KR20170056862A - The cutting machine for a power plant valve - Google Patents

The cutting machine for a power plant valve Download PDF

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Publication number
KR20170056862A
KR20170056862A KR1020150160217A KR20150160217A KR20170056862A KR 20170056862 A KR20170056862 A KR 20170056862A KR 1020150160217 A KR1020150160217 A KR 1020150160217A KR 20150160217 A KR20150160217 A KR 20150160217A KR 20170056862 A KR20170056862 A KR 20170056862A
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KR
South Korea
Prior art keywords
shaft
casing
cutting
valve
circumferential surface
Prior art date
Application number
KR1020150160217A
Other languages
Korean (ko)
Inventor
맹다해
Original Assignee
주식회사 동방브이앤티
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Application filed by 주식회사 동방브이앤티 filed Critical 주식회사 동방브이앤티
Priority to KR1020150160217A priority Critical patent/KR20170056862A/en
Publication of KR20170056862A publication Critical patent/KR20170056862A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/02—Milling surfaces of revolution
    • B23C3/05—Finishing valves or valve seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C1/00—Milling machines not designed for particular work or special operations
    • B23C1/06—Milling machines not designed for particular work or special operations with one vertical working-spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C1/00—Milling machines not designed for particular work or special operations
    • B23C1/20—Portable devices or machines; Hand-driven devices or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2260/00—Details of constructional elements
    • B23C2260/04—Adjustable elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2270/00—Details of milling machines, milling processes or milling tools not otherwise provided for

Abstract

The present invention relates to a height-adjustable cutting machine for a valve for a power plant, capable of quickly and conveniently cutting a seat ring for various sized valves, thicknesses, and inner/outer diameters, to stably remove the seat ring. According to the present invention, the cutting machine comprises: a base main body unit having a tub-shaped main body casing with opened upper and lower parts concentrically fixated and installed on the upper surface part of the head part of a valve to be cut, and having a worm gear on the upper part of the outer circumferential surface of the main body casing to be able to rotate; a rotary body part having a cylindrical rotary body combined with the inside of the main body casing to be able to rotate and having a worm hole fixated and installed on the outer circumferential surface of the upper part of the rotary body to be rotated by being engaged with the worm gear; a diameter adjustment unit having a guide rail member fixated and installed on the upper part of the rotary body and having a guide block, through which a shaft casing penetration tube is vertically penetrated on the central part thereof, guided and combined with the upper surface part of the guide rail member to be able to laterally move, to be laterally placed in accordance with the diameter of a seat ring of the valve; a lifting/lowering rotary unit having the shaft casing with a longitudinally long tubular shape penetrating through the shaft casing penetration tube and the rotary body to be able to vertically adjust and having a rotary shaft rotated by receiving driving power from a driving motor inside the shaft casing; a height adjustment unit installed in the upper part of the shaft casing penetration tube, and having a ball plunger locked and coupled with a locking groove formed on the outer circumferential surface of the shaft casing and having an attachment plate attached and supported on the outer circumferential surface of the shaft casing to fixate the height-adjusted shaft casing; and a cutting unit connected and installed in the lower part of the shaft casing and having a cutting bit to cut the seat ring while receiving the driving power from the rotary shaft to be rotated.

Description

[0001] The present invention relates to a cutting apparatus for a power plant,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cutting apparatus which can easily mount a new seat ring by simply cutting a damaged seat ring when the seat ring is worn or damaged in an openable and closable valve installed in a piping line of various power plants, A main body casing having an upper portion and a lower portion open and fixed concentrically on an upper surface of a head portion of a valve to be cut, a base body portion provided on an upper portion of the outer surface of the main body casing so that the worm gear rotates, And a guide rail member fixedly installed on an upper portion of the rotary body, and a guide rail member fixedly installed on an upper portion of the rotary body, wherein the rotary body has a worm wheel fixedly mounted on an upper outer peripheral surface of the rotary body, The upper surface portion of the rail member is vertically upwardly inserted into the center portion of the shaft casing pipe And a shaft casing which is vertically and horizontally long and which is installed to be adjustable in height by penetrating through the shaft casing pipe and the rotating body in a vertically long tubular shape And an outer circumferential surface of the outer circumferential surface of the shaft casing which is engaged with the engaging groove of the outer circumferential surface of the shaft casing while being installed on the upper portion of the shaft casing pipe, And a cutting bit which is connected to a lower portion of the shaft casing and is connected to a lower portion of the shaft casing and is rotated by receiving a driving force from the rotation shaft to cut the seat ring, To a height-adjustable cutting device for a power plant valve.

Generally, in various power plants, a large amount of water or fuel has been used to start and control power generation facilities. In such facilities, it is necessary to install a pipeline for transferring water or fuel through large pipes or conduits In order to control the flow of the fluid, a large number of large opening / closing valves having the form of a check valve or the like is installed in the piping line.

