Solenoid valve anti-rebound device and method

Abstract

The present application discloses an anti-rebound device and method for an electromagnetic valve, the device comprising a device body, an electromagnet, a sensor and a processor; a guide column is provided on the device body; the electromagnet is slidably provided on the guide column; the processor is electrically connected to the electromagnet and the sensor; the sensor is provided on the device body and is used to send an induction signal when it senses that the electromagnet has passed a preset distance; the processor is used to obtain the current direction of the electromagnet, the induction signal of the sensor and control the direction of the current flowing through the electromagnet; the processor is used to make the electromagnet flow current in the direction of attraction after obtaining the induction signal. Through this solution, after the electromagnet has passed the preset distance, the electromagnet can flow current in the direction of attraction, so that the electromagnet generates a force to move in the direction of attraction and slows down its speed, thereby preventing the electromagnet from sliding out of the guide column or causing a collision. Compared with the existing solenoid valve, the service life of the electromagnet can be effectively extended.

Description

Technical Field

[0001] The present application relates to the technical field of high-pressure injectors, and in particular to a solenoid valve anti-rebound device and method. Background Art

[0002] A high-pressure injector is a device that injects medication into a human vein at high pressure and speed. It typically consists of a liquid bottle, an infusion line, and a bottle holder. The medication is stored in the bottle, which is mounted on the bottle holder. The infusion line delivers the liquid from the bottle into the body, achieving drug delivery.

[0003] When switching pipelines in high-pressure injectors, a solenoid valve is required to control the flow of fluid between different pipelines. This solenoid valve typically contains a two-way holding electromagnet that controls the opening and closing of the valve. Existing two-way holding electromagnets are typically spring-loaded. Without additional buffering devices, the travel limiter of the electromagnet can collide with the electromagnet's housing, causing the electromagnet to rebound and shorten its lifespan. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a solenoid valve anti-rebound device and method for solving the problem of low life of the electromagnet of the solenoid valve in the existing high-pressure injector.

[0005] In order to achieve the above technical objectives, the first aspect of the present application provides a solenoid valve anti-rebound device, comprising: a device body, an electromagnet, a sensor and a processor;

[0006] A guide column is provided on the device body;

[0007] The electromagnet is slidably disposed on the guide post;

[0008] The processor is electrically connected to the electromagnet and the sensor;

[0009] The sensor is provided on the device body and is used to send out an induction signal when it senses that the electromagnet has passed a preset distance;

[0010] The processor is used to obtain the current direction of the electromagnet, the sensing signal of the sensor, and control the direction of the current flowing through the electromagnet;

[0011] The processor is used to make the electromagnet flow current in an attraction direction after acquiring the induction signal.

[0012] Furthermore, it also includes: a travel limiter;

[0013] The travel limiter is arranged on the guide column and is used to limit the ejection travel of the electromagnet.

[0014] Furthermore, the processor is further configured to obtain a start time T1 of the current flowing in the ejection direction of the electromagnet and a sensing time T2 of the sensor sending the sensing signal, and calculate a movement speed V of the electromagnet based on a time difference between the start time T1 and the sensing time T2;

[0015] The processor is further configured to control the time length T of the current flowing in the attraction direction of the electromagnet according to the movement speed V. 长 so that the electromagnet does not collide with the travel limiter during the pop-up process.

[0016] Furthermore, the travel limiting member is a nut and is threadedly connected to the guide column.

[0017] Furthermore, the sensor is a photoelectric switch.

[0018] Furthermore, it also includes: a blocking piece;

[0019] The blocking piece is fixedly connected to the electromagnet and is configured to slide along with the electromagnet;

[0020] The sensor senses whether the electromagnet has passed a preset distance by sensing whether the blocking piece is approaching.

[0021] Furthermore, one end of the sensor is in a U-shape, and a channel for the baffle to pass through is provided in the middle.

[0022] Furthermore, it also includes: a connecting rod and a valve pipe;

[0023] The device body is also provided with a support rod and a valve hole;

[0024] The valve tube is slidably disposed in the valve hole;

[0025] The middle portion of the connecting rod is rotatably connected to the support rod, and both ends are rotatably connected to the electromagnet and the valve pipe respectively.

[0026] Furthermore, the electromagnet, valve tube, connecting rod, guide column and valve hole each include three, and are distributed at intervals around the circumference.

