Piezoelectric spray valve

Abstract

The utility model is suitable for the technical field of atomization, and provides a piezoelectric spray valve which comprises a main body part, a glue outlet nozzle, a firing pin, a piezoelectric driving assembly and an atomization structure. The firing pin can move between the blocking position and the opening position under the action of the piezoelectric driving assembly, and when the firing pin is located at the blocking position, the end of the firing pin abuts against and blocks the inlet of the glue outlet nozzle. When the firing pin is positioned at the opening position, the end part of the firing pin is far away from the glue outlet nozzle and is spaced from the inlet of the glue outlet nozzle, so that the inlet of the glue outlet nozzle can be communicated with the working cavity. By means of the characteristic that the piezoelectric driving assembly is high in driving speed and state conversion speed, the piezoelectric driving assembly is adopted to drive the firing pin to move between the plugging position and the opening position, and the response speed of valve body opening and closing control can be increased. And meanwhile, the voltage applied to the piezoelectric driving assembly can be changed to adjust the glue outlet amount of the glue outlet nozzle, so that the spray valve is more convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of spraying, and in particular relates to a piezoelectric spray valve. Background Art

[0002] Spray valves are devices used for spraying glue, such as paint, silicone, and UV glue, with low viscosity adhesives. They are widely used in machinery manufacturing, semiconductors, PCB (Printed Circuit Board) manufacturing, and SMT (Surface Mount Technology) manufacturing, for example, in applications such as mobile phone case exterior painting, flux spraying, and surface coating. However, existing spray valves often suffer from slow on / off control response speeds. Utility Model Content

[0003] The purpose of the utility model is to provide a piezoelectric spray valve, aiming to solve the technical problem of slow switch control response speed when the spray valve is used in the prior art.

[0004] The utility model is implemented as follows: a piezoelectric spray valve is provided, comprising:

[0005] The main body has a working cavity for communicating with the glue supply structure;

[0006] A glue discharge nozzle is mounted on the main body and communicated with the working chamber;

[0007] a striker, at least one end of which is located in the working chamber and has the freedom to move relative to the main body, the striker having a blocking position and an open position, wherein when the striker is in the blocking position, the end of the striker abuts and blocks the inlet of the glue discharge nozzle, and when the striker is in the open position, the end of the striker is away from the glue discharge nozzle and spaced apart from the inlet of the glue discharge nozzle;

[0008] a piezoelectric drive assembly, wherein a driving end of the piezoelectric drive assembly is connected to the striker, and the piezoelectric drive assembly is used to drive the striker to move between the blocking position and the open position;

[0009] The atomizing structure is arranged on the main body and is used for atomizing the glue liquid sprayed out by the glue discharge nozzle.

[0010] In an optional embodiment, the piezoelectric drive component has a working state and a non-working state. When the piezoelectric drive component is in the non-working state, the striker is located in the blocking position under the action of the piezoelectric drive component. When the piezoelectric drive component is in the working state, it has a pulse mode and a continuous mode. In the pulse mode, the piezoelectric drive component is used to drive the striker to vibrate at high frequency between the blocking position and the open position. In the continuous mode, the piezoelectric drive component is used to drive the striker to be continuously in the open position.

[0011] In an optional embodiment, the atomization structure includes an atomization nozzle, which is connected to the main body. The interior of the atomization nozzle has a accommodating channel with both ends open. The glue discharge nozzle is inserted into the accommodating channel. The outer wall of the glue discharge nozzle and the inner wall of the accommodating channel are spaced apart to form an atomization channel for gas to pass through. The atomization channel is used to communicate with an external high-pressure gas source to atomize the glue sprayed from the glue discharge nozzle by high-pressure gas.

[0012] In an optional embodiment, a tensioning seat is provided on the main body, the tensioning seat is detachably connected to the main body, and the tensioning seat is used to apply a force toward the main body to the atomizing nozzle to press and fix the atomizing nozzle to the main body.

[0013] In an optional embodiment, a mounting through hole is provided on the tensioning seat, the atomizing nozzle is installed in the mounting through hole, and the outer wall of the atomizing nozzle is connected to the inner wall of the mounting through hole, so that the tensioning seat applies force to the atomizing nozzle toward the main body.

