JPH07301360A - Openinf/closing device for rotary valve - Google Patents

Abstract

PURPOSE:To provide changeability in all directions relating to piping with no technique of high degree required by determining an optimum position and dimension in a jobsite. CONSTITUTION:A rotary valve part C is connected to an operating end part A through a telescopic shaft part B, and a valve opening indicating pointer 18, vertically moved along a guide window 11b in response to turning a handle shaft 13, is provided in an operating end part main unit 11. Simultaneously with connecting a lower end part of the handle shaft 13 to an upper end of a telescopic shaft 22 of the telescopic shaft part B by a shaft joint 24, a universal connection pin 23 mounted on the telescopic shaft 22 is slidably fitted to a long and narrow guide groove 21a of a telescopic pipe body 21, to connect a lower end of the telescopic pipe body 21 to an input shart (worm shaft) 33 of a reduction gear 32 of a rotary valve 31, so as to perform assembly. Accordingly, positions of the valve part C and operating end part A can be mounted in all directions, and since a valve opening can be confirmed even in the operating end, excessive overclosing is prevented, to facilitate setting an intermediate opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device in which a rotary valve is attached to a pipe, a degree of freedom is provided at an operation handle position, and a valve opening instruction can be confirmed at an operation end.

[0002]

2. Description of the Related Art Conventionally, for rotary valves installed on the ground or in buried pipes, the mounting positions, directions, dimensions, etc. of the valve portion, the operating end portion, and the worm shaft portion are determined by the piping design drawings in advance. However, in such a ground or buried pipe, some errors in the vertical and horizontal directions are likely to occur depending on the site where the pipe is installed, and due to the relationship with the equipment to be installed in the surroundings, the operability and work will be light unless the operation end is optimal. Could not ensure the safety of the person. Therefore, after installing the pipes, additional work such as cutting or extending the extended worm shaft etc. is required depending on the situation at the site (referred to as "useless work"). As a result, not only is it unfavorable in appearance, but also the date, labor, cost, etc. Was needed.

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-
As shown in FIGS. 7 (a) and 7 (b), this is a valve rod (rotating shaft for opening / closing the valve body) of an underground valve (belonging to a sluice valve in which the valve body moves up and down) 1. ) 2 and a portable operation handle 3
The extension operation shaft 4 interposed between the extension operation shaft 4 and the valve body (valve body) 6 of the underground buried valve 1 is supported by the cylindrical mounting member 5. A prismatic shape that is slidably fitted between the first connecting portion 7 that fits the valve rod 2 at the lower end and the second connecting portion 8 that fits the operation handle 3 at the upper end while restricting relative rotation. An expansion and contraction adjusting portion A including a shaft 4a and a rectangular tubular shaft 4b is provided, and the mounting member 5 is also provided.
Is a second cylindrical portion 5a having a fixed portion 9 fixed to the valve box 6 at the lower end and a support portion 10 at the upper end for holding the rectangular tubular shaft 4b rotatably around its axis. 5b
It has an expansion and contraction fixing part B in which and are screwed together. Then, when in use, as shown in FIG.
On the other hand, as the second cylindrical portion 5b is appropriately rotated by hand or the like to expand and contract the mounting member 5, the rectangular cylindrical shaft 4b automatically slides in the longitudinal direction with respect to the prismatic shaft 4a. As the extension operation shaft 4 expands and contracts, the position of the second connecting portion 8 is vertically displaced, and each second connecting portion 8 of the underground buried valve 1 can be positioned at a constant height H from the ground GL. It is like this.

[0004]

In the above-mentioned invention already devised, the valve is limited to the underground valve, and the prismatic columns fitted between the valve rod 2 and the operating handle 3 are fitted to each other. And the expansion and contraction fixing portion B of the mounting member 5 for expanding and contracting the extension operation shaft 4 having a rectangular tube shape are composed of the first cylindrical portion 5a and the second cylindrical portion 5b which are screwed into each other and expand and contract. Since there is no valve opening / closing instruction scale in the vicinity and the opening / closing work of the sluice valve element is left to the operator's intuition or experience, a serious accident or trouble will occur due to the inability to reliably close or open the valve. There were things. Also, closing these valves,
There is a problem that the weakest part may be damaged or damaged as a result of opening and closing with excessive torque by a wheelie (auxiliary lever) in order to ensure valve opening.

