Portable gas drainage multi-parameter measuring device and method

Abstract

The invention belongs to the technical field of mine gas drainage detection, and relates to a portable gas drainage multi-parameter measuring device and method.The device comprises a sampling probe assembly, a pipeline assembly, a parameter measuring module and a display module, and the sampling probe assembly is communicated with the parameter measuring module through the pipeline assembly; and the parameter measurement module is electrically connected with the display module so as to output an electric signal to the display module. The gas sampling mode is optimized, the probe rod with the diameter being only 6 mm is adopted, sharing of a flow sampling channel and a concentration sampling channel is ingeniously achieved, the purpose of integrated measurement is achieved, differential pressure and concentration measurement can be completed at a time after the sampling rod is inserted, the working efficiency is remarkably improved, and the measurement cost is reduced. And the on-off function of the electromagnetic valve is matched to effectively control opening and closing of a gas path, the channel sharing characteristic of the probe rod is perfectly matched, and the functionality and portability of the equipment are further optimized.

Description

Technical Field

[0001] The invention belongs to the technical field of mine gas drainage detection and relates to a portable gas drainage multi-parameter measuring device and method. Background Art

[0002] Coal mining operations present complex mine environments and numerous hazardous factors, with the potential hazards of methane being particularly prominent. Large quantities of methane, primarily methane, are often present within mines. If this methane is not promptly extracted and accumulates to a certain concentration within the mine, it can significantly reduce the oxygen content in the air, causing workers to suffocate due to lack of oxygen, posing a serious threat to their lives. Methane is also a flammable and explosive gas with a wide range of explosive limits. Once mixed with air at a certain ratio and ignited by energy sources such as fire or sparks, it can easily cause fires or even explosions. These accidents are often sudden and destructive, resulting in numerous casualties and serious damage to mine facilities. They can also lead to significant economic losses for coal mining companies and can even necessitate mine shutdowns and restructuring, impacting the normal supply of coal.

[0003] Given the significant impact of gas on mine safety, mine gas extraction is crucial. Accurately measuring the amount of gas extracted is a key component of this process. It provides accurate data support for optimizing and adjusting gas extraction systems and for safety assessments, and is an essential component of ensuring safe coal mine production.

[0004] At present, portable gas extraction multi-parameter measurement devices have been widely used in mine pipeline gas extraction detection. However, existing portable devices have many shortcomings. On the one hand, most portable devices have a single function, generally only having concentration measurement or flow measurement functions. In the actual measurement process, two sets of equipment are required to perform multiple separate measurements of concentration and flow, which not only makes the measurement work cumbersome and complicated, but also greatly reduces the measurement efficiency and brings many inconveniences to on-site operations. On the other hand, even if some devices can achieve integrated measurement of concentration and flow, they also have obvious defects. The probe rods of these devices are relatively thick, the product volume is large, and the overall weight is relatively bulky. They are not convenient for drilling and measuring operations, which increases the labor intensity of the staff. In addition, some products use thicker probe rods or orifice plate pressure sampling methods, which will cause a large pressure loss in the pipeline, thereby affecting the accuracy of the measurement and causing the measurement results to deviate from the actual situation.

[0005] In summary, the portable gas extraction multi-parameter measurement device in the prior art has deficiencies in portability and accuracy. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a portable gas extraction multi-parameter measuring device and method to solve the shortcomings of existing portable gas extraction multi-parameter measuring devices, so as to achieve the purpose of accurate, scientific and portability of multi-parameter detection of mine pipeline gas extraction.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A portable gas extraction multi-parameter measuring device includes a sampling probe assembly, a pipeline assembly, a parameter measurement module, and a display module. The sampling probe assembly is connected to the parameter measurement module through the pipeline assembly. The parameter measurement module is electrically connected to the display module to output an electrical signal to the display module.

[0009] The sampling probe assembly includes a probe rod and a filter device. The probe rod is a sandwich tube. A first air inlet connected to the outer tube is provided on the windward side of the probe rod, and a first air outlet connected to the inner tube is provided on the head end face of the probe rod.

[0010] The probe is fixedly connected to the bottom of the filter device, and is connected to the exhaust channel in the filter device through the exhaust connection port connected to the first exhaust port, and is connected to the filter cavity in the filter device through the air inlet connection port connected to the first air inlet, and the filter cavity is provided with an air outlet nozzle;

[0011] The pipeline assembly includes a sandwich air pipeline having an inner air inlet pipe and an outer air exhaust channel, and an air connector assembly is connected to both ends of the sandwich air pipeline, one side of the air connector assembly is provided with a second air inlet and a second air exhaust port that are independent of each other, and the other side is provided with a sandwich air pipe that is respectively connected to the second air inlet and the second air exhaust port, and the sandwich air pipeline is connected through the sandwich air pipe so that one end of the second air inlet and the second air exhaust port are respectively connected to the inner air inlet pipe and the outer air exhaust channel;

[0012] The parameter measurement module includes a parameter measurement circuit board, a pump, a solenoid valve, an air chamber, a concentration element, and a differential pressure element. The concentration element is arranged in the air chamber and electrically connected to the parameter measurement circuit board. The differential pressure element is arranged on the parameter measurement circuit board and electrically connected to the parameter measurement circuit board. The solenoid valve is connected to the pump and the air chamber in sequence.

