Electromagnetic pinch valve with signal feedback

Abstract

The utility model discloses an electromagnetic pinch valve with a signal feedback function, and aims to overcome the defects that an existing pinch valve lacks feedback, and whether movement meets the expectation or not is difficult to determine. The electromagnetic valve comprises a coil, a valve element, an armature, a detection needle and an optocoupler sensor, the armature and the valve element are arranged in the axial direction, the armature is configured to be capable of getting close to the valve element under the magnetic force generated by the coil and getting away from the valve element through an elastic piece, and the detection needle is fixedly installed on the armature. The detection needle enters the detection range of the optical coupling sensor, and the optical coupling sensor outputs an electric signal representing the motion state of the armature. By providing the detection needle and the optocoupler sensor which move synchronously with the moving part, the monitoring function of the pinch valve can be realized by only one sensor.

Description

Technical Field

[0001] The utility model relates to the field of valve body control, and more specifically, to an electromagnetic pinch valve with signal feedback. Background Art

[0002] A pinch valve can switch the on-off state of a flexible pipe body. Specifically, it applies pressure to the flexible pipe body in the radial direction, forcing the flexible pipe body to deform, affecting its cross-sectional size, so that the flexible pipe body loses its connectivity. After the pinch valve resets and no longer applies pressure to the flexible pipe body, the flexible pipe body elastically resets and restores its connectivity.

[0003] The power of the pinch valve is electromagnetic force, and the movement of the armature in the solenoid valve drives the pressure application structure to apply pressure to the flexible pipe body. The disadvantage of this device is that there is a certain probability that the armature does not move as expected after being energized, resulting in the on-off state of the flexible pipe body not matching the expectation. The user has to enter the site, which affects the personal safety of the user.

[0004] Based on the current situation, there is an urgent need for a pinch valve that can provide a feedback signal for the movement to ensure that the movement of the armature is consistent with the expectation. Summary of the Invention

[0005] The utility model overcomes the deficiency that the existing pinch valve lacks feedback and it is difficult to determine whether the movement meets the expectation, and provides an electromagnetic pinch valve with signal feedback, which can provide a feedback movement signal.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An electromagnetic pinch valve with signal feedback includes a coil, a valve core, an armature, a detection needle and an optocoupler sensor. The armature and the valve core are arranged axially. The armature is configured to be able to approach the valve core under the magnetic force generated by the coil and move away from the valve core through an elastic member. The detection needle is fixedly installed on the armature. When the armature approaches the valve core, the detection needle enters the detection range of the optocoupler sensor, and the optocoupler sensor outputs an electrical signal representing the movement state of the armature.

[0008] The electromagnetic pinch valve uses electromagnetic force as the driving force, generates axial magnetic force by the coil wound around the valve core, adsorbs the ferromagnetic armature, and the pressure-applying component in the background technology moves synchronously with the armature. In order to detect the movement of the component, it can be judged by the movement of the armature moving synchronously therewith. The detection needle is fixedly connected to the armature and can move synchronously with the armature. On the basis of the existing solenoid valve, this application is provided with an optocoupler sensor. Through the design of the structure, when the detection needle moves, it can reach the detection range of the optocoupler sensor, cover the light transmission in the optocoupler sensor, thereby converting the position signal into an electrical signal, and then transmitting the signal to the upper computer by wired or wireless means, so that the user does not need to monitor the movement state of the pressure-applying component on-site, which is more convenient and safe.

[0009] This application only requires an optocoupler sensor and a cylindrical pin as the detection needle, with low cost, convenient installation and easy transformation of the existing production line.

[0010] Preferably, a through hole is provided at the axial center position of the valve core, a push rod is fixedly connected to the top of the armature corresponding to the through hole, a connection hole coaxial with the through hole is provided at the top of the push rod, and the detection needle is installed in the connection hole, and the installation of the detection needle is realized through the above structure.

[0011] Preferably, a hollow adapter sleeve is threadedly connected to the through hole near the top position, an elastic member is abutted between the adapter sleeve and the push rod, the detection needle passes through the adapter sleeve and extends out of the valve core, and the elastic member is installed and positioned through the above structure to provide the elastic function of the elastic member; and positioning is provided in the form of a sleeve to provide the extending function of the detection needle.

