A gas flow pump based on a piezoelectric system

Abstract

The present invention discloses a gas flow pump based on a piezoelectric system, which comprises an intake housing, a piezoelectric system assembly, a vibration membrane assembly, a sealing ring and an outlet housing. A positioning structure is provided between the vibration membrane assembly and the outlet housing. The intake housing is provided with a positioning and pressing structure. A second positioning structure and a sealing structure are provided between the sealing ring and the vibration membrane assembly. The upper vibration membrane is provided with a one-way flow structure and a positioning groove. By setting the sealing structure, the sealing performance of the mating connection of the parts of the vibration membrane assembly is ensured, so as to ensure the subsequent pressurization transmission performance and effect and the accuracy of gas transportation. By setting the one-way flow structure, the one-way movement during the input transportation is achieved, ensuring the one-way nature of gas transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of gas boosting and conveying control, and particularly relates to a gas flow pump based on a piezoelectric system. Background Art

[0002] In modern production and life, the development of gas compression, conveying, and flow regulation technologies has received significant attention. Currently, various types of pump body devices for high-purity gas boosting and gas flow control have emerged on the market to perform gas conveying control actions. However, the following problems generally exist in their application processes: The existing gas control pumps perform gas control and conveying actions by setting a diaphragm device and fitting it with the air inlet hole. However, this method will have a certain impact on gas flow control. Moreover, after long-term use, the diaphragm device will experience elastic weakening, resulting in a decrease in the fitting efficiency with the air inlet hole, a decrease in sealing performance, and air leakage, failing to achieve the purpose of precisely controlling gas flow. Additionally, it also leads to insufficient gas boosting effect and low air pressure, affecting the conveying; The existing gas control pumps use seals or glue coating between the valve bodies for sealing. However, the seal and glue coating methods are easily affected by the environment or usage intensity, resulting in a decrease in their sealing performance, affecting the sealing effect, and thus affecting the control accuracy and effect of the subsequent gas conveying volume; When assembling the components of the existing gas control pumps, due to the lack of a positioning structure, the assembly efficiency is affected, and it is prone to deviation during use, resulting in a decrease in the working stability of the gas control pump and affecting the subsequent use efficiency and accuracy. Summary of the Invention

[0003] The present invention aims at the deficiencies of the current technology and provides a gas flow pump based on a piezoelectric system.

[0004] The technical solution adopted by the present invention to achieve the above object is as follows:

[0005] A gas flow pump based on a piezoelectric system includes an intake housing, a piezoelectric system component, a vibration membrane component, and an outlet housing. The intake housing is provided with an intake structure, the outlet housing is provided with an outlet structure, a valve cavity is provided between the intake housing and the outlet housing, the vibration membrane component is arranged in the valve cavity, the piezoelectric system component is arranged above the vibration membrane component, a positioning structure is provided between the vibration membrane component and the outlet housing, and the intake housing is provided with a positioning and pressing structure;

[0006] The vibration film assembly is provided with a sealing ring. A second positioning structure and a sealing structure are provided between the sealing ring and the vibration film assembly. The vibration film assembly includes an upper vibration film and a lower vibration film. A sealing valve is provided between the upper vibration film and the lower vibration film. The sealing valve is provided with an air chamber. The lower vibration film is provided with an air outlet hole, and the air outlet hole is communicated with the air outlet structure. The upper vibration film is provided with a one-way flow structure and a positioning groove, and the piezoelectric system assembly is arranged on the positioning groove.

[0007] For further improvement, the air inlet structure is composed of a plurality of through holes, and the plurality of through holes are respectively arranged on the top surface and the side surface of the air inlet housing. One end of the through hole is connected and communicated with the outside, and the other end of the through hole is connected and communicated with the valve cavity.

[0008] For further improvement, the air outlet housing is provided with an annular protrusion, and the annular protrusion is provided with a first air chamber. The air outlet structure is arranged at the bottom of the air outlet housing. The air outlet structure includes an air outlet pipe, and the air outlet pipe is provided with a first through hole, and the first through hole is connected and communicated with the first air chamber.

