JP7004282B2 - Gate valve installation method - Google Patents

Description

The present invention relates to a sluice valve having a valve box and a valve lid and a sluice valve installation method.

Conventionally, a sluice valve capable of separating a valve box and a valve lid is known (see, for example, Patent Document 1).

The sluice valve of Patent Document 1 has a valve box (main body of the water stop portion in the document) in which a plate-shaped valve body is housed, and a valve lid having an operating shaft (main body of the operating part in the document) is detachably configured. ing. A metal fitting provided with a U-shaped notch is fixed to the outer end of the valve body, and a rectangular push plate is fixed to the tip of the operation shaft. It is used as a work sluice valve that can shut off the flow path of the fluid pipe by fastening the valve lid to the valve box with the push plate inserted in the U-shaped notch and the operation shaft connected to the valve body. ..

Jikkenhei 5-52493 Gazette

When blocking the flow path of a fluid pipe having a large diameter (for example, a pipe diameter of 1000 mm), the valve box and the valve lid become large, so that the weight of the work sluice valve becomes extremely large. Therefore, when the work sluice valve with the valve lid fixed to the valve box is installed in the fluid pipe, the heavy machine for suspending the work sluice valve becomes large and the construction cost increases. Moreover, since a large heavy machine is used, the road occupancy range becomes large, the work time is limited, and the work efficiency is lowered.

Further, in the case of a configuration in which the push plate of the operation shaft can be inserted into the U-shaped notch provided at the end of the valve body like the sluice valve of Patent Document 1, the push plate can be inserted with the large valve lid suspended. It is very difficult to align with the U-shaped notch, which reduces work efficiency.

Therefore, even when blocking the flow path of a fluid pipe having a large diameter, a sluice valve and a sluice valve installation method with high work efficiency are desired.

The characteristic configuration of the sluice valve according to the present invention is a valve box mounted on a fluid pipe, a valve lid containing a plate-shaped valve body, and a fastening mechanism for fastening the valve box and the valve lid. The valve body is integrally composed of a main body portion located inside the valve lid and a protruding portion projecting to the outside of the valve lid before the valve lid is fastened to the valve box. The point is that the protrusion is provided with a guide mechanism for guiding the insertion into the opening of the valve box.

In this configuration, the valve box and the valve lid in which the valve body is housed are separately configured and integrated by a fastening mechanism. Therefore, even if the weight of the sluice valve is large, the valve box and the valve lid can be installed separately at the construction site, so that the heavy machinery can be downsized and the construction cost can be reduced.

Further, according to this configuration, the protruding portion of the valve body housed in the valve lid is projected to the outside of the valve lid, and this protruding portion is inserted into the opening of the valve box. Since the protruding portion is a part of the valve body that blocks the flow path of the fluid pipe having a large diameter, the surface area is large and the visibility is high. As a result, even when the heavy valve lid is suspended, the protruding portion can be easily inserted into the opening of the valve box, and the work efficiency is high.

Moreover, if a guide mechanism for guiding the insertion of the protruding portion into the opening of the valve box is provided as in the present configuration, the work efficiency can be further improved. Therefore, it was possible to provide a sluice valve with high work efficiency even when blocking the flow path of a large-diameter fluid pipe.

Another characteristic configuration is that the guide mechanism has a first wheel fixed to the protrusion and a first rail fixed to the bottom of the opening of the valve box and to which the first wheel slides. It is in the point of having.

If the first wheel is provided on the protruding portion protruding to the outside of the valve lid and the first rail is provided on the bottom of the opening of the valve box as in this configuration, the first wheel is simply arranged on the first rail. The valve lid can be positioned with respect to the valve box.

Another characteristic configuration is that the guide mechanism has a push-up mechanism capable of pushing up the valve body.

Since the valve body has a certain length, the protruding portion of the valve body may hang down slightly with respect to the parallel posture of the valve box. If a push-up mechanism for pushing up the valve body is provided as in this configuration, the protruding portion can be inserted into the opening of the valve box with the axis of the valve body and the axis of the valve lid aligned. As a result, the axis of the valve box and the valve lid are aligned by simply inserting the protruding portion in the parallel posture into the opening of the valve box, so that the fastening work of both members can be facilitated.

