Piezoelectric ceramic injection valve capable of preventing liquid from being attached to nozzle opening

Abstract

The utility model discloses a piezoelectric ceramic injection valve capable of preventing liquid from being attached to a nozzle opening, and relates to the technical field of piezoelectric ceramic injection valves. Comprising a piezoelectric ceramic injection valve body, the piezoelectric ceramic injection valve body is provided with a cleaning mechanism used for liquid at a nozzle opening, the cleaning mechanism comprises a dismounting assembly, the dismounting assembly comprises a fluid seat connected with the lower end of the piezoelectric ceramic injection valve body in an attached mode, and a positioning shell is fixed to the outer wall of the piezoelectric ceramic injection valve body; air is injected into the annular guide pipe through the micro air pump, then the annular guide pipe is in fixed circulation connection through the connecting pipe, the air is fed into the air channel and discharged through the air opening in the nozzle opening wall, air flow is generated on the inner wall of the nozzle opening wall, and liquid on the inner wall is discharged. Therefore, the liquid hanging phenomenon is prevented, the inner wall of the nozzle opening can be continuously cleaned through gas flow, and it is ensured that the injection valve always keeps an efficient working state.

Description

Technical Field

[0001] This utility model relates to the field of piezoelectric ceramic jet valve technology, specifically a piezoelectric ceramic jet valve for preventing liquid from adhering to the nozzle orifice. Background Technology

[0002] With the growing acceptance of the electronics, automotive, energy, and biopharmaceutical industries, non-contact piezoelectric injection valves have already replaced existing production equipment in some domestic and international companies, thereby improving production efficiency and quality. Their advantages, such as small piezoelectric structure, extremely high displacement resolution, fast response speed, low-voltage drive, and high output force, also ensure their dominant market position.

[0003] Reference patent (Publication No.: CN108722788A; Publication Date: 2018-11-02) discloses a piezoelectric ceramic jet dispensing valve, relating to the field of fluid control technology. It includes a base, connector, flexible hinge, piezoelectric ceramic, impact pin assembly, fluid channel, nozzle assembly, and barrel connector. The connector is mounted on the upper end face of the base. The piezoelectric ceramic, flexible hinge, and impact pin assembly are encapsulated within the accommodating space of the base. The impact pin assembly is mounted on the front end of the flexible hinge, and the piezoelectric ceramic is mounted on the flexible hinge and connected to the connector in an electrical circuit. The fluid channel is mounted on the lower end face of the base, and the barrel connector is mounted on the side of the right end of the fluid channel. In this embodiment, the high-frequency response performance and high rigidity of the piezoelectric ceramic enable high-frequency jet dispensing and ultra-micro dispensing. While achieving the same dispensing effect, the displacement of the upper and lower impact pins in this embodiment is much smaller than that of traditional pneumatic jet valves, reducing wear on the upper and lower impact pins and making the dispensing effect more stable.

[0004] Based on the aforementioned patent, in the traditional piezoelectric ceramic jet valve, during the jetting process, liquid tends to adhere to and accumulate on the nozzle orifice wall, easily forming a liquid residue phenomenon. This liquid residue not only hinders the normal jetting of the liquid but also leads to inaccurate jetting volume. Therefore, this utility model provides a piezoelectric ceramic jet valve with a nozzle orifice anti-liquid residue feature. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a piezoelectric ceramic jet valve for preventing liquid buildup at the nozzle orifice. This solves the problem that traditional piezoelectric ceramic jet valves are prone to liquid buildup during the jetting process due to the adhesion and accumulation of liquid on the nozzle orifice wall. This liquid buildup not only hinders the normal jetting of liquid but also leads to inaccurate jetting volume.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a piezoelectric ceramic jet valve for preventing liquid residue from adhering to the nozzle orifice, comprising a piezoelectric ceramic jet valve body, wherein the piezoelectric ceramic jet valve body is provided with a cleaning mechanism for liquid at the nozzle orifice, the cleaning mechanism comprising:

[0007] The disassembly assembly includes a fluid seat that is fitted to the lower end of the piezoelectric ceramic jet valve body, and a positioning shell is fixed to the outer wall of the piezoelectric ceramic jet valve body;

[0008] The anti-snag component includes a nozzle orifice wall inside the fluid seat, an air channel inside the nozzle orifice wall, an air port extending to the nozzle orifice wall, and a connecting pipe connected to the bottom of the fluid seat via an air blowing component.

[0009] Preferably, a locking rod is fixed to the outer wall of the fluid seat, the locking rod is engaged with the positioning housing, and a locking rod is fixed to the inner wall of the locking rod.

[0010] Preferably, a fixing rod is fixed to the inner wall of the positioning housing, and a threaded bolt is connected to the internal thread of the fixing rod.

[0011] Preferably, the fluid seat has a flow channel inside, the flow channel extends to the upper end of the fluid seat and a material cylinder interface is fixed thereon, and the other end of the flow channel is in flow connection with the nozzle orifice wall.