[0013] The second air inlet of the air path connector assembly at one end of the pipeline assembly is connected to the air outlet nozzle, and the second air outlet is connected to the exhaust channel. The second air inlet of the air path connector assembly at the other end of the pipeline assembly is respectively connected to the solenoid valve and the high-pressure end of the differential pressure element, and the second air outlet is connected to the air chamber and the low-pressure end of the differential pressure element. The parameter measurement circuit board is electrically connected to the display module to output an electrical signal to the display module.

[0014] Wherein, when the solenoid valve forms a passage, the first air inlet, the filter cavity, the inner air inlet pipe, the solenoid valve, the pump, the air chamber, the outer exhaust channel, the exhaust channel and the first exhaust port form a circulating air path;

[0015] When the solenoid valve is closed, the first air inlet and the filter cavity are connected to the high-pressure end of the differential pressure element through the inner air inlet pipe, and the first exhaust port, the exhaust channel and the outer exhaust channel are connected to the low-pressure end of the differential pressure element, forming a differential pressure air path.

[0016] Furthermore, a flange is provided on the top of the probe rod, the air inlet connection port and the exhaust connection port are arranged on the flange, and the filter device is connected to the flange by fastening screws, and a first O-ring is provided between the flange and the filter device.

[0017] Furthermore, the filter cavity includes an air intake filter cavity and a secondary filter cavity, the air intake connection port is connected to the air intake filter cavity, and the secondary filter cavity is arranged on the top of the air intake filter cavity and is connected to the air intake filter cavity;

[0018] The secondary filter cavity includes a filter body, which includes a filter medium cavity. A breathable membrane is provided in the middle of the filter medium cavity to divide the filter medium cavity into an upper and lower part. The lower part of the filter medium cavity is connected to the air inlet filter cavity, and the upper part is connected to the air outlet nozzle to filter the intake air.

[0019] The filter device is also provided with a water outlet communicated with the air inlet filter chamber, and the water outlet is detachably sealed by a water outlet screw and a sealing ring.

[0020] Furthermore, the sampling probe assembly further includes a handle buckled on the filtering device, and the handle is provided with an air path connector mounting flange for mounting the air path connector assembly.

[0021] Furthermore, the handle is provided with a gripping anti-slip groove and a screw connecting column, and the screw connecting column is used to install the handle on the filtering device.

[0022] Furthermore, connecting nuts are provided at both ends of the sandwich air pipeline, the air path joint assembly includes a joint flange, the second air inlet and the second exhaust port are arranged on one side of the joint flange, the sandwich air pipe is arranged on the back of the mounting flange, and an air path connecting thread is provided on the outside of the sandwich air pipe to connect the connecting nuts.

[0023] Furthermore, the parameter measurement module assembly further includes a module housing and a module back cover and an air chamber cover arranged on both sides of the module housing, and the parameter measurement circuit board, pump, solenoid valve, air chamber, concentration element and differential pressure element are all arranged in the module housing;

[0024] The air chamber cover and the parameter measurement circuit board are sealed and connected to form the air chamber, and two air path interfaces respectively connected to the pump and the second exhaust port are provided on the parameter measurement circuit board.

[0025] Furthermore, the display module assembly consists of an outer shell, a back cover, a liquid crystal display, a display circuit board, a battery assembly and a button. The outer shell and the back cover are combined to form a shell. The liquid crystal display, the display circuit board and the battery assembly are arranged in the shell. The button is arranged on the display circuit board. The battery assembly is used to supply power to the display circuit board and the liquid crystal display. The display circuit board is electrically connected to the parameter measurement circuit board and the liquid crystal display, respectively, so as to display the signal of the parameter measurement module on the liquid crystal display.

[0026] Furthermore, three concentration elements are provided, and pressure elements are built into the concentration elements.

[0027] A portable gas extraction multi-parameter measurement method, using the portable gas extraction multi-parameter measurement device, specifically comprises the following steps:

[0028] Gas concentration and gas pressure measurement:

[0029] Insert the probe into the gas extraction pipeline, with the windward side of the probe facing the direction of gas flow. The solenoid valve forms a passage, and the pump is started to work. The gas in the gas extraction pipeline is drawn into the sampling probe assembly through the first air inlet, and after being filtered, is transported to the air chamber in the parameter measurement module through the pipeline assembly. The gas in the air chamber is discharged into the gas extraction pipeline through the outer exhaust channel, the exhaust channel, and the first exhaust port.

