JP2023155435A - Assembling method for installation device for straightening body - Google Patents

Abstract

To provide an assembling method for an installation device for a straightening body, capable of reducing a load on a crane.SOLUTION: A mounting method is provided for the installation device for a straightening body 10, which includes a casing 2 to be mounted to a fluid pipe 1 in a sealed manner, a working valve 4 mounted in an opening part 2a of the casing 2 and capable of opening/closing the inside of the casing 2, a cutter 52 mounted to the working valve 4 for cutting the fluid pipe 1 inside the casing 2, and a cutting machine 5 having a driving part 8 for driving the cutter 52, whereby the straightening body 10 for controlling a flow path of the fluid pipe 1 is installed in the casing 2 in a constantly flowing state. At least either the cutting machine 5 or the straightening body 10 is formed of a plurality of split bodies. When the casing 2 is mounted to the fluid pipe 1 in a sealed manner, supporting means 9 is provided for supporting the weight of the casing 2 and its vicinity. After the casing 2 is mounted to the fluid pipe 1 in a sealed manner, the split bodies are assembled on the casing 2, sequentially.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for assembling an installation device for installing a fluid control device in a housing that seals a fluid pipe in a non-flow state.

When placing a fluid control device such as a valve or plug in a fluid pipeline, it is generally done to cut a part of the fluid pipe that makes up the fluid pipeline and install the fluid control device at the cut point. ing. As a cutting method for cutting a fluid pipe, a housing is attached to the fluid pipe in a sealed manner, a work valve that can be opened and closed inside the housing is installed at the opening of the housing, and the work valve has a cutter and a drive unit. It is known that a cutter is installed and a cutter is advanced by a drive unit with a work valve opened to cut a part of a fluid pipe in a state where no flow is interrupted within a housing.

Furthermore, as a method for installing a fluid control device at a location where a fluid pipe is cut by the method described above, for example, as shown in Patent Document 1, a casing, a work valve, and an insertion machine attached to the work valve are used. There is a fluid control installation method using the following, in which the fluid control is advanced by an insertion machine with the work valve open, and the fluid control is installed in the housing in a state where the flow is not interrupted. In such a fluid control installation method, each component such as a housing, a working valve, a fluid control, etc. is suspended by a crane, transported to the installation position, and assembled into a fluid pipe (for example, Patent Document (see 1).

JP 2013-108594 (Page 11, Figure 9)

However, when installing a fluid control device as in Patent Document 1, especially when the diameter of the fluid pipe is large, a housing that fits the fluid pipe externally, a working valve, and a control installed inside the housing are required. As the fluid also becomes larger, it is necessary to prepare a large crane with high lifting capacity, and the range of movement of the crane and installation space becomes large, so it is necessary to secure a large space for the installation work of the fluid control system. There was a problem. In particular, when a hole saw is used as a cutting machine as in Patent Document 1, a hole saw with a diameter larger than the outside diameter of the fluid pipe is required. The weight of the fluid control equipment installed increased, making it unavoidable to make the crane larger.

The present invention has been made in view of these problems, and an object of the present invention is to provide a method for assembling a fluid control installation device that can reduce the load on a crane.

In order to solve the above problems, a method for assembling a fluid control installation device of the present invention includes:
a housing that is attached to the fluid pipe in a sealed manner; a work valve that is attached to the opening of the housing and is capable of opening and closing the inside of the housing; A fluid control installation device for installing a fluid control for controlling the flow path of the fluid pipe in the housing in an uninterrupted state, comprising a cutter for cutting the fluid, and a cutting machine having a drive unit for driving the cutter. An assembly method,
At least one of the work valve, the cutting machine, and the fluid control is composed of a plurality of divided bodies, and after the housing is attached to the fluid pipe in a sealed manner, the divided body is attached to the housing. It is characterized by being assembled sequentially.
According to this feature, the plurality of divided bodies constituting the work valve, cutting machine, or fluid control can be transported separately by a crane, reducing the load on the crane that suspends them and downsizing the crane. I can do it.

A first divided body among the plurality of divided bodies is locked to a locking part provided on the housing, and the remaining second divided body is locked to the first divided body that is locked to the locking part. It is characterized by assembling divided bodies.
According to this feature, in a stable state in which the first divided body among the plurality of divided bodies is locked to the locking part of the housing, the remaining second divided body is attached to the first divided body with high precision. Can be installed.

The present invention is characterized in that the second divided body is assembled to the first divided body while the second divided body is connected to a crane.
According to this feature, it is possible to prevent the second divided body from falling when assembling the second divided body to the first divided body, resulting in high safety.

The cutting machine includes the cutter and the drive unit as the plurality of divided bodies, and the drive unit is connected to allow the fluid control to be inserted into the housing.
According to this feature, since the drive section and the cutter constituting the cutting machine are separated, the drive section for driving the cutter can be used as a fluid control insertion tool.

It is a side sectional view showing how a valve box of a work valve is attached to a case in an example. It is a side sectional view showing how a valve body and a valve stem are attached to a valve box. FIG. 3 is a side sectional view showing how the mounting flange tube is attached to the work valve in the process of installing the cutting machine. FIG. 3 is a side cross-sectional view showing how a cutter and a lid are attached to the mounting flange cylinder in the step of installing the cutting machine. FIG. 7 is a side cross-sectional view showing how the lid body is fixed to the mounting flange tube in the step of installing the cutting machine. It is an explanatory view showing the structure of a drive mechanism. FIG. 3 is a side sectional view showing how the shaft member and the cutter are connected in the process of installing the cutting machine. FIG. 3 is a side sectional view showing how the jack and fixing jig are removed in the process of installing the cutting machine. FIG. 6 is a side sectional view showing how the case portion of the drive mechanism and the lid body are connected in the step of installing the cutting machine. FIG. 3 is a side sectional view showing how a fluid pipe is cut by a cutting machine. FIG. 3 is a side cross-sectional view showing a state in which a section of the fluid tube is collected. FIG. 3 is a side cross-sectional view showing how the cylindrical member is attached to the working valve in the process of installing the valve introducing machine. FIG. 3 is a side cross-sectional view showing how the partition wall, opening/closing shaft, and valve body of the butterfly valve are attached to the cylindrical member in the process of installing the valve introduction device. FIG. 3 is a side cross-sectional view showing a state in which a butterfly valve is constructed by attaching an upper lid part in a step of installing a valve introducing machine. FIG. 3 is an explanatory diagram showing how the mounting flange tube is attached to the cylindrical member in the step of installing the valve introduction device. FIG. 3 is a side sectional view showing how a valve hanging fitting and a lid body are attached in the process of installing the valve introducing machine. FIG. 6 is a side cross-sectional view showing how the lid body is fixed to the mounting flange cylinder in the step of installing the valve introduction device. FIG. 6 is a side cross-sectional view showing how the shaft member and the valve hanging fitting are connected in the process of installing the valve introducing machine. FIG. 3 is a side cross-sectional view showing how the jack and fixing jig are removed in the process of installing the valve introducing machine. FIG. 3 is a side cross-sectional view showing how the butterfly valve and the valve hanging fitting are connected in the process of installing the valve introducing machine. FIG. 3 is a side cross-sectional view showing a state in which a butterfly valve is installed at a cut point of a fluid pipe using a valve introducing machine. FIG. 3 is a side sectional view showing the valve hanging fitting pulled up into the cylindrical member and the mounting flange tube. 7 is a side sectional view showing a working valve in Modification 1. FIG. FIG. 7 is a side sectional view showing a working valve in Modification 2. FIG. FIG. 7 is a side sectional view showing a cutting machine in Modification 3. (a) is a side sectional view showing a cutting machine in modification 4, (b) is a view taken along arrow A, and (c) is a BB sectional view.

EMBODIMENT OF THE INVENTION The form for carrying out the assembly method of the installation device of the fluid control which concerns on this invention is demonstrated below based on an Example.

