JPS623581Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic pipe compression device used in a piping line made of polyethylene resin pipes, etc., to partially crush the resin pipe and temporarily block the flow path within the pipe.

When taking out a branch pipe from an existing piping line such as a polyethylene resin pipe, or when installing a flow meter etc. in the middle of a piping line, when partially crushing the resin pipe and temporarily blocking the flow path inside the pipe. A hydraulic tube compression device is used.

In general, this hydraulic pipe compression device has struts erected at both ends of a lower support, a slide rod is inserted through the struts, and the upper end of each strut is fixed to the upper support, and the upper support and slide rod are connected to each other. This conventional device operates the hydraulic cylinder to push down the slide rod and crush the resin pipe between the slide rod and the lower support to a predetermined position. During the holding period, the sliding rod moved upward due to the restoring force of the resin tube as the pressing force of the hydraulic cylinder decreased, and the fluid in the tube sometimes leaked.

The hydraulic pipe compression device of the present invention eliminates these conventional drawbacks, and includes a stopper device between the upper support and the slide rod, so that the slide rod crushes the resin pipe by the operation of the hydraulic cylinder. The present invention provides a hydraulic pipe compression device in which the stopper device acts on the upper surface of the slide rod to prevent the slide rod from moving upward due to a decrease in the pressing force of the hydraulic cylinder.

Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is a lower support, 2 is a column erected at both ends of the lower support 1, 3 is an upper support, 4 is a slide rod inserted through the columns 2, 2, and 5 is a hydraulic cylinder, which slides. The rod 4 is configured to be guided by the supports 2, 2 and movable in the vertical direction by the operation of a hydraulic cylinder 5. Reference numeral 6 denotes a stopper device fitted externally to the support column 2.

The stopper device 6 consists of an inner cylinder 62 fixed to the column 2 and an outer cylinder 61. A male thread 621 is provided at the lower part of the inner cylinder 62, and a male thread 621 is screwed into the upper part of the outer cylinder 61. A female thread 611 is provided.

Therefore, when the slide rod 4 is lowered to a predetermined position by the operation of the hydraulic cylinder 5, the outer cylinder 61
When the female screw 611 is screwed into the male screw 621 and lowered, the lower end surface of the outer cylinder 61 comes into contact with the upper surface of the slide rod 4, and the slide rod 4 can be prevented from moving upward. In addition, 7 is a bolt that restricts the descent of the slide rod 4.

Next, a process of partially crushing a polyethylene resin pipe using this pipe compression device to temporarily block the channel inside the pipe will be explained.

First, as shown in the drawing, move the slide rod 4 upwards, insert the polyethylene resin pipe P between the slide rod 4 and the lower support 1, and bolt the resin pipe P in consideration of the wall thickness of the resin pipe P. Determine the lowering position L of No.7. Next, the hydraulic cylinder 5 is operated to push down the slide rod 4, and the polyethylene resin pipe P is crushed between the slide rod 4 and the lower support 1, and is deformed into a flat shape, thereby closing the channel in the pipe. Therefore,
The outer cylinder 61 is screwed into the inner cylinder 62, and the lower end surface of the outer cylinder 61 is brought into contact with the upper surface of the slide rod 4.

Due to the action of this stopper device 6, even when the pressing force of the hydraulic cylinder 5 decreases, the slide rod 4
Since the upward movement of the pipe is prevented and leakage of the fluid inside the pipe can be reliably prevented, branch pipes can be removed and flowmeters etc. can be installed with peace of mind.

It should be noted that the above-mentioned device represents one embodiment of the present invention, and can take various forms without departing from the gist of the present invention. For example, instead of the structure in which the outer cylinder 61 and the inner cylinder 62 are fitted onto the support column 2 in the above embodiment, the upper end of the inner cylinder 62 is connected to the upper support member 2.
It can also be fixed at a predetermined position on the bottom surface of the .

As detailed above, the hydraulic pipe compression device of the present invention is provided with a stopper device between the upper support and the slide rod, so that the hydraulic cylinder is activated and the slide rod crushes the polyethylene resin pipe, etc. At this time, simply by acting the stopper device on the upper surface of the slide rod, it is possible to reliably prevent the slide rod from moving upward due to a decrease in the pressing force of the hydraulic cylinder.

Generally, polyethylene resin pipes are used as pipes for transporting city gas, but the hydraulic pipe compression device of this invention can reliably block the flow path inside the pipes, so there is no risk of fire when melting and joining using a heater. There is no risk of this occurring, and branch pipes can be taken out and flowmeters installed with confidence, making it extremely useful in practice.

[Brief explanation of the drawing]

The drawing is a partially cutaway front view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Lower support, 2...Strut, 3...Upper support, 4...Slide rod, 5...Hydraulic cylinder, 6...Stopper device, 61...Outer cylinder, 62
...Inner tube.

Claims (1)

[Scope of utility model registration request] Supports 2, 2 are erected at both ends of the lower support 1,
A slide rod 4 is inserted into the columns 2, 2, and the upper end of each column 2, 2 is fixed to the upper support 3, and a hydraulic cylinder 5 is disposed between the upper support 3 and the slide rod 4 to allow the slide. In the hydraulic pipe compression device in which the rod 4 is movable in the vertical direction, a female screw 61 is provided at the upper part between the upper support body 3 and the slide rod 4.
1, and an inner cylinder 62 having a male screw 621 that is inserted into the outer cylinder 61 and screwed into the female screw 61.
A stopper device 6 is provided, which is fixed externally to the upper support member 3 or whose upper end is fixed to the lower surface of the upper support member 3.
When the slide rod 4 descends by a predetermined amount, the female screw 6
11 and a male screw 621 are screwed together to bring the lower end surface of the outer cylinder 61 into contact with the upper surface of the slide rod 4.