JPH04117276U - valve - Google Patents

Abstract

(57) [Summary] [Purpose] In valves, the outer diameter, wall thickness,
Quickly control the opening and closing of flow paths even if the materials are different. [Structure] In the valve of the present invention, the rotation of the shaft 5 is converted into vertical movement of the pressing body 7 by the conversion mechanism, and the flexible tube body 11 is pressed. The valve includes an upper and lower support frame 16 that holds the shaft 5 via support bearings 17 and 18.
a, 16b, a bearing 19 inserted and fixed to the shaft 5, and springs 22a, 22b respectively disposed between each support frame 16a, 16b and the bearing 19,
It has detection means for detecting the position of the switch operating member 21 attached to the support body 20. Even if the outer diameter, wall thickness, material, etc. of the flexible tubular body 11 are different, in order to accurately and quickly detect the opening/closing position of the flow path, the threaded portion 6 of the conversion mechanism
A plurality of pressing bodies having different lengths can be attached to and detached from a.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is applicable to flow path systems that require sanitary properties, such as chemical equipment and bio-related equipment. This invention relates to valves useful in configuring flow path systems such as.

0002

[Conventional technology]

In order to open and close the flow path in a flow path system and to control the flow rate and pressure of the flow path, gold is usually used. Solenoid valves with metal seats and valves, hydraulically driven and motor driven valves, etc. is widely used. However, with solenoid valves that are controlled by opening and closing the flow path, It is difficult to control the flow rate and pressure accurately. In addition, the valve It has functional parts such as valve seats and valves, so it is suitable for flow path systems such as bio-related equipment. When used, bacterial cells and drug solutions remain in the channel system, reducing sanitary performance. Also, Since the connection between the valve body and the pipe body is complicated, it is recommended to use a sterilized or sterilized flow path system. It cannot be assembled within a short time and there is a high possibility of contamination with various bacteria during handling. Therefore , electromagnetic valves, etc., are used for fluid flow in bio-related equipment that requires maintaining sterile conditions. Cannot be applied to road systems.

0003 Therefore, a flexible pipe body as shown in Fig. 5 is used in the flow path system of bio-related equipment. Plumbed manual valves are used. Figure 5 shows a cross section of a conventional manual valve. It is a diagram.

0004 This valve includes a flexible tube body 31 and a cylinder made of synthetic resin such as polyacetal. It has a body 32. The flexible tube body 31 is formed on both sides of the cylinder body 32. It can be inserted into the pipe hole 33 that has been opened. The flexible tubular body 31 is placed inside the cylindrical body 32. For clamping, sealing protrusions 34a and 34b facing each other are formed. One of the sealing protrusions 34a is shaped into a spring piece 35 that forms a part of the side of the cylinder 32. has been completed. A claw 36 formed at the tip of this spring piece 35 is attached to one side of the cylindrical body 32. It locks with a ratchet 37 of an extension part extending from the end of.

[0005] In such a manual valve, the pawl 36 of the spring piece 35 is engaged with the ratchet 37. By stopping the flexible tube body 31, opening and closing of the flexible tube body 31 can be controlled.

[0006] However, for example, the manual valve constitutes a flow path system of a bio-related device. When the flow rate and pressure of the fluid in the flow path system It is difficult to finely adjust the flow rate and pressure, and automatic control is not possible. Not suitable for government use. Furthermore, after inserting the flexible tube body 31 into the piping hole 33, the claws 36 are inserted into the piping hole 33. Since it is necessary to lock the flexible tube body 31 to the checket 37, the work of attaching the flexible tube body 31 becomes complicated. Ru. In this case, the flexible pipe body 31 that has been sterilized or sterilized can be used for bio-related equipment. The flow path system cannot be configured easily and quickly, and the sterilized flexible tube body 31 may be contaminated. Highly sexual.

[0007] The rotational movement of the rotational drive source is controlled without locking the pawl 36 to the ratchet 37. The flexible tube body 31 is converted into a linear motion by a screw or a cam, and is moved by a pressing member. It is also possible to press the However, the flow path system is usually subject to external influences such as vibration. Force acts. When an external force such as vibration is applied, the pressing member presses the flexible tube. Even if it is occluded, it will become loose and fluid will leak. On the other hand, to prevent fluid leakage, In order to do this, the pressing member must always be held in place by the rotational force of the rotational drive source. There is a point. In this case, it is not economical because it is necessary to constantly supply current.

[0008] In addition, when pressing the flexible tube with a pressing member, an action is applied to the flexible tube. The flexible tube body is easily damaged by the impact force. In particular, repeat the same part of the flexible tube. If you press back, the degree of damage to the flexible tube will increase and it will not be possible to use it within a short period of time. It disappears.

