Monocrystalline silicon double-flange remote differential pressure transmitter

Abstract

The utility model relates to the technical field of industrial automatic measurement, in particular to a monocrystalline silicon double-flange remote differential pressure transmitter, which comprises a main body, and a transmitter assembly is fixedly connected to the top of the main body. According to the utility model, the monocrystalline silicon differential pressure sensor is used as a core measuring element of the transmitter, the transmitter has high precision, high stability and good linearity, the working principle of the transmitter is based on the piezoresistive effect of monocrystalline silicon, when differential pressure acts on the pressure sensing diaphragm of the sensor, the diaphragm is slightly deformed, and the strain resistance value is changed, so that the pressure sensing diaphragm of the sensor can be accurately measured. The signal processing circuit amplifies and filters weak signals output by the monocrystalline silicon differential pressure sensor, the remote transmission sealing capillary tube is made of stainless steel and has good pressure resistance and corrosion resistance, the pressure of a measured medium can be transmitted to the monocrystalline silicon differential pressure sensor, and the pressure of the measured medium can be further changed. The length of the remote transmission sealing capillary tube is a specified length, so that lagging and errors in the pressure transmission process are reduced.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation measurement technology, specifically a single-crystal silicon dual-flange remote differential pressure transmitter. Background Technology

[0002] In modern industrial production, many processes require precise control and real-time monitoring of fluid parameters such as flow rate, pressure, and level. Differential pressure measurement, as a direct and reliable measurement method, can provide crucial data support for these processes. Energy saving and efficiency optimization through differential pressure measurement can help optimize energy use efficiency. For example, by accurately measuring the flow rate of steam, liquid, or gas, equipment operating parameters can be adjusted, thereby reducing energy consumption and improving production efficiency.

[0003] In critical processes such as chemical, pharmaceutical, and food industries, differential pressure measurement is used to monitor pipeline pressure, prevent liquid leaks and equipment overpressure operation, thereby ensuring production safety and avoiding potential accident risks. In short, differential pressure measurement is of paramount importance in industrial production. It not only provides accurate data support for process control but also ensures production safety, optimizes energy efficiency, and reduces operating costs. With the continuous development of industrial automation technology, the functions of differential pressure transmitters are constantly being optimized, providing more reliable and efficient measurement solutions for industrial production.

[0004] Traditional differential pressure transmitters may experience inaccurate measurements and frequent maintenance when operating under special conditions, such as measuring corrosive, high-viscosity, easily crystallizing, or media containing suspended particles. Furthermore, some existing remote differential pressure transmitters still require further optimization in terms of structural design, signal transmission stability, and long-term operational reliability. Therefore, a single-crystal silicon dual-flange remote differential pressure transmitter is needed to address these issues. Utility Model Content

[0005] To address the issues that traditional differential pressure transmitters may encounter inaccurate measurements and frequent maintenance when operating under special conditions, such as measuring corrosive, high-viscosity, easily crystallizing, or media containing suspended particles, and to further optimize the structural design, signal transmission stability, and long-term operational reliability of some existing remote differential pressure transmitters, this invention aims to provide a single-crystal silicon dual-flange remote differential pressure transmitter to solve the problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A single-crystal silicon dual-flange remote differential pressure transmitter includes a main body, on the top of which a transmitter assembly is fixedly connected;

[0008] The main body includes a pipe, with an upper flange at the top and a lower flange at the bottom.

[0009] The transmitter assembly includes a mounting base, inside which a remote-controlled sealed capillary tube is installed, a single-crystal silicon differential pressure sensor is fixedly connected to the side of the mounting base, and an electronic cavity is fixedly connected to the side of the mounting base.

[0010] As a preferred embodiment of this utility model, the electronic cavity is made of cast aluminum, and signal processing circuits and electronic components are installed inside the electronic cavity.

[0011] As a preferred embodiment of this utility model, the signal processing circuit employs a high-precision analog circuit and a digital signal processor.

[0012] As a preferred embodiment of this utility model, the remote sealing capillary tube is made of stainless steel.

[0013] As a preferred embodiment of this utility model, a first sealing gasket is provided inside the upper flange, and a second sealing gasket is provided inside the lower flange.

[0014] As a preferred embodiment of this utility model, the upper flange has a first through hole inside, and the lower flange has a second through hole inside.

