Strain clamp for anti-freezing and anti-bulging wire and crimping method of strain clamp for anti-freezing and anti-bulging wire

Abstract

The invention discloses a strain clamp for an anti-freezing and anti-bulging wire and a crimping method thereof, the strain clamp for the wire is used for crimping with the wire, the wire comprises an outer layer aluminum wire and an inner layer wire core, the strain clamp for the wire at least comprises a strain clamp aluminum pipe, a strain clamp steel anchor and a strain clamp liner pipe, the strain clamp aluminum pipe is of a hollow tubular structure, and the strain clamp steel anchor is of a hollow tubular structure. The strain clamp steel anchor is arranged in the strain clamp aluminum pipe to allow a wire to penetrate from the first end of the strain clamp aluminum pipe, the strain clamp steel anchor comprises a pull ring part, a connecting part and a crimping part which are sequentially connected, the pull ring part is located outside the strain clamp aluminum pipe, the crimping part and the connecting part are installed at the second end of the strain clamp aluminum pipe, the crimping part is of a hollow tubular structure, and an opening is formed in the end of the crimping part. And the strain clamp liner tube is arranged on the periphery of the crimping part in a sleeving manner, and is filled in an internal gap area between the strain clamp aluminum tube and the crimping part. The strain clamp can prevent water from entering a non-pressing area of the strain clamp of a lead of an overhead power transmission line in an upside-down hanging state to cause freezing and bulging.

Description

Technical Field

[0001] The invention relates to the technical field of overhead power transmission lines, and in particular to a tension clamp for an anti-freezing and bulging conductor and a crimping method thereof. Background Art

[0002] During the operation of overhead transmission lines, it was found that the conductor tension clamps of the lines in icing-prone areas were generally bulging in the non-pressed areas at the tower locations where the conductor tension clamps were in an inverted state.

[0003] In response to the phenomenon of bulging in the non-pressing area of ​​the conductor tension clamp, the main technical measures currently taken are to fill the internal gaps of the non-pressing area with liquid materials (oil esters), that is, to drill holes in the non-pressing area of ​​the conductor tension clamp, inject liquid materials (grease) to fill the internal gaps of the non-pressing area, and then seal the holes with screws. However, after the above measures were implemented and operated for a period of time, it was found that grease leakage occurred at the sealing of the grease injection holes of the conductor tension clamps that had been filled with liquid materials (grease) in the non-pressing area. After years of operation, it was found that some of the non-pressing areas of the tension clamps that had been filled with liquid materials (grease) still bulged.

[0004] Therefore, how to prevent water from entering the non-pressed area of ​​the tension clamp of the conductor in an inverted state of the overhead transmission line, causing freezing and swelling, so as to ensure the safe operation of the transmission line is a technical problem that urgently needs to be solved in this field. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a tension clamp for anti-freezing and bulging conductors, which can prevent the phenomenon of freezing and bulging caused by water entering the non-pressed area of ​​the tension clamp of the conductor in an inverted state of the overhead transmission line, thereby ensuring the safe operation of the transmission line.

[0006] Another object of the present invention is to provide a method for crimping a tension clamp for an anti-freezing bulging conductor.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A tension clamp for an anti-freezing and bulging conductor, used for crimping with a conductor, wherein the conductor comprises an outer aluminum wire and an inner wire core, and the tension clamp for the conductor comprises at least:

[0009] A tension clamp aluminum tube, wherein the tension clamp aluminum tube is a hollow tubular structure to accommodate the wire passing through the first end of the tension clamp aluminum tube and is connected with a guide plate;

[0010] A tension wire clamp steel anchor, the tension wire clamp steel anchor comprising a pull ring portion, a connecting portion and a crimping portion connected in sequence, the pull ring portion being located outside the tension wire clamp aluminum tube, the crimping portion and the connecting portion being installed at the second end of the tension wire clamp aluminum tube, the crimping portion being a hollow tubular structure, and an opening being provided at the end of the crimping portion for installing the inner wire core of the conductor;

[0011] The tension clamp liner is sleeved on the outer periphery of the crimping portion and fills the internal gap area between the tension clamp aluminum tube and the crimping portion.

[0012] Optionally, gel is also filled between the tension clamp liner and the crimping portion, and between the tension clamp liner and the tension clamp aluminum tube.

[0013] Optionally, the inner core is made of a plurality of galvanized steel strands, or an aluminum alloy strand;

[0014] The outer aluminum wire is made of concentric spirally twisted multi-layer hard aluminum wires.

[0015] Optionally, the tension clamp liner includes a first liner and a second liner, the cross-sections of the first liner and the second liner are both semicircular, and the first liner and the second liner are a hollow tubular structure after being assembled.

[0016] Optionally, the inner walls of the first liner and the second liner are both provided with grooves, and the grooves penetrate along the length direction of the tension clamp liner;

[0017] The grooves are multiple and are evenly arranged along the inner wall of the tension clamp liner.

[0018] Optionally, the depth of the groove is 1.5 mm-2.5 mm, and the width of the groove is 2.5 mm-3.5 mm.

[0019] Optionally, the inner diameter of the tension clamp liner is the same as the outer diameter of the crimping portion, and the outer diameter of the tension clamp liner is 0.2 mm-0.8 mm smaller than the inner diameter of the tension clamp aluminum tube.

