Harmful gas monitoring equipment for tunnel excavation

Abstract

A tunnel excavation harmful gas monitoring device disclosed by the present invention comprises a pump suction type gas detector, a cleaning mechanism and a driving mechanism, a gas inlet of the pump suction type gas detector is hermetically communicated with a gas suction pipe which is integrally arranged on a main shell frame, and the cleaning mechanism is arranged in a middle circular pipe cavity of the main shell frame. The main shell frame can automatically clean the filter part in a flapping mode and is used for sealing and blocking the air suction pipe before the filter part is cleaned, the filter part is arranged at the communication position of the middle round pipe cavity and the lower round pipe cavity of the main shell frame in a sealing mode, and an end cover with a hole is fixedly connected to an opening in the lower end of the middle-lower round pipe cavity of the main shell frame in a threaded mode. According to the tunnel excavation harmful gas monitoring equipment, automatic flapping type cleaning operation is achieved, multi-point uniform flapping is guaranteed, the cleaning efficiency is guaranteed, in addition, in the ash cleaning operation, sealing treatment is conducted on a gas flow channel in the monitoring equipment, and the monitoring effect is prevented from being disturbed.

Description

Technical Field

[0001] The present invention relates to the technical field related to air pollution monitoring, and in particular to a tunnel excavation harmful gas monitoring device. Background Art

[0002] During tunnel excavation, hazardous gases such as carbon monoxide produced by incomplete fuel combustion, methane commonly found in coal-bearing strata or areas where organic matter decomposes, and hydrogen sulfide produced by the hydrolysis of sulfide minerals are often encountered. These harmful gases in the tunnel can cause poisoning and suffocation to construction workers, or even cause tunnel explosions.

[0003] In order to ensure the safety of construction workers and to protect facilities and construction safety, it is crucial to monitor harmful gases during tunnel excavation. Gas detection instruments are usually used to monitor the concentration of harmful gases in tunnel excavation.

[0004] After searching the invention patent with the authorization announcement number CN115902127B, a portable Internet of Things gas monitoring device is disclosed, which includes a shell, a circular through hole is symmetrically provided on one side of the shell, a sealing shell is fixedly connected to the inner wall of the shell, the sealing shell is connected to a first connecting pipe, a circular shell is fixedly connected to the inner bottom of the shell, the first connecting pipe is connected to the circular shell, an air filtering mechanism is provided in the circular shell, the circular shell is connected to a second connecting pipe, a gas monitor is fixedly connected to the inner wall of the shell, the gas monitor is connected to the second connecting pipe, a third connecting pipe is provided on the inner side of the shell, the lower end of the third connecting pipe is connected to the circular shell, the upper part of the third connecting pipe is fixedly connected to a guide ring, and the middle part of the third connecting pipe is slidably connected to the fourth connecting pipe.

[0005] Based on the above patents, existing solutions, and actual use, there are still some problems with the current harmful gas monitoring equipment in tunnel excavation construction, such as:

[0006] During tunnel excavation, the dust concentration in the air is high due to the influence of construction conditions and construction environment. When monitoring harmful gases in the air, it is necessary to filter the gas samples entering the monitoring instrument. The existing harmful gas monitoring instruments use a filtering method for gas samples, which is to install a filter component at the air inlet of the monitoring instrument. However, the filter components in the existing monitoring instruments are mostly simple filter meshes, which cannot automatically clean the dust they block and absorb. When dust accumulates on the filter component, it prevents the gas sample from entering the monitoring instrument, affecting the monitoring effect.

[0007] Compared with the existing harmful gas monitoring instruments, the above patent uses an arc-shaped electrostatic plate to adsorb and filter dust particles in the gas sample. In the above patent, the dust adsorbed on the arc-shaped electrostatic plate is scraped and cleaned by rotating the second sealing plate and the third sealing plate after filtering. However, this method does not seal the second connecting pipe and the vacuum pump connected to the gas monitor during cleaning. The dust during cleaning will directly float away to form dust mist, diffuse and fill the second connecting pipe and the vacuum pump. When the vacuum pump works next time, the dust will be brought into the gas monitor and attached to the sensor surface to reduce sensitivity, thereby interfering with the detection effect.

[0008] Therefore, we propose a tunnel excavation harmful gas monitoring device to solve the above problems. Summary of the Invention

[0009] The purpose of the present invention is to provide a tunnel excavation harmful gas monitoring device to solve the problem raised in the above background technology that it cannot ensure that the filter components in the monitoring device are automatically cleaned when the gas flow channel of the monitoring device is closed, thereby affecting the subsequent monitoring effect.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a tunnel excavation harmful gas monitoring device, comprising:

[0011] A pump-suction gas detector, wherein the air inlet of the pump-suction gas detector is sealed and connected to an air intake pipe provided in an integrated structure on the main housing, and the air intake pipe is connected to the central circular tube cavity of the main housing;

[0012] Also includes:

[0013] A cleaning mechanism is provided in the central circular tube cavity of the main housing, and can automatically clean the filter element by beating. The cleaning mechanism is also used to seal and plug the intake pipe before the filter element is cleaned. The filter element is sealed at the connection between the central circular tube cavity and the lower circular tube cavity of the main housing, and a perforated end cap is threadedly fixed to the lower end opening of the central and lower circular tube cavity of the main housing;

[0014] The driving mechanism is placed in the auxiliary housing fixed to the upper end of the main housing and is used to drive the cleaning mechanism to move.

