Multi-channel limited space safety intelligent construction device and using method thereof

Abstract

The invention discloses a multi-channel limited space safe intelligent construction device and a using method thereof.The multi-channel limited space safe intelligent construction device comprises a ventilation mechanism, a switching mechanism and a telescopic pipe, the ventilation mechanism communicates with the telescopic pipe through a mounting mechanism, and the ventilation mechanism drives the telescopic pipe to discharge gas in different construction spaces; and the switching mechanism is arranged on the mounting mechanism and used for changing the gas output flow of the telescopic pipe and forming instantaneous impact force on the corners of the construction spaces at different positions. The switching mechanism is arranged on the mounting mechanism, and the switching mechanism is used for changing the gas output flow of the telescopic pipe and forming instantaneous impact force on the corners of the construction spaces at different positions. According to the invention, the plurality of groups of telescopic pipes can simultaneously carry out gas extraction detection on a plurality of groups of limited spaces, air can be firstly blown into the limited spaces in the detection process, and the gas flow and flow velocity of the three groups of telescopic pipes are changed by utilizing the conversion mechanism, so that a relatively large impact force can be formed; and therefore, gas at the corner position is quickly blown out.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular to a multi-channel limited space safe intelligent construction device and a use method thereof. Background Art

[0002] Confined space work refers to work performed in closed or partially closed spaces, such as underground pipelines, storage tanks, cellars, tunnels, etc. These spaces usually have dangers such as poor air circulation, lack of oxygen, and accumulation of toxic and harmful gases, which greatly threaten the life safety of workers.

[0003] When an existing limited space needs to be operated inside, it is necessary to analyze the gas content in the limited space. For example, Chinese patent (CN212483077U) discloses a gas detection device suitable for a limited space. The utility model relates to the technical field of gas detection in a limited space. The device includes a central processing unit, an SOS unit, a response unit, a display unit, a communication unit, a power supply unit, a positioning unit, a video monitoring unit, a sampler circuit 1, an air pump, a sampling gas circuit 2, an A\D conversion unit, a sensor and a voltage source. The data signal output end of the sampler circuit 1 is connected to the data signal input end of the air pump, the data signal output end of the air pump is connected to the data signal input end of the sampling gas circuit 2, the data signal output end of the sampling gas circuit 2 is connected to the data signal input end of the sensor, and the control signal output end of the central processing unit is connected to the control signal input end of the air pump; the utility model uses the sampler circuit 1, the air pump and the sampling gas circuit 2 to detect gas uncertainty in a limited space operation, and can perform continuous gas monitoring. It can be seen from the above content that in the process of gas detection in a confined space, the prior art can only detect harmful gases in the space, and multiple detections are required during the detection process to determine whether harmful gases still exist in the space. Therefore, an additional set of exhaust devices are required to extract them. When the existing exhaust device is in use, if there is a corner position in the confined space, the extraction effect is not good simply by using the exhaust device. Therefore, it may cause the gas in the confined space to be unable to be quickly removed. In addition, the existing exhaust device only extracts through a single channel during the extraction process. When there are multiple spaces in the confined space, the device needs to be fully placed, which wastes a lot of manpower and material resources to a certain extent. For this reason, we propose a multi-channel confined space safety intelligent construction device and a method for using it. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-channel confined space safe intelligent construction device and a method of using the same, so as to solve the problems in the background technology that harmful gases in the corners of confined spaces cannot be completely eliminated, and that the gas in the confined space cannot be completely safe and multiple spaces cannot work simultaneously.

[0005] To achieve the above object, the present invention provides the following technical solution: a multi-channel limited space safe intelligent construction device, comprising: An installation mechanism, the installation mechanism is used to fix and install three sets of telescopic tubes, and the telescopic tubes extend into the interior of the construction space at different positions; A ventilation mechanism, wherein the ventilation mechanism is connected to the telescopic tube through the mounting mechanism, and the ventilation mechanism drives the telescopic tube to discharge the internal gas of different construction spaces, and exchanges the gas of different construction spaces, so that the gas at the corner of the construction space is blown out by the exchanged gas; A conversion mechanism, which is arranged on the mounting mechanism and is used to change the gas output flow rate of the telescopic tube, so that the gas flow rate and flow rate of the multiple groups of telescopic tubes are increased in sequence, thereby forming an instantaneous impact force on the corners of the construction space at different positions; A gas detection sensor interface, which is fixedly connected to the ventilation mechanism through a three-way valve, and is used to collect exhaust gas from the ventilation mechanism and detect and analyze the exhaust gas sample using a controller; A gas temperature and humidity detector interface, which is fixedly connected to the ventilation mechanism through a three-way valve, and is used to collect exhaust gas from the ventilation mechanism and analyze the exhaust gas sample temperature and humidity using a controller; A controller, the controller is electrically connected to the gas detection sensor interface and the gas temperature and humidity detector interface, analyzes the exhaust gas samples collected by the gas detection sensor interface and the gas temperature and humidity detector interface, and performs data conversion on the analyzed gas samples; A battery pack is used to supply power to the controller, the ventilation mechanism and the conversion mechanism.

