Installation method and installation device for fluid control device

Abstract

To provide an installation method of a fluid control device capable of improving positional accuracy of a valve element inserted into a hole part formed in a fluid pipe in a casing, enhancing controllability of fluid in the pipe, and reducing the size, weight and cost of construction equipment such as an installation device of a flow control valve and a working valve device.SOLUTION: A method of installing a fluid control device including at least a housing 5 in which a fluid pipe 1 is installed in a sealed state, and a flow control valve 10 including a valve body 11 and a valve housing 12 capable of sealing an inner surface of a hole portion 1b of the fluid pipe 1 formed in the housing 5 and an inner circumferential surface of the fluid pipe 1, in an uninterrupted flow state, the method comprising: A movement preventing means 90 for preventing the movement of a casing 5 is installed in a fluid pipe 1, a hole part 1b is formed by a boring means for boring the fluid pipe 1, the inside of the casing 5 is closed by an operation valve device 3 capable of opening and closing the inside of the casing 5, a flow control valve 10 and its inserting machine 60 are installed outside the casing 5, and the flow control valve 10 is installed by the operation valve device 3 so that the valve element 11 can be inserted into the hole part 1b and the fluid pipe 1.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present invention relates to an installation method and installation device for installing a fluid control device in an uninterrupted flow state, the fluid control device having at least a housing that is installed in a sealed state in a fluid pipe and a flow control valve that controls the fluid in the pipe by inserting a valve body into a hole in the fluid pipe formed inside the housing. [Background technology]

[0002] Conventional fluid control device installation methods and installation devices involve sealingly fitting a split-structure housing (split T-pipe) onto an existing fluid pipe, connecting an operating valve device (operating gate valve) to the open end of the upper end of the neck that constitutes this housing, inserting a flow control valve (valve case, gate valve body) into the operating valve device that has blocked the inside of the housing using a flow control valve installation device (work case, operating rod, jack mechanism) and connecting it to the housing, and inserting the valve body of this flow control valve into the pipe through a hole in the fluid pipe, using the inner surface of the fluid pipe as a valve seat to control the fluid in the pipe (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-38584 A (page 18, Figure 33) Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, a working valve device is connected to the open end of the neck of a split T-shaped pipe that constitutes a housing fitted over a fluid pipe, and a flow control valve installation device is connected to the open end of the neck of the housing, superimposed on the upper end of the working valve device. This flow control valve is hermetically connected to the open end of the upper end of the neck of the housing. As a result, the extension stroke of the flow control valve installation device is long, which causes the valve element to be misaligned and makes it difficult to insert it into the designed position, resulting in problems such as an inability to maintain high controllability of the fluid in the pipe. Furthermore, the long extension stroke requires larger installation equipment, such as the flow control valve installation device and working valve device, which not only increases the equipment and installation costs but also causes excessive load on the existing fluid pipe.

[0005] The present invention has been made with an eye on these problems, and aims to provide an installation method and installation device for a fluid control device that improves the positional accuracy of the valve body inserted into a hole formed in a fluid pipe within a housing, thereby increasing the controllability of the fluid in the pipe, and that enables the size, weight, and cost of construction equipment such as flow control valve installation devices and work valve devices to be reduced. [Means for solving the problem]

[0006] In order to solve the above problems, the installation method of the fluid control device of the present invention includes the steps of: 1. An installation method for installing, in an uninterrupted flow state, a fluid control device having at least a housing that is installed in a fluid pipe in a sealed state, and a flow control valve that includes a valve body and a valve housing that can be inserted into a hole portion of the fluid pipe formed in the housing, an operating valve device having an operating valve body that partitions the inside of the housing in an openable and closable manner is attached to an opening formed in the neck portion of the housing; opening the working valve body while sealingly surrounding the open end formed on the neck portion; With the inside of the open end and the outside that sealably surrounds the open end at the same pressure, the flow control valve, which is in sealed communication with the inside of the housing, is inserted from the open end to an installation position where the tip of the valve housing of the flow control valve exceeds the opening of the neck, thereby sealing the area between the circumferential surface of the valve housing and the circumferential surface of the neck at the installation position with an annular sealing member. According to this feature, when the inside of the open end and the outside that sealably surrounds the open end are at the same pressure, the tip of the valve housing of the control valve can be sealed by the annular sealing member at an installation position beyond the opening in the neck, so that the opening and the open end can be blocked simultaneously in this sealed state. Therefore, even if the fluid pipe has a relatively large diameter, the pressing force required to install the control valve can be reduced, allowing it to be installed accurately in the desired position, and the fulcrum when the valve body of the control valve is inserted into the hole of the fluid pipe is reliable, improving the positional accuracy of the valve body and increasing the controllability of the fluid in the pipe. In addition, the lightweight and compact working valve device can be easily attached and detached without the need to operate the valve body.

[0007] The working valve body allows the interiors of the housings partitioned by the working valve body to communicate with each other, and also discharges air from within the housings to the outside. According to this feature, when the interior of the housing partitioned by the working valve body is brought into communication, the air inside the housing can be discharged, and therefore the interior of the housing can be filled with the fluid inside the pipe.

[0008] The housing has a divided structure that hermetically fits the fluid pipe, and the hole of the fluid pipe is formed by drilling with a drilling machine. According to this feature, a hole can be formed in an existing fluid pipe by drilling without interrupting the flow, and the valve body can be inserted. In particular, by providing an opening in the neck of the housing for attaching and detaching the working valve device, the attachment position of the working valve device can be brought close to the fluid pipe, which shortens the drilling stroke and minimizes positional deviation of the drilling. At the same time, construction equipment such as the drilling machine and the working valve device can be made smaller, lighter, and more cost-effective.

[0009] The present invention is characterized in that a movement prevention means for preventing the movement of the housing is installed in the fluid pipe. According to this feature, even if the pressure of the fluid in the pipe acts on the housing by closing the flow control valve, the movement prevention means can prevent the housing from moving, thereby maintaining high controllability of the fluid. Furthermore, by installing the movement prevention means when drilling, it is possible to suppress misalignment of the hole.

[0010] The working valve is opened in a state where the interiors of the housings partitioned by the working valve are in communication with each other and at the same pressure. According to this feature, with the interiors of the housings separated by the working valve body in communication with each other and at the same pressure, the tip of the valve housing of the flow control valve can be sealed by the annular sealing member at an installation position beyond the opening in the neck, so that the opening and the open end can be blocked simultaneously in this sealed state. Therefore, the pressing force required to install the flow control valve can be reduced, and it can be installed accurately in the desired position.

[0011] The neck portion is characterized in that a communication opening is provided to allow the interiors of the housing partitioned by the working valve body to communicate with each other. According to this feature, by using the neck portion, there is a high degree of freedom in designing the location where the communication opening is formed, and it is easy to perform the work of connecting the inside of the housing separated by the operating valve body.

[0012] The working valve device is characterized in that a communication opening is provided in the working valve housing of the working valve device to allow the interiors of the housings partitioned by the working valve body to communicate with each other. According to this feature, the communication opening is provided in the working valve housing close to the working valve element that separates the interior of the housing, so that the communication passage can be made short.

[0013] A holding member for holding the fluid control valve, which is installed in the housing, is attached in a sealed manner to the opening of the neck portion. According to this feature, not only can a retaining member that holds the fluid control valve installed in the housing be easily attached using the opening that communicates with the inside of the neck, but this retaining member can also seal the opening.

