JP4648892B2 - Spiral membrane module - Google Patents

Description

  The present invention relates to a spiral membrane module in which a plurality of spiral membrane elements for separating components dissolved in a liquid or the like are connected via a connecting mechanism and accommodated in a pressure vessel.

  A spiral membrane module generally has a structure in which a plurality of spiral membrane elements are connected and accommodated in a pressure vessel (see, for example, Patent Document 1). This separation membrane element has, as its basic structure, a bi-fold membrane leaf sandwiching a supply-side channel material on the membrane separation layer side around a perforated central tube, and a permeation-side channel material adjacent thereto A separation membrane unit comprising one or a plurality of laminated bodies is wound.

  FIG. 20 shows a cross-sectional view of an element connecting portion of a conventional separation membrane module. As shown in this figure, telescope prevention members 36 and 37 are provided at both ends of the separation membrane unit 32. An FRP (exterior material) 31 is wound around the separation membrane unit 32. The FRP 31 is integrated with the separation membrane unit 32 and the telescope prevention members 36 and 37 by curing the FRP 31.

  The telescope prevention members 36 and 37 are provided with hub plates 36a and 37a, respectively. When actually performing fluid separation, a force resulting from a pressure difference between the supply side and the concentration side acts from the supply side to the concentration side of the separation membrane element. This force is supported by a telescope prevention member 36 provided on the concentration side. This prevents the separation membrane unit 32 from causing a telescope phenomenon. Further, the telescope prevention member 37 has a function of gripping the supply liquid sealing member 38. The supply liquid sealing member 38 seals the gap between the pressure vessel 39 and the FRP 31.

  When the separation membrane units 32 are connected in series, a coupler 34 as a connecting tube that can be inserted into the central tube 33 is inserted into the central tube 33 and the two are connected. O-rings 35 are respectively provided on the inner peripheral surfaces in the vicinity of both ends of the center tube 33. In addition, annular grooves 40 that can hold the O-ring 35 are provided near both ends of the coupler 34. According to the separation membrane module having this structure, the telescope phenomenon can be reduced.

  However, since the separation membrane elements are not fixed to each other, the O-ring 35 easily slides on the inner surface of the central tube 33 due to relative displacement in the axial direction with each other when the operation is started and stopped. As a result, wear of the O-ring 35 occurs, so that there is a risk that water permeation occurs from the supply side and the water quality deteriorates. Further, since the inner diameter r of the coupler 34 is smaller than the inner diameter R of the central tube 33, the coupler 34 is resistant to the flow of permeate. As a result, there has been a problem that the pressure loss of the permeate side channel is large.

  In order to solve such a problem, in Patent Document 2 below, an O-ring is held on the abutting surface of the end portion of the central tube, and an engaging portion is provided on the hub of the telescope prevention member (cap). An element connecting structure capable of compressing an O-ring by fastening elements together is disclosed. According to this connection structure, wear of the O-ring can be prevented by preventing relative displacement between elements, and pressure loss in the permeate side flow path can be reduced.

  However, in this connection structure, it is necessary to prevent the engagement portion from loosening due to a pressure change caused by the start or stop operation of the operation, and the engagement connection operation becomes more difficult to loosen the engagement portion of the telescope prevention member. In addition, there is a problem that the operation of disconnection becomes complicated.

Japanese Patent Laid-Open No. 11-267469 JP 2004-536703 A

  Accordingly, an object of the present invention is to provide a spiral membrane module in which membrane elements can be easily connected to each other and the connection is not loosened or disconnected during operation.

The above object can be achieved by the present invention as described below.
That is, in the spiral membrane module of the present invention, a plurality of spiral membrane elements each having a membrane and a flow passage material wound around a perforated central tube are connected in series via a connecting mechanism and are placed in a pressure vessel. In the accommodated spiral membrane module, the coupling mechanism is provided at one of the upstream end or the downstream end of the membrane element and is engageable with the other of the upstream end or the downstream end. A movable member having a joint portion is provided, and the movable member has a contact portion that contacts the inner wall of the pressure vessel and locks the engagement by the engagement portion.

