JPH07260010A - Extensible and contractible apparatus of rotary valve - Google Patents

Abstract

PURPOSE:To facilitate changing of the driving part installing direction after a rotary valve is attached to a piping by slidably fitting an outside extensible and contractible stem to be attached to a casing of a driving part into an outside stem to be attached to a valve main body in the axial direction, and bolting them in the suitable operating position. CONSTITUTION:The lower end of an extensible and contractible apparatus 12 is slidably fitted to the outside of an inside valve rod 17 connected to a valve rod 14 through a set key 20 and a continuous key groove 21, and the upper end is similarly fitted to an inner cylindrical extensible and contractible valve rod 19 connected to a shaft 18 of a driving part 13. Moreover, an extensible and contractible stem 27 for supporting both valve rods 17, 19 to a valve main boy 11b, and wherein the lower end is attached to the outside of an outside stem 24 attached to a valve main body 11b, and the upper end is attached to the casing 13a of the driving part 13 through a connecting bolt 25 is slidably fitted. A plurality of longitudinal bolt holes 28, 28 to be matched to each other are formed on the outer peripheral side surfaces of both stems 24, 27, and a fixing bolt 30 is screwed into both bolt holes in the suitable operating position, so as to fix both stems 24, 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic device which can easily change the installation direction of a drive unit such as the drive unit height and the direction of an operating handle after a rotary valve is attached to a pipe.

[0002]

2. Description of the Related Art Conventionally, with respect to a rotary valve installed on the ground or in a buried pipe, the height of a drive unit and the direction of an operating handle are determined by a pipe design drawing in advance. However, such a rotary valve on the ground or in the buried pipe is likely to cause some error (height difference) depending on the site where the pipe is installed, and the optimum height of the drive unit and operation handle Otherwise, safe and comfortable operation could not be performed. Therefore, after the pipes have been installed, additional work such as cutting or extending the stanchions and valve stems is necessary depending on the situation at the site (referred to as unusable work), and as a result, time, labor, cost, etc. are required.

In order to avoid the above-mentioned inconvenience, the underground buried valve can be opened and closed by opening and closing the underground buried valve having different depths at the site simply by preparing one kind of operation handle. The controls have already been devised. (Actual fairness 4-
This is shown in FIGS. 7 (a) and 7 (b).
As shown in FIG. 2, a valve rod (rotating shaft for opening and closing the valve body) 2 of an underground valve (which belongs to a sluice valve in which the valve body moves up and down) 2 and an operation handle 3 that can be carried around are installed. The extension operating shaft 4 is supported by the valve box (valve body) 6 of the underground buried valve 1 by the cylindrical mounting member 5. The extension operating shaft 4 is connected to the valve rod 2 at the lower end. The prismatic shaft 4 is slidably fitted between the fitting first connecting portion 7 and the upper end operation handle 3 and fitting second connecting portion 8 while restricting relative rotation.
a and a square tubular shaft 4b, and the mounting member 5 has a first cylindrical portion 5a having a fixing portion 9 fixed to the valve box 6 at the lower end and an upper end at the upper end. A support portion 10 that holds the rectangular tubular shaft 4b rotatably around its axis.
It has an expansion and contraction fixing part B which is screwed together with the second cylindrical part 5b having. In use, as shown in FIG. 2B, the second cylindrical portion 5b is appropriately rotated with respect to the first cylindrical portion 5a by a hand or the like to expand and contract the mounting member 5, and the prismatic shape is automatically changed. The rectangular tubular shaft 4b slides in the longitudinal direction with respect to the shaft 4a, and the extension operation shaft 4 expands and contracts, whereby the position of the second connecting portion 8 is vertically displaced, and the underground buried valve 1
Each of the second connecting portions 8 can be positioned at a constant height H from the ground GL.

