CN214280854U - Box-type boltless connecting pipe for power transmission cable tower - Google Patents

Abstract

The invention discloses a grooved box type boltless connecting pipe for a power transmission cable tower, which comprises: the device comprises a first circular tube (1), a welding part (2) and a second circular tube (3); the first round pipe (1), the welding part (2) and the second round pipe (3) are sequentially connected along the same vertical axis, the side face of the first round pipe (1) is fixedly connected with the lower end face of the welding part (2), and the side face of the second round pipe (3) is fixedly connected with the upper end face of the welding part (2); the first round pipe (1) is a drawer type groove box and comprises a groove box body and a groove box cover, and the groove box cover is arranged on the side surface of the first round pipe (1) far away from the welding part (2). The invention can reduce the use number of bolts during connection and reduce the probability of overheating defects caused by bolt corrosion; meanwhile, due to the grooving design, the connecting pipe is replaced without disconnecting the lower lead, and the efficiency of wire clamp replacement and maintenance work is improved.

Description

Box-type boltless connecting pipe for power transmission cable tower

Technical Field

The invention relates to the field of transmission cables, in particular to a box-type bolt-free connecting pipe for a transmission cable tower.

Background

With the development of cities, the number of overhead line ground-entering projects is increased, and the number of outdoor cable terminal towers is also increased. At present, for reducing the problem of overheating of the contact of the mixed line, the drainage wire is added to the cable tower in the current transformation work, and the number of the connecting points of the lead and the cable copper bar is increased to reduce the number of times of overheating of the contact.

In the transformation maintenance work of increasing the drainage wire to having the pylon, with two positive and negative butt joints of L molded lines clamp, utilize the bolt fastening to constitute connecting device, with circuit downlead disconnection access connecting device one side pipe and crimping, opposite side pipe and drainage wire crimping, the terminal of drainage wire passes through the terminal and is connected with the copper bar to realize the increase of drainage wire between overhead line and the cable copper bar. By increasing the number of the connecting points of the down leads and the copper bars, the problem of contact overheating at the connecting position of the down leads and the copper bars can be effectively reduced. Meanwhile, as the L-shaped wire clamp is of an integral structure, when the L-shaped wire clamp needs to be replaced, the down lead needs to be cut off first, a new wire clamp is sleeved in the L-shaped wire clamp for crimping, and the down lead is recovered for connection, so that the workload of replacing the L-shaped wire clamp in high altitude work is increased, and dangerous points are increased.

Because it is coastal to link greatly, the salinity is heavier in the air, humidity is great, lead to two L molded lines clamp junction bolts to take place the corrosion easily, still occasionally there is the hot spot to appear, when overheated defect appears in terminal tower bolt corrosion, need apply for to have a power failure and change processing such as bolt, consuming time and power, consequently, it examines room through improving cable accessories to link greatly power supply company cable fortune, design a boxlike nothing bolted connection pipe of cell for transmission cable tower uses, an efficiency for improving the fastener and changing maintenance work, reduce the overheated condition because of the bolt corrosion appears.

The most important and key technical problems are as follows: increase the drainage wire between the lower lead wire of pylon and the copper bar, the overheated problem of reduction lower lead wire fastener and copper bar junction that can be fine, nevertheless drainage wire still need fix with the bolt with lower pin junction at present, and the area coastal is greatly even, and salinity is heavier, humidity is great in the air, and the bolt corrosion condition is serious, leads to bolt connection position still to have the hot spot to appear occasionally.

The secondary problems are: the L type fastener that uses at present is overall structure, does not have the fluting design, when appearing quality problems with downlead connection L type fastener and need changing, need break off the downlead and change the L type fastener of renewal and resume downlead connection for high altitude construction work load increases, dangerous spot increases.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a box-type bolt-free connecting pipe for a power transmission cable tower, so that the use of bolts is reduced, the probability of overheating defects caused by bolt corrosion is reduced, and meanwhile, the efficiency of wire clamp replacement work is improved through a slotted design.

In a preferable mode, the first round pipe and the second round pipe are of cylindrical structures, and the length and the inner diameter and the outer diameter of the first round pipe and the second round pipe are the same.

In order to achieve the above object, the present invention provides a channel box type boltless connection tube for a power transmission cable tower, comprising: the welding device comprises a first round pipe, a welding part and a second round pipe; the first round pipe, the welding part and the second round pipe are sequentially connected along the same vertical axis, the side face of the first round pipe is fixedly connected with the lower end face of the welding part, and the side face of the second round pipe is fixedly connected with the upper end face of the welding part.

In a preferable mode, the first round pipe and the second round pipe are of cylindrical structures, and the length and the inner diameter and the outer diameter of the first round pipe and the second round pipe are the same.

Under the preferred mode, the cuboid structure welding spare up end and terminal surface down set up semicircular groove, semicircular groove's diameter is the same with the external diameter of first pipe, second pipe just the length of welding spare is half of the length of first pipe, second pipe, the preceding terminal surface and the rear end face of welding spare are aligned with the bottom surface of first pipe, second pipe respectively.

Under the preferred mode, first pipe is drawer type groove box and includes groove box body, groove box lid, keeps away from the first pipe side of welding piece and offers groove box lid, groove box lid and groove box body are along the axial sliding connection of first pipe.

The invention has the beneficial effects that: the invention replaces the bolt fixed connection with welding on the basis of the existing equipment, can reduce the using amount of bolts during connection, reduce the probability of overheating defects caused by bolt corrosion, and increase the number of connecting points of the lower lead of the overhead line and the copper bar on the cable terminal tower; meanwhile, due to the grooving design, the connecting pipe is replaced without disconnecting the lower lead, and the efficiency of wire clamp replacement and maintenance work is improved.

