WO2012117669A1

WO2012117669A1 - Connecting member and separation membrane module

Info

Publication number: WO2012117669A1
Application number: PCT/JP2012/000766
Authority: WO
Inventors: 貴久小西; 顕太郎小林; 誠小泓
Original assignee: 日東電工株式会社
Priority date: 2011-02-28
Filing date: 2012-02-06
Publication date: 2012-09-07
Also published as: JP2012176372A

Abstract

A connecting member (5A) is provided with a hollow shaft (51) with both ends fitted inside a central tube (21) of a spiral separation membrane element (2), and a plate (52) that extends to the periphery from the central section of the shaft (51). At least one of the shaft (51) and the plate (52) has sensors attached thereon, and an antenna (65) connected to the sensors is arranged on the plate (52). The length (L) of protrusion of both ends of the shaft (51) from the plate (52) is 0.2-1.4 times the outer diameter of the shaft (51).

Description

Connecting member and separation membrane module

The present invention relates to a connecting member for connecting spiral separation membrane elements and a separation membrane module using the connecting member.

Conventionally, for example, a spiral separation membrane element used for seawater desalination or ultrapure water production is known. For example, Patent Document 1 discloses a separation membrane module 10 using a spiral separation membrane element 12 as shown in FIG. In this separation membrane module 10, a plurality of spiral separation membrane elements 12 are loaded in a row in a cylindrical pressure vessel 11. Then, as shown by arrows in FIG. 9, when raw water is supplied into the pressure vessel 11 from one end of the separation membrane module 10, the raw water is separated from the permeated water by the separation membrane of the spiral separation membrane element 12. Separated into concentrated water, they are discharged separately from the other end of the separation membrane module 10.

Adjacent spiral separation membrane elements 12 are connected by a connecting member 15. Each spiral separation membrane element 12 has a configuration in which a laminate including a separation membrane and a channel material is wound around a central tube 13. The connecting member 15 is usually composed of a short tube whose both ends are fitted to the central tube 13 of the spiral separation membrane element 12. In the example shown in FIG. 9, the connecting member 15 is fitted to the central tube 13 from the outside.

Furthermore, Patent Document 1 describes that the connecting member 15 is provided with various sensors for detecting the properties of raw water and permeated water and antennas for transmitting detection signals from these sensors. With this configuration, in the separation membrane module 10 disclosed in Patent Document 1, a sensor or the like can be reused even when the spiral separation membrane element 12 is replaced.

JP 2009-166034 A

However, when an electrical component such as a sensor or an antenna is attached to the connecting member 15 composed of the short pipe as described above, the area where the electrical component can be arranged is limited because the surface area of the connecting member 15 is small. For this reason, the freedom degree of the design of the electric circuit constructed | assembled using those electric components on the connection member 15 is restrict | limited.

In view of such circumstances, an object of the present invention is to provide a connecting member capable of improving the degree of freedom in designing an electric circuit constructed on the connecting member, and a separation membrane module using the connecting member. To do.

In order to solve the above-described problems, the present invention provides a connecting member that connects spiral-type separation membrane elements in which a laminate including a separation membrane and a flow path material is wound around a central tube, and both end portions are A hollow shaft portion fitted in the central tube, a plate portion extending from the central portion of the shaft portion to the periphery, a sensor attached to at least one of the shaft portion and the plate portion, and held by the plate portion, An antenna connected to the sensor, and a length at which both end portions of the shaft portion protrude from the plate portion is not less than 0.2 times and not more than 1.4 times the outer diameter of the shaft portion. Providing a member.

The present invention also provides the above-described connecting member, a spiral separation membrane element that is connected to each other by the connecting member and includes a separation membrane and a flow path member wound around a central tube, and the spiral A separation membrane module comprising: a cylindrical pressure vessel that houses a mold separation membrane element.

According to the above configuration, by providing the plate portion on the shaft portion, it is possible to secure a large area where electric parts can be arranged. For this reason, it becomes possible to construct a desired electric circuit by freely determining the arrangement positions of the sensor and the antenna. In particular, from the viewpoint of performing good radio communication, it is effective to hold the antenna on the plate portion that spreads from the shaft portion to the periphery as in the present invention.

