A pressure differential pressure temperature integrated sensor

Abstract

The utility model discloses a kind of pressure difference pressure temperature integrated integrated sensor, including the sensor body on installation and process pipeline, pressure sensing unit and differential pressure sensing unit are equipped in the sensor body, the pressure sensing unit is integrally integrated with the differential pressure sensing unit, the differential pressure sensing unit is used to detect the pressure difference between process pipeline high pressure side and low pressure side, and output differential pressure electric signal, the utility model integrates pressure sensing unit, differential pressure sensing unit and temperature sensing unit in the sensor body, structure is simple, signal transmission is stable, machining process is easy to operate, production yield is high, effectively solve the problem of low integration in prior art, and effectively reduce external connecting pipeline and wiring, reduce the risk of leakage and wiring fault, improve the long-term operation stability and reliability of entire measurement system.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, and more specifically, to an integrated pressure differential and temperature sensor. Background Technology

[0002] In industries such as petroleum, chemical, power, and metallurgy, it is often necessary to simultaneously monitor the pressure, differential pressure, and temperature parameters of fluids (such as gases and liquids). For example, when measuring the flow rate of a gas or liquid, differential pressure signals are typically used for calculations, while the temperature and pressure of the medium are key parameters for flow compensation and ensuring measurement accuracy.

[0003] Traditionally, temperature and pressure measurements require separate temperature and pressure sensors, which is extremely inconvenient in space-constrained environments, leading to complex installation, numerous wiring connections, and increased costs. This is especially true when multiple temperature and pressure measurements need to be taken on a pipeline; using separate sensors results in the pipeline being cluttered with sensors, and the wiring is particularly complex. This not only increases installation difficulty but also raises system costs and maintenance complexity. Furthermore, because the physical locations of pressure, differential pressure, and temperature measurement points are separate, the measured parameters are not strictly "synchronized at the same point," introducing errors during parameter compensation and affecting the final calculation accuracy (such as flow rate calculation accuracy). Utility Model Content

[0004] This invention addresses the technical problems existing in the prior art by providing an integrated pressure, differential pressure, and temperature sensor. It solves the problem of separately installing temperature and pressure sensors, which is extremely inconvenient in space-constrained environments, leading to complex installation, numerous wiring points, and increased costs. Especially when multiple temperature and pressure measurements are required on pipelines, using separate sensors results in a dense network of sensors and highly complex wiring, increasing installation difficulty, system cost, and maintenance complexity. Furthermore, because the pressure, differential pressure, and temperature measurement points are physically separated, the measured parameters are not strictly "synchronized at the same point," introducing errors during parameter compensation and affecting the final calculation accuracy (such as flow rate calculation accuracy).

[0005] To achieve the above objectives, this utility model provides an integrated pressure, differential pressure, and temperature sensor, including a sensor body installed on a process pipeline. The sensor body is provided with a pressure sensing unit and a differential pressure sensing unit, which are integrated together. The differential pressure sensing unit is used to detect the pressure difference between the high-pressure side and the low-pressure side of the process pipeline and outputs a differential pressure electrical signal. The pressure sensing unit obtains the pressure value by detecting the absolute pressure on the high-pressure side of the differential pressure sensing unit.

[0006] Preferably, the sensor body has a high-pressure chamber and a low-pressure chamber. The high-pressure chamber is connected to the high-pressure side of the process pipeline through a high-pressure tap on the sensor body, and the low-pressure chamber is connected to the low-pressure side of the process pipeline through a low-pressure tap on the sensor body.

[0007] Preferably, the differential pressure sensing unit is connected to the high-pressure chamber via a high-pressure side sensing diaphragm, and the differential pressure sensing unit is connected to the low-pressure chamber via a low-pressure side sensing diaphragm.

[0008] Preferably, the sensor body is provided with a temperature sensing unit, which includes a temperature sensor probe. The probe extends directly into the process pipeline through a temperature measuring sleeve and comes into direct contact with the medium being measured. The temperature measuring sleeve is fixed to the sensor body through a threaded connector.