[0004]

SUMMARY OF THE INVENTION In the above devised device, the mounting member 5 for expanding and contracting the extended operation shaft 4 interposed between the valve rod 2 of the underground valve 1 and the operation handle 3 is provided. Since the expansion and contraction fixing portion B is composed of the first cylindrical portion 5a and the second cylindrical portion 5b which are screwed to each other and expand and contract, the expansion and contraction fixing portion B is formed on one outer surface or inner surface of both the expandable and contractible cylindrical portions.
A screw with a length corresponding to the vertical displacement adjustment length must be formed, so not only is it troublesome to process the screw, but during long-term use, the screw part sticks due to rusting of the screw part. However, there is a problem in that there is a risk that it may interfere with the vertical displacement movement work.

On the other hand, in this one, the upper and lower opening / closing operations of the internal sluice valve body are fitted and connected to the second connecting portion 8 at the upper end of the extension operating shaft 4, and the lower end portion of the portable manual operating handle 3 is fitted, The operation handle 3 is rotated in a horizontal plane, and no consideration has been given to the change of the rotation operation position of the manual operation handle or the direction of the handle.

Further, the extension operation shaft 4 (4
a, 4b) prismatic shafts and prismatic shafts are less marketable,
There is no economic effect. Also, there is no valve opening / closing instruction scale near the operation handle, and the opening / closing of the sluice valve element is operated by the operator's intuition or experience, so reliable sealing is lacking, and excessive tightening due to excessive operating torque causes Twist of the square tube,
Bending is possible.

The present invention solves the above-mentioned problems of the prior art. For a rotary valve whose pipe mounting position may fluctuate, a high level technique is not required at the mounting site after pipe mounting. It is an object of the present invention to provide a retractable instrument for a rotary valve, which can easily change the height, direction, etc. of the drive unit for multiple purposes.

[0008]

In order to achieve the above-mentioned object, the present invention provides an internal cylindrical shape having one end connected to the outside of an internal valve stem connected to the valve stem and one end connected to the shaft of the drive unit. An expandable instrument for a rotary valve, in which an expandable valve rod is slidably fitted, and both of these fitted valve rods are supported by a valve body via an extendable support column, wherein The inner cylindrical telescopic valve rod is formed into a circular cross section, and is fitted slidably in the axial direction through a rotation preventing member that fits with the key groove. The external support columns to be mounted are configured by externally extending and retracting columns, one end of which is attached to the casing of the drive unit, slidably fitted in the axial direction, and the outer peripheral side faces of these fitted columns are aligned with each other in the vertical direction. A plurality of holes for connecting bolts are provided at the predetermined positions of
It is characterized in that both of these columns are fixed at the optimum operation position by inserting fixing bolts into the aligned bolt coupling holes.

The internal valve rod and the internal tubular telescopic valve rod are provided with an implant key fixed to the internal valve rod and a continuous key groove having both ends provided on the internal tubular telescopic valve rod. Through,
It is characterized by being fitted so as to be slidable in the axial direction.

Further, the invention is characterized in that a guide member for guiding the peripheral surface of the inner cylindrical telescopic valve rod is attached to the inside of the outer column constituting the telescopic column.

[0011] Further, the end portion of the external telescopic column constituting the telescopic column is connected to the casing of the drive unit, the shaft of the drive unit coupled to the internal tubular telescopic valve rod, and the valve rod shaft hole of the drive unit. It is characterized in that the coupling portions with and are configured such that the installation directions of the driving portions are variable.

Furthermore, an O-ring is mounted on the fitting surface between the external support column and the external telescopic support column, and the mounting surface between the end of the external external support column and the valve body and the end of the external telescopic support column and the drive unit. It is characterized in that it has a waterproof and drip-proof structure by interposing a seal member on each mounting surface with the casing.

[0013]

Since the present invention is constructed as described above, when changing the height of the drive part of the rotary valve after the pipe is attached, the fixing bolts inserted through the bolt connecting holes are attached to the external support columns. After removing the fixing bolts, the external expansion support column fixed in place is moved in the vertical direction with the drive unit attached, so that the internal cylindrical expansion valve rod is also integrated, Move in the vertical direction while sliding, and screw the fixing bolt (fixed point bolt) of the above-mentioned external expansion support to the bolt connection hole at the optimum position of the external support again at a location where the operator has optimum operability. And fix it.

