On-line monitoring and alarming device for harmful gas in engineering environment air and monitoring method of on-line monitoring and alarming device

Abstract

The invention discloses an on-line monitoring and alarming device for harmful gas in engineering environment air and a monitoring method of the on-line monitoring and alarming device, and belongs to the technical field of air monitoring. An on-line monitoring and alarming device for harmful gas in engineering environment air comprises an annular shell, a collecting pipe is arranged on the annular shell, openings in the two ends of the collecting pipe are each provided with a filter screen, a detecting pipe is arranged in the collecting pipe, an air monitoring assembly and an air flow sensor are arranged in the detecting pipe, and a miniature fan is arranged in the collecting pipe. A turning assembly used for adjusting the position of the micro fan is arranged on the annular shell, cleaning assemblies used for cleaning impurities on the filter screen are arranged at the two ends of the collecting pipe, the turning assembly is connected with the cleaning assemblies, and a mounting shell is arranged on the outer side of the annular shell; through cooperation of the turning assembly and the cleaning assembly, impurities on the filter screen at the opening of the collecting pipe are effectively treated, the situation that the filter screen is blocked to affect the gas collecting effect is avoided, and then the monitoring efficiency and monitoring effect of harmful gas in air are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air monitoring, and in particular to an online monitoring and alarm device for harmful gases in engineering environment air and a monitoring method thereof. Background Art

[0002] At present, in the process of industrial production, some places need to monitor air quality to solve the problem of air pollution. In the places that need to be monitored, there are a large number of toxic and harmful gaseous pollutants in the air. These gaseous pollutants exist in molecular state, most of which are inorganic gases. Long-term exposure to such polluted environment will cause serious harm to human health. It is necessary to monitor the air in the working environment in real time and give early warning.

[0003] An automatic detection and alarm device for harmful gases has a micro-exhaust fan fixedly installed at the vent to speed up the gas circulation speed, thereby improving the sensitivity and efficiency of detection and achieving early warning. However, in actual use, the vent will have air flow entering it for a long time. Although impurities and dust in the air flow can be intercepted by the filter, a large amount of impurities will accumulate on the filter, which will affect the device's suction effect on the air flow, thereby reducing the gas monitoring effect. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose an online monitoring and alarm device for harmful gases in the air of an engineering environment and a monitoring method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An online monitoring and alarm device for harmful gases in engineering environment air comprises an annular shell, a collection tube is arranged on the annular shell, filter screens are arranged at both end openings of the collection tube, a detection tube is arranged in the collection tube, an air monitoring assembly and an air flow sensor are arranged in the detection tube, a micro fan is arranged in the collection tube, a turning component for adjusting the position of the micro fan is arranged on the annular shell, cleaning components for cleaning impurities on the filter screen are arranged at both ends of the collection tube, the turning component is connected to the cleaning component, a mounting shell is arranged on the outside of the annular shell, a circuit board electrically connected to the air flow sensor is fixedly arranged inside the mounting shell, and a display screen and a speaker are arranged on the outside of the mounting shell.

[0007] Preferably, the rotation assembly includes support plates fixedly mounted on both sides of the inner wall of the mounting shell, both support plates are rotatably connected to a rotating rod, one of the support plates is fixedly provided with a driving motor for driving the rotating rod to rotate, a main bevel gear is arranged on the rotating rod, a bevel gear ring is meshingly connected to the outer side of the main bevel gear, a rotating plate fixedly connected to the bevel gear ring is rotatably connected to the annular shell, and a support connected to the micro fan is fixedly provided on the rotating plate.

[0008] Preferably, a groove communicating with the annular shell is provided on the collecting tube, and an arc-shaped partition for sealing the groove is fixedly provided on the rotating plate.

[0009] Preferably, the cleaning assembly includes a pneumatic tube fixed in the mounting shell, the pneumatic tube and the central axis of the rotating rod are in the same straight line, and the pneumatic tube is sleeved on the outside of the rotating rod, a piston is slidably connected between the inner wall of the pneumatic tube and the outer wall of the rotating rod, an air inlet valve and an air outlet valve are provided on the pneumatic tube, the pneumatic tube is connected to an air inlet pipe connected to the inner cavity of the collection tube through the air inlet valve, the pneumatic tube is connected to an air outlet pipe through the air outlet valve, the end of the air outlet pipe away from the pneumatic tube passes through the collection tube and is connected to an air guide tube, and a plurality of nozzle heads are equidistantly provided on the air guide tube.