[0014] The installation device for a fluid control device of the present invention comprises: An installation device for installing a fluid control device in an uninterrupted flow state, the installation device having at least a housing that is installed in a sealed state in a fluid pipe, and a flow control valve that includes a valve body and a valve housing that can be inserted into a hole portion of the fluid pipe formed in the housing, a working valve device attached to an opening formed in a neck portion of the housing and including a working valve body that partitions the inside of the housing in an openable and closeable manner; opening the working valve body while sealingly surrounding the open end formed on the neck portion; The flow control valve, which is in communication with the interior of the housing in a sealed state, is inserted from the open end to an installation position where the tip of the valve housing of the flow control valve exceeds the opening of the neck portion, with the inside of the open end and the outside side sealably surrounding the open end at the same pressure, and is characterized by having an annular sealing member that seals the gap between the circumferential surface of the valve housing and the circumferential surface of the neck portion at the installation position. According to this feature, when the inside of the open end and the outside that sealably surrounds the open end are at the same pressure, the tip of the valve housing of the control valve can be sealed by the annular sealing member at an installation position beyond the opening in the neck, so that the opening and the open end can be blocked simultaneously in this sealed state. Therefore, even if the fluid pipe has a relatively large diameter, the pressing force required to install the control valve can be reduced, allowing it to be installed accurately in the desired position, and the fulcrum when the valve body of the control valve is inserted into the hole of the fluid pipe is reliable, improving the positional accuracy of the valve body and increasing the controllability of the fluid in the pipe. In addition, the lightweight and compact working valve device can be easily attached and detached without the need to operate the valve body.

[0015] A movement prevention means for preventing the movement of the housing is provided on the fluid pipe. According to this feature, even if the pressure of the fluid in the pipe acts on the housing by closing the flow control valve, the movement prevention means can prevent the housing from moving, thereby maintaining high controllability of the fluid. Furthermore, by installing the movement prevention means when drilling, it is possible to suppress misalignment of the hole. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a housing constituting a fluid control device in a first embodiment. [Figure 2] 1(a) is a partially sectional front view showing a housing fitted with a fluid pipe, and FIG. 1(b) is a sectional side view of the same. [Figure 3] FIG. 3 is a plan view of the housing, similar to FIG. 2. [Figure 4] FIG. 2 is a partial cross-sectional front view showing the working valve device assembled to the housing. [Figure 5] FIG. 10 is a partially cross-sectional perspective view showing a state in which a fluid pipe is being drilled by a drilling machine. [Figure 6] FIG. 10 is a partially sectional perspective view showing a state in which chips are being discharged by a discharger. [Figure 7] FIG. 10 is a partially cross-sectional perspective view showing a state in which the interior of a housing partitioned by an operating valve body is in communication with one another. [Figure 8] 1(a) is a partially sectional front view showing the state in which a flow control valve is being inserted by an insertion machine, and FIG. 1(b) is a sectional view taken along the line AA in FIG. 1(a). [Figure 9] 1(a) is a cross-sectional view of the sealing member in Example 1, (b) is a cross-sectional view showing Modified Example 1 of the sealing member, and (c) is a cross-sectional view showing Modified Example 2 of the sealing member. [Figure 10] FIG. 10 is a partially cross-sectional perspective view showing the state in which the installation of the flow control valve has been completed by the insertion machine. [Figure 11] 11 is a partial cross-sectional front view similar to FIG. [Figure 12] 8(a) to 8(c) are enlarged cross-sectional views of the area enclosed by the dotted line in FIG. 8(a), showing the procedure for removing the insertion machine from the flow control valve. [Figure 13] FIG. 10 is a partially cross-sectional perspective view showing a state in which a blocking ring or the like is attached to a housing in which a flow control valve is installed. [Figure 14] FIG. 2 is a partial cross-sectional front view showing a flow restriction valve fixed to a housing. [Figure 15] As in Figure 14, this is a partial cross-sectional side view. [Figure 16] 1(a) is a partially sectional front view showing a modified example of a closing cover for an opening of a housing, and FIG. 1(b) is a BB cross-sectional view of FIG. [Figure 17] 10A and 10B are diagrams showing a movement prevention means for preventing movement of the housing in the second embodiment, in which (a) is a front view of the movement prevention means and (b) is a side view of the same. [Figure 18] 18 is a plan view of the movement prevention means, similar to FIG. 17. FIG. [Figure 19] 10A and 10B are diagrams showing a first modified example of the movement prevention means, in which (a) is a front view of the movement prevention means and (b) is a side view of the same. [Figure 20] FIG. 20 is a plan view of the movement prevention means, similar to FIG. 19. [Figure 21] FIG. 10 is a front view showing a second modification of the movement prevention means. [Figure 22] FIG. 10 is a partially enlarged cross-sectional view showing a third modified example of the movement prevention means. [Figure 23] FIG. 10 is a partially enlarged cross-sectional view showing a fourth modified example of the movement prevention means. DETAILED DESCRIPTION OF THE INVENTION

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below of an embodiment of a method and an apparatus for installing a fluid control device according to the present invention. [Example]

[0018] An installation method and installation device for a fluid control device according to a first embodiment will be described with reference to FIGS. 1 to 9(a) and 10 to 15. As shown in FIGS. 14 and 15, the fluid control device according to the present invention is mainly composed of a housing 5 that fits around a fluid pipe 1 and a flow control valve 10 that is installed in the housing 5 and controls the fluid in the pipe. In this embodiment, the fluid control device and its installation method will be described, which includes drilling a hole in the housing 5 at a predetermined location in an existing fluid pipe 1, which is a pipeline component, under an uninterrupted flow condition, and then installing the flow control valve 10 in the housing 5. Note that the fluid in the fluid pipe 1 is tap water in this embodiment, but it may be, for example, industrial water, agricultural water, sewage, or a liquid other than water, or it may be a gas or a gas-liquid mixture of gas and liquid.

[0019] The fluid pipe 1 of this embodiment is a ductile cast iron pipe with a relatively large diameter (e.g., a diameter of 300 mm or more), and is formed as a straight pipe with a generally circular cross section, as shown in Figures 1 and 2. In this embodiment, the fluid pipe 1 is disposed in a generally horizontal direction. The fluid pipe according to the present invention may also be made of other metals, such as cast iron or steel, or concrete, polyvinyl chloride, polyethylene, or polyolefin. Furthermore, the inner surface of the fluid pipe may be coated with an epoxy resin layer, mortar, plating, or the like, or may be coated with an appropriate material by powder coating.

[0020] The fluid pipe of the present invention is not limited to a straight pipe as in the present embodiment, but may be, for example, a non-standard shaped pipe. The non-standard shaped pipe is a general term for pipes having at least a portion thereof various non-standard shaped portions, such as a curved pipe portion, a branched portion, a cross portion, a non-standard diameter portion, a joint ring portion, a short pipe portion, a drain portion, etc.

[0021] First, as shown in FIGS. 1 and 2 , the outer surface of the fluid pipe 1, which will be the mounting location of the fluid control device according to the present invention, is cleaned, and then a housing 5 constituting the fluid control device is hermetically fitted onto the fluid pipe 1 via a sealing member 4 for sealing the perforated portion of the fluid pipe 1 (described later). The housing 5 has a divided structure consisting of multiple segments, and in this embodiment, it is primarily composed of a first segment 51 constituting the upper side and a second segment 52 constituting the lower side. Note that the divided structure of the housing 5 is not limited to this embodiment, and may be divided horizontally, or may be divided into a predetermined number of segments, such as three or more. In this embodiment, the divided housings are hermetically joined together using fastening members 2 consisting of bolts and nuts, but this is not limited thereto and may also be joined by welding, for example.

[0022] As shown in Figures 1 to 3, the first division 51 of the housing 5 is composed of a conduit housing portion 5a extending in the conduit direction along the fluid pipe 1, and a cylindrical neck portion 5d branching off and extending in the vertical direction approximately at the center of the conduit housing portion 5a, having an open end portion 5c opening upward and an opening portion 5b opening to the side, and is formed in an inverted T shape when viewed from the front.

