Electromagnetic spraying device

Abstract

The invention relates to an electromagnetic injection device which comprises a support, a charging barrel and an electromagnetic injection valve, the electromagnetic injection valve comprises a valve body, a valve rod and a driving assembly, the driving assembly comprises a first magnet and a second magnet, the first magnet and the valve body are relatively fixed, the second magnet and the valve rod are relatively fixed, and at least one of the first magnet and the second magnet is an electromagnet. When the direction of current introduced into the electromagnet is clockwise, a first magnetic acting force is generated between the first magnet and the second magnet and drives the valve rod to be away from the liquid spraying opening, and when the direction of current introduced into the electromagnet is anticlockwise, a second magnetic acting force is generated between the first magnet and the second magnet and drives the valve rod to be close to the liquid spraying opening. The structure of the electromagnetic jetting device is not changed, and the purpose of pushing high-viscosity liquid to be jetted out is achieved only by changing the current direction.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid distribution, and in particular to an electromagnetic spray device. Background Art

[0002] High-precision fluid dispensing technology is needed in the fields of new energy, microelectromechanical systems (MEMS), nanoelectromechanical systems (NEMS), biochemical engineering, and printed circuit board (PCB) manufacturing. High-precision fluid dispensing technology refers to dispensing various microliter or nanoliter fluids to the specified position of the target material to meet the needs of high-precision fluid dispensing. In particular, in the field of printed circuit board manufacturing, high-viscosity liquids are required as the medium for high-precision fluid dispensing.

[0003] The current electromagnetic spray device relies on the reciprocating motion of the valve stem to spray liquid. The solenoid valve is electrically energized, driving the valve stem to lift and allow liquid to enter the valve chamber. When the solenoid valve is powered off, the valve stem is reset under the elastic force of the spring, and the liquid in the valve chamber is sprayed outward from the nozzle under the action of the valve stem. In actual use, due to the limitation of the size of the valve body, the elastic force and stiffness of the spring cannot be increased indefinitely. Liquid spraying relies solely on the elastic force of the spring, and the energy is limited. Especially when spraying high-viscosity liquids, part of the elastic force of the spring needs to overcome the movement resistance of the high-viscosity liquid, resulting in a smaller elastic force used for spraying, resulting in poor high-viscosity liquid spraying effect. Providing an electromagnetic spray device that can be used for high-viscosity liquid spraying is a technical problem that needs to be solved in this field. Summary of the invention

[0004] To this end, the present invention provides an electromagnetic spraying device that can be used for spraying high-viscosity liquids.

[0005] In order to solve the technical problem, the present invention provides an electromagnetic spray device, including a bracket, a barrel and an electromagnetic spray valve, wherein the barrel is connected to the bracket and is used to store liquid to be dispensed, and the electromagnetic spray valve includes:

[0006] a valve body, the valve body being connected to the bracket, the valve body being provided with a valve cavity extending along a first direction, the valve cavity having a liquid inlet and a liquid spraying port, the liquid inlet being used for allowing the liquid to be dispensed to enter the valve cavity, the liquid inlet being communicated with the barrel, and the liquid spraying port being used for allowing the liquid to be dispensed in the valve cavity to spray out;

[0007] A valve stem, the valve stem extending along the first direction and comprising a valve stem head and a valve stem tail respectively close to two ends of the valve stem in the length direction, the valve stem head being located in the valve cavity, and the valve stem head being able to approach and move away from the liquid spray port along the first direction;

[0008] A driving component, wherein the driving component includes a first magnet and a second magnet, wherein the first magnet is fixed relative to the valve body, and the second magnet is fixed relative to the valve stem, and at least one of the first magnet and the second magnet is an electromagnet, and when the direction of the current passed through the electromagnet is clockwise, a first magnetic force is generated between the first magnet and the second magnet and drives the valve stem away from the liquid spraying port, and when the direction of the current passed through the electromagnet is counterclockwise, a second magnetic force is generated between the first magnet and the second magnet and drives the valve stem close to the liquid spraying port.

[0009] Furthermore, the first magnet and the second magnet are both arranged outside the valve cavity.

[0010] Furthermore, both the first magnet and the second magnet are electromagnets.

[0011] Furthermore, the second magnet is connected to the tail of the valve stem, the first magnet, the second magnet and the valve stem are arranged in sequence along the first direction, the first magnetic force is an attractive force, and the second magnetic force is a repulsive force.

[0012] Furthermore, the driving assembly further comprises an elastic component, the elastic restoring force of the elastic component acts on the valve stem and drives the valve stem to approach the liquid spraying port.

