Temperature, humidity and pressure multi-parameter coupling gas experiment device with embedded gas pressure sensor
By designing an embedded pressure sensor and a piston drive rod structure, the problems of large chamber volume and condensation in humidity sensor testing under high temperature and high pressure conditions were solved, realizing a miniaturized and precisely pressure-controlled gas experimental device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-03-10
AI Technical Summary
When conducting humidity sensor tests under high temperature and high pressure conditions, existing technologies require real-time pressure monitoring. However, traditional solutions increase the volume of the experimental chamber, and the large size of the costly pressure gauge hinders the smooth conduct of the experiment. Furthermore, high-humidity gases tend to condense near the pressure gauge.
A multi-parameter coupled gas experimental device with temperature, humidity, and pressure embedded in a pressure sensor was designed. By embedding the pressure sensor in the end cap, the number of pipeline connections is reduced. Combined with the piston and drive rod structure, the sealing of the gas experimental chamber and precise pressure control are achieved.
The experimental chamber volume was reduced, high dew point gas condensation was avoided, the parameter range of the experimental device was expanded, and accurate pressure measurement was achieved under high temperature and high pressure conditions.
Smart Images
Figure CN223986101U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a temperature, humidity, and pressure multi-parameter coupled gas experimental device with an embedded pressure sensor, which can be used for calibration and measurement of gas experiments under high temperature, high pressure, and humidity conditions. Background Technology
[0002] Humidity is an extremely important physical parameter, closely related to our daily lives and indispensable in fields ranging from personal living environments to semiconductor manufacturing, meteorological observation, biomedicine, and aerospace exploration. Therefore, accurately measuring humidity under various conditions is of paramount importance.
[0003] With the development of humidity sensors, their measurement conditions are gradually expanding to include high temperature and high pressure. Further research and development of humidity sensors requires thorough testing in real-world environments. During testing of humidity sensors under high temperature and high pressure conditions, real-time pressure monitoring is necessary to adjust experimental conditions. The current approach involves connecting an external pressure gauge to the experimental chamber via a metal tubing. This approach has several drawbacks. First, it increases the volume of the experimental chamber, hindering gas pressurization. Second, it requires the pressure gauge to function properly at high temperatures, which is expensive and bulky, hindering the smooth conduct of experiments.
[0004] In general, the development of special humidity sensors requires testing under different temperatures and pressures, especially under extreme conditions where high temperature and high pressure coexist. Currently, experimental devices that can meet research needs under high temperature and high pressure conditions have high requirements for the parameters of the barometer, and high humidity gas is prone to condensation in the pipeline near the barometer. Summary of the Invention
[0005] The purpose of this invention is to provide a multi-parameter coupled gas experimental device with embedded pressure sensor, which can effectively detect the sensor under specific conditions, and the detection device is small in size and the detection process is more convenient.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] This utility model provides a multi-parameter coupled gas experimental device with temperature, humidity, and pressure and an embedded pressure sensor, which includes an experimental chamber, a first end cap, a second end cap, a third end cap, a piston, a piston rod, and a drive rod.
[0008] The experimental chamber is fixedly disposed between the first end cap and the second end cap, forming a closed gas experimental chamber;
[0009] The third end cap is disposed on the side of the second end cap and is located on the side away from the experimental chamber. The third end cap is fixedly connected to the second end cap by a pull rod.
[0010] The piston is disposed in the experimental chamber and slides in contact with the inner wall of the experimental chamber, and a sealing ring is provided between the piston and the inner wall of the experimental chamber.
[0011] One end of the piston rod is fixedly connected to the piston, and the other end passes through the second end cap and extends between the second end cap and the third end cap;
[0012] The drive rod is mounted on the third end cap and is coaxial with the piston rod. The drive rod and the piston rod work together to control the position of the piston in the experimental chamber, thereby changing the volume of the gas to be tested in the gas experimental chamber.
[0013] The first end cap has a plug mounting hole with internal threads in the middle along the axial direction. The plug mounting hole penetrates the opposite sides of the first end cap. At least two functional holes are opened on the circumferential surface of the first end cap. Each functional hole is connected to the plug mounting hole. The at least two functional holes include an air inlet / outlet and a sensor mounting hole. The pressure sensor is embedded in the pressure probe. The pressure probe has external threads. The sensor mounting hole is a threaded hole. The pressure probe is threadedly engaged with the sensor mounting hole.
[0014] Optionally, a sealing ring is provided in the sensor mounting hole, and the top end of the pressure probe is a flat surface. The top end of the pressure probe is in close contact with the sealing ring in the sensor mounting hole and is pressed against the sealing ring as it is screwed in.
[0015] Optionally, the pressure sensor uses a heat-resistant pressure-sensitive element.
