JP2020176005A - Insulation hook, and overhead crane for electrolytic refining facility using the same - Google Patents

Abstract

To improve the durability of an insulation hook used for an overhead crane for electrolytic refining facility.SOLUTION: A crane side base body 141, an intermediate insulating plate 146, and a hook side base body 143 are fastened with a bolt 147 and a nut 148 passing therethrough. Insulation washers 150, 151 are arranged on an abutment surface between a head part of the bolt 147 or the nut 148 and a flange 142 of the crane side base body 141 and an abutment surface between the head part of the bolt 147 or the nut 148 and a flange 144 of the hook side base body 143. A cylindrical insulating sleeve 149 is arranged on a side surface of a shaft part of the bolt 147 to cover a whole circumference of the side surface. The intermediate insulating plate 146 and the insulation washers 150, 151 contain a fabric based material phenol resin including a reinforcing base material as their main constituents. The insulating sleeve 149 serves as an insulation hook 14 including a phenol resin which does not contain a reinforcing base material, or a fabric based material phenol resin as its main constituent.SELECTED DRAWING: Figure 2

Description

The present invention relates to an insulating hook and an overhead crane for an electrolytic refining facility using the same.

Electrorefining is generally used for refining metals such as copper, nickel, and zinc. In this electrolytic refining, an anode plate formed of crude metal and a cathode plate for precipitating electrolyzed metal are electrolyzed by energizing while immersed in an electrolytic cell containing an electrolytic solution or the like. An operation is being carried out in which a highly pure metal is deposited on the surface of the cathode plate. In an electrolytic refining facility in which a large number of electrolytic cells are juxtaposed, an overhead crane is installed to efficiently put the above electrode plates (anode plate, cathode plate) in and out of a large number of electrolytic cells (Patent Documents). 1).

Most of the above-mentioned overhead cranes are made of metal members, including metal guide rails mounted on the building frame near the ceiling of the equipment including the building. In an electrolytic refining facility that uses such an overhead crane, in order to prevent electrical ground faults remaining on the electrode plate and to ensure the safety of workers and the equipment itself in the facility, the electrode plate is used for the overhead crane. It is essential to dispose an insulator having sufficient insulating properties at any position between the end on the lower side (hook side) to be pulled up and the metal guide rail described above.

In order to ensure the above-mentioned insulation properties, it is widely practiced to use an insulating hook in an overhead crane. The 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 in which an insulator such as polyvinyl chloride (PVC) is arranged in an intermediate layer portion is installed in an overhead crane. However, when used in a high-humidity environment in an electrolytic refining facility, the insulation deterioration and corrosion of each structural part of the insulating hook progresses particularly quickly, and the insulating hook must be disassembled, maintained, or replaced at regular intervals. It was.

Japanese Unexamined Patent Publication No. 2010-236050 Japanese Unexamined Patent Publication No. 6-345385

An object of the present invention is to improve the durability of an insulating hook used in an overhead crane for an electrolytic refining facility.

The present inventors have solved the above problems by using an insulating hook having an insulating structure composed of an intermediate insulating plate, an insulating washer, and an insulating sleeve, which is formed of a phenol resin containing a reinforced base material. We have found that we can do this, and have completed the present invention. Specifically, the present invention provides the following.

(1) An insulating hook in which an intermediate insulating plate is sandwiched between a metal crane-side base and a metal hook-side base, and 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 the flange of the crane-side base, the intermediate insulating plate, and the hook. A bolt and a nut that penetrate the flange of the side base are fastened by the head of the bolt or the contact surface between the nut and the flange of the crane side base, and the head of the bolt or the nut. An insulating washer is arranged on the contact surface between the hook and the flange of the hook-side substrate, and a cylindrical insulating sleeve covering the entire circumference of the side surface is arranged on the side surface of the shaft portion of the bolt. The intermediate insulating plate and the insulating washer are mainly made of a cloth-based phenol resin containing a reinforced base material, and the insulating sleeve is mainly made of a phenol resin containing no reinforced base material or the cloth-based phenol resin. Insulation hook as a material.

According to the invention of (1), the insulating hook used for an overhead crane for electrolytic refining equipment is formed of a cloth base material phenol resin which is an engineering plastic material containing a reinforced base material and having high heat insulating properties and mechanical strength. The durability of the insulating structure can be improved by providing an insulating structure composed of an intermediate insulating plate and an insulating washer, and an insulating sleeve formed of a phenol resin having high insulating properties. ..

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

According to the invention of (2), in constructing a unique insulating structure, a cloth-based phenol resin containing an expensive reinforcing substrate is used only in a portion where special mechanical strength is required. As a result, the manufacturing cost can be suppressed while maintaining various performances related to the insulating property and durability of the invention of (1).

(3) The entire surface of the insulating joint portion, which is a joint structure between the crane side base and the hook side base, which is composed of the flange of the crane side base, the intermediate insulating plate, and the flange of the hook side base, is formed. The insulating hook according to (1) or (2), which is coated 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, and to maintain the excellent insulating property of the insulating hook for a longer period of time. Further, even if the insulation is deteriorated 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 insulating property. As a result, the cycle in which the insulating hook needs to be disassembled and maintained can be significantly extended as compared with the conventional case.

