JPH04139100A - Device for grinding inside of tube for growing artificial quartz crystal - Google Patents

Abstract

PURPOSE:To increase the efficiency of grinding of the inside of a tube for growing artificial quartz crystal by setting a movable body capable of ascending and descending along the axial direction of the tube and fitting a rotating body and a grinder to the movable body. CONSTITUTION:A movable body 7 is connected to a winch 10 with a cable so that it can automatically ascend and descend and guide rolls 13 with air cylinders 15 are brought into contact with the inner peripheral surface (inside) 5 of a tube. A rotating plate 17 capable of being rotated by a rotating motor 19 is fitted to the bottom of the movable body 7, an air cylinder 25 is fixed on the plate 17 and a grinder 23 is pressed and adhered to the inside 5 with the cylinder 25. The inside 5 is ground with the grinder 23 driven by a motor 21.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement of an internal surface grinding device for an artificial crystal growth tube or the like.

(Conventional technology) Artificial quartz is produced in an autoclave with a height of 10 m to 20 m.
Since the growth is carried out under conditions of high temperature (several hundred degrees) and high pressure (several hundred atmospheres) in an alkaline solution in an 11-pressure upright cylinder, the inner wall surface of the growth cylinder gradually corrodes due to chemical changes, and this corrosion There is a problem in that when the surface material peels off and falls into the cylinder, impurities get mixed into the crystal. Therefore,
The inner wall of the cylinder must be constantly ground and cleaned to prevent impurities from entering the crystal.
For example, as shown in FIG. 3, a conventional inner circumferential surface polishing device includes a base member 105 installed over the upper opening of a tube 101 in order to grind the inner circumferential surface 103 of an artificial crystal growth tube lot;
A shaft 107 that threads into a thread groove 105a formed in the base member +05 and passes through the base plate 105 vertically;
An elevating plate 109 fixed to the lower end of the shaft 107, and a rotary drive motor 11 swingably attached to the elevating plate 109]
and a grinder +13 fixed to the rotating shaft 111a of the drive motor 111, a subwang 115 for pressurizing the grinder 1]3 toward the inner circumferential surface 103 of the cylinder 101, and a handle +17 fixed to the upper part of the shaft 107, While grinding the inner circumferential surface 103 of the cylinder +01 by driving the drive motor I11, by rotating the handle +17, the elevating plate 109 is moved up and down via the shaft lO7, and the cylinder 10
There was one in which the entire inner circumferential surface +03 of No. 1 was ground by a grinder 113.

However, in such a conventional internal peripheral surface grinding device for an artificial quartz crystal growth tube, etc., it is necessary to extend the shaft 107 when lowering the elevating plate 109, but the joint member connecting the shaft 107 is In order to prevent interference with the base plate 105, it is necessary to connect the shaft 107 below the base plate 05, and the base plate +
The work of connecting the shaft 107 with the shaft 107 removed is not only troublesome, but also requires physical strength to operate the handle 117. Moreover, it is difficult to make the pitch of the screw l05a too large. The drawback was that the descending speed was slow and work efficiency was extremely low.

(Objective of the Invention) The present invention was made to eliminate the defects of the conventional grinding device as described above, and it does not require the complicated work of extending the shaft, and the inner periphery of the grinding device in the artificial crystal growth tube, etc. has high work efficiency. The purpose is to provide surface grinding equipment.

(Summary of the Invention) In order to achieve the above object, the present invention adopts the following configuration.

That is, there is a rotating body that can rotate relative to the vertically movable body which is suspended so as to be movable up and down along the axial direction of an upright cylinder by an elevator, and a rotating body that is rotatably supported with respect to the rotating body and is eccentric from the rotation axis of the rotating body. a grinding device including a grinding member attached to a shaft, and a plurality of guide rollers that are provided on the elevating moving body and move along the axial direction of the cylinder on the inner circumferential surface of the cylinder and are pressed in the radial direction of the cylinder. Configure it like this.

(Example) The present invention will be described in detail below based on a preferred example shown in the drawings.

1 and 2 show an embodiment of the present invention, in which a device for grinding the inner circumferential surface 5 of an artificial quartz crystal growth tube 1 is movable up and down along the axial direction of the tube 1. and cylinder l
A cylindrical lifting body 7 arranged so as not to come into contact with the inner circumferential surface 5 of the cylinder is suspended by a cable 9, and the upper end of the cable 9 is connected to a winch (elevator) 10 to automatically move the lifting body 7. It is configured to move up and down.

The elevating and lowering moving body 7 includes a plurality of guide rollers 13 and 13 that move along the axial direction of the inner circumferential surface 5 of the tube 1 in order to support the elevating and lowering moving body 7 against the inner circumferential surface 5 of the tube 1. The air cylinder 15.15 is equipped with an air cylinder (biasing means) 15.15 that presses the guide roller 13.13 in the radial direction of the cylinder l. The inner circumferential surface 3 is pressed with a pressure that prevents this from happening. Three guide rollers 13 are provided in the circumferential direction for each of the upper and lower sides so that the elevating and lowering movable body 7 is always raised and lowered along the central axis of the cylinder l.

