Suction knife and liquid suction assembly

Abstract

A kind of suction knife, including main body part, suction part and electromagnetic valve.The main body part includes first channel, the cross-sectional dimension of the first channel in different regions is different;Suction part and the main body part are connected, and the suction part includes second channel, the second channel and the first channel are communicated;Electromagnetic valve and the suction part are connected;The first channel is used for the first fluid flow, to form negative pressure in the second channel, the suction end of the suction part away from the main body part is suction end, the suction end is used to absorb second fluid to the second channel, and is merged with the first fluid, the electromagnetic valve is used to open or close the second channel according to whether the second fluid exists in suction end.This application also provides a kind of liquid suction assembly, the liquid suction assembly includes input pipeline, output pipeline and the suction knife.

Description

Technical Field

[0001] This application relates to the field of fixture technology, and more particularly to a suction knife and a liquid suction assembly. Background Technology

[0002] In circuit board manufacturing, etching solutions are applied to the pre-fabricated components. After the etching process, the chemicals need to be removed, otherwise it will affect the circuit board fabrication, such as impacting subsequent etching applications. Vacuum suction blades can be used to remove the chemicals. However, existing methods using multiple vacuum suction blades simultaneously to remove chemicals from pre-fabricated components at different stages of the process can lead to vacuum breaking, affecting the suction effectiveness of other vacuum suction blades. Figure 1 As shown, when suction knife 101 adsorbs the liquid on the circuit board preform 201, and suction knives 102 and 103 do not adsorb the liquid on the circuit board preform 202, due to the influence of suction knives 102 and 103, suction knife 101 has difficulty maintaining a vacuum state to adsorb the liquid, resulting in poor adsorption effect of suction knife 101. Utility Model Content

[0003] In view of this, it is necessary to provide a suction knife that reduces the mutual influence between the two parts in order to solve the above problems.

[0004] A suction knife includes a main body, an adsorption part, and a solenoid valve. The main body includes a first channel with different cross-sectional dimensions in different regions; the adsorption part is connected to the main body and includes a second channel that communicates with the first channel; the solenoid valve is connected to the adsorption part; the first channel is used for the flow of a first fluid to create a negative pressure in the second channel; the end of the adsorption part facing away from the main body is an adsorption end, which is used to adsorb a second fluid into the second channel and merge with the first fluid; the solenoid valve is used to open or close the second channel based on the presence of the second fluid at the adsorption end.

[0005] This application embodiment also provides a liquid suction assembly, which includes an input pipe, an output pipe, and the suction knife.

[0006] The suction knife provided in this application includes a main body, an adsorption part, and a solenoid valve. The main body includes a first channel with different cross-sectional dimensions in different regions. The adsorption part includes a second channel communicating with the first channel. When a first fluid is input into the first channel, the flow rate of the first fluid varies in different regions, with lower pressure in regions of lower flow rate. This creates a negative pressure in the second channel to adsorb the second fluid located at the adsorption end of the adsorption part. The solenoid valve can open or close the second channel depending on whether the second fluid is present at the adsorption end. This prevents the second fluid adsorbed in the second channel from flowing out from the adsorption end and keeps the second channel sealed, thereby reducing the impact on the adsorption performance of other suction knives. Attached Figure Description

[0007] Figure 1 A schematic diagram of the structure of a suction knife for adsorbing medicine, provided for related technologies.

[0008] Figure 2 This is a schematic diagram of the liquid absorption assembly provided in an embodiment of this application.

[0009] Figure 3 This is a schematic diagram of the suction knife provided in an embodiment of this application.

[0010] Figure 4 This is a cross-sectional schematic diagram of the suction knife provided in an embodiment of this application.

[0011] Figure 5 This is a cross-sectional schematic diagram of the suction knife adsorbing the second fluid according to an embodiment of this application.

