Device for preventing harmful gas from escaping

Abstract

The invention relates to the technical field of waste gas absorption equipment, in particular to a harmful gas dissipation prevention device which comprises a pump machine, a communicating pipe, a waste gas control system and the like. The pump machine communicates with a communicating pipe through a connecting pipe; the two ends of the communicating pipe are each connected with at least one waste gas control system, and the two waste gas control systems located at the same horizontal position from top to bottom work oppositely. Through work of the waste gas control system, the problems that in the prior art, harmful gas overflowing from a bin door cannot be effectively and rapidly absorbed, the harmful gas in the bin overflows, and the surrounding environment is affected are solved; through the arrangement of the air guide sheets, the concentration degree of a high-pressure area is reduced, and the dissipation amount is lower; and the problem that after the two oblique airflows collide with each other, an overflowed air mass still can be generated to influence the external environment is solved.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas absorption equipment, and in particular to a device for preventing harmful gas from escaping. Background Art

[0002] In the prior art, when storing items that are prone to emitting harmful gases, they are placed in relatively sealed closed warehouses (garbage stations, chemical storage warehouses, etc.), and purification equipment is installed to extract the harmful gases volatilized in the closed warehouse;

[0003] The harmful gas is drawn to the purification equipment through the air duct, and then goes through processes such as plasma purification, UV photolysis and activated carbon adsorption, and then the purified gas is discharged;

[0004] However, the existing purification technology can only work efficiently if the closed chamber must always maintain a "micro-negative pressure environment" to prevent the harmful gases in the closed chamber from overflowing through the gaps in the closed chamber connection and all of them are drawn into the equipment for treatment;

[0005] However, in actual use, it is often necessary to open the door of a closed warehouse to take out items in the warehouse. At this time, the door is open and a negative pressure environment cannot be formed in the closed warehouse. The existing technology cannot effectively and quickly absorb the harmful gases overflowing from the door, causing the harmful gases in the warehouse to overflow and affect the surrounding environment. Summary of the invention

[0006] In order to overcome the disadvantage that the prior art cannot effectively and quickly absorb harmful gases overflowing from the warehouse door, causing the harmful gases in the warehouse to overflow, the present invention provides a device for preventing harmful gases from escaping.

[0007] The technical solution of the present invention is: a device for preventing harmful gas from escaping, comprising a pump, a connecting pipe and an exhaust gas control system; the pump is connected to the connecting pipe through a connecting pipe; at least one exhaust gas control system is connected to each of the two ends of the connecting pipe, and the two exhaust gas control systems at the same horizontal position from a top-down perspective work towards each other; it also includes a slide rail, a slider, an air inlet, an air outlet and a switch monitoring component; the connecting pipe is connected to at least two sliders; all the sliders are connected to a slide rail in common; the pump is provided with an air inlet and an air outlet; the connecting pipe is retractably arranged.

[0008] More preferably, the exhaust gas control system on the left includes a first connecting pipe, a jet chamber, an air equalizing plate, ventilation holes and air guide vanes; the first connecting pipe is connected to the connecting pipe, and the first connecting pipe is provided with an electric valve; the first connecting pipe is connected to the jet chamber, and the jet chamber is opened on the right; the jet chamber is fixedly connected to the air equalizing plate; the air equalizing plate has a number of ventilation holes; the jet chamber is connected to at least two obliquely arranged air guide vanes, and each air guide vane is connected to the air equalizing plate.

[0009] More preferably, there are three air guide vanes, and all the air guide vanes are arranged in equidistant straight lines; among them, each air guide vane includes a fixed vane and a rotating vane; the air equalizing plate is fixedly connected with three fixed vanes, the jet chamber is connected with three rotating vanes, and the vertical axis of each rotating vane penetrates through the upper part of the jet chamber, and each rotating vane contacts the fixed vane at the corresponding position.

[0010] More preferably, it further includes a first diversion vane and a second diversion vane; a first diversion vane is arranged on the air guide vane in the middle of each jet chamber; a second diversion vane is arranged on the air guide vane behind each jet chamber.

[0011] More preferably, the number of ventilation holes arranged in the front part of the air equalizing plate is greater than the number of ventilation holes arranged in the rear part of the air equalizing plate.

