Piezoelectric injection valve and dispensing equipment with same

Abstract

The utility model discloses a piezoelectric type injection valve and dispensing equipment with the piezoelectric type injection valve, the piezoelectric type injection valve comprises a valve body, a valve head and a piezoelectric type driving mechanism, the valve body is internally provided with a valve chamber; the valve head is arranged on the valve body and provided with a firing pin and a first elastic reset piece, and the first elastic reset piece is used for driving the firing pin to reset upwards. The piezoelectric type driving mechanism comprises a driving rod, a piezoelectric ceramic pile column and a second elastic reset piece, the driving rod is provided with an acting end and a reset end, the driving rod is arranged in the valve chamber in a pivoting mode around a first pivoting point, and the acting end is adjacent to the upper end of the firing pin. The piezoelectric ceramic stack column is arranged in the valve chamber, and the lower end of the piezoelectric ceramic stack column abuts against a first position on the driving rod; the second elastic reset piece is arranged at the reset end, and the second elastic reset piece generates downward elastic reset acting force on the reset end. According to the piezoelectric type injection valve, the relevant structural design of the firing pin part can be simplified, and the reliability and the stability of the motion of the firing pin are guaranteed.

Description

Technical Field

[0001] The utility model relates to dispensing equipment, in particular to a piezoelectric injection valve and dispensing equipment having the same. Background Art

[0002] The piezoelectric injection valve is a precision fluid control device, which is widely used in fields such as precision manufacturing and the electronics industry. It utilizes the principle that piezoelectric ceramics generate minute deformations under the action of an electric field, and realizes the high-frequency and high-precision injection of liquid or colloid by controlling the rapid movement of the plunger. The piezoelectric injection valve has the advantages of fast response speed, controllable injection volume, high repeatability precision, etc., and can meet the requirements of modern industry for micro and precise dispensing.

[0003] In the related art, the piezoelectric injection valve includes a valve head and a valve body. A plunger and a plunger return spring are arranged in the valve head. A plunger driving mechanism is arranged in the valve body, and the driving mechanism generally includes a rotating rod and a piezoelectric ceramic stack column. One end of the rotating rod is pivotally connected in the valve body, and the other end of the rotating rod is adjacent to the upper end of the plunger. In order to reset the rotating rod, a rod return spring needs to be coaxially sleeved outside the upper end of the plunger. Therefore, two springs need to be coaxially sleeved outside the plunger, which results in a complex structure, large space size, and reduced reliability of the related parts of the plunger. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the related art to some extent. For this purpose, the purpose of the utility model is to provide a piezoelectric injection valve and dispensing equipment having the same.

[0005] To achieve the above purpose, on the one hand, according to an embodiment of the utility model, the piezoelectric injection valve includes:

[0006] A valve body having a valve chamber therein;

[0007] A valve head provided on the valve body, and the valve head has a plunger and a first elastic reset member. The plunger is slidable in the valve head in the up and down direction, and the first elastic reset member is used to drive the plunger to reset upward;

[0008] A piezoelectric driving mechanism provided in the valve chamber for driving the plunger to move downward in the valve head to extrude the colloid;

[0009] The piezoelectric driving mechanism includes a driving rod, a piezoelectric ceramic stack column and a second elastic reset member. The driving rod has an acting end and a reset end. The driving rod is pivotally arranged in the valve chamber around a first pivot point, and the first pivot point is located between the acting end and the reset end. The acting end is adjacent to the upper end of the plunger;

[0010] The piezoelectric ceramic stack column is arranged in the valve chamber, and its lower end abuts against a first position on the driving rod, and the first position is located between the acting end and the first pivot point; the second elastic reset member is arranged at the reset end, and the second elastic reset member generates a downward elastic reset acting force on the reset end.