[0012] Explanation of main component symbols Liquid suction assembly: 200; Input pipe: 210; Output pipe: 220; First fluid: 230; Second fluid: 240; Circuit board prefabricated parts: 201, 202; Suction knife: 100, 101, 102, 103; Main body: 10; First channel: 11; Input end: 111; Connecting section: 112; First zone: 1121; Middle zone: 1122; Second zone: 1123; Output end: 113; Adsorption part: 20; Adsorption end: 21; First adsorption port: 211; Second adsorption port: 212; Second channel: 22; Slot: 23; Solenoid valve: 30; Drive component: 31; Elastic component: 32; Moving component: 33; Sensor: 40; Check valve: 50; First end: 51; Second end: 52.

[0013] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this application; the described embodiments are merely some, not all, of the embodiments described in this application.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes all and any combination of one or more of the associated listed items.

[0016] In the various embodiments of this application, for ease of description and not limitation, the term "connection" used in the patent application specification and claims is not limited to physical or mechanical connections, whether direct or indirect. Terms such as "upper," "lower," "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0017] Please see Figure 2 , Figure 2 This is a schematic diagram of the liquid suction assembly 200 provided in an embodiment of this application. The liquid suction assembly 200 may include an input pipe 210, an output pipe 220, and at least one suction blade 100, wherein the suction blade 100 is connected to both the input pipe 210 and the output pipe 220. The input pipe 210 is used to input a first fluid 230 into the suction blade 100, and the first fluid 230 is discharged through the suction blade 100 to the output pipe 220. The suction blade 100 is also used to draw in a second fluid 240 and discharge the second fluid 240 and the first fluid 230 together into the output pipe 220. The output pipe 220 is used to discharge the first fluid 230 and the second fluid 240 that have passed through the suction blade 100. When the liquid suction assembly 200 includes multiple suction blades 100, the working states of the multiple suction blades 100 are independent of each other, reducing the impact on the adsorption effect of other suction blades 100.

[0018] In one specific embodiment, during the circuit board manufacturing process, a chemical solution (i.e., the second fluid 240) is applied to the circuit board preform 201 for etching. The etched solution needs to be removed after the reaction. By introducing the first fluid 230 into the suction blade 100, a negative pressure is created inside the suction blade 100 to adsorb excess etchant on the circuit board preform 201. Even if the circuit board preform 201 and circuit board preform 202 are not in the same process, the multiple suction blades 100 will not interfere with each other. The first fluid 230 and the second fluid 240 can have the same composition, and the second fluid 240 can be recycled.

[0019] Please see Figure 3 , Figure 4 and Figure 5 The suction knife 100 may include a main body 10, an adsorption part 20, and a solenoid valve 30. The main body 10 includes a first channel 11 for the flow of the first fluid 230. The adsorption part 20 is connected to the main body 10 and includes a second channel 22 that communicates with the first channel 11. The end of the adsorption part 20 facing away from the main body 10 is an adsorption end 21, which is used to adsorb a second fluid 240. The second fluid 240 enters the second channel 22 and is transported to the first channel 11, where it merges with the first fluid 230. The cross-sectional dimensions of the first channel 11 are different in different regions. When the first fluid 230 flows in the first channel 11, the flow rate of the first fluid 230 is different in different regions. The pressure is lower in regions with faster flow rates, creating a negative pressure in the second channel 22. Under the action of this negative pressure, the second fluid 240 can enter the second channel 22 to achieve adsorption.

[0020] The first channel 11 extends through both ends of the main body 10. The first channel 11 includes an input end 111, a connecting section 112, and an output end 113. The input end 111 and the output end 113 are respectively the two ends of the first channel 11, and are located on both sides of the connecting section 112. The input end 111 is used to input the first fluid 230 from the input pipe 210 to the suction knife 100; the first fluid 230 is input from the input end 111 into the suction knife 100, passes through the connecting section 112, and flows to the output end 113; the output end 113 is used to output the first fluid 230 and the second fluid 240 from the suction knife 100 to the output pipe 220.

