JP5183234B2 - Water control body installation device - Google Patents

Description

  According to the present invention, a water control unit having a flange disposed on a cut surface side of an existing fluid pipe is cut off at a predetermined position in a water-tightly sealed case by cutting a predetermined position of the existing fluid pipe in an indefinite water state by a pipe cutting means. It is related with the water control body installation apparatus which installs in a watertight connection between a water control body and an existing fluid pipe | tube with a coupling ring.

  In a conventional water control body installation device, a pipe portion that forms a fluid conduit in the water control body is provided with a sleeve portion that is movable in the direction of the pipe axis along the outer periphery of the pipe portion, and the sleeve after the water control body is installed The part moves in the tube axis direction and is connected to the joint ring in a watertight manner (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2007-46680 (page 6, FIG. 5)

  However, in Patent Document 1, since the pipe portion of the water control body has a cylindrical shape whose outer diameter does not change in the tube axis direction, the sleeve portion extends in the tube axis direction along the outer periphery of the pipe portion. Although it functions so that it can move, conventionally, there is also a flanged type water control body with a flange bulging in the radial direction at the end of the pipe section, and this type of water control body Then, since the sleeve portion does not function because its movement is blocked by the flange, it is difficult to use this type of water control body for watertight connection with the existing fluid pipe.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a water control body installation device capable of watertightly connecting a water control body having a flange and an existing fluid pipe.

In order to solve the above-described problem, a water control body installation device according to claim 1 of the present invention provides:
Within a watertight sealed housing, a predetermined portion of the existing fluid pipe is excised in an undisturbed state by a tube excision means, and a water control body having a flange disposed on the cut surface side of the existing fluid pipe is installed at the predetermined location A water control body installation device for connecting the water control body and the existing fluid pipe in a watertight manner by a joint ring,
A sealing flange including a first seal member interposed between the side end surfaces of the flange of the water control body and a second seal member interposed between the joint rings is connected to the flange of the water control body. It is,
In the sealing flange, the second seal member is provided on each of a peripheral end surface facing a guide portion extending in a pipe axis direction of the joint ring and a side end surface facing a side end portion of the joint ring. It is characterized by being.
According to this feature, in the housing, the water control body installed at a predetermined position of the existing fluid pipe cut by the pipe cutting means and the joint ring connected between the existing fluid pipe are provided along the outer periphery of the existing fluid pipe. The seal flange that is moved in the pipe axis direction and is watertightly connected to the flange of the water control body by the first seal member is connected to the flange of the water control body by the second seal member. Therefore, the water control body having the flange and the existing fluid pipe can be connected in a watertight manner simply by interposing a sealing flange connected in a watertight manner.
Further, the second seal members provided on the peripheral end surface and the side end surface of the sealing flange are interposed between the guide portion and the side end portion of the joint ring, respectively, to double seal the seal member. Thus, the watertightness between the sealing flange and the joint ring can be enhanced.

The water control body installation device according to claim 2 of the present invention is the water control body installation device according to claim 1,
The first sealing member and the second sealing member of the sealing flange are provided in a circumferential direction.
According to this feature, since the said first sealing member provided on the peripheral surface of the sealing flange and the two side end faces the second seal member is provided over the circumferential direction, the sealing flange and the joint ring And can improve water tightness.

The water control body installation device according to claim 3 of the present invention is the water control body installation device according to claim 1 or 2,
The sealing flange has a female screw recess formed substantially coaxially in a bolt hole formed in the pipe axis direction in the flange of the water control body.
According to this feature, the sealing flange can be installed using the existing bolt hole of the water control body flange by simply screwing the bolt into the bolt hole of the water control body flange and the female thread recess of the sealing flange. Easy to install. In addition, since the female thread recess does not penetrate the sealing flange to the joint ring side, the bolts screwed into the female thread recess may interfere with the connection of the sealing flange to the joint ring, or the fluid may be at both ends of the sealing ring. The risk of leaking through the surface can be avoided.

The water control body installation device according to claim 4 of the present invention is the water control body installation device according to any one of claims 1 to 3,
The sealing flange has a bolt hole penetrating substantially coaxially with a bolt hole formed in the pipe axis direction in the flange of the water control body and a bolt hole formed in the pipe ring direction in the joint ring. It is a feature.
According to this feature, the bolts on the flange of the water control body, the bolt holes of the sealing flange, and the bolt holes of the joint ring are simply screwed into the bolt holes of the water control body in a coaxial manner. When bolt holes are already provided in the flange and joint ring of the water control body without any additional processing for attaching the sealing flange, the bolts are used to connect the water control body and the joint through the sealing flange. Ring can be connected.

