Intelligent pressure transmitter and temperature compensation method thereof

Abstract

The invention discloses an intelligent pressure transmitter and a temperature compensation method thereof, and relates to the technical field of pressure transmitters, the intelligent pressure transmitter comprises a bottom shell, the bottom shell is internally provided with a detection mechanism, the detection mechanism comprises an inner cylinder, the inner cylinder is sleeved with an upper shell, the bottom surface of the inner cylinder is fixedly provided with an isolation sleeve, and the isolation sleeve is fixedly connected with the inner cylinder; one side of the isolation sleeve is provided with a measuring chamber used for liquid pressure detection, the compensation mechanism comprises a placement frame, the placement frame is fixedly installed in the inner cylinder, a central processing unit is fixedly installed on the upper surface of the placement frame, and a main signal line is arranged on the upper surface of the central processing unit; the cooling ring is arranged on the inner side surface of the isolation sleeve, the limiting assembly comprises a mounting frame, and the mounting frame is fixedly mounted on the bottom surface of the isolation plate, in the scheme, through arrangement of the compensation mechanism, the cooling mechanism and the limiting assembly, detection errors caused by temperature changes are reduced, the detection efficiency is improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of pressure transmitters, in particular to an intelligent pressure transmitter and a temperature compensation method thereof. Background Art

[0002] With the rapid development of modern industrial technology, pressure detection is increasingly used in various fields, such as petrochemical, aerospace, automobile manufacturing, etc. In these industries, accurate pressure detection is crucial to ensure equipment safety, improve production efficiency and product quality. In the field of industrial automation and process control, intelligent pressure transmitters, as key instrument equipment, are widely used in pressure measurement and monitoring of various media.

[0003] Traditional pressure detection equipment usually uses mechanical or electronic sensors to convert the change in medium pressure into an electrical signal output. However, traditional temperature compensation methods often use the equipment to generate corresponding electrical signals when the temperature changes to correct the output signal of the main measuring element, but the detection part at the bottom is still in a higher temperature area. After long-term use, the elastic modulus and yield strength of the diaphragm will decrease under the influence of high temperature, which means that the diaphragm is more likely to deform or yield when subjected to the same stress, resulting in a decrease in the torsional stiffness and fatigue resistance of the diaphragm, affecting the stability and service life of the equipment. When detecting a detection medium with a higher temperature, the liquid medium with a lower internal temperature is affected by the higher temperature detection liquid, which may cause a large temperature change in the detection area in a short period of time. In an environment with large temperature changes, due to the thermal expansion and contraction effect of the material, the measurement accuracy is often reduced or even the sensor is damaged. Summary of the invention

[0004] The object of the present invention is to provide an intelligent pressure transmitter and a temperature compensation method thereof to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an intelligent pressure transmitter and a temperature compensation method thereof, comprising:

[0006] A bottom shell, wherein a detection mechanism is arranged inside the bottom shell, an upper shell is fixedly mounted on the upper surface of the bottom shell, a pressure sensor body is fixedly mounted on the top of the upper shell, and a display screen is provided on one side surface of the pressure sensor body;

[0007] The detection mechanism comprises: an inner cylinder, the inner cylinder is sleeved inside the upper shell, an isolation sleeve is fixedly installed on the bottom surface of the inner cylinder, a measuring chamber for liquid pressure detection is opened on one side of the isolation sleeve, and a temperature detector is arranged inside the measuring chamber;

[0008] The compensation mechanism comprises: a mounting frame, the mounting frame is fixedly mounted inside the inner tube, a central processing unit is fixedly mounted on the upper surface of the mounting frame, and a total signal line is arranged on the upper surface of the central processing unit;

[0009] The cooling mechanism comprises: a cooling ring, the cooling ring is arranged on the inner side surface of the insulating sleeve, the outer surface of the cooling ring is sleeved with an air duct ring, and the two side surfaces of the air duct ring are also provided with an air inlet and an air outlet, and the air inlet and the air outlet are both connected to the interior of the air duct ring;

[0010] The limiting component includes: a mounting frame, the mounting frame is fixedly mounted on the bottom surface of the isolation plate, the limiting frame is fixedly mounted on the upper surface of the mounting frame, and a water outlet hole communicating with the injection pipe is opened at the center of the limiting frame.

