JP6118881B2 - Mounting structure - Google Patents

Description

  The present invention includes a casing that is hermetically attached to a fluid pipe, a case body that is attached in communication with the opening flange portion of the casing, and is provided with a punching unit that drills a hole in the fluid pipe. Consisting of a fixture with a connecting part connected to the case body, a valve housing that has a valve body inside that can close the perforation of the fluid pipe and the inner peripheral surface is permanently installed in the opening flange of the housing. The present invention relates to a mounting structure for installing in a flow state.

  The conventional mounting structure is a structure in which a housing is hermetically attached to a fluid pipe, and a case body communicating with the housing is connected, and a drilling means provided in the case body is used to connect the fluid pipe in the housing. After the perforation is made, a valve housing including a valve body that is inserted into the perforation and closes the inner peripheral surface of the fluid pipe is installed on the housing (see, for example, Patent Document 1).

Japanese Patent No. 4353560 (5th page, Fig. 1)

  However, in Patent Document 1, since it is necessary to connect the case body to the opening flange portion of the housing for installing the valve housing, this opening flange portion is a flange for connecting the valve housing. In addition to the portion, the mounting structure requires a flange portion that is extended to connect the case body, which increases the size of the opening flange portion and may cause damage to the opening flange portion due to a load.

  The present invention has been made paying attention to such a problem, and has an attachment structure that can easily repair a damaged portion even if it is damaged without enlarging the opening flange portion of the housing. The purpose is to provide.

A housing that is attached to the fluid pipe in a sealed manner and has an opening flange, an attachment that is attached to the opening flange, and a case body that is disposed on the attachment; A mounting structure for installing a valve housing having a valve body capable of closing a fluid pipe in an uninterrupted state,
The fixture includes a plurality of divided members that are connected to each other to be attached to the outer peripheral surface of the opening flange portion, and each of the divided members seals the outer peripheral surface of the opening flange portion on the inner peripheral wall thereof. And a connecting portion for connecting the case body to the outer peripheral side of the fixture and at the same height position as the opening flange portion.
According to this feature, the fixture having a connection portion connected to the case body is configured separately from the opening flange portion of the housing, and the fixture is interposed between the opening flange portion and the case body. Since the valve housing can be removed from the opening flange portion of the housing together with the case body after the valve housing is hermetically installed on the opening flange portion of the housing, the connection to the case body is connected to the opening flange portion of the housing itself. Not only can it be reduced in size by simply providing a connection to the valve housing without providing a part, but even if the load is excessively damaged on the connection part of the fixture, it is only necessary to replace the fixture. It can be repaired easily. Furthermore, it is easy to attach a fixture composed of a plurality of divided members to the opening flange portion, and further, the divided members are connected and attached to each other, so that an excessive load is not applied to the attachment portion of the opening flange portion.

The mounting structure of the present invention is
The dividing member is characterized in that each inner peripheral wall abuts on the opening flange portion.
According to this feature, by attaching the fixture along the opening flange portion, the area excluding the outer peripheral end of the opening flange portion can be secured as an area for installing the valve housing, and the opening flange portion can be secured. The case body can be easily connected using the divided member fitted to the outer peripheral end.

The mounting structure of the present invention is
The fitting is characterized in that it is formed along the non-circular opening flange portion as viewed in the installation direction of the valve housing.
According to this feature, it is possible to position and mount the fixture having a shape along the non-circular opening flange portion without being displaced in the circumferential direction with respect to the opening flange portion.

