JP4160691B2 - Electroporation method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrolytic drilling method and apparatus for enabling drilling processing work without vibration when an operation switch, instruments, etc. are subsequently attached to an existing control panel of a thermal power plant or various plants.
[0002]
[Prior art]
Conventionally, in a thermal power plant, there are cases where operation switches and instruments are later installed in an empty space such as an existing control panel as equipment is expanded or improved.
For this purpose, a mounting hole is manually drilled in an existing control panel by a drill, a gold saw or the like.
[0003]
[Problems to be solved by the invention]
However, there is a risk that the instruments may malfunction due to vibrations generated during the drilling operation. Therefore, in this type of drilling operation, the operation of the adjacent unit linked to the control panel is stopped for safety reasons. I have decided.
[0004]
As a matter of course, when the operation of the adjacent unit is stopped until the completion of the operation in accordance with the drilling operation, the plant operation rate is lowered, and the cost loss due to the safety stop is large.
[0005]
By the way, recently, a drilling and cutting device that enables drilling by using an air plasma device has been developed. However, since the device is extremely expensive, the cost of drilling is high, It will not be commensurate with the profitability in the case of applying to scale construction, for example, drilling for attaching units such as switches and lamps of about 2 to 3 stations.
[0006]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method and an apparatus for easily and reliably perforating a free space in an existing control panel without vibration without stopping adjacent units for safety .
[0007]
[Means for Solving the Problems]
To achieve the above object, the invention of claim 1, a method of drilling in an empty space of the work metal plate device is mounted, the drilling shape on the surface of the workpiece metal plate vertical position the anode terminal and fixed adhering the backsheet of electrically insulating the back surface of the workpiece metal plate with adhering the electrically insulating surface sheet in which a slit is formed along, the frame shape surrounding the slit The front surface is closed with a lid provided with a cathode provided opposite to the slit, and the back opening side of the frame is fixed to the top sheet to form an electrolytic cell, and the electrolytic solution is supplied to the electrolytic cell. It is characterized by drilling by supplying from the bottom and energizing the anode and cathode.
[0008]
In the invention of claim 2, in order to perform drilling in the empty space of the workpiece metal plate on which the device is mounted , electrical insulation having a slit along the drilling shape adhered to the surface of the workpiece metal plate in the vertical state and the surface sheet, said backsheet being affixed to the back surface of the work metal plate, the front surface of the frame shape surrounding the slit, closed by a lid body provided with a cathode which is provided so as to face the slit an electrolytic bath formed by attaching a rear opening side of the frame body to the surface sheet as well as formed, the electrolytic solution tank which is connected by a hose to the bottom of the electrolytic bath is fixed to the rear surface of the workpiece metal plate And an anode terminal.
[0009]
In this apparatus, the electrolytic solution tank is arranged on the upper side from the electrolytic cell, and a pipe for draining the contaminated electrolytic solution in the electrolytic cell and an exhaust socket for exhausting the generated gas are provided above the electrolytic cell. (Claim 3). In addition, the cathode is preferably a divided electrode arranged opposite to the slit of the surface sheet with an appropriate gap (Claim 4).
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the unit of the electroporation apparatus S will be described based on a state where it is mounted on a metal control panel P, that is, a metal plate to be processed, which is already installed in a thermal power plant or various plants as shown in FIG.
[0015]
The control panel P targeted for electrolytic drilling in the present invention is attached in a substantially vertical state, and the thickness of the control panel P is about 2 mm when it is thin, and about 6 mm when it is thick. The size of the control panel P is about 2 to 3 m in height, about 2 m in depth, about 1 m in width and about several meters in width, and in the case of a large control panel P As shown in FIG. 1, a door K for entering and exiting the back side of the control panel P is provided on the side.
[0016]
In the exploded perspective view shown in FIG. 2 and the longitudinal sectional view shown in FIG. 4, 1 and 2 are a front sheet and a back sheet made of a synthetic resin film having electrical insulation, and a table of the empty space A of the existing control panel P Adhered and fixed to the back surface in close contact.
Then, the slits 3 having a groove width of about 0.5 to 2 mm and having a groove width of, for example, a rectangular shape or a circular shape are formed on the surface sheet 1 along the hole shape to be punched.
[0017]
D is an electrically insulating synthetic resin electrolytic cell, which is a frame 4 formed in a rectangular frame shape or a circular frame shape by a synthetic resin plate having a thickness of about 2 to 3 mm, and a front outer periphery of the frame body 4 It consists of a transparent synthetic resin lid body 6 fixed to the collar portion 5 so as to cover the front opening of the frame body 4.
Further, the back surface portion of the frame body 4 is formed in the state of the opening 7 and has a frame body size in which the slit 3 is surrounded inside the frame body 4.
[0018]
Reference numeral 8 denotes a carbon electrode functioning as a cathode, which is adhered and fixed to the rear surface of the lid body 6 and in a positional relationship substantially opposite to the slit 3.