Another characteristic configuration is that the push-up mechanism is composed of a bolt screwed into a hole formed in the bottom of the valve lid.

If the push-up mechanism is configured with bolts whose position can be adjusted according to the degree of screwing as in this configuration, the valve can be valved at the construction site even if the opening of the valve box and the protruding portion of the valve body are misaligned. It becomes possible to adjust the position of the body. As a result, it is not necessary to lift the valve lid again to adjust the position of the valve body, and the work efficiency can be improved.

Another characteristic configuration is that the second wheel is fixed to the main body portion, and the second rail on which the second wheel slides is fixed to the bottom portion of the valve lid.

If a second wheel is provided on the main body of the valve body located inside the valve lid and a second rail is provided on the bottom of the valve lid as in this configuration, after the valve lid and the valve box are fastened. , A large weight valve body can be moved smoothly.

Another characteristic configuration is that the guide mechanism is attached to a pin member fixed to the first end surface of either the valve box or the valve lid, and to the second end surface of either the valve box or the valve lid. The point is that it is formed and is composed of a recess into which the pin member can be inserted.

If the guide mechanism is composed of a pin member and a recess as in this configuration, it is only necessary to prepare the pin member and process the end faces of the valve box and the valve lid, so that the manufacturing cost can be reduced.

Another characteristic configuration is that a push bolt for separating the valve lid from the valve box is provided at the end of either the valve box or the valve lid.

If a push bolt that separates the valve lid from the valve box is provided as in this configuration, even if the valve box and the valve lid are fixed, they can be easily separated. Therefore, even when the sluice valve is removed, the valve lid and the valve box can be lifted separately, the size of the heavy machine can be reduced, and the construction cost can be reduced.

The characteristic configuration of the sluice valve installation method according to the present invention is a step of mounting a valve box on a fluid pipe and a step of moving a valve lid accommodating a plate-shaped valve body toward the opening of the valve box. And a step of fastening the valve box and the valve lid.

In this method, the valve box and the valve lid in which the valve body is housed are separately installed and both members are fastened. Therefore, even if the weight of the sluice valve is large, the valve box and the valve lid can be installed separately at the construction site, so that the heavy machinery can be downsized and the construction cost can be reduced. Moreover, if the valve lid containing the valve body is moved to the opening of the valve box and then both members are fastened, the installation of the sluice valve is completed, so that the work efficiency is high. Therefore, even when blocking the flow path of a large-diameter fluid pipe, it is possible to provide a method for installing a sluice valve with high work efficiency.

It is a side view which shows the state which attached the sluice valve to the fluid pipe. It is a side sectional view of a valve box. FIG. 2 is a view taken along the line III-III in FIG. It is a side sectional view of a valve lid. It is a VV line arrow view of FIG. It is a figure which shows the 3rd end surface of a valve lid. It is a side view of a valve body. It is a top view of a valve body. It is a figure which shows the state which a wheel got on a rail. It is a side sectional view which shows the state which the valve lid is attached to the valve box. It is a side sectional view which shows the state which a valve is closed. It is a side sectional view which shows the state which the valve lid is removed from a valve box. It is a side sectional view which shows the state which the valve box is attached to the fluid pipe. It is a side sectional view which shows the state which the valve lid is attached to the valve box. It is a side sectional view which shows the state which the drilling device is removed. It is a side sectional view which shows the state which the branch pipe joint is installed in the pipe cut part.

Hereinafter, embodiments of the sluice valve and the sluice valve installation method according to the present invention will be described with reference to the drawings. In the present embodiment, as an example of the sluice valve, a working sluice valve X mounted on the water pipe 1 will be described. However, the present invention is not limited to the following embodiments, and various modifications can be made without departing from the gist thereof.

13 to 16 show a pipe axial direction by drilling an intermediate part of a water pipe 1 (an example of a fluid pipe) buried in the ground in a state of continuous flow (a state in which the flow of water as a fluid is maintained). An example of a branch pipe joint installation method in which the branch pipe joint 57 is installed in the pipe cutting portion after being separated by is shown. The working sluice valve X (an example of the sluice valve) in the present embodiment will be described as being used in this branch pipe joint installation method.