[0023] Furthermore, the open end 5c of the neck 5d has a pair of flange portions 5e that protrude radially outward toward the pipeline direction of the fluid pipe 1, and a plurality of push bolts 5f, 5f that are configured to be insertable into a plurality of through holes formed along the circumferential direction of this flange portion 5e.

[0024] The neck 5d has a thickened pipe portion 5g on its cylindrical circumferential side whose outer surface protrudes in the radial direction, and the thickened pipe portion 5g has an opening 5b that opens toward one side in the pipe direction of the fluid pipe 1. As shown in Fig. 1, the opening 5b opens in a horizontally elongated, approximately rectangular shape in side view, and is formed so that an operating valve body 31 of the operating valve device 3 can be inserted therethrough, as will be described later.

[0025] As shown in Figures 1 and 2, the first partition 51 of the housing 5 has a rib 5s extending in the vertical direction between approximately the center of the opening 5b in a side view and the upper flange portion 5e, and a rib 5t extending in the vertical direction between approximately the center of the opening 5b in a side view and the lower pipeline housing portion 5a.

[0026] As shown in FIG. 2(a), the inner peripheral portion of the neck portion 5d includes an inner peripheral surface 5h formed into a curved surface that is approximately circular in plan view, a recessed portion 5i recessed in the outer diameter direction at the same height as the opening 5b, an inner peripheral surface 5j formed below the recessed portion 5i and formed with a slightly smaller diameter than the upper inner peripheral surface 5h, and a step portion 5k connected to the lower end of the inner peripheral surface 5j and protruding in the inner diameter direction.

[0027] As shown in Figures 2(a) and (b), a communication opening 17 is formed at the bottom of the neck 5d, penetrating the neck 5d from the inside to the outside, and an open / close plug 18 is normally screwed into this communication opening 17.

[0028] Next, as shown in Figures 4 and 5, the working valve device 3 is hermetically connected to the opening 5b of the neck portion 5d. The working valve device 3 is mainly composed of an working valve body 31 that slides open and close within the housing 5, and a housing member 32 serving as a working valve housing having a housing interior 32a that houses the working valve body 31 so that it can slide horizontally, and an open portion 32b whose one side end is open.

[0029] The housing member 32 is provided with a shaft member 34 that is rotatable, pivotally supported so as not to be able to move forward or backward, and extends horizontally, and the working valve body 31 is threadedly engaged with this shaft member 34, and by rotating an operating member 35 attached to a tip end 34a of the shaft member 34 that protrudes outward from the housing member 32, the working valve body 31 can slide relative to the housing member 32. In addition, on the upper and lower surfaces of the housing member 32, ribs 32d formed in a lattice pattern are provided extending in the vertical direction.

[0030] Additionally, an endless seal member 31a is provided along the edges of the upper and lower surfaces of the working valve body 31, and the inside of the housing 5 can be sealed off by this seal member 31a.

[0031] Regarding the detailed procedure for attaching the working valve device 3, first, the containing member 32 is placed on the outer surface of the neck 5d at a position where the open portion 32b thereof communicates with the opening 5b of the neck 5d.

[0032] Next, the accommodating member 32 is fastened to the neck portion 5d. In this embodiment, fastening is performed by threading mounting bolts 37 through a plurality of through holes formed to surround the open portion 32b of the accommodating member 32 and a plurality of female threaded holes formed to surround the opening portion 5b of the neck portion 5d. That is, in this embodiment, the mounting bolts 37 constitute the fastening member. In this way, since the accommodating member 32 is connected to the neck 5d by the mounting bolts 37 constituting the fastening member, the accommodating member 32 is positioned in a position where the open portion 32b and the opening portion 5b of the neck 5d are in communication, and the fastening operation can be easily performed. Note that bolts and nuts may also be used as the fastening members.

[0033] Furthermore, a seal member 39 is disposed in the housing member 32 so as to surround the periphery of the open portion 32b, and by fastening the fastening members described above, this seal member 39 comes into close contact with the periphery of the opening 5b, thereby sealing the opening 5b and the open portion 32b. By installing the working valve device 3 in the opening 5b provided in the neck portion 5d in this manner, the mounting positions of the drilling machine 7 and the insertion machine 60, which will be described later, can be brought as close as possible to the fluid pipe 1, and the extension stroke by which the drilling machine 7 and the insertion machine 60 approach the fluid pipe 1 can be shortened, resulting in the drilling machine 7 and the insertion machine 60 being made smaller, lighter, and more cost-effective (see FIGS. 5 and 7).

[0034] Next, as shown in FIG. 5 , a drilling machine 7 is hermetically connected to the open end 5c of the neck 5d. The drilling machine 7 is primarily composed of a mounting flange tube 71, a cutter 72 for drilling holes in the fluid pipe 1, a drive motor 74 for rotating the cutter 72 within the mounting flange tube 71, and an advance / retract mechanism 73 for vertically advancing and retracting the cutter 72. The cutter 72 is formed in a cylindrical shape with a bottom and a diameter smaller than the fluid pipe 1. The cutter 72 is composed of a hole saw 72a with a cutting blade along the circumferential direction at its tip, and a center drill 72b arranged coaxially with the rotation axis of the hole saw 72a and protruding beyond the cutting blade. The cutter 72 is arranged concentrically with the open end 5c of the neck 5d of the housing 5. It is inserted into the neck 5d of the housing 5 from the open end 5c side and can advance to a position where it penetrates at least the pipe wall at the top of the fluid pipe 1.

[0035] The procedure for mounting the drilling machine 7 will be described below. The flange portion 75 formed at the tip of the mounting flange tube 71 is fastened to the flange portion 5e at the open end 5c of the neck portion 5d by a plurality of fastening members 77 in the circumferential direction.

[0036] In addition, a sealing member is provided between the upper end surface of the flange portion 5e of the neck portion 5d and the lower end surface of the flange portion 75 of the mounting flange tube 71, and this sealing member is in tight contact with the flange portion 75 of the mounting flange tube 71, so that in this fastened state the mounting flange tube 71 of the drilling machine 7 and the neck portion 5d of the housing 5 are sealed.

[0037] In addition, the operation of connecting the work valve device 3 to the opening 5b of the neck 5d and the operation of connecting the drilling machine 7 to the open end 5c of the neck 5d are not necessarily limited to the order described above, and the operation of connecting the work valve device 3 may be performed after the operation of connecting the drilling machine 7, or these connection operations may be performed simultaneously in parallel.

[0038] Next, as shown in Figure 5, the drilling process of the fluid pipe 1 using the drilling machine 7 will be explained. First, the working valve body 31 of the working valve device 3 is placed inside the housing interior 32a of the housing member 32, and the inside of the housing 5 is opened. Then, the cutter 72 is rotated by the drive motor 74 of the drilling machine 7, and the cutter 72 is advanced downward by the advance / retract mechanism 73, so that the wall at the top of the fluid pipe 1 is drilled without interrupting the flow.

[0039] At this time, chips generated during drilling are discharged to the outside together with the fluid by opening a ball valve (not shown) attached to a communication opening 17 formed on the side of the neck 5d as an opening communicating with the inside of the housing 5. As will be described later, this communication opening 17 is used as a bypass for filling with water when the flow control valve 10 is operated. After drilling, the above-mentioned ball valve is removed without interrupting the flow and is sealed with an open-close plug 18 shown in Figure 15.

[0040] 5, when the fluid pipe 1 is cut by the cutter 72, a section 1a of the pipe tip separated from the fluid pipe 1 is held within the hole saw 72a. The cutter 72 is then pulled up together with the section 1a into the inside of the mounting flange tube 71, and the inside of the housing 5 is closed by the work valve body 31 of the work valve device 3, thereby completing the drilling of the fluid pipe 1. At this time, because the mounting position of the drilling machine 7 is close to the fluid pipe 1, the drilling machine 7 is positioned as concentrically as possible with respect to the housing 5, and even if there is a deviation in the parallelism of the connecting surface between the mounting flange of the drilling machine 7 main body and the mounting flange tube 71, the effect on the drilled portion is minimized, and drilling deviation is suppressed.

