JP3311009B2 - Method and apparatus for correcting and restoring deformation of a cylindrical member such as a reaction vessel for metal production - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reaction vessel for metal production,
For example, the present invention relates to a method and an apparatus for correcting and restoring the deformation of a cylindrical portion of a cylindrical member such as a reaction vessel for metal production manufactured by a reduction method of titanium, niobium, zirconium, hafnium or the like.

[0002]

2. Description of the Related Art Conventionally, as a method for industrially producing metals such as titanium, niobium, zirconium, and hafnium, so-called high-melting-point active metals, a reduction reaction with a dissimilar metal is generally performed. It is well known to do. That is, for example, the method for producing metallic titanium is as follows:
Magnesium reduction is widely used in which titanium chloride is reduced with magnesium to produce titanium metal.

[0003] In the above-mentioned magnesium reduction method of titanium chloride, usually, a reaction vessel composed of a metal-made cylindrical member having a bottom is used, and the reaction vessel is first sealed with a lid member, and the reaction vessel is heated under a required temperature atmosphere. In addition to filling an inert gas and injecting molten magnesium as a reducing agent into the inside, and charging the inside with titanium chloride while keeping the inside of the container at a temperature of about 800 to 900 ° C. And
The reduction reaction is carried out to produce metallic titanium, and then the termination of the reduction reaction is repeated.
While maintaining the temperature at about 00 to 1080 ° C., unreacted magnesium remaining in the container and its chloride are removed by evaporating in vacuum, and after cooling this to room temperature, In general, a process cycle is performed in which the top of the container is opened, the bottom is cut, and the titanium sponge as a product formed inside is extruded from the lower side to the upper side by using a press.

[0004] In this case, in the reaction vessel for performing the magnesium reduction method, the cut bottom is repaired again, and this is repeatedly used. However, during the heating operation for the reduction reaction, A steep vertical temperature gradient on the upper side of the tubular body in the reaction vessel, and during the cooling operation, the tubular body in the reaction vessel corresponding to the upper end of the generated sponge titanium having a large heat capacity. Near the middle stage, a similar steep vertical temperature gradient has occurred,
The stress generated due to the occurrence of each of these steep vertical temperature gradients is accumulated in the wall surface of the cylindrical portion of the cylindrical member, and the stress is reduced and deformed in a direction in which the diameter of the corresponding portion becomes smaller. Inevitable.

[0005] Deformation of a specific portion of the cylindrical portion of the reaction vessel is a major obstacle to the work of taking in and out of a pedestal set therein and the work of pushing out the product titanium sponge. Further, it has been recognized as a serious problem that the reaction vessel cannot be reused and its useful life is remarkably shortened.To solve this point, at present, the deformed portion of the cylindrical body is partially reduced. It is a fact that only very uneconomical measures, such as repairing and updating, are used.

[0006]

Here, with regard to the usual modification of the deformation of a metal member, means for sufficiently applying an external force after sufficiently heating the corresponding deformed portion has been widely adopted. On the other hand, in the case of correcting the deformation of the cylindrical portion of the metal cylindrical member as the above-described reaction vessel, for example, by using a press machine such as a press, the outer side of the cylindrical portion is Means for restoring the deformation of the deformed part to the normal state from the above, or means for locally restoring the deformation of the deformed part to the normal size from the inside side of the cylindrical body using a pressurizing device such as a jack What is known respectively, means for uniformly and easily correcting and restoring the deformed portion narrowed over the entire circumference of the cylindrical portion of the cylindrical member as described above, Not yet known at all, thus The deformation of the reaction vessel due to the metal cylindrical member specified here is also economical, substantial, and cannot perform fundamental correction and restoration. Inevitably, a means for repairing and renewing the deformed portion only partially is inevitable.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem. It is an object of the present invention to uniformly deform a narrowed deformation portion over the entire circumference of a cylindrical body. It is an object of the present invention to provide a method and an apparatus for correcting and restoring the deformation of a cylindrical member such as a reaction vessel for metal production, which can be easily and easily corrected and restored to dimensions.

[0008]

In order to achieve the above object, the present inventors have made various studies to solve the problems left in the above-mentioned prior art, and as a result, have found a relatively simple structure. A means for easily correcting and restoring the deformed portion of the cylindrical member to a uniform desired size over the entire circumference by operation has been found.

