JPH09155710A - Fitting device for steam stop valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with fitting work to a back seat or to a guide plate and to shorten the time required for valve fitting work by rotating a roller through the driving of a power source via gear trains and by rotating a valve spindle installing frame, accompanying its up-and-down motion, via an annular cam with a wave form in the vertical direction. SOLUTION: In fitting a valve spindle 4, when a roller 11 stands on the bottom-position of a cam 12, a gap between a valve spindle operating bracket 9 and a valve spindle operating bracket receiver 9a is adjusted to an appropriate dimension first, and a compound is applied to a back seat receiver 3b and to a back seat 6. Next, a gap between a valve spindle operating bracket 9 installed in a gear 8 and a receiving seat 9a for the bracket 9 is adjusted so that the gap becomes 1 to 2mm, using adjusting bolts 23, 20. When the motor 5 is driven in this state, the valve spindle 4 is rotated, accompanying its up-and- down motion, via gears 7, 8, the operating bracket 9, an installing frame 10, and a valve spindle clamp 24, and fitting work can be conducted between the back seat 6 and the back-seat receiver 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention saves labor for surface sliding work of a back sheet of a steam stop valve used in steam piping equipment of a thermal power plant or the like and sliding work of a packing surface of a guide piece. And a sliding device for the same.

[0002]

2. Description of the Related Art In thermal power plants, nuclear power plants, etc., steam stop valves are used in various places of a piping system. FIG. 8 shows a schematic structure of a valve among these, which is going to carry out the backsheet sliding operation with this apparatus. The steam stop valve 50 mainly includes a casing 51, a steam inlet pipe 52, and a steam outlet pipe 5.
3, an upper (primary side) valve mechanism 54 and a lower (secondary side) valve mechanism 55. The upper valve mechanism 54 is mainly composed of a bonnet 3, a valve body 57, a valve rod 4, and a valve seat 59 shared with the lower valve mechanism 55.

Further, a seal mechanism is provided between the valve rod 4 and the bonnet 3 to prevent steam from leaking from the gap between the bush 60 provided on the valve rod 4 and the bonnet 3. The sealing mechanism is composed of a back seat 3b provided on the bonnet 3 and a back seat 6 provided on the valve rod 4.

The valve rod 4 is driven by a hydraulic cylinder (not shown) via a crosshead 63 and a lever 64. By opening and closing the valve body 57 with respect to the valve seat 59, steam is introduced on the inlet side. It is a primary valve for leading from the to the outlet side.

By the way, the back seat 6 and the back seat 3b are formed of a hard film whose surface is nitrided, and they come into close contact when the valve body 57 is lifted and fully opened, but during long-term use. There is a risk that oxide scale and the like will adhere to the surfaces of the back seat 6 and the back seat 3b, and when the two are brought into close contact with each other when the valve is fully opened, a gap is created, steam is leaked, and the pipe is overheated. Therefore, the work of removing the oxide scale attached to the surfaces of the back seat 6 and the back seat 3b is regularly performed. The removal work of the oxide scale is performed by the back seat 6 and the back seat 3b.
It is done by sliding and.

[0006] In particular, in the work of removing the oxide scale attached to the back sheet, the bonnet 3 is conventionally inverted and set on the temporary mount 25 as shown in FIG. 9, and the bonnet 3 is placed above the inverted bonnet 3. The back seat 6 of the valve rod 4 is slid on the back seat seat 3b of the bonnet 3 by utilizing the elastic material 67 such as a spring provided on the valve rod lifting device 66 provided.

However, the above-mentioned conventional method requires two operators, and moreover, requires one operator.
It took about 12 hours for the work of sliding the individual backsheets 6, and it was also a heavy labor requiring a considerable amount of work by the operator.

Further, in the steam stop valve, in addition to the sliding work between the back seat and the back seat as described above, it is necessary to perform the sliding work between the guide piece and the guide piece packing surface. is there. FIG. 10 is a cross-sectional view showing a schematic structure of a steam stop valve for performing a sliding operation between the guide piece and the guide piece packing surface. Steam stop valve 68
Is mainly composed of a casing 69, a steam inlet pipe 70, a steam outlet pipe 71, an upper (primary side) valve mechanism 72, and a lower (secondary side) valve mechanism 73.

