A piezoelectric injection valve and spray device

Abstract

The embodiment of the application belongs to the technical field of spraying equipment, and relates to a piezoelectric injection valve, which comprises a main body, a flow channel assembly and a bearing assembly. The flow channel assembly is inserted into the main body, the side wall of the flow channel assembly is provided with a first moving groove and a second moving groove, the first moving groove is distributed along the axial direction of the flow channel assembly, the second moving groove is arranged around the side wall of the flow channel assembly and is vertically connected to the first moving groove, and the bearing assembly is connected to the main body and bears against the inner wall of the second moving groove. The embodiment of the application also relates to a spraying equipment. The embodiment of the application can align the first moving groove with the bearing part, move the bearing part axially relative to the first moving groove to the second moving groove, rotate the flow channel assembly, and then rotate the bearing part radially relative to the second moving groove. Thus, the axial movement of the flow channel assembly is avoided by the limitation of the second moving groove, the flow channel assembly and the main body are connected, and the disassembly and assembly efficiency of the spraying equipment and the piezoelectric injection valve can be improved.

Description

Technical Field

[0001] This application relates to the field of spraying equipment technology, and more specifically, to a piezoelectric jet valve and spraying equipment. Background Technology

[0002] In industries such as electronics and automotive, spraying equipment uses piezoelectric jet valves to precisely control the amount of adhesive dispensed. With the rapid development of the electronics industry, the requirements for electronic packaging are becoming increasingly stringent. For high-requirement electronic packaging technologies, non-contact piezoelectric jet valves are being used more and more widely in the field of electronic packaging due to their advantages such as high efficiency and high precision.

[0003] The main structure of a piezoelectric injection valve consists of a main body, a flow channel assembly, and nozzles and a striker for adhesive spraying. Its main principle is as follows: when the main valve body is energized, the deformation of the piezoelectric actuator is amplified through an internal amplification structure and transmitted to the striker. The striker and nozzle contact within the flow channel assembly, forming a cavity. The high-speed reciprocating motion of the striker impacts the nozzle, spraying the adhesive out of the cavity, thus completing the dispensing process. Therefore, the flow channel assembly requires frequent disassembly, cleaning, or maintenance. The disassembly efficiency of the flow channel assembly directly affects the production efficiency of the product. Currently, the connection between the flow channel assembly and the main body often uses threaded connections, resulting in low disassembly and assembly efficiency. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of this application is the low efficiency of disassembly and assembly of the flow channel components of existing piezoelectric injection valves.

[0005] To address the aforementioned technical problems, this application provides a piezoelectric injection valve capable of quickly disassembling and assembling flow channel components, employing the following technical solution:

[0006] A piezoelectric injection valve includes a body, a flow channel assembly, and a holding assembly;

[0007] The flow channel assembly is detachably inserted into the main body, and a first moving groove and a second moving groove are provided on the outer side wall. The first moving groove is distributed along the axial direction of the flow channel assembly.

[0008] The second movable groove surrounds the sidewall of the flow channel assembly and is vertically connected to the first movable groove;

[0009] The abutting component is connected to the main body and abuts against the inner wall of the second moving groove. The abutting component cooperates with the first moving groove and the second moving groove to restrict the movement of the flow channel component.

[0010] Furthermore, the main body includes a plug-in channel, and a first protrusion is provided on the inner sidewall of the plug-in channel in the circumferential direction. The first protrusion and the top wall of the plug-in channel together define a plug-in groove, and the first protrusion is provided with a plug-in interface.

[0011] The flow channel assembly includes a plug portion, and a second protrusion is provided at intervals on the outer periphery of the plug portion. The plug portion is located in the plug channel, and the second protrusion passes through the plug interface and abuts against the first protrusion in the plug groove.

[0012] Furthermore, the abutment assembly includes an abutment member, a pusher member, and a fixing member. The abutment member abuts against the inner wall of the second moving groove. The pusher member is connected to the abutment member and is used to push the abutment member to move toward the flow channel assembly. The fixing member is detachably connected to the abutment member and is used to fix the abutment member.

