JP2013119900A - Valve casing installation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve casing installation device boring easily and exactly a bore hole in a fluid pipe and having high versatility in the bore hole shape of a bore hole to be bored.SOLUTION: The valve casing installation device includes a casing 2 mounted to the fluid pipe 1 in a sealed manner, a case body 8 mounted to an opening flange part 3b of the casing 2 in a communication state, and a boring means provided on the case body 8 for boring the bore hole 1c in the fluid pipe 1, wherein a valve casing 13 having a valve element 14 in the inside for closing the bore hole 1c and the inner peripheral surface of the fluid pipe 1 is installed on the opening flange part 3b of the casing 2 in a state of not interrupting a flow. The boring means is an end mill 9b provided on the end of a shaft member 9a rotating axially, and a drive part 9c is provided on the case body 8 for moving parallel the shaft member 9a so that the end of the end mill 9b performs boring while crossing a part of the wall of the fluid pipe 1.

Description

  The present invention relates to a casing that is hermetically attached to a fluid pipe, a case body that is attached to an opening flange portion of the casing in a communicating state, and a drilling means that is provided in the case body and drills a hole in the fluid pipe. The present invention relates to a valve housing installation apparatus that installs a valve housing having a valve body that can close a perforation of a fluid pipe and an inner peripheral surface at an open flange portion of the housing in an uninterrupted state.

  In a conventional valve housing installation device, a sealing tool (valve housing) having a cutting tool (drilling means) and a gate valve (valve element) is attached to an existing pipe, and then the cutting tool is advanced toward the existing pipe. In this state, a cut is made in the existing pipe, and in this state, the sealing case is rotated in the circumferential direction of the existing pipe to form a cutting groove (perforation) in the existing pipe, and the gate valve is inserted into the fluid pipe from the cutting groove. This restricts the flow path in the fluid pipe (see, for example, Patent Document 1).

Japanese Patent No. 3474484 (page 5, FIG. 3)

  However, in Patent Document 1, since the shape of the cutting groove changes according to the rotational distance in the circumferential direction of the existing pipe of the sealed case, it is difficult not to form the cutting groove accurately, Since the shape of the cutting groove is determined only by the rotational distance in the circumferential direction of the existing pipe of the sealed case, there is a problem that the degree of freedom of the shape of the cutting groove is low.

  The present invention has been made by paying attention to such a problem, and is capable of easily and accurately perforating a fluid pipe, while having a high degree of freedom in the perforated shape of the perforated hole. An object is to provide an installation device.

In order to solve the above problems, the valve housing installation device of the present invention is:
A casing that is hermetically attached to the fluid pipe, a case body that is attached in communication with the opening flange portion of the casing, and a punching means that is provided in the case body and drills a hole in the fluid pipe. A valve housing installation device that installs a valve housing having a valve body that can close a perforation of a fluid pipe and an inner peripheral surface in an open flow state in an open flange portion of the housing,
The drilling means is an end mill provided at an end portion of a shaft member that rotates about an axis, and the end portion of the end mill is drilled in the case body across a part of a fluid pipe wall. A drive unit that translates the shaft member is provided.
According to this feature, the drive part provided in the case body translates the shaft member provided with the end mill at the end part, and the end part of the end mill perforates across a part of the fluid pipe wall. Not only can the shaft member be drilled easily and accurately only by parallel movement of the shaft member, but the degree of freedom of the drilling shape that is appropriately formed according to the diameter of the end mill and the drilling depth is increased. In addition, by drilling the fluid pipe wall while moving the end mill in parallel, the drilling position in the drilling depth direction of the end mill that drills the pipe wall gradually changes. Can be distributed without local concentration. Furthermore, it is easy to provide a valve housing on the perforated surface by forming the perforated surface of the fluid pipe facing the end surface of the end mill as a flat surface.

The valve housing installation device of the present invention is
The valve housing is provided with a rust preventive member for preventing the perforated surface of the fluid pipe from being rusted.
According to this feature, even if the fluid pipe is made of metal, the perforated surface where the metal substrate is exposed can be rust-prevented by the rust-preventing member provided in the valve housing.

The valve housing installation device of the present invention is
An attachment tool having a connection portion connected to the case body is detachably interposed between the opening flange portion of the housing and the case body.
According to this feature, 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 installed on the opening flange portion of the housing, the opening flange portion of the housing itself is connected to the case body. Not only can the size be reduced by simply providing a connection with the valve housing without providing a connection, but also when the load on the connection of the fixture is excessively damaged due to drilling of the drilling means provided in the case body Even if there is, it can be easily repaired by simply replacing the fixture.

The valve housing installation device of the present invention is
The opening flange portion of the housing is provided with a dustproof member that prevents dust from entering the attachment portion between the opening flange portion and the valve housing.
According to this feature, the dust-proof member prevents dust from entering the attachment portion between the opening flange portion and the valve housing.