[0009] Furthermore, in a valve that presses a flexible tube body with a pressing member, the flexible tube body If the diameter, wall thickness, material, etc. of the There is a problem that the flow path fluctuates and it takes time to open and close the flow path.

0010

[Problem that the idea aims to solve]

Therefore, the purpose of the present invention is that even if the outer diameter, wall thickness, material, etc. of the flexible tube body are different, An object of the present invention is to provide a valve that can quickly control opening and closing of a flow path.

[0011]

[Means to solve the problem]

In order to achieve the above object, the present invention provides a frame to which a flexible tube can be attached; a drive means disposed within the frame of the frame; A shaft rotatably placed in the upper and lower support frames of the frame via support bearings. , a bearing inserted and fixed into the shaft and arranged between the upper and lower support frames; An elastic member disposed between the bearing and the upper and lower support frames, and a shaft A conversion mechanism that converts the rotation of the foot into vertical movement of the pressing body, and the above-mentioned A pressing body attached to the lower part of the shaft and a detection device that detects the opening and closing of the flexible tube body. and a plurality of pressing bodies of different lengths are removably attached to the lower part of the shaft. Provide some valves.

0012

[Effect]

In the valve with the above configuration, the conversion mechanism converts the rotation of the shaft into the vertical movement of the pressing body. The flow path can be opened and closed by pressing or releasing the pressure on the flexible tube with the pressing body. Wear. Then, the opening/closing position of the flow path is determined by the reaction acting on the shaft when opening/closing the flexible tube. Detection is performed by the detection means using the force. More specifically, a flexible tube with a pressing body When the flow path is closed by pressing the body, movement of the pressing body is restricted. Therefore, the shaft As it rotates further, an upward reaction force is generated on this shaft, and this reaction force causes The shaft is pushed up. When the shaft is pushed up, the The upper elastic member is compressed. Therefore, pushing up the shaft and compressing the elastic member are prevented. By detecting with the detection means, it is possible to detect that the flexible tube has reached the closed position. Wear.

[0013] On the other hand, when rotating the shaft in the opposite direction to open the flow path in the flexible tube, the When the foot is rotated and the upper end of the pressing body comes into contact with the lower support bearing, it will move. is regulated. Further rotation of the shaft from this position causes the shaft to A reaction force is generated, and the shaft is pushed down by this reaction force. The shaft is pushed When lowered, the lower elastic member is compressed. Therefore, if the shaft is pushed down or By detecting compression of the flexible member by the detection means, the flexible tube reaches the open position. can detect that something has happened.

[0014] In this way, the detection hand uses the reaction force applied to the shaft when the flexible tube opens and closes. By operating the stage, the open/closed position of the channel can be detected.

[0015] In such valves, if the diameter, wall thickness, material, etc. of the flexible tube differ, the possibility of When opening and closing the flexible tube, the stroke of the pressing body fluctuates. On the other hand, the shaft A plurality of pressing bodies of different lengths are removably attached to the lower part of the holder. Therefore, the flexible tube Select a pressing body with an appropriate length according to the diameter, wall thickness, material, etc. of the shaft. By attaching it to the bottom, the pressure body can be adjusted according to the diameter, wall thickness, material, etc. of the flexible tube. You can optimize your stroke. In addition, based on the detected information on the opening and closing positions of the flow path, The timing of opening and closing of the passageway in the genital body can be precisely controlled.

[0016]

【Example】

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0017] FIG. 1 is a side sectional view showing an embodiment of the valve of the present invention, and FIG. 2 is a schematic plan view of FIG. 1. It is.

[0018] This valve is used for forward and reverse rotation of a stepping motor, etc. installed in frame 1. possible drive motor 2 and a first gear mounted on the rotating shaft 3 of this drive motor 2 4a, a second gear 4b meshing with the first gear 4a, and a second gear 4b. It has a shaft 5 attached to.

[0019] A threaded portion 6a is formed on the outer surface of the lower part of the shaft 5. A threaded portion 6b of the pressing body 7 is screwed into the threaded portion 6a. This rotation of the pressing body 7 is controlled. In order to control the pressure, a cylindrical shape formed in the frame 1 is provided in the axial direction of the side part of the pressing body 7. A slidable convex portion 8 is formed along a guide groove 10 formed on the inner wall of the casing 9. It is. This convex part 8, the guide groove 10, and the screw threaded part between the shaft 5 and the pressing body 7 The gear parts 6a and 6b are a conversion mechanism that converts the rotation of the shaft 5 into vertical movement of the pressing body 7. function.

