JP2001220731A - Device for opening and closing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the position of a valve element by moving an operating rod vertically, and open and close the valve element with a slight operating force by ensuring positioning of the valve element. SOLUTION: When a vertical groove 73 in a vertical movement guiding cylinder 65 is in engagement with the projection 75 of a receiving cylinder portion 64, the operating rod 62 and the vertical movement guiding cylinder 65 are integrated together by engagement of an external thread portion 66 with an internal thread portion 67 and can move vertically. Under these conditions, rotation of the operating rod 62 in a tightening or loosening direction causes the projection 75 provided on the inner surface of the receiving cylinder portion 62 to move to a horizontal groove 74 to integrate the vertical movement guiding cylinder 65 with the receiving cylinder portion 64. Then the operating rod 62 rises and falls and the valve element 61 can be operated for opening and closing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve opening / closing device for a valve used for drainage of a culvert in a paddy field or an underground irrigation facility, for example.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a conventional underdrainage drain valve 1 used for drainage of underdrain in a paddy field, for example. In the figure, 2 is a paddy field, 3 is a ridge, 4 is a drainage channel, 5
Reference numeral denotes a culvert water absorption pipe buried in the ground below the paddy field 2, and reference numeral 6 denotes a drainage pipe leading from the water absorption pipe 5 to the drainage channel 4. The culvert drain valve 1 has a joint pipe 7 to which the drain pipe 6 is connected to both ends, and a rising pipe 8 rises from an intermediate portion of the joint pipe 7. This standing pipe 8
It is exposed on the ridge 3 on the ground. A valve body 9 for opening and closing a water channel formed therein is provided in the joint pipe 7 so as to be able to move up and down, and an operating rod 11 rising from the valve body 9.
Protrudes up through the inside of the standing pipe 8. Also, a cap 12 is provided at the upper end of the standing pipe 8 exposed to the ground.
Are fitted and attached to the outer peripheral side of the standing pipe 8. At the center of the cap 12, there is formed a receiving cylinder 13 through which the operating rod 11 penetrates, and a fixing ring 14 is screwed to the receiving cylinder 13. Further, an operation handle 15 is fixed to an upper end portion of the operation rod 11 protruding upward from the cap 12.

[0003] In order to manage wet and dry fields, the valve body 9 is opened and closed by moving the operation handle 15 up and down on the ground. With the culvert drain valve 1 open, the paddy field 2
The underground water below is absorbed into the water absorption pipe 5, and is drained to the drainage channel 4 through the drainage pipe 6 and the joint pipe 7, whereby a dry rice field is achieved. On the other hand, in a state where the underdrain drain valve 1 is closed, the drainage from the water suction pipe 5 is shut off, so that the groundwater stops under the paddy 2 and the wetland is formed.

In such a valve opening / closing device in which the operation handle 15 is simply moved up and down to open and close the valve body 9, the valve body 9 cannot be pressed against the drainage pipe 6 strongly, and the drainage pipe 6 can be securely connected. It is difficult to close the valve, and when the valve 9 is closed,
There is a possibility that water will leak from the gap between the drain pipe 6 and the water. For this reason, in order to surely stop the water by the valve body 9, for example, if the operation handle 15 is screwed to the cap 12 and the valve body 9 is tightened by rotation of the operation handle 15, the water stoppage is ensured. However, the operation handle 15 is screwed into the valve body 9 by rotating the operation handle 15.
In the structure for opening and closing the valve, the operation handle 15 is rotated from the fully open state to the closing of the valve body 9, so that it takes a troublesome time to open and close the valve body 9 and there is a problem that the operability is poor.