[0011] According to the piezoelectric injection valve provided by the embodiment of the present invention, the piezoelectric driving mechanism includes a driving rod, a piezoelectric ceramic stack column and a second elastic reset member. The driving rod has an acting end and a reset end. The driving rod is pivotally arranged in the valve chamber around a first pivot point. The first pivot point is located between the acting end and the reset end. The acting end is adjacent to the upper end of the ejector pin. The second elastic reset member is arranged at the reset end, and the second elastic reset member generates a downward elastic reset acting force on the reset end. In other words, the driving rod adopts a lever structure, and the second elastic reset member is located at the reset end far from the acting end and the ejector pin. By using the elastic acting force of the second elastic reset member on the reset end, the reset of the driving rod can be realized. This reset structure can simplify the relevant structural design of the ejector pin part, ensure the reliability and stability of the movement of the ejector pin, and in addition, the structure is more simple and compact.

[0012] In addition, the piezoelectric injection valve according to the above embodiment of the present invention may further have the following additional technical features:

[0013] According to an embodiment of the present invention, a limit adjustment mechanism is further included. The limit adjustment mechanism is arranged on the valve body to adjust the stroke of the piezoelectric ceramic stack column to expand and contract.

[0014] According to an embodiment of the present invention, the limit adjustment mechanism includes:

[0015] A pivot block, one end of the pivot block is pivotally arranged in the valve chamber around a second pivot point and is located above the piezoelectric ceramic stack column. The upper end of the piezoelectric ceramic stack column abuts against a second position on the pivot block, and the second position is located between the two ends of the pivot block;

[0016] An adjustment screw rod, the adjustment screw rod is threadedly connected to the valve body and is located above the pivot block. The lower end of the adjustment screw rod extends into the valve chamber and abuts against the other end of the pivot block.

[0017] According to an embodiment of the present invention, the limit adjustment mechanism includes a third elastic reset member. The third elastic reset member is arranged below the pivot block, and abuts against the other end of the pivot block and generates an upward elastic reset acting force on the pivot block.

[0018] According to an embodiment of the present invention, a ejector pin detection assembly is further arranged in the valve chamber. The ejector pin detection assembly is adjacent to the acting end to detect the position of the ejector pin.

[0019] According to an embodiment of the present invention, the striker detection assembly includes:

[0020] a gear, which is arranged in the valve chamber;

[0021] a sliding block, which is slidably arranged in the valve chamber in the up-down direction, and a plurality of tooth portions are arranged on the sliding block, the plurality of tooth portions are arranged at intervals in the up-down direction, and at least part of the plurality of tooth portions are meshed with the gear;

[0022] a detector, which is arranged on the sliding block and above the striker;

[0023] a first locking member, which is arranged on the sliding block and is used for selectively locking and fixing the sliding block and the valve body.

[0024] According to an embodiment of the present invention, the detector is a reflective photoelectric detector, and the acting end is provided with a clearance opening for the light of the reflective photoelectric detector to pass through.

[0025] According to an embodiment of the present invention, it further includes a vortex tube cooler. A groove is arranged on the surface of the valve body, and the vortex tube cooler is installed on the surface of the valve body and closes the groove to define the valve chamber, and the valve chamber is cooled by the vortex tube cooler.

[0026] According to an embodiment of the present invention, it further includes a quick-release mechanism, and the quick-release mechanism includes:

[0027] a connecting seat, which is fixed on one side of the valve body, and the connecting seat has a dovetail guide rail, and the dovetail guide rail extends in the up-down direction;

[0028] a quick-release seat, which has a fixed stopper and a movable stopper. The fixed stopper is fixedly arranged on one side of the quick-release seat, the movable stopper is movably arranged on the other side of the quick-release seat, and together with the fixed stopper, a dovetail groove that slidably cooperates with the dovetail guide rail is defined;

[0029] a second locking member, which is arranged on the quick-release seat and is used for selectively locking the movable stopper and the quick-release seat so that the dovetail groove and the dovetail guide rail are relatively locked and fixed.

[0030] On the other hand, the dispensing device according to the embodiment of the present invention has the piezoelectric jet valve as described above.

[0031] The dispensing device provided according to the embodiment of the present invention has the above-mentioned piezoelectric jet valve. Therefore, it has higher reliability and stability, and the structure is simpler and more compact.

