Integrated front-end module and monitoring device for various toxic and harmful gases in underground space

Abstract

The application discloses an underground space multi-kind toxic and harmful gas integrated front-end module and a monitoring device. The underground space multi-kind toxic and harmful gas integrated front-end module and the monitoring device adopt the technical scheme that a filter element rotating wheel can adjust a used interference gas filter through rotation according to requirements, so that the detection interference can be eliminated, the detection precision and the detection speed can be improved, different kinds of toxic and harmful gases can be detected, the degree of integration is high, the volume is small, the portability is good, the operation is convenient, and the device is especially suitable for monitoring of the underground space multi-kind toxic and harmful gases.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground space toxic and harmful gas monitoring, and in particular to an integrated front-end module for underground space multiple toxic and harmful gas and a monitoring device. BACKGROUND

[0002] In today's society, the construction, civil engineering, mining and other industries are booming, which inevitably need to face the operation in narrow, closed or semi-closed space. In such space, toxic and harmful gases may be naturally accumulated due to excavation leakage, human exhalation, engineering instrument emission and other ways. Due to the poor air flow in the construction space, the concentration of such gases will increase over time and eventually exceed a certain safety threshold. Corrosive gases represented by water vapor and hydrogen sulfide not only affect the engineering instruments therein, causing faults such as precision decline and efficiency reduction, but also may cause damage to human skin and organs; gases represented by carbon oxides may cause the oxygen content in the operation space to be too low, thereby causing breathing difficulties, poisoning, syncope and other accidents; flammable and explosive gases represented by gas may react with instruments or other circuits, electric sparks or even open flames, thereby causing explosions, which have serious safety hazards.

[0003] In general, toxic and harmful gases in underground space will weaken the use and performance of engineering instruments from the hardware, pose a threat to engineering operation personnel, and also seriously threaten the safety of people's life and property. In order to ensure the normal, orderly, safe and efficient construction process, it is necessary to detect toxic and harmful gases in time and build the overall situation of underground space to give early warning before the formation of hidden dangers.

[0004] At present, the devices for detecting toxic and harmful gases on the market all have certain technical limitations and application limitations. First, a large number of high-precision gas detection devices currently exist have slow response speed and too large volume, which are not suitable for underground space; second, the existing portable or small detection platforms face problems such as single detection object, large detection interference, poor detection accuracy, high detection cost, low integration, and single detection function.

[0005] Through the research of the inventor team, the current mainstream detection scheme for toxic and harmful gases on the market is electrochemical detection and infrared spectrum detection. Considering that the spectral characteristics of gases are more significant than electrochemical characteristics, are not easily disturbed by external environmental factors, and can detect small changes in gas concentration, the inventor team hopes to develop a device for monitoring toxic and harmful gases in underground space based on infrared spectrum detection. SUMMARY

[0006] In order to solve the technical problems of the prior art that the high-precision gas detection device capable of detecting multiple toxic and harmful gases is not suitable for underground space, the portable detection platform has a single detection object and poor detection precision, the underground space multi-type toxic and harmful gas integrated front-end module and the monitoring device are provided.

[0007] The technical scheme is as follows:

[0008] The underground space multi-type toxic and harmful gas integrated front-end module comprises a mounting frame and a filter core assembly and a probe assembly which are mounted on the mounting frame.

[0009] When the rotating drive module drives the filter core rotating wheel to rotate, the corresponding wheel core mounting hole can be connected with the seal cover gas inlet pipe and the seal cover gas outlet pipe, so that the air filtered by the corresponding interference gas filter flows through the corresponding probe assembly.

[0010] The monitoring device comprises an infrared spectrum detector and the above-mentioned underground space multi-type toxic and harmful gas integrated front-end module, and each probe assembly is connected with the infrared spectrum detector.