[0015] Preferably, the cleaning mechanism includes a plug member for sealing the intake pipe and a clapper member for clapping and cleaning the filter member, the plug member forms a sliding structure in the central circular tube cavity of the main housing, and the lower side of the plug member is provided with a flippable clapper member in a ring array with its center as the center of the circle, the square tube portion of the plug member is internally threadedly connected to a screw column for driving the plug member, and the screw column forms a rotating structure on the auxiliary housing, and a rotatable transmission rod is slidably connected in the tube cavity of the screw column;

[0016] The transmission rod and the plug member form a synchronous sliding structure, and the transmission rod forms a rotating structure on the plug member, and the lower end of the transmission rod is fixedly connected to a cam member with the same rotation center as the transmission rod.

[0017] Preferably, the inner end of the clapper member is provided with a half gear portion with the same flip center therewith, the half gear portion is meshed and connected with the rack portion provided on the pushing plate, and the semicircular end of the pushing plate is connected to the cam member in a pressing manner, the pushing plate constitutes a telescopic sliding structure in the plug member, and a first spring is installed at the sliding connection between the two.

[0018] Preferably, the driving mechanism includes a square seat slidably connected in the sub-frame, a driven gear rotatably connected to the left end of the square seat and a driving gear rotatably connected to the right end of the square seat, the driven gear and the driving gear are meshed and connected together, the lower end of the shaft tube of the driven gear is provided with a first spline groove of an integrated structure, and the first spline groove is connected to the first spline wheel fixed to the upper end of the screw column in a snap-fit ​​manner, the upper end of the shaft tube of the driven gear is provided with a second spline groove of an integrated structure, and the second spline groove is connected to the second spline wheel fixed to the upper end of the transmission rod in a snap-fit ​​manner.

[0019] Preferably, a telescopic electromagnet for driving the square seat to slide is installed on the connecting column portion in the square seat, and a second spring is installed at the sliding connection between the square seat and the auxiliary housing.

[0020] Preferably, a driving motor for driving the gear column to rotate is fixedly installed in the sub-frame, and the gear column is fixedly connected to the output end of the driving motor. The gear column forms a sliding structure on the driving gear, and the gear column is connected to the gear groove opened in the shaft tube of the driving gear by a snap-fitting manner.

[0021] Preferably, the filter element is threadedly connected to the cavity wall of the main housing and can be disassembled and replaced on the main housing. The lower circular tube cavity of the main housing is provided with an integrated dust suction pipe for centrally collecting the dust cleaned from the filter element.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the tunnel excavation harmful gas monitoring equipment realizes automatic beating cleaning operation and ensures uniform beating at multiple points, thereby ensuring cleaning efficiency. In addition, during the dust cleaning operation, the gas flow channel in the monitoring equipment is sealed to avoid interference with the monitoring effect;

[0023] 1. After the plug is driven to move downward with the clapper, the plug and the sealing ring seal the suction pipe, and the clapper is in contact with the filter. The clapper cleans the dust adsorbed on the filter by beating. During the dust cleaning operation of the filter, the gas flow channel in the monitoring equipment is sealed to prevent dust from drifting into the monitoring equipment through the gas flow channel and interfering with the monitoring effect.

[0024] Furthermore, after the driven gear follows the square seat to move downward, the engagement between the first spline groove and the first spline wheel drives the screw column to rotate through the driven gear, driving the plug column to move downward to seal the suction pipe. After the driven gear follows the square seat to move upward, the engagement between the second spline groove and the second spline wheel drives the transmission rod to rotate through the driven gear. The transmission rod drives the cam part to rotate and push each pushing plate in turn to move, and the meshing action between the rack part and the half gear part drives the clapper part to flip and unfold to clap the filter element. Through the setting of the linkage structure, while sealing the suction pipe, an automatic clapping cleaning operation is realized, and uniform clapping of multiple points is guaranteed, thereby ensuring cleaning efficiency.

[0025] 2. A dust suction pipe is provided on the lower circular tube cavity of the main frame, which is connected to the dust suction pipe. The dust cleaned from the filter element floats in the lower circular tube cavity of the main frame. The dust is discharged and collected by the dust suction pipe through the dust suction equipment. In addition, the filter element is installed in the main frame in a threaded connection manner, which can be easily disassembled and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the front cross-sectional three-dimensional structure of the connection between the main housing frame and the cleaning mechanism of the present invention;

[0028] Figure 3 This is a schematic diagram of the front cross-sectional three-dimensional structure of the connection between the sub-frame and the drive mechanism of the present invention;

[0029] Figure 4 This is a schematic diagram of the front cross-sectional three-dimensional structure of the cleaning mechanism of the present invention;

[0030] Figure 5 This is a schematic diagram of the front cross-sectional three-dimensional structure of the connection between the clapper member and the pushing plate of the present invention;

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of the plug member and the clapper member of the present invention when viewed from above;

[0032] Figure 7 This is a schematic diagram of the side cross-sectional three-dimensional structure of the connection between the screw column and the transmission rod of the present invention;

[0033] Figure 8 This is a schematic diagram of a front cross-sectional three-dimensional structure of the connection between the transmission rod and the driven gear of the present invention;

[0034] Figure 9 This is a schematic diagram of a front cross-sectional three-dimensional structure of the driving mechanism of the present invention;

[0035] Figure 10 This is a schematic diagram of the three-dimensional structure of the driving gear and the gear column of the present invention when viewed from above;

[0036] Figure 11 This is a structural diagram of embodiment 2 of the present invention.

