JP6794691B2 - Electrode holder and electrode unit - Google Patents

Description

The present invention is related to the electrode holder and the electrode unit.

Conventionally, as one of the glass melting methods, a direct energizing heating method is known in which a rod-shaped electrode directly inserted into a melting furnace is energized and the glass in the melting furnace is melted by the Joule heat. The electrode used in this method is held in a state of being inserted into the inner portion of the tubular electrode holder disclosed in Patent Document 1, for example.

Japanese Unexamined Patent Publication No. 2012-229153

By the way, the electrode holder needs to be electrically insulated from the electrode to be held. Therefore, a plurality of holders (spacer members in Patent Document 1) are installed so as to protrude from the inner peripheral surface of the electrode holder body, and each holder cooperates to hold the electrode, thereby causing the electrode and the electrode holder body. Insulation is planned.

On the other hand, when the electrode is inserted into the electrode holder, the electrode may come into contact with the holder and the holder may be damaged. Therefore, if the holding mode of the electrode including the holder is not devised, it is necessary to insert the electrode into the electrode holder very carefully, which is a complicated work.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electrode holder into which an electrode can be inserted smoothly and easily, and an electrode unit using the electrode holder. is there.

The electrode holder that solves the above problems is an electrode holder that inserts and holds a rod-shaped electrode for melting glass, and a part of the electrode holder protrudes from the inner side surface of the tubular electrode holder body to form the inside of the electrode holder body. A holder that comes into contact with the outer surface of the electrode is provided to hold the electrode through which the electrode is inserted, and the holder has a spherical shape and is rotatably assembled to the electrode holder main body.

According to this configuration, the holder of the electrode holder is spherical and rotatably assembled to the electrode holder body. Therefore, when the electrode is inserted into the electrode holder, the impact or friction on the electrode is rotated by itself. Reduce. This allows the electrodes to be smoothly and easily inserted into the electrode holder.

In the electrode holder, the holder is made of an insulating material.
According to this configuration, since the holder itself in direct contact with the electrode is composed of an insulator, electrical insulation between the electrode and the electrode holder is achieved without a special insulating structure around the holder. be able to.

In the electrode holder, a plurality of the holders are arranged at predetermined intervals in the circumferential direction of the electrodes, and at least two rows or more are arranged at positions separated in the axial direction of the electrodes.
According to this configuration, a plurality of holders arranged at predetermined intervals in the circumferential direction of the electrodes are arranged at least two rows or more at positions separated in the axial direction of the electrodes, so that the electrodes are arranged in a row rather than in a single row. It can contribute to tilt suppression. Further, as will be described later, when the holder is combined with the mode of accommodating the holder in the accommodating hole, if the retainer is arranged in two or more rows, the accommodating holes are also arranged in two or more rows. Can also be suppressed.

In the electrode holder, a storage hole for accommodating the holder is formed through the electrode holder body in the radial direction, and the holder cannot be pulled out from the radial inner opening of the storage hole. The holder is assembled by fitting a fitting member which is formed into an opening shape and comes into contact with the holder in a housed state in the storage hole.

According to this configuration, since the holder is housed in the housing hole of the electrode holder body and assembled by fitting the fitting member, the holder can be assembled with a simple structure using the storage hole and the fitting member. ..

In the electrode holder, the holder is provided at the end of the electrode holder on the melting furnace side in a state where the electrode holder is assembled to the melting furnace.
According to this configuration, the holder is provided at the end of the electrode holder on the melting furnace side, that is, at the end of the melting furnace side, which is the back side of inserting the electrode, so that the electrode insertion work is facilitated. Can be done.

The electrode unit that solves the above problems is held by inserting the electrode through the electrode holder.
According to this configuration, the electrode can be provided as an electrode unit having an electrode holder that can be smoothly and easily inserted.

According to the electrode holder and the electrode unit of the present invention, the electrode can be smoothly and easily inserted into the electrode holder.

The cross-sectional view which shows the whole of the electrode unit (electrode holder) of an embodiment. An enlarged cross-sectional view of a part of an electrode unit (electrode holder) having the same shape.

Hereinafter, an embodiment of the electrode unit (electrode holder) will be described.
As shown in FIG. 1, the electrode unit 10 of the present embodiment includes an electrode 11 and an electrode holder 12 that holds the electrode 11. The electrode unit 10 is supported by inserting the tip of the electrode holder 12 into a through hole 31a penetrating, for example, the bottom wall 31 of the wall portion of the melting furnace 30.

The electrode 11 is made of molybdenum (conductive metal) and has a circular rod shape. The electrode 11 is held by the electrode holder 12 so that the tip end portion is exposed in the melting furnace 30 for a predetermined length. The base end portion of the electrode 11 is connected to an external power source (not shown) and receives power supply for its own heating. Then, the electrode 11 directly heats the glass G in the melting furnace 30 by heating itself (tip portion) by feeding power.