[0011] Compared with the prior art, the underground space multi-type toxic and harmful gas integrated front-end module and the monitoring device have the following advantages:

[0012] The underground space multi-type toxic and harmful gas integrated front-end module and the monitoring device have the following advantages: BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a structural schematic view of the underground space multi-type toxic and harmful gas integrated front-end module;

[0014] Figure 2This is a schematic diagram of the filter element impeller from one perspective.

[0015] Figure 3 This is a structural schematic diagram of the filter element impeller from another perspective;

[0016] Figure 4 This is a schematic diagram of the probe assembly.

[0017] Figure 5 for Figure 4 A diagram showing the removal of the filter holder and the filter. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0019] like Figure 1 As shown, an integrated front-end module for multiple types of toxic and harmful gases in underground spaces mainly includes an installation frame 1 and filter element components and probe components 7, both installed on the installation frame 1. The filter element components are used to filter out interfering gases, and the probe components 7 are used to detect the concentration of the target toxic and harmful gases.

[0020] Please see Figures 1-3 The filter element assembly includes a filter element wheel 4 mounted on a mounting frame 1 via a rotating shaft 6, an inlet sealing cover 2 and an outlet sealing cover 3 respectively sealingly covering both ends of the filter element wheel 4, and a rotation drive module 5 for driving the filter element wheel 4 to rotate relative to the inlet sealing cover 2 and the outlet sealing cover 3. Specifically, the filter element wheel 4 can be rotatably mounted on the rotating shaft 6, which is fixedly mounted on the mounting frame 1; or it can be synchronously mounted on the rotating shaft 6, which is rotatably mounted on the frame 1. It should be noted that the filter element wheel 4 cannot move axially relative to the rotating shaft 6.

[0021] The filter element rotor 4 has circumferentially distributed through holes 4c around the rotating shaft 6. For ease of control, each through hole 4c is evenly distributed circumferentially around the rotating shaft 6. An interfering gas filter can be detachably installed in each through hole 4c. The inlet sealing cover 2 has at least one sealing cover inlet pipe 2a that can communicate with any of the through holes 4c. The outlet sealing cover 3 has sealing cover outlet pipes 3a that are respectively aligned with each sealing cover inlet pipe 2a. The outer end of each sealing cover outlet pipe 3a is connected to the probe assembly 7. When the rotation drive module 5 drives the filter element rotor 4 to rotate, the corresponding through hole 4c connects to each sealing cover inlet pipe 2a and sealing cover outlet pipe 3a, allowing the air filtered by the corresponding interfering gas filter to flow through the corresponding probe assembly 7.

[0022] Therefore, the filter wheel can adjust the interference gas filter according to the demand by rotating, so as to adjust the interference gas filter by adjusting the interference gas filter, so as to eliminate the detection interference, improve the detection precision and detection speed, and realize the detection of different kinds of toxic and harmful gases, high integration degree, small size, good portability, convenient operation, especially suitable for monitoring of various toxic and harmful gases in underground space.

[0023] In order to further reduce the measurement error and eliminate interference, the chemical absorption technology of electrochemical system is used as an auxiliary means, that is, referring to Figure 1 、 Figure 4 and Figure 5 , the probe assembly 7 comprises a mounting seat 7b communicated with the sealed cover gas outlet pipe 3a through the gas chamber inlet pipe 7a and an infrared spectrum probe 7c mounted in the mounting seat 7b. The inside of the mounting seat 7b has a gas chamber 7h communicated with the gas chamber inlet pipe 7a. The mounting seat 7b is provided with a gas chamber outlet pipe 7d communicated with the gas chamber 7h. The mounting seat 7b is rotatably mounted with a filter holder 7e. The filter holder 7e is mounted with a plurality of filters 7f distributed in the circumferential direction along the rotation axis. The mounting seat 7b is mounted with a rotation driving device 7g for driving the filter holder 7e to rotate. When the rotation driving device 7g drives the filter holder 7e to rotate, any filter 7f can be blocked between the infrared spectrum probe 7c and the gas chamber 7h. Covering the filter 7f in front of the infrared spectrum probe 7c can reduce the polarized light, filter the clutter, and shield a certain area of the waveform, thereby reducing the processing amount and intensity of the data and increasing the signal density and concentration. It should be pointed out that the filter 7f can be modified according to actual needs, such as optical inserts of glass, gem, lens, prism, etc., to meet the requirements of modular design, enhance adaptability, meet the needs of multiple related scenes, and increase personalized modification space.

