JP7302257B2 - Insulated hook and overhead crane for electrolytic refining equipment using it - Google Patents

Description

The present invention relates to an insulating hook and an overhead crane for electrorefining equipment using the same.

Electrolytic refining is generally adopted for refining metals such as copper, nickel and zinc. In this electrolytic refining, an anode plate made of crude metal and a cathode plate for depositing the electrolyzed metal are immersed in an electrolytic bath containing an electrolytic solution and the like, and current is passed through them, whereby electrolysis is performed. An operation is carried out in which a metal having a high purity is deposited on the surface of the cathode plate. In addition, in an electrolytic refining facility in which a large number of electrolytic cells are arranged side by side, an overhead crane is installed for efficiently moving the electrode plates (anode plate, cathode plate) into and out of a large number of electrolytic cells (Patent Document 1).

Most of the overhead cranes, including metal guide rails suspended on the building frame near the ceiling of facilities including the building, are made of metal members. In the electrolytic refining facility using such an overhead crane, in order to prevent the ground fault of the electricity remaining in the electrode plate and to ensure the safety of the workers and the equipment itself in the equipment, the electrode plate is attached to the overhead crane. It is essential to dispose an insulator having sufficient insulating properties somewhere between the end of the bottom side (hook side) to be pulled up and the metal guide rail.

Insulated hooks are widely used in overhead cranes in order to ensure the above insulation. An insulating hook is, for example, a hook in which an insulator made of porcelain or the like is arranged between a structural portion on the upper side (ceiling side) and a structural portion on the lower side (floor surface side) (see Patent Document 2). ).

In fact, in many electrolytic refining facilities, an insulating hook having an insulating material such as polyvinyl chloride (PVC) disposed in the intermediate layer is installed on the overhead crane. However, when used in a high-humidity environment inside an electrolytic refining facility, the insulation deterioration and corrosion of each structural part of the insulating hook progresses exceptionally quickly, and the insulating hook must be disassembled and repaired or replaced at regular intervals. rice field.

JP 2010-236050 A JP-A-6-345385

An object of the present invention is to improve the durability of insulating hooks used in overhead cranes for electrolytic refining equipment.

The present inventors have solved the above problems by providing an insulating hook having an insulating structure composed of an intermediate insulating plate, an insulating washer, and an insulating sleeve, which are made of phenolic resin containing a reinforcing base material. The inventors have found that it is possible to do so, and have completed the present invention. Specifically, the present invention provides the following.

(1) An insulating hook comprising an intermediate insulating plate sandwiched between a metal crane-side base and a metal hook-side base, wherein the crane-side base and the hook-side base are both A flange is formed at the end on the side of the intermediate insulating plate, and the crane-side base, the intermediate insulating plate, and the hook-side base are connected to the flange of the crane-side base, the intermediate insulating plate, and the hook. It is fastened by a bolt passing through the flange of the side base and a nut, and the contact surface between the head of the bolt or the nut and the flange of the crane side base, and the head of the bolt or the nut and an insulating washer is arranged on the contact surface of the flange of the hook-side substrate, and a cylindrical insulating sleeve is arranged on the side surface of the shaft portion of the bolt to cover the entire circumference of the side surface. The intermediate insulating plate and the insulating washer are mainly made of a cloth-based phenolic resin containing a reinforcing base material, and the insulating sleeve is mainly made of a phenolic resin containing no reinforcing base material or the cloth-based phenolic resin. material, insulated hook.

According to the invention of (1), the insulating hook used for the overhead crane for electrolytic refining equipment is formed of a cloth base phenolic resin, which is an engineering plastic material that contains a reinforced base and has high insulation and mechanical strength. It is possible to improve the durability of the insulating structure by providing an insulating structure composed of an intermediate insulating plate and an insulating washer, and an insulating sleeve made of a phenolic resin having high insulating properties. .

(2) The insulating hook according to (1), wherein the insulating sleeve is made of phenolic resin containing no reinforcing base material.

According to the invention (2), in constructing a unique insulating structure, the cloth-based phenolic resin containing the expensive reinforcing base material is used only in the portions requiring special mechanical strength. As a result, the manufacturing cost can be suppressed while maintaining various performances related to insulation and durability of the invention (1).

