WO2022099718A1 - Wire hanging fitting and t-shaped composite insulating cross arm with wire hanging fitting - Google Patents

Abstract

A wire hanging fitting (3) and a T-shaped composite insulating cross arm with the wire hanging fitting (3). The wire hanging fitting (3) comprises a first end and a second end, wherein the second end is provided with a fixing groove (31); an opening of the fixing groove (31) is configured away from the first end; the fixing groove (31) is configured to fix a wire (8); an anti-slipping structure (32) is arranged on an outer wall at the opening of the fixing groove (31); and the anti-slipping structure (32) is configured to prevent a tying string (9) for tying the wire (8) from slipping off. The T-shaped composite insulating cross arm comprises the wire hanging fitting (3).

Description

Hanging wire fittings and T-shaped composite insulating cross-arm with wire hanging fittings

This application claims the priority of the Chinese Patent Application No. 202022608684.7 filed with the China Patent Office on November 12, 2020, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of power transmission and transformation, for example, to a wire-hanging fitting and a T-shaped composite insulating cross arm having the wire-hanging fitting.

Background technique

Lightning-induced overvoltage is the main factor leading to disconnection of overhead lines in distribution network. Improving the insulation level of the line is an important means to improve the lightning resistance level of the overhead line of the distribution network, especially to avoid the tripping and disconnection of the line due to induced lightning strikes. With the development of composite material manufacturing technology, the electrical and mechanical properties of composite materials have been greatly improved, and the use of composite insulating crossarms for lightning protection transformation of lines has attracted increasing attention. The application of the distribution network composite cross arm can greatly improve the lightning resistance level of the line.

There are wire fixing holes with openings facing upwards on the composite cross-arm wire hanging fittings. For the working conditions with large height difference, that is, there is a large height difference between the wire hanging fittings in the height direction, the wires fixed on the wire fixing holes The fixing force of the wire is concentrated on the binding wire used to bind and fix the wire, so that the stability of the wire fixing is poor, and the binding wire is easily displaced, which makes the wire fixing unreliable.

SUMMARY OF THE INVENTION

The present application proposes a wire-hanging fitting and a T-shaped composite insulating cross-arm with the wire-hanging fitting, which aims to solve the problem of unreliable wire fixing.

A wire hanging fitting is proposed, comprising: a first end and a second end; the second end is provided with a fixing slot, the opening of the fixing slot is arranged away from the first end, and the fixing slot is arranged for fixing Conductor; the outer wall of the opening of the fixing slot is provided with an anti-falling structure, and the anti-falling structure is arranged to prevent the binding rope binding the conducting wire from falling off.

A T-shaped composite insulating cross arm is also proposed, which includes the above-mentioned wire hanging fittings.

Description of drawings

Fig. 1 is the structural representation of a kind of T-shaped composite insulating cross arm provided by the embodiment of the application;

2 is a schematic structural diagram of another T-shaped composite insulating cross arm provided by the embodiment of the application;

3 is a schematic cross-sectional view of an insulating mandrel provided in an embodiment of the application;

4 is a schematic structural diagram of a wire-hanging fitting provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a wire-hanging fitting provided with an embodiment of the present application being bound with a wire;

FIG. 6 is a schematic structural diagram of another wire-hanging metal fitting provided in an embodiment of the present application with wires bound;

FIG. 7 is a schematic structural diagram of the use state of a wire hanging fitting provided in an embodiment of the present application under a working condition of large height difference;

FIG. 8 is a schematic structural diagram of a wire-hanging fitting in a use state at a first corner provided by an embodiment of the present application;

9 is a schematic structural diagram of the use state of a wire-hanging fitting provided in an embodiment of the present application under a second corner;

FIG. 10 is a schematic structural diagram of a T-shaped composite insulating cross-arm arrangement provided in an embodiment of the application;

11 is a schematic structural diagram of a T-shaped composite insulating cross arm delta arrangement provided by an embodiment of the application;

FIG. 12 is a schematic structural diagram of a double vertical arrangement of a T-shaped composite insulating cross arm provided in an embodiment of the present application.