[0021] The connecting section 112 includes a first region 1121, an intermediate region 1122, and a second region 1123. The intermediate region 1122 connects the first region 1121 and the second region 1123. The first region 1121 is located on the side of the intermediate region 1122 closer to the input terminal 111, and the second region 1123 is located on the side of the intermediate region 1122 closer to the output terminal 113. The cross-sectional dimension of the intermediate region 1122 is smaller than that of the first region 1121, and the cross-sectional dimension of the intermediate region 1122 is smaller than that of the second region 1123. That is, the cross-sectional dimension of the intermediate region 1122 is the smallest relative to the first region 1121 and the second region 1123. According to the Venturi effect, when the first fluid 230 flows from the first channel 11, the flow rate of the first fluid 230 is slower in the first region 1121, faster in the intermediate region 1122, and slower in the second region 1123. When the first fluid 230 moves from the first region 1121 to the intermediate region 1122, the pressure at the connection between the first region 1121 and the intermediate region 1122 is low, forming a negative pressure. A negative pressure is formed in the second channel 22, which is connected to the first channel 11, thereby enabling the second channel 22 to adsorb the second fluid 240.

[0022] The adsorption section 20 is connected to the main body section 10, and the adsorption section 20 and the main body section 10 generally form a "T" shape. The second channel 22 and the connecting section 112 of the first channel 11 are connected. The adsorption end 21 includes a first adsorption port 211, which is used to contact the second fluid 240. When there is a negative pressure in the second channel 22, the first adsorption port 211 can draw the second fluid 240 into the second channel 22.

[0023] The adsorption end 21 further includes at least one second adsorption port 212, which is used to assist in adsorbing the second fluid 240. When the suction knife 100 adsorbs the second fluid 240 located on the circuit board preform 201, both the first adsorption port 211 and the second adsorption port 212 can adsorb the second fluid 240.

[0024] The second adsorption port 212 and the second adsorption port 212 are not on the same plane, and the distance from the second adsorption port 212 to the main body 10 is less than the distance from the first adsorption port 211 to the main body 10. That is, the first adsorption port 211 is closer to the circuit board preform 201, and the first adsorption port 211 preferentially adsorbs the second fluid 240; when the adsorption force is large, causing the circuit board preform 201 to block the first adsorption port 211, the second fluid 240 can continue to be adsorbed through the second adsorption port 212.

[0025] In this embodiment, the adsorption end 21 includes a plurality of second adsorption ports 212, which surround the first adsorption port 211. Providing a plurality of second adsorption ports 212 increases the efficiency of the suction knife 100 in adsorbing the second fluid 240, and also allows the second fluid 240 to be adsorbed from multiple directions.

[0026] The solenoid valve 30 is connected to the adsorption section 20. The solenoid valve 30 is used to open or close the second channel 22 according to whether the second fluid 240 is present at the adsorption end 21. When the second fluid 240 is present at the adsorption end 21, the solenoid valve 30 opens the second channel 22 so that the adsorption section 20 can adsorb the second fluid 240; when the second fluid 240 is not present at the adsorption end 21, the solenoid valve 30 closes the second channel 22. When the solenoid valve 30 closes the second channel 22, it is equivalent to the second channel 22 being in a closed state, and the suction knife 100 will not affect the negative pressure state of other suction knives 100, thereby reducing the impact on the adsorption effect of other suction knives 100.

[0027] The solenoid valve 30 may include a driving member 31, an elastic member 32, and a movable member 33. The elastic member 32 elastically connects the driving member 31 and the movable member 33. The driving member 31 is used to attract the movable member 33 to open the second channel 22 when the driving member 31 is energized. When the driving member 31 is not energized, the movable member 33 abuts against the side wall of the second channel 22 to close the second channel 22.

