JPS6044375B2 - Multiple quenching equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a steel pipe dawning device.

Conventionally, the steel pipe (hereinafter abbreviated as pipe) device was
Devices that perform internal hardening are known.

However, in the conventional device, water is passed through one row of pipes by holding the end of the pipe in its mouth.
Also, since it is a one-way cooling method that cools from the inside, it is inefficient.

In order to improve this problem, there is a device that performs dawning by immersing a pipe in a water tank.

This device is sufficient for large-diameter pipes, but for small-diameter pipes, the water turns into steam inside the pipe and creates a board, making it difficult to drain the pipe. Therefore, they are immersed in water to harden the inner and outer surfaces, and they are also controlled to increase the inner flow velocity, but even then, the process takes a long time because it is done one row at a time. That is, the conventional device has a problem of low efficiency.

Furthermore, there is the problem that bends occur in the pipe, and this can be solved by holding the pipe end in your mouth to make the flow velocity on the inner surface sufficiently high.
A possible solution would be to clamp the pipe in several places along its length to forcibly restrain it and prevent it from bending.

This invention was made in order to solve these problems, and it involves arranging and suspending a plurality of pipes, clamping each pipe's body at multiple points in the longitudinal direction, and maintaining a sufficient flow velocity in the pipes. In order to obtain this, the pipe ends are pressed against the nozzle through a seal, and these pipes are raised and lowered into the dawning tank at the same time7, and water is passed into the pipes to perform the dawning, thereby improving efficiency. The present invention provides a multi-pipe dawning device.

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a side view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing the same embodiment of the invention and for explaining the operation.

In the figure, 1 is a quenching tank, 2 is a vibe hanging stand, and 3
A tube clamper device is provided at several locations along the length of the vibrator 1, and forcibly restrains the vibrator 7 from bending during hardening.

4a is a quenching head, 4 is a cooling water supply nozzle, 5 is a cooling water valve, and 6 is a tube end clamp device.

The pipe end clamping device 6 has a part in which the pipe end of the vibrator 7 is upset so that the cooling water supply nozzle 4 can be pressed against the pipe end, and the pipe end of the vibrator 7 is held down so that the pipe end clamping device 6 can press the cooling water supply nozzle 4 and prevent the vibrator 7 from moving due to the high flow velocity in the pipe. If there is one, it is matched to the shape of the upset part. Cooling water supply nozzle 4 of quenching head 4a
is pressed against the opening of the vibrator via a seal (not shown) by an air cylinder (not shown), so that the flow rate of water in the pipe can be made sufficiently large to obtain a sufficient quenching speed.

The flow of water into the vibrator 7 is controlled by opening and closing the cooling water valve 5. The vibe hanging stand 2 is composed of a base 21 and a trolley 22.

The tube body clamping device 3 and the tube end clamping device 6 are supported and assembled on a base 21, and a quenching head 4a having a cooling water supply nozzle 4 and a cooling water valve 5 are also supported on the base 21. The quenching head 4a and the cooling water valve 5 are machine parts. The rotor 4b is connected to constitute a cooling water supply device.
A flexible hose 24 for water passage is attached to the cooling water valve 5.
One end of the hose 24 is connected to the hose 24, and the other end of the hose 24 is connected to a water source (not shown) via the trolley 22. The base 21 is installed on a trolley 22. It is designed to be raised and lowered by a closed fluid cylinder 23. In addition, the vibe hanging stand 2 is moved along the rail 8 by the wheels 25 of the trolley 22 at the arrow 9
It is driven by a drive device (not shown) in the direction shown in FIG. Although the tube body clamping device 3, the tube end clamping device 6, and the cooling water supply device are not shown, they are moved on the base 21 by a pitch changing mechanism using a pantograph or the like so that the pitch P of the arrangement of the vibrators 7 is changed. It's summery.

Reference numeral 10 denotes a vibrator discharging device for discharging the vibrator from the quenching furnace 11.

Reference numeral 12 denotes a pipe aligning device, which has a pitch changing mechanism and increases the pitch of the array of four vibrators discharged by the vibrator discharge device and rearranges them.

Next, the operation will be explained.