[0013] Furthermore, the elastic component is a spring, the spring is sleeved on the valve stem and the spring is located in the valve cavity.

[0014] Furthermore, a sealing component is provided between the valve stem and the valve cavity to seal the gap therebetween, the sealing component divides the valve cavity into a first cavity portion and a second cavity portion, the liquid inlet and the liquid spray port are connected to the first cavity portion, and the spring is located in the second cavity portion.

[0015] Furthermore, the first magnet is connected to the valve body via an adjusting component, and the adjusting component adjusts the position of the first magnet along the first direction.

[0016] Furthermore, the liquid spray port is arranged at one end of the valve cavity in the first direction, the liquid inlet is arranged at one end of the valve cavity in the second direction, the liquid inlet is close to the liquid spray port, and the first direction and the second direction are perpendicular to each other.

[0017] Furthermore, the valve stem head is in the shape of a bullet head, the liquid spraying port is a conical hole, the tip of the valve stem head faces the liquid spraying port, and the orifice of the liquid spraying port at one end close to the valve stem head is larger than the orifice of the liquid spraying port at one end away from the valve stem head.

[0018] The technical solution of the present invention has the following advantages over the prior art:

[0019] (1) The electromagnetic spray device described in the present invention changes the direction of the current of the electromagnet, thereby changing the direction of the magnetic poles of the first magnet or the second magnet, so that the first magnet and the second magnet can attract each other or repel each other, thereby driving the valve stem head to approach and move away from the liquid spray port through the magnetic force between the first magnet and the second magnet. When the valve stem head approaches the liquid spray port, the liquid to be dispensed is pushed out of the valve cavity, and when the valve stem head moves away from the liquid spray port, the liquid to be dispensed enters the valve cavity. The present invention does not change the structure of the electromagnetic spray device, but only achieves the purpose of pushing the high-viscosity liquid to be sprayed by changing the direction of the current;

[0020] (2) In the electromagnetic injection device of the present invention, the first magnet and the second magnet are both installed outside the valve cavity, which facilitates installation, maintenance and adjustment of the first magnet and the second magnet, and the sizes of the first magnet and the second magnet are not limited by the valve cavity;

[0021] (3) In the electromagnetic spray device of the present invention, the first magnet and the second magnet are both electromagnets, and the magnetic force and magnetic field direction of the first magnet and / or the second magnet can be adjusted as needed;

[0022] (4) In the electromagnetic injection device of the present invention, the first magnet, the second magnet and the valve stem are arranged in sequence along the first and second axes, so the layout is more reasonable and the installation is easier;

[0023] (5) The electromagnetic spray device of the present invention is provided with an elastic component, and the elastic force and the magnetic force jointly drive the valve stem head to approach the liquid spraying port, and jointly push the high-viscosity liquid to spray out, further ensuring that the high-viscosity liquid can be sprayed out;

[0024] (6) In the electromagnetic spray device of the present invention, the elastic component is set as a spring, and the spring is set in the valve cavity. The spring has a large elastic force and a small volume, making the electromagnetic spray device more compact;

[0025] (7) The electromagnetic spray device of the present invention separates the valve chamber by providing a sealing component, so that the liquid to be dispensed is not easily leaked out;

[0026] (8) The electromagnetic injection device of the present invention is provided with an adjustment component to adjust the position of the first magnet, thereby adjusting the stroke of the valve stem as needed;

[0027] (9) In the electromagnetic spray device of the present invention, the liquid spray port is arranged at one end of the valve chamber in the first direction, and the liquid inlet is arranged at one end of the valve chamber in the second direction, so that the liquid to be dispensed can more easily enter the valve chamber and spray out of the valve chamber when the valve stem moves;

[0028] (10) In the electromagnetic spray device described in the present invention, the valve stem head is in the shape of a bullet head, and the liquid spraying port is a conical hole. The valve stem head can more easily push high-viscosity liquid into the conical hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0030] Figure 1 is a schematic diagram of the electromagnetic injection device in the present invention;

[0031] Figure 2 It is a schematic diagram of the electromagnetic injection device of the present invention when liquid is introduced;

[0032] Figure 3 It is a schematic diagram of the electromagnetic spray device of the present invention when spraying liquid.

[0033] Description of the accompanying drawings:

[0034] 1. Bracket; 2. Barrel; 3. Valve body; 31. Valve cavity; 32. Liquid inlet; 33. Liquid spray outlet; 4. Valve stem; 5. First magnet; 6. Second magnet; 7. Elastic component; 8. Sealing component; 9. Adjusting component. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0036] See also Figures 1 to 3 As shown, an embodiment of the electromagnetic injection device provided by the present invention.

