Universal tension wire clamp anti-falling kit and installation method

Abstract

The present invention discloses a universal anti-falling kit for tension wire clamps and an installation method in the technical field of electric power protective hardware structure. The device comprises a front-end self-locking clamp, a pull rod and a rear-end buckle clamp. The front-end self-locking clamp is fixed on the front-end tension wire, and the rear-end buckle clamp is fixed to the end of the U-shaped ring, PT adjustment plate or PD extension plate at the rear end. The pull rod is provided with two groups symmetrical on the left and right, respectively connecting the left and right ends of the front-end self-locking clamp and the rear-end buckle clamp. The protective hardware that bears the mechanical tension of the wire consists of only three parts. The tight hoop clamp adopts the type of inner and outer cone sleeve configuration, which is light and simple and easy to install. In addition, the present invention no longer relies on the steel anchor ring of the wire tension compression pipe for installation, so that the anti-falling kit for tension wire clamps of the present invention has better versatility.

Description

Technical Field

[0001] The invention relates to the technical field of electric power protection hardware structures, and in particular to a universal tension clamp anti-falling kit and an installation method. Background Art

[0002] The conductor crimping tubes in the running lines are prone to wire pulling, breaking, heating and burning, causing the conductors to fall to the ground and the line to stop power supply due to insufficient pressure during hydraulic crimping, mold deformation not reaching the required compression ratio, or due to problems such as the connection of new and old conductors, inadequate purification work, and insufficient tightening of the bolts of the tension clamp drainage plate. In particular, the tension-type crimping tubes of the transmission lines crossing high-speed railways, highways, rail transit and important municipal facilities will cause a series of serious secondary hazards once they break. Most of the current protective measures are reinforced by adding pre-twisted full-tension wire clamps and pre-twisted full-tension splicing strips, and they have sufficient gripping force. However, due to its complex structure and long length, it is very inconvenient to use equipotential charging installation at the tension-type crimping tubes of the power line.

[0003] To this end, the invention patent with patent application number CN201710024110.5 discloses a tension conductor compression tube protection device, which utilizes its load-bearing clamp to adopt the type of inner and outer cone sleeves, and has the function of increasing the clamping force as the axial tension increases. Because it relies on the two screws connected in series to the U-shaped pull ring of the conductor tension tube steel anchor ring to penetrate the earring holes on both sides to bear the conductor tension, it always maintains a moderate tension state, and no impact force will be generated in the event that the conductor tension tube falls off; however, since the U-shaped pull ring needs to be installed through the conductor tension tube steel anchor ring, and in actual applications, especially some ultra-high voltage line equipment, due to different force requirements, the U-shaped pull ring may not be able to pass through the conductor tension tube steel anchor ring after the rod diameter is increased, resulting in the original protective device cannot be installed smoothly, and cannot be installed and used with other clamps that do not have a steel anchor ring structure.

[0004] Based on this, the present invention designs a universal tension clamp anti-falling kit and an installation method to solve the above problems. Summary of the invention

[0005] The purpose of the invention is to provide a universal tension clamp anti-falling kit and installation method to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the invention provides the following technical solutions: a universal tension wire clamp anti-fall-off kit, comprising a front-end self-locking clamp, a pull rod and a rear-end snap-on clamp, wherein the front-end self-locking clamp is fixed on the front-end tension wire, and the rear-end snap-on clamp is fixed to the rear-end U-shaped ring, PT adjustment plate or PD extension plate, etc. The pull rod is provided with two groups symmetrical on the left and right, respectively connecting the left and right ends of the front-end self-locking clamp and the rear-end snap-on clamp.

[0007] Preferably, the front end self-locking clamp includes a positioning stop sleeve, an outer conical inner sleeve and a tightening outer sleeve, the outer conical inner sleeve abuts against the outer wall of the tension-resistant conductor, and the small diameter end of the outer conical inner sleeve penetrates into the tightening outer sleeve along the tension direction, and the positioning stop sleeve blocks and abuts against the rear large diameter end of the outer conical inner sleeve.