[0011] Furthermore, a connecting port is provided on the side surface of the bottom shell, a pressure-conducting pipe is connected to the side surface of the connecting port, connecting flanges are fixedly installed on both ends of the pressure-conducting pipe, one end of the pressure-conducting pipe is connected to a fixing plate via a connecting flange, a check valve is also provided on the other end of the pressure-conducting pipe via a connecting flange, one side of the check valve is connected to a connecting branch pipe, and the connecting branch pipe is fixedly installed on one side surface of the process pipeline.

[0012] Furthermore, a diaphragm body is arranged at the center of the isolating sleeve, an isolation plate is also arranged inside the inner tube, an injection pipe is arranged at the center of the isolation plate, a nozzle matching the injection pipe is opened on the side surface of the upper shell, a rotatable switch pull rod is also arranged on the side surface of the upper shell, and a shielding plate is fixedly connected to one side surface of the switch pull rod.

[0013] Furthermore, a driving motor is fixedly mounted on the side surface of the inner cylinder, a gas plug pile is fixedly mounted on the end of the output shaft of the driving motor, a stabilizing frame is sleeved on the surface of the gas plug pile, and the stabilizing frame is fixedly mounted on the upper surface of the isolation sleeve.

[0014] Furthermore, an air cavity is opened on the side surface of the isolation sleeve facing away from the measuring chamber, and a pressure air hole connected to the air cavity is fixedly installed on the upper surface of the isolation sleeve. One end of the air plug pile is located inside the pressure air hole, and the driving motor and the temperature detector are connected to the central processing unit via cables.

[0015] Furthermore, a small fan is disposed inside the bottom shell, an air outlet of the small fan is connected to the air inlet, and both side surfaces of the bottom shell are provided with wind slots matching the small fan.

[0016] Furthermore, a plurality of connecting legs are fixedly mounted on the bottom surface of the limiting frame, the bottom surface of the connecting legs is fixedly connected to the upper surface of the mounting frame, and a plurality of limiting top piles are provided on the bottom surface of the limiting frame.

[0017] Furthermore, a one-way water inlet matched with the water outlet is provided at the center of the mounting frame, a plurality of waterproof leaves are provided at the center of the one-way water inlet, the number of the limiting top piles is the same as that of the waterproof leaves, and each waterproof leaf is matched with a limiting top pile;

[0018] A temperature compensation method for an intelligent pressure transmitter comprises the following steps:

[0019] S1: Pressure detection, the liquid medium enters the bottom shell through the pressure pipe, pushes the diaphragm body in the measuring chamber, and the deformation of the diaphragm body is converted into an electrical signal output through the measuring circuit;

[0020] S2: Temperature sensing, which monitors the temperature of the liquid medium inside the measuring chamber in real time through a temperature detector and transmits the data to a central processor, which processes the data and adjusts the air pressure in the air cavity accordingly;

[0021] S3: Temperature compensation, by increasing the air pressure in the air cavity, the diaphragm body is bent to a specified arc. The arc of this bending is the range of influence caused by temperature. When the pressure during the test acts on the diaphragm body, it will first compensate for the specified degree of bending, and then generate normal test data;

[0022] S4: Cooling operation. When the temperature in the measuring chamber exceeds the set value, the temperature detector sends a signal to the central processor, which controls the small fan to start and cool the measuring chamber through the air duct ring and the cooling ring.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In this solution, by providing a compensation mechanism, the temperature in the measuring chamber is monitored in real time, and the air pressure in the air cavity is automatically adjusted according to the temperature change. By accurately controlling the air pressure in the air cavity, the compensation mechanism can quickly respond to temperature changes and achieve instant compensation for diaphragm deformation, thereby reducing the detection error caused by temperature changes, improving the detection efficiency, offsetting the diaphragm deformation and resistance value changes caused by temperature fluctuations, and ensuring that under different temperature conditions, the pressure on the diaphragm body can accurately reflect the actual pressure in the process pipeline, thereby greatly improving the accuracy and reliability of pressure detection;

[0025] 2. In this scheme, a cooling mechanism is provided to cool the liquid medium in the measuring chamber by introducing external cold air, which effectively reduces the thermal impact of the high temperature environment on the diaphragm material, prevents the diaphragm from being deformed or damaged due to overheating, and extends the service life of the diaphragm. By maintaining the low temperature state of the measuring chamber and its surrounding areas, the influence of temperature on the deformation and resistance value of the diaphragm is reduced, ensuring the stability and accuracy of the test results;

