JPS5822286B2 - Well strainer groove cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a groove cutting device used to form a large number of water collection slits in the peripheral wall of a pipe in the manufacture of strainers for wells.

The above-mentioned device exists, for example, in Japanese Patent Publication No. 49-21345 and in Utility Application No. 51-117334 by the applicant. Because the work is carried out using the pipes, not only many cutting sounds are generated at the same time, but this sound also reverberates and resonates inside the pipe, acting as if it were a resonator, creating intense noise, which is something that needs to be improved. Admitted.

In view of the above, this invention was made to provide something that can prevent the noise caused by cutting grooves as much as possible.The gist of the invention is to place a pipe horizontally and press the pipe from above to fix it. At the same time, the packet is filled with a liquid such as water or cutting oil to submerge all or part of the pipe, and the packet is slid onto a plurality of columns set upright along the pipe. The plate is mounted so that it can slide vertically, and a rotary blade is attached to the slide plate in the vertical direction, and when the slide plate is lowered, the rotary blade cuts a predetermined length onto the circumferential wall of the pipe, which is wholly or partially immersed in liquid. A grooving device for a strainer for a well, characterized in that the slit is formed.

Hereinafter, this invention will be explained in detail based on the illustrated embodiment. In the figure, 1 is a packet containing a pipe P for cutting grooves, and this packet 1 is filled with a liquid 2 such as water or cutting oil. A plurality of pedestals 3 having recesses 3a having a V-shaped cross section into which the pipe P fits are arranged on the bottom surface, and a hydraulic cylinder is installed at both ends of the packet 1 on one side as a member to clamp the end face of the pipe P. 4, and a press plate 8 which is rotatably supported by the frame T via a shaft 6 are attached to the other side, and a gear 9 is fixed to the shaft 6. can be rotated by a small gear 11 with a handle 10 that meshes with this gear 9.

The frame T is configured to be able to move laterally using a hydraulic cylinder 12, and ball bearings are provided at both ends of the packet 1 to allow movement of the tube P in the circumferential and longitudinal directions. A movable pedestal 14 is installed which lifts the pipe P upward via the pipe 13.

Reference numeral 15 denotes a plurality of columns erected at regular intervals along one side of the packet 1, and a slide plate 1 is attached to the front side of the column 15 via a base 16 fixed thereto.
7 are installed so that they can slide freely in the vertical direction,
The slide board 17 is equipped with two rotary blades 18 at both ends of the lower part of its front surface and a motor 19 for rotating the blades at the upper part thereof, and a wire rope 20 is fixed to each end of the upper surface of the slide board 17. The other end of each arm 20 is connected to a balance weight 24 inside the column 15 via pulleys 22 and 23 inside an arm 21 provided at the upper end of the column 15, respectively.

The rotary blades 18 are each fixed to a horizontal rotating shaft with an equal distance between them and the rotary blades on both sides, and the tip of the rotary blade 18 is at the top of the vertical center line Y of the pipe P. positioned.

Hydraulic cylinders 25 move the slide plate 17 up and down, and are fixed to the base 16, respectively, and a switch 26 is provided on the front surface of the base 16 to switch the piston loft of the hydraulic cylinder 25 from downward to upward. A pressing piece 28 for operating the switch 26 is attached to the upper surface of the slide board 17 via an adjustment frame 27 so as to be slidable in the vertical direction.

Further, 29 is a stop switch that regulates the stop position of the slide plate 17 when it goes up and back, and 30 is a motor switch for the rotary blade 18, which is attached to the side of the base 16, respectively. It is opened and closed by pressing pieces 31 and 32 attached to the panel 17.

The motor switch 30 also serves as a switch for slowing the downward movement of the slide board 17.

33 is a hydraulic cylinder for fixing the pipe P, which is fixed vertically to a plurality of support stands 34 set between the columns 15, and a clamper 35 whose lower surface is recessed into a V-shape is attached to the tip of the piston loft. Through this clamper 35, the pipe P can be vertically pressed and fixed toward the pedestal 3 from above.

In addition, 36 in the figure is a stand on which the pipe P that has been processed is placed, and the liquid 2 such as water or cutting oil attached to the pipe P is removed from this stand 3.
This is for collecting the liquid by gravity flowing down into the packet 41 through the cover 36a of No. 6.

This invention is constructed as described above, and its operation will be explained below.

First, put the pipe P into the packet 1, and add liquid 2 such as water or cutting oil.
While soaking in water, it is fitted between the recesses 3a of the pedestal 3 and hung horizontally, and the ends of the pipe P are stretched by the lofts of the hydraulic cylinders 4 and 12, respectively, and clamped between the left and right holding plates 5 and 8, The pipe P is pressed and fixed onto the pedestal 3 by a fixing hydraulic cylinder.

Next, the power switch is turned on and the hydraulic cylinder 25 is operated to lower the slide plate 17, but this lowering is performed at a relatively fast speed.

Then, the pressing/pressing piece 3 is moved by this descending slide plate 17.
1 moves away from the stop switch 29 and the pressing piece 32
closes the motor switch 30, so the motor 19 is driven and the rotary blade 18 rotates, while the slide plate 17 moves slowly toward the pipe P.

The rotary blade 18 cuts the wall of the pipe P to create a predetermined length of sulin)B
When the pressing piece 28 closes the changeover switch 26 and stops the slide board 17, it is raised by the action of the hydraulic cylinder 25, and the pressing piece 31 closes the stop switch 2.
By closing 9, the slide plate 17 stops at the lowering start position.

Therefore, the fixing by the fixing hydraulic cylinder 33 is released, the pipe P is slightly lifted by the movable pedestal 14, and the pipe P is rotated by a desired angle by the small gear 11 with the handle 10 via the left and right holding plates 5 and 8. , the pipe P is moved in the length direction by the hydraulic cylinders 4 and 12, and then the fixing hydraulic cylinder 33 is moved again.
Fix it with.

Then, slits B are formed in the wall of the tube P in the same manner as described above.

Since the present invention has the above-described configuration, the pipe P is grooved while being wholly or partially immersed in a liquid 2 such as water or cutting oil. Therefore, the cutting sound generated at this time is caused by the liquid 2, and the conventional drawback that this sound reverberates and resonates within the tube P, acting as if it were a resonator, resulting in intense noise, is eliminated.

Moreover, this liquid 2 plays a role as a coolant and a lubricant, thus extending the life of the cutter and improving the finished surface.
There are various effects such as being able to improve the accuracy of the shape and dimensions of the workpiece.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view and FIG. 2 is a side view. 1...Packet, 2...Liquid, 3...
...Base, 5゜8...Press plate, 14...
...Movable pedestal, 15...Column, 16...
...Base, 17...Slide board, 18...
... Rotating blade, 19 ... Motor, 20 ...
...Wire rope, 24...Balance weight, 25...Hydraulic cylinder, 26...
Changeover switch, 29...Stop switch, 30.
...Motor switch, 28, 31゜32...
...Press piece, 33...Fixing hydraulic cylinder.

Claims (1)

[Claims] 1. A pipe is placed horizontally, and a cradle is installed in the packet to press and fix the pipe from above, and the packet is filled with water, cutting oil, etc. to soak all or part of the pipe. A slide plate is mounted on a plurality of columns erected along the pipe so as to be able to slide vertically, and a rotary blade is attached to the slide plate in the vertical direction. A grooving device for a strainer for a well, characterized in that a slit of a predetermined length is formed in the circumferential wall of a tube, which is wholly or partially immersed in liquid, by a rotary blade when descending.