  According to the present invention, as a coupling mechanism for suppressing relative displacement between adjacent membrane elements, a movable member having an engaging portion is provided, and the movable member abuts against the inner wall of the pressure vessel to lock the engagement. Therefore, the membrane elements can be easily connected to each other only by accommodating the membrane elements in the pressure vessel in a state where the engaging portions are engaged, and the connection is not loosened or disconnected during operation.

  In the above, it is preferable that the connection mechanism includes a release mechanism that releases the engagement by the engagement portion when the contact portion is not in contact with the inner wall. According to this configuration, the membrane elements can be simply connected to each other simply by accommodating the membrane elements in the pressure vessel, and conversely, the membrane elements can be disconnected from each other simply by taking the membrane element out of the pressure vessel.

  Moreover, it is preferable that the said movable member is a lever member which has a flexible part which cancels | releases the said engagement with an elastic restoring force. According to this configuration, the engagement portion can be engaged and released with a simple structure by deformation of the flexible portion.

  Furthermore, it is preferable that the upstream end portion and the downstream end portion to be connected each include a guide inclined portion that guides the engaging portion of the movable member to the mating engaging portion by relative rotation of both. By providing the guide slopes at the upstream end and the downstream end, respectively, even when the positions of the engaging parts are slightly shifted, the guide slope causes relative rotation when the two are brought into contact with each other. The joint part is guided, and both can be engaged smoothly.

  In addition to the connection mechanism, it is preferable that a lock mechanism that operates by receiving a liquid flow and suppresses separation between the upstream end and the downstream end of the membrane element is preferably provided. According to this configuration, the lock mechanism is activated by the flow of liquid generated when the membrane module is used, and the separation of the membrane element end can be suppressed. The parts can be connected and fixed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view (non-connected state) of an essential part showing an example of a connection mechanism of the spiral membrane module of the present invention, and FIG. 2 shows the connection state. 3 is an enlarged view of a main part showing an AA arrow view in FIG. 1, and FIG. 4 is an enlarged view of an essential part showing an BB arrow view. For ease of explanation, there are portions shown in an enlarged or reduced scale.

  As shown in FIG. 2, the spiral membrane module of the present invention includes a spiral membrane element 20 (hereinafter referred to as “membrane element”) in which a membrane and a flow path material are wound around a perforated central tube 3 in multiple layers. , A plurality of units connected in series via a connecting mechanism J and accommodated in the pressure vessel 10. The present invention is characterized by the coupling mechanism J of the membrane element 20, and any other known configuration can be adopted for the other membrane modules.

  The membrane element 20 has a structure in which a separation membrane unit 2 composed of a membrane and a channel material is wound around a perforated central tube 3. The separation membrane unit 2 has a structure in which, for example, a membrane leaf and a permeation-side flow channel material having a configuration in which a supply-side flow channel material is disposed between two folded separation membranes are alternately stacked. The membrane element 20 can employ any of conventionally known separation membranes, permeation-side flow path materials, supply-side flow path materials, the central tube 3, and the like.

  For example, when a plurality of supply side flow path materials and permeation side flow path materials are used, a structure in which a plurality of membrane leaves are wound around the central tube 3 is obtained. On the outside of the membrane element 20, FRP1, which is a fiber reinforced resin as an exterior material, is formed. A plurality of membrane elements 20 are connected and accommodated in the pressure vessel 10.

  As shown in FIG. 1, a telescope prevention member 4 is provided on the concentration side of the separation membrane unit 2. The telescope prevention member 4 prevents the membrane element 20 from being deformed into a telescope shape. The telescope prevention member 4 is provided with a through hole 4e through which the central tube 3 can penetrate, and an end portion on the concentration side of the central tube 3 is fitted into the through hole 4e. Further, the telescope preventing member 4 is provided with a hub plate 4a with the through hole 4e as the center.

  An O-ring 7 is provided on the inner peripheral surface of the through-hole 4 e of the telescope prevention member 4 in order to maintain water tightness with the central tube 3. By providing the O-ring 7, it is possible to prevent the supply liquid and the permeate from being mixed, and the separation performance is improved. A radial annular groove 4c of the O-ring 7 is provided on the inner peripheral surface of the through hole 4e. In addition, adhesion, ultrasonic welding, friction welding, or the like can be applied to the watertight holding of the telescope prevention member 4 and the center tube 3.