For example, when the slit 3 has a rectangular shape, three carbon rods (also referred to as cathode members) having an appropriate length are provided at the upper and lower positions as shown in FIGS. A plurality of divided electrodes U _{1 to} U ₃ and Q _{1 to} Q ₃ and about three divided electrodes L _{1 to} L ₃ and R _{1 to} R ₃ in a rectangular frame shape with a gap C therebetween. Arrange and fix to.
[0019]
And after connecting each lead wire 9 to each divided electrode (carbon rod), it is pulled out from an extraction hole (not shown) formed in the upper part of the electrolytic cell D, and the extraction hole is closed with an epoxy resin. To do.
[0020]
When the slit 3 is circular (not shown), the divided electrodes having a relatively short length are arranged in a substantially circular shape by laying out the polygonal shape in the same manner as described above.
[0021]
Therefore, after applying the epoxy resin agent E as an adhesive to the rear end surface of the frame 4 in the electrolytic cell D opened at the back as described above, the electrolytic cell D is directed toward the control panel P so as to surround the slit 3. By pressing, the frame 4 of the electrolytic cell D is stuck and fixed to the front surface of the top sheet 1 as shown in FIG.
[0022]
Reference numeral 10 denotes an anode terminal, which is fixed to the back surface of the control panel P corresponding to the substantially central portion of the slit 3, but the back sheet 2 covers the anode terminal 10 and adheres almost entirely to the back surface of the control panel P. It is attached when it is stuck and fixed to the state.
11 is a lead wire of the anode terminal 10, and the back sheet 2 and the back surface of the control panel P are extended vertically upward or pulled out from a part of the back sheet 2, and the opening hole 12 is formed with an epoxy resin agent. E is closed.
[0023]
In FIG. 1, G is a power supply device that is connected when energized, and the above-described divided electrodes U _{1 to} U ₃ and Q _{1 to} Q ₃ at the upper and lower positions, and divided electrodes L _{1 to} L ₃ and R _{1 to} R at the left and right positions. _After the lead wires 9 drawn out from ₃ are gathered together on the terminal block B, they are connected to the negative terminal of the power supply device G, and the lead wire 11 is connected to the positive terminal.
[0024]
In FIG. 2 to FIG. 4, reference numeral 13 denotes a liquid injection socket also serving as drainage fixed to a through-hole formed in the bottom plate 4 </ b> A of the frame body 4, to which a supply / drainage hose 14 is connected, and A liquid supply hose 15 is piped between the electrolyte tank T supported at a height position above the mounting position, and a liquid supply and a liquid discharge are provided at the lower end of the liquid supply hose 14 and the terminal end of the liquid supply / drainage hose 14. As shown in FIG. 4, a three-way switching valve V1 for switching between the two is connected, and a drainage hose 16 is connected to the switching valve V1.
[0025]
Further, in the electrolytic solution tank T, as the electrolytic solution W, for example, a solution made of ammonium chloride (NH ₄ Cl) and glycerin, or potassium chloride (KCl) and glycerin is put.
[0026]
Reference numeral 17 denotes an overflow socket fixed to a through hole formed in the upper end of the side plate 4B of the frame body 4, which connects the upper end of the drainage hose 18, and has the lower end positioned below the electrolytic cell D. It passes through the installed drainage tank Y.
Reference numeral 19 denotes an exhaust socket fixed to a through-hole formed in the ceiling plate 4C of the frame body 4, and the ammonia gas generated in the course of the electrolytic treatment is exhausted to the atmosphere as it is, or, if necessary, the outdoor Connect an exhaust hose (not shown) to
[0027]
In addition to the above, an epoxy resin E as a caulking agent is applied to the corner portion of the base outer periphery of the frame 4 of the electrolytic cell D adhered and fixed to the top sheet 1 as shown in FIG. Prevents liquid leakage while reinforcing strength.
Of course, the epoxy resin E is also applied to the outer peripheral portions of the top sheet 1 and the back sheet 2 to prevent liquid leakage.
Thus, the surface of the control panel P exposed from the slit 3 is slowly electrolyzed by connecting the electroporation apparatus S and the power supply apparatus G mounted on the existing metal control panel P and energizing as described above. Provided for processing.
[0029]
When the state of the electrolytic reaction is externally observed from the transparent lid 6, the electrolytic solution gradually changes from transparent to brown as the electrolytic reaction progresses, and further, the electrolysis performance becomes contaminated to black-brown. Will drop.
When the electrolytic performance deteriorates in this way, when the supply valve V2 of the electrolyte tank T is opened and the new electrolyte W is sent to the electrolyte tank D and replenished, the polluted waste liquid in the electrolyte tank D is drained. It is sent from the hose 18 to the drainage tank Y and collected.
In this way, by repeatedly repeating the supply and discharge of the new electrolyte W, the perforating process is performed while the electrolytic processing is efficiently promoted.
[0030]
The reason why the carbon electrode 8 is composed of the divided electrodes U _{1 to} U ₃ , Q _{1 to} Q ₃ , L _{1 to} L ₃ , and R _{1 to} R ₃ is that the above-described electrolytic reaction does not necessarily proceed evenly in the vertical and horizontal directions. In some cases, a current and voltage control circuit (not shown) is incorporated in each output circuit from each lead wire 9, and the divided electrodes U ₁ to U ₁ are arranged depending on whether the electrolytic reaction is relatively fast or slow. Because it was possible to control each of U ₃ , Q _{1 to} Q ₃ , L _{1 to} L ₃ , and R _{1 to} R _3, it was considered to deal with uniform electrolytic treatment as a countermeasure for reaction spots in electrolytic treatment. is there.
