JP4447412B2 - Continuous water flow path forming device for existing fluid pipes - Google Patents

Description

  The present invention relates to a continuous water flow path forming apparatus for an existing fluid pipe that can switch the flow path of an existing fluid pipe such as a water and sewage pipe and a gas pipe without temporarily blocking the flow of an internal fluid.

  A conventional continuous flow channel forming device for an existing fluid pipe is mounted on a peripheral surface of an existing fluid pipe in a watertight manner, and after cutting the existing fluid pipe inside the casing, the cut surface of the existing fluid pipe A flow path forming device such as a partition is installed between them (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 4-29188 (page 1, Fig. 3)

  However, in Patent Document 1, after the existing fluid pipe is cut, when the partition installed between the cut surfaces in the pipe is installed at a predetermined position, between the partition and the inner surface of the housing. Since watertightness is required, when the partition is lowered by a downward pressing force, the partition is affected by water pressure in the pipe and the space between the partition and the installation position of the inner surface of the housing. There was a problem that a shift occurred and the installation position could not be accurately set.

  The present invention has been made paying attention to such problems, and when a partition is installed at a predetermined position between cut surfaces in a pipe after the existing pipe is cut, the partition is pushed downward. Even when a shift occurs due to the influence of the water pressure or the like in the pipe during the lowering operation, the correction is made toward the installation position, and the partition body is installed accurately.

In order to solve the above-mentioned problem, the continuous fluid flow path forming device for an existing fluid pipe according to claim 1 of the present invention seals the outer peripheral surface of the existing fluid pipe with a casing capable of securing at least three-direction flow paths. A continuous water flow path forming device for an existing fluid pipe that cuts the existing fluid pipe in a continuous water state, and installs a partition body to form another flow path by an insertion means installed inside the housing,
The partition includes a partition plate that blocks at least one flow path of the fluid in the housing, and guides to the installation position inside the housing by sandwiching both front and back sides of the partition plate on the inner surface of the housing. A pair of front and back guide pieces are provided, and the guide pieces are divided into at least two parts in the vertical direction, and the pair of front and back guide pieces in the upper part is formed in an upwardly opening tapered shape, and the pair of front and back guide pieces in the lower part. Are provided substantially in parallel, and the upper end portion of the guide piece is formed in a notch portion that is expanded upward .
According to this feature, when the partition is installed between the cut surfaces by the insertion means, the partition plate is guided by the guide piece and guided to a predetermined installation position when the partition is lowered, so that Even under the influence of water pressure or the like, the installation work of the partition becomes easy.

In addition, when the partition body is installed between the cutting surfaces by the insertion means, when the partition body is lowered, the partition body is guided from both the front and back sides of the partition plate by the pair of front and back guide pieces. It can be installed without detachment.

Also, when installing the partition body between the cut surfaces, the insertion operation of the partition body is easy with the upper opening tapered guide piece at the top, and the position of the partition body is corrected by the pair of front and back guide pieces. However, after installation, it is accurately guided to a predetermined installation position.

In addition, the partition body is guided from both the front and back sides of the partition body by a pair of front and back guide pieces formed in a lower part substantially parallel to each other , so that the partition body is accurately installed at an installation position and is not inclined.

Further, when the partition plate is moved downward from the pair of front and back guide pieces to the pair of front and back guide pieces in the lower portion, the lower end portion of the partition plate projects into the upper end portion of the guide piece in the lower portion. It is installed accurately at the installation position without touching, and installed without tilting.