The opening / closing valve of the power plant has a diaphragm integrally formed with a drain hole therein, and a disk member for opening and closing the drain hole of the diaphragm is lifted and lowered in accordance with the rotation of the handle mounted on the head portion. The seat ring is fixedly installed on the inner circumferential surface of the discharge hole of the diaphragm so that the disc valve and the seat ring come into close contact with each other to prevent water leakage. However, since the disc valve is repeatedly opened and closed by the disc member for a long time, In this case, it is difficult to remove only the existing seat ring which is conventionally fixedly attached to the inner circumferential surface of the drain hole from the diaphragm of the valve, so that it is difficult to remove the entire opening / closing valve To a new one. With prolonged action to remove the entire valve from the valve when the line increases maintenance costs for reinstallation and reinstallation there is a problem that this causes major problems in the development function.

As a conventional technique for solving the above problems, Korean Patent Registration No. 10-0372272 discloses an apparatus for replacing a worn metal ring incorporated in a fluid flow opening / closing valve at a predetermined position, A discharge machining electrode which is formed in a two-step circular disk shape so as to cut the workpiece by electric discharge machining by applying (+) electric charge to the workpiece; First positioning means for horizontally moving and controlling the position of the discharge machining electrode in the X-axis direction; Second positioning means for horizontally moving and controlling the position of the machining electrode in the Y-axis direction; Third positioning means for vertically moving and controlling the position of the machining electrode in the Z-axis direction; Fourth positioning means for controlling the position of the machining electrode so as to repeat the progressive approach and retreat operation in the C-axis direction; A head motor assembly for transmitting a rotational force by a belt and a pulley so that the working electrode can approach and retract in a C-axis direction with respect to the workpiece while rotating; Welding means after the cutting process, the assembly with the welding torch and welding wire integrated therewith intended to weld between the annular contact surface of the new ring and the valve body; And a motor for applying the electric current to the electric discharge machining electrode from an external power source and for driving the first, second, third and fourth orienting means, the head portion motor assembly, the welding means, Disclosed is a metal ring replacement device incorporated in a fluid opening / closing valve composed of an external control device for remotely controlling operation.

However, in the above-mentioned prior art, only a valve equipped with a seat ring having a specified size and diameter is formed in a two-step disk shape so that the discharge machining electrode can cut the predetermined inner diameter of the ring, It is not applicable to a valve equipped with a seat ring having a thickness, an inner diameter and an outer diameter. Moreover, since the entire apparatus is placed separately from the valve, only the discharge machining electrode is inserted into the valve, The valve is moved by the impact and vibration during the machining process, and the discharge machining electrode is not brought into close contact with the seat ring, so that the machined surface is not smooth and uniform.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a valve head of a power plant to be cut, having a cylindrical main body casing fixedly installed concentrically on an upper surface thereof, A guide rail member is fixed to an upper portion of the rotary body, and an axial casing pipe is vertically upwardly fixed to a guide block provided on an upper portion of the guide rail member so as to move left and right, And the shaft casing vertically penetrated through the shaft casing pipe and the through hole is rotated in a state in which the left and right positions are adjusted in accordance with the inner and outer diameters of the valve seat ring and the shaft casing is raised and lowered The height of the shaft can be adjusted so that the position of the seat ring mounted on the inner side of the valve and the thickness of the shaft casing The present invention has been made to solve the above problems, and it is an object of the present invention to provide a seat ring of a valve having various sizes, thicknesses, inner diameters, and outer diameters by stably and quickly cutting and cutting the seat ring of the valve seat.

In order to achieve the above object, a valve body of the present invention includes a main body casing having an upper portion and a lower portion fixed to the upper surface of a head portion of a valve to be cut, and a worm gear is rotatably mounted on the upper portion of the main body casing. And a cylindrical body rotatably coupled to the inside of the main body casing. The rotating body is rotatably coupled to the worm gear while the worm wheel is fixed to the outer peripheral surface of the rotating body. A guide member having a rail member and a guide rail member having a diameter adjusting portion which is guided by a guide block having a vertical upper portion through which an axial casing pipe is inserted through the center portion thereof, , The upper casing has a long tubular shape, and the height of the casing casing pipe and the rotating body is adjusted to be height- A lifting and rotating unit provided with a casing and provided with a rotation shaft rotatably received by a driving motor from a driving motor is provided inside the casing, a ball plunger provided on an upper portion of the casing casing pipe, And a cutting bit which is connected to a lower portion of the shaft casing and is connected to a lower portion of the shaft casing and is rotated by receiving a driving force from the pivot shaft to cut the seat ring Which is characterized by the fact that the present invention is characterized in that it is made of a cutting edge.