The upper valve mechanism 72 is mainly composed of the bonnet 7
4, a valve body 75, a valve rod 76, and a valve seat 77 shared with the lower valve mechanism 73. Valve stem 76 and bonnet 74
A seal mechanism for preventing steam from leaking from a gap between the valve rod 76 and the bush 78 provided on the bonnet 74 is provided between them. This sealing mechanism is a bonnet 74
And a back seat 79 provided on the valve rod 76. The valve rod 76
Is driven by a hydraulic cylinder (not shown) via a crosshead 80 and a lever (not shown). By opening and closing the valve body 75 with respect to the valve seat 77, steam is introduced on the inlet side. It is a primary valve for leading from the to the outlet side.

The lower valve mechanism 73 is mainly composed of the valve body 8
1, a valve rod 82, and a cylindrical guide piece 83.
A seal mechanism for preventing vapor leakage is provided between the valve rod 82 and the guide piece 83. The sealing mechanism is composed of a back seat seat 83 b provided on the guide piece 83 and a back seat 84 provided on the valve rod 82.

A large diameter portion 83c is formed on the proximal end side of the guide piece 83, and a guide piece packing surface 87 which is a horizontal portion of the stepped portion 85 formed on the large diameter portion 83c has a mild steel packing (not shown). ) Via the valve box piece 8 at the lower end of the casing 69.
6 is pressed against the contact surface 86b of the shallow circular recess 86a. The circular concave portion 86a has a diameter corresponding to the outer diameter of the large diameter portion 83c of the guide piece 83.

The valve box piece 86 constitutes a part of the lower end portion of the casing 69, and oxide scale or the like adheres to the guide piece packing surface 87 during long-term use so that the guide box packing surface 87 and There is a risk that a gap may be created between the packing and the steam leaking through the gap to the outside of the steam stop valve, which may cause a danger. Therefore, the work of removing the oxide scale adhering to the guide piece packing surface 87 of the guide piece 83 and performing sliding is performed regularly.

Then, the work of removing the oxide scale adhering to the guide piece packing surface 87 and the work of sliding are conventionally performed as shown in FIG.
As shown in FIG. 1, the guide piece 83 is inverted, and the surface plate 88 to which the sand paper is attached is slid on the guide piece packing surface 87 from above the inverted guide piece 83. As shown in FIG. 12, an annular surface plate 88
A plurality of sandpapers 89 are radially attached to one side surface, and a grip 90 is attached to the other side surface.

Details of the conventional guide piece sliding procedure will be described below.

(I) The scale of the guide piece 83 is taken.

(Ii) A # 80 sandpaper 89 is attached to the lower surface of the guide piece sliding surface plate 88.

(Iii) As shown in FIG. 13, the sandpaper surface is applied to the guide piece 83, and the grip 90 is held by hand and reciprocally rotated in the arrow direction.

(Iv) Replace the sandpaper 89.

(V) Follow steps (ii) to (iv) for 2-3 steps.
Repeat times.

(Vi) Peel off the sandpaper 89.

(Vii) Wash the surface plate 88 and apply red paint.

(Viii) The surface plate 88 is applied to the guide piece 83, and the contact is checked.

(Ix) If there is no hit, the steps (ii) to (iv) are repeated and the hit check is performed again. If there is a hit, use # 200 sandpaper to finish hitting, using the procedure (i
The same procedure as i) to (viii) is performed.

Further, as shown in FIG. 14, the work of sliding the guide piece 83 and the valve box piece 86 is the same as the surface plate 88 used in the guide piece sliding work.
The contact surface 96b of No. 6 is polished.

The details of the guide piece sliding procedure are also the same as the above-mentioned guide piece sliding procedures (i) to (ix).

The inner diameter D1 of the surface plate 88 is equal to the guide piece 83.
Is slightly larger than the diameter d1 of the small-diameter portion of the stepped portion 85, the outer diameter D2 of the surface plate 87 is larger than the diameter d2 of the large-diameter portion of the stepped portion 85 of the guide piece 83, and of the valve box piece 86. It is slightly smaller than the outer shape d3 of the contact surface 96b.

Furthermore, as shown in FIG. 15, the guide piece 8
It is also necessary to perform a sliding operation between the back seat seat 83b provided on the No. 3 and the back seat 84 provided on the valve rod 82.