[0032] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0034] Figure 1 is a schematic structural diagram of a piezoelectric injection valve according to an embodiment of the present utility model;

[0035] Figure 2 is a cross-sectional view of a piezoelectric injection valve according to an embodiment of the present utility model;

[0036] Figure 3 is an exploded view of a piezoelectric injection valve according to an embodiment of the present utility model;

[0037] Figure 4 is another exploded view of a piezoelectric injection valve according to an embodiment of the present utility model.

[0038] Reference numerals:

[0039] 10, valve body;

[0040] H10, valve chamber;

[0041] 20, valve head;

[0042] 201, striker;

[0043] 202, first elastic reset member;

[0044] 30, piezoelectric drive mechanism;

[0045] 301, drive rod;

[0046] D31, acting end;

[0047] D32, reset end;

[0048] 302, piezoelectric ceramic stack column;

[0049] 303, second elastic reset member;

[0050] H30, clearance hole;

[0051] A1, first pivot point;

[0052] 40. Limit adjustment mechanism;

[0053] 401. Pivot block;

[0054] 402. Adjusting screw;

[0055] 403. Third elastic reset member;

[0056] A2. Second pivot point;

[0057] 50. Firing pin detection assembly;

[0058] 501. Gear;

[0059] 502. Sliding block;

[0060] 5021. Tooth part;

[0061] 503. Detector;

[0062] 504. First locking member;

[0063] 60. Vortex tube cooler;

[0064] 70. Quick-release mechanism;

[0065] 701. Connecting seat;

[0066] 7011. Dovetail guide rail;

[0067] 702. Quick-release seat;

[0068] 7021. Fixed stop member;

[0069] 7022. Movable stop member;

[0070] 703. Second locking member.

[0071] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0072] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0073] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0074] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0075] In the present utility model, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0076] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0077] The piezoelectric jet valve and the dispensing device having the same according to the embodiments of the present utility model will be described in detail below with reference to the drawings.

[0078] Refer to Figures 1 to 4 As shown, the piezoelectric jet valve according to the embodiments of the present utility model includes a valve body 10, a valve head 20 and a piezoelectric driving mechanism 30.

[0079] Specifically, the valve body 10 has a valve chamber H10, which is mainly used for installing the piezoelectric driving mechanism 30.

[0080] The valve head 20 is provided on the valve body 10, and the valve head 20 has a striker 201 and a first elastic reset member 202. The striker 201 is slidable in the valve head 20 in the up and down direction, and the first elastic reset member 202 is used to drive the striker 201 to reset upward. It can be understood that the valve head 20 has a glue cavity and a glue inlet channel. The glue inlet channel can be connected to a glue supply device, and the glue supply device continuously supplies glue to the glue cavity. Each time the striker 201 strikes, it passes through the glue cavity and extrudes the glue in the glue cavity.

[0081] The piezoelectric driving mechanism 30 is provided in the valve chamber H10 and is used to drive the striker 201 to move downward in the valve head 20 to extrude the glue.

[0082] The piezoelectric driving mechanism 30 includes a driving rod 301, a piezoelectric ceramic stack column 302, and a second elastic reset member 303. The driving rod 301 has an acting end D31 and a reset end D32. The driving rod 301 is pivotally provided in the valve chamber H10 around a first pivot point A1. The first pivot point A1 is located between the acting end D31 and the reset end D32, and the acting end D31 is adjacent to the upper end of the striker 201. Since the first pivot point A1 is located between the acting end D31 and the reset end D32, when the driving rod 301 rotates around the first pivot point A1, the movement directions of the acting end D31 and the reset end D32 are opposite. For example, when the acting end D31 moves downward, the reset end D32 moves upward.

[0083] The piezoelectric ceramic stack column 302 is provided in the valve chamber H10 and its lower end abuts against a first position on the driving rod 301. The first position is located between the acting end D31 and the first pivot point A1. The second elastic reset member 303 is provided at the reset end D32, and the second elastic reset member 303 generates a downward elastic reset force on the reset end D32.

