Piezoelectric pressure sensor

Abstract

The utility model relates to the field of pressure sensor equipment, in particular to a piezoelectric pressure sensor. The piezoelectric pressure sensor comprises a shell, a pressing rod is slidably connected to the inner wall of the shell, a base is fixedly connected to the lower end of the pressing rod, a body is installed on the upper side of the base, grooves are formed in the two sides of the body, inclined plates are rotatably connected to the inner walls of the grooves, and first springs are jointly and fixedly connected to the upper sides of the inclined plates and the inner walls of the grooves of the body. A worker only needs to press the pressing rod, the clamping effect of the shell on the body can be relieved, and therefore the body can be conveniently and rapidly pulled out. Afterwards, a new body is pressed forcibly and inserted into the shell, replacement can be completed, the replacement efficiency is remarkably improved, the production interruption time caused by maintenance or replacement is shortened, and the overall efficiency of a production line is improved.

Description

Technical Field

[0001] The utility model relates to the field of pressure sensor equipment, in particular to a piezoelectric pressure sensor. Background Art

[0002] A sensor is a device or apparatus that can sense the measured change information and convert the change information into the required form of output signal according to certain rules. Among the sensors, pressure sensor is the most common one. Pressure sensors mainly include: resistive pressure sensors, capacitive pressure sensors and piezoelectric pressure sensors. Among them, piezoelectric pressure sensors have attracted widespread attention for their fast response speed, high sensitivity and ability to measure high-frequency change forces. They are used in piezoelectric acceleration sensors for safety performance such as automobile airbags, anti-lock braking systems and traction control systems, piezoelectric DNA sensors for biomedical measurements, new scanning force microscopes and many other fields. The working principle of piezoelectric pressure sensors is mainly based on the piezoelectric effect of piezoelectric materials. Multiferroic materials have multiple properties such as ferroelectricity, piezoelectricity, ferromagnetism, and ferroelasticity. They can be used as piezoelectric materials in piezoelectric pressure sensors, which has become one of the research hotspots for technicians in the field.

[0003] The Chinese patent number CN214621545U discloses a piezoelectric pressure sensor technology field, and discloses a piezoelectric pressure sensor for automatic target reporting, including a body, an active cavity is provided inside the body, two springs are fixedly installed in the active cavity, the tops of the two springs are fixedly connected to an outer cover that penetrates and extends to the top of the body, a sealing ring located in the active cavity and fitted with the body is fixedly installed on the outside of the outer cover, a fixing seat is fixedly installed on the top of the outer cover, a connector is fixedly installed on the top of the body, and a sealing gasket is fixedly installed on the top of the fixing seat. In the piezoelectric pressure sensor for automatic target reporting, the sealing protrusion improves the sealing effect, and the expansion and contraction of the spring ensures that the fitting effect can be maintained even in the state of thermal expansion and contraction. The fixing buckle facilitates the fixing of the fixing rope and the fixing buckle during rotation and tightening, avoiding the sealing protrusion and the carrier from fitting and affecting the tightening installation.

[0004] In the prior art, the piezoelectric pressure sensor is basically arranged by fixing it on a wall or the ground through a fixing plate, and an integrated structure is mostly adopted between the piezoelectric pressure sensor and the fixing plate. When the sensor is integrated with the mounting plate, if the sensor fails or needs to be replaced, the difficulty and cost of maintenance may increase due to the difficulty in disassembly.

[0005] In view of this, we propose a piezoelectric pressure sensor. Utility Model Content

[0006] The purpose of the utility model is to solve the above shortcomings and provide a piezoelectric pressure sensor that can be quickly replaced;

[0007] To achieve the above object, the utility model provides a piezoelectric pressure sensor, comprising a housing, a pressure rod is slidably connected to the inner wall of the housing, a base is fixedly connected to the lower end of the pressure rod, a body is installed on the upper side of the base, grooves are opened on both sides of the body, and an inclined plate is rotatably connected to the inner wall of the groove, and a first spring is fixedly connected to the upper side of the inclined plate and the inner wall of the groove of the body;

[0008] The lower side of the base and the bottom wall of the shell are fixedly connected with a fourth spring, the inner wall of the shell is fixedly connected with a slide rail, the inner wall of the slide rail is slidably connected with a slider, the inner wall of the shell is rotatably connected with a clamping plate, the lower side of the clamping plate and the upper end of the slider are fixedly connected with a third spring, and the lower end of the slider and the lower end of the pressure rod are fixedly connected with a linkage rod.

