An intelligent high-precision pressure transmitter

Abstract

The present invention belongs to the technical field of transmitters, and specifically is an intelligent high-precision pressure transmitter, comprising a pressure transmitter body, a measuring diaphragm is arranged on the lower surface of the pressure transmitter body, a fixed shell is arranged on the outer side of the measuring diaphragm, the fixed shell and the lower surface of the pressure transmitter body are fixedly connected, a filter frame is fixedly connected inside the fixed shell, a rotating rod is rotatably connected inside the filter frame, one end of the rotating rod is rotatably connected to a plurality of limit rods, one end of each of the limit rods is fixedly connected to a scraper, the outer wall of the scraper is provided with an elastic sealing pad, and the lower surface of the fixed shell is fixedly connected to a baffle. By arranging the filter frame, impurities and scale can be filtered to prevent impurities and scale from adhering to the surface of the measuring diaphragm, resulting in slow response of the pressure transmitter body and measurement hysteresis.

Description

Technical Field

[0001] The invention belongs to the technical field of transmitters, in particular to an intelligent high-precision pressure transmitter. Background Art

[0002] The intelligent high-precision pressure transmitter is mainly composed of two parts: the intelligent sensor and the intelligent electronic board. The intelligent sensor part includes a capacitive sensor, a measuring diaphragm detection circuit, a temperature sensor, and a temperature compensation circuit. When the external pressure acts on the isolation diaphragm of the sensor, the pressure change can be transmitted to the measuring diaphragm located in the center through the transmission of the silicone oil, causing it to produce a small displacement, and the displacement distance is proportional to the pressure.

[0003] A patent application with publication number CN116147830B discloses a seismic-resistant intelligent pressure transmitter with adjustable hysteresis, a pressure transmitter body, a connector and a protective cleaning unit. The present invention provides a protective cleaning unit, which can protect the measuring diaphragm by covering the measuring diaphragm. When the pressure in the pipeline is too high due to pipeline debugging or other situations, the protective cleaning unit can protect the measuring diaphragm, block the pressure, and perform pressure isolation protection on the measuring diaphragm, thereby reducing the impact of water flow during the protection process.

[0004] When the above-mentioned prior art is in use, the cleaning mechanism directly contacts the measuring diaphragm to clean the impurities on the surface of the measuring diaphragm. Therefore, when impurities with strong adhesion appear, the cleaning mechanism may cause wear to the measuring diaphragm during cleaning, causing damage to the surface of the measuring diaphragm, resulting in a decrease in the service life of the measuring diaphragm. In severe cases, the measuring diaphragm may not be able to achieve high-precision measurement.

[0005] To this end, the present invention provides an intelligent high-precision pressure transmitter. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the intelligent high-precision pressure transmitter described in the present invention includes a pressure transmitter body, a measuring diaphragm is arranged on the lower surface of the pressure transmitter body, a fixed shell is arranged on the outer side of the measuring diaphragm, the fixed shell and the lower surface of the pressure transmitter body are fixedly connected, a filter frame is fixedly connected to the inside of the fixed shell, a rotating rod is rotatably connected to the inside of the filter frame, one end of the rotating rod is rotatably connected to a plurality of limit rods, one end of each of the limit rods is fixedly connected to a scraper, the outer wall of the scraper is provided with an elastic sealing pad, and the lower surface of the fixed shell is fixedly connected to a baffle.

[0008] Preferably, the outer wall of the fixed shell is fixedly connected to a first motor, the output end of the first motor is fixedly connected to a first bevel gear, one end of the rotating rod is fixedly connected to a second bevel gear, and the second bevel gear and the first bevel gear are meshed with each other.

[0009] Preferably, the interior of the rotating rod is slidably connected to an extrusion rod, one end of the extrusion rod is rotatably connected to a connecting plate, both ends of the connecting plate are provided with spring telescopic rods, the fixed end of the spring telescopic rod is fixedly connected to the surface of the filter frame, and the telescopic end of the spring telescopic rod is fixedly connected to the lower surface of the connecting plate.

[0010] Preferably, a second motor is provided on one side of the first motor, the second motor is fixedly connected to the outer wall of the fixed shell, the output end of the second motor is fixedly connected to a connecting rod, the surface of the connecting rod is fixedly connected to a cam, and one end of the cam is rotatably connected to the upper surface of the connecting plate.