The present invention solves the above-mentioned problems of the prior art, and requires an advanced technique to determine the optimum position and size in the field for a rotary valve whose pipe mounting position and size may vary. It is an object of the present invention to provide a rotary valve opening / closing device including a valve portion, an operating end portion, and a telescopic shaft portion that can be changed in all directions with respect to piping.

[0006]

In order to achieve the above object, the invention of claim 1 is a rotary valve opening / closing device in which a rotary valve portion and an operating end portion are connected via a telescopic shaft portion. In the operation end body, a valve opening indicator that operates in response to rotation of the shaft is provided, and the drive shaft end protruding from the operation end body and the rotary valve speed reducer are input. The input shaft end portion is connected via an expansion / contraction shaft portion, and the expansion / contraction shaft portion is
An expansion tube having an elongated guide groove having both ends, and a connecting pin inserted into the expansion tube and slidably fitted in the guide groove, are attached to the expansion tube via a set bolt. Of the rotary valve reducer, which comprises a fixed expansion shaft and one end of the expansion shaft and the end of the expansion tube opposite to the one end, the drive shaft end protruding from the operation end body. It is characterized in that it is connected to each end of the input shaft.

According to the second aspect of the present invention, one end of the expansion shaft and the end of the expansion tube opposite to the one end are projected from the operation end body through a universal joint, respectively. It is characterized in that it is connected to the drive shaft end and the input shaft end of the rotary valve reducer.

Further, the invention according to claim 3 is characterized in that the connecting pin which is attached to the expanding shaft and slidably fitted in the guide groove of the expanding tube is constituted by a universal connecting pin which also functions as a shear pin. I am trying.

[0009]

Since the present invention is constructed as described above,
According to the invention of claim 1, the following action occurs. That is, since the valve mounting center line C ₁ -C _{1 of the} rotary valve portion and the field mounting surface A ₁ -A ₁ of the operating end portion are both predetermined, they are mounted at their respective positions.

Next, the expansion and contraction shaft portion, which is an intermediate portion between the two, is connected in a direction and a size determined from the environment surrounding it, that is, the relationship with other peripheral devices. The general piping installation procedure at this time is as follows. (I) When the valve portion and the operating end portion are fully closed, (ii) the valve portion is fixed to the pipe, (iii) the operating end portion is temporarily fixed, and (iv) the telescopic shaft portion is vertical or horizontal, Since it suffices to consider only the distance between the valve portion and the operating end portion, the shaft center is taken out by a weight or a level meter, and while expanding and contracting the telescopic shaft portion, (v) the operation end portion having a degree of freedom is moved and corrected. (Vi) Each joint is welded or otherwise fixed.

After the installation work is completed as described above,
The rotary valve opens and closes the valve body by rotating a handle or the like at the operating end, and the opening state of the valve body operates in response to rotation of a shaft provided at the operating end body. Displayed by the valve opening indicator.

Further, according to the invention of claim 2, in addition to the above, since a universal joint is interposed at both end connecting portions of the expansion and contraction shaft portion, when the distance between the rotary valve portion and the operating end portion is long, Or the environment surrounding the telescopic shaft, that is, the relationship with other equipment,
It is used when the shaft center is eccentric in the vertical and horizontal directions. The piping installation procedure in this case is as follows. (I) The valve part and the operation end are fully closed, (ii) the valve part is fixed to the pipe, (iii) the operation end is temporarily fixed, and (iv) the universal joint is connected to the end of the valve part. Then, (v) connect the universal joint to the operation end portion A, (vi) expand and contract the telescopic shaft portion while moving and correcting the operation end portion with a degree of freedom, and (vii) connecting each connection portion. Secure by welding or other method.

