High-precision portable explosion-proof dew-point instrument

Abstract

The utility model relates to a high-precision portable explosion-proof dew-point instrument, which comprises a closed case, electronic components are integrated in the case, and a refrigerating machine, a gas measuring cavity, a photoelectric measuring cavity and other components are arranged outside, so that the space utilization and heat dissipation efficiency are optimized, the risk of over-high internal temperature is reduced, and the explosion-proof dew-point instrument is convenient to use. Electronic components are protected, and the service life of equipment is prolonged. The dew-point instrument is simple in structure and small in size, has excellent heat dissipation and anti-vibration performance, reduces the manufacturing cost, and is convenient to carry and install. Besides, through optimization design, the safety and the reliability are improved while high-precision measurement of the equipment is maintained, and the device is particularly suitable for flammable and explosive environments.

Description

Technical Field

[0001] The utility model belongs to the technical field of explosion-proof dew point meters, and specifically relates to a high-precision portable explosion-proof dew point meter. Background Technique

[0002] A dew point meter is a precision instrument specifically used to measure the micro water content in industrial gases, and usually indirectly reflects the humidity of the gas by measuring the dew point temperature. The dew point temperature refers to the temperature at which the water vapor in the air reaches the saturation state and begins to condense into liquid water. This temperature is related to the water content in the gas, so it can be used to indirectly measure the water content. Dew point meters are widely used in various industrial processes, including but not limited to petrochemical, natural gas processing, electric power, pharmaceutical, food processing, and air quality monitoring, etc.

[0003] With the progress of technology, the design of dew point meters has become increasingly compact, with a wider measurement range and more diverse functions, including the ability to measure the dew point temperature of multiple gases, as well as the ability to provide real-time data and remote monitoring. High-quality dew point meters can provide high-precision and high-stability measurement results. They use a large-capacity refrigeration machine to rapidly cool down, ensuring that the measurement range of the dew point meter can reach a lower limit of -100°C. The dedicated micro Stirling refrigeration machine has low power consumption, stable and reliable operation, and precise temperature control, which is beneficial to improving the measurement accuracy. Compared with the Peltier cold pump refrigeration method, no auxiliary refrigeration equipment is required in the extremely low measurement temperature range, which can significantly reduce the volume and weight of the equipment. By adopting a double optical path and lens optimization structure, it has better stability and anti-interference ability. The dew point is determined by using the differential of two optical signal paths, reducing or eliminating environmental and noise interference, and improving the measurement accuracy and reliability of the system. The mirror surface is treated with a special process and has an integrated structure to improve the condensation uniformity, eliminate measurement hysteresis, and improve the measurement accuracy. Dew point meters used in flammable and explosive environments will adopt explosion-proof designs to ensure the safety of the measurement process. Explosion-proof dew point meters are crucial for temperature monitoring in petrochemical, power, mining, and other potentially flammable and explosive environments. Their design faces challenges in operating safely in flammable and explosive environments, including effective heat dissipation requirements. These devices usually integrate electronic components and refrigeration machine components. The refrigeration machine generates heat during operation. Its working principle is that the gas medium in the refrigeration machine does work by adiabatic expansion, that is, it works according to the reverse Stirling cycle for refrigeration. The compression end of the refrigeration machine must operate below 80°C. When the temperature exceeds this value, the compression end may be damaged. Even if it is not damaged, the temperature at the refrigeration end cannot drop. If the compressor is integrated in the enclosed space inside the chassis, it is impossible to directly dissipate heat from the inside. Therefore, the heat dissipation performance and service life of the product will be affected. Although these devices consider heat dissipation issues during design, including the working conditions, maintenance status, and design capabilities of the devices, to ensure stable operation in high-temperature environments, there are still certain risks. And because all components are integrated inside the dew point meter body, the volume of the device becomes larger, the heat dissipation performance is poor, and the service life of the product is reduced. Summary of the Utility Model