The operation of sliding the guide pieces by the above-mentioned conventional method requires two operators, and the work is very complicated. I was spending about time. Also, the surface plate 88 used for the sliding work is 10 kg even if it is small
It was only a degree, and it was a heavy labor that required a considerable amount of labor by the workers.

[0029]

SUMMARY OF THE INVENTION In view of the above problems, the present invention saves labor for sliding backsheets and guide pieces to shorten the working time and the labor of workers. An object of the present invention is to provide a lapping device capable of saving labor.

[0030]

SUMMARY OF THE INVENTION The present invention is a steam stop valve sliding device for bringing a back seat formed on a valve stem of a steam stop valve into close contact with a back seat.
A power source provided on a base frame that holds the back seat, a first gear provided on an output shaft of the power source, a second gear that meshes with the first gear, and a second gear.
A roller that is integrally provided on the gear of FIG. 6 and that rotates about a horizontal shaft as a support shaft; a horizontally-shaped ring-shaped cam that is fixedly mounted on the base frame side and has a waveform in the vertical direction; One end of which is mounted on a gear and is rotated, and a valve rod mounting frame that is vertically moved by the roller rotating following the cam, and the valve rod mounting frame is vertically adjustable mounted on the valve rod mounting frame. A valve rod actuating frame and the valve rod that is connected to the valve rod actuating frame and rotates and moves up and down are provided.

In the present invention, by driving the power source provided on the base frame, the first gear provided on the output shaft of the power source and the second gear meshing with the gear are rotated, and the first gear is rotated. When a roller integrally provided with the second gear rotates, it moves through a ring-shaped cam having a waveform in the vertical direction,
A valve rod mounting frame, one end of which is mounted on the second gear, rotates while moving up and down, a valve rod operating frame mounted on the valve rod mounting frame, and a valve connected to the valve rod operating frame. The bar rotates while moving up and down to perform the back sheet surface sliding operation.

The present invention also provides a steam stop valve sliding device for bringing a back seat of a valve stem of a steam stop valve into close contact with a back seat seat of a guide piece for slidably supporting the valve stem. There is a guide piece supporting jig for holding the guide piece, a power source commonly provided to the frame body to which the guide piece supporting jig is attached, and a first shaft provided on an output shaft of the power source.
, A second gear that meshes with the first gear, a roller that is provided integrally with the second gear and that rotates about a horizontal shaft as a support shaft, and is fixed to the frame body side. A horizontally placed ring-shaped cam having a wave shape in the vertical direction, one end of which is fixed to the second gear, the other end of which holds the valve rod, and the roller rotates following the cam. And a valve rod clamp that moves up and down by the operation. Further, according to the present invention, one end of the surface is fixed to the second gear, the other end supports a processing surface plate, and the surface plate support arm is moved up and down by rotating the roller following the cam. The machining platen is further provided at the other end of the platen support arm so as to be movable in the vertical direction and swingably, and is in contact with a packing surface of the guide piece.

In the present invention, by driving the power source commonly provided to the frame body to which the guide piece support jig is attached,
When the first gear provided on the output shaft of the power source and the second gear meshing with the gear rotate, and the roller integrally provided on the second gear rotates, the first gear moves vertically. One end of which is fixed to the second gear via a ring-shaped cam having a waveform, and the other end of which is rotated while vertically moving a valve rod clamp holding the valve rod, and is attached to this valve rod clamp. The valve stem rotates while moving up and down to perform the backseat surface sliding operation.

At the same time, the rotation of the second gear is transmitted to the working surface plate via the surface plate support arm. At this time, the surface plate support arm moves up and down as the roller rotates following the cam, but the processing surface plate is supported at the other end of the surface plate support arm so as to be movable in the vertical direction. The surface plate itself does not move up and down.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to an embodiment shown in the drawings. FIG. 1 is a front view of a sliding device showing an embodiment of the present invention. As shown in the drawing, the sliding device 1 includes a base frame 2 fixed to a hood 3 installed on a temporary mount 25 and inverted.
The frame 5 includes a motor 5 and a valve rod 4 mounted on the frame.