[0014] In an optional embodiment, a first sealing ring is provided between the atomizing nozzle and the inner wall of the mounting through hole, and the first sealing ring is provided around the atomizing nozzle.

[0015] In an optional embodiment, a tightening conical surface is provided at one end of the mounting through hole close to the main body, the first sealing ring is sleeved on the outside of the atomizing nozzle, and after the atomizing nozzle is installed, the first sealing ring abuts against the tightening conical surface.

[0016] In an optional embodiment, an annular groove is further provided on the circumference of the atomizing nozzle, and the annular groove and the inner wall of the mounting through hole are formed into a rectifying cavity, and a first air vent is provided on the tightening seat, and the first air vent is used to connect the rectifying cavity with an external air source, and a plurality of second air vents are also provided on the atomizing nozzle, and the second air vents are used to connect the rectifying cavity with the atomizing channel, and the plurality of second air vents are evenly distributed around the atomizing channel.

[0017] In an optional embodiment, the glue discharge nozzle includes a nozzle body, a mounting portion, and a glue discharge channel for glue liquid to pass through, the mounting portion is arranged at one end of the nozzle body facing the main body, the glue discharge channel passes through the nozzle body and the mounting portion, the nozzle body is inserted into the accommodating channel, the first side of the mounting portion abuts against the atomizing nozzle, and the second side of the mounting portion abuts against the side of the main body under the action of the atomizing nozzle.

[0018] In an optional embodiment, an adjustment sleeve is provided between the glue discharge nozzle and the main body, and an avoidance channel is provided on the adjustment sleeve for the passage of the striker and the glue liquid. The first end of the adjustment sleeve is movably connected to the main body, and the second end extends in a direction away from the main body, and the second side of the mounting portion abuts against the second end of the adjustment sleeve.

[0019] The present invention provides the following technical advantages over the prior art: a working chamber is provided on the main body for communicating with a glue supply structure, allowing glue liquid to enter the working chamber under the action of the glue supply structure. A glue discharge nozzle is also mounted on the main body, communicating with the working chamber, allowing glue liquid to be sprayed from the outlet of the glue discharge nozzle and atomized by the atomization structure after discharge. Furthermore, by positioning at least one end of a striker within the working chamber, the striker can be moved between a blocked position and an open position under the action of a piezoelectric drive assembly. When the striker is in the blocked position, the end of the striker abuts and blocks the inlet of the glue discharge nozzle, thereby blocking the inlet of the glue discharge nozzle. When the striker is in the open position, the end of the striker is spaced away from the glue discharge nozzle and spaced from the inlet of the glue discharge nozzle, allowing the inlet of the glue discharge nozzle to communicate with the working chamber. Compared to the pneumatic drive method used in the prior art spray valve, the piezoelectric drive assembly is used to drive the striker between the blocked and open positions, leveraging the fast driving speed and rapid state transition characteristics of the piezoelectric drive assembly, thereby improving the response speed of the valve body's opening and closing control. At the same time, the voltage applied to the piezoelectric drive component can be changed to change the movement amplitude of the drive end, thereby adjusting the amplitude of the striker movement, and then adjusting the gap between the end of the striker and the inlet of the glue discharge nozzle when the striker is in the open position. Ultimately, the glue discharge amount of the glue discharge nozzle can be adjusted, making the spray valve more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic structural diagram of a piezoelectric spray valve provided by an embodiment of the present utility model;

[0022] Figure 2 This is a partial structural diagram of a piezoelectric spray valve provided by an embodiment of the present utility model;

[0023] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 This is a schematic structural diagram of the atomizing nozzle used in the embodiment of the present utility model;