[0006] In the prior art, during the process of gas detection in a confined space, only harmful gases in the space can be detected, and multiple detections are required during the detection process to determine whether the harmful gases in the space still exist. Therefore, an additional set of exhaust devices is required to extract them. When the existing exhaust devices are used, if there is a corner position in the confined space, the extraction effect of simply using the exhaust device is not good, so it may cause the gas in the confined space to be unable to be quickly removed. In addition, the existing exhaust devices only extract through a single channel during the extraction process. When there are multiple spaces in the confined space, the devices need to be fully placed, which wastes a lot of manpower and material resources to a certain extent. The telescopic tubes provided in the present invention can be extended into the confined space, and multiple sets of telescopic tubes can simultaneously perform gas extraction detection on multiple sets of confined spaces. In the detection process, air can be first blown into the confined space, and the conversion mechanism can be used to change the gas of the three sets of telescopic tubes. The volume flow rate and flow rate can form a larger impact force, thereby quickly blowing out the gas at the corner, and the three sets of telescopic tubes are switched through the conversion mechanism to present three states of full open, semi-sealed and sealed, which can form an instantaneous impact force to rush out the harmful gas, and after a gas is completely rushed out, the telescopic tube is gradually converted to a semi-sealed and sealed state, which can provide time for the gas with instantaneous impact force to mix with the harmful gas, and will not cause waste of instantaneous impact force gas, which improves the gas extraction efficiency to a certain extent, thereby facilitating the complete extraction of gas in the space, and then the extracted gas can use the gas detection sensor interface and the gas temperature and humidity detector interface to quickly detect and analyze the extracted gas. This gas extraction method improves the air extraction and air intake strength at corners and bends, so that the air at the corners has a certain fluidity, thereby reducing the presence of turbid air in confined spaces, and further enhancing the safety of confined space construction.

[0007] As a further description of the above technical solution: The ventilation mechanism includes an axial flow fan, a detection sampling tube and support legs. Two groups of support legs are fixedly installed on the bottom of the axial flow fan. A detection sampling tube is penetrated through the top of the support leg. The detection sampling tube is connected to the gas detection sensor interface and the gas temperature and humidity detector interface through a three-way valve and a connecting pipe.

[0008] As a further description of the above technical solution: The mounting mechanism includes a diverter plate, a first reinforcement rod and a mounting plate. One end of the axial flow fan is fixedly connected to the diverter plate. One side of the diverter plate is fixedly connected to the mounting plate through multiple groups of first reinforcement rods. Three groups of telescopic tubes are fixedly installed on the mounting plate. One side of the telescopic tube is fixedly connected to the diverter plate through an elastic connecting tube.

[0009] As a further description of the above technical solution: The conversion mechanism includes a pad, a positioning ring, a pressure plate, a driving motor and a rotating wheel. A pad is fixedly connected to one side of the diverter plate and located outside the elastic connecting tube. A positioning ring is fixedly connected to one side of the diverter plate through multiple groups of second reinforcement rods. A telescopic rod is slidably connected to the positioning ring at positions corresponding to the three groups of elastic connecting tubes. An arc-shaped pressure plate is fixedly connected to one end of the telescopic rod. A driving motor is installed on one side of the mounting plate. A rotating wheel is fixedly connected to the output end of the driving motor. A first cam that pushes the pressure plate to seal the elastic connecting tube is fixedly connected to the outer surface of the rotating wheel. A second cam that pushes the pressure plate to move and reduces the ventilation flow of the elastic connecting tube is fixedly installed on the outer surface of the rotating wheel.

[0010] As a further description of the above technical solution: It also includes a power supply converter, a containing box and a placement plate, wherein the placement plate is fixedly installed on the top of the containing box, a sealing cover is hinged on one side of the containing box, a buffer pad is laid inside the sealing cover, a power supply interface electrically connected to an external DC power supply is provided on one side of the containing box, the controller and the battery pack are arranged inside the containing box, the gas detection sensor interface and the gas temperature and humidity detector interface are arranged on one side of the containing box, the power supply converter is fixedly installed inside the containing box, and the power supply converter is used to convert the power supply mode of the controller, ventilation mechanism and conversion mechanism into DC power supply or battery pack power supply.

