JPH01252732A - Heat-treating device for u bent pipe - Google Patents

Abstract

PURPOSE:To uniformly cool a U bent pipe by forming the title device with a truck for heat-treating a bent pipe part having plural headers having different curvatures and provided with many refrigerant injection nozzles with variable injection angles and plural movable racks. CONSTITUTION:When a U bent pipe is set, an upper clamping die 14 is lowered by a vertical cylinder 22 to clamp the U bent pipe, and the pipe is energized and heat-treated. When heat treatment is finished, the upper clamping die 14 is raised by the cylinder 22 to release the U bent pipe, the stop valves of the upper and lower headers opposed to the bent part of the U bent pipe are operated to inject a refrigerant, and the pipe is cooled. In this case, the injection angle of the flat nozzle 47 of an injection nozzle 44 can be adjusted. The bent pipe parts having different curvatures can be coped with, the pipe can be cooled without leaving any uncooled part, and the deformation of the metal can be prevented. Since the heat-treating truck 1 and the rack 60 can be moved, the U bent pipe can be easily and rapidly positioned in accordance with its length.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat treatment apparatus for a curved pipe portion of a beam bent pipe.

(Prior Art) A conventional heat treatment apparatus for a curved pipe portion of a U-bend pipe, as shown in FIG. ) and a pair of upper clamps (7b) placed opposite to each other on the U-bend pipe (
Upper and lower cooling headers (8) with the same curvature as the curved pipe section in 10)
, and a fixed skid (9) that supports the parallel pipe section of the U-bend pipe.

U-bend pipe (10) is produced by a heat treatment apparatus having such a configuration.
When heat-treating the curved pipe portion of The curved pipe portion is heated, and then air is injected from injection holes provided in the upper and lower cooling headers (8) to cool it.

Heat treatment of the curved pipe section The cooling header (4) is separated from the pipe, the pipe clamp is released, and the U-bend pipe (10) is removed.

[Problems to be Solved by the Invention] However, the conventional heat treatment apparatus for U-bend pipes has the following drawbacks.

■ Because the heat treatment equipment body equipped with current-carrying clamps, etc. and the stand supporting the parallel pipe portion of the U-bend pipe are fixed, it takes time and effort to align the U-bend pipe to the heat treatment equipment, reducing work efficiency. It's bad.

■ The cooling header is a single pipe with the same curvature as the curved section of the U-bend pipe, with air injection holes drilled at appropriate intervals, so the cooling header is designed to match the curvature of the curved section of the U-bend pipe. There are more than 100 different curvatures of the curved pipe part of the Shikachiri vent pipe, and the same number of cooling headers with different curvatures are required, which not only increases manufacturing costs but also requires a large space to store the cooling headers. I need.

■ Since the cooling header is replaced every time the curvature of the U-bend pipe changes, it takes a lot of effort and time to change the setup.

■ Since the air injection nozzle is a simple drilled hole, the injection flow is a circular direct injection type, and as shown in Fig. 7, the injection projection plane a is circular, so there is a gap between the injection flow and the injection flow toward the pipe (10). Uncooled parts inevitably occur, making it impossible to cool uniformly.

This invention was made to eliminate these drawbacks of the conventional technology, and allows efficient heat treatment.
Furthermore, the present invention attempts to propose a heat treatment apparatus that can cool uniformly.

[Means for Solving the Problems 1] The present invention provides a current-carrying clamp device including a pair of current-carrying clamps that can be moved into and out of contact with each other, a support roller that supports a curved pipe portion of a U-bend pipe, and a support roller that supports a curved pipe portion of a U-bend pipe, and A curved tube section heat treatment truck equipped with a cooling header consisting of a plurality of header tubes with different curvatures and equipped with a large number of refrigerant injection nozzles with variable injection angles, and a U-bend tube parallel tube section with multiple units movable in the axial direction. The gist is a heat treatment apparatus consisting of a movable pedestal.

[Function 1: The heat treatment trolley beam moves in the axial direction of the parallel pipe section according to the length of the vent pipe.

The energizing clamp device for clamping the U-bend pipe is installed on a stand set upright on the heat treatment cart, and clamps the energizing clamp by adjusting the interval between the energizing clamps according to the interval between the parallel pipe portions of the U-bend pipe.

The curved pipe support rollers are arranged on the same surface so as to support all the U-bend pipes with different curvatures. prevent bending.

In the cooling header, a plurality of header pipes with different curvatures are arranged and installed in two stages, upper and lower, on a frame installed on the heat treatment cart, and the upper header pipes and the lower header pipes are connected to each other with the same curvature,
The refrigerant is supplied from a supply main pipe connected to each header pipe.

