JP5730589B2 - Pipe member, fluid transfer pipe and fluid transfer unit - Google Patents

Description

  The present invention relates to a pipe member, a fluid transfer pipe, and a fluid transfer unit using these.

  2. Description of the Related Art Conventionally, a membrane unit having a membrane module that sucks from the upper side of a hollow fiber membrane that is immersed in the processing tank liquid and separates the processing liquid in the processing tank into a solid-liquid separation is known. For example, in the membrane unit described in Patent Document 1, a plurality of membrane modules, a header tube that collects the filtrate sucked from the membrane modules, and a plurality of membrane modules are supported. And a frame (support) to which the header pipe is fixed. In this membrane unit, the pipe members constituting the header pipe are fixed apart from each other along the long side of the upper frame member of the frame, and a flexible hose is provided between the mouthpiece of the membrane module and the header pipe. It is connected.

JP 2009-28716 A

  By the way, in the membrane unit as described above, further downsizing is required. As one of the methods, it is conceivable to use a header pipe made of a pipe member in which pipes are arranged side by side, instead of the conventional header pipe in which the pipe members are arranged apart from each other. With regard to such a header pipe fixing method, the conventional pipe member constituting the header pipe is fixed to the frame by a U-shaped fixing member. In the header pipe made of the above, the fixing to the frame becomes unstable by the conventional fixing method. Therefore, it is necessary to fix the frame and the header pipe firmly by bolting.

  Here, the frame for supporting the membrane module is preferably formed of a metal member in order to prevent deformation and ensure strength, and the tube member constituting the header tube is easy to form. It is preferable to form with a thermoplastic resin. As described above, when the frame and the header tube are formed of different materials, the following problems occur. That is, since the materials of the frame and the header pipe are different from each other, the linear expansion coefficient (thermal expansion coefficient / coefficient) whose length changes in response to an increase in temperature is different. Therefore, when the frame and the header pipe are immersed in the treated water in a state where the frame and the header pipe are fixed by bolt fastening, thermal stress is generated due to a difference in coefficient of linear expansion due to temperature change. This thermal stress has a problem of causing defects such as cracks in the tube member.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a pipe member, a fluid transfer pipe, and a fluid transfer unit that can prevent the occurrence of problems due to thermal stress.

  In order to solve the above-described problems, a pipe member according to the present invention is a thermoplastic resin that is attached in contact with a support that supports a fluid transfer means and that constitutes at least a part of a fluid transfer pipe connected to the fluid transfer means. A plurality of tubes that are juxtaposed to each other and form a fluid flow path, and a contact portion that contacts the support, and the contact portion includes the contact portion and the support. A through-hole through which a fixing means for fixing is inserted is provided, and the through-hole is a long hole extending along the axial direction of the tube.

  In this tube member, a through hole through which a fixing means for fixing the contact portion and the support is inserted is a long hole extending in the axial direction of the tube. Thereby, even when the tube member made of thermoplastic resin is fixed to a support made of a different material such as a metal member and is linearly expanded (thermally expanded) when immersed in the processing liquid, The tube member can be slid in the axial direction by the amount linearly expanded by the long hole extending in the axial direction. Therefore, thermal stress can be relaxed, and as a result, defects such as cracks can be prevented.

  Each of the plurality of tubes is provided with a plurality of tubular connection portions that communicate with the flow path and are connected to the fluid transfer means, and the connection portions are provided at equal intervals in the axial direction of the tubes, It is preferable that they are provided at equal intervals between adjacent tubes. According to such a configuration, the pitch intervals of the fluid transfer means connected to the connection portion can be positioned at equal intervals. Further, since the fluid transfer means are connected at equal intervals, the filtration pressure of each fluid transfer means can be made uniform, and the filtration performance of the filtration membrane can be made uniform.

  It is preferable that the rib part is provided in the outer peripheral surface of a some pipe | tube. In this way, by providing the reinforcing rib portion on the outer peripheral surface of the pipe, it is possible to prevent deformation due to fluctuations in the internal pressure of the pipe.

  It is preferable to further include a communication portion that communicates with all the flow paths of the plurality of tubes. By connecting a water absorption device to this communication part and performing water absorption by the water absorption device, it can be configured to suck up the treated water in the treatment tank via the fluid transfer means.

