JP2018159397A - Gate valve and gate valve installation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gate valve which achieves a high work efficiency even when a passage of a fluid pipe having a large diameter is blocked.SOLUTION: A gate valve includes: a valve box 2 attached to a fluid pipe; a valve lid 3 in which a plate-like valve body 4 is housed; and a fastening mechanism which fastens the valve box 2 to the valve lid 3. In the valve body 4, a body part 42 located within the valve lid 3 and a protruding part 41 protruding to the outside of the valve lid 3 are integrally formed before the valve lid 3 is fastened to the valve box 2. The gate valve includes guide mechanisms 40a, 27 which guide insertion of the protruding part 41 into an opening part 23 of the valve box 2.SELECTED DRAWING: Figure 14

Description

  The present invention relates to a gate valve provided with a valve box and a valve lid and a gate valve installation method.

  Conventionally, a gate valve capable of dividing a valve box and a valve lid is known (for example, refer to Patent Document 1).

  The gate valve of Patent Document 1 is configured such that a valve lid (a water stop body in the literature) in a state in which a plate-like valve body is accommodated is detachable with a valve lid (an operation body in the literature) having an operation shaft. ing. A metal fitting provided with a U-shaped notch is fixed to the outer end portion of the valve body, and a rectangular push plate is fixed to the tip of the operation shaft. In a state where a push plate is inserted into the U-shaped notch and the operating shaft is connected to the valve body, the valve lid is fastened to the valve box to be used as a work gate valve capable of blocking the flow path of the fluid pipe. .

Japanese Utility Model Publication No. 5-52493

  When the flow path of a fluid pipe having a large diameter (for example, a pipe diameter of 1000 mm) is shut off, the valve box and the valve lid are increased in size, so that the weight of the work gate valve becomes extremely large. For this reason, when the work gate valve with the valve lid fixed to the valve box is installed in the fluid pipe, a heavy machine for suspending the work gate valve becomes large, and the construction cost increases. Moreover, since a large heavy machine is used, the road occupation range becomes large, the work time is limited, and the work efficiency is lowered.

  Further, as in the gate valve of Patent Document 1, in the case where the push plate of the operation shaft can be inserted into the U-shaped notch provided at the end portion of the valve body, the push plate and the large plate are suspended. It is very difficult to align the U-shaped notch and work efficiency is reduced.

  Therefore, a gate valve and a gate valve installation method with high working efficiency are desired even when the flow path of a large-diameter fluid pipe is blocked.

  The characteristic configuration of the gate valve according to the present invention includes a valve box mounted on a fluid pipe, a valve lid in which a plate-like valve body is accommodated, and a fastening mechanism for fastening the valve box and the valve lid. The valve body is configured integrally with a main body portion located inside the valve lid and a projecting portion projecting outside the valve lid before the valve lid is fastened to the valve box. And a guide mechanism for guiding insertion of the protruding portion into the opening of the valve box.

  In this configuration, the valve box and the valve lid in which the valve body is accommodated are divided and integrated by a fastening mechanism. For this reason, even when the weight of the gate valve is large, the valve box and the valve lid can be separately installed at the construction site, so that the construction cost can be reduced by downsizing the heavy machinery.

  Moreover, according to this structure, the protrusion part of the valve body accommodated in the valve cover is made to protrude outside the valve cover, and this protrusion part is inserted into the opening part of the valve box. Since the protrusion 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 a heavy valve lid is suspended, the protruding portion can be easily inserted into the opening of the valve box, and the working 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 this configuration, the working efficiency can be further improved. Therefore, a gate valve with high working efficiency can be provided even when the flow path of the large-diameter fluid pipe is shut off.

  In another characteristic configuration, the guide mechanism includes a first wheel fixed to the protrusion, and a first rail fixed to the bottom of the opening of the valve box, on which the first wheel slides. It is in having.

  If the first wheel is provided at the protruding part that protrudes outside the valve lid and the first rail is provided at the bottom of the opening of the valve box as in this configuration, the first wheel is simply disposed on the first rail. Thus, 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 that can push up the valve body.

  Since the valve body has a certain length, the protruding portion of the valve body may hang 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 projecting portion can be inserted into the opening of the valve box with the shaft core of the valve body and the shaft core of the valve lid aligned. As a result, the shaft cores of the valve box and the valve lid coincide with each other only by inserting the projecting portion in the parallel posture into the opening of the valve box, so that the fastening operation of both members can be facilitated.