An object of the present invention is to solve such a problem and to provide a valve opening / closing device which can perform opening / closing operations easily and quickly and can surely stop water by a valve body. And

[0006]

According to a first aspect of the present invention, there is provided a valve opening / closing apparatus for a valve, comprising: a joint pipe; a valve body provided in the joint pipe; and an operating rod rising from the valve body. An operating handle provided at an upper end portion of the operating rod, a standing pipe provided upright from the joint pipe to cover the operating rod, and an opening through which the operating rod is inserted. A partition plate attached to the upper opening, a receiving cylinder formed at the periphery of the opening, and an elevating guide pipe slidably provided inside the receiving cylinder; Lifting and lowering guide means for screwing the rod and rotating the operating rod to open and close the valve body, and guides the raising and lowering guide tube to the sliding surface between the lifting and lowering guide tube and the receiving cylinder so as to be able to move up and down freely. Rotation restricting means for restricting rotation of the lifting guide tube in conjunction with the rotation of the operating rod. It is.

As described above, since the operation handle is screwed to the elevating guide tube and the elevating guide tube is vertically movably guided by the receiving tube portion, the valve for draining the culvert in the fully opened state is closed, or When the closed drainage valve in the closed state is fully opened, the elevating guide means guides the elevating guide tube and the operating rod to the receiving cylinder so as to be able to move up and down. Thus, the valve for draining the culvert can be opened and closed simply by moving the operating rod up and down. In addition, when the valve for draining the culvert is securely closed, when the operating rod is rotated in the tightening direction, the rotation of the elevating guide tube is restricted by the rotation restricting means, and the elevating guide tube and the receiving cylinder part are integrated. . For this reason, by rotating the operating rod screwed to the elevating guide pipe, the operating rod is lowered, and the valve body comes into close contact with the joint pipe, so that the valve body can be reliably closed. On the other hand, when the valve for drainage of the culvert is opened, by rotating the operating rod in the direction of loosening, after the rotation restricting means is released, the operating rod is further rotated in the direction of loosening, and the rotation restricting means rotates the lifting guide cylinder. Regulates
In this state, by further turning the operating rod, the operating rod screwed to the elevating guide pipe is raised, and the valve body is separated from the joint pipe. Thereafter, the operation rod is rotated in the opposite direction, that is, in the tightening direction, and the rotation of the rotation restricting means is released again. As a result, the operating rod and the elevating guide cylinder are ascended again, and the culvert drain valve is opened. Then, after raising the operating rod to an arbitrary height, by rotating the operating rod in a loosening direction, rotation of the elevating guide cylinder is restricted by the rotation restricting means, and the operating rod is raised by rotating the operating rod. It is possible to adjust the culvert drain valve. That is, in a valve for drainage of a culvert, when the valve is closed for a long time, the valve body comes into close contact with the inner surface of the joint pipe, and it is difficult to easily pull up the operating rod. Therefore, when opening the culvert drain valve, first, the operating rod is screwed to the elevating guide pipe, the operating rod is raised by the action of the screw, and then the screwing of the elevating guide pipe and the operating rod is released. Then, the operating rod and the elevating guide cylinder are raised integrally. This ensures that the valve body is separated from the inner surface of the joint pipe and the valve can be easily opened with a small force. Then, when the underdrain drain valve is opened, the underground water under the paddy field is absorbed into the underdrain suction pipe, drained through the joint pipe, and a dry field is achieved. On the other hand, when the underdrain drain valve is closed, drainage from the underdrain suction pipe is shut off, so that groundwater stops below the paddy field and wetlands are formed.

According to a second aspect of the present invention, there is provided a valve opening / closing device for a valve, wherein the lifting / lowering guide means projects from the lifting / lowering guide tube or the receiving cylinder, and engages with the projection to form the lifting / lowering guide tube or the receiving tube. The rotation control means is configured by a vertical groove provided along the axial direction of the cylindrical portion, and the rotation restricting means communicates with the protrusion in a horizontal direction from both sides of the vertical groove and engages with the protrusion. And a groove.