[0011] As a further description of the above technical solution: A heat sink is fixedly installed inside the storage box and above the controller and the battery pack, and two sets of exhaust fans are fixedly installed on one side of the storage box and at positions corresponding to the heat sink.

[0012] As a further description of the above technical solution: It also includes a detection display, which is placed on the placement board and is electrically connected to the controller. The detection display is used to display the gas analysis result of the controller.

[0013] As a further description of the above technical solution: It also includes an audible and visual alarm, which is electrically connected to the controller. When the controller detects that the harmful substance content in the gas sample exceeds a threshold, the audible and visual alarm is triggered to sound an alarm.

[0014] As a further description of the above technical solution: The method for using the multi-channel limited space safe intelligent construction device comprises the following steps: Step 1: Set the working mode according to the construction space environment; Step 2: Use the ventilation mechanism and telescopic tube to extract gas samples from the target construction space. When the controller detects harmful gas during the gas sample extraction process, the sound and light alarm will sound an alarm, and the gas extraction process at the target position will be carried out according to the corresponding working mode; Step 3: The controller drives the ventilation mechanism to execute the gas extraction process. When the controller detects that the harmful gas content is lower than the set threshold, the sound and light alarm stops working and the gas extraction process is completed.

[0015] As a further description of the above technical solution: The working mode set in the step 1 includes a first working mode and a second working mode; The first working mode comprises the following steps: Step A1: placing multiple sets of telescopic tubes into different construction spaces, and controlling the ventilation mechanism to extract gas from the construction space under negative pressure according to the detection threshold set by the sound and light alarm; Step A2: Use the battery pack to power the ventilation mechanism to circulate air and exchange gas in the construction space; The second working mode comprises the following steps: Step B1: Controlling the operation of the conversion mechanism according to the working mode set by the controller; Step B2: The battery pack is used to power the ventilation mechanism and the conversion mechanism, and the ventilation mechanism is used to continuously circulate and exchange air in the construction space. When the gas in the construction space is extracted, the conversion mechanism stops operating, and the three groups of telescopic tubes are in a fully open state. The harmful gas in the construction space is extracted within a set time. When the extraction stops between the set times, the conversion mechanism is started to operate. The conversion mechanism drives the three groups of telescopic tubes to switch between fully open, semi-open and sealed states respectively. When one group of telescopic tubes is in a fully open state, one of the other two groups of telescopic tubes is in a semi-open state, and the other is in a sealed state. In this way, the gas flow of the fully open telescopic tubes can be increased, forming a high-impact extraction or blowing action, and the working method in the above working mode is repeated.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The telescopic tubes provided in the present invention can be extended into the limited space, and multiple sets of telescopic tubes can simultaneously perform gas extraction detection on multiple sets of limited spaces, and during the detection process, air can be blown into the limited space first, and the gas flow rate and flow rate of the three sets of telescopic tubes can be changed by using a conversion mechanism, so that a larger impact force can be formed, thereby quickly blowing out the gas at the corner position, and the three sets of telescopic tubes are switched by the conversion mechanism to present three states of full opening, semi-sealed and sealed, so that an instant impact force can be formed to rush out the harmful gas, and after a gas is completely rushed out, the telescopic tubes are gradually converted to semi-sealed. Sealed and sealed state, which can provide time for the gas with instantaneous impact force to mix with harmful gases, and will not cause waste of instantaneous impact force gas, which improves the gas extraction efficiency to a certain extent, so as to facilitate the complete extraction of gas in the space. The extracted gas can then use the gas detection sensor interface and the gas temperature and humidity detector interface to quickly detect and analyze the extracted gas. This gas extraction method improves the air extraction and air intake strength at corners and bends, so that the air at the corners has a certain fluidity, thereby reducing the presence of turbid air in the confined space and further enhancing the safety of confined space construction; 2. This method of internal gas discharge in a confined space improves the efficiency of gas discharge to a certain extent, and can detect the gas simultaneously during the gas discharge process, thereby ensuring that the harmful gas in the confined space is fully discharged and no safety hazards will occur; 3. The device is easy to operate and can automatically realize the rapid discharge of gas in a limited space, which to a certain extent avoids excessive manual operation and reduces dependence on professional technicians. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the system principle of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the conversion mechanism of the present invention; Figure 4 This is a schematic diagram of the first stereoscopic structure of the storage box of the present invention; Figure 5 This is a second stereoscopic structural diagram of the storage box of the present invention; Figure 6 It is a schematic diagram of the internal structure of the three-dimensional view of the containing box of the present invention.