In the embodiment, a series of steps from cutting off a predetermined location of an existing fluid pipe 1 constituting a flow path component and installing a butterfly valve 10 (fluid control) at the cut location are shown in FIGS. 1 to 26. Refer to and explain.

As shown in FIG. 1, a predetermined portion of a fluid pipe 1 buried underground is excavated, and a casing 2 having a two-part structure having a branch portion 2a opening upward is hermetically enclosed. Note that the fluid in the fluid pipe 1 may be, for example, tap water, industrial water, sewage, or the like, as well as gas or a gas-liquid mixture of gas and liquid. Further, although the housing 2 has a two-part structure in this embodiment, it may have another multi-part structure, and the divided housings may be joined by welding or bolts via packing. .

The fluid pipe 1 is a steel pipe and has a substantially circular cross-sectional shape. The fluid pipe according to the present invention may be made of ductile cast iron, other cast iron, other metals, concrete, vinyl chloride, polyethylene, polyolefin, or the like. Furthermore, the inner circumferential surface of the fluid tube may be coated with an epoxy resin layer, mortar, plating, etc., or the inner circumferential surface of the fluid tube may be coated with a suitable material by powder coating.

Furthermore, when installing the casing 2 to the fluid pipe 1 in a sealed manner, concrete foundations 9, 9 are formed below the casing 2 to support the weight around the casing 2 and prevent bending of the fluid pipe 1. To prevent. Note that the concrete foundations 9 are not limited to the concrete foundations 9, and a jack or the like may be used as long as it can support the weight of the casing 2, the cutting machine 5, and the valve introducing machine 6, which will be described later.

Next, a process of attaching the working valve 4 capable of closing the opening of the branching part 2a to the branching part 2a (opening part) of the housing 2 will be explained. First, as shown in FIG. 1, the valve box 41 (first divided body) constituting the working valve 4 is suspended from above by a wire W and a hanging tool C equipped with a hook that is suspended by a crane (not shown). The valve body 41 is then placed on the flange 2b of the branch portion 2a, and the flange 2b and the valve body 41 are fixed with bolts and nuts (not shown) while adjusting the position of the valve body 41 on the flange 2b. It should be noted that the crane used in this example is preferably a mobile rough terrain crane, for example, and needless to say, its size will increase depending on its lifting capacity, and it will be able to lift the heaviest member among the members described below. Possible specifications are selected considering the permissible lifting loads at each turning radius. Furthermore, the installation area of the crane, including outriggers and the like, is often larger than the excavation area of the fluid pipe 1.

In this embodiment, even after the valve box 41 is placed on the flange 2b of the branch portion 2a, the wire W is connected to the crane with the wire W slightly loosened to ensure safety. However, the present invention is not limited to this, and the hanging tool C and wire W may be removed from the valve box 41. Further, in order to make it easier to adjust the position of the valve box 41, the valve box 41 may be slightly suspended by a crane and then adjusted relative to the flange 2b.

This valve box 41 has a substantially cylindrical shape penetrating in the vertical direction, and has a slide groove 41b extending substantially horizontally from an opening 41a provided on one side. A valve seat portion 41c is formed on the side opposite to the opening portion 41a. The weight of the valve box 41 in this embodiment is approximately 4500 kg. Note that since an O-ring (not shown) is pressed between the flange 2b and the valve box 41, the branch portion 2a and the valve box 41 are connected in a sealed manner. Hereinafter, the weight of each member is merely an example, and can be changed to an appropriate weight.

Next, as shown in FIG. 2, the valve body 42, valve cover 43, and valve stem 44 (second divided body) constituting the working valve 4 are suspended by a hanging tool C and a wire W in a unitized state. and lower it to the side of the opening 41a of the valve box 41. Then, in this suspended state, the valve cover 43 is fixed to the side of the valve box 41 with bolts and nuts (not shown) (see FIG. 3). Specifically, the valve body 42 is attached by a valve stem 44 so as to be movable back and forth between a position where it is housed in the valve cover 43 and a position where it protrudes from the valve cover 43. In this case, a part of the valve body 42 (the end on the side opposite to the valve stem 44 (valve box 41 side)) protrudes from the opening 43a of the valve cover 43.

When fixing the valve cover 43 to the side of the valve box 41, insert the protruding portion of the valve body 42 that protrudes from the opening 43a of the valve cover 43 into the opening 41a of the valve box 41, and then attach the valve cover 43 to the side of the valve box 41. The valve cover 43 is slid horizontally until they touch each other, and the valve cover 43 and the valve box 41 are fixed with bolts and nuts (not shown). The weight of the valve body 42, valve cover 43, and valve stem 44 in this embodiment is approximately 6000 kg in a unitized state.

In addition, since the packing S1 is pressure-contacted in the circumferential direction between the valve cover 43 and the valve box 41, the sealing performance between the valve cover 43 and the valve case 41 can be ensured (as shown in the enlarged part in FIG. 3). reference). In this embodiment, the packing S1 is press-fitted into the groove provided on the valve cover 43 side, but the present invention is not limited to this. The packing S1 may be press-fitted.

In this embodiment, the valve body 42, the valve lid 43, and the valve stem 44, which are unitized, are attached to the valve box 41 while being suspended by the hanging tool C and the wire W, but the present invention is not limited to this. For example, a mounting table may be disposed near the valve box 41, and the valve body 42, valve cover 43, and valve stem 44 may be placed on the mounting table and then attached to the valve box 41.

In this way, the working valve 4 has a first divided body (approximately 4,500 kg) consisting of the valve box 41, and a second divided body (approximately 6,000 kg) consisting of the valve body 42, valve cover 43, and valve stem 44. ), and the working valve 4 is constructed by assembling these parts in order to the branch part 2a of the housing 2. In other words, since the first divided body and the second divided body can be transported separately using the hanging tool C and the wire W, it is possible to transport the first divided body and the second divided body separately using the hanging tool C and the wire W. Compared to the valve 4), the load on the crane can be distributed and reduced, so the crane can be made smaller and the work space in which the work valve 4 is installed can be saved. Moreover, since the load on the hanging tool C and the wire W is also reduced, there is no need to prepare a thick hanging tool C and wire W, and the cost of the hanging tool C and wire W to be used can also be suppressed.

Furthermore, as will be described later, when a hole saw such as the cutter 52 of this embodiment is used as a means for cutting the fluid pipe 1, the diameter of the hole saw is larger than the outer diameter of the fluid pipe 1. Although the structure of the valve 4 also becomes larger, even in such a case, the first divided body and the second divided body can be transported separately by the hanging tool C and the wire W, so that the crane can be suitably downsized.

Here, from the viewpoint of workability, a configuration in which the valve body 42, the valve cover 43, and the valve stem 44 are fixed to the valve box 41 as a unit is illustrated, but the present invention is not limited to this, and for example, the valve body 42, the valve stem 44, The valve cover 43 and the valve stem 44 may be separately attached to the valve box 41 in this order to further distribute and reduce the load on the crane.

Further, the working valve 4 is divided into a valve box 41 installed above the branch part 2a, and a valve body 42, a valve cover 43, and a valve stem 44 that bulge out laterally from the valve box 41. After fixing the valve box 41 to the branch part 2a, the valve body 42, valve cover 43, and valve stem 44 are fixed to the valve box 41, so when installing the valve box 41 in the branch part 2a, the weight balance The hanging load does not tilt, and the valve box 41 can be easily installed at the branch part 2a. Also, when connecting the valve body 42, valve cover 43, and valve stem 44 to the valve box 41, the weight balance prevents the suspended load from tilting, and the valve body 42, valve cover 43, and valve stem 44 are connected to the valve case 41. connection becomes easier. Furthermore, since it is not necessary to suspend the working valve 4 at multiple locations in order to maintain the weight balance of the working valve 4, the working space required for installing the working valve 4 can be suitably saved.