[0004] In order to improve the safety and durability of the device and solve the problems that all components are integrated inside the dew point meter body, resulting in high device temperature and poor heat dissipation performance, a high-precision portable explosion-proof dew point meter is proposed. The electronic components are integrated inside the chassis, and heat source components such as the refrigeration unit assembly, gas measurement chamber assembly, and optoelectronic measurement chamber assembly are integrated outside the chassis. This layout helps to reduce the occupancy of the internal space of the chassis and improve the heat dissipation efficiency of each component, avoiding excessive temperature inside the chassis and the inability to release heat, which may cause damage to electronic components and equipment shutdown, thereby protecting the internal electronic components and improving the overall service life of the dew point meter. This designed explosion-proof dew point meter has a simple structure, small volume, good heat dissipation, and low vibration, which helps to reduce the manufacturing cost. At the same time, it is convenient to carry and install. By optimizing heat dissipation and internal layout, the safety, reliability, and service life of the device are improved, while maintaining high-precision measurement performance, making it very suitable for use in flammable and explosive environments.

[0005] A high-precision portable explosion-proof dew point meter provided by this application has the following solutions.

[0006] A high-precision portable explosion-proof dew point meter provided by this application mainly includes: a chassis, a data acquisition board assembly, a power module assembly, a refrigeration unit assembly, a gas measurement chamber assembly, and an optoelectronic measurement chamber assembly. The refrigeration unit assembly includes a compressor assembly and a cold finger assembly. It is characterized in that: the chassis is a closed cavity, integrally processed from aluminum. There is a sealing cover and a flange on the upper end of the chassis. The flange is fixedly connected to the chassis, and the sealing cover is fixedly connected to the flange; there is a bottom plate at the lower end of the chassis; a rectangular bracket is fixedly installed inside the chassis. The upper end of the rectangular bracket is provided with a data acquisition board assembly, a power module assembly, and a fan. The data acquisition board assembly and the power module assembly are arranged in a parallel up-and-down layout, and the fan and the power module assembly are arranged in a parallel front-and-back layout, respectively fixedly installed on the rectangular bracket; on one side outside the chassis, there is an armored explosion-proof connector for the arrangement of power lines and signal lines; on the front left side of the main body outside the chassis, there is a compressor assembly mounting seat, and on the right side, there is a cold finger assembly mounting seat, respectively used for fixedly installing the compressor assembly and the cold finger assembly. Above the cold finger assembly, there is a gas measurement chamber assembly. Inside the gas measurement chamber assembly, an optoelectronic measurement chamber assembly is installed above. The cold finger assembly, the gas measurement chamber assembly, and the optoelectronic measurement chamber assembly are assembled into one body.

[0007] Furthermore, the flange is designed with a hollow structure. There is a large-diameter cavity in the middle of the flange to provide installation space for the electronic components inside the chassis. Above the flange and located above the optoelectronic measurement chamber assembly, there is an observation chamber, which allows the operator or maintenance personnel to directly observe the working state of the optoelectronic measurement component, facilitating inspection or maintenance.

[0008] Furthermore, the sealing cover is fixedly connected to the flange surface by screws. A first sealing groove is provided in a circle on the upper surface of the flange surface, and a first sealing ring is provided in the first sealing groove, so as to maintain the sealing performance between the sealing cover and the flange surface.

[0009] Furthermore, a microcomputer is provided in the middle of the sealing cover, and the microcomputer is composed of a liquid crystal screen and a microcomputer board.

[0010] Furthermore, the armored explosion-proof joint is used to connect the power cord and signal line inside the chassis to the compressor outside the chassis. A second sealing ring is provided at the interface of the armored explosion-proof joint to maintain good sealing performance of the chassis.

[0011] Furthermore, the compressor assembly and the cold finger assembly are connected by a pipeline, enabling flexible layout. The cold finger assembly is used as the refrigeration end to generate cold, and the compressor assembly provides the kinetic energy for the gas medium in the refrigerator to do work.

[0012] Furthermore, at least one circle of fins is installed around the compressor assembly. The fins are fixedly connected to the compressor assembly and are spirally arranged around the compressor assembly, forming a spiral heat dissipation structure.

[0013] Furthermore, multiple heat pipes are provided at the connection between the compressor assembly mounting seat and the chassis. One end of each heat pipe is the evaporation end, and the other end is the condensation end, and they are arranged longitudinally side by side. When one end of the heat pipe is heated, the liquid in the capillary quickly vaporizes, and the vapor flows to the other end under the power of heat diffusion and condenses at the cold end to release heat, which can quickly transfer the heat at the compressor end to the chassis panel, and release the heat through the heat exchange of the panel to achieve the purpose of heat dissipation.