  A flange portion is provided around the opening on the tip side of the communication portion, and a through hole through which a fixing means for fixing the flange portion is inserted is formed in the flange portion. It is preferable that it is a long hole extended along the radial direction of a communicating part. The companion flange portion of the water absorbing device that is disposed oppositely to the flange portion and is fixed varies in size (outer diameter, bolt center diameter) according to the industrial standards of each country other than the ISO standard. For this reason, when the flange portions are brought into contact with each other, there is a problem that the position of the through hole through which the bolt is inserted does not match, and in order to solve this, it is necessary to take measures such as arranging an intermediate member or the like in between. . Therefore, by making the through hole of the flange portion a long hole, it becomes possible to correspond to the through hole of various standard phase flanges.

  Each of the plurality of pipes is formed with an opening for communicating the pipes in a portion communicating with the communicating portion, and each opening has a height of the central axis of the tube from a position corresponding to the inner surface of the communicating portion in the pipe. Preferably, the plurality of tubes are connected by a connecting member at a height position of the central axis of the tube in the opening. According to such a configuration, the filtrate of the fluid transfer means connected to the tube member can be collected efficiently. Further, since the opening is formed up to the height position of the central axis of the pipe member and the pipes are connected by the connecting member at this height position, a rib structure is formed at the portion communicating with the communication portion. Therefore, strength can be ensured.

  The fluid transfer pipe according to the present invention is a fluid transfer pipe that is attached to a support that supports the fluid transfer means and is connected to the fluid transfer means, and includes a first pipe member made of a thermoplastic resin, and a first pipe member. Two pipe members are connected to each other, and the first pipe member includes a plurality of pipes that are juxtaposed to each other to form a fluid flow path, and an abutting portion that comes into contact with the support body. The member includes a plurality of tubes that are juxtaposed with each other and that form a fluid flow path, a contact portion that contacts the support, and a communication portion that communicates with all of the flow paths of the plurality of tubes. The contact portion of the member and the second tube member is provided with a through hole through which a fixing means for fixing the contact portion and the support is inserted, and the through hole extends along the axial direction of the tube. It is a long hole extending.

  In this fluid transfer pipe, in the first and second pipe members, a through hole through which a fixing means for fixing the contact portion and the support is inserted is a long hole extending in the axial direction of the pipe. Thereby, even when the tube member made of thermoplastic resin is fixed to a support made of a different material such as a metal member and is linearly expanded (thermally expanded) when immersed in the processing liquid, The tube member can be slid in the axial direction by the amount linearly expanded by the long hole extending in the axial direction. Therefore, thermal stress can be relaxed, and as a result, defects such as cracks can be prevented.

  A fluid transfer unit according to the present invention includes the above-described fluid transfer pipe, a fluid transfer unit, and a support that supports the fluid transfer unit. In this fluid transfer unit, in the first and second pipe members of the above-described fluid transfer pipe, a through hole through which a fixing means for fixing the contact portion and the support is inserted is an elongated hole extending in the axial direction of the pipe. It has become. Thereby, even when the tube member made of thermoplastic resin is fixed to a support made of a different material such as a metal member and is linearly expanded (thermally expanded) when immersed in the processing liquid, The tube member can be slid in the axial direction by the amount linearly expanded by the long hole extending in the axial direction. Therefore, thermal stress can be relaxed, and as a result, defects such as cracks can be prevented.

  The fluid transfer pipe may be a pipe that transfers a fluid. Here, the fluid is a general name for a liquid, gas, or gas-liquid mixture. The fluid transfer means is not limited as long as it can transfer the fluid, and may be a pipe for transferring the fluid. However, a membrane module is preferable, and a hollow fiber membrane module is more preferable. The fluid transfer unit may be composed of the fluid transfer pipe and the fluid transfer means, and there is no limitation on the fluid to be transferred, but the fluid transfer means is a membrane unit comprising a membrane module or a hollow fiber membrane module. Preferably there is.

  According to the present invention, problems due to thermal stress can be prevented.

