JPWO2020049922A1 - Fluid control device - Google Patents

Abstract

The position accuracy of the hole drilled in the fluid pipe in the housing and the valve body to be inserted into the hole is improved to improve the controllability of the fluid in the pipe, and the drilling device, the flow control valve installation device, the work valve device, etc. We provide a fluid control device that can reduce the size, weight, and cost of construction equipment. Inserted into the divided structure housing (5) in which the fluid pipe (1) is fitted in a sealed manner and the hole (1b) of the fluid pipe (1) drilled in the housing (5) in a continuous flow state. A fluid control device having at least a flow control valve (10) provided with a possible valve body (11) and a valve housing (12), the housing (5) being controlled by the housing (5). A neck having an open end (5c) for installing a flow valve (10) and an opening (5b) for attaching and detaching a work valve device (3) capable of opening and closing the inside of the housing (5). (5d) is provided between the peripheral surface of the valve housing (12) of the flow control valve (10) and the peripheral surface of the fluid tube (1) side of the opening (5b) of the neck portion (5d). , A first sealing member (21) formed in an annular shape is provided.

Description

The present invention controls a fluid in a pipe by inserting a valve body into a housing having a split structure in which the fluid pipe is fitted so as to be sealed and a valve body is inserted into a hole of the fluid pipe which is perforated in a continuous flow state in the housing. The present invention relates to a fluid control device having a flow valve.

In the conventional fluid control device, a housing (split T-shaped pipe) having a split structure is fitted onto an existing fluid pipe in a sealed manner, and a work valve device (for work) is provided at the open end of the upper end of the neck portion constituting this housing. After connecting the sluice valve) and the drilling device (drilling machine) and punching the fluid pipe inside the housing with this drilling device, the work valve device that closed the inside of the housing is replaced with the drilling device after drilling to control the flow. Using the valve installation device (work case, operating rod, jack mechanism), insert the flow control valve (valve case, sluice valve body) and connect it to the housing, and the valve body (gate valve body) of this flow control valve. Is inserted into the pipe through the hole of the fluid pipe, and the inner peripheral surface of the fluid pipe is used as a valve seat to control the fluid in the pipe (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-38884 (page 18, FIG. 33)

However, in Patent Document 1, a work valve device is connected to an open end formed at the upper end of the neck of a split T-shaped tube forming a housing fitted to the fluid pipe, and the work valve device is further connected. A drilling device or a control valve installation device was connected to the upper end of the housing, and the control valve was connected to the open end of the upper end of the neck of the housing in a sealed manner. Therefore, the extension stroke of the cutter and the control valve installation device provided in the drilling device becomes long, and the drilling or valve body cannot be inserted at the designed position, resulting in misalignment, and the controllability of the fluid in the pipe cannot be maintained high. There was a problem. In particular, when the extension stroke of the drilling device is long, a slight displacement of the surface contact of the mounting portion of the drilling device causes a large displacement of the drilling position, which may damage the valve body when the valve body is inserted. In addition, as the extension stroke becomes longer, the construction equipment such as the drilling device, the control valve installation device, and the work valve device becomes larger, which not only increases the equipment cost and the construction cost, but also increases their weight. It also caused an excessive load on the existing fluid pipe.

The present invention has been made by paying attention to such a problem, and improves the positional accuracy of the hole formed in the fluid pipe in the housing and the valve body to be inserted into the hole, and controls the fluid in the pipe. It is an object of the present invention to provide a fluid control device capable of reducing the size, weight and cost of construction equipment such as a drilling device, a check valve installation device and a work valve device.

In order to solve the above problems, the fluid control device of the present invention is used.
A flow control valve having a divided structure housing in which the fluid pipe is fitted in a sealed manner, and a valve body and a valve housing that can be inserted into the holes of the fluid pipe that are perforated in the housing in a continuous flow state. A fluid control device that has at least
The housing has a neck portion having an open end portion for installing the flow control valve in the housing and an opening for attaching and detaching a work valve device capable of opening and closing the inside of the housing.
A first sealing member formed in an annular shape is provided between the peripheral surface of the valve housing of the flow control valve and the peripheral surface of the neck portion on the fluid pipe side of the opening. It is characterized by.
According to this feature, since the neck of the housing has an opening for attaching and detaching the work valve device, the mounting position of the work valve device can be brought closer to the fluid pipe, so that the drilling stroke is shortened. , The misalignment of drilling can be minimized, and at the same time, construction equipment such as work valve devices and drilling machines can be miniaturized, lightened, and cost-reduced. Further, at a position where the valve housing exceeds the opening of the neck portion by the annular first sealing member provided between the valve housing of the flow control valve and the peripheral surface on the fluid pipe side of the opening of the neck portion. Since it can be sealed, the opening and the open end can be shut off at the same time in this sealed state. Therefore, the fulcrum when the valve body of this flow control valve is inserted into the hole of the fluid pipe is ensured, the stroke length is reduced, the position accuracy of the valve body is improved, and the controllability of the fluid in the pipe is improved. can.

A second sealing member formed in an annular shape is provided between the peripheral surface of the valve housing of the flow control valve and the peripheral surface of the neck portion on the open end side of the opening. It is characterized by that.
According to this feature, even if the first sealing member temporarily separates from the inner surface of the neck when it exceeds the opening, the second sealing member can seal the inner surface of the neck at this time, so that the valve housing can be made. The sealed state can be maintained until the insertion is completed.

The peripheral surface of the neck portion is characterized in that it is formed linearly in the insertion direction of the valve housing.
According to this feature, not only is it easy to insert the valve housing along the inner surface of the neck portion formed in a straight line, but also the sealed state of the sealing member in contact with the peripheral surface can be stabilized.