[0027] A second aspect of the present application provides a solenoid valve anti-rebound method, which is applied to any of the above-mentioned devices;

[0028] The method comprises the following steps:

[0029] S1. Obtain the start time T of the current flowing in the ejection direction of the electromagnet;

[0030] S2. Determine whether the sensor is triggered. If so, obtain the sensing time T for the sensor to send the sensing signal;

[0031] S3, calculating the movement speed V of the electromagnet 20 by the start time T1, the induction time T2 and the length of the preset distance, and controlling the current flowing in the electromagnet in the attracting direction;

[0032] S4, controlling the time length T of the current flowing in the attraction direction of the electromagnet according to the movement speed V. 长 .

[0033] As can be seen from the above technical solutions, the present application provides a solenoid valve anti-rebound device and method, the device including a device body, an electromagnet, a sensor and a processor; a guide column is provided on the device body; the electromagnet can be slidably provided on the guide column; the processor is electrically connected to the electromagnet and the sensor; the sensor is provided on the device body, and is used to send an induction signal when it senses that the electromagnet has passed a preset distance; the processor is used to obtain the current direction of the electromagnet, the induction signal of the sensor and control the direction of the current flowing through the electromagnet; the processor is used to make the electromagnet flow current in the direction of attraction after obtaining the induction signal. Through this solution, after the electromagnet passes the preset distance, the electromagnet can flow current in the direction of attraction, so that the electromagnet generates a force to move in the direction of attraction and slows down the speed, thereby preventing the electromagnet from sliding out of the guide column or causing a collision. Compared with the existing solenoid valve, the service life of the electromagnet can be effectively extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 A top perspective view of an anti-rebound device for a solenoid valve provided in an embodiment of the present application;

[0036] Figure 2 A bottom perspective view of an anti-rebound device for a solenoid valve provided in an embodiment of the present application;

[0037] Figure 3 A flowchart of a solenoid valve anti-rebound method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions of the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection requested by this application.

[0039] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0040] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, replaceable connections, or integral connections. They can also refer to mechanical connections or electrical connections. They can also refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0041] See also Figure 1 The first aspect of the present application provided in the embodiment of the present application provides an anti-rebound device for an electromagnetic valve, comprising: a device body 10, an electromagnet 20, a sensor 30 and a processor (not shown in the figure); a guide column 11 is provided on the device body 10; the electromagnet 20 is slidably provided on the guide column 11; the processor is electrically connected to the electromagnet 20 and the sensor 30; the sensor 30 is provided on the device body 10, and is used to send a sensing signal when it senses that the electromagnet 20 has passed a preset distance; the processor is used to obtain the current direction of the electromagnet 20, the sensing signal of the sensor 30 and the direction of controlling the current flowing through the electromagnet 20; the processor is used to make the electromagnet 20 flow current in the attraction direction after obtaining the sensing signal.

[0042] Specifically, the processor is electrically connected to both the electromagnet 20 and the inductor 30 via wires and other connectors. When a current flows through the electromagnet 20 in the ejection direction, the electromagnet 20 slides in the ejection direction, opening the solenoid valve. Similarly, when a current flows through the electromagnet 20 in the closing direction, the electromagnet 20 slides in the closing direction, closing the solenoid valve. The processor's ability to control the direction of current flowing through the electromagnet 20 means that the processor can control the flow of current through the electromagnet 20 in either the ejection direction or the closing direction.

[0043] In the solenoid valve anti-rebound device provided in this embodiment, after the electromagnet 20 is ejected, the sensor 30 can sense whether the electromagnet 20 has passed a preset distance, and after the electromagnet 20 slides through the preset distance, the electromagnet 20 is caused to flow with current in the direction of attraction, thereby causing the electromagnet 20 to generate a buffering force in the opposite direction of the ejection direction, preventing the electromagnet 20 from colliding or sliding off the guide column 11, thereby preventing the electromagnet 20 from being damaged by the collision. In addition, compared to the method of using only springs for buffering, the buffering force range that the spring can provide after installation is relatively fixed, making it difficult to adapt to solenoid valves of different sizes and prone to elastic fatigue over time; this embodiment provides buffering force by controlling the current direction of the electromagnet 20, which can adapt to solenoid valves of different sizes and can be used stably for a long time.

[0044] In one embodiment, the system further includes a travel limiter 40 . The travel limiter 40 is disposed on the guide post 11 and is used to limit the ejection travel of the electromagnet 20 .

