Piezoelectric valve

Abstract

The utility model relates to the technical field of fluid flow control devices, and provides a piezoelectric valve which comprises a valve body, a first channel and a second channel, the first channel and the second channel are communicated with a cavity, and the first channel and the second channel penetrate through the side wall of the valve body. One end of the piezoelectric plate is rotationally connected to the side wall of the cavity, the other end of the piezoelectric plate is connected with a sealing gasket, and the sealing gasket is provided with a first position and a second position in the cavity. Compared with the prior art, the piezoelectric valve has the advantages that the piezoelectric plate is installed in the cavity, one end of the piezoelectric plate is fixed in the cavity in a rotating mode, the piezoelectric plate is powered on only when fluid flow needs to be adjusted, and therefore energy consumption of the piezoelectric valve is reduced; when the first channel and the second channel are closed, noise generated when the piezoelectric valve works is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid flow control devices, in particular to a piezoelectric valve. Background Art

[0002] A solenoid-type flow control valve is a device that uses electromagnetic force to control the opening and closing of a valve. It is typically used to regulate the flow or pressure of fluids (such as liquids or gases). This type of valve is widely used in industrial automation systems in industries such as chemicals, petroleum, pharmaceuticals, and food processing. However, solenoid-type flow control valves have some significant disadvantages, such as high noise levels during operation and the need for continuous power to maintain operation, which results in high energy consumption. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a piezoelectric valve in view of the current status of the existing technology.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows: a piezoelectric valve is provided, comprising: a valve body, wherein the valve body has a cavity and a first channel and a second channel both communicating with the cavity, wherein the first channel and the second channel both pass through the side wall of the valve body;

[0005] a piezoelectric piece, one end of which is rotatably connected to the side wall of the cavity, and the other end of which is connected to a sealing gasket, wherein the sealing gasket has a first position and a second position in the cavity;

[0006] The sealing gasket can be located at the first position when the piezoelectric piece is in the power-off state to isolate the first channel from the second channel, and can be located at the second position when the piezoelectric piece is in the power-on state to allow the first channel to communicate with the second channel.

[0007] In the above-mentioned piezoelectric valve, the end of the bracket abuts against the piezoelectric piece, a hinge seat is connected to the cavity, one end of the piezoelectric piece is connected to a hinge, and the hinge is rotatably connected to the hinge seat through a hinge shaft, so as to construct a lever system between the end of the bracket, the hinge, the hinge seat and the piezoelectric piece.

[0008] In the above-mentioned piezoelectric valve, a nozzle is constructed between the first channel and the cavity, and the sealing gasket movably abuts against the nozzle.

[0009] In the above-mentioned piezoelectric valve, a spring is connected to the cavity, and the spring is installed at one end of the piezoelectric piece connected to the sealing gasket. The sealing gasket located at the second position can be switched to the first position under the action of the spring after the piezoelectric piece is powered off.

[0010] In the above-mentioned piezoelectric valve, the valve body includes a detachably connected upper cover and a shell, the cavity is formed between the upper cover and the shell, and the axial direction of the hinge shaft is perpendicular to the direction of the upper cover pointing to the shell.

[0011] Compared with the existing technology, the advantage of the present invention is that by installing a piezoelectric piece in the cavity and fixing one end of the piezoelectric piece in the cavity in a rotatable manner, the piezoelectric piece is energized with different voltages only when the fluid flow needs to be adjusted, thereby changing the opening between the first channel and the second channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a partial cross-sectional view of a piezoelectric valve of the utility model;

[0013] In the figure, 1. hinge seat; 2. hinge; 3. piezoelectric sheet; 4. bracket; 5. upper cover; 6. spring; 7. sealing gasket; 8. nozzle; 9. shell; 101. first channel; 102. second channel; 201. hinge axis. DETAILED DESCRIPTION

[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0015] like Figure 1 As shown, a piezoelectric valve of the present invention includes: a valve body, a cavity and a first channel 101 and a second channel 102 both connected to the cavity are constructed inside the valve body, and the first channel 101 and the second channel 102 both pass through the side wall of the valve body; a piezoelectric piece 3, one end of which is rotatably connected to the side wall of the cavity, and the other end is connected to a sealing gasket 7, and the sealing gasket 7 has a first position and a second position in the cavity; the sealing gasket 7 can be located in the first position when the piezoelectric piece 3 is in a power-off state, for isolating the first channel 101 and the second channel 102, and can be located in the second position when the piezoelectric piece 3 is in a power-on state, for communicating the first channel 101 with the second channel 102.

[0016] The piezoelectric sheet 3 is a component that utilizes the piezoelectric effect. This effect occurs when an electric field is applied across a material, causing the material to deform, thereby converting electrical energy into mechanical energy. The piezoelectric sheet 3 is typically a thin sheet made of a piezoelectric material. Common piezoelectric materials include quartz, barium titanate (BaTiO3), and lead zirconate titanate (PZT). These materials have a unique crystal structure that enables them to exhibit the piezoelectric effect.

[0017] In the initial state, the piezoelectric piece 3 is in the power-off state, and the sealing gasket 7 is in the first position (eg Figure 1As shown in FIG5 , the sealing gasket 7 blocks the flow of fluid between the first channel 101 and the second channel 102. When the piezoelectric piece 3 is energized, the piezoelectric piece 3 bends, and the end to which the sealing gasket 7 is connected is bent relative to the rotation center of the piezoelectric piece 3. Figure 1 The counterclockwise rotation of the piezoelectric element drives the sealing gasket 7 to switch from the first position to the second position, thereby connecting the first channel 101 with the second channel 102. The fluid can flow along the direction of the first channel 101-cavity-second channel 102 or the second channel 102-cavity-first channel 101. When the piezoelectric element 3 is powered off again, the piezoelectric element 3 returns to its original position and drives the sealing gasket 7 back to the first position, once again blocking the connection between the first channel 101 and the second channel 102.

