JPH1086012A - Portable saddle type of pipe table beveling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable saddle type of pipe table beveling device capable of easily forming a saddle type of beveling on a workpiece pipe without using handwork. SOLUTION: A securing table 1 detachably attached to a workpiece pipe 21, a sliding table 3 for free sliding on the securing table 1 in the axial direction of the workpiece pipe 21, a rotary table 8 adapted for turning within a transverse plane of the workpiece pipe 21, an elevator table 16 adapted for free vertical movement in the diametral direction of the workpiece pipe 21, and a drive motor 17 for driving a cutter are provided to apply a saddle type of beveling to the workpiece pipe 21 by moving the cutter 20 driven for rotation with a drive motor 17 in the axial, circumferential, and diametral directions.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable saddle-type beveling device, and more particularly, to a case where an existing piping nozzle is replaced in a nuclear power plant or the like. It is useful. 2. Description of the Related Art A large number of pipes are installed in a nuclear power plant, and when replacing the existing pipes, an existing nozzle to which the existing pipes are fixed is removed in order to remove the existing pipes. It is necessary to replace it with a nozzle. FIG. 3, FIG. 4, and FIG. 5 are explanatory views showing the procedure of an operation of removing an existing pipe, performing a saddle-shaped groove processing, and then welding a new nozzle. In these figures, 21 is a pipe to be processed, 2
2 is an existing nozzle, 23 is a saddle groove, 24 is a new nozzle, 25 is an existing pipe, 26 is a new pipe, and D is a removal range. The black portions in the figure are welded portions. As shown in these figures, in the work, first, the existing nozzle 22 is removed together with the existing pipe 25 (see FIG. 3). Next, a saddle-shaped groove 23 is formed on the pipe 21 to be processed (see FIG. 4). Finally, the new nozzle 24 and the new pipe 26 are welded to predetermined positions (see FIG. 5). In such an operation, three-dimensional machining is required for saddle-shaped beveling, and this saddle-shaped beveling has been conventionally performed manually using a drill and a grinder. [0004] Since the work of removing the existing nozzle 22 and the existing pipe 25 with the saddle-shaped groove processing as described above involves manual saddle-shaped groove processing, the work efficiency is reduced. bad.
On the other hand, recently, the replacement of existing nozzles with new nozzles at nuclear power plants has been increasing. For this reason, a portable saddle-type beveling machine is generally used to improve the work efficiency of the above-described saddle-shaped beveling in pipe replacement work in a bad environment, such as reducing the exposure of workers and increasing the work efficiency. The development of has been requested. SUMMARY OF THE INVENTION In view of the above-mentioned prior art, an object of the present invention is to provide a portable saddle type groove processing apparatus capable of easily processing a saddle groove on a pipe to be processed without manual operation. The structure of the present invention that achieves the above object has the following features. 1) A moving table configured to move in the axial direction of the pipe to be processed, a rotating table configured to rotate in a circumferential direction in a cross section of the pipe to be processed, and a diametrical direction of the pipe to be processed. A lifting table configured to move up and down, and a cutter driving mechanism are arranged on a fixed table detachably attached to the pipe to be processed, and the cutter is three-dimensionally arranged in the axial, circumferential, and diametric directions of the pipe to be processed. In the direction to process the saddle-shaped groove on the pipe to be processed. 2) A fixed base configured to be detachably attached to the pipe to be processed, a movable base configured to be movable on the fixed base in the axial direction of the pipe to be processed, and a fixed base fitted to the movable base. A rotating table configured to be able to rotate in the circumferential direction in the cross section of the processing pipe, a lifting table mounted on the rotating table so as to be able to move up and down in the diameter direction of the pipe to be processed, and a cutter installed on the lifting table And a drive mechanism, wherein the cutter is moved in the three-dimensional directions of an axial direction, a circumferential direction, and a diametrical direction of the pipe to be processed to process a saddle groove on the pipe to be processed. 3) In 2), the moving table has a sliding plate for guiding the moving table to move on a concentric arc of the pipe to be processed. 4) In 1) to 3), each of the driving means of the moving table, the rotating table, the elevating table, and the cutter is constituted by a motor and can be automatically controlled remotely. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an assembled sectional view showing an embodiment of the present invention, and FIG. In both figures, the same parts as those in FIGS. 3 to 5 are denoted by the same reference numerals, and redundant description will be omitted. The fixing base 1 is mounted on the outer peripheral surface of the pipe 21 to be processed by a fixing metal fitting 2 which is easily detachable. The moving table 3 slides on the fixed table 1 in the axial direction of the pipe 21 to be processed (the direction of arrow Y in FIG. 1) by rotating the ball screw shaft 7 via the toothed belt 6 by the slide motor 5. While moving, the arc gear 4 concentric with the pipe 21 to be processed is fixed. The turntable 8 is supported by the gear 4 by the support metal 9 and is guided by the sliding plate 12 and turns along the outer periphery of the gear 4 by the rotation of the turn motor 10 and the gear 11 (in the direction of arrow X in FIG. 1). It is configured to do so. Here, the gear 11 is a rotating motor 1
0 and is in mesh with the gear 4.