A large number of refrigerant injection nozzles are installed in each of the upper and lower header pipes. For example, a ball joint type spray nozzle whose injection direction can be changed arbitrarily is used, and by using a nozzle whose refrigerant injection angle is variable, it is possible to By adjusting the injection direction even if the curvature of the part and header pipe is different,
Uncooled parts can be reduced.

In addition, by providing multiple cooling headers with different curvatures on the heat treatment cart, there is no need to replace the cooling header each time the curvature differs, and all you have to do is select and use the cooling header that corresponds to the curvature. can be significantly shortened.

Since the movable pedestal supporting the parallel tube portion of the U-bend tube is movable in the same direction as the heat treatment apparatus, the tube support position can be changed arbitrarily depending on the length of the U-bend tube.

[Embodiment] Fig. 1 is a plan view showing a device according to an embodiment of the present invention, Fig. 2 is a side view of the same device, Fig. 3 is a front view of the same device, and Fig. 4 is a front view of the same device.
The figure is a front view showing an example of a refrigerant injection nozzle.

The apparatus of this invention is broadly divided into a heat treatment cart (1) and a movable stand (60).
) is equipped with an energizing clamp device (2), a curved pipe support roller (50), and a cooling header (3).

The heat treatment trolley (1) is placed on a rail (4) laid in the axial direction of the parallel tube part of the U-bend pipe.
) The mechanism is such that it is moved by a drive motor (5) installed on the top.

The energizing clamp device (2) is a pair of left and right lower clamp types (1) installed on the pedestal (11) on the heat treatment cart (1).
2), and a pair of energized clamps consisting of a pair of left and right upper clamp molds (14) arranged opposite to the lower clamp mold (12) on a U-shaped frame body (13) installed on the same truck. However, the left and right lower clamp molds (12) are fixed on a movable base (16) that is slidably attached to a guide shaft (15) installed horizontally on the same frame (11), and this movable base (16) A rotating screw shaft (1) with opposite left and right screws supported by a bearing (19)
7), and the left and right movable bases (16) can be moved toward and away from each other by rotation of the rotary screw shaft (17).

The upper clamp mold (14), which is disposed opposite to the lower clamp mold (12), is attached to a movable base (2) slidably attached to two guide shafts (20) installed horizontally on the upper frame of the U-shaped frame (13).
1) with a vertical cylinder (22) so that it can be raised and lowered, and a bearing (23) is mounted on both ends between the two support shafts (20).
The movable base (21) is screwed onto a rotary screw shaft (24) with left and right reverse threads supported by the rotary screw shaft (24), and the left and right movable bases (21) can be moved into and out of contact with each other by rotation of the rotary screw shaft (24). It has become.

The rotation mechanism of each rotary screw shaft (17) (24) of the lower clamp type (12) and upper clamp type (14) is a drive shaft ( 26), and a lower rotation transmission shaft (3) supported at both ends by bearings (29) between the pedestal (11) and the U-shaped frame (18).
0), an upper rotation transmission shaft (32) supported at both ends by bearings (31) in a U-shaped frame (13), and a bevel gear (32).
) (33) (34) (35) to each rotating screw shaft (17) (2) of the upper and lower clamp type (12) (14)
4) is a mechanism that rotates synchronously.

Note that a power supply cable (not shown) is connected to the pair of lower clamp molds (12).

Next, the cooling header (3) is installed with piping on the upper and lower cross beams (40) and (41) of the U-shaped frame body (38) installed on the upper surface of the heat treatment truck.

That is, as shown in FIG. 1, the cooling header (3) has a large number of upper header pipes (3a
-1) (3a-8) CfCf lower jitter tube b- to cL
1) (3b-8) is fixed on the upper and lower cross beams (40) and (41) with pipe clamps (42H43), and each of the upper and lower header pipes has the same curvature as the connecting pipes (3-11) to ( 3-18>, and air supply pipes (3-21) to (3-28) are connected to each connection pipe.

Each supply pipe is provided with on-off valves (vl) to (v8), and
It has a structure that can be used selectively depending on the curvature of the curved pipe part of the bent pipe.

The refrigerant injection nozzle (44) of the cooling header (3) is connected to each header pipe (3a-1) (3a-8), (3b-1) (3b-8).
) A large number of header pipes (3a-1
), a ball joint (46), and a flat nozzle (47>), and the flat nozzle (47) can be used for neck shooting.

Further, on the heat treatment cart (1), there is a support roller (5) made of ceramics, for example, for supporting the curved pipe part of the U-bend pipe.
0) is installed. This support roller (50) is attached to a support shaft (53) on a vertical cylinder (51) installed on the heat treatment cart.
) is rotatably supported by a mounting base (52) which is dogleg-shaped in plan view.