By the way, when the length of the shaft portion of the connecting member is long, the shaft portion is attached to the shaft portion such as an O-ring when the spiral separation membrane element of the shaft portion is fitted into and removed from the center tube. The seal member needs to be rubbed for a long distance along the inner peripheral surface of the central tube, and a large amount of labor is required for the workability of fitting and extracting the shaft portion. Moreover, when the spiral separation membrane element is replaced, the spiral separation membrane element may be pulled out while swinging up and down and left and right to release the connection state with the adjacent spiral separation membrane element in the pressure vessel. The shaft portion of the connecting member may be broken. In particular, when the connecting member has a sensor as in the present invention, the damage of the connecting member has a great influence on the cost.

On the other hand, in the present invention, the workability of fitting and removing the shaft portion can be improved by devising the length of the shaft portion of the connecting member, and the shaft portion when replacing the spiral separation membrane element Can be prevented.

Sectional drawing of the separation membrane module using the connection member which concerns on 1st Embodiment of this invention. Schematic configuration diagram of spiral separation membrane element Partial enlarged view of FIG. 4A is a plan view of the connecting member according to the first embodiment of the present invention, and FIG. 4B is a sectional view taken along line IVB-IVB in FIG. 4A. FIG. 5A is a plan view of a connecting member according to the second embodiment of the present invention, and FIG. 5B is a side view of the connecting member. 6A is a plan view of a connecting member according to a third embodiment of the present invention, and FIG. 6B is a side view of the connecting member. Sectional drawing of the separation membrane module using the connection member which concerns on 4th Embodiment of this invention. Partial enlarged view of FIG. Cross-sectional view of a separation membrane module using a conventional connecting member

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following description relates to an example of the present invention, and the present invention is not limited to these.

(First embodiment)
FIG. 1 shows a separation membrane module 1 using a connecting member 5A according to the first embodiment of the present invention. This separation membrane module 1 includes a cylindrical pressure vessel 7 called a vessel, and a plurality of spiral separation membrane elements 2 (hereinafter simply referred to as “separation membrane element 2”) loaded in the pressure vessel 7 in a line. And has. The connecting member 5A connects adjacent separation membrane elements 2 to each other.

Disc-

shaped caps

8 and 9 are attached to both ends of the pressure vessel 7. On one side (left side in FIG. 1), a supply pipe 81 for supplying raw water into the pressure vessel 7 is provided at a position shifted from the center. The other (right side in FIG. 1) cap 9 is provided with a first discharge pipe 91 for taking out permeate at the center, and a second discharge pipe 92 for taking out concentrated water at a position shifted from the center. Is provided. That is, a flow of raw water from one cap 8 toward the other cap 9 is formed in the pressure vessel 7. The supply pipe 81 and the second discharge pipe 92 may be provided in the pressure vessel 7.

In this embodiment, a reverse osmosis membrane element is used as the separation membrane element 2. However, the separation membrane element 2 may be an ultrafiltration membrane element, for example.

Each separation membrane element 2 includes a central tube 21 functioning as a water collecting tube, a laminated body 22 wound around the central tube 21, and a pair fixed to both ends of the central tube 21 so as to sandwich the laminated body 22. The end member 3 and the exterior material 28 surrounding the laminated body 22 are included. The pair of end members 3 also serves to prevent the laminate 22 from extending in a telescopic manner.

In the present embodiment, the upstream end member 3 of the pair of end members 3 is used as the seal member 4 and the gap between the separation membrane element 2 and the inner peripheral surface of the pressure vessel 7 is used as the upstream pressure of the raw water. A packing having a substantially U-shaped cross section for sealing is attached. However, the seal member 4 is not limited to the packing having a substantially U-shaped cross section, and any shape can be used as long as the gap between the separation membrane element 2 and the inner peripheral surface of the pressure vessel 7 can be sealed. You may have.

The central tube 21 is formed with a plurality of introduction holes through which permeated water flows (see FIG. 2). A hollow shaft portion 51 described later of the connecting member 5 </ b> A constitutes a continuous flow path for allowing permeate to flow across the central pipe 21 of the adjacent separation membrane element 2. A plug 82 is attached to the central pipe 21 of the separation membrane element 2 located on the most upstream side, and the central pipe 21 of the separation membrane element 2 located on the most downstream side is connected to the first discharge pipe 91 by a connector 93. Has been.