As described above, according to the present invention, there is provided a cylindrical main body casing fixedly installed concentrically on the upper surface of a valve head of a power plant to be cut. A rotating body is rotatably installed inside the main casing, In the guide block, which is fixedly installed on the upper portion of the guide rail member, a shaft casing pipe is vertically fixed to the guide block, and the through hole is formed in the left and right long holes Axial casing The shaft casing, which is vertically penetrated through the through-hole and the through-hole, is rotated in a state in which the right and left positions are adjusted according to the inner and outer diameters of the valve seat ring, and the up- According to the position and thickness of the installed seat ring, Bit for engaging a seat height adjustment ring whereby there is an effect that can be a cutting surface uniformly machined smooth and reliable easily machined in a short time the seat ring in various sizes and thickness, and within, the valve having an outer diameter.

1 is a front schematic view of a height-adjustable cutting and working apparatus for a power plant valve according to the present invention;
Fig. 2 is a longitudinal sectional schematic view showing an exploded state of a height-adjustable cutting and working apparatus for a power plant valve according to the present invention.
3 is a longitudinal sectional schematic view showing an assembly state of a height-adjustable cutting and working apparatus for a power plant valve according to the present invention.
4 is a schematic cross-sectional view taken along line A-A '
5 is a schematic cross-sectional view taken along line B-B '
6 is a schematic longitudinal sectional view of a height-adjustable cutting apparatus for a power plant valve according to the present invention,
FIG. 7 is a schematic view of a longitudinal section of a height-adjustable cutting and processing apparatus for a power plant valve according to the present invention, in which a guide block is moved to the right,
8 is a view illustrating a state in which a height-adjustable cutting device for a power plant valve according to the present invention is installed in a concentric manner on a top surface of a head portion of a valve, and a cutting bit is installed at a turning radius corresponding to the inner diameter of the seat ring, Sectional schematic
FIG. 9 is a perspective view illustrating a state in which a height-adjustable cutting device for a power plant valve according to the present invention is fixed concentrically on an upper surface of a head portion of a valve, and the guide block is gradually moved to the left by a cutting width of the seat ring, A schematic cross-sectional view of the state in which the turning radius is enlarged and the elevating /

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 to 9, the height-adjustable cutting and working apparatus 1 for a power plant valve according to the present invention comprises a seat ring 7 of an openable and closable valve 3 installed in a piping line of various power plants, The present invention relates to a cutting apparatus which is capable of easily mounting a new seat ring 7 by simply cutting a valve seat 7 to be mounted on a head portion 4 of a valve 3 to be cut, A main body casing 2 in which a worm gear 11 is rotatably mounted on an upper portion of the outer surface of the main casing 5 and a main body casing 2 having a tubular main body casing 5 in which upper and lower portions are opened, A rotatable body portion 13 which is rotatably coupled with the worm wheel 11 and rotates while being meshed with the worm wheel 11 is provided on the outer peripheral surface of the upper portion of the rotating body 14, A guide rail member 19 fixedly installed on the upper portion of the body 14 is provided A guide block 20 having an axial casing pipe 25 penetratingly and vertically upwardly inserted into the center portion of the guide rail member 19 is guided so as to move left and right so that the diameter of the seat ring 7 of the valve 3 And a shaft casing 29 which is vertically and horizontally arranged and whose height is adjusted by passing through the shaft casing pipe 25 and the rotary body 14, A lifting and rotating part 28 provided on the inside of the casing 29 and provided with a rotating shaft 31 that is rotated by receiving a driving force from the driving motor 30 and a shaft casing 29 A ball plunger 40 which is engaged with the engaging groove 36 of the outer circumferential surface and a tightening plate 41 which is tightly supported on the outer circumferential surface of the shaft casing 29 to fix the shaft casing 29 of height- (39) which is connected to a lower portion of the shaft casing (29) and is rotated by receiving a driving force from the rotary shaft (31) The seat ring provided with a cutting bit 53 for cutting a 7 jeolsakga study consists of 48.

As shown in FIGS. 1 to 5, 7, 8 and 9, the base body part 2 is provided on the upper surface of the openable and closable valve 3 installed on the piping line of the power plant to be cut, A main body casing 5 fixed to the top surface of the head portion 4 of the valve 3 to be cut and having a top and bottom open and fixed concentrically is provided, The worm gear 11 is rotatably mounted on the upper surface of the main casing 5 so that the ring-shaped mounting flange 6 positioned horizontally on the lower surface of the main casing 5 is detachably mounted with bolts or the like 8 and 9, the mounting flange 6 is formed so as to have the same inner and outer diameters as the inside and outside diameters of the head portion 4 of the openable and closable valve 3 installed in the piping lines of various power plants, Depending on the size of the head portion 4 of the valve 3, The outer circumferential surface of the mounting flange 6 is assembled in a state in which the center of the mounting flange 6 is coincident with the center of the mounting flange 6 on the bottom face of the main casing 5 in a state in which the outer diameter is processed in accordance with this, The base body portion 2 is fixedly installed concentrically so as to coincide with the center of the valve 3 in a state where the base body portion 2 is partially welded to the outer peripheral surface of the valve body 4 and is orthogonal to the upper face portion of the head portion 4 of the valve 3 After the cutting operation of the seat ring 7 of the valve 3 is completed, the welded portion of the mounting flange 6 and the head portion 4 of the valve 3 is removed and the height regulating cutting device 1 ) From the openable and closable valve (3).