[0025] Figure 5 It is a structural schematic diagram of the tensioning seat adopted in the embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Main body; 11. Working chamber; 2. Glue discharge nozzle; 21. Nozzle body; 22. Mounting part; 23. Glue discharge channel; 3. Strike pin; 4. Piezoelectric drive assembly; 5. Atomization structure; 51. Atomization nozzle; 511. Ring groove; 512. Second vent hole; 513. Accommodating channel; 52. Tensioning seat; 521. Mounting through hole; 522. Tensioning conical surface; 523. First vent hole; 53. Atomization channel; 54. Rectification chamber; 6. First sealing ring; 7. Second sealing ring; 8. Adjustment sleeve; 9. Glue supply structure. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0033] Please refer to Figures 1 to 3 As shown, in an embodiment of the present invention, a piezoelectric spray valve is provided, comprising a main body 1, a glue dispensing nozzle 2, a striker 3, a piezoelectric drive assembly 4, and an atomizing structure 5. The main body 1 has a working chamber 11 for communicating with the glue supply structure 9. The glue dispensing nozzle 2 is mounted on the main body 1 and is in communication with the working chamber 11. At least one end of the striker 3 is located within the working chamber 11 and has freedom of movement relative to the main body 1. The striker 3 has a blocked position and an open position. When the striker 3 is in the blocked position, the end of the striker 3 abuts and blocks the inlet of the glue dispensing nozzle 2. When the striker 3 is in the open position, the end of the striker 3 is away from the glue dispensing nozzle 2 and is spaced apart from the inlet of the glue dispensing nozzle 2. The driving end of the piezoelectric drive assembly 4 is connected to the striker 3, and the piezoelectric drive assembly 4 is used to drive the striker 3 to move between the blocked position and the open position. The atomizing structure 5 is disposed on the main body 1 and is used to atomize the glue sprayed from the outlet of the glue dispensing nozzle 2.

[0034] Specifically, the main body 1 refers to a component with a certain volume, and the main body 1 can be in the shape of a block, a block, a column, or a combination of multiple shapes. The working chamber 11 refers to a cavity structure with a certain accommodation space, and the shape of the working chamber 11 is generally columnar, and the working chamber 11 can have two openings. The glue discharge nozzle 2 refers to a component with a certain length, and a channel structure for the glue liquid to pass through is provided on the glue discharge nozzle 2, and the inlet of the glue discharge nozzle 2 can be connected to an opening of the working chamber 11. The striker 3 refers to a component with a certain length, and the striker 3 can be rod-shaped or columnar, and at least one end of the striker 3 can extend into the working chamber 11 from an opening of the working chamber 11, and can contact the inlet of the glue discharge nozzle 2 after passing through another opening of the working chamber 11.

[0035] The piezoelectric drive assembly 4 refers to a device that utilizes the piezoelectric effect and the inverse piezoelectric effect of piezoelectric materials to realize the mutual conversion between electrical energy and mechanical energy. Piezoelectric materials refer to materials that can generate voltage under the action of an external force, or generate mechanical strain by applying voltage. The piezoelectric drive assembly 4 may include a piezoelectric stack portion composed of a plurality of components made of piezoelectric materials and a driving lever. The middle area of ​​the driving lever is hingedly arranged on a fixed component, and the piezoelectric stack portion is connected between the first end of the driving lever and the fixed component. The height of the entire piezoelectric stack portion can be changed by changing the voltage applied to the piezoelectric stack portion, thereby driving the displacement of the first end of the driving lever to change, thereby achieving a change in the displacement of the second end of the driving lever. At this time, the second end of the driving lever can be used to drive other components to move.

[0036] The atomizing structure 5 is a component that converts liquid into tiny droplets to form a mist spray. The atomizing structure 5 can use the energy of high-pressure gas or high-pressure liquid to convert liquid into tiny droplets to form a mist spray. The atomizing structure 5 can also achieve liquid atomization through ultrasonic waves, high-speed vibration, etc.

[0037] The piezoelectric spray valve provided by the embodiment of the present utility model is provided with a working chamber 11 for communicating with the glue supply structure 9 on the main body 1, so that the glue liquid can enter the working chamber 11 under the action of the glue supply structure 9. At the same time, a glue discharge nozzle 2 connected to the working chamber 11 is also installed on the main body 1, so that the glue liquid can be sprayed out from the outlet of the glue discharge nozzle 2 and atomized by the atomization structure 5 after being sprayed. In addition, by setting at least one end of the striker 3 in the working chamber 11, the striker 3 can move between a blocking position and an open position under the action of the piezoelectric drive component 4. When the striker 3 is in the blocking position, the end of the striker 3 abuts and blocks the inlet of the glue discharge nozzle 2 to block the inlet of the glue discharge nozzle 2. When the striker 3 is in the open position, the end of the striker 3 is away from the glue discharge nozzle 2 and is spaced apart from the inlet of the glue discharge nozzle 2, so that the inlet of the glue discharge nozzle 2 can be connected to the working chamber 11. Compared to the pneumatic drive method used in existing spray valves, this design leverages the piezoelectric drive assembly 4's fast drive speed and rapid state transitions to drive the striker 3 between the blocked and open positions, improving the valve body's switching response speed. Furthermore, the voltage applied to the piezoelectric drive assembly 4 can be varied to change the amplitude of the drive end's movement, thereby adjusting the amplitude of the striker's movement. This, in turn, allows the gap between the striker's end and the inlet of the glue discharge nozzle 2 to be adjusted when the striker 3 is in the open position. Ultimately, this allows the glue discharge amount from the glue discharge nozzle 2 to be adjusted, making the spray valve more convenient to use.

