Piezoelectric atomization injection valve

Abstract

The utility model relates to the technical field of injection valves, in particular to a piezoelectric atomization injection valve which comprises a mounting plate and a valve body fixedly connected with the mounting plate, an upper cover is arranged on the top of the valve body, and a signal line is connected to the upper cover. A piezoelectric ceramic assembly is arranged in the valve body, a valve body cover is arranged on the front side of the valve body, an air inlet pipe connector is arranged at the upper end of the valve body cover, and an air outlet pipe connector is arranged at the lower end of the valve body cover. The top of the valve body is further provided with an upper adjusting screw, the upper adjusting screw is arranged on one side of the upper cover, and the upper adjusting screw extends into the valve body and can be in contact connection with the piezoelectric ceramic assembly. A stainless steel liquid box is arranged at the bottom of the valve body, and an atomization sleeve assembly is connected to the lower portion of the stainless steel liquid box. According to the piezoelectric injection valve, the atomization sleeve assembly is installed on the piezoelectric injection valve, so that the injection valve not only can achieve the injection dispensing function, but also can achieve the atomization function, the dual-purpose effect of one valve is achieved, and the atomization effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection valve technical field especially relates to a piezoelectric atomization injection valve. BACKGROUND

[0002] Piezoelectric injection valve as high accuracy, trace, non - contact point gluing valve has been widely used in 3C electron, semiconductor production and manufacture, aerospace etc.

[0003] The piezoelectric injection valve in the existing needle stroke, needle action and the cooperation of the nozzle and the voltage control of the controller directly affect the dispensing precision and stability, that is, only injection dispensing can be realized, but atomization function cannot be realized, and its use is limited.

[0004] Therefore, it is necessary to design a piezoelectric atomization injection valve to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a piezoelectric atomization injection valve is proposed to solve the shortcomings in the prior art, which can realize both injection dispensing and atomization functions, realizes the effect of one valve for two purposes, and has good atomization effect and convenient disassembly and assembly.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] A piezoelectric atomization injection valve, comprising a mounting plate, a valve body fixedly connected with the mounting plate, an upper cover provided at the top of the valve body, and a signal line connected to the upper cover; a piezoelectric ceramic assembly is arranged in the valve body; a valve cover is arranged on the front side of the valve body; an air inlet pipe joint is arranged at the upper end of the valve cover; an air outlet pipe joint is arranged at the lower end of the valve cover;

[0008] An upper adjusting screw is further arranged at the top of the valve body, which is arranged on one side of the upper cover and extends into the valve body to be in contact with the piezoelectric ceramic assembly.

[0009] A stainless steel liquid box is arranged at the bottom of the valve body, and a atomization sleeve assembly is connected below the stainless steel liquid box.

[0010] By adopting the technical scheme, the atomizing sleeve assembly is installed on the piezoelectric injection valve, so that the injection valve can not only realize the injection dispensing function, but also realize the atomizing function, achieving the effect of one valve with two functions. The installation plate is convenient to disassemble, which facilitates the customer to quickly and conveniently install the piezoelectric atomizing injection valve. The piezoelectric ceramic assembly drive is adopted, so that the highest working frequency of the dispensing can reach more than 1000 Hz. The air inlet pipe joint and the air outlet pipe joint are connected with the air cooling structure, air cooling is realized, the valve body and the piezoelectric ceramic assembly are kept within a certain temperature range, so as to ensure that the injection valve works safely and reliably.

[0011] Preferably, the atomizing sleeve assembly comprises a connecting seat arranged below the stainless steel liquid box and an atomizing sleeve arranged below the connecting seat, the atomizing sleeve is fixedly connected with the connecting seat through an atomizing sleeve connecting nut; the atomizing sleeve has a hollow structure, and a nozzle vertically arranged in the atomizing sleeve has a hollow structure.