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 front sectional drawing which shows the state in which the dust-proof member was attached in the modification.

  EMBODIMENT OF THE INVENTION The form for implementing the valve housing | casing installation apparatus based on this invention is demonstrated below based on an Example.

  A valve housing installation apparatus according to an 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

  Further, 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 ends on the circumferential side 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 face in the outer diameter direction of the fluid pipe 1 are formed so as to protrude from both end portions on the circumferential direction side of the fluid pipe 1 in the second case 4. Inside the flanges 4c and 4c, substantially the entire length of the fluid pipe 1 of the second case 4 extends over the entire length, and the inner walls at both ends in the tube axis direction of the fluid pipe 1 of the second case 4 are continuously attached to the second wall. 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 are configured such that the seal member 3f is formed between the outer peripheral surface 1a of the fluid pipe 1 and the first case 3 by tightening the flanges 3c and 4c with bolts and nuts. 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 first inside 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 disposed facing 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 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 in 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 concave portion 5d by the seal members 5e and 5e disposed in the concave portion 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 split members 5a and 5a with both flanges 5b and 5b using bolts and nuts, the bolt and nut can be removed from both 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 handling part 9c has a feed screw 9h screwed into a screw hole 9g formed horizontally in the transverse direction of the fluid pipe 1 at the upper end of the cutting case 9d. One end of the feed screw 9h is pivotally supported with respect to the slide base 9f, and the other end is provided with a handle 9i for the operator to rotate the feed screw 9h. . For this reason, the slide base 9f is slidable on the rail 9e together with the feed screw 9h that horizontally moves in the transverse direction of the fluid pipe 1 by the operator turning the handle 9i. That is, the drive part in this invention is comprised by the handling part 9c, the rail 9e, and the slide stand 9f.

  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.

  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 rotates the handle 9i of the handling portion 9c, whereby the slide base 9f is moved by the feed screw 9h. Is horizontally moved in the transverse direction of the fluid pipe 1 along the rail 9e. 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 attached with a substantially cylindrical brush 9j as a cleaning means in the present invention having substantially the same diameter as the end mill 9b, and operates the work valve 8a. After the branch port 3a is opened, the shaft member 9a and the brush 9j are advanced toward the perforation 1c. The brush 9j is rotated by the driving means while being horizontally moved in the radial direction of the fluid pipe 1 by the operation of the handling portion 9c, 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, the brush 9j can reliably remove foreign substances such as chips that are relatively easily deposited on the horizontal surface formed on the perforated surface 1d as described above.

  After the contaminants are removed from the perforations 1c by the brush 9j, the shaft member 9a and the brush 9j are retracted from 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 the openings 10a and 10a are closed in a sealed manner by lids 11 and 11, respectively.

  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.

  Further, a communication port 13a communicating with the inside and the outside of the valve housing 13 is formed on the side portion of the valve housing 13 so as to project upward from the side surface of the valve housing 13 above the communication port 13a. A flange portion 13h is formed. As shown in FIG. 7, a plurality of bolt holes 13i are formed in the flange portion 13h at equal intervals along the circumferential direction. 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. At this time, the opening flange portion 3b and the flange portion 13h are disposed to face each other in the vertical direction.

  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.

  At this time, the rust prevention member 16 is simultaneously elastically deformed between the lower end portion of the valve housing 13 and the perforated surface 1d of the perforation 1c, and between the outer surface of the valve housing 13 and the inner surface of the housing 2. Thus, the fluid pipe 1 is sealed in the housing 2 and the valve housing 13. That is, the rust prevention member 16 of this embodiment has both a rust prevention function and a sealing function. 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 addition, the rust prevention member may have only the rust prevention function which rusts a perforated surface.

  In this state, as shown in FIG. 8, the working bolts 6 are removed from the bolt holes 3d of the opening flange portion 3b, and the fixing bolts 18 are replaced by bolts 3d and bolts in place of the working bolts 6 in the respective bolt holes 3d. Screw into the hole 13i. By screwing the bolt, the flange portion 13h and the opening flange portion 3b of the valve housing 13 are tightened, whereby the rust preventive member 16 is elastically deformed between the valve housing 13 and the drilling surface 1d of the drilling 1c. At the same time, the valve housing 13 is in close contact with the perforation surface 1d of the perforation 1c, and the valve housing 13 is attached in a sealed manner to the opening flange portion 3b.

  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 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. Further, 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 this embodiment, the valve casing is screwed into the bolt hole 3d formed in the opening flange portion 3b and the bolt hole 13i formed in the flange portion 13h of the valve casing 13 so as to be screwed. 13 is attached to the opening flange portion 3b in a sealed manner, but the dust prevention member 20 for preventing dust from entering between the opening flange portion 3b and the flange portion 13h may be attached to the opening flange portion 3b. Good.