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

According to the invention of (4), the work related to the coating of the moisture-proof resin material can be easily carried out in the electrolytic refining facility while exhibiting excellent moisture-proof property.

(5) A metal guide rail, a metal crane base provided with metal wheels capable of traveling on the guide rail, a hanging wire hanging from the crane base, and a lower end of the hanging wire. An overhead crane for an electrolytic refining facility, comprising a hook connected to a portion, wherein the hook is an insulating hook according to any one of (1) to (4).

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

According to the present invention, the durability of an insulating hook used in an overhead crane for an electrolytic refining facility can be improved.

It is a schematic diagram which shows simply the whole structure of the overhead crane for the electrolytic refining facility which can preferably use the insulation hook of this invention. It is an exploded perspective view of the joint structure of the insulating hook of this invention. It is a side view of the joint structure of the insulating hook of the present invention (a preferable embodiment including a moisture-proof resin portion). It is a partially enlarged sectional view of the joint structure of the insulating hook of this invention.

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

<Insulation hook>
As shown in FIG. 1, the insulating hook 14 of the present invention is a member constituting a hook portion of an overhead crane 1 for moving an electrode plate 21 in and out of an electrolytic cell 2 in an electrolytic refining facility 10. The outer shape of the insulating hook 14 is not particularly limited as long as it has a structure having a hook portion 145 capable of detachably suspending an electrode suspension frame 15 capable of suspending a large number of electrode plates 21 at the same time.

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

The crane-side base 141, the intermediate insulating plate 146, and the hook-side base 143 that form the insulating hook 14 have the intermediate insulating plate 146 between the flange-shaped flanges 142 and 144 formed at the ends of both bases. They are combined 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 being fastened by bolts 147 and nuts 148. In this state, the bolt 147 is screwed with the nut 148 while penetrating the flange 142, the intermediate insulating plate 146, and the flange 144, and fastens each of the above members with sufficient strength.

Further, 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 portion composed of the flange 142, the intermediate insulating plate 146, and the flange 144. It is more preferable that the entire surface of the insulating joint (flange 142, intermediate insulating plate 146, flange 144) is covered with a moisture-proof resin material. In this specification, the coating 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-shaped flange 142 is formed at one end of the crane-side base 141 constituting the insulating hook 14. Further, a flange-shaped flange 144 is also formed at the end of the hook-side substrate 143.

(Intermediate insulation plate)
The intermediate insulating plate 146 is a plate-shaped insulating member formed mainly of "cloth base material phenol resin" which is an insulating material having excellent compressive strength and excellent durability in addition to sufficient insulating properties. .. As the cloth-based phenolic resin, a member generally called "bakelite with cloth" can be used. The term "bakelite containing cloth" refers to a bakelite-based resin material containing bakelite as a base resin and cloth as a reinforced base material. Bakelite is a registered trademark and its generic name is polyoxybenzylmethylene glycol ammonium hydride. The intermediate insulating plate 146 insulates between the flange 142 and the flange 144.

(Insulation washer)
In the insulating hook 14, as shown in FIGS. 2 and 4, the insulating washer 150 is placed on the back side of the head of the bolt 147 (the side of the intermediate insulating plate 146) and the back side of the nut 148 (the side of the intermediate insulating plate 146). 151 is arranged. The insulating washers 150 and 151 insulate between the head of the bolt 147 and the surface of the flange 142, and the contact surface of the nut 148 and the surface of the flange 144. The insulating washers 150 and 151 are donut-shaped washers formed by using the above-mentioned "cloth-based phenol resin" as a main material.

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

The insulating sleeve 149 is a cylindrical sleeve formed mainly of the above-mentioned "cloth-based phenol resin" or a phenol resin containing no reinforced base material. In the present specification, the term "phenolic resin" simply refers to a phenolic resin that does not contain a reinforced base material in the base resin.

Here, the intermediate insulating plate 146 and the insulating washers 150 and 151 are required to have appropriate compressive strength in order to make the tightening force of the bolt 147 and the nut 148 sufficient. Conversely, compression strength and fracture strength that do not deform or crack even when a sufficient tightening force is received are required. However, the insulating sleeve 149 does not necessarily need to have the same strength. Therefore, it is not necessary to use an expensive "cloth-based phenolic resin" for this part, and by using a phenolic resin sleeve that does not contain a reinforced base material, it can be manufactured while maintaining insulation and durability. The cost can be suppressed. The insulating sleeve 149 insulates between the flange 142 and the bolt 147 and between the flange 144 and the bolt 147, respectively.

(Moisture-proof resin part)
The moisture-proof resin portion 152 that covers the insulating joint between the crane-side substrate 141 and the hook-side substrate 143 is preferably formed in a substantially ellipsoidal shape as shown in FIG. 3, for example. Further, it is preferably formed of a thermosetting resin having heat resistance. Examples of the thermosetting resin that can be preferably used include epoxy resins having a heat resistant 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 above-mentioned 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 ellipsoidal shape as described above, in which water droplets on the surface easily flow down and can be easily wiped off even when water droplets adhere.