[0030] The three concentration elements of the gas chamber react chemically with the gas, thereby outputting different current signals to the parameter measurement circuit board respectively. In addition, the displacement change of the internal capacitance of the pressure element caused by the pressure generates an electrical signal and outputs it to the parameter measurement circuit board.

[0031] Gas drainage pipeline flow rate measurement:

[0032] Insert the probe into the gas extraction pipeline, and make the windward side of the probe face the direction of gas flow. The solenoid valve passage is closed, and the pump stops working. The gas in the gas extraction pipeline enters the sampling probe assembly through the first air inlet, and is transported to the high-pressure end of the differential pressure element through the pipeline assembly after being filtered. The gas in the gas extraction pipeline is connected to the low-pressure end of the differential pressure element through the first exhaust port, the exhaust channel, and the outer exhaust channel, thereby forming a differential pressure gas path.

[0033] The displacement change of the internal capacitance of the differential pressure element caused by the pressure difference generates an electrical signal and outputs it to the parameter measurement circuit board;

[0034] The parameter measurement circuit board outputs electrical signals to the display module to achieve measurement of gas concentration and gas pressure and measurement of flow rate of the gas extraction pipeline.

[0035] The beneficial effects of the present invention are:

[0036] By optimizing the gas sampling method and using a probe with a diameter of only 6mm, the present invention cleverly realizes the sharing of flow and concentration sampling channels, achieving the goal of integrated measurement. The significant advantages brought by this design include: first, only a 6mm small hole needs to be opened on the gas extraction pipeline to complete the installation, which greatly simplifies the operation process and improves portability; second, after the sampling rod is inserted, the differential pressure and concentration measurements can be completed at one time, which significantly improves work efficiency; in addition, the 6mm probe is designed based on the Pitot tube principle, which effectively reduces pressure loss and makes flow measurement more scientific and accurate. This integrated measurement method is not only easy to carry, but also ensures higher measurement accuracy, providing convenience for on-site applications.

[0037] The secondary filtration device is another highlight of this technical solution. By filtering impurities such as water vapor and coal dust, it effectively protects the gas path, reduces interference with measurements, and thus improves the accuracy of gas flow and concentration measurements. The device adopts a split design, equipped with a drain screw and a secondary filtration assembly, making cleaning and maintenance easier. This design not only extends the device's lifespan but also enhances its practicality, ensuring stable operation even in complex environments and meeting user demands for reliability and convenient maintenance.

[0038] The integrated design of the parameter measurement module and the display module further demonstrates the advantages of the present invention. The parameter measurement module integrates the air chamber, pressure concentration element, sampling pump, solenoid valve and processing circuit, and achieves a compact structure and high integration through airtight design, which helps to improve the portability of the product. The display module is equipped with an LCD screen and capacitive buttons, providing a friendly human-computer interaction experience; the capacitive buttons are protected by a transparent shell, which enhances the protective effect and improves the reliability and ease of use of the product. In addition, the on-off function of the solenoid valve effectively controls the opening and closing of the air circuit, perfectly adapting to the channel sharing characteristics of the probe rod, further optimizing the functionality and portability of the equipment.

[0039] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0041] Figure 1 This is a structural schematic diagram of a portable gas extraction multi-parameter measuring device in an embodiment;

[0042] Figure 2 Schematic diagram of the structure of the sampling probe assembly in the embodiment;

[0043] Figure 3 Schematic diagram of the structure of the probe in the embodiment;

[0044] Figure 4 Schematic diagram of the structure of the filtering device in the embodiment;

[0045] Figure 5 This is a schematic structural diagram of a secondary filter assembly in an embodiment;

[0046] Figure 6 This is a schematic structural diagram of a handle in an embodiment;

[0047] Figure 7 Schematic diagram of the structure of the gas circuit connector assembly in the embodiment;

[0048] Figure 8 Schematic diagram of the structure of the pipeline assembly in the embodiment;

[0049] Figure 9 Schematic diagram of the structure of the parameter measurement module in the embodiment;

[0050] Figure 10A schematic structural diagram of a display module in an embodiment;

[0051] Figure 11 Schematic diagram of a flow chart of a portable gas extraction multi-parameter measurement method in an embodiment.

