Piezoelectric spray valve

Abstract

The invention 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 invention belongs to the technical field of spraying, and in particular relates to a piezoelectric spray valve. Background Art

[0002] The spray valve is a device for spraying glue, which is used for spraying low-viscosity glue such as paint, silicone, UV glue, etc., and is widely used in the fields of machine manufacturing, semiconductors, PCB (Printed Circuit Board) manufacturing and SMT (Surface Mount Technology) manufacturing, such as mobile phone shell appearance spraying, flux spraying and surface coating, etc. However, most existing spray valves have the problem of slow switch control response speed when in use. Summary of the invention

[0003] The object of the present invention 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 present invention is implemented by providing a piezoelectric spray valve, comprising:

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

[0006] A glue discharge nozzle is installed 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, when the striker is located in the blocking position, the end of the striker abuts against and blocks the entrance of the glue discharge nozzle, when the striker is located in the open position, the end of the striker is away from the glue discharge nozzle and is spaced apart from the entrance of the glue discharge nozzle;

[0008] A piezoelectric drive assembly, wherein a drive 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 opening position;

[0009] The atomizing structure is arranged on the main body and is used for atomizing the glue liquid sprayed from the glue outlet 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 a 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 tension seat is provided on the main body, the tension seat is detachably connected to the main body, and the tension seat is used to apply a force toward the main body to the atomizer nozzle to press and fix the atomizer nozzle to the main body.

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

[0014] In an optional embodiment, a first sealing ring is arranged between the atomizing nozzle and the inner wall of the mounting through hole, and the first sealing ring is arranged 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 arranged to form a rectifying cavity, a first air vent is provided on the tensioning 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 further 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 runs through the nozzle body and the mounting portion, the nozzle body is inserted in 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 the adjustment sleeve is provided with an avoidance channel for the firing pin and the glue liquid to pass through. 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 technical effect of the present invention relative to the prior art is as follows: a working chamber for communicating with the glue supply structure is provided on the main body, so that the glue liquid can enter the working chamber under the action of the glue supply structure. At the same time, a glue discharge nozzle connected to the working chamber is also installed on the main body, so that the glue liquid can be sprayed out from the outlet of the glue discharge nozzle, and can be atomized by the atomization structure after being sprayed out. In addition, by arranging at least one end of the striker in the working chamber, the striker can move between the blocking position and the open position under the action of the piezoelectric drive component. When the striker is in the blocking position, the end of the striker abuts and blocks the entrance of the glue discharge nozzle to block the entrance of the glue discharge nozzle. When the striker is in the open position, the end of the striker is away from the glue discharge nozzle and is spaced from the entrance of the glue discharge nozzle, so that the entrance of the glue discharge nozzle can be connected to the working chamber. Compared with the pneumatic drive mode used in the spray valve in the prior art, by relying on the characteristics of the fast driving speed and rapid state change of the piezoelectric drive component, the piezoelectric drive component is used to drive the striker to move between the blocking position and the open position, which can improve the response speed of the valve body switch 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 movement of the striker, and then adjusting the gap between the end of the striker and the entrance of the glue discharge nozzle when the striker is in the open position, and finally adjusting the glue discharge amount of the glue discharge nozzle, 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 drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. 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 creative work.

[0021] Figure 1is a schematic diagram of the structure of a piezoelectric spray valve provided by an embodiment of the present invention;

[0022] Figure 2 is a partial structural schematic diagram of a piezoelectric spray valve provided in an embodiment of the present invention;

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

[0024] Figure 4 Schematic diagram of the structure of the atomizing nozzle used in the embodiment of the present invention;

[0025] Figure 5 It is a schematic structural diagram of the tension seat used in the embodiment of the present invention.

[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 air vent; 513. Accommodating channel; 52. Tensioning seat; 521. Mounting through hole; 522. Tensioning conical surface; 523. First air vent; 53. Atomization channel; 54. Rectification chamber; 6. First sealing ring; 7. Second sealing ring; 8. Adjusting sleeve; 9. Glue supply structure. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, 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 be used 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 drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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, and the piezoelectric spray valve includes a main body 1, a glue discharge 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 discharge nozzle 2 is mounted on the main body 1 and is connected to the working chamber 11. At least one end of the striker 3 is located in the working chamber 11 and has the freedom to move relative to the main body 1. The striker 3 has a blocking position and an open position. When the striker 3 is in the blocking position, the end of the striker 3 abuts and blocks the entrance 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 from the entrance of the glue discharge 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 blocking position and the open position. The atomizing structure 5 is arranged on the main body 1, and the atomizing structure 5 is used to atomize the glue sprayed at the outlet of the glue discharge nozzle 2.