As shown in FIG. 1, the work sluice valve X includes a valve box 2 and a valve lid 3, and the valve box 2 is attached to a water pipe 1. Specifically, the half-split lower case 10 mounted from below the water pipe 1 exposed in the excavation region K and the half-split T-shaped upper case 11 mounted from above the water pipe 1 are bolted. , A nut or the like, and the valve box 2 is connected to the branch pipe portion 11A of the upper case 11 by a bolt, a nut or the like. Further, the first flange portion 21 is formed so as to project radially outward along the circumferential direction of the end portion of the valve box 2, and the first flange portion 21 is formed so as to project radially outward along the circumferential direction of the end portion of the valve lid 3. The two flange portions 31 are fastened with a bolt 21a and a nut 31a (an example of a fastening mechanism). A nut 31a may be provided on the side of the first flange portion 21, and a bolt 21a may be provided on the side of the second flange portion 31.

As shown in FIGS. 2 to 3, the valve box 2 is composed of a rectangular housing in a plan view, and in the center of the valve box 2, the pipe cutting portion of the water pipe 1 after drilling is passed through a branch pipe portion 11A. A rectangular fluid flow hole 22 through which tap water flows is formed through in the vertical direction. Inside the valve box 2, a valve body moving space 20 in which the valve body 4 described later can move is formed, and the valve body moving space 20 communicates with the fluid flow hole portion 22. The valve body moving space 20 has an opening 23 having an end on the valve lid 3 side, a bottom wall 24a and an upper wall 24b formed around the fluid flow hole portion 22, and a side opposite to the valve lid 3. It is a region surrounded by the side wall 25 formed at the end of the.

The valve box 2 is provided with a plurality of first through holes 26a (two locations in the present embodiment) on the opening 23 side of the bottom wall 24a, and a plurality of second through holes 26a on the side wall 25 side of the bottom wall 24a. Holes 26b (two in this embodiment) are formed. The first through-hole portion 26a and the second through-hole portion 26b are composed of a boss portion in which the outer surface of the bottom wall 24a is projected downward in a cylindrical shape, and the valve body 4 is attached to the female screw of the boss portion. The male screw of the first bolt B1 to be pushed up is screwed. Further, a pair of first rails 27 along the moving direction of the valve body 4 are fixed to both sides of the fluid flow hole portion 22 on the bottom wall 24a of the valve box 2. The first rail 27 has a length from the bottom 23a of the opening 23 to the end 22a on the side wall 25 side of the fluid flow hole 22. The first rail 27 includes a base portion 27a on which the wheel 40 of the valve body 4 described later slides, and a regulation portion 27b formed so as to project upward from the side of the base portion 27a and restrict the movement of the wheel 40 to the outside. (See Fig. 9).

Further, a plurality of pin members 28 are fixed to the first end surface 21b of the first flange portion 21 corresponding to the peripheral edge portion of the opening 23 of the valve box 2. The pin member 28 has a tapered portion 28a whose diameter decreases toward the tip. Further, a plurality of push bolts B3 for separating the valve lid 3 from the valve box 2 are inserted into the first flange portion 21 at equal intervals in the circumferential direction. The push bolt B3 may be omitted.

As shown in FIGS. 4 to 5, the valve lid 3 is composed of a rectangular housing in a plan view, and the plate-shaped valve body 4 is housed in the valve body accommodating space 30. Before the valve lid 3 is fastened to the valve box 2, a part (protruding portion 41) of the valve body 4 projects outward from the opening 30a of the valve lid 3. The valve body accommodating space 30 is an area surrounded by an opening 30a, a bottom portion 30b, an upper wall 30c facing the bottom portion 30b, and a side wall 30d on the side of the base end portion 42a of the valve body 4. Further, an operation unit 32 for moving the valve body 4 forward and backward along the horizontal direction (left-right direction in FIG. 10) is fixed to the side wall 30d of the valve lid 3. The operating portion 32 rotates an operating shaft 32a on which a male screw screwed into a female screw of a separate screw piece (not shown) fixed to the base end portion 42a of the valve body 4 is formed, and the operating shaft 32a. It has an operation handle 32b.