The opening and closing valve 3 is inserted into the upper portion of the head portion 4 and is lifted and lowered by a handle so that a disk member (not shown) for opening and closing the seat ring 7 provided on the inner peripheral surface of the drain hole of the diaphragm 27 Is removed together with the handle, the damaged sheet ring 7 inside the valve 3 is subjected to a cutting process.

One or a plurality of rotating body bearings 8 are provided at regular intervals on the inner circumferential surface of the main body casing 5 and a rotating body 14 penetrates inside the rotating body bearing 8 A worm gear mounting base 9 is fixed to one side of the outer circumferential surface of the main body casing 5 and a gear shaft 10 is rotatably installed on the upper portion of the worm gear mounting base 9 in the front- The worm gear 11 is integrally formed on the outer circumferential surface of the shaft 10 and an operation handle 12 is connected to one end of the gear shaft 10 so that the operation handle 12, The worm wheel 11 is rotated so that the worm wheel 16 of the rotating body 14, which is engaged with the worm gear 11, is driven to rotate.

1 to 5, 7, 8, and 9, the rotating body 13 is rotated together with the lifting / pivoting portion 28, which is inserted through the inside of the rotating body portion 13, so that the inner peripheral surface of the seat ring 7 of the valve 3 A cylindrical rotating body 14 rotatably coupled to the inside of the main body casing 5 is provided as a portion for performing the cutting work by the cutting work 48 and a worm wheel The rotating body 14 is vertically penetrated through the inside of a rotating body bearing 8 provided on the inner circumferential surface of the main casing 5, And a worm wheel 16 is integrally fixed to an upper outer circumferential surface of the upper portion protruding from the upper end of the upper end of the main body casing 5 so as to be engaged with the worm gear 11 of the base body portion 2, When the worm wheel 11 is rotated by the operation handle 12, And a male screw portion is formed on the outer circumferential surface of the lower end portion of the rotating body 14 so that the finishing nut 17 is screwed from below and the rotating body 14 is rotated So that the flow of the rotating body 14 and the rotating body 14 can be prevented from escaping toward the upper side of the main casing 5.

As shown in FIG. 5, the through hole 15 is formed in the rotary body 14 so as to be vertically longer than the longitudinal length of the rotary body 14, The shaft casing 29 of the elevating and pivoting portion 28 having an outer diameter corresponding to the front and rear lengths of the through hole 15 is vertically penetrated in conformity with the inside of the through hole 15, So as to be movable.

As shown in FIGS. 1 to 5, 7, 8, and 9, the diameter adjusting portion 18 adjusts the left and right positions of the lifting and pivoting portion 28 in accordance with the diameter of the seat ring 7 to be cut, And a guide rail member 19 fixed to the upper portion of the rotary body 14 is provided on the upper surface of the guide rail member 19. The upper surface of the guide rail member 19 is vertically upwardly A guide block 20 having an axial casing pipe 25 penetratingly inserted therein is guided so as to be moved to the left and right so as to be horizontally adjusted in accordance with the diameter of the seat ring 7 of the valve 3, 19 are integrally fixed to the upper portion of the rotating body 14 in a horizontally positioned plate shape and are adapted to rotate together. In the middle portion thereof, upper and lower portions, which are the same size and shape as the through holes 15 of the rotating body 14, The communication hole 22 is perforated so that the through hole 15 and the upper communication hole 22 are formed, And a rail groove 23 is formed horizontally on the front and rear sides of the upper surface of the guide rail member 19 so that the guide block 20 is fitted between the front and rear side rail grooves 23, And bolt fastening pieces 24 are fixedly installed on both left and right ends so as to protrude upward. The left and right bolt fastening pieces 24 are each formed with a female screw hole at the center thereof, The adjusting bolts 21 are inserted into the guide blocks 20 while being inserted into the guide blocks 20 while being inserted therethrough. As shown in FIGS. 7 and 9, when the left and right adjusting bolts 21 are loosened or tightened As the left and right positions of the guide block 20 are adjusted, the right and left positions of the elevating and pivoting portion 28 are adjusted together, and accordingly, the height of the elevating and pivoting portion 28 So that the turning radius of the cutting sprocket 48 connected to the lower portion is adjusted to be enlarged or reduced.

The shaft casing pipe 25 is integrally fixed to the center of the guide block 20 vertically upward so as to be integrally fixed with the guide block 20 so as to move left and right together with the guide block 20, The flange plate 26 is fixed to the outer circumferential surface of the upper end of the axial casing pipe 25 in such a manner that the axial casing 29 is fitted into the axial casing 29, And is mounted on the upper surface of the flange plate 26 so that the ball plunger 40 and the tightening plate 41 of the unit 39 are installed.

