JPH0610695U - Sealing device for cable conduits - Google Patents

Abstract

(57) [Summary] [Purpose] To enhance the sealing effect of the conduit opening of the cable conduit. [Structure] A pair of front pressing plates 1 and a pair of rear pressing plates 3 each of which is formed of a metal material and is formed into an annular shape.
A front seal plate 6 of a plate-like elastic body superposed on the front presser plate 1 on the rear side, a rear seal plate 8 of a plate elastic body superposed on the front presser plate 3 on the front side, both seal plates 6, The intermediate sealing member 9 of a cylindrical elastic body sandwiched between 8 and the intermediate sealing member 9 is inserted into the intermediate sealing member 9 and the sealing material is packed in the intermediate sealing member 9. The pressing plates 1 and 3 are tightened by the plurality of tightening bolts 5 and the nuts 11 screwed into the bolts 5 to roll the seal material, and the intermediate seal member 9 is compressed and deformed so that the conduit opening K is formed.
It is pressed against the wall surface K1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is applied when a communication cable, a power transmission cable, etc. are inserted and are fitted from the manhole side into the conduit opening of the cable conduit connected to the manhole to seal the gap in the conduit opening. A sealing device for a cable conduit.

[0002]

[Prior art]

 Conventionally, when sealing the inside of the conduit opening of a cable conduit when adding a cable, a pair of front and rear metal plates through which the cable is inserted and the inside of both metal plates are attached respectively. A sealing device having a pair of front and rear rubber plates is fitted into the pipe mouth, and the metal plates are clamped by bolts and nuts with the clay-like sealing material being packed between the rubber plates. Each of the gaps in the pipeline mouth was sealed by the compressed and rolled sealing material.

[0003]

[Problems to be solved by the device]

 In the above-mentioned sealing device, there is a problem that the sealing effect against the gap between the rubber plates and the sealing material and the wall surface of the conduit opening is insufficient, and water leakage easily occurs. The present invention aims to solve the above problems.

[0004]

[Means for Solving the Problems]

 The present invention is a sealing device which is fitted into a conduit opening of a cable conduit to seal a gap in the conduit opening, and has a plurality of bolt holes penetratingly formed into an annular shape which can be divided by a metal material. The formed front pressing plate and a plurality of bolts that are inserted through the bolt holes are combined to form a ring-shaped rear pressing plate that can be divided by a metal material, and the front pressing plate is superposed on the rear side of the front pressing plate. A front seal plate of a plate-like elastic body through which the cable and the bolts are inserted, and a rear seal plate of a plate-like elastic body that is superposed on the front side of the rear seal plate and through which the cable and the bolts are inserted, When the seal material is packed inside and the cable is inserted, it is sandwiched between the both seal plates, and when the both press plates are tightened by the bolts and the nuts screwed into the bolts, respectively. It has a configuration in which an intermediate seal member and concentrically arranged cylindrical elastic body for pressing by condensation deformed wall of the conduit opening.

[0005]

[Action]

 The front and rear pressing plates, which are each formed into an annular shape that can be divided by a metal material, the front and rear sealing plates of the plate-like elastic body, which are respectively superposed on the front and rear pressing plates, and the space between the front and rear sealing plates. The intermediate seal part material of the cylindrical elastic body sandwiched between the intermediate seal material and the intermediate seal material is packed into the inside of the intermediate seal material and fitted into the conduit opening, and then the rear presser plate is attached. A plurality of bolts which are combined and inserted into the front and rear seal plates and the front pressing plate through the intermediate seal member, and nuts screwed into the respective bolts are used to press the both pressing plates. While tightening and rolling the sealing material, the intermediate sealing member is compressed and deformed so as to be pressed against the wall surface of the conduit opening.

[0006]

[Effect of device]

 Since the present invention is configured as described above, when the sealing device is fitted into the conduit opening and the front and rear presser plates are tightened with bolts and nuts, the gap between the conduit opening and each cable can be accurately sealed. it can. Especially, when the front and rear presser plates are tightened, the intermediate seal member is compressed and deformed, and the outer diameter of the intermediate seal member expands and comes into pressure contact with the wall surface of the conduit opening over its entire circumference. The gap can be accurately sealed to enhance the sealing effect.