An autorotating plate (rotating body) 17 is provided below the elevating movable body 7, and is rotatably supported by the elevating movable body 7 and capable of rotating about the central axis of the cylinder 1. 7 is configured to be rotationally driven by a rotator (driving means) 19 fixed to the elevating and lowering movable body 7. The rotating plate 17 is provided with a motor (driving means) 2+ having a drive shaft 2]a that is rotatable around an axis located at a position 1 eccentric to the rotation axis of the rotating plate 17. A grinder (grinding member) 23 for grinding the inner peripheral surface 5 of the cylinder 1 is fixed to the lower end. The middle part of the motor 21 is pivoted to the rotation plate 17 so as to be able to swing freely in the radial direction of the cylinder l, and the upper part of the motor 21 is attached to an air cylinder (pressure mechanism) 2 provided on the rotation plate 17.
5, the grinder 23 is pressurized toward the inner circumferential surface 5 of the cylinder l.

With this configuration, by driving the motor 21, the grinder 23 rotates and grinds the inner peripheral surface 5 of the artificial crystal growth cylinder l, and by driving the rotation motor 19, the grinding position by the grinder 23 is adjusted to the position of the cylinder l. By moving along the circumferential direction and lowering the grinding position by the grinder 23 by driving the winch 10, the entire inner peripheral surface 5 of the cylinder 1 can be ground. Grinder 23
The shavings from the grinding can be easily removed by suctioning with a vacuum cleaner hose or the like inserted through the opening of the cylinder l, or by pulling up a cloth dropped into the bottom of the cylinder l.

The pressing force applied to the inner circumferential surface 5 of the cylinder 1 of the grinder 23 can be kept constant by adjusting the air pressure of the air cylinder 15.15, and can also be made variable depending on the state of the inner circumferential surface 5. In addition, since the pressure contact force of the guide roller 13.13 against the inner circumferential surface 3 can be adjusted by the air cylinder 15.15, it is possible to cope with cylinders 1 having different inner diameters, improving versatility, and Grinding work can be performed while maintaining the supporting state of the elevating and lowering movable body 7 even when the inner diameter of the cylinder l changes vertically.

When the grinder 23 reaches the bottom of the cylinder 1, a detection means (not shown) drives the air cylinder 25 to remove the grinder 23 from the inner peripheral surface 3, and stops driving the rotation motor 19 and the rotation motor 2I. Then, by winding the winch 10, the elevating movable body 7 is moved to the cylinder 1.
It can be taken out from.

As described above, according to this embodiment, when raising and lowering the elevating movable body 7, there is no need to perform the complicated extension of the shaft via a joint member as in the conventional case, and the work efficiency can be significantly improved. .

Note that the present invention is not limited to the above embodiment, and the grinder 23 may be pressed against the inner circumferential surface 3 with a constant pressure by a spring instead of the air cylinder 25. Furthermore, the present invention is applicable not only to the growth tube 1 for artificial quartz, but also to the cleaning of chimneys and the grinding and cleaning of reaction tubes used in chemical plants.

(Effects of the Invention) As explained above, according to the present invention, since the amount of elevation can be adjusted using the elevator, the complicated shaft extension work is no longer necessary, and the efficiency of grinding work is significantly improved. There is a benefit 9

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an internal surface grinding device for an artificial crystal growth tube, etc. according to the present invention, FIG. 2 is a perspective view of the main part with a part of FIG. 1 cut away, and FIG. 3 1 is a configuration diagram of a conventional internal peripheral surface grinding device. l... Artificial crystal growth tube, 5... Inner peripheral surface of tube, 7...
- Lifting moving body, 13... Guide roller, 15... Air cylinder (biasing means), 17... Rotating plate (rotating body)
, 19... Rotation motor (driving means), 23... Grinder (grinding member), 25... Air cylinder (pressure mechanism) Figure 2 Third factor

Claims (1)

[Scope of Claims] An elevating moving body suspended by an elevator so that it can be raised and lowered along the axial direction of the inner circumferential surface of an upright cylinder, and a central axis of the cylinder that is rotatably supported on the elevating moving body. a rotating body capable of rotating about its rotation center; a driving means for rotating the rotating body provided on the elevating and lowering moving body; A grinding device including a grinding member that rotates around a shaft, a driving means that rotationally drives the grinding member, and a pressurizing mechanism that is provided on the rotating body and pressurizes the grinding member toward the inner circumferential surface of a cylinder. This is an inner circumferential surface grinding device for artificial crystal growth, etc., which is provided on the elevating movable body to support the elevating movable body against the inner circumferential surface of the cylinder, and grinds the inner circumferential surface of the cylinder along its axial direction. 1. An inner peripheral surface grinding device for an artificial crystal growth tube, etc., comprising a plurality of moving guide rollers and a biasing means capable of pressing the guide rollers in the radial direction of the tube.