[0020] A method for crimping a tension clamp for an anti-freezing and bulging conductor, which is applied to a tension clamp for an anti-freezing and bulging conductor as described in any one of the above, comprises the following steps:

[0021] S100: stripping the outer aluminum wire of the first end of the conductor to expose the inner wire core;

[0022] S200: inserting the first end of the conductor into the tension clamp aluminum tube until all the inner wire cores are exposed and then the insertion stops;

[0023] S300: inserting the inner wire core into the pipe opening of the crimping part of the tension wire clamp steel anchor until it contacts the bottom of the pipe, and applying pressure;

[0024] S400: Wrapping the tension clamp liner tube around the outer periphery of the crimping portion of the tension clamp steel anchor, and moving the tension clamp aluminum tube so that the tension clamp liner tube is placed inside the tension clamp aluminum tube;

[0025] S500: locating the position of the tension clamp aluminum tube on the conductor, determining the pressure area of ​​the tension clamp aluminum tube, and marking it;

[0026] S600: Apply pressure to the pressure area of ​​the tension clamp aluminum tube.

[0027] Optionally, the following steps are further included between step S300 and step S400:

[0028] The inner wall and the outer wall of the tension clamp liner are coated with gel, so that the internal gap area formed after the tension clamp aluminum tube is threaded is filled with the tension clamp liner and the gel.

[0029] Optionally, the step S500 specifically includes:

[0030] S501: Mark B on the limit position of the tension clamp steel anchor that the tension clamp aluminum tube can reach;

[0031] S502: Mark C at the root of the crimping portion, and mark C1 at the length of BC + Zmm measured from the second end of the tension clamp aluminum tube, and record it as L3, where 8mm≤Zmm≤12mm;

[0032] Measure the length of BN and record it as L 4， Mark E at the position of the tension clamp aluminum tube corresponding to the mark N;

[0033] S503: loosen the binding wire at the mark P, push the tension clamp aluminum tube, so that the second end of the tension clamp aluminum tube coincides with the mark B, and mark D is made at the port position of the first end of the tension clamp aluminum tube, and the mark D is located on the conductor;

[0034] S504: Measure the length L5 from the mark D toward the second end of the conductor, mark D1, move the tension clamp aluminum tube from the mark D to the mark D1, and mark B1 at the port at the second end of the tension clamp aluminum tube to achieve pre-biasing of the tension clamp aluminum tube, and the mark B1 is located on the tension clamp steel anchor.

[0035] The length L5 measured from the mark D toward the second end of the conductor is the reserved crimping elongation margin for the inverted tension clamp, and the L5 value is determined by the tension clamp crimping test.

[0036] Optionally, the length from the mark C1 to the mark C is Zmm, wherein 8mm≤Zmm≤12mm, i.e., when the second end of the tension clamp aluminum tube is crimped, it penetrates into the filling area by Zmm to fix the liner filled therein by crimping.

[0037] Optionally, the step S600 includes:

[0038] S601: Check whether the first end of the tension clamp aluminum tube coincides with the mark D1, and whether the second end of the tension clamp aluminum tube coincides with the mark B1. If they coincide, proceed to step S602; if they do not coincide, readjust the position of the tension clamp aluminum tube; and at the same time check whether the mark C1 and the mark E are marked. If they are marked, proceed to step S602; if they are not marked, re-mark them;

[0039] S602: applying pressure from the first end of the tension clamp to the mark E one by one;

[0040] S603: Apply pressure from the mark C1 to the second end of the tension clamp aluminum tube.

[0041] It can be seen from the above technical scheme that, compared with the prior art, the anti-freezing and bulging conductor tension clamp disclosed in the embodiment of the present invention, since the internal gaps in the non-pressed area are filled with the solid material tension clamp liner, rainwater or water vapor cannot enter the internal gaps in the non-pressed area, and at the same time, the possibility of the filler being repelled by water seepage and freezing is avoided, effectively eliminating the hidden danger of freezing and bulging caused by water ingress in the non-pressed area of ​​the tension clamp for conductors in an inverted state, thereby effectively ensuring the safe operation of the transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0043] Figure 1 It is a schematic diagram of the structure of the wire tension clamp disclosed in the prior art after crimping;

[0044] Figure 2 It is a schematic diagram of the structure of the wire tension clamp after crimping according to the embodiment of the present invention;

[0045] Figure 3It is a front view of the tension clamp liner disclosed in an embodiment of the present invention;

[0046] Figure 4 A side view of a tension clamp liner disclosed in an embodiment of the present invention;

[0047] Figure 5 for Figure 4 The enlarged view of the M in the middle;

[0048] Figure 6 It is a front view of the tension wire clamp steel anchor disclosed in an embodiment of the present invention;

[0049] Figure 7 It is a schematic diagram of the structure after wire stripping disclosed in an embodiment of the present invention;

[0050] Figure 8 It is a schematic structural diagram of the inner core wire of the conductor disclosed in the embodiment of the present invention penetrating into the tension clamp steel anchor;

[0051] Fig. 9 It is a structural schematic diagram of the pressure application sequence of the tension wire clamp steel anchor disclosed in an embodiment of the present invention;

[0052] Fig.10 It is a schematic diagram of the structure of the tension clamp aluminum tube before pre-deflection during tube insertion disclosed in an embodiment of the present invention;

[0053] Fig.11 It is a schematic diagram of the structure of the tension clamp aluminum tube after pre-biasing through the tube disclosed in an embodiment of the present invention;

[0054] Fig.12 It is a schematic diagram of the cross-sectional structure of the non-pressed area of ​​the tension clamp aluminum tube after the tube is passed through the tube according to the embodiment of the present invention;

[0055] Fig.13 This is a schematic diagram of the pressure-applying sequence on the tension clamp aluminum tube disclosed in an embodiment of the present invention.