[0009] With this arrangement, it is possible to easily and quickly open and close the culvert drain valve by raising and lowering the operating rod when the vertical groove and the projection are engaged. By rotating the operating rod in the tightening direction or in the loosening direction, the protrusion moves into the horizontal groove communicating with the vertical groove, and finally locks at the end of the horizontal groove. As a result, the receiving cylinder portion and the elevating guide cylinder are integrated, and the rotation of the elevating guide cylinder is regulated, so that the culvert drain valve can be arbitrarily adjusted by rotating the operating rod.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the valve opening / closing device according to the present invention will be described below with reference to FIGS. In this embodiment, an example in which the present invention is applied to an underdrain drain valve used for underdrainage in a paddy field or an underground irrigation facility will be described. In FIG. 7, 21 is a paddy field, 22 is a ridge, 23 is a ridge or a shoulder of an agricultural road, 24 is underground below the paddy field, 25
Is drainage flume. A culvert water absorption pipe 26 is buried under the paddy field 21 at a depth of about 1 m underground 24. The water absorption pipe 26 is formed by joining a plurality of pipes. One end of the water absorption pipe 26 is enlarged in diameter to form a receiving port 27, and the other end of the adjacent water absorbing pipe 26 is inserted into the receiving port 27. Has a gap for water flow. At the same time,
A plurality of water passage holes 28 are also formed in the peripheral wall portion. Reference numeral 29 denotes a riser tube bent at 90 °.
One end is connected to the receiving port 27 of the water absorption pipe 26, and the other end is exposed to the levee or the ground of the farm road shoulder 23. The opening at the other end of this riser pipe 29 is a screw cap
It is closed openably by 30. In addition, the starting pipe
The upper part of 29 is connected to a pipeline 31 buried in a ridge or a farm road shoulder 23. This pipeline 31
It is used for guiding water from irrigation ditches. Furthermore, drain pipe 32,
33 is buried underground 24 between the suction pipe 26 and the drainage flume 25.

An underdrain drain valve (water lock) 41 is buried in the underground 24 in the drain pipes 32 and 33. Next, the configuration of the culvert drain valve 41 will be described in detail. 42 is a joint pipe made of synthetic resin such as hard vinyl chloride, and this joint pipe 42 is almost T-shaped,
A drain pipe connection portion 43 is provided on both sides, and a cylindrical standing pipe connection portion 44 is provided above the intermediate portion thereof. Drain pipes 32 and 33 are fitted and connected to the two drain pipe connection portions 43, respectively, thereby forming a water passage communicating from the water suction pipe 26 to the drain flume 25. In the present embodiment, the drain pipes 32 and 33 are connected to the inside of the drain pipe connection part 43. However, the drain pipe may be connected to the outside of the drain pipe connection part. Further, the lower end of the standpipe 45 is fitted into the standpipe connection portion 44 and fixed by an adhesive. This standing pipe 45
It is made of synthetic resin such as hard vinyl chloride which is relatively easy to cut, and has a vertical cylindrical shape.

Reference numeral 46 denotes a connecting pipe made of a synthetic resin such as hard vinyl chloride.
A vertical cylindrical protection pipe connecting part 47 is connected to the lower part of the tapered part 46A, and a vertical cylindrical protection box having a diameter larger than that of the standing pipe connecting part 47 at the upper part. The connecting portion 48 is provided continuously. The upper end of the rising pipe 45 is fitted into the rising pipe connecting portion 47 and fixed by an adhesive. 51 is a protective box made of synthetic resin such as hard polyethylene, and this protective box 51 is
It has a vertical cylindrical shape, and its lower end is fitted to the outside of the protection box connection part 48 of the connection pipe 46. Reference numeral 52 denotes a disk-shaped partition plate made of a synthetic resin such as hard vinyl chloride.The partition plate 52 closes an upper opening of the connection pipe 46, and a vertical cylindrical portion 52b is provided on the lower surface side of the flat plate portion 52a. This cylindrical portion 52b is fitted to the inner peripheral surface of the connection pipe 46 and fixed by an adhesive. Numeral 54 is a lid made of concrete. This lid 54 has a substantially disk shape and closes the upper opening of the protection box 51.
On the lower surface of the lid 54, a fitting portion 55 that fits into the upper end portion inside the protection box 51 is formed so as to protrude, and a step 56 that is placed on the upper end surface of the protection box 51 has a fitting portion 55. Is formed around. Also, a concave portion 57 is provided on the upper surface of the lid 54.
Is formed, and a lid handle 58 is provided at the center of the concave portion 57.