The rotation motor 10 repeats normal rotation and reverse rotation at predetermined intervals. Thus, the rotation of the rotating motor 10 causes the gear 11 to rotate.
Rolls on the gear 4, and as a result, the rotating motor 10 and the rotating table 8 rotate integrally on the concentric arc of the pipe 21 to be processed. Here, the sliding plate 12 regulates the position at the time of turning the turntable 8 in order to ensure the turning of the workpiece tube 21 on a concentric arc. An elevating motor 13 is fixed to the turntable 8 and drives the ball screw shaft 14 to rotate. Ball screw shaft 1
Numeral 4 is screwed into a ball screw nut 15, and a lift 16 is fixed to the ball screw nut 15. Thus, the lift 16 is moved up and down by moving the lift motor 13 and the ball screw shaft 14 in the diameter direction (the direction of the arrow Z in FIG. 2) of the pipe 21 to be processed. The drive motor 17 is a lift 16
The cutter 20 is rotated via gears 18 and 19. When a saddle-shaped groove is machined using the apparatus according to the present embodiment as described above, first, the fixing base 1 is attached and fixed to the pipe 21 to be processed by the fixing bracket 2. After that, the cutter 20 is driven by driving the slide motor 5 so that
1 to move the cutter 20 on a circular arc concentric with the processing pipe 21 in the cross section of the processing pipe 21 by driving the rotation motor 10 and further driving the lifting motor 13. By driving the drive motor 17 while moving the cutter 20 in the diameter direction of the pipe 21 to be processed, the three-dimensional saddle groove preparation is performed. The processing at this time can be performed remotely, or can be performed automatically. In the embodiment described above, the moving table 3 is mounted on the fixed table 1, the rotating table 8 is mounted on the moving table 3, and the lifting table 16 is mounted on the rotating table 8 sequentially. However, the mounting order is not limited to this. In short, it is only necessary that the cutter 20 be configured to be able to move in the axial direction and the diametrical direction of the pipe 21 to be processed, and to be able to rotate on the circumference in the cross section of the pipe 21 to be processed. In this case, the circumference is optimally on a concentric arc of the pipe 21 to be processed. By replacing the cutter 20, drilling and beveling can be performed continuously. According to the present invention, the following effects can be obtained as specifically described above with reference to the embodiments. 1) It is portable and can be easily installed at the required position. 2) Three-dimensional saddle-shaped beveling can be performed remotely and efficiently. 3) The health and safety of workers can be ensured even in places with poor working environments such as nuclear power plants.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembled sectional view according to an embodiment of the present invention. FIG. 2 is a view taken in the direction of the arrow A in FIG. 1; FIG. 3 is an explanatory diagram showing an existing pipe, an existing nozzle, and a deletion range. FIG. 4 is an explanatory view showing a saddle groove. FIG. 5 is a view showing a state after welding of a new nozzle. [Description of Signs] 1 Fixed base 2 Fixed bracket 3 Moving base 5 Slide motor 8 Rotating base 10 Rotating motor 11 Gear 12 Sliding plate 13 Lifting motor 14 Ball screw shaft 15 Ball screw nut 16 Lifting table 17 Drive motor Reference Signs List 20 Cutter 21 Worked pipe 23 Saddle groove 24 New nozzle

Claims (1)

Claims 1. A moving table configured to move in the axial direction of a pipe to be processed, and a rotating table configured to rotate in a circumferential direction in a cross section of the pipe to be processed. A lifting table configured to move up and down in the diameter direction of the pipe to be processed, and a cutter driving mechanism are disposed on a fixed table detachably attached to the pipe to be processed, and the cutter is disposed in an axial direction of the pipe to be processed. A portable saddle-type grooved groove processing apparatus characterized in that the saddle-shaped groove is machined in a pipe to be processed by moving in a three-dimensional direction in a circumferential direction and a diameter direction. 2. A fixed base configured to be detachably attached to a pipe to be processed, a movable base configured to be movable on the fixed base in an axial direction of the processed pipe, and a movable base fitted to the movable base. A rotary table configured to be rotatable in the circumferential direction in the cross section of the processing pipe, a lifting table mounted on the rotary table so as to be able to move up and down in the diameter direction of the pipe to be processed, and a cutter installed on the lifting table And a drive mechanism, wherein the cutter is moved in three-dimensional directions of an axial direction, a circumferential direction, and a diametrical direction of the pipe to be processed, and the saddle-shaped groove is formed on the pipe to be processed. A portable saddle type beveling device. 3. The portable saddle type tube according to claim 2, wherein the movable stage has a sliding plate for guiding the movable stage to move on a concentric arc of the pipe to be processed. Table bevel processing equipment. 4. A moving means, a rotating table, an elevating table, and a driving means for a cutter are respectively constituted by motors so that they can be automatically controlled remotely.
[3] A portable saddle type nozzle groove processing apparatus according to any one of [3].