The electrode holder 12 is made of metal and has a cylindrical shape. The tip portion of the electrode holder 12 is inserted into the through hole 31a of the bottom wall 31 of the melting furnace 30 as the tip insertion portion 12a so that the tip end surface of the tip insertion portion 12a is substantially flush with the inner surface of the bottom wall 31. The electrode holder 12 is installed. In this case, the electrode holder 12 has a flange portion 13 provided on the outer peripheral surface near the base end thereof attached to a mounting portion 32 provided on the bottom wall 31 of the melting furnace 30 by a mounting bolt (not shown) or the like. As a result, it is fixed to the melting furnace 30.

In the tip insertion portion 12a of the electrode holder 12, about 1/4 portion close to the melting furnace 30 is a solid portion 14, and the remaining about 3/4 portion far from the melting furnace 30 is a hollow portion 15.
The hollow portion 15 of the tip insertion portion 12a is provided with an annular flow path 15a that forms an annular shape along the circumferential direction in the peripheral wall 12b constituting the cylindrical electrode holder 12. An annular flow path 15a is closed at the non-insertion side portion of the hollow portion 15, and a pair of water inlet pipe 16a and water outlet pipe 16b are connected to each other. The water inlet pipe 16a and the water outlet pipe 16b are arranged so as to be covered with an outer wall 12c extending from the peripheral wall 12b in a direction away from the melting furnace 30, one end communicating with the annular flow path 15a and the other end being an electrode. It extends to the outside of the holder 12. Then, cooling water is introduced from an external cooling device (not shown) into the annular flow path 15a through the water inlet pipe 16a, and is cooled so as to surround the electrode 11 arranged inside the electrode holder 12. The cooling water introduced into the annular flow path 15a is discharged to the outside through the water discharge pipe 16b.

As shown in FIG. 2, the solid portion 14 of the tip insertion portion 12a is configured with a holding structure 17 for holding the portion near the tip of the electrode 11. The holding structure 17 of the present embodiment has two rows of first and second holding portions 17a and 17b at predetermined intervals in the axial direction. The first and second holding portions 17a and 17b are provided at, for example, 3 or 4 locations at equal intervals in the circumferential direction, for a total of 6 or 8 locations, and are arranged so as to be staggered in the circumferential direction, that is, adjacent first holding portions. The second holding portion 17b is arranged so as to be located between the portions 17a. Each of the holding portions 17a and 17b has the same configuration and accommodates the holding tool 19 in the accommodating hole 18 formed through the solid portion 14 of the tip insertion portion 12a in the radial direction, and the retainer 19 is accommodated in the accommodating hole 18. The supporting screw 20 (fitting member) for positioning is screwed into the accommodating hole 18.

The holder 19 has a spherical shape made of recrystallized alumina and abuts on the outer peripheral surface of the electrode 11. On the other hand, the accommodation hole 18 provided on the main body side of the electrode holder 12 can accommodate the holder 19, and the radial inner opening 18a is smaller than the holder 19, that is, a part of the holder 19 is the electrode holder 12. Although it can protrude from the inner peripheral surface 12d of the (electrode holder 12 main body), it is formed so as not to come out in the radial direction. Further, a thread is formed on the inner peripheral surface of the accommodating hole 18. Then, the support screw 20 is screwed into the accommodating hole 18 from the outside in the radial direction while the retainer 19 is accommodated. At this time, the support screw 20 is screwed in until a part of the holder 19 protrudes from the inner peripheral surface 12d of the electrode holder 12, and is screwed in until the holder 19 can rotate in the accommodating hole 18. ing.

In such a holding structure 17 (first and second holding portions 17a, 17b), a plurality of holding tools 19 abut on a portion near the tip of the electrode 11, and the plurality of holding tools 19 cooperate with each other to hold the electrode 11. keeping. By holding the electrode 11 with the holder 19 in this way, a gap of about several mm is formed between the electrode 11 and the electrode holder 12, so that the electrode 11 and the electrode holder 12 are insulated from each other. Is planned. Further, since the holder 19 itself is an insulating material, it is insulated from each other even when it is in contact with the outer peripheral surface of the electrode 11.

A cylindrical base end side holding member 21 made of an insulating material is attached to the base end side of the electrode holder 12. The proximal end side holding member 21 holds the proximal end side portion of the electrode 11, and also inserts and holds the water inlet pipe 16a and the water outlet pipe 16b.

In the electrode unit 10 having such a configuration, the electrode 11 is attached to the electrode holder 12 fixed to the melting furnace 30 on the base end side (anti-melting furnace 30) at the time of initial installation or when adding the electrode 11 consumed during operation. The insertion is done from the side). The electrode 11 is inserted from the base end side (anti-melting furnace 30 side) of the electrode holder 12. At that time, although the holder 19 protrudes from the inner peripheral surface 12d on the tip side of the electrode holder 12, the spherical holder 19 rotates when the electrode 11 collides or slides, and causes impact, friction, or the like by itself. It reduces and contributes to the smooth and easy insertion of the electrode 11 into the electrode holder 12.