[0010] Preferably, the cleaning assembly also includes a first reciprocating screw fixedly connected to the rotating rod, a first sleeve is threadedly connected to the first reciprocating screw, a push rod is fixed to the first sleeve, and one end of the push rod away from the first sleeve passes through the pneumatic tube and is connected to the piston.

[0011] Preferably, a rotating tube is rotatably connected inside the collection tube, and the nozzle head is rotatably connected to the rotating tube through a pin shaft, and a torsion spring for driving the nozzle head to reset and rotate is provided on the pin shaft. The nozzle head includes a nozzle body rotatably connected to the rotating tube and a connecting hose connected between the nozzle body and the air guide tube, a driven gear is provided on the top of the rotating tube, and a rack plate is meshedly connected to the outer side of the driven gear, and a connecting rod is provided between the first sleeve and the rack plate.

[0012] Preferably, a connecting seat is fixedly provided on the outer side of the rotating tube, the air guide tube is slidably connected to the connecting seat, a reel is provided on the rotating tube, a pull rope is wound around the reel, and the end of the pull rope away from the reel passes through the collection tube and is connected to the top of the air guide tube.

[0013] Preferably, a second reciprocating screw is rotatably connected in the collection tube, a movable gear meshing with the driven gear is arranged on the top of the second reciprocating screw, the movable gear adopts a flywheel structure, a second sleeve is threadedly connected to the second reciprocating screw, an abutment block that abuts against the filter screen is rotatably connected to the second sleeve, a side plate is fixed on the rotating tube, and a guide rod slidably connected to the abutment block is fixed on the side plate.

[0014] Preferably, the air monitoring assembly includes a smoke sensor, an alcohol sensor, a carbon dioxide sensor and a carbon monoxide sensor, and the air monitoring assembly is electrically connected to a circuit board.

[0015] The present invention also discloses a monitoring method of an online monitoring and alarm device for harmful gases in engineering environment air, which further comprises the following steps:

[0016] S1: Control the operation of the micro fan, which draws air through the opening at the end of the collection tube. The drawn air passes through the filter to remove impurities and then enters the detection tube. The air monitoring assembly in the detection tube detects harmful gases in the air, and the detected air is discharged from the opening at the other end of the collection tube.

[0017] S2: As the micro fan continues to work, the air flow sensor detects that the air flow entering the collection tube is reduced to a preset value, and impurities are accumulated on the filter at the air inlet opening of the collection tube. The drive motor is controlled to operate, and the output shaft of the drive motor drives the rotating rod to rotate. The main bevel gear on the rotating rod is meshed with the bevel gear ring for transmission. The bevel gear ring drives the micro fan to move through the rotating plate, and the micro fan moves along the annular shell, so that the micro fan moves from the original air inlet port position of the collection tube to the original air outlet port position;

[0018] S3: When the rotating rod rotates, it drives the first reciprocating screw to rotate, and the first sleeve reciprocates along the axial direction of the first reciprocating screw. The first sleeve drives the piston to reciprocate in the pneumatic tube through the push rod. The pneumatic tube sucks the air in the collection tube through the air inlet pipe and discharges the air to the air guide pipe through the air outlet pipe. The air guide pipe discharges the air to the filter through the nozzle head, so that the dust and impurities attached to the filter at the original air inlet opening fall off;

[0019] S4: After the position of the micro fan is adjusted, the original air outlet opening of the collection tube becomes the air inlet opening, and the dust and impurities that fall from the original air inlet opening are blown away by the air flow discharged from the air outlet opening at this time, so that the fallen dust and impurities will no longer be sucked by the collection tube, thereby improving the subsequent air collection speed of the collection tube;

[0020] S5: When the harmful gas detected by the detection tube is excessive in the air, the display screen on the installation shell will display the monitoring information and broadcast an early warning through the speaker.

