CN215934412U

CN215934412U - Pre-twisted strain clamp

Info

Publication number: CN215934412U
Application number: CN202122417854.8U
Authority: CN
Inventors: 聂宏
Original assignee: Kyushu Tongchuang Shandong Power Technology Co ltd
Current assignee: Kyushu Tongchuang Shandong Power Technology Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-03-01
Anticipated expiration: 2031-10-08

Abstract

The utility model provides a preformed helical strain clamp, includes preformed armor rods and gold utensil, the gold utensil includes U type ring, ratchet subassembly, socket link plate and heart type ring, heart type ring one end with the preformed armor rods is connected, the preformed armor rods is connected with the cable, the heart type ring other end with the socket link plate is connected, the socket link plate is that one end is the socket, and one end is the link fitting that the plate-type constitutes, socket link plate shape end with the heart type ring is connected, socket link plate socket end is connected with ratchet subassembly, ratchet subassembly can drive socket link plate and preformed armor rods rotate, the ratchet subassembly other end with the U type ring is connected, the U other end is connected on the pole. This preformed helical strain clamp makes the preformed helical yarn of installing also adjust through the rotation of ratchet through setting up the ratchet subassembly, makes things convenient for the maintenance work of later stage in the use.

Description

Pre-twisted strain clamp

Technical Field

The utility model relates to the field of overhead line hardware fittings, in particular to a pre-twisted strain clamp.

Background

The pre-twisted strain clamp is a strain clamp which is widely applied, is used for fixing the middle and the terminal of an overhead line conductor and an overhead optical cable, has the characteristics of high holding power, light weight, uniform stress distribution, good corrosion resistance, simple installation, strong universality and the like, and is widely applied to the conductor, the overhead composite ground wire OPGW, the overhead composite phase wire OPPC, the full-medium self-supporting overhead optical cable ADSS and other overhead optical cables.

The pre-twisted strain clamp is simple in structure and generally comprises a pre-twisted spiral strain pre-twisted wire and a matched connecting hardware fitting, wherein the matched connecting hardware fitting comprises a heart-shaped or U-shaped connecting ring, an extension rod or a hanging plate, a hanging ring and the like. The pre-twisted strain clamp can be divided into a single-layer pre-twisted strain clamp and a double-layer pre-twisted strain clamp according to the tension. For the single-layer pre-twisted strain clamp, the strain pre-twisted wire is folded to form a U-shaped elbow, the U-shaped elbow is sleeved on the connecting hardware fitting connecting ring, so that the strain clamp is connected with the tower, and the rest parts (two legs) of the pre-twisted wire are uniformly arranged to form hollow pipes. The inner diameter of the hollow tube formed by the two legs of the preformed armor rods is smaller than the outer diameter of the applicable wire/optical cable/stay wire, and when the hollow tube is wound on the wire or the overhead optical cable, a uniform compressive stress is generated on the contact surface of the hollow tube, and then the hollow tube is converted into a friction force, so that a strong tension force is generated. In addition, carborundum is often sprayed on the inner side of the preformed armor rod double-leg structure to increase the friction between the preformed armor rods and the conducting wire or the aerial optical cable. The double-layer pre-twisted strain clamp also comprises an inner-layer pre-twisted wire (also called a wire protecting strip pre-twisted wire). In order to avoid installation errors and facilitate quick installation, the inner layer preformed armor rods are often prefabricated into 1-7 sub-beams during machining, the inner walls of the inner layer preformed armor rods are adhered with micro-grain carborundum, friction force can be increased when the inner layer preformed armor rods are wound on the outer surface of a conducting wire or an overhead optical cable, the strain resistant preformed armor rods are wound on the outer surface of the inner layer preformed armor rods, and lateral pressure of the double-layer preformed armor rod clamp on the conducting wire or the optical cable can be reduced, and higher tension force is provided.

The existing pre-twisted strain clamp cannot adjust the state of the pre-twisted wire after being used, if the pre-twisted strain clamp is used, the pre-twisted wire needs to be disassembled and then reinforced again if the pre-twisted wire is loosened for clamping the cable, and the whole cable can be stopped in the maintenance process to influence normal use.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides the pre-twisted type strain clamp, the ratchet wheel assembly is arranged in the metal matched with the pre-twisted wire, the ratchet wheel assembly can drive the mounted pre-twisted wire to rotate again, the post maintenance and reinforcement work of the pre-twisted wire is facilitated, and the maintenance and mounting work after the pre-twisted wire is dismounted is not needed.