A seal mechanism is provided between the insertion hole 3a of the bonnet 3 and the valve rod 4 to prevent vapor leakage from the gap between the valve rod 4 and the bush provided on the bonnet 3. This sealing mechanism is composed of a back seat 3 b provided on the bonnet 3 and a back seat 6 provided on the valve rod 4. Further, the motor 5 serves as a power source for performing the sliding work, and a worm geared motor is used in this embodiment. A gear 7 having a large tooth thickness is horizontally provided on an output shaft vertically projecting from the motor 5, and a gear 8 for rotationally driving the valve rod 4 is meshed with the gear 7. Further, inside the gear 8, there is provided a valve rod actuation bracket receiver 9a for transmitting the operation of the gear 8 to the valve rod 4. This valve rod operating bracket 9
Has a structure only fitted into a concave portion (valve rod actuation bracket receiver 9a) inside the gear 8 in order to release the misalignment between the valve rod 4 and the gear 8. A valve rod mounting frame 10 is integrally provided on the valve rod operating bracket 9.

A roller 11 having a horizontal shaft as a support shaft is mounted on the gear 8 and the roller 11 is mounted on a cam 12 provided on a horizontal plate. This cam 12 is placed horizontally, and its surface is processed into a wavy shape.
It is provided in a ring shape around the valve rod 4. When the roller 11 rotates following the waveform on the surface of the cam 12, the gear 8 rotates, and at the same time the roller 11 rotates according to the waveform on the surface of the cam 12,
The valve rod 4 is adapted to rotate up and down via the valve rod actuation bracket 9 and the valve rod mounting frame 10. The vertical stroke of the valve rod 4 can be adjusted within the range of the height of the peaks and valleys of the cam 12.

Therefore, as the gear 7 rotates, the gear 8 and the valve rod 4 move up and down and rotate, so that the back seat 6 and the back seat 3b can be slid together, and As described above, the gear 7 has a large tooth thickness.

The gear 8 is connected to the cam 1 via a roller 11.
Since the structure is only mounted on No. 2, this gear 8
A radial vibration force acts on the. Therefore, this gear 8
In order to prevent radial runout of the sleeve 13
Is provided on the gear 8 side, and a stopper 14 is provided on the cam 1
It is provided on the 2 side.

Horizontal frame 1 provided with the cam 12
5, an opening 15a is formed inside the opening 5.
A centering jig 16 is provided in the gap between the valve rod mounting frame 10 and a. In addition, the base frame 2
A frame 17 is fixedly mounted on the frame 17.
The horizontal frame 15 is mounted on the table so as to be horizontally movable. Then, the cam centering bolt 18 is attached to the frame 1 via a bracket fixed to the end of the horizontal frame 15.
It is provided so as to hit the side wall of 7. The centering jig 16 and the cam centering bolt 18 are provided to correct a significant misalignment between the gear 8 and the valve rod 4, and the centering jig 16 is a centering jig. It is designed to be removed after the work is completed.

Inside the valve stem mounting frame 10, a frame 10a fixed to the valve stem mounting frame 10, a valve stem actuation frame 19 for adjusting the vertical stroke of the valve stem 4, and a valve stem actuation. A frame adjusting bolt 20, a valve rod actuating frame mounting bolt 21, a valve rod actuating frame adjusting sleeve 22, a valve rod actuating frame adjusting bolt 23, and a valve stem clamp 24 are provided, and the valve stem clamp 24 is a valve stem. Actuating frame adjustment bolt 2
3, the valve rod operating frame adjusting sleeve 22, the valve rod operating frame 19, and the valve rod operating frame mounting bolt 21 are connected to the valve rod operating frame adjusting bolt 20.

In the sliding device 1 according to the embodiment of the present invention configured as described above, when the motor 5 is driven to rotate the gear 7, the gear 8 rotates and the roller 11 forms a corrugated surface. It rotates on the cam 12 that it has. By rotating the roller 11 while moving up and down, the valve rod 4 rotates while moving up and down through the valve rod actuation bracket 9 and the valve rod mounting frame 10, and the back seat seat 3b of the bonnet 3 is rotated. Sliding work of the back seat 6 and the back seat 3b is performed between the valve rods 4.

Next, an explanation will be given of how to perform the valve rod sliding operation using this apparatus.