[0012] Preferably, the nozzle has a vertically arranged valve needle sleeved therein, a valve needle fixing block is sleeved on the valve needle, the upper end of the valve needle is connected with the piezoelectric ceramic assembly in the valve body through the stainless steel liquid box, a first flow guide channel is formed between the lower end of the valve needle and the upper end of the inner wall of the nozzle, a second flow guide channel is arranged at the lower end of the nozzle, a nozzle hole is arranged at the bottom of the nozzle, the first flow guide channel and the second flow guide channel are transitionally connected in an inverted conical structure, and the first flow guide channel, the second flow guide channel and the nozzle hole are sequentially communicated from top to bottom.

[0013] Preferably, the bottom of the valve needle has a circular shape, when the valve needle moves downward under the drive of the piezoelectric ceramic assembly, the bottom of the valve needle can be fitted with the inverted conical structure, so as to seal the second flow guide channel.

[0014] Preferably, one side of the atomizing sleeve is provided with a first atomizing air inlet pipe joint, the other side of the atomizing sleeve is provided with a second atomizing air inlet pipe joint, the first atomizing air inlet pipe joint and the second atomizing air inlet pipe joint are oppositely arranged, and the first atomizing air inlet pipe joint and the second atomizing air inlet pipe joint are both in communication with the airflow channel in the atomizing sleeve, the bottom of the atomizing sleeve is provided with an atomizing hole in an inverted conical structure, and the first atomizing air inlet pipe joint and the second atomizing air inlet pipe joint are both in communication with the atomizing hole through the airflow channel.

[0015] By adopting the technical scheme, the nozzle is arranged in the atomizing sleeve, and cooperates with the valve needle to realize the atomizing function of the valve body, and the atomizing effect is better and is not easy to splash. At the same time, it is convenient to disassemble and clean, and can be used for spraying operation in a small space, which is convenient to use.

[0016] Preferably, the stainless steel liquid box is provided with an inclined glue inlet channel, the outlet of the glue inlet channel is communicated with the first flow guide channel, and a glue inlet fixing screw is arranged at the inlet of the glue inlet channel.

[0017] By adopting the above technical scheme: the stainless steel liquid box adopts modular design, is convenient to disassemble and assemble, liquid in the flow channel is easy to clean, and the stainless steel liquid box is easy to replace.

[0018] Preferably, the valve needle and the stainless steel liquid box are respectively provided with a sealing gasket and a back-up ring, and the sealing gasket and the back-up ring are sequentially arranged below the valve needle fixing block.

[0019] By adopting the above technical scheme: the sealing gasket and the back-up ring are adopted here, and the sealing performance between the valve needle and the stainless steel liquid box is further improved.

[0020] Preferably, the upper adjusting screw is sleeved with an adjusting scale.

[0021] By adopting the above technical scheme: the upper adjusting screw is adopted here to adjust the elongation of the valve needle, perfect fitting of the nozzle and the valve needle is guaranteed, and the adjusting scale is adopted to facilitate adjustment and operation of workers.

[0022] The utility model has the following beneficial effects:

[0023] 1. The utility model discloses a piezoelectric injection valve is provided with atomization sleeve assembly, so that the injection valve can realize injection dispensing function, and also can realize atomization function, realizes the effect of one valve two uses.

[0024] 2. The utility model discloses a nozzle is arranged in the atomization sleeve, and the valve needle is cooperated to move, so that the valve body realizes atomization function, and the atomization effect is better, and is not easy to splash. At the same time, convenient to disassemble and assemble, easy to clean, can be carried out spraying operation in the narrow space, convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the whole structure schematic diagram of the utility model;

[0026] Figure 2 It is the back structure schematic diagram of the utility model;

[0027] Figure 3 It is the structure schematic diagram of the valve body in the utility model;

[0028] Figure 4 It is the structure schematic diagram of the valve body inside in the utility model;

[0029] Figure 5 It is Figure 4 The enlarged schematic diagram of A part in the utility model;

[0030] Figure 6It is the installation schematic view of the valve needle and the nozzle in the utility model.

[0031] Figure 7 It is the schematic view of the atomization sleeve in the utility model.

[0032] Figure 8 It is the schematic view of the nozzle in the utility model.