[0052] Figure numerals: sampling probe assembly 1, pipeline assembly 2, parameter measurement module 3, display module 4, probe rod 5, filter device 6, handle 7, first O-ring 8, fastening screw 9, windward surface 10, first air inlet 11, head end surface 12, first exhaust port 13, flange 14, air inlet connection port 15, exhaust connection port 16, flow direction indicator 17, air inlet filter chamber 18, exhaust channel 19, drain port 20, drain screw 21, sealing ring 22, secondary filter chamber 23, air outlet nozzle 24, air outlet nozzle sealing ring 25, secondary filter assembly 26, filter body 27, sealing gasket 28, breathable membrane 29, pressing nut 30, filter medium chamber 31, surrounding vent 32, Second O-ring 33, handle body 34, handle cover 35, air path connector assembly 36, grip anti-slip groove 37, air path connector mounting flange 38, screw connecting column 39, connector flange 40, second air inlet 41, second exhaust port 42, back of connector flange 43, air path connecting thread 44, inner air inlet pipe 45, outer exhaust channel 46, connecting nut 47, module housing 48, module back cover 49, air chamber cover 50, parameter measurement circuit board 51, pump 52, solenoid valve 53, air chamber 54, concentration element 55, air path interface 56, housing 57, back cover 58, LCD screen 59, display circuit board 60, battery assembly 61, button 62, differential pressure element 63. DETAILED DESCRIPTION

[0053] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0054] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0055] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0056] See also Figures 1 to 10 , is a portable gas extraction multi-parameter measuring device, comprising a sampling probe assembly 1, a pipeline assembly 2, a parameter measurement module 3, and a display module 4. The sampling probe assembly 1 is connected to the parameter measurement module 3 through the pipeline assembly 2, and the parameter measurement module 3 is electrically connected to the display module 4 to output an electrical signal to the display module 4;

[0057] The sampling probe assembly 1 includes a probe rod 5 and a filter device 6. The probe rod 5 is a sandwich tube. A first air inlet 11 connected to the outer tube is provided on the windward side 10 of the probe rod, and a first air outlet 13 connected to the inner tube is provided on the head end face 12 of the probe rod.

[0058] The probe rod 5 is fixedly connected to the bottom of the filter device 6, and is connected to the exhaust channel 19 in the filter device through the exhaust connection port 16 connected to the first exhaust port, and is connected to the filter cavity in the filter device through the air inlet connection port 15 connected to the first air inlet. The filter cavity is provided with an air outlet nozzle 24;

[0059] The pipeline assembly includes a sandwich air pipeline having an inner air inlet pipe 45 and an outer air exhaust channel 46, and an air connector assembly 36 is connected to both ends of the sandwich air pipeline. One side of the air connector assembly is provided with a second air inlet 41 and a second air exhaust port 42 that are independent of each other, and the other side is provided with a sandwich air pipe that is respectively connected to the second air inlet and the second air exhaust port. The sandwich air pipeline is connected through the sandwich air pipe so that one end of the second air inlet and the second air exhaust port are respectively connected to the inner air inlet pipe and the outer air exhaust channel;

[0060] The parameter measurement module includes a parameter measurement circuit board 51, a pump 52, a solenoid valve 53, an air chamber 54, a concentration element 55, and a differential pressure element 63. The concentration element is arranged in the air chamber and electrically connected to the parameter measurement circuit board. The differential pressure element is arranged on the parameter measurement circuit board and electrically connected to the parameter measurement circuit board. The solenoid valve is connected to the pump and the air chamber in sequence.

[0061] The second air inlet of the air path connector assembly at one end of the pipeline assembly is connected to the air outlet nozzle 24, and the second air outlet is connected to the exhaust channel 19. The second air inlet of the air path connector assembly at the other end of the pipeline assembly is respectively connected to the solenoid valve and the high-pressure end of the differential pressure element, and the second air outlet is connected to the air chamber and the low-pressure end of the differential pressure element 63. The parameter measurement circuit board is electrically connected to the display module to output an electrical signal to the display module 4.

[0062] Wherein, when the solenoid valve forms a passage, the first air inlet, the filter cavity, the inner air inlet pipe, the solenoid valve, the pump, the air chamber, the outer exhaust channel, the exhaust channel and the first exhaust port form a circulating air path;

[0063] When the solenoid valve is closed, the first air inlet and the filter cavity are connected to the high-pressure end of the differential pressure element through the inner air inlet pipe, and the first exhaust port, the exhaust channel and the outer exhaust channel are connected to the low-pressure end of the differential pressure element, forming a differential pressure air path.

[0064] Furthermore, a flange 14 is provided at the top of the probe rod, the air inlet connection port and the exhaust connection port are arranged on the flange, and the filter device is connected to the flange through fastening screws 9, and a first O-ring 8 is provided between the flange and the filter device.

[0065] Furthermore, the filter chamber includes an air inlet filter chamber 18 and a secondary filter chamber 23, the air inlet connection port is connected to the air inlet filter chamber, and the secondary filter chamber is arranged on the top of the air inlet filter chamber and is connected to the air inlet filter chamber;

[0066] The secondary filter cavity includes a filter body 27, which includes a filter medium cavity 31. A breathable membrane 29 is provided in the middle of the filter medium cavity to divide the filter medium cavity into an upper and lower part. The lower part of the filter medium cavity is connected to the air inlet filter cavity, and the upper part is connected to the air outlet nozzle to filter the intake air.