[0014] Furthermore, hanging ears are provided at the four corners of the chassis bottom plate, which are convenient for fixing on the wall during on-site use, thereby improving the portability of the dew point meter.

[0015] The beneficial effects of the present utility model are as follows: A high-precision portable explosion-proof dew point meter. The chassis of the dew point meter is a closed cavity, integrally processed from aluminum. All electronic components are integrated inside the closed chassis, which can effectively isolate the external environment, prevent external gases, dust or other pollutants from entering, thereby protecting the internal electronic components from damage, ensuring that the electronic components do not come into contact with gases during operation, and greatly reducing the risk of explosion. The refrigeration unit assembly, gas measurement chamber assembly and optoelectronic measurement chamber assembly are integrated on the outside of the chassis. This layout not only saves space but also avoids overheating inside the chassis, which may cause damage to the electronic components, thus protecting the internal electronic components, preventing performance degradation or damage caused by overheating, and improving the overall service life of the dew point meter and reducing maintenance costs. The dew point meter has a simple structure, small size, good heat dissipation, low vibration, is easy to carry and install, and this design can be used in flammable and explosive environments to ensure safety in dangerous environments, while providing high-precision measurement results and improving the durability and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the present utility model will be further described below with reference to the drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure of the dew point meter in the embodiment of the present utility model.

[0018] Figure 2 It is a schematic diagram of the structure of the sealing cover in the embodiment of the present utility model.

[0019] Figure 3 It is a top view of the structure of the dew point meter in the embodiment of the present utility model.

[0020] Figure 4 It is a front view of the structure of the dew point meter in the embodiment of the present utility model.

[0021] Symbol description in the figure: 1. Chassis, 2. Sealing cover, 2.1. Microcomputer, 2.1.1. Liquid crystal screen, 2.1.2. Microcomputer board, 3. Flange surface, 3.1. Cavity, 3.2. Observation chamber, 3.3. Sealing groove 1, 3.4. Sealing ring 1, 4. Bottom plate, 4.1. Hanging ear, 5. Rectangular bracket, 5.1. Data acquisition board assembly, 5.2. Power module assembly, 5.3. Fan, 6. Armored explosion-proof joint, 6.1. Sealing ring 2, 7. Refrigeration unit assembly, 7.1. Compressor assembly, 7.2. Compressor assembly mounting seat, 7.3. Cold finger assembly, 7.4. Cold finger assembly mounting seat, 7.5. Gas measurement chamber assembly, 7.6. Optoelectronic measurement chamber assembly, 7.11. Fins, 7.12. Heat pipe, 7.13. Pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the embodiments of the present utility model will be further introduced in detail below with reference to the accompanying drawings. Obviously, the embodiments described herein are only a part of the examples of the present utility model, not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0023] As shown in the figure, a high-precision portable explosion-proof dew point meter according to the present utility model mainly includes a chassis 1, a data acquisition board assembly 5.1, a power supply module assembly 5.2, a refrigeration unit assembly 7, a gas measurement chamber assembly 7.5, and an optoelectronic measurement chamber assembly 7.6. The refrigeration unit assembly 7 includes a compressor assembly 7.1 and a cold finger assembly 7.3.

[0024] The chassis 1 is a closed cavity for isolating gas. A sealing cover 2 and a flange surface 3 are provided at the upper end of the chassis 1. The flange surface 3 is fixedly connected to the chassis 1, and the sealing cover 2 is fixedly connected to the flange surface 3. A bottom plate 4 is provided at the lower end of the chassis 1. A rectangular bracket 5 is fixedly installed inside the chassis 1. A data acquisition board assembly 5.1, a power supply module assembly 5.2, and a fan 5.3 are provided at the upper end of the rectangular bracket 5. The data acquisition board assembly 5.1 and the power supply module assembly 5.2 are arranged in a parallel up-and-down layout, and the fan 5.3 and the power supply module assembly 5.2 are arranged in a parallel front-and-back layout, and are respectively fixedly installed on the rectangular bracket 5. An armored explosion-proof connector 6 is provided on one side of the outside of the chassis 1 for fixing and sealing power lines and signal lines, and has explosion-proof, waterproof, and flame-retardant properties. A compressor assembly mounting seat 7.2 is provided on the left side of the front end face of the main body outside the chassis 1, and a cold finger assembly mounting seat 7.4 is provided on the right side, which are respectively used for fixedly installing the compressor assembly 7.1 and the cold finger assembly 7.3. A gas measurement chamber assembly 7.5 is provided above the cold finger assembly 7.3. An optoelectronic measurement chamber assembly 7.6 is installed above the inside of the gas measurement chamber assembly 7.5. The cold finger assembly 7.3, the gas measurement chamber assembly 7.5, and the optoelectronic measurement chamber assembly 7.6 are assembled into one body.