(1) Valve rod actuating frame adjusting bolt 20,
Valve rod operating frame adjusting bolt 23, valve rod operating frame adjusting sleeve 22, and valve rod operating frame mounting bolt 2
1 is adjusted so that when the roller 11 is at the position of the valley of the cam 12, the valve stem actuation bracket 9 and the valve stem actuation bracket receiver 9
The gap a is set to have an appropriate size, and a compound is applied to the back seat 3b on the bonnet 3 side and the back seat 6 on the valve rod 4 side.

(2) The cam 1 for adjusting the centering jig 16 and the cam centering bolt 18 to operate vertically.
Perform centering work of 2.

(3) As shown in FIGS. 2 and 3, when the roller 11 is at the position of the valley of the cam 12, the seat 9a of the valve rod actuating bracket 9 provided on the gear 8 and this bracket 9 are provided. The gap is adjusted by the valve rod actuation frame adjustment bolts 23 and 20 so that the gap becomes 1 to 2 mm. Here, the relationship between the valve rod stroke e and the valve rod drive gear stroke E is e <E. Stroke E is for up / down operation cam 12
The stroke e is adjusted and determined by the valve rod actuation frame adjustment bolt 20, the valve rod actuation frame adjustment sleeve 22, and the valve rod actuation adjustment bolt 23.

(4) The motor 5 is driven.

By the simple operation as described above, the motor 5
When driven, the gear 7, gear 8, valve stem actuation bracket 9, valve stem mounting frame 10, and valve stem clamp 2
The valve rod 4 is rotated while moving up and down through 4, and a sliding operation is performed between the back seat 6 and the back seat 3b.

In addition, by equipping the operation panel (not shown) with a timer and automatically stopping after an arbitrary set time,
It is also possible to prevent the occurrence of galling due to the out-of-compound of the backsheet.

Next, a second embodiment of the sliding device of the present invention will be described. The second embodiment is such that sliding between the back seat and the back seat, and the back seat,
At the same time, the guide pieces for slidably supporting the valve rod are slid together with the back seat.

FIG. 4 is a schematic front view showing the overall construction of the sliding device of the second embodiment. At the top of the frame 91,
A hoisting device 92 for hoisting a part 68a of the steam stop valve 68, which is a target of the rubbing work, is arranged, and a rubbing device 93 for rubbing the guide pieces is arranged below the frame 91. Has been done. The sliding device 93 includes a processing surface plate 94 which is a guide piece sliding jig, as described later.

FIG. 5 shows the sliding device 93 shown in FIG.
It is a partial cross-sectional view showing the main part of. Further, FIG. 6 is an explanatory view showing the principle configuration of the sliding device 93. As shown in the drawing, the sliding device 93 is a processing surface plate 9 that is a jig for sliding guide pieces for sliding the guide pieces 83.
4, a guide piece support jig 95 for supporting the outer periphery of the guide piece 83 with the valve rod 82 inserted, and a work surface plate support arm for transmitting the rotation of the rotary plate 96 to the work surface plate 94 via the rotary motion transmission pin 97. 98, a motor 99 for applying a rotational force to the rotary plate 96, an intermediate gear 100 (not shown in FIG. 5), and the large gear 1
01, valve stem clamp 1 for holding the end of valve stem 82
02 etc. are provided. The processing surface plate support arm 98 is
As shown in FIG. 7, a leaf spring 98 a extending in the axial direction of the valve rod 82, and an L-shaped attachment member fixed to one end of the leaf spring 98 a for attaching the working surface plate support arm 98 to the rotary plate 96. 98b and a supporting member 98 fixed to the other end of the leaf spring 98a and swingably supporting the machining surface plate 94 via a rotary motion transmitting pin 97 having a small diameter bearing 97a.
c.

A pair of long grooves 94a extending in the axial direction are formed at positions opposed to each other in the diametrical direction of the work surface plate 94, and the rotary motion transmitting pin 9 is formed in the long groove long grooves 94a.
The small-diameter bearing 97a of No. 7 is fitted so as to be movable in the vertical direction.