[0067] The filter device is further provided with a water outlet 20 connected to the air inlet filter chamber. The water outlet is detachably sealed by a water outlet screw 21 and a sealing ring 22.

[0068] Furthermore, the sampling probe assembly further comprises a handle 7 buckled on the filtering device, and an air path connector mounting flange 38 is provided on the handle for mounting the air path connector assembly.

[0069] Furthermore, the handle is provided with a gripping anti-slip groove 37 and a screw connection column 39, and the screw connection column is used to install the handle on the filtering device.

[0070] Furthermore, connecting nuts 47 are provided at both ends of the sandwich air pipeline, the air path joint assembly includes a joint flange 40, the second air inlet and the second exhaust port are arranged on one side of the joint flange, the sandwich air pipe is arranged on the back side 43 of the mounting flange, and an air path connecting thread 44 connected to the back side 43 of the mounting flange is provided on the outside of the sandwich air pipe to connect the connecting nut 47.

[0071] Furthermore, the parameter measurement module assembly further includes a module housing 48 and a module back cover 49 and an air chamber cover 50 arranged on both sides of the module housing. The parameter measurement circuit board, pump, solenoid valve, air chamber, concentration element and differential pressure element are all arranged in the module housing.

[0072] The air chamber cover 50 and the parameter measurement circuit board 51 are sealed and connected to form the air chamber, and two air path interfaces respectively connected to the pump and the second exhaust port are provided on the parameter measurement circuit board.

[0073] Furthermore, the display module assembly is composed of an outer shell 57, a back cover 58, a liquid crystal display screen 59, a display circuit board 60, a battery assembly 61 and a button 62. The outer shell and the back cover are combined to form a shell. The liquid crystal display screen, the display circuit board and the battery assembly are arranged in the shell. The button is arranged on the outer shell and electrically connected to the display circuit board. The battery assembly is used to supply power to the display circuit board and the liquid crystal display screen. The display circuit board is electrically connected to the parameter measurement circuit board and the liquid crystal display screen, respectively, so as to display the signal of the parameter measurement module on the liquid crystal display screen.

[0074] Furthermore, three concentration elements are provided, and pressure elements are built into the concentration elements.

[0075] Example 1: Portable gas extraction multi-parameter measurement device

[0076] This embodiment provides a portable gas extraction multi-parameter measuring device for measuring the concentration, pressure and flow rate of gas in mine pipelines. Figure 1 As shown, the device includes a sampling probe assembly 1, a pipeline assembly 2, a parameter measurement module 3, and a display module 4. The sampling probe assembly 1 is connected to the parameter measurement module 3 through the pipeline assembly 2, and the parameter measurement module 3 is electrically connected to the display module 4 for transmitting the measurement signal to the display module 4 for display.

[0077] The structure of the sampling probe assembly is as follows:

[0078] like Figure 2 and Figure 3As shown, the sampling probe assembly 1 includes a probe rod 5, a filter device 6, and a handle 7. The probe rod 5 is a sandwich tube with a diameter of only 6 mm and is designed using the Pitot tube principle. The windward side 10 of the probe rod 5 is provided with a first air inlet 11, which is connected to the outer tube; the head end face 12 is provided with a first exhaust port 13, which is connected to the inner tube. The top of the probe rod 5 is connected to the filter device 6 via a flange 14. The flange 14 is provided with an air inlet connection port 15 and an exhaust connection port 16 and is secured by fastening screws 9. A first O-ring 8 is provided between the flange 14 and the filter device 6 to ensure airtightness.

[0079] Furthermore, a flow direction mark 17 is provided on the flange 14 to mark the direction.

[0080] like Figure 4 As shown, the filter device 6 is provided with an air intake filter chamber 18 and an exhaust channel 19. The air intake connection port 15 is connected to the air intake filter chamber 18, and the exhaust connection port 16 is connected to the exhaust channel 19. A drain port 20 is provided at the bottom of the air intake filter chamber 18, and the discharge of water is controlled by a drain screw 21 and a sealing ring 22. The filter device 6 also includes a secondary filter chamber 23, which is located at the top of the air intake filter chamber 18 and is connected thereto, for further filtering the gas. Figure 5 As shown, a secondary filter assembly 26 is housed within the secondary filter chamber 23. This assembly comprises a filter body 27, a sealing gasket 28, a breathable membrane 29, and a compression nut 30. Within the filter body 27 lies a filter medium chamber 31, divided into two sections by the breathable membrane 29: the lower section connects to the inlet filter chamber 18, and the upper section connects to the outlet nozzle 24. The outlet nozzle 24 is provided with a nozzle seal 25 to ensure a tight seal.

