Pressure and temperature transmitter

Abstract

The utility model discloses a pressure and temperature transmitter comprising a housing assembly, the housing assembly comprises a stainless steel housing, a stainless steel glass glaze sintering pedestal arranged on the bottom surface of the stainless steel housing, and a stainless steel pedestal welded with the stainless steel housing; and a pressure and temperature transmitting assembly. According to the utility model, the shell assembly and the pressure and temperature loosening assembly are matched with each other, the MEMS electronic pressure and temperature sensor is adopted, the temperature sensor is in direct contact with measured gas, the pressure value and the temperature value are directly converted in the MEMS electronic pressure and temperature sensor and are output in the form of digital signals, the anti-interference performance is strong, the precision is high, and the measurement precision is high. Peripheral electronic components and cost are reduced; the MEMS electronic pressure and temperature sensor is welded on the matched stainless steel glass sintering base and is pressed into the transmitter base, so that the electrical connection performance is met, and the sealing performance is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of transmitters, in particular to a pressure and temperature transmitter. Background Art

[0002] The existing temperature and pressure transmitters generally use stainless steel diffused silicon pressure sensors for pressure measurement. The pressure sensors with analog signal output require amplifier chips and analog-to-digital conversion chips, which are easily interfered with and have high costs. Due to the pressure sensor, the temperature sensor can only be installed inside the pressure sensor or on the chip board for pressure sampling. Due to the isolation of the pressure sensor, the temperature sensor cannot directly contact the measured gas and cannot accurately measure the gas temperature. It is also easily affected by the external ambient temperature, resulting in large temperature measurement errors. Summary of the invention

[0003] Therefore, the purpose of the utility model is to provide a pressure and temperature transmitter. Through the mutual cooperation of the shell component and the pressure and temperature transmitter component, a MEMS electronic pressure and temperature sensor is adopted. The temperature sensor is in direct contact with the measuring gas. The pressure value and temperature value are directly converted inside the MEMS electronic pressure and temperature sensor and output as a digital signal. It has strong anti-interference performance and high precision, and reduces peripheral electronic components and costs. The MEMS electronic pressure and temperature sensor is welded on the matching stainless steel glass sintered base and pressed into the transmitter base, which satisfies the electrical connection performance and ensures the sealing performance.

[0004] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: a pressure and temperature transmitter, comprising:

[0005] A shell assembly, the shell assembly comprising a stainless steel shell, a stainless steel glass glaze sintered base arranged on the bottom surface of the stainless steel shell, and a stainless steel base welded to the stainless steel shell;

[0006] A pressure and temperature transmitter assembly includes a metal waterproof aviation plug arranged on the top of the stainless steel shell, an electronic circuit board arranged in the stainless steel shell, and a MEMS electronic pressure and temperature sensor arranged in the stainless steel glass glaze sintered base.

[0007] As a preferred solution of the pressure and temperature transmitter described in the utility model, the metal waterproof aviation plug is installed on the stainless steel housing, and the socket of the electronic circuit board is connected to the metal waterproof aviation plug by a connecting wire.

[0008] As a preferred solution of the pressure and temperature transmitter described in the utility model, the electronic circuit board and the stainless steel glass glaze sintered base are fixed by welding with lead welding pins.

[0009] As a preferred solution of the pressure and temperature transmitter described in the utility model, the welding pins of the stainless steel glass glaze sintered base are welded to the corresponding welding points of the electronic circuit board to fix the electronic circuit board.

[0010] As a preferred solution of the pressure and temperature transmitter described in the utility model, the pressure and temperature transmitter assembly further includes an O-ring arranged at the outer ring position of the stainless steel glass glaze sintered base;

[0011] Wherein, the O-ring is pressed into the stainless steel base.

[0012] As a preferred solution of the pressure and temperature transmitter described in the utility model, wherein the pressure and temperature transmitter assembly further includes a clamping ring;

[0013] Wherein, the clamping ring presses the O-ring.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] Through the cooperation of the shell assembly and the pressure and temperature variable assembly, a MEMS electronic pressure and temperature sensor is used. The temperature sensor is in direct contact with the measuring gas. The pressure value and temperature value are directly converted inside the MEMS electronic pressure and temperature sensor and output as a digital signal. It has strong anti-interference performance and high precision, reducing peripheral electronic components and costs. The MEMS electronic pressure and temperature sensor is welded on the matching stainless steel glass sintered base and pressed into the transmitter base, which meets the electrical connection performance and ensures the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a system block diagram of the utility model;

[0019] Figure 3 This is a circuit schematic diagram of the utility model.

[0020] In the figure: 11, stainless steel shell; 12, stainless steel glass glaze sintered base; 13, stainless steel base; 21, electronic circuit board; 22, clamping ring; 23, O-ring; 24, MEMS electronic pressure and temperature sensor; 25, metal waterproof aviation plug. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0024] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] The utility model provides a pressure and temperature transmitter. Through the cooperation of a shell component and a pressure and temperature transmitter component, a MEMS electronic pressure and temperature sensor is adopted. The temperature sensor is in direct contact with the measuring gas. The pressure value and the temperature value are directly converted inside the MEMS electronic pressure and temperature sensor and output as a digital signal. The MEMS electronic pressure and temperature sensor has strong anti-interference performance and high precision, and reduces peripheral electronic components and costs. The MEMS electronic pressure and temperature sensor is welded on a matching stainless steel glass sintered base and pressed into the transmitter base, which satisfies the electrical connection performance and ensures the sealing performance.