[0024] In the embodiment, the filter holder 7e has a plurality of filter mounting rings 7e1 matched with the filters 7f respectively. Each filter 7f is mounted in the corresponding filter mounting ring 7e1. The mounting seat 7b is provided with a slit 7b1 matched with the filter mounting ring 7e1. The slit 7b1 is located between the gas chamber 7h and the infrared spectrum probe 7c. When the rotation driving device 7g drives the filter holder 7e to rotate, any filter mounting ring 7e1 can be sealingly inserted into the slit 7b1, so that the filter 7f thereon is blocked between the infrared spectrum probe 7c and the gas chamber 7h. It is simple, reliable, easy to control and has high switching efficiency. It should be pointed out that each filter 7f is mounted in the filter mounting ring 7e1 in a detachable manner, so as to facilitate replacement according to actual needs.

[0025] Further, the rotating driving device 7g is a micro motor, which occupies less space, makes the overall structure more compact, and improves portability and applicability.

[0026] Please see Figures 1-3 The filter core rotating wheel 4 is in a cylindrical structure, and a one-way rotating convex ring 4a is protruded on the outer circumferential surface of the filter core rotating wheel 4. The two side edges of the one-way rotating convex ring 4a are close to the two side edges of the air inlet sealing cover 2 and the air outlet sealing cover 3, and the side edge of the air inlet sealing cover 2 and the air outlet sealing cover 3 close to the one-way rotating convex ring 4a is provided with a plurality of one-way inclined teeth 8 which are uniformly distributed in a circumferential direction. The one-way inclined teeth 8 on the two side edges of the one-way rotating convex ring 4a are oppositely arranged one by one, and the one-way inclined teeth 8 on the side edge of the air inlet sealing cover 2 and the air outlet sealing cover 3 close to the one-way rotating convex ring 4a are matched with the one-way inclined teeth 8 on the two side edges of the one-way rotating convex ring 4a. The air inlet sealing cover 2 and the air outlet sealing cover 3 are provided with elastic elements 9 for driving the air inlet sealing cover 2 and the air outlet sealing cover 3 to be close to the one-way rotating convex ring 4a. The two sides of the tooth top of the one-way inclined tooth 8 include a vertical edge 8a and an inclined edge 8b. The extension direction of the vertical edge 8a is parallel to the rotating axis of the filter core rotating wheel 4, and the inclined edge 8b extends from the tooth top of the corresponding one-way inclined tooth 8 to the inner end of the vertical edge 8a of the adjacent one-way inclined tooth 8. Therefore, the rotating position of the filter core rotating wheel 4 can be accurately positioned through the cooperation of the one-way inclined teeth 8, so as to ensure that the corresponding wheel core mounting through hole 4c can accurately communicate with the sealing cover air inlet pipe 2a and the sealing cover air outlet pipe 3a, and the stability of the equipment operation is ensured.

[0027] Further, the two ends of the wheel core mounting through hole 4c are detachably embedded with filter core sealing rings 10, so as to ensure the sealing performance of the air inlet sealing cover 2 and the air outlet sealing cover 3 and the wheel core mounting through hole 4c, avoid air leakage, and ensure the measurement accuracy.

[0028] Meanwhile, the filter core sealing rings 10 located at the same end of the wheel core mounting through hole 4c can be integrally formed as one part, which not only facilitates quick assembly, but also can better ensure the overall sealing performance and avoid the situation that some filter core sealing rings 10 are not assembled in place when a plurality of parts are integrally installed.