When connecting the valve body 42, valve lid 43, and valve stem 44 to the valve box 41, the valve body 42 is inserted into the opening 41a of the valve box 41, and the valve lid 43 is moved sideways until it abuts against the valve box 41. Since the valve body 42 is guided by the valve box 41 by sliding the valve body 42 from the valve body 41, the valve body 42, the valve cover 43, and the valve stem 44 can be accurately arranged with respect to the valve box 41.

In this embodiment, the valve cover 43 and the valve box 41 are fixed with bolts and nuts, but the present invention is not limited to this, and they may be fixed with another fixing means such as a vise. , may be fixed by welding or the like.

Next, a process of installing the cutting machine 5 for cutting the fluid pipe 1 above the working valve 4 will be explained. As shown in FIG. 3, first, the mounting flange cylinder 51 (cylindrical body) penetrating in the vertical direction is suspended by a hanging tool C and a wire W and lowered to above the valve box 41. The mounting flange cylinder 51 is fixed to the mounting flange cylinder 51 with bolts and nuts (not shown). The weight of the mounting flange tube 51 in this embodiment is approximately 2600 kg. Further, since an O-ring (not shown) is pressed between the mounting flange cylinder 51 and the valve box 41, the valve box 41 and the mounting flange cylinder 51 are connected in a sealed manner.

In this embodiment, even after the mounting flange tube 51 is placed on the valve box 41, the wire W is slightly loosened and connected to a crane (not shown) to ensure safety. However, the present invention is not limited to this, and the hanging tool C and wire W may be removed from the mounting flange cylinder 51. Furthermore, in order to facilitate position adjustment of the mounting flange cylinder 51, the position of the mounting flange cylinder 51 may be adjusted with respect to the valve box 41 while being slightly suspended by a crane.

Next, as shown in FIG. 4, the cutter 52 is temporarily installed on the mounting flange cylinder 51. Specifically, with the lid 53 of the mounting flange cylinder 51 connected above the cutter 52, the cutter 52 is suspended by a hanger C and a wire W and lowered to above the mounting flange cylinder 51. The cutter 52 consists of a cylindrical member 52a equipped with a cutting blade at the peripheral end, and a center drill 52b that is disposed coaxially with the cylindrical member 52a and protrudes further than the drilling blade. is fixed. Further, above the cylindrical member 52a and the center drill 52b, an adapter 54 having an annular protrusion 54a formed at its upper end is attached so as not to rotate relative to each other.

Further, the lid body 53 has a through hole 53a formed in the center thereof that penetrates in the vertical direction, and an adapter 54 is inserted into the through hole 53a. In addition, the lid body 53 has a plurality of recesses 53b formed in the circumferential direction, which are recessed from the inner peripheral surface of the through hole 53a in the outer radial direction, and the recesses 53b are movable in the radial direction of the through hole 53a. A fixing jig 55 is provided. The cutter 52 and the lid body 53 are integrated by the fixing jig 55 protruding in the inner diameter direction of the through hole 53a and engaging with the lower surface of the annular protrusion 54a of the adapter 54.

In this example, the weight of the cutter 52 is approximately 2910 kg, the weight of the lid 53 is approximately 1900 kg, the weight of the adapter 54 is approximately 290 kg, and the total weight of these is approximately It weighs 5,100 kg.

As shown in FIG. 5, with the lid 53 placed above the mounting flange cylinder 51, the mounting flange cylinder 51 and the lid 53 are aligned and fixed with bolts and nuts (not shown). At this time, the cutter 52 is housed inside the mounting flange cylinder 51.

Furthermore, as shown in the enlarged part of FIG. 5, since the packing S2 is pressure-contacted in the circumferential direction between the mounting flange cylinder 51 and the lid body 53, the connection between the mounting flange cylinder 51 and the lid body 53 is It is possible to ensure a tight seal between the parts. In this embodiment, the packing S2 is press-fitted into a groove provided on the lid body 53 side, but the present invention is not limited to this. A packing S2 may be press-fitted into the hole.

In this embodiment, even after the lid 53 is placed on the mounting flange cylinder 51, the wire W is connected to the crane with the wire W slightly loosened to ensure safety. The present invention is not limited to this, and the hanging tool C and wire W may be removed from the lid body 53. Furthermore, in order to facilitate position adjustment of the mounting flange cylinder 51, the position of the mounting flange cylinder 51 may be adjusted with respect to the valve box 41 while being slightly suspended by a crane.

Next, the drive mechanism 8 (drive section) of the cutting machine 5 is connected to the cutter 52. First, the structure of the drive mechanism 8 will be explained based on FIG. 6.

As shown in FIG. 6, the drive mechanism 8 includes a shaft member 81, a gripping member 82 that can grip or release the shaft member 81, and moves the gripping member 82 forward and backward within an axial range of the shaft member 81. It is mainly composed of an advancing/retracting member 83, a regulating member 84 that can restrict or release the movement of the shaft member 81 at a position below the advancing/retracting member 83, and a base member 85 to which the advancing/retracting member 83 and the regulating member 84 are attached. ing. The weight of the drive mechanism 8 in this example is approximately 6060 kg.

The base member 85 is provided with a plurality of support columns 85a that stand upwardly, and the reciprocating member 83 is attached to be slidable in the vertical direction along the support columns 85a. That is, by gripping the shaft member 81 with the grip member 82 and moving the reciprocating member 83 along the support portion 85a in this state, the shaft member 81 can be slid in the vertical direction.

Further, below the base member 85, a cylindrical case portion 86 into which the shaft member 81 can be inserted is provided. A packing S3 is provided on the inner circumferential surface of the case portion 86 to seal the space between the packing S3 and the outer circumferential surface of the shaft member 81, and an annular groove 86a is formed on the lower surface of the case portion 86. An annular packing S4 is press-fitted into the annular groove 86a.

Further, a rotary motor 87 is fixedly attached to a part of the advancing/retracting member 83, and the rotary motor 87 applies a rotational force to the gripping member 82 which is gripping the shaft member 81. Rotation can be transmitted, and the cutter 52 can be rotated by rotating the shaft member 81. In addition, by preparing a plurality of shaft members 81, the length in the axial direction can be increased by adding them in the axial direction, and because of this adding structure, the weight and height can be reduced. .

As shown in FIG. 7, when connecting the drive mechanism 8 to the cutter 52, a plurality of jacks 7 (spacers) are arranged in the circumferential direction of the upper flange 53c of the lid body 53, and the shaft member 81 is placed in a predetermined position. The shaft member 81 is advanced downward in length so that the lower end of the shaft member 81 protrudes below the case part 86, the drive mechanism 8 is suspended by the hanging tool C and the wire W, and the case part 86 is placed on the jack 7. do. Next, an operator accesses through the gap between the case portion 86 formed by the jack 7 and the upper flange 53c of the lid body 53, and connects the shaft member 81 and the adapter 54 with the bolt nut N1.

In this embodiment, even after the drive mechanism 8 is placed on the jack 7, the drive mechanism 8 is connected to the crane with the wire W slightly loosened to ensure safety. The present invention is not limited to this, and the hanging tool C and the wire W may be removed from the drive mechanism 8. Further, in order to facilitate position adjustment of the drive mechanism 8, the position adjustment between the shaft member 81 and the adapter 54 may be performed while the drive mechanism 8 is slightly suspended by a crane.

Next, as shown in FIG. 8, the drive mechanism 8, adapter 54, and cutter 52 are lifted slightly upward by a crane, the jack 7 is removed from between the case part 86 and the lid body 53, and the fixing jig 55 is moved into the recess. 53b. At this time, the cutter 52 (approximately 2910 kg), the adapter 54 (approximately 290 kg), and the drive mechanism 8 (approximately 6060 kg) are lifted by the crane, so the weight applied to the crane is approximately 9260 kg. At this time, a plurality of jacks 7 (spacers) are arranged in the circumferential direction of the lower flange 53d of the lid body 53, and the drive mechanism 8 is placed on the jacks 7 to receive the weight, and the drive mechanism 8 is placed on the crane. Weight may be reduced.

