JP4712645B2 - Sliding solenoid valve - Google Patents

Description

  The present invention relates to a sliding solenoid valve that opens and closes a flow path or switches the flow path.

  In various analytical equipment such as chemical testing equipment, environmental analysis equipment, and biotechnology research equipment, improvement of accuracy, improvement of testing speed, minimization of specimens and reagents, miniaturization of equipment, etc. are regarded as the most important issues. There is a need for improved performance for solenoid valves for fluid control used in analyzers. In particular, the amount of change in the internal volume (pumping volume) due to the opening and closing of the valve body of the valve affects the control of a small amount of fluid accompanying the minimization of the specimen and reagent, and the pumping volume can be minimized or zero. It is essential to improve the accuracy of various analyzers.

  Conventionally, solenoid valves used in various analyzers use a diaphragm as a valve mechanism in consideration of excellent chemical resistance and a small internal volume. The diaphragm forms a partition that separates the fluid and the drive source, receives a driving force such as a spring from the outside, closes the hole of the flow path to block the flow path, and receives the driving force of the solenoid to Open the hole to open the flow path.

  However, in the diaphragm type solenoid valve as described above, the internal volume changes in accordance with the elastic deformation of the diaphragm membrane during operation, and the fluid is pushed out to the external port by the amount of change (pumping volume) of the internal volume. Therefore, there is a problem in terms of accuracy.

  For this reason, conventionally, the pumping volume has been reduced by reducing the membrane part of the diaphragm, but it has not been possible to achieve zero pumping volume. Since the expansion / contraction rate of the film portion increases, there is a problem that the life of the diaphragm is shortened.

Further, as a valve used in various analyzers other than the diaphragm type solenoid valve, a multi-port valve that switches the direction of the flow path by a slide operation or a rotation operation is known (for example, see Patent Document 1). According to this multi-port valve, the pumping volume is zero, but the sliding resistance is large, so a large driving force is required, and it can be driven manually, or it can be driven manually or a servo motor, stepping motor, etc. And increased costs. Further, since a dedicated electronic circuit is often required as a motor control circuit, there is a problem that the cost is further increased and control is not easy.
JP-A-2005-106286

  The present invention solves the problems of the prior art as described above, the pumping volume becomes zero, and a small driving force is sufficient, so that the apparatus can be reduced in size, cost, and control can be facilitated. An object of the present invention is to provide a slide type solenoid valve suitable for various analyzers.

The sliding solenoid valve of the present invention is
A flow path component in which a flow path is formed;
A slide seal plate that is slidably disposed with respect to the flow path component member in the middle of the flow path of the flow path component member, and blocks the flow path opening hole portion that can communicate with the flow path. A slide seal plate having a possible channel blocking wall;
A spring for returning the slide seal plate from the advance position to the origin position;
A solenoid that slides the slide seal plate from the origin position to the advance position ;
In the slide type solenoid valve with
The slide seal plate is attached while being held in a holding hole of a holding plate inserted into the flow path component, while the thickness of the holding plate is formed to be thinner than the thickness of the slide seal plate. A gap is formed between the inner surface of the road component member and the holding plate,
The holding plate and the flow path component member are provided with a positioning mechanism for regulating the origin position of the slide seal plate, the position after sliding, and the sliding direction,
The slide seal plate opens and blocks the flow path or switches the flow path by the flow path opening hole and the flow path blocking wall according to the origin position and the advance position. Features.

  According to the slide type solenoid valve of the present invention, since the slide seal plate is used, the pumping volume can be made zero. Furthermore, since the slide seal plate is used, dead volume (excess liquid volume, extra internal volume other than the flow path) can be eliminated. In addition, since the slide seal plate only needs to include at least the flow path opening hole and the flow path blocking wall, the sliding resistance of the slide seal plate with respect to the flow path components is reduced by reducing the area of the slide seal plate. Thus, the driving force of the slide seal plate can be reduced. For this reason, it becomes possible to use a solenoid that is small, low-cost, and easy to control as a drive source, so that the apparatus can be reduced in size, cost, and control can be facilitated.

