Digital pressure transmitter

Abstract

The utility model discloses a kind of digital display pressure transmitter, it is related to pressure transmitter technical field, including installation through pipe, still include: first detection channel is arranged in the top surface one side of installation through pipe throughly setting up. The utility model through the setting of first detection channel and second detection channel, when using, the medium of first detection channel and second detection channel simultaneously pressurizes first isolation diaphragm and second isolation diaphragm, by inert filling liquid transmission to first pressure sensor and second pressure sensor, control circuit board carries out acquisition, amplification, analog-digital conversion, calculation comparison etc. to the electric signal transmission of first pressure sensor and second pressure sensor, when two groups of data are inconsistent, it indicates that pressure transmitter exists measurement deviation, sensor fault etc. abnormal situation, control circuit board transmits signal to PLC controller, control siren sends alarm, reminds staff to maintain or calibrate, to ensure the accuracy and reliability of measurement.

Description

Technical Field

[0001] This utility model relates to the field of pressure transmitter technology, specifically a digital display pressure transmitter. Background Technology

[0002] A pressure transmitter is a device that converts pressure into pneumatic or electrical signals for control and remote transmission. It transforms the physical pressure parameters of gases, liquids, etc., sensed by pressure sensors into standard electrical signals, which are then supplied to secondary instruments such as indicators, alarms, recorders, and controllers for measurement, indication, and process regulation.

[0003] The utility model patent with announcement number CN222717740U discloses a digital display pressure transmitter. Although this utility model provides an intelligent digital display pressure transmitter, through the design of the transmitter housing with an opening, after the circuit board is installed into the housing, the display screen is installed and then potted and sealed. This process realizes the display and sealing of the transmitter, so that the transmitter's detection data can be monitored intuitively in real time, making the data acquisition fast and accurate.

[0004] However, this intelligent digital pressure transmitter is not convenient for comparing the collected data. The single-channel design can only collect one set of pressure data, making it difficult for personnel to detect whether the data is inaccurate or erroneous, thus affecting accuracy. In addition, it is not convenient to perform online calibration of the transmitter. The transmitter needs to be disassembled for calibration, and then reinstalled after calibration, which is cumbersome and requires shutdown for maintenance, affecting its use. Utility Model Content

[0005] This invention provides a digital display pressure transmitter to solve the problems mentioned in the background art, such as the single-channel design only being able to collect one set of pressure data, making it difficult for personnel to detect whether the data is inaccurate or erroneous, and making it inconvenient to perform online calibration of the transmitter, requiring shutdown for maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a digital display pressure transmitter, comprising an installation pipe, and further comprising: a first detection channel extending through one side of the top surface of the installation pipe, and a second detection channel extending through the other side of the top surface of the installation pipe; a first pressure sensor fixedly mounted on the top of the inner wall of the first detection channel, and a second pressure sensor fixedly mounted on the top of the inner wall of the second detection channel; a control circuit board electrically connected to one side of both the first and second pressure sensors; a top cover disposed on the top of the first and second detection channels, a housing fixedly mounted on the top surface of the top cover, a display screen fixedly mounted on one side of the housing, and an alarm fixedly mounted on the top surface of the housing; and a calibration channel disposed at the bottom of the outer surface of the first and second detection channels, one end of which is threadedly connected to a pressure signal generator.

[0007] As a preferred embodiment of this utility model, a first isolation diaphragm is fixedly provided on the inner wall of the first detection channel, and a second isolation diaphragm is fixedly provided on the inner wall of the second detection channel. The first and second isolation diaphragms are used to squeeze the inert filling liquid.

[0008] As a preferred embodiment of this utility model, the control circuit board is fixedly installed inside the housing, and one side of the control circuit board is electrically connected to the display screen. The control circuit board is used to control and process signal data.

[0009] As a preferred embodiment of this utility model, a PLC controller is electrically connected to one side of the control circuit board, and the PLC controller is electrically connected to the alarm on one side. The PLC controller is used to receive signals from the control circuit board and control the operation of the alarm.

[0010] As a preferred embodiment of this utility model, a control valve is fixedly installed on the top surface of the calibration channel, and an anti-slip sleeve is fitted onto the surface of the control valve. The control valve is used to control the opening and closing of the calibration channel.

[0011] As a preferred technical solution of this utility model, both sides of the top surface of the top cover are threaded with connecting screws, and the top surfaces of the first detection channel and the second detection channel are provided with threaded holes that are compatible with the connecting screws. The connecting screws are used to fix the top cover.

[0012] As a preferred embodiment of this invention, the space between the first isolation diaphragm, the first pressure sensor, the second isolation diaphragm, and the second pressure sensor is filled with an inert filling fluid, which facilitates pressure transmission.