  Another characteristic configuration is that the push-up mechanism is configured by a bolt that is 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, even if there is misalignment between the opening of the valve box and the protruding part of the valve body, The body position can be adjusted. As a result, it is not necessary to lift the valve lid again to adjust the position of the valve body, and work efficiency can be improved.

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

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

  In another characteristic configuration, the guide mechanism includes a pin member fixed to a first end surface of one of the valve box and the valve lid, and a second end surface of the other one of the valve box and the valve lid. And a concave portion into which the pin member can be inserted.

  If the guide mechanism is composed of a pin member and a recess as in the present 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 one end of the valve box or the valve lid.

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

  The characteristic configuration of the gate valve installation method according to the present invention includes a step of attaching a valve box to a fluid pipe, and a step of moving a valve lid housing 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 accommodating the valve body are divided and installed, and both members are fastened. For this reason, even when the weight of the gate valve is large, the valve box and the valve lid can be separately installed at the construction site, so that the construction cost can be reduced by downsizing the heavy machinery. In addition, since the installation of the gate valve is completed if both members are fastened after the valve lid in which the valve body is accommodated is moved to the opening of the valve box, the working efficiency is high. Therefore, even when the flow path of the large-diameter fluid pipe is shut off, a gate valve installation method with high work efficiency can be provided.

It is a side view which shows the state which attached the gate valve to the fluid pipe | tube. It is a sectional side view of a valve box. It is the III-III arrow directional view of FIG. It is a sectional side view of a valve lid. FIG. 5 is a view taken along line VV in FIG. 4. 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 in which the wheel got on the rail. It is a sectional side view which shows the state which mounted | wore the valve box with the valve lid. It is a sectional side view which shows the state closed. It is a sectional side view which shows the state which removes a valve lid from a valve box. It is a sectional side view which shows the state which mounted | wore the fluid pipe with the valve box. It is a sectional side view showing the state where a valve lid is attached to a valve box. It is a sectional side view which shows the state which removes a punching apparatus. It is a sectional side view which shows the state which installed the branch pipe coupling in the pipe cutting part.

  Hereinafter, embodiments of a gate valve and a gate valve installation method according to the present invention will be described based on the drawings. In the present embodiment, as an example of the gate valve, a work gate valve X attached to 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 scope of the invention.

  In FIGS. 13 to 16, in the continuous flow state (a state in which the flow of water as a fluid is maintained), a midway portion of a water pipe 1 (an example of a fluid pipe) buried in the ground is drilled to the pipe axis direction. 1 shows an example of a branch pipe joint installation method in which a branch pipe joint 57 is installed at a pipe cutting portion after disconnection. The work gate valve X (an example of a gate 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 gate 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, a halved lower case 10 mounted from below the water pipe 1 exposed in the excavation region K and a halved T-shaped upper case 11 mounted from above the water pipe 1 are bolted. The valve box 2 is connected to the branch pipe portion 11A of the upper case 11 with bolts, nuts and the like. Further, a first flange portion 21 that is formed to protrude radially outward over the circumferential direction of the end portion of the valve box 2 and a first flange portion that is formed to protrude radially outward over the circumferential direction of the end portion of the valve lid 3. The two flange portions 31 are fastened by bolts 21a and nuts 31a (an example of a fastening mechanism). The nut 31a may be provided on the first flange portion 21 side, and the bolt 21a may be provided on the second flange portion 31 side.

  As shown in FIGS. 2 to 3, the valve box 2 is configured by a rectangular housing in plan view, and in the center of the valve box 2, a pipe cutting part of the water pipe 1 after drilling is connected via a branch pipe part 11 </ b> A. A rectangular fluid circulation hole 22 through which tap water circulates is formed so as to penetrate in the vertical direction. A valve body moving space 20 in which a valve body 4 described later can move is formed inside the valve box 2, and the valve body moving space 20 communicates with the fluid circulation hole portion 22. The valve body movement space 20 includes an opening 23 having an opening on the valve lid 3 side, a bottom wall 24a and an upper wall 24b formed around the fluid circulation hole 22, and a side opposite to the valve lid 3. It is the area | region enclosed by the side wall 25 formed in the edge part.