[0020] The frame 1 includes a hollow flexible frame made of a flexible material such as silicone resin. A mounting portion 12 to which the tube body 11 is mounted is formed. This mounting part 12 is shown in FIG. Consisting of an opening formed in one side of the lower part of the frame 1 as shown has been done. The hollow flexible tube body 11 is connected to a base 1 formed at the bottom of the frame 1. 3 and rotatably attached to the frame 1 via a spring 14 It is attached to the frame 1 by a tube presser 15. The flexible tubular body presser 15 has upper and lower It is attached in an area that does not interfere with the moving pressing body 7. The flow inside the flexible tube 11 Fluids include not only culture fluids containing bacterial cells and drug solutions, and liquids such as water, but also gases and powders. is also available.

[0021] The tip of the pressing body 7 extends laterally and is formed into a U-shaped cross section, It is arranged perpendicular to the axial direction of the flexible tube 11. Flow path of the flexible tube 11 is closed by the pressing body 7 due to the rotation of the shaft 5 and the vertical movement of the pressing body 7. to be freed or released.

[0022] Furthermore, the shaft 5 is connected to upper and lower support frames 16a and 16 provided on the frame 1. b via upper and lower support bearings 17 and 18. Also, these A bearing 19 inserted and fixed to the shaft 5 is supported between the support frames 16a and 16b. It is supported and arranged by a holder 20. The support held by the lower support frame 16b The retaining bearing 18 is capable of contacting one end of the pressing body 7 and prevents the pressing body 7 from rising. to regulate. A switch operating member 21 is attached to the support body 20. Also, Spring 22a, 22b is provided.

[0023] The vertical position of the switch operating member 21 corresponds to the vertical movement of the shaft 5. Limit switches 23a and 23b are used to switch between rotation and stop of the drive motor 2. It is located.

[0024] In such a valve, the drive motor 2 drives the cylinder through the gears 4a and 4b. The shaft 5 is rotated, and the rotation of the shaft 5 is converted into the vertical movement of the pressing body 7 by a conversion mechanism. It can be converted to . The drive motor 2 is rotated normally to lower the pressing body 7 and the flexible tube 11 is lowered. When the flow path is closed, the movement of the pressing body 7 is restricted by the base 13. and, When the pressing body 7 attempts to descend further due to the rotation of the shaft 5, the shaft 5 The shaft 5 and the switch operating member 21 are pushed up by the reaction force in the direction. , the spring 22a is compressed and the switch operating member 21 is the upper limit switch. 23a. The closed position of the flexible tube 11 is between the switch operating member 21 and the limit. It is detected by contact with the closed position switch 23a, and based on this closed position detection information. , the rotation of the drive motor 2 stops.

[0025] On the other hand, the drive motor 2 is reversed to move the pressing body 7 away from the flexible tubular body 11, and the When opening the passage, the upward movement of the pressing body 7 is regulated by the lower support bearing 18. Ru. When the drive motor 2 further reverses, a downward reaction force acts on the shaft 5, The shaft and the switch operating member 21 are pushed down, and the switch operating member 21 is It comes into contact with the lower limit switch 23b, and the open position of the flexible tube body 11 is detected. Ru. The rotation of the drive motor 2 is stopped based on this open position detection information.

[0026] As mentioned above, in this example, the detection means includes the support 2 that supports the bearing 19. 0 and the upper and lower parts of this switch operating member 21 It is composed of switches 23a and 23b arranged at the same position.

[0027] Note that when using flexible tubes 11 with different diameters, wall thicknesses, materials, etc., one push When these flexible tube bodies 11 are pressed or released by a pressure body, it takes time to open and close them. It may take some time. Therefore, in this embodiment, as shown in FIGS. 3 and 4, For example, when dealing with flexible tubes 11a and 11b having different diameters, A plurality of pressing bodies 7a and 7b having different lengths are screwed onto the threaded portion 6a of the shaft 5. ing. Note that each of the pressing bodies 7a and 7b having a different length from the pressing body 7 is the same as above. As in, rotation is regulated.

[0028] In such a valve, a plurality of pressing bodies 7a and 7b of different lengths are attached to the shaft 5. Since it can be attached to and detached from the threaded portion 6a, it is possible to adjust the diameter of the flexible tube 11, 11a, 11b, etc. Even if the You can optimize your body stroke. Therefore, the flow of flexible tubes 11, 11a, 11b Detects the opening/closing position of the road quickly and accurately, ensuring proper switch switching timing can be controlled.