  The slide seal plate is held in a holding hole of a holding plate that is thinner than the slide seal plate. Since the thickness of the holding plate is thinner than that of the slide seal plate, the holding plate and the flow path constituting member can be kept in a non-contact state, and the sliding resistance of the holding plate can be made zero.

  The holding plate and the flow path constituting member are provided with a positioning mechanism that regulates the origin position, the position after sliding, and the sliding direction of the slide seal plate. With this positioning mechanism, the flow path can be reliably opened and closed, or the flow path can be switched accurately.

  The slide seal plate is preferably made of fluororesin, fluororubber or ethylene propylene rubber from the viewpoint of chemical resistance and sliding resistance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side sectional view of an essential part of a slide type solenoid valve according to a first embodiment of the present invention, FIG. 2 is a bottom view of the slide type solenoid valve, and FIG. 3 is for explaining the operation of a slide seal plate. 1 is an enlarged view of the main part of FIG. 1, FIG. 4 is a side sectional view of the slide type solenoid valve when the slide seal plate is in the state shown in FIG. 3A, and FIG. FIG. 6 is a side sectional view of the sliding solenoid valve according to the second embodiment, and FIG. 7 is a diagram for explaining the operation of the sliding seal plate. FIG. 6 is an enlarged view of a main part shown in FIG.

  The sliding solenoid valve according to the first embodiment shown in FIGS. 1 to 5 is a small solenoid valve used in various analyzers, and is a three-way port valve for switching the flow path.

  The sliding solenoid valve includes a valve body 1 in which a flow path is formed. The valve body 1 includes a first flow path component member 2, a second flow path component member 3, and two middle plates 4 and 4.

  Inside the first flow path component 2, a first flow path 5 having a branch path is formed. The first flow path 5 opens on the outer surface 2 a of the first flow path component 2. The opening 5a constitutes a first outer port connected to an external device (not shown). Further, the first flow path 5 branches into two on the inner surface 2b side of the first flow path component 2, and each branch passage 5A, 5B opens to the inner surface 2b of the first flow path component 2. Yes. These two openings 5b and 5c constitute a first inner port and a second inner port that can communicate with a flow path opening hole 25 of the slide seal plate 9, which will be described later.

  A second flow path 6 and a third flow path 7 separated from each other are formed inside the second flow path constituting member 3. The second flow path 6 is open to the outer surface 3 a of the second flow path component 3. The opening 6a constitutes a second outer port connected to an external device (not shown). Further, the second flow path 6 is opened on the inner side surface 3 b of the second flow path constituting member 3. The opening 6 b is opposed to the first inner port 5 b and constitutes a third inner port that can communicate with the flow path opening hole 25 of the slide seal plate 9. The third flow path 7 is open to the other outer surface 3 c of the second flow path component 3. The opening 7a constitutes a third outer port connected to an external device (not shown). Further, the third flow path 7 is opened on the inner side surface 3 b of the second flow path constituting member 3. The opening 7b faces the second inner port 5c and constitutes a fourth inner port that can communicate with the flow path opening hole 25 of the slide seal plate 9.

  As shown in FIG. 2, the two middle plates 4, 4 are formed as a whole between the inner surface 2 b of the first flow path component 2 and the inner surface 3 b of the second flow path component 3. It is fixed so that a flat plate is comprised. A space 8 penetrating in the vertical direction is formed between the two middle plates 4, 4, and a slide seal plate 9 and a square plate-like holding plate 10 on a circular plate are arranged in this space 8. The

  The first flow path component member 2, the second flow path component member 3, and the two middle plates 4, 4 are assembled together by four sets of bolts 11 and nuts 12 to constitute the valve body 1.