The water control body installation device according to claim 5 of the present invention is the water control body installation device according to claim 4,
A bolt member having watertightness is attached to a bolt hole disposed substantially coaxially with the flange of the water control body, the sealing flange, and the joint ring.
According to this feature, the three members are integrated by the watertight bolt member screwed into the bolt hole disposed substantially coaxially with the flange of the water control body, the sealing flange, and the joint ring, and the fluid in the pipe is The possibility of leaking outside through these bolt holes can be avoided.

  Examples of the present invention will be described below.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 shows that an existing fluid pipe is provided with a casing and a joint ring that are used when installing a water control body in a non-continuous water state in the embodiment of the present invention. It is a top view which shows the state. FIG. 2 is a front view showing the water control body. Fig.3 (a) is a side view which shows a sealing flange, (b) is AA sectional drawing of Fig.3 (a) which shows a sealing flange. FIG. 4A is a partial cross-sectional view showing a state where the insertion of the water control body is completed, and FIG. 4B is a partial cross-sectional view showing a state where the water control body in the insertion completion state is fixed by a joint ring. FIG. 5 is an enlarged cross-sectional view of FIG. FIG. 6A is a schematic diagram showing a tube excision means for cutting an existing fluid pipe, and FIG. 6B is a schematic diagram showing a connection state between the pipe excision means and the existing fluid pipe. 4 will be described as the front side of the fluid pipe, the left and right sides of FIG. 4 are the left and right sides of the existing fluid pipe, and the upper and lower sides of FIG. 4 are the upper and lower sides of the existing fluid pipe.

  As shown in FIG. 1, the coupling rings 30, 30 of the present embodiment include the existing fluid pipe 1 in the vicinity of the upstream side and the downstream side of a predetermined location K where the existing fluid pipe 1 that is a water pipe is cut as described later. Are attached to the outer surface of each of the outer peripheral surfaces along the circumferential direction.

  In addition, a part of the existing fluid pipe 1 including the predetermined portion K and the joint rings 30 and 30 is sealed in a watertight manner by the housing 7. In this casing 7, the existing fluid pipe 1 at a predetermined location K is cut by a pipe cutting means 60 (see FIG. 6A) having a perforated blade 62a having a substantially circular shape in plan view. The tube piece 1 ′ separated from the tube 1 is removed from the housing 7. In the figure, the alternate long and short dash line indicates the locus of the drilling blade 62a.

  As shown in FIGS. 6A and 6B, the tube excision means 60 includes a body 61 having an inner diameter substantially the same as the inner diameter of the upper opening 7d, and a drilling hole accommodated in the inner space of the body 61. The cutter 62 and the punching cutter 62 which can move the punching cutter 62 toward the predetermined location K of the existing fluid pipe 1 and can rotate the punching cutter 62 around its axis are configured.

  Further, the perforating cutter 62 has an inner diameter and a height that are larger than the outer diameter of the existing fluid pipe 1, and has a perforating blade 62a disposed downward on the periphery of the lower end and the same central axis as the perforating blade 62a. It is formed in an inner cylindrical shape having a center drill 62b disposed downward at a position lower than the punching blade 62a and a hooking piece 62c provided at the tip of the punching blade 62a.

  Next, the cutting process of the existing fluid pipe 1 will be described. The on-off valve 64 is closed, the central axis of the cylindrical piercing cutter 62 is substantially in the vertical direction, and the existing fluid pipe 1 in the housing 7 is closed. The body 61 is connected in a watertight manner above the on-off valve 64 so as to be disposed at a position substantially perpendicular to the central axis.

  Next, the opening / closing valve 64 is opened and the punching cutter 62 is moved by the punching machine 63 in which the punching blade 62a moves forward and backward so as to pass through the entire cross section of the existing fluid pipe 1 while rotating the punching cutter 62. Move down. By rotating and lowering the drilling cutter 62, the existing fluid pipe 1 is lowered from the outer peripheral surface of the upper surface of the existing fluid pipe 1 by two cut surfaces 26 a and 26 b between the diameters of the lower end periphery of the drilling cutter 62. The existing fluid pipe 1 is cut at the two cut surfaces 26a and 26b at the point where the perforated blade 62a is lowered so as to pass through the entire cross section of the existing fluid pipe 1, and the two cut surfaces are cut. The pipe piece 1 ′ is separated from the pipe line of the existing fluid pipe 1 between 26 a and 26 b.