[0037] In the figure: 1. Pump-suction gas detector; 2. Main housing; 201. Suction pipe; 3. Cleaning mechanism; 4. Filter element; 5. End cover with hole; 6. Driving mechanism; 7. Sub-housing; 8. Plug column; 9. Clamping plate; 901. Half gear part; 10. Screw column; 11. Transmission rod; 12. Cam member; 13. Pushing plate; 1301. Rack part; 14. First spring; 15. Square seat; 16. Driven gear; 1601. First spline groove; 1602. Second spline groove; 17. Driving gear; 1701. Gear groove; 18. First spline wheel; 19. Second spline wheel; 20. Telescopic electromagnet; 21. Second spring; 22. Driving motor; 23. Gear column; 24. Dust suction pipe. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example 1:

[0040] The present invention provides a technical solution: a tunnel excavation harmful gas monitoring device, which addresses the problem that the filter components in the existing harmful gas monitoring instruments cannot be automatically cleaned, and addresses the problem that during the cleaning process of the filter components, the gas flow channel in the monitoring instrument cannot be sealed and blocked, and the diffusion of dust and fog cannot be blocked. The cleaning mechanism 3 is driven by the driving mechanism 6 to move, and the suction pipe 201 connected to the pump-suction gas detector 1 is first sealed and blocked by the cleaning mechanism 3, and then the filter element 4 is automatically cleaned by the cleaning mechanism 3 in a patting manner, so that the dust blocked and adsorbed on the filter element 4 is shaken off and cleaned.

[0041] This technical solution: please refer to Figures 1-10A tunnel excavation harmful gas monitoring device includes a pump-suction gas detector 1. The lower side of the pump-suction gas detector 1 is provided with an air inlet for the entry of a gas sample. The air inlet of the pump-suction gas detector 1 is sealed and connected to an air suction pipe 201 which is provided on a main shell frame 2 in an integrated structure. The main shell frame 2 is provided with an upper square tube cavity, a middle circular tube cavity and a lower circular tube cavity in sequence from top to bottom. The upper square tube cavity, the middle circular tube cavity and the lower circular tube cavity in the main shell frame 2 are arranged in a mutually connected state, and the air suction pipe 201 is arranged in a connected state with the middle circular tube cavity of the main shell frame 2.

[0042] It also includes a cleaning mechanism 3 and a driving mechanism 6. The cleaning mechanism 3 is arranged in the middle circular tube cavity of the main shell frame 2, which corresponds to directly above the filter element 4, and it and the filter element 4 are on the same vertical central axis. The cleaning mechanism 3 can perform a slapping-type automatic cleaning treatment on the filter element 4, and the cleaning mechanism 3 is also used for sealing and plugging the intake pipe 201 during the cleaning operation of the filter element 4. The filter element 4 is sealed and placed at the connection between the middle circular tube cavity and the lower circular tube cavity of the main shell frame 2, and the lower end opening of the middle and lower circular tube cavity of the main shell frame 2 is threadedly fixed with a perforated end cover 5. The driving mechanism 6 corresponds to directly above the cleaning mechanism 3, and is placed in the sub-shell frame 7 fixed to the upper end of the main shell frame 2. The driving mechanism 6 is used to drive the cleaning mechanism 3 to move.

[0043] Specifically, in this technical solution, the driven gear 16 in the operating drive mechanism 6 rotates to work according to Figure 3 、 Figure 9 and Figure 10 As shown, since the upper end of the gear column 23 is upwardly extended to be provided with a shaft body of an integrated structure, wherein a bearing is fixedly sleeved on the shaft body, after the gear column 23 is installed, the shaft body together with the bearing is inserted into the housing cavity wall of the sub-case frame 7, so that the gear column 23 is positioned in a movable state within the sub-case frame 7, and since the drive motor 22 is fixedly installed in the housing cavity of the sub-case frame 7 by bolts after installation, and the output end thereof is inserted into and fixedly connected to the upper end of the shaft body of the gear column 23 by bolts, the drive motor 22 is started to operate, driving the gear column 23 to rotate within the housing cavity of the sub-case frame 7;

[0044] Since an integrated shaft tube is vertically provided at the center of the driving gear 17, a gear groove 1701 is provided in the shaft tube of the driving gear 17 and is concentric therewith, and the gear groove 1701 is adapted to correspond to the gear column 23. Moreover, since the gear column 23 is movably inserted into the shaft tube of the driving gear 17 after being installed, the two are connected by a snap-fitting manner. When the gear column 23 is driven to rotate, the snapping action between the gear groove 1701 and the gear column 23 causes the driving gear 17 and the gear column 23 to form a synchronous rotation structure.