  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 the entire piping in which a continuous water flow path forming device is attached to an existing water pipe 1 in the first embodiment of the present invention and a new water pipe 3 is connected in communication. It is a top view which shows an image. (A) is a plan view showing a state in which the continuous water channel forming device is attached to the existing water pipe 1 and the new water pipe 3 is connected in communication and the flow direction of the fluid in the pipe, and (b) is a continuous water channel. It is the top view which showed the state which cut | disconnected the existing water pipe 1 inside a formation apparatus, and the flow direction of the fluid in a pipe | tube, (c) is the partition 4 in an unrestricted water flow path formation apparatus, after cutting the existing water pipe 1 It is the top view which showed the state which installed and the flow direction of the fluid in a pipe | tube. Fig.2 (a) is a perspective view which shows the partition body 4 in this invention, (b) is a perspective view which shows the whole image of a continuous water flow path formation apparatus. FIG. 3 is a plan view showing the entire continuous water flow path forming apparatus. FIG. 4 is an ff cross-sectional view of the casing of the continuous water flow path forming device, showing stepped portions provided integrally and continuously on the inner side surface and the inner bottom surface of the casing. Fig.5 (a) is a longitudinal cross-sectional view of the housing | casing of a continuous water flow path formation apparatus in the middle point in which the partition body 4 descend | falls toward the installation position from the upper direction of a housing | casing, (b) is a partition body 4 is a longitudinal cross-sectional view of the casing of the continuous water flow path forming device at a point installed at the installation position. 6 is an enlarged cross-sectional view of aa and cc of FIG. 3 showing a butting portion that joins the upper housing 11 and the lower housing 12 which are divided into upper and lower parts by welding. It is the expanded sectional view which showed the butt | matching part before welding processing, (b) is the expanded sectional view which showed the butt | matching part after welding processing, (c) It is an expanded sectional view which showed the butt | matching part after grinding processing is there. FIG. 7 is a view showing a guide piece for guiding the partition 4 to the installation position on the inner side surface of the housing, (a) is a plan view showing the guide piece in the housing, and (b) is (a). It is a dd sectional view in (a), and (c) is cc sectional view in (a). FIG. 8 is a side cross-sectional view showing the steady pin 22 at the installation position on the inner side surface of the housing of the partition 4. FIG. 9 is a schematic view showing a piercing cutter for cutting a pipe inside the continuous water flow path forming device 2. FIG. 10 is a schematic view showing an insertion machine for installing the partition body 4 inside the continuous water flow path forming device 2. FIG. 11 is a cross-sectional view taken along the line ee of FIG. 5B in a state where the partition 4 is installed inside the continuous water flow path forming device 2. FIG. 12 is a view showing a modification of the guide piece that guides the partition body 4 to the installation position on the inner side surface of the housing.

  As shown in FIG. 1 (a), the piping situation after installation of the continuous water flow path forming device 2 in the first embodiment of the present invention is as follows, with respect to the flow direction of the fluid in the pipe of the existing water pipe 1 that is a water pipe. For example, a continuous water flow path comprising the casing 10 in the first embodiment of the present invention is provided at two upstream and downstream pipe portions sandwiching a specific area E that needs to be removed or repaired in a part of the existing water pipe 1. The forming apparatus 2 is water-tightly attached to the outer peripheral surface of the existing water pipe 1 and the new water pipe 3 that connects the two continuous water flow path forming apparatuses 2 in communication is disposed, and then the existing water pipe 1 inside the housing 10 is disposed. A part is cut | disconnected (FIG.1 (b)), the partition body 4 is mounted | worn with a cutting | disconnection location, and it has the structure which detours the existing flow path of the existing water pipe 1, as shown in FIG.1 (c).

  Due to the new installation of the detour route by the arrangement of the continuous water flow path forming device 2 and the newly installed water pipe 3, the fluid in the pipe does not flow down to the specific area E of the existing water pipe 1, so that it is located in the specific area E. Work such as removal or repair of the pipe part becomes possible.

  As shown in FIGS. 2 and 8, the outer shape of the continuous water flow path forming device 2 in the first embodiment of the present invention is composed of a partition 4 that changes the flow path of an existing water pipe and a housing 10. 10 can be divided into two upper and lower parts composed of an upper housing 11 and a lower housing 12. The casing 10 is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the existing water pipe 1. A circular upper opening U that opens upward is formed on the upper surface, and a horizontal opening is also formed on the side surface. Three circular side openings A, A ′ and B are formed.

  As shown in FIGS. 2 and 3, of the side openings A, A ′ and B, the side openings having the same central axis C in the horizontal direction and located opposite to each other on the side surface of the housing 10. The inner diameters of the portion A and the side opening A ′ are formed to be substantially the same or slightly larger than the outer diameter of the existing water pipe 1, and the inner surfaces of the side openings A and A ′ in the vicinity of both ends are watertight. A typical sealing material 8c is provided. Further, the central axis D of the side opening B is formed in a horizontal direction substantially orthogonal to the central axis C.

  Reinforcing ribs 14 are provided on the outer surface of the upper housing 11 and the lower housing 12 and on the outer bottom surface of the housing 12, and the bottom surface of the housing 12 is installed inside the housing 10. Drainage ports 13 that can be opened and closed are provided at two locations sandwiching the partition 4 from the front and back sides.