Detailed ways

Exemplary embodiments of the present application will be described below with reference to the accompanying drawings. Exemplary embodiments of the present application are shown in the accompanying drawings. These examples are provided to enable an understanding of the present application. The present application will be described below with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to FIGS. 1 to 2 , FIGS. 1 to 2 show the structure of the T-shaped composite insulating cross arm provided by the embodiment of the present application, and FIG. 11 is a triangular arrangement of the T-shaped composite insulating cross arm provided by the embodiment of the present application. Schematic diagram of the structure. As shown in FIG. 1 , FIG. 2 and FIG. 11 , the T-shaped composite insulating cross-arm includes: an insulating core rod 1 , a jacket 2 , a wire hanging fitting 3 and a connecting fitting 4 . Wherein, the outer sleeve 2 is sleeved on the outside of the insulating mandrel 1, and the first end of the outer sleeve 2 (the right end as shown in FIG. 1 ) is inserted and bonded to the first end of the wire hanging fitting 3 (as shown in FIG. 1 ). In the left end), the second end (the left end as shown in FIG. 1 ) of the outer casing 2 is inserted and bonded in the first end (the right end as shown in FIG. 1 ) of the connecting fitting 4, and the connecting fitting 4 is provided with a There is a hoop 5 to be clamped on the utility pole 6 . The insulating mandrel 1 and the jacket 2 are taken as a whole, which are respectively inserted and bonded to the inside of the wire hanging fitting 3 and the inside of the connecting fitting 4. The wire hanging fitting 3 can facilitate the clamping of the wire and the installation and fixation of the pay-off pulley. . Connecting the second end of the fitting 4 can realize the connection between the two insulating mandrels 1, and can also realize the clamping of the insulating mandrel 1 by connecting the hoop 5 on the fitting 4, and the T-shaped composite insulating cross arm can be Fixed to the utility pole 6 . The outer jacket 2 can be fixed on the insulating mandrel 1 by injection, extrusion through the umbrella or molding, etc., which effectively improves the ability of the insulating cross arm to resist bird pecks, wind and sand and certain external force damage. The insulating core rod 1 can be made of fiber-reinforced resin material, the outer jacket 2 can be made of silicone rubber, modified epoxy resin, etc., and the connecting fittings 4 and the wire fittings 3 are aluminum alloy fittings, which can be crimped, glued, etc. The process is fixed at both ends of the insulating mandrel 1, and the aluminum alloy fittings have excellent insulation performance, reducing line operation and maintenance costs.

In this embodiment, the hoop 5 is connected to the connecting hardware 4 through the I-shaped connecting plate 7 . A T-bolt mounting hole may be provided on the side of the connecting fitting 4, and the T-bolt is fixed to the I-shaped connecting plate 7. The hoop 5 is connected with the I-shaped connecting plate 7 and is arranged to fix the cross arm on the utility pole 6 . Wherein, the hoop 5 and the I-shaped connecting plate 7 can be cast steel materials. The I-shaped connecting plate 7 is also provided with a mounting hole (not shown in the figure), which is configured to connect the composite insulator 10 .

Referring to Figure 3, the section of the insulating mandrel 1 is T-shaped, so as to reduce the cross-sectional area, weight and cost of the product on the premise of ensuring its own bending resistance and internal insulation performance. Compared with the insulating cross-arm with circular cross-section, the cross-section bending resistance and pressure stability performance of the T-section insulating mandrel 1 are more excellent. By adjusting the cross-section size, the vertical mechanical load of the line under various working conditions can be met, and the composite material can be improved at the same time. Utilization rate, to ensure the anti-foreign body performance of the cross arm. Preferably, the top of the insulating mandrel 1 is an arc structure, the top arc radius R of the T-shaped section of the insulating mandrel 1 is 30mm-80mm, the height H of the T-shaped section of the insulating mandrel 1 is 60mm-100mm, and the insulation The width L of the T-shaped section of the mandrel 1 is 40 mm to 80 mm, and the edges and corners of the insulating mandrel 1 are all smoothly transitioned. The corners of the insulating mandrel 1 are rounded to reduce the accumulation of foreign objects such as bird's nests, which can minimize the weight of the product. During implementation, the diameter of the rounded corners can be determined according to the actual situation, which is not limited in this embodiment. The cross-section of the wire-hanging fitting 3 and the cross-section of the connecting fitting 4 are both T-shaped, and the cross-sectional dimensions of the two are matched with the cross-sectional dimension of the insulating core rod 1 .

Referring to FIG. 1 to FIG. 2 , the jacket 2 may include: a cover body 21 with two ends open and a plurality of umbrella skirts 22 . The sleeve body 21 is sleeved on the outside of the insulating mandrel 1, and a plurality of sheds 22 are sleeved outside the sleeve body 21, and the plurality of sheds 22 are evenly spaced along the length direction of the sleeve body 21, and the umbrella skirts 22 can be Increase the creepage distance of the split composite cross arm, and has the function of blocking water. During implementation, the section of the outer jacket 2 and the section of the shed 22 are both T-shaped which is compatible with the insulating mandrel 1 .