[0008] Preferably, the positioning stop sleeve is composed of two semicircular arc seats, whose inner diameter is larger than the outer diameter of the wire, and the left and right ends of the two semicircular arc seats are respectively provided with a single ear plate and a double ear plate, and the single ear plate and the double ear plate are provided with through holes for the pull rod to pass through, and when the two semicircular arc seats are closed, the through holes on the single ear plate and the double ear plate are connected, and the other left and right ends of the two semicircular arc seats are locked with screws after being provided with screw holes.

[0009] Preferably, the outer cone inner sleeve is composed of two semi-conical sleeves, whose inner diameter is equal to the outer diameter of the wire, the inner cavity of the semi-conical sleeve is provided with anti-slip convex grooves distributed in an axial array, and positioning protrusions and positioning grooves are respectively provided on both sides of the fitting surface of the semi-conical sleeve. When the two semi-conical sleeves are closed, the positioning protrusion of one of the semi-conical sleeves is buckled into the positioning groove of the other semi-conical sleeve.

[0010] Preferably, the closing sleeve is composed of two half-plates, the inner side of each half-plate is provided with a conical groove which fits with the outer wall of the outer conical inner sleeve, and both sides of each half-plate are provided with lugs which are spaced apart along the axial direction of the semi-cylinder. The lugs of the two half-plates are arranged alternately when the two half-plates are closed, and the lug of one half-plate is embedded in the gap between the lugs of the other half-plate. A through hole is provided on the lug for the pull rod to pass through, and the through holes on the lugs are connected when the two half-plates are closed.

[0011] Preferably, the pull rod member comprises a flat steel rod, both ends of which are hinged with a bolt assembly by bolts, the bolt assembly comprises a hinged seat hinged to the flat steel rod, a bolt body is integrally provided on the hinged seat, and both sides of the front end self-locking clamp and the rear end buckle clamp are respectively mounted and locked on the bolt bodies at both ends.

[0012] Preferably, the rear-end snap-on clamp includes a clamp body, with ear holes at both ends of the clamp body, in which an internally threaded sleeve is rotatably embedded for the pull rod to threadably pass through, and an open groove is opened at the bottom of the clamp body. During installation, the open groove is snapped onto the end of the U-shaped ring, PT adjustment plate or PD extension plate, and is laterally locked and sealed with bolts.

[0013] A method for installing a universal tension clamp anti-dropping kit comprises the following steps:

[0014] Step S10: The equipotential electrician first fastens the rear end fastening fixture to the end of the U-shaped ring, PT adjustment plate or PD extension plate, and uses bolts to lock and seal the opening transversely, and screws the bolt body at one end of the two sets of tie rods through the internal threaded sleeves on the left and right sides of the rear end fastening fixture;

[0015] Step S20: two semi-conical sleeve outer cone inner sleeves and two semi-circular arc seat positioning sleeves are arranged outside the tension conductor, and are closed toward the conductor from the upper and lower sides, and the rear end surfaces of the two semi-conical sleeve outer cone inner sleeves are aligned and abutted against the front ends of the two semi-circular arc seats, and the outer cone inner sleeves are clamped with a round clip;

[0016] Step S30: After the two half-plates are set in front of the aluminum inner sleeve and twisted toward the wire from the upper and lower sides, lift the bolt assembly at one end and insert it into the two sides of the rear end buckle clamp and screw the pre-tightened pull rod, pre-fix a pair of double nuts on the bolt assembly at the front end of the pull rod, and then insert it into the ear hole plates and through holes on the left and right sides of the positioning stopper sleeve, as well as the convex ear holes on the left and right sides of the closing sleeve, and screw a nut on each bolt assembly;

[0017] Step S40: Tighten the nuts on the bolt assemblies on both sides at the same time, and the tightened outer sleeve will slide along the inner sleeve of the outer cone toward the positioning stop sleeve. Continue to tighten the nuts on the bolt assemblies on both sides until the front end of the original U-shaped ring, PT adjustment plate or PD extension plate and the front end steel anchor ring connection point are slightly loose, stop tightening the nuts, and loosen the nuts appropriately so that the original U-shaped ring, PT adjustment plate or PD extension plate can still bear the normal operating tension of the tension-resistant wire, and then add a locking nut and a cotter pin to each of the two front end bolt assemblies.