[0033] In the drawing: 1 mounting plate, 2 valve body, 3 upper cover, 4 signal line, 5 piezoelectric ceramic assembly, 6 valve body cover, 7 air inlet pipe joint, 8 air outlet pipe joint, 9 upper adjusting screw, 10 stainless steel liquid box, 11 connecting seat, 12 atomization sleeve, 13 atomization sleeve connecting nut, 14 valve needle, 15 valve needle fixing block, 16 first flow guide channel, 17 second flow guide channel, 18 nozzle hole, 19 first atomization air inlet pipe joint, 20 second atomization air inlet pipe joint, 21 air flow channel, 22 atomization hole, 23 glue inlet channel, 24 glue inlet clamping screw, 25 sealing gasket, 26 plug seal, 27 adjusting scale, 28 nozzle. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0035] Referring to Figures 1-8 A piezoelectric atomization injection valve, comprising a mounting plate 1, a valve body 2 fixedly connected with the mounting plate 1, the top of the valve body 2 being provided with an upper cover 3, the upper cover 3 being connected with a signal line 4, the valve body 2 being provided with a piezoelectric ceramic assembly 5, the front side of the valve body 2 being provided with a valve body cover 6, the upper end of the valve body cover 6 being provided with an air inlet pipe joint 7, and the lower end of the valve body cover 6 being provided with an air outlet pipe joint 8.

[0036] Referring to Figure 4 The top of the valve body 2 is also provided with an upper adjusting screw 9, the upper adjusting screw 9 being arranged on one side of the upper cover 3, the upper adjusting screw 9 extending into the valve body 2 and being capable of being in contact with the piezoelectric ceramic assembly 5.

[0037] The bottom of the valve body 2 is provided with a stainless steel liquid box 10, and the lower side of the stainless steel liquid box 10 is connected with an atomization sleeve assembly.

[0038] In this embodiment, by installing the atomizing sleeve assembly on the piezoelectric injection valve, the injection valve can not only realize the injection dispensing function, but also realize the atomizing function, realizing the effect of one valve for two purposes. Wherein, the installation plate 1 is convenient to disassemble, which is convenient for customers to quickly and conveniently install the piezoelectric atomizing injection valve. And the piezoelectric ceramic assembly 5 drive adopted here can make the highest working frequency of the dispensing reach more than 1000Hz. The air inlet pipe joint 7 and the air outlet pipe joint 8 are connected with the air cooling structure to realize air cooling, so that the valve body 2 and the piezoelectric ceramic assembly 5 are kept within a certain temperature range, thereby ensuring the safe and reliable operation of the injection valve.

[0039] Referring to Figure 5 , Specifically, the atomizing sleeve assembly comprises a connecting seat 11 arranged below the stainless steel liquid box 10, and an atomizing sleeve 12 arranged below the connecting seat 11, the atomizing sleeve 12 is fixedly connected with the connecting seat 11 through the atomizing sleeve connecting nut 13; the atomizing sleeve 12 is in a hollow structure, and a nozzle 28 vertically arranged in the atomizing sleeve 12, the nozzle 28 is in a hollow structure.

[0040] Referring to Figure 5 , Specifically, the nozzle 28 is sleeved with a vertically arranged valve needle 14, the valve needle 14 is sleeved with a valve needle fixing block 15, the upper end of the valve needle 14 penetrates the stainless steel liquid box 10 and is connected with the piezoelectric ceramic assembly 5 in the valve body 2, the lower end of the valve needle 14 and the upper end of the inner wall of the nozzle 28 form a first flow channel 16, the lower end of the nozzle 28 is provided with a second flow channel 17, the bottom of the nozzle 28 is provided with a nozzle hole 18, the first flow channel 16 and the second flow channel 17 are transitionally connected in an inverted conical structure, and the first flow channel 16, the second flow channel 17 and the nozzle hole 18 are sequentially communicated from top to bottom.

[0041] Specifically, the bottom of the valve needle 14 is circular, when the valve needle 14 moves downward under the drive of the piezoelectric ceramic assembly 5, the bottom of the valve needle 14 can be fitted with the inverted conical structure, so as to seal the second flow channel 17.