[0013] Furthermore, the pushing member includes an elastic member and a slider, the slider being connected to the supporting member, and the elastic member transmitting a pushing force to the supporting member through the slider, causing the supporting member to abut against the second moving groove.

[0014] Furthermore, the supporting member is a rotatable sphere, the first moving groove and the second moving groove are arc-shaped grooves, and the shape and size of the first moving groove and the second moving groove are adapted to the supporting member.

[0015] Furthermore, the second moving groove includes a moving channel and a positioning recess disposed on the moving channel. The depth of the positioning recess is greater than that of the moving channel, and its shape is adapted to the abutment. The abutment abuts against the inner wall of the positioning recess.

[0016] Furthermore, the positioning recesses are multiple and are equidistantly distributed around the outer periphery of the flow channel assembly.

[0017] Furthermore, the flow channel assembly includes an observation port, a flow channel, a nozzle, a sealing groove, and a sealing assembly;

[0018] The flow channel connects the nozzle and the sealing assembly. The sealing assembly is disposed in the sealing groove to prevent the flow channel and the sealing groove from communicating. The observation hole is located on the outer wall of the flow channel assembly and communicates with the sealing groove.

[0019] Furthermore, the piezoelectric injection valve also includes an adjustment groove, a firing pin channel, a firing pin assembly, and an adjustment knob;

[0020] The flow channel assembly is inserted into one end of the firing pin assembly; the adjustment groove is disposed on the outer wall of the main body and communicates with the firing pin channel; the firing pin assembly is located within the firing pin channel.

[0021] The adjustment knob is disposed in the adjustment groove and threadedly connected to the firing pin assembly, and is used to control the movement of the firing pin assembly in the firing pin channel.

[0022] To address the aforementioned technical problems, this application also provides a spraying device, including the piezoelectric spray valve described in any of the above embodiments.

[0023] Compared with the prior art, the embodiments of this application have the following main advantages:

[0024] The piezoelectric jet valve flow channel assembly of this embodiment is provided with a first moving groove and a second moving groove. The first moving groove is distributed along the axial direction of the flow channel assembly, and the second moving groove surrounds the side wall of the flow channel assembly and is perpendicularly connected to the first moving groove. Therefore, when inserting the flow channel assembly and the body, the operator can first align the first moving groove with the abutment, causing the abutment to move axially relative to the first moving groove to the second moving groove. Then, by rotating the flow channel assembly, the abutment is rotated radially relative to the second moving groove. This avoids axial movement of the flow channel assembly by the restriction of the second moving groove, thus connecting the flow channel assembly and the body. When disassembling the flow channel assembly, simply rotate the flow channel assembly so that the abutment rotates relative to the first moving groove, allowing the flow channel assembly to separate from the body through axial movement. In summary, this structure can improve the efficiency of disassembly and assembly of the flow channel assembly of the spraying equipment and the piezoelectric jet valve. Attached Figure Description

[0025] To more clearly illustrate the solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a side view of the piezoelectric injection valve according to an embodiment of this application;

[0027] Figure 2 yes Figure 1 A cross-sectional view of a medium-pressure electro-injection valve (AA section).

[0028] Figure 3 yes Figure 2 Enlarged view of part B of the medium-pressure electric injection valve;

[0029] Figure 4 This is a schematic diagram of the piezoelectric injection valve assembly according to an embodiment of the present invention;

[0030] Figure 5 This is a cross-sectional view of the main body of the piezoelectric injection valve in an embodiment of this application;

[0031] Figure 6 yes Figure 1 Schematic diagram of the mid-flow channel assembly;

[0032] Figure 7 This is a cross-sectional view of the flow channel assembly according to an embodiment of this application;

[0033] Figure 8 This is a schematic diagram of the structure of the vent pipe and side seal in an embodiment of this application.