A roller 103 having a horizontal shaft as a support shaft is mounted on the large gear 101.
Are mounted on a cam 104 provided on the horizontal plate. The cam 104 is placed horizontally, its surface is corrugated, and is provided in a ring shape around the valve rod 82. When the roller 103 rotates following the waveform on the surface of the cam 104, the large gear 101 rotates, and at the same time, the roller 103 rotates according to the waveform on the surface of the cam 104, whereby the large gear 101 rotates. The rotary plate 96, the valve rod clamp 102, the working surface plate support arm 98, and the valve rod 82 fixed to the above are rotated while moving up and down. The vertical stroke of the valve rod 82 can be adjusted within the range of the height of the peaks and valleys of the cam 104. The large gear 101 has a large tooth thickness so that the rotational force can be transmitted even when the large gear 101 moves up and down.

Next, the operation of the above-mentioned sliding device will be described.

In the sliding device 93 shown in FIG. 4, the rotating plate 9 shown in FIG.
6 is lifted, the valve rod clamp 102 is used to lift the valve rod 82.
Since the processing surface plate supporting arm 98 is lifted, it is moved to a desired position in this state.

Next, the motor 99 is driven to drive the intermediate gear 1
When 00 is rotated, the large gear 101 rotates and the roller 1
03 rotates on a cam 104 having a corrugated surface. By rotating the roller 103 while moving up and down, the rotating plate 96 fixed to the large gear 101, the valve rod clamp 102, the working surface plate support arm 98, and the valve rod 82 rotate up and down to guide. A backseat seat 83b provided on the piece 83 and a backseat 84 provided on the valve rod 82.
Sliding work is performed between the two.

At this time, the machining surface plate support arm 98 also moves up and down as described above. However, since the machining surface plate 94 has grooves formed in the vertical direction, the machining surface plate support arm 98 moves vertically. Regardless, the processing surface plate 94 is always in contact with the guide piece packing surface 87 of the guide piece 83. Therefore, the guide piece packing surface 87 is ground by the sandpaper attached to the lower surface of the processing surface plate 94, and the guide pieces 83 are slid together. At this time, since the machining surface plate 94 is supported by the machining surface plate support arm 98 having the leaf spring 98a so as to be movable in the direction orthogonal to the axial direction, the shaft center of the large gear 101 and the shaft of the guide piece 83. Even if the core is deviated, the machining surface plate 94 moves in the direction orthogonal to the axial direction following the guide piece 83, so that the axis of the machining surface plate 94 is automatically aligned with the axis of the valve rod 82. Therefore, the guide piece packing surface 87 is surely slid.

[0059]

As described above, the present invention has the following effects.

(1) Since it is possible to automate the back sheet sliding work and the guide piece sliding work,
The work that required a total of 24 to 32 hours for each of the two workers by two workers can now be done in 6.5 to 8 hours.

(2) The labor required for the sliding work is
Compared to the conventional manual work, it is significantly reduced.

(3) Since the work can be automated, manpower is not required and labor can be saved, and the work that conventionally required two workers can now be done by one person.

[Brief description of the drawings]

FIG. 1 is a front view of a sliding device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a sliding mechanism portion.

FIG. 3 is a side view of a main part as seen from the direction A in FIG.

FIG. 4 is a schematic front view showing the overall configuration of a sliding device according to a second embodiment.

5 is a partial cross-sectional view showing a main part of the sliding device shown in FIG.

FIG. 6 is an explanatory diagram showing a principle configuration of a sliding device.

FIG. 7 is a perspective view showing a processing surface plate and a processing surface plate supporting arm.

FIG. 8 is a front view of a steam stop valve in a conventional example.

FIG. 9 is a front view of a sliding operation state in a conventional example.

FIG. 10 is a cross-sectional view showing a schematic structure of a steam stop valve for performing a sliding operation between a guide piece and a guide piece packing surface.

FIG. 11 is an explanatory diagram showing a conventional oxide scale removing work and a sliding work.

FIG. 12 is a perspective view showing a surface plate used in a conventional oxide scale removing operation and a sliding operation.

FIG. 13 is an explanatory diagram showing a conventional guide piece sliding procedure.

FIG. 14 is an explanatory view showing a work of sliding the guide piece and the valve box piece together.

FIG. 15 is an explanatory diagram showing a sliding work between the back seat and the back seat 84.