That is, a method of correcting and restoring deformation of a cylindrical member according to the present invention is a method of restoring and restoring a narrowed abnormal deformation of a cylindrical portion of a cylindrical member, wherein the cylindrical portion of the cylindrical member is restored. A plurality of correction pieces having an outer circumferential arc surface following the inner diameter after the correction are connected along the circumferential surface, and each correction piece is connected to the hydraulic cylinder to expand radially. Prepare an expansion mechanism configured to be able to diameter, from the upper opening of the cylindrical member preheated to the required temperature in advance, suspend the expansion mechanism in the cylindrical body portion, and hold each of the correction pieces While controlling the diameter expansion by the required amount, the cylinder is operated in the horizontal direction by directly contacting the inner peripheral surface of the cylindrical portion, and the deformed portion in the cylindrical portion is evenly expanded toward the outer peripheral side to correct and restore. It is characterized by the following.

[0010] Further, a deformation correcting and restoring device for a cylindrical member according to the present invention is a device for restoring and restoring the squeezed abnormal deformation of the cylindrical portion of the cylindrical member, wherein the cylindrical portion of the cylindrical member is restored. A plurality of correction pieces having an outer circumferential arc surface following the inner diameter after the correction are connected along the circumferential surface, and each correction piece is connected to the hydraulic cylinder to expand radially. An expansion mechanism that enables a diameter, a fluid pressure control mechanism that supplies a controlled required fluid for the diameter expansion operation to the fluid pressure cylinder, and an operating unit that operates the expansion mechanism vertically in a vertical direction. With the configuration, the expansion mechanism is suspended from the upper opening of the cylindrical member preliminarily heated to a required temperature and held in the cylindrical body portion, and the diameter of each correction piece is controlled by a required amount while controlling the expansion. directly contacting the tubular member inner peripheral surface It is operated in a horizontal direction by, and is characterized in that as capable of modification restoring spread evenly pressed toward the outer peripheral side deformation portion in the cylindrical body portion.

The number of correction pieces including the fluid pressure cylinder in the expansion mechanism according to the present invention, the fluid pressure applied to the fluid pressure cylinder, the degree of expansion, the vertical width of the correction piece, and the length of the outer peripheral arc surface Each of the curvature and the curvature may be appropriately selected in consideration of the size, thickness, degree of deformation, and required restoration accuracy of the cylindrical portion to be corrected and restored. In the state in which the correction pieces are extended to the maximum, that is, in other words, at the position where each correction piece is expanded to the maximum and the diameter thereof is increased, it is made to match as much as possible the inner peripheral surface of the cylindrical body part to be corrected. Strictly, after correcting and restoring the deformed portion of the cylindrical member, elastic deformation of each member so that a predetermined inner peripheral surface shape and an inner diameter dimension can be obtained in a state where the temperature is returned to normal temperature, and Sufficient thermal expansion It is set in consideration of the found desirable for to simplify modification restoring operation.

[0012] The setting of the suspension of the cylindrical member at the center of the cylindrical portion in the expansion mechanism may be performed, for example, by setting an upper opening flange without deformation in the cylindrical portion or an inner wall surface near the flange. Therefore, it is sufficient that the cylinder stroke of the hydraulic cylinder is such that the entire expansion mechanism can be suspended and inserted into the cylinder body in a state where the hydraulic cylinder is reduced to a minimum. .

On the other hand, the extension stroke control in each of the fluid pressure cylinders and the control of each of the correction pieces in the radially expanding direction are performed as described above in a state where each of the correction pieces is maximally extended, and the inside of the cylinder body after the correction is corrected. It is not necessary to consider again when adopting a mode of matching the peripheral surface, but it is also possible to control the stroke and control the degree of restoration by using a limit switch or controlling the fluid pressure. In the case of using a limit switch, it is necessary to consider heat insulation so as to withstand the heat effect at the time of the correction and restoration operation.

Further, the method and the apparatus of the present invention are not limited to merely correcting and restoring the deformation of the cylindrical portion of the cylindrical member as the reaction vessel, but also to the cylindrical member of other similar cylindrical members. The present invention can be effectively applied to the modification and restoration of deformation in the body.

[0015]

Therefore, according to the present invention, when the expansion mechanism is suspended from the upper opening of the cylindrical member preheated to the required temperature in the cylindrical body, the required hydraulic pressure is applied to each hydraulic cylinder. In this case, first, the extension starts at the part where the operating resistance is the smallest, and when the operating resistance increases, that is, when the abnormally deformed part is narrowed down to the inside of the cylindrical body, each correction is made. At the time when the pieces are pressed against each other, the correcting and restoring action of the deformed portion by each of the correcting pieces is started, and the contact pressure area on the deformed portion of the cylindrical portion on the outer circumferential arc surface of each of these correcting pieces, From the relationship with the predetermined fluid pressure applied to each fluid pressure cylinder, a larger correction force is applied to a portion with a large deformation amount and a small contact pressure area to restore the portion preferentially. Is gradually restored. In other words, in other words, the desired restoration balance is automatically adjusted during the correction restoration operation, and thus the restoration can be made uniform or almost uniform.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method and an apparatus for correcting and restoring deformation of a cylindrical member such as a reaction vessel for metal production according to the present invention will be described in detail with reference to FIGS.

