient shell closure, ensuring accurate piercing depth, and guaranteeing connection reliability from the source.

[0074] The specific steps for S2 are as follows:

[0075] Two fixing rods 11 are passed parallel to each other through the gap between the top plate 9 and the upper shell 1, so that the strip block 8 is engaged between the two fixing rods until the baffle 17 at the lower end of the fixing rod 11 is in close contact with the side of the upper shell 1.

[0076] The operator uses support rod 12 on the ground to slowly hoist the assembled wire clamp to the predetermined installation position of the high-altitude conductor;

[0077] Place the two wires to be connected into the wire groove between the upper and lower housings, aligning the wire axis with the puncture patch 3 to avoid puncture deviation.

[0078] The specific steps for S3 are as follows:

[0079] The operator pushes the tightening rod 15 upward on the ground, so that the tightening block 14 at the top is fully embedded in the tightening groove 18 at the bottom of the bolt 10, ensuring that the two are tightly engaged without slippage; at this time, the fixing rod 11 restricts the displacement of the upper housing 1 through the baffle 17, and the position of the bolt 10 is fixed, providing a guarantee for precise tightening.

[0080] According to the actual number of tightening turns determined in step S1 In practice, a uniform rotational torque is applied to the tightening handle 16. The torque value is set according to the conductor specifications. The torque for a 10kV conductor is 8-12 N·m, and the torque for a 35kV conductor is 15-20 N·m. During rotation, the torque is transmitted to the bolt 10 through the tightening rod 15 and the tightening block 14. Since the bolt is threadedly engaged with the strip block 8 and the top plate 9, and the strip block 8 is fixed to the upper shell 1, the bolt generates an upward lifting force when rotating, which pulls the lower shell 2 to slide smoothly upward along the slide groove 7 of the upper shell 1, thereby closing the upper and lower shells.

[0081] During tightening, observe the clamp status to ensure the upper and lower housings close without tilting or jamming. As the housings close, the piercing plates 3 on the inner sides of the upper and lower housings approach the wire evenly, gradually penetrating the insulation layer until reliable electrical contact is formed with the metal core of the wire. At this point, a slight increase in damping will occur when tightening the handle 16. Stop tightening and record the actual number of rotations. For actual comparison, the deviation must be ≤ ±0.2 revolutions.

[0082] The complete engagement of the tightening block 14 and the tightening groove 18 ensures lossless torque transmission, prevents slippage due to vibration during mountain operations, and guarantees tightening accuracy. The limiting effect of the fixing rod 11 and the baffle 17 fixes the upper housing 1. When the bolt 10 rotates, it only generates axial tension, which is converted into the lifting power of the lower housing 2. The guiding effect of the sliding groove 7 ensures that the housing closes smoothly without tilting or jamming. The torque is set for different voltage wires because the wire specifications, insulation thickness, and core strength are different. The appropriate torque can avoid insufficient piercing due to insufficient torque or damage to the core due to excessive torque. Observing the state and comparing the number of turns during tightening can correct operational deviations in time, ensure that the piercing depth meets the requirements, adapt to the precise operation needs in the complex mountain environment, and ultimately achieve reliable electrical contact between the piercing plate and the core.

[0083] The specific steps for S4 and S5 are as follows:

[0084] After the tightening operation is completed, pull down the tightening rod 15 to completely disengage the tightening block 14 from the tightening groove 18 of the bolt 10;

[0085] Pull the fixing rod 11 outward by supporting rod 12, so that the fixing rod is pulled out in the opposite direction from the gap between the top plate 9 and the upper shell 1, and the entire installation assembly is retrieved; during the retrieval process, pull and release gently to avoid the assembly from colliding with the clamps or wires and causing structural damage.

[0086] Observe the joint between the upper and lower housings of the clamp to ensure that the sealing strip 4 is not turned outward or detached, and that it is tightly fitted without gaps. If the working environment in the mountainous area is damp, such as in rain, snow, or fog, wait 10 minutes after the operation is completed and then observe the surface of the clamp again to ensure that there is no condensation or water seepage, so as to ensure reliable sealing and prevent the damp environment in the mountainous area from corroding the wire core.

[0087] The resistance test is as follows: The operator uses an insulation circuit resistance tester to measure the resistance of the wires on both sides of the puncture point at ground potential. The test value must be ≤50μΩ and the difference between the two measurements must be ≤10%, which proves that the wires are in good contact with the puncture patch and the conductive path is reliable.

[0088] The design of the detachment of the tightening block 14 and the retraction of the fixing rod 11 allows for the reuse of installation components, reducing operating costs. Gentle pulling and releasing prevents damage to the clamp housing or wire displacement due to component collisions in high-altitude mountainous environments, ensuring that completed piercing connections remain unaffected. The sealing check addresses the harsh environment of humid, rainy, and snowy mountainous areas. A normal sealing strip ensures effective airtight protection. A re-check after 10 minutes in humid weather verifies the sealing stability under temperature and humidity changes, preventing condensation and water seepage from corroding the wire core. Resistance testing is a crucial step in directly verifying the reliability of electrical connections. Setting a test value of ≤50μΩ and a difference requirement of ≤10% ensures sufficient contact between the piercing plate and the wire core, resulting in low and stable conductivity resistance. This prevents overheating and malfunctions due to poor contact, meeting the long-term stable operation requirements of power distribution lines in mountainous areas.