[0056] The names of the components are as follows:

[0057] 01. Aluminum tube for tension clamp; 02. Steel anchor for tension clamp; 03. Non-pressurized area; 04. Gap; 05. Conductor;

[0058] 100, aluminum tube for tension clamp; 200, steel anchor for tension clamp; 201, ring-pulling portion; 202, connecting portion; 203, crimping portion; 300, liner for tension clamp; 301, first liner; 302, second liner; 303, groove; 400, conductor; 401, inner wire core; 500, gel; 600, non-pressing area. DETAILED DESCRIPTION

[0059] During the operation of overhead transmission lines, in areas prone to icing, the line conductor tension clamps are in an inverted state (the conductor tension clamps are in an inverted state, and after the guide wire is hung, the aluminum tube mouth of the steel anchor end of the conductor tension clamp is lower than the aluminum tube mouth of the conductor end). It was found that the conductor tension clamps in the inverted state generally have bulging in the non-pressed area.

[0060] Through water seepage freezing test and anatomical analysis, it is concluded that the reason for the bulging of the tension clamp is that there is still a gap between the aluminum strands of the conductor after they are crimped in the crimping area of ​​the aluminum tube. Figure 1 Because the tension clamp is upside down, rainwater enters the internal gap of the non-compression zone along the seepage channel formed by the tiny gap between the front wire strands of the tension clamp. Since the connection part of the tension clamp steel anchor 02 and the crimping part of the tension clamp aluminum tube 01 are equipped with multiple grooves, the tension clamp aluminum tube 01 is put on and compacted to form a sealed state. Therefore, the water in the internal gap 04 of the non-compression zone 03 of the tension clamp cannot flow out. After a long time, the gap 04 inside the non-compression zone 03 of the tension clamp will be basically filled with accumulated water. When encountering low temperature and freezing weather, the accumulated water freezes into ice. Since the density of ice is lower than that of water, the volume of water expands when it freezes, causing the aluminum tube in the non-compression zone to swell and deform. Although the swelling deformation caused by each freezing is small, multiple water ingress and freezing will cause the swelling plastic deformation to increase gradually, and the swelling deformation accumulates and becomes larger until cracks are generated.

[0061] In order to prevent rainwater from entering the gap 04 inside the non-compression zone 03 of the tension clamp, the current power grid company has adopted anti-freezing and swelling measures for the inverted conductor tension clamp by filling the non-compression zone with liquid material (grease), that is, drilling holes in the non-compression zone of the conductor tension clamp, injecting liquid material (grease) to fill the internal gap of the non-compression zone. However, after the implementation of the anti-freezing and swelling measures of filling the non-compression zone of the tension clamp with liquid material (grease), it was found that when the line was shut down for maintenance, grease leakage occurred at the sealing of the grease injection holes of some conductor tension clamps that had been filled with liquid material (grease) in the non-compression zone. After years of operation, it was found that the non-compression zone of some tension clamps that had been filled with liquid material (grease) still swelled.

[0062] There are two main reasons for this: First, after the oil filling hole is sealed, the uneven thermal expansion and contraction will cause a tiny gap at the oil filling hole seal. Therefore, the internal grease often leaks out from the oil filling hole seal of the drilled and greased tension clamp of the put into operation line; Second, the drilled and greased tension clamp of the put into operation line still bulges. The reason is analyzed that the gap 04 inside the non-compression area 03 was not completely filled during drilling and grease injection, or the subsequent grease leaked or volatilized, a small amount of rainwater would penetrate into the non-compression area 03, and the freezing and expansion of the rainwater would squeeze the grease out of the non-compression area 03 through the gap between the aluminum strands. The reciprocating cycle will cause more and more rain in the non-compression area 03 of the tension clamp, which will eventually lead to the freezing and bulging of the tension clamp.

[0063] Frozen bulging of the conductor tension clamp will cause deformation of the aluminum tube and reduce the tensile strength of the tension clamp. On the other hand, long-term operation will cause rust in the crimping part of the conductor tension clamp steel anchor 02 and the inner core (steel strand) of the conductor 05. In particular, the tension clamp that swells to the point where the aluminum tube 01 of the tension clamp cracks will make it easier for oxygen to enter the non-pressed area 03 of the tension clamp, thereby accelerating the rust progress of the crimping part of the tension clamp steel anchor 02 and the inner core (steel strand) of the conductor in the non-pressed area 03, affecting the mechanical strength and service life of the tension clamp. In severe cases, the tension clamp may break or the conductor may fall.