[0025] Furthermore, the flange surface 3 is designed with a hollow structure, having a large-diameter cavity 3.1 in the middle. The hollow flange surface 3 provides additional installation space, enabling various electronic components to be installed inside the chassis 1, thus optimizing the spatial layout. An observation cavity 3.2 is provided above the optoelectronic measurement cavity assembly 7.6 on the flange surface 3. The observation cavity 3.2 allows the operator or maintenance personnel to directly observe the working state of the optoelectronic measurement cavity assembly 7.6, including its operation and internal wiring, to ensure that there is no abnormality in the optoelectronic measurement cavity assembly 7.6. This structural design of the flange surface 3 greatly simplifies the inspection and maintenance work, reduces the maintenance time, and lowers the maintenance difficulty. This design integrates the functions of observation and maintenance into the flange surface 3, reducing the need for additional components and making the entire system more compact and efficient.

[0026] The sealing cover 2 is fixedly connected to the flange surface 3 by screws. A first sealing groove 3.3 is provided in a circle on the upper surface of the flange surface 3, and a first sealing ring 3.4 is provided in the first sealing groove 3.3, thereby forming a seal between the sealing cover 2 and the flange surface 3 to prevent gas from flowing into the chassis 1 and generating sparks with the electrical components working inside the chassis 1, preventing an explosion.

[0027] A microcomputer 2.1 is provided in the middle of the sealing cover 2. The microcomputer 2.1 is composed of a liquid crystal screen 2.1.1 and a microcomputer board 2.1.2.

[0028] The armored explosion-proof joint 6 is used to connect the power line and signal line inside the chassis 1 to the compressor assembly 7.1 outside the chassis 1. A second sealing ring 6.1 is provided at the interface of the armored explosion-proof joint 6 to maintain good sealing performance of the chassis.

[0029] The compressor assembly 7.1 and the cold finger assembly 7.3 are connected by a pipeline 7.13, enabling flexibility. The cold finger assembly 7.3 is used as the refrigeration end to generate cold, and the compressor assembly 7.1 provides the kinetic energy for the gas medium in the refrigerator to do work.

[0030] At least one circle of fins 7.11 is installed around the compressor assembly 7.1. The fins 7.11 are fixedly connected to the compressor assembly 7.1 and are spirally arranged around the compressor assembly 7.1 to form a spiral heat dissipation structure. This fin 7.11 structure can increase the heat dissipation area, thereby improving the heat dissipation performance of the compressor, preventing damage caused by excessive heat of the compressor, and thus increasing the service life of the compressor, enabling the heat of the compressor to be quickly dissipated.

[0031] The connection between the compressor assembly mounting seat 7.2 and the chassis 1 adopts a heat pipe 7.12 structure. The heat pipe 7.12 utilizes the phase change process in which the medium evaporates at the hot end and condenses at the cold end. One end of the heat pipe 7.12 is the evaporation end, and the other end is the condensation end, and they are arranged longitudinally side by side. When one end of the heat pipe 7.12 is heated, the liquid in the capillary quickly vaporizes, and the vapor flows to the other end under the power of heat diffusion and condenses at the cold end to release heat, which can quickly transfer the heat at the compressor end to the panel of the chassis 1, and release the heat through the heat exchange of the panel to achieve the purpose of heat dissipation.

[0032] Hanging ears 4.1 are provided at the four corners of the bottom plate 4, which are convenient for fixing to the wall during on-site use, thereby improving the portability of the dew point meter.