It is a figure showing an outline of a membrane unit provided with a header pipe constituted by a header pipe unit concerning one embodiment of the present invention. It is an upper perspective view of a 1st header pipe unit. FIG. 3 is a lower perspective view of the first header pipe unit shown in FIG. 2. It is the figure which looked at the 1st header pipe unit shown in Drawing 2 from the bottom. It is the figure which looked at the 1st header pipe unit shown in Drawing 2 from the front. It is an upper perspective view of the 2nd header pipe unit. It is a downward perspective view of the 2nd header pipe unit shown in FIG. It is the figure which looked at the 2nd header pipe unit shown in Drawing 6 from the top. It is sectional drawing of the 2nd header pipe unit shown in FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

  FIG. 1 is a diagram showing an outline of a membrane unit including a header pipe constituted by a header pipe unit according to an embodiment of the present invention. A membrane unit (fluid transfer unit) 1 shown in FIG. 1 has a function of removing suspended substances such as sludge of treated water by being immersed in treated water in a treatment tank, and a plurality of purification units for purifying treated water. The hollow fiber membrane module 2, a frame (support) 3 that supports the hollow fiber hollow fiber membrane module 2, and fixed in contact with the frame 3, provided above the hollow fiber membrane module (fluid transfer means) 2. And a header pipe (fluid transfer pipe) 4 for sucking out the filtered water of the hollow fiber membrane module 2. Although not shown in the drawings, the membrane unit 1 is provided with an under support provided below the hollow fiber membrane module 2 to support the hollow fiber membrane module 2 and an air diffuser that diffuses into the hollow fiber membrane module 2. It has been.

  The frame 3 is formed of a metal member, and is formed into a rectangular hollow upper frame member 31 and a lower lower frame of the same shape as the upper frame member 31 disposed below the upper frame member 31. It is comprised from the side frame-shaped member 32 and the four hollow pillar members 33 which connect the upper frame-shaped member 31 and the lower frame-shaped member 32 mutually. Each of the upper frame member 31 and the lower frame member 32 having a rectangular frame shape has a rectangular cross section, and the internal spaces of the sides communicate with each other. The upper frame-shaped member 31 and the lower frame-shaped member 32 are arranged to face each other so that the four sides overlap each other when viewed from above, and the column members 33 are arranged at the four corners of the upper frame-shaped member 31 and the lower frame-shaped member 32. The four corners are connected to each other.

  The internal space of the upper frame member 31 and the internal space of the lower frame member 32 are communicated with each other via the internal space of the column member 33. Further, a pipe-shaped joint portion 34 communicating with the internal space of the upper frame member 31 is formed on the outer peripheral surface on one short side of the upper frame member 31. A gas supply device (not shown) is connected to the joint portion 34, and the supplied gas is an internal space of the upper frame member 31, an internal space of the column member 33, and an entire internal space of the lower frame member 32. To spread. In addition, in order to cope with the case where the treated water is seawater, the members constituting the frame 3 have seawater-resistant, alkali-resistant, and acid-resistant FRP ( It is preferable to use resin coating such as fiber reinforced plastic), painting with paint, or super stainless steel.

  The header pipe 4 is attached to the upper surface of the upper frame-shaped member 31 of the frame 3 in contact therewith. The header tube 4 has a length that is substantially the same as the length of the long side of the upper frame member 31, and the total width is substantially the same as the length of the short side of the upper frame member 31. Yes. The header pipe 4 is composed of five first header pipe units (first pipe members) 41a, 41b, 41c, 41d, 41e, and one second header pipe unit (second pipe member) 41f. Yes. The first and second header pipe units 41a to 41f are formed by resin molding. As the resin material, for example, a thermoplastic resin such as ABS, hard vinyl chloride, deformed polyphenylene ether resin, or polycarbonate resin is used.

  The first and second header pipe units 41f constituting the header pipe 4 will be described with reference to FIGS. First, the first header pipe units 41a to 41e will be described. 2 is an upper perspective view of the first header pipe unit, and FIG. 3 is a lower perspective view of the first header pipe unit shown in FIG. 4 is a view of the first header pipe unit shown in FIG. 2 as viewed from below, and FIG. 5 is a view of the first header pipe unit shown in FIG. 2 as seen from the front. The first header pipe units 41a to 41e all have the same configuration. In the following description, the first header pipe unit 41a will be specifically described.