  The valve box 2 is provided with a plurality of first through holes 26a (two in this embodiment) on the opening 23 side of the bottom wall 24a, and a plurality of second penetrations on the side wall 25 side of the bottom wall 24a. Holes 26b (two places in the present embodiment) are formed. The first through-hole portion 26a and the second through-hole portion 26b are configured by a boss portion that protrudes in a cylindrical shape with the outer surface of the bottom wall 24a facing downward, 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. A pair of first rails 27 are fixed to the bottom wall 24 a of the valve box 2 on both sides of the fluid circulation hole 22 along the moving direction of the valve body 4. The first rail 27 has a length from the bottom 23 a of the opening 23 to the end 22 a on the side wall 25 side of the fluid circulation hole 22. The first rail 27 includes a base portion 27a on which a wheel 40 of the valve body 4 described later slides, and a restricting portion 27b that is formed to protrude upward from the side of the base portion 27a and restricts the movement of the wheel 40 to the outside. (See FIG. 9).

  A plurality of pin members 28 are fixed to the first end surface 21 b of the first flange portion 21 corresponding to the peripheral edge of the opening 23 of the valve box 2. The pin member 28 has a tapered portion 28a that decreases in diameter 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. Note that the push bolt B3 may be omitted.

  As shown in FIGS. 4 to 5, the valve lid 3 is configured by a rectangular housing in plan view, and the plate-like valve body 4 is accommodated in the valve body accommodating space 30. Before the valve lid 3 is fastened to the valve box 2, a part of the valve body 4 (projecting portion 41) projects from the opening 30 a of the valve lid 3 to the outside. The valve body accommodating space 30 is an area surrounded by the opening 30a, the bottom portion 30b, the upper wall 30c facing the bottom portion 30b, and the side wall 30d on the base end portion 42a side of the valve body 4. Further, an operation unit 32 that moves the valve body 4 forward and backward along the horizontal direction (left and right direction in FIG. 10) is fixed to the side wall 30 d of the valve lid 3. The operation unit 32 rotates the operation shaft 32a and an operation shaft 32a formed with a male screw that is screwed into a female screw of a separate screw piece (not shown) fixed to the base end portion 42a of the valve body 4. And 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 configured by a boss portion that protrudes in a cylindrical shape with the outer surface of the bottom portion 30b facing downward, and a second bolt B2 (push-up) that pushes up the valve body 4 to the female screw of this boss portion. A male screw of an example of the mechanism is screwed. A pair of second rails 34 are fixed to the bottom 30 b of the valve lid 3 along the moving direction of the valve body 4 outside the third through hole 33. The second rail 34 has a length from the base end portion 42 a (near the side wall 30 d) of the valve body 4 to the opening 30 a of the valve lid 3. Similar to the first rail 27, the second rail 34 is formed with a base portion 34 a on which the wheel 40 of the valve body 4 slides and projects upward from the side of the base portion 34 a to restrict the movement of the wheel 40 to the outside. The control part 34b to perform is provided (refer 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.

  Moreover, when the 1st flange part 21 and the 2nd flange part 31 are made to oppose to the 2nd end surface 31b of the 2nd flange part 31 corresponded in the peripheral part of the opening 30a of the valve lid 3, it will be in the 1st end surface 21b. A plurality of recesses 35 are formed at positions corresponding to the fixed plurality of pin members 28. Furthermore, as shown in FIG. 6, a rotation restricting portion 36 that restricts the rotation of the nut 31 a composed of a hexagon nut is provided on the third end surface 31 c opposite to the second end surface 31 b of the second flange portion 31. The nut 31a protrudes in a posture parallel to one side.

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

  In addition, a plurality of wheels 40 (four in this embodiment) are fixed to the bottom of the valve body 4, and these wheels 40 are disposed at positions that are in sliding contact with the first rail 27 and the second rail 34. . The plurality of wheels 40 includes a pair of first wheels 40 a located on the front side in the traveling direction of the valve body 4 and a pair of second wheels 40 b 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 40 a is fixed to the projecting portion 41 projecting outside the valve lid 3, and the second wheel 40 b is disposed inside the valve lid 3. It is being fixed to the base end part 42a of the main-body part 42 located in this. These wheels 40 are configured to be rotatable around a shaft member 46 supported by a support member 45 fixed to the bottom of the valve body 4 (see FIG. 9).