[0016] Optionally, the at least two functional holes may further include a vent hole, which is connected to a safety valve to ensure experimental safety.
[0017] Optionally, each functional hole is connected to the plug mounting hole through a gas connection channel provided inside the end cap, for connecting the gas experimental chamber.
[0018] Optionally, the first end cap and the second end cap are fixedly connected by a pull rod, and mounting grooves are respectively opened on the opposite sides of the first end cap and the second end cap. The experimental cavity is hollow cylindrical in shape with openings at both ends, and the two ends of the experimental cavity are engaged in the mounting grooves.
[0019] Optionally, a sealing ring is provided in the mounting groove.
[0020] Optionally, the drive rod is a threaded rod, with a threaded hole in the middle of the third end cover. The threaded rod is threadedly engaged with the threaded hole on the third end cover, and a handle or operating hole is provided at the end of the drive rod away from the piston rod.
[0021] Optionally, the plug mounting hole has an internal thread for threaded connection to secure the aviation plug.
[0022] Optionally, heating wires are wound around the outer wall of the experimental chamber to adjust the temperature inside the gas experimental chamber.
[0023] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0024] This invention relates to a temperature, humidity, and pressure multi-parameter coupled gas experimental device with an embedded pressure sensor. This device reduces the volume of the experimental chamber, enhances the gas compression effect, and compared with traditional experimental structures, eliminates the need for a pipeline connecting the pressure gauge, further reducing the volume of the experimental chamber. This allows for achieving higher pressures with the same initial pressure and compression.
[0025] In addition, this invention avoids the condensation phenomenon of high dew point gases due to temperature reduction, expands the parameter range of the experimental device, and the structure of embedding the pressure sensor in the end cap makes the surface temperature of the sensor similar to the temperature of the inner wall of other parts, avoiding the problem of high humidity gas condensing when it encounters the lower temperature of the pipe inner wall and the surface of the pressure sensor in the traditional structure. Attached Figure Description
[0026] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:
[0027] Figure 1 This is a three-dimensional structural schematic diagram of a multi-parameter coupled gas experimental device based on temperature, humidity, and pressure according to an embodiment of the present invention;
[0028] Figure 2 This is a cross-sectional structural schematic diagram of a multi-parameter coupled gas experimental device based on temperature, humidity and pressure according to one embodiment of the present invention;
[0029] Figure 3 This is a side view of a multi-parameter coupled gas experimental device based on temperature, humidity, and pressure according to one embodiment of the present invention.
[0030] Figure 4 This is a schematic diagram of the structure of the gas pressure sensor and pressure probe in a multi-parameter coupled gas experimental device based on temperature, humidity and pressure according to one embodiment of the present invention.
[0031] The annotations in the attached figures are explained as follows:
[0032] 1. Experimental chamber; 11. Installation slot;
[0033] 21. First end cap; 22. Second end cap; 23. Third end cap;
[0034] 31. Piston; 32. Piston rod; 33. Sealing ring;
[0035] 4. Drive rod; 41. Limit block;
[0036] 5. Plug mounting hole;
[0037] 61. Air inlet / outlet; 62. Sensor mounting hole; 63. Air duct.
[0038] 71. First pull rod; 72. Second pull rod;
[0039] 81. Pressure sensor; 82. Pressure probe; 83. External thread on the pressure probe. Detailed Implementation
[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0041] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0042] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0043] This embodiment provides a multi-parameter coupled gas experimental device with an embedded pressure sensor, such as a temperature, humidity, and pressure sensor. Figures 1 to 3 As shown, it includes an experimental chamber 1, a first end cap 21, a second end cap 22, a third end cap 23, a piston 31, a piston rod 32, and a drive rod 4.
[0044] The experimental chamber 1 is a hollow structure, with the first end cap 21, the second end cap 22, and the third end cap 23 spaced apart.
[0045] The experimental chamber 1 is fixedly disposed between the first end cap 21 and the second end cap 22, forming a closed gas experimental chamber;
[0046] The third end cap 23 is disposed on the side of the second end cap 22 and is located on the side away from the experimental chamber 1. The third end cap 23 is fixedly connected to the second end cap 22 by the second pull rod 72.
[0047] The piston 31 is disposed in the experimental chamber 1 and slides in contact with the inner wall of the experimental chamber 1. A sealing ring 33 is provided between the piston 31 and the inner wall of the experimental chamber 1. The piston 31 and the chamber wall of the experimental chamber 1 are made of the same metal material to ensure synchronous expansion or contraction during heating or cooling, thus maintaining the airtightness of the gas experimental chamber.