[0009] For further improvement, the piezoelectric system assembly includes an electrode plate, a piezoelectric ceramic plate and a vibration plate. The positioning groove is arranged at the central position of the top surface of the upper vibration film. The vibration plate is arranged in the positioning groove. The piezoelectric ceramic plate is arranged on the vibration plate. The electrode plate is arranged on the sealing ring. The electrode plate includes a positive electrode plate and a negative electrode plate. The positive electrode plate and the negative electrode plate are both provided with a contact part and a connection part. The contact parts are both in contact with the piezoelectric ceramic plate to form an electrical connection, and the connection parts penetrate out through the connection parts to contact with the outside.

[0010] For further improvement, the positioning structure includes a positioning groove structure and a positioning block structure. The positioning groove structure includes a plurality of positioning grooves, and the positioning grooves are arranged on the inner side surface of the air outlet housing in an annular array. The positioning block structure includes a plurality of positioning blocks, and the positioning blocks are arranged on the outer side surface of the lower vibration film in an annular array.

[0011] For further improvement, the positioning and pressing structure includes a plurality of positioning pressing blocks. The positioning pressing blocks are arranged on the inner side surface of the bottom of the air inlet housing in an annular array, and the positioning pressing blocks are respectively in fit connection with the positioning grooves.

[0012] For further improvement, the second positioning structure includes a positioning column structure and a plurality of groups of positioning hole structures. The positioning column structure is arranged at the bottom of the sealing ring. The plurality of groups of positioning hole structures are respectively arranged on the upper vibration film, the lower vibration film and the sealing valve. The positioning column structure includes a plurality of positioning columns, and each group of the positioning hole structures includes a plurality of positioning holes. The positioning columns are respectively aligned and connected with the positioning holes one by one.

[0013] For further improvement, the sealing structure includes multiple annular protrusions and multiple annular grooves. The multiple annular protrusions are respectively arranged at the bottom of the sealing ring, the bottom of the upper vibration film, and the bottom of the sealing valve. The multiple annular grooves are respectively arranged on the upper surface of the upper vibration film, the upper surface of the sealing valve, and the upper surface of the lower vibration film. A sealing convex ring is further arranged on the bottom surface of the upper vibration film. The outer side surface of the sealing convex ring is provided with an inclined surface. The lower vibration film is further provided with a sealing groove. The inner side surface of the sealing valve and the sealing groove are both provided with a first inclined surface. The inclined surface is in fitting connection with the first inclined surface, and the bottom surface of the sealing convex ring is in fitting connection with the sealing groove.

[0014] For further improvement, the annular protrusion is further provided with a first sealing protrusion. The bottom of the lower vibration film is provided with a first sealing groove. The first sealing protrusion is in fitting connection with the first sealing groove. The one-way flow structure is an elastic one-way permeable membrane. The one-way flow structure includes multiple one-way permeable ventilation holes, and the air outlet of the one-way permeable ventilation hole faces the air chamber. The one-way permeable ventilation hole is used for the one-way movement of gas.

[0015] For further improvement, an air intake gap is provided between the outer side surface of the sealing ring and the inner side surface of the valve cavity. The air intake housing and the air outlet housing, the piezoelectric system assembly and the upper vibration film, the upper vibration film and the sealing ring, the upper vibration film and the sealing valve, the sealing valve and the lower vibration film, and the lower vibration film and the air outlet housing are all connected into one body by means of adhesive connection or welding.