[0026] 3. In this solution, a limiting component is provided, and the one-way water inlet and the limiting top pile work together to prevent the backflow of the liquid medium during the measurement process. Under high pressure or abnormal working conditions, the limiting component can firmly fix the one-way water inlet to prevent it from accidentally opening due to air pressure fluctuations, thereby ensuring the stability and purity of the liquid medium in the measurement chamber, avoiding measurement errors caused by liquid reflux, and improving the accuracy of pressure detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the internal structure of the bottom shell of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the pressure-conducting pipe of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the mounting frame of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the restriction component of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the measuring chamber of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the compensation mechanism of the present invention;

[0034] Figure 8 It is a schematic diagram of the air duct ring structure of the present invention.

[0035] In the figure: 1, bottom shell; 2, upper shell; 3, pressure sensor body; 4, display screen; 5, connection port; 6, air slot; 7, pressure pipe; 8, check valve; 9, connecting branch pipe; 10, process pipeline; 11, isolation sleeve; 12, measuring chamber; 13, diaphragm body; 14, inner cylinder; 15, injection pipeline; 16, injection port; 17, switch pull rod; 18, fixing plate; 19, connecting flange; 20, isolation plate; 21, shielding plate ; 22. Temperature detector; 23. Mounting frame; 24. One-way water inlet; 25. Limiting frame; 26. Connecting legs; 27. Water outlet; 28. Limiting top pile; 29. ​​Small fan; 30. Cooling ring; 31. Air duct ring; 32. Air cavity; 33. Mounting frame; 34. Central processing unit; 35. Main signal line; 36. Driving motor; 37. Air plug pile; 38. Stabilizing frame; 39. Air pressure hole; 40. Air inlet; 41. Air outlet. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figures 1 to 8 , an intelligent pressure transmitter and a temperature compensation method thereof, comprising:

[0038] A bottom shell 1, wherein a detection mechanism is arranged inside the bottom shell 1, an upper shell 2 is fixedly installed on the upper surface of the bottom shell 1, a pressure sensor body 3 is fixedly installed on the top of the upper shell 2, a display screen 4 is arranged on one side surface of the pressure sensor body 3, a connecting port 5 is arranged on the side surface of the bottom shell 1, a pressure guiding pipe 7 is connected to the side surface of the connecting port 5, connecting flanges 19 are fixedly installed on both ends of the pressure guiding pipe 7, one end of the pressure guiding pipe 7 is connected to a fixing plate 18 via the connecting flange 19, a check valve 8 is also arranged on the other end of the pressure guiding pipe 7 via the connecting flange 19, a connecting branch pipe 9 is connected to one side of the check valve 8, and the connecting branch pipe 9 is fixedly installed on one side surface of the process pipeline 10. When in use, liquid medium is injected into the pressure guiding pipe 7 and the inside of the bottom shell 1 by staff, and the detection liquid is injected into the inside of the process pipeline 10.

[0039] The detection mechanism includes: an inner cylinder 14, the inner cylinder 14 is sleeved inside the upper shell 2, an isolation sleeve 11 is fixedly installed on the bottom surface of the inner cylinder 14, a measuring chamber 12 for liquid pressure detection is provided on one side of the isolation sleeve 11, a temperature detector 22 is provided inside the measuring chamber 12, a diaphragm body 13 is provided at the center of the isolation sleeve 11, an isolation plate 20 is also provided inside the inner cylinder 14, a liquid injection pipeline 15 is provided at the center of the isolation plate 20, a nozzle 16 matching the liquid injection pipeline 15 is provided on the side surface of the upper shell 2, a rotatable switch pull rod 17 is also provided on the side surface of the upper shell 2, and a shielding plate 21 is fixedly connected to one side surface of the switch pull rod 17. When the detection liquid passes through the inside of the process pipeline 10, under the action of pressure Under the action of the check valve 8, the liquid medium inside the pressure-conducting tube 7 will be pushed toward the inside of the bottom shell 1. Because of the action of the check valve 8, the liquid medium inside the pressure-conducting tube 7 will not flow back to the inside of the process pipeline 10. After the detection liquid pushes the liquid medium into the inside of the bottom shell 1, because the liquid medium is also injected into the measuring chamber 12 inside the bottom shell 1 in advance, after being subjected to the pressure transmitted by the pressure-conducting tube 7, under the action of the internal liquid medium, the pressure is transmitted to the surface of the diaphragm body 13, driving the diaphragm body 13 to deform, and converting it into an electrical signal output through the measuring circuit. After completing the pressure detection inside the bottom shell 1, the data is processed and the final data is transmitted to the pressure sensor body 3, and the staff can record the data by observing the display screen 4.

