JP3137456B2 - Electrode sealing device for energization treatment tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode part in an electric power processing equipment used for various electric treatments of strip materials such as electroplating such as electrogalvanizing and electrotin plating, electrolytic polishing and electrolytic cleaning. The present invention relates to a sealing device.

[0002]

2. Description of the Related Art In a conventional electroplating or electrolytic treatment, an electrochemical reaction occurs between a steel strip 1 and an electrode 7 in an electrolytic solution bath. The distance between the anode and the cathode is important for the reaction efficiency. It is. That is, if the distance between the electrodes increases, the resistance of the electrolytic solution increases and the reaction efficiency decreases. Therefore, in principle, the distance between the electrodes is preferably as small as possible. However, in a horizontal (horizontal) treatment tank, the plate is fluttered in the vertical direction due to slack or poor shape of the steel strip 1 or a change in tension, and the steel strip 1 is likely to come into contact with the electrode 7. Therefore, conventionally, the distance of the electrode 7 in the operation state has to be set wider in consideration of the flutter.

Therefore, according to Japanese Utility Model Application Laid-Open No. 64-7269,
Conventionally, an electrode movable type plating apparatus in which the electrode position is variable has been proposed in order to change the electrode fixed at a fixed position during operation in accordance with the plate passing condition. One embodiment of the present invention is shown in FIG. Plating tanks 4, 4 which are divided vertically with the steel strip 1 running horizontally interposed therebetween, are arranged, and electrode plates 7, 7 are provided at the center of the plating tanks 4, 4, and at the front and rear ends of the plating tanks 4, 4. Is a pair of upper and lower energizing rolls 2 that contact and sandwich the steel strip 1
However, a pair of upper and lower nozzles 11 for jetting a plating solution toward both surfaces of the steel strip 1 are provided. 6 is an electrode holding plate, 5
Is an electrode (position) adjusting mechanism. In this invention, various adjustment devices in the general technical field are known for the mechanism for changing the electrode position, and the technical problem to be solved is how to realize a seal structure that follows the change in the electrode position. You can go. 8A in FIG.
Is a film-like flexible object stretched between the electrode holding plate 6 and the plating tank 4.

Further, an electrolytic processing apparatus disclosed in Japanese Patent Publication No. 59-15996 has been proposed to change the distance between electrodes in response to various passing conditions during operation. This will be described with reference to FIG. 9 (the same reference numerals in FIG. 9 denote the same parts as those in FIG. 8). The upper and lower electrode plates 7 are fixed to the electrode holding plate 6. Is four tubes with both ends overlapping vertically
Held by 8B. Tube 8B has 10 pipes each.
Provides a pressurized fluid. Since the tube 8B holds the electrode holding plate 6 from both sides and is held by the tube holder 82 fixed to the outside, the electrode holding plate 6 and the electrode plate 7 move to arbitrary positions due to expansion and contraction of the tube. it can. That is, in the invention of Japanese Patent Publication No. 59-15996, the tube 8B simultaneously realizes two functions of an electrode position adjusting means and a seal around the electrode.

In the invention of Japanese Utility Model Application Laid-Open No. 64-7269,
Although the movement of the electrodes during operation is possible, the sealing member 8A, which is a film-like flexible object, requires a great deal of labor for the mounting work because it is mounted between the electrode holding plate 6 and the plating tank 4.
In addition, leakage from the mounting portion is likely to occur. Further, since pressure is applied to the entire surface of the flexible object, the life of the object is estimated to be short. Exchange of the electrodes is also very difficult.

Regarding the invention of Japanese Patent Publication No. 59-15996,
In addition to the difficulty in replacing the electrodes, the horizontal expansion of the tube 8B is not constrained, so the pressure of the fluid that expands and contracts the tube cannot be so high, and the sealing performance must be reduced. There is a disadvantage that. To improve these points, a horizontal (horizontal) electrogalvanizing facility is proposed in Japanese Patent Application Laid-Open No. 63-140100.