[0016] The beneficial effects of the present invention: The present invention sets a positioning structure to ensure the installation position of the vibration film assembly and the valve cavity, improves the assembly efficiency, and combines with a positioning and pressing structure for pressing and fixing to prevent displacement during operation, ensuring the stability of the gas flow pump during operation; by setting a second positioning structure to provide positioning and alignment efficiency, improve the installation efficiency, and ensure the alignment of the position between the sealing ring and the vibration film assembly, ensuring the subsequent sealing effect and the stability of the working movement, preventing leakage caused by deviation, and ensuring the working stability of the gas flow pump based on the piezoelectric system and the accuracy of gas transportation; by setting a sealing structure to ensure the sealing performance of the fitting connection of each part of the vibration film assembly, thereby ensuring the subsequent pressurization transmission performance and effect, and ensuring the accuracy of gas transportation; by setting a one-way flow structure for the one-way movement during input and transportation, ensuring the one-way nature of gas transportation.

[0017] The following further illustrates the present invention in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the gas flow pump based on the piezoelectric system for this embodiment;

[0019] Figure 2 Front elevation schematic view of the gas flow pump based on the piezoelectric system of this embodiment;

[0020] Figure 3 is Figure 2 A - A sectional view schematic diagram of;

[0021] Figure 4 is Figure 3 Enlarged schematic diagram of A in;

[0022] Figure 5 Exploded schematic view of the gas flow pump based on the piezoelectric system of this embodiment;

[0023] Figure 6 Exploded schematic view of the sealing ring, upper vibration membrane and sealing valve of this embodiment;

[0024] Figure 7 Bottom schematic view of the intake housing of this embodiment;

[0025] Figure 8 Bottom schematic view of the lower vibration membrane of this embodiment. Detailed implementation manners

[0026] The following is only a preferred embodiment of the present invention and does not limit the protection scope of the present invention accordingly.

[0027] Embodiment, refer to the attached Figures 1 to 8 , A gas flow pump 1 based on a piezoelectric system includes an intake housing 2, a piezoelectric system assembly 3, a vibration membrane assembly 4 and an exhaust housing 5. The intake housing 2 is provided with an intake structure 6, the exhaust housing 5 is provided with an exhaust structure 7, a valve cavity 8 is provided between the intake housing 2 and the exhaust housing 5, the vibration membrane assembly 4 is arranged in the valve cavity 8, the piezoelectric system assembly 3 is arranged above the vibration membrane assembly 4, a positioning structure 9 is provided between the vibration membrane assembly 4 and the exhaust housing 5, and the intake housing 2 is provided with a positioning and pressing structure 10;

[0028] The vibration membrane assembly 4 is provided with a sealing ring 11, a positioning structure two 12 and a sealing structure 13 are provided between the sealing ring 11 and the vibration membrane assembly 4. The vibration membrane assembly 4 includes an upper vibration membrane 40 and a lower vibration membrane 41. A sealing valve 42 is provided between the upper vibration membrane 40 and the lower vibration membrane 41. The sealing valve 42 is provided with an air chamber 420. The lower vibration membrane 41 is provided with an air outlet hole 410, and the air outlet hole 410 is communicated with the exhaust structure 7. The upper vibration membrane 40 is provided with a one - way flow structure 400 and a positioning groove 401, and the piezoelectric system assembly 3 is arranged on the positioning groove 401.

[0029] The intake structure 6 is composed of a plurality of through holes, and the plurality of through holes are respectively arranged on the top surface and the side surface of the intake housing 2. One end of each through hole is connected and communicated with the outside, and the other end of each through hole is connected and communicated with the valve cavity 8.

[0030] The outlet housing 5 is provided with an annular protrusion 50. The annular protrusion 50 is provided with a first air chamber. The outlet structure 7 is arranged at the bottom of the outlet housing 5. The outlet structure 7 includes an outlet pipe. The outlet pipe is provided with a first through hole, and the first through hole is connected and communicated with the first air chamber.

[0031] The piezoelectric system assembly 3 includes an electrode plate 30, a piezoelectric ceramic plate 31 and a vibrating plate 32. The positioning groove 401 is arranged at the center position of the top surface of the upper vibrating film 40. The vibrating plate 32 is arranged in the positioning groove 401. The piezoelectric ceramic plate 31 is arranged on the vibrating plate 32. The electrode plate 30 is arranged on the sealing ring 11. The electrode plate 30 includes a positive electrode plate and a negative electrode plate. The positive electrode plate and the negative electrode plate are both provided with a contact portion 300 and a connecting portion 301. The contact portions 300 are both in contact with the piezoelectric ceramic plate 31 to form an electrical connection, and the connecting portions 301 pass through the connecting portions to contact the outside.