As shown in FIG. 2, the laminated body 22 has a rectangular shape in which the winding direction is one opposite side direction, and a membrane leaf in which the separation membranes 23 are superimposed on both surfaces of the permeate flow path member 24; Raw water channel material 25. The membrane leaf has a configuration in which the separation membranes 23 are joined to each other at three sides so as to form a bag opening in one direction, and the opening communicates with the introduction hole of the central tube 21. The permeate flow path member 24 is a net made of, for example, a resin, and forms a flow path for allowing permeate to flow between the separation membranes joined to each other. The raw water channel material 25 is, for example, a net made of resin (a net having a mesh size larger than that of the permeated water channel material 24), and forms a channel for flowing the raw water between the surrounding portions of the wound membrane leaf. To do.

Examples of the separation membrane 23 include a composite reverse osmosis membrane in which a polyamide skin layer is provided on a nonwoven fabric or a polysulfone porous membrane support, a polyvinyl alcohol separation membrane having excellent permeability, and a sulfonation suitable for a nanofiltration membrane. Examples include polyethersulfone separation membranes.

The pair of end members 3 are fixed to the central tube 21 so that their end faces are located on the same plane. Specifically, each end member 3 includes an inner cylindrical portion 31 that is fitted to the end portion of the central tube 21 from the outside, and an outer cylindrical portion 32 that is concentric with the inner cylindrical portion 31 and surrounds the inner cylindrical portion 31 while being spaced apart. have.

The inner cylindrical portion 31 and the outer cylindrical portion 32 are connected to each other by a plurality of radially arranged ribs. The space between the ribs constitutes a circulation port 30 (see FIG. 3) through which the raw water flows through the end member 3. A thin plate provided with a plurality of through holes may be provided between the ribs.

A groove extending in the circumferential direction may be formed on the outer peripheral surface of the outer cylindrical portion 32, and the seal member 4 may be appropriately disposed in this groove. Furthermore, a step for holding the exterior material 28 may be formed in the outer cylindrical portion 32. Moreover, it is preferable to provide the groove part for distribute | circulating raw | natural water in the end surface contact | abutted to the plate part 52 mentioned later of the outer side cylinder part 32. FIG. The groove portion may be provided on the wall surface of the plate portion 52.

As shown in FIG. 3 and FIGS. 4A and 4B, the connecting member 5A includes a shaft portion 51 whose both ends are fitted into the central tube 21, and a plate portion 52 that extends from the central portion of the shaft portion 51 to the periphery. In the present embodiment, the shaft portion 51 and the plate portion 52 are integrally formed of resin, but these may be molded separately and then joined by a bonding agent or welding. Further, the connecting member 5 </ b> A includes a first flow rate sensor 61 attached to the plate portion 52 and a second flow rate sensor 62 attached to the shaft portion 51.

A method for integrally forming the shaft portion 51 and the plate portion 52 is not particularly limited, and examples thereof include injection molding, extrusion molding, insert molding, cast molding, and vacuum casting. . The resin used is polystyrene (PS), ABS, polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), polyamide (PA), polyacetal (POM), polyethylene terephthalate (PET). , Polybutylene terephthalate (PBT), 2,5-diphenyloxazole (PPO), polysulfone (PSU), polyphenylene sulfide (PPS), p-aminosalicylic acid (PAS), 4- (2-pyridylazo) resorcinol (PAR), polyphenylene Examples include ether (PPE), polyethersulfone (PES), polyetheretherketone (PEEK), and polyimide (PI). In the cast molding, an epoxy resin or a urethane resin can be used. Moreover, in order to improve intensity | strength, you may add additives, such as glass fiber, carbon fiber, and a filler, to said resin.

The shaft portion 51 has a cylindrical shape with a certain thickness. For this reason, the part which protrudes from the plate part 52 in the axial part 51 fits in the center pipe | tube 21. As shown in FIG. Further, both surfaces of the plate portion 52 in the axial direction of the shaft portion 51 constitute a contact surface that contacts the end surface of the separation membrane element 2.