It is front sectional drawing which shows the state by which the housing | casing was attached to the fluid pipe | tube in an Example. It is side sectional drawing which shows the state by which the housing | casing was attached to the fluid pipe | tube. It is a top view which shows attachment of the fixture to an opening flange part. It is front sectional drawing which shows the drilling | piercing of the fluid pipe | tube by an end mill. It is a sectional side view which shows the drilling | piercing of the fluid pipe | tube by an end mill. It is a front sectional view showing cleaning of a perforation by a brush. It is front sectional drawing which shows the state before the attachment to the opening flange part of a valve housing | casing. It is front sectional drawing which shows the state in which the valve housing was attached to the opening flange part. It is front sectional drawing which shows the state by which the communicating port of the branch pipe was obstruct | occluded. It is front sectional drawing which shows the state which the valve body has open | released the flow path. It is a sectional side view which shows the state which the valve body has open | released the flow path. It is a sectional side view which shows the state which the valve body has obstruct | occluded the flow path. It is a sectional side view which shows the state which the valve body has obstruct | occluded the flow path. It is a sectional side view which shows the state by which the housing | casing was attached to the fluid pipe | tube in a modification. It is a top view which shows the fixture attached to the opening flange part in a modification. It is a sectional side view which shows the state in which the valve body in a modification was installed in the housing | casing.

  EMBODIMENT OF THE INVENTION The form for implementing the attachment structure based on this invention is demonstrated below based on an Example.

  The mounting structure according to the embodiment will be described with reference to FIGS. As shown in FIG. 1, the fluid pipe 1 of the present embodiment is a metal pipe such as ductile cast iron, other cast iron, steel, etc., for water supply buried in the ground, and is formed in a substantially circular shape in cross section. The inner peripheral surface is covered with the mortar layer 1b. The fluid pipe according to the present invention may be made of vinyl chloride, polyethylene or polyolefin. Furthermore, in the present embodiment, the fluid in the fluid pipe 1 is clean water, but the fluid flowing in the fluid pipe is not necessarily limited to clean water. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas It may be a gas-liquid mixture of liquid and liquid.

  In this embodiment, as shown in FIGS. 10 and 12, the valve housing 13 having the valve body 14 is installed in the fluid pipe 1 configured as described above, and the fluid is obtained by operating the valve body 14. The flow path of the fluid in the pipe 1 is blocked. Hereinafter, in the present embodiment, the installation of the valve housing 13 in the fluid pipe 1 will be described in the order of steps.

  First, as shown in FIGS. 1 and 2, a housing 2 is attached to the outer peripheral surface 1 a of the fluid pipe 1 in a sealed manner. The housing 2 is a so-called split T-shaped tube, which is disposed from above with respect to the fluid pipe 1, and covers a first case 3 that covers the upper side of the outer periphery of the fluid pipe 1 and the fluid pipe 1 from below. The second case 4 is disposed and covers the lower side of the outer periphery of the fluid pipe 1. The first case 3 and the second case 4 are made of a metal material such as cast iron. Note that the housing may have a divided structure including three or more cases. Furthermore, as long as the material of the housing is applied according to the material of the fluid pipe to which the housing is attached, various materials may be used similarly to the fluid pipe described above.

  Among these, the first case 3 is configured to abut on the outer peripheral surface 1a of the fluid pipe 1 at a part of the inner wall, and at the substantially central portion of the fluid pipe 1 of the first case 3 in the tube axis direction, A branch port 3a is formed toward the head. The branch port 3a is formed in a non-circular shape in which the width dimension facing the radial direction of the fluid pipe 1 in plan view is longer than the width dimension facing the pipe axis direction of the fluid pipe 1. At the upper end portion, similarly to the branch port 3a, the non-circular opening flange portion 3b whose width dimension facing the radial direction of the fluid pipe 1 in plan view is longer than the width dimension facing the pipe axis direction of the fluid pipe 1 Is formed.

  The opening flange portion 3b is formed with a plurality of bolt holes 3d at equal intervals along the circumferential direction of the opening flange portion 3b. These bolt holes 3d are working bolts 6 provided with a sealing member. It is blocked by

  In addition, a pair of flanges 3 c and 3 c that face in the outer diameter direction of the fluid pipe 1 are formed so as to protrude from both circumferential ends of the fluid pipe 1 in the first case 3. Furthermore, a communication port 3 e is formed through the branch port 3 a so as to extend outward from the first case 3. A communication valve 7 is sealed from the outside of the first case 3 to the communication port 3e. The communication valve 7 includes a valve body 7a that can be communicated between the inside and the outside of the first case 3 through the communication port 3e when operated by an operator.