[0012] More preferably, it further includes an adsorption component, and each exhaust gas control system is provided with an adsorption component; among them, the adsorption component on the left includes a hollow chamber, a second connecting pipe, a hollow strip and a filter plate; the jet chamber is fixedly connected with the hollow chamber, and the hollow chamber is communicated with the jet chamber; the hollow chamber is communicated with the jet chamber through the second connecting pipe; an electric control switch valve is arranged on the second connecting pipe; the hollow chamber is fixedly connected with the hollow strip; the hollow strip is fixedly connected with the filter plate.

[0013] More preferably, each filter plate is provided with a plurality of convex parts, and the number and position of the convex parts correspond to the number and position of the ventilation holes; the hollow strip is telescopically arranged.

[0014] More preferably, the hollow chamber includes a connecting box and an opening and closing plate; the connecting box is fixedly connected with the jet chamber; the connecting box is rotatably connected with the opening and closing plate through a hinge, and the opening and closing plate is connected with the connecting box through a buckle.

[0015] More preferably, it further includes a flexible strip, a filter sheet, a winding component and a pulling component; each exhaust gas control system is provided with two winding components distributed front and back; each exhaust gas control system is provided with a pulling component, and each pulling component is connected with the winding component at the corresponding position, and the two winding components distributed front and back are jointly connected with a flexible strip; each flexible strip is fixedly connected with a filter sheet, and each filter sheet is wound around the winding component at the corresponding position; among them, the winding component in the left rear includes a fixed box, a reel and a torsion member; the jet chamber is fixedly connected with the fixed box; the fixed box is connected with two torsion members arranged up and down, and the upper torsion member penetrates through the top of the fixed box.

[0016] More preferably, the pulling component on the left includes a pull rope, a moving block, a third connecting pipe and a scraping strip; the second connecting pipe is communicated with the third connecting pipe; the inner wall of the third connecting pipe is slidably connected with the moving block, and the moving block is in interference fit with the inner wall of the third connecting pipe; the moving block is fixedly connected with the pull rope, and the pull rope is fixedly connected with the torsion member at the corresponding position.

[0017] The beneficial effects are as follows: Through the operation of the waste gas control system of the present invention, the problem in the prior art that harmful gases overflowing from outside the bin cannot be effectively and quickly absorbed, resulting in the overflow of harmful gases inside the bin and affecting the surrounding environment is avoided;

[0018] Through the setting of the air guiding pieces, the concentration degree of the high-pressure area is reduced, and the dispersion amount is lower; moreover, the problem that after the collision of two oblique airflows, an overflow air mass will still be generated and affect the external environment is avoided;

[0019] Through the setting of the air outlet, the problem in the prior art that harmful gases easily flow out from the gaps between the exemplary switch door and the exemplary facilities is avoided;

[0020] Through the setting of the adsorption component, the pipe fittings of this device are avoided from being corroded by harmful gases and impurities, and the working burden of the external purification equipment can be greatly reduced, and the air purification efficiency can be improved;

[0021] Through the cooperation of the hollow strips and the convex parts, the problem that impurities adhere to the ventilation holes, causing blockage to them, resulting in turbulent flow when the first air flow and the second air flow are generated, and weakening the air absorption and purification ability of this device is avoided;

[0022] Through the cooperation of the filter sheet, the winding component and the pulling component, the problem in the prior art that setting a partition net will disrupt the first air flow and the second air flow, making them unable to work properly, and not setting a partition net will make the surface of the air distribution plate caked and uneven, still affecting the first air flow and the second air flow is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the first structural schematic diagram disclosed for the harmful gas escape prevention device of the present invention;

[0024] Figure 2 It is the first usage structural schematic diagram disclosed for the harmful gas escape prevention device of the present invention;

[0025] Figure 3 It is the second usage structural schematic diagram disclosed for the harmful gas escape prevention device of the present invention;

[0026] Figure 4 It is the second structural schematic diagram disclosed for the harmful gas escape prevention device of the present invention;

[0027] Figure 5 It is the first structural schematic diagram of the waste gas control system disclosed for the harmful gas escape prevention device of the present invention;