The valve lid 3 is provided with a plurality of third through-hole portions 33 (two locations in the present embodiment) on the opening 30a side of the bottom portion 30b. The third through-hole portion 33 is composed of a boss portion in which the outer surface of the bottom portion 30b is projected downward in a cylindrical shape, and the second bolt B2 (pushing up) that pushes up the valve body 4 to the female screw of the boss portion. An example of the mechanism) The male screw is screwed. Further, a pair of second rails 34 along the moving direction of the valve body 4 are fixed to the bottom portion 30b of the valve lid 3 on the outside of the third through hole portion 33. The second rail 34 has a length from the base end portion 42a (near the side wall 30d) of the valve body 4 to the opening 30a of the valve lid 3. Similar to the first rail 27, the second rail 34 is formed so as to project upward from the side of the base 34a on which the wheel 40 of the valve body 4 slides and the side of the base 34a, and restricts the movement of the wheel 40 to the outside. It is provided with a regulation unit 34b (see FIG. 9). When the valve lid 3 is fastened to the valve box 2, the first rail 27 and the second rail 34 are connected.

Further, when the first flange portion 21 and the second flange portion 31 face each other, the second end surface 31b of the second flange portion 31 corresponding to the peripheral edge portion of the opening 30a of the valve lid 3 becomes the first end surface 21b. A plurality of recesses 35 are formed at positions corresponding to the plurality of fixed pin members 28. Further, as shown in FIG. 6, on the third end surface 31c of the second flange portion 31 opposite to the second end surface 31b, a rotation restricting portion 36 for restricting the rotation of the nut 31a composed of a hexagon nut is provided. It is formed so as to project in a posture parallel to one side of the nut 31a.

As shown in FIGS. 7 to 8, the valve body 4 is formed in a rectangular plate shape in a plan view, and is a main body located inside the valve lid 3 before the valve lid 3 is fastened to the valve box 2. The portion 42 and the protruding portion 41 projecting to the outside of the valve lid 3 are integrally configured (see FIG. 4). A rectangular seal member S that abuts on the peripheral edge of the fluid flow hole 22 of the valve box 2 described above is fixed to the upper surface of the valve body 4.

Further, a plurality of wheels 40 (four places in the present embodiment) are fixed to the bottom of the valve body 4, and these wheels 40 are arranged at positions where they are in sliding contact with the first rail 27 and the second rail 34. .. The plurality of wheels 40 are composed of a pair of first wheels 40a located on the front side in the traveling direction of the valve body 4 and a pair of second wheels 40b located on the rear side in the traveling direction of the valve body 4. That is, before the valve lid 3 is fastened to the valve box 2, the first wheel 40a is fixed to the protruding portion 41 protruding to the outside of the valve lid 3, and the second wheel 40b is inside the valve lid 3. It is fixed to the base end portion 42a of the main body portion 42 located at. These wheels 40 are rotatably configured around a shaft member 46 supported by a support member 45 fixed to the bottom of the valve body 4 (see FIG. 9).

Further, in the valve body 4, a plurality of pressed upper portions 43 (4 locations in the present embodiment) pushed up by the first bolt B1 of the valve box 2 described above are formed so as to protrude outward from the protruding portion 41 and the base end portion 42a. Has been done. The pressed upper portion 43 is connected to the vertical plate 43a fixed to the protruding portion 41 and the base end portion 42a, the horizontal plate 43b connected to the lower end of the vertical plate 43a, and the outer surfaces of the vertical plate 43a and the horizontal plate 43b. The reinforcing plate 43c is integrally formed.