[0011] Preferably, one end of each of the limit rods is fixedly connected to the limit plate, the interior of each limit plate and the inner wall of the rotating rod are elastically connected by a torsion spring, one end of each limit plate is fixedly connected to a protrusion, the surface of each protrusion is slidably connected to the limit frame, a slide groove is provided inside each of the limit frames, and the interior of the slide groove and the surface of the protrusion are slidably connected, and one side of each limit frame is fixedly connected to one end of the extrusion rod.

[0012] Preferably, a vibration rod is rotatably connected inside the limit rod, and one end of the vibration rod is fixedly connected to the inner wall of the scraper, a protrusion is symmetrically fixedly connected to the surface of the vibration rod, a vibration plate is symmetrically arranged on the surface of the protrusion, and the vibration plate is slidably connected to the inside of the scraper.

[0013] Preferably, a second spring is fixedly connected between the two vibration plates, and a plurality of cone heads are provided on the surfaces of the vibration plates.

[0014] Preferably, a fixed bevel gear is fixedly connected to the interior of the rotating rod, a third bevel gear is fixedly connected to one end of the vibration rod, and the third bevel gear and the fixed bevel gear are meshed with each other.

[0015] Preferably, the scrapers are configured to be fan-shaped, and the scrapers fit the surface of the filter frame in a working state.

[0016] Preferably, the cross-sectional shape of the filter frame is set to be an isosceles trapezoid, and one end of the extrusion rod is fixedly connected to a sealing frame.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The intelligent high-precision pressure transmitter described in the present invention is provided with a scraper, a filter frame and a limit rod. The filter frame can filter impurities and scale to prevent impurities and scale from adhering to the surface of the measuring diaphragm, resulting in slow response of the pressure transmitter body and measurement hysteresis. At the same time, the scraper is driven to rotate. The scraper can clean the impurities on the surface of the filter frame to prevent impurities from clogging the filter holes, thereby affecting the flow and distribution of the fluid, causing the measuring diaphragm to have an impact, thereby causing uneven pressure distribution, resulting in measurement errors, and excessive pressure in the pipeline during pipeline debugging or other situations. Multiple scrapers can be driven to rotate, and multiple scrapers are rotated from an inclined working state, so that multiple scrapers are rotated to a horizontal sealing state. At this time, both sides of the scraper are in contact with each other, and at the same time, the inner wall of the baffle is in contact with one end of the scraper. The sealing frame closes the gap between the scraper and the rotating rod. At this time, the cover plate can isolate the pressure and is used to perform a pressure reduction protection operation on the measuring diaphragm.

[0019] 2. The intelligent high-precision pressure transmitter described in the present invention is provided with a vibration plate and a cone head. When the scraper rotates, it can drive the vibration rod to rotate synchronously. The vibration rod drives the third bevel gear and the fixed bevel gear to engage, and the vibration rod rotates. The vibration rod drives the protrusion to rotate, and the protrusion squeezes the vibration plate to reciprocate inside the scraper to prevent impurities from being stuck between the two inclined scrapers and forming accumulations to cause blockage, which will not only affect the rotation of the scraper to measure the sealing operation of the diaphragm, but also cause the filter holes on the surface of the filter frame to be blocked, thereby affecting the normal distribution of the fluid, causing uneven pressure distribution, and leading to errors in measuring the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the pressure transmitter body of the present invention;

[0022] Figure 2 It is a bottom view of the structure of the pressure transmitter body of the present invention;

[0023] Figure 3 It is a structural explosion diagram of the pressure transmitter body and the fixed shell of the present invention;

[0024] Figure 4 is a structural cross-sectional view of the fixed shell of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the filter frame of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the filter frame and the scraper of the present invention;

[0027] Figure 7It is a structural schematic diagram of the scraper of the present invention;

[0028] Figure 8 It is a schematic diagram of the internal structure of the rotating rod of the present invention;

[0029] Fig. 9 It is a schematic structural diagram of a limiting plate and a limiting frame of the present invention;

[0030] Fig.10 is a cross-sectional view of the internal structure of the scraper of the present invention;