[0012] Preferably, a contact block is provided at one end of the armature close to the valve core, the contact block is frustum-shaped, and a contact hole with a large outer and a small inner is provided on the valve core. When the armature moves towards the valve core, the contact block is inserted into the contact hole. The frustum with a large bottom and a small top and the contact hole with a large outer and a small inner make it stable during the lifting process of the armature approaching the valve core, avoid shaking, and the above structure also plays a guiding role, making it easier for the contact block to be inserted into the contact hole.

[0013] Preferably, a piston and a needle roller are further included. The piston is fixedly connected to the end of the armature far from the valve core. The piston can approach or move away from the needle roller with the armature to switch the on-off of the flexible pipe body arranged between the piston and the needle roller. The displaceable piston and the fixedly arranged needle roller realize the pressure-applying function on the flexible pipe fitting described above, and the piston moves synchronously with the armature.

[0014] Preferably, an upper shell, a lower shell and a valve body are sequentially fixedly connected along the axis. The valve core and the armature are installed in the lower shell, the optocoupler sensor is installed in the upper shell through a PCB board, and the piston is slidably connected in the valve body.

[0015] Preferably, the valve body is provided with a through hole in the radial direction for passing a flexible tube body. The through hole also provides a positioning function for the flexible tube body, so that the flexible tube body passing through the through hole is necessarily located between the piston and the needle roller.

[0016] Preferably, one end of the piston close to the needle roller is small, and the end far from the needle roller is large, and the bottom of the piston is flat. This structure increases the pressure under the same pressure, and the flat bottom reduces the probability of damaging the flexible tube body.

[0017] Preferably, the needle roller is rotatably connected to the valve body. When the flexible tube body is inserted into the through hole, it is supported by the needle roller and undergoes rolling friction.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] By providing a detection needle and an optocoupler sensor that move synchronously with the moving parts, the monitoring function of the pinch valve can be realized with only one sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the present utility model;

[0021] Figure 2 is a cross-sectional schematic diagram of the present utility model;

[0022] In the figure:

[0023] coil 1, valve core 2, detection needle 3, optocoupler sensor 4, elastic member 5, push rod 6, connection hole 7, adapter sleeve 8, abutting block 9, abutting hole 10, piston 11, needle roller 12, upper housing 13, lower housing 14, valve body 15, through hole 16, PCB board 17. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes the present disclosure in conjunction with the drawings and embodiments.

[0025] It should be noted that the following detailed description is illustrative and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relational terms determined for the convenience of describing the structural relationship of each component or element of the present disclosure, and do not specifically refer to any component or element in the present disclosure, and should not be construed as a limitation to the present disclosure.

[0028] In the present disclosure, terms such as "fixed connection", "connected", "joined" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meaning of the above terms in the present disclosure can be determined according to specific circumstances, and should not be construed as a limitation to the present disclosure.

[0029] Embodiment:

[0030] An electromagnetic pinch valve with signal feedback, as shown in Figure 1 、 2 , includes a coil 1, a valve core 2, an armature, a detection needle 3 and an optocoupler sensor 4. The armature and the valve core 2 are arranged along the axial position. The armature is configured to be able to approach the valve core 2 under the magnetic force generated by the coil 1 and move away from the valve core 2 through an elastic member 5. The detection needle 3 is fixedly installed on the armature. When the armature approaches the valve core 2, the detection needle 3 enters the detection range of the optocoupler sensor 4, and the optocoupler sensor 4 outputs an electrical signal representing the movement state of the armature.

[0031] An upper housing 13, a lower housing 14 and a valve body 15 fixedly connected in sequence along the axis. The valve core 2 and the armature are installed in the lower housing 14. The optocoupler sensor 4 is installed in the upper housing 13 through a PCB board 17. The piston 11 is slidably connected in the valve body 15. An opening for the wire harness connected to the PCB board 17 to extend out is provided at the top of the upper housing 13.

[0032] The optocoupler sensor 4 has a jack for the detection needle 3 to be inserted into. The inner diameter of the jack is larger than the outer diameter of the detection needle 3, so that the jack does not collide with the detection needle 3.