  Further, on the supply side of the separation membrane unit 2, a fitting member 5 that can be fitted to the telescope prevention member 4 is provided. The fitting member 5 allows the membrane elements to be connected in series by fitting with the telescope preventing member 4. The fitting member 5 is provided with a through hole 5e through which the central tube 3 can pass, and an end portion on the supply side of the central tube 3 passes through the through hole 5e and is inserted in a partially protruding state. Yes. The fitting member 5 is provided with a hub plate 5a with the through hole 5e as the center.

  An annular groove 5 c is provided on the outer peripheral side of the fitting member 5. An annular seal member 6 that seals the gap between the pressure vessel 10 and the membrane element 20 is held in the annular groove 5c. The seal member 6 has an annular shape that protrudes in the radial direction and extends in the circumferential direction, and is in close contact with the inner wall 10 a of the pressure vessel 10. In order to ensure close contact with the pressure vessel 10, the material of the seal member 6 is preferably an elastic body.

  At the time of fitting, the center tube 3 is inserted into the through-hole 4e of the telescope prevention member 4 by the amount protruding from the fitting member 5 to the supply side. The through hole 4e is provided with an O-ring 8 and a radial annular groove 4c into which the O-ring 8 can be fitted. Providing the O-ring 8 makes it possible to maintain watertightness with the central tube 3. Since the telescope prevention member 4 and the fitting member 5 are connected so as to suppress relative displacement as will be described later, the relative displacement between the O-ring 8 and the center tube 3 is also suppressed, and wear is prevented. Further, since the O-ring wrap length 3a can be shortened by suppressing the relative displacement, the coupler can be eliminated and the seal position of the O-ring can be moved to the outer peripheral surface of the center tube 3. By eliminating the need for connecting means such as a coupler, there is no constriction in the permeate side flow path, and pressure loss is reduced. In addition, the number of parts and material costs can be reduced.

  The telescope prevention member 4 and the fitting member 5 are provided with a wrap portion 4b and a wrap portion 5b, respectively, and are fixed to the membrane element 20 by winding the portions with FRP1. Thereby, the separation membrane unit 2, the telescope prevention member 4, and the fitting member 5 are integrated.

  In the spiral membrane module of the present invention, the coupling mechanism is provided at one of the upstream end or the downstream end of the membrane element, and can be engaged with the other of the upstream end or the downstream end. The movable member includes a contact portion that contacts the inner wall of the pressure vessel and locks the engagement by the engagement portion. In this embodiment, as shown in FIGS. 1 to 4, the movable member M constituting the coupling mechanism J is a lever member 9 provided on the telescope prevention member 4 corresponding to the downstream end of the membrane element 20. There is shown an example in which the lever member 9 has an engaging portion 9d that can be engaged with the fitting member 5 corresponding to the upstream end portion.

  The lever member 9 is fitted and attached along a guide groove 4 f provided in the telescope prevention member 4. The leading end of the guide groove 4f is widened so that the lever member 9 can be freely rotated. That is, the lever member 9 has a rotation mechanism, and rotates when the pressure member 10 is loaded into contact with the inner wall 10 a of the pressure vessel 10.

  The lever member 9 has a fulcrum 9a at its substantially center, an engaging portion 9d at the downstream end, an abutting portion 9c at the other end, and a flexible portion 9b branched from the vicinity of the fulcrum 9a. The abutting portion 9c has a function of abutting on the inner wall 10a of the pressure vessel 10 and locking the engagement by the engaging portion 9d.

  The flexible portion 9b of the lever member 9 has a function of releasing the engagement by an elastic restoring force. That is, the coupling mechanism J of the present embodiment includes a release mechanism that releases the engagement by the engagement portion 9d when the contact portion 9c is not in contact with the inner wall 10a.

  The connecting operation by the lever member 9 will be described below. Outside the pressure vessel 10, the guide 4g of the telescope prevention member 4 adjacent between the guides 5g of the fitting member 5 is aligned and fitted. Thereafter, when the fitting portion is loaded into the pressure vessel 10, the abutting portion 9c of the lever member 9 abuts against the inner wall 10a of the pressure vessel 10 and is pushed down, the flexible portion 9b of the lever member 9 is curved, and the fulcrum 9a Lever member 9 rotates in the direction of arrow 9e. At that time, the engaging portion 9d of the lever member 9 is engaged with the engaging portion 5f of the fitting member 5 to complete the locking.

