CN113922317B - Transmission cable lead-in ground pipe sealing device - Google Patents

Abstract

The invention discloses a power transmission cable lead-in ground pipe plugging device, which comprises a shell and a fixed ring, wherein the top of the shell is provided with a power transmission cable insertion hole, the bottom of the shell is provided with a ground pipe insertion hole, an elastic sealing piece is also arranged in the shell, an air bag is arranged in the sealing piece, the sealing piece is annular and comprises an upper through hole and a lower through hole which are communicated, the upper through hole is connected with the power transmission cable insertion hole, the lower through hole is connected with the ground pipe insertion hole, the inner diameter of the lower through hole is larger than the inner diameter of the upper through hole, a step is formed at the joint of the lower through hole and the upper through hole, and an extrusion part is arranged at the step; the fixed ring is fixed on the ground pipe, the fixed ring is provided with a bolt, and the shell is provided with a screw hole matched with the bolt; the top of the ground pipe is extruded to the extrusion part by screwing the bolt, so that the volume of the air bag is reduced, and the upper through hole and the power transmission cable and the lower through hole and the ground pipe are tightly contacted to form a seal. The invention has the advantages that: the device has simple structure and convenient operation, and can ensure the tightness of the orifice of the ground pipe for a long time.

Description

Transmission cable lead-in ground pipe sealing device

technical field

The invention relates to a plugging device for a ground pipe leading into a power transmission cable.

Background technique

In the laying stage of power transmission cables, some areas are erected on high-altitude electric poles, and some areas need to go through underground pipelines. The cable is passed through the ground pipe. In order to facilitate the penetration of power transmission cables, the diameter of the ground pipe is generally larger than that of the power transmission cable. If the mouth of the ground pipe is not closed after the power transmission cable is penetrated, small animals or rainwater will enter the ground pipe, causing ground damage. Water accumulation in the pipe or other safety hazards. At present, plasticine is used for sealing, and the plasticine is easy to dry in the outdoor environment, causing cracks and falling off to fail.

Contents of the invention

The object of the present invention is to provide a plugging device for a power transmission cable leading into a ground pipe, which can effectively solve the problem that the existing ground pipe entrance is prone to failure.

In order to solve the above-mentioned technical problems, the present invention is achieved through the following technical proposals: the plugging device for introducing the power transmission cable into the ground pipe includes a housing and a fixing ring, the top of the housing is provided with a power transmission cable insertion hole, and the bottom of the housing is opened. There is a ground pipe insertion hole, and an elastic seal is provided in the housing, and an air bag is arranged in the seal. The seal is ring-shaped and includes an upper through hole and a lower through hole that communicate with each other. The upper through hole is connected to the power transmission The cable insertion holes are connected, the lower through hole is connected with the ground pipe insertion hole, the inner diameter of the lower through hole is larger than the inner diameter of the upper through hole, and a step is formed at the junction of the lower through hole and the upper through hole, and the step There is an extrusion part;

The fixing ring is fixed on the ground pipe, the fixing ring is provided with bolts, and the casing is provided with screw holes matching with the bolts;

By tightening the bolts, the top of the ground pipe squeezes the extruded part, so that the volume of the air bag is reduced, and the tight contact between the upper through hole and the power transmission cable, and between the lower through hole and the ground pipe forms a seal.

Preferably, the inner wall of the upper through hole is provided with a plurality of first protruding rings coaxial with the upper through hole, and through the plurality of first protruding rings, a plurality of channels are formed between the power transmission cable and the sealing member after being inserted. Sealed to improve airtightness.

Preferably, the inner wall of the lower through hole is provided with a plurality of second protruding rings coaxial with the lower through hole, through the plurality of second protruding rings, multiple seals are formed with the side wall of the ground pipe inserted, Ensure tightness.

Preferably, the extruding part is made of hard material, and the cross section of the extruding part is a door-shaped structure with the opening downward. Enough pressure is generated after extrusion, so that sufficient sealing pressure is formed between the seal and the transmission cable and ground pipe.