[0031]
In the above case, one electrolytic cell D mounted on the control panel P and its supply / drainage system have been described. In FIG. 5, two electrolytic cells D1 and D2 are mounted on the control panel P. The case shows a supply and drainage system.
In the figure, 20 is a branch socket for the electrolyte discharged from the electrolyte tank T, and V3 is a two-way switching valve connected to the liquid supply hoses 15 and 15A to the first electrolytic tank D1 and the second electrolytic tank D2.
Other configurations are the same as those described above, and thus the same reference numerals are given and detailed descriptions thereof are omitted.
[0032]
【The invention's effect】
Since the present invention provides the electroporation method according to claim 1 and the electroporation apparatus according to claims 2 to 4 , switches, lamps, meters, etc. are provided on an existing control panel. In the case of expansion, efficient drilling work can be performed without vibration on the control panel without incurring the safety stop of the equipment attached to it .
[0033]
At this time, an expensive and large-scale processing facility is not required, and the drilling processing operation by a relatively small and compact electrolytic drilling apparatus can be efficiently performed by a simple and simple method and apparatus. Therefore, the processing cost at the time of small-scale construction can be suppressed to a very low level, which is very economical and practical.
[0034]
In addition, the electrolytic solution in the electrolytic solution tank is piped so as to be supplied to the electrolytic cell from the bottom of the frame, the polluted electrolytic solution in the electrolytic cell is drained from the top of the frame, and the generated gas is By exhausting from the upper part of the frame to the outside, the supply / discharge liquid of the electrolyte and the gas exhaust are efficiently performed.
[0035]
In addition, by using a split electrode in which the cathode is opposed to the slit formed in the surface sheet and arranged with an appropriate gap, an equivalent electrolytic perforation treatment can be dealt with as a reaction spot countermeasure for the electrolytic treatment.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an outline of an electroporation apparatus mounted on a control panel.
FIG. 2 is an exploded perspective view of the electroporation apparatus.
FIG. 3 is a perspective view of an electrolytic cell.
FIG. 4 is an enlarged view showing a longitudinal section of FIG. 1;
FIG. 5 is a schematic view showing a supply / drainage system when two electrolytic cells are installed.
[Explanation of symbols]
S electrolytic drilling apparatus P control panel K door A free space D, D1, D2 electrolyzer W electrolyte _{U 1 ~U 3, Q 1 ~Q} 3, L 1 ~L 3, R 1 ~R 3 divided electrodes C gap E Epoxy resin B Terminal block T Electrolyte tank Y Drain tank G Power supply devices V1 to V3 Switching valve 1 Top sheet 2 Back sheet 3 Slit 4 Frame 4A Bottom plate 4B Side plate 4C Ceiling plate 5 Gutter 6 Lid 7 Back opening 8 Cathode (carbon electrode)
9, 11 Lead wire 10 Anode terminal 12 Opening hole 13 Injection socket 14 Supply / drainage hose 15 Supply liquid hose 16, 18 Drainage hose 17 Overflow socket 19 Exhaust socket 20 Branch socket

Claims (4)

A method of drilling in an empty space of a metal plate to be machined with a device , wherein an electrically insulating surface sheet having a slit along the shape of the hole is pasted on the surface of the metal plate to be machined in a vertical state. securing the anode terminal on the back surface of the workpiece metal plate adhered to the back sheet of electrically insulating with the front surface of the frame shape surrounding the slit with a cathode which is provided to face to said slit Closing with a lid and fixing the back opening side of the frame to the top sheet to form an electrolytic cell, supplying electrolyte from the bottom of the electrolytic cell, and energizing the anode and cathode Electrolytic perforation method characterized by drilling. Since the device is drilled in the empty space of the work sheet metal mounted, an electrically insulating surface sheet in which a slit is formed along a perforation shape which is adhered to the surface of the work sheet metal in the vertical state, the target and the backsheet being affixed to the back surface of the machining metal plate, the front surface of the frame shape surrounding the slit, the frame body with closing a lid body provided with a cathode which is provided so as to face the slit comprising an electrolytic bath formed by attaching a rear opening side on the top sheet, and an electrolytic solution tank which is connected by a hose to the bottom of the electrolytic bath, an anode terminal which is fixed to the back surface of the workpiece metal plate, a An electroporation apparatus for performing the electroporation method according to claim 1. The electrolytic solution tank is disposed on the upper side of the electrolytic cell, and includes a pipe for draining the contaminated electrolytic solution of the electrolytic cell and an exhaust socket for exhausting generated gas at the upper part of the electrolytic cell. The electrolytic perforation apparatus according to claim 2, wherein 3. The electroporation apparatus according to claim 2, wherein the cathode is a divided electrode arranged to face the slit of the surface sheet with an appropriate gap.

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