[0031] In the figure: 1. pressure transmitter body; 11. measuring diaphragm; 2. fixed shell; 21. baffle; 22. first motor; 23. first bevel gear; 24. second motor; 3. rotating rod; 31. second bevel gear; 32. sealing frame; 33. fixed bevel gear; 4. filter frame; 5. connecting rod; 51. cam; 6. spring telescopic rod; 61. connecting plate; 62. extrusion rod; 621. limit frame; 7. scraper; 71. vibration plate; 72. limit rod; 73. limit plate; 74. vibration rod; 75. third bevel gear; 76. bump; 77. second spring; 78. cone head. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] Embodiment 1: Figures 1 to 4 , Figure 7 As shown, an intelligent high-precision pressure transmitter described in an embodiment of the present invention includes a pressure transmitter body 1, a measuring diaphragm 11 is provided on the lower surface of the pressure transmitter body 1, a fixed shell 2 is provided on the outer side of the measuring diaphragm 11, the fixed shell 2 and the lower surface of the pressure transmitter body 1 are fixedly connected, a filter frame 4 is fixedly connected inside the fixed shell 2, a rotating rod 3 is rotatably connected inside the filter frame 4, one end of the rotating rod 3 is rotatably connected to a plurality of limiting rods 72, one end of each of the limiting rods 72 is fixedly connected to a scraper 7, the outer wall of the scraper 7 is provided with an elastic sealing pad, a baffle 21 is fixedly connected to the lower surface of the fixed shell 2, the shape of the plurality of scrapers 7 is set to be fan-shaped, and the scraper 7 fits with the surface of the filter frame 4 in the working state, the cross-sectional shape of the filter frame 4 is set to be an isosceles trapezoid, the inside of the rotating rod 3 is slidably connected to an extrusion rod 62, and one end of the extrusion rod 62 is fixedly connected to a sealing frame 32.

[0034] Specifically, when the initial debugging of the pipeline is performed, the pressure fluctuation in the pipeline is large during debugging, which may cause an instantaneous high pressure shock, which may damage the measuring diaphragm 11. At this time, the pipeline contains a large amount of impurities, such as welding slag, which can easily damage the measuring diaphragm 11 and adhere to the surface of the measuring diaphragm 11.

[0035] When the pressure inside the pipeline is high, the prior art provides a cleaning mechanism to cover the measuring diaphragm 11 to protect the measuring diaphragm 11. When impurities are attached to the surface of the measuring diaphragm 11, the cleaning mechanism can clean the impurities on the surface of the measuring diaphragm 11.

[0036] When the above-mentioned prior art is in use, the cleaning mechanism directly contacts the measuring diaphragm 11 to clean the impurities on the surface of the measuring diaphragm 11. Therefore, when there are impurities with strong adhesion, the cleaning mechanism may cause wear to the measuring diaphragm 11 during cleaning, causing damage to the surface of the measuring diaphragm 11, resulting in a reduction in the service life of the measuring diaphragm 11. In severe cases, the measuring diaphragm 11 may not be able to achieve high-precision measurement work;

[0037] In this embodiment, the pressure transmitter body 1 is an intelligent pressure transmitter in the prior art, and one end of the pressure transmitter body 1 is connected to a pipeline or other container to be measured;

[0038] The working principle of this embodiment is as follows: the pressure transmitter body 1 is connected to the pipeline, the fluid is passed into the pipeline, the measuring diaphragm 11 is in contact with the fluid and cooperates with the pressure sensor to sense the pressure signal, and then the pressure signal is converted into an analog electrical signal output, and the processed electrical signal is output in an analog form. These analog signals are directly connected to the programmable logic controller to achieve the measurement and control of pressure, liquid level or density;

[0039] When the fluid contains impurities, the impurities will be filtered by the filter frame 4. At this time, the rotating rod 3 is driven to rotate, and the rotating rod 3 drives the limit rod 72 to rotate, and the limit rod 72 drives the scraper 7 to rotate. When the scraper 7 is in the working state, one side of the scraper 7 is in contact with the surface of the filter frame 4. When the scraper 7 is in the sealed state, the two sides of multiple scrapers 7 are in contact with each other, and the baffle 21 can be used to seal the fixed shell 2. When the scraper 7 is in the working state and is tilted, the scraper 7 can clean the impurities on the surface of the filter frame 4 to avoid the problem of impurities causing the filter holes on the filter frame 4 to be blocked. The filter frame 4 can prevent impurities from directly adhering to the surface of the measuring diaphragm 11, thereby reducing the obstruction of the measuring diaphragm 11 by impurities and scale, and further reducing the situation where the impurities obstruct the pressure transmitter body 1 and cause hysteresis;