[0084] When the piezoelectric ceramic stack column 302 is energized, the piezoelectric effect occurs, causing the piezoelectric ceramic stack column 302 to deform, such as elongating or shortening. When the piezoelectric ceramic stack column 302 elongates, the piezoelectric ceramic stack column 302 exerts a downward pressure on the first position on the upper part of the driving rod 301, causing the driving rod 301 to rotate, and the acting end D31 moves downward, and then presses the upper end of the firing pin 201 below it, causing the firing pin 201 to move downward to extrude the colloid in the valve head 20. During this process, the reset end D32 moves upward, causing the second elastic reset member 303 to be compressed. When the piezoelectric ceramic stack column 302 is de-energized or the electric field changes, the piezoelectric ceramic stack column 302 returns to its original shape, the acting force on the driving rod 301 disappears, the second elastic reset member 303 resumes deformation, forcing the reset end D32 to move downward, and then causing the driving rod 301 to rotate in the reverse direction, the acting end D31 moves upward and away from the firing pin 201, and the firing pin 201 quickly resets under the action of the first elastic reset member 202. By repeatedly controlling the voltage applied to the piezoelectric ceramic stack column 302, the firing pin 201 moves repeatedly, thereby realizing the dispensing operation.

[0085] According to the piezoelectric injection valve provided by the embodiment of the present invention, the piezoelectric drive mechanism 30 includes a driving rod 301, a piezoelectric ceramic stack column 302 and a second elastic reset member 303. The driving rod 301 has an acting end D31 and a reset end D32. The driving rod 301 is pivotally arranged in the valve chamber H10 around a first pivot point A1. The first pivot point A1 is located between the acting end D31 and the reset end D32. The acting end D31 is adjacent to the upper end of the firing pin 201. The second elastic reset member 303 is arranged at the reset end D32, and the second elastic reset member 303 generates a downward elastic reset acting force on the reset end D32. In other words, the driving rod 301 adopts a lever structure. The second elastic reset member 303 is located at the reset end D32 far from the acting end D31 and the firing pin 201. By using the elastic acting force of the second elastic reset member 303 on the reset end D32, the reset of the driving rod 301 can be realized. This reset structure can simplify the relevant structural design of the firing pin 201 part, ensure the reliability and stability of the movement of the firing pin 201, and in addition, the structure is more simple and compact.

[0086] Refer to Figures 2 to 3 As shown, in some embodiments of the present invention, a limit adjustment mechanism 40 is further included. The limit adjustment mechanism 40 is arranged on the valve body 10 to adjust the stroke of the piezoelectric ceramic stack column 302 to expand and contract.

[0087] The limit adjustment mechanism 40 is used to precisely control the telescopic stroke of the piezoelectric ceramic stack column 302. By adjusting this stroke, the movement range of the drive rod 301 can be directly affected, thereby controlling the movement distance of the firing pin 201, and ultimately achieving the adjustment of the dispensing amount of glue, adapting to different application requirements, ensuring the consistency of each dispensing, improving the dispensing quality. Moreover, this design provides the ability for quick adjustment, enabling the device to flexibly adapt to colloids with different viscosities or different dispensing requirements. In addition, it also functions as a protection mechanism to prevent the piezoelectric ceramic stack column 302 from overextending, thus protecting the piezoelectric ceramic stack column 302.

[0088] Referring to Figures 2 to 3 As shown, in an embodiment of the present invention, the limit adjustment mechanism 40 includes a pivot block 401 and an adjustment screw 402. One end of the pivot block 401 is pivotally arranged in the valve chamber H10 around the second pivot point A2 and is located above the piezoelectric ceramic stack column 302. The upper end of the piezoelectric ceramic stack column 302 abuts against the second position on the pivot block 401, and the second position is located between the two ends of the pivot block 401.

[0089] The adjustment screw 402 is threadedly connected to the valve body 10 and is located above the pivot block 401. The lower end of the adjustment screw 402 extends into the valve chamber H10 and abuts against the other end of the pivot block 401. This design allows for precisely controlling the position of the pivot block 401 by rotating the adjustment screw 402, thereby indirectly adjusting the maximum elongation distance of the piezoelectric ceramic stack column 302.