Drawings

FIG. 1 is a side view of a channel box type boltless connection tube structure;

FIG. 2 is a top view of a channel type boltless connection tube structure;

FIG. 3 is a front view of a channel type boltless attachment tube structure;

FIG. 4 is a schematic structural view of a first round tube slot box cover with a slot box type boltless connecting tube being slotted;

FIG. 5 is a schematic structural diagram of a first round tube of a grooved box type boltless connecting tube;

fig. 6 is a stress analysis diagram of the first circular tube groove box cover of the groove box type boltless connecting pipe.

Detailed Description

As shown in fig. 1, 2 and 3, the invention relates to a channel-type boltless connection tube for electric power transmission towers, comprising: a first round pipe 1, a welding part 2 and a second round pipe 3; first pipe 1, welding 2 and second pipe 3 connect gradually along same vertical axis, the side of first pipe 1 and the lower terminal surface fixed connection of welding 2, the side of second pipe 3 and the up end fixed connection of welding 2, welding 2 and first pipe 1, second pipe 3 carry out fixed connection through the welded mode during specific application.

As shown in fig. 3, the first round tube 1 and the second round tube 3 are cylindrical structures and have the same length and the same inner and outer diameters.

As shown in fig. 3, semicircular groove is seted up to the welding 2 up end and the lower terminal surface of cuboid structure, semicircular groove's diameter is the same with the external diameter of first pipe 1, second pipe 3, and the outer parallel and level of following outward with two pipes is followed outward to welding 2 promptly, just the length of welding 2 is half of the length of first pipe 1, second pipe 3 to guarantee two pipe coupling parts's mechanical strength, the preceding terminal surface and the rear end face of welding 2 are aligned with the bottom surface of first pipe 1, second pipe 3 respectively.

As shown in fig. 4 and 5, the first circular tube 1 is a drawer-type groove box and includes a groove box body and a groove box cover, the side surface of the first circular tube 1 away from the welding member 2 is provided with the groove box cover, and the groove box cover and the groove box body are connected in a sliding manner along the axial direction of the first circular tube 1. The box cover of the groove box is a shadow part in 4 and 5, and the box cover of the groove box can be axially drawn out from the first round pipe 1.

The radial cross-sectional shape of groove box lid is similar to trapezoidally, and after the first pipe 1 was gone into to the lead wire card down, when the groove box lid closed, the outside squeezing action of accessible lead wire made the groove box lid hug closely on the slant interface of groove box body, can not appear the problem of dropping after loosening the both hands, liberated both hands and carried out hydraulic pressure operation. The slotting structure is shown in figure 4, the size of the slot opening is equal to the inner diameter of the round tube so as to ensure that the lower lead can be accessed, the lead can be inserted by opening the box cover of the slot box, and the box cover of the slot box is closed and is tightly pressed by a hydraulic device.

Fig. 6 is a stress analysis diagram of the cover of the trough box, wherein the trough box is grooved at an inclined angle, so that the cover of the trough box is tightly attached to an inclined interface of the box body of the trough box, the problem of falling can be avoided after two hands are loosened, and the two hands are liberated to carry out hydraulic operation. Taking the left side surface as an example, when the lower lead is inserted into the first round tube 1, the lower lead generates an outward force F1 to the box cover, and the box body generates an inward force F2 to the box cover, so that the box cover will not fall off after the hand is loosened.

When in use, the drainage wire is firstly inserted into the side of the second round pipe 3 for crimping, and the other side of the drainage wire is crimped with the connecting terminal; secondly, opening a box cover of a groove box of the first round pipe 1 after climbing the tower, and clamping a lower lead of the overhead line into the first round pipe 1; closing the box cover of the groove box, forming a hole at a proper position of the cable copper bar, and fixing the connecting terminal by using a bolt; and finally, according to the length of the drainage wire, determining the fixed position of the connecting pipe and tightly pressing the connecting pipe by using a hydraulic device.

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 person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims (4)

1. A channel-box type boltless connection tube for a transmission pylon, comprising: the device comprises a first circular tube (1), a welding part (2) and a second circular tube (3); first pipe (1), welding (2) and second pipe (3) connect gradually along same vertical axis, the side of first pipe (1) and the lower terminal surface fixed connection of welding (2), the side of second pipe (3) and the up end fixed connection of welding (2).

2. The channel-box type boltless connection tube for electric transmission towers according to claim 1, characterized in that said first circular tube (1) and second circular tube (3) are of cylindrical structure and are of the same length, inner and outer diameter.

3. The channel-box type boltless connecting pipe for the power transmission cable tower according to claim 1, wherein the upper end surface and the lower end surface of the welding member (2) of the rectangular parallelepiped structure are provided with semicircular grooves, the diameter of the semicircular grooves is the same as the outer diameter of the first circular pipe (1) and the second circular pipe (3), the length of the welding member (2) is half of the length of the first circular pipe (1) and the second circular pipe (3), and the front end surface and the rear end surface of the welding member (2) are respectively aligned with the bottom surfaces of the first circular pipe (1) and the second circular pipe (3).

4. The channel-box type boltless connection tube for an electric transmission cable tower according to claim 1, characterized in that the first circular tube (1) is a drawer-type channel box and comprises a channel box body, a channel box cover, the side of the first circular tube (1) remote from the welded part (2) being provided with a channel box cover, the channel box cover and the channel box body being slidably connected in the axial direction of the first circular tube (1).

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