1 to 2, at least one end of the connecting fitting 4 may be provided with a second sealing boss 41 to seal the gap between the connecting fitting 4 and the insulating mandrel 1 or the outer casing 2. In this embodiment, the insulating mandrel 1 and The entire end of the outer casing 2 is inserted and bonded in the connecting fitting 4 as an example for illustration. The provision of the second sealing boss 41 can improve the sealing performance between the connecting fitting 4 and the cross-section of the casing 2 . The second sealing boss 41 can be provided along the entire circumference of the connecting hardware 4 to further improve its sealing effect.

Referring to FIG. 4 to FIG. 9 , FIG. 4 to FIG. 9 illustrate the structure of the wire hanging fitting provided by the embodiment of the present application. As shown in the figure, the second end (the right end as shown in FIG. 4 ) of the wire-hanging fitting 3 is provided with a fixing groove 31 for fixing the wire 8, and the opening of the fixing groove 31 is arranged away from the first end of the wire-hanging fitting 3 (as shown in the figure). 4), the outer wall of the opening of the fixing slot 31 (the top wall as shown in FIG. 4) is provided with an anti-falling structure 32, which is arranged to prevent the binding rope 9 of the binding wire 8 from falling off. The opening of the fixing slot 31 is arranged to open to the right along the axial direction of the wire hanging fitting 3 , so that the wire 8 is clamped in the fixing slot 31 . As shown in FIG. 7 , when there is a large height difference, the wire 8 can press against the support arm on one side of the fixing groove 31 and be fixed by the binding rope 9 , and then the wire 8 can be fixed by the wire hanging hardware 3 . , to avoid the instability of the fixation of the wire 8 caused by the rupture of the binding rope 9 , that is, to improve the stability of the fixation of the wire 8 . The provision of the anti-dropping structure 32 can prevent the binding rope 9 from falling off the second end of the wire hanging hardware 3 , thereby ensuring the stability of the binding rope 9 to the wire hanging hardware 3 , thereby further ensuring the stability of the wire 8 being fixed. Wherein, the fixing groove 31 may have a C-shaped structure, so that the C-shaped structure realizes the clamping of the wire 8 so as to support and fix the wire 8 . At the same time, the inner wall of the fixing slot 31 has an arc structure, which is convenient for the fixing of the wire. As shown in FIGS. 8 and 9 , when there is a turning angle, the wire 8 can be pressed and contacted on the inner wall of the closed end of the fixing groove 31 or the clamping section on the side of the opening, and is fixed by the binding rope 9 , and then can pass through the wire hanging hardware 3 . Bearing the fixation of the wire 8.

Referring to FIGS. 4 to 6 , the first end (the right end as shown in FIG. 6 ) of the hanging wire fitting 3 is provided with an insertion hole 33 along its axial direction, which is arranged to be inserted into the insulating core of the T-shaped composite insulating crossarm Outside of rod 1 or jacket 2. The cross-sectional shape of the insertion hole 33 is adapted to the cross-sectional shape of the insulating mandrel 1. For example, the cross-sectional shape of the insulating mandrel 1 is T-shaped, and the cross-sectional shape of the insertion hole 33 is also T-shaped, so that the One end is inserted into the insertion hole 33 . In order to improve the tightness between the hanging wire fitting 3 and its inner jacket 2 or the insulating mandrel 1, the first end of the wire hanging fitting 3 is provided with a first sealing boss 34 to seal the wire hanging fitting 3 and the insulating cross-arm. The gap between 2 or the gap between the hanging wire fittings 3 and the jacket 2. In one embodiment, the first sealing boss 34 may be disposed along the entire circumference of the wire hanging fitting 3 to further improve its sealing effect.

Referring to FIG. 4 , the second end of the wire hanging fitting 3 is further provided with a fixing hole 35 on the lower side of the opening of the fixing groove 31 for fixing the wire pay-off pulley, so as to facilitate the installation and fixation of the wire pay-off pulley. During the pay-off construction, the wire position is higher than the insulating mandrel 1. When the wire 8 is removed by the pay-off pulley and fixed to the insulating mandrel 1, the wire 8 is placed on the insulating mandrel 1 from top to bottom, so that the line is more convenient.

Referring to FIG. 10 to FIG. 12 , FIG. 10 to FIG. 12 show the structure of the T-shaped composite insulating cross arm arrangement provided by the embodiment of the present application. As shown in the figure, the T-shaped composite insulating cross-arm provided in this embodiment can be arranged in a variety of ways, and can be arranged in an upper-shaped, triangular, and double-vertical arrangement.