(3) The entire surface of the insulating joint, which is a joint structure between the crane-side base and the hook-side base, which is constituted by the flange of the crane-side base, the intermediate insulating plate, and the flange of the hook-side base, The insulating hook according to (1) or (2), which is covered with a moisture-proof resin material.

According to the invention of (3), it is possible to prevent moisture from entering the periphery of the intermediate insulating plate and moisture from adhering to the bolts and nuts, thereby maintaining the excellent insulating properties of the insulating hooks for a longer period of time. In addition, even if the insulation deteriorates due to the adhesion of water droplets to the surface of the insulating joint, it can be easily removed by a simple wiping operation to restore the insulation. As a result, it is possible to greatly extend the period at which the insulating hook needs to be disassembled and maintained.

(4) The insulating hook according to (3), wherein the moisture-proof resin material is an epoxy resin.

According to the invention of (4), it is possible to easily perform the work related to the coating of the moisture-proof resin material in the electrolytic refining equipment while exhibiting excellent moisture-proofness.

(5) A metal guide rail, a metal crane base equipped with metal wheels capable of running on the guide rail, a suspension wire suspended from the crane base, and a lower end of the suspension wire. a hook connected to a part, wherein the hook is the insulated hook according to any one of (1) to (4).

According to the invention of (5), the efficiency of maintenance work of an overhead crane for electrolytic refining equipment can be improved by enjoying the above-mentioned effects of the insulating hooks of (1) to (4).

ADVANTAGE OF THE INVENTION According to this invention, durability of the insulation hook used for the overhead crane for electrolytic refining facilities can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows simply the whole structure of the overhead crane for electrolytic refining facilities which can use the insulation hook of this invention preferably. 1 is an exploded perspective view of a joint structure for insulating hooks according to the present invention; FIG. FIG. 2 is a side view of the joint structure of the insulating hook of the present invention (preferred embodiment having a moisture-proof resin portion). FIG. 4 is a partially enlarged cross-sectional view of the joint structure of the insulating hook of the present invention;

Hereinafter, embodiments of the present invention will be described with appropriate reference to the drawings.

<Insulation hook>
As shown in FIG. 1, the insulating hook 14 of the present invention is a member that constitutes the hook portion of the overhead crane 1 that moves the electrode plate 21 into and out of the electrolytic bath 2 in the electrolytic refining equipment 10 . The insulating hook 14 is not particularly limited in its outer shape as long as it has a hook portion 145 capable of detachably suspending the electrode suspension frame 15 capable of simultaneously suspending a large number of electrode plates 21 .

(overall structure)
As shown in FIG. 2, the insulating hook 14 is formed by laminating a crane-side base 141 connected to the upper structure of the overhead crane, an intermediate insulating plate 146, and a hook-side base 143 having a hook portion 145 in this order. Configure the structure as a required structure.

The crane-side substrate 141, the intermediate insulating plate 146, and the hook-side substrate 143, which constitute the insulating hook 14, have the intermediate insulating plate 146 between flange-like flanges 142 and 144 formed at the ends of both substrates. Coupled in a sandwiched configuration. In this arrangement state, the crane-side base 141, the intermediate insulating plate 146, and the hook-side base 143 are integrated by fastening with bolts 147 and nuts 148. As shown in FIG. In this state, the bolt 147 passes through the flange 142, the intermediate insulating plate 146, and the flange 144 and is screwed with the nut 148 to fasten the members with sufficient strength.

In addition, as shown in FIG. 3, the insulating hook 14 is a joint portion between the crane-side base 141 and the hook-side base 143, and is an insulating joint composed of a flange 142, an intermediate insulating plate 146, and a flange 144. More preferably, the entire surfaces of the insulating joints (flange 142, intermediate insulating plate 146, flange 144) are covered with a moisture-proof resin material. In this specification, the covering structure portion formed of the moisture-proof resin material is referred to as a moisture-proof resin portion (moisture-proof resin portion 152).

(crane side base, hook side base)
Both the crane-side base 141 and the hook-side base 143 are metal members. As shown in FIGS. 2 and 3, a flange 142 is formed at one end of a crane-side base 141 that constitutes the insulating hook 14 . Similarly, a brim-shaped flange 144 is formed at the end of the hook-side substrate 143 .