[0034] Figure label:

[0035] The piezoelectric injection valve 10, main body 100, first protrusion 111, insertion channel 112, insertion interface 113, insertion groove 114, firing pin assembly 120, first firing pin 121, second firing pin 122, firing pin channel 123, adjustment groove 130, adjustment knob 140, piezoelectric module 150, amplifying lever 160, prying part 170, circuit control assembly 180, and piezoelectric module receiving groove 190;

[0036] Flow channel assembly 200, first moving groove 210, second moving groove 220, moving channel 221, positioning recess 222, second protrusion 230, observation hole 240, flow channel 250, nozzle 260, sealing assembly 270, sealing groove 280;

[0037] Support component 300, support member 310, pusher 320, slider 321, elastic member 322, fixing member 330, vent pipe 400, air connector 410, connector screw 420, nozzle nut 500, side cover 600, fixing hole 610. Detailed Implementation

[0038] 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 herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0039] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] In the embodiment of the piezoelectric injection valve 10 of this application, the Z direction is the up-down direction and the X direction is the left-right direction.

[0041] To solve the above technical problems, refer to Figures 1 to 6 This application provides a piezoelectric injection valve 10, including a main body 100, a flow channel assembly 200, and a supporting assembly 300. The flow channel assembly 200 is detachably inserted into the main body 100, and its outer side wall is provided with a first moving groove 210 and a second moving groove 220. The first moving groove 210 is distributed along the axial direction of the flow channel assembly 200 and cooperates with the supporting assembly 300 to restrict the rotation of the flow channel assembly 200. The second moving groove 220 surrounds the side wall of the flow channel assembly 200 and is vertically connected to the first moving groove 210. It cooperates with the supporting assembly 300 to restrict the movement of the flow channel assembly 200. The supporting assembly 300 is connected to the lower end of the main body 100 and abuts against the inner wall of the second moving groove 220. It cooperates with the second moving groove 220 to restrict the axial movement of the flow channel assembly 200.

[0042] When assembling the piezoelectric injection valve 10, the operator can first align the first movable groove 210 on the flow channel assembly 200 with the supporting assembly 300, and then move the flow channel assembly 200 axially to insert it into the main body 100. During this process, the inner wall of the first movable groove 210 contacts the supporting assembly 300, so the flow channel assembly 200 can only move along the length of the first movable groove 210 and cannot rotate radially. When the flow channel assembly 200 moves axially to the point where the supporting assembly 300 abuts against the junction of the second movable groove 220 and the first movable groove 210, the supporting assembly 300 can be rotated radially relative to the second movable groove 220 by rotating the flow channel assembly 200. When the holding component 300 is located in the second moving groove 220, the inner wall of the second moving groove 220 contacts the holding component 300. Therefore, the flow channel component 200 can only move along the length of the second moving groove 220 and cannot move axially, meaning it will not detach from the main body 100, thus achieving the connection between the flow channel component 200 and the main body 100. When it is necessary to remove the flow channel component 200, simply rotate the flow channel component 200 so that the holding component 300 rotates radially relative to the first moving groove 210, allowing the flow channel component 200 to separate and detach from the main body 100 through axial movement. In summary, the embodiments of this application improve the disassembly and assembly efficiency of the flow channel component 200 of the piezoelectric injection valve 10.

[0043] It is understandable that the connection between the flow channel assembly 200 and the main body 100 can be either that the flow channel assembly 200 is inserted into the main body 100, or that the main body 100 is inserted into the flow channel assembly 200, meaning that the flow channel assembly 200 partially encloses the lower end of the main body 100. The second moving groove 220 and the first moving groove 210 can be blind grooves, thereby preventing the flow channel assembly 200 from rotating or moving beyond a preset position, which could cause it to collide with the main body 100 and be damaged during rotation. The material of the supporting assembly 300 can include a flexible material or the supporting assembly 300 itself has a certain deformation capability, thereby filling the second moving groove 220 through deformation to more tightly fit the inner wall of the second moving groove 220, increasing the friction received by the flow channel assembly 200, and further securing the flow channel assembly 200.