[0013] Compared with the prior art, this utility model provides a digital display pressure transmitter, which has the following advantages:

[0014] 1. This digital pressure transmitter, through the setting of a first detection channel and a second detection channel, allows the medium in the first and second detection channels to simultaneously pressurize the first and second isolation diaphragms during use. The pressure is transmitted to the first and second pressure sensors through the inert filling fluid. The control circuit board collects, amplifies, converts analog to digital, calculates and compares the electrical signals transmitted by the first and second pressure sensors. When the two sets of data are inconsistent, it indicates that the pressure transmitter has abnormal conditions such as measurement deviation or sensor failure. The control circuit board sends a signal to the PLC controller to control the alarm to sound an alarm, reminding the staff to perform maintenance or calibration, thereby ensuring the accuracy and reliability of the measurement.

[0015] 2. This digital display pressure transmitter, through the setting of calibration channel and pressure signal generator, connects the pressure signal generator to the calibration channel in case of abnormality. The pressure signal generator can apply an accurate and known standard pressure signal, and the opening and closing control valve sequentially calibrates the first detection channel and the second detection channel respectively, achieving the effect of online calibration without stopping the transmitter to disassemble it, which is convenient for maintenance and use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the control circuit board structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the calibration channel structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the first and second detection channels of this utility model;

[0020] Figure 5 This is a schematic diagram of the outer shell structure of this utility model.

[0021] In the diagram: 1. Installation pipe; 2. First detection channel; 3. Second detection channel; 4. First pressure sensor; 5. Second pressure sensor; 6. Control circuit board; 7. Top cover; 8. Housing; 9. Display screen; 10. Alarm; 11. Calibration channel; 12. Pressure signal generator; 13. First isolation diaphragm; 14. Second isolation diaphragm; 15. Control valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5This utility model discloses a digital display pressure transmitter, including a mounting pipe 1, and further comprising: a first detection channel 2 extending through one side of the top surface of the mounting pipe 1, and a second detection channel 3 extending through the other side of the top surface of the mounting pipe 1; a first pressure sensor 4 fixedly mounted on the top of the inner wall of the first detection channel 2, and a second pressure sensor 5 fixedly mounted on the top of the inner wall of the second detection channel 3; both the first pressure sensor 4 and the second pressure sensor 5 are electrically connected to a control circuit board 6 on one side; through the arrangement of the first detection channel 2 and the second detection channel 3, during use, the first detection channel 2 and the second pressure sensor 5... The medium in measuring channel 3 simultaneously pressurizes the first isolation diaphragm 13 and the second isolation diaphragm 14, which are then transmitted to the first pressure sensor 4 and the second pressure sensor 5 through the inert filling fluid. The control circuit board 6 collects, amplifies, performs analog-to-digital conversion, calculates and compares the electrical signals transmitted by the first pressure sensor 4 and the second pressure sensor 5. When the two sets of data are inconsistent, it indicates that the pressure transmitter has abnormal conditions such as measurement deviation or sensor failure. The control circuit board 6 transmits a signal to the PLC controller, which controls the alarm 10 to sound an alarm, reminding the staff to perform maintenance or calibration, thereby ensuring the accuracy and reliability of the measurement.

[0024] A top cover 7 is installed at the top of the first detection channel 2 and the second detection channel 3. A housing 8 is fixedly installed on the top surface of the top cover 7. A display screen 9 is fixedly installed on one side of the housing 8. An alarm 10 is fixedly installed on the top surface of the housing 8. A calibration channel 11 is installed at the bottom of the outer surface of the first detection channel 2 and the second detection channel 3. A pressure signal generator 12 is threaded to one end of the calibration channel 11. Through the setting of the calibration channel 11 and the pressure signal generator 12, when an abnormality occurs, the pressure signal generator 12 is connected to the calibration channel 11. The pressure signal generator 12 can apply an accurate and known standard pressure signal, and the opening and closing control valve 15 is used to calibrate the first detection channel 2 and the second detection channel 3 respectively, achieving the effect of online calibration without stopping the machine to disassemble the transmitter, which is convenient for maintenance and use.

[0025] Specifically, a first isolation diaphragm 13 is fixedly installed on the inner wall of the first detection channel 2, and a second isolation diaphragm 14 is fixedly installed on the inner wall of the second detection channel 3.

[0026] In this embodiment, the medium in the first detection channel 2 and the second detection channel 3 simultaneously pressurizes the first isolation diaphragm 13 and the second isolation diaphragm 14, and transmits the pressure to the first pressure sensor 4 and the second pressure sensor 5 through the inert filling liquid.

[0027] Specifically, the control circuit board 6 is fixedly installed inside the housing 8, and one side of the control circuit board 6 is electrically connected to the display screen 9.

[0028] In this implementation scheme, the control circuit board 6 collects, amplifies, performs analog-to-digital conversion, calculates and compares the electrical signals transmitted by the first pressure sensor 4 and the second pressure sensor 5, and displays the data on the display screen 9.