Subsequently, as shown in FIG. 9, the drive mechanism 8 is lowered by a crane so that the case part 86 is placed on the upper flange 53c of the lid body 53, and the case part 86 and the lid body 53 are removed using bolts and nuts (not shown). and fix it. As a result, the mounting flange tube 51, the cutter 52, the lid 53, the adapter 54, and the drive mechanism 8 constitute the cutting machine 5, and the casing 2, the work valve 4, and the cutting machine 5 constitute the cutting device. At this time, it goes without saying that the center drill 52b is adjusted so as not to come into contact with the valve body 42.

Moreover, when the case part 86 and the lid body 53 are fixed, the packing S4 is pressed between the case part 86 and the upper flange 53c of the lid body 53, so that the seal between the case part 86 and the lid body 53 is sealed. can ensure sex. In this embodiment, the packing S4 is press-fitted into the annular groove 86a formed on the lower surface of the case portion 86, but the present invention is not limited to this. A packing S4 may be press-fitted into the annular groove.

In this embodiment, even after the case part 86 is placed on the lid body 53, it is connected to the crane with the wire W slightly loosened to the drive mechanism 8 to ensure safety. However, the suspension C and the wire W may be removed from the drive mechanism 8. Furthermore, in order to facilitate position adjustment of the drive mechanism 8, the position adjustment between the case portion 86 and the lid body 53 may be performed with the drive mechanism 8 slightly suspended by a crane.

Next, the process of cutting the fluid pipe 1 with the cutting machine 5 will be explained. As shown in FIG. 10, first, the valve body 42 of the working valve 4 is retracted to open the branch portion 2a, and the aforementioned gripping member 82 grips the outer peripheral surface of the rear end side of the shaft member 81. Next, the rotary motor 87 is driven to rotate the shaft member 81 and the cutter 52. Then, the reciprocating member 83 is advanced toward the fluid pipe 1 with the shaft member 81 and the cutter 52 being rotated. According to this, first, the center drill 52b of the cutter 52 drills the pipe wall of the fluid pipe 1.

The forward movement of the shaft member 81 and the cutter 52 is performed in the range from the position where the gripping member 82 grips the shaft member 81 to the position close to the regulating member 84, and the shaft member 81 slides on the packing S3 and moves forward. The movement of the shaft member 81 and the cutter 52 after the progress movement is completed is restricted by the restriction member 84. Thereafter, the rotation of the shaft member 81 by the rotary motor 87 is stopped, another shaft member 81' is connected to the upper end of the shaft member 81, and the above steps are repeated, so that the cylindrical member 52a of the cutter 52 cuts the fluid pipe 1. . At this time, it is not necessarily necessary to connect another shaft member 81', and the cutting may be completed using a shaft member 81 of a predetermined length in advance.

As shown in FIG. 11, when the fluid pipe 1 is cut by the cutter 52, a piece 1a formed by cutting the fluid pipe 1 is held in the cylindrical member 52a. Then, by retracting the shaft member 81 and cutter 52 in the reverse order of the above steps, they are pulled up together with the piece 1a into the mounting flange cylinder 51, and the branch part 2a is closed by the valve body 42 of the work valve 4. , the cutting operation of the fluid pipe 1 is completed.

As explained above, after attaching the housing 2 to the fluid pipe 1 in a sealed manner and attaching the work valve 4 to the branch part 2a of the housing 2, the cutter 52, the lid body 53, and the adapter 54 are attached to the work valve 4. The cutting machine 5 is constructed by installing the cutter 52 as a unit, and attaching the drive mechanism 8 to the cutter 52, the lid body 53, and the adapter 54 installed on the work valve 4. According to this, the cutter 52, lid body 53, adapter 54 (approximately 5100 kg) and drive mechanism 8 (approximately 6060 kg) of the cutting machine 5 can be transported separately, so the work valve 4 can be transported with the cutting machine 5 assembled. Compared to the case where the cutting machine 5 is installed (approximately 11,160 kg), the load on the crane can be distributed and reduced, so the crane can be downsized and the work space where the cutting machine 5 is installed can be saved.

In particular, when a hole saw such as the cutter 52 is used as in the present embodiment, a cylindrical member 52a having a diameter larger than that of the fluid pipe 1 is required, which increases the size of the cutting machine 5. Even in this case, since the cutter 52, the lid body 53, the adapter 54, and the drive mechanism 8 are installed separately, the load on the crane can be distributed and the crane can be suitably downsized.

Note that from the viewpoint of workability, the cutter 52, the lid 53, and the adapter 54 are fixed to the mounting flange tube 51 as a unit. However, the present invention is not limited to this, and for example, the cutter 52, the lid 53 and the adapter 54 may be attached to the mounting flange tube 51 separately and in order to further distribute and reduce the load on the crane. In this case, a holding means for holding the cutter 52 within the mounting flange tube 51 may be provided.

In addition, a mounting flange cylinder 51 (approximately 2,600 kg) capable of accommodating a cutter 52 is installed on the work valve 4, and in order to install the cutter 52, lid body 53, and adapter 54 in the installation flange cylinder 51, a guide is provided to the installation flange cylinder 51. The cutter 52 is inserted while being moved, and the cutter 52 can be positioned with high precision in the fluid pipe 1. Further, the load on the crane can be reduced compared to the case where the cutter 52, the lid body 53, the adapter 54, and the mounting flange cylinder 51 are installed in the work valve 4 as a unit (approximately 7700 kg).

Further, since the cutter 52 is accommodated in the mounting flange tube 51 with the cutter 52 and the lid body 53 connected by the fixing jig 55, and the lid body 53 and the attachment flange tube 51 are fixed, The cutter 52 can be held using the lid body 53 that seals the mounting flange cylinder 51. According to this, there is no need to prepare a special jig for holding the cutter 52 separately from the lid body 53, and the structure can be simplified.

Further, after connecting the cutter 52 (adapter 54) and the shaft member 81 of the drive mechanism 8 through the through hole 53a of the lid 53 with the case portion 86 of the drive mechanism 8 separated from the lid 53, The case portion 86 is connected to the lid body 53 in a sealed manner. According to this, since the cutter 52 and the shaft member 81 can be connected through the gap between the case portion 86 of the drive mechanism 8 and the lid body 53, a working hole etc. for connecting the cutter 52 and the shaft member 81 can be formed. It is not necessary to form this on the case portion 86 or the lid body 53, and the structure can be simplified. Furthermore, since the case portion 86 and the lid body 53 are connected after the cutter 52 and the shaft member 81 are connected, the case portion 86 and the lid body 53 are guided by the adapter 54 and the shaft member 81, and are kept in a stable state. You can perform the connection work with .

Furthermore, with the jack 7 as a spacer disposed between the case part 86 and the lid 53, the operator can access from the gap formed by the jack 7 between the case part 86 and the upper flange 53c of the lid 53. Since the shaft member 81 and the adapter 54 are connected by the bolt and nut N1, it is possible to prevent the drive mechanism 8 from falling during the connection work between the shaft member 81 and the adapter 54, resulting in high safety. In addition, by placing the case part 86 on the jack 7, the case part 86 becomes more stable than when suspended by the hanging tool C and the wire W, so that it is easier to connect the shaft member 81 and the adapter 54.

Although not shown in the drawings, first, the drive mechanism 8 is removed from the lid 53 with the branch portion 2a closed by the valve body 42 of the work valve 4, and the lid 53 and cutter 52 are attached to the mounting flange together with the piece 1a. By removing the cylinder 51 and the mounting flange cylinder 51 from the work valve 4, the removal work of the cutting machine 5 is completed. In this way, since each member constituting the cutting machine 5 can be transported separately by the crane, the load on the crane during the removal work of the cutting machine 5 can be reduced.

Next, a process of installing the valve introduction device 6 for installing the butterfly valve 10 at the location where the fluid pipe 1 is cut will be explained. As shown in FIG. 12, first, with the branch part 2a closed by the valve body 42 of the working valve 4, the cylindrical member 61 (cylindrical body) penetrating in the vertical direction is suspended by the hanging tool C and the wire W. The cylindrical member 61 is fixed above the working valve 4 with bolts and nuts (not shown) or the like. The weight of the cylindrical member 61 in this example is approximately 3000 kg. Further, since an O-ring (not shown) is pressed between the cylindrical member 61 and the working valve 4 (valve box 41), the cylindrical member 61 and the working valve 4 are connected in a sealed manner.