[0040] The above process is the basic process of current pressure detection.

[0041] However, in the actual pressure detection process, when the detection liquid has a certain high temperature, it will affect the strength and toughness of the diaphragm material during detection. When the diaphragm material is heated, thermal expansion will occur. When detecting hotter liquids, the deformation degree of the diaphragm may be relatively large. When the diaphragm is deformed, the internal resistance will usually increase after being heated, thereby causing temperature drift, resulting in errors in the output signal of the pressure transmitter. As the temperature rises, the yield strength and elastic modulus of the material may decrease, while the toughness may increase. At high temperatures, the diaphragm may be more susceptible to plastic deformation, causing problems that affect the service life of the diaphragm. After the liquid medium is injected into the bottom shell 1, the pressure may be shared by the injection port during detection due to the design of the injection port, and the problem cannot be fully applied to the diaphragm.

[0042] Therefore, based on the above problem, we first design a compensation mechanism, which includes: a mounting frame 33, the mounting frame 33 is fixedly installed inside the inner tube 14, a central processing unit 34 is fixedly installed on the upper surface of the mounting frame 33, a total signal line 35 is arranged on the upper surface of the central processing unit 34, the total signal line 35 is electrically connected to the pressure sensor body 3, a driving motor 36 is fixedly installed on the side surface of the inner tube 14, an air plug pile 37 is fixedly installed on the end of the output shaft of the driving motor 36, a stabilizing frame 38 is sleeved on the surface of the air plug pile 37, the stabilizing frame 38 is fixedly installed on the upper surface of the isolation sleeve 11, an air cavity 32 is opened on the side surface of the isolation sleeve 11 away from the measuring chamber 12, a compressed air hole 39 connected to the air cavity 32 is fixedly installed on the upper surface of the isolation sleeve 11, one end of the air plug pile 37 is located inside the compressed air hole 39, the driving motor 36 and the temperature detector 22 are connected to the central processing unit 34 through cables;

[0043] During the detection, the compensation mechanism adjusts the bending curvature of the diaphragm body 13 by adjusting the internal pressure environment of the air cavity 32 in real time, so as to offset the deformation of the diaphragm and the change of the resistance value caused by the temperature change, thereby improving the accuracy of the pressure detection. The temperature in the measuring chamber 12 is detected in real time by the temperature detector 22, and the temperature signal is transmitted to the central processing unit 34 through the cable. After receiving the temperature signal, the central processing unit 34 analyzes the influence of the temperature on the deformation and resistance value of the diaphragm according to the preset algorithm, calculates the pressure compensation amount to be adjusted, and drives the motor 36 to start according to the instruction of the central processing unit 34, and the air plug pile 37 is used to press the air hole 3 to open the pressure compensation amount. 9 moves in the air cavity 32 to adjust the air pressure in the air cavity 32. The air cavity 32 and the measuring chamber 12 are isolated by the diaphragm body 13. When the air pressure in the air cavity 32 changes, the diaphragm body 13 is deformed from one side to compensate for the error caused by temperature. Because the surface of the diaphragm body 13 is bent, the force point of the diaphragm body 13 changes during the pressure test, and has a more concentrated force position, thereby achieving a more accurate detection effect. The central processing unit 34 continuously receives new temperature signals and controls the air pressure in the air cavity 32 according to actual conditions, thereby adjusting the compensation amount to ensure the accuracy of pressure detection.

[0044] At the same time, based on the above problems, we designed a cooling mechanism, which includes: a cooling ring 30, which is arranged on the inner side surface of the insulating sleeve 11, and the outer surface of the cooling ring 30 is sleeved with a duct ring 31, which is a hollow structure, and the two side surfaces of the duct ring 31 are also provided with an air inlet 40 and an air outlet 41, and the air inlet 40 and the air outlet 41 are both connected to the inside of the duct ring 31, and a small fan 29 is also arranged inside the bottom shell 1, and the air outlet end of the small fan 29 is connected to the air inlet 40, and the two side surfaces of the bottom shell 1 are opened with wind slots 6 matched with the small fan 29;