[0038] In addition, by improving the response speed of the valve body switch control, the glue discharge nozzle 2 can be quickly opened when it needs to be opened, and can be quickly blocked when it needs to be blocked, which also improves the accuracy of the glue discharge amount.

[0039] In one embodiment, see Figure 1 and Figure 2The piezoelectric drive assembly 4 has a working state and a non-working state. When the piezoelectric drive assembly 4 is in the non-working state, the striker 3 is located in the blocking position under the action of the piezoelectric drive assembly 4. When the piezoelectric drive assembly 4 is in the working state, it has a pulse mode and a continuous mode. In the pulse mode, the piezoelectric drive assembly 4 is used to drive the striker 3 to vibrate at high frequency between the blocking position and the open position. In the continuous mode, the piezoelectric drive assembly 4 is used to drive the striker 3 to be continuously in the open position. Specifically, when the piezoelectric drive assembly 4 is in the working state, it can be a state in which a certain voltage is applied to the piezoelectric component of the piezoelectric drive assembly 4. At this time, the size of the piezoelectric component will change accordingly according to the applied voltage. When the piezoelectric drive assembly 4 is in the non-working state, it can refer to a state in which no voltage is applied to the piezoelectric component. In addition, in the pulse mode in the working state, it can be a state in which the direction of the voltage applied to the piezoelectric component is changed at a high frequency to achieve rapid changes in the size of the piezoelectric component itself, thereby achieving high-frequency vibration of the driving end of the piezoelectric drive assembly 4. Continuous mode applies a voltage in a constant direction to the piezoelectric component of the piezoelectric drive assembly 4, thereby maintaining the firing pin 3 in the open position. When the piezoelectric spray valve is in operation, the piezoelectric drive assembly 4 can have both a pulse mode and a continuous mode. In pulse mode, the piezoelectric drive assembly 4 drives the firing pin 3 to vibrate at a high frequency between the blocked and open positions, thereby achieving pulsed, quantitative discharge of the glue from the glue nozzle. In continuous mode, the piezoelectric drive assembly 4 drives the firing pin 3 away from the inlet of the glue nozzle 2, allowing for continuous glue discharge.

[0040] In one embodiment, see Figure 3 and Figure 4The atomizing structure 5 includes an atomizing nozzle 51, which is connected to the main body 1. The interior of the atomizing nozzle 51 has a receiving channel 513 with both ends open. The glue discharge nozzle 2 is inserted into the receiving channel 513. The outer wall of the glue discharge nozzle 2 and the inner wall of the receiving channel 513 are spaced apart to form an atomizing channel 53 for gas to pass through. The atomizing channel 53 is used to communicate with an external high-pressure gas source to atomize the glue sprayed from the glue discharge nozzle 2 through the high-pressure gas. Specifically, the atomizing nozzle 51 refers to a columnar component with an internal receiving channel 513 with both ends open. The receiving channel 513 of the atomizing nozzle 51 is usually arranged along its own axis, and the receiving channel 513 and the atomizing nozzle 51 are generally coaxially arranged, so that the wall thickness of the atomizing nozzle 51 can be kept uniform. After the glue discharging nozzle 2 is inserted into the accommodating channel 513, the first end of the accommodating channel 513 is in a closed state. The closure of the first end of the accommodating channel 513 can be achieved by abutting the end of the atomizing nozzle 51 against the main body 1, or the closure of the first end of the yielding channel can be achieved by abutting the end of the atomizing nozzle 51 against the glue discharging nozzle 2. The outlet of the glue discharging nozzle 2 can slightly protrude from the second end of the accommodating channel 513, or the outlet of the glue discharging nozzle 2 can also be arranged flush with the second end of the yielding channel. By fitting the atomizing nozzle 51 onto the outside of the glue discharging nozzle 2, the inner wall of the accommodating channel 513 and the outer wall of the glue discharging nozzle 2 are spaced apart to form an atomizing channel 53 surrounding the glue discharging nozzle 2, and the atomizing channel 53 is used to be connected to an external high-pressure gas source. High-pressure gas can be introduced into the atomizing channel 53 while the glue discharging nozzle 2 is spraying glue, and the glue liquid is blown away by the high-pressure gas to form an atomization effect.