[0033] The optocoupler sensor 4 has a light-emitting point on the inner wall of the jack and a light-receiving point on the other side. The aforementioned detection needle 3 can reach a position flush with the light-emitting point when moving with the armature, thereby blocking the light so that the light cannot reach the light-receiving point, thereby generating a corresponding electrical signal.

[0034] The upper housing 13 and the lower housing 14 are fixedly connected by fasteners. Specifically, the bottom wall of the upper housing 13 and the top wall of the lower housing 14 have corresponding hole positions, and a number of circumferentially arranged hole positions are used to cooperate with the fasteners to be fixedly connected in the form of threads. Among them, the top cover of the upper housing 13 is of a detachable design. After the connection between the upper housing 13 and the lower housing 14 is completed, the top cover of the upper housing 13 is installed, and the installation forms include threaded connection, snap fit, etc.

[0035] A coil 1 is sleeved outside the valve core 2. The coil 1 passes through the upper housing 13 from the opening between the upper housing 13 and the lower housing 14 and extends out from the top, serving as a power line.

[0036] The installation and positioning of the detection needle 3 are as follows: The valve core 2 is provided with a through hole at the axial center position. A push rod 6 is fixedly connected to the top of the armature corresponding to the through hole. A connection hole 7 coaxial with the through hole is provided at the top of the push rod 6. The detection needle 3 is installed in the connection hole 7, and the installation of the detection needle 3 is realized through the above structure. A hollow adapter sleeve 8 is threadedly connected to the through hole near the top position. An elastic member 5 abuts between the adapter sleeve 8 and the push rod 6. The detection needle 3 passes through the adapter sleeve 8 and extends outside the valve core 2. The elastic member 5 is installed and positioned through the above structure to provide the elastic function of the elastic member 5; and positioning is provided in the form of a sleeve to provide the extending function of the detection needle 3.

[0037] An abutting block 9 is provided at one end of the armature close to the valve core 2. The abutting block 9 is frustum-shaped. An abutting hole 10 with a large outer and small inner diameter is provided on the valve core 2. When the armature moves towards the valve core 2, the abutting block 9 is inserted into the abutting hole 10. The frustum with a large lower and small upper diameter and the abutting hole 10 with a large outer and small inner diameter ensure stability and avoid shaking during the lifting process of the armature close to the valve core 2. The above structure also plays a guiding role, making it easier for the abutting block 9 to be inserted into the abutting hole 10.

[0038] The valve body 15 is provided with a through hole 16 in the radial direction for passing a flexible tube body. The through hole 16 also provides a positioning function for the flexible tube body, so that the flexible tube body passing through the through hole 16 is necessarily located between the piston 11 and the needle roller 12. It also includes a piston 11 and a needle roller 12. The piston 11 is fixedly connected to one end of the armature away from the valve core 2. The piston 11 can move closer to or away from the needle roller 12 along with the armature to switch the on-off of the flexible tube body arranged between the piston 11 and the needle roller 12. The displaceable piston 11 and the fixedly arranged needle roller 12 realize the pressing function on the flexible pipe fitting described above, and the piston 11 moves synchronously with the armature. One end of the piston 11 close to the needle roller 12 is small, and the end away from the needle roller 12 is large. The bottom of the piston 11 is a plane. The above structure increases the pressure under the same pressure, and the plane bottom reduces the probability of damaging the flexible tube body. The needle roller 12 is rotatably connected to the valve body 15. The rotational connection enables the needle roller to rotate along its axis. The needle roller 12 and the piston 11 are located at both ends in the radial direction of the through hole. The flexible tube body is inserted into the through hole 16 and is supported by the needle roller 12 for rolling friction.

[0039] The electromagnetic pinch valve uses electromagnetic force as the power, generates axial magnetic force by the coil 1 wound around the valve core 2, adsorbs the ferromagnetic armature, and the pressing component in the background technology moves synchronously with the armature. In order to detect the movement of the component, it can be judged by the movement of the armature moving synchronously with it. The detection needle 3 is fixedly connected to the armature and can move synchronously with the armature. In the present application, an optocoupler sensor 4 is arranged on the basis of the existing solenoid valve. Through the design of the structure, when the detection needle 3 moves, it can reach the detection range of the optocoupler sensor 4, cover the light transmission in the optocoupler sensor 4, thereby converting the position signal into an electrical signal, and then transmitting the signal to the upper computer in a wired or wireless manner, so that the user does not need to monitor the movement state of the pressing component on site, which is more convenient and safe.