[0090] When the adjustment screw 402 is rotated, its lower end will push or release one end of the pivot block 401. Since the pivot block 401 can rotate around the second pivot point A2, this movement will cause the other end of the pivot block 401 (the end in contact with the piezoelectric ceramic stack column 302) to move accordingly, thereby changing the limit position of the piezoelectric ceramic stack column 302.

[0091] This design utilizes the slight movement of the adjustment screw 402 to convert it into a more precise position adjustment at the end of the piezoelectric ceramic stack column 302. This enables the operator to make extremely fine adjustments to meet the requirements of high-precision dispensing applications. At the same time, this design also provides good operability, making the adjustment process simple and precise. In addition, the reliability and stability of this design are high. The combination of the pivot block 401 and the adjustment screw 402 can maintain the accuracy of adjustment during long-term use.

[0092] Referring to Figure 2As shown, in an embodiment of the present utility model, the limit adjustment mechanism 40 includes a third elastic reset member 403. The third elastic reset member 403 is disposed below the pivot block 401, abuts against the other end of the pivot block 401, and generates an upward elastic reset acting force on the pivot block 401.

[0093] The elastic reset acting force provided by the third elastic reset member 403 is opposite to the downward acting force applied by the adjustment screw 402. Using this elastic reset acting force, the position of the pivot block 401 can be balanced, effectively reducing the shaking of the pivot block 401 and improving the stability. In addition, the third elastic reset member 403 also endows the limit adjustment mechanism 40 with the characteristic of quick response. When the adjustment screw 402 moves upward, under the elastic reset acting force, it can push the pivot block 401 to move upward quickly. This quick response characteristic is beneficial for quick and precise adjustment. And during long-term use, if other components have minor deformations or wear, the third elastic reset member 403 can also perform automatic compensation to a certain extent, which helps to maintain long-term stability and precision.

[0094] Refer to Figures 2 to 3 As shown, in some embodiments of the present utility model, a striker detection assembly 50 is further disposed in the valve chamber H10. The striker detection assembly 50 is adjacent to the acting end D31 for detecting the position of the striker 201.

[0095] In this embodiment, by detecting the position of the striker 201 through the striker detection assembly 50, the stability and reliability of the dispensing process can be achieved. For example, during the dispensing process, if an abnormal position of the striker 201 is detected, an alarm can be given immediately or the machine can be stopped to prevent the production of unqualified products, thereby improving product quality and production efficiency.

[0096] In an embodiment of the present utility model, the striker detection assembly 50 includes a gear 501, a sliding block 502, a detector 503, and a first locking member 504. The gear 501 is disposed in the valve chamber H10.

[0097] The sliding block 502 is slidably disposed in the valve chamber H10 in the vertical direction, and a plurality of tooth portions 5021 are provided on the sliding block 502. The plurality of tooth portions 5021 are spaced apart in the vertical direction, and at least some of the plurality of tooth portions 5021 are engaged with the gear 501.

[0098] The detector 503 is disposed on the sliding block 502 and above the striker 201. By sliding the sliding block 502 in the vertical direction, the detector 503 can be synchronously slid up and down, thereby realizing the adjustment of the position of the detector 503.

[0099] The first locking member 504 is provided on the sliding block 502 for selectively locking and fixing the sliding block 502 to the valve body 10. After the sliding block 502 slides to the desired position, the sliding block 502 can be locked and fixed to the valve body 10 through the first locking member 504, so as to fix the detector 503 at the desired position. Exemplarily, the first locking member 504 can be a locking bolt. A waist-shaped hole can be provided on the sliding block 502, and a threaded hole is provided on the valve body 10. The locking bolt passes through the waist-shaped hole and is threadedly connected to the threaded hole.

[0100] In this embodiment, by adopting the striker detection assembly 50 with the above structure, the position of the detector 503 can be adjusted quickly and flexibly. This adjustment design can meet and adapt to the stroke adjustment of the piezoelectric ceramic stack column 302, so that the piezoelectric jet valve can flexibly adjust the stroke of the piezoelectric ceramic stack column 302 according to process requirements, and correspondingly adjust the position of the detector 503 to achieve different dispensing requirements.