[0018] In the figure: 1 controller, 2 ventilation mechanism, 3 mounting mechanism, 4 conversion mechanism, 5 battery pack, 6 power supply converter, 7 gas detection sensor interface, 8 gas temperature and humidity detector interface, 9 axial flow fan, 10 detection sampling tube, 11 support leg, 12 diverter plate, 13 first reinforcement rod, 14 mounting plate, 15 telescopic tube, 16 elastic connecting tube, 17 pad, 18 second reinforcement rod, 19 positioning ring, 20 telescopic rod, 21 pressure plate, 22 driving motor, 23 rotating wheel, 24 first cam, 25 second cam, 26 containing box, 27 placement plate, 28 detection display, 29 sealing cover, 30 buffer pad, 31 power supply interface, 32 heat sink, 33 exhaust fan. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 6 The present invention provides a technical solution: a multi-channel limited space safety intelligent construction device, comprising: An installation mechanism 3, the installation mechanism 3 is used to fix and install three sets of telescopic tubes 15, and the telescopic tubes 15 extend into the interior of the construction space at different positions; The ventilation mechanism 2 is connected to the telescopic tube 15 through the mounting mechanism 3. The ventilation mechanism 2 drives the telescopic tube 15 to discharge the internal gas of different construction spaces and to exchange the gas of different construction spaces so that the gas at the corner of the construction space is blown out by the exchange gas. The conversion mechanism 4 is arranged on the mounting mechanism 3, and is used to change the gas output flow rate of the telescopic tube 15, so that the gas flow rate and flow rate of the multiple groups of telescopic tubes 15 are increased in sequence, thereby forming an instantaneous impact force on the corners of the construction space at different positions; A gas detection sensor interface 7, wherein the gas detection sensor interface 7 is fixedly connected to the ventilation mechanism 2 through a three-way valve, and the gas detection sensor interface 7 is used to collect exhaust gas from the ventilation mechanism 2, and to detect and analyze the exhaust gas sample using the controller 1; A gas temperature and humidity detector interface 8, wherein the gas temperature and humidity detector interface 8 is fixedly connected to the ventilation mechanism 2 through a three-way valve, and the gas temperature and humidity detector interface 8 is used to collect exhaust gas from the ventilation mechanism 2, and analyze the exhaust gas sample temperature and humidity using the controller 1; A controller 1, wherein the controller 1 is electrically connected to the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8, analyzes the exhaust gas samples collected by the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8, and performs data conversion on the analyzed gas samples; A battery pack 5 is provided to supply power to the controller 1 , the ventilation mechanism 2 and the conversion mechanism 4 .

[0021] Among them, the telescopic tube 15 can be extended into the limited space, and multiple groups of telescopic tubes 15 can simultaneously perform gas extraction detection on multiple groups of limited spaces, and then the battery pack 5 supplies power to the entire device. In the detection process, the ventilation mechanism 2 can be used to blow air into the limited space, and the conversion mechanism 4 can be used to change the gas flow and flow rate of the three groups of telescopic tubes 15, so that a larger impact force can be formed, thereby quickly blowing out the gas at the corner position, and the three groups of telescopic tubes 15 are switched by the conversion mechanism to present three states of fully open, semi-sealed and sealed, so that an instantaneous impact force can be formed when the telescopic tube 15 is fully open to make the harmful gas rush out, and one After the gas is completely rushed out, the telescopic tube 15 is gradually converted into a semi-sealed and sealed state, which can provide time for the gas with instantaneous impact force to mix with the harmful gas, and will not cause waste of instantaneous impact force gas, thereby improving the gas extraction efficiency to a certain extent, thereby facilitating the complete extraction of gas in the space, and then the extracted gas can use the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 to quickly detect and analyze the extracted gas. This gas extraction method improves the air extraction and air intake strength at corners, bends, etc., so that the air at the corners has a certain fluidity, thereby reducing the presence of turbid air in the confined space, and further enhancing the safety of confined space construction.

[0022] See also Figure 1 The ventilation mechanism 2 includes an axial flow fan 9, a detection sampling tube 10 and a support leg 11. Two groups of support legs 11 are fixedly installed at the bottom of the axial flow fan 9. The top of the support leg 11 is penetrated by a detection sampling tube 10. The detection sampling tube 10 is connected to the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 through a three-way valve and a connecting pipe.

[0023] Among them, when it is necessary to use the telescopic tube 15 for suction or blowing work, the setting of the axial flow fan 9 can provide extraction force or blowing force, and when it is necessary to extract harmful gases inside a limited space, the set detection sampling tube 10 can be connected to the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 through a three-way valve and a connecting pipe, so that the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 can be used to detect the extracted gas.