[0021] Compared with the prior art, the present invention provides an online monitoring alarm device for harmful gases in engineering environment air and a monitoring method thereof, which has the following beneficial effects:

[0022] 1. The online monitoring alarm device for harmful gases in the ambient air of the project and its monitoring method, by coordinating the turning component with the cleaning component, can effectively deal with the impurities on the filter at the opening of the collection pipe, and the positions of the air inlet opening and the air outlet opening of the collection pipe are switched. The dust and impurities that originally fell at the air inlet opening are blown away by the discharged air flow, avoiding the filter from being blocked and affecting the gas collection effect, thereby ensuring the monitoring efficiency and monitoring effect of harmful gases in the air.

[0023] 2. The online monitoring alarm device for harmful gases in the ambient air of the project and its monitoring method drive the nozzle head to swing left and right through the rotating tube, and during this period, the air guide tube drives the nozzle head to swing up and down, expanding the working range of the nozzle head, so that the airflow discharged from the nozzle head can blow away the impurities on the filter from multiple directions, thereby improving the cleaning effect of the impurities on the filter.

[0024] 3. The online monitoring alarm device for harmful gases in the ambient air of the project and the monitoring method thereof, when the rotating tube rotates, uses the side plate and the guide rod to drive the abutment block to abut and collide with the filter, so that the impurities on the filter that are difficult to blow off are shaken off, and during this period, the second sleeve drives the abutment block to move up and down along the second reciprocating screw rod, so that the abutment block abuts and collides with different positions of the filter, which ensures the impurity removal effect on the filter, and can avoid the abutment block always hitting the same position of the filter to cause damage to the filter, thereby increasing the service life of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the installation shell of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the present invention after the installation shell is removed;

[0028] Figure 4 is a schematic diagram of the cross-sectional structure of the annular shell of the present invention;

[0029] Figure 5 For the present invention Figure 4 A partial enlarged structural diagram of the middle part;

[0030] Figure 6 It is a schematic structural diagram of the arc-shaped partition of the present invention when rotating in the annular shell;

[0031] Figure 7 is a schematic diagram of the cross-sectional structure of the pneumatic tube of the present invention;

[0032] Figure 8 It is a schematic diagram of the external structure of the rotating tube of the present invention.

[0033] In the figure: 1, annular shell; 2, collection tube; 201, filter; 202, groove; 3, detection tube; 301, air monitoring assembly; 4, air flow sensor; 5, micro fan; 6, mounting shell; 601, circuit board; 602, display screen; 603, speaker; 7, support plate; 701, rotating rod; 702, main bevel gear; 703, bevel gear ring; 704, rotating plate; 7041, arc partition; 705, support; 706, drive motor; 8, pneumatic tube; 801, piston; 802 , air inlet pipe; 803, air outlet pipe; 804, air guide pipe; 9, nozzle head; 901, nozzle body; 902, connecting hose; 10, first reciprocating screw; 1001, first sleeve; 1002, push rod; 11, rotating tube; 111, driven gear; 112, rack plate; 113, connecting rod; 12, connecting seat; 13, reel; 131, pull rope; 14, second reciprocating screw; 141, movable gear; 142, second sleeve; 143, abutment block; 15, side plate; 151, guide rod. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Example: Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 , an online monitoring and alarm device for harmful gases in engineering environment air, comprising an annular shell 1, a collection tube 2 is arranged on the annular shell 1, filter screens 201 are arranged at both end openings of the collection tube 2, a detection tube 3 is arranged in the collection tube 2, an air monitoring assembly 301 and an air flow sensor 4 are arranged in the detection tube 3, a micro fan 5 is arranged in the collection tube 2, a turning component for adjusting the position of the micro fan 5 is arranged on the annular shell 1, cleaning components for cleaning impurities on the filter screen 201 are arranged at both ends of the collection tube 2, the turning component is connected to the cleaning component, a mounting shell 6 is arranged on the outside of the annular shell 1, a circuit board 601 electrically connected to the air flow sensor 4 is fixedly arranged inside the mounting shell 6, and a display screen 602 and a speaker 603 are arranged on the outside of the mounting shell 6.