  A solenoid 14 is fixed to the upper surface of the first flow path component 2 and the second flow path component 3 by screws 13 and 13.

  The solenoid 14 includes a hollow cylindrical case 15 constituting a yoke. A fixed iron core 16 is fixed to the upper opening of the case 15. A coil 18 wound around a bobbin 17 is accommodated on the inner peripheral surface of the case 15. A movable iron core 19 is arranged in the hollow portion of the bobbin 17 so as to face the lower surface of the fixed iron core 16 so as to be movable in the vertical direction. Between the upper surface of the movable iron core 19 and the lower surface of the fixed iron core 16, a spring 20 is disposed as an origin return means that constantly applies a downward force to the movable iron core 19.

  A connecting member 21 is screwed to the lower end portion of the movable iron core 19. The connecting member 21 is accommodated in a bottomed cylindrical concave portion 22 formed by the first and second flow path constituting members 2 and 3 and the two middle plates 4 and 4.

  The holding plate 10 is fixed to the connecting member 21 with screws 23. The holding plate 10 has a circular holding hole 24 that holds the slide seal plate 9. The slide seal plate 9 is fixed to the holding hole 24 by adhesion, press fitting, or the like. The thickness of the holding plate 10 is set to be smaller than the thickness of the slide seal plate 9, and the thickness between the both surfaces of the holding plate 10 and the inner side surfaces 2 b and 3 b of the first and second flow path components 2 and 3. A gap is formed between them.

  The slide seal plate 9 is preferably made of a material that has excellent chemical resistance and a low sliding resistance with respect to the first and second flow path components 2 and 3. For this reason, the slide seal plate 9 is preferably made of fluororesin such as tetrafluoroethylene resin, fluororubber, or EPDM (ethylene propylene rubber). Note that fluororubber and EPDM are even better when processed with fluororesin.

  A through hole 25 is formed in the slide seal plate 9. This through hole has the same opening cross-sectional shape as the first and second inner ports 5b and 5c of the first flow path 5 and the third and fourth inner ports 6b and 7b of the second and third flow paths 6 and 7. And has a flow path opening hole.

  3A, when the slide seal plate 9 is at the origin position, the flow path opening hole 25 has a first inner port 5b of the first flow path 5 and a third inner side of the second flow path 6. The first flow path 5 and the second flow path 6 are kept in communication with the port 6b. At this time, in the slide seal plate 9, the portion 26 blocking the second inner port 5 c of the first flow path 5 and the fourth inner port 7 b of the third flow path 7 is connected to the first flow path 5 and the third flow path. A first flow path blocking wall portion that blocks the path 7 is configured.

  Further, as shown in FIG. 3 (B), the flow path opening hole 25 is configured so that the second inner port 5c of the first flow path 5 and the slide seal plate 9 are in a position after sliding (advance position). The third flow path 7 is in communication with the fourth inner port 7b, and the first flow path 5 and the third flow path 7 are kept in communication. At this time, in the slide seal plate 9, the portion 27 blocking the first inner port 5 b of the first flow path 5 and the third inner port 6 b of the second flow path 6 serves as a second flow path blocking wall portion. It is composed.

  As shown in FIGS. 4 and 5, a plurality of positioning holes 28, 28 that are long in the sliding direction (vertical direction) of the slide seal plate 9 are formed in the holding plate 10. A positioning pin 29 is inserted into each positioning hole 28. Both end portions of each positioning pin 29 are held in lateral holes provided on the inner surface 2 b of the first flow path component 2 and the inner surface 3 b of the second flow path component 3, respectively. The slide seal plate 9 is prevented from moving downward by the upper end of the positioning hole 28 coming into contact with the positioning pin 29 (corresponding to the state shown in FIG. 4), and the lower end of the positioning hole 28 is positioned at the positioning pin 29. Is prevented from moving upward (corresponding to the state shown in FIG. 5). The positioning hole 28 and the positioning pin 29 constitute a positioning mechanism 30.