(intermediate insulating plate)
The intermediate insulating plate 146 is a plate-like insulating member made mainly of "fabric-based phenolic resin," which is an insulating material that has sufficient insulation, excellent compressive strength, and excellent durability. . As the fabric-based phenolic resin, a member generally called "cloth-filled bakelite" can be used. The term "fabric-containing Bakelite" refers to a Bakelite-based resin material containing Bakelite as a base resin and cloth as a reinforcing substrate. Bakelite is a trade name and the generic name is polyoxybenzylmethylene glycol anhydride. An intermediate insulating plate 146 provides insulation between flanges 142 and 144 .

(insulating washer)
In the insulating hook 14, as shown in FIGS. 2 and 4, an insulating washer 150, a 151 are arranged. Each of the insulating washers 150 and 151 insulates between the head of the bolt 147 and the surface of the flange 142 and the surface of the nut 148 and the flange 144 . These insulating washers 150 and 151 are doughnut-shaped washers formed using the above-described "fabric-based phenolic resin" as a main material.

(insulating sleeve)
In the insulating hook 14, as shown in FIGS. 2 and 4, a cylindrical insulating sleeve 149 covering the entire side surface of the shaft portion of the bolt 147 is arranged. As shown in FIG. 4, the insulating sleeve 149 preferably covers the entire side surface of the shaft except for the portions covered with the insulating washers 150 and 151 .

The insulating sleeve 149 is a cylindrical sleeve made mainly of the above-described "fabric-based phenolic resin" or phenolic resin that does not contain a reinforcing base material. As used herein, the term "phenolic resin" simply refers to a phenolic resin that does not contain a reinforcing substrate within the base resin.

Here, the intermediate insulating plate 146 and insulating washers 150 and 151 are required to have a suitable compressive strength in order to ensure sufficient tightening force by the bolt 147 and nut 148 . Conversely, it is required to have sufficient compressive strength and breaking strength to prevent deformation or cracking even if a sufficient tightening force is applied. However, the insulating sleeve 149 does not necessarily need to have the same strength. Therefore, there is no need to use expensive "fabric phenolic resin" for this part, and by using a sleeve made of phenolic resin that does not contain a reinforced base material, it is possible to manufacture while maintaining insulation and durability. You can keep costs down. Insulating sleeves 149 provide insulation between flange 142 and bolt 147 and between flange 144 and bolt 147, respectively.

(moisture-proof resin part)
The moisture-proof resin portion 152 covering the insulating joint portion between the crane-side base 141 and the hook-side base 143 is preferably formed, for example, in a substantially ellipsoidal shape as shown in FIG. Moreover, it is preferable to form it with a thermosetting resin having heat resistance. Thermosetting resins that can be preferably used include epoxy resins having a heat resistance temperature of 150°C to 200°C. The moisture-proof resin portion 152 can be formed by applying such a material resin to the entire surface of the insulating joint and curing it.

The outer shape of the moisture-proof resin portion 152 is not particularly limited as long as it can cover the entire surface of the insulating joint portion. However, it is preferable that the surface has a substantially elliptical spherical shape, as described above, so that water droplets on the surface can easily run off, and even if water droplets adhere, they can be easily wiped off.

As an epoxy-based moisture-proof resin material, for example, Scotchcast TM Resin No. 2, a commonly available two-liquid room-temperature curing type manufactured by Sumitomo 3M Co., Ltd., is used. 4 can be used. The "cloth-filled Bakelite" used for the intermediate insulating plate 146 and the insulating washers 150 and 151 is a material with excellent insulating properties and high mechanical strength, but has the disadvantage that the cut surfaces of the laminated plates are particularly susceptible to moisture absorption. . Therefore, by forming the moisture-proof resin portion 152, the durability of the insulating hook can be further improved.

(Insulation structure)
In the insulating hook 14 configured as described above, the insulation between the crane-side base 141 and the hook-side base 143 is maintained by the intermediate insulating plate 146 . Further, when installed on an overhead crane used in the electrolytic refining equipment 10, the joint strength between the crane-side substrate 141 and the hook-side substrate 143 is usually required to withstand a load of about 1500 to 2000 kg. Therefore, strong fastening with a plurality of bolts 147 and nuts 148 is essential. An insulating sleeve 149 and insulating washers 150 and 151 are appropriately arranged around the bolt 147 and nut 148 to prevent conduction through the bolt 147 passing through the intermediate insulating plate 146. .

