JPH0623832Y2 - Airtight member for stopping water such as sewer pipes - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention removes and cleans sediment, sludge, and foreign substances accumulated inside various sewer pipes buried in the ground, and repairs damaged parts of each sewer pipe. The present invention relates to a watertight airtight member for a sewer pipe or the like for temporarily shutting off a part of a fluid such as water flowing in a sewer pipe while temporarily shutting it off to remove and repair foreign matter inside.

(Prior Art) Conventionally, this kind of watertight airtight member is usually one in which a plurality of slip-stop pieces for pressure welding are formed on a part of the outer peripheral surface of the hollow body so as to adhere airtightly. Is the current state of use.

(Problems to be solved by the invention) In the conventional technology described above, since the elastic contact surface of the airtight member with the inner peripheral surface of the tubular body is a wide contact surface,
Watertightness cannot be obtained between the tube body and the airtight member, and there is a problem that the pipe moves without being able to withstand pressure due to water pressure and earth pressure, and mud and earth and sand flow out.

The present invention has been made in view of the above problems of the prior art, and the purpose thereof is to move the airtight member by the airtight member that is in pressure contact with the inner peripheral surface of the tubular body. It is an object of the present invention to provide an airtight member for water stoppage, which can surely prevent the occurrence of water and can surely exert a water stoppage effect on watertightness.

(Means for Solving the Problem) In order to achieve the above object, the watertight airtight member (1) of the present invention is a circular suction plate (8) in which a large number of central portions are recessed in a cylindrical outer periphery. (8) Forming ... This suction board (8) (8)
Form several crimp rings (9) at the prescribed intervals. Further, along the inner cylindrical surface of the airtight member (1), the reinforcing projecting circle (10)
By achieving the above, the above-mentioned object is achieved.

(Operation) The present invention is configured as described above, and the usage will be described now. The airtight member (1) inserted in the repair pipe (7).
Is injected from the air supply pipe (5) by an air supply device from the outside and expanded to press the outer periphery of the airtight member (1) to the inner peripheral surface of the pipe (7) and flow in the pipe (7). Shut off. At this time, the inner surface of the airtight member (1) is securely adsorbed and immovable, and the crimp rings (9) and (9) provided at predetermined intervals are to reliably shut off running water and maintain watertightness. . The drainage pipe (2) allows continuous drainage without stopping the water.

(Embodiment) Next, referring to the drawings of an embodiment of the present invention, the airtight member (1) which is in pressure contact with the inner walls of various pipes (7) laid in the ground is a synthetic resin which expands and contracts by the pressure action of air. Alternatively, it is composed of an elastic body made of a material such as a synthetic protective film. The airtight member
(1) is a circular fastening plate (3) (3) (3) (3) which has a hollow inside and is entirely formed into a cylindrical shape in FIG. 4, and the bearing portion and the airtight member (1) are crimped on both sides at the center thereof. ) And are integrally formed. (2) shows a discharge pipe that has an outflow function even during the work of removing soil. An air supply pipe (5) from an air supply device is connected to one of the fastening plates (3) and (3) so as to freely hold a connecting material.

Next, the airtight member (1) is formed with a circular suction plate (8) (8), ... The suction cups (8) (8) have a structure in which a plurality of crimp rings (9) (9), which are one or a plurality of strips, are formed on the outer periphery at predetermined intervals. This Crimp Ring (9) (9)
Has a substantially trapezoidal cross section.

Further, on the inner peripheral surface of the airtight member (1), a reinforcing projecting circle for preventing only the center from bulging in a protruding shape at the substantially central portion thereof.
(10) is integrally formed. Reference numeral (6) is the fastening plate (3)
(3) shows a tightening nut to be tightened from the outside, (7) shows a repair pipe for cleaning, and (11) is a through hole formed in the center of the airtight member (1). Reference numeral (12) is a piece of cloth which is adhered to the inner surface of the airtight member (1) as necessary.

(Effects of the Invention) As described above, according to the airtight member of the present invention, in order to reliably maintain the airtightness, it is possible to reliably separate the various willing officers and securely remove foreign matters and the like between them, and
There is an effect that cleaning work or repair work can be performed without stopping the flow.

Further, since the airtight member is formed of an elastic body and has a cylindrical shape having elasticity, it has an effect that it can be sufficiently pressed against the inner walls of various repair pipes to reliably prevent water leakage. Further, since the suction plate having a large number of concave portions provided on the cylindrical outer peripheral surface of the airtight member is formed, the outer periphery of the airtight member is pressed against the inner surface of the repair pipe and is completely pressed and adsorbed. The effect of reliably preventing the movement of the airtight member is provided. Furthermore, since a plurality of crimp rings are formed at predetermined intervals on the suction plate,
It has a synergistic effect of reliably blocking running water and obtaining high watertightness on the inner surface of the repair pipe, and enhancing the crimpability to the inner peripheral surface. Further, by forming the reinforcing protrusion circle on the cylindrical inner surface of the airtight member, only the center of the airtight member swells first when air is injected into the airtight member, which does not average the pressure contact effect. As a result, there is an excellent effect that the outer circumference is pressed against the inner surface of the pipe on average.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical side view of the present invention used in a water shut-off device, FIG. 2 is a partially enlarged vertical side view of the same, and FIG. 3 is a partially enlarged sectional view of the same. FIG. 4 is a partially cutaway view of the airtight member of the present invention. Reference numeral (1) is an airtight member, (7) is repair piping, (8) is a suction plate,
(9) is a crimp ring, and (10) is a reinforcing projecting circle.

Claims (1)

[Scope of utility model registration request] 1. An airtight member for stopping water, such as a sewer pipe, which is disposed and closed inside a pipe (7) to be repaired.
(1) is composed of an elastic body such as synthetic resin or synthetic protective film that expands and contracts by the pressure of air, and the inside is formed into a hollow cylindrical shape, and the airtight member (1) is Install the circular fastening plates (3) (3) that are crimped from both sides,
(3) One side of (3) is connected to an air supply pipe (5), and the airtight member (1) further has a circular suction plate with a large number of recesses in the cylindrical outer peripheral surface. (8) (8) ... is formed, and one or several crimping rings (9) are formed on the outer periphery of the suction cups (8) (8). An airtight member for stopping water such as a sewer pipe, characterized in that a reinforcing projecting circle (10) is formed along a cylindrical inner peripheral surface of the airtight member (1).