Although not shown, seal members (for example, O-rings) that seal the gap between the outer peripheral surface of the shaft portion 51 and the inner peripheral surface of the center tube 21 are mounted on both ends of the shaft portion 51, respectively. The number of seal members attached to one end may be one or plural. The center tube 21 does not necessarily have a constant inner diameter over the entire length, and an end portion of the center tube 21 is provided with an enlarged portion having an enlarged inner diameter. The end of the part 51 may be fitted.

The length L (see FIG. 4B) at which both end portions of the shaft portion 51 protrude from the plate portion 52 (more precisely, the contact surface that contacts the end surface of the separation membrane element 2 in the plate portion 52) is the length of the shaft portion 51. The outer diameter D is not less than 0.2 times and not more than 1.4 times. For example, in the connecting member for the separation membrane element 2 having an outer diameter of 8 inches, the length L at which both end portions of the shaft portion 51 protrude from the plate portion 52 is 5 mm or more and 40 mm or less. When the protrusion length L is smaller than 0.2D, there is an increased risk that the shaft portion 51 comes off from the central tube 21 (the connected state is released) due to a change in water flow when the water treatment operation is turned on / off. When the protruding length L is greater than 1.4D, it is difficult to fit the shaft portion 51 into the central tube 21 and to remove it from the central tube 21. Moreover, when the separation membrane element 2 is replaced, the separation membrane element 2 may be pulled out while swinging up, down, left and right in order to release the connection state with the adjacent separation membrane element 2 in the pressure vessel 7. The stress may concentrate on the joint portion of the shaft portion 51 with the plate portion 52 and the shaft portion 51 may be broken. More preferably, the length L at which both end portions of the shaft portion 51 protrude from the plate portion 52 is not less than 0.3 times and not more than 1.3 times the outer diameter D of the shaft portion 51.

The plate portion 52 includes a plurality of (three in the illustrated example) retreating portions 53 that are kept near the shaft portion 51 and a plurality of (three in the illustrated example) projecting portions 54 that project radially outward from the retreating portion 53. Including. The retreating portion 53 and the overhanging portion 54 are provided so as to be alternately arranged around the shaft portion 51. That is, in this embodiment, the plate part 52 has a shape that projects in three directions at intervals of 120 degrees.

Each receding portion 53 may have an end surface extending in a direction orthogonal to the axial direction of the shaft portion 51. In the present embodiment, the end surface of the receding portion 53 is a curved surface that is convex toward the central axis of the shaft portion 51. However, the end surface of the receding portion 53 may be a flat surface that connects adjacent protruding portions 54 with the shortest distance, or may be a curved surface that protrudes radially outward. Alternatively, when the projecting portion 54 has a certain width larger than the outer diameter of the shaft portion 51, the end surface of the receding portion 53 may be a ridge line where the side surfaces of the projecting portion 54 intersect.

It is preferable that each overhang portion 54 has a width sufficiently larger than the thickness. Moreover, it is preferable that each projecting portion 54 projects as close as possible to the inner peripheral surface of the pressure vessel 7. For example, the distance from the front end surface of the overhanging portion 54 to the inner peripheral surface of the pressure vessel 7 is about 0.1 to 3 cm.

Although the form of the first flow sensor 61 and the second flow sensor 62 described above is not limited, in this embodiment, an impeller type flow meter is employed as the first flow sensor 61 and the second flow sensor 62. The first flow rate sensor 61 is for measuring the flow rate of the concentrated raw water sent from the upstream separation membrane element 2 to the downstream separation membrane element 2, and the second flow rate sensor 62 is the upstream flow rate sensor 62. This is for measuring the flow rate of the permeated water sent from the separation membrane element 2 to the separation membrane element 2 on the downstream side.

One of the overhang portions 54 (the overhang portion 54 located in the lower left in FIG. 4A) is provided with a through hole 55 that penetrates the overhang portion 54 in the axial direction of the shaft portion 51. It is disposed in the through hole 55. On the other hand, the second flow sensor 62 is disposed in the shaft portion 51.

In the present embodiment, only one first flow sensor 61 is provided, but it is preferable that a plurality of first flow sensors 61 having different sizes are provided. If such a form is used, it is possible to correct errors caused by individual differences in the flow sensors.