Preferably, the fixing ring is a hoop, the outer wall of the fixing ring is provided with a first fixing block, the first fixing block is provided with fixing holes for bolts to pass through, and the outer wall of the housing is A second fixing block is provided, the screw hole is arranged on the second fixing block, and the hoop can be fixedly connected with the ground pipe so that sufficient pressure is generated to squeeze the airbag when the bolt is tightened.

Compared with the prior art, the advantages of the present invention are: by adding seals to form a seal with the inserted power cables and ground pipes, the problem of easy failure of the current plasticine plugging is solved, and the casing ensures that the entire plugging The rigidity of the device can resist external impact, and the upper through hole is attached to the transmission cable, and the lower through hole is attached to the outer wall of the ground pipe. After the ground pipe is inserted, the distance between the shell and the fixing ring is shortened by bolts. Make the top of the ground pipe bear against the extruded part, squeeze the air bag, and increase the airtightness between the seal, the transmission cable and the ground pipe through the change of the air pressure in the air bag, so as to ensure that rainwater or small animals will not enter the ground pipe. The device has a simple structure and is easy to operate, and can ensure the airtightness of the mouth of the ground pipe for a long time.

Description of drawings

Fig. 1 is a schematic structural diagram of a plugging device for a transmission cable lead-in ground pipe according to the present invention.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientation or position shown in the drawings The positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Referring to Fig. 1, it is an embodiment of the power transmission cable lead-in ground pipe sealing device of the present invention. The power transmission cable lead-in ground pipe sealing device includes a housing 1 and a fixing ring 2, and the top of the housing 1 has a power transmission cable inserted into it. There is a ground pipe insertion hole at the bottom of the housing 1. An elastic seal 3 is also provided in the housing 1. The seal 3 is made of elastic rubber. The seal 3 is provided with an air bag 4. The seal 3 It is ring-shaped and includes an upper through-hole 5 and a lower through-hole 6 that communicate with each other. The upper through-hole 5 is connected with the power transmission cable insertion hole, and the lower through-hole 6 is connected with the ground pipe insertion hole. The inner diameter of the lower through-hole 6 is larger than The inner diameter of the upper through hole 5, the junction of the lower through hole 6 and the upper through hole 5 forms a step, and the step is provided with an extrusion part 7;

The fixed ring 2 is fixed on the ground pipe, the fixed ring 2 is provided with bolts 8, and the shell is provided with screw holes matching the bolts 8;

By tightening the bolts 8, the top of the ground pipe squeezes the extrusion part 7, so that the volume of the air bag 4 is reduced, and the tight contact between the upper through hole 5 and the power transmission cable, and between the lower through hole 6 and the ground pipe forms a seal.

The casing 1 ensures the rigidity of the entire sealing device and resists external impacts, and the upper through hole 5 is attached to the transmission cable, and the lower through hole 6 is attached to the outer wall of the ground pipe. After the ground pipe is inserted, the bolt is used to 8 Shorten the distance between the shell 1 and the fixed ring 2, make the top of the ground pipe withstand the extrusion part 7, squeeze the air bag 4, and increase the gap between the seal 3 and the transmission cable and the ground pipe through the change of air pressure in the air bag 4. The airtightness ensures that rainwater or small animals will not enter the ground pipe.

To form close contact between the upper through hole 5 and the power transmission cable, and between the lower through hole 6 and the ground pipe, an interference fit can be used. Of course, in order to prevent the interference fit from becoming invalid after a long time, in order to further strengthen the power transmission The tightness between the cable and the upper through hole 5, the inner wall of the upper through hole 5 is provided with a plurality of first convex rings 9 coaxial with the upper through hole 5, and the inner wall of the lower through hole 6 is provided with a plurality of The second protruding ring 10 coaxial with the lower through hole 6 passes through the first protruding ring 9 and the second protruding ring 10 to form multiple seals to improve the sealing performance.