[0101] Preferably, the detector 503 is a reflective photoelectric detector 503, and a clearance opening H30 is provided at the acting end D31 for the light of the reflective photoelectric detector 503 to pass through. The reflective photoelectric detector 503 is installed on the sliding block 502 and is located above the striker 201. It emits light downward, and these lights pass through the clearance opening H30 of the acting end D31 and are then reflected back by the surface of the striker 201. By analyzing the intensity and time of the reflected light, the detector 503 can accurately determine the position of the striker 201.

[0102] Refer to Figure 1 and Figure 3 As shown in, in an embodiment of the present invention, the piezoelectric jet valve further includes a vortex tube cooler 60. A groove is provided on the surface of the valve body 10, and the vortex tube cooler 60 is installed on the surface of the valve body 10 and closes the groove to define the valve chamber H10, and the valve chamber H10 is cooled by the vortex tube cooler 60.

[0103] The working principle of the vortex tube cooler 60 is based on the vortex tube effect, using compressed gas to generate the phenomenon of cold and heat separation. When the compressed gas enters the vortex tube at a high speed in the tangential direction, a strong rotating air flow will be formed in the tube. This rotational movement causes the gas to be separated into two cold and hot air flows. The cold air flow is discharged from one end for cooling the valve chamber H10, while the hot air flow is discharged from the other end.

[0104] In this embodiment, the vortex tube cooler 60 can quickly cool down, solve the problem of rapid heat accumulation of the piezoelectric jet valve during high-frequency operation, improve the reliability and stability of the operation of the jet valve, and enable the piezoelectric jet valve to maintain stable performance under higher frequency and longer working conditions.

[0105] Referring to Figure 4 as shown, in some embodiments of the present utility model, the piezoelectric injection valve further includes a quick-release mechanism 70. The quick-release mechanism 70 includes a connecting seat 701, a quick-release seat 702 and a second locking member 703. The connecting seat 701 is fixed on one side of the valve body 10, and the connecting seat 701 has a dovetail guide rail 7011 which extends in the up and down direction.

[0106] The quick-release seat 702 has a fixed stopper 7021 and a movable stopper 7022. The fixed stopper 7021 is fixedly arranged on one side of the quick-release seat 702, and the movable stopper 7022 is movably arranged on the other side of the quick-release seat 702, and together with the fixed stopper 7021, they define a dovetail groove that slidably cooperates with the dovetail guide rail 7011. In specific applications, the quick-release seat 702 can usually be fixed to the dispensing robot by means of screws or the like.

[0107] The second locking member 703 is arranged on the quick-release seat 702 for selectively locking the movable stopper to the quick-release seat 702 so that the dovetail groove and the dovetail guide rail 7011 are locked and fixed relative to each other.

[0108] During the assembly process, the operator aligns the connecting seat 701 on the piezoelectric injection valve with the quick-release seat 702 on the dispensing robot, and ensures that the movable stopper 7022 on the quick-release seat 702 is in the released state, so that the dovetail groove maintains the maximum opening. Then, the operator aligns the dovetail groove on the quick-release seat 702 with the dovetail guide rail 7011 on the connecting seat 701 and inserts them, so that the dovetail guide rail 7011 on the connecting seat 701 slides into the dovetail groove of the quick-release seat 702. Further, the position of the piezoelectric injection valve is slidably adjusted. When the connecting seat 701 slides to the predetermined position, the operator activates the second locking member 703 to lock the movable stopper 7022 by using the second locking member 703, so that the connecting seat 701 and the quick-release seat 702 are locked and fixed. In this way, the piezoelectric injection valve can be quickly assembled to the dispensing robot.

[0109] By adopting the above quick-release mechanism 70, it is possible to quickly assemble the piezoelectric injection valve to the dispensing robot during application. The assembly process is simple, and the assembly is accurate, safe and reliable.

[0110] The dispensing device according to the embodiment of the present utility model has the piezoelectric injection valve as described above.

[0111] The dispensing device provided according to the embodiment of the present utility model has the above piezoelectric injection valve. Therefore, it has higher reliability and stability, and the structure is simpler and more compact.