The valve housing of the flow control valve is characterized by having an air vent hole that can be opened and closed at the upper end of the valve housing.
According to this feature, since almost all the air in the valve housing can be discharged through the air vent hole formed at the upper end of the valve housing, the air in the valve housing may be compressed, leading to an unexpected accident. Not only can this be avoided, but corrosion of the valve housing can be suppressed.

The opening of the neck is characterized by opening in the conduit direction of the fluid pipe.
According to this feature, the work valve device to be attached to the opening can be extended in the direction of the conduit of the fluid pipe, so that it is easy to secure the attachment area of the work valve device.

The housing is characterized by including an engaging portion that restricts the movement of the flow control valve installed in the housing in the circumferential direction.
According to this feature, since the check valve can be restricted from moving in the circumferential direction with respect to the housing by the engaging portion, it is possible to avoid the possibility that the check valve moves due to the flow of the fluid in the pipe.

The housing is characterized by including a positioning portion for positioning the work valve device attached to the opening.
According to this feature, since the work valve device can be accurately attached to the opening by the positioning portion, the opening / closing function of the work valve device in the housing can be maintained.

It is a perspective view which shows the housing which comprises the fluid control apparatus in an Example. (A) is a partial cross-sectional front view showing a housing in which a fluid pipe is fitted, and (b) is also a side cross-sectional view. It is a plan view of the housing as in FIG. It is a perspective view which shows the work valve device attached to the housing. (A) is a plan sectional view showing the accommodating member of the work valve device, and (b) is a plan sectional view showing the mounting member of the work valve device. It is a partial cross-sectional front view which shows the drilling machine attached to a housing. It is a partial cross-sectional perspective view which shows the situation which a fluid pipe is perforated by a perforator. It is a partial cross-sectional perspective view which shows the situation which the chip is discharged by the discharger. It is a partial cross-sectional front view which shows the hydraulic rod which is the insertion means in the Example assembled to the work valve device. It is a partial cross-sectional perspective view as in FIG. It is a partial cross-sectional front view which shows the control valve assembled to the hydraulic rod. (A) is a cross-sectional view of the sealing member in the embodiment, (b) is a cross-sectional view of the sealing member in the modified example 1, and (c) is a cross-sectional view of the sealing member in the modified example 2. It is a partial cross-sectional perspective view as in FIG. It is a partial cross-sectional perspective view which shows the situation in the process of inserting a control valve by a hydraulic rod. It is a partial cross-sectional perspective view which shows the situation which the installation of the control valve is completed by the hydraulic rod. It is a partial cross-sectional perspective view which shows the control valve fixed to a housing. Similar to FIG. 16, it is a partial cross-sectional front view. It is a partial cross-sectional side view as in FIG. It is a partial cross-sectional front view which shows the screw type insertion machine which is the insertion means in the modification.

A mode for carrying out the fluid control device according to the present invention will be described below based on examples.

The fluid control device and the installation method thereof according to the embodiment will be described with reference to FIGS. 1 to 19. As shown in FIGS. 16 to 18, the fluid control device according to the present invention comprises a housing 5 on which the fluid pipe 1 is fitted, and a flow control valve 10 installed in the housing 5 for controlling the fluid in the pipe. It is mainly composed. In this embodiment, as a fluid control device and an installation method thereof, in a state of continuous flow, a predetermined location of an existing fluid pipe 1 which is a pipeline component is perforated in the housing 5, and then in the housing 5. A series of steps up to the installation of the flow control valve 10 will be described. The fluid in the fluid pipe 1 is clean water in this embodiment, but may be, for example, industrial water, agricultural water, sewage, or a liquid other than water, or a gas or gas-liquid gas-liquid. It may be a mixture.

The fluid pipe 1 of this embodiment is a ductile cast iron pipe having a relatively small diameter, and is formed as a straight pipe having a substantially circular cross section as shown in FIGS. 1 and 2. In this embodiment, the conduit direction of the fluid pipe 1 is arranged in a substantially horizontal direction. The fluid pipe according to the present invention may be made of other metals such as cast iron or steel, or may be made of concrete, vinyl chloride, polyethylene, polyolefin, or the like. Furthermore, the inner peripheral surface of the fluid pipe may be coated with an epoxy resin layer, mortar, plating or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe by powder coating.

Here, the fluid pipe of the present invention is not limited to a straight pipe as in the present embodiment, and may be composed of, for example, a deformed pipe. Here, the deformed pipe is a general term for a pipe having various deformed parts such as a curved pipe part, a branch part, a cross part, a different diameter part, a joint ring part, a short pipe part, and a drainage part. Is.

First, as shown in FIGS. 1 and 2, after cleaning the outer surface of the fluid pipe 1 which is the attachment point of the fluid control device according to the present invention, a seal for sealing the perforated portion of the fluid pipe 1 which will be described later. The housing 5 constituting the fluid control device is externally fitted through the member 4 in a sealed manner. The housing 5 has a plurality of divided structures, and in this embodiment, it is mainly composed of a first divided body 51 constituting the upper side and a second divided body 52 forming the lower side. The divided structure of the housing 5 is not limited to this embodiment, and may be divided in the horizontal direction, and the number of divisions may be divided into a predetermined number of 3 or more. Further, in this embodiment, the divided housings are joined in a sealed state by a fastening member 2 made of bolts and nuts, but the present invention is not limited to this, and for example, welding may be used.