[0037] The electromagnetic spray device comprises a bracket 1, a barrel 2 and an electromagnetic spray valve. The barrel 2 is connected to the bracket 1 and is used to store the liquid to be dispensed. The electromagnetic spray valve comprises:

[0038] A valve body 3, the valve body 3 is connected to the bracket 1, the valve body is provided with a valve cavity 31 extending along a first direction, the valve cavity 31 has a liquid inlet 32 ​​and a liquid spraying port 33, the liquid inlet 32 ​​is used for the liquid to be dispensed to enter the valve cavity 31, the liquid inlet 32 ​​is communicated with the barrel 2, and the liquid spraying port 33 is used for the liquid to be dispensed in the valve cavity 31 to be sprayed out;

[0039] A valve stem 4, the valve stem 4 extends along the first direction and comprises a valve stem head and a valve stem tail respectively close to two ends of the valve stem in the length direction, the valve stem head is located in the valve cavity 31, and the valve stem head can approach and move away from the liquid injection port 33 along the first direction;

[0040] A driving component, a first magnet 5 and a second magnet 6, wherein the first magnet 5 is relatively fixed to the valve body 3, and the second magnet 6 is relatively fixed to the valve stem 4. At least one of the first magnet 5 and the second magnet 6 is an electromagnet. When the direction of the current passed through the electromagnet is clockwise, a first magnetic force is generated between the first magnet 5 and the second magnet 6 and the valve stem 4 is driven away from the liquid injection port 33. When the direction of the current passed through the electromagnet is counterclockwise, a second magnetic force is generated between the first magnet 5 and the second magnet 6 and the valve stem 4 is driven close to the liquid injection port 33.

[0041] When the valve stem head is away from the liquid spray port 33, that is, the valve stem head moves in a direction away from the liquid spray port 33, the liquid to be distributed in the barrel 2 is sucked into the valve cavity 31 from the liquid inlet 32. When the valve stem head is close to the liquid spray port 33, that is, the valve stem head moves in a direction close to the liquid spray port 33, the liquid to be distributed in the valve cavity 31 is sprayed out from the liquid spray port 33.

[0042] The electromagnet mentioned above is a device that generates electromagnetism when electricity is applied. A conductive winding that matches its power is wound around the outside of the iron core. This coil with current applied has magnetism like a magnet, and it is also called an electromagnet. The electromagnet is magnetic when electricity is applied, and the magnetism disappears when the power is removed. The magnetism of the electromagnet can be controlled by turning on and off the current; the magnitude of the magnetism can be controlled by the strength of the current or the number of turns of the coil; the magnitude of the magnetism can also be controlled by changing the resistance to control the current; its magnetic pole can be controlled by changing the direction of the current, and so on. That is: the strength of the magnetism can be changed, the presence of the magnetism can be controlled, the direction of the magnetic pole can be changed, and the magnetism can disappear due to the disappearance of the current.

[0043] Among the first magnetic force and the second magnetic force, one is an attractive force and the other is a repulsive force. For example, when the first magnetic force is an attractive force and drives the valve stem head away from the liquid spraying port 33, the second magnetic attraction force is a repulsive force and drives the valve stem head close to the liquid spraying port 33; or when the first magnetic force is a repulsive force and drives the valve stem head away from the liquid spraying port 33, the second magnetic attraction force is an attractive force and drives the valve stem head close to the liquid spraying port 33. It is specifically determined according to the relative position relationship between the first magnet 5 and the second magnet 6.

[0044] By changing the current direction of the electromagnet, the magnetic pole direction of the first magnet 5 or the second magnet 6 is changed, so that the first magnet 5 and the second magnet 6 attract or repel each other, thereby driving the valve stem head to approach and move away from the liquid spraying port 33 through the magnetic force between the first magnet 5 and the second magnet 6, and the magnetic force of the electromagnet drives the valve stem head to push the high-viscosity liquid to spray out. The present invention does not change the structure of the electromagnetic spray device, and only achieves the purpose of pushing the high-viscosity liquid to spray out by changing the current direction.

[0045] In a preferred implementation manner of this embodiment, the first magnet 5 and the second magnet 6 are both arranged outside the valve chamber 31 .

[0046] The space inside the valve cavity 31 is small, so it is difficult to accommodate and install the first magnet 5 and the second magnet 6. If there is a problem after installation, it is difficult to disassemble. In addition, it is difficult for the coil to dissipate heat in the valve cavity and it is easy to be damaged. Therefore, the first magnet 5 and the second magnet 6 are installed outside the valve cavity 31 to facilitate installation, maintenance and adjustment, and the size of the first magnet 5 and the second magnet 6 is not limited by the valve cavity.