[0029] Further, the rotation of the drive motor 2 is controlled by the pressing bodies 7, 7a, 7a, 6b, and the screws 6a, 6b. 7b's vertical movement with high accuracy, and the mobility of the pressing bodies 7, 7a, 7b can be converted to the resolution. You can make fine adjustments. In addition, the vertical direction, mobility and moving speed of the pressing bodies 7, 7a, 7b The rotational speed can be adjusted by the rotational direction, rotational speed, and rotational speed of the drive motor 2. Accurately control the flow rate and pressure of the fluid flowing inside the flexible tubes 11, 11a, 11b. Can be controlled.

[0030] Furthermore, a part of the flexible tube bodies 11, 11a, 11b is made to function as a valve part. Therefore, only the inner surfaces of the flexible tubes 11, 11a, and 11b become the wetted parts. , excellent hygienic properties.

[0031] Note that the frame 1 can be used as long as the flexible tubes 11, 11a, and 11b can be attached. stomach. For example, insertion holes through which the flexible tube 11 can be inserted are formed on both sides of the frame 1. It's okay.

[0032] Generally, the flow rate and pressure of the fluid are proportional to the degree of opening of the flexible tubes 11, 11a, 11b. For example, a valve has the following characteristics. In other words, the pressing body If the degree of pressure caused by The opening area of the genital body is not very small, and the changes in flow rate and pressure are small. stop Therefore, after the flexible tube is deformed to a certain extent, even if the degree of compressive deformation is small, it will not open. The mouth area changes greatly, resulting in large changes in flow rate and pressure. Having such characteristics In order to finely adjust the flow rate and pressure in a flexible tube body, it is necessary to adjust the amount of movement of the pressing body. It is necessary to miniaturize.

[0033] In order to minimize the amount of movement of the pressing body, the motor capable of forward and reverse rotation is used to control the flow rate. Control motors that can be adjusted steplessly with high precision, especially stepping motors and servo motors. It is preferable to use data. When using such a control motor, rotation speed control is required. and the direction of rotation is easy to control. Especially in the case of a stepping motor, the drive rotation Since it can rotate according to the number of command pulses from the road, the rotation angle resolution is high and the pressing body The amount of movement can be controlled with precision.

[0034] Furthermore, if the number of teeth of the gears 4a and 4b is changed and a motor capable of forward and reverse rotation is used in combination, The moving speed of the pressing body can be slowed down or accelerated, and the moving speed of the pressing body when opening and closing the flow path can be further increased. can be controlled with high precision.

[0035] In order to restrict the rotation of the pressing bodies 7, 7a, 7b, the embodiment shown in FIG. Conversely, a convex portion is formed on the inner wall of the cylindrical casing 9, and this convex portion is formed on the pressing bodies 7, 7a, 7b. A sliding groove in which the convex portion can slide may be formed. Note that the pressing bodies 7, 7a, 7b are Not limited to the casing 9 mentioned above, but also an upright structure having a guide groove etc. formed on the side of the pressing body. Rotation may be regulated in relation to a rotation regulating member such as a piece.

[0036] In addition, in order to control the amount of movement of the pressing body with more precision, the shaft 5 and the pressing body 7 are , 7a, 7b, it is preferable to improve the screw precision of the threaded portions 6a, 6b. highly accurate When configuring the conversion mechanism using screws, the rotation speed of a stepping motor, etc. In combination with control, the resolution of the mobility of the pressing body can be further improved.

[0037] In addition, in order to prevent the pressing body from vertically displacing due to reaction force, It is preferable that the deflection angle is 6° or less, which is the self-locking angle. At an angle like this When forming a screw, it is necessary to prevent the screw from loosening and to reliably hold the moving position of the pressing body. Wear. In addition, in order to prevent the screws from loosening even if external forces such as vibrations are applied to the flow path system, For example, the torque due to the magnetic attraction and repulsion of a stepping motor, Either the detent torque when no power is applied or the holding torque when power is applied. Also available.

[0038] The conversion mechanism may be any mechanism that converts rotation into vertical movement, for example, a rotatable system. A cam attached to the shaft, a spiral groove formed on this cam, and a slider that slides into this spiral groove. It may be constructed of a movably arranged slider and a pressing body attached to the slider.

[0039] The plurality of pressing bodies 7, 7a, 7b of different lengths are not limited to screwing means, but can also be used for converting mechanisms. It is sufficient as long as it can be attached to and detached from the lower part of the shaft. These pressing bodies 7, 7a, 7b are A pressing portion having a U-shaped cross section and extending across the flexible tube body 11 is formed at its tip. It is preferable to The lengths of the pressing parts of the plurality of pressing bodies 7, 7a, 7b having different lengths are as follows: It can be selected depending on the diameter, wall thickness, material, etc. of the flexible tube 11. Further, the pressing body 7 , 7a, 7b are not limited to a substantially U-shaped cross section, and may have various shapes.