The technical scheme of the utility model is as follows: the utility model provides a preformed helical tension clamp, includes preformed helical yarn and gold utensil, the gold utensil includes U type ring, ratchet subassembly, socket link plate and heart type ring, heart type ring one end with the preformed helical yarn is connected, the preformed helical yarn is connected with the cable, the heart type ring other end with the one end of socket link plate is connected, the socket link plate is that one end is the socket, and one end is the link fitting that the plate-type constitutes, socket link plate shape end with the heart type ring is connected, socket link plate socket end is connected with ratchet subassembly, ratchet subassembly can drive socket link plate and preformed helical yarn rotate, the ratchet subassembly other end with the U type ring is connected, the U type ring other end is connected on the pole, through preformed helical yarn and supporting connected gold utensil, can realize maintaining the reinforcement work to the preformed helical yarn again after the preformed helical yarn is installed.

As above a preformed helical strain clamp, the ratchet subassembly includes casing, ratchet and pawl, casing one end opening, the ratchet rotates through the pivot to be connected inside the casing, the pivot other end with socket end fixed connection of socket link plate, pawl one end rotates to be connected on shells inner wall, its other end with the ratchet contact is connected, the pawl can lock the ratchet, the casing other end with U type ring is connected.

Further, the pawl is located above the ratchet wheel, and the lower end of the pawl is in contact connection with the ratchet wheel.

Preferably, the rotation direction of the ratchet wheel is consistent with the winding direction of the outer layer preformed armor rods, and due to the arrangement, the ratchet wheel can drive the preformed armor rods to rotate in the rotation process, so that the winding pressure between the preformed armor rods and the cables is increased, the cables are tensioned, and the later maintenance and reinforcement work on the cables is realized.

As above a preformed helical strain clamp, the preformed helical includes link, outer stranded conductor and internal stranded conductor, the link is the U-shaped, the link with heart type ring joint, its other end with outer stranded conductor and internal stranded conductor are connected, outer stranded conductor is connected with the internal stranded conductor winding on the cable, sets up like this and makes the face connection is realized in being connected between cable and the preformed helical, and the internal surface of whole preformed helical all realizes being connected with the cable surface promptly, compares in the point connection that adopts among the prior art, and the face connection can reduce the atress to the cable surface, and in the cable junction process, the power that cable junction received all is even, reduces the wearing and tearing to the cable surface.

Preferably, outer stranded conductor with interior stranded conductor is the heliciform, outer stranded conductor and interior stranded conductor are connected side by a plurality of metal cords and are constituted, adopt spiral helicine pattern, make things convenient for the staff to twine the preformed armor rod on the cable, need not the scene and buckle preformed armor rod again, reduce staff's work load.

Further, outer stranded conductor with the winding internal diameter of interior stranded conductor is not less than the diameter of cable makes things convenient for outer hank silk and interior hank silk to twine on the cable, through the gold utensil with preformed armor rod cooperation use, with cable connection on the pole.

The pre-twisted strain clamp comprises a core-shaped ring, wherein the core-shaped ring comprises an upper clamping plate and a lower clamping plate, the upper clamping plate and the lower clamping plate are horizontally arranged, a supporting column is arranged between the upper clamping plate and the lower clamping plate, the supporting column is connected with the connecting end of a pre-twisted wire, the core-shaped ring is far away from one end of the supporting column and the plate-shaped end of the bowl head hanging plate are connected through bolts, and the pre-twisted wire and the bowl head hanging plate are connected through the core-shaped ring.

According to the pre-twisted strain clamp, the tail ends of the outer stranded wire and the inner stranded wire are provided with the fastening rings, the inner diameters of the fastening rings are not smaller than the diameters of the outer stranded wire, the inner stranded wire and the cable which are wound together, the tail ends of the outer stranded wire and the inner stranded wire are fastened on the surface of the cable by arranging the fastening rings at the tail ends, the tail ends of the outer stranded wire and the inner stranded wire are prevented from being loosened, the holding power of the cable is reduced, and the connection of the cable is influenced.

Compared with the prior art, the utility model has the advantages that:

1. compared with the prior art, the pre-twisted strain clamp has the advantages that the ratchet wheel assembly is added in the hardware fitting matched with the pre-twisted wire, the pre-twisted wire can rotate under the action of the ratchet wheel and the pawl in the ratchet wheel assembly, the holding force of the pre-twisted wire to a cable is increased, and the cable is connected more firmly.