  Next, the operation of the slide type solenoid valve configured as described above will be described.

  When the coil 18 of the solenoid 14 is not energized, the spring 20 presses the movable iron core 19 downward by the spring force, and the upper end of the positioning hole 28 of the holding plate 10 presses the positioning pin 29 via the connecting member 21. The slide seal plate 9 is at the origin position (retracted position, lower end position). Therefore, as shown in FIG. 3A, the flow path opening hole 25 of the slide seal plate 9 keeps the first flow path 5 and the second flow path 6 in communication with each other, and the slide seal plate 9 The first flow path blocking wall portion 26 keeps the first flow path 5 and the third flow path 7 in a blocked state.

  When energization of the coil 18 of the solenoid 14 is started, a magnetic field is generated in the coil 18, the movable iron core 19 receives a magnetic attraction force larger than the spring force of the spring 20 from the fixed iron core 16, and the movable iron core 19 moves upward. . As the movable iron core 19 moves, the slide seal plate 9 slides with respect to the inner surfaces 2b and 3b of the first and second flow path components 2 and 3 via the connecting member 21 and the holding plate 10 and moves upward. When the lower end of the positioning hole 28 of the holding plate 10 comes into contact with the positioning pin 29, the slide seal plate 9 stops moving, and the slide seal plate 9 is held at the forward position (upper end position). For this reason, as shown in FIG. 3B, the flow path opening hole 25 of the slide seal plate 9 keeps the first flow path 5 and the third flow path 7 in communication with each other, and the slide seal plate 9 The second flow path blocking wall portion 27 keeps the first flow path 5 and the second flow path 6 in a blocked state.

  When the energization of the solenoid 14 to the coil 18 is stopped, the magnetic field generated in the coil 18 disappears, and the magnetic attractive force acting on the movable iron core 19 disappears. For this reason, the movable iron core 19 moves downward by the spring force of the spring 20. Along with the movement of the movable iron core 19, the slide seal plate 9 slides with respect to the inner side surfaces 2 b and 3 b of the first and second flow path components 2 and 3 via the connecting member 21 and the holding plate 10. When the upper end of the positioning hole 28 of the holding plate 10 contacts the positioning pin 29, the slide seal plate 9 stops moving, and the slide seal plate 9 returns to the origin position (retracted position, lower end position). For this reason, the 1st flow path 5 and the 2nd flow path 6 will be in a communication state again, and the 1st flow path 5 and the 3rd flow path 7 will be in the interruption | blocking state again.

  As described above, the sliding solenoid valve according to the first embodiment includes the first flow path component 2 in which the first flow path 5 is formed, the second flow path 6 and the third flow path 7. The second flow path component member 3 and the first flow path component member 2 and the second flow path component member 3 are slidably arranged with respect to the first and second flow path component members 2 and 3. The slide seal plate 9 is a flow path opening hole 25 that can communicate with the first, second, and third flow paths 5, 6, 7, and the first, second, and third flow paths 5, 6, A slide seal plate 9 having first and second flow path blocking walls 26 and 27 that can block 7, a spring (origin return means) 20 that returns the slide seal plate 9 from the advanced position to the origin position, And a solenoid 14 that slides the slide seal plate 9 from the origin position to the forward position. Depending on the forward position, the passage opening hole portion 25 and the first and the second flow path blocking wall portions 26 and 27, switches the first, second, third flow path 5,6,7.

  According to the slide type solenoid valve of the first embodiment, since the slide seal plate 9 is used, the pumping volume can be made zero. Furthermore, since the slide seal plate is used, dead volume (excess liquid volume, extra internal volume other than the flow path) can be eliminated. Further, the slide seal plate 9 only needs to include at least the flow path opening hole 25 and the first and second flow path blocking walls 26 and 27. Therefore, the first area can be reduced by reducing the area of the slide seal plate 9. The sliding resistance of the slide seal plate 9 with respect to the second flow path components 2 and 3 can be reduced, and the driving force of the slide seal plate 9 can be reduced. For this reason, it becomes possible to use the solenoid 14 that is small, low-cost, and easy to control as a drive source, so that the apparatus can be reduced in size, cost, and control can be facilitated.