[0038] Specifically, the micro fan 5 is controlled to operate, and the micro fan 5 draws air through the opening at the end of the collection tube 2. The drawn air enters the detection tube 3 after filtering impurities through the filter 201. The air monitoring assembly 301 in the detection tube 3 detects harmful gases in the air, and the detected air is discharged from the opening at the other end of the collection tube 2. As the micro fan 5 continues to work, the air flow sensor 4 detects that the air flow entering the collection tube 2 is reduced to a preset value, and impurities are accumulated on the filter 201 at the air inlet opening of the collection tube 2. By cooperating with the turning component and the cleaning component, the filter 201 at the opening of the collection tube 2 is cleaned. Impurities are effectively processed, and the positions of the air inlet opening and the air outlet opening of the collection tube 2 are switched. After the position of the micro fan 5 is adjusted, the original air outlet opening of the collection tube 2 becomes the air inlet opening, and the dust and impurities that fall from the original air inlet opening are blown away by the air flow discharged from the air outlet opening at this time, so that the fallen dust and impurities will no longer be sucked by the collection tube 2, thereby improving the subsequent air collection speed of the collection tube 2 and ensuring the monitoring efficiency and monitoring effect of harmful gases in the air. When the harmful gases in the air detected by the detection tube 3 are excessive, the display screen 602 on the mounting shell 6 displays the monitoring information and broadcasts an early warning through the speaker 603.

[0039] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4As a preferred technical solution of the present invention, the turning assembly includes support plates 7 fixedly arranged on both sides of the inner wall of the mounting shell 6, and the two support plates 7 are rotatably connected with a rotating rod 701, and a driving motor 706 for driving the rotating rod 701 to rotate is fixedly arranged on one of the support plates 7, and a main bevel gear 702 is arranged on the rotating rod 701, and a bevel gear ring 703 is meshedly connected to the outer side of the main bevel gear 702, and a rotating plate 704 fixedly connected to the bevel gear ring 703 is rotatably connected to the annular shell 1, and a support 705 connected to the micro fan 5 is fixedly arranged on the rotating plate 704; specifically, as the micro fan 5 continues to work, the air flow The volume sensor 4 detects that the air flow rate entering the collection tube 2 is reduced to a preset value, and impurities are accumulated in the filter 201 at the air inlet opening of the collection tube 2, and the driving motor 706 is controlled to run. The output shaft of the driving motor 706 drives the rotating rod 701 to rotate, and the main bevel gear 702 on the rotating rod 701 is meshed with the bevel gear ring 703 for transmission. The bevel gear ring 703 drives the micro fan 5 to move through the rotating plate 704, and the micro fan 5 moves along the annular shell 1, so that the micro fan 5 moves from the original air inlet port position of the collection tube 2 to the original air outlet port position, thereby realizing the conversion of the air inlet opening and the air outlet opening of the collection tube 2.

[0040] Reference Figure 4 and Figure 6 As a preferred technical solution of the present invention, a groove 202 connected to the annular shell 1 is provided on the collection tube 2, and an arc-shaped partition 7041 for blocking the groove 202 is fixed on the rotating plate 704; specifically, the arc-shaped partition 7041 is provided on the inner wall of the rotating plate 704 to separate the inner cavity of the annular shell 1 from the inner cavity of the collection tube 2, so as to prevent the air collected by the collection tube 2 from entering the inner cavity of the annular shell 1 through the groove 202, and entering the collection tube 2 through the groove 202 connected to the other end of the annular shell 1 to be discharged, so that the air is discharged without being detected. The setting of the arc-shaped partition 7041 effectively ensures the accuracy of the detection results of harmful gases in the air by the collection tube 2.