  In this case, the dust-proof member 20 attached to the opening flange portion 3b is preferably formed of a ring-shaped elastic member, and is in close contact with the upper edge of the opening flange portion 3b and the outer peripheral surface of the flange portion 13h. It becomes possible to suppress the maintenance frequency of the housing | casing 2 and the valve housing | casing 13 accompanying a dust. The shape of the dustproof member 20 is substantially the same as that of the flange portion 13h, and in the mounted state, the outer diameter of the dustproof member 20 is substantially the same as the outer diameter of the opening flange portion 3b, and the dustproof member. 20 is preferably formed to be substantially the same as the outer diameter of the flange portion 13h. According to such a shape of the dust-proof member 20, the opening flange portion 3b and the flange portion 13h are formed by the mounting tool 5 described above. It is possible to eliminate the level difference that has occurred.

  The dust-proof member 20 may be a ring structure with a divided structure made of metal or the like, for example, as long as dust can be prevented from entering the mounting portion between the opening flange portion 3b and the valve housing 13. .

  As described above, in the valve housing installation device according to the present embodiment, the drilling means is the end mill 9b provided at the end of the shaft member 9a rotating around the axis, and the case body 8 is connected to the end of the end mill 9b. Since the handling part 9c, the rail 9e, and the slide base 9f for moving the shaft member 9a in parallel are provided so that the part penetrates part of the wall of the fluid pipe 1, the case body 8 is provided. The handling portion 9c, the rail 9e, and the slide base 9f translate the shaft member 9a provided with the end mill 9b at the end, and the end of the end mill 9b drills across a part of the wall of the fluid pipe 1. Not only can the shaft member 9a be drilled easily and accurately only by the parallel movement of the shaft member 9a, but the degree of freedom of the drilling shape that is appropriately formed according to the diameter and the drilling depth of the end mill 9b is increased. Further, by drilling the wall of the fluid pipe 1 while moving the end mill 9b in parallel, the drilling position in the drilling depth direction in the end mill 9b for drilling the pipe wall gradually changes. Can be distributed without local concentration. Furthermore, by forming the perforated surface 1d of the fluid pipe 1 facing the end surface of the end mill 9b as a flat surface, the valve housing 13 can be easily provided on the perforated surface 1d.

  Further, since the valve housing 13 is provided with the rust prevention member 16 for preventing the perforated surface 1d of the fluid pipe 1 from being rusted, the rust prevention provided in the valve housing 13 is provided even for the metal fluid pipe 1. The member 16 can rust prevent the perforated surface 1d from which the metal substrate is exposed.

  In addition, since the fixture 5 having a through hole 5c connected to the case body 8 is detachably provided in the opening flange portion 3b and the case body 8 of the housing 2, the valve housing 13 is attached to the housing. Since it can be removed from the opening flange portion 3b of the housing 2 together with the case body 8 after being installed on the opening flange portion 3b of the body 2, the connection portion with the case body 8 is attached to the opening flange portion 3b of the housing 2 itself. Not only can the size be reduced simply by providing a connection portion with the valve housing 13, but also when the end mill 9 b provided in the case body 8 is drilled and the through hole 5 c of the fixture 5 is overloaded and damaged. Even if there is, it can be easily repaired only by exchanging the fixture 5.

  Further, the opening flange portion 3b of the housing 2 is provided with a dustproof member 20 for preventing dust from entering the attachment portion between the opening flange portion 2b and the valve housing 13, and therefore the opening flange portion 3b is provided by the dustproof member 20. No dust enters between the valve housing 13 and the valve housing 13.

  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 5 Attachment 5a Dividing member 5c Through-hole (connection part)
8 Case body 8a Work valve 9 Cutting device 9a Shaft member 9b End mill (drilling means)
9c Handling part (drive part)
9e rail (drive unit)
9f Slide table (drive unit)
13 Valve housing 14 Valve body 16 Antirust member 20 Dustproof member

Claims (4)

A casing that is hermetically attached to the fluid pipe, a case body that is attached in communication with the opening flange portion of the casing, and a punching means that is provided in the case body and drills a hole in the fluid pipe. A valve housing installation device that installs a valve housing having a valve body that can close a perforation of a fluid pipe and an inner peripheral surface in an open flow state in an open flange portion of the housing,
The drilling means is an end mill provided at an end portion of a shaft member that rotates about an axis, and the end portion of the end mill is drilled in the case body across a part of a fluid pipe wall. The valve housing installation device is characterized in that a drive unit for translating the shaft member is provided.   The valve casing installation device according to claim 1, wherein the valve casing is provided with a rust prevention member that rusts the perforated surface of the fluid pipe.   The attachment tool provided with the connection part connected to the said case body is provided in the opening flange part of the said housing | casing, and the said case body so that removal is possible, The removal of Claim 1 or 2 characterized by the above-mentioned. Valve housing installation device.   The dust-proof member which prevents the entrance of the dust to the attachment part of this opening flange part and the said valve housing is provided in the opening flange part of the said housing | casing. Valve housing installation device.

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