[0045] The cooling mechanism cools the liquid medium in the measuring chamber 12 by introducing external cold air, thereby reducing the impact on the diaphragm body 13. When in use, the temperature of the liquid medium in the measuring chamber 12 is monitored in real time by the temperature detector 22. After the temperature of the internal liquid medium is affected by the detection liquid and the temperature rises to the specified temperature, the temperature detector 22 transmits a signal to the central processor 34, and the central processor 34 sends a signal to control the small fan 29 to start, and the external cold air is sucked into the bottom shell 1 through the wind slot 6. The cold air then enters the air duct ring 31 through the air inlet 40 on its side. The cold air flows in the air duct ring 31, and then absorbs the internal heat through the cooling ring 30, and transfers the heat to the surface of the air duct ring 31, and the heat is taken away by the cold air when passing through, so as to cool the insulating sleeve 11 and the measuring chamber 12 inside it. The cooled hot air is discharged from the bottom shell 1 through the air outlet 41, ensuring that the measuring chamber 12 and its surrounding area are maintained at a low temperature level, reducing the impact of high temperature on the diaphragm material.

[0046] At the same time, based on the previous problems, we also designed a limiting component, which includes: a mounting frame 23, the mounting frame 23 is fixedly mounted on the bottom surface of the isolation plate 20, the temperature detector 22 is arranged on the bottom surface of the mounting frame 23, a limiting frame 25 is fixedly mounted on the upper surface of the mounting frame 23, a water outlet 27 communicating with the injection pipe 15 is opened at the center of the limiting frame 25, a plurality of connecting legs 26 are fixedly mounted on the bottom surface of the limiting frame 25, the bottom surface of the connecting legs 26 is fixedly connected to the upper surface of the mounting frame 23, a plurality of limiting top piles 28 are opened on the bottom surface of the limiting frame 25, a one-way water inlet 24 matched with the water outlet 27 is opened at the center of the mounting frame 23, a plurality of waterproof leaves are arranged at the center of the one-way water inlet 24, the number of limiting top piles 28 is the same as that of the waterproof leaves, and each waterproof leaf is matched with a limiting top pile 28;

[0047] When injecting liquid into the injection pipe 15 through the injection port 16, the staff pulls the switch rod 17 to rotate and open the shielding plate 21 on the side of the injection port 16, so that the shielding plate 21 no longer has a shielding effect on the injection port 16. After the liquid medium is injected into the injection port 16, the liquid medium is transported through the injection pipe 15. After reaching the bottom end of the injection pipe 15, the liquid medium leaves the water outlet 27 and presses the one-way water inlet 24 downward by its own weight, so that the liquid medium can enter the interior of the measuring chamber 12. When performing a pressure test, when the one-way water inlet 24 is affected by the internal air pressure and folds upward, the limiting top pile 28 on the bottom of the limiting frame 25 can support the one-way water inlet 24 when it rises, to prevent the one-way water inlet 24 from opening due to the influence of air pressure, causing the internal liquid medium to flow back.

[0048] The working principle of the present invention is:

[0049] When in use, the staff injects liquid medium into the pressure-guiding pipe 7 and the bottom shell 1, and injects the detection liquid into the process pipe 10. When injecting liquid into the injection pipe 15 through the injection port 16, the staff pulls the switch pull rod 17 to rotate and open the shielding plate 21 on the side of the injection port 16. After the liquid medium is injected into the injection port 16, the liquid medium is transported through the injection pipe 15. After reaching the bottom end of the injection pipe 15, the liquid medium leaves the water outlet 27 and presses the one-way water inlet 24 downward by its own weight, so that the liquid medium can enter the interior of the measuring chamber 12. When performing a pressure test, the limiting top pile 28 on the bottom surface of the limiting frame 25 can support the one-way water inlet 24 when it rises, to prevent the one-way water inlet 24 from opening due to the influence of air pressure, resulting in the backflow of the internal liquid medium.