[0026] Figure 1 , Figure 2 , Figure 3 The schematic diagram of the overall structure of the pressure and temperature transmitter of the utility model is shown. Figure 1 , Figure 2 , Figure 3 The main structure of this embodiment includes: a shell assembly and a pressure and temperature transmitter assembly.

[0027] The shell assembly is used for integral molding. Specifically, the shell assembly includes a stainless steel shell 11, a stainless steel glass glaze sintered base 12 arranged on the bottom surface of the stainless steel shell 11, and a stainless steel base 13 welded to the stainless steel shell 11.

[0028] During specific use, the stainless steel housing 11, the stainless steel glass glaze sintered base 12 and the stainless steel base 13 are welded and fixed to each other, and are integrally formed, so as to have a good isolation effect.

[0029] The pressure and temperature transmitter assembly is used to accurately measure the gas temperature. Specifically, the pressure and temperature transmitter assembly includes a metal waterproof aviation plug 25 arranged at the top of the stainless steel housing 11, an electronic circuit board 21 arranged in the stainless steel housing 11, and a MEMS electronic pressure and temperature sensor 24 arranged in the stainless steel glass glaze sintered base 12; the pressure and temperature transmitter assembly also includes an O-ring 23 arranged at the outer ring position of the stainless steel glass glaze sintered base 12; wherein the O-ring 23 is pressed into the stainless steel base 13; the pressure and temperature transmitter assembly also includes a clamping ring 22;

[0030] Among them, the clamping ring 22 presses the O-ring 23;

[0031] During specific use, the working power supply is DC9V~DC30V, which is powered by an external power supply. The pressure sensor is a MEMS electronic pressure and temperature sensor 24. The data output method of the pressure sensor is I2C bus. The central processing unit reads the pressure value and temperature value measured by the sensor through the I2C bus, and obtains the corresponding gas pressure value and gas temperature value after conversion, and then converts the equivalent pressure value. The processor then uploads the pressure value, temperature value, and equivalent value to the host through the RS485 data line and displays it; the data upload method can be active data upload or passive response data upload. The MEMS electronic pressure and temperature sensor 24 is welded on the circuit board, and the circuit board is welded and fixed to the lead welding pin of the stainless steel glass glaze sintered base 12, and a matching O-ring is installed on the outer ring of the sintered base. 23 is pressed into the stainless steel base 13 and tightened with a clamping ring 22. The welding pins of the stainless steel glass glaze sintered base 12 are welded to the corresponding welding points of the electronic circuit board 21 and the electronic circuit board 21 is fixed; the metal waterproof aviation plug 25 is installed on the stainless steel shell 11, and then the socket of the electronic circuit board 21 is connected to the metal waterproof aviation plug 25 with a connecting wire. The stainless steel shell 11 and the stainless steel base 13 are welded together. The MEMS electronic pressure and temperature sensor 24 is fixed and isolated by the stainless steel glass glaze sintered base 12, which not only ensures the sealing performance, but also ensures good electrical connection reliability. The transmitter has a small size, good sealing performance, high precision, low power consumption, sensitive response, and good anti-interference performance. Since the temperature sensor and the pressure sensor are combined together, the measured gas temperature data is closer to the actual temperature value of the gas.

[0032] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. Pressure and temperature transmitter, characterized in that, include: A shell assembly, the shell assembly comprising a stainless steel shell (11), a stainless steel glass glaze sintered base (12) arranged on the bottom surface of the stainless steel shell (11), and a stainless steel base (13) welded to the stainless steel shell (11); A pressure and temperature transmitter assembly, comprising a metal waterproof aviation plug (25) arranged at the top of the stainless steel housing (11), an electronic circuit board (21) arranged in the stainless steel housing (11), and a MEMS electronic pressure and temperature sensor (24) arranged in the stainless steel glass glaze sintered base (12).

2. The pressure and temperature transmitter according to claim 1, characterized in that: The metal waterproof aviation plug (25) is mounted on the stainless steel housing (11), and the socket of the electronic circuit board (21) is connected to the metal waterproof aviation plug (25) by a connecting wire.

3. The pressure and temperature transmitter according to claim 2, characterized in that: The electronic circuit board (21) and the stainless steel glass glaze sintered base (12) are fixed by welding via lead welding pins.

4. The pressure and temperature transmitter according to claim 3, characterized in that: The welding pins of the stainless steel glass glaze sintered base (12) are welded to the corresponding welding points of the electronic circuit board (21), thereby fixing the electronic circuit board (21).

5. The pressure and temperature transmitter according to claim 4, characterized in that: The pressure and temperature transmitter assembly further comprises an O-type sealing ring (23) arranged at the outer ring position of the stainless steel glass glaze sintered base (12); Wherein, the O-ring (23) is pressed into the stainless steel base (13).

6. The pressure and temperature transmitter according to claim 5, characterized in that: The pressure and temperature transmitter assembly further comprises a clamping ring (22); The pressing ring (22) presses the O-ring (23).

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