JP2013039498A - Filter module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the sealability of a cap while achieving simple connection between external piping and a liquid passing port.SOLUTION: A primary side liquid passing port 10 of a hollow fiber membrane module 1 is formed with a quick twist type connecting mechanism into which a connector 40 of the external piping 30 is inserted, rotated and connected. The connecting mechanism includes a fit-in groove 51 into which the connector 40 is fitted, and a guide part 51a engaging a spiral protrusion 40a of the connector 40. The outer peripheral surface of the primary side liquid passing port 10 is formed with a threaded part that allows the cap 31 to be mounted to the primary side liquid passing port 10. A hollow fiber membrane has a filter area of 0.1 mor more.

Description

  The present invention relates to a filter module.

  For example, filter modules with built-in filters such as hollow fiber membranes are used for blood purification such as hemodialysis therapy and plasma exchange therapy, blood treatment performed by removing viruses from blood products, and water purification treatment. . The filter module is provided with a liquid passage port to which external piping is connected.

  A quick twist type such as a luer lock mechanism is often used as a connection mechanism between the external pipe and the liquid passage port (see Patent Document 1). The quick twist type is a simple and inexpensive connection mechanism, with one of the external piping and the fluid inlet having a groove with a predetermined shape, and the other with a protrusion that fits into the groove. By rotating it, the connection is achieved.

  By the way, a cap using the above-mentioned connection mechanism is attached to the liquid passage port of the filter module when not in use, instead of the external pipe. That is, the cap has a structure that realizes a quick twist toy type connection mechanism, similar to the connector of the external piping, and can be easily connected to the liquid inlet. With this cap, evaporation of the filling liquid filled in the filter module at the time of shipment is prevented.

Japanese Patent No. 4,604,764

  However, the above-mentioned cap does not have sufficient sealing properties, and the filling liquid gradually evaporates during transportation or storage of the module, thereby shortening the expiration date of the module. Also, in the case of the cap of the quick twist type connection mechanism, if the module is placed with the cap down, the load concentrates on a part of the cap due to the above projection, so the cap is easily deformed, which also reduces the sealing performance There are things to do.

  This invention is made | formed in view of this point, and it aims at providing the filter module which can improve the sealing performance of a cap, implement | achieving simple connection with external piping and a liquid flow port.

  The present invention that achieves the above object is a filter module that has a built-in filter and has a cylindrical liquid passage port to which an external pipe is connected, and a connector for the external pipe is inserted into the liquid passage opening. In this filter module, a quick twist type connection mechanism that is rotated and connected is formed, and a screw portion that allows a cap to be attached to the liquid passage port is formed on the outer peripheral surface of the liquid passage port. .

  According to the present invention, the cap can be fixed to the outer peripheral surface of the liquid passing port by the screw portion while realizing a simple connection between the external pipe and the liquid passing port using the quick twist type connection mechanism. Can be improved. In addition, since the cap is fixed to the outer peripheral surface of the liquid passage port, the cap and the liquid passage port are integrated, and the cap is difficult to deform even when an external force is applied. Thereby, the sealing performance of the cap can be further improved.

  The said filter module WHEREIN: The recessed part for fitting the sealing member interposed between the said caps may be formed in the front end surface of the said liquid flow port.

  The seal member may have a disc portion and a projection portion that protrudes from the center of the disc portion and is inserted into the inner flow path of the liquid passage port.

The filter may have a filter membrane area of 0.1 m ² or more.

  The filter may be a hollow fiber membrane.

  According to the present invention, since the sealing performance of the cap can be improved while realizing a simple connection between the external piping and the liquid passage port, for example, evaporation of the filling liquid in the filter module is prevented, and the expiration date of the module is extended. be able to.