[0081] Specifically, the sealing gasket 28 and the compression nut 30 are arranged on both sides of the breathable membrane 29 to install the breathable membrane 29 in the middle of the filter medium cavity 31; the filter body 27 is an embedded structure, and a surrounding vent 32 is provided at the upper part of the filter medium cavity 31. The surrounding vent 32 is connected to the air outlet nozzle 24, so that the air outlet nozzle 24 is connected to the filter medium cavity 31;

[0082] Furthermore, the air outlet nozzle 24 is fixedly mounted on the filter device 6 , and an air outlet nozzle sealing ring 25 is provided at the connection between the air outlet nozzle 24 and the filter device 6 , and a second O-ring 33 is provided at the connection between the top of the filter body 27 and the filter device 6 .

[0083] like Figure 6 As shown, the handle 7 is buckled on the filter device 6 and includes a grip anti-slip groove 37, an air path connector mounting flange 38 and a screw connection column 39. The screw connection column 39 is used to fix the handle 7, and the air path connector mounting flange 38 is used to connect the air path connector assembly 36.

[0084] Specifically, the handle 7 consists of a handle body 34 and a handle cover 35 installed on the handle body 34. The gripping anti-slip groove 37 and the air path joint mounting flange 38 are both installed on the handle body 34. The handle cover 35 is provided with a screw hole matching the screw connecting column 39 to install the handle cover 35 on the handle body 34 while fixing the handle body 34.

[0085] The structure of the pipeline assembly is as follows:

[0086] like Figure 7 and Figure 8 As shown, the pipe assembly 2 is a sandwich gas pipeline, including an inner air inlet pipe 45 and an outer air outlet channel 46. Both ends of the pipe are connected to the gas connector assembly 36 via connecting nuts 47. The gas connector assembly 36 includes a connector flange 40, one side of which is provided with an independent second air inlet port 41 and second air outlet port 42, and the other side is provided with a sandwich gas pipe connecting the two. The outer side of the sandwich gas pipe has a gas connection thread 44, which is connected to the connecting nut 47.

[0087] Specifically, the sandwich air pipe matches the sandwich air path pipeline, so that the second air inlet 41 and the second air outlet 42 are connected to the inner air inlet pipe 45 and the outer air outlet 46 respectively.

[0088] The structure of the parameter measurement module is as follows:

[0089] like Figure 9 As shown, the parameter measurement module 3 includes a module housing 48, a module back cover 49, an air chamber cover 50, a parameter measurement circuit board 51, a pump 52, a solenoid valve 53, an air chamber 54, a concentration element 55, and a differential pressure element 63. These components are all arranged within the module housing 48. The air chamber cover 50 is sealedly connected to the parameter measurement circuit board 51 to form an air chamber 54. The circuit board 51 is provided with two air path interfaces 56, which respectively connect to the pump 52 and the second exhaust port 42. The concentration element 55 is arranged in the air chamber 54, and the differential pressure element 63 is arranged on the circuit board 51. Both are electrically connected to the circuit board 51. The solenoid valve 53 connects the pump 52 and the air chamber 54 in sequence.

[0090] The air path connector assembly 36 at one end of the pipeline assembly 2 is connected to the air outlet nozzle 24 through the second air inlet 41, and the second exhaust port 42 is connected to the exhaust channel 19; the second air inlet 41 at the other end is connected to the high-pressure end of the solenoid valve 53 and the differential pressure element 63, and the second exhaust port 42 is connected to the air chamber 54 and the low-pressure end of the differential pressure element 63.

[0091] The structure of the display module is as follows:

[0092] like Figure 10As shown, the display module 4 includes a housing 57, a rear cover 58, an LCD screen 59, a display circuit board 60, a battery assembly 61, and a button 62. The housing 57 and rear cover 58 form a casing that houses the LCD screen 59, display circuit board 60, and battery assembly 61. The button 62 is located on the housing 57 and is electrically connected to the display circuit board 60. The battery assembly 61 provides power to the display module. The display circuit board 60 is electrically connected to the parameter measurement circuit board 51 and the LCD screen 59 to display measurement results on the screen.

[0093] Specifically, the button 62 is a capacitive button, and the shell 57 is a transparent shell. While being able to clearly see and operate the capacitive button, it also protects the capacitive button, achieving better protection effect, thereby improving product reliability and ease of use.

[0094] In this embodiment, three concentration elements 55 are provided, along with a built-in pressure element, enabling simultaneous measurement of gas concentration and pressure. The device utilizes a 6mm probe for integrated measurement, resulting in a compact and highly portable design.

[0095] Example 2: Portable gas extraction multi-parameter measurement method

[0096] This embodiment provides a measurement method based on the device of embodiment 1, which is used to measure the gas concentration, pressure and flow rate in the mine pipeline. Figure 11 As shown, the method includes the following steps:

[0097] Step 1: Measurement of gas concentration and pressure

[0098] Insert the probe 5 into the gas extraction pipe, ensuring that the windward side 10 faces the direction of gas flow.