As shown in Figure 10, the utility pole 6 is provided with an upper and lower double-layer horizontal T-type composite insulating cross-arm, the structure of the upper-layer horizontal T-type composite insulating cross-arm is the same as that of the T-type composite insulating cross-arm, and the lower horizontal T-type composite insulating cross-arm has the same structure. The arm structure includes two T-shaped composite insulating cross arms connected in series, and the two T-shaped composite insulating cross arms in series share a connecting fitting 4 and are clamped on the utility pole 6 through a hoop 5 to form an upper-shaped arrangement structure.

As shown in FIG. 11 , two T-shaped composite insulating cross-arms connected in series are arranged on the utility pole 6, and the two T-shaped composite insulating cross-arms connected in series share a connecting fitting 4, and a composite insulator 10 is connected above the connecting fitting 4. , to form a triangular arrangement.

As shown in FIG. 12 , the utility pole 6 is provided with a multi-layer structure, and each layer structure includes two T-shaped composite insulating cross arms connected in series. The hoop 5 is clamped to the pole 6 to form a double vertical arrangement. In this embodiment, three layers are used as an example for description, and other numbers such as two layers or three layers are also possible, which are not limited in this embodiment.

In the hanging wire fitting and the T-shaped composite insulating cross-arm provided in this embodiment, the second end of the wire hanging fitting is provided with a fixing groove for fixing the wire, and the opening of the fixing groove is set away from the first end of the wire hanging fitting so that the wire can be fixed. Snap in the fixing slot. When there is a large height difference, the wire can press against the support arm on one side of the fixing groove and be fixed by the binding rope, and then the wire can be fixed by the wire hanging hardware, which improves the stability of the wire fixing. The outer wall of the opening of the fixing slot is provided with an anti-dropping structure, which can prevent the binding rope from falling off the second end of the wire-hanging hardware, thereby ensuring the stability of the binding rope to the wire-hanging hardware, thereby further ensuring the stability of the wire fixing. Make sure the wire is fixed securely.

In the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the direction or the positional relationship of the terms based on the direction or position shown in the drawings relationship, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation on the present application.

In the description of this application, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components. The meanings of the above terms in the present application can be understood according to the situation.

Claims (10)

1. A wire hanging fitting, comprising: a first end and a second end;

   The second end is provided with a fixing slot, the opening of the fixing slot is arranged away from the first end, and the fixing slot is arranged to fix the wire;

   The outer wall of the opening of the fixing groove is provided with an anti-falling structure, and the anti-falling structure is arranged to prevent the binding rope binding the wire from falling off.
2. The wire-hanging fitting according to claim 1, wherein the fixing groove is a C-shaped structure.
3. The wire hanging fitting according to claim 1 or 2, wherein the anti-dropping structure is a boss structure.
4. The wire hanging fitting according to claim 1 or 2, wherein the first end is provided with an insertion hole in a T-shaped structure along the axial direction of the wire hanging fitting, and the insertion hole is set to be sleeved on the The outside of the insulating mandrel or jacket.
5. The wire hanging fitting according to claim 1 or 2, wherein the first end is provided with a first sealing boss, and the first sealing boss is arranged to seal the gap between the wire hanging fitting and the insulating mandrel. The gap or the gap between the hanger and the jacket.
6. The wire-hanging fitting according to claim 1 or 2, wherein the second end is further provided with a fixing hole on the lower side of the opening of the fixing groove, and the fixing hole is set to fix the wire-paying pulley.
7. A T-shaped composite insulating cross arm, comprising the wire hanging fitting according to any one of claims 1 to 6.
8. The T-shaped composite insulating cross arm according to claim 7, further comprising:

   an insulating mandrel, the section of the insulating mandrel is T-shaped;

   an outer sleeve, the outer sleeve is sleeved on the outside of the insulating mandrel, and the first end of the outer sleeve is adhered to the first end of the wire hanging fitting;

   Connecting hardware, one end of the connecting hardware is sleeved on the outside of the second end of the outer jacket, and the connecting hardware is provided with a hoop, and the hoop is set to clamp the T-shaped composite insulating cross-arm. on telephone poles.
9. The T-shaped composite insulating cross arm according to claim 8, wherein the hoop is connected to the connecting fitting through an I-shaped connecting plate.
10. The T-shaped composite insulating cross arm according to claim 9, wherein the I-shaped connecting plate is provided with a mounting hole for connecting the composite insulator.

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