Reference numeral 61 denotes a round valve body which is a water stop portion for opening and closing a water passage in the joint pipe 42. The valve body 61 is moved up and down to a position between the two drain pipe connection sections 43 in the joint pipe 42. It is provided freely. Further, a lower end portion of the operating rod 62 located in the rising pipe 45 is fixed to the valve body 61. This operating rod 62
Is made of a synthetic resin such as hard vinyl chloride which is relatively easy to cut, and has a vertical cylindrical shape. This operating rod
62 penetrates an opening 63 formed at the center of the partition plate 52, and its upper end is located in the protection box 51. A receiving cylinder portion 64 for guiding the operating rod 62 is formed integrally with the periphery of the opening 63, and an elevating guide cylinder 65 is provided inside the receiving cylinder portion 64 so as to be able to move up and down. On the inner peripheral surface of the elevating / lowering guide cylinder 65, there is formed a female screw part 67 screwed to a male screw part 66 formed near the upper end of the operating rod 62.
A substantially T-shaped operation handle 70 is fixed to the upper end of the operation rod 62. The operating handle 70 has a hole-shaped operating rod connecting portion 71 at a lower portion, and the operating rod 62 is fitted to the operating rod connecting portion 71 and fixed by an adhesive. By rotating the operating rod 62 with the operating rod 62, the operating rod 62 screwed to the elevating and lowering guide cylinder 65 is raised and lowered to open and close the valve body 61. In addition, a vertical groove 73 and a large number of horizontal grooves 74 that are continuously provided from both sides of the vertical groove 73 so as to be parallel to each other are formed on the outer peripheral surface of the vertical guide cylinder 65. A pair of left and right protrusions 75 is provided on the inner peripheral surface of the receiving cylinder portion 64 for guiding the air. The projection 75 and the vertical groove 73 form an elevating guide means 80 (shown in FIG. 4), and the projection 75 and the horizontal groove 74 form a rotation regulating means 81 (shown in FIG. 4). As shown in FIG. 1 and the like, the vertical groove 73 is formed along the axial direction of the elevating guide cylinder 65 with its lower end opened, while each horizontal groove 74 communicates with the vertical groove 73. The central portion is connected to the vertical groove 73. That is, the vertical groove 73 is formed so as to extend between the horizontal grooves 74 so as to penetrate the center of each horizontal groove 74. The vertical groove 73 is formed to be slightly wider than the diameter of the protrusion 75, but each horizontal groove 74 has substantially the same groove width as the protrusion 75.

Reference numeral 85 denotes a rotating portion provided at an intermediate portion of the operation tube 62 so as not to transmit the rotation of the operation handle 70 to the valve body 61. As shown in FIG. 6, the rotating portion 85 is interposed between the vertically divided operation tubes 62, and the upper operation tube 62
A inner rod 86 fitted into the lower end opening of A, and a lower operation pipe
The inner rod 86 is fitted to the peripheral edge of the upper opening of 62B and the outer rod 87 is rotatably fitted to the inner rod 86. The inner rod 86 is a cylindrical part 86
A, and a flange portion 86B protruding from the lower peripheral edge of the cylindrical portion 86A, while the outer rod 87 is connected to the flange portion 86B.
And a through hole 90 of the cylindrical portion 86A formed on the upper surface of the cylindrical portion 87. Then, the inner rod 86 is inserted from below the outer rod 87, and the cylindrical portion of the inner rod 86 is inserted.
86A is inserted into the through hole 90 of the outer rod 87. After this, the cylindrical part 86
A is adhesively fixed to the upper operation tube 62A, and
The lower operation tube 62B is inserted into the inner peripheral surface of 87, and the outer rod 87 and the operation tube 62B are bonded and fixed. As a result, the inner rod 86 is
The upper and lower operation pipes 62A and 62B are rotatably connected by fitting the inner rod 86 to the outer rod 87.