[0028] Figure 6 It is the second structural schematic diagram of the waste gas control system disclosed for the harmful gas escape prevention device of the present invention;

[0029] Figure 7Cross-sectional view of the exhaust gas control system structure disclosed for the harmful gas escape prevention device of the present invention;

[0030] Figure 8 Exploded view of the exhaust gas control system structure disclosed for the harmful gas escape prevention device of the present invention;

[0031] Figure 9 Enlarged view of Area A disclosed for the harmful gas escape prevention device of the present invention;

[0032] Figure 10 Expanded view of the structure of the first adsorption component disclosed for the harmful gas escape prevention device of the present invention;

[0033] Figure 11 Expanded view of the structure of the second adsorption component disclosed for the harmful gas escape prevention device of the present invention;

[0034] Figure 12 Schematic diagram of the structure of the winding component and the pulling component disclosed for the harmful gas escape prevention device of the present invention;

[0035] Figure 13 Enlarged view of Area B disclosed for the harmful gas escape prevention device of the present invention;

[0036] Figure 14 Expanded view of the structure of the winding component and the pulling component disclosed for the harmful gas escape prevention device of the present invention;

[0037] Figure 15 Partial schematic diagram of the structure of the winding component and the pulling component disclosed for the harmful gas escape prevention device of the present invention;

[0038] Figure 16 Schematic diagram of the operation of the oblique airflow disclosed for the harmful gas escape prevention device of the present invention;

[0039] Figure 17 Schematic diagram of the operation of the first airflow and the second airflow disclosed for the harmful gas escape prevention device of the present invention.

[0040] In the attached drawing reference numerals: 1 - pump unit, 2 - connecting pipe, 3 - waste gas control system, 4 - slide rail, 5 - slider, 11 - air inlet, 12 - air outlet, 101 - first connecting pipe, 102 - jet chamber, 103 - air distribution plate, 1031 - ventilation hole, 104 - air guiding vane, 1041 - fixing piece, 1042 - rotating piece, 1051 - first air guiding vane, 1052 - second air guiding vane, 201 - hollow chamber, 202 - second connecting pipe, 203 - hollow strip, 204 - filter plate, 205 - convex part, 2011 - connecting box, 2012 - opening and closing plate, 111 - fixing shell, 112 - driving motor, 113 - transmission part, 301 - fixing box, 302 - reel, 303 - torsion part, 304 - flexible strip, 305 - filter sheet, 306 - pull rope, 307 - moving block, 308 - third connecting pipe, 001 - example facility, 002 - example switch door, 003 - example gas extraction device, 004 - first air flow, 0041 - diffusion air mass, 005 - second air flow, 0051 - flow direction, 006 - oblique air flow. Detailed implementation manners

[0041] The embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0042] Embodiment 1

[0043] A device for preventing harmful gas from escaping, such as Figure 1-17 shown, includes a pump unit 1, a connecting pipe 2 and a waste gas control system 3; the pump unit 1 is connected to the connecting pipe 2 through a connecting pipe; both ends of the connecting pipe 2 are each connected to at least one waste gas control system 3, and two waste gas control systems 3 in the same horizontal position view from top to bottom work towards each other;

[0044] It also includes a slide rail 4, a slider 5, an air inlet 11, an air outlet 12 and a switch monitoring component; the connecting pipe 2 is connected to at least two sliders 5; all the sliders 5 are commonly connected to a slide rail 4; the pump unit 1 is provided with an air inlet 11 and an air outlet 12; the connecting pipe 2 is telescopically arranged.

[0045] The waste gas control system 3 on the left includes a first connecting pipe 101, a jet chamber 102, an air distribution plate 103, ventilation holes 1031 and air guiding vanes 104; the first connecting pipe 101 is communicated with the connecting pipe 2, and the first connecting pipe 101 is provided with an electric valve; the first connecting pipe 101 is communicated with the jet chamber 102, and the jet chamber 102 is provided with an opening on the right; the jet chamber 102 is fixedly connected to the air distribution plate 103; the air distribution plate 103 is provided with a number of ventilation holes 1031; the jet chamber 102 is connected to at least two obliquely arranged air guiding vanes 104, and each air guiding vane 104 is connected to the air distribution plate 103.