As shown in FIG. 10, at the construction site, the valve lid 3 in which the valve body 4 is housed is assembled to the valve box 2 mounted on the water pipe 1. Therefore, even if the weight of the entire work sluice valve X is large, the valve box 2 and the valve body 4 can be suspended separately by a heavy machine, so that the heavy machine can be miniaturized and the construction cost can be reduced. can. At this time, the protruding portion 41 of the valve body 4 protruding to the outside of the valve lid 3 is inserted into the opening 23 of the valve box 2. Since the protruding portion 41 is a part of the valve body 4, the surface area is large and the visibility is high. As a result, even when the heavy valve lid 3 is suspended by a heavy machine, the protruding portion 41 can be easily inserted into the opening 23 of the valve box 2.

Further, in the present embodiment, the first wheel 40a provided in the protruding portion 41 and the first rail 27 provided in the opening 23 of the valve box 2 are inserted into the opening 23 of the valve box 2 of the protruding portion 41. It constitutes a guide mechanism to guide. That is, when the protruding portion 41 is inserted into the opening 23 of the valve box 2, the valve lid 3 can be positioned with respect to the valve box 2 simply by arranging the first wheel 40a on the first rail 27. ..

As described above, since the protruding portion 41 of the valve body 4 is projected to the outside of the valve lid 3, the valve body 4 may slightly hang downward with respect to the posture of the valve box 2. Therefore, in the present embodiment, a guide mechanism (a guide mechanism) for guiding the insertion of the protrusion 41 into the opening 23 of the valve box 2 by the second bolt B2 that abuts on the bottom surface of the valve body 4 and can push up the valve body 4. It constitutes a push-up mechanism). That is, by pushing up the valve body 4 with the second bolt B2, the protrusion 41 is inserted into the opening 23 of the valve box 2 in a state where the axis of the valve body 4 and the axis of the valve lid 3 are aligned with each other. Therefore, the shaft core of the valve lid 3 and the shaft core of the valve box 2 coincide with each other. As a result, the work of fastening the bolt 21a and the nut 31a of the valve box 2 and the valve lid 3 is facilitated. Moreover, since the second bolt B2 can be easily operated at the construction site, even if it is difficult to insert the protruding portion 41 of the valve body 4 into the opening 23 of the valve box 2, the position of the valve body 4 is adjusted and the valve is valved. The valve lid 3 can be securely attached to the box 2.

Further, as shown in FIG. 6, the third end surface 31c of the second flange portion 31 of the valve lid 3 is provided with a rotation regulating portion 36 that regulates the rotation of the nut 31a composed of the hexagon nut. The valve box 2 and the valve lid 3 can be fastened only by rotating the bolt 21a. Therefore, it is not necessary to screw the bolt 21a while pressing the nut 31a with a tool, and the fastening work can be performed quickly and smoothly.

Further, as shown in FIG. 10, the pin member 28 fixed to the first end surface 21b of the valve box 2 and the recess 35 formed in the second end surface 31b of the valve lid 3 form the valve box 2 of the protruding portion 41. It constitutes a guide mechanism for guiding the insertion into the opening 23. That is, if the pin member 28 is fitted into the recess 35, the protruding portion 41 can be inserted into the opening 23 of the valve box 2 in a state where the shaft core of the valve body 4 and the shaft core of the valve lid 3 are aligned with each other. .. Further, since the tapered portion 28a is provided at the tip of the pin member 28, it can be easily inserted into the recess 35. A recess 35 may be provided in the first end surface 21b of the valve box 2 and the pin member 28 may be fixed to the second end surface 31b of the valve lid 3.

FIG. 11 shows a state in which the valve body 4 is closed. The valve body 4 is moved by the pushing operation by the operation unit 32 until the pressed upper portion 43 of the valve body 4 is close to the side wall 25 of the valve box 2. Next, the first bolt B1 is rotated to bring the first bolt B1 into contact with the pressed upper portion 43, and the valve body 4 is pushed up. As a result, the seal member S fixed to the upper surface of the valve body 4 abuts on the peripheral edge of the fluid flow hole portion 22 of the valve box 2 and is compressed, preventing tap water from flowing out to the downstream side of the valve body 4. Will be done.