Next, the operation of the above configuration will be described. When constructing the culvert drain valve 41, the upper end of the protection box 51 is fitted to the ground 22a of the ridge 22.
The height of the underdrain drain valve 41 is adjusted. For this purpose, after laying the joint pipe 42 together with the water absorption pipe 26 and the drain pipes 32 and 33 in the ground, measure the height from the drain pipe connection part 43 of the water absorption pipe 26 and the joint pipe 42 to the ground 22a of the ridge 22. Then, as shown by a chain line in FIG. 4B, the standing tube 45 is cut off to an appropriate length. Then, after the rising pipe connecting portion 47 of the connecting pipe 46 is bonded and fixed to the rising pipe 45, the partition plate 52 is put on the protection box connecting portion 48 of the connecting pipe 46, and the operating rod 62 projects from the cylindrical portion 53 of the partition plate 52. While connecting, the cylindrical portion 52b vertically hanging on the back side of the partition plate 52 is connected to the connecting pipe.
Fit inside 46 and glue. Thereafter, the height of the operating rod 62 projecting from the partition plate 52 with the valve body 61 closed is 5 cm.
The operation rod 62 is cut so that the operation rod 62 is at a proper degree, and the operation rod connection part 71 of the operation handle 70 is fitted to and adhered to the distal end thereof. And
The protection box 51 is fitted into the outer peripheral surface of the protection box connection portion 48 of the connection pipe 46. In this case, the protection box connection portion 48 and the protection box 51 are fitted together with the dimensional accuracy of the protection box connection portion 48 and the protection box 51 increased so that the outer peripheral surface of the protection box connection portion 48 is in close contact with the inner surface of the protection box 51. Combine. As a result, the protection box 51 is slid up and down along the connecting pipe 46 so that the protection box 5 is aligned with the ground 22a of the ridge 22.
Adjust the height of 1. 5A shows a case where the overall height of the underdrain drain valve 41 is increased, and FIG. 5B shows a case where the overall height of the underdrain drain valve 41 is reduced.