[0044] Further, refer to Figure 5 The main body 100 includes a insertion channel 112. A first protrusion 111 is provided circumferentially on the inner sidewall of the insertion channel 112. The entire first protrusion 111 and the top wall of the insertion channel 112 define an insertion groove 114, and the first protrusion 111 is provided with an insertion interface 113. (Reference) Figure 6 The flow channel assembly 200 includes a plug-in portion (not marked in the figure), and second protrusions 230 are spaced apart on the outer periphery of the plug-in portion. When assembling the flow channel assembly 200 and the main body 100, the first moving groove 210 should first be aligned with the supporting component 300. At this time, the second protrusions 230 and the plug-in interface 113 should also be aligned. Next, the flow channel assembly 200 is axially moved until the supporting component 300 is located at the junction of the second moving groove 220 and the first moving groove 210. At this time, the second protrusions 230 pass through the plug-in interface 113 and are located in the plug-in groove 114. Finally, the flow channel assembly 200 is rotated so that the second protrusions 230 move radially in the second moving groove 220. At this time, the second protrusions 230 are restricted from axial movement by the first protrusion 111 and the top wall of the plug-in channel 112, thereby improving the connection strength between the flow channel assembly 200 and the main body 100 and further preventing the flow channel assembly 200 from slipping out of the main body 100.

[0045] It is understandable that there can be multiple insertion interfaces 113 and multiple protrusions 230, thereby avoiding the time-consuming process of aligning the insertion interfaces 113 and the protrusions 230. Along the axial direction of the insertion channel 112, the first protrusion 111 can have multiple layers. In this case, the first protrusion 111 of the first layer from top to bottom forms an insertion groove 114 between it and the top wall of the insertion channel 112. The first protrusion 111 of the second layer forms an insertion groove 114 between it and the first protrusion 111 of the first layer, and so on. The insertion channel 112 has multiple axially distributed insertion grooves 114. At this time, the second protrusion 230 also has multiple layers, which are inserted into multiple insertion grooves 114 respectively, thereby further preventing the flow channel assembly 200 from slipping out of the main body 100.

[0046] Further, refer to Figure 1 and Figure 3 The abutment assembly 300 includes an abutment member 310, a pusher member 320, and a fixing member 330. The abutment member 310 abuts against the inner wall of the second moving groove 220. The pusher member 320 is connected to the abutment member 310 and is used to push the abutment member 310 toward the flow channel assembly 200. The fixing member 330 is detachably connected to the abutment member 310 and is used to fix the abutment member 310. When the fixing member 330 does not fix the abutment member 310, the abutment member 310 abuts against the inner wall of the second moving groove 220 under the action of the pusher member 320. At this time, although there is friction between the flow channel assembly 200 and the abutment member 310, it can still rotate radially. When the fixing member 330 fixes the abutment member 310, the abutment member 310 will be locked to the inner wall of the second moving groove 220. At this time, the flow channel assembly 200 cannot rotate radially, thereby further fixing the flow channel assembly 200 and preventing the flow channel assembly 200 from rotating radially during use. The fastener 330 can be a fastening knob, which can be rotated to secure the retainer 310.

[0047] Understandably, if a large device such as a motor is used to push the holding member 310 toward the flow channel assembly 200, it will result in a high space occupancy rate of the holding assembly 300, affecting the assembly of the piezoelectric injection valve 10 and other components. Therefore, the pushing member 320 may include an elastic member 322, such as a spring or sheet. When the pushing member 320 includes an elastic member 322 and a slider 321, the elasticity of the elastic member 322 can be used to push the slider 321 against the holding member 310, so that the slider 321 pushes the holding member 310 against the flow channel assembly 200, realizing the assembly of the flow channel assembly 200 and the main body 100. Its structure is simple and has a high space utilization rate.