2. According to the pre-twisted type strain clamp, the pre-twisted wire is rotated through the ratchet wheel assembly, the pre-twisted wire can be maintained in the later period, compared with the prior art, the pre-twisted wire cannot be maintained after being installed, the installed pre-twisted wire can be adjusted through the ratchet wheel assembly, and the requirement for the reserved length of the pre-twisted wire is met.

3. According to the pre-twisted type strain clamp, the pre-twisted wire can be directly disassembled by manually and reversely rotating the ratchet wheel assembly, the pre-twisted wire does not need to be disassembled by means of an external tool, and the replacement and the disassembly of the pre-twisted wire at the later stage are facilitated.

Drawings

The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model.

In the drawings:

FIG. 1 is a schematic view of a pre-twisted strain clamp connection;

FIG. 2 is a front view of the ratchet assembly;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a schematic view of a preformed armor rod structure;

FIG. 5 is a schematic view of a heart ring configuration;

the components represented by the reference numerals in the figures are:

1. u-shaped ring, 2, ratchet wheel subassembly, 21, ratchet wheel, 22, pawl, 23, casing, 3, socket link plate, 4, heart-shaped ring, 41, top plate, 42, bottom plate, 43, support column, 5, preformed armor rod, 51, outer stranded conductor, 52, link end, 53, interior stranded conductor, 6, cable, 7, clamping ring.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided so that this disclosure can be more completely understood and fully conveyed to those skilled in the art, and the present disclosure may be implemented in various forms without being limited to the embodiments set forth herein.

The directions "front and back", "left and right", etc. mentioned in the present invention are only used to express the relative positional relationship, and are not restricted by any specific directional references in practical application.

Examples

Referring to fig. 1, a pre-twisted strain clamp comprises a pre-twisted wire 5 and a fitting, wherein the fitting comprises a U-shaped ring 1, a ratchet component 2, a bowl-shaped hanging plate 3 and a heart-shaped ring 4, one end of the heart-shaped ring 4 is connected with the pre-twisted wire 5, the pre-twisted wire 5 is connected with a cable 6, the other end of the heart-shaped ring 4 is connected with one end of the bowl-shaped hanging plate 3, the bowl-shaped hanging plate 3 is a connecting fitting with one end being a socket and the other end being a plate shape, the plate-shaped end of the bowl-shaped hanging plate 3 is connected with the heart-shaped ring 4, the socket end of the bowl-shaped hanging plate 3 is connected with the ratchet component 2, the ratchet component 2 can drive the bowl-shaped hanging plate 3 and the pre-twisted wire 5 to rotate, the other end of the ratchet component 2 is connected with the U-shaped ring 1, the other end of the U-shaped ring 1 is connected with an electric pole, and after the pre-twisted wire 5 is installed, and then, the preformed armor rods 5 are maintained and reinforced, and compared with the prior art, the preformed armor rods 5 cannot be disassembled after being installed, so that the design is convenient for future maintenance.

Referring to fig. 5, in this embodiment, the core-shaped ring 4 includes an upper clamp plate 41 and a lower clamp plate 42, the upper clamp plate 41 and the lower clamp plate 42 are horizontally disposed, a support column 43 is disposed between the upper clamp plate 41 and the lower clamp plate 42, the support column 43 is connected to a connection end 52 of the preformed armor rods 5, one end of the core-shaped ring 4, which is far away from the support column 43, is connected to a plate-shaped end of the socket hanging plate 3 through a bolt, and the preformed armor rods 5 are connected to the socket hanging plate 3 through the core-shaped ring 4.

Referring to fig. 2 and 3, in the present embodiment, the ratchet assembly 2 includes a housing 23, a ratchet 21 and a pawl 22, one end of the housing 23 is open, the ratchet 21 is rotatably connected inside the housing 23 through a rotating shaft, the other end of the rotating shaft is fixedly connected with a socket end of the socket plate 3, one end of the pawl 22 is rotatably connected to an inner wall of the housing 23, the other end of the pawl is in contact connection with the ratchet 21, the pawl 22 can lock the ratchet 21, and the other end of the housing 23 is connected with the U-shaped ring 1.