As shown in FIGS. 1 to 3, the first divided body 51 of the housing 5 includes a pipeline housing portion 5a extending in the pipeline direction along the fluid pipe 1 and a pipeline housing portion 5a. It is composed of an open end 5c that is branched in the vertical direction at the substantially center of the above and has an opening 5c that opens upward, and a tubular neck 5d that has an opening 5b that opens laterally. Is formed in.

Further, the open end portion 5c of the neck portion 5d is formed at a pair of flange-shaped flange portions 5e and 5e protruding in the outer diameter direction toward the pipeline direction of the fluid pipe 1 and at the center position in the circumferential direction of the flange portions 5e. It has notches 5f and 5f as engaging portions recessed in the inner diameter direction.

The neck portion 5d is provided with a pipe thickness portion 5g whose outer surface protrudes in the radial direction on the peripheral side portion thereof in a tubular shape, and an opening is opened in the pipe thickness portion 5g in one direction in the pipeline direction of the fluid pipe 1. It has a part 5b. As shown in FIG. 1, the opening 5b is opened in a horizontally long substantially rectangular shape in a side view, and the work valve body 31 of the work valve device 3 is formed so as to be insertable as will be described later.

Further, as shown in FIG. 2A, the inner peripheral portion of the neck portion 5d has a curved surface having a substantially circular shape in a plan view and an inner peripheral surface 5h formed linearly in the vertical direction, and a position at the same height as the opening 5b. The recessed portion 5i recessed in the outer diameter direction and the inner peripheral surface 5h formed below the recessed portion 5i and formed substantially flush with the upper inner peripheral surface 5h and the vertical direction. A stepped portion 5k that is continuous with the lower end of the inner peripheral surface 5j and protrudes in the inner diameter direction is provided.

Next, as shown in FIGS. 4 and 5, the work valve device 3 is hermetically connected to the opening 5b of the neck portion 5d. In the work valve device 3, the work valve body 31 that slides in the housing 5 so as to be openable and closable, the accommodation interior 32a that accommodates the work valve body 31 so as to be slidable in the horizontal direction, and one end on the side thereof are opened. It is mainly composed of an accommodating member 32 as a work valve housing having an opening portion 32b, and a mounting member 33 having a curved inner peripheral surface so as to be externally fitted to the neck portion 5d together with the accommodating member 32.

As shown in FIGS. 4 to 6, the accommodating member 32 is pivotally supported so as to be rotatable and non-advancing / retractable, and includes a shaft member 34 extending in the horizontal direction, and the working valve body 31 is attached to the shaft member 34. The working valve body 31 is slidable with respect to the accommodating member 32 by rotating the operating member 35 which is screwed and attached to the tip end portion 34a of the shaft member 34 protruding outward of the accommodating member 32. Has been done. Further, support portions 36, 36 for supporting the hydraulic rod 60, which will be described later, are provided on the upper surface of the accommodating member 32 and the upper surface of the mounting member 33.

Further, as shown in FIG. 6, the upper surface of the working valve body 31 is covered with a plate-shaped sealing member 31a, and the inside of the housing 5 can be sealed in a sealed manner by the sealing member 31a.

Regarding the mounting procedure of the work valve device 3, first, the accommodating member 32 is arranged on the outer surface of the neck portion 5d at a position where the opening portion 32b communicates with the opening portion 5b of the neck portion 5d. At this time, as shown in FIGS. 4 and 5A, the pipe thickness portion 5g of the neck portion 5d has a protruding portion 5m as a pair of positioning portions protruding in the lateral direction of the opening portion 5b. By engaging the protruding portion 5 m with the inner circumference of the engaging portion 32c having a substantially L-shaped plan view and a substantially U-shaped side view formed on the side of the open portion 32b of the accommodating member 32, the accommodating member The 32 is positioned at a position where the open portion 32b and the opening 5b of the neck portion 5d communicate with each other. In this way, since the work valve device 3 can be accurately attached to the opening 5b by the protruding portion 5 m, the opening / closing function of the work valve device 3 in the housing 5 can be maintained.

Next, the mounting member 33 is arranged on the outer surface of the neck portion 5d at a position opposite to the accommodating member 32 with the neck portion 5d interposed therebetween. At this time, as shown in FIGS. 4 and 5 (b), the inner circumference of the side view substantially U-shaped engaging portion 33a formed on the mounting member 33 engages with the pipe thickness portion 5g of the neck portion 5d. As a result, the mounting member 33 is positioned at the arrangement position on the opposite side of the accommodating member 32 with the neck portion 5d interposed therebetween. Further, in the present embodiment, the engaging portion 33a is formed in a substantially U-shape in the lateral view intermittently in the circumferential direction, but is not limited to this, and is formed in a substantially U-shape in the lateral view continuously in the circumferential direction. May be done. The corner shapes of the three sides forming the side view substantially U shape of the engaging portion 32c or the corner shape of the three sides forming the side view substantially U shape of the engaging portion 33a are described in the present invention. It may have a rectangular shape as in the embodiment, or it may have a round shape.

In this way, since the work valve device 3 attached to the opening 5b can be extended in the pipeline direction of the fluid pipe 1, the upper region of the fluid pipe 1 can be used as the attachment region of the work valve device 3. It is possible to secure the area.

Next, as shown in FIG. 4, these accommodating members 32 and mounting members 33 are fastened. In this embodiment, the base ends 37a of the bolts 37 are connected to both ends of the mounting member 33 in a hinge shape, and the bolts 37 are rotated toward the accommodating member 32 to rotate the engaging portion 33a of the accommodating member 32. It is inserted into the gap portion 32d formed on the outer peripheral portion of the bolt 37, and the nut 38 is screwed into the tip of the bolt 37 to fasten the bolt. That is, in this embodiment, the bolt 37 and the nut 38 form the fastening member. In this way, since the bolts 37 constituting the fastening member are connected to the mounting member 33, not only the fastening work can be easily performed, but also the mounting member 33 is inserted as the bolt 37 is inserted into the gap 32d. It can be positioned with respect to the accommodating member 32.