[0046] Before the device works, first install the pump 1 outside the sample facility 001, install the connecting pipe 2 and the waste gas control system 3 inside the sample facility 001, and the connecting pipe 2 and the waste gas control system 3 are arranged around the sample switch door 002. Then, communicatively connect the pump 1 with the external terminal device, install the switch monitoring component (such as a photoelectric coupling device) at the preset position of the sample facility 001, and communicatively connect the switch monitoring component with the external terminal device;

[0047] Since in the prior art, when the sample switch door 002 is in the open state, a negative pressure environment cannot be formed inside the sample facility 001, and the prior art cannot effectively and quickly absorb the harmful gases overflowing from the sample switch door 002 through the sample gas extraction device 003, resulting in the overflow of harmful gases inside the bin,

[0048] Therefore, the device is provided with a waste gas control system 3. When the switch monitoring component detects that the sample switch door 002 is opened, the external terminal device controls the pump 1 to start working and inhale air from the air inlet 11. The pump 1 conducts the air into the connecting pipe 2, and the air in the connecting pipe 2 enters the jet bin 102 through the first connecting pipe 101 and is ejected. And the jet bin 102 is provided with an air equalizing plate 103 for evenly ejecting air;

[0049] The air ejected by the two oppositely arranged waste gas control systems 3 forms an air curtain. Under the action of the air curtain, the harmful gases inside the sample facility 001 are blocked and cannot escape to the outside,

[0050] After that, when the sample switch door 002 is closed, the pump 1 continues to work for seconds to prevent the overflow of harmful gases caused by the working delay of the switch monitoring component; in this way, the problem that the prior art cannot effectively and quickly absorb the harmful gases overflowing from the outside of the bin, resulting in the overflow of harmful gases inside the bin and affecting the surrounding environment is avoided;

[0051] Furthermore, since the width of the sample switch door 002 is different in actual work, it is necessary to carry out the fixing work according to the actual needs when installing the device. However, continuously adjusting the position of the waste gas control system 3 for fixing in actual work makes the installation work of the staff very cumbersome every time,

[0052] Therefore, the device is also provided with a slide rail 4 and a slider 5. When installing the device, fixedly connect the slide rail 4 with the preset of the sample facility 001. Then, the staff push the slider 5 to adjust the waste gas control system 3 at the corresponding position. After the adjustment is completed, twist the fixing buckle of the slider 5 to fix the slider 5. In this way, the waste gas control system 3 is also fixed. When the position of the waste gas control system 3 needs to be adjusted later, loosen the fixing buckle of the slider 5 and then adjust the slider 5. In this way, the installation work of the device is made more convenient;

[0053] Further, when the exhaust gas control system 3 ejects air to form an air curtain, due to the high flow rate of the ejected air, it will inevitably mix with the harmful air in the example facility 001.

[0054] At this time, if the air ejected by each exhaust gas control system 3 is in a straight line, the two airflows will collide head-on, and the flow rate in the contact area will drop sharply. According to Bernoulli's principle, the decrease in air flow rate will cause a significant increase in local pressure. The high-pressure area forces the air flow to disperse around, forming a more obvious air diffusion. In this way, most of the harmful gases will still escape outdoors.

[0055] Therefore, each exhaust gas control system 3 of this device is provided with at least two guide vanes 104 arranged obliquely. When the air is ejected from the jet chamber 102, under the action of the guide vanes 104 at the corresponding positions, the air ejected from each jet chamber 102 is an oblique airflow 006 ejected obliquely. In this way, when the oblique airflows 006 blow against each other, the oblique airflows 006 meet at a certain angle, and part of the momentum is converted into lateral movement instead of completely perpendicular impact. At this time, the air deflects along the contact surface or forms a vortex, reducing the concentration of the high-pressure area and resulting in a lower escape amount.

[0056] Further, in order to ensure that the harmful gases in the example facility 001 can be evenly and effectively absorbed, the example gas extraction devices 003 in the prior art are all as Figure 2 shown, and are set at the middle position on the top of the example facility 001. Although such a setting can make the harmful gas absorption work more uniform, the harmful gases are also more likely to flow out from the gap between the example switch door 002 and the example facility 001.