[0018] Compared with the prior art, the invention has the following beneficial effects:

[0019] The load-bearing clamp of the present invention adopts the type of inner and outer cone sleeves, and has the function that the clamping force increases with the increase of the axial tension; and because the two screws of the pull rod member connected in series to the ends of the U-shaped ring, PT adjustment plate or PD extension plate are inserted into the earring holes on both sides to bear the wire tension, it always maintains a moderate tension state, and even if the wire tension-resistant pressure pipe is disconnected, no impact force will be generated;

[0020] In addition, since the device uses a new type of rear-end snap-on clamp combined with a pull rod to replace the original U-shaped screw structure, the rear-end snap-on clamp can be directly snapped and connected with the end steel plates of the ordinary structure, such as the U-shaped ring, PT adjustment plate or PD extension plate, during installation, and no longer relies on the steel anchor ring of the conductor tension compression tube for installation, which makes the tension wire clamp anti-fall-off kit of the present invention have better versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall explosion structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the rear end buckle clamp of the present invention;

[0025] Figure 4 This is a schematic diagram of the installation structure of the present invention.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 100-front end self-locking clamp, 110-positioning stop sleeve, 111-semicircular arc seat, 112-single ear plate, 113-double ear plate, 120-external conical inner sleeve, 121-semiconical sleeve, 122-anti-slip convex pattern, 123-positioning protrusion, 124-positioning groove, 130-tightening outer sleeve, 131-half plate, 132-conical groove, 133-lug, 200-pull rod, 210-flat steel rod, 220-bolt assembly, 221-hinged seat, 222-bolt body, 300-rear end buckle clamp, 310-clamp body, 320-ear hole, 330-opening groove, 340-inner threaded sleeve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0029] See also Figure 1The invention provides a technical solution: a universal tension clamp anti-falling kit, comprising a front end self-locking clamp 100, a pull rod 200 and a rear end buckle clamp 300, the front end self-locking clamp 100 is fixed on the front end tension wire, the rear end buckle clamp 300 is fixed to the end of the U-shaped ring, PT adjustment plate or PD extension plate at the rear end, and the pull rod 200 is provided with two groups symmetrical on the left and right, respectively connecting the left and right ends of the front end self-locking clamp 100 and the rear end buckle clamp 300. Since the device uses a new type of rear end buckle clamp 300 combined with the pull rod 200 to replace the original U-shaped screw structure, the rear end buckle clamp 300 can be directly buckled and connected with the end steel plates of the U-shaped ring, PT adjustment plate or PD extension plate of the ordinary structure during installation, and no longer relies on the steel anchor ring of the wire tension compression pipe for installation, so that the tension clamp anti-falling kit of the invention has better versatility.

[0030] Specifically, Figure 2-3 As shown, the front end self-locking clamp 100 includes a positioning stop sleeve 110, an outer conical inner sleeve 120 and a tightening outer sleeve 130. The outer conical inner sleeve 120 abuts against the outer wall of the tension-resistant conductor, and the small-diameter end of the outer conical inner sleeve 120 penetrates into the tightening outer sleeve 130 along the tension direction. The positioning stop sleeve 110 blocks and abuts against the large-diameter end of the outer conical inner sleeve 120. The inner and outer conical sleeves are configured, and the clamping force increases with the increase of the axial tension. Because the two screws of the pull rod 200 connected in series to the ends of the U-shaped ring, PT adjustment plate or PD extension plate are inserted into the earring holes on both sides to bear the conductor tension, it always maintains a moderate tension state, and no impact force will be generated in the event that the conductor tension-resistant compression pipe falls off.