[0064] It should be noted that the conductor tension clamp is used for the installation of conductor 05, wherein conductor 05 can be a conductor with a larger cross-sectional area or a conductor with a smaller cross-sectional area. However, for conductors with a smaller cross-sectional area, there are few cases of freezing and swelling in the non-pressed area 03, while for conductors with a cross-sectional area of ​​400mm 2 Above, especially the cross-sectional area of ​​630mm 2 If the above wires are not compressed, they will often freeze and swell.

[0065] In view of this, the core of the present invention is to provide a tension clamp for anti-freezing and bulging conductors, which can prevent the phenomenon of freezing and bulging caused by water entering the non-pressed area of ​​the tension clamp of the conductor in an inverted state of the overhead transmission line, thereby effectively ensuring the safe operation of the transmission line.

[0066] Another core of the present invention is to provide a method for crimping a tension clamp for an anti-freezing bulging conductor.

[0067] 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. Please refer to Figures 2 to 13 .

[0068] Please refer to Figure 2 and Figure 6The anti-freezing and bulging wire tension clamp disclosed in the embodiment of the present invention is used for crimping with the wire 400, the wire 400 includes an outer aluminum wire and an inner wire core 401, wherein the wire tension clamp includes at least a tension clamp aluminum tube 100, a tension clamp steel anchor 200 and a tension clamp liner 300, wherein the tension clamp aluminum tube 100 is a hollow tubular structure to accommodate the wire 400 from the first end of the tension clamp aluminum tube 100; the tension clamp steel anchor 200 includes a pull ring portion 201, a connection portion 202, and a tension clamp liner 300 connected in sequence. The pull ring portion 201 is located outside the tension clamp aluminum tube 100, the crimping portion 203 and the connecting portion 202 are installed on the second end of the tension clamp aluminum tube 100, the crimping portion 203 is a hollow tubular structure, and the end of the crimping portion 203 is provided with an opening to install the inner wire core 401 of the conductor 400; the tension clamp liner 300 is sleeved on the outer periphery of the crimping portion 203, and fills the internal gap area between the tension clamp aluminum tube 100 and the crimping portion 203 of the tension clamp steel anchor 200.

[0069] Compared with the prior art, the anti-freezing and bulging tension clamp for conductors disclosed in the embodiment of the present invention has an internal void area of ​​the non-pressed zone 600 between the tension clamp aluminum tube 100 and the crimping part 203 filled with the tension clamp liner 300. Therefore, rainwater or water vapor cannot enter the non-pressed zone 600, thereby avoiding the occurrence of freezing and bulging caused by water ingress into the non-pressed zone 600 of the tension clamp for conductors in an inverted state, thereby effectively ensuring the safe operation of the transmission line. In addition, the tension clamp for conductors also has technical advantages such as reliable performance, simple operation and low cost.

[0070] It should be noted that the tension clamp aluminum tube 100 is also connected to a guide plate 700 for conducting current.

[0071] Since the tension clamp aluminum tube 100, the crimping part 203 of the tension clamp steel anchor 200 and the tension clamp liner 300 may have processing errors during processing and manufacturing, there may still be some small gaps between the tension clamp aluminum tube 100 and the crimping part 203, and between the tension clamp liner 300 and the tension clamp aluminum tube 100. Therefore, gel 500 is also filled between the tension clamp liner 300 and the crimping part 203, and between the tension clamp liner 300 and the tension clamp aluminum tube 100. Such a configuration can further improve the sealing of the internal gap area and further prevent rainwater or water vapor from entering the internal gap area.

[0072] The gel 500 disclosed in the embodiment of the present invention should be a material that does not corrode aluminum, iron, zinc or react chemically therewith, and can maintain chemical stability in a high voltage electric field.

[0073] As a preferred embodiment, the gel 500 disclosed in the embodiment of the present invention is preferably power grease.

[0074] It should be noted that the inner wire core 401 can be made of multiple galvanized steel strands or aluminum alloy strands, and the outer aluminum wire is made of concentric spirally stranded multi-layer hard aluminum wires.

[0075] The tension wire clamp aluminum tube 100 and the tension wire clamp steel anchor 200 are standard universal structures.

[0076] The embodiment of the present invention does not limit the specific structure of the tension clamp liner 300. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0077] Please refer to Figures 3 to 5 As one embodiment, the tension clamp liner 300 disclosed in the embodiment of the present invention includes a first liner 301 and a second liner 302, wherein the cross-sections of the first liner 301 and the second liner 302 are both semicircular, and the first liner 301 and the second liner 302 are assembled into a hollow tubular structure. In this way, the first liner 301 and the second liner 302 can be respectively wrapped around the outer circumference of the crimping portion 203 of the tension clamp steel anchor 200.

[0078] As a further embodiment, the inner walls of the first liner 301 and the second liner 302 disclosed in the embodiment of the present invention are further provided with grooves 303 , wherein the grooves 303 penetrate along the length direction of the tension clamp liner 300 .

[0079] There are multiple grooves 303 , which are evenly arranged along the inner wall of the tension clamp liner 300 .