[0048] One end of the piston rod 32 is fixedly connected to the piston 31, and the other end passes through the second end cover 22 and extends between the second end cover 22 and the third end cover 23;
[0049] The drive rod 4 is mounted on the third end cap 23. The drive rod 4 and the piston rod 32 are coaxially aligned. The drive rod 4 and the piston rod 32 cooperate to control the position of the piston 31 within the experimental chamber 1, thereby changing the volume of the gas to be tested within the gas experimental chamber. In summary, the piston 31 is driven by the piston rod 32, and the piston rod 32 and the drive rod 4 are in contact through two relatively rotatable planes. This allows the piston 31 to only translate without rotating when pushed or pulled, thus maintaining the sealing effect inside the gas experimental chamber under high pressure.
[0050] The first end cover 21 has a plug mounting hole 5 with internal threads in the middle along the axial direction. The plug mounting hole 5 penetrates the opposite two sides of the first end cover 21. At least two functional holes are formed on the circumferential surface of the first end cover 21, each functional hole communicating with the plug mounting hole 5. The at least two functional holes include an air inlet / outlet 61 and a sensor mounting hole 62, such as... Figure 4 As shown, the pressure sensor 81 is embedded in the pressure probe 82, which has an external thread 83. The sensor mounting hole 62 is a threaded hole, and the pressure probe 82 is threadedly engaged with the sensor mounting hole 62. The plug mounting hole 5 has an internal thread for threaded connection and fixing of the aviation plug.
[0051] When performing detection, the humidity sensor is placed in the gas experimental chamber, and the detected electrical signal is transmitted out via an aviation connector during the experiment. Additionally, if real-time temperature monitoring is required within the gas experimental chamber, a temperature sensor can be installed inside the chamber, and the electrical signal can be transmitted to a host computer via an aviation connector. After data processing, the data can be displayed in real-time on the host computer.
[0052] In one embodiment, a sealing ring is provided in the sensor mounting hole 62, and the top end of the pressure probe 82 is a flat surface. The top end of the pressure probe 82 is in close contact with the sealing ring in the sensor mounting hole 62, and the sealing ring is pressed tightly as it is screwed in. The air pressure sensor 81 uses a heat-resistant pressure-sensitive element.
[0053] In one embodiment, the at least two functional holes further include a vent 63, which is connected to a safety valve to ensure experimental safety. The vent 63 on the first end cap 21 is connected to the safety valve, which can adjust the pressure setting value according to experimental conditions to ensure the safety of experimental personnel and equipment.
[0054] In one embodiment, each functional hole is connected to the plug mounting hole 5 through a gas connection channel provided inside the end cap, for connecting the gas experimental chamber.
[0055] In one embodiment, the first end cap 21 and the second end cap 22 are fixedly connected by a first pull rod 71. Mounting grooves 11 are respectively provided on the opposite side surfaces of the first end cap 21 and the second end cap 22. The experimental chamber 1 is generally hollow cylindrical with openings at both ends, and both ends of the experimental chamber 1 are fitted into the mounting grooves 11. To improve sealing, sealing rings are also provided in the mounting grooves 11.
[0056] The first end cap 21 and the second end cap 22, as well as the second end cap 22 and the third end cap 23, are detachably connected by multiple pull rods. In this embodiment, the first end cap 21 and the second end cap 22, as well as the second end cap 22 and the third end cap 23, are detachably connected by four pull rods. Two sets of eight pull rods are provided between the first end cap 21, the second end cap 22, and the third end cap 23, which can fix the experimental chamber and ensure its safety during experiments with high-pressure gases.
[0057] In one embodiment, the drive rod 4 is a threaded rod with a threaded hole in the middle of the third end cap 23. The threaded rod is threaded into the threaded hole on the third end cap 23, and a handle or operating hole is provided at the end of the drive rod 4 away from the piston rod 32. The progressive movement of the screw drives the piston 31, thereby changing the volume of the gas to be measured. When the piston 31 moves slowly, the volume of the metered gas can be considered the sole influencing factor on the pressure. The rotation angle of the screw can be precisely controlled, controlling the propulsion of the piston rod 32, and thus precisely controlling the displacement of the piston 31. When the volume of the metered gas can be precisely and continuously controlled, its pressure can be precisely and continuously controlled. Furthermore, to prevent the threaded rod from unscrewing due to excessive rotation, a limit block 41 is provided at the end of the drive rod 4 near the piston rod 32.
[0058] In one embodiment, a heating wire is wound around the outer wall of the experimental chamber to adjust the temperature inside the gas experimental chamber. The heating system with the heating wire can dynamically adjust the power of the heating wire through an external control system, so that the internal temperature of the gas experimental chamber can be stably reached the set temperature.
