JPS587374B2 - Tube wrapping device for stainless steel Hampson heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube wrapping apparatus for manufacturing tube bundles for Hampson heat exchangers.

As shown in FIGS. 1 and 2, the structure of the Hampson heat exchanger is as follows: A tube bundle 1, in which tubes 2 are spirally wound around a core metal 3, is inserted into a shell 4, and tube sheets 5 are placed at both ends. installation, and the channel cover 6 is also installed, keeping the gap between the tubes 2 small.
Manufacturing the tube bundle 1 by winding it in a spiral is the most important step in manufacturing the Hampson heat exchanger. Conventional Hampson heat exchangers use tubes made of copper or aluminum depending on the usage conditions. Since these tubes are made of soft material, the work of winding the tubes in a spiral to create tube bundles was mainly done by hand.

However, depending on usage conditions, when manufacturing a tube bundle using stainless steel tubes, since the material of the tube is hard, winding cannot be performed and manufacturing is impossible.

The object of the present invention is to mechanically and automatically perform the winding operation when the material of the tube is a hard material such as stainless steel.

The present invention supplies a tube by a feed roller unit attached to an arm column, pre-bends the tube to a predetermined curvature by a bending roll unit, and then supplies the tube to a rotating mandrel for winding. By moving the arm column in the axial direction of the mandrel in conjunction with the rotation of the mandrel, the work of winding the hard material tube can be performed mechanically and automatically.

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 3 to 6.

11 is a headstock provided with a main motor 12, a transmission 13, a continuously variable transmission 14, a reversing gear 15, and a reduction gear unit 16;
17 is a slave spindle supporting the core metal 18 between it and the headstock 11;
19 is a bed connected to the headstock 11, 20 is bed 1
9 is a reciprocating table slidably provided on the reciprocating table 9; 21 is a screw rod for feeding the reciprocating table 20 with one end connected to the reversing machine 15 and the other end supported by the bed 19 to move the reciprocating table 20; 22 a screw rod for feeding the reciprocating table 20; A reciprocating table inching unit 23 performs inching such as fast forwarding or returning independently of the movement by 21, and 23 is an arm column mounted on the reciprocating table 20, which can be raised and lowered by an arm lifting unit 24.

25 is a bending roll unit that is attached to one end of the arm column 23 and pre-bends the tube 26 to a predetermined curvature; 27 is a bending roll unit that attaches a feed roller 27a and an electric motor with a continuously variable transmission to the same slide base 27b; A feed roller unit of a tube 26 is slidably attached to the other end of the column 23; 28 is a limit switch for increasing and decelerating attached at an appropriate interval before and after the feed roller unit 27 of the arm column 23; Reference numeral 29 denotes an operation table integrally connected to the carriage 20, 30 an operation panel attached to the operation table 29, and 31 a tube guide attached to the mandrel 18.

The work of winding the tube 26 is to wrap the tube 26 between the feed roller unit 27 and the penden roll unit 25.
When the main motor 12 is driven after the tip is fixed to the mandrel 18 supported between the headstock 11 and the vertical axle 17 through the
At the same time as the mandrel 18 is rotated via the deceleration unit 16, the arm column 23 rotates the shaft of the mandrel 18 via the transmission 13, the continuously variable transmission 14, the reversing gear 15, the feed screw rod 21, and the reciprocating table 20. direction, and the tube 26 is wound around the mandrel 18 according to the pitch of the tube guide 31 attached to the mandrel 18.

In this case, the tube 26 is connected to the feed roller unit 2
7 while penden grow unit 2
5, the mandrel 18 is pre-bent to a predetermined curvature.
Even if the tube 26 is made of a hard material, the winding operation can be easily performed.

That is, the tube 26 is connected to the bending roll unit 2.
According to 5, if preliminary bending is performed to a radius of curvature corresponding to the 50th factor of the winding diameter, the remaining 50% of the bending is performed by winding around the mandrel 18 using the rotating torque of the main shaft. The curvature of the preliminary bending process by this penden roll unit 25 can be arbitrarily selected depending on the hardness of the tube 26, the winding diameter, etc.

