JPH08126949A - Valve seat fitting device - Google Patents

Abstract

PURPOSE: To provide the valve seat fitting device which facilitates mounting, removal and adjustment for the position of a fitting surface plate while the whole of the device is being stably and surely supported, shortens working hours, and improves its operating performance.∥CONSTITUTION: A base 2 to be engaged with a closure engaging section 34 at the top of a gate valve valve box 32 is provided with an opening section, a support block 10 is installed onto a frame 12 to be inserted into the opening section in such a way that it can be slid in the longer direction, and it is fixed by a fastening bolt 11. A pivot shaft 9 is screwed in the support block 10 so as to be rotatably supported by a bearing 5. The bearing 5 is installed onto the base 2 in such a way that it can be slid. A driven side sprocket 15 and a fitting surface plate 14 are rotatably installed at the lower end of frame 12, and the rotation of a motor 20 installed on a motor support fixture 18 at the upper end of the frame 12, is transferred to the fitting surface plate 14 by the driven side sprocket and a chain 16, so that a valve seat 33 is thereby ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve seat sliding device for sliding and repairing valve seats of large sluice valves used for steam pipes, gas pipes and the like.

[0002]

2. Description of the Related Art A sluice valve such as a wedge sluice valve and a parallel slide valve is mainly composed of a valve body, a valve seat, a valve box, a lid for supporting a valve rod for moving the valve body up and down, a valve body up-and-down moving mechanism and others. ing. FIG. 15 is a sectional view showing the structure of the sluice valve. The valve box 32 has a conduit and a valve seat 33 on the lower portion, and a flange portion and a lid fitting portion 3 for attaching a lid 35 on the upper portion.
There are four. The lid 35 is fitted to the valve box 32 at a fitting portion 34 while supporting a valve rod 37 that moves a valve element 36 up and down. In the above-mentioned valve, the valve body 36 and the valve seat 33 are brought into close contact with each other to maintain airtightness. However, when the valve seat 33 is worn out, the airtightness is deteriorated. Therefore, the sliding repair of the valve seat 33 is regularly performed. In the conventional valve seat sliding device, after removing the lid / valve of the sluice valve, the sliding surface plate is inserted into the valve box, and part of the device is bolted or clamped to the flange on the upper part of the valve box. While mounting and ensuring the stability of the device, the sliding surface plate is rotated by the drive unit located outside the valve box to slide the valve seat (for example,
See Japanese Utility Model Laid-Open No. 56-24545). In order to perform stable fixing on the flange with such a conventional device, the fixing portion corresponding to the flange of the device is inevitably large, which hinders the weight reduction of the entire device and the loading / unloading of the device. It was a cause of requiring a lot of labor and time when mounting. In addition, since the mechanism for adjusting the position of the sliding surface plate is movable only in the vertical direction and tilt, if the position adjustment of the surface plate does not match, it is necessary to remove the device from the valve box and move it.
This was also a waste of labor and time. In the case of the bolted structure, in particular, there were many restrictions because it could not be fixed unless the holes on the device side and the valve box flange side were aligned.

[0003]

The problem to be solved by the present invention is to solve the above-mentioned problems and to facilitate the mounting / removal and the adjustment of the position of the lapping surface plate while ensuring stable support of the apparatus. Another object of the present invention is to provide a valve seat sliding device that shortens working time and improves workability.

[0004]

The structure of the present invention which has solved the above-mentioned problems is as follows: 1) A circular valve which is rotatably fitted to a fitting portion with a lid for supporting a valve rod on an upper portion of a valve box of a sluice valve. An opening is provided in the center of the base, an elongated frame is inserted into the opening, a support block is attached so that the position of the support block can be adjusted in the longitudinal direction of the frame, and a shaft support portion that rotatably supports the support block on the base is provided. The base is slidably attached to the base, a sliding surface plate is rotatably attached to the lower end of the frame, and a surface plate rotation drive unit is provided at the upper end of the frame. The driving force of the drive unit is applied to the sliding surface plate. 2) A valve seat sliding device having a transmission mechanism provided on a frame 2) The valve seat sliding device according to 1), wherein a drive source such as an air motor or an electric motor is used for the drive unit 3) The drive unit uses a crank handle Used by hand Wherein 1) using the 1) seat sliding fit device 4 according) endless chain to the transmission mechanism is a mechanism that,
2), 3) the valve seat sliding device according to any one of 5), wherein the frame is tubular, a shaft is passed through the inside of the frame, and the driving force from the driving unit is transmitted to the sliding surface plate by the shaft. ), 2), 3) any one of the valve seat sliding device. As the drive unit of the sliding device, an air motor, an electric motor, a crank handle for manual rotation, or a hydraulic motor may be used. As a transmission mechanism for transmitting the rotation from the drive unit to the sliding surface plate, a belt, a wire, or a combination of a plurality of these can be used in addition to the endless chain and the shaft.