[0032] The positioning structure 9 includes a positioning groove structure 90 and a positioning block structure 91. The positioning groove structure 90 includes a plurality of positioning grooves, and the positioning grooves are arranged on the inner side surface of the outlet housing 5 in an annular array. The positioning block structure 91 includes a plurality of positioning blocks, and the positioning blocks are arranged on the outer side surface of the lower vibrating film 41 in an annular array. The positioning and pressing structure 10 includes a plurality of positioning pressing blocks. The positioning pressing blocks are arranged on the inner side surface of the bottom of the intake housing 2 in an annular array, and the positioning pressing blocks are respectively in mating connection with the positioning grooves. The positioning structure 9 is used to ensure the installation position of the vibrating film assembly 4 and the valve cavity 8, improve the assembly efficiency, and the positioning and pressing structure 10 is used for pressing and fixing to prevent displacement during operation and ensure the stability of operation.

[0033] The second positioning structure 12 includes a positioning post structure 120 and multiple groups of positioning hole structures 121. The positioning post structure 120 is arranged at the bottom of the sealing ring 11. Multiple positioning hole structures 121 are respectively arranged on the upper vibration film 40, the lower vibration film 41 and the sealing valve 42. The positioning post structure 120 includes multiple positioning posts. Multiple groups of positioning hole structures 121 each include multiple positioning holes. The positioning posts are respectively aligned and connected with the positioning holes one by one. The second positioning structure 12 is used to provide positioning and alignment efficiency, improve the installation efficiency, and ensure the correct alignment of the position between the sealing ring 11 and the vibration film assembly 4, ensure the subsequent sealing effect and the working movement stability, prevent the occurrence of air leakage caused by deviation, and ensure the working stability of the gas flow pump 1 based on the piezoelectric system and the accuracy of gas transmission.

[0034] The sealing structure 13 includes multiple annular protrusions 130 and multiple annular grooves 131. Multiple annular protrusions 130 are respectively arranged at the bottom of the sealing ring 11, the bottom of the upper vibration film 40 and the bottom of the sealing valve 42. Multiple annular grooves 131 are respectively arranged on the upper surface of the upper vibration film 40, the upper surface of the sealing valve 42 and the upper surface of the lower vibration film 41. A sealing convex ring 403 is further arranged on the bottom surface of the upper vibration film 40. The outer side surface of the sealing convex ring 403 is provided with an inclined surface. The lower vibration film 41 is further provided with a sealing groove 410. The inner side surface of the sealing valve 11 and the sealing groove 410 are both provided with an inclined surface one. The inclined surface is in fit connection with the inclined surface one. The bottom surface of the sealing convex ring 403 is in fit connection with the sealing groove 410. The sealing structure 13 is used to ensure the sealing performance of the fit connection of each part of the vibration film assembly 4, so as to ensure the subsequent pressurization transmission performance and effect, and ensure the accuracy of gas transmission.

[0035] The annular protrusion 50 is further provided with a sealing protrusion one 500. The bottom of the lower vibration film 42 is provided with a sealing groove one 423. The sealing protrusion one 500 is in fit connection with the sealing groove one 423. The one-way flow structure 400 is an elastic one-way permeable membrane. The one-way permeable membrane includes multiple one-way permeable air holes, and the air outlet of the one-way permeable air hole faces the air chamber 420. The one-way permeable air hole is used for the one-way movement of gas. The one-way flow structure 400 is used for the one-way movement during the input and transportation of gas, and ensures the one-way property of gas transmission.