First, the vibrator 7 is moved from the quenching furnace 11 to the vibrator discharge device 10.
It is discharged by The discharged vibrators 1 are rearranged in a pipe aligning device 12 by increasing the pitch of the vibrator array. The rearranged vibrators 7 are grabbed and lifted by the tube body clamping device 3 of the vibe hanging stand 2, and then the vibe hanging stand 2 is moved and placed in the quenching tank 1.
It is conveyed to the top of the screen, where it is temporarily stopped. Next, the tube end of the vibrator 7 is clamped by the tube end clamp device 6.

After that, the cooling water supply nozzle 4 is pressed. In this state, operate the lifting fluid cylinder 23 to move the water to the water surface A.
Place the base 2 of the vibrator hanging stand 2 into the quenching tank 1 that has been stored until now.
1 is lowered, and when the vibrator 7 reaches the water surface A, the cooling water valve 5 is opened to simultaneously flow cooling water into the four vibrators to start quenching. After a predetermined time, the base 21 is raised and the cooling water valve 5 is closed to stop water flow. This completes the hardening of the four vibrators. The tube end clamp device 6 is opened and the cooling water supply nozzle 4 is moved back. The tube body clamping device 3 is still clamping. Next, the vibrator suspension table 2 is moved onto the draining device 13, and the vibrator 7 is lowered onto the draining device 13 to drain the water.
At this time, the pitch of the arrangement of the vibrators in the draining device 13 is smaller than the pitch of the arrangement when moving the vibrators up and down into the quenching tank 1, so the pitch is adjusted to the pitch of the draining device 13 using a pitch conversion mechanism before lowering the vibrators. It's summery. The vibrator hanging table 2 with the vibrator 7 taken down moves to the upper part of the pipe aligning device 12, grabs a new vibrator 7, and transports it onto the quenching tank 1. At this time, the pitch of the vibrator array of the pipe aligning device 12 is the same as the pitch of the array when raising and lowering the vibrator to the quenching tank 1, so the pitch of the vibrator hanging table 2 is changed again before grasping. It's becoming like that. Thereafter, a plurality of vibrators are simultaneously hardened by the same operation as above, and this operation is performed continuously.

In the above embodiment, a case has been described in which water is stored in the quenching tank 1 to perform internal and external hardening, but if the water in the quenching tank 1 is drained, only internal hardening can be performed.

Furthermore, although the above description has been made regarding the case where four vibrators are quenched at the same time, the number of vibrators is not limited to four. As explained above, the present invention has the following effects.

(b) Multiple vibrators are suspended and held on a vibrator hanging stand, and the nozzle is pressed into contact with the tube end via a seal so that it can be raised and lowered into the quenching tank and quenched at the same time. By increasing the flow rate of the cooling water to obtain a sufficient hardening speed, hardening efficiency is improved.

(b) Since the tube body is forcibly restrained by clamping at several locations in the longitudinal direction, bending does not occur. (c) By selecting the water supply to the quenching tank, it is possible to selectively use the internal and external quenching methods. (d) The vibration is suspended and held on the vibration transport device, and a cooling water supply nozzle is attached to form a vibration suspension stand, and the vibration suspension is used to move the vibrator up and down into the quenching tank. Therefore, there is no need to separately provide a pedestal for raising and lowering the vibrator into the quenching tank, and the equipment can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing the same embodiment of the invention and for explaining the operation. In the figure, 1 is a quenching tank, 2 is a vibe hanging stand, and 3
4 is a tube body clamp device, 4 is a cooling water supply nozzle, 5 is a cooling water valve, 6 is a tube end clamp device, 7 is a vibrator, and 11 is a quenching furnace.

Claims (1)

[Scope of Claims] 1. A pipe body clamp device that clamps the pipe body of a steel pipe at a plurality of locations in the longitudinal direction, a pipe end clamp device that clamps the pipe end of the steel pipe, and an opening on the side of the pipe end clamp device of the steel pipe. A steel pipe suspension stand that has a plurality of cooling water supply devices that flow water into the steel pipes through nozzles that are press-contacted through seals, that can hang and hold a plurality of steel pipes in an array, and that can be raised and lowered, and the steel pipes. 1. A multiple quenching device, comprising: a quenching device provided under a hanging table, and quenching is performed by passing water into each steel pipe using the cooling water supply device. 2. Multiple quenching according to claim 1, characterized in that the quenching tank stores water up to a predetermined position when quenching the inner and outer surfaces of the steel pipe, and drains the water when only quenching the inner surface. Device. 3. The multiple quenching apparatus according to claim 1, wherein the steel pipe suspension table is raised and lowered by a fluid cylinder.