When the first flange portion 21 and the second flange portion 31 are sealed with a sealing member (not shown), when the valve lid 3 is removed from the valve box 2 after the valve body 4 is opened, the first flange portion 21 and the second flange portion 31 are sealed. The one flange portion 21 and the second flange portion 31 may be fixed by the sealing member. Therefore, as shown in FIG. 12, in the present embodiment, the push bolt B3 inserted in the first flange portion 21 is rotated to come into contact with the second flange portion 31, and the valve lid 3 is separated from the valve box 2. It is supposed to be. As a result, even the valve lid 3 having a large weight can be easily removed.

Subsequently, with reference to FIGS. 13 to 16, a branch pipe joint installation method including a sluice valve installation method according to the present embodiment will be described. The sluice valve installation method includes the following steps (5) to (8), and the branch pipe joint installation method includes the following steps (1) to (13).

(1) As shown in FIG. 13, the area around the cut area of the water pipe 1 is excavated, the lower part of the excavation area K is solidified with the base concrete 51, and the water pipe 1 on the side of the cut area is concrete for fixing the pipe. Fix at 52.
(2) The two-divided joint ring 53 is attached to a predetermined position of the water pipe 1 between the cutting area of the water pipe 1 and the concrete 52 for fixing the pipe (two places on the side of the cutting area in this embodiment). ..
(3) A cutting machine 54 is attached to the water pipe 1 between the pair of joint wheels 53.

(4) The lower case 10 and the upper case 11 are attached to the water pipe 1 in a sealed state so as to cover the joint ring 53 and the cutting machine 54, and H steel or the like is supported between the base concrete 51 and the lower case 10. The member 55 is attached to receive the load of the lower case 10 and the upper case 11.
(5) The valve box 2 is attached to the branch pipe portion 11A of the upper case 11 with bolts, nuts, or the like. As a result, the valve box 2 is attached to the water pipe 1.
(6) As shown in FIG. 14, the valve lid 3 accommodating the valve body 4 is suspended from the opening 23 of the valve box 2 by a crane or the like with the protruding portion 41 protruding outward. Move towards. At this time, the valve body is pushed up by the second bolt B2 so that the axis of the valve body 4 and the axis of the valve lid 3 are aligned with each other.

(7) The protrusion 41 is inserted into the opening 23 of the valve box 2 (see FIG. 10). At this time, the first wheel 40a fixed to the protruding portion 41 is arranged on the first rail 27 of the valve box 2, and the pin member 28 fixed to the first end surface 21b of the valve box 2 is placed on the valve lid 3. It is inserted into the recess 35 formed in the two end surface 31b. As a result, the shaft core of the valve box 2 and the shaft core of the valve lid 3 coincide with each other.
(8) The first flange portion 21 of the valve box 2 and the second flange portion 31 of the valve lid 3 are fastened with a bolt 21a and a nut 31a (see FIG. 1). This completes the installation of the work sluice valve X.

(9) As shown in FIG. 15, the upper housing 56 is connected to the work sluice valve X in a sealed state, the electrically operated rod 6 is connected to the cutting machine 54, and the cutting machine 54 is driven to drive the water pipe 1. Disconnect.
(10) The cutting machine 54 and the section are integrally lifted into the upper housing 56, and the valve body 4 is closed. At this time, the valve body 4 is pushed up by the first bolt B1 to compress the seal member S fixed to the upper surface of the valve body 4 to prevent the outflow of tap water to the downstream side (see FIG. 11).
(11) The lid portion 56a of the upper housing 56 is removed, and the cutting machine 54 and the section are removed from the electrically operated rod 6.

(12) As shown in FIG. 16, a branch pipe joint 57 is attached to the electrically operated rod 6, the valve body 4 is opened, and the branch pipe joint 57 is attached to the pipe cutting portion. At this time, the joint ring 53 is temporarily joined to the branch pipe joint 57 and the water pipe 1 by a push rod 58 provided in the upper case 11.
(13) The upper housing 56, the work sluice valve X, the upper case 11, and the lower case 10 are removed, the joint ring 53 and the branch pipe joint 57 are fastened, and the branch pipe joint 57 is installed in the water pipe 1. When removing the work sluice valve X, as shown in FIG. 12, the push bolt B3 inserted in the first flange portion 21 is rotated to bring it into contact with the second flange portion 31, and the valve lid 3 is placed in the valve box. Separate from 2. Then, the valve lid 3 and the valve box 2 are separately lifted and removed by a crane or the like. Since the branch pipe joint 57 has the same configuration as the branch pipe joint described in Japanese Patent Application Laid-Open No. 2005-9184, detailed description thereof will be omitted.