An antenna 65 for transmitting a detection signal from the first flow rate sensor 61 and the second flow rate sensor 62 is provided on the other overhang portion 54 (the overhang portion 54 located on the upper side in FIG. 4A). Is held at the tip. Here, the “tip portion” refers to a region of about １／ from the tip surface of the entire length of the projecting portion 54 from the shaft portion 51. In the present embodiment, the antenna 65 is enclosed in the overhang portion 54.

When the antenna 65 extends in a substantially circumferential direction around the shaft portion 51, the overhanging portion 54 has a width larger than the length of the antenna 65. The length of the antenna 65 depends on the frequency of the radio wave used for wireless communication.

Further, in the present embodiment, the first flow sensor 61, the second flow sensor 62, and the circuit board 63 connected to the antenna 65 are located radially inside the antenna 65 in the projecting portion 54 holding the antenna 65. Is also enclosed. In other words, the antenna 65 is connected to the first flow rate sensor 61 and the second flow rate sensor 62 via the circuit board 63. The circuit board 63 includes a wireless communication circuit for performing wireless communication using the antenna 65, and a power control circuit that controls supply of power from the power supply device 64 described later to the first flow sensor 61 and the second flow sensor 62. Etc. are formed.

A power supply device 64 that supplies power to the first flow rate sensor 61 and the second flow rate sensor 62 via the circuit board 63 is enclosed in the remaining overhang portion 54 (the overhang portion 54 located in the lower right in FIG. 4A). Yes. As the power supply device 64, connection with a battery, a generator, an AC power supply, or wireless power transmission can be used. Among these, the use of a battery is preferable.

As a method for realizing the encapsulation of the electrical component in the overhanging portion 54 as described above, for example, the shaft portion 51 and the plate portion 52 are divided into two in the axial direction of the shaft portion 51, and a split surface of one piece of them The method of joining both pieces after mounting an electrical component in (1) is mentioned.

In the connecting member 5A of the present embodiment described above, by providing the plate portion 52 in the shaft portion 51, it is possible to secure a large area where electric parts can be arranged. For this reason, it is possible to freely determine the arrangement positions of the

sensors

61 and 62 and the antenna 65 to construct a desired electric circuit. In particular, from the viewpoint of performing good wireless communication, it is effective to hold the antenna 65 on the plate portion 52 spreading from the shaft portion 51 to the periphery as in the present embodiment.

Further, in the present embodiment, when the shaft portion 51 is fitted into the central tube 21 of the separation membrane element 2 and when the shaft portion 51 is removed from the central tube 21, the seal member attached to the shaft portion 51 is disposed on the inner peripheral surface of the center tube 21. The distance to be rubbed along is appropriate. Therefore, workability of fitting and extracting the shaft portion 51 can be improved. Moreover, even when the separation membrane element 2 is replaced, even if the separation membrane element 2 is pulled out while swinging up and down and left and right, the shaft portion 51 can be prevented from being broken or the connecting member 5A from being broken.

Furthermore, in this embodiment, since the antenna 65 is enclosed in the overhanging portion 54, an inexpensive antenna 65 that is not waterproofed can be used.

In the present embodiment, the first flow sensor 61 and the second flow sensor 62 are used. However, the sensor of the present invention is not limited to this, and can detect the properties of raw water and permeate. Any thing may be adopted if it exists. For example, the sensor of the present invention may be a pressure sensor, a temperature sensor, an electric concentration sensor, or the like. Moreover, the sensor of this invention should just be attached to at least one of the axial part 51 and the plate part 52. FIG.

Further, both surfaces of the plate portion 52 in the axial direction of the shaft portion 51 are not necessarily flat. For example, ring-shaped projections are formed on both surfaces of the plate portion 52 so as to surround the shaft portion 51, and the tip end surface of this projection forms a contact surface that contacts the end surface of the separation membrane element 2. Good.

Furthermore, it is preferable that a plurality of the retreating portions 53 are provided, and the number of the retreating portions 53 is preferably about 2 to 6. Thereby, since the removal from multiple places is attained, the stress concerning the end member 3 and the plate part 52 can be reduced.