[0048] At the same time, refer to Figure 5 If both the pusher 320 and the abutment 310 are non-deformable mechanisms, then when designing and assembling the abutment assembly 300, it is necessary to ensure the length of the abutment 310 entering the insertion channel 112. Figure 5 If the depth of the pusher 320 is exactly equal to the depth of the first moving groove 210 and the second moving groove 220, then the abutment 310 will be damaged when it enters the first moving groove 210 and the second moving groove 220, resulting in high manufacturing difficulty and high production cost for the pusher 320 and the abutment 310. When the pusher 320 is an elastic member 322 and a slider 321, the length of the abutment 310 entering the insertion channel 112 can be greater than the depth of the first moving groove 210 and / or the second moving groove 220. In this case, when the abutment 310 enters the first moving groove 210 and the second moving groove 220, it can squeeze the slider 321 to push the elastic member 322 to deform, thereby achieving active avoidance of the abutment 310 and preventing damage to the abutment 310. This reduces the manufacturing cost and manual assembly cost of the abutment assembly 300.

[0049] Further, refer to Figure 3 and 4 The abutment 310 is a rotatable sphere, and the first moving groove 210 and the second moving groove 220 are arc-shaped grooves, both in shape and size adapted to the abutment 310, i.e., the shape is an arc-shaped groove, and the diameter of the arc-shaped groove is the same as the diameter of the abutment 310. Therefore, the abutment 310 moves in the first moving groove 210 and the second moving groove 220 by rolling, which can prevent wear on the abutment 310 when moving in the first moving groove 210 and the second moving groove 220. It is understood that the shape and / or size of the first moving groove 210 and the second moving groove 220 can also be similar to the abutment 310, for example, the first moving groove 210 and the second moving groove 220 can be elliptical grooves, square grooves, etc., and their size is slightly smaller or slightly larger than the abutment 310, as long as the abutment 310 can cooperate with the second moving groove 220 to restrict the axial movement of the flow channel assembly 200 and cooperate with the first moving groove 210 to restrict the radial rotation of the flow channel assembly 200. The material of the supporting member 310 can be metal or alloy, such as steel, iron, 25 steel, etc., thereby ensuring that the supporting member 310 has a certain strength and is not easily damaged.

[0050] Further, refer to Figure 6 and Figure 7 The second moving groove 220 includes a moving channel 221 and a positioning recess 222 disposed on the moving channel 221. The depth of the positioning recess 222 is greater than that of the moving channel 221, and its shape is adapted to the abutment 310. The abutment 310 abuts against the inner wall of the positioning recess 222. When the abutment 310 enters the second moving groove 220 at the junction of the first moving groove 210 and the second moving groove 220, it first passes through the moving channel 221 and then enters the positioning recess 222. Because the depth of the positioning recess 222 is greater than that of the moving channel 221, the abutment 310 is difficult to move from the positioning recess 222 back to the moving channel 221, thereby achieving the effect of simultaneously restricting the axial movement and radial rotation of the flow channel assembly 200.

[0051] Furthermore, in practical work, after assembling the flow channel assembly 200 and the main body 100, it is necessary to adjust the radial rotation angle of the flow channel assembly 200 relative to the main body 100 according to the actual spatial layout, thereby avoiding other mechanisms. This angle is usually 90°. In existing work, the angle adjustment is often done manually by measuring and adjusting the angle, resulting in low assembly efficiency of the piezoelectric injection valve 10. In this embodiment, there are multiple positioning recesses 222, which are equidistantly distributed around the outer periphery of the flow channel assembly 200. At this time, the angle of the flow channel assembly 200 relative to the main body 100 can be quickly adjusted by preset the distance (angle) between the positioning recesses 222. For example, when there are 3 positioning recesses 222 and the angle between the 3 positioning recesses 222 is 90°, each time the operator rotates the flow channel assembly 200 so that the abutment 310 moves from one positioning recess 222 to another positioning recess 222, the angle of the flow channel assembly 200 relative to the main body 100 changes by 90°. This achieves the effect of adjusting the angle of the flow channel assembly 200 without the need for operator measurement, thereby improving the assembly efficiency of the piezoelectric injection valve 10.