[Other embodiments]
1. 1. The work sluice valve X of the above-described embodiment has been described as a sluice valve used in the branch pipe joint installation method, but is not particularly limited as long as it is a sluice valve used in a method in which it is necessary to shut off the flow path. For example, the work sluice valve X may be used in a repair valve installation method in which a repair valve is installed in the water pipe 1 or a fluid control valve installation method in which a fluid control valve is connected to the water pipe 1.

2. 2. In the above-described embodiment, as a guide mechanism for guiding the insertion of the protruding portion 41 of the valve body 4 into the opening 23 of the valve box 2, (a) the opening of the first wheel 40a and the valve box 2 provided in the protruding portion 41. The first rail 27 provided in the portion 23, (b) the second bolt B2 capable of pushing up the valve body 4 in contact with the bottom surface of the valve body 4, and (c) fixed to the first end surface 21b of the valve box 2. It was composed of three types of mechanisms: a pin member 28 and a recess 35 formed in the second end surface 31b of the valve lid 3. It may be configured by any one of these guide mechanisms, or may be configured by any two of them.

3. 3. At the work site, the valve lid 3 in which the protruding portion 41 of the valve body 4 is housed is moved toward the opening 23 of the valve box 2 mounted on the water pipe 1, and then the valve box 2 and the valve box 2 are moved. It may be fastened to the valve lid 3.

4. The first rail 27 and the second rail 34 are not particularly limited as long as they have a structure in which the wheels 40 of the valve body 4 can slide. For example, the regulation portions 27b and 34b of FIG. 9 may be provided on both sides of the base portions 27a and 34a.

5. The first bolt B1 and the second bolt B2 that push up the valve body 4 are not limited to bolts, and may be any structure that can push up the valve body 4, for example, formed by a wedge member. good.

6. The water supply work using the work sluice valve X in the above-described embodiment is merely an example, and can be used for various works that require blocking the flow path of liquid or gas.

INDUSTRIAL APPLICABILITY The present invention can be used as a method for installing a work sluice valve or a work sluice valve that shuts off a flow path.

1 Water pipe (fluid pipe)
2 Valve box 3 Operculum 4 Valve body 21a Bolt (fastening mechanism)
21b First end surface 23 Opening 27 First rail (guide mechanism)
28 Pin member 31a Nut (fastening mechanism)
31b Second end surface 33 Third through hole (hole)
34 Second rail 35 Recess 40a First wheel (guide mechanism)
40b Second wheel 41 Protruding part 42 Main body part B2 Second bolt (pushing mechanism, guide mechanism)
B3 Push bolt X Work sluice valve (sluice valve)

Claims (3)

A foundation installation process in which the lower part of the excavation area formed by excavating the periphery of the fluid pipe is solidified with base concrete,
A case mounting process in which a case is mounted so as to surround the fluid pipe located above the base concrete in a sealed state, and a support member for receiving the load of the case is mounted between the case and the base concrete. ,
The valve box mounting process for mounting the valve box on the case and
The valve lid accommodating the plate-shaped valve body is suspended by a crane, and the valve lid is oriented toward the opening of the valve box so that the axis of the valve lid and the axis of the valve box coincide with each other. The valve lid moving process to move horizontally and
A gate valve installation method comprising a fastening step of fastening the valve box and the valve lid. In the valve lid moving step, a pin member fixed to the first end surface of either the valve box or the valve lid is formed in a recess formed in the second end surface of either the valve box or the valve lid. The sluice valve installation method according to claim 1, wherein the sluice valve is inserted into the shaft to match the shaft core of the valve lid with the shaft core of the valve box. The claim that in the valve lid moving step, the valve body is pushed up by a bolt screwed into a hole formed in the bottom of the valve lid to match the axis of the valve body with the axis of the valve box. The sluice valve installation method according to 1 or 2.

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