According to the third aspect of the present invention, when the valve body is opened / closed, the role of the universal connecting pin in the expansion / contraction shaft part is that excessive rotational torque is generated due to the length and inclination of the expansion / contraction shaft part. Therefore, the operator who operates the steering wheel, etc. does not understand these situations and rotates the steering wheel with an excessive force, and as a result, the function of the shear pin that prevents problems such as twisting or bending of the shaft do. Usually, this type of safety device
Although it is required that the member is easy to maintain and replace and is inexpensive, the above-mentioned universal connecting pin satisfies this condition.

[0014]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is an assembled vertical cross-sectional view of an opening / closing device with a vertical axis, showing an embodiment of the present invention attached to a butterfly valve, which is one of rotary valves, and FIG. FIG.

In the figure, the opening / closing device of the present invention is divided into three parts: an operating end portion A, a telescopic shaft portion B, and a rotary valve portion C. At the operating end portion A, the operating end portion main body 11 is installed in the field. A handle shaft 13 which is attached to the plate 12 with a hexagonal bolt 11a and which corresponds to a drive shaft passing through the operation end body 11
Are supported by the field mounting plate 12 via bearings 14a and 14b. A handle wheel 15 is fixed to an upper end of the handle shaft 13 by a hexagonal nut 16, and a screw member 17 located inside the main body 11 is provided with a set bolt 17.
It is fixed by a. Further, the valve body opening indicator needle 18 screwed to the screw member 17 has a tip end fitted into the guide window 11b of the main body 11 so as to be vertically movable, and the handle shaft 13
The valve opening is displayed by moving up and down in response to the rotation of. In the figure, 11c and 12b are bushes inserted so as to withstand outdoor specification conditions, and 12a is a hexagon bolt for fixing the field mounting plate 12.

Further, in the telescopic shaft portion B, both end portions 21
An expansion / contraction shaft 22 is inserted in an expansion / contraction tube body 21 provided with elongated guide grooves 21a having b and 21c. Both of them are free connecting pins 23 which also function as shearing pins and penetrate through the expansion / contraction shaft 22. Is inserted in the guide groove 21a so as to be slidable in the axial direction and fixed by the set bolt 25 at a desired length position. At one end (upper end in the drawing) of the expansion / contraction shaft portion B, a shaft coupling 24 for connecting to the lower end of the handle shaft 13 is fixed to the upper end of the expansion / contraction shaft 22 by welding 24a and the other end (in the drawing). The lower end) is connected to the worm shaft 33 as the input shaft of the worm gear reducer 32 of the rotary valve C by the lower end of the expansion tube 21.

Further, in the rotary valve portion C, a worm gear reducer 32 for opening and closing the valve body 31a is attached to the butterfly valve 31, and a worm shaft 33 as an input shaft of the reducer 32 is a valve rod (not shown). And a stopper mechanism 32a for fully opening and fully closing the valve body 31a.

FIG. 3 (a) shows A ₂ − of the operation end portion A of FIG.
A sectional view taken along the line A _{2 and} FIG. 2B is a side view of the operation end portion main body 11. Further, FIG. 4A shows B of the telescopic shaft portion B of FIG.
_1- B ₁ line sectional view, the same figure (b) is a side view of the extensible tube body 21.

Next, the operation will be described. The operation end portion A, the expansion / contraction shaft portion B, and the rotary valve portion C divided into three parts are assembled and installed in the field as follows.

(I) First, the rotary valve portion C has a predetermined C _1-
Piping is installed on the C ₁ axis. Normally, the valve piping and mounting work is carried out in the fully closed state. The worm gear reducer 32 of the valve portion C has a fully open and fully closed stopper mechanism 32.
By a, the valve rotates during this period to open and close. The tip of the worm shaft 33 of the worm gear reducer 32 has a telescopic shaft B.
After being inserted and connected to the lower end of the expandable and contractible tube body 21, the elastic tube body 21 is fixed by welding W ₁ or the like.