  The origin returning means may be a solenoid, but since the spring 20 is used, the apparatus can be further downsized.

  The slide seal plate 9 is held in the holding hole 24 of the holding plate 10 that is thinner than the slide seal plate 9. Since the thickness of the holding plate 10 is thinner than the slide seal plate 9, the holding plate 10 and the first and second flow path components 2 and 3 can be kept in a non-contact state, and the sliding resistance of the holding plate 10 Can be made zero.

  Further, the holding plate 10 and the first and second flow path components 2 and 3 are provided with a positioning mechanism 30 (positioning holes 28 and positioning pins) for regulating the origin position, the position after sliding and the sliding direction of the slide seal plate 9. 29) is provided. By the positioning mechanism 30, the first, second, and third flow paths 5, 6, and 7 can be accurately switched.

  The slide type solenoid valve according to the second embodiment shown in FIGS. 6 and 7 is a small solenoid valve used in various analyzers, and is a two-way valve that opens and closes the flow path.

  The slide type solenoid valve according to the second embodiment mainly has a point that the first flow path 5 of the first flow path component 2 does not have a branch path, and the second flow path component 3 has one flow path. A slide seal plate that has only the second flow path 6 and does not have the third flow path 7 and that the first and second flow path components 2 and 3 are configured as described above. Except for the point that the area of 9 is small, it is configured in the same manner as the slide type solenoid valve according to the first embodiment described above.

  Next, the operation of the slide solenoid valve according to the second embodiment will be described.

  When energization of the coil 18 of the solenoid 14 is not performed, the spring 20 presses the movable iron core 19 downward by the spring force, and the upper end of the positioning hole 28 (FIGS. 4 and 5) of the holding plate 10 is connected via the connecting member 21. The positioning pin 29 (FIGS. 4 and 5) is pressed, and the slide seal plate 9 is at the origin position (retracted position, lower end position). For this reason, as shown in FIG. 7A, the flow path opening hole portion 25 of the slide seal plate 9 keeps the first flow path 5 and the second flow path 6 in communication.

  When energization of the coil 18 of the solenoid 14 is started, a magnetic field is generated in the coil 18, the movable iron core 19 receives a magnetic attraction force larger than the spring force of the spring 20 from the fixed iron core 16, and the movable iron core 19 moves upward. . As the movable iron core 19 moves, the slide seal plate 9 slides with respect to the inner surfaces 2b and 3b of the first and second flow path components 2 and 3 via the connecting member 21 and the holding plate 10 and moves upward. When the lower end of the positioning hole 28 (FIGS. 4 and 5) of the holding plate 10 contacts the positioning pin 29 (FIGS. 4 and 5), the slide seal plate 9 stops moving, and the slide seal plate 9 The forward position (upper end position) is maintained. For this reason, as shown to FIG. 7 (B), the 1st flow-path interruption | blocking wall part 26 of the slide seal board 9 keeps the 1st flow path 5 and the 2nd flow path 6 in the interruption | blocking state.

  When the energization of the solenoid 14 to the coil 18 is stopped, the magnetic field generated in the coil 18 disappears, and the magnetic attractive force acting on the movable iron core 19 disappears. For this reason, the movable iron core 19 moves downward by the spring force of the spring 20. Along with the movement of the movable iron core 19, the slide seal plate 9 slides with respect to the inner side surfaces 2 b and 3 b of the first and second flow path components 2 and 3 via the connecting member 21 and the holding plate 10. When the upper end of the positioning hole 28 (FIGS. 4 and 5) of the holding plate 10 contacts the positioning pin 29 (FIGS. 4 and 5), the slide seal plate 9 stops moving, and the slide seal plate 9 Return to the home position (backward position, lower end position). For this reason, the 1st flow path 5 and the 2nd flow path 6 will be in a communication state again.

