JPH0454220Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a collector ring cooling structure for a conductor roll used in a steel strip electroplating device.

[Prior Art] In a steel strip electroplating device, a large current for electroplating is passed from a fixed positive electrode to a steel strip to be plated that is continuously moving in a plating solution, and the steel strip is brought into contact with the steel strip to be plated. The steel strip is electroplated continuously by extracting current to the stationary side through a conductor roll that rotates at the same circumferential speed as the moving speed, a collector ring attached to the conductor roll shaft, and an electric brush that comes into contact with it. .

The collector ring fits into the conductor roll shaft on its tapered surface and is fixed by tightening nuts, but if the temperature rises due to the heat generated at the contact parts between the collector ring and the conductor roll shaft, and between the collector ring and the electric brush, the collector ring will become damaged. Thermal expansion causes a decrease in the contact area with the conductor roll shaft and a decrease in contact surface pressure, which further increases the temperature of the collector ring and makes it impossible to obtain stable current flow.

To deal with this problem, as described in Japanese Utility Model Publication No. 60-34024, the collector ring is cooled by bypassing or branching the cooling water flowing through the conductor roll shaft into a cooling water channel provided inside the collector ring. It is proposed that.

[Problem to be solved by the invention] However, with the structure shown in the above proposal, it is inevitable that cooling water leaks to the contact surface between the collector ring and the conductor roll shaft, which impedes stable current flow. It becomes a factor.

The purpose of the present invention is to provide a collector ring cooling structure for a conductor roll for electroplating that can water-cool the collector ring and ensure stable current flow without water leakage to the contact surface between the collector ring and the conductor roll shaft. .

[Means for Solving the Problem] In order to achieve the above object, the present invention provides an annular cooling water chamber at either end of a collector ring attached to a conductor roll shaft, and a plurality of heat pipes are connected to the annular cooling water chamber. buried inside the collector ring so that the condensation part is located within the cooling water chamber,
The cooling water inlet and outlet opened on one end of the collector ring are connected to the branch joint provided at the end of the conductor roll shaft by piping, respectively.
The present invention is characterized in that conductor roll cooling water is branched and detoured to the cooling water chamber of the collector ring.

[Function] In this structure, the supplied cooling water flows through one of the pipes from the branch joint to the cooling water inlet on one end face of the collector ring, passes through the cooling water chamber, and then flows into the cooling water inlet on the same end face. Water flows out from the outlet, returns to the branch joint through another pipe, and is sent to the conductor roll via a passageway to the conductor roll shaft, so water leaks to the contact surface between the collector ring and the conductor roll shaft, inhibiting stable current flow. There is no fear that it will. Also, during this time, the heat generated at the contact points between the collector ring and the conductor roll shaft and between the collector ring and the electric brush is absorbed by the heat pipe, and the heat transferred to the condensation section of the heat pipe is transferred to the cooling water chamber of the collector ring. The entire collector ring can be effectively cooled by simply providing a cooling water chamber at either end of the collector ring.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3.

In the figure, 1 is a conductor roll shaft, and a water passage 2 is provided at the center of the shaft. The collector ring 3 fits around the conductor roll shaft 1 at its tapered surface 4, and is fixed by tightening with a nut 5. Although not shown in the figure, a plurality of electric brushes come into contact with the outer peripheral surface of the collector ring 3 to collect current. In this embodiment, an annular cooling water chamber 6 is provided inside the collector ring 3 by cutting from the end surface on the conductor roll side, and a blind lid 8 is placed on the back side of the cooling water chamber 6 via a seal 7. Natsuto 9
Tighten and seal. In addition, the two through holes 10 and 11 that reach the cooling water chamber 6 from the shaft end side end face of the collector ring 3 are inserted, and the end face side opening of the through hole 10 is connected to the cooling water inlet 12, and the end face side opening of the through hole 11 is connected to the end face side opening of the through hole 10. As the cooling water outlet 13, one end of the cooling water piping 14, 15 is connected to each of the cooling water piping 1.
The other ends of 4 and 15 are connected to branch connection ports 17 and 18 of branch joint 16, respectively. The cooling water outlet side end of the branch joint 16 is screwed and fixed to the shaft end of the conductor roll shaft 1 to form the branch connection port 1.
8 and the water passage 2, and the end on the cooling water inlet side is screwed and fixed to the hollow shaft part 21 mounted on the inner ring side of the ball bearing 20 of the rotary joint 19, thereby connecting the branch connection port 17 and the hollow shaft part 21. A cooling water pipe 23 on the fixed side is connected to the body 22 which is connected to the outer ring side of the ball bearing 20 of the rotary joint 19. 24 is rotary joint 1
This is the seal portion of No.9.