  The attachment of the continuous water flow path forming device 2 to the existing water pipe 1 will be described with reference to FIG. 2B. The upper housing 11 and the lower housing 12 are respectively connected to the central axis from above and below the existing water pipe 1. At the position where C and the central axis of the existing water pipe 1 are aligned, the outer peripheral part of the existing water pipe 1 is attached. A butt portion of the upper casing 11 and the upper casing 12 mounted on the outer peripheral portion of the existing water pipe 1 is formed with a groove portion 18 for welding. As will be described later with reference to FIG. 11. The upper casing 11 and the lower casing 12 are joined by welding from the outer surface of the lower casing 12. Moreover, the outer periphery of the housing | casing 10 and the existing water pipe 1 is inserted in the opening part A and opening part A 'between the flange 17 by the side of the housing | casing 10, and the pushing ring | wheel 17' of a division structure in the opening part A '. Join the surface.

  The interior of the housing 10 becomes watertight by joining the upper housing 11 and the lower housing 12 by welding and joining the opening A and both ends of the opening A ′ and the outer peripheral surface of the existing water pipe 1. ing.

  Here, in the present embodiment, as shown in FIG. 1 and described above, after the continuous water flow path forming device 2 is mounted at two locations, the upstream portion and the downstream portion across the specific area E of the existing water pipe 1. A new water pipe 3 connected in a watertight manner to each opening B is disposed. As a result, as shown in FIG. 1 (a), the internal space of the continuous water flow path forming device 2 and the newly installed water pipe 3 in the upstream portion and the downstream portion sandwiching the specific area E is a closed space integrally connected. Yes and watertight.

  Next, the work process will be described with reference to FIGS. 9 and 10. In the continuous water flow path forming device 2 disposed on the upstream side, the upper opening U can be opened and closed at the upper opening U, and in the closed state. Is provided with an on-off valve 30 that can maintain the water tightness inside the continuous water flow path forming device 2, and the on-off valve 30 after the arrangement is kept closed. Subsequently, a perforation blade 32a having an inner diameter and a height larger than the outer diameter of the existing water pipe 1 and disposed downward on the peripheral edge of the lower end, and having the same central axis as the perforation blade 32a, from the perforation blade 32a An inner hollow cylindrical drilling cutter 32 having a center drill 32b disposed downward at a lower position and a hook 32c provided at the front of the center drill 32b is provided in the inner space of the body 31. The body 31 is opened and closed so that the central axis of the cylindrical piercing cutter 32 is substantially vertically oriented and intersects the central axis of the existing water pipe 1 in the housing 10 in a direction substantially perpendicular to the central axis. A watertight communication connection is made above 30.

  Next, the punching cutter 32 is moved by the stroke 33 that the punching blade 32a moves forward and backward so as to pass through the entire cross section of the existing water pipe 1 while the on-off valve 30 is opened and the drilling cutter 32 is rotated. Move down. By rotating and lowering the drilling cutter 32, the existing water pipe 1 is gradually cut downward from the outer peripheral surface of the upper surface of the existing water pipe 1 at the two cut surfaces between the diameters of the bottom edge of the drilling cutter 32. The existing water pipe 1 is cut at two cut surfaces at a point where the perforated blade 32a is lowered so as to pass through the entire cross section of the existing water pipe 1, and the existing water pipe between the two cut surfaces is cut. The piece 1 ′ is cut off from the existing water pipe 1.

  In the above-described cutting operation of the existing water pipe 1, the existing water pipe 1 is in an undisrupted water state, and therefore, the existing water pipe 1 is filled with water pressure, and in the cutting operation by the drilling cutter 32, the center drill 32 b When the fluid reaches the inside of the existing water pipe 1 from the outer peripheral surface of the upper surface of the existing water pipe 1, the fluid inside the existing water pipe 1 leaks out of the pipe, and the fuselage is connected to the inner space and the upper side of the housing 10. The inside of the new water pipe 3 that is connected to the side opening B and the inner space of the continuous water flow path forming device 2 that is mounted on the downstream side is filled. However, as shown in FIG. 1 (a), the two continuous water flow path forming devices 2 and the new water pipe 3 are connected in a watertight manner, so that the fluid leaking from the existing water pipe 1 is constantly It does not leak out of the water flow path forming device 2 and the new water pipe 3. Therefore, the cutting operation can be performed while the fluid in the existing water pipe 1 remains in an undisrupted state. Further, this cutting operation is performed while opening the drain port 13 shown in FIG. 9 and discharging the chips generated when the existing water pipe 1 is cut to the outside.

  In the upstream continuous water flow path forming device 2, after the cutting operation of the existing water pipe 1, the cutting cutter 32 disposed inside the fuselage 31 and the existing cut-off device hooked on the hooking piece 32 c of the center drill 32 b. The water pipe piece 1 'is carried out to the outside.