[0099] The electromagnetic valve 53 is controlled to form a passage, and the pump 52 is started. Gas enters from the first air inlet 11, is filtered by the air inlet filter chamber 18 and the secondary filter chamber 23, and then enters the air chamber 54 through the inner air inlet pipe 45.

[0100] In the gas chamber 54, three concentration elements 55 react chemically with the gas, outputting different current signals to the parameter measurement circuit board 51. At the same time, the built-in pressure element generates an electrical signal due to pressure changes and transmits it to the circuit board 51.

[0101] The measured gas is discharged to the pipeline through the outer exhaust channel 46, the exhaust channel 19 and the first exhaust port 13.

[0102] Step 2: Gas flow rate measurement

[0103] Insert the probe 5 into the pipeline with the windward side 10 facing the gas flow direction.

[0104] Close solenoid valve 53 and stop pump 52. Gas enters through first air inlet 11, is filtered, and then flows through inner air inlet pipe 45 to the high-pressure end of differential pressure element 63. Simultaneously, gas flows from first exhaust port 13 through exhaust passage 19 and outer exhaust passage 46 to the low-pressure end of differential pressure element 63, forming a differential pressure gas circuit.

[0105] The differential pressure element 63 generates an electrical signal due to the pressure difference and transmits the electrical signal to the parameter measurement circuit board 51 .

[0106] Step 3: Results display

[0107] The parameter measurement circuit board 51 transmits the electrical signals of concentration, pressure and flow rate to the display circuit board 60 of the display module 4, which are displayed on the liquid crystal display 59 after processing. The user can view the various results by pressing the button 62.

[0108] This method uses a solenoid valve to control the gas flow, achieving integrated measurement of concentration, pressure, and flow rate. The probe reduces pressure loss, and two-stage filtration ensures measurement accuracy. It is simple to operate and highly portable.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A portable gas extraction multi-parameter measuring device, characterized by: It includes a sampling probe assembly, a pipeline assembly, a parameter measurement module, and a display module. The sampling probe assembly is connected to the parameter measurement module through the pipeline assembly. The parameter measurement module is electrically connected to the display module to output an electrical signal to the display module. The sampling probe assembly includes a probe rod and a filter device. The probe rod is a sandwich tube. A first air inlet connected to the outer tube is provided on the windward side of the probe rod, and a first air outlet connected to the inner tube is provided on the head end face of the probe rod. The probe is fixedly connected to the bottom of the filter device, and is connected to the exhaust channel in the filter device through the exhaust connection port connected to the first exhaust port, and is connected to the filter cavity in the filter device through the air inlet connection port connected to the first air inlet, and the filter cavity is provided with an air outlet nozzle; The pipeline assembly includes a sandwich air pipeline having an inner air inlet pipe and an outer air exhaust channel, and an air connector assembly is connected to both ends of the sandwich air pipeline, one side of the air connector assembly is provided with a second air inlet and a second air exhaust port that are independent of each other, and the other side is provided with a sandwich air pipe that is respectively connected to the second air inlet and the second air exhaust port, and the sandwich air pipeline is connected through the sandwich air pipe so that one end of the second air inlet and the second air exhaust port are respectively connected to the inner air inlet pipe and the outer air exhaust channel; The parameter measurement module includes a parameter measurement circuit board, a pump, a solenoid valve, an air chamber, a concentration element, and a differential pressure element. The concentration element is arranged in the air chamber and electrically connected to the parameter measurement circuit board. The differential pressure element is arranged on the parameter measurement circuit board and electrically connected to the parameter measurement circuit board. The solenoid valve is connected to the pump and the air chamber in sequence. The second air inlet of the air path connector assembly at one end of the pipeline assembly is connected to the air outlet nozzle, and the second air outlet is connected to the exhaust channel. The second air inlet of the air path connector assembly at the other end of the pipeline assembly is respectively connected to the solenoid valve and the high-pressure end of the differential pressure element, and the second air outlet is connected to the air chamber and the low-pressure end of the differential pressure element. The parameter measurement circuit board is electrically connected to the display module to output an electrical signal to the display module. Wherein, when the solenoid valve forms a passage, the first air inlet, the filter cavity, the inner air inlet pipe, the solenoid valve, the pump, the air chamber, the outer exhaust channel, the exhaust channel and the first exhaust port form a circulating air path; When the solenoid valve is closed, the first air inlet and the filter cavity are connected to the high-pressure end of the differential pressure element through the inner air inlet pipe, and the first exhaust port, the exhaust channel and the outer exhaust channel are connected to the low-pressure end of the differential pressure element, forming a differential pressure air path.

2. The portable gas extraction multi-parameter measuring device according to claim 1, characterized in that: A flange is provided on the top of the probe rod, the air inlet connection port and the exhaust connection port are arranged on the flange, and the filter device is connected to the flange by fastening screws, and a first O-ring is provided between the flange and the filter device.