[0007]

【Example】

 Next, one embodiment of the present invention will be described with reference to the drawings. A proper number of cables C, such as power transmission cables and communication cables, are laid inside, and are inserted from the manhole side into the conduit opening K of the horizontal hole-shaped cable conduit that communicates with the manhole. In the sealing device S that seals the gap between the wall surface K1 of each of the cables and each cable C, a pair of front and rear presser plates 1 and 1 installed at the front end of the seal device S are formed in a ring shape that can be divided by metal plates. The outer diameter of the front pressing plate 1 is slightly smaller than the diameter of the conduit opening K.

Both front pressing plates 1 are respectively formed by a pair of semi-annular plate pieces 1a, 1a that are arranged in a butt shape, and both front pressing plates 1 have 90 ° rotational symmetrical positions. Each of the four bolt holes 2 arranged is penetratingly provided. The abutting portions of the two plate pieces 1a of the front presser plate 1 on the front side are arranged at positions displaced by 90 ° from the positions of the abutting portions of the two plate pieces 1a of the front presser plate 1 on the rear side.

A pair of front and rear presser plates 3, 3 which are concentrically installed behind the front presser plates 1 and are spaced apart from each other are circles that can be divided by metal plates in the same shape as the shape of the front presser plate 1. It is formed in a ring shape.

The two rear pressing plates 3 are respectively formed by a pair of plate pieces 3a, 3a that are arranged in a butt shape, and two bolt holes 4 are formed in each of the front plate pieces 3a. , The rear end presser plate on the rear side is arranged at a rotationally symmetrical position of 90 °, extends forward in parallel, and has the base end portions 5 of the four tightening bolts 5 inserted into the bolt holes 4, respectively. It is fixed.

A plate-shaped elastic body having an outer diameter slightly larger than the outer diameter of the front pressing plate 1 is formed on the rear side surface of the front pressing plate 1 on the rear side so as to be elastically bendable and deformable by an elastic material such as rubber. The front seal plates 6 are concentrically overlapped with each other.

In order to insert each cable C into the front seal plate 6, an insertion port 6a is cut out in accordance with the outer diameter of each cable C at the time of sealing work, and the cable C is inserted into the front seal plate 6. The cut-off portion 6b is cut open when it is inserted into the mouth 6a.

Four bolt holes 6 c, through which the tightening bolts 5 are provided, are provided near the peripheral portion of the front seal plate 6.

On the front side surface of the front rear pressing plate 3, a rear sealing plate 8 of a plate-like elastic body formed in the same manner as the front sealing plate 6 is concentrically overlapped.

The rear seal plate 8 is provided with an insertion port 8a that is cut out in accordance with the outer diameter of each cable C at the time of sealing the conduit port K in order to insert each cable C, and the rear seal is also provided. The plate 8 is cut with a cut-off portion 8b that is widened when each cable C is inserted into the insertion port 8a.

Four bolt holes 8c, through which the tightening bolts 5 are respectively inserted, are formed near the peripheral portion of the rear seal plate 8.

Between the front seal plate 6 and the rear seal plate 8, an elastic material such as rubber has an outer diameter substantially equal to the outer diameter of both seal plates 6, 8 and is formed to be elastically compressible and deformable. An intermediate seal member 9 of a cylindrical elastic body, into which the tightening bolt 5 is inserted, is concentrically sandwiched. The intermediate seal member 9 is formed therein with a separation portion 9a that is widened when the cable C is inserted.

At the central portion of the intermediate seal member 9, an elastic packing 10 sandwiched between the cables C and circumscribing a part of each cable C 1 is installed. A clay-like sealing material to be filled around the cable C is packed.