As shown by the arrow in FIG. 1, the cooling water supplied from the cooling water piping 23 on the fixed side via the rotary joint 19 is passed from the branch connection port 17 of the branch joint 16 to the cooling water piping 14 into the collector ring. The cooling water is guided to the cooling water inlet 12 of No. 3, and the through hole 1
0, after bypassing the cooling water chamber 6 and the through hole 11, the cooling water pipe 15 from the cooling water outlet 13 returns to the branch connection port 18 of the branch joint 16, and the end of the cooling water outlet side of the branch joint 16 It is sent to a conductor roll (not shown) through a water passage 2 of a conductor roll shaft 1 connected to the conductor roll shaft 1 .

As shown in FIGS. 2 and 3, inside the collector ring 3, a plurality of heat pipes 25 are evenly arranged and embedded from the cooling water chamber 6 side, and the phase of the working fluid sealed in the heat pipes 25 is Due to this change, the heat generated at the contact parts between the collector ring 3 and the conductor roll shaft 1 and between the collector ring 3 and the electric brush (not shown) is absorbed by the evaporator 25a and cooled by the condenser 25b placed in the cooling water chamber 6. The collector ring 3 is cooled by dissipating heat into the water.

The position of the cooling water chamber 6 is not limited to the conductor roll side, and may be located at either end of the collector ring 3. When the cooling water chamber 6 is provided on the conductor roll shaft end side of the collector ring 3, the cooling water inlet 12 and the cooling water outlet 13 can be provided in a blind cover on the back side of the cooling water chamber. Also, blind lid 8
The method of fixing is not limited to nut tightening, but may also be bolt tightening or welding.

[Effect of the idea] According to the present invention, there are the following effects.

(1) Cooling water is branched between the rotary joint and the end of the conductor roll shaft that is away from the contact surface between the collector ring and the conductor roll shaft, and the water is passed inside from one end face of the collector ring to the cooling water chamber. , Water leakage to the contact surface between the collector ring and the conductor roll shaft, which is the current-carrying surface, can be completely prevented, and there is no risk of water leakage interfering with stable current flow.

(2) By using a heat pipe to promote heat transfer from the heat generating part to the cooling water, the cooling water chamber can be provided only at one end of the collector ring, minimizing the number of leakage prevention points, making maintenance easier. becomes easier.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Figure 1 is a cross-sectional view taken along line A-A in Figure 3, Figure 2 is a cross-sectional view taken along line B-B in Figure 3, and Figure 3 is a cross-sectional view taken along line C in Figure 1. -C sectional view. 1... Conductor roll shaft, 2... Water passage,
3...Collector ring, 6...Cooling water chamber, 12
...Cooling water inlet, 13...Cooling water outlet, 14,1
5...Cooling water piping, 16...Branch joint, 1
9... Rotary joint, 25... Heat pipe, 25a... Evaporation section, 25b... Condensation section.

Claims (1)

[Scope of utility model registration request] An annular cooling water chamber is provided at either end of the collector ring attached to the conductor roll shaft, and a plurality of heat pipes are buried inside the collector ring so that their condensing parts are located within the cooling water chamber. A cooling water inlet and an outlet opened at one end face of the collector ring are respectively connected by piping to a branch joint provided at the end of the conductor roll shaft, so that the conductor roll cooling water is branched and detoured to the cooling water chamber of the collector ring. A collector ring cooling structure for conductor rolls for electroplating.