[0024] See also Figure 1 The mounting mechanism 3 includes a diverter plate 12, a first reinforcement rod 13 and a mounting plate 14. One end of the axial flow fan 9 is fixedly connected to the diverter plate 12. One side of the diverter plate 12 is fixedly connected to the mounting plate 14 through multiple groups of first reinforcement rods 13. Three groups of telescopic tubes 15 are fixedly installed on the mounting plate 14. One side of the telescopic tube 15 is fixedly connected to the diverter plate 12 through an elastic connecting tube 16.

[0025] Among them, the diverter plate 12 can divide the gas generated by the axial flow fan 9 into three groups, so that the three groups of telescopic tubes 15 can be used to extract or blow in the gas, and the connecting tube 15 is fixed by the mounting plate 14, and then the conversion mechanism 4 set can contact the elastic connecting tube 16, so that the elastic connecting tube 16 can be squeezed by the conversion mechanism 4, thereby changing the wind inlet and outlet flow and flow rate of the telescopic tube 15.

[0026] See also Figure 1 and Figure 3 The conversion mechanism 4 includes a pad 17, a positioning ring 19, a pressure plate 21, a drive motor 22 and a runner 23. The pad 17 is fixedly connected to one side of the diverter plate 12 and located outside the elastic connecting tube 16. The positioning ring 19 is fixedly connected to one side of the diverter plate 12 through multiple groups of second reinforcing rods 18. A telescopic rod 20 is slidably connected to the positioning ring 19 and corresponding to the positions of the three groups of elastic connecting tubes 16. One end of the telescopic rod 20 is fixedly connected to an arc-shaped pressure plate 21. A drive motor 22 is installed on one side of the mounting plate 14. A runner 23 is fixedly connected to the output end of the drive motor 22. The outer surface of the runner 23 is fixedly connected to a first cam 24 that pushes the pressure plate 21 to seal the elastic connecting tube 16. The outer surface of the runner 23 is fixedly installed with a second cam 25 that pushes the pressure plate 21 to move and reduces the ventilation flow of the elastic connecting tube 16.

[0027] When the flow rate and flow rate of the telescopic tube 15 need to be changed, the drive motor 22 is started to operate. The drive motor 22 can drive the rotating wheel 23, the first cam 24 and the second cam 25 to rotate. When the first cam 24 and the second cam 25 rotate, they can contact the telescopic rod 20. When the first cam 24 contacts the telescopic rod 20, it pushes the corresponding telescopic rod 20 and the pressure plate 21 to move up, so that the pressure plate 21 and the pad 17 can be used to seal one group of elastic connecting tubes 16, and at this time, the second cam 25 can push the pressure plate 21 to move up, and can present a semi-sealed state to another group of elastic connecting tubes 16, and the last group of elastic connecting tubes 16 is in a fully open state, so that the flow rate and flow rate output by the elastic connecting tubes 16 in the fully open state will increase, thereby forming an impact force in the limited space, which is convenient for blowing out harmful gases in the corners of the space, and then with the continuous rotation of the drive motor 22, the three groups of telescopic tubes 16 can be continuously in a fully open state, so that the axial flow fan 9 can be used to deliver a constant pressure to achieve gas impact.

[0028] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 , also includes a power supply converter 6, a containing box 26 and a placement plate 27, the placement plate 27 is fixedly installed on the top of the containing box 26, a sealing cover 29 is hinged on one side of the containing box 26, a buffer pad 30 is laid inside the sealing cover 29, a power supply interface 31 electrically connected to an external DC power supply is provided on one side of the containing box 26, the controller 1 and the battery pack 5 are arranged inside the containing box 26, the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 are arranged on one side of the containing box 26, the power supply converter 6 is fixedly installed inside the containing box 26, and the power supply converter 6 is used to convert the power supply mode of the controller 1, the ventilation mechanism 2 and the conversion mechanism 4 into DC power supply or battery pack 5 power supply.

[0029] Among them, the power supply converter 6 can realize the conversion between DC power and battery pack 5 power supply mode. When the distance from the DC power supply is far away, the battery pack 5 can be used for power supply, and the power supply interface 31 can be connected to an external DC power supply to charge the battery pack 5.

[0030] See also Figure 1 , Figure 5 and Figure 6 A heat sink 32 is fixedly installed inside the storage box 26 and above the controller 1 and the battery pack 5. Two sets of exhaust fans 33 are fixedly installed on one side of the storage box 26 and corresponding to the position of the heat sink 32.

[0031] The heat sink 32 can quickly transfer the heat generated by the controller 1 and the battery pack 5 , and the exhaust fan 33 can quickly bring the generated heat out of the storage box 26 .