3. The portable gas extraction multi-parameter measuring device according to claim 1, characterized in that: The filter cavity includes an air inlet filter cavity and a secondary filter cavity, the air inlet connection port is connected to the air inlet filter cavity, and the secondary filter cavity is arranged on the top of the air inlet filter cavity and is connected to the air inlet filter cavity; The secondary filter cavity includes a filter body, which includes a filter medium cavity. A breathable membrane is provided in the middle of the filter medium cavity to divide the filter medium cavity into an upper and lower part. The lower part of the filter medium cavity is connected to the air inlet filter cavity, and the upper part is connected to the air outlet nozzle to filter the intake air. The filter device is also provided with a water outlet communicated with the air inlet filter chamber, and the water outlet is detachably sealed by a water outlet screw and a sealing ring.

4. The portable gas extraction multi-parameter measuring device according to claim 1, characterized in that: The sampling probe assembly further comprises a handle buckled on the filter device, and the handle is provided with an air path connector mounting flange for mounting the air path connector assembly.

5. The portable gas extraction multi-parameter measuring device according to claim 4 is characterized in that: The handle is also provided with a gripping anti-slip groove and a screw connecting column, and the screw connecting column is used to install the handle on the filtering device.

6. The portable gas extraction multi-parameter measuring device according to claim 1, characterized in that: Connecting nuts are provided at both ends of the sandwich air pipeline, the air path joint assembly includes a joint flange, the second air inlet and the second exhaust port are arranged on one side of the joint flange, the sandwich air pipe is arranged on the back of the mounting flange, and an air path connecting thread is provided on the outside of the sandwich air pipe to connect the connecting nuts.

7. The portable gas extraction multi-parameter measuring device according to claim 1, characterized in that: The parameter measurement module assembly further includes a module housing, a module back cover and an air chamber cover arranged on both sides of the module housing, and the parameter measurement circuit board, pump, solenoid valve, air chamber, concentration element and differential pressure element are all arranged in the module housing; The air chamber cover and the parameter measurement circuit board are sealed and connected to form the air chamber, and two air path interfaces respectively connected to the pump and the second exhaust port are provided on the parameter measurement circuit board.

8. The portable gas extraction multi-parameter measuring device according to claim 1, characterized in that: The display module assembly consists of an outer shell, a back cover, a liquid crystal display, a display circuit board, a battery assembly and a button. The outer shell and the back cover are combined to form a shell. The liquid crystal display, display circuit board and battery assembly are arranged in the shell. The button is arranged on the display circuit board. The battery assembly is used to supply power to the display circuit board and the liquid crystal display. The display circuit board is electrically connected to the parameter measurement circuit board and the liquid crystal display, respectively, so as to display the signal of the parameter measurement module on the liquid crystal display.

9. The portable gas extraction multi-parameter measuring device according to claims 1 to 8, characterized in that: The concentration elements are provided in three numbers, and pressure elements are built into the concentration elements.

10. A portable gas drainage multi-parameter measurement method, characterized in that: The portable gas drainage multi-parameter measuring device according to claim 9 specifically includes the following steps: Gas concentration and gas pressure measurement: Insert the probe into the gas extraction pipeline, with the windward side of the probe facing the direction of gas flow. The solenoid valve forms a passage, and the pump is started to work. The gas in the gas extraction pipeline is drawn into the sampling probe assembly through the first air inlet, and after being filtered, is transported to the air chamber in the parameter measurement module through the pipeline assembly. The gas in the air chamber is discharged into the gas extraction pipeline through the outer exhaust channel, the exhaust channel, and the first exhaust port. The three concentration elements of the gas chamber react chemically with the gas, thereby outputting different current signals to the parameter measurement circuit board respectively. In addition, the displacement change of the internal capacitance of the pressure element caused by the pressure generates an electrical signal and outputs it to the parameter measurement circuit board. Gas drainage pipeline flow rate measurement: Insert the probe into the gas extraction pipeline, and make the windward side of the probe face the direction of gas flow. The solenoid valve passage is closed, and the pump stops working. The gas in the gas extraction pipeline enters the sampling probe assembly through the first air inlet, and is transported to the high-pressure end of the differential pressure element through the pipeline assembly after being filtered. The gas in the gas extraction pipeline is connected to the low-pressure end of the differential pressure element through the first exhaust port, the exhaust channel, and the outer exhaust channel, thereby forming a differential pressure gas path. The displacement change of the internal capacitance of the differential pressure element caused by the pressure difference generates an electrical signal and outputs it to the parameter measurement circuit board; The parameter measurement circuit board outputs electrical signals to the display module to achieve measurement of gas concentration and gas pressure and measurement of flow rate of the gas extraction pipeline.

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