[0041] Reference Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As a preferred technical solution of the present invention, the cleaning component includes a pneumatic tube 8 fixed in the mounting shell 6, the pneumatic tube 8 and the central axis of the rotating rod 701 are in the same straight line, and the pneumatic tube 8 is sleeved on the outside of the rotating rod 701, and a piston 801 is slidably connected between the inner wall of the pneumatic tube 8 and the outer wall of the rotating rod 701, and an air inlet valve and an air outlet valve are provided on the pneumatic tube 8. The pneumatic tube 8 is connected to an air inlet pipe 802 connected to the inner cavity of the collection tube 2 through the air inlet valve, and the pneumatic tube 8 is connected to an air outlet pipe 803 through the air outlet valve. The end of the air outlet pipe 803 away from the pneumatic tube 8 passes through the collection tube 2 and is connected to an air guide pipe 804, and a plurality of nozzle heads 9 are equidistantly arranged on the air guide pipe 804.

[0042] Furthermore, the cleaning assembly also includes a first reciprocating screw 10 fixedly connected to the rotating rod 701, a first sleeve 1001 is threadedly connected to the first reciprocating screw 10, a push rod 1002 is fixed to the first sleeve 1001, and one end of the push rod 1002 away from the first sleeve 1001 passes through the pneumatic tube 8 and is connected to the piston 801.

[0043] Specifically, the output shaft of the driving motor 706 drives the rotating rod 701 to rotate, and when the rotating rod 701 rotates, it drives the first reciprocating screw 10 to rotate, and the first sleeve 1001 reciprocates along the axial direction of the first reciprocating screw 10, and the first sleeve 1001 drives the piston 801 to reciprocate in the pneumatic tube 8 through the push rod 1002, and the pneumatic tube 8 sucks the air in the collection tube 2 through the air inlet pipe 802 and discharges the air to the air guide pipe 804 through the air outlet pipe 803, and the air guide pipe 804 discharges the air to the filter 201 through the nozzle head 9, so that the dust and impurities attached to the filter 201 at the original air inlet opening fall off, and after the position of the micro fan 5 is adjusted, the original air outlet opening of the collection tube 2 becomes the air inlet opening, and the dust and impurities that fall from the original air inlet opening are blown away by the airflow discharged from the air outlet opening at this time, so that the fallen dust and impurities will no longer be sucked by the collection tube 2, thereby improving the subsequent air collection speed of the collection tube 2.

[0044] Reference Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As a preferred technical solution of the present invention, a rotating tube 11 is rotatably connected inside the collection tube 2, and the nozzle head 9 is rotatably connected to the rotating tube 11 through a pin shaft. A torsion spring for driving the nozzle head 9 to reset and rotate is arranged on the pin shaft. The nozzle head 9 includes a nozzle body 901 rotatably connected to the rotating tube 11 and a connecting hose 902 connected between the nozzle body 901 and the air guide tube 804. A driven gear 111 is arranged on the top of the rotating tube 11, and a rack plate 112 is meshedly connected to the outer side of the driven gear 111, and a connecting rod 113 is arranged between the first sleeve 1001 and the rack plate 112.

[0045] Furthermore, a connecting seat 12 is fixedly provided on the outer side of the rotating tube 11, and the air guide tube 804 is slidably connected to the connecting seat 12. A reel 13 is provided on the rotating tube 11, and a pull rope 131 is wound around the reel 13. The end of the pull rope 131 away from the reel 13 passes through the collection tube 2 and is connected to the top of the air guide tube 804.

[0046] Specifically, when the rotating rod 701 rotates, it drives the first reciprocating screw 10 to rotate, and the first sleeve 1001 reciprocates along the axial direction of the first reciprocating screw 10. The first sleeve 1001 drives the rack plate 112 to move through the connecting rod 113, so that the rack plate 112 and the driven gear 111 at the top of the rotating tube 11 reciprocately mesh and transmit, and the driven gear 111 drives the rotating tube 11 to rotate, so that the rotating tube 11 drives the nozzle head 9 to reciprocate left and right, and when the rotating tube 11 reciprocates, the reel 13 reciprocates to reel and release the pull rope 131, so that the air guide tube 804 drives the nozzle body 901 to swing back and forth up and down through the connecting hose 902, thereby expanding the working range of the nozzle head 9, so that the airflow discharged from the nozzle head 9 can blow away impurities on the filter 201 from multiple directions, thereby improving the cleaning effect of impurities on the filter 201.