In this embodiment, even after the cylindrical member 61 is placed on the work valve 4, the wire W is connected to the cylindrical member 61 to the crane in a slightly loosened state to ensure safety. However, the suspension C and the wire W may be removed from the cylindrical member 61. Furthermore, in order to facilitate positional adjustment of the cylindrical member 61, the positional adjustment between the valve box 41 and the cylindrical member 61 may be performed while the cylindrical member 61 is slightly suspended by a crane.

Next, a process of temporarily installing the butterfly valve 10 on the cylindrical member 61 will be explained. First, the structure of the butterfly valve 10 will be explained based on FIG. 14.

As shown in FIG. 14, the butterfly valve 10 controls the flow path of the fluid pipe 1 into a state in which fluid can pass through and a state in which fluid cannot pass therethrough, and includes a partition wall 11 having an opening approximately in the center, and a partition wall 11 having an opening approximately in the center. An opening/closing shaft 12 rotatably attached to the upper end of the wall 11, a valve body 13 provided so as to be able to rotate around the opening/closing shaft 12 to open and close the opening of the partition wall 11, and the upper end of the partition wall 11. A substantially circular upper cover portion 14 (lid body portion) extending in a substantially horizontal direction is connected in a sealing manner to the upper cover portion 14 . A packing S5 is fixed to the partition wall 11 over both sides and the bottom thereof, and a packing S6 is fixed to the upper lid part 14 over the entire circumference of its outer circumferential surface, and the packings S5 and S6 are continuous. connected like this. Incidentally, the total weight of the butterfly valve 10 in this embodiment is approximately 9540 kg. Furthermore, it goes without saying that the space between the partition wall 11 and the upper lid part 14 is sealed with a packing or the like.

As shown in FIG. 13, when temporarily installing the butterfly valve 10 on the cylindrical member 61, first, the hanging tool C and It is suspended by a wire W and lowered to a position where it is accommodated in the cylindrical member 61. At this time, the valve body 13 is arranged so as to be substantially parallel to the tube axis direction (with the opening of the partition wall 11 open).

Then, the locking member 62 (locking portion, holding portion) is inserted from the outside through a plurality of windows 61 a formed in the circumferential direction of the cylindrical member 61 so as to partially protrude into the cylindrical member 61 . As a result, the protruding piece 11a that protrudes outward from the partition wall 11 is placed (locked) on the tip of the locking member 62, and the partition wall 11, opening/closing shaft 12, and valve body 13 are connected to the cylindrical member 61. It will be held at Note that since a recess 62a that can accommodate a portion of the valve body 13 is formed in the lower part of the distal end of the locking member 62, the locking member 62 and the valve body 13 do not interfere with each other.

Next, as shown in FIG. 14, the upper lid part 14 is suspended by a hanging tool C and a wire W and placed on the upper part of the partition wall 11 with the opening/closing shaft 12 inserted therethrough. Then, the butterfly valve 10 is constructed by sealingly connecting the upper lid part 14 and the partition wall 11 by a fixing means (not shown).

In this embodiment, even after the upper cover part 14 is placed on the partition wall 11, the wire W is connected to the crane with the wire W slightly loosened to ensure safety. The present invention is not limited to this, and the hanging tool C and wire W may be removed from the upper lid part 14. Further, in order to make it easier to adjust the position of the upper lid part 14, the positions of the upper lid part 14, the partition wall 11, the opening/closing shaft 12, and the valve body 13 may be adjusted while the upper lid part 14 is slightly suspended by a crane. good.

Furthermore, in this embodiment, the butterfly valve 10 is constructed on the cylindrical member 61 by fixing the upper lid portion 14 to the integrated partition wall 11, opening/closing shaft 12, and valve body 13, but The butterfly valve 10 may be configured by separately installing the partition wall 11, the opening/closing shaft 12, the valve body 13, and the upper lid part 14 in this order. Alternatively, the butterfly valve 10 may be configured by integrating the partition wall 11 and the valve body 13, integrating the opening/closing shaft 12 and the upper lid part 14, and assembling them. That is, if at least the upper lid part 14 is separated from other members (main body part) and the butterfly valve 10 is constructed by assembling them, it can be freely changed.

Next, as shown in FIG. 15, the mounting flange tube 63 penetrating in the vertical direction is suspended by the hanging tool C and the wire W and lowered to above the cylindrical member 61. 63 is fixed with bolts and nuts (not shown). The weight of the mounting flange tube 63 in this embodiment is approximately 2600 kg.

In this embodiment, even after the mounting flange cylinder 63 is placed on the cylindrical member 61, the wire W is connected to the crane with the wire W slightly loosened to ensure safety. However, the present invention is not limited to this, and the hanging tool C and the wire W may be removed from the mounting flange cylinder 63. Further, in order to facilitate positional adjustment of the mounting flange cylinder 63, the position of the mounting flange cylinder 63 and the cylindrical member 61 may be adjusted with the mounting flange cylinder 63 slightly suspended by a crane.

Further, as shown in the enlarged view of FIG. 15, an annular groove 63a is formed in the lower surface of the mounting flange cylinder 63, and an annular packing S7 is press-fitted into the annular groove 63a. When the cylindrical member 61 and the mounting flange pipe 63 are fixed, the packing S7 is pressed between the cylindrical member 61 and the mounting flange pipe 63, so that the sealing between the cylindrical member 61 and the mounting flange pipe 63 is ensured. can. In this embodiment, the packing S7 is press-fitted into the annular groove 63a formed on the lower surface of the mounting flange cylinder 63, but the present invention is not limited to this. A packing S7 may be press-fitted into the annular groove.

Next, as shown in FIG. 16, a valve hanging fitting 64 to be connected to the butterfly valve 10 is temporarily installed on the mounting flange cylinder 63. Specifically, with the lid 65 of the mounting flange cylinder 63 connected above the valve hanging fitting 64, it is suspended by the hanging tool C and the wire W and lowered to above the mounting flange cylinder 63. The valve hanging fitting 64 includes a mounting surface portion 64a facing in a substantially horizontal direction, a cylindrical shaft portion 64c extending upward from a through hole 64b provided approximately at the center of the mounting surface portion 64a, and a space between the mounting surface portion 64a and the shaft portion 64c. A reinforcing rib 64d is provided over the area. Further, an adapter 66 is connected to the upper end of the shaft portion 64c.

Further, the lid body 65 has a through hole 65a formed in the center thereof that penetrates in the vertical direction, and an adapter 66 is inserted into the through hole 65a. In addition, the lid body 65 has a plurality of recesses 65b formed in the circumferential direction, which are recessed in the outer circumferential direction from the inner circumferential surface of the through hole 65a, and the recesses 65b are movable in the radial direction of the through hole 65a. A fixing jig 67 is provided. The fixing jig 67 protrudes in the inner diameter direction of the through hole 65a and engages with the lower surface of the annular protrusion 66a of the adapter 66, so that the valve hanging fitting 64 and the lid body 65 are integrated.

The weight of the valve hanging fitting 64 in this embodiment is approximately 2000 kg, the weight of the lid 65 is approximately 1900 kg, and the weight of the adapter 66 is approximately 270 kg. is approximately 4170 kg.

As shown in FIG. 17, with the lid 65 placed on the upper end of the mounting flange cylinder 63, the mounting flange cylinder 63 and the lid 65 are aligned and fixed with bolts and nuts (not shown). In this embodiment, even after the lid 65 is placed on the mounting flange cylinder 63, the wire W is connected to the crane with the wire W slightly loosened to ensure safety. The present invention is not limited to this, and the hanging tool C and wire W may be removed from the lid 65. Furthermore, in order to facilitate position adjustment of the lid 65, the positions of the mounting flange tube 63 and the lid 65 may be adjusted with the lid 65 slightly suspended by a crane.