  In the cutting operation of the existing fluid pipe 1 described above, since the existing fluid pipe 1 is in an undisrupted water state, the existing fluid pipe 1 of the present embodiment is in a full water state with water pressure applied, and in the cutting operation by the perforating cutter 62. When the center drill 62b reaches the inside of the existing fluid pipe 1 from the outer peripheral surface of the upper surface of the existing fluid pipe 1, the fluid inside the existing fluid pipe 1 leaks outside the pipe, The inside of the fuselage 61 connected in communication is filled. However, the fluid leaking from the inside of the existing fluid pipe 1 does not leak to the outside of the housing 7. Accordingly, the cutting operation can be performed while the fluid in the existing fluid pipe 1 remains in an undisrupted state.

  Further, the chips generated when the existing fluid pipe 1 is cut can be discharged together with the fluid in the existing fluid pipe 1 through the discharge port 7c provided in the lower portion in the vicinity of the predetermined location K of the housing 7 so as to be opened and closed. It has become.

  Next, after the cutting operation of the existing fluid pipe 1, the piercing cutter 62 disposed inside the body 61 and the cut pipe piece 1 'hooked on the hook piece 62c of the center drill 62b are simultaneously encased. Carry it out of the body 7.

  In addition, the step of carrying out from the inside of the housing 7 is such that the fluid in the existing fluid pipe 1 is closed by closing the on-off valve 64 after pulling out the discharged goods (tube piece 1 ′ and existing pipe cutting means) into the body 61. It is possible to carry out the work in an indefinite water state without leaking outside the housing 7.

  Note that the tube excision means 60 in the present invention is not necessarily limited to the above-described configuration. For example, an existing fluid tube may be used as long as the predetermined portion K of the existing fluid tube 1 in the casing 7 is excised in a watertight manner. The existing fluid pipe 1 may be cut by rotating the cutting blade in the circumferential direction 1.

  Next, the connection between the water control body 2 and the existing fluid pipe 1 will be described.

  The cut surfaces 26a and 26b of the existing fluid pipe 1 shown in FIG. 1 cut by the above-described substantially circular perforated blade 62a in plan view have a concave shape in which the plan view tube axis side is recessed, and the side view tube axis side bulges. It forms in a pair so that it may form convex shape, and the water control body 2 is installed between the opposing surfaces of these cut surfaces 26a and 26b.

  The water control body 2 will be described below. As shown in FIG. 2, the water control body 2 is a gate valve that partitions the pipe by the vertical movement of the valve body, and is described later in a general-purpose flanged water control body body. A sealing flange 31 is connected by a bolt 29, and the body of the water control body is substantially the same diameter as the existing fluid pipe 1 and has a pipe line part 39b having both ends communicating in a cylindrical shape, and this pipe line part 39b. And an annular flange Fa bulging in the radial direction at both ends, and a valve shaft 35 that is rotatable by being connected to a valve body (not shown) that opens and closes the inside of the pipe line portion 39b.

  As shown in FIG. 3, the sealing flange 31 is formed in an annular shape having an outer diameter and an inner diameter that are substantially the same as the flange Fa. Further, a first seal member 45 is provided in a concave groove 31c formed in an annular shape on the side end surface 31a on the side connected to the flange Fa, and similarly, the side end surface 31b on the side connected to the joint ring 30; Second seal members 46 and 49 are provided in the annular grooves 31e and 31f, respectively, on the circumferential end surface 31d.

  Further, the sealing flange 31 has a female screw recess 42 in which a female screw is screwed on the inner surface at predetermined intervals in the circumferential direction on the side end surface 31a, and a bolt hole penetrating the side end surfaces 31a and 31b. 41.

  As shown in FIG. 5, the sealing flange 31 includes bolts 29 inserted in the pipe axis direction from the valve shaft 35 side of the water control body 2 to the flanges Fa, Fa at both ends of the water control body main body 42. By being screwed in, the first seal member 45 is connected in a watertight manner. Thus, the sealing flange 31 can be formed using the existing bolt hole 44 of the flange Fa simply by screwing the bolt 29 into the bolt hole 44 of the flange Fa and the female screw recess 42 of the sealing flange 31. Easy to install.