[0045] Since the upper and lower ends of the shaft tube in the driving gear 17 are fixedly connected with bearings, the driving gear 17 is movably mounted in the seat cavity at the right end of the square seat 15 after being placed, wherein the upper and lower ends of the shaft tube are respectively connected with the bearings to the upper and lower seat cavity walls at the right end of the square seat 15, and the upper end of the shaft tube is inserted through the upper seat cavity wall at the right end of the square seat 15 and extends outward, so that the driving gear 17 is positioned in the square seat 15 in an active state, and the driving gear 17 is driven to rotate in the seat cavity at the right end of the square seat 15;

[0046] Since the center position of the driven gear 16 is vertically provided with an integrated shaft tube, wherein the upper and lower ends of the shaft tube are fixedly connected with bearings, the driven gear 16 is movably mounted in the seat cavity at the left end of the square seat 15 after being placed, wherein the upper and lower ends of the shaft tube are respectively connected with bearings and inserted into the upper and lower seat cavity walls on the left end of the square seat 15, and the upper and lower ends of the shaft tube are respectively inserted through the upper and lower seat cavity walls on the left end of the square seat 15 to extend outward, so that the driven gear 16 is positioned in the square seat 15 in an active state, and since the driven gear 16 is meshed and connected with the driving gear 17, after the driving gear 17 is driven to rotate, the meshing action between the driving gear 17 and the driven gear 16 causes the driven gear 16 to rotate in the seat cavity at the left end of the square seat 15, thereby completing the rotation operation of the driven gear 16.

[0047] Specifically, in this technical solution, the driven gear 16 and the second spline wheel 19 are operated to rotate synchronously. Figure 3 、 Figure 4 、 Figure 8 and Figure 9 As shown, since the right end of the lower side wall of the square seat 15 is vertically downwardly provided with a connecting column portion of an integrated structure, after the square seat 15 is placed, the connecting column portion is movably clamped in the shell cavity of the secondary frame 7. Through the square structure of the square seat 15 itself, the square seat 15 is positioned in the secondary frame 7 in an active state, so that the square seat 15 is restricted in the secondary frame 7 and can only slide linearly up and down. Since the telescopic electromagnet 20 is fixedly installed in the shell cavity of the secondary frame 7 by bolts after placement, and the output end thereof is plugged in and fixedly connected to the connecting column portion in the square seat 15 by bolts, the telescopic electromagnet 20 is started to extend and operate, pushing the square seat 15 to make it slide upward in the shell cavity of the secondary frame 7;

[0048] Since a spring bin is provided at the right end of the upper side wall of the square seat 15, and since a second spring 21 is installed at the sliding connection between the square seat 15 and the auxiliary housing 7, the second spring 21 is arranged in a movable sleeve state with the gear column 23 after being installed, and is movably inserted into the spring bin of the square seat 15, and one end thereof is pressed against the spring bin wall in the square seat 15, and the other end thereof is pressed against the housing cavity wall of the auxiliary housing 7. When the square seat 15 is driven to adjust and slide upward, the second spring 21 is squeezed and elastically deformed. The second spring 21 is used to assist the square seat 15 in sliding downward in the auxiliary housing 7.

[0049] Since the length of the gear groove 1701 is greater than the maximum sliding distance of the square seat 15, when the square seat 15 is slid and adjusted, the gear column 23 forms a sliding structure on the driving gear 17, which does not affect the sliding of the square seat 15. After the square seat 15 is slid and adjusted, the gear groove 1701 and the gear column 23 are always kept in meshing connection, without affecting the transmission between the gear column 23 and the driving gear 17.

[0050] Since the upper end of the shaft tube of the driven gear 16 is provided with a second spline groove 1602 of an integrated structure, the center of the second spline groove 1602 and the center of the shaft tube of the driven gear 16 are on the same vertical central axis, and since the second spline groove 1602 is adapted to correspond to the second spline wheel 19, the two are connected in a snap-fit ​​manner, and when the square seat 15 is driven to slide upward, the driven gear 16 is driven to move upward synchronously. After the square seat 15 is driven to slide upward, the driven gear 16 is brought into contact with the second spline wheel 19 that has descended, so that the second spline wheel 19 is snapped into the second spline groove 1602. Through the snapping action between the two, the driven gear 16 and the second spline wheel 19 form a synchronous rotation structure, that is, when the driven gear 16 is driven to rotate, it drives the second spline wheel 19 to rotate synchronously.

[0051] Specifically, in this technical solution, the driven gear 16 and the first spline wheel 18 are operated to rotate synchronously. Figure 3 、 Figure 4 、 Figure 8 and Figure 9 As shown, according to the above, the telescopic electromagnet 20 is started to retract and operate, and the elastic deformation of the second spring 21 is reset, so that the square seat 15 is reset and slid downward in the shell cavity of the sub-shell frame 7;

[0052] Since the lower end of the shaft tube of the driven gear 16 is provided with a first spline groove 1601 of an integrated structure, the center of the first spline groove 1601 and the center of the shaft tube of the driven gear 16 are on the same vertical central axis, and since the first spline groove 1601 is adapted to correspond to the first spline wheel 18, the two are connected in a snap-fit ​​manner, and when the square seat 15 is driven to slide downward to reset, it drives the driven gear 16 to move downward synchronously. After the square seat 15 is driven to slide downward to reset, the driven gear 16 is connected to the first spline wheel 18, and the first spline wheel 18 is snapped into the first spline groove 1601. Through the snap-fit ​​action between the two, the driven gear 16 and the first spline wheel 18 form a synchronous rotation structure, that is, when the driven gear 16 is driven to rotate, it drives the first spline wheel 18 to rotate synchronously.