[0041] In an alternative embodiment, see Figure 3 The atomizing nozzle 51 is coaxially arranged with the glue discharge nozzle 2, so that the airflow blown out from the atomizing channel 53 is evenly distributed around the glue discharge nozzle 2, thereby ensuring that the glue sprayed out of the glue discharge nozzle 2 is in a uniform conical shape when atomized, thereby improving the quality of atomization.

[0042] In one embodiment, see Figure 3 and Figure 5The main body 1 is provided with a tensioning seat 52, which is detachably connected to the main body 1. The tensioning seat 52 is used to apply force toward the main body 1 to the atomizing nozzle 51, thereby pressing and fixing the atomizing nozzle 51 to the main body 1. Specifically, the tensioning seat 52 is a component with a certain volume. The tensioning seat 52 can be in the form of a block, strip, or plate, or a combination of various shapes. The tensioning seat 52 can be detachably connected to the main body 1 by fasteners or snap-on connection. By detaching the tensioning seat 52 from the main body 1, the tensioning seat 52 contacts the atomizing nozzle 51 after installation, and applying a force toward the main body 1 to the atomizing nozzle 51 to press and fix the atomizing nozzle 51 on the side of the main body 1, the fixation of the atomizing nozzle 51 can be made more secure. At the same time, the tensioning seat 52 is detachably connected to the main body 1, and the tensioning seat 52 can be conveniently removed when the atomizing nozzle 51 needs to be replaced, and then the atomizing nozzle 51 can also be removed, making the replacement of the atomizing nozzle 51 more convenient and quick, and improving the convenience of maintenance of the atomizing nozzle 51.

[0043] In one embodiment, see Figure 3 and Figure 4 , a mounting through hole 521 is provided on the tensioning seat 52, and the atomizing nozzle 51 is installed in the mounting through hole 521, and the outer wall of the atomizing nozzle 51 is connected to the inner wall of the mounting through hole 521, so that the tensioning seat 52 applies a force toward the main body 1 to the atomizing nozzle 51. Specifically, the mounting through hole 521 refers to a hole structure provided on the tensioning seat 52 and open at both ends. When installing, the inner wall of the mounting through hole 521 can be set as a tapered hole, and the outer wall of the atomizing nozzle 51 is also set to a tapered shape that matches the inner wall of the mounting through hole 521, so as to achieve the purpose that the tensioning seat 52 can apply a force to the atomizing nozzle 51 after the atomizing nozzle 51 is installed in the mounting through hole 521. Threads can also be provided on the outside of the atomizing nozzle 51, and threads can be provided on the inner wall of the mounting through hole 521, so that the tensioning seat 52 can apply a force to the atomizing nozzle 51 by means of a threaded connection. In addition, the atomizing nozzle 51 can be tightly mounted in the mounting hole 521, and the friction between the inner wall of the mounting hole 521 and the atomizing nozzle 51 can be used to achieve the purpose of the tension seat 52 applying force to the atomizing nozzle 51. By providing the mounting hole 521 on the tension seat 52 and installing the atomizing nozzle 51 in the mounting hole 521, the relative fixation of the atomizing nozzle 51 and the tension seat 52 is achieved, making the fixation of the atomizing nozzle 51 more stable and convenient. At the same time, through the limiting effect of the mounting hole 521, after the atomizing nozzle 51 is installed inside the mounting hole 521, the installation position of the atomizing nozzle 51 can be made more accurate, thereby improving the atomization effect and accuracy.