Further, be equipped with the bearing on the 23 lateral walls of casing, the bearing with the pivot is connected, and the pivot can take place to rotate in the effect of bearing, fixedly connected with ratchet 21 in the pivot, ratchet 21 is in rotate under the effect of pivot, the other end of pivot with the cap nest section fixed connection of bowl head link plate 3, through the transmission of bowl head link plate 3 and heart type ring 4, ratchet 21 drives preformed armor rod 5 and rotates, in later maintenance, can strengthen the power of holding tightly between preformed armor rod 5 and the cable 6, makes cable 6 connect more firmly.

Furthermore, the pawl 22 is located above the ratchet wheel 21, the lower end of the pawl 22 is in contact connection with the ratchet wheel 21, the pawl 22 has a locking effect on the ratchet wheel 21, if the ratchet wheel 21 does not need to rotate reversely, the pawl 22 can lock the ratchet wheel 21, the state of the ratchet wheel 21 is guaranteed not to change, if the ratchet wheel 21 needs to rotate reversely, and when the preformed armor rods 5 are disassembled, the pawl 22 is located above the ratchet wheel 21, so that a worker can lift the pawl 22 conveniently, the ratchet wheel 21 rotates reversely, and the preformed armor rods 5 are disassembled from the cable 6.

Preferably, the rotation direction of the ratchet wheel 21 is consistent with the winding direction of the outer layer preformed armor rods 5, and through the arrangement, the ratchet wheel 21 can drive the preformed armor rods 5 to rotate in the rotation process, so that the winding pressure between the preformed armor rods 5 and the cables 6 is increased, the holding power of the preformed armor rods 5 to the cables 6 is larger, the cables 6 are tensioned, and the later maintenance and reinforcement work of the cables 6 is realized.

Referring to fig. 4, in this embodiment, the preformed armor rods 5 include a connection end 52, an outer stranded wire 51 and an inner stranded wire 53, the connection end 52 is U-shaped, the connection end 52 is connected to the core-shaped ring 4, the other end of the connection end is connected to the outer stranded wire 51 and the inner stranded wire 53, and the outer stranded wire 51 and the inner stranded wire 53 are wound on the cable 6, so that the connection between the cable 6 and the preformed armor rods 5 is realized through surface connection, that is, the inner surface of the whole preformed armor rods 5 is connected to the surface of the cable 6.

Preferably, outer stranded conductor 51 with interior stranded conductor 53 is the heliciform, outer stranded conductor 51 and interior stranded conductor 53 are connected side by a plurality of metal wires and are constituted, adopt spiral helicine pattern, make things convenient for the staff to twine preformed armor rods 5 on the cable, need not the scene and buckle preformed armor rods 5 again, reduce staff's work load, make things convenient for preformed armor rods 5 to install.

Further, outer stranded conductor 51 with the internal diameter that interior stranded conductor 53 twined is not less than the diameter of cable 6 makes things convenient for outer stranded conductor 51 and interior stranded conductor 53 to twine on cable 6, through the gold utensil with preformed armor rod 5 cooperation use, connects cable 6 on the pole.

Preferably, the outer stranded wire 51 and the inner stranded wire 53 are made of the same material as that of the cable, so that electrochemical corrosion between the preformed armor rod 5 and the cable 6 is avoided, and the cable has high corrosion resistance.

In this embodiment, the ends of the outer stranded wire 51 and the inner stranded wire 53 are provided with the fastening ring 7, the inner diameter of the fastening ring 7 is not smaller than the diameter of the outer stranded wire 51, the inner stranded wire 53 and the cable 6 which are wound together, and the ends of the outer stranded wire 51 and the inner stranded wire 53 are fastened on the surface of the cable 6 by arranging the fastening ring 7 at the end of the preformed armor rod 5, so that the ends of the outer stranded wire 51 and the inner stranded wire 53 are prevented from loosening, the holding force of the cable 6 is reduced, and the connection of the cable 6 is affected.

Specifically, the theory of operation of a preformed tension clamp does: before installing the preformed armor rods 5, firstly, the preformed armor rods 5 penetrate through the core-shaped ring 4, the connecting ends 52 on the preformed armor rods 5 are connected with the core-shaped ring 4, the preformed armor rods 5 are parallel to the cable 6, the inner stranded wires 53 of the preformed armor rods 5 are firstly wound on the surface of the cable 6, then the outer stranded wires 51 are wound on the surface of the cable 6, the preformed armor rods 51 are not crossed when being wound, gaps are even, the tail ends of the outer stranded wires 51 and the inner stranded wires 53 are wound in place, the fastening rings 7 are used for fastening the tail ends of the preformed armor rods 5 on the surface of the cable 6, and the ratchet wheels 21 are manually rotated to adjust the holding force between the preformed armor rods 5 and the cable 6, so that the connection between the preformed armor rods 5 and the cable 6 is more stable.