[0045] The travel limiter 40 can prevent the electromagnet 20 from sliding out of the guide post 11 when the processor is not activated.

[0046] As a further improvement, the processor is further configured to obtain the start time T1 of the current flowing in the ejection direction of the electromagnet 20 and the induction time T2 of the induction signal emitted by the sensor 30, and calculate the movement speed V of the electromagnet 20 based on the time difference between the start time T1 and the induction time T2; the processor is further configured to control the time length T of the current flowing in the pull-in direction of the electromagnet 20 based on the movement speed V. 长 , so that the electromagnet 20 does not collide with the travel limiter 40 during the ejection process.

[0047] Specifically, the distance between the electromagnet 20 and the sensor 30 after the electromagnet 20 has traveled a predetermined distance is fixed, so the speed V of the electromagnet 20 can be calculated after obtaining the sensing time T2 and the start time T1. Then, the time length T is controlled according to the speed V. 长 , which can ensure that the speed of the electromagnet 20 is reduced to 0 before contacting the stroke limiter 40.

[0048] It should be noted that the time length T 长It is also related to the elastic coefficient of the electromagnetic spring in the electromagnet 20. Existing solenoid valves generally have a certain spring system; therefore, the initial length of the electromagnetic spring, the stretched length of the electromagnetic spring when the electromagnet 20 passes a preset distance, and the electromagnetic force F generated when the electromagnet 20 flows through the pull-in current are all related to the electromagnetic force F. 吸合 The size of can be measured in the application. After measuring the motion speed V, you can 吸合 The time t required to decelerate the electromagnet 20 from the speed V to 0 is calculated based on the size of the electromagnetic spring, the tensile length of the electromagnetic spring and the elastic coefficient of the electromagnetic spring. Then, the time length T for the current flowing in the attraction direction of the electromagnet 20 is controlled. 长 It can be equal to time t.

[0049] Furthermore, the travel limiter 40 is a nut and is threadedly connected to the guide post 11 .

[0050] Specifically, the guide column 11 may be provided with a thread, so that the travel limiter 40 can rotate and adjust its position on the guide column 11 according to the electromagnet 20 being ejected to the stop position to avoid collision with the electromagnet 20.

[0051] In one embodiment, the sensor 30 is a photoelectric switch, and the sensing signal is a broadcast signal.

[0052] In one embodiment, the device further includes: a baffle 60 ; the baffle 60 is fixedly connected to the electromagnet 20 and is used to slide along with the electromagnet 20 ; the sensor 30 senses whether the electromagnet 20 has passed a preset distance by sensing whether the baffle 60 is close.

[0053] Furthermore, one end of the sensor 30 is in a U-shape, and a channel 31 is provided in the middle for the blocking piece 60 to pass through.

[0054] Specifically, by setting one end of the sensor 30 to be in a U-shape, when the baffle 60 passes through the channel 31, both ends of the baffle 60 can be sensed, thereby improving the accuracy of the sensing.

[0055] In one embodiment, it also includes: a connecting rod 70 and a valve tube 80; a support rod 12 and a valve hole 13 are also provided on the device body 10; the valve tube 80 can be slidably set in the valve hole 13; the middle part of the connecting rod 70 can be rotatably connected to the support rod 12, and the two ends can be rotatably connected to the electromagnet 20 and the valve tube 80 respectively.

[0056] Specifically, when the electromagnet 20 slides in the ejection direction, it pushes the connecting rod 70 to Figure 1 The connecting rod 70 rotates counterclockwise in the middle, and the rotating connecting rod 70 drives the valve tube 80 to slide upward to open the valve hole 13. Correspondingly, when the electromagnet 20 slides in the attraction direction, it pushes the connecting rod 70 to Figure 1The connecting rod 70 rotates clockwise in the middle, and the rotating connecting rod 70 drives the valve tube 80 to slide downward to close the valve hole 13.

[0057] In one embodiment, the electromagnet 20 , the valve tube 80 , the connecting rod 70 , the guide post 11 and the valve hole 13 are each provided in three pieces and are distributed at intervals around the circumference.

[0058] That is, in this embodiment, the solenoid valve used in the solenoid valve anti-rebound device is a four-way valve.