  As shown in FIGS. 2 to 5, the first header pipe unit 41 a includes two pipes 42, 43, a connecting portion 45 that connects the two pipes 42, 43, and a contact that contacts the frame 3. Part 46. The pipe (tube) 42 and the pipe 43 are provided so as to be arranged substantially in parallel. The pipe 42 and the pipe 43 independently form flow paths F1 and F2 of filtrate water sucked out from the hollow fiber membrane module 2. The diameter of the opening at one end (the right side in FIG. 2) of the pipes 42 and 43 is larger than the diameter of the opening at the other end (the left side in FIG. 2) of the pipes 42 and 43. With such a configuration, in the header pipe 4, for example, the other end of the pipes 42, 43 of the first header pipe unit 41a is inserted into one end of the pipes 42, 43 of the first header pipe unit 41b. 1 header pipe unit 41a, 41b is connected.

  The connection part 45 has the pipe 42 and the pipe 43 juxtaposed in parallel with each other. The connection part 45 is a plate-like member, and has an upper connection part 45a and a lower connection part 45b. The upper connecting portion 45 a and the lower connecting portion 45 b connect the pipe 42 and the pipe 43 on both end sides in the axial direction (longitudinal direction) of the pipes 42 and 43. On one end side of the pipes 42 and 43 (on the side where the diameter of the opening is large), the upper connecting portion 45 a and the lower connecting portion 45 b are formed along a part of the outer peripheral surface of the pipes 42 and 43. In addition, on the other end side of the pipes 42 and 43 (the side where the diameter of the opening is small), the upper connecting portion 45a and the lower connecting portion 45b are formed continuously, and the entire outer peripheral surface of the pipes 42 and 43 is formed. It is formed along the circumference. A plurality of rib portions 47 for reinforcement are provided between the pair of upper connecting portions 45a over the outer peripheral surface of the pipe 42 and the outer peripheral surface of the pipe 43 (here, four).

  The abutting portions 46 protrude toward the outside in the direction in which the pipes 42 and 43 are arranged side by side. The end surface of the contact portion 46 is flush with the end surface of the lower connection portion 45b. The contact surface (lower surface) of the contact portion 46 with the upper frame member 31 is a flat surface. The contact portion 46 is placed and fixed on the upper surfaces of a pair of long sides facing the upper frame member 31. A plurality of (here, two) through holes 48 are formed in each contact portion 46. The through hole 48 is a hole through which a bolt (fixing means) for fixing the first header pipe unit 41a and the frame 3 is inserted. As shown in FIG. 4, the through hole 48 penetrates in the thickness direction of the contact portion 46 and is provided at a predetermined interval along the axial direction of the pipes 42 and 43. The through hole 48 is a long hole extending in the axial direction of the pipes 42 and 43. The length of the through hole 48 is, for example, about 10 to 20 mm, and the width of the through hole 48 is, for example, about 8 to 12 mm. The contact portion 46 and the lower connection portion 45b constitute a pedestal for the pipes 42 and 43.

  A rib portion 49 for reinforcement is provided between the outer peripheral surfaces of the pipes 42 and 43 and the upper surface of the contact portion 46. A plurality (three in this case) of rib portions 49 are formed at a predetermined interval between the outer peripheral surfaces of the pipes 42 and 43 and the upper surface of the contact portion 46. The end surface of the rib portion 49 is flush with the end surface of the contact portion 46.

  A connecting portion 50 is provided on the pipes 42 and 43. The connection part 50 is a hollow tube and projects downward from the contact part 46. The connecting portion 50 communicates with the flow paths F1 and F2 of the pipes 42 and 43. As shown in FIG. 4, a plurality (two in this case) of connecting portions 50 are provided in each of the pipes 42 and 43, and are arranged at a predetermined interval d1 along the axial direction of the pipes 42 and 43. Yes. In addition, the connecting portion 50 is disposed between the pipe 42 and the pipe 43 that are arranged side by side with a predetermined interval d2 along the direction in which the pipes 42 and 43 are arranged side by side. These intervals d1 and d2 are equal intervals (d1 = d2), and are set according to the installation interval of the hollow fiber membrane module 2. The expansion joint 51 shown in FIG. 1 is connected to the connection part 50, and the hollow fiber membrane module 2 is connected.