  Next, also in the continuous water flow path forming device 2 disposed on the downstream side, the same operation as described above of the punching cutter 32 disposed in the body 31 having the same specifications above the on-off valve 30 is performed. Thus, the existing water pipe 1 is cut and the perforating cutter 32 and the existing water pipe piece 1 'are carried out to the outside.

  At the end of the operation of cutting the existing water pipe 1 and carrying out the existing water pipe piece 1 'in the continuous water flow path forming device 2 arranged on the upstream side and the downstream side, the piping path of the fluid pipe is as shown in FIG. The flow path of the fluid in the fluid pipe is the same as that before the cutting operation, and the downstream flow is bypassed in the upstream water flow path forming device 2 by the path flowing down in the existing water pipe 1. A flow that flows down in the water pipe 3 and joins and flows back into the existing water pipe 1 in the downstream continuous water flow path forming device 2 becomes a coexisting state.

  Subsequently, inside the continuous water flow path forming device 2 on the downstream side, the cut generated in the cut surface of the existing water pipe 1 when cutting the existing water pipe 1 and remaining in the housing 10 without being discharged from the drain port 13. The powder is discharged from the upper opening U by a discharge device (not shown).

  Next, in the existing water pipe forming apparatus 2 on the downstream side after discharging the existing water pipe piece 1 ′ and the chips, as shown in FIG. 10, the body 31 in which the partition body 4 and the insertion machine 34 are disposed. After 'is connected to the on-off valve 30 in a watertight manner, the on-off valve 30 is opened, and the partition body 4 is pressed by the insertion machine 34 from above to below.

  Here, as shown in FIG. 2A, the partition 4 is integrally formed with a partition plate 6 provided in a vertical direction for switching a fluid flow path inside the existing water pipe 1 and an upper end portion of the partition plate 6. A sealing material 8a provided on the peripheral surface of the upper lid 5 is press-contacted with a step 19 provided on the inner surface of the housing 10 in a watertight manner. It is formed to do. Similarly, a sealing material 8b including a sealing material 81b provided on both side surfaces of the partition plate 6 and a sealing material 82b provided on the bottom surface is provided on the inner side surface of the housing 10 at the installation position of the partition body 4. The side surface step portion 15 and the bottom surface step portion 16 are formed in watertight pressure contact.

  As shown in FIG. 10, when the partition body 4 is pressed downward by the insertion machine 34 and installed inside the housing 10 shown in FIG. 5B, the fluid flowing down from the upstream side of the opening A is flown. The flow path is changed substantially orthogonal to the horizontal direction by the partition 4 and is formed so as to flow out from the opening B to the downstream side. In addition, the flow path switching surface 7 facing the falling fluid is formed with a concave curved surface having a concave portion that is curved toward the downstream direction in which the fluid in the pipe flows from upstream to downstream at a position after being installed in the housing 10. For this reason, the flow of the fluid flowing down in the pipe is hardly disturbed. Therefore, the load due to the turbulence of the flowing fluid to the partition 4 is small, and the sealing performance of the partition 4 can be maintained for a long time.

  Next, in the upstream continuous water flow path forming apparatus 2, similarly, after discharging the existing water pipe piece 1 ′ and chips, the partition body 4 is disposed inside the continuous water flow path forming apparatus 2.

  When the partition body 4 is disposed in the upstream and downstream continuous water flow path forming devices 2, the pipe path of the water pipe is as shown in FIG. 1 (c), and the flow of fluid in the existing water pipe 1 The path is such that the flowing-down fluid bypasses in the upstream continuous water flow path forming device 2, flows down in the new water pipe 3, and flows back into the existing water pipe 1 in the downstream continuous water flow path forming apparatus 2. Become. Accordingly, since the fluid does not flow down into the pipe of the specific area E that is the existing flow path, it is possible to remove or repair the pipe portion located in the specific area E.

  Next, each part of the continuous water flow path forming device 2 will be described in detail.

  In the continuous water flow path forming device 2 at the installation position of the partition body 4, as shown in FIG. 4, the contact surface with the bottom surface of the partition plate 6 is formed at a slightly higher step, and is already installed by the perforating cutter 32. When cutting the water pipe 1, the chips generated and dropped from the cut surface of the existing water pipe 1 and adhering to the contact surface of the bottom surface step portion 16 flow down in the existing water pipe 1 or in a cylindrical shape. Due to the turbulent water flow generated by the rotating operation of the perforating cutter 32, the vicinity of the inner bottom surface of the housing 10 is irregularly swung and falls from the contact surface of the bottom stepped portion 16. When installing the sealing member 82, the sealing material 82b provided on the bottom surface of the partition plate 6 is pressed against the bottom surface step portion 16 without pinching the chips, so that the sealing performance can be improved. As shown in FIG. 11 (a), the width of the upper surface of the bottom step 16 is suppressed to a narrow size necessary to accommodate the width of the sealing material 82b. It becomes difficult for chips to adhere to the upper surface of 16.