  In addition, the seal | sticker which closely_contact | adheres to the outer peripheral surface 1a of the fluid pipe | tube 1 is arrange | positioned in the inner wall of the both ends in the pipe-axis direction of the fluid pipe | tube 1 of the 1st case 3 from the upper side. The member 3f is disposed over the entire length of the first case 3 in the circumferential direction.

  On the other hand, the second case 4 is formed to have a dimension in the tube axis direction of the fluid pipe 1 that is substantially the same as that of the first case 3, and comes into contact with the outer peripheral surface 1 a of the fluid pipe 1 on the inner wall. Further, a pair of flanges 4 c and 4 c that are opposed to the outer diameter direction of the fluid pipe 1 are formed so as to protrude from both ends of the second case 4 on the circumferential direction side of the fluid pipe 1. The flanges 4c and 4c have substantially the entire length of the fluid pipe 1 of the second case 4 inside the flanges 4c and 4c. Since the case 4 is disposed on the fluid pipe 1 from below, a seal member 4f that is in close contact with the outer peripheral surface 1a of the fluid pipe 1 is disposed.

  The first case 3 and the second case 4 configured as described above have the flanges 3c and 4c fastened with bolts and nuts, so that the seal member 3f is formed between the outer peripheral surface 1a of the fluid pipe 1 and the first case 3. The inner wall and the seal member 4f are in close contact with the outer peripheral surface 1a of the fluid pipe 1 and the inner wall of the second case, respectively, and the seal member 4f is located on the inner side of the flanges 3c and 4c of the first case 3 and the second case 4. The first case 3 and the second case 4 are in close contact with each other over substantially the entire length of the fluid pipe 1 in the pipe axis direction. Furthermore, the casing 2 is attached to the fluid pipe 1 in a sealed manner by having both end portions on the circumferential direction side of the fluid pipe 1 of the seal member 3f in close contact with both ends on the circumferential side of the fluid pipe 1 of the seal member 4f. .

  The opening flange portion 3b of the casing 2 attached to the fluid pipe 1 in a sealed manner has a width dimension that faces the radial direction of the fluid pipe 1 in plan view so as to follow the shape of the opening flange portion 3b. A fixture 5 is formed which is formed in a non-circular shape longer than the width dimension facing the tube axis direction, and whose vertical width dimension is longer than the opening flange portion 3b. As shown in FIGS. 1 and 3, the fixture 5 is divided into a pair of divided members 5 a and 5 a that are arranged to face the opening flange portion 3 b from the horizontal direction. In addition, although the fixture 5 of a present Example is comprised by 2 division as mentioned above, the fixture 5 may be comprised by the multiple division structure of 3 or more divisions.

  Each divided member 5a is formed in a substantially arc shape in a plan view, and flanges 5b and 5b are formed at both ends in the circumferential direction. Each divided member 5a is formed with a plurality of through-holes 5c facing the up and down direction as connecting portions in the present invention along the circumferential direction of the divided member 5a.

  On the inner peripheral wall of each divided member 5a, a concave portion 5d having a vertical width dimension substantially the same as the vertical width dimension of the opening flange portion 3b is formed over the entire length in the circumferential direction. Seal members 5e and 5e that are in close contact with the outer peripheral surface of the flange portion 3b are disposed over the entire length in the circumferential direction of the recess 5d. Further, a seal member 5f is disposed over the entire length in the circumferential direction of the inner wall above the recess 5d in the inner wall of the dividing member 5a.

  By disposing the divided members 5a and 5a thus configured from the horizontal direction with respect to the opening flange portion 3b, the opening flange portion 3b is fitted into the recess 5d, and the opposed flanges 5b and 5b are bolted. -Fastening with a nut attaches the fixture 5 to the opening flange portion 3b so that it cannot move.