1 to 9, the lifting and lowering rotary part 28 is lifted and lowered in accordance with the installation position of the seat ring 7 provided on the valve 3 and the thickness of the seat ring 7, And a shaft casing 29 which is vertically long and which is installed to adjust the height of the shaft casing pipe 25 and the rotating body 14 through the shaft casing 29, The shaft casing 29 is formed as a circular tube having upper and lower portions opened and an outer diameter of the shaft casing 29 is formed in the axial casing pipe 25 And penetrates through the through-hole 15 of the shaft casing pipe 25 and the rotating body 14 so as to protrude to the outside of the lower portion of the main body casing 5. In the upper and lower portions of the main casing 5, 32a and 32b are provided on the inner side of the shaft bearings 32a and 32b, The motor mounting plate 33 is horizontally fixed to the upper surface portion of the shaft casing 29 and the driving motor 30 is mounted on the motor mounting plate 33, So that the driving force is transmitted to the coaxial shaft 31.

The rotary shaft 31 penetrates the shaft bearings 32a and 32b of the shaft casing 29 and has upper and lower ends projecting outwardly and upwardly from the shaft casing 29 The upper driven pulley 34a is connected to the driving pulley 35 provided on the shaft of the driving motor 30 by a belt or the like and the lower driven pulley 34b is connected to the driving pulley 35 48 are connected to a connecting pulley 51 axially extended from the upper end of the cutting shaft 50 by a belt or the like so that the driving force from the driving motor 30 is transmitted to the cutting shaft 50 through the rotary shaft 31 .

The shaft casing 29 has a plurality of engaging grooves 36 formed on one side of the outer circumferential surface on the upper and lower straight lines so that the balls 39 of the ball flange 40 provided at the upper portion 39 are engaged with the engaging grooves 36 And a shaft casing 29 which is vertically adjustable in height and which is in contact with the fastening plate 41 of the fastening portion 39 in a tightly supported state, Is maintained in a fixed state.

7, the lifting and lowering rotary part 28 is mounted on the upper part of the motor mounting plate 33 fixed to the upper surface of the shaft casing 29, And the drive motor 30 is fixed vertically downward on the upper surface of the mount table 37 and the shaft of the drive motor 30 is connected to the upper end of the rotary shaft 31 and the coupler 38 To directly receive the driving force.

A key groove 54 is formed on the outer side of the shaft casing 29 in a straight line. A key projection 55 is formed on the inner circumferential surface of the shaft casing pipe 25 in a straight line, The key projections 55 are inserted into the key grooves 54 of the shaft casing 29 passing through the casing pipe 25 so that the shaft casing 29 is not loosened.

1 to 3, 7, 8 and 9, the heightening and fixing portion 39 fixes the shaft casing 29, which is vertically adjustable in height in accordance with the size of the valve 3 and the processing of the seat ring 7 A ball plunger 40 which is installed on an upper portion of the axial casing pipe 25 and which is engaged with the engagement groove 36 of the outer circumferential surface of the shaft casing 29 and a contact plate And a ball screw 41 is provided to fix a shaft casing 29 having a height adjusted. The ball plunger 40 has a male screw portion formed on an outer circumferential surface thereof, And is inserted horizontally into the flange mounting base 42 vertically installed on one side of the upper face of the flange plate 26 of the shaft casing pipe 25 so as to be inserted into one side of the outer peripheral surface of the shaft casing 29, And the ball of the ball plunger 40 is mounted on the shaft casing 29 And the position of the shaft casing 29 whose vertical height is adjusted is fixed while being inserted into and engaged with a plurality of locking grooves 36 formed at upper and lower predetermined intervals at one side of the outer circumferential surface, A fastening plate 43 fixed to the inner circumferential surface of one side and fixed to the other side of the upper surface of the flange plate 26 of the axial casing pipe 25, And one end of the fastening bolt 45 which passes horizontally and is screwed is freely rotatably connected to the center portion of the other side of the fastening plate 41 so that the fastening bolt 45 is loosened or fastened to the fastening plate 41 are moved to the left and right to be closely supported on the outer circumferential surface of the other side of the shaft casing 29 whose height has been adjusted to prevent upward and downward flows.

The flange mounting base 42 is connected to the lower flange guide base 46 in a vertically guided state so that the flange guide base 46 can move up and down. And the lower end of the height adjusting bolt 47 is rotatably connected to the upper surface of the flange guide base 46 so that the height adjusting bolt 47 is loosened or tightened The shaft casing 29 engaged by the ball plunger 40 can be adjusted to have a fine height in accordance with the working thickness of the seat ring 7 while the flange mounting base 42 is vertically elevated.