[Explanation of symbols]

1 ... Sliding device, 2 ... Base frame, 3 ... Bonnet, 3a ... Insertion hole, 3b ... Back seat, 4 ... Valve rod,
5 ... Motor (power source), 6 ... Back seat, 7 ... Gear (first gear), 8 ... Gear (second gear), 9 ... Valve rod operating bracket, 9a ... Valve rod operating bracket receiver, 10 ... Valve stem mounting frame, 11, roller, 12 ... Cam, 13
… Sleeve, 14… Stopper, 15… Horizontal frame,
15a ... Opening part, 16 ... Centering jig, 17 ... Frame,
18 ... Cam centering bolt, 19 ... Valve rod operating frame,
20 ... Valve rod operating frame adjusting bolt, 21 ... Valve rod operating frame mounting bolt, 22 ... Valve rod operating frame adjusting sleeve, 23 ... Valve rod operating frame adjusting bolt, 24 ... Valve rod clamp, 25 ... Temporary mount, 50 ... Steam stop valve, 51 ... Casing, 52 ... Steam inlet pipe, 53 ... Steam outlet pipe, 54
... Upper valve mechanism, 55 ... Lower valve mechanism, 57 ... Valve element, 59 ...
Valve seat, 60 ... Bushing, 63 ... Crosshead, 64 ... Lever, 66 ... Valve rod lifting device, 67 ... Elastic material, 68 ...
Steam stop valve, 69 ... Casing, 70 ... Steam inlet pipe, 7
1 ... Steam outlet pipe, 72 ... Upper (primary side) valve mechanism, 73 ...
Lower (secondary side) valve mechanism, 74 ... Bonnet, 75 ... Valve body, 76 ... Valve rod, 77 ... Valve seat, 78 ... Bush, 74b
Back seat seat 79 Back seat 80 Cross head 81 Valve disc 82 Valve stem 83 Guiding piece 83
b ... back seat, 84 ... back seat, 85 ... step, 86 ... valve box piece, 87 ... guide piece packing surface, 88 ... surface plate, 89 ... sand paper, 90 ... handle, 91 ... frame, 9
2 ... Lifting device, 93 ... Sliding device, 94 ... Guide piece sliding jig, 95 ... Guide piece supporting jig, 96 ... Rotating plate,
Reference numeral 97 ... Rotational motion transmitting pin, 98 ... Processing surface plate support arm, 99 ... Motor, 100 ... Intermediate gear, 101 ... Large gear, 102 ... Valve rod clamp, 103 ... Roller, 104 ...
cam

Claims (3)

[Claims] 1. A sliding device of a steam stop valve for bringing a back seat formed on a valve rod of the steam stop valve into close contact with a back seat, which is provided on a base frame for holding the back seat. Power source, a first gear provided on the output shaft of the power source, a second gear meshing with the first gear, and a horizontal shaft supported integrally with the second gear. A roller that rotates about an axis, a ring-shaped cam that is fixedly installed on the base frame side and has a wave shape in the up-down direction, and one end of which is mounted on the second gear and rotates. And,
A valve rod mounting frame that moves up and down when the roller rotates following the cam, a vertically adjustable valve rod operating frame that is mounted on the valve rod mounting frame, and is connected to the valve rod operating frame. And a valve rod that rotates and moves up and down. 2. A steam stop valve sliding device for bringing a back seat of a valve stem of a steam stop valve into close contact with a back seat seat of a guide piece that slidably supports the valve stem, A guide piece supporting jig for holding the guide piece; a power source commonly provided to the frame body to which the guide piece supporting jig is attached; a first gear provided on an output shaft of the power source; A second gear that meshes with the first gear, a roller that is provided integrally with the second gear and that rotates about a horizontal shaft as a support shaft, is fixed to the frame body side, and has a wavy shape in the vertical direction. A horizontally placed ring-shaped cam, one end of which is fixed to the second gear, the other end holds the valve rod, and the roller moves up and down by rotating along the cam. Of a steam stop valve, characterized in that Location. 3. One end of the second gear is fixed to the second gear,
A surface plate support arm whose other end supports the processing surface plate and which moves up and down when the roller rotates following the cam, and at the other end of the surface plate support arm, is movable vertically. The sliding device for the steam stop valve according to claim 2, further comprising: the processing surface plate that is swingably supported and abuts on a packing surface of the guide piece.