[0028] Specifically, the driving element 31 can be an electromagnetic coil; the movable element 33 is generally shaped to match the cross-section of the second channel 22, such as a disc. The movable element 33 contains a material that can be attracted by magnetic force, such as iron or nickel. When the driving element 31 is energized, the driving element 31 generates a magnetic force that can attract the movable element 33. When the driving element 31 is not energized, the driving element 31 can release the movable element 33. The movable element 33 abuts against the side wall of the second channel 22 under the elastic action of the elastic element 32.

[0029] A slot 23 is provided on the side wall of the second channel 22, and the movable member 33 can be held in the slot 23. When the movable member 33 abuts against the side wall of the second channel 22, the sealing performance of the second channel 22 is improved.

[0030] When the solenoid valve 30 opens the second channel 22, the driving member 31 generates a magnetic force and attracts the movable member 33. The movable member 33 moves toward the side where the elastic member 32 is located and compresses the elastic member 32 to open the second channel 22. When the solenoid valve 30 closes the second channel 22, the driving member 31 is de-energized, the magnetic force disappears, the attraction of the driving member 31 to the movable member 33 disappears, the elastic member 32 restores its deformation, and drives the movable member 33 to move toward the side away from the elastic member 32. The movable member 33 is engaged in the slot 23 to close the second channel 22.

[0031] The suction knife 100 also includes a sensor 40, which establishes a communication connection with the solenoid valve 30. The sensor 40 is located at the suction end 21 and surrounds the second suction port 212. The sensor 40 detects the presence of the second fluid 240 at the suction end 21 based on the principle of resistance comparison. When the sensor 40 detects the presence of the second fluid 240 at the suction end 21, it triggers the solenoid valve 30 to open the second channel 22; when the sensor 40 detects the absence of the second fluid 240 at the suction end 21, it triggers the solenoid valve 30 to close the second channel 22.

[0032] The suction knife 100 may further include a processor (not shown), which may be a PLC, microcontroller, etc. The processor is connected to the sensor 40 and the solenoid valve 30 via electrical signals. When the sensor 40 detects the presence of the second fluid 240 at the suction end 21, it converts this signal into an electrical signal and sends it to the processor. After receiving the signal, the processor performs internal logic judgment and processing, and sends a command to the solenoid valve 30 to open the second channel 22, causing the solenoid valve 30 to actuate and open the second channel 22, allowing the second fluid 240 to pass through. When the sensor 40 detects the absence of the second fluid 240 at the suction end 21, it similarly sends a signal to the processor, which then sends a command to the solenoid valve 30 to close the second channel 22, causing the solenoid valve 30 to close and preventing the second fluid 240 from passing through.

[0033] The suction knife 100 further includes at least one check valve 50, which is located in the second channel 22 between the solenoid valve 30 and the main body 10. The check valve 50 is fixedly connected to the side wall of the second channel 22, and is inclined relative to the side wall of the second channel 22. The check valve 50 includes a first end 51 and a second end 52. The first end 51 is fixedly connected to the side wall of the second channel 22, and there is a gap between the second end 52 and the side wall of the second channel 22. The second end 52 is closer to the first channel 11 than the first end 51.

[0034] When the second fluid 240 enters the second channel 22 from the adsorption end 21, it can flow upward around the check valve 50 (i.e., forward flow) and gain an acceleration effect due to the flow pressure. However, when the second fluid 240 flows downward (i.e., reverse flow), it is obstructed by each check valve 50 it passes through, causing a blockage effect and increasing the pressure head, further hindering the overall downward flow of the second fluid 240. Furthermore, the more check valves 50 there are, the greater the resistance to the downward flow of the second fluid 240, giving the adsorption section 20 a unidirectional conduction effect, thereby achieving the function of preventing backflow.