[0047] Reference Figure 4 , Figure 5 and Figure 8 As a preferred technical solution of the present invention, a second reciprocating screw rod 14 is rotatably connected in the collection tube 2, and a movable gear 141 meshing with the driven gear 111 is arranged at the top of the second reciprocating screw rod 14, and the movable gear 141 adopts a flywheel structure, and a second sleeve 142 is threadedly connected to the second reciprocating screw rod 14, and a contact block 143 that is movably abutted against the filter screen 201 is rotatably connected to the second sleeve 142, and a side plate 15 is fixedly provided on the rotating tube 11, and a guide rod 151 that is slidably connected to the contact block 143 is fixedly provided on the side plate 15; specifically, when the driven gear 111 reciprocates, it meshes with the movable gear 141 for transmission, and the movable gear 141 is arranged as a flywheel structure (the flywheel structure is a prior art), so that The movable gear 141 drives the second reciprocating screw 14 to rotate in one direction, so that the second sleeve 142 moves back and forth up and down along the axis of the second reciprocating screw 14. When the rotating tube 11 rotates, the side plate 15 and the guide rod 151 are used to drive the abutment block 143 to abut and collide with the filter 201, so that impurities on the filter 201 that are difficult to blow off are shaken off. During this period, the second sleeve 142 drives the abutment block 143 to move up and down along the second reciprocating screw 14, so that the abutment block 143 abuts and collides with different positions of the filter 201, which ensures the impurity removal effect on the filter 201 while avoiding the damage of the filter 201 caused by the abutment block 143 always hitting the same position of the filter 201, thereby improving the service life of the filter 201.

[0048] Reference Figure 1 and Figure 4As a preferred technical solution of the present invention, the air monitoring assembly 301 includes a smoke sensor, an alcohol sensor, a carbon dioxide sensor and a carbon monoxide sensor, and the air monitoring assembly 301 is electrically connected to the circuit board 601; specifically, data is collected through the smoke sensor, the alcohol sensor, the carbon dioxide sensor and the carbon monoxide sensor. If the data exceeds the standard, an alarm can be issued through the speaker 603 and the display screen 602 to achieve timely and effective monitoring.

[0049] The present invention also discloses a monitoring method of an online monitoring and alarm device for harmful gases in engineering environment air, which further comprises the following steps:

[0050] S1: Control the micro fan 5 to operate, the micro fan 5 sucks air through the opening at the end of the collection tube 2, the sucked air enters the detection tube 3 after filtering impurities through the filter 201, the air monitoring assembly 301 in the detection tube 3 detects harmful gases in the air, and the detected air is discharged from the opening at the other end of the collection tube 2;

[0051] S2: As the micro fan 5 continues to work, the air flow sensor 4 detects that the air flow entering the collection tube 2 is reduced to a preset value, and impurities are accumulated in the filter 201 at the air inlet opening of the collection tube 2, and the drive motor 706 is controlled to operate. The output shaft of the drive motor 706 drives the rotating rod 701 to rotate, and the main bevel gear 702 on the rotating rod 701 is meshed with the bevel gear ring 703 for transmission. The bevel gear ring 703 drives the micro fan 5 to move through the rotating plate 704, and the micro fan 5 moves along the annular shell 1, so that the micro fan 5 moves from the original air inlet port position of the collection tube 2 to the original air outlet port position;

[0052] S3: When the rotating rod 701 rotates, it drives the first reciprocating screw 10 to rotate, and the first sleeve 1001 reciprocates along the axial direction of the first reciprocating screw 10. The first sleeve 1001 drives the piston 801 to reciprocate in the pneumatic tube 8 through the push rod 1002. The pneumatic tube 8 draws air in the collection tube 2 through the air inlet pipe 802 and discharges the air to the air guide pipe 804 through the air outlet pipe 803. The air guide pipe 804 discharges the air to the filter screen 201 through the nozzle head 9, so that the dust and impurities attached to the filter screen 201 at the original air inlet opening fall off;

[0053] S4: After the position of the micro fan 5 is adjusted, the original air outlet opening of the collection tube 2 becomes the air inlet opening, and the dust and impurities that fall from the original air inlet opening are blown away by the air flow discharged from the air outlet opening at this time, so that the fallen dust and impurities will no longer be sucked by the collection tube 2, thereby improving the subsequent air collection speed of the collection tube 2;