[0040] When the pipeline is initially debugged, the limit rod 72 can be driven to rotate, and the limit rod 72 rotates and drives the scraper 7 to rotate. The scraper 7 changes from an inclined state in the working state to a horizontal state in the sealing state. The multiple scrapers 7 are tightly fitted through elastic sealing pads. At the same time, one end of the scraper 7 and the baffle 21 are tightly fitted, and the extrusion rod 62 is driven to move upward. The extrusion rod 62 drives the sealing frame 32 to slide upward, so that one end of the sealing frame 32 is fitted with one side of the scraper 7. The sealing frame 32 is used to seal the gap between the scraper 7 and the rotating rod 3. At this time, the fixed shell 2 can be sealed, and the fixed shell 2 covers the measuring diaphragm 11;

[0041] The filter frame of this embodiment can filter impurities and scale to prevent impurities and scale from adhering to the surface of the measuring diaphragm, which may cause the pressure transmitter body to respond slowly and measure hysteresis. The scraper 7 can clean the impurities filtered on the surface of the filter frame 4 to avoid cleaning the filter holes of the filter frame 4. The scraper 7 can be changed into a sealing state to cover the measuring diaphragm 11 to avoid large pressure fluctuations in the pipeline during debugging, which may cause instantaneous high pressure shocks and damage the measuring diaphragm 11.

[0042] like Figure 4 As shown, the outer wall of the fixed shell 2 is fixedly connected to the first motor 22, the output end of the first motor 22 is fixedly connected to the first bevel gear 23, one end of the rotating rod 3 is fixedly connected to the second bevel gear 31, and the second bevel gear 31 and the first bevel gear 23 are meshed with each other.

[0043] Specifically, the first motor 22 is turned on, and the first motor 22 drives the first bevel gear 23 to rotate. The first bevel gear 23 is meshed with the second bevel gear 31 on the surface of the rotating rod 3, so that the second bevel gear 31 drives the rotating rod 3 to rotate synchronously. The rotation of the rotating rod 3 can drive the scraper 7 at one end of the limiting rod 72 to rotate synchronously, so that the scraper 7 can rotate on the surface of the filter frame 4 to perform a cleaning operation on the surface of the filter frame 4.

[0044] like Figure 5 As shown, one end of the extrusion rod 62 is rotatably connected to a connecting plate 61, and both ends of the connecting plate 61 are provided with spring telescopic rods 6, the fixed end of the spring telescopic rod 6 is fixedly connected to the surface of the filter frame 4, and the telescopic end of the spring telescopic rod 6 is fixedly connected to the lower surface of the connecting plate 61.

[0045] like Figure 5 As shown, a second motor 24 is provided on one side of the first motor 22, the second motor 24 is fixedly connected to the outer wall of the fixed shell 2, the output end of the second motor 24 is fixedly connected to a connecting rod 5, the surface of the connecting rod 5 is fixedly connected to a cam 51, and one end of the cam 51 is rotatably connected to the upper surface of the connecting plate 61.

[0046] like Figure 8 and Fig. 9 As shown, one end of each of the limit rods 72 is fixedly connected to the limit plate 73, the interior of each of the limit plates 73 and the inner wall of the rotating rod 3 are elastically connected by a torsion spring, one end of each of the limit plates 73 is fixedly connected with a protrusion, the surface of each of the protrusions is slidably connected to the limit frame 621, and a sliding groove is provided inside each of the limit frames 621, and the interior of the sliding groove and the surface of the protrusion are slidably connected, and one side of each of the limit frames 621 is fixedly connected to one end of the extrusion rod 62.

[0047] Specifically, the spring telescopic rod 6 is initially in a compressed state. When the scraper 7 needs to be changed from an inclined state to a horizontal sealing state, the second motor 24 is turned on, and the second motor 24 drives the connecting rod 5 to rotate, and the connecting rod 5 drives the cam 51 to rotate, and the cam 51 drives the connecting plate 61 to move upward, and the connecting plate 61 drives the extrusion rod 62 to move upward, and the extrusion rod 62 drives the limit frame 621 to move upward, so that the protrusion slides in the internal limit groove of the limit frame 621, and the sliding of the protrusion drives the limit plate 73 to rotate, and the limit plate 73 is reset by the torsion spring inside it, and the limit plate 73 drives the rotating rod 3 to rotate synchronously, and the rotating rod 3 drives the scraper 7 to rotate synchronously, so that the scraper 7 is changed from an inclined state to a horizontal state, and at the same time, the extrusion rod 62 drives the sealing frame 32 to slide upward synchronously, so that the measuring diaphragm 11 can be covered, thereby protecting the measuring diaphragm 11.