[0053] Specifically, in this technical solution, the driving mechanism 6 drives the cleaning mechanism 3 to move, first operating the plug member 8 to seal the suction pipe 201, and then Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 8 As shown, when the driving mechanism 6 needs to drive the plunger 8 to move, it is necessary to ensure that the driven gear 16 is docked with the first spline wheel 18, and also ensure that the driven gear 16 is in a separated state from the second spline wheel 19. According to the above, after the square seat 15 is driven to slide downward, the first spline wheel 18 and the first spline groove 1601 engage with each other, so that the driven gear 16 and the first spline wheel 18 form a synchronous rotation structure.

[0054] Since the upper end of the screw column 10 is upwardly extended to be provided with a shaft body of an integrated structure, wherein a bearing is fixedly sleeved on the shaft body, after the screw column 10 is placed, its upper end shaft body together with the bearing is inserted into the lower side shell wall of the auxiliary housing frame 7, and its upper end shaft body movably penetrates the lower side shell wall of the auxiliary housing frame 7 and extends into the shell cavity, so that the screw column 10 is positioned on the auxiliary housing frame 7 in a movable state, and since the first spline wheel 18 is sleeved and fixedly connected to the upper end shaft body of the screw column 10 by bolts after placement, the driven gear 16 drives the first spline wheel 18 to rotate synchronously when it is driven to rotate, so that the first spline wheel 18 drives the screw column 10 to move synchronously and causes the screw column 10 to rotate on the auxiliary housing frame 7;

[0055] Since the left side wall of the auxiliary housing 7 is vertically provided with a connecting plate portion of an integrated structure, after the auxiliary housing 7 is placed, its lower side wall is fixedly connected to the upper end of the main housing 2 by bolts, and the connecting plate portion is fixedly connected to the outer shell of the pump-suction type gas detector 1 by bolts, so that the auxiliary housing 7, the main housing 2 and the pump-suction type gas detector 1 are fixedly placed together;

[0056] Since a square tube portion of an integrated structure is vertically provided on the upper side of the plug column member 8, wherein the center of the square tube portion and the center of the plug column member 8 are on the same vertical central axis, and since the upper end of the square tube cavity in the upper part of the main housing frame 2 is in an open state and is provided with an opening, after the main housing frame 2 and the auxiliary housing frame 7 are docked, the screw column 10 is inserted through the opening of the square tube cavity in the upper part of the main housing frame 2 after being installed, and is inserted into the tube cavity of the square tube portion of the plug column member 8, and a thread matching the screw column 10 is provided on the tube cavity wall of the square tube portion of the plug column member 8. After the screw column 10 is installed, it is threadedly connected with the threaded tube cavity wall of the square tube portion of the plug column member 8. After the screw column 10 is driven to rotate, the plug column member 8 is driven downward by the threaded action between the screw column 10 and the square tube portion of the plug column member 8;

[0057] Since the plug member 8 is arranged in a cylindrical structure, a sealing ring is fixedly connected to its outer side, the diameter size of the plug member 8 is adapted to the diameter size of the central circular tube cavity of the main frame 2, and the specification size of the square tube portion of the plug member 8 is adapted to the specification size of the upper square tube cavity of the main frame 2. Moreover, after the plug member 8 is placed, it is movably plugged into the central circular tube cavity of the main frame 2 together with the sealing ring, and the square tube portion is movably plugged into the upper square tube cavity of the main frame 2, so that the plug member 8 is positioned in the main frame 2 in a movable state. By the square structure of the square tube portion of the plug member 8 and the central and upper square tube cavity of the main frame 2, the plug member 8 is restricted in the main frame 2 and can only perform linear sliding movement up and down, and the plug member 8 is driven to slide downward in the central circular tube cavity of the main frame 2;

[0058] Since the intake pipe 201 is an integrated structure arranged on the left shell wall in the middle of the main shell frame 2, the intake pipe 201 is connected to the central circular tube cavity of the main shell frame 2. After the plug member 8 is driven to slide downward, it and the sealing ring are tightly attached to the pipe mouth of the intake pipe 201, thereby sealing and plugging the connection between the intake pipe 201 and the central circular tube cavity of the main shell frame 2. Before the filter element 4 is patted and cleaned, the sealing and plugging of the intake pipe 201 is completed.

