JPH0614297U - Extension hose for water absorption - Google Patents

Abstract

(57) [Summary] [Structure] A large-diameter hose 1 and a small-diameter hose 2 which is inserted into the large-diameter hose 1 with a gap therebetween are provided, and one end of the large-diameter hose 1 can be removably adhered to the outer periphery of the large-diameter hose 1. A narrow rubber joint pipe 3 having a large diameter portion 3a and a small diameter portion 3b, the other end of which can be detachably attached to the outer circumference of the small diameter hose 2, is provided on the outer circumference of the small diameter hose 2 and the end portion of the large diameter hose 1. Get in. [Effect] The large diameter hose 1 and the small diameter hose 2 can be continuously connected through the rubber joint pipe 3, and the small diameter hose 2 is inserted into the large diameter hose 1 through the rubber joint pipe 3. By doing so, the overall length of the hose can be extended and shortened. The joint pipe 3 used for the connection has a simple structure made of rubber and has a simple structure. By utilizing the flexibility of the rubber, the joint pipe 3 is drawn in by a negative pressure in the hose at the time of absorbing water to make the joint pipe 3.
The large diameter hose 1 and the small diameter hose 2 can be positioned and fixed in a close contact state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an extension hose for absorbing water, which is an improved hose laid near the face of a spring suction device used for sucking spring water generated when excavating an underground tunnel or the like to the ground.

[0002]

[Prior art]

 In excavation work such as underground tunnels, the scrap (excavated soil) generated by the excavation work is transported to the ground on a truck, but if the spring water from the face is left undisturbed, the spring water near the face will be removed. Since it accumulates at a low position, a suction port of a hose was placed near the face and the hose was sucked up by a vacuum pump on the ground. However, in a hose connected to such a suction pump, as the excavation progresses, the position of the face also advances, so it is necessary to move the suction port at the end of the hose accordingly.

For this reason, conventionally, a hose having an extra length has been bent in a ring shape and stretched as the face advances. However, since the inside of the excavation pit is small, making the hose in a ring shape with the hose laying sideways hinders the installation of other equipment, the laying path of the truck, and the passage of workers, and the hose ring is set up vertically. I was supposed to place them. However, when the suctioned spring water is passed through such a vertical hose, the suction pressure is required to lift the spring water from the lower part to the upper part of the hose, and the suction pressure of the vacuum pump is reduced by this amount. There is a problem of doing.

As another method, there is also a method in which an expansion tube having a metal double tube structure is connected in the middle of the hose and stretched as necessary, but such an expansion tube has a large diameter and is heavy. However, it became difficult to transport and move it into the excavation mine.

[0005]

[Problems to be Solved by the Invention] Taking the above circumstances into consideration, the vacuum hose to be laid in the digging pit should not have a bent part in the middle, be extendable if necessary, and be easily connected. Therefore, it is necessary to satisfy the conditions that the overall length can be increased, and to have a small diameter and light weight.

An object of the present invention is to provide an extension hose for absorbing water which satisfies such a condition.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, an extension hose for absorbing water of the present invention is provided with a large diameter hose 1 and a small diameter hose 2 which is inserted into the large diameter hose 1 with a gap therebetween, and one end of which is the large diameter hose. 1 is a narrow-diameter hose having a large-diameter portion 3a that can be detachably attached to the outer periphery of 1 and a small-diameter portion 3b whose other end is detachably attached to the outer periphery of the small-diameter hose 2. 2 is inserted into the outer periphery of the large diameter hose 1 and the small diameter hose 2 is fixed to the outer periphery of the end of the small diameter hose 2 by inserting the small diameter hose 2 into the joint pipe 3. The large-diameter hose 1 and the small-diameter hose 2 are extended by a predetermined length, and both the large-diameter hose 1 and the small-diameter hose 2 are made of a material that can withstand the negative pressure of the vacuum pump. After extending a predetermined length, the outer periphery of the small-diameter portion 3b of the joint pipe 3 is fastened to the fastening vane. It may be tied at 5.

[0008]

[Action]

 In the above extension hose, the small-diameter hose 2 is fitted in the small-diameter portion 3b of the joint pipe 3, and the locking projection 4 is fixed to the outer periphery of the end portion of the small-diameter hose 2 so that the large-diameter portion of the joint pipe 3 is fixed. The large diameter hose 1 and the small diameter hose 2 can be connected by fitting the large diameter hose 1 into 3a.

If the joint pipes 3 are fitted to both ends of the small-diameter hose 2, the small-diameter hose 2 and the large-diameter hose 1 are alternately arranged to be connected to each other. The total length can be extended indefinitely.

In this connection, the locking projections 4 fixed to the outer circumference of the end of the small-diameter hose 2 have the locking projections 4 constricted in the joint pipe 3 when the connected hose is stretched as described above. The limit of stretching can be regulated by hitting the inner wall of 3c.

The large-diameter hose 1 remains detachably attached to the joint pipe 3, but when a vacuum pump is connected to the other end of the large-diameter hose 1, the inside of the hose becomes negative pressure, and this negative pressure action is generated. Since P tries to pull in the constricted portion 3c of the rubber joint pipe 3 inward (in the direction of the arrow indicated by the two-dot chain line) across the gap between the large-diameter hose 1 and the small-diameter hose 2, the joint with the large-diameter hose 1 The pipe 3 is fixed.