[0052] Further, refer to Figure 6 and Figure 7 The flow channel assembly 200 includes an observation hole 240, a flow channel 250, a nozzle 260, a sealing groove 280, and a sealing component 270. The flow channel 250 connects the nozzle 260 and the sealing component 270. The sealing component 270 is located in the sealing groove 280 and serves to prevent the flow channel 250 and the sealing groove 280 from communicating, thus preventing adhesive from seeping into the sealing groove 280 from the flow channel 250. The observation hole 240 is located on the outer wall of the flow channel assembly 200 and connects to the sealing groove 280. During the operation of the piezoelectric injection valve 10, the flow channel 250 is filled with adhesive. At this time, the sealing component 270 can prevent adhesive from flowing back into the main body 100 after entering the sealing groove 280 from the flow channel 250, thus affecting the accuracy of adhesive injection. However, in actual operation, adhesive backflow often occurs due to the sealing component 270 exceeding its working strength or installation errors. Since operators cannot promptly determine whether the sealing component 270 has failed, the accuracy of the injected adhesive cannot meet processing requirements, affecting workpiece production efficiency. This embodiment is provided with an observation hole 240. When the sealing component 270 fails, the adhesive will flow back from the flow channel 250 into the sealing groove 280 and then overflow from the observation hole 240. This allows the staff to promptly detect the failure of the sealing component 270 and replace or repair it, thus improving the efficiency of the piezoelectric injection valve 10.

[0053] Further, refer to Figure 4 and Figure 5The piezoelectric injection valve 10 also includes an adjusting groove 130, a striker channel 123, a striker assembly 120, and an adjusting knob 140. The flow channel assembly 200 is inserted into one end of the striker assembly 120. The adjusting groove 130 is located on the outer wall of the main body 100 and communicates with the striker channel 123. The striker assembly 120 is located within the striker channel 123 and has external threads on its outer wall. The adjusting knob 140 has internal threads, is located in the adjusting groove 130, and is threadedly connected to the striker assembly 120 to control the movement of the striker assembly 120 within the striker channel 123. During the use of the piezoelectric injection valve 10, because the striker assembly 120 needs to repeatedly impact the adhesive, the portion of the striker assembly 120 near the nozzle 260 will wear down, increasing the distance between the striker assembly 120 and the nozzle 260. This makes it impossible to effectively control the adhesive, requiring replacement of the striker assembly 120, resulting in low efficiency of the piezoelectric injection valve 10.

[0054] In this embodiment, the piezoelectric injection valve 10 can control the movement of the impact pin assembly 120 in the impact pin channel 123 by rotating the adjustment knob 140 via a threaded connection, thereby adjusting the distance between the impact pin assembly 120 and the nozzle 260. For example, if it is necessary to control the impact pin assembly 120 to move toward the nozzle 260, the adjustment knob 140 can be rotated so that the adjustment knob 140 abuts against the upper surface of the adjustment groove 130. When the adjustment knob 140 is rotated again, the adjustment knob 140 no longer moves, while the impact pin assembly 120 moves downward toward the nozzle 260 under the action of the thread. This achieves the effect of quickly adjusting the distance between the impact pin assembly 120 and the nozzle 260, improving the efficiency of the piezoelectric injection valve 10. Understandably, the surface of the firing pin knob can be designed with multiple through holes (not marked in the figure) for use with workpieces (such as L-shaped wrenches and screwdrivers) that can be inserted into the through holes, allowing the operator to insert the workpiece into the through holes and rotate the workpiece to turn the adjustment knob 140 without having to control the adjustment knob 140 assembly by hand, thus avoiding hand injuries and further improving work efficiency.

[0055] Further reference Figure 2 , Figure 5 and Figure 7The main body 100 also includes a vent pipe 400, a piezoelectric module 150, a piezoelectric module receiving groove 190, an amplifying lever 160, and a prying part 170. The piezoelectric module 150 is located in the piezoelectric module receiving groove 190 and can move repeatedly. One end of the amplifying lever 160 is connected to the firing pin assembly 120 and the other end abuts against the piezoelectric module 150. The prying part 170 is set in the piezoelectric module receiving groove 190 and abuts against the amplifying lever 160. It is located between the firing pin assembly 120 and the piezoelectric module 150. The vent pipe 400 passes through the outer wall of the main body 100 and connects the piezoelectric module receiving groove 190 with the external environment. When the piezoelectric injection valve 10 is working, the piezoelectric module 150 will move repeatedly to drive the amplifying lever 160. At this time, under the prying action of the prying part 170, the amplifying lever 160 will drive the impacting pin assembly 120 to move up and down along the impacting pin channel 123, so that the adhesive is impacted by the impacting pin assembly 120 and sprayed out from the nozzle 260. The repeated movement of the piezoelectric module 150 and the impacting pin assembly 120 will generate a lot of heat energy, causing the internal temperature of the main body 100 to be too high. The excessively high temperature is prone to causing changes in the actual output displacement, geometric length and stiffness of the piezoelectric module 150, resulting in poor stability of the adhesive. Therefore, this embodiment is provided with a vent pipe 400, through which coolant can be introduced to cool the piezoelectric module 150.