[0057] Therefore, the pump 1 is provided with an air outlet 12. Before the device works, the air outlet 12 is first connected to an external purification device. When the example switch door 002 is closed and the example gas extraction device 003 is working to absorb harmful gases, the air inlet 11 is closed, and the pump 1 starts to work in reverse. The harmful air near the example switch door 002 is sucked into the external purification device through the exhaust gas control system 3. In this way, this device can assist the example gas extraction device 003 to work, avoiding the problem that the harmful gases in the prior art are likely to flow out from the gap between the example switch door 002 and the example facility 001.

[0058] Embodiment 2

[0059] On the basis of Embodiment 1, as Figures 5-9 shown,

[0060] There are three guide vanes 104, and all the guide vanes 104 are arranged equidistantly in a straight line.

[0061] Among them, each air guide vane 104 includes a fixed vane 1041 and a rotating vane 1042; the air equalizing plate 103 is fixedly connected with three fixed vanes 1041, the jet chamber 102 is connected with three rotating vanes 1042, and the vertical axis of each rotating vane 1042 penetrates through the upper part of the jet chamber 102, and each rotating vane 1042 contacts the corresponding fixed vane 1041.

[0062] It further includes a first flow guiding vane 1051 and a second flow guiding vane 1052; the air guide vane 104 in the middle position of each jet chamber 102 is provided with a first flow guiding vane 1051; the air guide vane 104 behind each jet chamber 102 is provided with a second flow guiding vane 1052.

[0063] The number of ventilation holes 1031 provided in the front part of the air equalizing plate 103 is greater than the number of ventilation holes 1031 provided in the rear part of the air equalizing plate 103.

[0064] Although the amount of harmful gas dissipated by the oblique airflow 006 in practice will be reduced, but as Figure 16 shown, after the two oblique airflows 006 collide, an overflow air mass will still be generated.

[0065] Therefore, each exhaust gas control system 3 is provided with three air guide vanes 104, and the three air guide vanes 104 separate the oblique airflow 006 ejected from each exhaust gas control system 3 to form a first airflow 004 and a second airflow 005.

[0066] Since the first airflow 004 is closer to the harmful air in the example facility 001, the first airflow 004 will absorb the harmful air due to the pressure difference. The two first airflows 004 will collide at the intersection to dissipate the harmful air, and the first airflow 004 will also dissipate the harmful air throughout the ejected airflow.

[0067] On the one hand, the second airflow 005 forms a barrier to the first airflow 004, so that the dissipated harmful air will not flow to the external space again; on the other hand, since the first airflow 004 is ejected from the front part of the air equalizing plate 103, and the second airflow 005 is ejected from the rear part of the air equalizing plate 103, the flow rate of the first airflow 004 is relatively faster than that of the second airflow 005. At this time, the pressure of the first airflow 004 is lower than that of the second airflow 005. At this time, the air in the second airflow 005 will flow towards the first airflow 004 along the flow direction 0051. At this time, the harmful gas dissipated by the first airflow 004 will return to the first airflow 004 again. In this way, the problem that an overflow air mass will still be generated after the two oblique airflows 006 collide and affect the external environment is avoided.

[0068] Further, a first deflector 1051 is provided on the air guide vane 104 in the middle of each jet chamber 102; a second deflector 1052 is provided on the air guide vane 104 behind each jet chamber 102, so that each second air flow 005 is farther from the first air flow 004 at the corresponding position, so that the second air flow 005 and the first air flow 004 will not interfere with each other during operation.

[0069] Embodiment 3

[0070] Based on Embodiment 2, as Figures 6-11 shown,

[0071] It further includes an adsorption assembly, and each exhaust gas control system 3 is provided with an adsorption assembly;

[0072] Among them, the adsorption assembly on the left includes a hollow chamber 201, a second connecting pipe 202, a hollow strip 203 and a filter plate 204; the jet chamber 102 is fixedly connected to the hollow chamber 201, and the hollow chamber 201 is communicated with the jet chamber 102; the hollow chamber 201 is communicated with the jet chamber 102 through the second connecting pipe 202; an electric control switch valve is provided on the second connecting pipe 202; the hollow chamber 201 is fixedly connected to the hollow strip 203; the hollow strip 203 is fixedly connected to the filter plate 204.