[0050] When the detection liquid passes through the process pipe 10, the liquid medium in the pressure-conducting pipe 7 is pushed toward the bottom shell 1 under the action of the pressure, because the liquid medium in the pressure-conducting pipe 7 will not flow back to the process pipe 10 under the action of the check valve 8. After the detection liquid pushes the liquid medium into the bottom shell 1, because the liquid medium is also injected into the measuring chamber 12 in the bottom shell 1 in advance, after receiving the pressure transmitted by the pressure-conducting pipe 7, the pressure is transmitted to the surface of the diaphragm body 13 under the action of the internal liquid medium, driving the diaphragm body 13 to deform, and converting it into an electrical signal output through the measuring circuit;

[0051] During the detection, the compensation mechanism adjusts the internal pressure environment of the air cavity 32 in real time, thereby adjusting the curvature of the diaphragm body 13 to offset the deformation of the diaphragm and the change in resistance value caused by temperature change, thereby improving the accuracy of pressure detection. The temperature in the measuring chamber 12 is detected in real time by the temperature detector 22, and the temperature signal is transmitted to the central processing unit 34 through a cable. After receiving the temperature signal, the central processing unit 34 analyzes the influence of temperature on the deformation and resistance value of the diaphragm according to a preset algorithm, calculates the pressure compensation amount that needs to be adjusted, and drives the motor 36 to move through the air plug pile 37 in the air pressure hole 39 to adjust the pressure. The air pressure in the throttle cavity 32 is isolated from the measuring chamber 12 by the diaphragm body 13. When the air pressure in the air cavity 32 changes, the diaphragm body 13 is deformed from one side to compensate for the error caused by temperature. Because the surface of the diaphragm body 13 is bent, the force point of the diaphragm body 13 changes during the pressure test, and has a more concentrated force position, thereby achieving a more accurate detection effect. The central processing unit 34 continuously receives new temperature signals and controls the air pressure in the air cavity 32 according to the actual situation, thereby adjusting the compensation amount to ensure the accuracy of pressure detection;

[0052] The cooling mechanism cools the liquid medium in the measuring chamber 12 by introducing external cold air, so as to reduce the influence on the diaphragm body 13. When in use, the temperature of the liquid medium in the measuring chamber 12 is monitored in real time by the temperature detector 22. After the temperature of the internal liquid medium is affected by the detection liquid and the temperature rises to the specified temperature, the temperature detector 22 transmits a signal to the central processor 34, and the central processor 34 sends a signal to control the small fan 29 to start, and the external cold air is sucked into the bottom shell 1 through the wind slot 6, and the cold air then enters the air duct ring 31 through the air inlet 40 on its side. The cold air flows in the air duct ring 31, and then absorbs the internal heat through the cooling ring 30, and transfers the heat to the surface of the air duct ring 31, and the heat is taken away by the cold air when passing through, so as to cool the isolation sleeve 11 and the measuring chamber 12 inside it. The cooled hot air is discharged from the bottom shell 1 through the air outlet 41, ensuring that the measuring chamber 12 and its surrounding area are maintained at a relatively low temperature level, reducing the influence of high temperature on the diaphragm material;

[0053] After the pressure detection is completed inside the bottom shell 1, the data is processed and the final data is transmitted to the pressure sensor body 3, and the staff can record the data by observing the display screen 4.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent pressure transmitter, characterized in that: include, A bottom shell (1), wherein a detection mechanism is arranged inside the bottom shell (1), an upper shell (2) is fixedly mounted on the upper surface of the bottom shell (1), a pressure sensor body (3) is fixedly mounted on the top of the upper shell (2), and a display screen (4) is provided on one side surface of the pressure sensor body (3); The detection mechanism comprises: an inner cylinder (14), the inner cylinder (14) being sleeved inside the upper shell (2), an insulating sleeve (11) being fixedly mounted on the bottom surface of the inner cylinder (14), a measuring chamber (12) for liquid pressure detection being provided on one side of the insulating sleeve (11), and a temperature detector (22) being provided inside the measuring chamber (12); The compensation mechanism comprises: a mounting frame (33), the mounting frame (33) is fixedly mounted inside the inner tube (14), a central processing unit (34) is fixedly mounted on the upper surface of the mounting frame (33), and a total signal line (35) is arranged on the upper surface of the central processing unit (34); A cooling mechanism, the cooling mechanism comprising: a cooling ring (30), the cooling ring (30) being arranged on the inner side surface of the insulating sleeve (11), the outer surface of the cooling ring (30) being sleeved with an air duct ring (31), the two side surfaces of the air duct ring (31) being further provided with an air inlet (40) and an air outlet (41), the air inlet (40) and the air outlet (41) both being in communication with the interior of the air duct ring (31); The limiting assembly comprises: a mounting frame (23), the mounting frame (23) being fixedly mounted on the bottom surface of the isolation plate (20), a limiting frame (25) being fixedly mounted on the upper surface of the mounting frame (23), and a water outlet hole (27) communicating with the liquid injection pipe (15) being provided at the center of the limiting frame (25).