[0042] Referring to Figures 5-8 , Specifically, one side of the atomizing sleeve 12 is provided with a first atomizing air inlet pipe joint 19, the other side of the atomizing sleeve 12 is provided with a second atomizing air inlet pipe joint 20, the first atomizing air inlet pipe joint 19 and the second atomizing air inlet pipe joint 20 are oppositely arranged, and the first atomizing air inlet pipe joint 19 and the second atomizing air inlet pipe joint 20 are both communicated with the airflow channel 21 in the atomizing sleeve 12, the bottom of the atomizing sleeve 12 is provided with an atomizing hole 22 in an inverted conical structure, and the first atomizing air inlet pipe joint 19 and the second atomizing air inlet pipe joint 20 are both communicated with the atomizing hole 22 through the airflow channel 21.

[0043] In the embodiment, the nozzle 28 is arranged in the atomizing sleeve 12, and the valve body realizes the atomizing function by cooperating with the valve needle 14, so that the atomizing effect is better and splashing is less likely to occur. Meanwhile, the atomizing sleeve assembly is convenient to disassemble and clean, and can be used for spraying operation in a small space. In actual application, the first atomizing air inlet pipe joint 19 and the second atomizing air inlet pipe joint 20 are connected with the air source, and the size of the atomizing amount can be controlled by controlling the size of the air amount.

[0044] The bottom of the upper adjusting screw 9 touches the piezoelectric ceramic assembly 5 by rotating the upper adjusting screw 9, and the valve needle 14 is driven to move downward under the driving of the piezoelectric ceramic assembly 5, so that the valve needle 14 is combined with the inverted conical structure of the nozzle 28, and the nozzle 28 is closed. Conversely, when the upper adjusting screw 9 is rotated in the opposite direction, the nozzle 28 can be opened. The piezoelectric ceramic assembly 5 used here has no substantial difference in structure and working principle from the prior art, and therefore will not be described in detail here.

[0045] Referring to Figure 5 Specifically, the glue inlet channel 23 is arranged obliquely in the stainless steel liquid box 10, the outlet of the glue inlet channel 23 is communicated with the first flow guide channel 16, and the glue inlet channel 23 is provided with a glue inlet fixing screw 24 at the inlet.

[0046] In the embodiment, the stainless steel liquid box 10 adopts modular design, is convenient to disassemble and clean the liquid in the flow channel, and is easy to replace. The glue and other liquids enter the first flow guide channel 16, the second flow guide channel 17 and the nozzle hole 18 in sequence through the glue inlet channel 23, and the glue injection function of the injection valve is realized. In combination with the atomizing sleeve 12, the first atomizing air inlet pipe joint 19 and the second atomizing air inlet pipe joint 20, the atomizing function can be realized. In actual application, the valve body can be flexibly switched between the piezoelectric injection valve and the piezoelectric atomizing valve, and the atomizing sleeve assembly can be removed to realize the glue injection function. The valve body is convenient to disassemble and realize the effect of one valve with two functions.

[0047] Referring to Figure 5 Specifically, the valve needle 14 and the stainless steel liquid box 10 are respectively provided with a sealing gasket 25 and a packing seal 26, and the sealing gasket 25 and the packing seal 26 are arranged below the valve needle fixing block 15 in sequence.

[0048] In the embodiment, the sealing gasket 25 and the packing seal 26 are used here to further improve the sealing between the valve needle 14 and the stainless steel liquid box 10.

[0049] Referring to Figure 1 Specifically, the upper adjusting screw 9 is sleeved with an adjusting scale 27.

[0050] In this embodiment, an adjustable scale 27 is used to adjust the extension of the valve needle 14, thereby controlling the size of the flow channel between the nozzle 28 and the valve needle 14. The adjustable scale facilitates adjustment and operation by employees, making it convenient to use.