  When the membrane element 20 is removed from the pressure vessel 10, the lever member 9 rotates in the direction opposite to the arrow 9e by the action of the flexible portion 9b of the lever member 9, and the lock is automatically released. In a series of operations for operating the lock mechanism, no extra operation is required as compared with the conventional membrane element loading operation.

  The lever member 9 may be formed of the same material as that of the flexible portion 9b. In that case, the lever member 9 is preferably formed of a flexible and high-strength resin material such as polypropylene. The flexible portion 9b can also be formed by a leaf spring or the like.

[Other Embodiments]
(1) In the above-described embodiment, an example in which the movable member of the coupling mechanism is configured by a lever member that is rotatably supported by a fulcrum and has a flexible portion branched from the fulcrum has been described. As shown in FIGS. 5 to 8, the coupling mechanism J may be configured using a lever member 11 that can be swung by a flexible portion 11 e.

  In this example, a lever member 11 having a Z-shaped cross-sectional shape is attached to the fitting member 5 having a locking hole 5h. Moreover, the hole used as the engaging part 4h is formed in the position where the telescope prevention member 4 respond | corresponds.

  When the membrane element 20 is loaded into the pressure vessel 10, the inner wall 10a of the pressure vessel 10 and the contact portion 11c of the lever member interfere with each other, the lever member 11 is pushed down, and the engaging portion 11d of the lever member 11 becomes the lever member. 11h, the hole 5h of the fitting member 5, and the engaging portion 4h of the telescope prevention member 4 are simultaneously inserted (state of FIG. 6), and the relative displacement between the adjacent membrane elements 20 is suppressed.

  The fitting member 5 has a concave portion 5i, and the telescope preventing member has a convex portion 4i, and may have a function of positioning at the time of fitting and a function of preventing rotation after fitting. .

  (2) Moreover, in this invention, as shown in FIGS. 9-12, you may comprise the connection mechanism J using the movable member M by which a main body is flexible and rockable and deformable by this. At this time, the movable member M may be configured by a lever portion formed integrally with the fitting member 5.

  In this example, the lever portion 5j formed integrally with the fitting member 5 is pushed down by the abutment of the abutment portion 51 when loaded into the pressure vessel 10, and is adjacent to the engagement portion 5k at the tip of the lever portion 5j. The engaging portions 4k provided in the telescope prevention member 4 to be engaged with each other (state of FIG. 10), and the relative displacement between the adjacent membrane elements 20 is suppressed.

  The fitting member has a concave portion 5m, and the telescope preventing member has a convex portion 4m, and may have a function of positioning at the time of fitting and a function of preventing rotation after fitting.

  (3) In the above-described embodiments, the example in which the movable member has a lever-like member has been described. However, the movable member in the present invention may have a button-like member. For example, in the embodiment shown in FIGS. 5 to 8, a button member urged outward by a coil spring is provided instead of the lever member 11, and the lower end of the button member is engaged with the engaging portion 4 h of the telescope prevention member 4. The engaging portion may be configured as an engaging portion, and the upper end of the button member may be in contact with the inner wall 10a of the pressure vessel 10 to lock the engagement by the engaging portion.

  At this time, the coil spring constitutes a release mechanism that releases the engagement by the engagement portion when the contact portion is not in contact with the inner wall.

  (4) In the above-described embodiment, an example in which the coupling mechanism is provided on the telescope prevention member and the fitting member has been described. However, the coupling mechanism of the present invention is configured so that the upstream end and the downstream side of adjacent membrane elements What is necessary is just to connect an edge part, and other than the combination of a telescope prevention member and a fitting member is also possible.

  For example, both do not need to have a fitting structure, and may have a seal ring on the abutting surface. In that case, it is preferable to provide the connection mechanism in this invention in two or more places. In addition, when providing only one connection mechanism, it is preferable to have a structure in which at least adjacent central tubes are fitted.