  Further, as shown in FIG. 5A, a sealing material 8b including sealing materials 81b and 82b integrally connected to both side surfaces and a bottom surface of the partition plate 6 by a convex R surface is provided. Also on the inner surface, the side surface step portion 15 and the bottom surface step portion 16 are integrally formed to be continuous with a concave R surface.

  As a result, as shown in FIG. 5B, the lower end corners of the partition plate 4 and the both ends of the bottom step 16 of the casing 10 abut at the position where the partition 4 is installed inside the casing 10. Since the surfaces coincide with each other on the corresponding R surfaces, it is possible to gradually load the load applied to the bottom sealing material 82b to both side sealing materials 81b when the partition 4 is installed inside the housing 10. Thus, the lateral deformation of the sealing material 82b on the bottom surface can be prevented, and the sealing effect on the contact surface can be maintained.

  Further, as shown in FIG. 5A, the partition plate 6 has a narrow taper shape from the upper part to the lower part, and the inner side surface of the housing 10 corresponds to the change in the width dimension of the partition plate 6. Further, the side step 15 inside the housing 10 is formed so as to become narrower from the top to the bottom.

  Therefore, as shown in FIG. 5A, when the partition body 4 is installed, the sealing material 81 b provided on both side surfaces of the partition plate 6 serves as the inner surface of the housing 10 during the lowering operation of the partition body 4. Since the sealing material 8b provided on both side surfaces and the bottom surface of the partition plate 6 abuts the inner surface of the housing 10 almost simultaneously at the installation position, the fluid due to the deformation of the sealing material 8b Leakage can be prevented.

  Further, when the partition body 4 is installed inside the housing 10, the seal material 8 b provided on both side surfaces and the bottom surface of the partition plate 6 contacts the inner surface of the housing 10, and then receives a downward pressing force. Since the load applied to the sealing material 82b on the bottom surface of the partition plate 6 can be gradually applied to the sealing material 81b on both side surfaces via the R surfaces at both ends of the bottom surface, the lateral direction of the sealing material 82b on the bottom surface Can be prevented, and the sealing effect on the contact surface can be maintained.

  In addition, since both side surfaces of the partition plate 6 are tapered in front view, the weight of the partition body 4 is the sealing material on the bottom surface of the partition plate 6 at the installation position in the housing 10 of the partition body 4. Since the pressing force is evenly applied not only to 82b but also to the sealing material 81b provided on both side surfaces and deformation of the bottom sealing material 82b can be suppressed, the sealing effect can be further increased.

  Further, as shown in FIG. 4, the contact surface on the inner surface of the housing 10 of the partition plate 6 is formed as a thick stepped portion slightly inward from the other inner surfaces, Compared with the case in which the inner surface of the housing 10 is used as the contact surface of the sealing material 8b described above, the contact surface that contacts the both side surfaces of the partition plate 6 can be secured only by processing the side surface step portion 15, so that the process formation is performed. Is simple and inexpensive.

  Further, as shown in FIG. 4, the contact surfaces of the inner surface and the inner bottom surface of the housing 10 with the partition plate 6 form side step portions 15 and a bottom step portion 16 on the inner side of the housing 10. For this reason, the size and shape of the partition 4 can be kept small inside the housing 10 larger than the outer peripheral surface of the existing water pipe 1, and the labor for installing the partition 4 can be reduced.

  Moreover, as shown in FIG. 4, the continuous water flow path forming device 2 of the present invention has a structure that is divided into two vertically at a substantially central height, and a method for joining the casing 10 having a divided structure will be described below. To do. The housing 10 has a structure in which the upper housing 11 and the lower housing 12 are joined by welding from the outer surface side, and as shown in FIG. 12 has a groove portion 18 on the outer surface.

  As shown in FIG. 6B, a part of the melted and solidified welding material is formed as a build-up portion on the inner side surface of the housing 10 by welding from the outer side surface. Therefore, in order to maintain the above-described sealing effect, in order to smooth the contact surface with the partition plate 6 on the inner side surface of the housing 10, the contact portion with the partition plate 6 (polishing) of the built-up portion. The surface K is subjected to surface treatment by polishing.