[0034] Specifically, the main body 1 refers to a component with a certain volume, and the main body 1 can be block-shaped, block-shaped, columnar or a combination of multiple shapes. The working chamber 11 refers to a cavity structure with a certain accommodating 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 from an opening of the working chamber 11 into 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 uses the piezoelectric effect and the reverse piezoelectric effect of piezoelectric materials to realize the mutual conversion between electrical energy and mechanical energy. The piezoelectric material refers to a material that can generate voltage under the action of an external force, or generate mechanical strain by applying a voltage. The piezoelectric drive assembly 4 may include a piezoelectric component composed of a plurality of components made of piezoelectric materials stacked together and a driving lever. The middle area of ​​the driving lever is hingedly arranged on the fixed component, and the piezoelectric component is connected between the first end of the driving lever and the fixed component. The height of the entire piezoelectric component can be changed by changing the voltage applied to the piezoelectric component, 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 refers to 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 realize the atomization of liquid by ultrasonic waves, high-speed vibration, etc.

[0037] The piezoelectric spray valve provided in the embodiment of the present invention 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 can be atomized by the atomization structure 5 after being sprayed out. In addition, by setting at least one end of the striker 3 in the working chamber 11, the striker 3 can move between the blocking position and the 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 entrance of the glue discharge nozzle 2 to block the entrance 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 from the entrance of the glue discharge nozzle 2, so that the entrance of the glue discharge nozzle 2 can be connected to the working chamber 11. Compared with the pneumatic driving method used in the prior art of the spray valve, the piezoelectric driving component 4 is used to drive the striker 3 to move between the blocking position and the open position by relying on the characteristics of the piezoelectric driving component 4 with fast driving speed and rapid state change, so as to improve the response speed of the valve body switch control. At the same time, the voltage applied to the piezoelectric driving component 4 can be changed to change the movement amplitude of the driving end, thereby adjusting the amplitude of the movement of the striker 3, and then adjusting the gap between the end of the striker 3 and the inlet of the glue discharge nozzle 2 when the striker 3 is in the open position, and finally adjusting the glue discharge amount of the glue discharge nozzle 2, 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 2, the 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 a 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, the piezoelectric drive assembly 4 is in a working state, which can be a state in which a certain voltage is applied to the piezoelectric component of the piezoelectric drive assembly 4, and the size of the piezoelectric component will change accordingly according to the applied voltage. The piezoelectric drive assembly 4 is in a non-working state, which can refer to a state in which no voltage is applied to the piezoelectric component. In addition, the pulse mode in the working state can be achieved by changing the direction of the voltage applied to the piezoelectric component at a high frequency to achieve a rapid change in the size of the piezoelectric component itself, thereby achieving high-frequency vibration of the driving end of the piezoelectric drive assembly 4. The continuous mode refers to applying a voltage of a constant direction to the piezoelectric component of the piezoelectric drive assembly 4, so as to achieve the purpose of the firing pin 3 being continuously in the open position. When the piezoelectric spray valve is working, the piezoelectric drive assembly 4 can have a pulse mode and a continuous mode. In the pulse mode, the piezoelectric drive assembly 4 drives the firing pin 3 to vibrate at a high frequency between the blocking position and the open position, so as to achieve the pulsed quantitative spraying of the glue by the glue nozzle, which is generally suitable for scenes with high requirements for glue quantity accuracy. In the continuous mode, the piezoelectric drive assembly 4 drives the firing pin 3 away from the inlet of the glue outlet nozzle 2, so that the glue can be continuously sprayed, which is generally suitable for scenes with low requirements for glue quantity accuracy.