  At the same time, the outer peripheral surface of the opening flange portion 3b and the fixture 5 are elastically deformed between the outer peripheral surface of the opening flange portion 3b and the recess 5d by the seal members 5e and 5e disposed in the recess 5d. It adheres over the whole circumference of a horizontal direction, and the attachment to the opening flange part 3b of the fixture 5 is complete | finished. In addition, since the fixture 5 is attached to the opening flange portion 3b by using the flanges 5b and 5b for the split members 5a and 5a by using bolts and nuts, the bolt and nut can be removed from the flanges 5b and 5b. It can be easily removed from the opening flange portion 3b.

  Next, as shown in FIGS. 4 and 5, the case body 8 in which the work valve 8 a and the cutting device 9 are disposed is disposed from above the fixture 5. At this time, the lower end portion of the case body 8 is formed with a flange portion 8b that is inserted inward of the fixture 5. When the flange portion 8b is inserted along the inner peripheral surface of the fixture 5, The outer peripheral surface of the portion 8b is in close contact with the seal members 5f and 5f over the entire circumference. Thereby, the case body 8 can be easily temporarily fixed to the fixture 5, and in this state, the case body 8 is screwed into the case body 8 through the through hole 5 c of the fixture 5. It is attached and fixed in a sealed manner to the fixture 5.

  The cutting device 9 will be described in detail. The cutting device 9 includes a cutting case 9d formed so as to penetrate in the vertical direction and having a lower end attached to the upper end of the case body 8 in a watertight manner, and a crossing of the fluid pipe 1 at the upper end of the cutting case 9d. The rail 9e provided horizontally in the direction, the slide base 9f that can slide on the rail 9e while sealing the upper end of the cutting case 9d, and the upper end pivotally supported by the slide base 9f. (Not shown), a shaft member 9a which is connected to a driving means (not shown) provided at the upper end of the slide base 9f and which advances in the axial direction from the cutting case 9d toward the fluid pipe 1 in the branch port 3a, The end mill 9b as the drilling means in the present invention connected to the lower end of the member 9a and the shaft member 9a and the end mill 9b traversing the fluid pipe 1 by operating from the outside of the cutting device 9. A handling portion 9c which can move horizontally, and is mainly comprised. Of these, the end mill 9b is a perforated shaft having a cylindrical shape and provided with cutting blades on the bottom and side surfaces thereof, and is rotated around the shaft member 9a by the driving means. Can be cut.

  The cutting device 9 configured in this way is configured to advance the end mill 9b toward the fluid pipe 1 in the axial direction of the shaft member 9a via the shaft member 9a, thereby cutting the cutting blade at the bottom of the end mill 9b in the housing 2. Thus, a part of the upper end portion of the fluid pipe 1 is cut. At the time of this cutting, the swarf generated at the time of cutting is discharged out of the housing 2 by opening the valve body 7 a of the communication valve 7.

  Then, after the upper end of the fluid pipe 1 is cut by a predetermined amount with the cutting blade at the bottom of the end mill 9b and penetrated, the operator operates the handling part 9c so that the slide base 9f is moved along the rail 9e to the fluid pipe 1 Move horizontally in the cross direction. By the slide movement of the slide base 9f, the end mill 9b is maintained in the height position and horizontally moved so as to cross the fluid pipe 1 with the width dimension of the branch port 3a as a limit, and the fluid is cut by the cutting blade on the side surface of the end mill 9b. The tube 1 is cut. As described above, after the end mill 9b is advanced in the axial direction of the shaft member 9a toward the fluid pipe 1 through the shaft member 9a, the fluid pipe 1 is moved by the handling portion 9c while maintaining the height position of the end mill 9b. By horizontally moving so as to cross, a perforation 1c (see FIG. 6) in which the width dimension in the pipe radial direction is longer than the width dimension in the pipe axis direction is formed in the upper part of the fluid pipe 1. A horizontal surface is formed on the perforated surface 1d by the end mill 9b.