  Here, the installation interval between the hollow fiber membrane modules 2 incorporated in the frame 3 is 1.2 times or more the outer diameter of the hollow fiber membrane module 2 in consideration of the shaking in the treated water of the plurality of hollow fiber membranes. It is preferable to set it to about twice or less. For example, the pitch between the hollow fiber membrane modules 2 is preferably about 150 mm or more and 300 mm or less. When the hollow fiber membrane modules 2 are too close to each other, the adjacent hollow fiber membranes 2a may collide with each other and the hollow fiber membrane 2a may be rubbed. Moreover, since the width of the swing of the hollow fiber membrane 2a is suppressed and the effect of suppressing sludge adhesion may be impaired, the installation interval between the hollow fiber membrane modules 2 is 1. It is preferable to set it to 2 times or more, preferably about 1.5 times or more. The connection part 50 to which the hollow fiber membrane module 2 is connected is set according to the installation interval of such hollow fiber membrane modules 2.

  Next, the second header pipe unit 41f will be described. 6 is an upper perspective view of the second header pipe unit, and FIG. 7 is a lower perspective view of the second header pipe unit shown in FIG. 8 is a top view of the second header pipe unit shown in FIG. 6, and FIG. 9 is a cross-sectional view of the second header pipe unit shown in FIG.

  As shown in FIGS. 6 to 9, the second header pipe unit 41 f includes two pipes 52 and 53, a connecting portion 55 that connects the two pipes 52 and 53, and a contact that contacts the frame 3. Part 56. The pipe 52 and the pipe 53 are provided side by side substantially in parallel. The pipe 52 and the pipe 53 form flow paths F1 and F2 of filtered water sucked out from the hollow fiber membrane module 2. The diameter of the opening at one end (right side in FIG. 6) of the pipes 52 and 53 is larger than the diameter of the opening at the other end (left side in FIG. 6) of the pipes 52 and 53.

  The connection part 55 has the pipe 52 and the pipe 53 juxtaposed in parallel with each other. The connecting portion 55 is a plate-like member, and has an upper connecting portion 55a and a lower connecting portion 55b. The upper connecting portion 55a and the lower connecting portion 55b connect the pipe 52 and the pipe 53 on both end sides in the axial direction (longitudinal direction) of the pipes 52 and 53. On one end side of the pipes 52 and 53 (the side where the diameter of the opening is large), the upper connecting portion 55 a and the lower connecting portion 55 b are formed along a part of the outer peripheral surface of the pipes 52 and 53. Further, on the other end side of the pipes 52 and 53 (the side where the diameter of the opening is small), the upper connecting portion 55a and the lower connecting portion 55b are formed continuously, and the entire outer peripheral surface of the pipes 52 and 53 is formed. It is formed along the circumference.

  The abutting portions 56 project outward toward the outside in the direction in which the pipes 52 and 53 are juxtaposed. The end surface of the contact portion 56 is flush with the end surface of the lower connection portion 55b. The contact surface (lower surface) of the contact portion 56 with the upper frame member 31 is a flat surface. The contact portion 56 is placed and fixed on the upper surfaces of the pair of long sides facing the upper frame member 31. Each contact portion 56 is formed with a plurality of (here, two) through holes 58. The through hole 58 is a hole through which a bolt for fixing the second header pipe unit 41f and the frame 3 is inserted. As shown in FIGS. 6 and 7, the through hole 58 penetrates in the thickness direction of the contact portion 56 and is provided at a predetermined interval along the axial direction of the pipes 52 and 53. The through hole 58 is a long hole extending in the axial direction of the pipes 52 and 53. The length of the through hole 58 is, for example, about 10 to 20 mm, and the width of the through hole 58 is, for example, about 8 to 12 mm. The contact portion 56 and the lower connecting portion 55b constitute a pedestal for the pipes 52 and 53.

  A rib portion 59 for reinforcement is provided between the outer peripheral surfaces of the pipes 52 and 53 and the upper surface of the contact portion 56. A plurality of (here, three) rib portions 59 are formed with a predetermined interval between the outer peripheral surfaces of the pipes 52 and 53 and the upper surface of the contact portion 56. The end surface of the rib portion 59 is flush with the end surface of the contact portion 56.