[0056] Understandably, there can be two vent pipes 400, one for inputting cooling gas and the other for outputting cooling gas. The two vent pipes 400 can also be connected to the piezoelectric module receiving slot 190 and the firing pin channel 123 respectively, i.e., one connected to the lower end of the piezoelectric module receiving slot 190 and the other connected to the upper end of the firing pin channel 123. In this case, the cooling gas can flow from below the piezoelectric module receiving slot 190 to the upper end of the firing pin channel 123, and then flow out of the main body 100 from the upper end of the firing pin channel 123, thus ensuring that the cooling gas flows through the entire piezoelectric module 150 and improving the cooling efficiency of the piezoelectric module 150. The vent pipe 400 may include a connector screw 420 and an air connector 410. The main body 100 also includes a side cover 600, which has a fixing hole 610. The air connector 410 is inserted into the fixing hole 610 and, together with the connector screw 420, fixes the side cover 600 to the side wall of the main body 100. When the side cover 600 is connected to the main body 100, the connector screw 420 is located inside the main body 100, and the air connector 410 is located outside the main body 100, thereby achieving the effect of setting the vent pipe 400 on the main body 100. The shape of the fixing hole 610 can be irregular, and the shape of the air connector 410 matches it, thereby achieving rapid positioning of the air connector 410.

[0057] Further reference Figure 2 , Figure 6 and Figure 7The striking pin assembly 120 includes a first striking pin 121 and a second striking pin 122. The first striking pin 121 is located within the striking pin channel 123, and the second striking pin 122 is connected to the flow channel assembly 200. When the flow channel assembly 200 is inserted into the main body 100, the second striking pin 122 abuts against the first striking pin 121. In the prior art, after the flow channel assembly 200 is disassembled, the striking pins inside the main body 100 are exposed to the outside environment, making them susceptible to damage from impacts or corrosion. Furthermore, during the reinstallation of the flow channel assembly 200, impacts on the striking pins are also likely. Therefore, the piezoelectric injection valve 10 of this embodiment adopts a double-striker structure, which can prevent damage from impacts on the striking pins. It is understood that the second striking pin 122 can be connected to the flow channel assembly 200 via a threaded connection.

[0058] Furthermore, the piezoelectric injection valve 10 may also include a displacement sensor (not shown in the figure) and a circuit control component 180. The displacement sensor is located in the firing pin channel 123 or the insertion channel 112 and is electrically connected to the circuit control component 180. The circuit control component 180 is electrically connected to the piezoelectric module 150. The displacement sensor can detect the position information of the firing pin assembly 120 and feed the position information back to the circuit control component 180. After receiving the position information, the circuit control component 180 sends a control command to the piezoelectric module 150 according to the position information, thereby adjusting the stroke of the piezoelectric module 150, thereby changing the stroke of the firing pin assembly 120.

[0059] For example, when the displacement sensor detects an upward displacement of the impact pin assembly 120, the impact pin assembly 120 needs to move downward a greater distance during operation to contact the adhesive at the nozzle 260. At this time, the circuit control component 180 controls the piezoelectric module 150 to increase the reciprocating stroke, thereby increasing the stroke of the impact pin assembly 120. This ensures that the impact pin assembly 120 can still contact the adhesive at the nozzle 260, achieving the preset spray control target. The displacement sensor can be an LVDT sensor, which can measure the position of the impact pin assembly 120 more precisely.