As shown in the enlarged part of FIG. 17, since the packing S8 is pressed in the circumferential direction between the mounting flange cylinder 63 and the lid 65, the gap between the mounting flange cylinder 63 and the lid 65 is reduced. Sealing performance can be ensured. In this embodiment, the packing S8 is press-fitted into a groove provided on the lid body 65 side, but the present invention is not limited to this. A packing S8 may be press-fitted therein.

Next, the drive mechanism 8 as an insertion machine of the valve introducing machine 6 is connected to the valve hanging fitting 64. Note that since the drive mechanism 8 is the same as that used during the cutting operation of the fluid pipe 1, a description of the structure of the drive mechanism 8 will be omitted.

As shown in FIG. 18, when connecting the drive mechanism 8 to the valve hanging fitting 64, the shaft member 81 is advanced downward a predetermined length in advance so that the lower end of the shaft member 81 is lower than the case portion 86. A plurality of jacks 7 (spacers) are arranged in the circumferential direction of the upper flange 65c of the lid 65, the drive mechanism 8 is suspended by a crane, and the case part 86 is placed on the jacks 7. Next, an operator accesses through the gap between the case portion 86 formed by the jack 7 and the upper flange 65c of the lid body 65, and connects the shaft member 81 and the adapter 66 with bolts and nuts N2.

Next, as shown in FIG. 19, the drive mechanism 8, adapter 66, and valve hanging fitting 64 are lifted slightly upward by a crane, the jack 7 is removed from between the case part 86 and the lid 65, and the fixing jig 55 is removed. is retracted into the recess 53b. At this time, the valve hanging fitting 64 (approximately 2000 kg), the adapter 66 (approximately 270 kg), and the drive mechanism 8 (approximately 6060 kg) are lifted by the hanging tool C and the wire W, so the weight applied to the hanging tool C and the wire W is approximately 8330 kg. It becomes. At this time, a plurality of jacks 7 (spacers) are arranged in the circumferential direction of the lower flange 65d of the lid body 65, and the drive mechanism 8 is placed on the jacks 7 to receive the weight, and the drive mechanism 8 is placed on the crane. Weight may be reduced.

Next, although not particularly shown in the drawings, the drive mechanism 8 is suspended using a hanging tool C and a wire W so that the case part 86 is placed on the upper flange 65c of the lid body 65, and the case part 86 and the lid body are connected by bolts and nuts (not shown). 65 is fixed. Moreover, when the case part 86 and the lid body 65 are fixed, the packing S4 is pressed between the case part 86 and the upper flange 65c of the lid body 65, so that the sealing between the case part 86 and the lid body 65 is sealed. can ensure sex. In this embodiment, the packing S4 is disposed on the lower surface of the case portion 86, but the present invention is not limited to this. Packing S4 may be press-fitted.

In this embodiment, even after the case part 86 is placed on the lid body 65, it is connected to the crane with the wire W slightly loosened to the drive mechanism 8 to ensure safety. However, the suspension C and the wire W may be removed from the drive mechanism 8. Furthermore, in order to facilitate position adjustment of the drive mechanism 8, the position adjustment between the case portion 86 and the lid body 65 may be performed while the drive mechanism 8 is slightly suspended by a crane.

Next, as shown in FIG. 20, the valve hanging fitting 64 is lowered by the drive mechanism 8, and the mounting surface portion 64a of the valve hanging fitting 64 and the upper lid portion 14 of the butterfly valve 10 are connected with bolts and nuts (not shown). As a result, the cylindrical member 61, the mounting flange cylinder 63, the valve hanging fitting 64, the lid body 65, the adapter 66, and the drive mechanism 8 constitute the valve introduction device 6, and the casing 2, the working valve 4, and the valve introduction device 6 constitute the valve introduction device 6. The installation equipment is configured. At this time, the opening/closing shaft 12 of the butterfly valve 10 is inserted into the shaft portion 64c of the valve hanging fitting 64.

Thereafter, the valve hanging fitting 64 and the butterfly valve 10 are lifted slightly upward by the drive mechanism 8, and the locking member 62 is retracted and pulled out from the window 61a of the cylindrical member 61. Although not shown in the drawings, the window portion 61a is plugged to seal the window portion 61a. At this time, it goes without saying that the lower end of the butterfly valve 10 is adjusted so as not to come into contact with the valve body 42.

Next, a process of installing the butterfly valve 10 at a location where the fluid pipe 1 is cut by the valve introduction device 6 will be explained. As shown in FIG. 21, the valve body 42 of the working valve 4 is retracted to open the branch portion 2a, and the aforementioned gripping member 82 grips the outer peripheral surface of the rear end side of the shaft member 81. Then, the shaft member 81 and the butterfly valve 10 are moved toward the fluid tube 1 by sliding the advancing/retracting member 83 toward the fluid tube 1 .

The forward movement of the shaft member 81 and the butterfly valve 10 is performed in the range from the position where the grip member 82 grips the shaft member 81 to the position close to the regulating member 84, and after the progress movement is completed, the shaft member 81 and the butterfly valve 10 are , movement is restricted by the restriction member 84. Thereafter, another shaft member 81', 81' is connected to the upper end of the shaft member 81, and the above steps are repeated to arrange the butterfly valve 10 at the cut point of the fluid pipe 1. After the butterfly valve 10 is placed at the cut point of the fluid pipe 1, the butterfly valve 10 is fixed to the housing 2 by a predetermined fixing means. At this time, it is not necessarily necessary to connect another shaft member 81', and the arrangement may be completed using a shaft member 81 of a predetermined length in advance.

Note that when the butterfly valve 10 is fixed to the casing 2, the packing S5 of the partition wall 11 is pressed against both inner surfaces and the inner bottom surface of the casing 2, and the packing S6 of the upper lid part 14 is pressed against the inner bottom surface of the casing 2. Since the inner peripheral surface of the branch part 2a is in pressure contact, the fluid flowing through the fluid pipe 1 is prevented from going around between the partition wall 11 and the casing 2, and the fluid is prevented from leaking from the branch part 2a. Prevented.

Next, as shown in FIG. 22, the fluid in the cylindrical member 61 and the mounting flange cylinder 63 is discharged to the outside, and the fluid is accessed through the working hole 61b of the cylindrical member 61 to connect the mounting surface 64a of the valve hanging fitting 64 and the butterfly. The connection between the valve 10 and the upper lid part 14 by bolts and nuts is released. Then, the butterfly valve 10 is installed at the cut point of the fluid pipe 1 by retracting the shaft member 81 in the reverse order of the above steps and pulling up the valve hanging fitting 64 into the cylindrical member 61 and the mounting flange pipe 63. The work is completed.

Although not particularly shown, first, the drive mechanism 8 is removed from the lid 65, the lid 65 and the valve hanging fitting 64 are removed from the mounting flange cylinder 63, the mounting flange cylinder 63 is removed from the cylindrical member 61, and the cylindrical member 61 is removed. By removing the valve from the working valve 4, the removal work of the valve introduction device 6 is completed. In this way, since each member constituting the valve introduction device 6 can be transported separately by the crane, the load on the crane during the removal work of the valve introduction device 6 can be reduced. Thereafter, by removing the work valve 4 from the branch portion 2a of the housing 2, a series of operations from cutting a predetermined portion of the fluid pipe 1 to installing the butterfly valve 10 at the cut portion is completed.

In this way, by installing the partition wall 11, the opening/closing shaft 12, and the valve body 13 on the work valve 4, and attaching the upper cover part 14 to the partition wall 11, the opening/closing shaft 12, and the valve body 13 installed on the work valve 4, the butterfly It constitutes the valve 10. According to this, since the partition wall 11, the opening/closing shaft 12, and the valve body 13, which are the main body parts of the butterfly valve 10, and the upper lid part 14, which is the lid part, can be transported separately, the butterfly valve 10 is in an assembled state. Compared to the case where the butterfly valve 10 is installed on the cylindrical member 61 (approximately 9540 kg), the load on the crane can be distributed and reduced, so the crane can be made smaller and the work space where the butterfly valve 10 is installed can be saved. .