[0089] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is 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 mountain-adaptive, precision-operated, insulating piercing clamp for ground potential control, comprising an upper housing (1) and a lower housing (2), characterized in that: Puncture plates (3) are fixedly installed on the inner sides of the upper shell (1) and the lower shell (2). A strip block (8) is fixedly connected to the top of the upper shell (1). A top plate (9) is fixedly connected to the top of the strip block (8). Bolts (10) are slidably fitted through the interior of the upper shell (1) and the lower shell (2). After the bolts (10) pass through the lower shell (2) and the upper shell (1) in sequence, they are threadedly connected to the strip block (8) and the top plate (9). A tightening groove (18) is opened at the bottom end of the bolts (10). An installation assembly is provided between the top plate (9) and the upper shell (1).

2. The mountain-adaptive, precision-operated, insulating piercing clamp for ground potential control according to claim 1, characterized in that: The installation assembly includes a support rod (12), the top of which is fixedly connected to two fixing rods (11). The two fixing rods (11) are arranged in parallel and spaced apart, and both slide between the top plate (9) and the upper shell (1). The strip block (8) slides between the two fixing rods (11). A baffle (17) is fixedly connected to the lower surface of each fixing rod (11). A connecting rod (13) is fixedly connected to one side of the support rod (12). The end of the connecting rod (13) away from the support rod (12) extends to the bolt (10) directly below, and a tightening rod (15) slides through this end. A tightening block (14) that matches the tightening groove (18) is fixedly connected to the top of the tightening rod (15). A tightening handle (16) is fixedly connected to the bottom of the tightening rod (15).

3. The mountain-adaptive, precision-operated, insulating piercing clamp for ground potential control according to claim 1, characterized in that: The lower surface of the upper shell (1) and the upper surface of the lower shell (2) are both provided with sealing grooves, and mutually compatible sealing strips (4) are fixedly connected in the sealing grooves.

4. The mountain-adaptive, precision-operated, insulating piercing clamp for ground potential control according to claim 1, characterized in that: The lower housing (2) is symmetrically fixedly connected to two sides of a slider (5). A limiting block (6) is fixedly connected to one end of the slider (5) away from the lower housing (2). The upper housing (1) is provided with corresponding grooves (7) that are compatible with the slider (5) and the limiting block (6). The slider (5) and the limiting block (6) are slidably embedded in the groove (7).

5. A method for using a mountain-adaptive, precision-operated, insulating piercing clamp for ground potential control, characterized in that: Includes the following steps: S1: Preparatory work and parameter calculation: Survey the working environment and wire condition, and record the ambient temperature t; Measure the diameter D and average insulation thickness T of the wire to be connected; Based on the diameter D, average insulation thickness T and ambient temperature t, and combined with the preset structural parameters of the wire clamp, calculate and determine the number of turns N of the bolt (10) tightened. S2: Lifting and positioning and wire clamp pre-installation: Connect the installation components to the wire clamp body and lift the wire clamp to the predetermined installation position at high altitude using the support rod (12); place the two wires to be connected into the wire groove between the upper and lower shells of the wire clamp, and align the wire axis with the piercing plate (3); S3: Precise tightening and piercing operation at ground potential: On the ground, insert the tightening block (14) at the top of the tightening rod (15) into the tightening groove (18) at the bottom of the bolt (10) for connection; according to the actual number of tightening turns N determined in step S1, apply rotational torque to the tightening rod (15) to drive the bolt (10) to rotate, so that the lower housing (2) slides upward along the groove (7) of the upper housing (1), driving the upper and lower housings to close, so that the piercing piece (3) penetrates the wire insulation layer until it contacts the wire core; S4: Installation component recycling and sealing inspection: After the tightening operation is completed, disconnect the connection between the tightening block (14) and the bolt (10); pull out the fixing rod (11) through the support rod (12) and recycle the installation component; check the condition of the sealing strip (4) at the clamp housing to confirm that the seal is reliable; S5: Connection reliability verification: Perform resistance testing on the punctured connection points to verify the reliability of the electrical connection.

6. The method of using a mountain-adaptive, precise ground potential operation insulation piercing clamp according to claim 5, characterized in that: The specific steps for S1 are as follows: Operators surveyed the mountainous work area, clearing obstacles and flammable debris below the work site. They inspected the conductor surface for wear, aging, and any adhering substances. If oil, oxide layers, or sharp protrusions were present, they were gently wiped and polished with insulated cleaning tools to ensure the conductor surface was clean and dry. Simultaneously, they recorded the altitude and ambient temperature of the work site. ; The operator is located in a safe area at ground potential and measures the diameter of the wire to be connected. The final diameter is obtained by taking the average value of three measurement points at different cross-sections of the conductor; the average thickness of the conductor insulation layer is measured. Similarly, the average value of the three measurement points is taken to ensure data accuracy; Based on the measurement parameters and the wire clamp structure parameters, the theoretical number of turns of bolt (10) is calculated using the formula. ; The theoretical number of turns was calculated. Then, adjustments are made based on the tension of the conductors laid in mountainous areas. No additional adjustments are needed when the tension is ≤5kN, and when the tension is >5kN... Add 0.5 turns to determine the final number of turns to tighten. Reality.