[0060] Furthermore, the piezoelectric injection valve 10 also includes a nozzle nut 500, which is provided with a nozzle 260 positioning groove. The nozzle 260 is located in the nozzle 260 positioning groove. The nozzle nut 500 is sleeved on the outside of the flow channel 250 body and threadedly connected to the flow channel assembly 200. When the nozzle nut 500 is threadedly engaged with the flow channel assembly 200, the nozzle 260 abuts against the liquid outlet end of the flow channel 250, thereby fixing the nozzle 260 through the thread.

[0061] This embodiment also provides a spraying device, which includes the piezoelectric jet valve 10 as described above, thus the spraying device has high disassembly and assembly efficiency.

[0062] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

[0063] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, combinations, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A piezoelectric injection valve, characterized in that, Includes the main body, flow channel components, and support components; The flow channel assembly is detachably inserted into the main body, and its outer side wall is provided with a first moving groove and a second moving groove, the first moving groove being distributed along the axial direction of the flow channel assembly; The second movable groove surrounds the sidewall of the flow channel assembly and is vertically connected to the first movable groove; The abutting component is connected to the main body and abuts against the inner wall of the second moving groove. The abutting component cooperates with the first moving groove and the second moving groove to restrict the movement of the flow channel component. The main body includes a plug-in channel, and a first protrusion is provided on the inner sidewall of the plug-in channel in the circumferential direction. The first protrusion and the top wall of the plug-in channel together define a plug-in groove, and the first protrusion is provided with a plug-in interface. The flow channel assembly includes a plug-in portion, and a second protrusion is provided at intervals on the outer periphery of the plug-in portion. The plug-in portion is located in the plug-in channel, and the second protrusion passes through the plug-in interface and abuts against the first protrusion in the plug-in groove. The abutment assembly includes an abutment member, a pusher member, and a fixing member. The abutment member abuts against the inner wall of the second moving groove. The pusher member is connected to the abutment member and is used to push the abutment member to move toward the flow channel assembly. The fixing member is detachably connected to the abutment member and is used to fix the abutment member. The second moving groove includes a moving channel and a positioning recess disposed on the moving channel. The depth of the positioning recess is greater than that of the moving channel, and its shape is adapted to the abutment. The abutment abuts against the inner wall of the positioning recess.

2. The piezoelectric injection valve according to claim 1, characterized in that, The pushing member includes an elastic member and a slider. The slider is connected to the supporting member. The elastic member transmits a pushing force to the supporting member through the slider, causing the supporting member to abut against the second moving groove.

3. The piezoelectric injection valve according to claim 1, characterized in that, The supporting member is a rotatable sphere, and the first and second moving grooves are arc-shaped grooves, with the shape and size of the first and second moving grooves adapted to the supporting member.

4. The piezoelectric injection valve according to claim 1, characterized in that, The positioning recesses are multiple and are equidistantly distributed around the outer periphery of the flow channel assembly.

5. The piezoelectric injection valve according to claim 1, characterized in that, The flow channel assembly includes an observation port, a flow channel, a nozzle, a sealing groove, and a sealing assembly; The flow channel connects the nozzle and the sealing assembly. The sealing assembly is disposed in the sealing groove to prevent the flow channel and the sealing groove from communicating. The observation hole is located on the outer wall of the flow channel assembly and communicates with the sealing groove.

6. The piezoelectric injection valve according to claim 1, characterized in that, The piezoelectric injection valve also includes an adjustment groove, a firing pin channel, a firing pin assembly, and an adjustment knob; The flow channel assembly is inserted into one end of the firing pin assembly; the adjustment groove is disposed on the outer wall of the main body and communicates with the firing pin channel; the firing pin assembly is located within the firing pin channel. The adjustment knob is disposed in the adjustment groove and threadedly connected to the firing pin assembly, and is used to control the movement of the firing pin assembly in the firing pin channel.

7. A spraying device, characterized in that, The spraying equipment includes the piezoelectric spray valve as described in any one of claims 1 to 6.

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