When a hole saw such as the cutter 52 is used as in this embodiment, a cylindrical member 52a having a diameter larger than that of the fluid pipe 1 is required, so the structure of the housing 2 is also enlarged, and accordingly, the butterfly valve 10, In particular, the upper lid part 14 for closing the branch part 2a becomes larger, but even in such a case, the partition wall 11, the opening/closing shaft 12, the valve body 13, and the upper lid part 14 are installed separately. Therefore, the load on the crane can be distributed and the crane can be suitably downsized.

Further, a cylindrical member 61 (approximately 3000 kg) capable of accommodating the butterfly valve 10 is installed in the working valve 4, and the partition wall 11, opening/closing shaft 12, and valve body 13 are installed in the cylindrical member 61. Since the upper lid part 14 is attached to the installed partition wall 11, opening/closing shaft 12, and valve body 13, the butterfly valve 10 can be accurately positioned and installed using the cylindrical member 61 installed on the working valve 4.

Further, a locking member 62 can be attached to the cylindrical member 61, and the upper lid portion 14 can be accurately moved in a stable state in which the partition wall 11, the opening/closing shaft 12, and the valve body 13 are locked to the locking member 62. Can be installed.

In addition, in order to connect the drive mechanism 8 and the valve hanging fitting 64 (insertion machine) to the butterfly valve 10 with the butterfly valve 10 held by the locking member 62, the butterfly valve 10 is held in a stable state. The drive mechanism 8 and the valve hanging fitting 64 can be attached to the valve 10 with high precision, and the butterfly valve 10 can be installed at a desired position within the housing 2 by using the driving mechanism 8 and the valve hanging fitting 64.

Furthermore, after configuring the butterfly valve 10, the drive mechanism 8 and the valve hanging fitting 64 are connected to configure the valve introduction device 6, so the butterfly valve 10, the driving mechanism 8, and the valve hanging fitting 64 are assembled integrally. The load on the crane can be reduced compared to installing it on the work valve 4 in that state.

Further, a jack 7 as a spacer is disposed between the drive mechanism 8 and the valve hanging fitting 64 and the butterfly valve 10, specifically between the case portion 86 of the drive mechanism 8 and the lid body 65, and the jack 7 is placed on the jack 7. The mounting surface portion 64a of the valve hanging fitting 64 connected to the drive mechanism 8 placed thereon is connected to the upper lid portion 14 of the butterfly valve 10. According to this, since the drive mechanism 8 and the valve hanging fitting 64 can be connected to the butterfly valve 10 in a state where their loads are placed on the jack 7, not only the connection work becomes easy but also the load on the crane can be reduced.

As explained above, the work valve 4, the cutting machine 5, and the butterfly valve 10 are composed of a plurality of divided bodies, and after the casing 2 is attached to the fluid pipe 1 in a sealed manner, the divided bodies are attached to the casing. It is designed to be assembled in stages 2. Specifically, in the case of the working valve 4, it is divided into a valve box 41, a valve body 42, a valve cover 43, and a valve stem 44, and the working valve 4 is constructed by sequentially assembling these in the housing 2. are doing. In addition, in the case of the cutting machine 5, it is divided into a mounting flange tube 51, a cutter 52 and a lid body 53, and a drive mechanism 8, and by sequentially assembling these to the work valve 4 connected to the housing 2. It constitutes a cutting machine 5. In addition, in the case of the butterfly valve 10, it is divided into a partition wall 11, an opening/closing shaft 12, a valve body 13, and an upper lid part 14, and by sequentially assembling these to the working valve 4 connected to the housing 2, the butterfly valve It constitutes the valve 10. According to this, the plurality of divided bodies constituting the working valve 4, the cutting machine 5, and the butterfly valve 10 can be transported separately by the crane, so that the load on the crane can be reduced and the crane can be made smaller.

Further, a first divided body among the plurality of divided bodies is locked to a locking part provided on the housing 2, and the remaining second divided body is locked to the first divided body that is locked to the locking part. It is designed to assemble the divided bodies of. Specifically, in the case of the working valve 4, the valve box 41, which is the first divided body, is placed (locked) on the branch part 2a (locking part) of the housing 2, and the second valve box 41 is placed on the branch part 2a (locking part) of the housing 2. The valve body 42 and valve cover 43, which are divided bodies, are assembled. In the case of the cutting machine 5, a fixing jig 55 (locking part) is provided on the lid body 53 of the mounting flange cylinder 51 that connects the cutter 52, which is the first divided body, to the housing 2 via the work valve 4. The drive mechanism 8, which is the second divided body, is assembled to the cutter 52. In the case of the butterfly valve 10, the partition wall 11, which is the first divided body, is locked to a locking member 62 (locking portion) provided on a cylindrical member 61 connected to the housing 2 via the working valve 4. Then, the upper lid part 14, which is the second divided body, is assembled to the partition wall 11. According to this, the first divided body (valve box 41, cutter 52, partition wall 11) among the plurality of divided bodies is connected to the locking portion of the housing 2 (branch portion 2a, fixing jig 55, locking member 62). In the stable state in which the first divided body is locked, the remaining second divided body (valve body 42 and valve lid 43, drive mechanism 8, and upper lid portion 14) can be attached with high precision to the first divided body.

Further, the cutting machine 5 includes a cutter 52 and a drive mechanism 8 as the plurality of divided bodies, and the drive mechanism 8 is connected to the butterfly valve 10 so that it can be inserted into the housing 2. That is, since the cutter 52 and the drive mechanism 8 constituting the cutting machine 5 are separated, the drive mechanism 8 for driving the cutter 52 can be used as an insertion tool for the butterfly valve 10. In other words, the drive mechanism 8 can be used both to drive the cutter 52 and move it forward and backward, and to insert the butterfly valve 10, so the structure can be simplified.

In this embodiment, the working valve 4, the cutting machine 5, and the butterfly valve 10 are each composed of a plurality of divided bodies, but the present invention is not limited to this. At least one of the cutting machine 5 and the butterfly valve 10 may be composed of a plurality of divided bodies. It goes without saying that all windows, working holes, etc. should be sealed with lids when cutting or introducing valves in a non-flow condition.

Next, the working valve of Modification 1 will be explained based on FIG. 23. Note that explanations of the same and overlapping configurations as those of the previous embodiment will be omitted.

As shown in FIG. 23, the working valve 400 in the first modification includes a substantially cylindrical valve box 401 penetrating in the vertical direction and disposed on both sides of the fluid pipe 1 in the valve box 401 in the pipe axis direction. It is composed of valve bodies 402A, 402B, valve covers 403A, 403B that accommodate the valve bodies 402A, 402B, and valve stems 404A, 404B that move the valve bodies 402A, 402B relative to the valve covers 403A, 403B.

The valve box 401 is provided with openings 401a and 401b that face each other in the axial direction of the fluid pipe 1, and a slide groove 401c is formed so as to communicate the openings 401a and 401b. The working valve 400 is constructed by sealingly fixing the valve covers 403A, 403B to the valve box 401 with the valve bodies 402A, 402B inserted into the openings 401a, 401b, respectively. By advancing the valve bodies 402A, 402B from both sides of the valve box 401, the tips of the valve bodies 402A, 402B come into contact with each other, and the branch portion 2a of the housing 2 can be closed.

In this way, the valve bodies 402A, 402B, valve covers 403A, 403B, and valve stems 404A, 404B are divided into structures, and by installing these separately in order, the load on the crane used when installing the work valve 400 is reduced. can. Further, the valve box 401 is provided with openings 401a, 401b on opposite sides, and the valve bodies 402A, 402B, valve covers 403A, 403B, and valve stems 404A, 404B are attached to the openings 401a, 401b. , it is possible to stabilize the weight balance of the working valve 400, and it is possible to suppress an uneven load from being applied to the connection portion between the working valve 400 and the housing 2.