  After the perforation 1c is formed by the end mill 9b as described above, the shaft member 9a and the end mill 9b are retracted from the inside of the housing 2, and the work valve 8a is operated to temporarily seal the branch port 3a. Then, as shown in FIG. 6, instead of the end mill 9b, the shaft member 9a is provided with a substantially cylindrical brush 9d having the same diameter as the end mill 9b as cleaning means in the present invention, and the work valve 8a is operated. After the branch port 3a is opened, the shaft member 9a and the brush 9d are advanced toward the perforation 1c. The brush 9d is horizontally moved in the radial direction of the fluid pipe 1 by the operation of the handling portion 9c while being rotated by the driving means, so that foreign matters such as chips adhering to the perforation surface 1d and the peripheral portion of the perforation 1c are obtained. Is removed, and the perforated surface 1d and the peripheral edge are cleaned. In particular, impurities such as chips that are relatively easy to deposit on the horizontal surface formed on the perforated surface 1d as described above can be reliably removed by the brush 9d.

  After removing the contaminants from the perforations 1c by the brush 9d, the shaft member 9a and the brush 9d are retracted from the inside of the housing 2, and the work valve 8a is operated to temporarily seal the branch port 3a. And while removing the cutting device 9 from the upper end part of the case body 8, as shown in FIG. 7, the outer cover 10 is connected to the upper end part of the case body 8 in the sealing form. The outer cover 10 includes a pair of openings 10a and 10a facing sideways, and these openings 10a and 10a are closed in a sealed manner by lids 11 and 11.

  One of the lids 11, 11 is formed with a communication port 11 a that penetrates the lid 11 in order to connect a communication member 17 described later. A communication valve 12 is sealed from the outside of the outer cover 10 to the communication port 11a. The communication valve 12 includes a valve body 12a that can be communicated between the inside and outside of the outer cover 10 through the communication port 11a when operated by an operator.

  From an upper end (not shown) of the outer cover 10, an arm (not shown) is attached so as to be movable up and down. At the lower end of the arm, a valve housing 13 in which a valve body 14 for shutting off or opening the conduit of the fluid pipe 1 in advance through the perforation 1c is disposed via the intermediate member 15 in advance. The valve housing 13 is disposed in the outer cover 10 when the arm is attached to the upper end of the outer cover 10. The valve housing 13 is opened downward, and a rust prevention member 16 made of an elastic body such as rubber is attached to the lower end portion of the valve housing 13 in a curved surface substantially the same as the perforation 1c. ing.

  A communication port 13 a that communicates with the inside and outside of the valve housing 13 is formed on the side of the valve housing 13. A space between the arm and the upper end portion of the outer cover 10 is hermetically held by a rubber body (not shown). Furthermore, the intermediate member 15 is formed in a cylindrical shape, and a rotation operation portion 13b described later is inserted and disposed therein (see FIG. 10).

  After sealing the outer cover 10 to the upper end portion of the case body 8, one end side of the communication member 17 such as a hose or a bypass pipe is connected to the communication valve 7 connected to the communication port 3 e on the branch port 3 a side. At the same time, the other end side of the communication member 17 is connected to the communication valve 12 connected to the communication port 11 a of the lid 11. Then, an air valve (not shown) provided at the upper end portion of the outer cover 10 is opened, and the working valve 8a is operated to open the branch port 3a, whereby the inside of the outer cover 10 and the branch port 3a are connected to the fluid pipe. Fill with fluid in 1. At this time, the air in the valve housing 13 is discharged from the air valve through the communication port 13a, so that the fluid in the fluid pipe 1 is filled in the same manner as in the outer cover 10 and the branch port 3a.

  Subsequently, the air valve is closed, the valve bodies 7a and 12a provided in the communication valves 7 and 12 are opened, and the branch port 3a and the outer cover 10 are communicated with each other. 3a is maintained at substantially the same pressure, and the valve housing 13 is pressed in an uninterrupted state by a pressing means (not shown) attached in advance to the outer cover 10, so that the valve housing is placed on the opening flange portion 3b of the branch port 3a. A body 13 is disposed.