[0059] Specifically, in this technical solution, the cleaning mechanism 3 is driven by the driving mechanism 6 to move, and then the clapping member 9 is operated to automatically clean the filter 4 by clapping. Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, when the driving mechanism 6 needs to drive the clapper member 9 to move, it is necessary to ensure that the driven gear 16 and the first spline wheel 18 are in a separated state, and also ensure that the driven gear 16 and the second spline wheel 19 are connected. According to the above, after the square seat 15 is driven to adjust and slide upward, the second spline wheel 19 and the second spline groove 1602 engage with each other, so that the driven gear 16 and the second spline wheel 19 form a synchronous rotation structure;

[0060] Since the lower end of the transmission rod 11 is sleeved and connected to the limiting ring through bolt fixation, after the transmission rod 11 is installed, the limiting ring fits on the lower side tube cavity wall of the square tube part of the plug column part 8, and the cam part 12 fits on the groove cavity wall in the plug column part 8 after installation. Through the mutual positioning of the limiting ring and the cam part 12 in the transmission rod 11, the lower section of the transmission rod 11 is movably positioned on the plug column part 8, and the two constitute a synchronous sliding structure. When the plug column part 8 is driven to move downward to seal the suction pipe 201, the transmission rod 11 moves downward synchronously with the plug column part 8, so that the transmission rod 11 drives the second spline wheel 19 moves downward synchronously, and causes the transmission rod 11 to slide in the tubular cavity of the screw column 10. Since the distance between the second spline wheel 19 and the second spline groove 1602 is greater than the maximum sliding distance of the plug column 8, when the plug column 8 slides downward to complete the sealing of the suction pipe 201, the transmission rod 11 drives the second spline wheel 19 to slide downward with the plug column 8. After sliding, the second spline wheel 19 does not contact the second spline groove 1602. The square seat 15 needs to drive the driven gear 16 to slide upward for adjustment to dock the second spline wheel 19 with the second spline groove 1602.

[0061] Since the second spline wheel 19 is movably inserted into the housing cavity of the auxiliary housing frame 7 after installation, it does not affect the rotation and sliding of the transmission rod 11. Since the shaft tube of the driven gear 16 is connected to the transmission rod 11 in a movably penetrating manner after installation, it does not affect the rotation and sliding of the transmission rod 11. Since the first spline wheel 18 is connected to the transmission rod 11 in a movably penetrating manner after installation, it does not affect the rotation and sliding of the transmission rod 11.

[0062] Since the screw column 10 is hollow and provided with a tubular cavity, wherein the upper and lower ends of the tubular cavity are both open, the transmission rod 11 is connected to the screw column 10 in a movable through-type manner after it is placed, and its upper and lower sections of the rod body respectively movably penetrate through the upper and lower end openings of the screw column 10 to extend outward, and its upwardly extending section of the rod body is movably inserted into the shell cavity of the auxiliary housing 7, and its downwardly extending section of the rod body is movably inserted into the groove cavity in the plug column member 8. Moreover, since the second spline wheel 19 is sleeved and fixedly connected to the upper end of the transmission rod 11 after it is placed and bolted, the driven gear 16 drives the second spline wheel 19 to rotate synchronously when it is driven to rotate, so that the second spline wheel 19 drives the transmission rod 11 to rotate synchronously, so that the transmission rod 11 rotates in the tubular cavity of the screw column 10, and the lower section of the transmission rod 11 rotates in the plug column member 8;

[0063] Since a ball bushing is installed at the connection between the upper rod body of the transmission rod 11 and the upper end opening of the screw column 10, it is used to assist the transmission rod 11 to rotate and slide stably on the screw column 10. Since a bearing is installed at the connection between the lower rod body of the transmission rod 11 and the plug column 8, it is used to assist the transmission rod 11 to rotate stably on the plug column 8.

[0064] Since an integrated shaft column is vertically downwardly provided at the rotation center of the cam member 12, wherein a bearing is fixedly clamped on the shaft column, the cam member 12 is placed in the groove cavity in the plug member 8 after installation, wherein the shaft column and the bearing are inserted into the groove cavity wall in the plug member 8, and since the cam member 12 is sleeved and fixedly connected to the lower end of the transmission rod 11 by bolts after installation, the two are arranged at the same rotation center. When the transmission rod 11 is driven to rotate, the transmission rod 11 and the cam member 12 form a synchronous rotation structure, so that the cam member 12 rotates in the groove cavity in the plug member 8;

[0065] Since the pushing plate 13 is arranged to be movably fixed in the groove cavity in the plug column member 8 after being placed, the pushing plate 13 is arranged in a semicircular structure at one end facing the cam member 12, and the semicircular end of the pushing plate 13 is connected to the cam member 12 in a pressing manner. Since a spring compartment is provided in the middle of the pushing plate 13, a first spring 14 is installed at the sliding connection between the pushing plate 13 and the plug column member 8. After the first spring 14 is arranged, it is movably inserted in the spring compartment of the pushing plate 13, and one end of the first spring 14 is clamped to the groove cavity wall in the plug column member 8. On, and its other end is clamped on the spring compartment wall of the pushing plate 13. After the cam member 12 is driven to rotate, the convex corner pushes the semicircular end of the pushing plate 13, causing the pushing plate 13 to shrink and slide in the plug column 8, and the first spring 14 is squeezed and elastically deformed. When the cam member 12 is driven to rotate, the convex corner loses its pushing effect on the semicircular end of the pushing plate 13, and the elastic deformation of the first spring 14 is used to reset, causing the pushing plate 13 to reset and extend and slide in the plug column 8.