[0112] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0113] The above are only the preferred embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A piezoelectric injection valve, characterized in that, Comprising: A valve body, within which there is a valve chamber; A valve head, which is provided on the valve body, and the valve head has a firing pin and a first elastic reset member. The firing pin is slidable in the valve head in the up and down direction, and the first elastic reset member is used to drive the firing pin to reset upward; A piezoelectric drive mechanism, which is provided in the valve chamber and is used to drive the firing pin to move downward in the valve head to extrude the colloid; The piezoelectric drive mechanism includes a drive rod, a piezoelectric ceramic stack column and a second elastic reset member. The drive rod has an acting end and a reset end. The drive rod is pivotally provided in the valve chamber around a first pivot point, and the first pivot point is located between the acting end and the reset end. The acting end is adjacent to the upper end of the firing pin; The piezoelectric ceramic stack column is provided in the valve chamber and its lower end abuts against a first position on the drive rod. The first position is located between the acting end and the first pivot point; the second elastic reset member is provided at the reset end, and the second elastic reset member generates a downward elastic reset force on the reset end.

2. The piezoelectric jet valve according to claim 1, wherein It further includes a limit adjustment mechanism, which is provided on the valve body and is used to adjust the stroke of the telescopic movement of the piezoelectric ceramic stack column.

3. The piezoelectric injection valve according to claim 2, wherein The limit adjustment mechanism includes: A pivot block, one end of which is pivotally provided in the valve chamber around a second pivot point and is located above the piezoelectric ceramic stack column. The upper end of the piezoelectric ceramic stack column abuts against a second position on the pivot block, and the second position is located between the two ends of the pivot block; An adjustment screw, which is threadedly connected to the valve body and is located above the pivot block. The lower end of the adjustment screw extends into the valve chamber and abuts against the other end of the pivot block.

4. The piezoelectric injection valve according to claim 3, wherein, The limit adjustment mechanism includes a third elastic reset member, which is provided below the pivot block and abuts against the other end of the pivot block and generates an upward elastic reset force on the pivot block.

5. The piezoelectric injection valve according to claim 1, characterized in that, A firing pin detection assembly is further provided in the valve chamber. The firing pin detection assembly is adjacent to the acting end and is used to detect the position of the firing pin.

6. The piezoelectric jet valve according to claim 1, characterized in that, The firing pin detection assembly includes: A gear, which is provided in the valve chamber; A sliding block, which is slidably provided in the valve chamber in the up and down direction, and a plurality of tooth portions are provided on the sliding block. The plurality of tooth portions are arranged at intervals in the up and down direction, and at least some of the plurality of tooth portions are engaged with the gear; A detector, which is provided on the sliding block and is located above the firing pin; A first locking member, which is provided on the sliding block and is used to selectively lock and fix the sliding block to the valve body.

7. The piezoelectric jet valve according to claim 6, wherein, The detector is a reflective photoelectric detector, and an avoidance opening is provided at the acting end for the light of the reflective photoelectric detector to pass through.

8. The piezoelectric injection valve according to claim 1, characterized in that, It further includes a vortex tube cooler. A groove is provided on the surface of the valve body, and the vortex tube cooler is installed on the surface of the valve body and closes the groove to define and form the valve chamber, and the valve chamber is cooled by the vortex tube cooler.

9. The piezoelectric injection valve according to claim 1, characterized in that It further includes a quick-release mechanism, and the quick-release mechanism includes: Connecting seat, the connecting seat is fixed on one side of the valve body, and the connecting seat has a dovetail guide rail, and the dovetail guide rail extends in the up and down direction; Quick-release seat, the quick-release seat has a fixed stop and a movable stop, the fixed stop is fixedly arranged on one side of the quick-release seat, the movable stop is movably arranged on the other side of the quick-release seat, and together with the fixed stop defines a dovetail groove that slidably cooperates with the dovetail guide rail; Second locking member, the second locking member is arranged on the quick-release seat to selectively lock the movable stop to the quick-release seat so that the dovetail groove and the dovetail guide rail are locked and fixed relative to each other.

10. A dispensing device, characterized in that, A piezoelectric injection valve having any one of claims 1 to 9.

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