[0080] It should be noted that the inner diameter of one end of the first liner 301 and the second liner 302 is expanded with the groove edge as the radius to match the root of the crimping part 203, which has an area of ​​about 5mm-8mm that cannot be pressed due to the limited position of the die.

[0081] Since the crimping portion 203 of the tension clamp steel anchor 200 is hexagonal and has edges after crimping, when the tension clamp liner 300 is installed in the internal gap of the non-pressing area 600, in order to be able to adapt to the edges, the grooves 303 in the embodiment of the present invention are preferably six, wherein the first liner 301 and the second liner 302 have three grooves each, and the grooves 303 are adapted to the edges of the crimping portion 203 of the tension clamp steel anchor 200. The arrangement of the grooves 303 can complete the installation even if the crimping portion 203 of the tension clamp steel anchor 200 is slightly bent or deformed, and the expanded end of the tension clamp liner 300 is arranged close to the connecting portion 202.

[0082] The embodiment of the present invention does not limit the specific design specifications of the groove 303. As long as the specifications meet the use requirements of the present invention, they are within the protection scope of the present invention.

[0083] As one embodiment, the depth of the groove 303 disclosed in the embodiment of the present invention is preferably 1.5 mm-2.5 mm, and the width of the groove 303 is preferably 2.5 mm-3.5 mm.

[0084] As a further embodiment, the inner diameter of the tension clamp liner 300 disclosed in the embodiment of the present invention is the same as the outer diameter of the crimping portion 203 , and the outer diameter of the tension clamp liner 300 is 0.2mm-0.8mm smaller than the inner diameter of the tension clamp aluminum tube 100 .

[0085] Such arrangement not only enables the tension clamp liner 300 to completely wrap the crimping portion 203 of the tension clamp steel anchor 200, but also enables a certain gap to be maintained with the tension clamp aluminum tube 100, so as to facilitate the installation of the tension clamp aluminum tube 100 on the tension clamp liner 300, thereby avoiding interference caused by processing errors of various components.

[0086] The embodiment of the present invention does not limit the specific material of the tension clamp liner 300. As long as the material meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0087] As a preferred embodiment, the material of the tension clamp liner 300 disclosed in the embodiment of the present invention is preferably aluminum.

[0088] The embodiment of the present invention further discloses a method for crimping a tension clamp for an anti-freezing and bulging conductor, which is applied to the tension clamp for an anti-freezing and bulging conductor disclosed in any of the above embodiments, wherein the method for crimping a tension clamp for an anti-freezing and bulging conductor specifically comprises the following steps:

[0089] S100: stripping the outer aluminum wire of the first end of the conductor 400 to expose the inner wire core 401;

[0090] S200: inserting the first end of the conductor into the tension clamp aluminum tube 100 until the inner layer wire core 401 is completely exposed, and then stopping the insertion;

[0091] S300: insert the inner wire core 401 into the pipe opening of the crimping portion 203 of the tension wire clamp steel anchor 200 until it contacts the bottom of the pipe, and apply pressure;

[0092] S400: Wrap the tension clamp liner 300 around the outer periphery of the crimping portion 203 of the tension clamp steel anchor 200, and move the tension clamp aluminum tube 100 so that the tension clamp liner 300 is placed inside the tension clamp aluminum tube 100;

[0093] S500: Position the tension clamp aluminum tube 100 on the conductor 400, determine the pressure area of ​​the tension clamp aluminum tube 100, and mark it;

[0094] S600: Apply pressure to the pressure area of ​​the tension clamp aluminum tube 100.

[0095] When the wire is crimped with the wire 400 by the tension clamp, the outer aluminum wire of the first end of the wire is firstly stripped off to expose the inner wire core 401, and then the first end of the wire 400 is inserted into the tension clamp aluminum tube 100 until the inner wire core 401 is completely exposed, and then the inner wire core 401 is inserted into the tube opening of the crimping part 203 of the tension clamp steel anchor 200 until it contacts the bottom of the tube, and pressure is applied. When the inner wire core 401 is inserted into the crimping part 203 of the tension clamp steel anchor 200, After the part 203 is installed, wrap the tension clamp liner 300 around the outer periphery of the crimping part 203 of the tension clamp steel anchor 200, move the tension clamp aluminum tube 100, so that the tension clamp liner 300 is placed in the tension clamp aluminum tube 100. At this time, the tension clamp and the conductor 400 are installed. Finally, locate the position of the tension clamp aluminum tube 100 on the conductor 400, determine the pressure area of ​​the tension clamp aluminum tube 100, mark it, and apply pressure on the pressure area of ​​the tension clamp aluminum tube 100.

[0096] Compared with the prior art, in the crimping method of the anti-freezing and bulging tension clamp for conductors disclosed in the embodiment of the present invention, since the internal gap area of ​​the non-pressed zone 600 between the tension clamp aluminum tube 100 and the crimping part 203 is filled with the tension clamp liner 300, rainwater or water vapor cannot enter the non-pressed zone 600, thereby avoiding the occurrence of freezing and bulging caused by water ingress into the non-pressed zone 600 of the tension clamp for conductors in an inverted state, thereby effectively ensuring the safe operation of the transmission line, and the tension clamp for conductors also has technical advantages such as reliable performance, simple operation and low cost.