1 to 4, 6, 7, 8 and 9, the cutting groove 48 is a portion for cutting and removing the seat ring 7 of the valve 3, And a cutting bit 53 for cutting the seat ring 7 while being rotated by receiving a driving force from the rotary shaft 31. The cutting edge 48 is provided at a lower end of the shaft casing 29, And a cutting shaft 50 is rotatably inserted into one side of the cutting housing 49 so as to be perpendicular to the cutting shaft 50. The cutting shaft 50 is rotatably connected to the cutting shaft 50 at an upper end And a pulley mounting groove 52 is formed in an upper portion of the cutting housing 49. A lower driven pulley 34b and a lower driven pulley 34b axially installed at the lower end of the rotary shaft 31 and a cutting shaft 50 Are connected to each other via a belt or the like in a state in which they are positioned inside the pulley mounting groove 52, The driving force from the shaft 31 is such that rotation is transmitted to the cutting axis (50).

The cutting shaft 50 is provided so as to protrude downward from the lower portion of the cutting shaft 50 through the cutting housing 49. A cutting bit 53 having a plurality of hard metal pieces or diamond pieces is fixed to the lower end of the cutting shaft 50, The cutting bit 53 is rotated at high speed together with the rotation of the cutting shaft 50 as shown in FIG. 8, so that the wear-damaged sheet ring 7 is cut and machined from the inner diameter side to the outer diameter side As the rotary body 14 of the rotary body part 13 is rotated, the elevating and lowering rotary part 28 is rotated about the center of the rotary body 14 and the cutting edge 48 is rotated together with the rotary body 14 The inner diameter portion of the seat ring 7 abutting within the turning radius of the cutting bit 53 is cut and machined while the cutting bit 53 is revolving with the turning radius corresponding to the inner diameter of the seat ring 7, After that, the lifting / lowering turning unit 28 The inner diameter portion of the seat ring 7, which abuts within the turning radius of the cutting bit 53, is vertically cut and cut as a whole, 9, the guide block 20 is moved in the left-right direction by a predetermined distance to enlarge the turning radius of the cutting sprocket 48, so that the seat ring 7 is moved from the inner diameter side to the outer diameter side by a predetermined width So that it is gradually processed.

Hereinafter, the operation of the present invention will be described.

In the case where the seat ring 7 damaged by the wear and tear of the opening and closing valve 3 installed in the piping line of various power plants is cut and processed by using the height adjustment type cutting device 1 for a power plant valve according to the present invention, A disk member (not shown), which is lifted and lowered by a handle provided on the head portion 4 of the valve 3 to be cut, is removed and the head portion 4 of the valve 3 The mounting flange 6, which is machined to have the inside and outside diameters in accordance with the outside diameter, is assembled horizontally with the center of the mounting flange 6 The outer peripheral surface of the valve 3 is partially welded to the head portion 4 of the valve 3 so that the base body portion 2 is perpendicular to the upper surface portion of the head portion 4 of the valve 3, It shall be fixedly installed concentrically so as to coincide with the center.

A predetermined load is applied to the shaft casing 29 to move the shaft casing pipe 25 through the through holes 15 of the rotating body 14 to move the diaphragm 28 The cutting bit 53 of the cutting spindle 48 is lowered to a height corresponding to the seat ring 7 of the ball screw 39 and then the lowering movement of the shaft casing 29 is stopped, The ball of the shaft 40 is inserted into the engagement groove 36 of the shaft casing 29 formed at the corresponding height so as to maintain the temporarily engaged state and is tightened in this state by tightening the tightening bolt 45 of the shaft 39, The contact pads 43 of the shaft 41 are held in close contact with the other side of the outer circumferential surface of the shaft casing 29 so that the shaft casing 29 is fixed so as not to move up and down. The left and right adjustment bolts 21 are loosened or tightened to adjust the left and right positions of the guide block 20, The left and right positions of the lifting and pivoting portion 28 are adjusted together along the through hole 15 so that the lower end of the cutting bit 53 comes into contact with the upper end of the inner periphery of the seat ring 7 and then the driving motor 30 is operated The driving shaft 31 is rotated and the driving force from the rotating shaft 31 is transmitted to the cutting shaft 50 so that the cutting bit 53 is rotated and the seat ring 7 abutting on the cutting shaft is cut. The worm wheel 16 of the rotating body 14 which is engaged with the worm gear 11 is rotated and rotated by rotating the operating handle 12 of the worm gear mounting base 9 provided on one side of the outer circumferential surface of the main body casing 5, The lifting and rotating unit 28 provided on the inside of the rotating body 14 rotates the rotating body 14 and rotates about the center of the rotating body 14 so that the cutting bit 53 of the cutting work 48 Simultaneously with the rotation of the seat ring 7, the seat ring 7 is revolved at the same turning radius along the inner diameter thereof, The cutting process is a constant thickness and width.