  A connecting portion 60 is provided on the pipes 52 and 53. The connection portion 60 is a hollow tube and protrudes downward from the contact portion 56. The connecting portion 60 communicates with the flow paths F1 and F2 of the pipes 52 and 53. A plurality (two in this case) of connecting portions 60 are provided in each of the pipes 52 and 53, and are arranged at predetermined intervals along the axial direction of the pipes 52 and 53. The connecting portion 60 is arranged between the pipe 52 and the pipe 53 that are arranged side by side at a predetermined interval along the direction in which the pipes 52 and 53 are arranged side by side. These intervals are equal, and are set according to the installation interval of the hollow fiber membrane module 2 described above. The expansion joint 51 shown in FIG. 1 is connected to the connection part 60, and the hollow fiber membrane module 2 is connected.

  A water absorption joint (communication portion) 62 is connected to the pipe 52 and the pipe 53. The water absorption joint 62 communicates with both the pipe 52 and the pipe 53 and is provided so as to extend upward from the pipes 52 and 53. The water absorption joint 62 includes a main body portion 63 and a flange portion 64 provided around the upper end portion (front end side) of the main body portion 63. The main body portion 63 has a cylindrical shape, and the flange portion 64 protrudes from the upper end portion of the main body portion 63 in the radial direction (radial direction) of the main body portion 63 to form an annular shape.

  As shown in FIG. 9, the water absorption joint 62 is bonded and fixed by inserting a main body 63 into a cylindrical protrusion 65 formed so as to protrude upward from the pipes 52 and 53. The water absorbing joint 62 is configured together with the protruding portion 65. In each of the pipes 52 and 53, openings K1 and K2 are formed at a portion (the inner surface 65a side of the protruding portion 65) to which the water absorption joint 62 is connected. The openings K1 and K2 are formed so that the flow path F1 (pipe 52) and the flow path F2 (pipe 53) communicate with each other in the pipes 52 and 53 arranged in parallel. The openings K1 and K2 are formed so that a quarter of the circumference of the pipes 52 and 53 opens in a cross-sectional view of the pipes 52 and 53.

  Specifically, the opening K1 is formed from the upper portion of the pipe 52 (a position corresponding to the inner surface 65a of the protruding portion 65) to the height position of the central axis. The opening K2 is formed from the upper part of the pipe 53 to the height position of the central axis. Between the pipe 52 and the pipe 53, there is provided a connecting member J connected to the openings K1 and K2 of the pipe 52 and the pipe 53. The connecting member J is a central axis of the pipes 52 and 53. It is formed at the same height as the height of. With such a configuration, a rib structure is formed.

  A plurality of rib portions 66 are provided between the outer peripheral surface of the main body portion 63 and the lower surface of the flange portion 64 at predetermined intervals in the circumferential direction of the main body portion 63. The flange portion 64 is provided with a through hole 67 for fastening a bolt with a phase flange of a water absorbing device (not shown). The through-hole 67 penetrates in the thickness direction of the flange portion 64, and a plurality (eight in this case) are formed at predetermined intervals along the circumferential direction of the flange portion 64. The through hole 67 is a long hole extending along the radial direction of the main body 63. The length of the long hole of the through hole 67 is, for example, about 15 to 30 mm, and the width of the long hole of the through hole 67 is, for example, about 18 to 20 mm. The number of through holes 67 is set by the diameter of the flange portion 64 and the applied pressure.

  A concave portion 68 is provided along the axial direction (length direction) of the main body 63 at a position corresponding to the through hole 67 of the main body 63. The recess 68 has a semicircular cross section. The concave portion 68 is a portion where a part of the washer inserted between the bolt and the nut is located when the water absorbing joint 62 is connected to the water absorbing device. Thereby, the malfunction that a washer interferes with the outer peripheral surface of the main-body part 63 can be prevented. A water absorption device (not shown) is connected to the water absorption joint 62, and the header pipe 4 can suck up the treated water in the treatment tank via the expansion joint 51 and the hollow fiber membrane module 2 by performing water absorption with the water absorption device. it can.

  The header pipe 4 is configured by connecting five first header pipe units 41 a to 41 e and connecting one second header pipe unit 41 f to one end of the first header pipe 4. A sealing cap 69 is attached to one end of the pipes 52 and 53 of the second header pipe unit 41 f corresponding to one end of the header pipe 4. A sealing cap 70 is attached to the other end portion of the pipes 42 and 43 of the first header tube unit 41 e corresponding to the other end portion of the header tube 4.