[0009] Preferably, the sensor body also includes a signal processing circuit, which is located in the circuit compartment inside the sensor body and is electrically connected to the pressure sensing unit, differential pressure sensing unit, and temperature sensing unit, respectively. The signal processing circuit is used to receive and process the differential pressure electrical signal, pressure electrical signal, and temperature electrical signal, and output the processed data through a unified signal output interface, which is an RS-digital signal output.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The pressure sensing unit, differential pressure sensing unit, and temperature sensing unit are integrated into the sensor body, resulting in a simple structure, stable signal transmission, easy machining process, and high production yield. This effectively solves the problem of low integration in existing technologies, and effectively reduces external connection pipelines and wiring, lowers the risk of leakage and wiring failure, and improves the long-term operational stability and reliability of the entire measurement system.

[0011] 2. By closely locating the temperature measurement point and the pressure measurement point, almost "same-point" measurement is achieved, eliminating the compensation error caused by the separation of measurement points and significantly improving the accuracy of multi-parameter joint calculation.

[0012] 3. The integrated structural design reduces potential interference to signals during long-distance transmission, while internal signal processing ensures the quality of the output signal. It is particularly suitable for differential pressure and temperature measurement under high static pressure conditions, such as in industrial applications like high-pressure steam, oil and gas fields, and chemical reactors. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the shaft-mounted sensor body of this utility model.

[0014] The meanings of the labels in the diagram are as follows: 1. Process piping; 2. Sensor body; 201. High-pressure chamber; 202. Low-pressure chamber; 3. Pressure sensing unit; 4. Differential pressure sensing unit; 5. Temperature sensing unit; 6. Signal processing circuit. Detailed Implementation

[0015] 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.

[0016] Please see Figures 1-2 This embodiment provides an integrated pressure differential and temperature sensor, including a sensor body 2 installed on a process pipeline 1. The sensor body 2 has a high-pressure chamber 201 and a low-pressure chamber 202. The high-pressure chamber 201 is connected to the high-pressure side of the process pipeline 1 through a high-pressure port on the sensor body 2, and the low-pressure chamber 202 is connected to the low-pressure side of the process pipeline 1 through a low-pressure port on the sensor body 2. A differential pressure sensing unit 4 is fixedly installed in the sensor body 2, with its high-pressure side sensing diaphragm connected to the high-pressure chamber 201 and its low-pressure side sensing diaphragm connected to the low-pressure chamber 202. It is used to detect the pressure difference between the high-pressure side and the low-pressure side and output a differential pressure electrical signal. The pressure sensing unit 3 and the differential pressure sensing unit 4 are integrated, and the pressure value is obtained by detecting the absolute pressure on the high-pressure side of the differential pressure sensing unit 4.

[0017] In summary, the improvement of this embodiment lies in: The pressure sensing unit 3, differential pressure sensing unit 4, and temperature sensing unit 5 are integrated into the sensor body 2, resulting in a simple structure, stable signal transmission, easy machining process, and high production yield. This effectively solves the problem of low integration in existing technologies and reduces external connection pipelines and wiring, lowering the risk of leakage and wiring failures, and improving the long-term operational stability and reliability of the entire measurement system. By closely locating the temperature measurement point and the pressure measurement point, almost "same-point" measurement is achieved, eliminating compensation errors caused by the separation of measurement points and significantly improving the accuracy of multi-parameter joint calculation.

[0018] Based on the above, other structures also need to be disclosed in detail, such as: Please see Figure 2The sensor body 2 is equipped with a temperature sensing unit 5, which includes a temperature sensor probe. The probe extends directly into the process pipeline 1 through a temperature measuring sleeve (501) and comes into direct contact with the measured medium. The temperature measuring sleeve is fixed to the sensor body 2 through a threaded connector, so that the temperature measurement point and the pressure measurement point are located on the same device, achieving close physical proximity.