The support roller (50) is supported by the vertical cylinder (51) so as to be able to move up and down so that the U-bend tube after heat treatment can be easily taken out from the lower clamp mold (12).

A plurality of movable stands (60) supporting the parallel pipe portion of the U-bend pipe are placed on a common rail (4) with the heat treatment cart (1), and can be positioned arbitrarily according to the length of the U-bend pipe. It can be changed.

Note that (62) is a guide roller, and (63) is a power transformer.

In the above equipment, when heat treating a U-bend pipe,
Heat treatment trolley (1) according to the length of the U-bend pipe in advance
After positioning the movable frame (60) on the rail (4), the lower clamp type (12) and upper clamp type (14) for energization are connected to the motor according to the distance between the parallel pipe parts of the U-bend pipe. (25), set the interval by synchronous movement, place the required part of the parallel pipe part of the U-bend pipe on the lower clamp mold (12), and place the curved pipe part on the support roller (50), The parallel tube section is supported by a movable pedestal (60).

Once the U-bend pipe is set, the upper clamp mold (14) is lowered by the vertical cylinder (22) to clamp the U-bend pipe, and heat treatment is applied by applying electricity.

When the heat treatment is completed, the upper clamp mold (14) is raised by the vertical cylinder (22) to release the clamp on the U-bend pipe, and then the upper and lower header pipes facing the curved pipe part of the U-bend pipe are opened and closed. Operate the valve to inject refrigerant for cooling. At that time, the flat nozzle (
47) Adjust the injection angle to inject the refrigerant.

In the case of a flat nozzle (47), the injection angle of the refrigerant is usually about 50 degrees, and the injection projection plane has an elliptical shape as shown in FIG. Therefore, by changing the jet direction of the flat nozzle (47) and jetting it obliquely to the U-bend pipe, the jet streams are brought into contact with each other, as shown in the jet projection plane C in FIG. As a result, an uncooled portion (6) unlike the conventional jet flow shown in FIG. 7 does not occur on the surface of the U-bend pipe (10), and uniform cooling becomes possible.

[Effects of the Invention] As explained above, the heat treatment apparatus of the present invention has the following effects.

- Since the pedestal supporting the heat treatment apparatus main body and the parallel tube section is movable, it can be easily and quickly positioned according to the length of the U-bend tube.

■ The upper clamp type and lower clamp type of the energizing clamp device of the heat treatment equipment are set in synchronization using a motor drive system, allowing quick and accurate spacing adjustment even if the curvature of the curved pipe section differs. can.

■ Since the cooling header is composed of multiple header pipes with different curvatures, there is no need to replace the header each time the curvature of the curved pipe section differs, and you can select and use the header pipe according to the curvature. Therefore, setup changeover time can be significantly shortened and work efficiency can be improved.

■ By using a variable injection angle nozzle for the refrigerant injection nozzle, the injection direction can be changed arbitrarily, making it possible to handle curved pipe sections with different curvatures, as well as uniformly cooling without creating uncooled parts and preventing material deformation. can be prevented.

■ There is no need to manufacture cooling headers for each U-bend pipe with a different curvature, and the problem of storage space for cooling headers can be solved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention. FIG. 2 is a side view of the same device. FIG. 3 is a front view of the same device. FIG. 4 is a front view showing an example of a refrigerant injection nozzle in the same device. FIG. 5 is a schematic diagram showing the jet projection plane by the jet nozzle of the same device. FIG. 6 is a schematic perspective view showing a conventional general heat treatment apparatus. FIG. 7 is a schematic diagram without showing the jet projection plane of the jet nozzle of the same device. 1...Heat treatment cart 2...Electrification clamp device 3...Cooling header 12...Lower clamp mold 14...Upper clamp mold 42...Refrigerant injection nozzle 50...Support roller 60... - Mobile mount applicant: Sumitomo Metal Industries, Ltd. Figure 3 Figure 4 77' ＼ To=ra Figure 5 Figure 7

Claims (1)

[Claims] A current-carrying clamp device equipped with a pair of current-carrying clamps that can be moved apart from each other, support rollers that support the curved pipe section of the U-bend pipe, and a large number of refrigerant injection nozzles with variable injection angles arranged oppositely above and below the curved pipe section. It is characterized by consisting of a curved pipe heat treatment cart equipped with a cooling header made up of a plurality of header pipes with different curvatures, and a plurality of movable stands movable in the axial direction of the U-bend parallel pipe part. Heat treatment equipment for U-bend pipes.