[0005]

In the sliding device of the present invention, after removing the lid and the valve body from the valve box, the sliding platen at the lower end of the mounting frame is inserted into the valve box, and the base is used as the lid fitting portion at the upper part of the valve box. Mating. Since the base is constrained by the fitting surface, stable support of the device is ensured. Since the rotation of the base is not restricted by the lid fitting portion, the entire device is rotated to align the sliding surface plate with the direction facing the valve seat. Move the frame up and down with respect to the support block to adjust the vertical position of the surface plate and hold it at an appropriate position. Next, slide the shaft support to adjust the front-back position of the surface plate, and then fix it to the base. Then, after changing the tilt of the frame around the shaft support axis and adjusting so that the angle between the surface plate and the valve seat surface will match, while pushing with a predetermined pressure by the device's own weight or human power, the drive source or manual crank handle Is operated, the surface plate is rotated via a transmission mechanism such as an endless chain or a shaft, and the valve seats are slid on the surface plate. After finishing sliding, take out the device in the reverse order.

[0006]

Embodiments 1 and 2 of the present invention will be described with reference to the drawings. The first embodiment shown in FIGS. 1 to 10 is an example of a valve seat sliding device that uses a motor or a manual rotation as a drive source and uses a chain as a transmission mechanism. Example 2 shown in FIGS. 11 to 13 is an example of a valve seat sliding device using a shaft for a transmission mechanism. 1 is a front view showing the first embodiment, FIG. 2 is a left side view showing the first embodiment, FIG. 3 is a plan view showing the first embodiment, and FIG.
1 is an enlarged sectional view taken along the line AA of FIG. 1, FIG. 5 is an enlarged sectional view taken along the line BB of FIG. 3 showing the frame tilt adjusting operation of the first embodiment, and FIG. 6 is an enlarged sectional view taken along the line CC of FIG. FIG. 8 is an explanatory view of the slide operation of the shaft support portion of the first embodiment, FIG. 8 is an explanatory view of the frame vertical position adjusting operation of the first embodiment, FIG. 9 is a front view showing another example of the drive portion of the first embodiment, and FIG. 11 is a side view showing another example of the drive unit of FIG. 1, FIG. 11 is a side view showing a second embodiment, FIG. 12 is an enlarged sectional view taken along line DD of FIG. 11, and FIG. 13 is an enlarged sectional view taken along line EE of FIG. is there.

Embodiment 1 (see FIGS. 1 to 10) A valve seat sliding device 1 has a base 2 that fits into a lid fitting portion 34 on an upper portion of a valve box 32. The base 2 is provided with an opening 3 into which the elongated frame 12 is inserted and a bearing mounting groove 4. A frame-shaped support block 10 is attached to the frame 12 inserted into the opening 3 so as to be slidable in the longitudinal direction of the frame 12 within a range restricted by the tightening bolt penetrating elongated hole 13. Fix at 11. Support block 10
A pivot shaft 9 is screwed to the shaft and is rotatably supported by the bearing 5 to form a shaft supporting portion. A spacer 8 is attached to the pivot shaft 9 to prevent unnecessary movement of the frame 12 in the axial direction of the shaft support portion. The bearing 5 is slidably fitted in the bearing mounting groove 4 and is fastened to the bearing fixing jig 7 with bolts 6. On the lower end of the frame 12, a driven side sprocket 15 that also serves as a mounting portion of the sliding surface plate 14 is rotatably mounted. The sliding surface plate 14 is attached to the end of the driven sprocket 15. A motor 20 is attached to a motor support 18 provided on the upper end of the frame 12, and the shaft of the motor 20 is directly connected to the drive side sprocket 17. Rotation is from the drive side sprocket 17 to the driven side sprocket 15 by the chain 16.
Conveyed to. As another example of the drive unit, the one in which the motor support 18 at the upper end of the frame 12 is removed and the crank handle 21 is attached to the drive side sprocket 17 to enable manual drive is shown.