[0009] As a further improvement of the present technical solution, the inner wall of the shell is fixedly connected to a limit rod, the outer wall of the limit rod is slidably connected to a clamping plate, the side of the clamping plate opposite to the inner wall of the shell is fixedly connected to a second spring together with the inner wall of the shell, and the upper end of the side wall of the pressure rod is rotatably connected to a rotating rod together with the side of the clamping plate close to the main body.

[0010] As a further improvement of the technical solution, the number of the clamping plates, the inclined plates and the clamping plates are two each, and they are respectively arranged on both sides of the body.

[0011] As a further improvement of the technical solution, the initial state of the first spring is a compressed state.

[0012] As a further improvement of the technical solution, anti-slip patterns are evenly distributed on the inner wall of the splint.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In this piezoelectric pressure sensor, the worker only needs to press the pressure rod to release the clamping effect of the shell on the body, so that the body can be easily and quickly removed. Then, the new body can be pressed hard and inserted into the shell to complete the replacement, which significantly improves the replacement efficiency, helps to reduce the production interruption time caused by maintenance or replacement, and thus improves the overall efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0016] Figure 2 This is a first cross-sectional structural schematic diagram of Embodiment 1 of the present utility model;

[0017] Figure 3 This is a second cross-sectional structural schematic diagram of Embodiment 1 of the present utility model;

[0018] Figure 4 For the utility model embodiment 1 Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 5 For the utility model embodiment 1 Figure 2 The enlarged structural diagram at B in the middle;

[0020] Figure 6 For the utility model embodiment 1 Figure 3 Enlarged structural diagram at point C in the middle.

[0021] The meaning of each number in the figure is:

[0022] 100, housing; 101, body; 102, first spring; 103, inclined plate;

[0023] 200, pressure rod; 201, rotating rod; 202, limiting rod; 203, second spring; 204, clamping plate; 205, linkage rod; 206, slide rail; 207, third spring; 208, clamping plate; 209, base; 210, fourth spring; 211, slider. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A sensor is a device or apparatus that can sense the measured change information and convert the change information into the required form of output signal according to certain rules. Among the sensors, pressure sensor is the most common one. Pressure sensors mainly include: resistive pressure sensors, capacitive pressure sensors and piezoelectric pressure sensors. Among them, piezoelectric pressure sensors have attracted widespread attention for their fast response speed, high sensitivity and ability to measure high-frequency change forces. They are used in piezoelectric acceleration sensors for safety performance such as automobile airbags, anti-lock braking systems and traction control systems, piezoelectric DNA sensors for biomedical measurements, new scanning force microscopes and many other fields. The working principle of piezoelectric pressure sensors is mainly based on the piezoelectric effect of piezoelectric materials. Multiferroic materials have multiple properties such as ferroelectricity, piezoelectricity, ferromagnetism, and ferroelasticity. They can be used as piezoelectric materials in piezoelectric pressure sensors, which has become one of the research hotspots for technicians in the field.

[0026] The Chinese patent number CN214621545U discloses a piezoelectric pressure sensor technology field, and discloses a piezoelectric pressure sensor for automatic target reporting, including a body, an active cavity is provided inside the body, two springs are fixedly installed in the active cavity, the tops of the two springs are fixedly connected to an outer cover that penetrates and extends to the top of the body, a sealing ring located in the active cavity and fitted with the body is fixedly installed on the outside of the outer cover, a fixing seat is fixedly installed on the top of the outer cover, a connector is fixedly installed on the top of the body, and a sealing gasket is fixedly installed on the top of the fixing seat. In the piezoelectric pressure sensor for automatic target reporting, the sealing protrusion improves the sealing effect, and the expansion and contraction of the spring ensures that the fitting effect can be maintained even in the state of thermal expansion and contraction. The fixing buckle facilitates the fixing of the fixing rope and the fixing buckle during rotation and tightening, avoiding the sealing protrusion and the carrier from fitting and affecting the tightening installation.