7. The method of using a mountain-adaptive, precise ground potential operation insulation piercing clamp according to claim 5, characterized in that: The specific steps for S2 are as follows: Two fixing rods (11) are passed parallel to each other through the gap between the top plate (9) and the upper shell (1), so that the strip block (8) is engaged between the two fixing rods until the baffle (17) at the lower end of the fixing rod (11) is tightly attached to the side of the upper shell (1). The operator slowly hoisted the assembled wire clamp to the predetermined installation position of the high-altitude conductor using the support rod (12) on the ground; Place the two wires to be connected into the wire groove between the upper and lower shells respectively, so that the wire axis is aligned with the puncture piece (3) to avoid puncture deviation.

8. The method of using a mountain-adaptive, precise ground potential operation insulation piercing clamp according to claim 5, characterized in that: The specific steps for S3 are as follows: The operator pushes the tightening rod (15) upward on the ground so that the tightening block (14) at the top is fully embedded in the tightening groove (18) at the bottom of the bolt (10), ensuring that the two are tightly engaged without slippage; at this time, the fixing rod (11) restricts the displacement of the upper housing (1) through the baffle (17), and the position of the bolt (10) is fixed, providing a guarantee for precise tightening; According to the actual number of tightening turns determined in step S1 In practice, a uniform rotational torque is applied to the tightening handle (16). The torque value is set according to the conductor specification. The torque for a 10kV conductor is 8-12 N·m, and the torque for a 35kV conductor is 15-20 N·m. During the rotation, the torque is transmitted to the bolt (10) through the tightening rod (15) and the tightening block (14). Since the bolt is threaded with the strip block (8) and the top plate (9), and the strip block (8) is fixed to the upper shell (1), the bolt generates an upward lifting force when it rotates, which pulls the lower shell (2) to slide smoothly upward along the groove (7) of the upper shell (1) to achieve the closure of the upper and lower shells. During the tightening process, observe the state of the clamp to ensure that the upper and lower housings are closed without tilting or jamming. As the housings close, the piercing plates (3) on the inner sides of the upper and lower housings approach the wire evenly, gradually penetrating the insulation layer until reliable electrical contact is formed with the metal core of the wire. At this time, a slight increase in damping will occur when tightening the handle (16). Stop tightening and record the actual number of rotations. For actual comparison, the deviation must be ≤ 0.2 laps.

9. The method of using a mountain-adaptive, precise ground potential operation insulation piercing clamp according to claim 5, characterized in that: The specific steps for S4 and S5 are as follows: After the tightening operation is completed, pull down the tightening rod (15) to make the tightening block (14) completely disengage from the tightening groove (18) of the bolt (10). Pull the fixing rod (11) outward by supporting rod (12) so that the fixing rod is pulled out in the opposite direction from the gap between the top plate (9) and the upper shell (1) to recycle the entire installation assembly; pull and release gently during the recycling process to avoid the assembly from colliding with the clamps or wires and causing structural damage; Observe the joint between the upper and lower shells of the clamp to ensure that the sealing strip (4) is not turned outward or detached, and is tightly fitted without gaps; if there is rain, snow, fog or other humid weather in the mountainous working environment, wait 10 minutes after the operation is completed and observe the surface of the clamp again to ensure that there is no condensation or water seepage, and ensure that the seal is reliable and prevent the humid environment in the mountainous area from corroding the wire core. The resistance test is as follows: The operator uses an insulation circuit resistance tester to measure the resistance of the wires on both sides of the puncture point at ground potential. The test value must be ≤50μΩ and the difference between the two measurements must be ≤10%, which proves that the wires are in good contact with the puncture patch and the conductive path is reliable.

10. The method of using a mountain-adaptive, precise ground potential operation insulation piercing clamp according to claim 6, characterized in that: The theoretical number of tightening turns The calculation formula is: in: The effective piercing height of the piercing piece (3) is the minimum height at which the piercing piece needs to penetrate the insulation layer and contact the wire core. It is specified by the factory parameters of the clamp and is usually 0.5-1.2mm, suitable for 10-35kV conductors. A gap of 0.2-0.3mm is reserved for the closure of the upper and lower shells to compensate for the thermal expansion and contraction of the conductors caused by temperature changes in mountainous areas; The pitch of the bolt (10) is determined by the bolt specification; This is a temperature correction factor, based on the ambient temperature of the working environment. Value: When At ≤-5℃, =1.05; when -5℃ < At <35℃, =1.0; when At ≥35℃, =0.95, used to correct for the effect of temperature on the hardness of the insulation layer and the deformation of the conductor, to ensure accurate puncture depth.

Images