As a moisture-proof resin material of an epoxy resin, for example, a generally sold two-component room temperature curing type Scotchcast TM Resin No. 2 manufactured by Sumitomo 3M Ltd. 4 can be used. "Bakelite with cloth" used for the intermediate insulating plate 146 and the insulating washers 150 and 151 is a material having excellent insulating properties and high mechanical strength, but has a drawback that the cut surface portion of the laminated plate is particularly easy to absorb moisture. .. 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 having the above configuration, the intermediate insulating plate 146 maintains the insulation between the crane-side base 141 and the hook-side base 143. Further, when it is installed and used in an overhead crane used in the electrolytic refining facility 10, the joint strength between the crane side base 141 and the hook side base 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. Around the bolt 147 and the nut 148, the insulating sleeve 149 and the insulating washers 150 and 151 are appropriately arranged to prevent conduction through the bolt 147 penetrating the intermediate insulating plate 146. ..

As described above, the intermediate insulating plates 146 and the insulating washers 150 and 151 are required to have sufficient insulating properties and sufficient compressive strength to withstand the strong tightening force of the bolts 147 and nuts 148. On the other hand, the insulating sleeve 149 is required only to have a function of insulating between the flange 142 and the bolt 147 and between the flange 144 and the bolt 147. Therefore, regarding the positional relationship between the insulating washers 150 and 151 and the insulating sleeve 149, as shown in FIG. 4, it is preferable that the insulating washers 150, the insulating sleeve 149, and the insulating washer 151 are overlapped in this order, and are insulated from the insulating washers 150 and 151. It is preferable that a slight gap is provided between the sleeves 149 so that the insulating washer 151 is not loaded.

<Overhead crane for electrolytic refining equipment>
By using the insulating hook 14 described in detail above, it is possible to configure an overhead crane 1 for an electrolytic refining facility, which is excellent in safety and efficiency of maintenance work.

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

Further, the crane base 12 has a sufficient length in the depth direction on the drawing, and only the portion including the hoisting motor 122 hanging the hanging wire 13 is in the length direction, that is, the guide rail. The structure can be made to be able to move independently in the orthogonal direction. In many electrolytic refining facilities, a large number of electrolytic cells 2 are arranged in a grid pattern in both the vertical and horizontal directions. However, due to the above structure, the work of putting the electrode plates 21 in and out of these large number of electrolytic cells 2 can be performed on the ceiling. This can be done efficiently by the crane 1.

The insulating hook 14 is connected to the lower end of the hanging wire 13 and can be moved in the vertical direction (u direction, d direction) by the winding motor 122. Further, the electrode hanging frame 15 is held by the four hanging wires 13 via the insulating hook 14, and by raising and lowering the electrode hanging frame 15, a large number of electrode plates 21 are taken in and out of the electrolytic cell 2 once. Can be done.

1 Crane for ceiling 11 Guide rail 12 Crane base 121 Metal wheel 122 Hoisting motor 2 Electrolytic tank 21 Electrode plate 13 Suspended wire 14 Insulation hook 141 Crane side base 142 Flange 143 Hook side base 144 Flange 145 Hook part 146 Intermediate insulation plate 147 Bolt 148 Nut 149 Insulation sleeve 150, 151 Insulation washer 152 Moisture-proof resin part 15 Electrode hanging frame 10 Electrolytic purification equipment

Claims (5)

An insulating hook in which an intermediate insulating plate is sandwiched between a metal crane-side substrate and a metal hook-side substrate.
Both the crane-side substrate and the hook-side substrate have a flange formed at the end on the side of the intermediate insulating plate.
The crane-side substrate, the intermediate insulating plate, and the hook-side substrate are fastened by bolts and nuts penetrating the flange of the crane-side substrate, the intermediate insulating plate, and the flange of the hook-side substrate. And
Insulating washers are arranged on the head of the bolt or the contact surface between the nut and the flange of the crane side base, and on the head of the bolt or the contact surface between the nut and the flange of the hook side base. Has been
On the side surface of the shaft portion of the bolt, a cylindrical insulating sleeve covering the entire circumference of the side surface is arranged.
The intermediate insulating plate and the insulating washer are mainly made of a cloth-based phenol resin containing a reinforced base material.
The insulating sleeve is an insulating hook mainly made of a phenol resin containing no reinforced base material or the cloth base material phenol resin. The insulating hook according to claim 1, wherein the insulating sleeve is made of a phenol resin containing no reinforced base material. The entire surface of the insulating joint, which is a joint structure between the crane-side substrate and the hook-side substrate, which is composed of the flange of the crane-side substrate, the intermediate insulating plate, and the flange of the hook-side substrate, is made of a moisture-proof resin material. The insulating hook according to claim 1 or 2, which is covered with. The insulating hook according to claim 3, wherein the moisture-proof resin material is an epoxy resin. With a metallic guide rail
A metal crane base having metal wheels that can run on the guide rail,
The hanging wire hanging from the crane base and
With a hook connected to the lower end of the hanging wire,
The hook is the insulating hook according to any one of claims 1 to 4.
Overhead crane for electrolytic refining equipment.

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