FIG. 1 is a vertical sectional side view schematically showing a schematic configuration of a deformation correcting and restoring apparatus for a cylindrical member such as a reaction vessel for metal production to which an embodiment of the present invention is applied.
FIG. 4 is an enlarged plan view schematically showing a half part arrangement of the expansion device in the deformation correction / restoration device.

In each of these figures, a reaction vessel comprising a cylindrical member, that is, a metal cylindrical member used in the magnesium reduction method of titanium chloride in this embodiment (hereinafter, simply referred to as a reaction vessel). ) 1 is formed in a cylindrical shape with a bottom having a flange portion 3 above the opening of the cylindrical body portion 2, and as a result of being used continuously as described above, the cylindrical body portion 2 An abnormally deformed portion 4 narrowed in the direction of decreasing the diameter is formed on the upper side and near the middle step. Then, the reaction vessel 1 is charged from above into a heating furnace 5 used for the magnesium reduction method of titanium chloride, and the inside of the heating furnace 5 is close to the inner peripheral surface for heating. And a temperature sensor 7 for controlling the heating temperature is desired.

The expansion mechanism 11 constituting the apparatus of this embodiment is fixed on the base plate 13 provided at the lower end of the support cylinder 12 so as to be connected to each other along the circumferential direction. A plurality of hydraulic cylinders capable of operating a plunger in a radial direction. The hydraulic cylinder has a plurality of hydraulic cylinders 14 using water pressure in order to avoid dangers such as fire and explosion. , The respective hydraulic cylinders 14
Is connected in common with a hydraulic pressure supply pipe 15 for supplying water pressure from an external hydraulic pressure source through the support cylinder 12, and separately supplies cooling water to the necessary parts with respect to the support cylinder 12. The cooling water supply pipe 16 to be provided is appropriately disposed inside, and the periphery of the outside is protected by a heat insulating portion 17 so as to avoid heat influence on these supply pipes 15 and 16.

At the tip of the plunger of each of the fluid pressure cylinders 14, a correction piece 21 for correcting and restoring the inwardly deformed abnormally deformed portion 4 of the cylindrical body 2 is disposed. I have. Each of these correction pieces 21 has an outer peripheral arcuate surface 22 that matches as much as possible following the inner surface diameter of the cylindrical body portion 2 after correction and restoration. In the state shown by the solid line in FIG. 2 in which the jar is reduced to a minimum, the jar is set to a size that can be inserted into the cylindrical portion 2 of the reaction vessel 1 including at least the abnormally deformed portion 4, and is extended to the maximum. In the state shown by the two-dot chain line in FIG.
The size and the shape are set so as to match or almost match the inner peripheral surface after the correction and restoration in the above.

Therefore, in the embodiment apparatus having the above-described configuration, first, the heater 6 whose heating is controlled in the heating furnace 5 is controlled.
As a result, the cylindrical portion 2 of the reaction vessel 1 is preliminarily heated to a required temperature in advance, and the crane 31 is used as a vertical movement mechanism, so that the expansion mechanism 11 is suspended and the vertical It is inserted so as to approach the abnormally deformed portion 4 on the center line. As a means for inserting and setting the expansion mechanism 11 at the center of the cylindrical portion 2 of the reaction vessel 1, for example, the flange portion 3 of the upper opening without deformation in the cylindrical portion 2 or the flange portion 3 What is necessary is just to carry out based on the nearby inner wall surface or the like.

Subsequently, in the above state, a controlled hydraulic pressure is supplied to each of the fluid pressure cylinders 14 of the expansion mechanism 11 inserted on the vertical center line in the cylindrical body portion 2 of the reaction vessel 1. By extending each plunger and operating each correction piece 21 in the radially expanding direction, the outer circumferential surface 22 of each correction piece 21 is formed.
Is pressed against the abnormally deformed portion 4, the correcting and restoring action of the deformed portion 4 by each of the outer peripheral circular surfaces 22 is started, and the plunger is further extended, so that the entire deformed portion 4 is Can be gradually restored.