FIG. 10 is an overall view of a horizontal plating tank described in the publication. Plating tanks 4, 4 which are vertically divided with a horizontally running steel strip 1 interposed therebetween, are arranged. And a pair of upper and lower energizing rolls 2 contacting and sandwiching the steel strip 1 at the front and rear ends of the plating tanks 4, 4. Nozzle for injecting 11
Are provided in a pair, and the electrode plates 7, 7 are connected to a power source via conductors 12, 12, respectively. Therefore, the electrode plate 7, which is an anode while the steel strip 1 is immersed in a plating solution, Electroplating is performed by applying a current between the electrode 7 and the energizing roll 2 serving as a cathode. As described above, it is necessary to change the distance between the electrode plates 7 and 7 and the steel strip 1 according to the plating operation conditions. Therefore, the height of the electrode plates 7 and 7 is increased while the steel strip 1 is passed. An opening having a shape corresponding to the shape of the electrode plates 7, 7 is provided in the plating tank 4 so as to be changed, and the electrode plates 7, 7 are closed by mounting them. , 4. The electrode plates 7, 7 are supported by electrode adjustment mechanisms 5, 5, such as jacks. For example, when the jack advances, the electrode approaches the steel strip 1, and when the jack retreats, the electrode moves away. In order to prevent the plating solution from leaking from the electrode portion to the outside in the operating state, the sealing member 8 is required in the gap g between the opening and the electrode plates 7.

FIG. 11 shows a lower electrode plate using an inflatable seal (expanding / shrinking tubular seal) proposed as a sealing member suitable for such a portion in the above-mentioned Japanese Patent Application Laid-Open No. 63-140100. 7A is an example of a seal portion around 7; FIG. 7A shows a state at the time of electrode replacement in which the electrode plate 7 is retracted, and FIG. 7B shows an operation state in which the electrode 7 is advanced, and is provided around the opening of the plating tank 4; The inflatable seal 8 is mounted in the recess 41 as a seal member.

This inflation seal 8 has a special cross-sectional shape as shown in FIG. 11 and is a tube-shaped seal having a rectangular cross section with a space formed therein, and is made of an elastic material such as rubber or resin. The cross-sectional shape is such that two surfaces corresponding to the inner and outer diameters of the ring are flat, and the other two surfaces are concave. When the pressure inside is increased by injecting a pressurized fluid from the base 82, FIG. As shown in FIG. 11 (a), the concave portion extends to increase the width, and when the fluid is discharged, the material returns to its original shape as shown in FIG. 11 (a) due to the elasticity of the material. Using this characteristic,
In the operation state of FIG. 11 (b), the inflatable seal 8 expands and makes strong contact with the electrode plate 7 to perform sealing. When the electrode is replaced as shown in FIG. The electrode plate 7 is easily moved backward, and the inflatable seal 8 is not damaged when the electrode moves.

By the way, in the invention of Japanese Patent Application Laid-Open No. 63-140100, the movement of the electrodes is performed by contracting the inflatable seal 8, and the movement of the electrodes in the operating state is not considered. That is, if the electrode plate 7 is moved up and down while being held down by the inflation seal 8, the internal fluid pressure must be reduced to enable the sliding of the sealing surface, and the electrolyte tends to leak from the sealing surface. was there.

[0011]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides an electrode part sealing device of an electric power supply equipment capable of changing the position of the electrode in accordance with the passing condition even during operation. The purpose is to provide.

[0012]

According to the present invention, there is provided an electric treatment tank having an opening corresponding to the shape of an electrode plate, and an electrode plate which is attached to the opening so that the distance from the steel strip can be adjusted. In the electrical treatment equipment of a steel strip consisting of, the outer peripheral or inner peripheral seal portion of the tubular sealing member that is interposed in the gap between the opening and the peripheral edge of the electrode plate and expands and contracts depending on the magnitude of the internal pressure, An electrode sealing device for an electrolytic treatment tank, comprising an edge-shaped elastic lip portion having a line contact portion.

[0013]

According to the present invention, the lip type is used for the inflation seal and the seal portion has the edge-like elastic lip portion having the line contact portion. Therefore, the contact surface is extremely thin linear or band-like. Yes, the electrode plate can be slid in the sealed state, and the electrode position can be adjusted arbitrarily according to the passing condition in the operating state. As a result, the efficiency of energization processing is improved, and a significant reduction in power is realized.

[0014]

【Example】

Embodiment 1 A first embodiment of the present invention will be described with reference to FIGS. FIG.
Is a side sectional view of the energization processing tank, and FIG. 2 is a plan view. FIGS. 1 and 2 show only the periphery of the electrode, but the entire structure of the energization processing tank is the same as that of FIG. 10 shown above, and has an arbitrary electrode moving mechanism such as a hydraulic jack and an electric screw (not shown). It is.

The electrode plate 7 is formed so as to cover the opening of the energization processing tank 4.
Are arranged, and an inflation seal 8 is provided in a seal groove 41 around the opening. 3A and 3B are enlarged views of the inflatable seal 8 used in the present invention. FIG. 3A is a non-operating state in which the electrode plate 7 is retracted and the inflatable seal 8 is contracted, and FIG. The inflated seal 8 has expanded and is in contact with the side surface of the electrode plate 7. The stroke (in / out distance) at the tip is about 8 to 15 mm.