In the later period of use, if the cable 6 and the preformed armor rods 5 are loosened, the holding force between the preformed armor rods 5 and the cable 6 cannot be met, the holding force between the preformed armor rods 5 and the cable 6 can be increased only by manually rotating the ratchet wheel 21 and rotating the ratchet wheel 21, so that the preformed armor rods 5 and the cable 6 can be restored to the previous holding state without being detached, and then the cable is installed again.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or additions or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A pre-twisted strain clamp comprises a pre-twisted wire (5) and a hardware fitting, and is characterized in that, the hardware fitting comprises a U-shaped ring (1), a ratchet wheel component (2), a socket hanging plate (3) and a heart-shaped ring (4), one end of the heart-shaped ring (4) is connected with the preformed armor rods (5), the preformed armor rods (5) are connected with cables (6), the other end of the heart-shaped ring (4) is connected with the socket hanging plate (3), the socket hanging plate (3) is a connecting hardware fitting formed by a cap socket at one end and a plate at the other end, the plate-shaped end of the bowl head hanging plate (3) is connected with the heart-shaped ring (4), the cap socket end of the bowl head hanging plate (3) is connected with a ratchet wheel component (2), ratchet subassembly (2) can drive socket link plate and preformed armor rod rotate, ratchet subassembly (2) other end with U type ring (1) is connected, U type ring (1) other end is connected on the pole.

2. The preformed strain clamp as claimed in claim 1, wherein the ratchet assembly (2) comprises a shell (23), a ratchet (21) and a pawl (22), one end of the shell (23) is open, the ratchet (21) is rotatably connected to the inside of the shell (23) through a rotating shaft, the other end of the rotating shaft is fixedly connected with a socket end of the socket plate of the socket hanging plate (3), one end of the pawl (22) is rotatably connected to the inner wall of the shell (23), the other end of the pawl is in contact connection with the ratchet (21), the pawl (22) can lock the ratchet (21), and the other end of the shell (23) is connected with the U-shaped ring (1).

3. The pre-twisted strain clamp as claimed in claim 2, wherein the pawl (22) is located above the ratchet wheel (21), and the lower end of the pawl (22) is in contact connection with the ratchet wheel (21).

4. The preformed strain clamp as claimed in claim 3, wherein the ratchet wheel (21) rotates in the same direction as the preformed wire (5).

5. The preformed strain clamp as claimed in claim 1, wherein the preformed stranded wire (5) comprises a connecting end (52), an outer stranded wire (51) and an inner stranded wire (53), the connecting end (52) is U-shaped, the connecting end (52) is connected with the heart-shaped ring (4), the other end of the connecting end is connected with the outer stranded wire (51) and the inner stranded wire (53), and the outer stranded wire (51) and the inner stranded wire (53) are wound on the cable (6).

6. The preformed tension clamp according to claim 5, wherein the core-shaped ring (4) comprises an upper clamping plate (41) and a lower clamping plate (42), the upper clamping plate (41) and the lower clamping plate (42) are horizontally arranged, a supporting column (43) is arranged between the upper clamping plate (41) and the lower clamping plate (42), the supporting column (43) is connected with the connecting end (52) of the preformed armor rod (5), and one end, away from the supporting column (43), of the core-shaped ring (4) is connected with the plate-shaped end of the bowl-head hanging plate (3) through a bolt.

7. The pre-twisted strain clamp as claimed in claim 5, wherein the outer twisted wire (51) and the inner twisted wire (53) are helical, and the outer twisted wire (51) and the inner twisted wire (53) are formed by connecting a plurality of metal wires side by side.

8. The pre-twisted strain clamp of claim 5, wherein the inner diameter of the wound outer (51) and inner (53) strands is no less than the diameter of the cable (6).

9. The pre-twisted strain clamp as claimed in any one of claims 5 to 8, wherein the ends of the outer twisted wire (51) and the inner twisted wire (53) are provided with a fastening ring (7), and the inner diameter of the fastening ring (7) is not less than the diameter of the outer twisted wire (51), the inner twisted wire (53) and the cable (6) which are twisted together.