[0029] Specifically, a PLC controller is electrically connected to one side of the control circuit board 6, and the PLC controller is electrically connected to the alarm 10 on one side.

[0030] In this implementation scheme, the control circuit board 6 transmits signals to the PLC controller, which controls the alarm 10 to sound an alarm, reminding staff to perform maintenance or calibration.

[0031] Specifically, a control valve 15 is fixedly installed on the top surface of the calibration channel 11, and an anti-slip sleeve is fitted onto the surface of the control valve 15.

[0032] In this embodiment, control valve 15 is used to control the opening and closing of calibration channel 11.

[0033] Specifically, both sides of the top surface of the top cover 7 are threaded with connecting screws, and the top surfaces of the first detection channel 2 and the second detection channel 3 are provided with threaded holes that are compatible with the connecting screws.

[0034] In this embodiment, the connecting screws are used to fix the top cover 7.

[0035] Specifically, the space between the first isolation diaphragm 13, the first pressure sensor 4, the second isolation diaphragm 14, and the second pressure sensor 5 is filled with an inert filling fluid.

[0036] In this implementation scheme, the inert filling fluid facilitates pressure transmission.

[0037] The pressure signal generator 12 is model number: Changyi YFQ-016S. The above parameters and model can be selected according to the actual situation.

[0038] The working principle and usage process of this utility model are as follows: During use, the medium in the first detection channel 2 and the second detection channel 3 simultaneously pressurizes the first isolation diaphragm 13 and the second isolation diaphragm 14, which are transmitted to the first pressure sensor 4 and the second pressure sensor 5 through the inert filling liquid. The control circuit board 6 collects, amplifies, converts analog to digital, calculates and compares the electrical signals transmitted by the first pressure sensor 4 and the second pressure sensor 5, and displays the data on the display screen 9.

[0039] When the two sets of data are inconsistent, it indicates that the pressure transmitter has abnormal conditions such as measurement deviation or sensor failure. The control circuit board 6 transmits a signal to the PLC controller, which controls the alarm 10 to sound an alarm, reminding the staff to perform maintenance or calibration, thereby ensuring the accuracy and reliability of the measurement.

[0040] In case of an abnormality, the pressure signal generator 12 is connected to the calibration channel 11. The pressure signal generator 12 can apply an accurate and known standard pressure signal. The opening and closing control valve 15 is used to calibrate the first detection channel 2 and the second detection channel 3 in sequence, achieving the effect of online calibration. There is no need to stop the machine to disassemble the transmitter, which is convenient for maintenance and use.

[0041] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A digital display pressure transmitter, comprising an installation conduit (1), characterized in that, Also includes: A first detection channel (2) is provided through one side of the top surface of the installation pipe (1), and a second detection channel (3) is provided through the other side of the top surface of the installation pipe (1). A first pressure sensor (4) is fixedly installed on the top of the inner wall of the first detection channel (2), and a second pressure sensor (5) is fixedly installed on the top of the inner wall of the second detection channel (3). A control circuit board (6) is electrically connected to one side of both the first pressure sensor (4) and the second pressure sensor (5). A top cover (7) is set on the top of the first detection channel (2) and the second detection channel (3). A housing (8) is fixedly set on the top surface of the top cover (7). A display screen (9) is fixedly installed on one side of the housing (8). An alarm (10) is fixedly installed on the top surface of the housing (8). A calibration channel (11) is provided at the bottom of the outer surface of the first detection channel (2) and the second detection channel (3), and a pressure signal generator (12) is threaded to one end of the calibration channel (11).

2. The digital display pressure transmitter according to claim 1, characterized in that: The inner wall of the first detection channel (2) is fixedly provided with a first isolation diaphragm (13), and the inner wall of the second detection channel (3) is fixedly provided with a second isolation diaphragm (14).

3. The digital display pressure transmitter according to claim 1, characterized in that: The control circuit board (6) is fixedly installed inside the housing (8), and one side of the control circuit board (6) is electrically connected to the display screen (9).

4. A digital display pressure transmitter according to claim 1, characterized in that: One side of the control circuit board (6) is electrically connected to a PLC controller, and one side of the PLC controller is electrically connected to an alarm (10).

5. A digital display pressure transmitter according to claim 1, characterized in that: A control valve (15) is fixedly installed on the top surface of the calibration channel (11), and an anti-slip sleeve is fitted on the surface of the control valve (15).

6. A digital display pressure transmitter according to claim 1, characterized in that: Both sides of the top surface of the top cover (7) are threaded with connecting screws, and the top surfaces of the first detection channel (2) and the second detection channel (3) are provided with threaded holes that are compatible with the connecting screws.

7. A digital display pressure transmitter according to claim 2, characterized in that: The space between the first isolation diaphragm (13), the first pressure sensor (4), the second isolation diaphragm (14), and the second pressure sensor (5) is filled with an inert filling fluid.

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