  When the header pipe 4 is attached to the frame 3, the header pipe 4 is placed on the upper surface of the upper frame-shaped member 31 of the frame, and the contact portions 46 of the first header pipe units 41a to 41e and the second header pipe unit 41f. , 56 and the upper surface of the upper frame member 31 are in contact with the through holes 48, 58 of the contact portions 46, 56 of the first header pipe units 41a to 41e and the second header pipe unit 41f and the upper frame shape. A bolt is inserted into a through hole (not shown) of the member 31 and fastened.

  Here, the frame 3 is generally formed of a metal member from the viewpoint of suppressing deformation and ensuring strength, and the first and second header pipe units 41a to 41f constituting the header pipe 4 are used. Is formed of a thermoplastic resin for ease of processing. Thus, since the frame 3 and the first and second header pipe units 41a to 41f are made of different materials, they have different thermal expansion coefficients (linear expansion coefficients / coefficients), and the first and second thermoplastic pipes are made of thermoplastic resin. The second header pipe units 41 a to 41 f have a higher coefficient of thermal expansion than the frame 3. Therefore, when the membrane unit 1 in which the header pipe 4 is bolted to the frame 3 is immersed in the treated water, the first and second header pipe units 41f are linearly expanded than the frame 3, and the first and second headers are expanded. Thermal stress is applied to the tube units 41a to 41f. At this time, since the first and second header pipe units 41f are fixed to the frame 3, there is a problem that defects such as cracks occur due to thermal stress.

  Therefore, in the first and second header pipe units 41a to 41f according to the present embodiment, the through holes 48 and 58 through which the bolts are inserted are elongated holes extending along the axial direction of the pipes 42, 43, 52, and 53. . Thereby, even if thermal stress is generated in the first and second header pipe units 41f due to thermal expansion (linear expansion), the first and second long holes extending in the axial direction of the pipes 42, 43, 52, and 53 Since the second header pipe units 41a to 41f can be slid in the axial direction, thermal stress can be relaxed. As a result, defects such as cracks can be prevented.

  Moreover, the connection parts 50 and 60 are provided at equal intervals. Thereby, the pitch space | interval of the hollow fiber membrane module 2 connected to the connection parts 50 and 60 via the expansion joint 51 can be positioned at equal intervals. Moreover, since the hollow fiber membrane module 2 is connected at equal intervals, the filtration pressure of each hollow fiber membrane module 2 can be made uniform, and the filtration performance of the hollow fiber membrane 2a can be made uniform.

  In the second header pipe unit 41 f, the through hole 67 formed in the flange portion 64 of the water absorption joint 62 is a long hole extending in the radial direction of the main body portion 63 of the water absorption joint 62. The companion flange portion of the water absorbing device that is disposed to be opposed to and fixed to the flange portion 64 has various sizes (outer diameters) according to industrial standards of each country other than the ISO standard. For this reason, when the flange portions are brought into contact with each other, there is a problem that the position of the through hole through which the bolt is inserted does not match, and in order to solve this, it is necessary to take measures such as arranging an intermediate member or the like in between. . Therefore, by making the through hole 67 of the flange portion 64 a long hole, it becomes possible to correspond to the through holes of various standard phase flanges.

  Further, since the rib portions 47, 49, 59 are provided on the outer peripheral surfaces of the pipes 42, 43, 52, 53 of the first and second header pipe units 41a to 41f, the inside of the pipes 42, 43, 52, 53 is provided. Deformation due to pressure fluctuations can be prevented.

  Further, in the pipes 52 and 53, openings K1 and K2 are provided at a portion where the water absorption joint 62 is connected. The openings K1 and K2 are formed from the upper part of the pipe 52 to the height position of the central axis. Has been. And the pipes 52 and 53 are connected by the connection member J in the height position of the central axis in which the opening parts K1 and K2 were formed. With such a configuration, a rib structure is formed at a portion communicating with the water absorbing joint 62. Therefore, even if it is a case where it pressurizes, for example in the case of backwashing, the intensity | strength which can endure the pressurization is securable.

  The present invention is not limited to the above embodiment. For example, in the said embodiment, although the pipe member of this invention is applied to the 1st and 2nd header pipe units 41a-41b which comprise the header pipe 4, a pipe member may be applied to another structure.