Next, a working valve of modification 2 will be explained based on FIG. 24. As shown in FIG. 24, the working valve 410 includes a first divided body 412 in which a half member 411A (valve box divided body), a valve body 402A, a valve cover 403A, and a valve stem 404A are unitized; A second divided body 413 in which a member 411B (valve box divided body), a valve body 402B, a valve cover 403B, and a valve stem 404B are unitized, and the first divided body 412 and the second divided body 413 are housed in a housing. It may be constructed by assembling on the branch part 2a of the body 2. Note that the working valve 410 may be configured by assembling each member in the branch portion 2a of the housing 2. In this case, since the valve box is constituted by the plurality of half members 411A and 411B, the load on the crane can be reduced.

Further, in the embodiment, the cutter 52 is a hole saw made up of a cylindrical member 52a and a center drill 52b, but the cutter 52 is not limited to this and can be freely modified. For example, as shown in FIG. 25, a cutting machine 500 according to modification 3 includes a cutter mechanism 501 that is externally fitted at a predetermined location of the fluid pipe 1 within the housing 20, and a work case that is attached above the work valve 402. 502, and a drive mechanism 800 that drives the cutter mechanism 501 and can be pulled up into the work case 502.

The cutter mechanism 501 includes two sprockets 501a, 501a that are rotatably provided in the outer circumferential direction of the fluid pipe 1, and a drive transmission section 501b that transmits driving force to the sprockets 501a, 501a. A cutting tool (not shown) for cutting the fluid pipe 1 is attached. Further, the drive mechanism 800 includes a rod 801 connected to the drive transmission section 501b, a motor 802 that rotationally drives the rod 801, and a pulling mechanism 803 that can pull up the rod 801.

By driving the motor 802, the sprockets 501a, 501a rotate via the rod 801 and the drive transmission section 501b, and the fluid pipe 1 can be cut. Further, the cutter mechanism 501 can be pulled up into the work case 502 by the pulling mechanism 803 while the sprockets 501a, 501a hold the section of the fluid pipe 1.

Additionally, there are the following modifications of the cutting machine. As shown in FIG. 26, the cutting machine 510 in the fourth modification includes a cylindrical body 511 fixed above the branch part 200a of the housing 200 via the work valve 403, and a cylindrical body 511 connected to the upper part of the cylindrical body 511. a movable plate 513 provided so as to be movable relative to the base plate 512, a driving means 514 that applies driving force to the movable plate 513, an end mill 515 connected to the upper part of the movable plate 513, and an end mill. A drive mechanism 516 that rotates the housing 200 and a rotation mechanism 523 that rotates the housing 200 in the circumferential direction are provided.

A slit 512a is formed in the center of the base plate 512, and rails 517, 517 extending along the axial direction of the fluid tube 1 are arranged in parallel on the upper surface of the base plate 512 with the slit 512a in between. ing. Note that a packing is fixed around the slit 512a.

The movable plate 513 has a slit 513a and recesses 518, 518 fitted into the rails 517, 517, and is capable of sliding movement on the rails 517, 517. Further, the movable plate 513 is formed such that a structural portion 520 having a screw hole 519 protrudes upward. The movable plate 513 is configured to slide while being in sealing contact with the packing in the slit 512a of the base plate 512.

The driving means 514 includes two upright pieces 521, 521 spaced apart in the tube axis direction on the upper surface of the base plate 512, and a threaded rod that is rotatably but immovably attached in the axial direction between the upright pieces 521, 521. 522, and the threaded rod 522 is screwed into a threaded hole 519 of a structural portion 520 in the movable plate 513. That is, as the threaded rod 522 rotates around the axis, the movable plate 513 slides in the axial direction of the fluid tube 1. A handle 522a is attached to one end of the threaded rod 522, and the threaded rod 522 can be rotated by grasping the handle 522a.

According to this, the fluid pipe 1 can be bored by moving the end mill 515 while being rotated by the drive mechanism 516, and in this state, by sliding the movable plate 513 in the axial direction of the fluid pipe 1, the fluid pipe 1 can be bored. A first cutting portion (not shown) extending in the tube axis direction can be formed in the tube 1 . After forming the first cutting section, the end mill 515 is positioned at the axial center of the first cutting section, and the rotation mechanism 523 rotates the housing 200 to form a first cutting section extending along the circumferential direction of the fluid pipe 1. Two cutting parts can be formed.

That is, the butterfly valve 10 is installed in the fluid pipe 1 with the valve body 13 open by inserting the valve body 13 into the first cutting part and passing the partition wall 11 through the second cutting part. Therefore, the influence of the fluid flowing through the fluid pipe 1 can be suppressed. As described above, the method is not limited to cutting the fluid pipe 1 as long as it is possible to form an opening into which a fluid control device such as the butterfly valve 10 can be inserted.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and any changes or additions that do not depart from the gist of the present invention are included in the present invention. It will be done.

For example, in the embodiment described above, the butterfly valve 10 is used as the fluid control, but the present invention is not limited thereto. For example, the fluid control may be a gate valve, a plug, a switching valve, or the like. For example, in the embodiment described above, the butterfly valve 10 is constructed from a plurality of divided bodies, but the present invention is not limited to this, and the fluid control may be constructed integrally.

1 Fluid pipe 2 Housing 2a Branch part (opening part)
2b Flange (locking part)
4 Work valve 5 Cutting machine 6 Valve introducing machine 7 Jack (spacer)
8 Drive mechanism (drive unit, insertion machine, second divided body)
10 Butterfly valve (fluid control)
11 Partition wall (main body, first divided body)
12 Opening/closing shaft (main body, first divided body)
13 Valve body (main body, first divided body)
14 Upper lid part (lid body part, second divided body)
20 Housing 41 Valve box (first divided body)
41c Valve seat portion 42 Valve body (second divided body)
43 Valve lid (second divided body)
44 Valve stem (second divided body)
51 Mounting flange tube (cylindrical body)
52 Cutter (first divided body)
53 Lid body (first divided body)
54 Adapter (first split body)
55 Fixing jig (locking part)
61 Cylindrical member (cylindrical body)
62 Locking member (locking part)
63 Mounting flange tube (cylindrical body)
64 Valve hanging fitting 65 Lid body 66 Adapter 81, 81' Shaft member (drive shaft)
86 Case part (case)
200 Housing 200a Branch (opening)
400 Working valve 401 Valve box (first divided body)
402 Work valve 402A, 402B Valve body (second divided body)
403 Work valve 403A, 403B Valve lid (second divided body)
404A, 404B Valve stem (second split body)
410 Work valves 411A, 411B Half member 412 First divided body 413 Second divided body 500 Cutting machine 510 Cutting machine

Claims (4)

a housing that is attached to the fluid pipe in a sealed manner; a work valve that is attached to the opening of the housing and is capable of opening and closing the inside of the housing; A fluid control installation device for installing a fluid control for controlling the flow path of the fluid pipe in the housing in an uninterrupted state, comprising a cutter for cutting the fluid, and a cutting machine having a drive unit for driving the cutter. An assembly method,
At least either the cutting machine or the fluid control device is composed of a plurality of divided bodies, and includes support means for supporting the weight of the periphery of the casing when the casing is attached to the fluid pipe in a sealed manner. 1. A method for assembling a fluid control installation device, characterized in that the divided body is sequentially assembled to the housing after the housing is attached to the fluid pipe in a sealed manner. 2. The method of assembling a fluid control installation device according to claim 1, wherein both the cutting machine and the fluid control device are composed of the plurality of divided bodies. 3. The method of assembling a fluid control installation device according to claim 1, wherein the support means is a concrete foundation formed below the casing. The cutting machine is comprised of the cutter and the drive section as the plurality of divided bodies, and the drive section is connected so that the fluid control can be inserted into the housing. 4. A method for assembling a fluid control installation device according to any one of 1 to 3.

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