  In the case of joining by the conventional welding process, since there is no side step portion inside the casing, the position of contact between the partition plate and the inner side face of the casing cannot be specified, and the polishing location cannot be limited. Therefore, there is a problem that a wide surface must be polished in advance, and the casing body must be thick in order to secure a polishing margin.

  In the case of the present embodiment, only the contact surface with the partition plate 6 on the inner side surface of the housing 10 is formed on the thick side stepped portion 15, so that as shown in FIG. The position of the contact point (polishing point K) with the plate 6 can be easily specified, and since it is formed as a thick step on the inner surface, a polishing margin can be secured. Therefore, it is not necessary to polish a wide surface, and it is not necessary to make the casing 10 main body thick.

  As shown in FIGS. 5 and 7, the continuous water flow path forming device 2 according to the present invention is provided with a partition 4 on the inner surface of a housing 10 composed of an upper housing 11 and a lower housing 12. In this state, guide pieces 20, 21, 20 ′, and 21 ′ are fixed to two positions on the upper and lower sides that sandwich the partition plate 6 from the front and the back. As shown in FIG. 5A, the guide pieces 20 ′, 21 ′ and the guide pieces 20, 21 (not shown) guide the partition body 4 while being in sliding contact with the front and back surfaces of the partition plate 6. The displacement of the contact position between the side surface of the partition plate 6 and the contact surface of the side surface step portion 15 that occurs when moving downward from the upper side toward the installation position in the housing 10 can be prevented. In this case, the installation work of the partition 4 is facilitated.

  Further, as shown in FIG. 5 (a), even when the abutment position shifts due to the load of the fluid flowing down in the pipe at the midpoint where the partition 4 is lowered from above, The pair of front and back guide pieces 20 and 21 of the partition plate 6 which are fixed are formed in an upwardly tapered shape, so that the insertion work is easy at the initial stage of insertion of the partition plate 6, and the partition body 4 is a pair of front and back guide pieces in the upper part. Between the pieces 20 and 21, the lowering operation is performed while correcting the initial deviation.

  Further, a pair of front and back guide pieces 20 'and 21' of the partition plate 6 fixed to the lower part of the inner side surface of the housing 10 are formed to face each other substantially in parallel, and the upper ends of these guide pieces 20 'and 21' are formed. Since the notch portion is formed so that the portion 24 is expanded upward, as shown in FIG. 5 (a), the partition body 4 is lowered while the displacement is corrected toward the predetermined installation position. When continuing, the bottom end portion of the partition plate 6 is guided between the pair of front and back guide pieces 20 ′, 21 ′ without contacting the upper end portion 24 of the lower guide piece, and the upper guide pieces 20, 21 After the correction of the shift in FIG. 5, the shift is further corrected, and the partition 4 is accurately installed at a predetermined installation position as shown in FIG. 5B without being inclined.

  Further, as shown in FIG. 7B, when the partition body 4 is installed at a predetermined position inside the housing 10, among the guide pieces arranged facing the position where the partition plate 6 is sandwiched from the front and back sides. The upper and lower front guide pieces 20 s and 21 s ′ disposed at positions overlapping with a part of the fluid flow path are formed shorter in the vertical direction than the other guide pieces 20 and 20 ′. It is designed to suppress the influence of water pressure in the pipe.

  FIG. 5B shows a state in which the partition 4 is installed at a predetermined position inside the housing 10, and the sealing materials 8 a and 8 b provided on the side and bottom surfaces of the partition plate 6 and the peripheral surface of the upper lid portion 5. Further, the side surface step portion 15, the bottom surface step portion 16, and the step portion 19 provided on the inner side surface and the inner bottom surface of the housing 10 are in close contact with each other in a watertight manner, and the flow of the in-pipe fluid is blocked by the partition plate 6.

  In this case, when the entire pipe is viewed in a plan view, as shown in FIG. 1 (c), the existing pipe of the existing water pipe 1 is blocked inside the continuous water flow path forming device 2, and the pipe blocked from the upstream is opened. It will be connected to the newly established water pipe 3 through the part B.

  Further, as shown in FIG. 8, four steady rest pins 22 are arranged on the inner surface of the housing 10 at predetermined intervals at a height position where the partition 4 is in contact with the lower surface of the upper lid portion 5. Yes. Further, six fixed plug screws 23 screwed from the outer surface to the inner surface of the housing 10 are disposed at predetermined intervals at a height position where the fixing member 4 is in contact with the upper surface of the upper lid portion 5. Has been.