[0059] A second aspect of the present application provides a solenoid valve anti-rebound method, which is applied to any of the above devices;

[0060] See also Figure 3 , the method comprises the following steps:

[0061] S1. Obtain the start time T1 of the current flowing in the ejection direction through the electromagnet 20.

[0062] Specifically, when the electromagnet 20 is ready to be ejected, the processor controls the electromagnet 20 to flow current in the ejection direction.

[0063] S2. Determine whether the sensor 30 is triggered. If so, obtain the sensing time T2 when the sensor 30 sends the sensing signal.

[0064] S3. Calculate the movement speed V of the electromagnet 20 by the starting time T1, the induction time T2 and the length of the preset distance, and control the current flowing in the attraction direction of the electromagnet 20.

[0065] S4, according to the movement speed V, the time length T of the current flowing in the attraction direction of the electromagnet 20 is controlled 长 .

[0066] Electromagnet 20 Flow T 长 After the current in the attracting direction for a certain length of time, the speed is just reduced from V to 0.

[0067] The above are only preferred embodiments of the present application and are not intended to limit the present invention. Although the present application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the aforementioned examples or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A solenoid valve anti-rebound device, characterized in that: Including: A device main body (10), an electromagnet (20), an inductor (30), a stroke limiter (40) and a processor; A guide post (11) is provided on the device main body (10); The electromagnet (20) is slidably arranged on the guide post (11); The processor is electrically connected to both the electromagnet (20) and the inductor (30); The inductor (30) is arranged on the device main body (10) and is used for sending an induction signal when it senses that the electromagnet (20) has passed a preset distance; The processor is used for obtaining the current direction of the electromagnet (20), the induction signal of the inductor (30) and controlling the direction of the current flowing through the electromagnet (20); After obtaining the induction signal, the processor is used for making the electromagnet (20) conduct current in the attracting direction; The stroke limiter (40) is arranged on the guide post (11) and is used for limiting the ejection stroke of the electromagnet (20); The processor is further used for obtaining the start time T1 when the electromagnet (20) conducts current in the ejection direction and the induction time T2 when the inductor (30) sends out an induction signal, and calculating the moving speed V of the electromagnet (20) according to the time difference between the start time T1 and the induction time T2; The processor is further configured to control the time length T of the current flowing in the attraction direction of the electromagnet (20) according to the movement speed V. 长 so that the electromagnet (20) does not collide with the travel limiter (40) during the ejection process.

2. The solenoid valve anti-rebound device according to claim 1, characterized in that: The stroke limiter (40) is a nut and is threadedly connected to the guide post (11).

3. The solenoid valve anti-rebound device according to claim 1, characterized in that:

4. The solenoid valve anti-rebound device according to claim 1, characterized in that: The inductor (30) is a photoelectric switch. It further includes: A baffle (60); The baffle (60) is fixedly connected to the electromagnet (20) and is used for sliding along with the electromagnet (20); 5. The solenoid valve anti-rebound device according to claim 4, characterized in that: The inductor (30) senses whether the electromagnet (20) has passed a preset distance by sensing whether the baffle (60) approaches.

6. The solenoid valve anti-rebound device according to claim 1, characterized in that: One end of the inductor (30) is U-shaped, and a channel (31) for the baffle (60) to pass through is provided in the middle. It further includes: A connecting rod (70) and a valve tube (80); A support rod (12) and a valve hole (13) are further provided on the device main body (10); The valve tube (80) is slidably arranged in the valve hole (13); 7. The solenoid valve anti-rebound device according to claim 6, characterized in that: The middle of the connecting rod (70) is rotatably connected to the support rod (12), and the two ends are respectively rotatably connected to the electromagnet (20) and the valve tube (80).

8. A solenoid valve anti-rebound method, characterized in that: There are three of the electromagnet (20), the valve tube (80), the connecting rod (70), the guide post (11) and the valve hole (13), and they are distributed at circumferential intervals. Applied to the device according to any one of claims 1-7; This method includes the following steps: S1. Obtain the start time T1 when the electromagnet (20) conducts current in the ejection direction; S2. Judge whether the inductor (30) is triggered. If so, obtain the induction time T2 when the inductor (30) sends out an induction signal; S3. Calculate the moving speed V of the electromagnet (20) through the start time T1, the induction time T2 and the length of the preset distance, and control the electromagnet (20) to conduct current in the attracting direction; S4, controlling the time length T of the current flowing in the attraction direction of the electromagnet (20) according to the movement speed V. 长 .

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