  In the valve body 4, a plurality of pushed upper portions 43 (four in the present embodiment) pushed up by the first bolt B1 of the valve box 2 described above protrude outward from the protruding portion 41 and the base end portion 42a. Has been. The pushed 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, the valve lid 3 in which the valve body 4 is accommodated is assembled to the valve box 2 attached to the water pipe 1 at the construction site. For this reason, even when the weight of the work gate valve X as a whole is large, it is possible to suspend the valve box 2 and the valve body 4 separately by heavy equipment, so that the heavy equipment can be downsized and the construction cost can be reduced. it can. At this time, the protruding portion 41 of the valve element 4 protruding outside the valve lid 3 is inserted into the opening 23 of the valve box 2. Since this protrusion 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 40 a provided in the protrusion 41 and the first rail 27 provided in the opening 23 of the valve box 2 insert the protrusion 41 into the opening 23 of the valve box 2. The guide mechanism which guides is comprised. That is, when the protrusion 41 is inserted into the opening 23 of the valve box 2, the valve lid 3 can be positioned relative to the valve box 2 simply by placing the first wheel 40 a on the first rail 27. .

  As described above, since the protruding portion 41 of the valve body 4 is protruded outside the valve lid 3, the valve body 4 may slightly hang down with respect to the posture of the valve box 2. Therefore, in the present embodiment, a guide mechanism that guides the insertion of the protruding portion 41 into the opening 23 of the valve box 2 by the second bolt B2 that abuts the bottom surface of the valve body 4 and can push up the valve body 4. The push-up mechanism). That is, the protrusion 41 is 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 by pushing up the valve body 4 by the second bolt B2. Therefore, the axis of the valve lid 3 and the axis of the valve box 2 coincide. As a result, the fastening operation of 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 to adjust the valve. The valve lid 3 can be reliably assembled to the box 2.

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

  Further, as shown in FIG. 10, the valve member 2 of the projecting portion 41 is composed of the pin member 28 fixed to the first end surface 21 b of the valve box 2 and the recess portion 35 formed on the second end surface 31 b of the valve lid 3. The guide mechanism which guides the insertion into the opening 23 is configured. 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 axis of the valve body 4 and the axis of the valve lid 3 are aligned. . Further, since the tapered portion 28 a is provided at the tip of the pin member 28, it can be easily inserted into the concave portion 35. In addition, the recessed part 35 may be provided in the 1st end surface 21b of the valve box 2, and the pin member 28 may be fixed to the 2nd end surface 31b of the valve cover 3. FIG.

  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 portion 32 until the pushed upper portion 43 of the valve body 4 comes 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 sealing member S fixed to the upper surface of the valve body 4 is compressed by contacting the peripheral edge of the fluid circulation hole 22 of the valve box 2, thereby preventing the tap water from flowing out downstream of the valve body 4. Is 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 one flange portion 21 and the second flange portion 31 may be fixed by the sealing member. Therefore, as shown in FIG. 12, in this embodiment, the push bolt B <b> 3 inserted into the first flange portion 21 is rotated and brought into contact with the second flange portion 31 to separate the valve lid 3 from the valve box 2. I am going to do that. Thereby, even the valve lid 3 having a large weight can be easily removed.

  Then, the branch pipe joint installation method provided with the gate valve installation method which concerns on this embodiment is demonstrated using FIGS. The gate 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 periphery of the cutting area of the water pipe 1 is excavated, and the lower part of the excavating area K is hardened with the base concrete 51 and the water pipe 1 on the side of the cutting area is fixed to the pipe Secure with 52.
(2) The two split rings 53 are attached to predetermined positions of the water pipe 1 between the cutting area of the water pipe 1 and the pipe fixing concrete 52 (in this embodiment, two places on the side of the cutting area). .
(3) A cutting machine 54 is attached to the water pipe 1 between the pair of joint rings 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. A member 55 is attached to receive the loads 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, in a state where the valve lid 3 containing the valve body 4 is suspended by a crane or the like with the projecting portion 41 projecting to the outside, Move towards. At this time, the valve body is pushed up by the second bolt B <b> 2, and the shaft core of the valve body 4 and the shaft core of the valve lid 3 are aligned.

(7) The protrusion 41 is inserted into the opening 23 of the valve box 2 (see FIG. 10). At this time, the first wheel 40 a fixed to the protrusion 41 is disposed on the first rail 27 of the valve box 2, and the pin member 28 fixed to the first end surface 21 b of the valve box 2 is connected to the first of the valve lid 3. It inserts in the recessed part 35 formed in the two end surfaces 31b. As a result, the axis of the valve box 2 and the axis of the valve lid 3 coincide.
(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 bolts 21a and nuts 31a (see FIG. 1). Thereby, the installation of the work gate valve X is completed.

(9) As shown in FIG. 15, the upper housing 56 is connected to the work gate valve X in a sealed state, the electric operation rod 6 is connected to the cutting machine 54, and the cutting machine 54 is driven to connect 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, and the seal member S fixed to the upper surface of the valve body 4 is compressed to prevent the outflow of tap water to the downstream side (see FIG. 11).
(11) Remove the lid portion 56a of the upper housing 56, and remove the cutting machine 54 and the section from the electric operating rod 6.