[0036] An air intake gap is provided between the outer side surface of the sealing ring 11 and the inner side surface of the valve cavity 8. The air intake gap is used to allow the gas remaining below the air outlet housing 5 to enter the air chamber 420 through the upper vibration membrane 40, and can cooperate with the air intake structure 6 to improve the air intake efficiency and the gas transportation efficiency. The sealing ring 11 is used to improve the sealing performance. The air intake housing 2 and the air outlet housing 5, the piezoelectric system component 3 and the upper vibration membrane 40, the upper vibration membrane 40 and the sealing ring 11, the upper vibration membrane and the sealing valve 11, the sealing valve 11 and the lower vibration membrane 41, and the lower vibration membrane 41 and the air outlet housing 5 are all connected into one body by means of adhesive bonding or welding.

[0037] The working principle of the present invention: During operation, the piezoelectric system component 3 vibrates under the excitation of an electrical signal and drives the vibration piece to perform a longitudinal movement. When the piezoelectric system component 3 moves towards the air intake housing 2, it drives the upper vibration membrane to expand, the air chamber space becomes larger, the pressure becomes smaller, and the gas flows into the air chamber of the air chamber sealing valve along the one-way flow structure of the air intake housing 2 - the piezoelectric system component 3 - the upper vibration membrane. When the piezoelectric system component 3 moves towards the air outlet housing 5, it drives the upper vibration membrane to compress, the air chamber space becomes smaller, the pressure increases, and the gas pressurization process is completed. The gas is transmitted along the air outlet structure 7 of the lower vibration membrane to achieve the effect of gas pressurization and transmission.

[0038] The present invention provides a positioning structure to ensure the installation position of the vibration membrane assembly and the valve cavity, improve the assembly efficiency, and combines a positioning and pressing structure for pressing and fixing to prevent displacement during operation and ensure the stability of the gas flow pump. By providing a second positioning structure to improve the positioning and alignment efficiency and the installation efficiency, and ensure the alignment between the sealing ring and the vibration membrane assembly, the subsequent sealing effect and the working movement stability are ensured, and the situation of air leakage caused by deviation is prevented, ensuring the working stability of the gas flow pump based on the piezoelectric system and the accuracy of gas transportation. By providing a sealing structure to ensure the sealing performance of the mating connection of the various parts of the vibration membrane assembly, thereby ensuring the subsequent pressurization and transmission performance and effect, and ensuring the accuracy of gas transportation. By providing a one-way flow structure to achieve a one-way movement during the input and transportation of the gas, ensuring the one-way nature of gas transportation.

[0039] The present invention is not limited to the above embodiments. Other gas flow pumps based on the piezoelectric system obtained by adopting the same or similar structures or devices as those in the above embodiments of the present invention are all within the protection scope of the present invention.

Claims

1. A gas flow pump based on a piezoelectric system, characterized in that: The gas flow pump includes an intake housing, a piezoelectric system assembly, a vibration membrane assembly, and an outlet housing. The intake housing is provided with an intake structure, the outlet housing is provided with an outlet structure, a valve chamber is provided between the intake housing and the outlet housing, the vibration membrane assembly is arranged in the valve chamber, the piezoelectric system assembly is arranged above the vibration membrane assembly, a positioning structure is provided between the vibration membrane assembly and the outlet housing, and the intake housing is provided with a positioning and pressing structure; The vibration membrane assembly is provided with a sealing ring. A second positioning structure and a sealing structure are provided between the sealing ring and the vibration membrane assembly. The vibration membrane assembly includes an upper vibration membrane and a lower vibration membrane. A sealing valve is provided between the upper vibration membrane and the lower vibration membrane. The sealing valve is provided with an air chamber. The lower vibration membrane is provided with an air outlet hole, and the air outlet hole is communicated with the outlet structure. The upper vibration membrane is provided with a one-way flow structure and a positioning groove, and the piezoelectric system assembly is arranged on the positioning groove; The intake structure is composed of a plurality of through holes. The plurality of through holes are respectively arranged on the top surface and the side surface of the intake housing. One end of the through hole is connected and communicated with the outside, and the other end of the through hole is connected and communicated with the valve chamber; The piezoelectric system assembly includes an electrode plate, a piezoelectric ceramic plate, and a vibration plate. The positioning groove is arranged at the center position of the top surface of the upper vibration membrane. The vibration plate is arranged in the positioning groove. The piezoelectric ceramic plate is arranged on the vibration plate. The electrode plate is arranged on the sealing ring. The electrode plate includes a positive electrode plate and a negative electrode plate. The positive electrode plate and the negative electrode plate are both provided with a contact part and a connecting part. The contact parts are both in contact with the piezoelectric ceramic plate to form an electrical connection, and the connecting parts penetrate out to contact the outside; An intake gap is provided between the outer side surface of the sealing ring and the inner side surface of the valve chamber. The intake housing and the outlet housing, the piezoelectric system assembly and the upper vibration membrane, the upper vibration membrane and the sealing ring, the upper vibration membrane and the sealing valve, the sealing valve and the lower vibration membrane, and the lower vibration membrane and the outlet housing are all connected into one body by means of adhesive connection or welding.