After the inner diameter portion of the seat ring 7 which abuts within the radius of rotation of the cutting bit 53 is machined as described above, the bolt 45 of the fastening portion 39 is loosened and the fastening bolt 45 is fastened from the shaft casing 29 to the fastening plate 41 The height adjustment bolt 47 of the flange mounting block 42 is rotated in the forward and reverse directions to adjust the ball plunger 40 to descend to move the elevating and pivoting portion 28 downward by a predetermined distance The shaft casing 29 is tightened and fastened by the tightening plate 41 and the cutting bit 53 of the cutting spindle 48 is revolved through the rotary body 14 to rotate the inner circumference of the seat ring 7 9, after the inner diameter portion of the seat ring 7, which abuts within the turning radius of the cutting bit 53, is vertically cut as a whole, the guide block 20 is cut The turning radius of the cutting edge 48 is increased In such a way that to a certain width toward the outer diameter of the seat ring 7, an inner diameter side processing gradually cutting is removed completely cutting the fixed mounting the seat ring 7 in the plate 28 of the valve 3.

After the seat ring 7 of the valve 3 is cut off, the mounting flange 6 welded to the head portion 4 of the valve 3 is removed, The new seat ring 7 is fixedly mounted on the diaphragm 28 of the valve 3 and the maintenance work of the valve 3 is completed.

1. Cutting device 2. Base body part
3. Valve 4. Head
5. Body casing 6. Mounting flange
7. Seat ring 8. Rotating body bearing
9. Worm gear mount 10. Gear shafts
11. Worm gear 12. Operating handle
13. Rotating body 14. Rotating body
15. Through ball 16. Worm wheel
17. Finishing nut 18. Diameter control section
19. Guide rail member 20. Guide block
21. Adjustment bolt 22. Upper communication hole
23. Rail groove 24. Bolt connection
25. Axial casing pipe clearance 26. Flange plate
27. Diaphragm 28. Lift /
29. Axis casing 30. Drive motor
31. Pivot shafts 32a, 32b. Shaft bearings
33. Motor mounting plate 34a, 34b. Driven pulley
35. Driving pulley 36. Loop groove
37. Cradle 38. Coupler
39. Higher government 40. Ball plane
41. Adhering plate 42. Flange mounting base
43. Adhesive Pads 44. Adhesive Plate Mounting
45. Fastening bolt 46. Plenary guide stand
47. Height adjustment bolt 48. Cutting edge
49. Cutting housing 50. Cutting axis
51. Connecting pulley 52. Pulley mounting groove
53. Cutting bit 54. Keyway
55. Key projection

Claims (7)