[0048] Embodiment 2: Fig. 9 and Fig.10 As shown, compared with Example 1, another embodiment of the present invention is: the internal rotation of the limit rod 72 is connected to a vibration rod 74, and one end of the vibration rod 74 is fixedly connected to the inner wall of the scraper 7, the surface of the vibration rod 74 is symmetrically fixedly connected with a protrusion 76, the surface of the protrusion 76 is symmetrically provided with a vibration plate 71, and the vibration plate 71 is slidably connected to the inside of the scraper 7.

[0049] like Fig.10 As shown, a second spring 77 is fixedly connected between the two vibration plates 71 , and a plurality of cone heads 78 are disposed on the surfaces of the vibration plates 71 .

[0050] like Fig.10 As shown, a fixed bevel gear 33 is fixedly connected inside the rotating rod 3, and a third bevel gear 75 is fixedly connected to one end of the vibration rod 74, and the third bevel gear 75 and the fixed bevel gear 33 are meshed with each other.

[0051] Specifically, when the scraper 7 is in an inclined state, impurities in the fluid may aggregate and be blocked between adjacent scrapers 7. A large amount of impurities blocked between adjacent scrapers 7 will not only hinder the rotation of the scraper 7, making it difficult to achieve the subsequent effect of covering the measuring diaphragm 11 for protection, but also the impurity blockage will slow down the efficiency of the fluid entering the filter frame 4, resulting in uneven pressure distribution, leading to measurement errors.

[0052] In order to solve the above problem, the present embodiment is as follows: when the rotating rod 3 drives the scraper 7 at one end of the limiting rod 72 to rotate, the scraper 7 drives the vibration rod 74 inside it to rotate, and the vibration rod 74 drives the third bevel gear 75 to rotate around the fixed bevel gear 33, and at the same time the third bevel gear 75 and the fixed bevel gear 33 are meshed, so that the third bevel gear 75 drives the vibration rod 74 to rotate, and the vibration rod 74 drives the protrusion 76 to rotate, and the protrusion 76 squeezes the two vibration plates 71 to slide inside the scraper 7, and the vibration plate 71 drives the cone head 78 to contact with impurities, so that the impurities can fall off from between the adjacent vibration plates 71;

[0053] This embodiment can clean up the impurities between adjacent scrapers 7 to prevent the impurities from getting stuck between the two inclined scrapers 7 and forming accumulation to cause blockage, which will not only affect the rotation of the scraper 7 to measure the sealing operation of the diaphragm 11, but also cause the filter holes on the surface of the filter frame 4 to be blocked, thereby affecting the normal distribution of the fluid, causing uneven pressure distribution, and leading to errors in measurement of the measuring diaphragm 11.

[0054] Working principle: the pressure transmitter body 1 is connected to the pipeline, the fluid is passed into the pipeline, the measuring diaphragm 11 contacts the fluid and cooperates with the pressure sensor to sense the pressure signal, and then converts the pressure signal into an analog electrical signal output. The processed electrical signal is output in analog form. These analog signals are directly connected to the programmable logic controller to achieve the measurement and control of pressure, liquid level or density;

[0055] When the fluid contains impurities, the impurities will be filtered by the filter frame 4, the first motor 22 is turned on, the first motor 22 drives the first bevel gear 23 to rotate, the first bevel gear 23 is meshed with the second bevel gear 31 on the surface of the rotating rod 3, so that the second bevel gear 31 drives the rotating rod 3 to rotate synchronously, and the rotation of the rotating rod 3 can drive the scraper 7 at one end of the limiting rod 72 to rotate synchronously. At this time, the scraper 7 is in a working state and is tilted. The scraper 7 can clean the impurities on the surface of the filter frame 4;