After cutting the insertion openings 6a and 8a into the front and rear seal plates 6 and 8 in accordance with the outer diameter of each cable C, both rear pressing plates 3, the rear sealing plate 8, the intermediate sealing member 9, and the front sealing plate 9 are formed. The seal plate 6 and both front pressing plates 1 are arranged in order from the rear after inserting each cable C near the center of each, and each tightening bolt 5 is attached to the bolt hole 3b of the front rear pressing plate 3 and the front and rear seals. The bolts 6a and 8a of the plates 6 and 8 and the bolt holes 1b of both front pressing plates 1 are inserted, and the nuts 11 are screwed into the tightening bolts 5, respectively, and the packing 10 is sandwiched between the cables C to form an intermediate portion. When the nuts 11 are screwed and the front and back pressing plates 1 and 3 are tightened while the sealing material is packed between the sealing plates 6 and 8 inside the sealing member 9, the sealing material is Is clamped by each presser plate 1 and 3 and rolled, and each cable C and The gaps between the inter-sealing member 9 and the sponge packing 10 are invaded and the gaps are sealed, and the intermediate sealing member 9 is pinched by the front and rear pressing plates 1 and 3 to be compressed and deformed, and the outer diameter thereof is expanded. Then, the intermediate seal member 9 is pressed against the wall surface K1 of the conduit opening K, and the gap between the outer peripheral surface of the intermediate seal member 9 and the wall surface K1 of the conduit opening K is sealed by the intermediate seal member 9.

Next, the operation and effect of the embodiment having the above-mentioned configuration will be described. In this example, in the sealing device S which is fitted in the conduit opening K of the cable conduit and seals the gap in the conduit opening K, a plurality of bolt holes 2 are penetratingly provided and can be divided by a metal material. A pair of front and rear presser foot plates formed in the shape of a ring that is separable by a metal material by connecting a pair of front and back presser plates 1 formed in the front and a plurality of tightening bolts 5 that are inserted into the bolt holes 2. The plate 3, the front sealing plate 6 of a plate-like elastic body which is superposed on the front pressing plate 1 on the rear side thereof and into which the cables C and the fastening bolts 5 are inserted, and the front pressing plate 3 are superposed on the rear pressing plate 3 on the front side thereof. Between the seal plates 6 and 8 with the cable C inserted through the rear seal plate 8 of a plate-like elastic body into which the cables C and the tightening bolts 5 are inserted. It is sandwiched and each tightening bolt 5 and each bolt 5 When the pressing plates 1 and 3 are tightened by the nuts 11 which are screwed into each other, they are compressed and deformed concentrically with the intermediate seal member 9 of a cylindrical elastic body that is pressed against the wall surface K1 of the conduit port K. They are arranged.

Therefore, each cable C is inserted into the sealing device S, the sealing material is packed therein, the sealing device S is fitted into the conduit opening K, and the front and rear pressing plates 1 and 3 are fixed by the tightening bolts 5 and the nuts 11. When tightened, the gap between the conduit opening K and each cable C can be accurately sealed.

In particular, since the intermediate seal member 9 is compressed and deformed by tightening the front and rear pressing plates 1 and 3, the outer diameter of the intermediate seal member 9 is expanded and pressed against the wall surface K1 of the conduit opening K over the entire circumference thereof. The gap between the intermediate seal member 9 and the wall surface of the conduit opening K can be accurately sealed to enhance the sealing effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a sealing device according to an embodiment of the present invention.

FIG. 2 is likewise a front view.

FIG. 3 is likewise an exploded perspective view.

[Explanation of symbols]

 1 Front pressing plate 2 Bolt hole 3 Rear pressing plate 5 Tightening bolt 6 Front sealing plate 8 Rear sealing plate 9 Intermediate sealing member 11 Nut S Sealing device

Claims (1)

[Scope of utility model registration request] 1. A seal device which is fitted into a conduit opening of a cable conduit to seal a gap in the conduit opening, and has a plurality of bolt holes penetratingly formed into an annular shape which can be divided by a metal material. The formed front pressing plate, the rear pressing plate formed into an annular shape that is separable by a metal material by coupling a plurality of bolts inserted into the bolt holes, and the front pressing plate is superposed on the rear side of the front pressing plate. A front seal plate of a plate-like elastic body through which the cable and the bolts are inserted, and a rear seal plate of a plate-like elastic body in which the cable and the bolts are inserted into the rear seal plate on the front side thereof, A seal material is packed inside and is sandwiched between the seal plates in a state where the cable is inserted, and compressed when the press plates are tightened by the bolts and nuts screwed into the bolts. A sealing device for a conduit for a cable, characterized by arranging concentrically with an intermediate sealing member of a cylindrical elastic body that is deformed and comes into pressure contact with the wall surface of the conduit opening.