[0015] As a preferred embodiment of this utility model, a nut is provided at the top of the first through hole, and a threaded rod is provided inside the second through hole, the threaded rod extending into the interior of the first through hole, and the nut is threadedly connected to the threaded rod.

[0016] As a preferred embodiment of this utility model, four first and two through holes are provided, and four nuts and threaded rods are provided.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. In this utility model, a single-crystal silicon differential pressure sensor is used as the core measuring element of the transmitter, which has high precision, high stability, and good linearity. Its working principle is based on the piezoresistive effect of single-crystal silicon. When differential pressure acts on the pressure-sensing diaphragm of the sensor, the diaphragm undergoes slight deformation, causing a change in the strain resistance value, which in turn changes the output signal of the sensor. The sensor adopts advanced microelectromechanical systems manufacturing technology, which has high sensitivity and anti-interference capability. The signal processing circuit amplifies and filters the weak signal output by the single-crystal silicon differential pressure sensor. Through high-precision analog circuits and digital signal processors, the accuracy and stability of the signal are ensured, improving the measurement accuracy and reliability of the transmitter. The use of a single-crystal silicon differential pressure sensor results in high measurement accuracy and good long-term stability, and can maintain accurate measurement results over a wide temperature range. The advanced algorithms and self-diagnostic functions of the signal processing circuit improve the reliability and maintenance convenience of the transmitter and reduce the cost of use.

[0019] 2. In this utility model, the remote transmission sealing capillary is made of stainless steel, which has good pressure resistance and corrosion resistance, and can transmit the pressure of the measured medium to the single crystal silicon differential pressure sensor. The length of the remote transmission sealing capillary is a specified length to reduce lag and error in the pressure transmission process. The electronic cavity is made of cast aluminum, which has good heat dissipation and protection performance, and can adapt to harsh industrial environmental conditions. The high protection level of the electronic cavity enhances the environmental adaptability of the transmitter and ensures stable operation under harsh conditions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the transmitter assembly structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the upper flange structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the lower flange structure of this utility model.

[0024] In the diagram: 1. Main body; 101. Pipe; 102. Upper flange; 103. Lower flange; 104. First sealing gasket; 105. Second sealing gasket; 106. First perforation; 107. Second perforation; 108. Nut; 109. Threaded rod; 2. Transmitter assembly; 201. Mounting base; 202. Remote transmission sealing capillary tube; 203. Monocrystalline silicon differential pressure sensor; 204. Electronic cavity. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] For examples, please refer to Figures 1-4 This utility model provides a technical solution:

[0027] A single-crystal silicon dual-flange remote differential pressure transmitter includes a main body 1, with a transmitter assembly 2 fixedly connected to the top of the main body 1.

[0028] In this embodiment, as Figure 1 and Figure 2 As shown, the main body 1 includes a pipe 101, with an upper flange 102 at the top and a lower flange 103 at the bottom. The transmitter assembly 2 includes a mounting base 201, with a remote-transmission sealing capillary tube 202 installed inside the mounting base 201. A single-crystal silicon differential pressure sensor 203 is fixedly connected to the side of the mounting base 201, and an electronic cavity 204 is also fixedly connected to the side of the mounting base 201. The single-crystal silicon differential pressure sensor 203 is used as the core measuring element of the transmitter, which has high precision, high stability, and good linearity. Its working principle is based on the piezoresistive effect of single-crystal silicon. When the differential pressure acts on the pressure-sensing diaphragm of the sensor, the diaphragm undergoes a slight deformation, causing a change in the strain resistance value, which in turn changes the output signal of the sensor. The sensor adopts advanced microelectromechanical systems manufacturing technology and has high sensitivity and anti-interference capability. The signal processing circuit amplifies and filters the weak signal output by the single-crystal silicon differential pressure sensor 203.

[0029] The electronic cavity 204 is made of cast aluminum and houses signal processing circuits and electronic components. The signal processing circuits employ high-precision analog circuits and digital signal processors. The remote transmission sealed capillary 202 is made of stainless steel, which provides excellent pressure resistance and corrosion resistance, enabling the transmission of the pressure of the measured medium to the single-crystal silicon differential pressure sensor 203. The length of the remote transmission sealed capillary 202 is specified to reduce hysteresis and errors during pressure transmission. The electronic cavity 204, made of cast aluminum, provides excellent heat dissipation and protection, enabling it to adapt to harsh industrial environments. The high protection level of the electronic cavity 204 enhances the transmitter's environmental adaptability and ensures stable operation under harsh conditions.