[0032] See also Figure 1 and Figure 4 , also includes a detection display 28, which is placed on the placement plate 27, and the detection display 28 is electrically connected to the controller 1. The detection display 28 is used to display the gas analysis result of the controller 1, and also includes an audible and visual alarm, which is electrically connected to the controller 1. When the controller 1 detects that the content of harmful substances in the gas sample exceeds a threshold, the audible and visual alarm is triggered to sound an alarm.

[0033] Among them, the detection display 28 set up can intuitively display the harmful gas data converted by the controller, which is convenient for the staff to observe in real time, and the sound and light alarm set up can trigger the sound and light alarm to sound an alarm when the controller 1 detects that the harmful substance content of the gas sample exceeds the threshold, which is convenient for the staff to monitor remotely, and there is no need for manual close-range detection of the harmful gas residue when the harmful gas is discharged.

[0034] Example 2: Please refer to Figure 1 and Figure 2 The method for using the multi-channel limited space safety intelligent construction device comprises the following steps: Step 1: Set the working mode according to the construction space environment; Step 2: Place the telescopic tube 15 into the corresponding limited space, then start the ventilation mechanism 2, and use the telescopic tube 15 to extract gas samples from the target construction space. During the gas sample extraction process, a part of the gas extracted from the ventilation mechanism 2 is transported to the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 through the three-way valve and the connecting pipe, and the controller 1 is used to detect and analyze the harmful gas content and the gas temperature and humidity. When the controller 1 detects that the gas contains harmful gases, the sound and light alarm sounds an alarm, and the gas extraction process at the target position in the limited space is continued according to the corresponding working mode; Step three: the controller 1 drives the ventilation mechanism 2 to continuously perform the gas extraction process. When the controller 1 detects that the harmful gas content is lower than the set threshold through the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8, the sound and light alarm stops working and the gas extraction process is completed.

[0035] See also Figure 1 , Figure 2 and Figure 3 , the working mode set in step 1 includes a first working mode and a second working mode; The first working mode comprises the following steps: Step A1: placing multiple sets of telescopic tubes 15 into different construction spaces, and controlling the ventilation mechanism 2 to extract gas from the construction space in a negative pressure manner according to the detection threshold set by the sound and light alarm; Step A2: using the battery pack 5 to supply power to the ventilation mechanism 2 to circulate air and exchange gas in the construction space; First, the axial flow fan 9 is started to work, and the axial flow fan 9 provides suction force, and the axial flow fan 9 and the telescopic tube 15 can be used to extract gas. When the gas is extracted, the gas extracted by the axial flow fan 9 is transported to the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 through the detection sampling tube 10, the three-way valve and the connecting tube, and the controller 1 is used to detect and analyze the harmful gas content and the gas temperature and humidity; Secondly, the controller 1 analyzes the extracted gas and displays it on the detection display 28. When the sound and light alarm detects that the harmful substances in the gas exceed the threshold, the sound and light alarm sounds an alarm, and the axial flow fan 9 continues to work; Finally, when the controller 1 detects that the harmful gas content in the gas is lower than the threshold value, the sound and light alarm is turned off. At this time, the axial flow fan 9 is turned off to complete the harmful gas extraction process in the limited space.

[0036] In addition to the first working mode, this embodiment also includes a second working mode, which is different from the first working mode of the default setting in that the second working mode includes the following sub-steps: Step B1: According to the controller 1, the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 detecting that the harmful substances in the extracted gas are always higher than the threshold value to a certain extent, the second working mode is turned on and the conversion mechanism 4 is started to operate; Step B2: First, the battery pack 5 is used to power the ventilation mechanism 2 and the conversion mechanism 4, and the ventilation mechanism 2 is used to continuously circulate and exchange air in the construction space. When extracting gas in the construction space, the conversion mechanism 4 stops operating, and the three sets of telescopic tubes 15 are in a fully open state, and the harmful gas in the construction space is extracted within a set time; Secondly, when the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 detect that the harmful gas is slightly higher than the set threshold within a certain period of time, the axial flow motor 9 rotates in the opposite direction and starts the conversion mechanism 4 to operate. The conversion mechanism 4 can squeeze the three groups of telescopic tubes 15, and the three groups of telescopic tubes 15 are switched between fully open, semi-open and sealed states respectively. When one group of telescopic tubes 15 is in a fully open state, one of the other two groups of telescopic tubes 15 is in a semi-open state, and the other group is in a sealed state. In this way, the gas flow of the fully open telescopic tubes 15 can be increased, forming a large impact extraction or blowing action, so that an instantaneous impact force can be formed to rush out the harmful gas, and after a gas rushes out completely, the telescopic tube gradually switches to a semi-sealed and sealed state, so that the gas with instantaneous impact force has time to provide mixing time with the harmful gas, and it will not cause waste of instantaneous impact force gas, thereby improving the gas extraction efficiency to a certain extent; Again, after the gas is continuously blown out of the telescopic tube 15, the gas at the corner in the confined space is blown out, and then the conversion mechanism 4 stops working, and the axial flow fan 9 changes the rotation mode again, and the axial flow fan 9 is used to extract the gas in the confined space, and the working method in the above working mode is repeated. When the content of harmful substances detected by the gas detection sensor interface 7 and the gas temperature and humidity detector interface 8 is lower than the set threshold value, the sound and light alarm stops working, and the gas content detection and gas discharge in the confined space can be completed.