[0041] In this embodiment, the fluid pipe 1 is formed with a relatively large diameter, and therefore the area of ​​the working valve body 31 that blocks the inside of the housing 5 is also large, and the pressing force of the fluid in the pipe acting on the working valve body 31 is large. However, as described above, the structural strength of the housing 5 and the accommodating member 32 is increased by the ribs 5s, 5t provided on the housing 5 and the rib 32d provided on the accommodating member 32, which is the working valve housing, and deformation such as bending due to the pressing force of the fluid in the pipe is prevented.

[0042] Next, with the inside of the housing 5 sealed by the working valve body 31 of the working valve device 3, the drilling machine 7 is removed, and in place of the drilling machine 7, a discharger 8 is connected to the open end 5c of the neck 5d to discharge chips generated during drilling.

[0043] 6, the discharger 8 is mainly composed of a mounting flange plate 81 with an opening in the center that is fixedly attached to the open end 5c of the neck 5d, a flexible tube 83 made of an elastic member that is connected to the opening in the center of the mounting flange plate 81, an operating tube 84 that is connected to the upper end of the flexible tube 83, and a discharge pipe 85 that is inserted in a sealed state through the mounting flange plate 81, the flexible tube 83, and the operating tube 84. The rear end of the discharge pipe 85 protrudes outward from the operating tube 84, and is connected to an on-off valve (not shown) that opens and closes the inside of the discharge pipe 85.

[0044] The mounting flange plate 81 of the discharger 8 and the open end 5c of the neck 5d are fastened together in the circumferential direction by a plurality of fastening members (not shown), similar to the mounting flange tube 71 of the drilling machine 7 described above and the open end 5c of the neck 5d.

[0045] Next, the process of discharging chips by the discharger 8 will be explained. By opening an on-off valve (not shown) connected to the rear end of the discharge pipe 85, chips in the fluid pipe 1 and the housing 5 can be discharged together with the fluid. At this time, by grasping the operating tube 84 that is coaxially fitted onto the discharge pipe 85 and using the elastic deformation of the flexible tube 83 to freely tilt it relative to the mounting flange plate 81, the suction port 85a at the tip of the discharge pipe 85 can be moved to a desired position within the housing 5, so that even if chips are scattered throughout the housing 5, almost all of them can be discharged.

[0046] Next, with the inside of the housing 5 blocked by the working valve body 31 of the working valve device 3, the discharger 8 is removed, and in place of this discharger 8, a flow control valve 10 for controlling the fluid in the pipe is connected to the open end 5c of the neck 5d.

[0047] Prior to installation of this control valve 10, as shown in Figures 7 and 8, a flange portion 16a formed at the lower end of a housing tube 16 that houses the flow control valve 10 so that it can be moved up and down is hermetically connected to the open end 5c of the neck portion 5d with a plurality of fastening members 16d in the circumferential direction. The housing tube 16 is formed as a bottomed tube whose lower end is open and whose upper part is closed by a closing lid 16b with a through-hole in the center. A communication opening 27 that connects the inside and outside of the housing tube 16 is formed in the closing lid 16b, and a ball valve is normally screwed into this communication opening 27.

[0048] An insertion machine 60 is provided inside the housing cylinder 16 as an insertion means for inserting the flow control valve 10 into the housing 5. The insertion machine 60 is attached so that the flow control valve 10 can be moved vertically from the outside of the housing cylinder 16 and can be attached and detached. The insertion machine 60 extends so as to penetrate vertically through the center of the upper part of the housing cylinder 16, and is mainly composed of, in order from the center, an extension rod 61, an operating rod 62, and an insertion cylinder 63.

[0049] 12(a), the extension rod 61 has a lower end that threads into the mounting jig 26 attached to the upper end of the valve housing 12 of the flow control valve 10, and an upper end that extends above the housing cylinder 16. An operating rod 62 that fits over the extension rod 61 is pivotally supported rotatably but immovably in the axial direction relative to an upper cylindrical portion 16c that constitutes the housing cylinder 16 and covers the through-hole of the closure lid 16b, and has a grip portion 62a at its upper end for rotational operation. Furthermore, an insertion cylinder 63 that fits over the operating rod 62 is pivotally supported imrotatably but movably in the axial direction relative to the upper cylindrical portion 16c, and has a lower end 63a that is clamped vertically between the mounting jig 26 and the flange 61a of the extension rod 61, and has a female thread portion 63b that threads into a male thread portion 62b of the operating rod 62.

[0050] 8(b), a through-hole 63c that is approximately square in plan cross section is formed in the lower end 63a of the insertion tube 63, and the protruding end 26a of the mounting jig 26, which is approximately square in plan view and protrudes to complement this through-hole 63c, is fitted into the through-hole 63c. In this manner, the flow control valve 10 to which the mounting jig 26 is attached is restricted from moving in the circumferential direction relative to the insertion tube 63. Note that the planar shape of the through-hole 63c of the insertion tube 63 and the protruding end 26 of the mounting jig 26 that complements it is not limited to an approximately square shape, and may be any non-circular shape such as a rectangular, elliptical, or oval shape.

[0051] 7, the flow control valve 10 is mainly composed of a plug 11 (valve element) that passes through a perforated hole 1b in the fluid pipe 1 and moves up and down to open and close the inside of the pipe, and a valve housing 12 that houses the plug 11 so that it can move up and down and has a peripheral side part 13 with an open lower end. The valve housing 12 is equipped with a shaft member 14 that extends up and down while being rotatable and pivoted so that it cannot move back and forth, and the plug 11 is threadedly engaged with this shaft member 14, and the plug 11 can move up and down relative to the valve housing 12 by rotating an operating part 14a at the upper end of the shaft member 14 that protrudes outward from the valve housing 12.

[0052] 15, plug 11 is primarily composed of female threaded piece 11a with a female thread that is threaded onto shaft member 14, plug body 11b made of an elastic material, plug body 11c made of a rigid material such as a metal piece or plastic that engages with female threaded piece 11a and moves in accordance with it, and fastening members 15 consisting of bolts and nuts integrally molded with plug body 11b by vulcanization or the like, that connect plug body 11b to plug body 11c. Plug 11 moves into the pipe through hole 1b of fluid pipe 1 below as shaft member 14 rotates, and plug 11b comes into close contact with hole 1b and inner circumferential surface 1c of fluid pipe 1 over the entire circumference, completely blocking the flow path in the pipe or partially blocking the flow path in the pipe depending on the amount of movement of plug body 11c, thereby enabling flow rate control. The plug 11b is preferably made of rubber with different hardnesses for its upper circumferential portion, which seals the hole 1b, and its lower U-shaped portion, which seals the inner circumferential surface 1c of the fluid pipe 1. The upper circumferential portion and the lower U-shaped portion are preferably integrally molded and attached to the fastening member 15 by adhesive or vulcanization. This prevents the U-shaped portion from being washed away by the flow rate and facilitates insertion of the plug 11b. It is particularly desirable for the circumferential portion to be soft and the U-shaped portion to be hard, and for these to be integrally formed. Furthermore, the female thread piece 11a initially descends simultaneously with the plug 11b and the plug body 11c. However, when the plug 11b contacts the bottom of the inner circumferential surface of the pipe, the female thread piece 11a moves significantly downward relative to the plug 11b and the plug body 11c, and the blades on both sides of the female thread piece 11a push the plug 11b outward, thereby assisting in watertightness. Furthermore, the fixing member 15 forms a core within the elastic plug body 11b, preventing the U-shaped portion from being swept away by the flow rate. The plug body 11b may be vulcanized onto the plug body 11c or may be vulcanized and coated to cover the entire body.