That is, the operation of correcting and restoring the deformed portion 4 by each of the correction pieces 21 at this time is described below.
4 by increasing the water pressure in accordance with the restoring resistance at the abnormally deformed portion 4, so that the cylindrical portion 2 at the outer circumferential arc surface 22 of each correction piece 21 is increased. Due to the relationship between the contact pressure area on the deformed portion 4 and the predetermined fluid pressure applied to each fluid pressure cylinder 14, a larger correction force is applied to the deformed portion having a large deformation amount and a small contact pressure area to give priority. The plunger is further extended in a state where the outer peripheral surface 22 of each correction piece 21 is in contact with the inner peripheral surface of the cylindrical body portion 2 in this manner, so that the deformed portion 4 The whole is gradually restored, the intended restoration balance is automatically adjusted, and thereafter, when the restoration resistance of each correction piece 21 becomes equal to or less than a specific value, the outer circumferential arc surface 22 of each correction piece 21 is adjusted. The inner peripheral surface of the cylindrical body 2 Or Ho Isuzu intended to be match,
As a result, the intended abnormally deformed portion 4 is thus obtained.
Can be corrected to be uniform or almost uniform and restored.

[0024]

As described above in detail with reference to the embodiments,
According to the present invention, in the device for correcting and restoring the squeezed abnormal deformation of the cylindrical member in the cylindrical member, the expansion mechanism extends from the upper opening of the cylindrical member preheated to a required temperature to the inside of the cylindrical member. In the state of suspension, the required fluid pressure is applied to each fluid pressure cylinder to extend it, and while the respective correction pieces are controlled by the required amount to expand the diameter, they are brought into contact with the inner peripheral surface of the cylinder body in the horizontal direction. By actuating, the deformed portion of the cylindrical portion is evenly spread toward the outer peripheral side to correct and restore, so that abnormal deformation of the cylindrical portion caused by repeated use can be easily performed by a very simple operation. The cylindrical member can be restored to a normal state, and there is an excellent feature that the repeated use of such a cylindrical member can be remarkably improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view schematically showing a schematic configuration of an apparatus for correcting and restoring deformation of a cylindrical member such as a reaction vessel for metal production to which an embodiment of the present invention is applied.

FIG. 2 is an enlarged plan view schematically showing an arrangement of a half part of the configuration of the expansion device in the deformation correction / restoration device;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reaction container (cylindrical member) 2 Cylindrical part 3 Flange part 4 Abnormally deformed part 5 Heating furnace 6 Heater 7 Temperature sensor 11 Expansion mechanism 12 Support cylinder 13 Base plate 14 Fluid pressure cylinder 15 Water pressure supply pipe 16 Cooling water supply Pipe 17 Insulation part 21 Correction piece 22 Peripheral arc surface of correction piece 31 Crane (vertical movement mechanism)

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-3-194389 (JP, A) JP-A-59-189018 (JP, A) JP-A-50-1532 (JP, U) US Patent 5027635 (US , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 3/14

Claims (2)

(57) [Claims] 1. A method for restoring and restoring a squeezed abnormal deformation of a cylindrical portion of a cylindrical member, wherein an outer circumferential arc surface following a modified inner surface diameter of the cylindrical portion of the cylindrical member is formed. A plurality of correction pieces having a plurality of correction pieces are continuously connected along the circumferential surface, and each of the correction pieces is connected to the hydraulic cylinder to prepare an expansion mechanism configured to be able to radially expand in diameter. From the upper opening of the cylindrical member preheated to the required temperature, the expansion mechanism is suspended and held in the cylindrical body, and while the diameter of each of the correction pieces is controlled by a required amount, the inner peripheral surface of the cylindrical body is controlled. A cylindrical member such as a reaction vessel for metal production, wherein the cylinder is operated in the horizontal direction by directly contacting with the cylindrical member, and the deformed portion in the cylindrical portion is corrected and restored so as to be evenly spread toward the outer peripheral side. How to correct and restore the deformation. 2. An apparatus for restoring and restoring a squeezed abnormal deformation of a cylindrical portion of a cylindrical member, wherein the outer circumferential arc surface following the corrected inner surface diameter of the cylindrical portion of the cylindrical member is corrected. An expansion mechanism in which a plurality of correction pieces are connected along a circumferential surface, and each of the correction pieces is connected to a hydraulic cylinder so as to be able to radially expand in diameter; and The cylinder pre-heated to a required temperature in advance, comprising at least a fluid pressure control mechanism for supplying a required fluid controlled for diameter expansion operation, and an operating means for vertically operating the expansion mechanism in a vertical direction. From the upper opening of the cylindrical member, the expansion mechanism is suspended and held in the cylindrical body, and while the diameter of each of the correction pieces is controlled to be increased by a required amount, it is brought into direct contact with the inner peripheral surface of the cylindrical body to be horizontally oriented. And the deformed part of the cylinder An apparatus for correcting and restoring deformation of a cylindrical member such as a reaction vessel for metal production, which is capable of being uniformly pushed and spread toward an outer peripheral side so as to be restored.