[0047] In the preferred implementation manner of this embodiment, the first magnet 5 and the second magnet 6 are both electromagnets.

[0048] The first magnet 5 and the second magnet 6 are both electromagnets, and the strength of the magnetic force and the direction of the magnetic field can be adjusted as needed.

[0049] In the preferred implementation manner of this embodiment, the second magnet 6 is connected to the tail of the valve stem, the first magnet 5, the second magnet 6 and the valve stem 4 are arranged in sequence along the first direction, the first magnetic force is an attractive force, and the second magnetic force is a repulsive force.

[0050] The first magnet 5, the second magnet 6 and the valve stem 4 are arranged in sequence along the first direction, that is, the first magnet 5 is arranged on the side of the second magnet 6 away from the valve stem 4. At this time, when the direction of the current passed through the electromagnet is clockwise, the first magnet 5 and the second magnet 6 have the same poles facing each other and repel each other, driving the valve stem head to approach the liquid injection port 33. When the direction of the current passed through the electromagnet is counterclockwise, the first magnet 5 and the second magnet 6 have different poles facing each other and attract each other, driving the valve stem head away from the liquid injection port 33. The layout of the first magnet 5, the second magnet 6 and the valve stem 4 is more reasonable and easier to install.

[0051] The preferred implementation manner in this embodiment further comprises an elastic component 7 , the elastic restoring force of the elastic component 7 acts on the valve stem 4 and drives the valve stem 4 to approach the liquid injection port 33 .

[0052] When the direction of the current passed through the electromagnet is counterclockwise, a second magnetic force is generated between the first magnet 5 and the second magnet 6, driving the valve stem head away from the liquid spraying port 33, and the valve stem 4 drives the elastic component 7 to deform. When the direction of the current passed through the electromagnet is clockwise, a first magnetic force is generated between the first magnet 5 and the second magnet 6, driving the valve stem head close to the liquid spraying port 33, and at the same time, the restoring elastic force of the elastic component 7 to restore its shape also drives the valve stem head close to the liquid spraying port 33. By providing the elastic component 7, the elastic force and the magnetic force jointly drive the valve stem head to push the high-viscosity liquid to spray out, further ensuring that the high-viscosity liquid can be sprayed out.

[0053] In a preferred implementation manner of the present embodiment, the elastic component 7 is a spring, and the spring is sleeved on the valve stem 4 and located in the valve cavity 31 .

[0054] The elastic component 7 is configured as a spring, and the spring is disposed in the valve cavity 31. The spring has a larger elastic force and a smaller volume, so that the electromagnetic injection device is more compact.

[0055] In the preferred implementation manner of the present embodiment, a sealing component 8 for sealing the gap between the valve stem 4 and the valve cavity 31 is provided, the sealing component 8 separates the valve cavity 31 into a first cavity portion and a second cavity portion, the liquid inlet 32 ​​and the liquid injection port 33 are connected to the first cavity portion, and the spring is located in the second cavity portion.

[0056] The valve cavity 31 is separated by providing a sealing component 8, so that the liquid to be dispensed is not easily leaked out. Specifically, the sealing component 8 is a sealing ring.

[0057] In a preferred implementation manner of the present embodiment, the first magnet 5 is connected to the valve body 3 via an adjusting component 9, and the adjusting component 9 adjusts the position of the first magnet 5 along the first direction.

[0058] The greater the distance between the first magnet 5 and the second magnet 6, the longer the movement stroke of the second magnet 6 and the valve stem 4, and the smaller the distance between the first magnet 5 and the second magnet 6, the shorter the movement stroke of the second magnet 6 and the valve stem 4. In order to be applicable to different movement strokes of the valve stem 4, the first magnet 5 is set to be position adjustable. The electromagnetic injection device adjusts the position of the first magnet 5 before use, and during use, the relative position of the first magnet 5 and the valve body 3 remains unchanged. The above-mentioned adjustment component 9 can be, for example, a screw.

[0059] In the preferred implementation manner of the present embodiment, the above-mentioned liquid spray port 33 is arranged at one end of the above-mentioned valve cavity 31 in the first direction, the above-mentioned liquid inlet 32 ​​is arranged at one end of the above-mentioned valve cavity 31 in the second direction, the above-mentioned liquid inlet 32 ​​is close to the above-mentioned liquid spray port 33, and the above-mentioned first direction is perpendicular to the above-mentioned second direction.