(Second Embodiment)
Next, with reference to FIG. 5A and 5B, the connection member 5B which concerns on 2nd Embodiment of this invention is demonstrated. In the present embodiment, the same components as those described in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. This also applies to third and fourth embodiments described later.

In this embodiment, two retreat portions 53 and two overhang portions 54 are provided so as to be alternately arranged around the shaft portion 51. In other words, the retreating parts 53 and the projecting parts 54 are located opposite to each other with the shaft part 51 interposed therebetween.

In the first embodiment, the end surface of the receding portion 53 is a curved surface that is convex toward the central axis of the shaft portion 51 (see FIG. 4A). However, in this embodiment, the end surface of the receding portion 53 is the overhanging portion 54. It is a flat surface that extends straight on both sides from a position that defines the shortest distance from the central axis of the shaft portion 51 so as to be continuous with the side surface of the shaft portion 51. That is, the end surfaces of the both receding parts 53 are parallel to each other.

Further, the plate portion 52 is provided with an arcuate bridge portion 56 that bridges the distal end portions of the overhang portion 54 while forming a space 57 into which the hand can be inserted, for example, between the plate portion 52 and the retracted portion 53. In the present embodiment, the depth of the bridge portion 56 is set large, and the bridge portion 56 also bridges the central portions of the overhang portions 54.

The outer side surface of the bridge portion 56 is continuous with the distal end surface of the overhang portion 54, and these surfaces constitute a cylindrical outer peripheral surface 52 a of the plate portion 52.

A large number of holes are formed in both sides of the space 57 in the overhanging portion 54 and the bridge portion 56, and the raw water concentrated in the upstream separation membrane element 2 through the holes is separated into the separation membrane element 2 on the downstream side. To be sent to.

The antenna 65 is held at the tip of one of the overhang portions 54 (the overhang portion 54 located on the left in FIG. 5A). Similar to the first embodiment, the antenna 65 is enclosed in the overhanging portion 54.

Further, a pressure sensor 66 for detecting the pressure of the raw water is attached to one of the bridge portions 56 (the bridge portion 56 located below in FIG. 5A), and a circuit board 63 is provided in the bridge portion 56. It is enclosed.

In the present embodiment, an annular conductive wire 67 is disposed along the outer peripheral surface 52a of the plate portion 52 so that power can be supplied to the pressure sensor 66 from the outside of the pressure vessel 7 wirelessly. The conductive wire 67 is enclosed in the overhang portion 54 and the bridge portion 56. The antenna 65 and the conductive wire 67 are separated from each other in the axial direction of the shaft portion 51 in the plate portion 52.

If the bridge part 56 which bridges the front-end | tip parts of the overhang | projection part 54 is provided like this embodiment, a sensor and a circuit board will be supported by this bridge part 56, and the electric power for receiving by radio | wireless is received. An annular conductive wire 67 can be provided, and the degree of freedom in design can be improved.

Note that the effect of the length of the shaft portion 51 is the same as that of the first embodiment.

(Third embodiment)
Next, with reference to FIG. 6A and 6B, the connection member 5C which concerns on 3rd Embodiment of this invention is demonstrated.

The connecting member 5C of the present embodiment has a plate portion 52 in which the depth of the retreating portion 53 and the bridge portion 56 is reduced and the width of the overhanging portion 54 is reduced compared to the connecting member 5B of the second embodiment. Have. The pressure sensor 4 and the circuit board 63 are supported by the overhanging portion 54 that holds the antenna 65, and the power supply device 64 is supported by another overhanging portion 54.

As shown in FIG. 6A, the width of the overhanging portion 54 is smaller than the length of the antenna 65. For this reason, the antenna 65 is enclosed in the overhang portion 54 and a bridge portion 56 located on both sides of the overhang portion 54.

Thus, if the antenna 65 is enclosed in the overhanging portion 54 and the bridge portion 56 located on both sides of the overhanging portion 54, the width of the overhanging portion 54 can be reduced, and the retracted portion 53 and the bridge portion 56. A large space 57 formed between the two can be secured.