  (5) In the above-described embodiment, an example of a movable member suitable for an end entry type pressure vessel in which a supply port and a discharge port are provided on both end faces of the pressure vessel is shown. However, the movable member in the present invention is a pressure vessel. It is preferable to be suitable for a side entry type pressure vessel in which supply ports and discharge ports are provided in the vicinity of both ends of the body portion. In other words, since the side entry type has an opening on the inner wall, particularly when the membrane element is taken out, the movable member of the above-described embodiment is likely to catch the contact portion. A connecting mechanism (particularly a movable member) that can be taken out is desirable. As such a connection mechanism, what is shown, for example in FIGS. 13-16 is illustrated.

  First, the example shown in FIG. 13 is obtained by further extending the contact portion 5l of the lever member 5j into an arc shape in the examples shown in FIGS. That is, when the connecting mechanism J is configured using the movable member M that can be oscillated and deformed, the extension curved inwardly from the contact portion 5l of the lever portion 5j formed integrally with the fitting member 5 to the front end side. Part 5o is provided. The extension portion 5o prevents the contact portion 5l from being caught by the opening even when the membrane element 20 is retracted.

  Next, the example shown in FIG. 14 is an example in which the lever portion 5j is extended in an arc shape as shown in FIG. 13, but a movable member M integrated with the annular seal member 6 is provided. In other words, when the coupling mechanism J is configured using the movable member M that can swing and deform, the extension portion curved inwardly from the contact portion 6c of the lever portion 6a formed integrally with the seal member 6 to the front end side. 6d is provided. The extension 6d prevents the contact portion 6c from being caught by the opening even when the membrane element 20 is retracted.

  In the example shown in FIG. 15, the width C <b> 1 of the movable member M is made larger than the diameter of the opening of the pressure vessel 10, so that the contact portion 5 l is not caught in the opening. In other words, when the coupling mechanism J is configured using the movable member M that can swing and deform, the lever portion 5j integrally formed with the fitting member 5, particularly the width C1 of the contact portion 5l is larger than the diameter of the opening. is doing. As a result, even when the membrane element 20 is retracted, the contact portion 5l does not fall into the opening, and can be prevented from being caught.

  Further, in the example shown in FIG. 16, when the engaging portion 5k of the movable member M is engaged with the engaging portion 4k of the telescope preventing member 4, the lever portion 5j is deformed and the engaging portion 5k is the convex portion 4o. When the engagement portion 4k is overcome and engaged with the engagement portion 4k to release the engagement within the pressure vessel 10, the contact portion 5l moves outward and contacts the inner wall 10a, thereby locking the engagement. This is an example.

  That is, in this example, when the engaging portion 5k of the movable member M is engaged, the contact portion 5l is not in contact with the inner wall 10a, and when the engaging portion 5k tries to get over the convex portion 4o. Since the contact portion 5l contacts the inner wall 10a, the engagement cannot be released inside the pressure vessel 10. For this reason, even when the membrane element 20 is retracted, the contact portion 5l is not caught in the opening.

  Further, according to this structure, when the membrane element 20 is connected and engaged outside the pressure vessel 10, the engagement is appropriately performed with the feeling and sound when the engaging portion 5k gets over the convex portion 4o. There is an advantage that you can feel whether or not.

  (6) Moreover, in this invention, as shown to Fig.17 (a)-(c), the upstream edge part and downstream edge part which are connected are engagement part 16c of the movable member M by relative rotation of both. Each may be provided with a guide inclined portion 16d for guiding to the mating engagement portion 15a. In that case, it is preferable that an upstream edge part and a downstream edge part are each provided with the internal fitting part 15 which has a circular-arc-shaped outer peripheral surface, and the external fitting part 16 which can be externally fitted to this.

  For example, in the example shown in FIG. 17A, the upstream end and the downstream end have an inner fitting portion 15 having an arc-shaped outer peripheral surface and an arc-shaped inner peripheral surface that can be fitted on the inner fitting portion 15. The outer fitting part 16 is provided and the connection mechanism J is comprised by this. In this connection mechanism J, the protruding portion 16 a of the outer fitting portion 16 corresponds to the movable member M, and the concave engaging portion 16 c provided on the inner peripheral surface of the outer fitting portion 16 and the outer peripheral surface of the inner fitting portion 15. The provided convex engaging portion 15a engages.