[0027] In the prior art, the piezoelectric pressure sensor is basically arranged by fixing it on a wall or the ground through a fixing plate, and an integrated structure is mostly adopted between the piezoelectric pressure sensor and the fixing plate. When the sensor is integrated with the mounting plate, if the sensor fails or needs to be replaced, the difficulty and cost of maintenance may increase due to the difficulty in disassembly.

[0028] See also Figure 1 - Figure 6 As shown, this embodiment provides a piezoelectric pressure sensor, including a housing 100, the housing 100 is used to install a body 101, the inner wall of the housing 100 is slidably connected to a pressure rod 200, and the pressure rod 200 serves as a driving component so that a worker presses the pressure rod 200 (such as Figure 3 The body 101 is separated from the housing 100 by the downward arrow direction. The lower end of the pressure rod 200 is fixedly connected to a base 209. The base 209 is used as a device for specifically installing the body 101. The body 101 is installed on the upper side of the base 209. Grooves are provided on both sides of the body 101, and the inner wall of the groove is rotatably connected to an inclined plate 103. The inclined plate 103 is used to be clamped with the clamping plate 208. The upper side of the inclined plate 103 and the inner wall of the groove of the body 101 are fixedly connected to a first spring 102. The initial state of the first spring 102 is a compressed state (such as Figure 4 The first spring 102 pushes the inclined plate 103 because it is in a compressed state, so that the thrust of the first spring 102 on the lower side of the inclined plate 103 enters the groove, and when the thrust disappears, the first spring 102 pushes the inclined plate 103 back to the initial position;

[0029] The bottom side of the base 209 and the bottom wall of the housing 100 are fixedly connected with a fourth spring 210. The fourth spring 210 is used to push the pressure rod 200 upward back to the initial position (such as Figure 3 The inner wall of the housing 100 is fixedly connected with a slide rail 206, and the slide rail 206 is used for the normal sliding of the slider 211. The inner wall of the slide rail 206 is slidably connected with the slider 211. The slider 211 drives the card plate 208 to rotate by moving up and down. The inner wall of the housing 100 is rotatably connected with the card plate 208, and the card plate 208 rotates after the slider 211 moves down, so that the inclined plate 103 is out of the clamping state. The lower side of the card plate 208 and the upper end of the slider 211 are fixedly connected with a third spring 207. The third spring 207 is used for a certain buffer when the inclined plate 103 blocks the rotation path of the card plate 208 in the initial stage when the slider 211 moves downward, so that the inclined plate 103 moves downward under the pressure of the pressure rod 200 and then disengages from the rotation path of the card plate 208. The card plate 208 is pulled by the third spring 207 (such as Figure 5 The slider 211 is rotated in the direction of the arrow, and the lower end of the slider 211 and the lower end of the pressure rod 200 are fixedly connected to the linkage rod 205. The linkage rod 205 is used to drive the slider 211 to move downward when the pressure rod 200 moves downward;

[0030] The number of the clamping plate 204, the inclined plate 103 and the clamping plate 208 are two, and they are respectively arranged on both sides of the body 101 to ensure the stable operation and operation effect of the equipment.

[0031] The improvement of this embodiment is that:

[0032] During the process of replacing the main body 101, the staff only needs to press the pressure rod 200 to release the clamping effect of the shell 100 on the main body 101, so as to quickly and conveniently pull out the main body 101. Subsequently, the new main body 101 is pressed hard and inserted into the shell 100 to complete the replacement, which significantly improves the replacement efficiency. In the field of industrial automation, piezoelectric pressure sensors play a key role in monitoring fluid or gas pressure, and are essential to ensuring the stability and consistency of the production process. Therefore, the rapid replacement of piezoelectric pressure sensors can help reduce production interruption time caused by maintenance or replacement, thereby improving the overall efficiency of the production line.