[0053] Furthermore, the valve housing 12 of the flow control valve 10 has a recess 13b formed over the entire periphery on the outer peripheral surface of the lower end side of the peripheral side portion 13, and a sealing member 21 is provided in this recess 13b.

[0054] As shown in FIG. 9(a), the sealing member 21 of this embodiment is made of an annular, integrally formed elastic material. The sealing member 21 comprises a base-side retaining portion 21a, which is retained between the bulging portion 13c formed on the bottom surface of the recess 13b and the inner wall of the recess 13b, and a deforming portion 21b connected to the retaining portion 21a and allowing elastic deformation. In the natural state before elastic deformation, the sealing member 21 has a larger outer diameter than the inner diameter of the neck portion 5d. Furthermore, the deforming portion 21b of this embodiment has a generally bulbous cross-sectional shape that smoothly bulges in the radial direction and toward the tip. This allows the deforming portion 21b to receive fluid pressure evenly across almost the entire outer surface and elastically deform into a gently curved surface with a large radius of curvature, thereby providing a wide sealing surface with the inner circumferential surface of the neck, facilitating insertion of the valve housing.

[0055] Next, the installation process of flow control valve 10 will be described. First, as shown in Figure 7, with accommodating cylinder 16 accommodating flow control valve 10 therein as described above hermetically connected to open end 5c of housing 5, before working valve body 31 is opened, connecting hose 25 is used to connect communicating opening 17 provided in neck 5d of housing 5 below working valve body 31 with communicating opening 27 provided in the closure lid of accommodating cylinder 16 above working valve body 31. In this way, the fluid in fluid pipe 1 is gradually introduced into accommodating cylinder 16 via communicating opening 17, connecting hose 25 and communicating opening 27 due to its fluid pressure.

[0056] In this way, by introducing the fluid in the fluid pipe 1 into the containing cylinder 16, it is possible to adjust the pressure inside the containing cylinder 16 and the fluid pipe 1 to the same pressure before opening the working valve body 31. Alternatively, the containing cylinder 16 may be hermetically connected to the open end 5c of the housing 5 and filled with water by opening the blocking lid 16b, or the containing cylinder 16 may be hermetically connected and filled with water using the communication opening 27, and then communicated with the connecting hose 25 to adjust the pressure inside the containing cylinder 16 to the same pressure.

[0057] Furthermore, by using the neck portion 5d of the housing 5 as the location for forming the communication opening 17, there is a high degree of freedom in designing the location for forming the communication opening 17, and the work of connecting the inside of the housing 5 separated by the operating valve body 31 can be easily performed.

[0058] In addition, either or both of the communicating opening 17 below the working valve body 31 and the communicating opening 27 above the working valve body 31 may be provided in the accommodating member 32 of the working valve device 3, or they may be provided together.In this way, by providing a communicating opening in the working valve housing closer to the working valve body 31 that separates the inside of the housing 5, the communicating passage can be made shorter.

[0059] At this time, air remaining in the housing cylinder 16 is released to the outside by opening the air vent hole 28 provided in the closing lid 16b of the housing cylinder 16 in an openable and closable manner. In this way, when the inside of the housing 5 partitioned by the working valve body 31 is made to communicate, the air inside the housing 5 can be discharged, and the inside of the housing 5 can be filled with the fluid in the pipe.

[0060] Next, as shown in Figure 8, the working valve body 31 is opened and the flow control valve 10 in the receiving tube 16 is installed facing downward toward the housing 5. More specifically, by rotating the grip portion 62a of the operating rod 62 of the insertion machine 60 in the forward direction, the insertion tube 63 threaded onto this operating rod 62 moves downward. As the insertion tube 63 moves downward, a downward pressing force is applied to the flow control valve 10 via the mounting jig 26, causing the flow control valve 10 to move gradually downward within the neck 5d. Note that the extension rod 61 threaded onto the mounting jig 26 also moves downward following the flow control valve 10.

[0061] At this time, as described above, the pressure inside the housing cylinder 16 is adjusted to the same pressure as inside the fluid pipe 1, and there is no pressure difference, so that the flow control valve 10 can be pressed with a small pressing force. Furthermore, for example, a hydraulic pump may be connected to the communication opening 27 to increase the pressure inside the housing cylinder 16 (outside the open end 5c), thereby assisting the pressing force.

[0062] 10 and 11, the flow control valve 10 is pressed to an installation position where the sealing member 21 extends below the opening 5b and is in close contact with the inner circumferential surface 5j of the neck 5d. At this installation position, the press bolt 5f for temporary fixing provided on the flange 5e of the neck 5d is screwed inwardly, and its tip fits into a recess formed in the protruding portion 13d that protrudes outwardly from the circumferential side 13 of the valve housing 12. As a result, the flow control valve 10 inserted into the neck 5d of the housing 5 is restricted from coming out or rotating upward relative to the housing 5.

[0063] After installing the flow control valve 10 as described above, the insertion machine 60 is operated to remove the receiving tube 16 that was attached to the flow control valve 10. More specifically, as shown in Figures 12(a) to 12(c), first, the extension rod 61 that is threaded into the mounting jig 26 is removed from the mounting jig 26 by fitting a turning tool (not shown) or the like to the upper end of the extension rod 61 and rotating it. Next, the gripping portion 62a of the operating rod 62 is rotated in the reverse direction, and the insertion tube 63 that is threaded into the operating rod 62 moves upward, thereby removing the lower end 63a from the tip 26a of the mounting jig 26 that has been fitted into the mounting jig 26 to form a generally rectangular shape in plan view.

[0064] After operating the insertion machine 60 as described above and disconnecting it from the flow control valve 10, the fluid in the pipe introduced into the holding tube 16 is discharged through a drain section not shown, and the holding tube 16 is removed from the housing 5 together with the insertion machine 60.

[0065] In this way, the insertion machine 60, which inserts the flow control valve 10 to the installation position in the housing, is removably attached to the flow control valve 10 in a sealed state, so that after the flow control valve 10 has been inserted to the installation position in the housing 5, the insertion machine 60 can be removed without causing fluid leakage.

[0066] Furthermore, at the installation position of the flow control valve 10, a through-hole (not shown) that penetrates from the inside to the outside of the valve housing 12 and is normally closed by an open / close plug or the like may be opened to release air remaining inside the valve housing 12 of the sealed flow control valve 10. Here, the through-hole is preferably formed near the upper end of the valve housing 12, and by doing so, it is possible to release almost all of the air inside the valve housing 12 to the outside without leaving any remaining air.

[0067] Next, the working valve devices 3 attached to the openings 5b of the housing 5 are sequentially removed. At this time, the sealing member 21 seals the inner circumferential surface 5j of the neck 5d below the openings 5b, preventing leakage of the internal fluid even when the openings 5b are opened. Therefore, the working valve devices 3 can be removed without sealing with the stopper 11, and there is no risk of the working valve devices 3 becoming obsolete. Furthermore, because a portion of the working valve device 3 corresponding to the working valve housing is formed on the neck 5d of the housing 5, the working valve devices 3 themselves can be made smaller and lighter, and can be easily removed. As shown in FIG. 13 , a blocking cap 9 is removably attached to hermetically close the periphery of the opening 5b after the working valve devices 3 are removed, and an annular blocking ring 40 is attached circumferentially to the flange portion 5e of the open end 5c of the neck 5d with multiple fastening members 41. [Example]

[0068] Next, an installation method and installation device for a fluid control device according to a second embodiment will be described with reference to Figures 17 and 18. Note that since the configuration is the same as in the above-described embodiment, some overlapping explanations will be omitted.