The rotational speed of the winding core 18 and the moving speed of the arm column 23 are:
It is possible to synchronize the rotation of the main shaft and the rotation of the feed screw rod 21, and the tube 26 can be wound along the tube guide 31, but due to installation errors of the tube guide 31, etc. If it is difficult to insert the tube 26, the carriage inching unit 22 can be operated to make adjustments.

Further, the amount of winding of the tube 26 due to the rotation of the mandrel 18 and the amount of the tube 26 supplied from the feed roller unit 27 via the bending roll unit 25 can be adjusted by adjusting the supply speed of the tube 26 to the mandrel 18. When the winding speed is high, the slide base 27b is pulled through the tube 26 and the speed increasing side limit switch 28
is activated, and the electric motor, ie, the piston motor, increases the rotational speed of the feed roller 27a and changes the speed until the feeding speed of the tube 26 becomes the same speed as the winding speed of the mandrel 18.

In this case, the tube 26 and feed roller 27a are sliding until the feeding speed of the tube 26 reaches the same speed as the winding speed of the mandrel 18, but when the feeding speed reaches the same speed, the slide base 27b is returned to the neutral position by the spring. held in position.

On the other hand, when the winding speed of the mandrel 18 is lower than the feeding speed of the tube 26, the slide base 27b is pushed through the tube 26, the limit switch 28 on the deceleration side is activated, and, contrary to the above, the feed roller The rotational speed of the tube 27a is reduced to change the feeding speed of the tube 26 until it becomes the same speed as the winding speed of the mandrel 18.

Therefore, the amount of tube 26 supplied can be automatically controlled in accordance with the amount of winding of mandrel 18.

Therefore, by gathering the main motor 12, the carriage inching unit 22, and other control mechanisms necessary for operation on the operation panel 30 and controlling them electrically, it is possible to automate the operation of the apparatus.

As described above, the present invention supplies a tube by a feed roller unit attached to an arm column, pre-bends the tube to a predetermined curvature by a bending roll unit, and then supplies the tube to a rotating mandrel for winding. Since the arm column is moved in the axial direction of the mandrel in conjunction with the rotation of the mandrel, it is possible to mechanically and automatically wind the hard tube. It is possible to manufacture a Hampson heat exchanger using stainless steel tubes, etc.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of a Hampson heat exchanger, FIG. 2 is a sectional view taken along line A-A in FIG. Figure 3 is an overall perspective view, Figure 4 is a front view, and Figure 5 is a
The BB sectional view in the figure and FIG. 6 are system diagrams. 11... Headstock, 12... Main electric motor, 13... Transmission,
14... Continuously variable transmission, 15... Reversing gear, 16... Reduction gear unit, 17... Follower shaft, 18... Core metal, 19...
bed, 20... carriage, 21... feed screw rod, 22...
... Carriage table inching unit, 23... Arm column, 24...
... Arm lifting unit, 25 ... Bending roll unit, 26 ... Tube, 27 ... Feed roller unit, 27a ... Feed roller, 27b ... Slide base, 28 ... Limit switch, 29 ... Operation table, 30 ...Operation panel, 31...Tube guide.

Claims (1)

[Claims] 1. An arm column equipped with a device that supports and rotates both ends of a mandrel, a bending roll unit that pre-bends a tube to a predetermined curvature, and a feed roller unit that supplies the tube. A tube wrapping device for a Hampson type heat exchanger, characterized by being provided with a mechanism for moving an arm column in the axial direction of a mandrel. 2. A tube wrapping device for a Hampson heat exchanger according to claim 1, in which the rotational speed of the mandrel and the moving speed of the arm column are linked. 3. Tube wrapping of the Hampson heat exchanger according to claim 1, which is provided with a mechanism that automatically controls the amount of tube supplied by the feed roller unit in accordance with the amount of tube wrapping by rotation of the mandrel. Device.