[0040] In one embodiment, see Figure 3 and Figure 4The atomization structure 5 includes an atomization nozzle 51, which is connected to the main body 1. The interior of the atomization 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 atomization channel 53 for gas to pass through. The atomization 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 atomization nozzle 51 refers to a columnar component having a receiving channel 513 with both ends open inside. The receiving channel 513 of the atomization nozzle 51 is usually arranged along its own axial direction, and the receiving channel 513 and the atomization nozzle 51 are generally arranged coaxially, so that the wall thickness of the atomization nozzle 51 can be kept uniform at all locations. After the glue discharge 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 discharge nozzle 2. The outlet of the glue discharge nozzle 2 can slightly protrude from the second end of the accommodating channel 513, or the outlet of the glue discharge nozzle 2 can also be arranged flush with the second end of the yielding channel. By sleeved the atomizing nozzle 51 on the outside of the glue discharge nozzle 2, the inner wall of the accommodating channel 513 and the outer wall of the glue discharge nozzle 2 are spaced apart from each other to form an atomizing channel 53 surrounding the glue discharge nozzle 2, and the atomizing channel 53 is used for communication with an external high-pressure gas source, and high-pressure gas can be introduced into the atomizing channel 53 while the glue discharge 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 of the atomizing channel 53 can be evenly distributed around the glue discharge nozzle 2, thereby ensuring that the glue liquid sprayed out of the glue discharge nozzle 2 is in a uniform cone 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 tension seat 52, which is detachably connected to the main body 1. The tension seat 52 is used to apply a force toward the main body 1 to the atomizing nozzle 51, so as to press and fix the atomizing nozzle 51 to the main body 1. Specifically, the tension seat 52 refers to a component with a certain volume, and the tension seat 52 can be a block, a strip or a plate, and the tension seat 52 can also be a combination of multiple shapes. Among them, the tension seat 52 can be detachably connected to the main body 1 by fastener connection or clamping. By detachably connecting the tension seat 52 from the main body 1, the tension seat 52 contacts the atomizer nozzle 51 after installation, and applies a force toward the main body 1 to the atomizer nozzle 51 to press and fix the atomizer nozzle 51 on the side of the main body 1, the atomizer nozzle 51 can be fixed more firmly. At the same time, the tension seat 52 is detachably connected to the main body 1, and the tension seat 52 can be conveniently removed when the atomizer nozzle 51 needs to be replaced, and then the atomizer nozzle 51 can also be removed, making the replacement of the atomizer nozzle 51 more convenient and quick, thereby improving the convenience of maintenance of the atomizer 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. During installation, 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 as a tapered way 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 threaded connection. In addition, the atomizing nozzle 51 can be installed in a tight fit in the installation through hole 521, and the tension seat 52 can exert a force on the atomizing nozzle 51 through the friction between the inner wall of the installation through hole 521 and the atomizing nozzle 51. The relative fixation of the atomizing nozzle 51 and the tension seat 52 can be achieved by providing the installation through hole 521 on the tension seat 52 and installing the atomizing nozzle 51 in the installation through hole 521, so that the fixation of the atomizing nozzle 51 is more stable and convenient. At the same time, through the limiting effect of the installation through hole 521, after the atomizing nozzle 51 is installed inside the installation through 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, so that the installation of the atomizing nozzle 51 in the mounting through hole 521 is more stable and firm.

[0045] In one embodiment, see Figure 3 and Figure 5 , a tightening conical surface 522 is provided at one end of the installation through hole 521 close to the main body 1, and 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. Specifically, the tightening conical surface 522 refers to an inclined surface structure arranged at an angle with the axis of the installation through hole 521, and the tightening conical surface 522 is arranged around the axis of the installation through hole 521. And the diameter of the tightening conical surface 522 gradually increases from close to the main body 1 to far 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 atomizer nozzle 51, and after the atomizer nozzle 51 is installed, the first sealing ring 6 abuts against the tightening conical surface. When the atomizer nozzle 51 is installed inside the mounting through hole 521, the tightening conical surface 522 gradually squeezes the first sealing ring 6, so that the atomizer 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 through hole 521, and the second sealing ring 7 and the first sealing ring 6 are spaced apart in the axial direction of the atomizing nozzle 51. Specifically, the second sealing ring 7 refers to an annular component for preventing fluid or gas leakage, and the material of the second sealing ring 7 is usually rubber, plastic or metal. By providing the second sealing ring 7, the atomizing nozzle 51 can be prevented from loosening after being installed inside the mounting through hole 521, so that the atomizing nozzle 51 can be installed more stably.