[0029] Further, the tooth top of each one-way inclined tooth 8 of the one-way rotating convex ring 4a is located inside the corresponding end surface of the filter core rotating wheel 4, so that the air inlet sealing cover 2 and the air outlet sealing cover 3 will not be out of the filter core rotating wheel 4 at all times, and the stability of the cooperation of the three is ensured.

[0030] Further, please see Figure 1The elastic element 9 is a compression spring sleeved on the rotating shaft 6, the inner end of the compression spring is elastically supported on the air inlet sealing cover 2 or the air outlet sealing cover 3 respectively, and the outer end of the compression spring is elastically supported on the mounting frame 1, which is simple and reliable, easy to assemble, and ensures that the air inlet sealing cover 2 and the air outlet sealing cover 3 always have a tendency to be close to the one-way rotating convex ring 4a.

[0031] Please refer to Figure 1 The mounting frame 1 is a frame structure, which is convenient for mounting and arranging components while ensuring structural strength. The outer circumferential surface of the one-way rotating convex ring 4a is provided with a circle of secondary driven conical gear rings 4b. The rotating drive module 5 includes a driving motor 5a fixedly installed on the mounting frame 1 and a gear shaft 5b rotatably installed on the mounting frame 1. The extension direction of the motor shaft of the driving motor 5a is parallel to the rotating axis of the filter core rotating wheel 4 and is sleeved with a primary driving bevel gear 5c synchronously rotating. The extension direction of the gear shaft 5b is perpendicular to the extension direction of the motor shaft of the driving motor 5a. The two ends of the gear shaft 5b are respectively synchronously sleeved with a primary driven bevel gear 5d meshing with the primary driving bevel gear 5c and a secondary driving bevel gear 5e meshing with the secondary driven conical gear ring 4b. The motor shaft of the driving motor 5a drives the primary driving bevel gear 5c to synchronously rotate, the primary driving bevel gear 5c drives the primary driven bevel gear 5d to rotate, the primary driven bevel gear 5d drives the secondary driving bevel gear 5e to synchronously rotate through the gear shaft 5b, and the secondary driving bevel gear 5e drives the filter core rotating wheel 4 to rotate through the secondary driven conical gear ring 4b. The structure is not only stable and reliable, but also ensures the control precision of the rotation of the filter core rotating wheel 4 through the two-stage speed reduction transmission. Meanwhile, the overall structure is very compact, the space occupation is small, and it is suitable for narrow underground space.

[0032] Further, the air inlet ends of the sealing cover air inlet pipes 2a are connected with front flow meters 11, so as to obtain accurate air inlet amount and improve the precision of the calculation of the concentration of toxic and harmful gas.

[0033] In the embodiment, the design of the double-probe assembly 7 is preferred. Since different types of filters 7f can be selected for the two infrared spectrum probes 7c, the obtained absorption peaks will be different. The difference between the absorption peaks of the two infrared spectrum probes 7c is compared, and the type of the filter 7f is combined to quickly find out the characteristic gas. Further, the characteristic gas is taken as a reference to correct, so as to improve the precision of data processing.

[0034] A monitoring device includes an infrared spectrum detector (not shown in the figure) and the above-mentioned integrated front-end module for multiple types of toxic and harmful gases in underground space. Each probe assembly 7 is connected with the infrared spectrum detector.

[0035] The positioning of the monitoring device is to monitor the whole working environment in real time, and the operation mode can be simply summarized as N+1+X.N is N detection groups, each detection group is provided with two probes, one set of rotating wheel filter element, and is placed at intervals;1 is a processor, which can be replaced by a notebook computer or a professional engineering equipment;X is an output end, which can design an alarm threshold at the terminal, and the output end can be prewarned to protect the safety of personnel.