[0069] First, as shown in Figure 17, the outer surface of the fluid pipe 1, which will be the mounting location of the fluid control device according to the present invention, is cleaned, and then a housing 5 constituting the fluid control device is hermetically fitted onto the fluid pipe 1 via a sealing member 4 (see Figure 2) for sealing the perforated portion of the fluid pipe 1. The housing 5 has a divided structure consisting of multiple divided bodies, and in this embodiment, it is mainly composed of a first divided body 51 constituting the upper side and a second divided body 52 constituting the lower side. Furthermore, the first divided body 51 and the second divided body 52 are hermetically joined by fastening members 2 consisting of bolts and nuts.

[0070] 17(a), the first divided body 51 of the housing 5 is formed in an inverted T shape when viewed from the front, and is composed of a conduit casing portion 5a extending in the conduit direction along the fluid pipe 1, and a cylindrical neck portion 5d that branches off in the vertical direction approximately at the center of the conduit casing portion 5a and extends, has an open end portion 5c that opens upward, and an opening portion 5b that opens to the side. End faces 5u, 5u that extend in an arc shape in the circumferential direction and are flat in the direction perpendicular to the conduit are formed on both ends of the conduit casing portion 5a in the conduit direction.

[0071] The second divided body 52 of the housing 5 is composed of a conduit casing portion 5A that extends in the conduit direction along the fluid pipe 1. At both ends of the conduit casing portion 5A in the conduit direction, end faces 5U, 5U that extend in an arc shape in the circumferential direction and are flat in the direction perpendicular to the conduit are formed so as to be substantially flush with the end faces 5u, 5u of the first divided body 51.

[0072] Furthermore, movement prevention fittings 90, which serve as movement prevention means in this embodiment, are fitted onto the fluid pipe 1 at positions abutting or close to the end faces 5u, 5u and end faces 5U, 5U on both sides of the casing 5 in the pipe direction. The movement prevention fitting 90 has a split structure made up of multiple split fittings, and in this embodiment is mainly composed of a first split fitting 91 that forms the upper side and a second split fitting 92 that forms the lower side. Furthermore, the first split fitting 91 and the second split fitting 92 are fastened together by fastening members 6 made up of bolts and nuts with a fastening force sufficient to prevent relative movement between them.

[0073] The housing 5 and the movement-preventing fitting 90 are connected to each other via connecting fittings 95 serving as connecting means. More specifically, in this embodiment, a pair of connecting fittings 95 are provided, one above the other, to connect the first division 51 of the housing 5 to the first split member 91 of the movement-preventing fitting 90, and to connect the second division 52 of the housing 5 to the second split member 92 of the movement-preventing fitting 90. Each connecting fitting 95 is composed of a plate-shaped installation piece 96 that spans the first division 51 (second division 52) and the first split member 91 (second split member 92) in the pipeline direction, and a connection bolt 97 that is inserted through a through hole formed in the installation piece 96, a bolt hole in the first division 51 (second division 52), and a bolt hole in the first split member 91 (second split member 92) to fasten the bolts. The mounting position of the connecting fitting 95 may be positioned outside the nuts that constitute the fastening member 2 that fastens the first split body 51 and the second split body 52, and the nuts that constitute the fastening member 6 that fastens the first split tool 91 and the second split tool 92, as shown in Figure 17, or the mounting position of the connecting fitting 95 may be positioned inside the nuts that constitute the fastening member 2 and the nuts that constitute the fastening member 6, that is, in a position that contacts the flanges for connecting the first split body 51 and the second split body 52 together and the flanges for connecting the first split tool 91 and the second split tool 92 together.

[0074] 17 , a cylindrical spacer 99 having a diameter smaller than that of the connection bolt 97 may be provided in a through hole formed in the flanges for connecting the first and second segments 51 and 52 and the flanges for connecting the first and second segments 91 and 92, or in a through hole in the installation piece 96, through which the connection bolt 97 is inserted. This reduces the gap through which the connection bolt 97 moves. Similarly, although not specifically shown, a cylindrical spacer may be provided in a through hole formed in the flanges of the first and second segments 51 and 52 for inserting the fastening member 2, or in a through hole formed in the flanges of the first and second segments 91 and 92 for inserting the fastening member 6. The length of the portion of the spacer 99 inserted into the through hole may be set to a length that allows simultaneous insertion of multiple through holes, such as through holes arranged approximately coaxially in the vertical direction of the flanges for connecting the first and second segments 51 and 52. In addition, without using the aforementioned connecting fittings 95 and spacers 99, movement prevention fittings 90, 90 may be arranged so as to contact the end faces 5u, 5u of the first division 51 and the end faces 5u, 5u of the second division 52 of the housing 5, thereby preventing movement.

[0075] Although not specifically shown, the inner circumferential surfaces of the first and second split members 91 and 92 constituting the movement prevention fitting 90 are provided with a single or multiple locking ridges, similar to the locking ridge 120b shown in FIG. 22 (described later), so that the locking ridges bite into the outer surface of the fluid pipe 1. The locking ridges may be multiple circumferential or axially arranged, and may be, for example, spiral, mesh, or lattice-shaped. Alternatively, no locking ridges may be provided. Furthermore, a rubber plate may be attached to substantially the entire inner circumferential surface of the first and second split members 91 and 92 constituting the movement prevention fitting 90 as an anti-slip material. This prevents the movement prevention fitting 90 from moving relative to the outer surface of the fluid pipe 1 and keeps it in its externally fitted position. The anti-slip material may be, for example, multiple small rubber pieces attached at different locations, or the split members themselves may be made of a material such as a resin with low slip properties.

[0076] In this way, by providing anti-movement fittings 90, 90 at positions abutting or close to both sides of the housing 5 in the pipeline direction, movement in the pipeline direction is prevented even if a load described below is applied to the housing 5.

[0077] More specifically, when plug 11 (see FIG. 14) inside flow control valve 10 connected to first divided body 51 constituting housing 5 is moved downward to block fluid pipe 1, the pressure inside the pipe toward the downstream side is applied to plug 11, and further applied to first divided body 51 via plug 11. Then, an external force acts on first divided body 51 in a direction moving it downstream relative to second divided body 52 by at least the amount of loose fit of the bolt hole through which fastening member 2 is inserted (for example, about 10 mm).

[0078] In response to this, the anti-movement fitting 90 provided on the downstream side of the housing 5 in the pipeline direction comes into contact with the end face 5u of the first divided body 51 of the housing 5, thereby resisting the external force acting on the first divided body 51 downstream and preventing the first divided body 51 from moving so that it remains in its original position.

[0079] In addition, since the anti-movement fitting 90 provided on the upstream side of the housing 5 in the pipeline direction is connected to the housing 5 via a connecting fitting 95, the first divided body 51 can be supported so that it remains in its original position against external forces acting on the first divided body 51 downstream.

[0080] In this way, by installing the movement prevention fitting 90 on the fluid pipe 1 to prevent the housing 5 from moving in the pipe direction, even if the flow control valve 10 is blocked and the pressure of the fluid in the pipe acts on the housing 5, the movement prevention fitting 90 can prevent the housing 5 from moving, thereby maintaining high controllability of the fluid.

[0081] Furthermore, when the plug body 11 is moved upward from the blocked state of the flow control valve 10 described above and the fluid pipe 1 is opened, the load on the plug body 11 that was pressed downstream when blocked is released, and the elastic restoring force of the elastic material that makes up the plug body 11 acts to return the first partition body 51 to its original upstream position.

[0082] Furthermore, when this movement prevention fitting 90 is attached to the housing 5 to which the drilling machine 7 is attached during the drilling shown in FIG. 4, it is also possible to prevent the position of the hole 1b from shifting.

[0083] Next, first to fourth modified examples of the movement prevention means will be described with reference to Figures 19 to 23. Note that since the configuration is the same as in the above-described embodiment, some overlapping explanations will be omitted.