When the direction (direction) of the operating handle of the drive unit is changed due to the surrounding devices, the casing of the drive unit attached to one end (upper end) of the external expansion support column is moved from the one end. After detaching and pulling out from the valve rod extension, the drive unit is rotated to an angle position where optimum operation is possible to change the direction, and then the drive unit is attached to the external telescopic column again in the reverse order. At this time, the valve stem shaft hole of the drive unit and the valve stem extension shaft are coupled through the key and the key groove, and the casing of the drive unit and the external telescopic support are arranged so that the bolt holes for connection are displaced. It is designed to be combined. That is, the number of bolt holes is four or a multiple thereof (8, 12 ...) And can be changed by 90 degrees.

[0015]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 (a) is an assembled front view of a butterfly valve, which is one of rotary valves in which the telescopic device according to the present invention is attached to the middle portion and the drive portion is attached to the top portion.

In the figure, a butterfly valve 11 is a valve body 1.
1A shows a fully closed state in which 1a is closed, a telescopic device 12 according to the present invention is attached to a flange 11c of a valve body 11b of the butterfly valve 11, and the top and bottom ends of the telescopic device 12 are attached. Drive unit 1 via flange 26
3 is attached. FIG. 2B shows the drive unit 13 described above.
The main part inside is shown.

FIG. 2 is a longitudinal sectional view showing the internal structure of FIG. In the figure, the retractable device 12 has a lower end on the outside of an internal valve rod 17 connected to a valve rod 14 by an implantation key 15 and a bolt 16, and an upper end on a shaft 18 of a drive unit 13 corresponding to a valve rod extension. An internal cylindrical telescopic valve rod 19 connected by welding, an implant key 20 fixed to the internal valve rod 17 with a flat screw or the like, and a height adjustment range provided on the internal tubular telescopic valve rod 19. Through a continuous key groove 21 having a length corresponding to the (moving range) and whose upper and lower ends are closed, it is slidably fitted in the axial (valve shaft) direction, and these are fitted together. A lower end flange 23 whose lower end is connected to a flange 11c of the valve body 11b by a connecting bolt 22 in order to support both valve rods 17 and 19 on the valve body 11b.
On the outside of the outer support column 24 fixed by welding or the like,
An external expansion support 27 fixed by welding or the like is fitted to an upper end flange 26 whose upper end is connected to the casing 13a of the drive unit 13 by four connecting bolts 25 so as to be slidable in the axial direction. And these two columns 24 and 2
7, bolt holes 28 are formed on the outer support columns 24 and bolt holes 29 are formed on the outer support columns 27 at regular intervals in the vertical direction on the outer peripheral side surface and at symmetrical positions in the circumferential direction. A plurality of holes (eight in the figure) are drilled at matching positions, and hexagonal bolts 30 corresponding to fixing bolts are provided in the bolt holes 29 and the bolt screw holes 28 aligned with each other when adjusting the height. Two screws are screwed into symmetrical positions and fixed to each other. As a result, the internal valve rod 17 and the internal tubular valve rod 19 described above are fixedly supported by the valve body 11b.

On the other hand, the drive unit 13 rotates the operation handle 31 to pass through the worm shaft 32 and then the worm 33.
And the worm gear 34 mesh with each other to rotate, and four key grooves 35 formed at a central shaft hole 34a of the worm gear 34 at 90 ° intervals and a shaft corresponding to a valve rod extension portion. An implanting key 36 fixed to 18 by a flat screw or the like is fitted to each other so that an external force (torque) applied to the operation handle 31 is transmitted to the shaft 18.