Further, the accommodating member 32 is provided with a seal member 39 so as to surround the periphery of the open portion 32b, and by fastening the fastening member described above, the seal member 39 comes into close contact with the peripheral edge of the opening 5b. The opening 5b and the opening 32b are sealed. In this way, by installing the work valve device 3 in the opening 5b provided in the neck portion 5d, it is possible to bring the mounting position of the drilling machine 7 and the hydraulic rod 60, which will be described later, as close as possible to the fluid pipe 1. Therefore, as a result of shortening the extension stroke of the drilling machine 7 and the hydraulic rod 60 approaching the fluid pipe 1, the drilling machine 7 and the hydraulic rod 60 can be miniaturized, lightened, and cost-reduced (FIG. 6). , See FIG. 11).

The fastening member is not limited to this embodiment. For example, each of the accommodating member 32 and the mounting member 33 may have communication holes that communicate with each other, and bolts may be inserted into these communication holes and fastened with nuts. ..

Next, as shown in FIG. 6, the drilling machine 7 is hermetically connected to the open end portion 5c of the neck portion 5d. The drilling machine 7 advances and retracts the mounting flange cylinder 71, the cutter 72 for drilling the fluid pipe 1, the drive motor 74 for rotating the cutter 72 in the mounting flange cylinder 71, and the cutter 72 in the vertical direction. It is mainly composed of an advancing / retreating mechanism 73 for causing the engine to move. The cutter 72 is formed in a bottomed tubular shape having a diameter smaller than that of the fluid pipe 1, and has a hole saw 72a having a cutting blade at its tip along the circumferential direction and a cutting blade arranged coaxially with the rotation axis of the hole saw 72a. It is composed of a center drill 72b that protrudes toward the front. The cutter 72 is arranged concentrically with the open end 5c of the neck 5d of the housing 5, is inserted into the neck 5d of the housing 5 from the open end 5c side, and is at least the top of the fluid pipe 1. It is possible to proceed to the position where it penetrates the pipe wall.

Explaining the mounting procedure of the drilling machine 7, the concave portion 75 formed at the tip of the mounting flange cylinder 71 is fitted to the open end portion 5c of the neck portion 5d. More specifically, the concave portion 75 of the mounting flange cylinder 71 includes an inner wall portion 75a that is internally fitted to the side wall of the open end portion 5c, an outer wall portion 75b that is externally fitted to the side wall of the open end portion 5c, and these inner wall portions 75a. And an inner bottom portion 75c constituting the base end portion of the outer wall portion 75b, the inner wall portion 75a and the outer wall portion 75b sandwich the side wall of the open end portion 5c, and the inner bottom portion 75c is used as the end surface of the open end portion 5c. By abutting, the mounting flange cylinder 71 of the drilling machine 7 is fitted in a state of being positioned at the open end portion 5c of the neck portion 5d.

Further, a seal member 76 is provided on the outer peripheral surface of the inner wall portion 75a, and the seal member 76 is brought into close contact with the side wall of the open end portion 5c, so that the mounting flange cylinder 71 of the drilling machine 7 and the mounting flange cylinder 71 and the punching machine 7 are in this fitted state. The neck portion 5d of the housing 5 is sealed.

Further, in this fitted state, an engaging member 77 having a divided structure having a substantially U-shaped inner peripheral portion in cross section that engages with the outer wall portion 75b is assembled along the outer circumference of the outer wall portion 75b.

The connection work of the work valve device 3 to the opening 5b of the neck 5d and the connection work of the punch 7 to the open end 5c of the neck 5d are not necessarily limited to the above-mentioned order, and the connection work of the punch 7 is performed. After that, the work valve device 3 may be connected, or these connection operations may be performed in parallel.

Next, as shown in FIGS. 6 and 7, the step of drilling the fluid pipe 1 by the drilling machine 7 will be described. First, the working valve body 31 of the working valve device 3 is arranged in the housing interior 32a of the housing member 32. With the inside of the housing 5 open, the cutter 72 is rotated by the drive motor 74 of the drilling machine 7, and the cutter 72 is moved downward by rotating the handle 73a constituting the advancing / retreating mechanism 73 to move the cutter 72 downward. The pipe wall at the top of the pipe is perforated in a continuous flow state.

At this time, for example, as an opening communicating with the inside of the housing 5, a ball valve (not shown) is installed in the female screw hole 5p formed below the opening 5b of the housing 5, and the cutting occurs at the time of drilling. The powder is discharged to the outside together with the fluid. The chip discharge port is not limited to the above, and the opening 32e formed on the upper surface of the accommodating member 32 of the work valve device 3 is drilled by opening the opening / closing valve 32f connected to the upper end thereof. The chips generated at the time of the above may be discharged to the outside together with the fluid. The above-mentioned ball valve is removed in a continuous flow state after drilling, and instead of this, it is sealed with an opening / closing bolt 5n as shown in FIG.