[0031] Furthermore, the positioning stop sleeve 110 is composed of two semi-circular arc seats 111, whose inner diameter is larger than the outer diameter of the wire, and the left and right ends of the two semi-circular arc seats 111 are respectively provided with a single ear plate 112 and a double ear plate 113, and the single ear plate 112 and the double ear plate 113 are provided with through holes for the pull rod member 200 to pass through. When the two semi-circular arc seats 111 are closed, the through holes on the single ear plate 112 and the double ear plate 113 are interconnected, and the other left and right ends of the two semi-circular arc seats 111 are locked with screws after being provided with screw holes 114; the outer cone inner sleeve 120 is composed of two semi-conical sleeves 121, whose inner diameter is equal to the outer diameter of the wire, and the inner cavity of the semi-conical sleeve 121 is provided with anti-slip convex patterns 122 distributed in an axial array, and positioning protrusions 123 and positioning grooves 124 are respectively provided on both sides of the fitting surface of the semi-conical sleeve 121. When the sleeve 121 is closed, the positioning protrusion 123 of one semi-conical sleeve 121 is buckled into the positioning groove 124 of the other semi-conical sleeve 121, playing a role of matching positioning; the closing outer sleeve 130 is composed of two half-plates 131, and the inner side of the half-plate 131 is provided with a conical groove 132 that matches the outer wall of the outer conical inner sleeve 130, and lugs 133 are distributed on both sides of the half-plate 131. The lugs 133 are spaced apart along the axial direction of the semi-cylinder. The lugs 133 of the two half-plates 131 are staggered when the two half-plates 131 are closed, and the lug 133 of one half-plate 131 is embedded in the interval between the lugs 133 of the other half-plate 131. A through hole for the pull rod 200 to pass through is provided on the lug 133, and the through holes on the lugs 133 are connected when the two half-plates 121 are closed.

[0032] In addition, the pull rod 200 includes a flat steel rod 210, and both ends of the flat steel rod 210 are hinged with bolt assemblies 220 by bolts. The bolt assembly 220 includes a hinged seat 221 hinged to the flat steel rod 210, and a bolt body 222 is integrally arranged on the hinged seat 221. Both sides of the front end self-locking clamp 100 and the rear end buckle clamp 300 are respectively sleeved and locked on the bolt bodies 222 at both ends. Since the installation spacing of the left and right sides of the front end self-locking clamp 100 and the rear end buckle clamp 300 is different, the pull rod 200 cannot be replaced by a tension screw. The pull rod 200 uses a three-section bent flat steel rod 210 to connect the bolt assemblies 220 at both ends. The purpose of the structural design is not only to have more degrees of freedom to facilitate the connection operation during high-altitude installation, but also to play a role in pulling force while ensuring that the bolt bodies 222 at both ends are parallel to each other, thereby facilitating the smooth transmission of pulling force.

[0033] In addition, the rear-end snap-on clamp 300 includes a clamp body 310, and both ends of the clamp body 310 have ear holes 320. An internal threaded sleeve 340 for the pull rod 200 to be threaded through is rotatably embedded in the ear hole 320. An open groove 330 is opened at the bottom of the clamp body 310. During installation, the open groove 330 is snapped onto the end of the U-shaped ring, PT adjustment plate or PD extension plate, and is laterally locked and sealed with bolts. After actual tensioning and installation, the clamp body 310 and the ends of the U-shaped ring, PT adjustment plate or PD extension plate are abutted against each other in the direction of tension, and the open groove 330 is not only convenient for installation in the lateral direction, breaking through the limitations of the original U-shaped screw passing through the rigid anchor ring connection form, but also does not affect the firmness of the connection.

[0034] Reference Figure 4 Based on the above device structure, the installation method embodiment of the present invention is as follows:

[0035] A method for installing a universal tension clamp anti-dropping kit comprises the following steps:

[0036] Step S10: The equipotential electrician first fastens the rear end fastening fixture 300 to the end of the U-shaped ring, PT adjustment plate or PD extension plate, and uses bolts to lock and seal the opening transversely, and screws the bolt bodies 222 at one end of the two sets of tie rods 200 through the internal threaded sleeves 340 on the left and right sides of the rear end fastening fixture 300;