  The cross-sectional shape of the engaging portions 15a and 16c in front view may be any shape, but as shown in FIG. 18 (a), the cross-sectional shape in front view is trapezoidal, as shown in FIG. 18 (b). In addition, it is preferable that the cross-sectional shape of the front view is an arc shape, and that the cross-sectional shape of the front view is a combination of two concave and convex arcs as shown in FIG. In addition, the shape of the engaging portions 15a and 16c in plan view may be any shape, and examples thereof include a circle, an ellipse, a square, a rectangle, and a triangle. The unevenness of the engaging portions 15a and 16c can be reversed upside down.

  In addition, the movable member M that is the outer fitting portion 16 has a contact portion 16b that contacts the inner wall 10a of the pressure vessel 10 and locks the engagement by the engagement portions 15a and 16c. The cross-sectional shape of the contact portion 16b when viewed from the front may be any shape, but is preferably an arc shape, a semicircular shape, a trapezoidal shape, a triangular shape or the like. Any shape may be sufficient as the planar view shape of the contact part 16b, However, Circular, an ellipse, a square, a rectangle, a triangle etc. are mentioned.

  In the example shown in FIG. 17A, the outer fitting portion 16 at the upstream end and the outer fitting portion 16 at the downstream end have corrugated end surfaces, and these end surfaces define the engaging portions 16c. A guide inclined portion 16d that guides to the engaging portion 15a is configured. Based on FIGS. 19A to 19E, the operation of connecting and disconnecting the membrane element 20 using the guide inclined portion 16d will be described.

  When the membrane elements 20 are brought into contact with each other in the direction of the arrow in FIG. 19A, the guide inclined portions 16d abut against each other as shown in FIG. 19B. By further pushing in, as shown in FIG. 19C, even when the positions of the engaging portions are slightly shifted, relative rotation occurs due to the sliding of the guide inclined portion 16, and the engaging portions are guided. Connection by engagement can be performed.

  When the membrane element 20 is removed, as shown in FIGS. 19D to 19E, the membrane elements 20 are rotated relative to each other, so that a separation force is generated due to the sliding of the guide inclined portion 16. The engagement by the joint portions 15a and 16c can be released (the illustration of the engagement portions 15a and 16c is omitted in FIG. 19).

  On the other hand, in the example shown in FIG. 17 (b), the outer fitting portion 16 at the upstream end and the outer fitting portion 16 at the downstream end have zigzag end surfaces having triangular protrusions, This end surface constitutes a guide inclined portion 16d that guides the engaging portion 16c to the engaging portion 15a.

  Further, in the example shown in FIG. 17C, the outer fitting portion 16 at the upstream end and the outer fitting portion 16 at the downstream end have zigzag end faces having trapezoidal protrusions, This end surface constitutes a guide inclined portion 16d that guides the engaging portion 16c to the engaging portion 15a.

  (7) In the above-described embodiment, an example in which the coupling mechanism is fixed to the upstream end and the downstream end of the membrane element has been described. However, at least the upstream end or the downstream end is not provided. On the other hand, it is preferable to provide a coupling mechanism that can change the position of the engaging portion. By providing such a connection mechanism, especially when applied to a large-diameter membrane element, alignment by rotation of the large-diameter membrane element is unnecessary, and thus the membrane elements are more easily connected.

  As a connecting mechanism that can change the position of the engaging portion, for example, when providing the connecting mechanism J shown in FIGS. 17A to 17C, at least one of the upstream end and the downstream end. The connecting member having the engaging portion 16c or the engaging portion 15a is rotatably provided. In order to provide the connecting member in a freely rotatable manner, for example, a circumferential guide groove is provided on the outer periphery of the upstream end or the downstream end of the membrane element, and the guide member is fitted around the guide groove and along the guide groove. It is possible to adopt a structure in which the connecting member is constituted by a cylindrical member guided by the protrusion formed on the inner peripheral surface.

  Furthermore, the connecting member provided rotatably may be configured to allow rotation in only one direction by a ratchet mechanism. With this configuration, the rotation of the membrane elements in the reverse direction can be transmitted to the connecting member, whereby the membrane elements can be separated from each other.

  (8) In the present invention, a lock mechanism different from the lock by the contact portion is provided so that the membrane element end portions can be connected and fixed together with the lock by the contact portion. Also good. For example, it is preferable to provide a lock mechanism that is actuated by receiving a liquid flow and suppresses separation between the upstream end and the downstream end of the membrane element, separately from the connection mechanism.