  That is, the communication member 17 connected to both the communication valves 7 and 12 functions as a communication path in the present invention. More specifically, since the casing 2 and the outer cover 10 can be made to communicate with each other via the communication valves 7 and 12 and the communication member 17, the pressure can be made substantially the same. The valve casing 13 can be pressed toward the casing 2 without requiring a large pressing force. The valve housing 13 is disposed on the opening flange portion 3b of the branch port 3a by the pressing means, and the rust preventive member 16 provided at the lower end portion of the valve housing 13 extends over the entire circumference of the drilling surface 1d of the drilling 1c. Abut. In particular, since the valve housing 13 can be stably disposed on the horizontal surface formed on the above-described perforated surface 1d, the antirust member 16 between the valve housing 13 and the perforated surface 1d can be held.

  In this state, as shown in FIG. 8, the work bolt 6 is removed from the bolt hole 3d of the opening flange portion 3b, and the fixing bolt 18 is screwed into each bolt hole 3d in place of the work bolt 6. The valve housing 13 and the opening flange portion 3b are tightened by screwing of the bolt, whereby the rust preventive member 16 is elastically deformed between the valve housing 13 and the perforated surface 1d of the perforated 1c and the valve housing. 13 and the perforation surface 1d of the perforation 1c, and the valve housing 13 is attached to the opening flange portion 3b in a sealing manner.

  In addition, since the inside of the branch port 3a and the inside of the outer cover 10 are filled with the fluid in the fluid pipe 1 and become substantially the same pressure, the fluid in the fluid pipe 1 is attached when the valve housing 13 is attached to the opening flange portion 3b. Therefore, the drag received by the valve housing 13 can be reduced. After the valve housing 13 is attached to the opening flange portion 3b, the valve body 12a of the communication valve 12 is closed and the communication member 17 is removed from the communication valves 7 and 12 as shown in FIG.

  Then, the communication port 3e is sealed by the closure bolt 19 by screwing the closure bolt 19 into the communication port 3e from the outside of the housing 2 through the communication valve 7, and as shown in FIG. Remove the communication valve 7 from. Further, the lids 11 and 11 are removed from the outer cover 10, and the intermediate member 15 is separated from the valve housing 13 through the openings 10a and 10a. Furthermore, by removing the bolt from the case body 8 and the fixture 5, the case body 8 is removed from the fixture 5, and the fixture 5 itself is also removed from the flanges 5b and 5b of the divided members 5a and 5a. Then, it is removed from the opening flange portion 3b.

  As shown in FIGS. 10 and 11, the valve housing 13 has an outer diameter smaller than the inner diameter of the branch port 3 a, and is provided by an O-ring 13 c provided along the outer periphery of the lower portion of the valve housing 13. It is inserted in a sealed manner along the inner peripheral surface of the branch port 3a.

  The rotating screw 13d is rotatably attached to an insertion hole (not shown) formed in the top of the valve housing 13 so that the upper end protrudes outside the valve housing 13. The pressing plate 13e is fixed to the upper end surface of the valve housing 13 with a bolt, and prevents the rotation screw 13d from being pulled out from the insertion hole. With the above configuration, the rotating screw 13d is rotatable in both forward and reverse directions with respect to the valve housing 13, but does not move up and down. Reference numeral 13f denotes a screw portion having a circumferential surface screwed over substantially the entire length except for the upper end portion of the rotating screw 13d.

  The screw top 13g is fitted into a guide groove 14a formed at the upper end portion of the valve body 14, and is screwed into the screw portion 13f, and the rotation of the rotation operation portion 13b formed at the upper end portion of the rotary screw 13d. Accordingly, by rotating the screw portion 13f, the valve element 14 can move up and down following the screw top 13g screwed along the screw portion 13f. The valve body 14 is formed with an insertion hole 14b into which the screw portion 13f of the rotary screw 13d is inserted.