The lid 54 is normally closed. However, in order to open and close the culvert drain valve 41 for managing wet and dry fields, the lid 54 is opened and the operation handle 70 is rotated. The valve body 61 is opened and closed. Here, the male screw portion 66 of the operating rod 62 is screwed to a female screw portion 67 formed on the inner peripheral surface of the lifting guide tube 65, but the lifting guide tube 65 is mounted inside the receiving tube portion 64, The vertical guide cylinder 65 has a vertical groove formed on its outer peripheral surface.
Either 73 or the horizontal groove 74 is engaged with a projection 75 formed on the inner surface of the receiving cylinder portion 64. That is, as shown in FIG. 4A, when the vertical groove 73 of the elevating guide cylinder 65 and the projection 75 of the receiving cylinder portion 64 are engaged, the male screw portion 66 and the female screw portion 67 are screwed together. Thus, the integrated operation rod 62 and the elevating guide cylinder 65 can move up and down along the protrusion 75. Thereby, when the underdrain drain valve 41 in the fully opened state is closed, or when the underdrain drain valve 41 in the closed state is fully opened, the operating rod 62 is simply moved up and down to open and close the underdrain valve 41. You. However, in the state where the projection 75 is engaged with the vertical groove 73, the receiving cylinder portion 64
The operating lever 62 easily moves up and down, and the position is not determined. Therefore, in order to securely close the culvert drain valve 41, the operating rod 62 is pushed downward while the projection 75 is engaged with the vertical groove 73, and the valve body 61 is pressed against the joint pipe 42. FIG.
As shown in (b), by rotating the operation handle 70 in the tightening direction (arrow R), the lifting guide cylinder 65 screwed to the operating rod 62 is rotated in unison, and the rotation of the lifting guide cylinder 65 The projection 75 projecting from the inner surface of the receiving cylinder portion 64 moves from the vertical groove 73 of the elevating guide cylinder 65 to a horizontal groove 74 connected to the vertical groove 73, and finally the end of the horizontal groove 74. Because it hits the department
The rotation of the lift guide tube 65 is restricted, and the lift guide tube 65 and the receiving tube
64 is integrated. As described above, the operating guide 62 is screwed into the elevating guide cylinder 65 so that the operating cylinder
The operating rod 62 screwed to the female screw portion 67 of the elevating guide cylinder 65 moves downward in conjunction with the rotation operation of the 62. Accordingly, the valve body 61 provided at the lower end of the operating rod 62 can be held in a state in which the valve body 61 is in close contact with the inner surface of the joint pipe 42. When the valve 41 for culvert drainage is opened, as shown in FIG.
By rotating in the direction in which 70 is loosened (arrow R1), the protrusion 75 is moved from the horizontal groove 74 through the vertical groove 73 to the opposite horizontal groove.
It moves to 74 and finally hits the end of the horizontal groove 74. Accordingly, the rotation of the lifting guide cylinder 65 is restricted, and the rotation of the operation handle 70 causes the operating rod 62 screwed to the female thread portion 67 of the lifting guide cylinder 65 in conjunction with the rotation operation of the operating rod 62 to move upward. Go to Thus, the valve body 61 fixed to the lower end of the operating rod 62 is separated from the joint pipe 42. After the valve body 61 is separated from the joint pipe 42 in this manner, the tightening direction of the operating handle 70 (arrow R)
To move the projection 75 from the horizontal groove 74 to the vertical groove 73.
By pulling up the operation handle 70 in this state, the operation rod 62 and the elevating guide cylinder 65 are raised integrally, and the culvert drain valve 41 can be opened. Thereafter, after the operation handle 70 is pulled up to an arbitrary height, the projection 75 in the vertical groove 73 moves to the horizontal groove 74 located on the opposite side by rotating the operation handle 70 in a direction to loosen further (arrow R1). Finally, the rotation of the elevating guide cylinder 65 is restricted by abutting against the end of the horizontal groove 74, and the elevating guide cylinder 65 and the receiving cylinder part 64 are integrated.
Thus, the operating rod 62 and the valve body 61 attached to the tip of the operating rod 62 are held. If the operating rod 62 is further turned from this state, the operating rod 62 is raised by screwing the male screw 66 and the female screw part 67, and the opening of the culvert drain valve 41 can be adjusted. That is, when the culvert drain valve 41 is opened, when the culvert drain valve 41 is closed for a long time with the valve 41 closed, the valve body 41 comes into close contact with the inner surface of the joint pipe 42 and the operating rod 62 is easily moved. It is difficult to raise. Therefore, when opening the culvert drain valve 41, first,
The operation rod 62 is screwed into the female screw portion 67 of the valve 65 and the operation rod 62 is raised by the action of the screw, whereby the valve element 41 is easily separated from the inner surface of the joint pipe 42. By unscrewing the operating rod 62 and the operating rod 62 and raising the operating rod 62 and the elevating guide cylinder 65 congruently, the culvert drain valve 41 can be easily opened with a small force. Then, after the operation handle 70 is pulled up to an arbitrary height, the protrusion 75 in the vertical groove 73 is moved to the horizontal groove 74 located on the opposite side by rotating the operation handle 70 again in the direction of loosening (arrow R1). Finally, the rotation of the elevating guide cylinder 65 is restricted by abutting against the end of the horizontal groove 74, and the elevating guide cylinder 65 and the receiving cylinder part 64 are integrated. Thereby, the operation rod 62 and the valve body 61 attached to the tip of the operation rod 62 are held. If the operating rod 62 is further turned from this state, the operating rod 62 is raised by screwing the male screw 66 and the female screw portion 67, and the culvert drain valve 41
Can be adjusted. When rotating the operating handle 70 to open and close the culvert drain valve 41, the operating handle 70
The upper operation pipe 62A, to which is fixed, rotates together with the operation handle 70. However, since the upper operation pipe 62A and the lower operation pipe 62B are connected via the rotating portion 85, the culvert drainage When the valve 41 is opened and closed, the lower operation tube 62B does not rotate. That is, the lower operation tube 62B is a rotating portion.
85, the valve body 61 attached to the lower end of the operation pipe 62B does not rotate following the upper operation pipe 62A because it is rotatably connected to the upper operation pipe 62A. I will not. For this reason, since the valve element 61 does not rub against the joint pipe 42 and is worn, the wear of the valve element 61 can be suppressed.