  Further, the number of second header pipe units 41f arranged is not limited to one. For example, the second header pipe unit 41 f may be disposed on both end sides of the header pipe 4. Further, the arrangement position of the second header pipe unit 41f is not limited to the above embodiment, and may be arranged at the center position of the header pipe 4, for example.

  In the above embodiment, in the second header pipe unit 41f, the water absorption joint 62 protrudes upward from the pipes 52 and 53 (in a direction orthogonal to the axial direction of the pipes 52 and 53). , May be provided at other positions. For example, the water absorption joint 62 may be provided so as to protrude along the axial direction of the pipes 52 and 53. In short, any configuration that communicates with both the pipes 52 and 53 may be used.

  In the above embodiment, the hollow fiber membrane module 2 is used as the fluid transfer means, the header tube 4 is used as the fluid transfer pipe, and the fluid transfer unit is configured as the membrane unit 1. It is not limited.

  DESCRIPTION OF SYMBOLS 1 ... Membrane unit (fluid transfer unit), 2 ... Hollow fiber membrane module (fluid transfer means), 3 ... Frame (support), 4 ... Header pipe (fluid transfer pipe), 41a-41e ... 1st header pipe unit ( 1st pipe member), 41f ... 2nd header pipe unit (2nd pipe member), 42, 43, 52, 53 ... Pipe (pipe) 46, 56 ... Contact part, 48, 58 ... Through-hole, 47, 49 , 59 ... rib part, 62 ... water absorption joint (communication part), 64 ... flange part, K1, K2 ... opening part.

Claims (9)

A tube member made of a thermoplastic resin that is attached to a support that supports the fluid transfer means and that constitutes at least a part of a fluid transfer pipe connected to the fluid transfer means;
A plurality of tubes juxtaposed to each other to form a fluid flow path;
And the support abutment portion abutting,
A communication portion communicating with all the flow paths of the plurality of tubes ,
The contact portion is provided with a through hole through which a fixing means for fixing the contact portion and the support body is inserted.
The through hole, Ri long hole der extending along the axial direction of the tube,
Around the opening on the tip side of the communication part, a flange part is provided,
The flange portion is formed with a through hole through which a fixing means for fixing the flange portion is inserted.
The through hole, the pipe member, wherein the elongated hole der Rukoto extending along the radial direction of the communicating portion. Each of the plurality of tubes is provided with a plurality of tubular connection portions that communicate with the flow path and are connected to the fluid transfer means,
The pipe member according to claim 1, wherein the connection portions are provided at equal intervals in the axial direction of the pipe and at equal intervals between adjacent pipes.   The pipe member according to claim 1 or 2, wherein a rib portion is provided on an outer peripheral surface of the plurality of pipes. Each of the plurality of pipes is formed with an opening that allows the pipes to communicate with each other in a portion that communicates with the communication section.
Each of the openings is formed from a position corresponding to the inner surface of the communication part in the pipe to a height position of the central axis of the pipe,
The pipe member according to any one of claims 1 to 3, wherein the plurality of pipes are connected by a connecting member at a height position of a central axis of the pipe in the opening. Any one claim of the pipe member according to claim 1-4, characterized in that said fluid transfer means is a membrane module. A fluid transfer pipe attached to and in contact with a support for supporting the fluid transfer means and connected to the fluid transfer means;
A first pipe member and a second pipe member made of thermoplastic resin are connected to each other;
The first pipe member includes a plurality of pipes that are juxtaposed with each other to form a fluid flow path, and a contact portion that comes into contact with the support,
The second pipe members are juxtaposed to each other, a plurality of pipes forming a fluid flow path, a contact part that comes into contact with the support, and a communication part that communicates with all the flow paths of the plurality of pipes. With
The contact portion of the first tube member and the second tube member is provided with a through hole through which a fixing means for fixing the contact portion and the support body is inserted.
The fluid transfer pipe according to claim 1, wherein the through hole is a long hole extending along an axial direction of the pipe. The fluid transfer pipe according to claim 6, wherein the fluid transfer means is a membrane module. A fluid transfer pipe according to claim 6 or 7 ,
Fluid transfer means;
A fluid transfer unit comprising a support for supporting the fluid transfer means. 9. The fluid transfer unit according to claim 8, wherein the fluid transfer means is a membrane module.

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