[0084] 19 and 20, a movement-preventing fitting 100 is fitted onto the fluid pipe 1 as the movement-preventing means of Modification 1. The movement-preventing fitting 100 has a split structure made up of multiple split tools, and in this modification, as shown in Fig. 19(b), it is mainly composed of a first split tool 101 that forms the diagonally upper side and a second split tool 102 that forms the diagonally lower side, with an imaginary inclined plane C that is inclined at approximately 45 degrees with respect to the horizontal plane as the boundary. Furthermore, the first split tool 101 and the second split tool 102 are fastened together by fastening members 6 made up of bolts and nuts with a fastening force sufficient to prevent relative movement between them.

[0085] The housing 5 and movement-preventing fitting 100 are connected to each other via connecting fittings 105, which serve as connection means. More specifically, the connecting fittings 105 of this modified example are provided in pairs in the circumferential direction so as to connect the first and second divisions 51 and 52 of the housing 5 to the first split member 101 of the movement-preventing fitting 100, and also to connect the first and second divisions 51 and 52 of the housing 5 to the second split member 102 of the movement-preventing fitting 100. Each connecting fitting 105 is composed of an erection bolt 106 that is spanned in the pipeline direction between the first division body 51, the second division body 52, and a flange 103 fixedly attached to the first division body 101 (second division body 102), a connecting nut 107 that threads onto the erection bolt 106 and engages with the flange 103, and a connecting bolt 108 that engages with an engaging portion 106a formed on the head of the erection bolt 106 and is inserted into the bolt holes of the first division body 51 and the second division body 52 to be fastened.

[0086] With this configuration, by appropriately setting the degree of threading of the erection bolt 106 and the connection nut 107 that make up the connecting fitting 105, the close contact, abutment or proximity state between the housing 5 and the movement prevention fitting 100 in the pipeline direction can be adjusted continuously.

[0087] 21, the movement prevention means of the second modification is composed of a movement prevention fitting 90 fitted onto the outside of the fluid pipe 1, and an engagement portion 110 provided on the housing 5. More specifically, the engagement portion 110 is composed of recesses 111 formed at both ends of the flange 51a of the first divided body 51 for the fastening member 2, and protrusions 112 formed at both ends of the flange 52a of the second divided body 52, which engage with the recesses 111 in the pipe direction.

[0088] With this configuration, when downstream-directed pipe pressure is applied to the first segment 51 as the plug 11 inside the flow control valve 10 moves, the movement-preventing fitting 90 provided downstream of the housing 5 in the pipe direction resists the external force acting on the first segment 51. Furthermore, the recess 111 formed in the first segment 51 engages with the protrusion 112 of the second segment 52, which in turn resists the external force acting on the first segment 51 in the pipe direction, preventing the first segment 51 from moving. In this case, the movement-preventing fitting 90 and the connecting fitting 95 can be omitted, and the second segment 52 can be used as a movement-preventing device. In this case, the inner circumferential surface of the second segment 52 may be provided with one or more locking protrusions, as provided on the inner circumferential surface of the movement-preventing fitting 90 described above. Furthermore, instead of the engagement between the recess 111 and the protrusion 112, the aforementioned spacer 99 may be used for engagement.

[0089] 22, the movement prevention means of Modification 3 is composed of movement prevention fittings 120 fitted onto the fluid pipe 1 on both sides of the casing 5 in the pipe line direction. More specifically, movement prevention fittings 120 have an engaging recess 120a that engages with a bulging portion 5v that bulges outwardly at the end of the first divided body 51 of the casing 5 in the pipe line direction, and a plurality of locking ridges 120b formed in the axial direction along the circumferential direction on the inner circumferential surface of movement prevention fitting 120. Note that only a single locking ridge 120b may be provided, or it may not be provided at all.

[0090] With this configuration, when the stopper body 11 inside the flow control valve 10 moves and the pressure inside the pipe toward the downstream side is applied to the first divided body 51, the engagement recess 120a of the anti-movement fitting 120 provided on the upstream side of the housing 5 in the pipe line direction engages the bulge portion 5v of the first divided body 51, and the engagement protrusion 120b bites into the outer surface of the fluid pipe 1, so that the anti-movement fitting 120 can counteract the external force acting on the first divided body 51 in the pipe line direction and prevent the first divided body 51 from moving.

[0091] 23, the movement prevention means of the fourth modification is composed of movement prevention fittings 130 fitted onto the fluid pipe 1 on both sides in the pipe direction of the housing 5. More specifically, the movement prevention fittings 130 have an engaging recess 130a that engages with a bulging portion 5v that bulges outwardly at the end of the first divided body 51 of the housing 5 in the pipe direction, and a locking member 131 provided in a recess 130b formed on the inner surface of the movement prevention fitting 130.

[0092] With this configuration, when downstream-directed pipe pressure is applied to first divided body 51 as plug 11 moves inside flow control valve 10, engagement recess 130a of movement-prevention fitting 130 provided on the upstream side of housing 5 in the pipe direction locks bulging portion 5v of first divided body 51, and as locking member 131 tilts clockwise in the illustration within recess 130b, tip claw 131a formed on its inner diameter side bites into the outer circumferential surface of fluid pipe 1 (see dotted line in the illustration), whereby movement-prevention fitting 130 can resist the external force acting on first divided body 51 in the pipe direction and prevent movement of first divided body 51. Also, although not specifically shown, movement-prevention fitting 130 may be provided with a push bolt for pressing in locking member 131.

[0093] As described above, according to the installation method and installation device for a fluid control device of the present invention, with the inside of open end 5c and the outside that sealably surrounds open end 5c at the same pressure, the tip of valve housing 12 of flow control valve 10 can be sealed by annular sealing member 21 at an installation position where it exceeds opening 5b in neck 5d, so that opening 5b and open end 5c can be blocked simultaneously in this sealed state. Therefore, even if fluid pipe 1 has a relatively large diameter, the pressing force required to install flow control valve 10 can be reduced, allowing it to be accurately installed in the desired position, and the fulcrum when valve element 11 of flow control valve 10 is inserted into bore 1b of fluid pipe 1 is ensured, improving the positional accuracy of valve element 11 and enhancing controllability of the fluid in the pipe. In addition, the lightweight and compact operating valve device 3 can be easily attached and detached without the need to operate valve element 11.

[0094] Furthermore, the housing 5 has a split structure that hermetically fits onto the fluid pipe 1, and the hole 1b of the fluid pipe 1 is formed by drilling using a drilling machine 7, so that the existing fluid pipe 1 can be drilled without interrupting the flow and the valve body 11 can be inserted. In particular, the neck 5d of the housing 5 has an opening 5b for attaching and detaching the working valve device 3, so that the attachment position of the working valve device 3 can be brought closer to the fluid pipe 1, thereby shortening the drilling stroke and minimizing misalignment of the drilling position, and also enabling the drilling machine 7, working valve device 3, and other construction equipment to be made smaller, lighter, and less expensive.

[0095] Furthermore, by opening working valve body 31 while the interiors of housing 5 separated by working valve body 31 are in communication with each other and at the same pressure, the tip of valve housing 12 of flow control valve 10 can be sealed by annular sealing member 21 at an installation position beyond opening 5b in neck 5d, and therefore opening 5b and open end 5c can be blocked simultaneously in this sealed state. Therefore, the pressing force required to install flow control valve 10 can be reduced, allowing it to be installed accurately in the desired position.

[0096] 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 the present invention also includes modifications and additions that do not deviate from the gist of the present invention.