[0054] S5: When the harmful gas detected by the detection tube 3 is excessive in the air, the display screen 602 on the mounting shell 6 displays the monitoring information and broadcasts an early warning through the speaker 603.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An online monitoring and alarm device for harmful gases in engineering environment air, comprising an annular shell (1), characterized in that: The annular shell (1) is provided with a collection tube (2), and both ends of the collection tube (2) are provided with filter screens (201). A detection tube (3) is provided inside the collection tube (2), and an air monitoring assembly (301) and an air flow sensor (4) are provided inside the detection tube (3). A micro fan (5) is provided inside the collection tube (2). A rotation component for adjusting the position of the micro fan (5) is provided on the annular shell (1), and both ends of the collection tube (2) are provided with cleaning components for cleaning impurities on the filter screen (201), and the rotation component is connected to the cleaning component. A mounting shell (6) is provided on the outside of the annular shell (1), and a circuit board (601) electrically connected to the air flow sensor (4) is fixedly provided inside the mounting shell (6), and a display screen (602) and a speaker (603) are provided on the outside of the mounting shell (6).

2. The on-line monitoring and alarm device for harmful gases in engineering environment air according to claim 1 is characterized in that: The rotation assembly comprises support plates (7) fixedly arranged on both sides of the inner wall of the mounting shell (6), and the two support plates (7) are both rotatably connected to a rotating rod (701), and one of the support plates (7) is fixedly provided with a driving motor (706) for driving the rotating rod (701) to rotate, and the rotating rod (701) is provided with a main bevel gear (702), and the outer side of the main bevel gear (702) is meshingly connected to a bevel gear ring (703), and the annular shell (1) is rotatably connected to a rotating plate (704) fixedly connected to the bevel gear ring (703), and the rotating plate (704) is fixedly provided with a support (705) connected to the micro fan (5).

3. The online monitoring and alarm device for harmful gases in engineering environment air according to claim 2 is characterized in that: The collecting tube (2) is provided with a groove (202) which is in communication with the annular shell (1), and the rotating plate (704) is fixedly provided with an arc-shaped partition plate (7041) for blocking the groove (202).

4. The online monitoring and alarm device for harmful gases in engineering environment air according to claim 3 is characterized in that: The cleaning assembly comprises a pneumatic tube (8) fixedly arranged in the mounting shell (6); the pneumatic tube (8) and the central axis of the rotating rod (701) are in the same straight line, and the pneumatic tube (8) is sleeved on the outer side of the rotating rod (701); a piston (801) is slidably connected between the inner wall of the pneumatic tube (8) and the outer wall of the rotating rod (701); an air inlet valve and an air outlet valve are arranged on the pneumatic tube (8); the pneumatic tube (8) is connected to an air inlet pipe (802) which is connected to the inner cavity of the collection tube (2) through the air inlet valve; the pneumatic tube (8) is connected to an air outlet pipe (803) through the air outlet valve; one end of the air outlet pipe (803) away from the pneumatic tube (8) passes through the collection tube (2) and is connected to an air guide pipe (804); a plurality of nozzle heads (9) are equidistantly arranged on the air guide pipe (804).

5. The on-line monitoring and alarm device for harmful gases in engineering environment air according to claim 4 is characterized in that: The cleaning assembly also includes a first reciprocating screw (10) fixedly connected to the rotating rod (701), a first sleeve (1001) being threadedly connected to the first reciprocating screw (10), a push rod (1002) being fixedly provided on the first sleeve (1001), and an end of the push rod (1002) away from the first sleeve (1001) passing through the pneumatic tube (8) and connected to the piston (801).

6. The on-line monitoring and alarm device for harmful gases in engineering environment air according to claim 5 is characterized in that: A rotating tube (11) is rotatably connected inside the collection tube (2); the nozzle head (9) is rotatably connected to the rotating tube (11) via a pin shaft; a torsion spring for driving the nozzle head to reset and rotate is arranged on the pin shaft; the nozzle head (9) comprises a nozzle body (901) rotatably connected to the rotating tube (11) and a connecting hose (902) connected between the nozzle body (901) and the air guide tube (804); a driven gear (111) is arranged at the top of the rotating tube (11); a rack plate (112) is meshedly connected to the outer side of the driven gear (111); and a connecting rod (113) is arranged between the first sleeve (1001) and the rack plate (112).