When the underdrain drain valve 41 is opened, the underground water under the paddy field 21 that has been absorbed into the intake pipe 26 is drained by the drain pipes 32 and 33 and the underdrain drain as shown by an arrow a in FIG. The water is drained to the drain flume 25 through the joint pipe 42 of the valve 41. As a result, the paddy field 21 is converted into a dry field. on the other hand,
In the state where the underdrain drain valve 41 is closed as shown in the figure, the drainage from the water suction pipe 26 is blocked by the valve body 61 at the joint pipe 42, so that the underground water stops under the paddy 21 and the wetland is formed. . Further, by supplying water from the irrigation channel via the pipeline 31 and the rising pipe 29, it is also possible to positively perform soil irrigation from the water suction pipe 26 as shown by an arrow b in FIG.

As described above, in the culvert drain valve 41, the vertical groove 73 is formed on the outer surface of the elevating guide cylinder 65, and the projection 75 that engages with the vertical groove 73 projects on the inner surface of the receiving cylinder portion 64. And by providing a large number of parallel horizontal grooves 74 communicating with the vertical grooves 73, the operating handle 70 is moved up and down when the vertical grooves 73 and the projections 75 are engaged, so that simple and quick operation is possible. The operation of opening and closing the culvert drain valve 41 can be performed. Further, by rotating the operating rod 62 in the tightening direction or the loosening direction, the projection 75 moves into the horizontal groove 74 communicating with the vertical groove 73, and is finally locked at the end of the horizontal groove 74.
Thereby, the receiving cylinder portion 64 and the elevating guide cylinder 65 are integrated, and the rotation of the elevating guide cylinder 65 is regulated. Therefore, the rotation of the operating rod 62 can adjust the culvert drain valve 41 arbitrarily.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example,
In the embodiment, the vertical groove 73 and the horizontal groove 74 are formed on the outer peripheral surface of the elevating guide cylinder 65, and the example in which the protrusion 75 is formed on the inner surface side of the cylindrical receiving portion 64 is shown. Forming a groove 73 and a horizontal groove 74,
A projection 75 may be formed on the elevating guide cylinder 65.

In the above embodiment, the material of the lid 54 is made of concrete. However, the material of the lid may be a metal such as iron or stainless steel. Any material may be used as long as it has a certain strength and is hardly deteriorated by ultraviolet rays or the like. Further, the material, shape and detailed structure of each part are not limited to those of the above-described embodiment. For example, standing rod, operating rod, protection box,
The standpipe connection part and the protection box connection part of the connection pipe, and the operation rod connection part of the operation handle are not limited to the cylindrical shape as in the above-described embodiment, and may be formed in a rectangular tube shape. It is sufficient that the fitting portion has a columnar shape.

[0021]