The inflation seal 8 of the present invention is of a lip type. In FIG. 3, the upper side is a pressure side (high pressure side) and the lower side is a non-pressure side (low pressure side). The lip-type seal has an edge-shaped elastic lip 81 having a line contact portion at the seal portion, and the tip lip 81 is opened by the contact pressure in the inflated state or the pressure of the fluid in the region to be sealed such that the seal is opened. Therefore, the contact surface with the electrode is very thin linear or band-like, and there is almost no resistance during relative movement, so that the electrode can move freely while maintaining the sealed state. Also, compared to the type of FIG. 9, lower fluid pressure, for example, 0.8 to 1.2
Sealability can be maintained with a fluid pressure of about kg / cm ² .

As the pressure fluid for operating the inflation seal, for example, an electrolytic solution itself may be used in addition to normal factory pressure air. In this case, even if the seal is broken and the fluid leaks, the surroundings are not affected. FIG. 4 shows another example of a lip-type inflatable seal, and its operation is almost the same as that of FIG.

FIG. 5 shows that the electrode plate 7 is connected to the steel strip 1 in this embodiment.
FIG. 6 shows a state in which the inflatable seal 8 is retracted, the supply of the electrolytic solution is stopped, and the electrodes are to be replaced. Embodiment 2 FIG. 7 is a side cross-sectional view of an energization treatment tank according to a second embodiment. In order to increase the sealing effect, inflatable seals 8 and 8 'are provided in a double manner. In such a case, the type of the working fluid can be changed by setting the piping 10 of the pressure fluid for activating the seal in a separate system on the side close to the steel strip 1 and on the far side, and for example, the pressure on the side close to the steel strip can be changed. It is advantageous for the reasons mentioned above to use the electrolyte itself instead of air.

Although the inflated seals described above are of the fixed outer diameter and the inner diameter expanded type, the technical idea of the present invention can be achieved by using the fixed inner diameter and the outer diameter expanded type in some cases. It does not deviate.

[0020]

According to the present invention, the distance between the electrodes can be arbitrarily changed even in the operating state. Therefore, the distance between the electrodes is increased only when the shape of the steel strip is not good, and the other electrodes are used. In some cases, since the electrode can be treated close to the steel strip, the power consumption efficiency can be improved, and the flow rate of the electrolyte can be increased, so that the quality of the treatment can be improved. Compared to the conventional electrode with fixed electrode position, the number of times of contact with the steel strip electrode is 10% or less, the product yield is improved and the life of the electrode is about three times longer, and the power consumption due to the reduction of the distance between electrodes Has been saved.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of an embodiment of the present invention.

FIG. 2 is a partial plan view in one embodiment of the present invention.

FIG. 3 is a partial cross-sectional view of the vicinity of an inflatable seal according to the embodiment of the present invention.

FIG. 4 is a partial cross-sectional view of the vicinity of an inflatable seal according to the embodiment of the present invention.

FIG. 5 is a partial cross-sectional view in one embodiment of the present invention.

FIG. 6 is a partial cross-sectional view in one embodiment of the present invention.

FIG. 7 is a partial sectional view of another embodiment of the present invention.

FIG. 8 is a cross-sectional view of an energization processing tank according to a conventional technique.

FIG. 9 is a cross-sectional view of an energization processing tank according to another conventional technique.

FIG. 10 is a cross-sectional view of an energization processing tank in still another conventional technique.

FIG. 11 is a partially enlarged cross-sectional view of an inflatable seal portion according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel strip 2 Electricity roll 4 Electricity treatment tank 41 Seal groove 5 Electrode adjustment mechanism 6 Electrode holding plate 7 Electrode plate 8 Seal member (inflate seal, tube) 81 Lip part 82 Base 10 Pressure fluid piping 11 Electrolyte supply pipe 12 Conductor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-104797 (JP, A) JP-A-3-25564 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C25D 7/06

Claims (1)

(57) [Claims] 1. A steel strip energization treatment facility comprising: an energization treatment tank in which an opening corresponding to the shape of an electrode plate is formed; and an electrode plate which is mounted in said opening so that the distance from the steel strip can be adjusted. In the gap between the opening and the peripheral edge of the electrode plate, the outer or inner peripheral sealing portion of the tubular sealing member that expands and contracts depending on the magnitude of the internal pressure, an edge-shaped portion having a line contact portion. An electrode sealing device for an electrolytic treatment tank, comprising an elastic lip portion.