  In the installation position of the partition 4 shown in FIG. 5 (b), the six fixed plug screws 23 are screwed from the outer surface of the housing 10, so that the distal end portion of the fixed plug screw 23 becomes the upper surface of the upper lid portion 5. Since it enters toward the center of the inside of the housing 10 while sliding, the partition 4 can be fixed in a state where it is pressed downward. In this case, since the four steady rest pins 22 having the same height position receive the downward pressing force of the partition body 4 as stoppers, the sealing material is subjected to an unreasonable total load while maintaining the partition body 4 in the horizontal direction. Can be pressed and fixed downward.

  Therefore, since the sealing material 8b provided on the side surface and the bottom surface of the partition plate 6 is evenly loaded downward, water tightness can be ensured.

  Thus, after the partition 4 is installed, even when the flow path switching surface 7 facing the flowing fluid in the pipe receives a fluid force, the steady rest pin 22 exerts the fluid force especially on the upper portion of the partition 4. In the same manner, the partition 4 is fixed and held. Similarly, in the lower part of the partition 4, the lower guide pieces 20 ′ and 21 ′ disposed at the positions sandwiching the partition plate 6 receive the fluid force to ensure the partition 4. Hold on to.

  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 not departing from the gist of the present invention are included in the present invention. It is.

  For example, in the above embodiment, as shown in FIG. 1A, after installing the continuous water flow path forming device 2 across the specific area E of the flow path of the existing water pipe 1, the upstream continuous water flow path formation is performed. Although the existing water pipe 1 inside the apparatus 2 was cut and then the existing water pipe 1 on the downstream side was cut, the order of cutting the existing water pipe 1 may be performed from either the upstream side or the downstream side.

  Moreover, in the said Example, after cut | disconnecting the existing water pipe 1 inside the upstream and downstream infinite water flow path formation apparatus 2 on both sides of the specific area E, it partitions in the inside of the downstream continuous water flow path formation apparatus 2 Although the body 4 was installed and then the upstream partition was installed, the order of installation of the partition 4 may be performed from either the upstream side or the downstream side.

  Further, in the above embodiment, the side step 15 in the housing 10 is formed so as to become narrower from the top to the bottom, but the side step 15 is not formed, and The inner side surface may be formed so as to become narrower from the upper part to the lower part.

  Further, in the above embodiment, the number of the steady rest pins is four and the number of the fixing plug screws is six. However, the number is not necessarily limited to these numbers, and the purpose of fixing and holding the partition body 4 is as follows. Any number is possible as long as it can be achieved.

  In the above embodiment, the pipe fluid of the existing water pipe 1 is clean water, but the pipe fluid may be sewage or gas.

  Further, in the above embodiment, the cutting means for the existing water pipe 1 inside the continuous water flow path forming device 2 is the hollow cylindrical drilling cutter 32, but if the existing water pipe 1 can be cut, the cutting means will be drilled. The cutter 32 is not limited to this.

  Moreover, in the said Example, although the upper surface of the bottom face step part 16 is horizontal as FIG. 11 (a) shows, if a sealing performance can be maintained, for example, as shown in FIG. The upper surface of the part 16 ′ may be arranged in a downward gradient toward the upstream side of the existing water pipe 1. Due to the water flow in the pipe of the existing water pipe 1 and the gradient of the upper surface of the bottom surface step portion 16 ′, the chips are more difficult to adhere to the upper surface of the bottom surface step portion 16 ′.

  Moreover, in the said Example, as FIG. 4 showed, joining with the upper housing | casing 11 and the lower housing | casing 12 was performed by welding, However, If watertightness can be maintained, a joining method will not be restricted to welding. . For example, a flange may be provided at a joint portion of each housing, a sealing material such as rubber packing may be sandwiched between the joint surfaces, and the joints may be joined with bolts, nuts, or the like.

  Moreover, in the said Example, as FIG. 7 shows, although the pair of guide pieces 20 and 21 were formed in the position which pinches | interposes the side step parts 15 and 15 on the right and left in the housing | casing 10, If the guide position can be accurately guided, the position where the guide piece is formed is not limited to this position. For example, as shown in FIG. 12, the guide pieces 21, 21 ′ support only the downstream side surface of the partition body 4. It may be formed at a position.