As described above, the intermediate insulating plate 146 and the insulating washers 150 and 151 are required to have sufficient compressive strength to withstand the strong tightening force of the bolts 147 and nuts 148 in addition to sufficient insulating properties. On the other hand, the insulating sleeve 149 is required only to provide insulation between the flange 142 and the bolt 147 and between the flange 144 and the bolt 147, respectively. Therefore, regarding the positional relationship between the insulating washers 150 and 151 and the insulating sleeve 149, as shown in FIG. It is preferable to provide a structure in which a slight gap is provided between the sleeves 149 so that the insulating washer 151 is not loaded.

<Overhead crane for electrorefining equipment>
By using the insulating hook 14 described in detail above, it is possible to configure the overhead crane 1 for electrorefining equipment that is excellent in safety and efficiency in maintenance work.

The overhead crane for electrorefining equipment of the present invention can have, for example, the configuration shown in FIG. In the overhead crane 1 for electrolytic refining equipment shown in FIG. 1, a metal crane base 12 having metal wheels 121 can travel in the front-rear direction (g direction, b direction) on metal guide rails 11. is installed in

Also, the crane base 12 has a sufficient length in the depth direction on the drawing, and only the portion including the hoisting motor 122 from which the suspension wire 13 hangs down extends in the length direction, that is, as a guide rail. It can be a structure that can be moved independently in orthogonal directions. In many electrolytic refining facilities, a large number of electrolytic cells 2 are arranged in a grid pattern in both vertical and horizontal directions. It can be done efficiently by the crane 1.

The insulating hook 14 is connected to the lower end of the hanging wire 13 and is movable in the vertical direction (u direction, d direction) by the hoisting motor 122 . In addition, the electrode suspension frame 15 is held by the four suspension wires 13 via the insulating hooks 14, and by moving the electrode suspension frame 15 up and down, a large number of electrode plates 21 can be moved in and out of the electrolytic cell 2 once. can be done.

1 Overhead Crane 11 Guide Rail 12 Crane Base 121 Metal Wheel 122 Hoisting Motor 2 Electrolyzer 21 Electrode Plate 13 Hanging Wire 14 Insulating Hook 141 Crane Side Substrate 142 Flange 143 Hook Side Substrate 144 Flange 145 Hook Part 146 Intermediate Insulating Plate 147 Bolt 148 Nut 149 Insulating sleeve 150, 151 Insulating washer 152 Moisture-proof resin part 15 Electrode suspension frame 10 Electrolytic refining equipment

Claims (5)

An insulating hook in which an intermediate insulating plate is sandwiched between a metal crane-side base and a metal hook-side base,
Both the crane-side base body and the hook-side base body have flanges formed at their ends on the side of the intermediate insulating plate,
The crane-side base, the intermediate insulating plate, and the hook-side base are fastened together by bolts and nuts passing through the flanges of the crane-side base, the intermediate insulating plate, and the hook-side base. and
Insulating washers are arranged on the contact surface between the bolt head or the nut and the flange of the crane-side base and the contact surface between the bolt head or the nut and the hook-side base flange. being
A cylindrical insulating sleeve is arranged on the side surface of the shaft portion of the bolt to cover the entire circumference of the side surface,
The intermediate insulating plate and the insulating washer are mainly made of a cloth-based phenolic resin containing a reinforcing base material,
The insulating sleeve is mainly made of a phenolic resin that does not contain a reinforcing base material or the cloth-based phenolic resin ,
The entire surface of an insulating joint, which is a joint structure between the crane-side base and the hook-side base and is constituted by the flange of the crane-side base, the intermediate insulating plate, and the flange of the hook-side base, is made of a moisture-proof resin material. is covered by
insulated hook. A moisture-proof resin portion covering the insulating joint portion between the crane-side base and the hook-side base is formed in a substantially ellipsoidal shape,
The insulating hook according to claim 1. The insulating hook according to claim 1 or 2, wherein the insulating sleeve is made of phenolic resin containing no reinforcing substrate. 4. The insulating hook according to any one of claims 1 to 3, wherein said moisture-proof resin material is an epoxy resin. metal guide rails,
a metal crane base provided with metal wheels capable of traveling on the guide rail;
a suspension wire suspended from the crane base;
and a hook connected to the lower end of the suspension wire,
The hook is the insulating hook according to any one of claims 1 to 4,
Overhead crane for electrorefining equipment.

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