[0035] The suction knife 100 provided in this embodiment includes a main body 10, an adsorption part 20, and a solenoid valve 30. The main body 10 includes a first channel 11, the cross-sectional dimensions of which differ in different regions. The adsorption part 20 includes a second channel 22 communicating with the first channel 11. When a first fluid 230 is input into the first channel 11, the flow rate of the first fluid 230 varies in different regions. The region with the lower flow rate has lower pressure, resulting in a negative pressure in the second channel 22 to adsorb the second fluid 240 located at the adsorption end 21 of the adsorption part 20. The solenoid valve 30 can open or close the second channel 22 according to whether the second fluid 240 is present at the adsorption end 21. This prevents the second fluid 240 adsorbed in the second channel 22 from flowing out of the adsorption end 21 and keeps the second channel 22 in a sealed state, thereby reducing the impact on the adsorption effect of other suction knives 100.

[0036] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the scope of the technical solutions of this application.

Claims

1. A suction knife, characterized in that, include: The main body includes a first channel, and the cross-sectional dimensions of the first channel located in different regions are different; An adsorption section is connected to the main body section, and the adsorption section includes a second channel that communicates with the first channel. as well as The solenoid valve is connected to the adsorption unit; The first channel is used for the flow of a first fluid to create a negative pressure in the second channel. The end of the adsorption part away from the main body is the adsorption end, which is used to adsorb a second fluid into the second channel and merge with the first fluid. The solenoid valve is used to open or close the second channel according to whether the second fluid is present at the adsorption end.

2. The suction knife according to claim 1, characterized in that, The first channel includes an input end, a connecting section, and an output end, with the input end and the output end located on opposite sides of the connecting section, respectively; the second channel is connected to the connecting end; the input end is used to input the first fluid, and the output end is used to output the first fluid and the second fluid.

3. The suction knife according to claim 2, characterized in that, The connecting section includes a first area, a middle area, and a second area. The middle area connects the first area and the second area. The first area is located on the side of the middle area closer to the input end, and the second area is located on the side of the middle area closer to the output end. The cross-sectional dimension of the middle area is smaller than that of the first area, and the cross-sectional dimension of the middle area is smaller than that of the second area.

4. The suction knife according to any one of claims 1-3, characterized in that, The end of the second channel away from the first channel includes a first adsorption port and at least one second adsorption port, and the distance from the second adsorption port to the main body is less than the distance from the first adsorption port to the main body.

5. The suction knife according to any one of claims 1-3, characterized in that, The suction knife also includes a sensor, which establishes a communication connection with the solenoid valve. The sensor is located at the suction end and is used to detect whether the second fluid is present at the suction end. When the sensor detects the presence of the second fluid at the suction end, it triggers the solenoid valve to open the second channel. When the sensor detects the absence of the second fluid at the suction end, it triggers the solenoid valve to close the second channel.

6. The suction knife according to claim 5, characterized in that, The solenoid valve includes a driving element, an elastic element, and a movable element. The elastic element elastically connects the driving element and the movable element. When the driving element is energized, it attracts the movable element to open the second channel. When the driving element is de-energized, the movable element abuts against the side wall of the second channel to close the second channel.

7. The suction knife according to claim 6, characterized in that, The second channel has a slot on its side wall, and the movable part can be held in the slot.

8. The suction knife according to claim 5, characterized in that, The suction knife also includes a processor, which is connected to the sensor and the solenoid valve via electrical signals.

9. The suction knife according to any one of claims 1-3, characterized in that, The suction knife also includes a backstop, which is located in the second channel. The backstop includes a first end and a second end. The first end is fixedly connected to the side wall of the second channel, and there is a gap between the second end and the side wall of the second channel. The second end is closer to the first channel than the first end.

10. A liquid absorption assembly, characterized in that, include: Input pipe; Output pipe; as well as At least one suction knife according to any one of claims 1-9, wherein the suction knife is connected to the input pipe and the output pipe; The input pipe is used to input the first fluid into the suction knife, and the output pipe is used to discharge the first fluid and the second fluid that have passed through the suction knife.

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