[0051] In summary, this invention, by installing an atomizing sleeve assembly on a piezoelectric spray valve, enables the valve to perform both spray dispensing and atomization functions, achieving a dual-purpose valve. By incorporating a nozzle within the atomizing sleeve, which works in conjunction with the valve needle, the valve body achieves atomization with improved atomization and reduced splattering. Furthermore, it is easy to assemble and disassemble, easy to clean, and can be used for spraying in confined spaces, making it convenient to operate.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A piezoelectric atomizing injection valve, comprising a mounting plate (1) and a valve body (2) fixedly connected to the mounting plate (1), characterized in that, The valve body (2) is provided with a top cover (3), and a signal line (4) is connected to the top cover (3); a piezoelectric ceramic component (5) is provided inside the valve body (2); a valve body cover (6) is provided on the front side of the valve body (2); an air inlet pipe connector (7) is provided at the upper end of the valve body cover (6); and an air outlet pipe connector (8) is provided at the lower end of the valve body cover (6). The valve body (2) is also provided with an upper adjusting screw (9) at the top. The upper adjusting screw (9) is located on one side of the upper cover (3). The upper adjusting screw (9) extends into the valve body (2) and can contact and connect with the piezoelectric ceramic assembly (5). The bottom of the valve body (2) is provided with a stainless steel liquid box (10), and an atomizing sleeve assembly is connected below the stainless steel liquid box (10).

2. The piezoelectric atomizing injection valve according to claim 1, characterized in that, The atomizing sleeve assembly includes a connecting seat (11) located below the stainless steel liquid box (10) and an atomizing sleeve (12) located below the connecting seat (11). The atomizing sleeve (12) is fixedly connected to the connecting seat (11) by an atomizing sleeve connecting nut (13). The atomizing sleeve (12) has a hollow structure, and a vertically arranged nozzle (28) is provided inside the atomizing sleeve (12). The nozzle (28) has a hollow structure.

3. The piezoelectric atomizing injection valve according to claim 2, characterized in that, The nozzle (28) is fitted with a vertically arranged valve needle (14), and a valve needle fixing block (15) is fitted on the valve needle (14). The upper end of the valve needle (14) passes through the stainless steel liquid box (10) and is connected to the piezoelectric ceramic component (5) in the valve body (2). A first flow channel (16) is formed between the lower end of the valve needle (14) and the upper end of the inner wall of the nozzle (28). A second flow channel (17) is provided at the lower end of the nozzle (28). A nozzle hole (18) is provided at the bottom of the nozzle (28). The first flow channel (16) and the second flow channel (17) are connected in an inverted conical structure. The first flow channel (16), the second flow channel (17) and the nozzle hole (18) are connected sequentially from top to bottom.

4. The piezoelectric atomizing injection valve according to claim 3, characterized in that, The bottom of the valve needle (14) is round. When the valve needle (14) moves downward under the drive of the piezoelectric ceramic assembly (5), the bottom of the valve needle (14) can fit into the inverted conical structure, thereby sealing the second flow channel (17).

5. A piezoelectric atomizing injection valve according to claim 2, characterized in that, The atomizing sleeve (12) has a first atomizing air inlet connector (19) on one side and a second atomizing air inlet connector (20) on the other side. The first atomizing air inlet connector (19) and the second atomizing air inlet connector (20) are arranged opposite to each other, and both the first atomizing air inlet connector (19) and the second atomizing air inlet connector (20) are connected to the airflow channel (21) inside the atomizing sleeve (12). The bottom of the atomizing sleeve (12) has an atomizing hole (22) with an inverted conical structure. Both the first atomizing air inlet connector (19) and the second atomizing air inlet connector (20) are connected to the atomizing hole (22) through the airflow channel (21).

6. A piezoelectric atomizing injection valve according to claim 3, characterized in that, The stainless steel liquid box (10) is provided with an inclined glue inlet channel (23), the outlet of the glue inlet channel (23) is connected to the first guide channel (16), and the inlet of the glue inlet channel (23) is provided with a glue inlet set screw (24).

7. A piezoelectric atomizing injection valve according to claim 6, characterized in that, A sealing gasket (25) and a plug seal (26) are respectively provided between the valve needle (14) and the stainless steel liquid box (10), and the sealing gasket (25) and the plug seal (26) are arranged below the valve needle fixing block (15) in sequence.

8. A piezoelectric atomizing injection valve according to claim 1, characterized in that, An adjustment scale (27) is fitted onto the upper adjusting screw (9).

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