[0097] Among them, after step S300, it also includes a step of removing burrs and applying anti-rust paint after the inner layer wire core 401 is crimped with the crimping portion 203 of the tension wire clamp steel anchor.

[0098] The method further includes the following steps after step S600: after applying pressure to the pressure area of ​​the tension clamp aluminum tube 100, filing off the burrs after crimping is completed, and polishing the filed areas with fine sandpaper.

[0099] It needs to be explained that flash refers to the flash that will be squeezed out of the gap between the upper and lower dies after the inner core 401 of the conductor 400 is crimped with the tension-resistant aluminum tube 100, and after the crimping part 203 of the tension clamp steel anchor 200 and the tension clamp aluminum tube 100 are crimped into a hexagon.

[0100] It should be noted that the second end of the conductor is generally connected to another tower.

[0101] As a further embodiment, the crimping method for a strain clamp for a conductor disclosed in the embodiment of the present invention also includes a step between step S300 and step S400, of coating the inner wall and the outer wall of the strain clamp liner 300 with gel 500, so that the internal gap area formed after the strain clamp aluminum tube 100 is threaded is filled with the strain clamp liner 300 and the gel 500.

[0102] Such an arrangement can fill up the tiny gaps inside the non-pressed area 600, and is beneficial to the conductive performance of the tension clamp.

[0103] In order to make the marking clearer and easier for staff to identify, the crimping method for a tension clamp for a conductor disclosed in an embodiment of the present invention further includes the step of making two marking lines on the tension clamp aluminum tube 100 between steps S400 and S500.

[0104] As one of the embodiments, please refer to Figure 7 The step S100 disclosed in the embodiment of the present invention includes: S101: cleaning the wire crimping part and the inner wall of the tension clamp crimping tube with a detergent; S102: measuring the length of the crimping part 203 of the tension clamp steel anchor 200, and recording it as L1; S103: starting from the end 0 of the inner layer wire core 401, marking N at the measured length of L1+△L1+Xmm; S104: cutting off the outer layer wire at the mark N to expose the inner layer wire core 401.

[0105] It should be explained that △L1 is the elongation of the crimping portion 203 of the tension clamp steel anchor 200, wherein the elongation of the crimping portion 203 of the tension clamp steel anchor 200 is 18% of the actual length of the crimping portion 203 of the tension clamp steel anchor 200 (the elongation △L1 of the tension clamp aluminum alloy tube is approximately 14% of the length L1 of the aluminum alloy tube).

[0106] In the embodiment of the present invention, Xmm is preferably 10mm-25mm (finally determined by a wire crimping test).

[0107] As a further embodiment, in step S100 disclosed in the embodiment of the present invention, between step S101 and step 102, the following steps are further included: measuring the length of the tension clamp aluminum tube 100, recording it as L2; ​​measuring from the mark N, marking P at the measured length of L2+Ymm, and tying with a tying wire at the mark P. Such a setting can effectively prevent the conductor 400 from loosening.

[0108] In the embodiment of the present invention, Ymm is preferably 20mm-60mm.

[0109] As a further embodiment, in step S100 disclosed in the embodiment of the present invention, between step S102 and step S103, the following steps are further included: measuring from the mark N, marking P1 at the measured length of 20 mm-30 mm, and tying with a tying wire at the mark P1. In this way, the loose outer aluminum wire can be tied tightly for easy cutting.

[0110] Please refer to Figure 8 In step S300 disclosed in the embodiment of the present invention, when the end of the inner wire core 401 contacts the bottom of the crimping portion 203 of the tension clamp steel anchor 200, a mark A is made at the opening of the crimping portion 203 of the tension clamp steel anchor 200.

[0111] For further explanation, please refer to Fig. 9 In step S300 disclosed in the embodiment of the present invention, the order of applying pressure to the crimping portion 203 of the tension wire clamp steel anchor 200 is specifically as follows: applying pressure from the end close to the pull ring portion 201 toward the end away from the pull ring portion 201, and the overlap of two adjacent molds of the crimping portion of the tension wire clamp steel anchor is not less than 5mm.

[0112] It should be explained that the positions numbered 1, 2, and 3 are the order of pressure application.

[0113] As one of the embodiments, please refer to Figures 10 to 12 , step S500 disclosed in the embodiment of the present invention specifically includes:

[0114] S501: mark B at the limit position of the tension clamp steel anchor 200 that the tension clamp aluminum tube 100 can reach;

[0115] S502: Mark C at the root of the crimped part, and at the same time, mark C1 at the length of BC + Zmm measured from the second end of the tension clamp aluminum tube, and record it as L3, where 8mm≤Zmm≤12mm;

[0116] Measure the length of BN and record it as L 4， Mark E at the position of the tension clamp aluminum tube 100 corresponding to the mark N;

[0117] S503: loosen the binding wire at the mark P, push the tension clamp aluminum tube, so that the tension clamp aluminum tube 100 coincides with the mark B, and then make a mark D at the port position of the first end of the tension clamp aluminum tube, wherein the mark D is located on the conductor 400;

[0118] S504: Measure the length L5 from the mark D toward the second end of the wire, mark D1, move the tension clamp aluminum tube from the mark D to the mark D1, and mark B1 on the port of the second end of the tension clamp aluminum tube 100 to achieve pre-biasing of the tension clamp aluminum tube 100. The mark B1 is located on the tension clamp steel anchor 200.