[0066] Since the rack portion 1301 is arranged at the lower side of the pushing plate 13 in an integrated structure and is adapted to be connected with the half gear portion 901, and since the end of the clapper member 9 facing the plug member 8 is the inward end, and the end thereof facing away from the plug member 8 is the outward end, the half gear portion 901 is arranged at the inward end of the clapper member 9 in an integrated structure, and the two are arranged at the same flipping center. After the clapper member 9 is placed, the half gear portion 901 is inserted from the groove cavity on the lower side of the plug member 8 into the groove cavity in the plug member 8. Since the half gear portion 901 is meshed and connected with the rack portion 1301, after the pushing plate 13 is driven to retract and slide, the meshing action of the half gear portion 901 and the rack portion 1301 drives the clapper member 9 to perform a flipping and unfolding movement. On the contrary, after the pushing plate 13 is driven to extend and slide, the clapper member 9 is driven to perform a flipping and folding movement.

[0067] Since the inward end of the clapper member 9 is connected to the shaft column through the auxiliary rotation of the bearing, the clapper member 9 is movably clamped in the groove cavity on the lower side of the plug column member 8 after being placed, wherein the two ends of the shaft column are respectively clamped and fixedly connected to the groove cavity wall on the lower side of the plug column member 8 by bolts, the clapper member 9 is driven to flip and unfold or flip and fold on the lower side of the plug column member 8, and since the plug column member 8 is driven to move downward to complete the sealing of the suction pipe 201, the plug column member 8 drives the clapper member 9 to move downward synchronously, so that the clapper member 9 is docked with the filter element 4;

[0068] Since the filter element 4 is sealed and placed at the connection between the middle circular tube cavity and the lower circular tube cavity of the main housing 2, the clapper element 9 is driven to flip and unfold, and then extends outward from the groove cavity on the lower side of the plug element 8, knocking on the filter element 4, and automatically cleaning the filter element 4 by clapping;

[0069] Since the lower side of the plug member 8 is provided with a clapper member 9 in a circular array with its center as the center of the circle, and since the pushing plate 13 is arranged in a circular array with the rotation center of the cam member 12 as the center of the circle, each pushing plate 13 is arranged in a one-to-one correspondence with each clapper member 9. When the cam member 12 rotates one circle, the convex corner pushes each pushing plate 13 in turn, that is, each clapper member 9 is operated in turn to flip and unfold, so that each clapper member 9 slaps different points on the filter element 4 to ensure the uniformity of the slapping.

[0070] Specifically, in this technical solution, the pump-suction gas detector 1 performs a gas sample detection operation according to Figure 1 and Figure 2 As shown, the pump-suction gas detector 1 actively extracts gas samples through a micro air pump, which is suitable for confined spaces such as tunnels, long distances or scenes with uneven gas distribution. Since the pump-suction gas detector 1 actively extracts gas samples from the monitored environment in the tunnel through a built-in micro air pump, the gas samples are transported to the sensor along a specific pipe in the pump-suction gas detector 1 for corresponding detection (the monitoring method of the pump-suction gas detector 1 is an existing technology and will not be described in detail in the specification). Start the pump-suction gas detector 1 to operate and extract gas samples in the tunnel;

[0071] Since the lower end of the circular tube cavity in the middle and lower part of the main housing 2 is in an open state and is provided with an opening, wherein the opening is the gas sample inlet, and since a plurality of through holes are provided in a circular array with the center of the perforated end cap 5 as the center of the circle, the perforated end cap 5 is placed in a sleeve state to cover the lower end opening of the circular tube cavity in the middle and lower part of the main housing 2, and is threadedly fixed to the lower end of the main housing 2, when the pump-suction gas detector 1 extracts a gas sample, the gas sample enters the circular tube cavity in the middle and lower part of the main housing 2 through the through hole in the perforated end cap 5, and is initially filtered by the perforated end cap 5 to separate large-volume flocculent floating matter;

[0072] Since the filter element 4 is arranged in a cylindrical structure with an opening downward, it is divided into a curved side wall and a flat side wall. A dust filter plate is fixedly connected to the flat side wall of the filter element 4. The filter element 4 is arranged at the connection point between the middle circular tube cavity of the main shell frame 2 and the lower circular tube cavity of the main shell frame 2. A sealing ring is provided at the connection between the filter element 4 and the main shell frame 2 to seal the connection between the two. Since the suction pipe 201 is sealed and overlapped after installation and is fixedly connected to the air inlet of the pump-suction gas detector 1 by bolts, the two are arranged in a connected state. After preliminary filtration, the gas sample enters the middle circular tube cavity of the main shell frame 2 from the lower circular tube cavity of the main shell frame 2 after being fully filtered by the filter element 4, and then passes through the suction pipe 201 and the air inlet of the pump-suction gas detector 1 and enters the pump-suction gas detector 1 for analysis and detection.

[0073] Example 2:

[0074] The present invention is based on the first embodiment. Figure 11 The technical solution shown addresses the problem that the filtered dust cannot be collected centrally by providing a dust suction pipe 24 to collect the filtered dust centrally.

[0075] Specifically, in this technical solution, after the dust is filtered, the centralized collection operation is carried out according to Figure 11 As shown, the dust suction pipe 24 is an integrated structure provided on the right side wall of the lower end of the main housing frame 2. The dust suction pipe 24 is externally connected to a dust suction device (the dust suction device is prior art and is not described in the drawings of the specification). After the clapper 9 slaps the filter element 4, the dust blocked and adsorbed on the filter element 4 will be scattered into the lower circular tube cavity of the main housing frame 2, and the scattered dust will be discharged and collected through the dust suction pipe 24.