  The water control body 2 having the above-described configuration is suspended by a suspension means (not shown) through the upper opening 7d of the casing 7, and the shaft of the conduit 39b is connected to the fluid pipe 1 as shown in FIG. It is configured to be placed on and supported by the cradle 7b in a direction and a height position according to the tube axis. In this state, the side end surface 31b side of the sealing flange 31 and the cut surfaces 26a and 26b of the existing fluid pipe 1 are separated by a predetermined distance.

  Next, the joint ring 30 is moved along the tube axis of the existing fluid pipe 1 as described later, and connected to the water control body 2 (see FIG. 4B). The joint ring 30 is a general cylindrical ring having an inner diameter slightly larger than the outer diameter of the existing fluid pipe 1, and a seal member 48 extending in the circumferential direction in a recess formed on the inner peripheral surface. Is provided. Further, the end portion on the water control body 2 side bulges in the radial direction and faces the side end surface 31b of the sealing flange 31, and extends in the tube axis direction continuously to the side end portion 30a, and the sealing flange 31. And a guide portion 30c facing the peripheral end surface 31d. Furthermore, a bolt hole 47 is formed in the side end portion 30a in the tube axis direction.

  Further, on the outer surface of the joint ring 30 near the side opening 7a of the housing 7, a convex portion 30b formed as a convex portion in the radial direction is provided along the circumferential direction. 7 is screwed into a feed screw 51 pivotally supported in the tube axis direction, and is fitted into a concave piece 52 formed to be movable in the tube axis direction. Accordingly, by rotating the end 51a of the feed screw 51 protruding to the outside of the casing 7 forward and backward, the joint ring 30 can move in the tube axis direction along with the movement of the concave piece 52.

  Next, the connection between the joint ring 30 and the water control body 2 will be described. As shown in FIG. 4B, in the state where the water control body 2 is installed at a predetermined location K in the housing 7, the housing 7. The joint ring 30 moves toward the sealing flange 31 along the outer surface of the existing fluid pipe 1 through the concave piece 52 by rotating the end 51a of the feed screw 51 projecting outward from the side of the feed screw 51 in the normal direction. To do.

  As shown in FIG. 5, the guide portion 30 c of the joint ring 30 has a shape in which the inner peripheral surface expands toward the tip in the tube axis direction, and the joint ring 30 moves in the tube axis direction. At the same time, the inner circumferential side of the guide portion 30 c is engaged with the circumferential end surface 31 d of the sealing flange 31 over the entire circumference, thereby being positioned with respect to the water control body 2.

  And the guide part 30c of the joint ring 30 presses the 2nd seal member 49 over the circumferential direction between 31 d of peripheral edges of the sealing flange 31, as FIG. 30 a abuts the second seal member 46 in the circumferential direction between the side end face 31 b of the sealing flange 31.

  Next, the bolt 28 constituting the bolt member 58 having water tightness is integrally inserted substantially coaxially into the bolt hole 43 of the flange Fa, the bolt hole 41 of the sealing flange 31 and the bolt hole 47 of the joint ring 30. And tighten with the nut 27. Only by doing in this way, the process for attaching the sealing flange 31 to the flange Fa and the joint ring 30 is not separately performed. Further, if the existing bolt holes 43 and 47 are formed in the flange Fa and the joint ring 30, the water control body 2 and the joint ring 30 can be easily connected via the sealing flange 31 using the bolt holes 43 and 47. Can be connected.

  O-rings 59 and 59 having a diameter larger than that of the bolt holes 43 and 47 are respectively disposed on a surface of the bolt 28 head on the nut 27 side and a surface of the nut 27 on the head side of the bolt 28. 28, the fluid is prevented from leaking from the bolt holes 41, 43, 47 by being pressed by tightening the nut 27. As described above, the bolts 58 having the watertightness screwed into the bolt holes 41, 43, and 47 disposed substantially coaxially with the flange Fa, the sealing flange 31, and the joint ring 30 allow fluid in the pipe to be transferred to the bolt holes. The possibility of leaking outside through 41, 43, 47 can be avoided.

  Further, when the bolt 28 and the nut 27 are tightened, the sealing flange 31 and the joint ring 30 are brought into close contact with each other, and the second seal members 46 and 49 interposed therebetween are pressed, whereby the second seal. The seal member 46 and the above-described seal member 49, which are members, prevent double leakage of fluid from between the seal flange 31 and the joint ring 30.

  As described above, the seal members 46 and 49 provided on the peripheral end surface 31d and the side end surface 31b of the sealing flange 31 are interposed between the guide portion 30c and the side end portion 30a of the joint ring 30, respectively. Thus, the watertightness between the sealing flange 31 and the joint ring 30 can be improved.