It is a top view which shows the whole image of piping which equip | installed the continuous water flow path formation apparatus to the existing water pipe 1 in 1st Embodiment of this invention, and connected the new water pipe 3 in communication. (A) is a plan view showing a state in which the continuous water channel forming device is attached to the existing water pipe 1 and the new water pipe 3 is connected in communication and the flow direction of the fluid in the pipe, and (b) is a continuous water channel. It is the top view which showed the state which cut | disconnected the existing water pipe 1 inside a formation apparatus, and the flow direction of the fluid in a pipe | tube, (c) is the partition 4 in an unrestricted water flow path formation apparatus, after cutting the existing water pipe 1 It is the top view which showed the state which installed and the flow direction of the fluid in a pipe | tube. (A) is a perspective view which shows the partition body 4 in this invention, (b) is a perspective view which shows the whole image of a continuous water flow path formation apparatus. It is a top view which shows the whole continuous water flow path formation apparatus. It is ff sectional drawing of the housing | casing of the continuous water flow path formation apparatus which showed the step part integrally provided by the inner surface and inner bottom face of the housing | casing. (A) is the longitudinal cross-sectional view of the housing | casing of a continuous water flow path formation apparatus in the middle point in which the partition body 4 descend | falls toward the installation position from the upper direction of a housing | casing, (b) is the partition body 4 It is a longitudinal cross-sectional view of the housing | casing of a continuous water flow path formation apparatus in the point installed in the installation position. FIG. 4 is an enlarged cross-sectional view of aa and cc in FIG. 3 showing a butting portion for joining the upper housing 11 and the lower housing 12 which are divided into upper and lower parts by welding, and FIG. It is the expanded sectional view which showed the butt | matching part, (b) is the expanded sectional view which showed the butt | matching part after welding processing, (c) is the expanded sectional view which showed the butt | matching part after grinding. It is the figure which showed the guide piece which guides the partition body 4 to the installation position of the inner surface of a housing | casing, (a) is the top view which showed the guide piece in a housing | casing, (b) is dd in (a). It is sectional drawing, (c) is cc sectional drawing in (a). FIG. 6 is a side sectional view showing a steady pin 22 at an installation position on an inner side surface of a housing of a partition body 4. It is the schematic which showed the cutter for perforation which cut | disconnects the pipe | tube inside the continuous water flow path formation apparatus 2. FIG. It is the schematic which showed the insertion machine which installs the partition body 4 in the continuous water flow path formation apparatus 2. FIG. It is ee sectional drawing of FIG.5 (b) in the state in which the partition body 4 was installed in the indefinite water flow path formation apparatus 2. FIG. It is the figure which showed the modification of the guide piece which guides the partition body to the installation position of the housing | casing inner surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing water pipe 1 'Existing water pipe piece 2 Unidentified water flow path formation apparatus 3 New water pipe 4 Partition 5 Upper cover part 6 Partition plate 7 Flow path switching surface 8a Sealing material (upper cover peripheral surface)
8b Seal material (partition plate peripheral surface)
81b Sealing material (partition plate side)
82b Sealing material (partition plate bottom)
8c Sealing material (side openings A, B inner peripheral surface)
DESCRIPTION OF SYMBOLS 10 Housing | casing 11 Upper housing | casing 12 Lower housing | casing 13 Drain outlet 14 Rib 15 Side surface step part 16 Bottom surface step part 16 'Bottom surface step part (upper surface gradient)
17 Flange 17 'Push ring 18 Groove part 19 Step part (for upper cover part)
20 Upper guide piece (front side)
21 Upper guide piece (back side)
20 'Lower guide piece (front side)
21 'Lower guide piece (back side)
20s Upper guide piece (front side) short piece 20s 'Lower guide piece (front side) short piece 22 Stabilizing pin 23 Fixed plug screw 24 Lower guide piece upper end 30 Open / close valve 31 Body 31' Body 32 Drilling cutter 32a Drilling blade 32b Center drill 32c Hanging piece 33 Stroke 34 Inserting machine A Side opening (upstream side of existing water pipe)
A 'Side opening (downstream side of existing water pipe)
B side opening (new water pipe side)
C Center axis D Center axis E Specific area K Polishing location U Upper opening

Claims (1)

The outer peripheral surface of the existing fluid pipe is sealed with a casing capable of securing at least three directions of flow paths, the existing fluid pipe is cut in an undisturbed state of water, and the partition is installed by the insertion means installed inside the casing. And a continuous water flow path forming device for an existing fluid pipe that forms another flow path,
The partition includes a partition plate that blocks at least one flow path of the fluid in the housing, and guides to the installation position inside the housing by sandwiching both front and back sides of the partition plate on the inner surface of the housing. A pair of front and back guide pieces are provided, and the guide pieces are divided into at least two parts in the vertical direction, and the pair of front and back guide pieces in the upper part is formed in an upwardly opening tapered shape, and the pair of front and back guide pieces in the lower part. Is provided in a substantially parallel manner, and the upper end portion of the guide piece is formed in a notch portion that is widened upward .

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