When the valve seat sliding device 1 is used, after removing the lid 35, the valve body 36, etc. from the valve box 32, the sliding table 14 at the lower end of the frame 12 is inserted into the valve box 32, and the base 2 is covered. When fitted in the fitting portion 34, the valve seat sliding device 1 is stably supported. Fitting part 3 that covers the entire valve seat sliding device 1
It rotates with respect to 4, and the sliding surface plate 14 is faced to the valve seat 33. The frame 12 is moved in the vertical direction with respect to the support block 10 to adjust the vertical position of the sliding surface plate 14, and the tightening bolts 11 are tightened at appropriate positions to draw the front and back portions of the support block 10 together to draw the frame. It is crimped to 12 and fixed. Next, slide the shaft support to the base 2,
After adjusting the front-back position of the sliding surface plate 14, the bolt 6 is tightened and fixed. After adjusting the inclination of the frame 12 around the axis of the shaft support, the motor 20 or the crank handle 21 is operated while pressing the sliding surface plate 14 against the valve seat 33, and the drive side sprocket 17, the chain 16 and the driven side sprocket 15 are moved. The sliding surface plate 14 is rotated via the sliding table 14 to slide the valve seat 33.

In the first embodiment, by preparing a base having a different diameter in which the opening 3 of the base 2 and the bearing mounting groove 4 are common, the valve seat sliding device 1 can be applied to more valve boxes. . In addition, the motor drive and manual operation can be selected according to the work content, so that it is possible to flexibly respond to the situation. In addition, since the mounting positions of the motor 20 and the crank handle 21 can be selected from both the front side and the rear side of the frame, a convenient working position can be secured.

Embodiment 2 (see FIGS. 11 to 13) The base 2 and the bearing 5 have the same structure as in Embodiment 1. In the second embodiment, the frame 22 is an elongated tube, and the support block 2
4 and the tightening jig 25 so as to be slidable in the vertical direction, and fixed by a set screw 26. A pivot shaft 9 having a spacer 8 attached thereto is attached to the support block 24 as in the first embodiment, and is pivotally supported by a bearing 5 to form a shaft support portion. A shaft 23 penetrates inside the frame 22.
The rotation from the air motor 30 is transmitted to the sliding surface plate 14. A drive-side bevel gear 27 attached to the shaft 23 and a driven-side bevel gear 28 and a driven-side bevel gear 28 that also mesh with the drive-side bevel gear 27 and rotatably support the drive-side bevel gear 27 at the lower end of the frame 22. An axis part 29 is provided.

As for the method of use, the sliding surface plate 14 is inserted into the valve box 32 in the same manner as in the first embodiment, and the base 2 is fitted into the lid fitting portion 34 at the upper part of the valve box, and the sliding surface plate 14 is inserted. Face the valve seat. The frame 22 is moved up and down with respect to the support block 24 and the tightening jig 25 to make the vertical position of the sliding surface plate 14 proper, and then the set screw 26 is tightened to tighten the frame 22 with the support block 24. Press on 25 and fix. Next, as in the first embodiment, the sliding surface plate 14 is mounted on the shaft supporting portion.
Adjust and fix the front and rear positions of. When the air motor 30 is operated while pressing the sliding surface plate 14 against the valve seat 33 after adjusting the inclination of the frame 22 around the shaft support axis, the shaft 23
The sliding surface plate 14 rotates via the driving-side bevel gear 27 and the driven-side bevel gear 28 to slide the valve seat 33. In the second embodiment, since the frame 22 is rotatable around the tube center of the frame 22 with respect to the support block 24 and the tightening jig 25, the degree of freedom in adjusting the position of the surface plate can be further increased. Adjustment becomes easy.