7. The on-line monitoring and alarm device for harmful gases in engineering environment air according to claim 6 is characterized in that: A connecting seat (12) is fixedly provided on the outer side of the rotating tube (11), and the air guide tube (804) is slidably connected to the connecting seat (12). A reel (13) is provided on the rotating tube (11), and a pull rope (131) is wound around the reel (13). The end of the pull rope (131) away from the reel (13) passes through the collection tube (2) and is connected to the top of the air guide tube (804).

8. The on-line monitoring and alarm device for harmful gases in engineering environment air according to claim 7 is characterized in that: A second reciprocating screw (14) is rotatably connected inside the collection tube (2); a movable gear (141) meshing with a driven gear (111) is arranged at the top of the second reciprocating screw (14); the movable gear (141) adopts a flywheel structure; a second sleeve (142) is threadedly connected to the second reciprocating screw (14); a contact block (143) movably abutting against the filter screen (201) is rotatably connected to the second sleeve (142); a side plate (15) is fixedly provided on the rotating tube (11); a guide rod (151) slidably connected to the contact block (143) is fixedly provided on the side plate (15).

9. The on-line monitoring and alarm device for harmful gases in engineering environment air according to claim 1 is characterized in that: The air monitoring assembly (301) comprises a smoke sensor, an alcohol sensor, a carbon dioxide sensor and a carbon monoxide sensor, and the air monitoring assembly (301) is electrically connected to a circuit board (601).

10. A monitoring method for the online monitoring and alarm device for harmful gases in engineering environment air according to claim 8, characterized in that: The following steps are also included: S1: Controlling the operation of the micro fan (5), the micro fan (5) sucks air through the opening at the end of the collection tube (2), the sucked air passes through the filter (201) to filter out impurities and then enters the detection tube (3), the air monitoring assembly (301) in the detection tube (3) detects harmful gases in the air, and the detected air is discharged from the opening at the other end of the collection tube (2); S2: As the micro fan (5) continues to work, the air flow sensor (4) detects that the air flow entering the collection tube (2) decreases to a preset value, and impurities accumulate on the filter (201) at the air inlet opening of the collection tube (2). The drive motor (706) is controlled to operate, and the output shaft of the drive motor (706) drives the rotating rod (701) to rotate. The main bevel gear (702) on the rotating rod (701) meshes with the bevel gear ring (703) for transmission. The bevel gear ring (703) drives the micro fan (5) to move through the rotating plate (704). The micro fan (5) moves along the annular shell (1), so that the micro fan (5) moves from the original air inlet port position of the collection tube (2) to the original air outlet port position; S3: When the rotating rod (701) rotates, it drives the first reciprocating screw (10) to rotate, and the first sleeve (1001) reciprocates along the axial direction of the first reciprocating screw (10). The first sleeve (1001) drives the piston (801) to reciprocate in the pneumatic tube (8) through the push rod (1002). The pneumatic tube (8) sucks air in the collection tube (2) through the air inlet pipe (802) and discharges the air to the air guide pipe (804) through the air outlet pipe (803). The air guide pipe (804) discharges the air to the filter screen (201) through the nozzle head (9), so that the dust and impurities attached to the filter screen (201) at the original air inlet opening fall off; S4: After the position of the micro fan (5) is adjusted, the original air outlet opening of the collection tube (2) becomes an air inlet opening, and the dust and impurities that fall from the original air inlet opening are blown away by the air flow discharged from the air outlet opening at this time, so that the fallen dust and impurities will no longer be sucked by the collection tube (2), thereby increasing the subsequent air collection speed of the collection tube (2); S5: When the harmful gas detected by the detection tube (3) is excessive in the air, the display screen (602) on the mounting shell (6) displays the monitoring information and broadcasts an early warning through the speaker (603).

Images