  As described above, the sliding solenoid valve according to the second embodiment includes the first flow path component 2 in which the first flow path 5 is formed and the second flow in which the second flow path 6 is formed. A slide seal that is slidably arranged with respect to the first and second flow path components 2 and 3 between the path configuration member 3 and the first flow path configuration member 2 and the second flow path configuration member 3. It is the board 9, Comprising: The flow-path opening hole part 25 which can be connected with the 1st, 2nd flow paths 5 and 6, and the 1st flow-path cutoff wall part 26 which can interrupt | block the 1st, 2nd flow paths 5 and 6 , A spring (origin return means) 20 for returning the slide seal plate 9 from the advance position to the origin position, and a solenoid 14 for sliding the slide seal plate 9 from the origin position to the advance position. The slide seal plate 9 is provided with the flow path opening hole 25 and the flow according to the origin position and the forward position. The blocking wall portions 26, to open and shut off the first, second flow path 5 and 6.

  According to the slide type solenoid valve of the second embodiment, similarly to the slide type solenoid valve of the first embodiment, the pumping volume and dead volume can be made zero, and the apparatus can be reduced in size, cost, and control. Simplification can be achieved.

  The slide type solenoid valve of the present invention is not limited to a two-way valve and a three-way valve. In addition, an injector unit (6 for partially replacing a part of a base made of water or the like with a sample is used. It can also be applied to (way valve).

It is principal part side surface sectional drawing of the slide-type solenoid valve which concerns on 1st Embodiment of this invention. It is a bottom view of the slide type solenoid valve. It is a principal part enlarged view of FIG. 1 for demonstrating operation | movement of a slide seal plate. FIG. 4 is a side sectional view of the slide type solenoid valve when the slide seal plate is in the state shown in FIG. FIG. 4 is a side sectional view of the slide type solenoid valve when the slide seal plate is in the state shown in FIG. 3B. It is side surface sectional drawing of the slide type solenoid valve which concerns on 2nd Embodiment. FIG. 7 is an enlarged view of the main part of FIG. 6 for explaining the operation of the slide seal plate.

Explanation of symbols

2 First flow path component (flow path component)
3 Second flow path component (flow path component)
5 First channel (channel)
6 Second channel (channel)
7 Third flow path (flow path)
9 Slide seal plate 10 Holding plate 14 Solenoid 20 Spring (Origin return means)
24 holding hole 25 channel opening hole 26 first channel blocking wall (channel blocking wall)
27 Second channel blocking wall (channel blocking wall)
28 Positioning hole 29 Positioning pin 30 Positioning mechanism

Claims (2)

A flow path component in which a flow path is formed;
A slide seal plate that is slidably disposed with respect to the flow path component member in the middle of the flow path of the flow path component member, and blocks the flow path opening hole portion that can communicate with the flow path. A slide seal plate having a possible channel blocking wall;
A spring for returning the slide seal plate from the advance position to the origin position;
A solenoid that slides the slide seal plate from the origin position to the advance position ;
In the slide type solenoid valve with
The slide seal plate is attached while being held in a holding hole of a holding plate inserted into the flow path component, while the thickness of the holding plate is formed to be thinner than the thickness of the slide seal plate. A gap is formed between the inner surface of the road component member and the holding plate,
The holding plate and the flow path component member are provided with a positioning mechanism for regulating the origin position of the slide seal plate, the position after sliding, and the sliding direction,
The slide seal plate opens and blocks the flow path or switches the flow path by the flow path opening hole and the flow path blocking wall according to the origin position and the advance position. Features a sliding solenoid valve. Said sliding seal plate, fluororesin, the slide solenoid valve according to claim 1, characterized in that it consists of fluorine rubber or ethylene propylene rubber.

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