[0044] In one embodiment, see Figure 3A first sealing ring 6 is provided between the atomizing nozzle 51 and the inner wall of the mounting through hole 521, and the first sealing ring 6 is provided around the atomizing nozzle 51. Specifically, the first sealing ring 6 refers to an annular component for preventing leakage of fluid or gas, and the material of the first sealing ring 6 is usually rubber, plastic or metal. By providing the first sealing ring 6 between the atomizing nozzle 51 and the inner wall of the mounting through hole 521, the sealing between the atomizing nozzle 51 and the inner wall of the mounting through hole 521 can be made better, and the atomizing nozzle 51 can be prevented from loosening after being installed inside the mounting through hole 521, thereby making the installation of the atomizing nozzle 51 in the mounting through hole 521 more stable and firm.

[0045] In one embodiment, see Figure 3 and Figure 5 A conical expansion surface 522 is provided at one end of the mounting hole 521 near the main body 1. The first sealing ring 6 is sleeved onto the exterior of the atomizer nozzle 51. After the atomizer nozzle 51 is installed, the first sealing ring 6 abuts against the conical expansion surface. Specifically, the conical expansion surface 522 is an inclined surface structure arranged at an angle to the axis of the mounting hole 521. The conical expansion surface 522 is arranged around the axis of the mounting hole 521. The diameter of the conical expansion surface 522 gradually increases from closer to the main body 1 to farther away from the main body 1. By providing a tightening conical surface 522 on the inner wall of the mounting through hole 521, the first sealing ring 6 is sleeved on the outside of the atomizing nozzle 51, and after the atomizing nozzle 51 is installed, the first sealing ring 6 abuts against the tightening conical surface. When the atomizing nozzle 51 is installed to the inside of the mounting through hole 521, the tightening conical surface 522 will gradually squeeze the first sealing ring 6, so that the atomizing nozzle 51 is installed more firmly in the mounting through hole 521.

[0046] In an alternative embodiment, see Figure 3 A second sealing ring 7 is provided between the atomizing nozzle 51 and the inner wall of the mounting hole 521. The second sealing ring 7 is spaced apart from the first sealing ring 6 along the axis of the atomizing nozzle 51. Specifically, the second sealing ring 7 is an annular component used to prevent fluid or gas leakage. The second sealing ring 7 is typically made of rubber, plastic, or metal. The provision of the second sealing ring 7 prevents the atomizing nozzle 51 from loosening after being installed in the mounting hole 521, thereby ensuring a more stable installation of the atomizing nozzle 51.

[0047] In one embodiment, see Figure 3 and Figure 4, an annular groove 511 is further provided on the circumference of the atomizing nozzle 51, and the annular groove 511 and the inner wall of the mounting through hole 521 are arranged to form a rectifying cavity 54, a first air vent 523 is provided on the tightening seat 52, and the first air vent 523 is used to connect the rectifying cavity 54 with the external air source, and a plurality of second air vents 512 are further provided on the atomizing nozzle 51, and the second air vents 512 are used to connect the rectifying cavity 54 with the atomizing channel 53, and the plurality of second air vents 512 are evenly distributed around the atomizing channel 53. Specifically, the annular groove 511 refers to a groove structure that is recessed on the outer wall of the atomizing nozzle 51 and arranged around the atomizing channel 53. After the atomizing nozzle 51 is installed in the mounting through hole 521, the annular groove 511 and the inner wall of the mounting through hole 521 are arranged to form a rectifying cavity 54 surrounding the atomizing channel 53. The first vent hole 523 is a hole structure provided on the tensioning seat 52 and open at both ends, while the second vent hole 512 is a hole structure provided on the atomizing nozzle 51 and open at both ends. An annular groove 511 is also provided around the atomizing nozzle 51, surrounding the atomizing channel 53. The annular groove 511 and the inner wall of the mounting hole 521 form a rectifying cavity 54. The tensioning seat 52 is provided with a first vent hole 523, which is used to connect the rectifying cavity 54 to an external air source. The atomizing nozzle 51 is also provided with a plurality of second vent holes 512, which are used to connect the rectifying cavity 54 to the atomizing channel 53. The plurality of second vent holes 512 are evenly distributed around the atomizing channel 53. During the spraying process, high-pressure gas can enter the rectifying cavity 54 through the first vent 523 for rectification. After filling the entire rectifying cavity 54, the gas enters the atomizing channel 53 through the plurality of second vents 512 to atomize the glue liquid sprayed from the glue discharge nozzle 2. Since the second vents 512 are evenly distributed around the atomizing channel 53, and the rectifying cavity 54 is also distributed around the atomizing channel 53, the gas entering the atomizing channel 53 can be kept uniform in all directions around the glue discharge nozzle 2, effectively rectifying and controlling the stability of the airflow at the outlet of the atomizing channel 53, thereby preventing the sprayed atomized glue liquid from being eccentric and not in a complete cone shape, thereby ensuring the uniformity of the atomization.