(12) As shown in FIG. 16, the branch pipe joint 57 is attached to the electric operating 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 branch pipe joint 57 and the water pipe 1 are temporarily joined to the joint ring 53 by the push rod 58 provided in the upper case 11.
(13) The upper housing 56, the work gate 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 working gate valve X, as shown in FIG. 12, the push bolt B3 inserted into the first flange portion 21 is rotated to contact the second flange portion 31, and the valve lid 3 is attached to the valve box. Separate from 2. Then, the valve lid 3 and the valve box 2 are lifted separately by a crane or the like and removed. 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 is omitted.

[Other Embodiments]
1. The working gate valve X of the above-described embodiment has been described as a gate valve used in the branch pipe joint installation method, but is not particularly limited as long as it is a gate valve used in a method that needs to block the flow path. For example, the work gate 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. In the embodiment described above, as a guide mechanism for guiding the insertion of the protrusion 41 of the valve body 4 into the opening 23 of the valve box 2, (a) the first wheel 40a provided on the protrusion 41 and the opening of the valve box 2 are used. The first rail 27 provided in the portion 23, (b) the second bolt B2 that can contact the bottom surface of the valve body 4 and push up the valve body 4, and (c) the first end surface 21b of the valve box 2 are fixed. The pin member 28 and the recess 35 formed in the second end surface 31b of the valve lid 3 are configured by three types of mechanisms. Any one of these guide mechanisms may be used, or any two of them may be used.

3. At the work site, after moving the valve lid 3 with the protruding portion 41 of the valve body 4 accommodated therein toward the opening 23 of the valve box 2 attached to the water pipe 1, The valve lid 3 may be fastened.

4). The first rail 27 and the second rail 34 are not particularly limited as long as the wheel 40 of the valve body 4 can slide. For example, the restricting portions 27b and 34b in 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 as long as the valve body 4 can be pushed up, for example, formed by a wedge member. good.

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

  INDUSTRIAL APPLICABILITY The present invention can be used for a work gate valve for blocking a flow path and a method for installing a work gate valve.

1 Water pipe (fluid pipe)
2 Valve box 3 Valve lid 4 Valve body 21a Bolt (fastening mechanism)
21b First end surface 23 Opening portion 27 First rail (guide mechanism)
28 Pin member 31a Nut (fastening mechanism)
31b 2nd end surface 33 3rd through-hole part (hole part)
34 Second rail 35 Recess 40a First wheel (guide mechanism)
40b Second wheel 41 Protruding portion 42 Main body B2 Second bolt (push-up mechanism, guide mechanism)
B3 Presser bolt X Work gate valve (gate valve)

Claims (8)

A valve box attached to the fluid pipe;
A valve lid containing a plate-shaped valve body;
A fastening mechanism for fastening the valve box and the valve lid,
Before the valve lid is fastened to the valve box, the valve body is configured integrally with a main body portion located inside the valve lid and a protruding portion projecting outside the valve lid,
A gate valve provided with a guide mechanism for guiding insertion of the protrusion into the opening of the valve box.   The said guide mechanism has the 1st wheel fixed to the said protrusion part, and the 1st rail fixed to the bottom part of the said valve box, and the said 1st wheel slides. Gate valve.   The gate valve according to claim 1 or 2, wherein the guide mechanism has a push-up mechanism capable of pushing up the valve body.   The gate valve according to claim 3, wherein the push-up mechanism includes a bolt that is screwed into a hole formed in a bottom portion of the valve lid. A second wheel is fixed to the main body,
The gate valve according to any one of claims 1 to 4, wherein a second rail on which the second wheel slides is fixed to a bottom of the opening of the valve lid.   The guide mechanism is formed on a pin member fixed to a first end surface of any one of the valve box and the valve lid, and formed on a second end surface of the other one of the valve box and the valve lid, and the pin member The gate valve according to any one of claims 1 to 5, wherein the gate valve is configured by a recess into which can be inserted.   The gate valve according to any one of claims 1 to 6, wherein a push bolt for separating the valve cover from the valve box is provided at one end of the valve box or the valve cover. Attaching the valve box to the fluid pipe;
Moving the valve lid containing the plate-shaped valve element toward the opening of the valve box;
A gate valve installation method comprising: a step of fastening the valve box and the valve lid.

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