JPS647268Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention Industrial application field The present invention relates to a water pipe connected to a submersible pump used for draining spring water at civil engineering construction sites.

2. Description of the Related Art A submersible pump used for draining spring water at a civil engineering work site, for example, incorporates a pump, an electric motor, an electric switch, etc. When using this submersible pump A, as shown in Fig. 3, a water-resistant cable for power transmission (not shown) and water pipes 1 and 2 for sending the sucked water to a predetermined location are connected to the submersible pump A. After that, put this submersible pump A under the water surface. In this state, submersible pump A is operated to pump water.

Problems to be solved by the invention As mentioned above, since water is pumped using submersible pump A, among water pipes 1 and 2 connected to submersible pump A, water pipe 1 used for lifting section B has A bellows-shaped water pipe 1 made of synthetic resin or the like is used. In this way, the submersible pump A uses a bellows-shaped water pipe 1 for the lift section B.
This is to allow the submersible pump A to change its posture relatively freely in the water, and to absorb the vibrations of the submersible pump A.
However, when the bellows-shaped water pipe 1 is used in the lifting area B, the bellows-shaped water pipe 1 becomes twisted due to vibrations during water supply, and sand, etc. sucked into the twisted part along with the water. There was a problem where the water accumulated and the water pipe 1 became clogged. For this reason, conventionally, submersible pump A
During use, if sand, etc. accumulates in the water pipe 1 and the discharge amount from the submersible pump A decreases extremely, the operation of the submersible pump A is temporarily stopped, the water pipe 1 is removed from the submersible pump A, and the water pipe is removed. I have to clean the inside of 1.
There was a problem that work efficiency was extremely reduced.

(b) Means for solving the structural problems of the invention In order to pump water with a submersible pump, in the water pipe connected to the submersible pump, the tip of the water pipe is connected to the submersible pump, and the lifting area is A plurality of straight water pipes connected to each other so that they can be expanded and contracted, and a short bellows-shaped connection interposed between the straight pipes and the submersible pump. a cap nut having a tapered surface on its inner circumferential surface, which is screwed onto the outer periphery of the straight tube to position and fix the straight tubes, and the tapered surface of the cap nut and the outer circumferential surface of the straight tube. and a wedge-shaped member interposed between the pipe and the pipe, and among the plurality of straight pipes, the tip of the straight pipe connected to the water pipe used for the horizontal portion is bent at a substantially right angle. According to
This prevents twisting, etc. from occurring in the water pipes.

Embodiment FIG. 1 is a diagram showing a state in which a water pipe 10 according to the present invention is connected to a submersible pump A, and the water pipe 10 shown in this figure includes a first, second, and third straight pipe 1.
1, 12, 13, and a short connecting pipe 14 interposed between the first straight pipe 11 and the submersible pump A. First and third straight pipes 11, 13
is formed to have a smaller diameter than the second straight pipe 12, and the first and third straight pipes 11 and 13 are slidably inserted into the second straight pipe 12. By sliding the first and third straight pipes 11 and 13 relative to the second straight pipe 12, the total length of the water pipe 10 can be adjusted. Further, the tip of the third straight pipe 13 is bent at a substantially right angle as shown in the figure.
Connection with the water pipe 15 used in the horizontal portion is facilitated. Note that the positioning and fixing of the first and third straight pipes 11 and 13 with respect to the second straight pipe 12 after sliding may be performed as shown in FIG. 2, for example. That is, a threaded portion 12a is provided on the outer circumferential surface of the end of the second straight pipe 12, and a cap nut 16 having a tapered surface 16a on the inner circumferential surface is screwed onto the threaded portion 12a. Or third straight pipe 11,1
A wedge-shaped space 17 is formed between the outer circumferential surface of No. 3 and the outer peripheral surface of No. 3. A wedge-shaped member 18 is interposed in this wedge-shaped space 17, and in this state, the cap nut 16 is screwed and the wedge-shaped member 18 is pressed into contact with the first or third straight pipes 11, 13. 3 straight pipes 11, 13
The second straight pipe 12 is positioned and fixed.
In addition, 19 in the figure is the first or third straight pipe 11, 13.
This is an O-ring interposed between the straight pipe 12 and the second straight pipe 12. Further, the above-mentioned short connecting pipe 14 that connects the first straight pipe 11 and the submersible pump A is formed into a bellows shape using synthetic resin or the like. to third straight pipe 11,1
At the same time, the vibration of the submersible pump A is absorbed. Further, the connecting portion between this connecting pipe 14 and the submersible pump A is rotatable.

In the above configuration, in order to connect the water pipe 10 according to the present invention to the submersible pump A to pump water, connect the connecting pipe 14 of the water pipe 10 to the submersible pump A, and connect the third straight pipe 13 to the submersible pump A. , Water pipe 15 used in the horizontal section
Connect. Next, the first and third straight pipes 11, 13
is pulled out from the second straight pipe 12, and after adjusting the total length of the water pipe 10 to a desired length, the submersible pump A is put under the water surface. After that, activate submersible pump A,
Pump water.

Although the above embodiment describes an example in which three straight pipes are used for the water pipe, the number of straight pipes is not limited to three, and can be increased or decreased according to the expected usage condition. You can. In addition, when the necessary head cannot be obtained even if the water pipes consisting of three straight pipes are extended to the maximum, the water pipes may be connected to each other. In addition, as mentioned above, the method of connecting straight pipes is to store the straight pipes at both ends in the straight pipe in the center, or to gradually increase or decrease the diameter of the straight pipes, and to Small diameter straight pipes may be stored one after another.

C. Effect of the invention As mentioned above, in order to pump water using a submersible pump, in the water pipe connected to the submersible pump, a plurality of water pipes used for the lifting part of the water pipe are connected in a flexible manner. Since it is formed from a straight pipe, the water pipe does not get twisted during use, and it is possible to prevent sand etc. from accumulating in the water pipe. In addition, a short bellows-shaped connecting pipe is interposed between the straight pipe and the submersible pump, so this connecting pipe makes it easy to change the attitude of the submersible pump with respect to the straight pipe, and at the same time reduces the vibration of the submersible pump. can be absorbed. or,
Since this water pipe is designed to be expandable and retractable, the total length of the water pipe can be varied in response to the lift height that changes depending on the conditions at the construction site, and at the same time, the total length can be shortened and stored compactly when not in use.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing how the water pipe according to the present invention is used, Fig. 2 is a cross-sectional view showing an example of a method for positioning and fixing the joint between straight pipes, and Fig. 3 is how a conventional water pipe is used. FIG. A... Submersible pump, 10... Water pipe, 11...
1st straight pipe, 12...2nd straight pipe, 13...3rd straight pipe
straight pipe, 14... connecting pipe.

Claims (1)

[Scope of utility model registration request] Since water is pumped by a submersible pump, the tip of the water pipe connected to the submersible pump is connected to the submersible pump, and the water pipe used for the lifting area is made to be expandable and retractable. It is composed of a plurality of straight pipes that are connected to each other so as to be able to go in and out, and a short, bellows-shaped connecting pipe that is interposed between the straight pipes and the submersible pump, and the straight pipes are connected to each other. is positioned and fixed by a cap nut having a tapered surface on its inner circumferential surface, which is screwed onto the outer circumference of the straight pipe, and a wedge-shaped member interposed between the tapered surface of the cap nut and the outer circumferential surface of the straight pipe. A water supply pipe for a submersible pump, characterized in that, among the plurality of straight pipes, the tip of the straight pipe connected to the water supply pipe used in the horizontal portion is bent at a substantially right angle.