[0036] Among them, the monitoring device can be well connected to the Internet of Things, and the probe assembly 7 sends back the unprocessed raw data, thereby overcoming the problem of slow response speed;After the computer uniformly processes, the output end can be connected to the display system, the early warning system and even the workers' wearing equipment in the engineering site, so as to facilitate the engineering team to timely understand the gas phase, and if necessary, personnel can be organized to evacuate quickly and orderly, so as to ensure the safety of personnel.

[0037] The processing end first identifies and loads the individualized element of the probe according to the data, identifies the type of filter 7f in front of the infrared spectrum probe 7c, thereby confirming the type of interference gas filter and the type of gas shielding;Then read the measurement information of the infrared spectrum detector, and synchronize the information processing and display;Finally, the gas spectrum characteristics are compared to determine the concentration of each gas and generate the global gas concentration situation.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0041] Finally, it should be noted that the above description is only for the preferred embodiments of the present application, and those of ordinary skill in the art can make various similar modifications under the inspiration of the present application without departing from the purpose and scope of the present application, and such modifications fall within the protection scope of the present application.

Claims

1. An integrated front-end module for multiple types of toxic and harmful gases in underground spaces, characterized in that: The system includes a mounting frame (1) and a filter element assembly and a probe assembly (7) both mounted on the mounting frame (1). The filter element assembly includes a filter element wheel (4) mounted on the mounting frame (1) via a rotating shaft (6), an inlet sealing cover (2) and an outlet sealing cover (3) respectively sealingly covering both ends of the filter element wheel (4), and a rotation drive module (5) for driving the filter element wheel (4) to rotate relative to the inlet sealing cover (2) and the outlet sealing cover (3). The filter element wheel (4) has a circumferential opening. A wheel core mounting through hole (4c) is distributed around the rotating shaft (6). An interfering gas filter can be detachably installed in each wheel core mounting through hole (4c). The air inlet sealing cover (2) has at least one sealing cover air inlet pipe (2a) that can communicate with any wheel core mounting through hole (4c). The air outlet sealing cover (3) has sealing cover air outlet pipes (3a) that are respectively aligned with each sealing cover air inlet pipe (2a). The outer end of each sealing cover air outlet pipe (3a) is connected to the probe assembly (7). When the rotation drive module (5) drives the filter element wheel (4) to rotate, the corresponding wheel core mounting through hole (4c) can connect the air inlet pipe (2a) and the air outlet pipe (3a) of each sealing cover, so that the air filtered by the corresponding interference gas filter flows through the corresponding probe assembly (7). The filter element impeller (4) has a cylindrical structure. A one-way rotating convex ring (4a) protrudes from the outer circumference of the filter element impeller (4). The one-way rotating convex ring (4a) has one-way helical teeth (8) evenly distributed in a circumferential direction on both outer edges of the air inlet sealing cover (2) and the air outlet sealing cover (3), as well as on the outer edge of the air inlet sealing cover (2) and the air outlet sealing cover (3) near the one-way rotating convex ring (4a). Each one-way helical tooth on both outer edges of the one-way rotating convex ring (4a) (8) They are arranged in a one-to-one correspondence. The one-way helical teeth (8) on the outer edge of the air inlet sealing cover (2) and the air outlet sealing cover (3) near the one-way rotating convex ring (4a) are respectively adapted to the one-way helical teeth (8) on the outer edges of both sides of the one-way rotating convex ring (4a). The air inlet sealing cover (2) and the air outlet sealing cover (3) are provided with elastic elements (9) between the air inlet sealing cover (2) and the air outlet sealing cover (3) and the mounting frame (1) for driving the air inlet sealing cover (2) and the air outlet sealing cover (3) to approach the one-way rotating convex ring (4a). The unidirectional helical tooth (8) has a vertical side (8a) and a helical side (8b) on both sides of the tooth tip. The vertical side (8a) extends in a direction parallel to the rotation axis of the filter element wheel (4). The helical side (8b) extends obliquely from the tooth tip of the corresponding unidirectional helical tooth (8) to the inner end of the vertical side (8a) of the adjacent unidirectional helical tooth (8).