[0033] Only some exemplary embodiments of the present invention are described above by way of illustration, but the protection scope of the present invention is not limited thereto. The words only represent this one embodiment. Any person skilled in the art can easily think of any transformation or replacement within the technical scope disclosed by the present invention, and any such words should be covered within the protection scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A high-precision portable explosion-proof dew point meter, mainly including: A chassis, a data acquisition board assembly, a power module assembly, a refrigerator assembly, a gas measurement chamber assembly and a photoelectric measurement chamber assembly, wherein the refrigerator assembly includes a compressor assembly and a cold finger assembly, and is characterized in that: the chassis is a closed cavity, a sealing cover and a flange surface are provided at the upper end of the chassis, the flange surface is fixedly connected to the chassis, and the sealing cover is fixedly connected to the flange surface; a bottom plate is provided at the lower end of the chassis, a rectangular bracket is fixed inside the chassis, a data acquisition board assembly, a power module assembly and a fan are provided at the upper end of the rectangular bracket, and the data acquisition board assembly and the power module assembly are arranged in parallel up and down, The fan and the power module assembly are arranged in parallel front and back and are respectively fixedly mounted on the rectangular bracket; an armored explosion-proof connector is provided on one side of the exterior of the chassis for arranging power lines and signal lines; a compressor assembly mounting seat is provided on the left side of the front end surface of the exterior main body of the chassis, and a cold finger assembly mounting seat is provided on the right side, which are respectively used to fix the compressor assembly and the cold finger assembly, a gas measuring chamber assembly is provided above the cold finger assembly, and a photoelectric measuring chamber assembly is provided above the gas measuring chamber assembly, and the cold finger assembly, the gas measuring chamber assembly and the photoelectric measuring chamber assembly are assembled into one.

2. A high-precision portable explosion-proof dew point meter according to claim 1, characterized in that: The flange surface adopts a hollow design, and a large-caliber cavity is set in the middle of the flange surface to provide installation space for electronic components inside the chassis. The flange surface is located above the photoelectric measurement cavity assembly to set an observation cavity. The observation cavity allows the operator or maintenance personnel to directly observe the working status of the photoelectric measurement assembly, which is convenient for inspection or maintenance.

3. A high-precision portable explosion-proof dew point meter according to claim 1, characterized in that: The sealing cover is fixedly connected to the flange surface by screws, a sealing groove 1 is arranged around the upper surface of the flange surface, and a sealing ring 1 is arranged in the sealing groove 1, so as to maintain the sealing performance between the sealing cover and the flange surface.

4. A high-precision portable explosion-proof dew point meter according to claim 1, characterized in that: A microcomputer is arranged in the middle of the sealing cover, and the microcomputer consists of a liquid crystal screen and a microcomputer board.

5. A high-precision portable explosion-proof dew point meter according to claim 1, characterized in that: The armored explosion-proof joint is used to connect the power line and signal line inside the chassis with the compressor outside the chassis. A sealing ring 2 is provided at the interface of the armored explosion-proof joint to maintain good sealing performance of the chassis.

6. A high-precision portable explosion-proof dew point meter according to claim 1, characterized in that: The compressor assembly and the cold finger assembly are connected by a pipeline, which can be flexible and localized. The cold finger assembly is used as a refrigeration end to generate cold energy, and the compressor assembly provides kinetic energy for the gas medium in the refrigerator to do work.

7. A high-precision portable explosion-proof dew point meter according to claim 1, characterized in that: At least one circle of fins is installed on the periphery of the compressor assembly. The fins are fixedly connected to the compressor assembly and are spirally arranged around the compressor assembly to form a spiral heat dissipation structure.

8. A high-precision portable explosion-proof dew point meter according to claim 1, characterized in that: A plurality of heat pipes are arranged at the connection between the compressor assembly mounting base and the chassis, one end of the heat pipes is an evaporation end, and the other end is a condensation end, and the heat pipes are arranged in parallel in a longitudinal direction.

9. A high-precision portable explosion-proof dew point meter according to claim 1, characterized in that: The four corners of the chassis bottom plate are provided with hanging ears, which are convenient for fixing to the wall when used on site, thereby improving the portability of the dew point meter.

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