[0012]

Since the present invention is configured as described above, it has the following effects. Only by fitting the base of the valve seat sliding device to the lid fitting portion on the upper portion of the valve box, the entire device is stably held, and no installation tool is required. In addition, when the sliding surface plate comes into contact with the valve seat, the base can be rotated, the bearing can be slid, and the vertical position and tilt of the frame can be adjusted to provide a large degree of freedom, and the range of the surface plate posture can be set. wide. For these reasons, this device facilitates the mounting / removing work and the work of adjusting the platen position, and the working time can be greatly shortened. In addition, compared to the case where the base structure is the conventional valve box flange surface fixed structure,
It can be made small and compact, and it can be fixed securely and no strength member is required. Therefore, the weight can be significantly reduced and workability can be improved. By adopting a configuration in which the frame of the sliding device is tubular and the rotation of the shaft is transmitted through the frame, the device can be further downsized, and the moving parts do not appear outside. It is safe as it prevents your fingers, clothes, etc. from being caught.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment.

FIG. 2 is a left side view showing the first embodiment.

FIG. 3 is a plan view showing the first embodiment.

FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 5 is a diagram showing a frame tilt adjusting operation of the first embodiment.
It is a BB enlarged sectional view of No.

6 is an enlarged sectional view taken along line CC of FIG.

FIG. 7 is an explanatory diagram of a shaft support slide operation of the first embodiment.

FIG. 8 is an explanatory diagram of a frame vertical position adjusting operation according to the first embodiment.

FIG. 9 is a front view showing another example of the drive unit according to the first embodiment.

FIG. 10 is a side view showing another example of the drive unit according to the first embodiment.

FIG. 11 is a side view showing a second embodiment.

12 is an enlarged cross-sectional view taken along the line DD of FIG.

13 is an enlarged sectional view taken along line EE of FIG.

FIG. 14 is a cross-sectional view showing an installed state in the valve box of the first embodiment.

FIG. 15 is a cross-sectional view showing the structure of a gate valve.

[Explanation of symbols]

 1 Valve Seat Sliding Device 2 Base 3 Opening 4 Bearing Mounting Groove 5 Bearing 6 Bolt 7 Bearing Fixing Jig 8 Spacer 9 Pivot Shaft 10 Support Block 11 Tightening Bolt 12 Frame 13 Tightening Bolt Penetration Long Hole 14 Sliding Board 15 Driven sprocket 16 Chain 17 Driven sprocket 18 Motor support 19 Motor fixing screw 20 Motor 21 Crank handle 22 Frame 23 Shaft 24 Support block 25 Tightening jig 26 Set screw 27 Driven bevel gear 28 Driven bevel gear 29 Axis part 30 Air motor 31 Valve device 32 Valve box 33 Valve seat 34 Lid fitting part 35 Lid 36 Valve body 37 Valve rod

Claims (5)

[Claims] 1. An opening is provided in the center of a circular base rotatably fitted to a fitting portion for supporting a valve rod above a valve box of a sluice valve, and an elongated frame is provided in the opening. The support block is inserted, the position of the support block is adjustable in the longitudinal direction of the frame, and the shaft supporting portion for rotatably supporting the support block on the base is slidably attached to the base, and the sliding surface plate is attached to the lower end of the frame. A valve seat lapping apparatus in which a frame is provided with a drive unit for rotating a platen at an upper end of the frame, and a transmission mechanism for transmitting a driving force of the drive unit to the sliding platen is provided in the frame. 2. The valve seat slide device according to claim 1, wherein a drive source such as an air motor or an electric motor is used for the drive unit. 3. The drive unit uses a crank handle,
The valve seat sliding device according to claim 1, which is a mechanism that is manually operated. 4. The valve seat slide device according to claim 1, wherein an endless chain is used as the transmission mechanism. 5. The valve seat according to claim 1, wherein the frame is tubular, and a shaft is passed inside the frame, and the driving force from the drive unit is transmitted to the sliding surface plate by the shaft. Sliding device.