[0048] In one embodiment, see Figure 3The glue discharge nozzle 2 includes a nozzle body 21, a mounting portion 22, and a glue discharge channel 23 for allowing glue to pass through. The mounting portion 22 is arranged at one end of the nozzle body 21 facing the main body 1. The glue discharge channel 23 passes through the nozzle body 21 and the mounting portion 22. The nozzle body 21 is inserted into the accommodating channel 513. The first side of the mounting portion 22 abuts against the atomizing nozzle 51, and the second side of the mounting portion 22 abuts against the side of the main body 1 under the action of the atomizing nozzle 51. Specifically, the nozzle body 21 refers to a component with a certain length. The nozzle body 21 can be columnar, rod-shaped or block-shaped. The mounting portion 22 refers to a component with a certain volume. The mounting portion 22 can be block-shaped or plate-shaped. The mounting portion 22 and the nozzle body 21 can be an integral structure, or the mounting portion 22 and the nozzle body 21 can be a separate structure. The glue discharge channel 23 refers to a channel structure with a certain length. The glue discharge channel 23 passes through the nozzle body 21 and the mounting portion 22 at the same time and is open at both ends. When in use, the nozzle body 21 can be inserted into the accommodating channel 513, the first side of the mounting portion 22 abuts against the atomizing nozzle 51, and the second side of the mounting portion 22 abuts against the side of the main body 1 under the action of the atomizing nozzle 51. At this time, after the atomizing nozzle 51 is installed, the mounting portion 22 can be squeezed and pushed to press the glue discharge nozzle 2 onto the main body 1.

[0049] In an alternative embodiment, see Figure 3 A sealing groove is provided on the end surface of the glue discharge nozzle 2 facing the striker 3, and the sealing groove is arranged around the inlet of the glue discharge nozzle 2. The end of the striker 3 can also be provided with a spherical structure that adapts to the shape of the sealing groove. When the striker 3 is in the blocking position, the end of the striker 3 can abut within the sealing groove. The provision of the sealing groove can increase the contact area between the end of the striker 3 and the glue discharge nozzle 2, thereby improving the sealing performance when the striker 3 blocks the inlet of the glue discharge nozzle 2.

[0050] In one embodiment, see Figure 3An adjustment sleeve 8 is disposed between the glue nozzle 2 and the main body 1. The adjustment sleeve 8 is provided with an escape passage for the striker 3 and the glue liquid to pass through. The first end of the adjustment sleeve 8 is movably connected to the main body 1, and the second end extends away from the main body 1. The second side of the mounting portion 22 abuts the second end of the adjustment sleeve 8. Specifically, the adjustment sleeve 8 is a cylindrical component of a certain height. The adjustment sleeve 8 is provided with an escape passage for the striker 3 and the glue liquid to pass through. By movably connecting the first end of the adjustment sleeve 8 to the main body 1 and extending the second end away from the main body 1, the position of the second end of the adjustment sleeve 8 can be adjusted. The second side of the mounting portion 22 of the glue nozzle 2 abuts the second end of the adjustment sleeve 8. When the position of the second end of the adjustment sleeve 8 changes, the inlet position of the glue nozzle 2 also changes with the second end of the adjustment sleeve 8. This allows the inlet position of the glue nozzle 2 to be adjusted after long-term use. This prevents a gap between the end of the striker 3 and the glue nozzle inlet when the striker 3 is in the blocking position, which can cause glue leakage.

[0051] In an alternative embodiment, see Figure 3 A mounting hole is provided on the main body 1, the first end of the adjusting sleeve 8 is inserted into the mounting hole, and the outer wall of the adjusting sleeve 8 is threadedly connected to the inner wall of the mounting hole.