[0037] Step S20: The outer cone inner sleeves 120 of the two semi-conical sleeves 121 and the positioning sleeves 110 of the two semi-circular arc seats 111 are arranged outside the tension conductor, and are closed toward the conductor from the upper and lower sides, and the rear end surfaces of the outer cone inner sleeves 120 of the two semi-conical sleeves 121 are aligned and abutted against the front ends of the two semi-circular arc seats 111, and the outer cone inner sleeves 120 are clamped with a round clip;

[0038] Step S30: After the two half-plates 131 and the tightening outer sleeve 130 are arranged in front of the aluminum inner sleeve and twisted toward the wire from the upper and lower sides, lift the bolt assembly 220 at one end and insert it into the two sides of the rear end buckle clamp 300 and screw it into the pre-tightened tie rod 200, and pre-fix a pair of double nuts on the bolt assembly 220 at the front end of the tie rod 200, and then insert them into the ear hole plates and through holes on the left and right sides of the positioning stopper 110, as well as the lug 133 holes on the left and right sides of the tightening outer sleeve 130, and screw a nut on each bolt assembly 220;

[0039] Step S40: Tighten the nuts on the bolt assemblies 220 on both sides at the same time, and the closing outer sleeve 130 will slide along the outer conical inner sleeve 120 toward the positioning stop sleeve 110, and continue to tighten the nuts on the bolt assemblies 220 on both sides until the front end of the original U-shaped ring, PT adjustment plate or PD extension plate and the front end steel anchor ring connection point are slightly loose, stop tightening the nuts, and loosen the nuts appropriately so that the original U-shaped ring, PT adjustment plate or PD extension plate can still bear the normal operating tension of the tension-resistant wire, and then add a locking nut and a cotter pin to each of the two front end bolt assemblies 220.

[0040] In the description of the invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0041] In the invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the invention according to the specific circumstances.

[0042] Although embodiments of the invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A universal tension clamp anti-drop kit, characterized by: The invention comprises a front-end self-locking clamp (100), a pull rod (200) and a rear-end buckle clamp (300), wherein the front-end self-locking clamp (100) is fixed to the front-end tension wire, the rear-end buckle clamp (300) is fixed to the end of a U-shaped ring, a PT adjustment plate or a PD extension plate at the rear end, and the pull rod (200) is provided with two groups symmetrical on the left and right sides, respectively connecting the left and right ends of the front-end self-locking clamp (100) and the rear-end buckle clamp (300); The front end self-locking clamp (100) comprises a positioning stopper sleeve (110), an outer conical inner sleeve (120) and a tightening outer sleeve (130), wherein the outer conical inner sleeve (120) abuts against the outer wall of the tension-resistant conductor, and the small diameter end of the outer conical inner sleeve (120) penetrates into the tightening outer sleeve (130) along the tension direction, and the positioning stopper sleeve (110) abuts against the rear large diameter end of the outer conical inner sleeve (120); The pull rod (200) comprises a flat steel rod (210), and bolt assemblies (220) are hingedly connected at both ends of the flat steel rod (210) by bolts. The bolt assembly (220) comprises a hinge seat (221) hingedly connected to the flat steel rod (210), and a bolt body (222) is integrally provided on the hinge seat (221). Both sides of the front self-locking clamp (100) and the rear buckle clamp (300) are respectively sleeved and locked on the bolt bodies (222) at the two ends. The rear-end buckle clamp (300) includes a clamp body (310), and both ends of the clamp body (310) have ear holes (320), and an internal threaded sleeve (340) is rotatably embedded in the ear hole (320) for the pull rod (200) to be threaded and passed through. An open groove (330) is opened at the bottom of the clamp body (310). During installation, the open groove (330) is buckled with the end of the U-shaped ring, PT adjustment plate or PD extension plate, and is locked and sealed horizontally by bolts.