[0059] In summary, the temperature, humidity, and pressure multi-parameter coupled gas experimental device of this invention with an embedded pressure sensor 81 reduces the volume of the experimental chamber 1, enhances the gas compression effect, and compared with the traditional experimental structure, this invention eliminates the pipeline connecting the pressure gauge, further reducing the volume inside the experimental chamber, and can achieve higher pressure under the same initial pressure and compression amount.
[0060] In addition, this invention avoids the condensation phenomenon of high dew point gases due to temperature reduction, expands the parameter range of the experimental device, and the structure of embedding the pressure sensor 81 in the end cap makes the surface temperature of the sensor similar to the temperature of the inner wall of other parts, avoiding the problem of high humidity gas condensing when it encounters the lower temperature of the pipe inner wall and the surface of the pressure sensor 81 in the traditional structure.
[0061] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.
Claims
1. A temperature-humidity-pressure multi-parameter coupled gas experimental device with an embedded air pressure sensor, characterized in that, The experimental cavity, the first end cover, the second end cover, the third end cover, the piston, the piston rod and the driving rod are included. The experimental cavity is fixedly arranged between the first end cover and the second end cover, and constitutes a closed gas experimental chamber. The third end cover is arranged on the side of the second end cover and is located on the side away from the experimental cavity, and the third end cover is fixedly connected with the second end cover through a pull rod. The piston is arranged in the experimental cavity and is in sliding contact with the inner side wall of the experimental cavity, and a sealing ring is arranged between the piston and the inner side wall of the experimental cavity. One end of the piston rod is fixedly connected with the piston, and the other end of the piston rod penetrates through the second end cover and extends to between the second end cover and the third end cover. The driving rod is arranged on the third end cover, the driving rod is coaxially arranged with the piston rod, the driving rod cooperates with the piston rod to control the position of the piston in the experimental cavity, and is used for changing the volume of the to-be-tested gas in the gas experimental chamber. A plug mounting hole with internal threads is arranged in the middle of the first end cover in the axial direction, the plug mounting hole penetrates through the opposite two side surfaces of the first end cover, at least two function holes are formed in the peripheral surface of the first end cover, each function hole is in communication with the plug mounting hole, the at least two function holes include a gas inlet and outlet and a sensor mounting hole, a pressure sensor is embedded in a pressure probe, the pressure probe is provided with external threads, the sensor mounting hole is a threaded hole, and the pressure probe is in threaded cooperation with the sensor mounting hole. 2.The temperature-humidity-pressure multi-parameter coupled gas experimental device according to claim 1, wherein, A sealing ring is arranged in the sensor mounting hole, the top end of the pressure probe is a flat surface, the top end of the pressure probe tightly abuts against the sealing ring in the sensor mounting hole, and the sealing ring is tightly pressed after the threaded rotation. 3.The temperature-humidity-pressure multi-parameter coupled gas experimental device according to claim 2, characterized in that, The pressure sensor adopts a heat-resistant pressure sensitive element. 4.The temperature-humidity-pressure multi-parameter coupled gas experimental device according to claim 1, wherein, The at least two function holes further include a gas guide hole, the gas guide hole is connected with a safety valve, and is used for ensuring the safety of the experiment.
5. The temperature-humidity-pressure multi-parameter coupled gas experimental device according to any one of claims 1 to 4, characterized in that, Each function hole is connected with the plug mounting hole through a gas connection channel arranged in the end cover, and is used for connecting the gas experimental chamber. 6.The temperature-humidity-pressure multi-parameter coupled gas experimental device according to claim 1, wherein, The first end cover and the second end cover are fixedly connected through a pull rod, mounting grooves are respectively formed in the opposite two side surfaces of the first end cover and the second end cover, the experimental cavity is in a hollow columnar shape, and both ends are open, and the two ends of the experimental cavity are clamped in the mounting grooves.
7. The temperature, humidity, pressure and multi-parameter coupled gas experimental device according to claim 6, characterized in that, A sealing ring is arranged in the mounting groove. 8.The temperature-humidity-pressure multi-parameter coupled gas experimental device according to claim 1, wherein, The driving rod is a threaded rod, a threaded hole is formed in the middle of the third end cover, the threaded rod is in threaded cooperation with the threaded hole in the third end cover, and a handle or an operation hole is arranged at the end of the driving rod away from the piston rod. 9.The temperature-humidity-pressure multi-parameter coupled gas experimental device according to claim 1, wherein, The plug mounting hole has internal threads, and is used for threadedly connecting an aviation plug.
10. The temperature, humidity, pressure and multi-parameter coupled gas experimental device according to claim 1, characterized in that, A heating wire is wound on the outer side wall of the experimental cavity, and is used for adjusting the temperature inside the gas experimental chamber.