2. The integrated front-end module for multiple types of toxic and harmful gases in underground spaces according to claim 1, characterized in that: The probe assembly (7) includes a mounting base (7b) connected to a sealing cover outlet pipe (3a) via an air chamber inlet pipe (7a) and an infrared spectral probe (7c) mounted in the mounting base (7b). The mounting base (7b) has an air chamber (7h) connected to the air chamber inlet pipe (7a) inside. The mounting base (7b) is provided with an air chamber outlet pipe (7d) connected to the air chamber (7h). A filter holder (7e) is rotatably mounted on the mounting base (7b). A filter (7f) is mounted on the filter holder (7e) and circumferentially distributed along its rotation axis. A rotation drive device (7g) for driving the filter holder (7e) to rotate is mounted on the mounting base (7b). When the rotation drive (7g) drives the filter holder (7e) to rotate, any filter (7f) can be blocked between the infrared spectral probe (7c) and the gas chamber (7h).

3. The integrated front-end module for multiple types of toxic and harmful gases in underground spaces according to claim 2, characterized in that: The filter holder (7e) has filter mounting rings (7e1) that are adapted to each filter (7f), and each filter (7f) is installed in the corresponding filter mounting ring (7e1). The mounting base (7b) has a slot (7b1) adapted to the filter mounting ring (7e1), and the slot (7b1) is located between the gas chamber (7h) and the infrared spectral probe (7c). When the rotation drive (7g) drives the filter holder (7e) to rotate, either filter mounting ring (7e1) can be sealed into the slot (7b1) so that the filter on it... (7f) is blocked between the infrared spectral probe (7c) and the gas chamber (7h).

4. The integrated front-end module for multiple types of toxic and harmful gases in underground spaces according to claim 2 or 3, characterized in that: The rotation drive device (7g) is a micro motor.

5. The integrated front-end module for multiple types of toxic and harmful gases in underground spaces according to claim 1, characterized in that: The tooth tips of each unidirectional helical tooth (8) of the unidirectional rotating convex ring (4a) are located within the corresponding end face of the filter element wheel (4).

6. The integrated front-end module for multiple types of toxic and harmful gases in underground spaces according to claim 1, characterized in that: The outer circumferential surface of the unidirectional rotating convex ring (4a) has a secondary driven conical gear ring (4b). The rotation drive module (5) includes a drive motor (5a) fixedly mounted on the mounting frame (1) and a gear shaft (5b) rotatably mounted on the mounting frame (1). The extension direction of the motor shaft of the drive motor (5a) is parallel to the rotation axis of the filter element wheel (4), and a primary driving bevel gear (5c) is synchronously mounted on it. The extension direction of the gear shaft (5b) is perpendicular to the extension direction of the motor shaft of the drive motor (5a). At both ends of the gear shaft (5b), a primary driven bevel gear (5d) meshing with the primary driving bevel gear (5c) and a secondary driving bevel gear (5e) meshing with the secondary driven conical gear ring (4b) are synchronously mounted on it.

7. The integrated front-end module for multiple types of toxic and harmful gases in underground spaces according to claim 1, characterized in that: Both ends of the wheel core mounting through hole (4c) are detachably fitted with filter element sealing rings (10).

8. The integrated front-end module for multiple types of toxic and harmful gases in underground spaces according to claim 1, characterized in that: Each of the air inlet pipes (2a) of the sealing cap is connected to a pre-flow meter (11).

9. A monitoring device, characterized in that: It includes an infrared spectrometer and an integrated front-end module for various types of toxic and harmful gases in underground spaces as described in any one of claims 1-8, wherein each probe component (7) is connected to the infrared spectrometer.

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