[0076] Since the perforated end cover 5 is installed at the lower end of the main housing 2 by means of a threaded connection, it can be disassembled. Since the curved side wall of the filter element 4 has a threaded structure, the filter element 4 is threadedly connected to the cavity wall of the main housing 2 after installation. A horizontal plate of an integrated structure is provided at the barrel mouth on the lower side of the filter element 4, and the filter element 4 can be rotated by screwing the horizontal plate to be disassembled and replaced.

[0077] This is the entire working process of the tunnel excavation harmful gas monitoring equipment. The contents not described in detail in this manual belong to the existing technology known to professional and technical personnel in this field.

[0078] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0079] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tunnel excavation harmful gas monitoring device, comprising: A pump-suction type gas detector (1), wherein the air inlet of the pump-suction type gas detector (1) is sealed and connected to an air intake pipe (201) provided on a main housing (2) in an integrated structure, and the air intake pipe (201) is provided in a connected state with a central circular tube cavity of the main housing (2); It is characterized by further comprising: A cleaning mechanism (3), the cleaning mechanism (3) being arranged in the middle circular tube cavity of the main housing (2), capable of automatically cleaning the filter element (4) by beating, and being used for sealing and plugging the suction pipe (201) before the filter element (4) is cleaned, the filter element (4) being sealed and arranged at the connection between the middle circular tube cavity and the lower circular tube cavity of the main housing (2), and a perforated end cap (5) being threadedly fixed to the lower end opening of the middle and lower circular tube cavity of the main housing (2); A driving mechanism (6) is arranged in a secondary housing (7) fixed to the upper end of the main housing (2), and is used to drive the cleaning mechanism (3) to move.

2. The tunnel excavation harmful gas monitoring device according to claim 1, characterized in that: The cleaning mechanism (3) includes a plug member (8) for sealing the suction pipe (201) and a clapper member (9) for clapping and cleaning the filter member (4), the plug member (8) forming a sliding structure in the central circular tube cavity of the main housing (2), and a flippable clapper member (9) is provided in a circular array on the lower side of the plug member (8) with its center as the center of the circle, a screw column (10) for driving the plug member (8) is connected to the inner thread of the square tube portion of the plug member (8), and the screw column (10) forms a rotating structure on the auxiliary housing (7), and a rotatable transmission rod (11) is slidably connected in the tube cavity of the screw column (10); The transmission rod (11) and the plug member (8) form a synchronous sliding structure, and the transmission rod (11) forms a rotating structure on the plug member (8), and the lower end of the transmission rod (11) is fixedly connected to a cam member (12) with the same rotation center as the transmission rod (11).

3. The tunnel excavation harmful gas monitoring device according to claim 2, characterized in that: The inner end of the clapper member (9) is provided with a half gear portion (901) having the same turning center as the clapper member (9), and the half gear portion (901) is meshed and connected with a rack portion (1301) provided on the pushing plate (13), and the semicircular end of the pushing plate (13) is connected to the cam member (12) in a pressing manner. The pushing plate (13) forms a telescopic sliding structure in the plug member (8), and a first spring (14) is installed at the sliding connection between the two.

4. The tunnel excavation harmful gas monitoring device according to claim 1, characterized in that: The driving mechanism (6) comprises a square seat (15) slidably connected in the auxiliary housing (7), a driven gear (16) rotatably connected to the left end of the square seat (15), and a driving gear (17) rotatably connected to the right end of the square seat (15), wherein the driven gear (16) and the driving gear (17) are meshed and connected together, a first spline groove (1601) of an integrated structure is provided at the lower end of the central shaft tube of the driven gear (16), and the first spline groove (1601) is connected to a first spline wheel (18) fixed to the upper end of the screw column (10) in a snap-fit ​​manner, and a second spline groove (1602) of an integrated structure is provided at the upper end of the central shaft tube of the driven gear (16), and the second spline groove (1602) is connected to a second spline wheel (19) fixed to the upper end of the transmission rod (11) in a snap-fit ​​manner.

5. The tunnel excavation harmful gas monitoring device according to claim 4, characterized in that: A telescopic electromagnet (20) for driving the square seat (15) to slide is installed on the connecting column portion, and a second spring (21) is installed at the sliding connection between the square seat (15) and the auxiliary housing (7).

6. The tunnel excavation harmful gas monitoring device according to claim 4, characterized in that: A driving motor (22) for driving the gear column (23) to rotate is fixedly installed in the auxiliary housing (7), and the gear column (23) is fixedly connected to the output end of the driving motor (22). The gear column (23) forms a sliding structure on the driving gear (17), and the gear column (23) is connected to the gear groove (1701) provided in the shaft tube of the driving gear (17) in a snap-fit ​​manner.

7. The tunnel excavation harmful gas monitoring device according to claim 1, characterized in that: The filter element (4) is threadedly connected to the cavity wall of the main housing (2) and can be disassembled and replaced on the main housing (2). The lower circular tube cavity of the main housing (2) is provided with an integrated dust suction pipe (24) for centrally collecting dust cleaned from the filter element (4).

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