[0052] The above is merely a preferred embodiment of the present invention and only specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. A piezoelectric spray valve, characterized in that: include: The main body has a working cavity for communicating with the glue supply structure; A glue discharge nozzle is mounted on the main body and communicated with the working chamber; a striker, at least one end of which is located in the working chamber and has the freedom to move relative to the main body, the striker having a blocking position and an open position, wherein when the striker is in the blocking position, the end of the striker abuts and blocks the inlet of the glue discharge nozzle, and when the striker is in the open position, the end of the striker is away from the glue discharge nozzle and spaced apart from the inlet of the glue discharge nozzle; a piezoelectric drive assembly, wherein a driving end of the piezoelectric drive assembly is connected to the striker, and the piezoelectric drive assembly is used to drive the striker to move between the blocking position and the open position; The atomizing structure is arranged on the main body and is used for atomizing the glue liquid sprayed out by the glue discharge nozzle.

2. The piezoelectric spray valve according to claim 1, wherein: The piezoelectric drive component has a working state and a non-working state. When the piezoelectric drive component is in the non-working state, the striker is located in the blocking position under the action of the piezoelectric drive component. When the piezoelectric drive component is in the working state, it has a pulse mode and a continuous mode. In the pulse mode, the piezoelectric drive component is used to drive the striker to vibrate at high frequency between the blocking position and the open position. In the continuous mode, the piezoelectric drive component is used to drive the striker to be continuously in the open position.

3. The piezoelectric spray valve according to claim 1, wherein: The atomization structure includes an atomization nozzle, which is connected to the main body. The interior of the atomization nozzle has a accommodating channel with both ends open. The glue discharge nozzle is inserted into the accommodating channel. The outer wall of the glue discharge nozzle and the inner wall of the accommodating channel are spaced apart to form an atomization channel for gas to pass through. The atomization channel is used to communicate with an external high-pressure gas source to atomize the glue sprayed from the glue discharge nozzle through the high-pressure gas.

4. The piezoelectric spray valve according to claim 3, wherein: The main body is provided with a tensioning seat, which is detachably connected to the main body and is used to apply a force toward the main body to the atomizing nozzle so as to press and fix the atomizing nozzle to the main body.

5. The piezoelectric spray valve according to claim 4, wherein: The tension seat is provided with a mounting through hole, the atomizing nozzle is mounted in the mounting through hole, and the outer wall of the atomizing nozzle is connected to the inner wall of the mounting through hole, so that the tension seat applies a force to the atomizing nozzle toward the main body.

6. The piezoelectric spray valve according to claim 5, wherein: A first sealing ring is provided between the atomizing nozzle and the inner wall of the mounting through hole, and the first sealing ring is provided around the atomizing nozzle.

7. The piezoelectric spray valve according to claim 6, wherein: A tightening conical surface is provided at one end of the mounting through hole close to the main body. The first sealing ring is sleeved on the outside of the atomizing nozzle. After the atomizing nozzle is mounted, the first sealing ring abuts against the tightening conical surface.

8. The piezoelectric spray valve according to claim 5, wherein: An annular groove is further provided on the circumference of the atomizing nozzle, and the annular groove and the inner wall of the mounting through hole form a rectifying cavity. A first air vent is provided on the tightening seat, and the first air vent is used to connect the rectifying cavity with an external air source. A plurality of second air vents are also provided on the atomizing nozzle, and the second air vents are used to connect the rectifying cavity with the atomizing channel, and the plurality of second air vents are evenly distributed around the atomizing channel.

9. The piezoelectric spray valve according to claim 3, wherein: The glue discharge nozzle includes a nozzle body, a mounting portion, and a glue discharge channel for passing glue liquid. The mounting portion is arranged at one end of the nozzle body facing the main body, and the glue discharge channel passes through the nozzle body and the mounting portion. The nozzle body is inserted into the accommodating channel, and the first side of the mounting portion abuts against the atomizing nozzle, and the second side of the mounting portion abuts against the side of the main body under the action of the atomizing nozzle.

10. The piezoelectric spray valve according to claim 9, wherein: An adjustment sleeve is provided between the glue discharge nozzle and the main body, and an avoidance channel is provided on the adjustment sleeve for the passage of the striker and the glue liquid. The first end of the adjustment sleeve is movably connected to the main body, and the second end extends in a direction away from the main body. The second side of the mounting portion abuts against the second end of the adjustment sleeve.

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