According to the first aspect of the present invention, a valve opening / closing device for a valve includes a joint pipe, a valve body provided in the joint pipe, an operating rod rising from the valve body, and an upper end of the operating rod. An operating handle, an upright pipe standing upright from the joint pipe to cover the operating rod, a partition plate having an opening through which the operating rod is inserted, and mounted to an upper opening of the upright pipe, and the opening A receiving tube portion formed on the periphery of the portion, and an elevating guide tube slidably provided inside the receiving tube portion. The operation rod is screwed onto the guide tube, and the operation rod is rotated. The opening / closing operation of the valve body, the lifting / lowering guide means for guiding the lifting / lowering guide tube to the sliding surface between the lifting / lowering guide tube and the receiving cylinder portion, and the lifting / lowering guide in conjunction with the rotation operation of the operating rod. A rotation restricting means for restricting the rotation of the pipe is provided, so that the lifting guide pipe can be moved up and down When the culvert drainage valve in the fully opened state is closed by guiding to the place, or when the closed culvert drainage valve is fully opened, the operating rod can be simply moved up and down to open and close the culvert drainage valve. After the position of the valve body is determined to some extent in this manner, the rotation regulating means positions the elevating guide tube in the receiving cylinder portion, and the operation of rotating the operating rod reliably opens and adjusts the culvert drain valve. It can be performed.

According to a second aspect of the present invention, there is provided the valve opening / closing device for a valve, wherein the lifting / lowering guide means projects from the lifting / lowering guide tube or the receiving cylinder, and engages with the projection to form the lifting / lowering guide tube or the receiving tube. The rotation control means is configured by a vertical groove provided along the axial direction of the cylindrical portion, and the rotation restricting means communicates with the protrusion in a horizontal direction from both sides of the vertical groove and engages with the protrusion. Since it is composed of the groove, it is possible to easily and quickly open and close the culvert drain valve, and by rotating the operating rod in the tightening or loosening direction, the protrusion engages with the end of the horizontal groove. When stopped, the receiving cylinder part and the elevating guide cylinder are integrated, and the culvert drain valve can be arbitrarily adjusted by rotating the operating rod.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an underdrain drain valve according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the ascending and descending guide rod portion.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

4 (a) and 4 (b) show an engagement state between an engaging portion and an engagement receiving portion of the culvert drain valve, and FIG. 4 (a) shows an engagement state between a vertical groove and a projection, and FIG. FIG. 4C shows a state in which the valve is loosened.

5 (a) is an overall sectional view of the underdrain drain valve, and FIG. 5 (b) is a sectional view of the underdrain drain valve in a state where the overall height is lower.

FIG. 6 is an enlarged cross-sectional view showing the vicinity of the turning part.

FIG. 7 is a sectional view of the entire culvert drainage facility.

FIG. 8 is a sectional view showing an example of a conventional underdrain drain valve.

[Explanation of symbols]

 26 Culvert drainage pipe 41 Culvert drainage valve 42 Fitting pipe 45 Standing pipe 46 Connecting pipe 51 Protection box 52 Partition plate 54 Lid 61 Valve body 62 Operating rod 64 Receiving cylinder part 65 Elevating guide cylinder 66 Male screw part 67 Female screw part 70 Operating handle 73 Vertical groove 74 Horizontal groove 75 Projection 80 Elevating guide means 81 Rotation regulating means

Claims (2)

[Claims] 1. A joint pipe, a valve body provided in the joint pipe, an operation rod rising from the valve body, an operation handle provided at an upper end of the operation rod, and an upright standing from the joint pipe. A standing pipe for externally covering the operating rod, a partition plate having an opening through which the operating rod is inserted and attached to an upper opening of the standing pipe, and a receiving cylinder formed at a peripheral edge of the opening; An elevating guide tube slidably provided inside the receiving cylinder portion, wherein the operating rod is screwed into the guide tube, and the valve body is opened / closed by rotating the operating rod, and On the sliding surface between the guide tube and the receiving cylinder portion, there are lift guide means for guiding the lift guide tube up and down freely and rotation regulating means for regulating the rotation of the lift guide tube in conjunction with the rotation operation of the operating rod. A valve opening / closing device for a valve, wherein the valve opening / closing device is provided. 2. A projection projecting from the elevation guide tube or the receiving cylinder portion, wherein the elevation guide means is engaged with the projection and provided along the axial direction of the elevation guide tube or the reception cylinder portion. And the rotation restricting means comprises the protrusion, and a horizontal groove which communicates in a horizontal direction from both sides of the vertical groove and engages with the protrusion. The valve opening / closing device for a valve according to claim 1.