A tubular main body casing 5 having upper and lower portions opened and fixed concentrically on the upper surface of the head portion 4 of the valve 3 to be cut is provided and the worm gear 11 And a cylindrical rotating body 14 rotatably coupled to the inside of the main body casing 5 and a worm wheel 16 is provided on the outer peripheral surface of the upper portion of the rotating body 14 And a guide rail member 19 fixedly installed on the upper portion of the rotary body 14 and fixed to the upper surface of the guide rail member 19, A guide block 20 is vertically upwardly and vertically upwardly inserted into the center of the guide block 20 and is guided in the left and right direction so as to be horizontally moved according to the diameter of the seat ring 7 of the valve 3, (18), an axial casing pipe (25) and a rotating body (14) in a vertically long tubular shape A lifting and rotating unit 28 provided with a shaft casing 29 installed to be adjustable in height and provided with a pivoting shaft 31 which is rotated by receiving a driving force from a driving motor 30 is provided inside the shaft casing 29, A ball plunger 40 which is installed on the upper portion of the casing pipe 25 and which is engaged with the engaging groove 36 of the outer circumferential surface of the shaft casing 29 and the urging plate 41 which is tightly supported on the outer circumferential surface of the shaft casing 29 The seat ring 7 is connected to the lower portion of the shaft casing 29 and is rotated by receiving the driving force from the rotary shaft 31 to cut the seat ring 7, And a cutting edge (48) provided with a cutting bit (53) to be machined.
2. The apparatus according to claim 1, wherein a ring-shaped mounting flange (6) having an inner diameter equal to the inner diameter of the head part (4) of the valve (3) One or a plurality of rotating body bearings 8 are installed at regular intervals on the inner circumferential surface of the body casing 5 and a rotating body 14 is inserted through the inside of the rotating body bearing 8 to be rotatable. A gear shaft 10 is rotatably installed horizontally in the front and rear of the worm gear mounting base 9 and a worm gear 11 is integrally formed on the outer circumferential surface of the gear shaft 10. The worm gear mounting base 9, And an operation handle 12 is connected to one end of the gear shaft 10 so that the worm gear 11 is rotated in accordance with the forward and reverse rotation of the operation handle 12, (16) of the rotor (14) Height adjustable cutting device for a valve.
3. The rotary compressor according to claim 1 or 2, wherein the rotary body (14) is vertically penetrated through the inside of a rotary body bearing (8) provided on the inner circumferential surface of the body casing (5) 5, a worm wheel 16 is integrally fixed to an upper outer circumferential surface protruding from the upper end portion of the rotary body 14, and a male screw portion is formed on the outer circumferential surface of the lower end portion of the rotary body 14, And a through hole 15 is vertically formed in the rotating body 14 so that the through hole 15 is formed in the left and right sides of the rotating body 14, A cylindrical shaft casing 29 having an outer diameter conforming to the longitudinal length of the through hole 15 is formed in the elongated hole so that the through hole 15 is vertically penetrated so as to be aligned with the inside of the through hole 15 Which is installed so as to be movable left and right Height adjustable cutting device for a power plant, characterized in a valve.
2. The apparatus according to claim 1, wherein the guide rail member (19) is horizontally positioned and fixed to the upper part of the rotating body (14) and rotates together with the through hole (15) of the rotating body An upper communication hole 22 having the same size and shape is perforated so as to be vertically communicated. A rail groove 23 is horizontally formed on both front and rear sides of the upper surface portion of the guide rail member 19 so that front and rear side rail grooves 23 The guide block 20 is guided in the left and right directions, and bolt fastening pieces 24 are fixedly installed on both left and right ends of the guide block 20 so as to protrude upward. The left and right bolt fastening pieces 24 are horizontally The right and left adjustment bolts 21 are inserted into the guide block 20 while being inserted into the guide block 20 while being screwed with each other so that the right and left positions of the guide block 20 are adjusted (28) Height adjustment valve for power plant, characterized in that the horizontal position is adjusted with expression cutting device.
[2] The ball screw according to claim 1, wherein the ball plunger (40) has a ball disposed at a distal end portion thereof by a spring installed therein and is elastically supported, and a male screw portion is formed on an outer circumferential surface thereof, And the ball of the ball plunger 40 is installed on one side of the outer circumferential surface of the shaft casing 29 while being inserted into the flange mounting base 42 provided on one side of the upper surface of the flange plate 26, (Not shown) is inserted into and engaged with a plurality of latching grooves 36 formed at upper and lower predetermined intervals on one side of the outer circumferential surface of the latching plate 29. The latching plate 41 is vertically erected as a plate having a rounded chevron shape, One end of the fastening bolt 45, which is horizontally threaded and fastened to the fastening plate mounting base 44 fixedly attached to the upper surface of the flange plate 26 of the shaft casing pipe 25, (41) And the tightening bolt 45 is tightened and tightened so that the tightening plate 41 is moved in the left and right direction and tightly supported on the outer circumferential surface of the other side of the shaft casing 29 whose height has been adjusted. Height adjustable cutting device for power plant valves.
6. The apparatus according to claim 5, wherein the flange mounting base (42) is connected to the lower flange guide base (46) in a state of being vertically guided and is vertically moved. The flange mounting base (42) The lower end of the height adjusting bolt 47 is connected to the upper surface of the flange guide base 46 so as to freely rotate so that the height adjusting bolt 47 is loosened And the height of the ball plunger (40) can be adjusted while the height of the flange mounting base (42) is adjusted according to the tightening.
The cutting insert according to claim 1, wherein the cutting work (48) comprises a cutting housing (49) fixed to a lower end of a shaft casing (29) by a plurality of bolts, A connecting pulley 51 is installed at the upper end of the cutting shaft 50 and a lower portion of the cutting shaft 50 is inserted through the cutting housing 49 And a pulley mounting groove 52 is formed in an upper portion of the cutting housing 49. A lower driven pulley 34b and a lower driven pulley 34b are provided at the lower end of the rotary shaft 31, The connecting pulley 51 of the cutting shaft 50 is connected to the inside of the pulley mounting groove 52 via the belt so that the driving force from the rotating shaft 31 is transmitted to the cutting shaft 50 and is rotated Height adjustable cutting device for power plant valves.
KR1020150160217A 2015-11-16 2015-11-16 The cutting machine for a power plant valve KR20170056862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
KR1020150160217A KR20170056862A (en) 2015-11-16 2015-11-16 The cutting machine for a power plant valve

Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110303170A (en) * 2019-07-14 2019-10-08 南京湛泸科技有限公司 A kind of gate valve seat ring cutter device
KR20200118708A (en) 2019-04-08 2020-10-16 주식회사 삼신 Apparatus for cutting seat ring of power plant valve
KR20210003601A (en) 2019-07-02 2021-01-12 삼신밸브기술(주) Spindle device for seat ring cutter of power plant valves

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200118708A (en) 2019-04-08 2020-10-16 주식회사 삼신 Apparatus for cutting seat ring of power plant valve
KR20210003601A (en) 2019-07-02 2021-01-12 삼신밸브기술(주) Spindle device for seat ring cutter of power plant valves
CN110303170A (en) * 2019-07-14 2019-10-08 南京湛泸科技有限公司 A kind of gate valve seat ring cutter device

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