Further, as shown in FIG. 7, when the fluid pipe 1 is cut by the cutter 72, the section 1a at the top of the pipe separated from the fluid pipe 1 is held in the hole saw 72a. Then, the cutter 72 is pulled up together with the section 1a into the inside of the mounting flange cylinder 71, and the inside of the housing 5 is closed by the work valve body 31 of the work valve device 3, so that the drilling work of the fluid pipe 1 is completed. At this time, the mounting position of the punching machine 7 is close to the fluid pipe 1, and the punching machine 7 is used to perform the drilling work by inserting and fitting the inner wall portion 75a of the mounting flange cylinder 71 and the inner peripheral surface 5h of the neck portion 5d. Positioning is concentric with respect to the housing 5 as much as possible, and even if the parallelism of the mounting flange of the punching machine 7 main body and the connection surface of the mounting flange cylinder 71 deviates, the effect on the perforated portion is minimized and the perforation deviation occurs. It is suppressed.

Next, with the inside of the housing 5 sealed in a sealed manner by the work valve body 31 of the work valve device 3, the punching machine 7 is removed, and the open end portion 5c of the neck portion 5d is replaced with the punching machine 7. , A discharger 8 for discharging chips generated during drilling is connected.

As shown in FIG. 8, the ejector 8 has a mounting flange cylinder 81 fixedly attached to the open end portion 5c of the neck portion 5d, a short cylinder 82 connected to the upper end of the mounting flange cylinder 81, and the short cylinder. A flexible cylinder 83 made of an elastic member connected to 82, an operation cylinder 84 connected to the upper end of the flexible cylinder 83, and a discharge pipe 85 sealedly inserted into these cylinders 81, 82, 83 and 84. , Is mainly composed of. The rear end side of the discharge pipe 85 is projected to the outside of the operation cylinder 84, and an on-off valve (not shown) for opening and closing the inside of the discharge pipe 85 is connected.

The connection mode between the mounting flange cylinder 81 of the discharger 8 and the open end portion 5c of the neck portion 5d is the same as the connection mode between the mounting flange cylinder 71 of the drilling machine 7 and the open end portion 5c of the neck portion 5d. Therefore, the description thereof will be omitted.

Next, the process of discharging chips by the discharger 8 will be described. By opening the on-off valve (not shown) connected to the rear end side of the discharge pipe 85, the inside of the fluid pipe 1 and the housing 5 can be opened. Chips can be discharged with the fluid. At this time, by grasping the operation cylinder 84 that coaxially fits the discharge pipe 85 and using the elastic deformation of the flexible cylinder 83 to freely incline with respect to the mounting flange cylinder 81, the tip of the discharge pipe 85 is sucked. Since the mouth 85a can be moved to a desired position in the housing 5, substantially the entire amount can be discharged even if chips are scattered in every corner of the fluid pipe 1 and the housing 5.

Next, with the inside of the housing 5 closed by the work valve body 31 of the work valve device 3, the discharger 8 is removed, and instead of the discharger 8, the open end 5c of the neck 5d is filled with the fluid in the pipe. The control valve 10 for controlling the control valve 10 is connected.

Prior to the installation of the flow control valve 10, as shown in FIGS. 9 and 10, first, as an insertion means for inserting the flow control valve 10 into the housing 5 into the support portions 36, 36 of the work valve device 3. , A pair of hydraulic rods 60 are erected in the vertical direction. The hydraulic rod 60 has a support plate 61 connected to the support portion 36 of the work valve device 3, a cylinder 62 having an inner air structure fixedly supported by the support plate 61, and one end fitted into the cylinder 62. It is mainly composed of a cylinder 63. The hydraulic rod 60 supplies a hydraulic fluid such as oil to the inside of the cylinder 62 via a hydraulic fluid hose (not shown) connected to the supply ports 62a and 62a by a supply pump or the like, and the piston is driven by the hydraulic pressure. It can be expanded and contracted while pressing 63 up and down. Further, the pair of hydraulic rods 60 and 60 are configured so that the pistons 63 and 63 expand and contract synchronously, and the upper ends thereof are always arranged at the same position.

As shown in FIG. 11, the flow control valve 10 has a plug 11 (valve body) that passes through the perforated hole 1b of the fluid pipe 1 and moves up and down so as to open and close the inside of the pipe, and the plug 11 moves up and down. It is mainly composed of a valve housing 12 having a peripheral side portion 13 that is movable in the direction and has an open lower end. The valve housing 12 includes a shaft member 14 extending in the vertical direction in a state in which the valve housing 12 is pivotally supported so as to be rotatable and unable to move forward and backward. By rotating the operation portion 14a at the upper end of the shaft member 14 projecting outward from the body 12, the plug 11 can move up and down with respect to the valve housing 12.

More specifically, the plug 11 includes a female screw piece 11a having a female screw screwed into the shaft member 14, a core portion 11b that engages with the female screw piece 11a and operates following the female screw piece 11a, and the entire core portion 11b. It is mainly composed of a plug portion 11c made of an elastic material coated over the outer surface. The plug 11 moves into the pipe through the hole 1b of the lower fluid pipe 1 by the rotation of the shaft member 14 described above, and the plug 11c covers the entire circumference of the hole 1b and the inner peripheral surface 1c of the fluid pipe 1. The flow rate can be controlled by completely blocking the flow path in the pipe or partially blocking the flow path in the pipe according to the amount of movement of the plug portion 11c. The plug portion 11c is not limited to the one coated on the core portion 11b, may be removable, and may be provided only in a portion necessary for blocking the flow path in the pipe.