The extruding part 7 is made of hard material, such as hard plastic, and the cross section of the extruding part 7 is a door-shaped structure with the opening downward. Through the extruding part 7 of this structure, after the ground pipe is inserted , increase the contact area between the extrusion part 7 and the air bag 4, generate sufficient air pressure, and maintain a high sealing performance.

And the fixed ring 2 can adopt hoop or other elements that can be fastened and fixed on the surface of the ground pipe. The outer wall of the fixed ring 2 is provided with a first fixed block 11, and the first fixed block 11 is provided with a bolt 8 to pass through. The outer wall of the shell is provided with a second fixed block 12, and the screw holes are arranged on the second fixed block 12.

When in use, fix the fixing ring 2 on the surface of the ground pipe, put the housing 1 on the ground pipe, the ground pipe passes through the lower through hole 6 and extends into the housing 1, and the top of the ground pipe is pushed against the extruded part 7 , keep a certain adjustment gap between the fixed ring 2 and the housing 1, then insert the power transmission cable from the upper through hole 5, and then penetrate into the ground pipe, after the power transmission cable is passed through, turn the bolt 8 to make the fixed ring 2 and the housing 1 is shortened, the top of the ground pipe squeezes the extruding part 7, and the extruding part 7 reduces the space of the airbag 4, thereby increasing the pressure in the airbag 4, and the first protruding ring 9 extrudes and transmits electricity For cables, the second protruding ring 10 squeezes the ground pipe to form multiple seals to ensure that small animals or rainwater will not enter the ground pipe to complete the seal.

The above is only a specific embodiment of the present invention, but the technical characteristics of the present invention are not limited thereto, any changes or modifications made by those skilled in the art within the field of the present invention are covered by the patent scope of the present invention among.

Claims (5)

1. Power transmission cable introduces ground pipe plugging device, its characterized in that: the novel electric cable fixing device comprises a shell (1) and a fixing ring (2), wherein a power cable inserting hole is formed in the top of the shell (1), a ground pipe inserting hole is formed in the bottom of the shell (1), an elastic sealing piece (3) is further arranged in the shell (1), an air bag (4) is arranged in the sealing piece (3), the sealing piece (3) is annular, the sealing piece (3) comprises an upper through hole (5) and a lower through hole (6) which are communicated, the upper through hole (5) is connected with the power cable inserting hole, the lower through hole (6) is connected with the ground pipe inserting hole, the inner diameter of the lower through hole (6) is larger than that of the upper through hole (5), a step is formed at the joint of the lower through hole (6) and the upper through hole (5), and an extrusion part (7) is arranged at the step;

the fixed ring (2) is fixed on the ground pipe, the fixed ring (2) is provided with a bolt (8), and the shell (1) is provided with a screw hole matched with the bolt (8);

the top of the ground pipe is pressed and extruded to form the extruding part (7) by screwing the bolt (8), so that the volume of the air bag (4) is reduced, and the upper through hole (5) and the power transmission cable and the lower through hole (6) and the ground pipe are tightly contacted to form a seal.

2. The power cable entry ground pipe plugging device of claim 1, wherein: the inner wall of the upper through hole (5) is provided with a plurality of first convex rings (9) coaxial with the upper through hole (5).

3. The power cable entry ground pipe plugging device of claim 1, wherein: the inner wall of the lower through hole (6) is provided with a plurality of second convex rings (10) coaxial with the lower through hole (6).

4. The power cable entry ground pipe plugging device of claim 1, wherein: the extrusion part (7) is made of hard materials, and the cross section of the extrusion part (7) is of a door-shaped structure with a downward opening.

5. The power cable entry ground pipe plugging device of claim 1, wherein: the fixing ring (2) is a hoop, a first fixing block (11) is arranged on the outer side wall of the fixing ring (2), a fixing hole for a bolt (8) to pass through is formed in the first fixing block (11), a second fixing block (12) is arranged on the outer side wall of the shell (1), and the screw hole is formed in the second fixing block (12).

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