Further, inside the upper end of the outer support column 24,
A guide member 37 for smoothly sliding and guiding the circumferential surface of the inner tubular expansion / contraction valve rod 19 concentrically is attached, and as a waterproof and drip-proof measure for the inside, the outside of the tip of the outer support column 24 is installed. Further, an O-ring 38 is attached as a sealing material, and commercially available plugs made of polyethylene are inserted into the bolt holes 29 of the external expansion support column 27 and the bolt screw holes 28 of the external support column 24 after the height adjustment. , A lower end flange 23 fixed to the lower end of the outer column 24 and an upper flange 11c of the valve body 11b.
Between the upper end flange 26 fixed to the upper end of the external expansion support 27 by welding or the like and the lower surface of the casing 13a of the drive unit 13, and gaskets 39 and 40, respectively.
Is intervening. In the figure, 41 is a hexagon bolt for fixing the drive unit 13 to the valve stem extension 18. In addition, the valve stem extension 18, the internal valve stem 17, and the valve stem 1 described above.
Each of the implantation keys 36, 20 and 15 of 4 are oriented in the same direction.

Next, the operation will be described. Now, after attaching the rotary valve to the pipe on site, assuming the case where the height of the drive unit 13 and the direction of the operation handle 31 are not preferable due to the relationship of surrounding devices, the procedure for improvement will be described below.

First, the height of the drive unit 13 is adjusted by removing the two hexagon bolts 30 screwed into the outer support column 24 at symmetrical positions, and setting the external telescopic support column 27 including the drive unit 13 to a predetermined height. When distracted (extended and contracted), the internal tubular expansion / contraction valve rod 19 is integrally synchronized with the shaft 18 of the drive unit 13, and
Extend while sliding on the outer peripheral surface of 7. At this time, in the inner valve rod 17, the implanting key 20 has the uppermost end 21a and the lowermost end 21b of the long groove 21 continuous in the axial direction of the inner tubular telescopic valve rod 19.
It does not move and does not move only by sliding between.

Then, at the optimum operation position of the worker, the bolt holes 29 and the bolt screw holes 28 aligned with each other are provided with the two holes.
A hexagon bolt 30 is screwed in to fix both columns 24 and 27, and the work is completed. In addition, when the external expansion support 27 is extended, the vertical bolt holes 2 of the external expansion support 27 are extended.
Even when the key groove 21 is extended to the lowermost end position, the lowermost end 21b of the key groove 21 comes into contact with the implanting key 20 and serves as an internal stopper, so that there is no risk of withdrawal and dropout.

Next, when the direction (direction) of the operation handle 31 of the drive unit 13 is changed according to the relationship with surrounding devices,
4 of connecting bolt 25 between drive unit 13 and telescopic device 12
By removing the book and the hexagon bolt 41 at the top, the drive unit 13 is detached upward. Then, the operation handle 31 of the drive unit 13 can be changed by 90 ° in any direction,
Insert the implantation key 36 of the shaft 18 of the drive unit 13 into the valve stem shaft hole 34
The work is completed by fitting one of the four key grooves 35 of a and assembling in the reverse order of the above.

FIG. 4 is a sectional view of an essential part showing another embodiment of the present invention. In the figure, the same reference numerals as those shown in FIG. 3 (a) indicate the same or similar parts. I shall.
In this embodiment, two implantation keys 20A are fixed at symmetrical positions at the tip of the internal valve rod 17, and the internal tubular telescopic valve rod 1 is provided.
It is fitted in nine consecutive keyways 21. According to this embodiment, it is effective when it is used when a large transmission torque is transmitted to both valve rods 17 and 19 and the rotary valve has a large bore diameter or a large rotational torque.