[0037] Finally, it also includes a custom working mode, which allows the operator to customize the forward and reverse rotation duration and forward and reverse switching time of the axial flow fan 9 according to the harmful gas content detected by the initial state gas detection sensor interface 7 and the gas temperature and humidity detector interface 8, and the duration of the three states of full opening, semi-sealed and sealed of the telescopic tube 15, and allows the definition of its circulation mode. This mode can be opened after obtaining the highest control authority.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-channel limited space safe intelligent construction device, characterized by: include: An installation mechanism (3), the installation mechanism (3) being used to fix and install three sets of telescopic tubes (15), the telescopic tubes (15) extending into the interior of the construction space at different positions; A ventilation mechanism (2), the ventilation mechanism (2) being connected to the telescopic tube (15) via the mounting mechanism (3), the ventilation mechanism (2) driving the telescopic tube (15) to discharge gas inside different construction spaces, and to exchange gas between different construction spaces, so that gas at corners of the construction spaces is blown out by the exchanged gas; A conversion mechanism (4), the conversion mechanism (4) being arranged on the mounting mechanism (3), the conversion mechanism (4) being used to change the gas output flow rate of the telescopic tube (15), so that the gas flow rate and flow rate of the plurality of groups of telescopic tubes (15) are increased in sequence, thereby forming an instantaneous impact force on the corners of the construction space at different positions; A gas detection sensor interface (7), the gas detection sensor interface (7) being fixedly connected to the ventilation mechanism (2) via a three-way valve, the gas detection sensor interface (7) being used to collect exhaust gas from the ventilation mechanism (2), and to detect and analyze the exhaust gas sample using the controller (1); a gas temperature and humidity detector interface (8), the gas temperature and humidity detector interface (8) being fixedly connected to the ventilation mechanism (2) via a three-way valve, the gas temperature and humidity detector interface (8) being used to collect exhaust gas from the ventilation mechanism (2), and to analyze the exhaust gas sample temperature and humidity using the controller (1); A controller (1), the controller (1) being electrically connected to the gas detection sensor interface (7) and the gas temperature and humidity detector interface (8), analyzing exhaust gas samples collected by the gas detection sensor interface (7) and the gas temperature and humidity detector interface (8), and performing data conversion on the analyzed gas samples; A battery pack (5), wherein the battery pack (5) supplies power to the controller (1), the ventilation mechanism (2) and the conversion mechanism (4).

2. A multi-channel limited space safe intelligent construction device according to claim 1, characterized in that: The ventilation mechanism (2) comprises an axial flow fan (9), a detection sampling tube (10) and a support leg (11); two sets of support legs (11) are fixedly mounted on the bottom of the axial flow fan (9); a detection sampling tube (10) is provided through the top of the support leg (11); the detection sampling tube (10) is connected to a gas detection sensor interface (7) and a gas temperature and humidity detector interface (8) via a three-way valve and a connecting tube.

3. A multi-channel limited space safe intelligent construction device according to claim 2, characterized in that: The mounting mechanism (3) comprises a diverter plate (12), a first reinforcement rod (13) and a mounting plate (14); one end of the axial flow fan (9) is fixedly connected to the diverter plate (12); one side of the diverter plate (12) is fixedly connected to the mounting plate (14) via a plurality of groups of first reinforcement rods (13); three groups of telescopic tubes (15) are fixedly mounted on the mounting plate (14); one side of the telescopic tubes (15) is fixedly connected to the diverter plate (12) via an elastic connecting tube (16).