Next, the characteristic effects of this embodiment will be described.
(1) Since the holder 19 of the electrode holder 12 is spherical and rotatably assembled to the main body of the electrode holder 12 (the solid portion 14 of the tip insertion portion 12a), the electrode is inserted when the electrode 11 is inserted into the electrode holder 12. The impact and friction on the 11 are reduced by rotating by themselves. As a result, the electrode 11 can be smoothly and easily inserted into the electrode holder 12. In addition, the holder 19 itself is less likely to be damaged.

(2) Since the holder 19 itself in direct contact with the electrode 11 is composed of recrystallized alumina which is an insulator, there is no need to have a special insulating structure around the holder 19 between the electrode 11 and the electrode holder 12. It is possible to achieve electrical insulation.

(3) Since a plurality of holders 19 of the present embodiment arranged at equal intervals in the circumferential direction of the electrodes 11 are arranged in two rows at positions separated from each other in the axial direction of the electrodes 11, they are arranged in two rows rather than in a single row. It can contribute to suppressing the inclination of the electrode 11. Further, in the case of the present embodiment in which the holder 19 is accommodated in the accommodating hole 18, it is possible to suppress a decrease in the rigidity of the electrode holder 12 main body (the solid portion 14 of the tip insertion portion 12a) due to the formation of the accommodating hole 18. ..

(4) Since the holder 19 is housed in the housing hole 18 of the electrode holder 12 main body and is assembled by screwing the support screw 20, the holder 19 is assembled with a simple structure using the housing hole 18 and the support screw 20. be able to. The support structure of the holder 19 is not limited to the above, and instead of the support screw 20, a member such as a hole filling cap may be fitted into the accommodating hole 18 to assemble the holder 19.

(5) Since the holder 19 is provided at the full portion 14 of the tip insertion portion 12a of the electrode holder 12, that is, at the end portion on the melting furnace 30 side which is the insertion back side of the electrode 11, the electrode 11 insertion work is performed. It can be easy.

The above embodiment may be changed as follows.
-In the above embodiment, the electrode 11 is made of molybdenum, but the material of the electrode 11 is not limited to this.

-In the above embodiment, the holder 19 is made of recrystallized alumina which is an insulating material, but other insulating materials may be used. Further, a conductive material may be used for the holder 19, and in this case, the holder 19 may have an insulating structure.

-In the above embodiment, the holding portions 17a and 17b (holding tools 19) are provided at 6 or 8 locations at equal intervals in the circumferential direction and arranged in two rows in the axial direction, but the number is increased / decreased, even or odd, and unequal intervals. It can be changed as appropriate, such as the arrangement of one row or three or more rows.

-In the above embodiment, the electrode unit 10 is arranged on the bottom wall 31 of the melting furnace 30, but may be arranged on the side wall or the upper wall of the melting furnace 30.

10 ... Electrode unit, 11 ... Electrode, 12 ... Electrode holder, 14 ... Full part (end), 12d ... Inner peripheral surface (inner side surface), 18 ... Storage hole, 18a ... Radial inner opening, 19 ... Holder, 20 ... Support screw (fitting member), 30 ... Melting furnace.

Claims (6)

An electrode holder that is used by inserting and holding a rod-shaped electrode for melting glass and assembling it to the bottom wall of a melting furnace that melts glass .
A holder is provided which a part of the electrode holder body protrudes from the inner surface of the tubular electrode holder body and comes into contact with the outer surface of the electrode to hold the electrode inserted inside the electrode holder body.
The holder has a spherical shape and is rotatably assembled to the electrode holder body .
An electrode holder characterized in that a plurality of the holders are arranged at predetermined intervals in the circumferential direction of the electrodes, and two or more rows are arranged at positions separated in the axial direction of the electrodes. The electrode holder according to claim 1, wherein the holder is made of an insulating material. The electrode holder according to claim 1 or 2, wherein the plurality of holders are arranged so as to be positioned so as not to overlap each other when viewed from the axial direction of the electrodes. In the electrode holder body, a storage hole for accommodating the holder is formed through in the radial direction, and is formed in an opening shape such that the holder cannot be pulled out from the radial inner opening of the storage hole. According to any one of claims 1 to 3, the holder is assembled by fitting a fitting member that comes into contact with the holder in a housed state in the storage hole. Described electrode holder. In the state where the electrode holder is assembled in the melting furnace,
The electrode holder according to any one of claims 1 to 4, wherein the holder is provided at an end portion of the electrode holder on the melting furnace side. An electrode unit according to any one of claims 1 to 5, wherein the electrode is inserted and held in the electrode holder.

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