[0040] The present application only requires an optocoupler sensor 4 and a cylindrical pin as the detection needle 3, with low cost, convenient installation and easy transformation of the existing production line.

[0041] The working process of the device is as follows: the flexible tube body passes through the through hole 16 and enters between the roller needle 12 and the piston 11; then when the passage of the flexible tube body needs to be opened, the coil 1 is energized, and the generated magnetic force attracts the armature, and the armature overcomes the elastic force of the elastic member 5, drives the push rod 6, the detection needle 3, and the piston 11 to move, and moves upward as a whole. During this process, the detection needle 3 enters the detection range of the optical coupling sensor 4, and the optical coupling sensor 4 sends a feedback signal. At the same time, the piston 11 is lifted and reset under the elasticity of the flexible tube body itself; on the contrary, when the coil 1 loses power, the magnetic force disappears, the elastic force pushes the armature to reset, the piston 11 moves downward, and pressure is applied to the flexible tube body, forcing the flexible tube body to deform and reduce its cross-sectional area, thereby realizing flow interruption. At the same time, the detection needle 3 moves downward and leaves the position of the optical coupling sensor 4, and the optical coupling sensor 4 sends a corresponding feedback signal.

[0042] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. An electromagnetic pinch valve with signal feedback, characterized in that: It includes a coil, a valve core, an armature, a detection needle and an optical coupling sensor. The armature and the valve core are arranged in an axial position. The armature is configured to be able to approach the valve core under the magnetic force generated by the coil and to be away from the valve core through an elastic member. The detection needle is fixedly mounted on the armature. When the armature approaches the valve core, the detection needle enters the detection range of the optical coupling sensor, and the optical coupling sensor outputs an electrical signal representing the movement state of the armature.

2. The electromagnetic pinch valve with signal feedback according to claim 1, characterized in that: The valve core is provided with a through hole at the axial position, the top of the armature is fixedly connected with a push rod corresponding to the through hole, the top of the push rod is provided with a connecting hole coaxial with the through hole, and the detection needle is installed in the connecting hole.

3. The electromagnetic pinch valve with signal feedback according to claim 2, characterized in that: A hollow adapter sleeve is threadedly connected to the through hole near the top, the elastic member abuts between the adapter sleeve and the push rod, and the detection needle passes through the adapter sleeve and extends out of the valve core.

4. The electromagnetic pinch valve with signal feedback according to claim 1, characterized in that: An abutment block is arranged at one end of the armature close to the valve core. The abutment block is in a truncated cone shape. An abutment hole with a larger outer side and a smaller inner side is arranged on the valve core. When the armature moves toward the valve core, the abutment block is inserted into the abutment hole.

5. The electromagnetic pinch valve with signal feedback according to claim 1, characterized in that: It also includes a piston and a needle roller. The piston is fixedly connected to the end of the armature away from the valve core. The piston can move closer to or farther away from the needle roller as the armature approaches or moves away from the needle roller to switch the flexible tube body arranged between the piston and the needle roller on and off.

6. The electromagnetic pinch valve with signal feedback according to claim 5, characterized in that: The piston is smaller at one end close to the needle roller and larger at one end away from the needle roller, and the bottom of the piston is a plane.

7. The electromagnetic pinch valve with signal feedback according to claim 5, characterized in that: The needle roller is rotatably connected to the valve body.

8. The electromagnetic pinch valve with signal feedback according to claim 7, characterized in that: The valve body is provided with a through hole in the radial direction for the flexible pipe body to pass through.

9. The electromagnetic pinch valve with signal feedback according to claim 5, characterized in that: It also includes an upper shell, a lower shell and a valve body which are fixedly connected in sequence along the axial direction. The valve core and the armature are installed in the lower shell. The optical coupling sensor is installed in the upper shell through a PCB board. The piston is slidably connected in the valve body.

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