It is sectional drawing which shows the outline of a structure of a hollow fiber membrane module. It is explanatory drawing of the longitudinal cross-section which shows the structure of the primary side liquid flow port and the connector of external piping. It is explanatory drawing of the longitudinal cross-section which shows the structure of a primary side liquid inlet and a cap. It is explanatory drawing at the time of connecting the connector of external piping to the primary side liquid flow port. It is explanatory drawing at the time of attaching a cap to the primary side liquid flow port. It is explanatory drawing at the time of connecting the screwed connector of external piping to the primary side liquid flow port. It is explanatory drawing at the time of attaching a cap to the primary side liquid flow opening through the sealing member.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Drawing 1 is an explanatory view of the longitudinal section showing the outline of the composition of hollow fiber membrane module 1 as a filter module concerning this embodiment. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

The hollow fiber membrane module 1 is formed in a substantially cylindrical shape, for example, as shown in FIG. A bundle of hollow fiber membranes A is accommodated inside the hollow fiber membrane module 1. The hollow fiber membrane A has a filter area of, for example, 0.1 m ² or more. At both ends of the hollow fiber membrane module 1, primary side liquid inlets 10 are respectively formed. Further, two secondary-side liquid passage ports 11 are formed in the side wall portions near the both end portions of the hollow fiber membrane module 1.

  As shown in FIG. 2, the primary side liquid inlet 10 is formed in a substantially cylindrical shape that protrudes outward from the end face of the hollow fiber membrane module 1. For example, an external pipe 30 such as a rubber tube and a cap 31 shown in FIG. 3 can be selectively attached to the primary side liquid passing port 10.

  As shown in FIG. 2, a quick twist type connection mechanism is formed in the primary side liquid inlet 10, in which the connector 40 of the external pipe 30 is inserted and rotated. Specifically, an annular fitting groove 51 having a diameter larger than that of the internal flow path 50 is formed in the primary side liquid inlet 10 so as to open to the distal end surface 10a. In the fitting groove 51, a spiral guide portion 51 a that engages with the spiral protrusion 40 a of the connector 40 of the external pipe 30 is formed.

  As shown in FIG. 4, the cylindrical connector 40 of the external pipe 30 is inserted into the fitting groove 51 with respect to the primary side fluid inlet 10, and is rotated by one revolution or less, whereby the spiral protrusion 40 a and the guide 51 a. Are engaged, and the external pipe 30 and the primary-side liquid inlet 10 can be connected in an airtight manner.

  As shown in FIG. 3, a male screw 60 that is a threaded portion is formed on the outer peripheral surface of the primary side liquid inlet 10. The cap 31 is formed in a cylindrical shape with one surface covering the primary side liquid inlet 10 being closed. A female screw 70 screwed with the male screw 60 is formed on the inner side surface of the cap 31, and the cap 31 can be rotated and fitted into the primary side liquid inlet 10 as shown in FIG. 5. The inner bottom surface of the cap 31 is flat, and when the cap 31 is fitted into the primary side fluid inlet 10, the flat surface 31 a of the cap 31 and the tip surface 10 a of the primary side fluid inlet 10 are in close contact. The internal flow path 50 of the primary side liquid inlet 10 can be sealed. If more adhesion is required, a disc-shaped sealing member may be interposed between the flat surface 31 a of the cap 31 and the tip surface 10 a of the primary side liquid inlet 10.

  In the hollow fiber membrane module 1 configured as described above, for example, when not in use, caps 31 are fitted into the primary side liquid inlets 10 on both sides as shown in FIG. At the time of use, the cap 31 is removed from the primary side liquid inlet 10 and the connector 40 of the external pipe 30 is connected instead as shown in FIG. At this time, by inserting the connector 40 into the fitting groove 51 of the primary side liquid inlet 10 and rotating it within one round or less, the spiral protrusion 40a and the guide part 51a are engaged, and the connector 40 is connected to the primary side liquid inlet. 10 is fixed.

  Moreover, the external piping 30 can be connected to the primary side liquid inlet 10 using the connector 75 with a screw, as shown in FIG. At this time, a ring-shaped sealing member may be interposed between the flat surface 75 a of the screwed connector 75 and the tip end surface 10 a of the primary side liquid passing port 10.

  In the embodiment described above, a simple connection between the external pipe 30 and the primary-side fluid inlet 10 is realized using a quick twist type connection mechanism, and a cap is provided on the outer peripheral surface of the primary-side fluid inlet 10 with a screw portion. Since 31 can be fixed, the sealing performance of the cap 31 can be improved. Moreover, since the cap 31 is fixed to the outer peripheral surface of the primary side liquid inlet 10, the cap 31 and the primary side liquid inlet 10 are integrated, and the cap 31 is not easily deformed even when an external force is applied. Thereby, the sealing performance of the cap 31 can be further improved. As a result, for example, evaporation of the filling liquid in the module 1 is prevented, and the expiration date of the module can be extended.