[0060] The liquid inlet 32 ​​is arranged on the side of the movement trajectory of the valve stem 4, and the liquid spray port 33 is arranged in front of the movement trajectory of the valve stem 4. Therefore, when the valve stem 4 moves in the direction of extending into the valve cavity 31, the liquid to be distributed is more likely to be sprayed out from the liquid spray port 33 instead of flowing back to the liquid inlet 32. When the valve stem 4 moves, high-viscosity liquid is more likely to enter the valve cavity 31 and spray out of the valve cavity 31.

[0061] In the preferred implementation manner of the present embodiment, the valve stem head is in the shape of a bullet head, the liquid spraying port 33 is a conical hole, the tip of the valve stem head is directly opposite to the liquid spraying port 33, and the opening of the liquid spraying port 33 at one end close to the valve stem head is larger than the opening of the liquid spraying port 33 at one end away from the valve stem head.

[0062] When the liquid to be dispensed contacts the bullet head, it encounters less resistance from the liquid to be dispensed, and it is easier to push the high-viscosity liquid to the liquid spray port 33. The liquid spray port 33 is a conical hole with a larger entrance, and the high-viscosity liquid can more easily enter the conical hole. The conical hole guides the high-viscosity liquid to be sprayed out from the smaller orifice of the liquid spray port.

[0063] Obviously, the embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention.

Claims

1. An electromagnetic spray device, comprising a bracket, a barrel and an electromagnetic spray valve, wherein the barrel is connected to the bracket and is used to store liquid to be dispensed, characterized in that: The electromagnetic injection valve comprises: a valve body, the valve body being connected to the bracket, the valve body being provided with a valve cavity extending along a first direction, the valve cavity having a liquid inlet and a liquid spraying port, the liquid inlet being used for allowing the liquid to be dispensed to enter the valve cavity, the liquid inlet being communicated with the barrel, and the liquid spraying port being used for allowing the liquid to be dispensed in the valve cavity to spray out; A valve stem, the valve stem extending along the first direction and comprising a valve stem head and a valve stem tail respectively close to two ends of the valve stem in the length direction, the valve stem head being located in the valve cavity, and the valve stem head being able to approach and move away from the liquid spray port along the first direction; A driving component, wherein the driving component includes a first magnet and a second magnet, wherein the first magnet is fixed relative to the valve body, and the second magnet is fixed relative to the valve stem, and at least one of the first magnet and the second magnet is an electromagnet, and when the direction of the current passed through the electromagnet is clockwise, a first magnetic force is generated between the first magnet and the second magnet and drives the valve stem away from the liquid spraying port, and when the direction of the current passed through the electromagnet is counterclockwise, a second magnetic force is generated between the first magnet and the second magnet and drives the valve stem close to the liquid spraying port.

2. The electromagnetic injection device according to claim 1, characterized in that: The first magnet and the second magnet are both arranged outside the valve cavity.

3. The electromagnetic injection device according to claim 1, characterized in that: The first magnet and the second magnet are both electromagnets.

4. The electromagnetic injection device according to claim 1, characterized in that: The second magnet is connected to the tail of the valve stem, the first magnet, the second magnet and the valve stem are arranged in sequence along the first direction, the first magnetic force is an attractive force, and the second magnetic force is a repulsive force.

5. The electromagnetic injection device according to claim 1, characterized in that: The driving assembly further comprises an elastic component, the elastic restoring force of which acts on the valve stem and drives the valve stem to approach the liquid spraying port.

6. The electromagnetic injection device according to claim 5, characterized in that: The elastic component is a spring, the spring is sleeved on the valve stem and the spring is located in the valve cavity.

7. The electromagnetic injection device according to claim 6, characterized in that: A sealing component is provided between the valve stem and the valve cavity to seal the gap therebetween. The sealing component divides the valve cavity into a first cavity portion and a second cavity portion. The liquid inlet and the liquid spray port are connected to the first cavity portion, and the spring is located in the second cavity portion.

8. The electromagnetic injection device according to claim 1, characterized in that: The first magnet is connected to the valve body through an adjusting component, and the adjusting component adjusts the position of the first magnet along the first direction.

9. The electromagnetic injection device according to claim 1, characterized in that: The liquid spray port is arranged at one end of the valve cavity in the first direction, the liquid inlet is arranged at one end of the valve cavity in the second direction, the liquid inlet is close to the liquid spray port, and the first direction and the second direction are perpendicular to each other.

10. The electromagnetic injection device according to claim 1, characterized in that: The valve stem head is in the shape of a bullet head, the liquid spraying port is a conical hole, the tip of the valve stem head faces the liquid spraying port, and the orifice of the liquid spraying port at one end close to the valve stem head is larger than the orifice of the liquid spraying port at one end away from the valve stem head.

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