Further, in place of the implantation keys 20 and 20A at the tip of the internal valve rod 17 described above, as shown in FIG. 5, one pin, a bolt or the like anti-rotation member 20B is fixed to the internal valve rod 17. Then, the continuous keyway 21 of the inner tubular telescopic valve rod 19
6, or as shown in FIG. 6, the inner valve rod 17 is penetrated so that both ends thereof protrude, and a rotation preventing member 20C such as a pin or a bolt is fixed to the inner tubular telescopic valve rod. You may make it fit in 19 continuous keyways 21. According to these embodiments, as compared with the embodiment shown in FIG. 3, the work of fixing the implantation key 20 to the internal valve rod 17 with screws or the like becomes simpler. In addition, it acts as a shear pin (shear pin) at the time of excessive turning torque.

In the embodiment shown in FIGS. 1 and 2, the structure in which the worm gear mechanism is used for the drive unit 13 has been described, but other drive units such as a lever type, a T-type handle type, and a cylinder type. A driving type or the like may be used. Also,
The rotary valve 11 is not limited to the butterfly valve, but may be similarly applied to a ball valve, a cock, or the like.

Further, in the above-mentioned embodiment (FIGS. 1 and 2), the structure in which eight bolt holes 29 for the hexagonal bolts 30 for fixing the external support column 24 and the external expansion support column 27 are provided in the vertical direction has been described. It goes without saying that the number of the bolt holes 29 is increased or decreased depending on the height adjustment range.

[0028]

As described above, according to the present invention,
An inner valve rod whose one end is connected to the valve rod and an internal tubular telescopic valve rod whose one end is connected to the shaft of the drive unit are formed in a circular cross section, and through a detent member that fits into the key groove. An extendable and retractable strut that is slidably fitted in the axial direction and that supports both valve rods on the valve body is attached to an outer strut that has one end attached to the valve body and one end that is attached to the casing of the drive unit. Is slidably fitted in the axial direction, and a plurality of bolt connecting holes are provided at predetermined longitudinal positions on the outer peripheral side surfaces of the fitted struts which are aligned with each other.
By fixing both of these columns at the optimum operating position by inserting the fixing bolts into the bolt connecting holes that align the fixing bolts, the height of the drive unit can be easily changed after the rotary valve is attached to the pipe. At this time, the internal telescopic valve rod also moves in synchronization with the movement of the external telescopic column, and the stopper mechanism by the key groove of the internal tubular telescopic valve rod at the shortest and longest ends prevents the valve from coming out. Moreover, since it is fixed by bolts at a fixed point, a strong and flexible effect can be achieved.

Further, an implantation key having the internal valve rod and the internal tubular expansion / contraction valve rod fixed to the internal valve rod, and a continuous key groove having both ends provided in the internal tubular expansion / contraction valve rod. Since the valve is slidably fitted in the axial direction via the valve, the valve performance of the rotary valve whose opening / closing angle is normally 90 °, that is, the rotational error of the opening / closing angle of the rotary valve that causes leakage (circumferential direction Play, regardless of whether the internal tubular expansion valve rod is expanded or contracted.
The number can be reduced by the above-mentioned sliding key and key groove.

Further, a guide member for guiding the peripheral surface of the internal tubular expansion valve rod is attached to the inside of the external column constituting the telescopic column, so that the internal tubular expansion valve rod is concentric within the external column. It is possible to make it expand and contract smoothly by arranging it in a shape.

Further, a connecting portion between the end portion of the external telescopic supporting column which constitutes the telescopic supporting column and the casing of the driving unit, a shaft of the driving unit which is connected to the internal tubular telescopic valve rod, and a valve rod shaft hole of the driving unit. By configuring the connecting parts of the drive parts so that the installation direction of each drive part can be changed, after the rotary valve is attached to the pipe, the handle direction of the drive part can be freely changed to four directions depending on the surrounding equipment. Not only is it possible to attach the rotary valve to the pipe, but it is also possible to attach the rotary valve in all directions (upright, inverted, overturned, inclined, etc.) with respect to the pipe due to the surrounding equipment.