  Moreover, since the thread part is formed in the outer peripheral surface of the primary side liquid inlet 10, the external piping 30 which has the connector 75 with a screw can also be connected. Therefore, the user can select the type of connector according to the air tightness required for processing using the hollow fiber membrane module 1, the pressure resistance, etc., and the usability is improved. Particularly in the case of long-time filtration, there is a possibility that the connector is loosened due to vibration caused by the flow of the filtrate or the like, or the connector is detached and the filtrate leaks.

Since the hollow fiber membrane A having a filter membrane area of 0.1 m ² or more is used as the filter, for example, the usage period of the expensive hollow fiber membrane module 1 becomes longer.

  In the above embodiment, as shown in FIG. 7, the concave portion 80 is formed in the distal end surface 10 a of the primary-side liquid inlet 10, and the seal member 81 interposed between the cap 31 is fitted into the concave portion 80. You may make it. The seal member 81 may include a disk portion 90 and a protrusion 91 that protrudes from the center of the disk portion 90 and is inserted into the inner flow path 50 of the primary-side liquid flow port 10. In such a case, since the sealing performance when the cap 31 is attached to the primary-side liquid inlet 10 is improved, the filling liquid in the hollow fiber membrane module 1 can be more reliably prevented from evaporating before use.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  For example, in the above embodiment, as a connection mechanism for connecting the primary-side fluid inlet 10 and the external pipe 30, a fitting groove 51 or the like is provided in the primary-side fluid inlet 10, and the spiral protrusion on the connector 40 of the external pipe 30. Although 40a etc. were provided, it may be reversed. In addition, as a quick twist type connection mechanism, a luer lock type mechanism in which the connector 30 is inserted into the fitting groove 51 is used. However, a groove is provided in one of the cap and the liquid passage port, and the other is fitted in the groove. Any other configuration may be used as long as it has a protrusion and rotates one of them in one turn or less to achieve the connection. For example, a bayonet-type connector may be used in which a recess is provided in part in one groove, a claw is provided in the other protrusion, and the protrusion is inserted into the groove and rotated to fit the claw into the recess.

Moreover, although the example which attaches the cap 31 to the primary side liquid inlet 10 was described in the above embodiment, this invention is applicable also when attaching the cap 31 to the secondary side inlet 11. Further, the filter is not limited to the hollow fiber membrane, and may be other filters such as a flat membrane type, a spiral type, a pleat type, and a tubular type. Further, the filter may have a membrane area of less than 0.1 m ² .

  The present invention is useful for improving the sealing performance of the cap while realizing a simple connection between the external pipe and the liquid passage port.

DESCRIPTION OF SYMBOLS 1 Hollow fiber membrane module 10 Primary side fluid inlet 10a Tip surface 11 Secondary side fluid inlet 30 External piping 31 Cap 31a Flat surface 40 Connector 40a Spiral protrusion 50 Internal channel 51 Fitting groove 51a Guide part 60 Male screw 70 Female thread 75 Connector 75a Flat surface 80 Recess 81 Seal member 90 Disk part 91 Projection part A Hollow fiber membrane

Claims (5)

A filter module having a built-in filter and having a cylindrical liquid passage port to which external piping is connected,
The liquid passage port is formed with a quick twist type connection mechanism in which a connector of the external pipe is inserted and rotated to be connected,
A filter module in which a screw portion that allows a cap to be attached to the liquid passage port is formed on an outer peripheral surface of the liquid passage port.   2. The filter module according to claim 1, wherein a concave portion for fitting a seal member interposed between the cap and the cap is formed on a front end surface of the liquid passage port.   The filter module according to claim 2, wherein the seal member includes a disc portion and a projection portion that protrudes from the center of the disc portion and is inserted into an inner flow path of the liquid passage port. The filter module according to claim 1, wherein the filter has a filter membrane area of 0.1 m ² or more.   The filter module according to claim 1, wherein the filter is a hollow fiber membrane.

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