[0119] Among them, the length L5 measured from the mark D toward the second end of the wire is the crimping elongation margin reserved for the inverted tension clamp, and the L5 value is determined by the tension clamp crimping test.

[0120] The setting of the above steps can reserve elongation margin for the inverted tension clamp, which is more conducive to crimping. In order to avoid wear of the tension clamp liner 300 due to vibration in the internal gap area, the steel anchor end tension clamp aluminum tube 100 is crimped 10±2mm deep into the gap filling area to fix the first liner 301 and the second liner 302 inside the filling area.

[0121] It should be explained that the end of the crimping portion 203 is the end away from the connecting portion 202 .

[0122] Among them, the length from mark C1 to mark C is Zmm, where 8mm≤Zmm≤12mm, that is, the second end of the tension clamp aluminum tube 100 penetrates into the filling area Zmm when crimped, so as to fix the tension clamp liner 300 filled therein by crimping.

[0123] As one of the embodiments, please refer to Fig.13 , step S600 disclosed in the embodiment of the present invention includes:

[0124] S601: Check whether the first end of the tension clamp aluminum tube 100 coincides with the mark D1, and whether the second end of the tension clamp aluminum tube 100 coincides with the mark B1. If they coincide, proceed to step S602; if they do not coincide, readjust the position of the tension clamp aluminum tube 100; at the same time, check whether the mark C1 and the mark E are marked. If they are marked, proceed to step S602; if they are not marked, re-mark them;

[0125] S603: Apply pressure from the first end of the tension clamp to mark E;

[0126] S604: Apply pressure from mark C1 to the second end of the tension clamp aluminum tube.

[0127] Among them, the length from mark C1 to mark C is 8mm-12mm. Such a setting can ensure that the 8mm-12mm of the tension clamp liner 300 close to the tension clamp steel anchor end is crimped, thereby avoiding the tension clamp liner 300 in the non-compression zone 600 due to displacement or shaking caused by the vibration of the conductor 400 and causing wear, and can ensure that the crimping part 203 of the tension clamp steel anchor 200 and the inner core 401 of the conductor 400 in the non-compression zone 600 can still maintain freedom, and the stress conditions and free elasticity of each component when bearing the tension of the conductor 400 are basically consistent with when the non-compression zone 600 is not filled, and the strength of the tension clamp will not be affected after the non-compression zone is filled with the tension clamp liner 300.

[0128] As a further embodiment, in steps S602 and S603 disclosed in the embodiment of the present invention, the overlap of two adjacent molds of the tension clamp aluminum tube is not less than 10 mm.

[0129] It should be explained that the numbers 1-9 are the order of pressure application.

[0130] It should be noted that the relevant parameters of the tension clamps of the commonly used steel core aluminum stranded wire are shown in Table 1. The design parameters of the tension clamps of the corresponding non-pressurized area with tension clamp liner 300 can refer to Table 2. For details, please refer to:

[0131] Table 1: Parameters of commonly used tension clamps before crimping (unit: mm)

[0132]

[0133] Table 2: Commonly used tension clamp liner design parameters (unit: mm):

[0134]

[0135] It should be noted that:

[0136] 1) The length of the tension clamp liner = the length of the tension clamp steel anchor crimping part + △L + 20mm, (the elongation △L of the tension clamp steel anchor crimping part is about 18% of the actual length of the crimping part: the elongation △L of the tension clamp aluminum alloy tube crimping part is about 14% of the length of the aluminum alloy tube crimping part);

[0137] 2) D1 = inner diameter of the aluminum tube of the tension clamp - 0.5 mm, D2 = outer diameter of the crimping part of the steel anchor of the tension clamp + 4.2 mm, D3 = outer diameter of the crimping part of the steel anchor of the tension clamp;

[0138] 3) The radii R1, R2, and R3 correspond to the diameters D1, D2, and D3 respectively, that is, R1 = D1 / 2, R2 = D2 / 2, and R3 = D3 / 2.

[0139] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0140] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0141] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tension clamp for an anti-freezing and bulging conductor, used for crimping with a conductor, the conductor comprising an outer aluminum wire and an inner wire core, It is characterized in that The conductor tension clamp at least comprises: A tension clamp aluminum tube, wherein the tension clamp aluminum tube is a hollow tubular structure to accommodate the wire passing through the first end of the tension clamp aluminum tube and is connected with a guide plate; A tension wire clamp steel anchor, the tension wire clamp steel anchor comprising a pull ring portion, a connecting portion and a crimping portion connected in sequence, the pull ring portion being located outside the tension wire clamp aluminum tube, the crimping portion and the connecting portion being installed at the second end of the tension wire clamp aluminum tube, the crimping portion being a hollow tubular structure, and an opening being provided at the end of the crimping portion for installing the inner wire core of the conductor; The tension clamp liner is sleeved on the outer periphery of the crimping portion and fills the internal gap area between the tension clamp aluminum tube and the crimping portion.