2. The intelligent pressure transmitter according to claim 1, characterized in that: The side surface of the bottom shell (1) is provided with a connection port (5), the side surface of the connection port (5) is connected to a pressure-conducting pipe (7), both ends of the pressure-conducting pipe (7) are fixedly mounted with connection flanges (19), one end of the pressure-conducting pipe (7) is connected to a fixing plate (18) via the connection flange (19), the other end of the pressure-conducting pipe (7) is also provided with a check valve (8) via the connection flange (19), one side of the check valve (8) is connected to a connecting branch pipe (9), and the connecting branch pipe (9) is fixedly mounted on a side surface of the process pipeline (10).

3. The intelligent pressure transmitter according to claim 1, characterized in that: A diaphragm body (13) is arranged at the center of the isolating sleeve (11), an isolation plate (20) is also arranged inside the inner tube (14), a liquid injection pipe (15) is arranged at the center of the isolation plate (20), a side surface of the upper shell (2) is provided with an injection port (16) matching the liquid injection pipe (15), and a rotatable switch pull rod (17) is also arranged on the side surface of the upper shell (2), and a shielding plate (21) is fixedly connected to one side surface of the switch pull rod (17).

4. The intelligent pressure transmitter according to claim 1, characterized in that: A driving motor (36) is fixedly mounted on the side surface of the inner cylinder (14), a gas plug pile (37) is fixedly mounted on the end of the output shaft of the driving motor (36), a stabilizing frame (38) is sleeved on the surface of the gas plug pile (37), and the stabilizing frame (38) is fixedly mounted on the upper surface of the isolation sleeve (11).

5. The intelligent pressure transmitter according to claim 4, characterized in that: An air cavity (32) is provided on the surface of one side of the isolation sleeve (11) facing away from the measuring chamber (12); a compressed air hole (39) connected to the air cavity (32) is fixedly installed on the upper surface of the isolation sleeve (11); one end of the air plug pile (37) is located inside the compressed air hole (39); and the driving motor (36) and the temperature detector (22) are connected to the central processing unit (34) via cables.

6. The intelligent pressure transmitter according to claim 1, characterized in that: A small fan (29) is also arranged inside the bottom shell (1), the air outlet end of the small fan (29) is connected to the air inlet (40), and both side surfaces of the bottom shell (1) are provided with air slots (6) matching the small fan (29).

7. The intelligent pressure transmitter according to claim 1, characterized in that: A plurality of connecting legs (26) are fixedly mounted on the bottom surface of the limiting frame (25), the bottom surface of the connecting legs (26) is fixedly connected to the upper surface of the mounting frame (23), and a plurality of limiting top piles (28) are provided on the bottom surface of the limiting frame (25).

8. The intelligent pressure transmitter according to claim 7, characterized in that: A one-way water inlet (24) matching with the water outlet (27) is provided at the center of the mounting frame (23); a plurality of waterproof leaves are provided at the center of the one-way water inlet (24); the number of the limiting top piles (28) is the same as that of the waterproof leaves, and each waterproof leaf matches with a limiting top pile (28).

9. A temperature compensation method for an intelligent pressure transmitter, used for an intelligent pressure transmitter according to any one of claims 1 to 8, characterized in that: The method for performing temperature compensation during detection comprises the following steps: S1: pressure detection, the liquid medium enters the bottom shell (1) through the pressure guiding tube (7), pushes the diaphragm body (13) in the measuring chamber (12), and the deformation of the diaphragm body (13) is converted into an electrical signal output through the measuring circuit; S2: temperature sensing, monitoring the temperature of the liquid medium inside the measuring chamber (12) in real time through the temperature detector (22), and transmitting the data to the central processing unit (34), and processing the data through the central processing unit (34) to adjust the air pressure in the air cavity (32); S3: temperature compensation, by increasing the air pressure in the air cavity (32) to make the diaphragm body (13) bend at a specified arc, the arc of the bending is the influence range caused by the temperature, and the pressure during the test will first compensate for the specified degree of bending when acting on the diaphragm body (13), and then generate normal test data; S4: Cooling operation. When the temperature in the measuring chamber (12) exceeds a set value, the temperature detector (22) sends a signal to the central processing unit (34). The central processing unit (34) controls the small fan (29) to start, and cools the measuring chamber (12) through the air duct ring (31) and the cooling ring (30).

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