[0019] Please see Figure 2 The sensor body 2 has a circuit compartment inside, and the signal processing circuit 6 is located in the circuit compartment. It is electrically connected to the pressure sensing unit 3, the differential pressure sensing unit 4, and the temperature sensing unit 5 respectively. The signal processing circuit 6 is used to receive and process the differential pressure signal, the pressure signal, and the temperature signal, and output the processed data through a unified RS-485 digital signal output interface.

[0020] In summary, the working principle of this solution is as follows: When the fluid pressure in process pipeline 1 enters high-pressure chamber 201 and low-pressure chamber 202 through high-pressure and low-pressure inlets respectively, the high-pressure side sensing diaphragm of differential pressure sensing unit 4 is subjected to the pressure of high-pressure chamber 201, and the low-pressure side sensing diaphragm is subjected to the pressure of low-pressure chamber 202. By detecting the pressure difference between the two sides, differential pressure sensing unit 4 outputs a differential pressure electrical signal. At the same time, pressure sensing unit 3 is integrated with differential pressure sensing unit 4. By detecting the absolute pressure on the high-pressure side of differential pressure sensing unit 4, it obtains the pressure value in process pipeline 1 and outputs a pressure electrical signal. The temperature sensor probe of temperature sensing unit 5 is in direct contact with the medium in process pipeline 1 through a temperature measuring sleeve to measure the temperature of the medium in real time and outputs a temperature electrical signal. Signal processing circuit 6 receives and processes differential pressure electrical signal, pressure electrical signal, and temperature electrical signal, performs signal amplification, filtering, compensation, and other processing, and outputs the processed data to the control system through RS-485 digital signal output interface. Because the physical locations of the pressure (differential pressure and static pressure) and temperature measurement points are very close, almost "same-point" measurement is achieved, effectively eliminating the compensation error caused by the separation of measurement points in split-type measurement, and significantly improving the accuracy of multi-parameter joint calculation.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure differential and temperature integrated sensor, comprising a sensor body (2) mounted on a process pipeline (1), characterized in that: The sensor body (2) is provided with a pressure sensing unit (3) and a differential pressure sensing unit (4). The pressure sensing unit (3) and the differential pressure sensing unit (4) are integrated. The differential pressure sensing unit (4) is used to detect the pressure difference between the high-pressure side and the low-pressure side of the process pipeline (1) and output a differential pressure electrical signal. The pressure sensing unit (3) obtains the pressure value by detecting the absolute pressure on the high-pressure side of the differential pressure sensing unit (4).

2. The integrated pressure differential and temperature sensor according to claim 1, characterized in that: The sensor body (2) has a high-pressure chamber (201) and a low-pressure chamber (202). The high-pressure chamber (201) is connected to the high-pressure side of the process pipeline (1) through a high-pressure port on the sensor body (2). The low-pressure chamber (202) is connected to the low-pressure side of the process pipeline (1) through a low-pressure port on the sensor body (2).

3. The integrated pressure differential and temperature sensor according to claim 2, characterized in that: The differential pressure sensing unit (4) is connected to the high-pressure chamber (201) through the high-pressure side sensing diaphragm, and the differential pressure sensing unit (4) is connected to the low-pressure chamber (202) through the low-pressure side sensing diaphragm.

4. The integrated pressure differential and temperature sensor according to claim 3, characterized in that: The sensor body (2) is provided with a temperature sensing unit (5). The temperature sensing unit (5) includes a temperature sensor probe. The probe extends directly into the process pipeline (1) through a temperature measuring sleeve and is in direct contact with the measured medium. The temperature measuring sleeve is fixed to the sensor body (2) through a threaded connector.

5. The integrated pressure differential and temperature sensor according to claim 4, characterized in that: The sensor body (2) is also provided with a signal processing circuit (6). The signal processing circuit (6) is located in the circuit compartment inside the sensor body (2) and is electrically connected to the pressure sensing unit (3), the differential pressure sensing unit (4) and the temperature sensing unit (5) respectively. The signal processing circuit (6) is used to receive and process the differential pressure signal, the pressure signal and the temperature signal, and output the processed data through a unified signal output interface. The signal output interface is an RS-485 digital signal output.

Images