2. A universal tension clamp anti-drop kit according to claim 1, characterized in that: The positioning stopper sleeve (110) is composed of two semi-circular arc seats (111), the inner diameter of which is larger than the outer diameter of the conductor. The left and right ends of the two semi-circular arc seats (111) are respectively provided with a single ear plate (112) and a double ear plate (113). The single ear plate (112) and the double ear plate (113) are provided with through holes for the pull rod (200) to pass through. When the two semi-circular arc seats (111) are closed, the through holes on the single ear plate (112) and the double ear plate (113) are connected. The other left and right ends of the two semi-circular arc seats (111) are provided with screw holes (114) and are locked with screws.

3. A universal tension clamp anti-drop kit according to claim 2, characterized in that: The outer cone inner sleeve (120) is composed of two semi-conical sleeves (121), the inner diameter of which is equal to the outer diameter of the wire, the inner cavity of the semi-conical sleeve (121) is provided with anti-slip convex patterns (122) distributed in an axial array, and both sides of the fitting surface of the semi-conical sleeve (121) are respectively provided with positioning protrusions (123) and positioning grooves (124), and when the two semi-conical sleeves (121) are closed, the positioning protrusion (123) of one of the semi-conical sleeves (121) is buckled into the positioning groove (124) of the other semi-conical sleeve (121).

4. A universal tension clamp anti-drop kit according to claim 3, characterized in that: The closing sleeve (130) is composed of two half-plates (131), the inner side of each half-plate (131) is provided with a conical groove (132) which matches with the outer wall of the outer conical inner sleeve (120), and lugs (133) are distributed on both sides of each half-plate (131), and the lugs (133) are distributed at intervals along the axial direction of the semi-cylinder. When the two half-plates (131) are closed, the lugs (133) of one half-plate (131) are arranged in a staggered manner, and the lugs (133) of one half-plate (131) are embedded in the interval between the lugs (133) of the other half-plate (131). A through hole is provided on the lug (133) for the pull rod (200) to pass through, and when the two half-plates (131) are closed, the through holes on the lugs (133) are connected.

5. The installation method of a universal tension clamp anti-dropping kit according to claim 4 is characterized in that: The following steps are involved: Step S10: The equipotential electrician first fastens the rear end fastening fixture (300) to the end of the U-shaped ring, the PT adjustment plate or the PD extension plate, and uses bolts to transversely lock and seal the opening, and screws the bolt bodies (222) at one end of the two sets of tie rods (200) through the internal threaded sleeves (340) on the left and right sides of the rear end fastening fixture (300); Step S20: two semi-conical sleeves (121) of the outer conical inner sleeve (120) and two semi-circular arc seats (111) of the positioning stop sleeve (110) are arranged outside the tension conductor, and are closed toward the conductor from the upper and lower sides, and the rear end surfaces of the outer conical inner sleeves (120) of the two semi-conical sleeves (121) are aligned and abutted against the front ends of the two semi-circular arc seats (111), and the outer conical inner sleeve (120) is clamped with a round-mouth clamp; Step S30: After the two half-plates (131) are set in the vicinity of the aluminum inner sleeve and the closing outer sleeve (130) is twisted toward the wire from the upper and lower sides, the bolt assembly (220) at one end is lifted and inserted into both sides of the rear end buckle clamp (300) and screwed to the pre-tightened tie rod (200), and the bolt assembly (220) at the front end of the tie rod (200) is pre-fixed with a pair of double nuts and then respectively inserted into the ear hole plates and through holes on the left and right sides of the positioning stop sleeve (110), and the ears (133) holes on the left and right sides of the closing outer sleeve (130), and a nut is screwed on each bolt assembly (220); Step S40: Tighten the nuts on the bolt assemblies (220) on both sides simultaneously, and the closing outer sleeve (130) will slide along the outer conical inner sleeve (120) toward the positioning stop sleeve (110). Continue to tighten the nuts on the bolt assemblies (220) on both sides simultaneously until the connection point between the front end of the original U-shaped ring, PT adjustment plate or PD extension plate and its front end steel anchor ring is slightly loose. Stop tightening the nuts, and loosen the nuts appropriately so that the original U-shaped ring, PT adjustment plate or PD extension plate can still withstand the normal operating tension of the tension-resistant wire. Then, add a locking nut and a cotter pin to each of the two front end bolt assemblies (220).

Images