At the same time, the negative pressure P causes the joint pipe 3 to be tightly adsorbed to the small-diameter hose 2 so as to be fixed, but the joint pipe 3 is tied to the small-diameter hose 2 with the fastening band 5. Then, the small-diameter hose 2 can be positioned more firmly, and the extension of the small-diameter hose 2 does not fluctuate in response to the operation of pulling the small-diameter hose 2 inward.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1A is a vertical cross-sectional view of the extension hose of the present invention, and FIG. 1B is an outline view of the extension hose of FIG. 1A. FIG. 2 is a view showing a connected state of the extension hose of the present invention. 1 and 2, both the large diameter hose 1 and the small diameter hose 2 are made of a material that can withstand the negative pressure of the vacuum pump, and the small diameter hose 2 is inserted into the large diameter hose 1 with a gap therebetween. To be formed.

As a joint between the large diameter hose 1 and the small diameter hose 2, one end is detachably attached to the outer circumference of the large diameter hose 1 and the other end is detachably attached to the outer circumference of the small diameter hose 2. The narrowed rubber joint pipe 3 having the small diameter portion 3b which can be closely contacted is formed.

Then, the large-diameter hose 1, the small-diameter hose 2, and the joint pipe 3 are brought apart and connected to each other in the excavation mine.

As a connecting method, the small-diameter portions 3b of the joint pipe 3 are fitted to both ends of the small-diameter hose 2, and at this time, the large-diameter portions 3a of the joint pipe 3 are directed outwards as shown in FIG. To It is possible to prevent the small-diameter hose 2 from coming off the joint pipe 3 by fixing the locking projections 4 by fixing thick bands to the outer circumferences of both ends of the small-diameter hose 2.

Then, the large-diameter hose 1 is fitted into the large-diameter portion 3a of the joint pipe 3 until it hits the inner wall of the narrowed portion 3c. The fastening band 5 is tied and fixed to the outer circumference of the small diameter portion 3b of the joint pipe 3 at a position where the small diameter hose 2 is extended by a required length. The fastening band 5 is configured to be detachable.

The fastening band 5 is not always necessary, and the joint pipe 3 is adhering to the small-diameter hose 2 in a tightly adhering state by the negative pressure P in the hose during operation of the vacuum pump to bring it into a fixed state. However, when oily substances are present on the contact surface between the joint pipe 3 and the small-diameter hose 2 and it is likely to slip, the fastening band 5 may be used to firmly position the small-diameter hose 2.

When the distance between the vacuum pump and the face of the hose is short, it is sufficient to connect the small diameter hose 2 to the end of the large diameter hose 1 connected to the vacuum pump as described above. The large-diameter hose 1 and the small-diameter hose 2 are sequentially connected as the distance between the vacuum pump and the face increases as the face advances.

[0021]

[Effect of device]

 As described above, the water-absorption extension hose of the present invention can continuously connect a large-diameter hose and a small-diameter hose via a rubber joint pipe, and also can make a small-diameter hose via a rubber joint pipe. By inserting the into the large diameter hose, the overall length of the hose can be extended and shortened.

Further, the joint pipe used for the connection has a simple structure made of rubber and has a simple structure, and the flexibility of the rubber is utilized to draw in the negative pressure in the hose at the time of water absorption to draw in the rubber. It is possible to position and fix the joint pipe and the large diameter hose and the small diameter hose in close contact with each other.

Therefore, such an extension hose is suitable for being drawn into a narrow place such as an excavation hole on the assumption that the extension is a prerequisite, and the extension of the connecting portion and the sequential connection of the large diameter hose and the small diameter hose enable the face of the face to be cut. The entire length of the hose can be extended without waste according to the forward movement.

[Brief description of drawings]

FIG. 1 (a) is a longitudinal sectional view of an extension hose of the present invention, and FIG. 1 (b) is an outline view of the extension hose of FIG. 1 (a).

FIG. 2 is a view showing a connected state of the extension hose of the present invention.

[Explanation of sign]

1 ... Large diameter hose, 2 ... Small diameter hose, 3 ... Joint pipe, 3a ...
Large diameter part, 3b ... Small diameter part, 3c ... Constricted part, 4 ... Locking protrusion,
5 ... Fastening band.

Claims (2)

[Scope of utility model registration request] 1. A large-diameter portion having a large-diameter hose 1 and a small-diameter hose 2 which is inserted into the large-diameter hose 1 with a gap therebetween and one end of which can be detachably attached to the outer circumference of the large-diameter hose 1. A narrow rubber joint pipe 3 having a small diameter portion 3b which can be removably adhered to the outer circumference of the small diameter hose 2 at the other end is provided on the outer circumference of the small diameter hose 2 and the end portion of the large diameter hose 1. The small-diameter hose 2 is inserted into the joint pipe 3 and extended for a predetermined length in a state where the locking projection 4 is fixedly provided on the outer periphery of the end portion of the small-diameter hose 2, and the large-diameter hose 1 and the large-diameter hose 1 are connected to each other. Small diameter hose 2
Is an extension hose for absorbing water, which is made of a material that can withstand the negative pressure of the vacuum pump. 2. The small diameter hose 2 is inserted into the joint pipe 3 and extended by a predetermined length, and the outer periphery of the small diameter portion 3b of the joint pipe 3 is bound by a fastening band 5. Item 1. An extension hose for absorbing water according to item 1.