[0040] Furthermore, a spring disposed on the shaft between the vertical support frame and the bearing The spring pressure of the rings 22a and 22b may be adjusted. In this case, the flow path of the flexible tube 11 Create a limit switch for the movement of the pressing body in the closing direction and opening direction. You can adjust the reaction force that acts on the shaft when moving it.

[0041] Note that the elastic member is not limited to the springs 22a and 22b, and may be, for example, a plate. It may be anything that biases, such as a spring.

[0042] The opening/closing position of the flow path of the flexible tube is based on the position of the switch operating member. As long as it can be detected, an optical sensor may be used instead of the limit switch as the detection means. You may use a sa, etc.

[0043] Furthermore, a switch actuating member mounted on the support is not necessarily required. In other words, when the shaft rotates beyond the closed position and open position of the flow path, each of the above The shaft moves in the vertical direction against the biasing force of the elastic member. Take advantage of this The shaft is equipped with optical sensors, acceleration sensors, etc. that detect the movement and speed of the shaft. If the shaft is placed facing the This makes it possible to detect the opening/closing degree and opening/closing position of the flow path of the flexible tube. Also, Bearin If a pressure sensor is placed between the support frame or the elastic member, the movement of the shaft can be prevented. Changes in the biasing force of the elastic member that occur with the movement, and ultimately the opening/closing position of the flow path. It can be detected by a force sensor. In this case, pressure may be applied to both sides of the bearing or the upper and lower support frames. Once the sensors are in place, the Therefore, the direction of movement of the shaft and, in turn, the direction of rotation of the drive motor can be detected. follow The direction of rotation of the drive motor can be controlled. In addition, the shaft is measured by the acceleration sensor. Controls the rotation direction of the drive motor based on the moving speed and pressure changes detected by the pressure sensor. In this case, the detection value detected by the sensor is passed through a differentiation circuit to It may also be applied to a switch circuit that controls the rotation.

[0044] Such valves do not have functional parts such as a valve seat or valve inside the pipe as in the past. The flexible tube is deformed by the pressure of the pressing body, and a part of the flexible tube is bent. It can function as a lube. Therefore, use a joint to connect the valve and the pipe body. There is no need to continue the process, and there is less risk of contamination of the flexible tube. In addition, the flexible tube body Since it can be attached to a frame, a flow path system can be configured quickly.

[0045] Furthermore, by moving the pressing body up and down with the driving means, the opening degree of the flexible tube can be adjusted. In other words, the flow rate and pressure of the fluid flowing through the flexible tube can be adjusted.

[0046] In addition, since the valve can be easily attached to the flexible tube, it can be opened and closed a specified number of times. After that, by shifting the valve position or the pressing position of the flexible tube, the flexible tube can be used for a long period of time.

[0047] The present invention can be applied to various flexible tubes, and is particularly suitable for small diameter flexible tubes. can.

[0048]

[Effect of the idea]

The valve of this invention can open the flow path even if the diameter, wall thickness, and material of the flexible tube differ. The closed position can be properly detected, and the opening and closing of the channels in the channel system can be quickly controlled.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing one embodiment of the valve of the present invention.

FIG. 2 is a schematic plan view of FIG. 1;

FIG. 3 is a schematic cross-sectional view showing essential parts of the present invention.

FIG. 4 is a schematic cross-sectional view showing essential parts of the present invention.

FIG. 5 is a sectional view showing a conventional valve.

[Explanation of symbols]

1...Casing 2...Drive motor 5...Shaft 6a, 6b...screw part 7, 7a, 7b...pressing body 8...Protrusion 10...Guide groove 11, 11a, 11b...flexible tube body 16a, 16b...support frame 17, 18...Support bearing 19...Bearing 20...Support 21...Switch operating member 22a, 22b...Spring 23a, 23b...Limit switch

Claims (1)

[Scope of utility model registration request] 1. A frame to which a flexible tubular body can be mounted, a drive means disposed within the frame, and a frame rotatable by the drive means and rotatable via support bearings on upper and lower support frames of the frame. a shaft disposed in the shaft, a bearing inserted and fixed into the shaft and disposed between the upper and lower support frames, an elastic member disposed between the bearing and the upper and lower support frames, and pressing the rotation of the shaft. It has a conversion mechanism for converting vertical movement of the body, a pressing body attached to the lower part of the shaft via the conversion mechanism, and a detection means for detecting opening/closing of the flexible tube body. A valve that has multiple press bodies of different lengths that can be attached and removed at the bottom.