(Fourth embodiment)
Next, with reference to FIG. 7 and FIG. 8, the connection member 5D which concerns on 4th Embodiment of this invention is demonstrated. In FIG. 7, the separation membrane element 2 not having the end member 3 (see FIG. 1) is illustrated, but the separation membrane element 2 may have the end member 3. In this case, the end member 3 may not have the seal member 4 attached thereto.

In the present embodiment, the plate portion 52 has three retreat portions 53 and three overhang portions 54 as in the first embodiment. However, in the present embodiment, as in the second and third embodiments, the end portions of the overhang portions 54 are bridged by the bridge portion 56, and the end surface of the overhang portion 54 and the outer surface of the bridge portion 56 are plates. A cylindrical outer peripheral surface 52a of the portion 52 is configured. On the outer peripheral surface 52a, an annular groove 52b that opens radially outward is formed over the entire circumference, and the seal member 4 is disposed in the annular groove 52b.

Thus, if the sealing member 4 is attached to the connecting member 5D, the end member 3 of the separation membrane element 2 can be omitted.

(Other embodiments)
In the first to third embodiments, the antenna 65 is enclosed in the overhanging portion 54. However, if the antenna 65 is waterproofed, for example, part or all of the antenna 65 is exposed from the overhanging portion 54. You may do it.

DESCRIPTION OF SYMBOLS 1 Separation membrane module 2 Spiral type separation membrane element 21 Center pipe 22 Laminated body 23 Separation membrane 24 Permeate flow path material 25 Raw water flow path material 4 Seal member 5A-5D Connection member 51 Shaft part 52 Plate part 52a Outer peripheral surface 52b Annular groove 53 Retreat part 54 Overhang part 55 Through-hole 56 Bridge part 57 Space 61 First flow sensor 62 Second flow sensor 63 Circuit board 64 Power supply device 65 Antenna 66 Pressure sensor 7 Pressure vessel

Claims

A connecting member that connects spiral type separation membrane elements wound around a central tube with a laminate including a separation membrane and a flow path material,
A hollow shaft portion whose both ends are fitted into the central tube,
A plate portion extending from the central portion of the shaft portion to the periphery;
A sensor attached to at least one of the shaft portion and the plate portion;
An antenna held by the plate portion and connected to the sensor,
The length by which the both ends of the shaft portion protrude from the plate portion is 0.2 to 1.4 times the outer diameter of the shaft portion.
The plate portion includes a receding portion that is kept near the shaft portion, and an overhanging portion that projects outward in the radial direction from the receding portion,
The connection member according to claim 1, wherein the antenna is held at a distal end portion of the projecting portion.
The connecting member according to claim 2, wherein a plurality of the retreating part and the projecting part are provided so as to be alternately arranged around the shaft part.
The connecting member according to claim 3, wherein the plate portion further includes a bridge portion that bridges the tip portions of the overhang portions while forming a space between the retreat portion and the plate portion.
The plate portion has a cylindrical outer peripheral surface composed of a distal end surface of the overhang portion and an outer surface of the bridge portion,
The connecting member according to claim 4, wherein an annular groove that opens radially outward is formed on the outer peripheral surface, and a seal member is disposed in the annular groove.
The connecting member according to any one of claims 2 to 5, wherein the antenna is enclosed in the overhanging portion, or is enclosed in the overhanging portion and the bridge portion located on both sides of the overhanging portion. .
A power supply device enclosed in one of the overhangs to supply power to the sensor;
The connection member according to claim 3, further comprising: a circuit board connected to the sensor and the antenna, which is enclosed in one of the projecting portions.
The connecting member according to any one of claims 1 to 7, wherein the sensor includes a first flow rate sensor attached to the plate portion and a second flow rate sensor disposed in the shaft portion.
The said plate part is provided with the through-hole which penetrates the said plate part to the axial direction of the said axial part, The said 1st flow sensor is arrange | positioned in the said through-hole. Connecting member.
The connecting member according to claim 9, wherein the first flow sensor and the second flow sensor are impeller flow meters.
The connecting member according to any one of claims 1 to 10,
A spiral-type separation membrane element in which a laminate including a separation membrane and a flow path material connected to each other by the connection member is wound around a central tube;
A cylindrical pressure vessel that houses the spiral separation membrane element;
A separation membrane module.