2. The gas flow pump based on a piezoelectric system according to claim 1, characterized in that: The outlet housing is provided with an annular protrusion. The annular protrusion is provided with a first air chamber. The outlet structure is arranged at the bottom of the outlet housing. The outlet structure includes an outlet pipe. The outlet pipe is provided with a first through hole, and the first through hole is connected and communicated with the first air chamber.

3. The gas flow pump based on a piezoelectric system according to claim 1, wherein: The positioning structure includes a positioning groove structure and a positioning block structure. The positioning groove structure includes a plurality of positioning grooves, and the positioning grooves are arranged on the inner side surface of the outlet housing in an annular array. The positioning block structure includes a plurality of positioning blocks, and the positioning blocks are arranged on the outer side surface of the lower vibration membrane in an annular array.

4. The gas flow pump based on a piezoelectric system according to claim 3, wherein: The positioning and pressing structure includes a plurality of positioning pressing blocks. The positioning pressing blocks are arranged on the inner side surface of the bottom of the intake housing in an annular array, and the positioning pressing blocks are respectively in fit connection with the positioning grooves.

5. The gas flow pump based on a piezoelectric system according to claim 4, characterized in that: The second positioning structure includes a positioning post structure and multiple groups of positioning hole structures. The positioning post structure is arranged at the bottom of the sealing ring, and multiple groups of positioning hole structures are respectively arranged on the upper vibration film, the lower vibration film and the sealing valve. The positioning post structure includes multiple positioning posts, and multiple groups of positioning hole structures each include multiple positioning holes. The positioning posts are respectively aligned and connected with the positioning holes one by one.

6. The gas flow pump based on a piezoelectric system according to claim 5, characterized in that: The sealing structure includes multiple annular protrusions and multiple annular grooves. The multiple annular protrusions are respectively arranged at the bottom of the sealing ring, the bottom of the upper vibration film and the bottom of the sealing valve. The multiple annular grooves are respectively arranged on the upper surface of the upper vibration film, the upper surface of the sealing valve and the upper surface of the lower vibration film. A sealing convex ring is further arranged on the bottom surface of the upper vibration film. The outer side surface of the sealing convex ring is chamfered. The lower vibration film is further provided with a sealing groove. The inner side surface of the sealing valve and the sealing groove are both chamfered with a first chamfer. The chamfer is in fit connection with the first chamfer, and the bottom surface of the sealing convex ring is in fit connection with the sealing groove.

7. The gas flow pump based on a piezoelectric system according to claim 6, characterized in that: The annular protrusion is further provided with a first sealing protrusion. The bottom of the lower vibration film is provided with a first sealing groove. The first sealing protrusion is in fit connection with the first sealing groove. The one-way flow structure is an elastic one-way permeable membrane. The one-way flow structure includes multiple one-way permeable ventilation holes, and the air outlet of the one-way permeable ventilation hole faces the air chamber. The one-way permeable ventilation hole is used for the one-way movement of gas.

Images