Further, the valve housing 12 of the flow control valve 10 is formed with an air vent hole 13a having a female screw portion on the upper end side thereof, which penetrates the peripheral side portion 13 sideways and in which the opening / closing plug 15 in a normally closed state is screwed. At the same time, two recesses 13b and 13b extending over the entire circumference are formed on the outer peripheral surface on the lower end side of the peripheral side portion 13 so as to be vertically separated from each other, and sealing members 21 and 22 are provided in the respective recesses 13b. .. Hereinafter, the lower end side (tip side) of the valve housing 12 will be referred to as a first sealing member 21, and the upper side (base end side) of the first sealing member 21 will be referred to as a second sealing member 22. ..

As shown in FIG. 12A, the first sealing member 21 and the second sealing member 22 of this embodiment are each made of an elastic material integrally formed in an annular shape and have the same shape. The first sealing member 21 is connected to the holding portion 21a on the base end side held between the bulging portion 13c formed on the bottom surface of the recess 13b and the inner wall of the recess 13b, and the holding portion 21a to cause elastic deformation. These sealing members 21 and 22 are composed of an allowable deformed portion 21b, and in the natural state before the elastic deformation, the outermost diameter of the deformed portion 21b is formed to be larger than the inner diameter of the neck portion 5d. There is. Further, the deformed portion 21b of the present embodiment is formed in a concave shape over the bulging portion 21c that bulges in the inner and outer radial directions, the protruding portion 21d that protrudes in the tip direction, and the bulging portion 21c and the protruding portion 21d. It has a concave portion 21e. Since the second sealing member 22 has the same shape as the first sealing member 21 described above, the description thereof will be omitted.

Further, the vertical separation distance between the first sealing member 21 and the second sealing member 22 is configured to be larger than the vertical opening width of the opening 5b of the neck portion 5d.

Next, the step of installing the flow control valve 10 will be described. As shown in FIGS. 11 and 13, the pistons 63 and 63 of the hydraulic rod 60 are extended and the control valve 10 is pressed against the upper ends thereof. The pressing member 64 for the purpose is erected and fastened with the nut 65. Further, the upper end peripheral edge of the valve housing 12 of the flow control valve 10 is fitted to the fitting portion 64a formed through the pressing member 64 substantially in the center, and the pistons 63 and 63 are moved downward by hydraulic pressure. By operating, a pressing force is applied downward to the flow control valve 10 through the pressing surface 64b which is the bottom surface of the pressing member 64, and the flow control valve 10 is gradually moved downward in the neck portion 5d.

As shown in FIG. 14, the flow control valve 10 inserted into the neck portion 5d by the hydraulic rod 60 has at least the sealing member 21 in close contact with the inner peripheral surface 5h above the opening 5b of the neck portion 5d. The sealed state is maintained. In this sealed state, the work valve body 31 of the work valve device 3 is opened. At this time, the on-off valve 32f of the work valve device 3 and the ball valve attached to the female screw hole 5p of the housing 5 are connected by a hose to have the same pressure, and the work valve body 31 is opened to open the work valve body. The resistance to 31 may be reduced. At this time, the lower part of the neck portion 5d is the liquid of the pressure inside the pipe, with the close portion where the first sealing member 21 arranged on the lower side is in close contact with the inner peripheral surface 5j below the opening 5b of the neck portion 5d as a boundary. Since the air is filled with the fluid in the pipe and has an atmospheric pressure smaller than the pressure in the pipe above, a predetermined pressure difference is generated. That is, the inner peripheral surface 5j below the opening 5b of the neck portion 5d functions as a valve seat for sealing the flow control valve 10. At this time, when the hydraulic rod 60 moves downward, the plug 11 does not come into contact with the work valve body 31 and must be stopped at a position where the sealing member 21 seals the spacer. For example, the spacer is pressed between the pressing member 64 and the work valve device. It may be provided between 3 and 3 to manage movement restrictions.

In this embodiment, since the neck portion 5d of the fluid pipe 1 and the housing 5 externally fitted therein is formed to have a small diameter, the force acting upward on the flow control valve 10 is relatively small, and is above this. The check valve 10 can be further pressed downward by the hydraulic rod 60 against the acting force.

When the flow control valve 10 moves downward, when the first sealing member 21 that has sealed the inner peripheral surface 5h of the neck portion 5d passes through the opening 5b, it is temporarily separated from the inner peripheral surface 5h of the neck portion 5d. At this time, the upper second sealing member 22 seals the inner peripheral surface 5h of the neck portion 5d, although the sealed state cannot be maintained. That is, the first sealing member 21 and the second sealing member 22 that are vertically separated from each other keep the sealed state at all times until the flow control valve 10 is installed, and can prevent fluid leakage.

Further, the inner peripheral surface 5h above the opening 5b of the neck portion 5d and the inner peripheral surface 5j below the opening 5b are formed linearly in the vertical direction, which is the insertion direction of the valve housing 12. By doing so, not only is it easy to insert the valve housing 12, but also the sealed state of the sealing members 21 and 22 in contact with the inner peripheral surfaces 5h and 5j can be stabilized.

According to the above-mentioned cross-sectional shape of the sealing members 21 and 22 of this embodiment, the surface of the concave portion 21e formed in a concave shape over the bulging portion 21c and the protruding portion 21d that bulge in the inner and outer radial directions is formed on the surface of the concave portion 21e. By acting the pressure of the fluid in the pipe, it is possible to obtain a lip sealing effect in which the bulging portion 21c is brought into close contact with the inner peripheral surface 5h, 5j of the neck portion 5d and the recess 13b of the peripheral side portion 13, and the sealing property can be improved. At the same time, the insertion resistance of the flow control valve 10 is reduced.