2. The anti-freezing bulging conductor tension clamp according to claim 1, It is characterized in that Gel is also filled between the tension clamp liner and the crimping portion, and between the tension clamp liner and the tension clamp aluminum tube.

3. The anti-freezing bulging conductor tension clamp according to claim 1, It is characterized in that The inner layer wire core is made of multiple galvanized steel strands or aluminum alloy strands; The outer aluminum wire is made of concentric spirally twisted multi-layer hard aluminum wires.

4. The anti-freezing bulging conductor tension clamp according to claim 1, It is characterized in that The tension clamp liner includes a first liner and a second liner. The cross-sections of the first liner and the second liner are both semicircular. The first liner and the second liner are assembled into a hollow tubular structure.

5. The anti-freezing bulging conductor tension clamp according to claim 4, It is characterized in that The inner walls of the first liner and the second liner are also provided with grooves, and the grooves penetrate along the length direction of the tension clamp liner; The grooves are multiple and are evenly arranged along the inner wall of the tension clamp liner.

6. The anti-freezing bulging conductor tension clamp according to claim 5, It is characterized in that The depth of the groove is 1.5 mm-2.5 mm, and the width of the groove is 2.5 mm-3.5 mm.

7. The conductor tension clamp according to claim 1, It is characterized in that The inner diameter of the tension clamp liner is the same as the outer diameter of the crimping portion, and the outer diameter of the tension clamp liner is 0.2mm-0.8mm smaller than the inner diameter of the tension clamp aluminum tube.

8. A method for crimping a tension clamp for an anti-freezing and bulging conductor, applied to the tension clamp for an anti-freezing and bulging conductor as claimed in any one of claims 1 to 7, It is characterized in that The following steps are involved: S100: stripping the outer aluminum wire of the first end of the conductor to expose the inner wire core; S200: inserting the first end of the conductor into the tension clamp aluminum tube until all the inner wire cores are exposed and then the insertion stops; S300: inserting the inner wire core into the pipe opening of the crimping part of the tension wire clamp steel anchor until it contacts the bottom of the pipe, and applying pressure; S400: Wrapping the tension clamp liner tube around the outer periphery of the crimping portion of the tension clamp steel anchor, moving the tension clamp aluminum tube, so that the tension clamp liner tube is placed inside the tension clamp aluminum tube; S500: locating the position of the tension clamp aluminum tube on the conductor, determining the pressure area of ​​the tension clamp aluminum tube, and marking it; S600: Apply pressure to the pressure area of ​​the tension clamp aluminum tube.

9. The crimping method of the tension clamp for the anti-freezing bulging conductor according to claim 8, It is characterized in that Also included between step S300 and step S400 are the following steps: The inner wall and the outer wall of the tension clamp liner are coated with gel, so that the internal gap area formed after the tension clamp aluminum tube is threaded is filled with the tension clamp liner and the gel.

10. The crimping method of the tension clamp for the anti-freezing bulging conductor according to claim 8, It is characterized in that The step S500 specifically includes: S501: Mark B on the limit position of the tension clamp steel anchor that the tension clamp aluminum tube can reach; S502: Mark C at the root of the crimping portion, and mark C at the point where the BC length + Zmm length is measured from the second end of the tension clamp aluminum tube. 1 , recorded as L 3 , where 8mm≤Zmm≤12mm; Measure the length of BN and record it as L 4， Mark E at the position of the tension clamp aluminum tube corresponding to the mark N; S503: loosen the binding wire at the mark P, push the tension clamp aluminum tube, so that the second end of the tension clamp aluminum tube coincides with the mark B, and mark D is made at the port position of the first end of the tension clamp aluminum tube, and the mark D is located on the conductor; S504: Measure L from the mark D toward the second end of the wire 5 Length, marked D 1 , move the tension clamp aluminum tube from the mark D to the mark D 1 At the same time, the port at the second end of the tension clamp aluminum tube is marked B 1 , in order to achieve the pre-biasing of the tension clamp aluminum tube, the mark B 1 Located on the tension wire clamp steel anchor, Measure L from the mark D towards the second end of the wire 5 The length is the reserved crimping elongation margin for the inverted tension clamp, L 5 The value is determined by the tension clamp crimping test.

11. The crimping method of the tension clamp for the anti-freezing bulging conductor according to claim 10, It is characterized in that The marker C 1 The length to the mark C is Zmm, wherein 8mm≤Zmm≤12mm, i.e., when the second end of the tension clamp aluminum tube is crimped, it penetrates into the filling area by Zmm, so as to fix the liner filled therein by crimping.

12. The crimping method of the tension clamp for the anti-freezing bulging conductor according to claim 10, It is characterized in that The step S600 includes: S601: Check whether the first end of the tension clamp aluminum tube is aligned with the mark D 1 coincide with the second end of the tension clamp aluminum tube and the mark B. 1 If they overlap, then proceed to step S602; if they do not overlap, then readjust the position of the tension clamp aluminum tube; and at the same time check the mark C 1 and whether the mark E is marked, if so, proceed to step S602, if not, re-mark; S602: applying pressure from the first end of the tension clamp to the mark E one by one; S603: From the marker C 1 Apply pressure to the second end of the tension clamp aluminum tube one by one.

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