4. A multi-channel limited space safe intelligent construction device according to claim 3, characterized in that: The conversion mechanism (4) comprises a pad (17), a positioning ring (19), a pressure plate (21), a drive motor (22) and a rotating wheel (23); the pad (17) is fixedly connected to one side of the diverter plate (12) and located outside the elastic connecting tube (16); the positioning ring (19) is fixedly connected to one side of the diverter plate (12) via a plurality of groups of second reinforcing rods (18); a telescopic rod (20) is slidably connected to the positioning ring (19) and at positions corresponding to the three groups of elastic connecting tubes (16); the telescopic rod ( An arc-shaped pressing plate (21) is fixedly connected to one end of the mounting plate (14), a driving motor (22) is mounted on one side of the mounting plate (14), a rotating wheel (23) is fixedly connected to the output end of the driving motor (22), a first cam (24) is fixedly connected to the outer surface of the rotating wheel (23) for pushing the pressing plate (21) to seal the elastic connecting tube (16), and a second cam (25) is fixedly mounted on the outer surface of the rotating wheel (23) for pushing the pressing plate (21) to move and reducing the ventilation flow of the elastic connecting tube (16).

5. A multi-channel limited space safe intelligent construction device according to claim 4, characterized in that: The device also comprises a power supply converter (6), a storage box (26) and a placement plate (27); the placement plate (27) is fixedly mounted on the top of the storage box (26); a sealing cover (29) is hingedly mounted on one side of the storage box (26); a buffer pad (30) is laid inside the sealing cover (29); a power supply interface (31) electrically connected to an external DC power supply is arranged on one side of the storage box (26); the controller (1) and the battery pack (5) are arranged inside the storage box (26); the gas detection sensor interface (7) and the gas temperature and humidity detector interface (8) are arranged on one side of the storage box (26); the power supply converter (6) is fixedly mounted inside the storage box (26); and the power supply converter (6) is used to convert the power supply mode of the controller (1), the ventilation mechanism (2) and the conversion mechanism (4) into power supply by a DC power supply or power supply by a battery pack (5).

6. A multi-channel limited space safe intelligent construction device according to claim 5, characterized in that: A heat sink (32) is fixedly installed inside the storage box (26) and above the controller (1) and the battery pack (5), and two sets of exhaust fans (33) are fixedly installed on one side of the storage box (26) and at positions corresponding to the heat sink (32).

7. A multi-channel limited space safe intelligent construction device according to claim 6, characterized in that: It also includes a detection display (28), the detection display (28) being placed on the placement plate (27), the detection display (28) being electrically connected to the controller (1), and the detection display (28) being used to display the gas analysis result of the controller (1).

8. The multi-channel limited space safe intelligent construction device according to claim 7, characterized in that: It also includes an audible and visual alarm, which is electrically connected to the controller (1). When the controller (1) detects that the content of harmful substances in the gas sample exceeds a threshold value, the audible and visual alarm is triggered to sound an alarm.

9. A method for using a multi-channel confined space safe intelligent construction device, applicable to the confined space safe intelligent construction device according to any one of claims 1 to 8, characterized in that: The method for using the multi-channel limited space safe intelligent construction device comprises the following steps: Step 1: Set the working mode according to the construction space environment; Step 2: extracting gas samples from the target construction space using the ventilation mechanism (2) and the telescopic tube (15); when the controller (1) detects harmful gas during the gas sample extraction process, the sound and light alarm sounds an alarm, and the gas extraction process at the target location is performed according to the corresponding working mode; Step 3: The controller (1) drives the ventilation mechanism (2) to execute the gas extraction process. When the controller (1) detects that the harmful gas content is lower than the set threshold, the sound and light alarm stops working and the gas extraction process is completed.

10. The method for using a multi-channel limited space safety intelligent construction device according to claim 9, characterized in that: The working mode set in the step 1 includes a first working mode and a second working mode; The first working mode comprises the following steps: Step A1: placing multiple sets of telescopic tubes (15) into different construction spaces, and controlling the ventilation mechanism (2) to extract gas from the construction space under negative pressure according to the detection threshold set by the sound and light alarm; Step A2: using the battery pack (5) to supply power to the ventilation mechanism (2) to circulate air and exchange gas in the construction space; The second working mode comprises the following steps: Step B1: controlling the conversion mechanism (4) to operate according to the working mode set by the controller (1); Step B2: The battery pack (5) is used to power the ventilation mechanism (2) and the conversion mechanism (4), and the ventilation mechanism (2) is used to continuously circulate and exchange air in the construction space. When extracting gas in the construction space, the conversion mechanism (4) stops operating, and the three groups of telescopic tubes (15) are in a fully open state. The harmful gas in the construction space is extracted within a set time. When the extraction stops within the set time, the conversion mechanism (4) is started to operate. The conversion mechanism (4) drives the three groups of telescopic tubes (15) to switch between a fully open state, a semi-open state, and a sealed state. When one group of telescopic tubes (15) is in a fully open state, one of the other two groups of telescopic tubes (15) is in a semi-open state, and the other is in a sealed state. In this way, the gas flow rate of the fully open telescopic tube (15) is increased, forming a large-impact extraction or blowing action, and the working method in the above working mode is repeated.

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