[0033] Considering the stability of the body 101 when inserted into the shell 100, the inner wall of the shell 100 is fixedly connected to a limit rod 202, and the outer wall of the limit rod 202 is slidably connected to a clamping plate 204. The side of the clamping plate 204 opposite to the inner wall of the shell 100 is fixedly connected to the inner wall of the shell 100 with a second spring 203. The second spring 203 enables the clamping plate 204 to have a certain supporting force when clamping the body 101. The upper end of the side wall of the pressure rod 200 and the side of the clamping plate 204 close to the body 101 are rotatably connected to the rotating rod 201, so that the clamping plate 204 reciprocates when the pressure rod 200 moves up and down (such as Figure 6 The inner wall of the clamping plate 204 is evenly distributed with anti-slip grooves, thereby improving the stability of the main body 101 inside the shell 100.

[0034] When the piezoelectric pressure sensor of the utility model is used, when the operator applies force to press the pressure rod 200, the pressure rod 200 will move down along the preset path. This action triggers the displacement of the clamping plate 204, so that it is released from both sides of the body 101. At the same time, the downward movement of the pressure rod 200 will also guide the base 209 to move down synchronously. During the downward movement of the base 209, it not only drives the body 101 to move downward, but also makes the fourth spring 210 enter a compressed state. In addition, the downward movement of the pressure rod 200 is also guided by the linkage rod 205 to guide the slider 211 to move downward. In this process, the card plate 208 rotates under the pull of the third spring 207, and finally makes the card plate 208 fit closely to the inner wall of the housing 100.

[0035] In this state, the operator can easily pull the body 101 out of the housing 100. After completing this step, the operator can release all the applied pressure without continuing to press the pressure rod 200. Then, the operator inserts the new body 101 into the housing 100 with force until all components are reset, and the entire replacement process is completed.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A piezoelectric pressure sensor, comprising a housing (100), characterized in that: The inner wall of the housing (100) is slidably connected to a pressure rod (200), the lower end of the pressure rod (200) is fixedly connected to a base (209), a body (101) is mounted on the upper side of the base (209), grooves are provided on both sides of the body (101), and an inclined plate (103) is rotatably connected to the inner wall of the groove, and a first spring (102) is fixedly connected to the upper side of the inclined plate (103) and the inner wall of the groove of the body (101); The lower side of the base (209) and the bottom wall of the housing (100) are fixedly connected with a fourth spring (210); the inner wall of the housing (100) is fixedly connected with a slide rail (206); the inner wall of the slide rail (206) is slidably connected with a slider (211); the inner wall of the housing (100) is rotatably connected with a clamping plate (208); the lower side of the clamping plate (208) and the upper end of the slider (211) are fixedly connected with a third spring (207); the lower end of the slider (211) and the lower end of the pressure rod (200) are fixedly connected with a linkage rod (205).

2. The piezoelectric pressure sensor according to claim 1, characterized in that: The inner wall of the shell (100) is fixedly connected to a limit rod (202), the outer wall of the limit rod (202) is slidably connected to a clamping plate (204), the side of the clamping plate (204) opposite to the inner wall of the shell (100) is fixedly connected to a second spring (203) together with the inner wall of the shell (100), and the upper end of the side wall of the pressure rod (200) and the side of the clamping plate (204) close to the body (101) are rotatably connected to a rotating rod (201).

3. The piezoelectric pressure sensor according to claim 2, characterized in that: The number of the clamping plate (204), the inclined plate (103) and the clamping plate (208) are two each, and they are respectively arranged on both sides of the body (101).

4. The piezoelectric pressure sensor according to claim 1, characterized in that: The first spring (102) is initially in a compressed state.

5. The piezoelectric pressure sensor according to claim 2, characterized in that: The inner wall of the clamping plate (204) is evenly distributed with anti-slip patterns.

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