[0030] In this embodiment, as Figure 1 , Figure 3 and Figure 4As shown, the upper flange 102 has a first sealing gasket 104 inside, and the lower flange 103 has a second sealing gasket 105 inside. The upper flange 102 has a first through hole 106 inside, and the lower flange 103 has a second through hole 107 inside. A nut 108 is provided at the top of the first through hole 106, and a threaded rod 109 is provided inside the second through hole 107. The threaded rod 109 extends into the interior of the first through hole 106, and the nut 108 is threadedly connected to the threaded rod 109. There are four first through holes 106 and two through holes 107, and four nuts 108 and threaded rods 109. The upper flange 102 and lower flange 103 are respectively installed at the upper and lower ends of the measured pipeline 101 for process connection. The sealing gaskets inside the flanges ensure the sealing during the measurement process and prevent media leakage. The double flange structure design is suitable for various complex working conditions, effectively avoiding direct corrosion and blockage of the transmitter body by the measured medium, and extending the service life of the transmitter.

[0031] The working process of this utility model is as follows: When using the single-crystal silicon dual-flange remote differential pressure transmitter designed in this scheme, in practical applications, the two flanges are respectively installed on the measured pipeline 101 and connected by threaded rods 109 and nuts 108 for tight fixing. It is essential to ensure that the first sealing gasket 104 and the second sealing gasket 105 are installed correctly to achieve a good sealing effect. The pressure of the measured medium acts on the inner sides of the upper flange 102 and the lower flange 103, respectively, and is transmitted to the single-crystal silicon differential pressure sensor 203 through the remote sealing capillary tube 202. The single-crystal silicon differential pressure sensor 203 converts the sensed differential pressure signal into a corresponding electrical signal. This electrical signal undergoes a series of processing steps by the signal processing circuit and is converted into a standard industrial signal output for reception and processing by downstream instruments or control systems. During signal processing, the signal processing circuit precisely amplifies and filters the sensor output signal to remove noise interference. Furthermore, the digital signal processor in the signal processing circuit also performs linearization processing on the signal to ensure a good linear relationship between the transmitter's output signal and the measured differential pressure, improving measurement accuracy.

[0032] 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 single-crystal silicon dual-flange remote differential pressure transmitter, comprising a main body (1), characterized in that: A transmitter assembly (2) is fixedly connected to the top of the main body (1); The main body (1) includes a pipe (101), the top of the pipe (101) is provided with an upper flange (102), and the bottom of the pipe (101) is provided with a lower flange (103). The transmitter assembly (2) includes a mounting base (201), inside which a remote sealing capillary tube (202) is installed, a single-crystal silicon differential pressure sensor (203) is fixedly connected to the side of the mounting base (201), and an electronic cavity (204) is fixedly connected to the side of the mounting base (201).

2. The single-crystal silicon dual-flange remote differential pressure transmitter according to claim 1, characterized in that, The electronic cavity (204) is made of cast aluminum, and signal processing circuits and electronic components are installed inside the electronic cavity (204).

3. The single-crystal silicon dual-flange remote differential pressure transmitter according to claim 2, characterized in that, The signal processing circuit employs high-precision analog circuitry and a digital signal processor.

4. The single-crystal silicon dual-flange remote differential pressure transmitter according to claim 1, characterized in that, The remote sealing capillary tube (202) is made of stainless steel.

5. The single-crystal silicon dual-flange remote differential pressure transmitter according to claim 1, characterized in that, The upper flange (102) is provided with a first sealing gasket (104), and the lower flange (103) is provided with a second sealing gasket (105).

6. The single-crystal silicon dual-flange remote differential pressure transmitter according to claim 1, characterized in that, The upper flange (102) has a first through hole (106) inside, and the lower flange (103) has a second through hole (107) inside.

7. The single-crystal silicon dual-flange remote differential pressure transmitter according to claim 6, characterized in that, A nut (108) is provided at the top of the first through hole (106), and a threaded rod (109) is provided inside the second through hole (107). The threaded rod (109) extends into the interior of the first through hole (106), and the nut (108) is threadedly connected to the threaded rod (109).

8. The single-crystal silicon dual-flange remote differential pressure transmitter according to claim 7, characterized in that, The first through hole (106) and the second through hole (107) are provided in four places, and the nut (108) and the threaded rod (109) are provided in four places.

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