  As such a locking mechanism, for example, a rotating blade that rotates in response to a liquid flow is provided at at least one of an upstream end portion or a downstream end portion, and a fixed engaging portion that engages with the rotating blade that is rotated on the other end. The structure which provided is mentioned. Further, there is a structure in which a hook member that swings downstream by receiving a liquid flow is provided at the upstream end, and a fixed engagement portion that engages the swinging hook member is provided at the downstream end. .

Cross-sectional view of an essential part showing an example of a connection mechanism of the spiral membrane module of the present invention (non-connected state) Cross-sectional view of relevant parts showing an example of a connection mechanism of the spiral membrane module of the present invention (connected state) The principal part enlarged view which shows the AA arrow line view in FIG. The principal part enlarged view which shows the BB arrow line view in FIG. Cross-sectional view of the principal part showing another example of the connection mechanism of the spiral membrane module of the present invention (non-connected state) Cross-sectional view of the main part showing another example of the connection mechanism of the spiral membrane module of the present invention (connected state) The principal part enlarged view which shows the CC arrow directional view in FIG. The principal part enlarged view which shows the DD arrow line view in FIG. Cross-sectional view of the principal part showing another example of the connection mechanism of the spiral membrane module of the present invention (non-connected state) Cross-sectional view of the main part showing another example of the connection mechanism of the spiral membrane module of the present invention (connected state) The principal part enlarged view which shows the EE arrow line view in FIG. The principal part enlarged view which shows the FF arrow line view in FIG. Cross-sectional view of the principal part showing another example of the connection mechanism of the spiral membrane module of the present invention (non-connected state) Cross-sectional view of the principal part showing another example of the connection mechanism of the spiral membrane module of the present invention (non-connected state) The principal part perspective view which shows the other example of the connection mechanism of the spiral membrane module of this invention Sectional drawing of the principal part which shows the other example of the connection mechanism of the spiral membrane module of this invention Cross-sectional view of the principal part showing another example of the connection mechanism of the spiral membrane module of the present invention (non-connected state) Cross-sectional view of the principal part showing another example of the engaging part of the spiral membrane module of the present invention (connected state) Explanatory drawing for demonstrating the operation | movement of connection of the spiral type membrane module of this invention, and isolation | separation Cross-sectional view of the main part showing an example of a connection mechanism of a conventional spiral membrane module

Explanation of symbols

1 FRP
2 Separation membrane unit 3 Center tube 4 Telescope prevention member 4h Hole (engagement part)
4k engaging part 5 fitting member 5f engaging part 5j lever part 5k engaging part 9 lever member 9a fulcrum 9b flexible part 9c abutting part 9d engaging part 10 pressure vessel 10a inner wall 11 lever member 11c abutting part 11d fitting Joint part 15 Inner fitting part 15a Engaging part 16 Outer fitting part 16a Protruding part 16b Abutting part 16c Engaging part 16d Guide inclined part 20 Membrane element J Connection mechanism M Movable member

Claims (5)

In the spiral membrane module in which a spiral membrane element in which a membrane and a channel material are wound in multiple layers around a perforated central tube are connected in series via a connecting mechanism and accommodated in a pressure vessel.
The coupling mechanism includes a movable member that is provided at one of the upstream end or the downstream end of the membrane element and has an engaging portion that can be engaged with the other of the upstream end or the downstream end, The movable member has an abutting portion that abuts against an inner wall of the pressure vessel and locks engagement by the engaging portion.   2. The spiral membrane module according to claim 1, wherein the connection mechanism includes a release mechanism that releases the engagement by the engagement portion when the contact portion is not in contact with the inner wall.   The spiral membrane module according to claim 2, wherein the movable member is a lever member having a flexible portion that releases the engagement by an elastic restoring force.   2. The spiral according to claim 1, wherein the upstream end and the downstream end connected to each other are each provided with a guide inclined portion that guides the engaging portion of the movable member to the mating engaging portion by relative rotation thereof. Mold membrane module.   2. The spiral membrane module according to claim 1, further comprising a lock mechanism that is actuated by receiving a liquid flow and prevents separation between an upstream end and a downstream end of the membrane element. .

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