[0097] For example, in the above embodiment, a hole 1b is drilled in the fluid pipe 1 inside the housing 5 by a drilling means, and the plug 11 (valve body) of the flow control valve 10 is inserted into this hole 1b, but the hole of the fluid pipe of the present invention is not limited to this and may be, for example, a hole such as a branch hole formed in advance in a T-shaped pipe as a fluid pipe, or a check valve that is joined to the fluid pipe in a flange or receiving manner.

[0098] 16 , a block lid 45 as a retaining member according to the present invention may include a flat covering portion 46 that hermetically covers the opening 5b, and an outer fitting portion 47 that is connected to the flat covering portion 46 and bifurcates into a generally U-shape in plan view so as to be able to fit externally along the circumferential surface of the valve housing 12 of the flow control valve 10, and a recessed groove 13e for fitting the outer fitting portion 47 into the outer circumferential surface of the circumferential side portion 13 of the valve housing 12. In this way, the opening 5b communicating with the inside of the neck 5d is used to seal the opening 5b of the housing 5, and at the same time, the outer fitting portion 47 of the block lid 45 can be fitted externally into the recessed groove 13e of the circumferential side portion 13 of the valve housing 12. This makes it possible to easily hold the flow control valve 10 and prevent it from slipping out of the housing 5. Furthermore, by using this blocking lid 45, the press bolt 5f for temporary fixing provided on the housing 5 in the above embodiment can be omitted, and the structure can be simplified.

[0099] Furthermore, the concave groove 13e on the peripheral side portion 13 of the valve housing 12 may be recessed endlessly around the entire circumference of the valve housing 12, but by recessing it around approximately half the circumference as in this modified example, the tip portion 47a of the outer fitting portion 47 abuts against the peripheral end portion 13f of the concave groove 13e, thereby positioning the flow control valve 10 circumferentially.

[0100] Furthermore, for example, in the above-described embodiment, the deformation portion 21b that allows the sealing member 21 to elastically deform is formed into a substantially bulbous cross-sectional shape that bulges smoothly in the inner and outer radial directions and toward the tip. However, this is not limited to this. For example, as a modified example 1 of the sealing member according to the present invention, as shown in FIG. 9(b), the deformation portion 23b of the sealing member 23 may have a bulging portion 23c that bulges in the inner and outer radial directions, a protruding portion 23d that protrudes toward the tip, and a recessed portion 23e that is formed in a recessed shape across these, and by doing so, the pressure of the fluid in the pipe is applied to the surface of the recessed portion 23e that is formed in a recessed shape across the bulging portion 23c that bulges in the inner and outer radial directions and the protruding portion 23d, thereby obtaining a lip seal effect that brings the bulging portion 21c into close contact with the inner surfaces 5h, 5j of the neck portion 5d and the recess 13b of the circumferential side portion 13, and improving the sealing performance.

[0101] Alternatively, as a second modified example of the sealing member according to the present invention, as shown in FIG. 9(c), the deforming portion 24b of the sealing member 24 may be formed in a generally circular cross section with a notch 24e on its outer periphery. This allows for a large allowance for elastic deformation in the outer diameter direction, thereby improving the sealing function between the deforming portion 24b and the inner circumferential surface of the neck after elastic deformation.

[0102] Furthermore, for example, in the above embodiment, the flow control valve 10 has a plug 11 as its valve body that passes through the hole 1b of the fluid pipe 1 and comes into close contact with the inner surface 1c, but this is not limited to this, and any type of valve body can be applied as long as it is capable of controlling the fluid in the pipe.

[0103] For example, in the above embodiment, the hole was drilled using a hole saw 72a with a diameter smaller than that of the fluid pipe 1, but this is not limited to this. It is also possible to cut a portion of the fluid pipe inside the housing 5 using a hole saw, a cutting tool, a wire saw tool, etc. with a diameter larger than that of the fluid pipe 1, remove the cut piece, and install a plug that seals the inner surface of the housing as a valve seat, or a flow control valve with an internal valve box that incorporates a valve body, in a continuous flow state.

[0104] Furthermore, for example, in the above embodiment, the communication openings 17 and 27 are connected by the connecting hose 25 to equalize the pressure, but this is not limited to this. For example, a through hole (not shown) may be provided in the valve housing 12, and a check valve may be connected to the through hole, and the check valve may be opened when the flow control valve is inserted and closed after insertion to equalize the pressure and simultaneously bleed air. [Explanation of symbols]

[0105] 1 Fluid tube 1b Hole 1c Inner surface 3 Working valve device 5. Cabinet 5b opening 5c open end 5d neck 5e Flange 5f push bolt 5h Inner surface 5j Inner surface 7 Drilling machine 8 Discharge machine 9 Occlusion lid 10. Flow control valve 11 Plug (valve) 12 Valve housing 13 Side 14 Shaft member 16 Storage tube 17 Communication opening 18 Opening and closing plug 21 Sealing member 21b Deformed part 23 Sealing material 24 Sealing member 25 Connecting hose 26 Mounting jig 27 Communication opening 28 Air vent 29 Discharge hose 31 Working valve body 32 Storage member 34 Shaft member 40 Occlusion Ring 45 Occlusion lid 46 Covering part 47 External fitting part 51 1st division body 52 Second division body 60 Insertion Machine 61 Extension rod 62 Operation lever 63 Insertion tube 71 Mounting flange cylinder 72 cutter 73 Advancement / retraction mechanism 74 Drive motor 81 Mounting flange plate 83 Flexible tube 84 Operation tube 85 Discharge pipe 90 Anti-movement fittings (anti-movement means) 99 Spacer 100 Anti-movement fittings (anti-movement means) 110 Engagement part (movement prevention means) 120 Anti-movement fittings (anti-movement means) 130 Anti-movement fittings (anti-movement means)

Claims

1. 1. An installation method for installing, in an uninterrupted flow state, a fluid control device having at least a housing that is installed in a fluid pipe in a sealed state, and a flow control valve that includes a valve body and a valve housing that can seal the inner surface of a hole of the fluid pipe formed in the housing and the inner circumferential surface of the fluid pipe, a movement prevention means for preventing movement of the housing is provided in the fluid pipe; After forming the hole by a drilling means for drilling the fluid pipe, the inside of the housing is closed by a working valve device that can open and close the inside of the housing; The flow control valve and its insertion device are installed outside the housing, and the inside of the housing is opened by the working valve device; a fluid control device installation method, characterized in that the flow control valve is installed by the insertion machine so that the valve body can be inserted into the hole and the fluid pipe.

2. An installation device for installing a fluid control device in an uninterrupted flow state, the installation device comprising at least a housing that is installed in a sealed state in a fluid pipe, and a flow control valve that includes a valve body and a valve housing that can seal the inner surface of a hole portion of the fluid pipe formed in the housing and the inner circumferential surface of the fluid pipe, a movement prevention means installed in the fluid pipe for preventing movement of the housing; an operating valve device that closes the inside of the housing after the hole is formed by a drilling means that drills a hole in the fluid pipe; an insertion machine installed outside the housing and configured to insert the flow control valve; An installation device for a fluid control device, characterized in that the inside of the housing is opened by the working valve device, and the flow control valve is installed by the insertion machine so that the valve body can be inserted into the hole and the fluid pipe.

3. 3. The installation device for a fluid control device according to claim 2, wherein the housing and the movement prevention means are connected to each other via a connecting means.

4. 4. The installation device for a fluid control device according to claim 3, wherein the connecting means has at least a bridge piece that is bridged and connected between the housing and the movement prevention means in the pipeline direction.

5. The fluid control device installation device described in claim 4, characterized in that the connection means has connection bolts inserted into through holes formed in the installation piece at intervals in the pipeline direction, through holes formed in the housing, and through holes formed in the movement prevention means.

6. 6. The fluid control device installation device according to claim 5, wherein a spacer having an inner diameter larger than that of the connecting bolt and an outer diameter smaller than that of the through hole is inserted into the connecting bolt.

Images