[0012] Preferably, the air inlets are evenly distributed along the interior of the air channel, and the air channel is provided in three sets along the interior of the nozzle wall.

[0013] Preferably, the air blowing assembly includes a miniature air pump fixedly connected inside the fluid seat, the output end of the miniature air pump is connected to an annular conduit, the connecting pipe is located at the upper end of the annular conduit, the connecting pipe is in a flow connection with the annular conduit, and the upper end of the connecting pipe is in a flow connection with the air channel.

[0014] Beneficial effects

[0015] This invention provides a piezoelectric ceramic injection valve for preventing liquid residue from adhering to the nozzle orifice. Compared with the prior art, it has the following advantages:

[0016] Firstly, the annular conduit of this invention injects gas through a micro air pump, and then the annular conduit is fixedly connected by a connecting pipe to deliver the gas into the interior of the air channel. The gas is then discharged through the air port inside the nozzle orifice, generating gas flow on the inner wall of the nozzle orifice and discharging the liquid on the inner wall, thereby preventing liquid buildup. Furthermore, the gas flow can continuously clean the inner wall of the nozzle orifice, ensuring that the injection valve always maintains a highly efficient working state.

[0017] Secondly, this utility model first threads the threaded bolt onto the fixing rod and then threads it onto the locking rod, thus achieving the combined installation of the fluid seat and the piezoelectric ceramic jet valve body. During disassembly, the threaded bolt is loosened to disassemble the fluid seat, facilitating the cleaning of the internal nozzle orifice wall. This allows users to easily access the nozzle orifice wall for necessary cleaning, preventing liquid buildup at the nozzle orifice, ensuring the normal operation and jetting effect of the jet valve, and simplifying the assembly and disassembly process. No complicated tools are required; it can be completed manually, reducing the difficulty and cost of maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the fluid seat connection structure of this utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the fluid seat structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the inner wall structure of the nozzle orifice of this utility model;

[0022] Figure 5 This is an enlarged structural diagram of point A in this utility model;

[0023] Figure 6 This is a schematic diagram of the main structure of the annular catheter of this utility model.

[0024] In the diagram: 1. Piezoelectric ceramic jet valve body; 2. Fluid seat; 201. Clamping rod; 202. Locking rod; 203. Positioning housing; 204. Fixing rod; 205. Threaded bolt; 3. Barrel interface; 301. Flow channel; 302. Nozzle port wall; 4. Air channel; 401. Air port; 5. Miniature air pump; 501. Annular guide tube; 502. Connecting pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 This utility model provides a technical solution: a piezoelectric ceramic jet valve for preventing liquid residue from adhering to the nozzle orifice, comprising a piezoelectric ceramic jet valve body 1, wherein the piezoelectric ceramic jet valve body 1 is provided with a cleaning mechanism for liquid at the nozzle orifice, the cleaning mechanism comprising:

[0027] The disassembly assembly includes a fluid seat 2 that is attached to the lower end of the piezoelectric ceramic jet valve body 1, and a positioning shell 203 that is fixed to the outer wall of the piezoelectric ceramic jet valve body 1.

[0028] The anti-snag component includes a nozzle port wall 302 inside the fluid seat 2, an air channel 4 inside the nozzle port wall 302, an air port 401 extending to the nozzle port wall 302, and a connecting pipe 502 connected to the bottom of the fluid seat 2 via an air blowing component.

[0029] In a preferred embodiment, a locking rod 201 is fixed to the outer wall of the fluid seat 2, and the locking rod 201 is engaged with the positioning housing 203. A locking rod 202 is fixed to the inner wall of the locking rod 201, and a fixing rod 204 is fixed to the inner wall of the positioning housing 203. A threaded bolt 205 is threaded into the fixing rod 204. The fluid seat 2 is inserted into the positioning housing 203 on the outer wall of the piezoelectric ceramic jet valve body 1 via the locking rod 201. Then, the locking rod 202 on the inner wall of the locking rod 201 approaches the fixing rod 204 on the inner wall of the positioning housing 203, thus engaging the threaded bolt 205. First, it is threaded onto the fixing rod 204 and then threaded onto the locking rod 202 to achieve the combined installation of the fluid seat 2 and the piezoelectric ceramic jet valve body 1. When disassembling, the threaded bolt 205 is loosened to disassemble the fluid seat 2, which facilitates the cleaning of the internal nozzle orifice wall 302. This allows the user to easily access the nozzle orifice wall 302 for necessary cleaning, prevents liquid from adhering to the nozzle orifice, ensures the normal operation and jetting effect of the jet valve, and simplifies the assembly and disassembly process. No complicated tools are required; it can be done manually, reducing the difficulty and cost of maintenance.