As shown in FIG. 15, in the flow control valve 10, the first sealing member 21 extends below the opening 5b and is in close contact with the inner peripheral surface 5j of the neck portion 5d, and the second sealing member 22 opens. It is pressed to an installation position close to the inner peripheral surface 5h above the portion 5b. At this installation position, the hook portions 13e and 13e extending further downward from the overhanging portion 13d projecting to the outer diameter side of the peripheral side portion 13 of the valve housing 12 are provided at the open end portion 5c of the neck portion 5d of the housing 5. Since it is fitted in the cutout portion 5f as the formed engaging portion and the flow control valve 10 can regulate the movement in the circumferential direction with respect to the housing 5, there is a possibility that the flow control valve 10 will move due to the flow of the fluid in the pipe. It can be avoided.

Next, the flange portion 5e of the open end portion 5c of the housing 5 and the overhanging portion 13d of the flow control valve 10 superposed on the flange portion 5e are formed by a fitting member 19 having a divided structure formed in a substantially U-shape in cross section. By fitting, the check valve 10 is restricted from coming out of the housing 5 in the upward direction.

Further, at the installation position of the flow control valve 10, the opening / closing plug 15 is screwed out to open the air vent hole 13a, so that the air remaining in the valve housing 12 of the flow control valve 10 in the sealed state is released to the outside. discharge. More specifically, the opening / closing plug 15 has a male screw member 15a on which a communication passage 15c is formed so as to span the peripheral surface on the base end side from the tip thereof, and an outer surface of the valve housing 12 provided on the washer portion of the male screw member 15a. It is composed of an O-ring 15b for sealing the screw. When the opening / closing plug 15 is slightly screwed out, the air in the valve housing 12 is discharged to the outside through the communication passage 15c and the gap between the O-ring 15b and the outer surface of the valve housing 12. Here, the air vent hole 13a is formed near the upper end of the valve housing 12, and substantially the entire amount of the air inside the valve housing 12 can be discharged to the outside, so that the air inside the valve housing 12 is compressed. Not only can it avoid the possibility of causing an unexpected accident, but also the corrosion of the valve housing 12 can be suppressed. The air may be released at any time, for example, during the insertion of the flow control valve 10, or the sealing member 21 seals the open end portion 5c of the housing 5, and the opening / closing valve 32f and the female screw of the housing 5 are released. It may be performed when the ball valve attached to the hole 5p is connected with a hose and filled with water.

After installing the flow control valve 10 as described above, as shown in FIGS. 16 to 18, the pressing member 64 and the hydraulic rod 60 assembled to the flow control valve 10 are removed, and further, the housing 5 The work valve device 3 attached to the opening 5b is sequentially removed. At this time, since the first sealing member 21 seals the inner peripheral surface 5j below the opening 5b of the neck portion 5d, leakage of the internal fluid is prevented even if the opening 5b is opened. Therefore, the work valve device 3 can be removed without sealing with the plug 11, and there is no risk of the work valve device 3 becoming deteriorated. As shown in FIGS. 16 and 17, the closing lid 9 is hermetically attached to the opening 5b after the work valve device 3 is removed.

As described above, according to the fluid control device according to the present invention, the work valve device 3 is attached by having an opening 5b for attaching / detaching the work valve device 3 to the neck portion 5d of the housing 5. Since the position can be brought closer to the fluid pipe 1, the drilling stroke can be shortened, the displacement of the drilling position can be minimized, and at the same time, the construction equipment such as the work valve device 3 and the drilling machine 7 can be made smaller, lighter, and more costly. Achieve down. Further, the tip of the valve housing 12 has a neck portion due to the annular first sealing member 21 provided between the valve housing 12 of the flow control valve 10 and the peripheral surface on the fluid pipe 1 side of the opening 5b of the neck portion 5d. Since the sealed state can be made at a position beyond the opening 5b of 5d, the opening 5b and the open end 5c can be shut off at the same time in this sealed state. Therefore, the fulcrum when the plug 11 of the flow control valve 10 is inserted into the hole 1b of the fluid pipe 1 is ensured, the stroke length is reduced, the position accuracy of the plug 11 is improved, and the fluid in the pipe is controlled. You can improve your sex.

Although examples of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these examples, and any changes or additions within the scope of the gist of the present invention are included in the present invention. Is done.

For example, in the above embodiment, the hydraulic rod 60 is configured as an insertion means for inserting the flow control valve 10 into the housing 5, but the present invention is not limited to this, and for example, as shown in FIG. 19, a pair. The screw type insertion machine 69 may be configured. The screw type insertion machine 69 sandwiches a support plate 91 connected to the support portion 36 of the work valve device 3, a male screw rod 92 fixedly supported by the support plate 91, and a pressing member 94 inserted through the male screw rod 92. It is mainly composed of a female screw member 93 to be screwed together. The screw type insertion machine 69 applies a pressing force downward to the flow control valve 10 through the pressing surface 94b, which is the bottom surface of the pressing member 94, by screwing these female screw members 93 downward. The flow valve 10 is gradually moved downward in the neck portion 5d.

Further, for example, in the above embodiment, the deformed portion 21b that allows elastic deformation of the first sealing member 21 and the second sealing member 22 has a bulging portion 21c that bulges in the inner and outer radial directions and a bulging portion 21c in the tip direction. It has a protruding portion 21d and a concave portion 21e formed in a concave shape over the protruding portion 21d, but the present invention is not limited to this, and for example, FIG. 12B shows a modification 1 of the sealing member according to the present invention. As shown in the above, the deformed portion 23b of the sealing member 23 may be formed in a substantially spherical cross-sectional shape that smoothly bulges in the inner and outer radial directions and the tip direction. Since the 23b receives the pressure of the fluid evenly on substantially the entire outer surface thereof and elastically deforms into a gentle curved surface having a large radius of curvature, a wide sealing surface with the inner peripheral surface of the neck can be obtained.