  Thereafter, as shown in FIGS. 12 and 13, the valve body 14 moves downward by the rotation of the rotation operation portion 13 b by a handle (not shown), thereby being elastically deformed on the inner peripheral surface of the fluid pipe 1 and sealingly applied. The conduit of the fluid pipe 1 is cut off, and the fluid pipe 1 is opened by moving upward by the rotation of the rotation operation portion 13b by the handle. When the valve body 14 is elastically deformed so as to block the conduit of the fluid pipe 1, the valve body 14 bulges into the perforation 1c by closely contacting the lower end portion of the valve housing 13 and the peripheral edge of the perforation 1c. By contacting the rust preventive member 16, the conduit of the fluid pipe 1 is more reliably blocked.

  In the present embodiment, the end mill 9b is moved in the horizontal direction by limiting the width dimension of the branch port 3a facing the radial direction of the fluid pipe 1, and the perforation 1c is formed. The present invention is not necessarily limited to this embodiment, and for example, it may be drilled in the circumferential direction of the fluid pipe. Furthermore, the drilling means for drilling the fluid pipe 1 is not limited to the end mill 9b. For example, as shown in FIGS. 14 and 15 as a modification of the present invention, the driving means is connected to the lower end of the shaft member 9a. It may be a substantially cylindrical hole saw 20 that rotates about the shaft member 9a by driving.

  As shown in FIGS. 14 and 15, in the case of this modification, the shape of the branch port 3 a ′ is formed in a substantially circular shape in a plan view through which the hole saw 20 can be inserted. Similarly, the opening flange portion 3b 'and the fixture 5' are formed in a substantially annular shape in plan view so as to follow the shape of the branch port 3a '. In this case, the positioning mark M1 is formed on the peripheral surface of the opening flange portion 3b ′, and the flanges 5b ′ and 5b are formed on the upper surfaces of the flanges 5b ′ and 5b ′ of the divided members 5a ′ and 5a ′ constituting the fixture 5 ′. The positioning mark 2 that is paired with the positioning mark M1 is formed by tightening the '.

  According to this configuration, as shown in FIGS. 15 and 16, when the fixture 5 ′ is attached to the opening flange portion 3b ′, the positioning mark M1 and the positioning mark M2 face each other so that the positioning mark M1 faces the positioning mark M2. The orientation can be adjusted, and the through hole 5c ′, which is a connection portion of the fixture 5 ′ attached to the opening flange portion 3b ′, is adjusted to an accurate position in the circumferential direction with respect to the case body 8. Thus, the hole saw 20 can be advanced toward the fluid pipe 1 through the substantially circular branch port 3a 'to which the fixture 5' is attached, and the fluid pipe 1 can be cut in the casing 2.

  In this embodiment, the valve body 14 is moved up and down between the valve housing 13 and the fluid pipe 1 to shut off and open the conduit of the fluid pipe 1. Instead of the valve body 14 and the valve housing 13 of the embodiment, as shown in FIG. 16, a switching valve 23 including a closing body 22 that rotates horizontally around the rotation shaft 21 may be provided. Good. In this case, the valve body 14 is inserted and disposed between the cut surfaces 1 e of the fluid pipe 1 cut by the hole saw 20 in the housing 2, and the fluid pipe 1 in the housing 2 is closed by the closing body 22 of the switching valve 23. By closing the downstream side, the conduit of the fluid pipe 1 can be blocked.

  Further, as shown in FIG. 16, when the branch portion 2 a connected to the bypass pipe or the like is provided in the housing 2, the closing body 22 is connected to the downstream side of the fluid pipe 1 in the housing 2 and the branch portion 2 a side. It is possible to selectively block the conduit of the fluid pipe 1 and the conduit to the bypass pipe.