(Ii) Next, the operation end A is attached to the site mounting surface A ₁
Temporarily fixed to -A ₁ , and the opening degree indicating needle 18 is set to the fully closed state like the rotary valve section C. The tip end (lower end) of the handle shaft 13 is fixed by welding W ₂ or the like after being inserted and connected to the telescopic shaft B via the shaft joint 24. In this case, as another embodiment, as shown in FIG. 5, the shaft joint 24A may be angularly joined 13A and fixed by a set bolt 24B. By the rotation of the handle shaft 13, the opening indicating needle 18, which exists like a female screw, moves up and down along the guide window 11b via the screw member 17. The amount of the vertical movement is the worm gear reducer 32. It is determined by the number of rotations required to open and close and the screw pitch of the screw member 17. As an example, in the case of the required number of rotations: 20 rotations and the screw pitch: P ₂ (JIS B-0207 meter fine screw), the amount of vertical movement is 40 mm.

(Iii) Next, when there is no other equipment in the connecting space (intermediate part) between the operating end portion A and the rotary valve portion C, the expansion / contraction shaft portion B is placed vertically or horizontally. The shaft joint 2 is formed by extending the shaft center with a weight or a leveler and expanding and contracting the expandable shaft 22.
4 and the shaft end portion of the operation end portion A are welded as described above to W ₂
Etc., and the set bolt 25 is fixed to a desired length. Then, the operation end portion A is attached to the site mounting surface A ₁ -A ₁
Securely fix it with a hexagon bolt 12a.

(Iv) The trial operation starts when the opening indicator needle 18 of the operating end A is in the fully closed state at the lowermost position, and is completed by smooth operation without uneven rotation or creaking due to rotation of the handle wheel 15. . If the operation is not smooth, troubles such as twisting or bending of the shaft portion or the rotating portion may occur over a long period of time, causing an accident. Therefore, these are prevented in advance, and in the worst case, the universal connection pin 23 is provided as an inexpensive member at a place where maintenance and replacement are easy, and plays a role of a shear pin (shear pin).

FIG. 6 is an explanatory view showing a different embodiment of the present invention, showing the case where the telescopic shaft portion B is in the horizontal direction and the shaft center is eccentric. In this embodiment, the universal joints 41, 42 are provided at the connection ends of both ends of the expansion / contraction shaft B in the embodiment (FIG. 1).
Is provided. A rod-shaped member 21A is attached to the end portion of the expansion tube 21 on the valve portion side.
It is easy to connect with. In the figure, 43 indicates an installation floor surface. This embodiment is often used when the distance H is long or when the shaft center is vertically or horizontally decentered due to the environment surrounding the expandable shaft part B, that is, the relationship with other devices.

In the above embodiment, the butterfly valve was explained as the rotary valve portion C, but the same applies to rotary valves such as ball valves. Further, although the structure using the worm gear as the reduction gear has been described, it goes without saying that the structure is not limited to this.

[0026]

As described above, according to the present invention,
According to the first aspect of the invention, the operating end body is provided with a valve opening indicator that operates in response to the rotation of the shaft, and the drive shaft end protruding from the operating end body and the rotary valve An input shaft end that is input to the speed reducer is connected via an expansion / contraction shaft part, and the expansion / contraction shaft part is inserted into the expansion / contraction pipe body having a narrow guide groove having both ends and the expansion / contraction pipe body. A telescopic shaft having a connecting pin slidably fitted in the guide groove and fixed to the telescopic tube via a set bolt. One end of the telescopic shaft and the opposite side of the one end. By connecting the end of the expansion tube to the drive shaft end projecting from the operation end body and the input shaft end of the rotary valve reducer, the following effects are achieved.

(I) The positions of the valve portion and the operating end portion are omnidirectional with respect to the pipe (upright, inverted, overturned,
It can be mounted on a slope, etc.). (Ii) Since the open / closed state of the valve is instructed even at the operating end of the valve, the valve opening can be confirmed at the operating end, and it is easy to prevent excessive overclosing and set the intermediate opening. (iii) At both ends of the elongated guide groove provided in the expandable tube,
Since the shortest and longest ends of the telescopic shaft act as stoppers, the telescopic shaft can be prevented from slipping out. (Iv) Since the opening / closing device of the rotary valve is divided into three parts, it can be transported as a separate body, and the expansion / contraction shaft part connected to the speed reducer has already been decelerated, and the rotation torque becomes minimum. It is possible to use a commercially available steel pipe and steel bar for the elastic shaft portion.