[0030] In a preferred embodiment, a flow channel 301 is provided inside the fluid seat 2. The flow channel 301 extends to the upper end of the fluid seat 2 and a material cylinder interface 3 is fixed thereon. The other end of the flow channel 301 is connected to the nozzle orifice wall 302. The material cylinder interface 3 is connected to the material and enters the interior of the nozzle orifice wall 302 through the flow channel 301.

[0031] In a preferred embodiment, air inlets 401 are evenly distributed along the interior of the air channel 4. The air channel 4 is provided with three sets along the interior of the nozzle orifice wall 302. The air blowing assembly includes a miniature air pump 5 fixedly connected inside the fluid seat 2. The output end of the miniature air pump 5 is connected to an annular conduit 501. A connecting pipe 502 is located at the upper end of the annular conduit 501 and is in a flow connection with the annular conduit 501. The upper end of the connecting pipe 502 is in a flow connection with the air channel 4. Gas is injected into the annular conduit 501 by the miniature air pump 5. Then, the annular conduit 501 is fixedly connected to the connecting pipe 502 to send the gas into the interior of the air channel 4. The gas is discharged through the air inlets 401 inside the nozzle orifice wall 302, generating gas flow on the inner wall of the nozzle orifice wall 302 and discharging the liquid on the inner wall, thereby preventing liquid buildup. The gas flow can continuously clean the inner wall of the nozzle orifice, ensuring that the injection valve always maintains a high-efficiency working state.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0033] During operation, when installing and disassembling the fluid seat 2, the threaded bolt 205 is first threaded onto the fixing rod 204 and then threaded onto the locking rod 202 to achieve the combined installation of the fluid seat 2 and the piezoelectric ceramic jet valve body 1. When disassembling, the threaded bolt 205 is loosened to disassemble the fluid seat 2, which facilitates the cleaning of the internal nozzle orifice wall 302. This allows users to easily access the nozzle orifice wall 302 for necessary cleaning, preventing liquid from adhering to the nozzle orifice, ensuring the normal operation and jetting effect of the jet valve, and simplifying the assembly and disassembly process. No complicated tools are required; it can be completed manually, reducing the difficulty and cost of maintenance.

[0034] Then, gas is injected into the annular conduit 501 by the micro air pump 5, and then the annular conduit 501 is fixedly connected to the connecting pipe 502 to send the gas into the interior of the air channel 4. The gas is discharged through the air port 401 inside the nozzle port wall 302, generating gas flow on the inner wall of the nozzle port wall 302 and discharging the liquid on the inner wall, thereby preventing the occurrence of liquid hanging.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piezoelectric ceramic jet valve with liquid hanging prevention at the nozzle opening, comprising a piezoelectric ceramic jet valve body (1), characterized in that: The piezoelectric ceramic jet valve body (1) is provided with a cleaning mechanism for the nozzle port liquid, and the cleaning mechanism comprises: The disassembly assembly comprises a fluid seat (2) attached to the lower end of the piezoelectric ceramic jet valve body (1), and an outer wall of the piezoelectric ceramic jet valve body (1) is fixed with a positioning shell (203); The anti-hanging assembly comprises a nozzle port wall (302) arranged inside the fluid seat (2), an air passage (4) is formed in the inside of the nozzle port wall (302), the air passage (4) extends to the nozzle port wall (302) and is provided with an air port (401), and the bottom of the fluid seat (2) is provided with a connecting pipe (502) connected by the air blowing assembly.

2. The piezoelectric ceramic jet valve according to claim 1, wherein: An outer wall of the fluid seat (2) is fixed with a clamping rod (201), the clamping rod (201) is in clamping connection with the positioning shell (203), and an inner wall of the clamping rod (201) is fixed with a locking rod (202).

3. The piezoelectric ceramic jet valve according to claim 1, wherein: An inner wall of the positioning shell (203) is fixed with a fixing rod (204), and the fixing rod (204) is internally screwed with a threaded bolt (205).

4. The piezoelectric ceramic jet valve according to claim 1, wherein: An inner wall of the fluid seat (2) is fixed with a fixing rod (204), and the fixing rod (204) is internally screwed with a threaded bolt (205).

5. The piezoelectric ceramic jet valve according to claim 1, wherein: An inner wall of the fluid seat (2) is fixed with a fixing rod (204), and the fixing rod (204) is internally screwed with a threaded bolt (205).

6. The piezoelectric ceramic jet valve according to claim 1, wherein: The air ports (401) are uniformly distributed along the inside of the air passage (4), and the air passage (4) is provided with three groups along the inside of the nozzle port wall (302). The air blowing assembly comprises a micro air pump (5) fixedly connected inside the fluid seat (2), an output end of the micro air pump (5) is connected with an annular conduit (501), the connecting pipe (502) is located at the upper end of the annular conduit (501), the connecting pipe (502) is in flow connection with the annular conduit (501), The upper end of the connecting pipe (502) is in flow connection with the air passage (4). The upper end of the connecting pipe (502) is in flow connection with the air passage (4).

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