  As described above, in the mounting structure of the mounting tool in the present embodiment, the mounting tool 5 is detachably interposed between the opening flange portion 3b of the housing 2 and the case body 8, and is thus connected to the case body 8. The attachment 5 having the connecting portion is configured separately from the opening flange portion 3b of the housing 2, and the attachment 5 is interposed between the opening flange portion 3b and the case body 8, and the case body 8 After the perforation 1c is perforated in the fluid pipe 1 by the perforating means provided in the valve body 13 and the valve housing 13 is installed in a sealed manner on the opening flange portion 3b of the housing 2, the opening flange portion of the housing 2 together with the case body 8 is provided. Since it can be removed from 3b, the opening flange 3b of the housing 2 itself can be reduced in size only by providing a connection portion with the valve housing 13 without providing a connection portion with the case body 8, and the case body. 8, a load is applied to the connecting portion of the fixture 5. Even if damage takes excessive, it can easily be repaired only by replacing such the fixture.

  Further, since the fixture 5 is composed of a plurality of divided members 5a that are attached to the opening flange portion 3b by being connected to each other, the fixture 5 consisting of the plurality of divided members 5a can be easily attached to the opening flange portion 3b. Since the divided members 5a are connected and attached to each other, an excessive load is not applied to the attachment location of the opening flange portion 3b.

  Moreover, since the fixture 5 is attached along the outer periphery end part of the opening flange part 3b, the outer periphery end of the opening flange part 3b is attached by attaching the fixture 5 along the outer periphery end part of the opening flange part 3b. An area excluding the portion can be secured as an area for installing the valve housing 13, and a load generated when drilling by the end mill 9 b can be dispersed in the circumferential direction of the fixture 5.

  Moreover, since the fixture 5 is formed along the non-circular opening flange portion 3b in the installation direction view of the valve housing 13, the fixture 5 having a shape along the non-circular opening flange portion 3b is used. And it can position and attach to the opening flange part 3b without shifting in the circumferential direction.

  Further, since the drilling means is an end mill 9b composed of a drilling shaft that rotates about an axis and moves in a predetermined direction, the drilling shaft of the end mill 9b rotates about the axis and moves in a predetermined direction, thereby moving the case body. 8, loads are applied in various directions, but the connection portion is provided with a detachable fixture 5 that is separate from the housing 2 and can be replaced, and the load is directly applied to the opening flange portion 3 b. Therefore, it is easy to apply the end mill 9b as the drilling means.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the valve body 14 moves downward by the rotation of the rotation operation unit 13b by a handle (not shown), thereby elastically deforming the inner peripheral surface of the fluid pipe 1 and sealingly contacting the fluid pipe 1. The switch body is described as a switching valve that opens the conduit of the fluid pipe 1 by moving upward by the rotation of the rotation operation unit 13b by the handle, but the valve body includes a butterfly valve, a gate valve, a plug It may be an emergency shutoff valve or the like.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 1c Perforation 1d Perforation surface 2 Housing | casing 3a Branching port 3b Opening flange part 4 Second case 5 Attachment 5a Dividing member 5c Through-hole (connection part)
8 Case body 8a Work valve 9 Cutting device 9b End mill (drilling means)
13 Valve housing 14 Valve body 16 Rust preventive member 17 Communication member (communication passage)
20 Hole saw (drilling means)

Claims (3)

A housing that is attached to the fluid pipe in a sealed manner and has an opening flange, an attachment that is attached to the opening flange, and a case body that is disposed on the attachment; A mounting structure for installing a valve housing having a valve body capable of closing a fluid pipe in an uninterrupted state,
The fixture includes a plurality of divided members that are connected to each other to be attached to the outer peripheral surface of the opening flange portion, and each of the divided members seals the outer peripheral surface of the opening flange portion on the inner peripheral wall thereof. And a connecting portion for connecting the case body to the outer peripheral side of the mounting tool and at the same height position as the opening flange portion.   The mounting structure according to claim 1, wherein each of the inner peripheral walls of the split member abuts on the opening flange portion.   The mounting structure according to claim 1 or 2, wherein the mounting tool is formed so as to be along the non-circular opening flange portion as viewed in the installation direction of the valve housing.

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