Further, in the invention of claim 2, the one end of the telescopic shaft and the end portion of the telescopic tube body on the opposite side of the one end are protruded from the operation end body through the universal joint, respectively. By connecting to the input shaft end of the rotary valve reducer, in addition to the above, it is possible to easily connect even when the valve part and the operating end are eccentric, and a universal joint is used. By combining a telescopic shaft portion and consolidating a large number of operation ends, remote operation becomes possible, so that the safety of the operator can be ensured.

Further, in the invention of claim 3, the connecting pin which is attached to the expandable shaft and slidably fitted in the guide groove of the expandable tube is constituted by the universal connecting pin which also functions as a shear pin. After mounting the pipe, when the operation end and the valve are misaligned and the expansion shaft is overloaded and excessive torque is applied to the rotation of the valve shaft, shearing of the universal connecting pin causes excessive torque. It is possible to prevent damage to each part in advance.

[Brief description of drawings]

FIG. 1 is an assembled vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of an embodiment of the present invention divided into three parts.

3 (a) is A ₂ -A ₂ line sectional view of FIG. 2 is a fragmentary side view of (b) the operation ends.

4 (a) is a sectional view taken along line B ₁ -B ₁ of FIG. 2, and FIG. 4 (b) is a side view of a main part of a telescopic shaft portion.

FIG. 5 is a cross-sectional view of an essential part showing another embodiment of the shaft coupling part.

FIG. 6 is an explanatory diagram 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 Operation End Main Body 11b Guide Window 12 Field Mounting Plate 13 Handle Shaft (Drive Shaft) 14a, 14b Bearing Collar 15 Handle Wheel 16 Hexagon Nut 17 Screw Member 18 Opening Indicator Needle 21 Expansion Tube 21a Guide Groove 21b, 21c Guide Groove End Part 22 Expansion shaft 23 Universal connection pin 24, 24A Shaft joint 25 Set bolt 31 Rotary valve (butterfly valve) 31a Valve body 32 Worm gear reducer 33 Input shaft (worm shaft) 41, 42 Universal joint A Operating end part B Expansion shaft part C rotary valve A ₁ -A ₁ Field mounting surface C ₁ -C ₁ Valve mounting center line

Claims (3)

[Claims] 1. A rotary valve opening / closing device in which a rotary valve portion and an operating end portion are connected via a telescopic shaft portion, wherein a valve opening is provided in the operating end portion body, the valve opening being activated in response to rotation of the shaft. With a degree indicator, the drive shaft end protruding from the operation end body and the input shaft end input to the speed reducer of the rotary valve are connected via a telescopic shaft, and the telescopic shaft is connected. The expansion tube having an elongated guide groove having both ends and a connecting pin inserted into the expansion tube and slidably fitted in the guide groove through the set bolt. A telescopic shaft fixed to the body, and one end of the telescopic shaft and the end of the telescopic tube opposite to the one end, the drive shaft end protruding from the operation end body, and the rotary valve deceleration An opening / closing device for a rotary valve, characterized by being connected to each end of the input shaft of the machine. 2. An end of a telescopic shaft and an end of a telescopic tube on the side opposite to the one end projecting from a main body of an operating end through a universal joint, respectively, and an input shaft of a rotary valve reducer. The opening / closing device for a rotary valve according to claim 1, wherein the opening / closing device is connected to an end portion. 3. A flexible connecting pin that also functions as a shearing pin, wherein the connecting pin that is attached to the expanding shaft and is slidably fitted in the guide groove of the expanding tube is a free connecting pin that also functions as a shearing pin. The opening / closing device of the rotary valve according to 2.