[0056] When the preliminary debugging of the pipeline is carried out, the scraper 7 needs to be changed from the inclined state to the horizontal sealing state, the second motor 24 is turned on, the second motor 24 drives the connecting rod 5 to rotate, the connecting rod 5 drives the cam 51 to rotate, the cam 51 drives the connecting plate 61 to move upward, the connecting plate 61 drives the extrusion rod 62 to move upward, the extrusion rod 62 drives the limit frame 621 to move upward, so that the protrusion slides in the internal limit groove of the limit frame 621, and the protrusion slides while driving the limit plate 73 to rotate, the limit plate 73 is reset by the torsion spring inside it, the limit plate 73 drives the rotating rod 3 to rotate synchronously, the rotating rod 3 drives the scraper 7 to rotate synchronously, so that the scraper 7 changes from the inclined state to the horizontal state, and at the same time the extrusion rod 62 drives the sealing frame 32 to slide upward synchronously, so that the lower surface of the sealing frame 32 and the upper surface of the scraper 7 are fitted, the sealing frame 32 is used to seal the gap between the scraper 7 and the rotating rod 3, so that the measuring diaphragm 11 can be covered, thereby protecting the measuring diaphragm 11;

[0057] When the scraper 7 cleans the impurities on the surface of the filter frame 4, and in order to prevent impurities from being blocked between adjacent scraper plates 7, the rotating rod 3 drives the scraper 7 at one end of the limiting rod 72 to rotate, and the scraper 7 drives the vibration rod 74 inside it to rotate, and the vibration rod 74 drives the third bevel gear 75 to rotate around the fixed bevel gear 33. At the same time, the third bevel gear 75 and the fixed bevel gear 33 are meshed, so that the third bevel gear 75 drives the vibration rod 74 to rotate, and the vibration rod 74 drives the protrusion 76 to rotate. The protrusion 76 squeezes the two vibration plates 71 to slide inside the scraper 7, and the vibration plate 71 drives the cone head 78 to contact the impurities, so that the impurities can fall off from between adjacent vibration plates 71.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An intelligent high-precision pressure transmitter, characterized in that: The pressure transmitter comprises a pressure transmitter body (1), a measuring diaphragm (11) being arranged on the lower surface of the pressure transmitter body (1), a fixed shell (2) being arranged on the outer side of the measuring diaphragm (11), the fixed shell (2) being fixedly connected to the lower surface of the pressure transmitter body (1), a filter frame (4) being fixedly connected inside the fixed shell (2), a rotating rod (3) being rotatably connected inside the filter frame (4), one end of the rotating rod (3) being rotatably connected to a plurality of limiting rods (72), one end of each limiting rod (72) being fixedly connected to a scraper (7), the outer wall of each scraper (7) being provided with an elastic sealing pad, and a baffle (21) being fixedly connected to the lower surface of the fixed shell (2); A first motor (22) is fixedly connected to the outer wall of the fixed housing (2), a first bevel gear (23) is fixedly connected to the output end of the first motor (22), a second bevel gear (31) is fixedly connected to one end of the rotating rod (3), and the second bevel gear (31) and the first bevel gear (23) are meshed with each other; The rotating rod (3) is internally slidably connected to an extrusion rod (62), one end of the extrusion rod (62) is rotatably connected to a connecting plate (61), both ends of the connecting plate (61) are provided with spring telescopic rods (6), the fixed end of the spring telescopic rod (6) is fixedly connected to the surface of the filter frame (4), and the telescopic end of the spring telescopic rod (6) is fixedly connected to the lower surface of the connecting plate (61); A second motor (24) is provided on one side of the first motor (22); the second motor (24) is fixedly connected to the outer wall of the fixed shell (2); an output end of the second motor (24) is fixedly connected to a connecting rod (5); a surface of the connecting rod (5) is fixedly connected to a cam (51); one end of the cam (51) is rotatably connected to the upper surface of a connecting plate (61); One end of each of the limit rods (72) is fixedly connected to the limit plate (73), the interior of each of the limit plates (73) and the inner wall of the rotating rod (3) are elastically connected via a torsion spring, one end of each of the limit plates (73) is fixedly connected to a protrusion, the surface of each of the protrusions is slidably connected to the limit frame (621), a slide groove is provided inside each of the limit frames (621), and the interior of the slide groove and the surface of the protrusion are slidably connected, and one side of each of the limit frames (621) is fixedly connected to one end of the extrusion rod (62); The shape of the plurality of scrapers (7) is arranged to be fan-shaped, and the scrapers (7) are in contact with the surface of the filter frame (4) in a working state.

2. The intelligent high-precision pressure transmitter according to claim 1 is characterized in that: The cross-sectional shape of the filter frame (4) is set to be an isosceles trapezoid, and one end of the extrusion rod (62) is fixedly connected to the sealing frame (32).

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