[0047] In one embodiment, see Figure 3 and Figure 4, an annular groove 511 is also 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 vent hole 523 is provided on the tensioning seat 52, and the first vent hole 523 is used to connect the rectifying cavity 54 with the external air source, and a plurality of second vent holes 512 are also provided on the atomizing nozzle 51, and the second vent holes 512 are used to connect the rectifying cavity 54 with the atomizing channel 53, and the plurality of second vent holes 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 refers to a hole structure provided on the tension seat 52 and open at both ends, and the second vent hole 512 refers to a hole structure provided on the atomizing nozzle 51 and open at both ends. An annular groove 511 surrounding the atomizing channel 53 is also 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 formed into a rectifying cavity 54. The tension seat 52 is provided with a first vent hole 523, and the first vent hole 523 is used to connect the rectifying cavity 54 with an external air source. The atomizing nozzle 51 is also provided with a plurality of second vent holes 512, and the second vent holes 512 are used to connect the rectifying cavity 54 with the atomizing channel 53, and the plurality of second vent holes 512 are evenly distributed around the atomizing channel 53. During the spraying process, the high-pressure gas can enter the rectifying cavity 54 through the first vent hole 523 for rectification, and after filling the entire rectifying cavity 54, enter the atomizing channel 53 through the plurality of second vent holes 512 to atomize the glue liquid sprayed from the glue discharge nozzle 2. Since the second vent holes 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, and the stability of the airflow at the outlet of the atomizing channel 53 can be effectively rectified and controlled, thereby avoiding the occurrence of eccentricity and incomplete cone-shaped atomized glue liquid sprayed, thereby ensuring the uniformity of 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 the glue liquid 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 runs 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, and the nozzle body 21 can be columnar, rod-shaped or block-shaped. The mounting portion 22 refers to a component with a certain volume, and the mounting portion 22 can be block-shaped or plate-shaped, etc. 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 split structure. The glue discharge channel 23 refers to a channel structure with a certain length, and the glue discharge channel 23 runs 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 blocking groove is provided on the end surface of the glue discharge nozzle 2 facing the striker 3, and the blocking groove is provided around the entrance of the glue discharge nozzle 2. The end of the striker 3 may also be provided with a spherical structure adapted to the shape of the blocking groove. When the striker 3 is in the blocking position, the end of the striker 3 may be abutted against the blocking groove. The setting of the blocking groove may increase the contact area between the end of the striker 3 and the glue discharge nozzle 2, so that the sealing performance is better when the striker 3 blocks the entrance of the glue discharge nozzle 2 again.

[0050] In one embodiment, see Figure 3, an adjustment sleeve 8 is arranged between the glue discharge nozzle 2 and the main body 1, and an escape passage for the striker 3 and the glue liquid to pass through is arranged on the adjustment sleeve 8, the first end of the adjustment sleeve 8 is movably connected to the main body 1, the second end extends in a direction away from the main body 1, and the second side of the mounting portion 22 abuts against the second end of the adjustment sleeve 8. Specifically, the adjustment sleeve 8 refers to a columnar component with a certain height, and an escape passage for the striker 3 and the glue liquid to pass through is arranged on the adjustment sleeve 8. By movably connecting the first end of the adjustment sleeve 8 to the main body 1 and extending the second end in a direction 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 discharge nozzle 2 abuts against the second end of the adjustment sleeve 8, and when the position of the second end of the adjustment sleeve 8 changes, the inlet position of the glue discharge nozzle 2 can also change with the second end of the adjustment sleeve 8, so that the inlet position of the glue discharge nozzle 2 can be adjusted to seal the edge after long-term use, so as to avoid the gap between the end of the striker 3 and the inlet of the glue nozzle when the striker 3 is in the blocking position, thereby causing 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 are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A piezoelectric spray valve, characterized in that: include: A main body having a working cavity for communicating with the glue supply structure; A glue discharge nozzle is installed 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, when the striker is located in the blocking position, the end of the striker abuts against and blocks the entrance of the glue discharge nozzle, when the striker is located in the open position, the end of the striker is away from the glue discharge nozzle and is spaced apart from the entrance of the glue discharge nozzle; A piezoelectric drive assembly, wherein a drive 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 opening position; The atomizing structure is arranged on the main body and is used for atomizing the glue liquid sprayed from the glue outlet nozzle.

2. The piezoelectric spray valve according to claim 1, characterized in that: 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 a 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, characterized in that: 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 two 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, characterized in that: The main body is provided with a tension seat, which is detachably connected to the main body and used to apply a force to the atomizing nozzle toward the main body so as to press and fix the atomizing nozzle to the main body.

5. The piezoelectric spray valve according to claim 4, characterized in that: 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 toward the main body to the atomizing nozzle.

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

7. The piezoelectric spray valve according to claim 6, characterized in that: A tightening conical surface is arranged at one end of the installation 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.

8. The piezoelectric spray valve according to claim 5, characterized in that: An annular groove is also provided on the circumference of the atomizing nozzle, and the annular groove and the inner wall of the mounting through hole are arranged to form a rectifying cavity. A first air vent is provided on the tensioning 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, characterized in that: 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 runs through the nozzle body and the mounting portion, the nozzle body is inserted in 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.

10. The piezoelectric spray valve according to claim 9, characterized in that: An adjustment sleeve is arranged between the glue discharge nozzle and the main body, and an avoidance channel for the striker and the glue liquid to pass through is arranged on the adjustment sleeve. 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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