  Furthermore, since the female screw recess 42 does not penetrate the sealing flange 31 to the joint ring 30 side, the bolt 29 screwed into the female screw recess 42 is an obstacle to the connection of the sealing flange 31 to the joint ring 30. It is possible to avoid fears and the risk of fluid leaking through both end faces of the sealing flange 31.

  As described above, the joint ring 30 connected between the water control body 2 installed at the predetermined location K of the existing fluid pipe 1 cut by the pipe cutting means 60 and the existing fluid pipe 1 in the housing 7 is as follows. It moves in the direction of the pipe axis along the outer periphery of the existing fluid pipe 1 and is connected in a watertight manner by the second seal members 46 and 49 to the sealing flange 31 that is connected in a watertight manner to the flange Fa by the first seal member 45. As a result, the water control body 2 provided with the flange Fa and the existing fluid pipe 1 can be connected in a watertight manner only by interposing the sealing flange 31 connected in a watertight manner to the flange Fa.

  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 sealing flange 31 has the second seal on both the circumferential end surface 31 d facing the guide portion 30 c of the joint ring 30 and the side end surface 31 b facing the side end portion 30 a of the joint ring 30. The members 46 and 49 are respectively provided in the circumferential direction. For example, the second seal member may be provided only on either the peripheral end surface or the side end surface of the sealing flange.

  Further, for example, in the above-described embodiment, the water control body 2 is described as a gate valve that opens and closes a pipe line by the vertical movement of the valve body. However, the use and configuration of the water control body are not limited to this, for example, a butterfly valve, It may be a water control valve such as a rotary valve or a branch valve, or may be an installation body such as a flow meter or a generator, and its type is not specified.

It is a top view which shows the state with which the housing | casing and joint ring which are used when installing a water control body in the unrestricted water state in the Example of this invention were equipped with the existing fluid pipe | tube. It is a front view which shows a water control body. (A) is a side view which shows a sealing flange, (b) is AA sectional drawing of Fig.3 (a) which shows a sealing flange. (A) is a partial cross section figure which shows the insertion completion state of a water control body, (b) is a partial cross section figure which shows the state which fixed the water control body of the insertion completion state by the coupling ring. FIG. 5 is an enlarged cross-sectional view of FIG. (A) is the schematic which showed the tube excision means which cut | disconnects an existing fluid pipe | tube, (b) is the schematic which shows the connection state of a pipe excision means and an existing fluid pipe | tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing fluid pipe 1 'Pipe piece 2 Water control body 7 Housing | casing 26a, 26b Cut surface 30 Joint ring 30b Convex part 30c Guide part 31 Sealing flange 31b Side end surface 31d Peripheral end surface 41 Bolt hole 42 Female screw recessed part 43 Bolt hole 44 Bolt Hole 45 First seal member 46 Second seal member 47 Bolt hole 49 Second seal member 58 Bolt member 60 Pipe cutting means K Predetermined portion Fa Flange

Claims (5)

Within a watertight sealed housing, a predetermined portion of the existing fluid pipe is excised in an undisturbed state by a tube excision means, and a water control body having a flange disposed on the cut surface side of the existing fluid pipe is installed at the predetermined location A water control body installation device for connecting the water control body and the existing fluid pipe in a watertight manner by a joint ring,
A sealing flange including a first seal member interposed between the side end surfaces of the flange of the water control body and a second seal member interposed between the joint rings is connected to the flange of the water control body. It is,
In the sealing flange, the second seal member is provided on each of a peripheral end surface facing a guide portion extending in a pipe axis direction of the joint ring and a side end surface facing a side end portion of the joint ring. The water control body installation apparatus characterized by being. The water control body installation device according to claim 1, wherein the first seal member and the second seal member of the sealing flange are provided in a circumferential direction .   The said sealing flange has the internal thread recessed part drilled substantially coaxially in the bolt hole formed in the pipe-axis direction at the flange of the said water control body, The control of Claim 1 or 2 characterized by the above-mentioned. Water body installation device.   The sealing flange has a bolt hole penetrating substantially coaxially with a bolt hole formed in the pipe axis direction in the flange of the water control body and a bolt hole formed in the pipe ring direction in the joint ring. The water control body installation device according to any one of claims 1 to 3.   5. The water control body installation according to claim 4, wherein a bolt member having water tightness is attached to a bolt hole disposed substantially coaxially with the flange of the water control body, the sealing flange, and the joint ring. apparatus.

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