Furthermore, an O-ring is attached to the fitting surface between the external support column and the external expansion support column, and the mounting surface between the end of the external support column and the valve body and the end of the external expansion support column and the casing of the drive unit. By interposing a seal member on each of the mounting surfaces of and, it is possible to provide a waterproof and drip-proof structure, which prevents rusting of the inner and outer surfaces of the retractable device and withstands long-term use. .

[Brief description of drawings]

FIG. 1A is an assembled front view of a rotary valve to which an expandable device and a drive unit according to the present invention are attached, and FIG. 1B is an internal configuration diagram of the drive unit.

FIG. 2 is a longitudinal sectional view of a main part of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cross-sectional view of essential parts showing another embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts showing another embodiment of the present invention.

FIG. 6 is a cross-sectional view of essential parts showing another embodiment of the present invention.

FIG. 7 shows a conventional example, (a) is a longitudinal sectional view of a main part, (b)
FIG. 4 is an explanatory diagram showing a usage state.

[Explanation of symbols]

 11 Butterfly Valve (Rotary Valve) 11b Valve Main Body 12 Telescopic Instrument 13 Drive Unit 13a Drive Unit Casing 14 Valve Bar 15 Implant Key 17 Internal Valve Bar 18 Valve Bar Extension (Drive Unit Shaft) 19 Internal Cylindrical Telescopic Valve Rod 20, 20A Implant key 20B, 20C Non-rotating member 21 Key groove 22, 25 Connection bolt 23, 26 Flange 24 External support 27 External expansion support 28 Bolt screw hole 29 Bolt hole 30 Hexagon bolt (fixing bolt) 31 Operation handle 33 Worm 34 Worm Gear 34a Valve Bar Shaft Hole 35 Key Groove 36 Implant Key 37 Guide Member 38 O-ring 39, 40 Gasket 41 Hexagon Bolt

Claims (5)

[Claims] 1. An internal cylindrical telescopic valve rod whose one end is connected to a shaft of a drive unit is slidably fitted to the outside of an internal valve rod whose one end is connected to the valve rod, and these are fitted together. In a telescopic valve retractable device in which both valve rods are supported on the valve body via the telescopic support, the internal valve rod and the internal tubular telescopic valve rod are formed in a circular cross section, and the key is Externally expandable and contractible, which is slidably fitted in the axial direction through a detent member that fits in the groove, and which has the above-mentioned expandable and retractable support, one end of which is attached to the outer support and the other end of which is attached to the casing of the drive unit. Struts are slidably fitted in the axial direction, and a plurality of bolt coupling holes are provided at predetermined longitudinally aligned positions on the outer peripheral side surfaces of the fitted strut, respectively. At the optimum operating position, both columns of the A retractable device for a rotary valve, which is characterized in that it is inserted and fixed. 2. An internal valve rod and an internal tubular telescopic valve rod, an implant key fixed to the internal valve rod, and a continuous keyway having both ends provided on the internal tubular telescopic valve rod. The expandable and retractable instrument for a rotary valve according to claim 1, wherein the retractable instrument is fitted so as to be slidable in the axial direction. 3. The expansion / contraction of a rotary valve according to claim 1, wherein a guide member for guiding the peripheral surface of the internal cylindrical expansion valve rod is attached to the inside of the external support column constituting the expandable support column. Universal instrument. 4. A shaft of a drive unit and a valve rod shaft hole of the drive unit, which are connected to an end of an external telescopic column that constitutes the telescopic column and a casing of the drive unit, and a shaft of the drive unit which is coupled to an internal tubular telescopic valve rod. The expandable and retractable instrument for a rotary valve according to claim 1, 2 or 3, wherein each of the coupling parts is configured so that the installation direction of the drive part is variable. 5. An O is provided on a mating surface between the external support column and the external telescopic support column.
A ring is attached, and a seal member is interposed between the end surface of the outer column and the valve body and the mounting surface between the end of the external telescopic support column and the casing of the drive section to create a waterproof and drip-proof structure. The expandable and retractable instrument for a rotary valve according to claim 1, 2, 3, or 4.