[0018] In this solution, a piezoelectric piece 3 is installed in the cavity, and one end of the piezoelectric piece 3 is fixed in the cavity in a rotatable manner. The piezoelectric piece 3 is energized only when the fluid flow needs to be adjusted, thereby reducing the energy consumption of the piezoelectric valve. Moreover, when the piezoelectric piece 3 is energized with different voltages, the bending degree of the piezoelectric piece 3 is different, and the opening between the first channel 101 and the second channel 102 is also different, thereby achieving the effect of controlling the fluid flow.

[0019] A bracket 4 is constructed in the cavity, the end of the bracket 4 abuts against the piezoelectric piece 3, a hinge seat 1 is connected in the cavity, one end of the piezoelectric piece 3 is connected to a hinge 2, and the hinge 2 is rotatably connected to the hinge seat 1 through a hinge shaft 201, and is used to construct a lever system between the end of the bracket 4, the hinge 2, the hinge seat 1 and the piezoelectric piece 3.

[0020] When the fluid pressure in the cavity is high, the deformation of the piezoelectric disc 3 alone may not be sufficient to drive the position switching of the sealing gasket 7. To this end, in this solution, a bracket 4 is provided in the cavity, which contacts the piezoelectric disc 3. This forms a lever structure in the cavity, thereby amplifying the thrust of the end of the piezoelectric disc 3 where the sealing gasket 7 is provided, allowing the piezoelectric valve to adapt to the flow control of higher pressure fluids. Without the hinge and seat structure, the bracket 4 and piezoelectric disc 3 alone will not form a lever effect.

[0021] A nozzle 8 is constructed between the first channel 101 and the cavity, and the sealing gasket 7 is movably abutted against the nozzle 8. The function of the nozzle 8 is to reduce the connection width between the first channel 101 and the cavity, so that the piezoelectric valve can still effectively isolate the first channel 101 and the second channel 102 when using a smaller sealing gasket 7 and when the sealing gasket 7 is in the first position.

[0022] A spring 6 is connected to the cavity and is installed at one end of the piezoelectric piece 3 connected to a sealing gasket 7. The sealing gasket 7 located in the second position can be switched to the first position under the action of the spring 6 after the piezoelectric piece 3 is powered off.

[0023] like Figure 1 As shown, at this time, the sealing gasket 7 is in the first position, one end of the spring 6 is pressed against the side wall of the cavity, and the other end is pressed against the piezoelectric piece 3, and at this time the spring 6 is in a compressed state, pressing the sealing gasket 7 in the first position, blocking the connection between the first channel 101 and the second channel 102. After the piezoelectric piece 3 is energized, the elastic force of the spring 6 is overcome to drive the sealing gasket 7 to switch to the second position, so that the first channel 101 and the second channel 102 are connected.

[0024] The valve body includes an upper cover 5 and a shell 9 that are detachably connected. A cavity is formed between the upper cover 5 and the shell 9 , and the axis direction of the hinge shaft 201 is perpendicular to the direction of the upper cover 5 pointing to the shell 9 .

[0025] The detachable connection between the upper cover 5 and the shell 9 facilitates the installation of the piezoelectric sheet 3, the hinge seat 1 and the hinge 2 in the cavity. The axial direction of the hinge shaft 201 is perpendicular to the direction of the upper cover 5 pointing to the shell 9, which is used to facilitate the installation of the hinge shaft 201 on the hinge seat 1.

[0026] After the piezoelectric piece 3 is energized, one end thereof is lifted toward the upper cover 5, compressing the spring 6 and switching the sealing gasket 7 to the second position; after the piezoelectric piece 3 is de-energized, the compression spring 6 restores the piezoelectric piece 3 to its initial state, switching the sealing gasket 7 to the first position.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them with similar methods, without departing from the scope defined by the spirit of the present invention.

Claims

1. A piezoelectric valve, characterized in that: include: A valve body, wherein the valve body is internally configured with a cavity and a first channel and a second channel both communicating with the cavity, wherein the first channel and the second channel both penetrate through a side wall of the valve body; a piezoelectric piece, one end of which is rotatably connected to the side wall of the cavity, and the other end of which is connected to a sealing gasket, wherein the sealing gasket has a first position and a second position in the cavity; The sealing gasket can be located at the first position when the piezoelectric piece is in the power-off state to isolate the first channel from the second channel, and can be located at the second position when the piezoelectric piece is in the power-on state to allow the first channel to communicate with the second channel.

2. A piezoelectric valve according to claim 1, characterized in that: A bracket is constructed in the cavity, the end of the bracket abuts the piezoelectric piece, a hinge seat is connected to the cavity, one end of the piezoelectric piece is connected to a hinge, and the hinge is rotatably connected to the hinge seat through a hinge shaft, so as to construct a lever system between the end of the bracket, the hinge, the hinge seat and the piezoelectric piece.

3. A piezoelectric valve according to claim 1, characterized in that: A nozzle is configured between the first channel and the cavity, and the sealing gasket movably abuts against the nozzle.

4. A piezoelectric valve according to claim 1, characterized in that: A spring is connected to the cavity and is installed at one end of the piezoelectric piece connected to the sealing gasket. The sealing gasket located at the second position can be switched to the first position under the action of the spring after the piezoelectric piece is powered off.

5. A piezoelectric valve according to claim 2, characterized in that: The valve body includes an upper cover and a shell that are detachably connected. The cavity is formed between the upper cover and the shell. The axis direction of the hinge shaft is perpendicular to the direction in which the upper cover points to the shell.

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