Alternatively, as a modification 2 of the sealing member according to the present invention, as shown in FIG. 12C, the deformed portion 24b of the sealing member 24 is formed in a substantially circular shape in cross section having a notch portion 24e on the outer peripheral portion thereof. By doing so, it is possible to take a large amount of elastic deformation allowance in the outer diameter direction, so that the sealing function between the deformed portion 24b after elastic deformation and the inner peripheral surface of the neck portion can be enhanced. In addition, the first sealing member 21 and the second sealing member 22 may have different cross-sectional shapes.

Further, for example, in the above embodiment, an air vent hole 13a for venting air is formed so as to laterally penetrate the peripheral side portion 13 of the valve housing 12 of the flow control valve 10, but the valve casing is not limited to this, for example. A continuous passage for air bleeding that penetrates upward is formed around the shaft member 14 that penetrates the body 12, and a fixing member that keeps this continuous passage in a closed state is attached, and the fixing member is removed or removed when bleeding air. By loosening, air may be evacuated through the communication passage, or the shaft member 14 may be pulled out in the axial direction so as to temporarily release the seal of the shaft member 14 to bleed air.

Further, for example, in the above embodiment, the flow control valve 10 includes, as its valve body, a plug 11 that passes through the hole 1b of the fluid pipe 1 and is in close contact with the inner peripheral surface 1c. Any form of valve body can be applied as long as the fluid in the pipe can be controlled.

Further, for example, in the above embodiment, the hydraulic rod 60 is installed in the work valve device 3, but the present invention is not limited to this, and the existing fluid pipe 1 or the housing 5 may be used for installation.

Further, for example, in the above embodiment, the hole saw 72a having a diameter smaller than that of the fluid pipe 1 is used for drilling, but the present invention is not limited to this, and the inside of the housing 5 is formed by a hole saw or a bite device having a diameter larger than that of the fluid pipe 1, a wire saw device, or the like. A part of the fluid pipe is cut, the section is removed, and a plug that seals the inner peripheral surface of the housing as a valve seat and a flow control valve that has an inner valve box with a built-in valve body are installed in a continuous flow state. You may try to do it.

Further, for example, in the above embodiment, the fluid pipe 1 is drilled with a hole saw 72a, but the present invention is not limited to this, for cutting the fluid pipe with a cutting tool such as an end mill and inserting a plug into the fluid pipe. A hole may be formed. At this time, as a cutting method in the uninterrupted state, for example, the end mill provided in the housing is rotated, the fluid pipe is perforated, and then the end mill together with the housing is rotated in the circumferential direction of the fluid pipe in the uninterrupted state. The hole may be formed, or the end mill may be moved together with the housing in the axial direction of the fluid pipe to form the hole. Further, a hole may be formed in the fluid pipe by fixing the housing to the fluid pipe and moving the end mill relative to the housing and the fluid pipe in a rotating state.

1 Fluid pipe 1b Hole 1c Inner peripheral surface 3 Work valve device 5 Housing 5b Opening 5c Open end 5d Neck 5f Notch (engagement)
5h Inner peripheral surface 5j Inner peripheral surface 5m Protruding part (positioning part)
7 Drilling machine 8 Discharger 9 Blocking lid 10 Control valve 11 Plug body (valve body)
12 Valve housing 13 Peripheral side 14 Shaft member 15 Opening / closing plug 13a Air vent hole 21 First sealing member 21b Deformed part 21c Protruding part 21e Concave part 22 Second sealing member 23 Sealing member 24 Sealing member 31 Working valve body 32 Accommodating member (work valve housing)
33 Mounting member 34 Shaft member 51 First split body 52 Second split body 60 Hydraulic rod 62 Cylinder 63 Piston 64 Pressing member 69 Screw type inserter 71 Mounting flange cylinder 72 Cutter 73 Advance / retreat mechanism 74 Drive motor 81 Mounting flange cylinder 83 Flexible Cylinder 84 Operation cylinder 85 Discharge pipe

Claims (7)

A flow control valve having a divided structure housing in which the fluid pipe is fitted in a sealed manner, and a valve body and a valve housing that can be inserted into the holes of the fluid pipe that are perforated in the housing in a continuous flow state. A fluid control device that has at least
The housing has a neck portion having an open end portion for installing the flow control valve in the housing and an opening for attaching and detaching a work valve device capable of opening and closing the inside of the housing.
A first sealing member formed in an annular shape is provided between the peripheral surface of the valve housing of the flow control valve and the peripheral surface of the neck portion on the fluid tube side of the opening. A fluid control device characterized by. A second sealing member formed in an annular shape is provided between the peripheral surface of the valve housing of the flow control valve and the peripheral surface of the neck portion on the open end side of the opening. The fluid control device according to claim 1. The fluid control device according to claim 1 or 2, wherein the peripheral surface of the neck portion is formed linearly in the insertion direction of the valve housing. The fluid control device according to any one of claims 1 to 3, wherein the valve housing of the flow control valve is provided with an air vent hole that can be opened and closed at an upper end portion of the valve housing. The fluid control device according to any one of claims 1 to 4, wherein the opening of the neck portion is open in the pipeline direction of the fluid pipe. The fluid control device according to any one of claims 1 to 5, wherein the housing includes an engaging portion that restricts the movement of the flow control valve installed in the housing in the circumferential direction. The fluid control device according to any one of claims 1 to 6, wherein the housing includes a positioning unit for positioning the work valve device attached to the opening.

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