[0073] Each filter plate 204 is provided with a plurality of convex parts 205, and the number and position of the convex parts 205 correspond to the number and position of the ventilation holes 1031; the hollow strip 203 is telescopically arranged.

[0074] The hollow chamber 201 includes a connection box 2011 and an opening and closing plate 2012; the connection box 2011 is fixedly connected to the jet chamber 102; the connection box 2011 is rotatably connected to the opening and closing plate 2012 through a hinge, and the opening and closing plate 2012 is connected to the connection box 2011 through a buckle.

[0075] During the actual operation of this device, since some items will have impurities such as dust and water vapor (such as powdered chemical raw materials and garbage in a garbage station) when the sample facility 001 stores items, this will cause the exhaust gas control system 3 to passively absorb a lot of dust when inhaling harmful air, resulting in blockages in the internal parts such as the connecting pipe 2 and the first connecting pipe 101 of this device, and most of these impurities are corrosive, which will further damage the stability of this device.

[0076] Therefore, the device is provided with an adsorption component. When the pump 1 starts to work in the reverse direction and inhales harmful air through the exhaust gas control system 3, the electric valve of the first connecting pipe 101 closes, and the electric control switch valve of the second connecting pipe 202 opens. At this time, the harmful gas enters the hollow chamber 201 from the filter plate 204. During this process, the harmful gas and impurities in the air are filtered by the filter plate 204 to form preliminarily filtered air. The preliminarily filtered air enters the external purification equipment through the hollow chamber 201. In this way, not only can the pipe fittings of the device be avoided from being corroded by harmful gas and impurities, but also the working burden of the external purification equipment can be greatly reduced, and the air purification efficiency can be improved.

[0077] Further, a plurality of convex portions 205 are provided on the filter plate 204. The convex portions 205 increase the contact area between the filter plate 204 and harmful air and impurities, and improve the filtering ability of the filter plate 204.

[0078] Further, in actual work, impurities will also adhere to the air distribution plate 103 and block the ventilation holes 1031. This will cause turbulence in the generation of the first air flow 004 and the second air flow 005, and also weaken the air absorption and purification ability of the device.

[0079] Therefore, the device is also provided with a hollow strip 203. The device periodically drives the pump 1 to work to transport external gas into the hollow chamber 201. The air enters the hollow strip 203 through the hollow chamber 201. At this time, since the hollow strip 203 is blocked by the filter plate 204, the air squeezes the hollow strip 203 to expand like 11. The hollow strip 203 pushes the filter plate 204 to move until the filter plate 204 contacts the air distribution plate 103 at the corresponding position. At this time, the convex portions 205 provided on the filter plate 204 will pass through the ventilation holes 1031 at the corresponding positions, and squeeze out the impurities attached to the ventilation holes 1031, so that the ventilation holes 1031 are dredged. In this way, the problem that impurities adhere to the ventilation holes 1031, cause blockage, resulting in turbulence in the generation of the first air flow 004 and the second air flow 005, and weakening the air absorption and purification ability of the device is avoided.

[0080] Further, since the filter plate 204 needs to filter harmful air and impurities, it needs to be cleaned regularly. For the convenience of cleaning work, the hollow chamber 201 includes a connection box 2011 and an opening and closing plate 2012. When the filter plate 204 needs to be cleaned, the staff pries open the buckle between the opening and closing plate 2012 and the connection box 2011, and then opens the opening and closing plate 2012 as Figure 10 shown, so that the filter plate 204 in the hollow chamber 201 can be quickly cleaned, improving the work convenience of the staff.

[0081] Embodiment 4

[0082] On the basis of Embodiment 3, as Figures 12-15 shown,

[0083] It further includes a flexible strip 304, a filter sheet 305, a winding assembly and a pulling assembly; each exhaust gas control system 3 is provided with two winding assemblies distributed front and back; each exhaust gas control system 3 is provided with a pulling assembly, and each pulling assembly is connected to the winding assembly at the corresponding position. The two winding assemblies distributed front and back are commonly connected to a flexible strip 304; each flexible strip 304 is fixedly connected to a filter sheet 305, and each filter sheet 305 is wound around the winding assembly at the corresponding position;

[0084] Among them, the winding assembly at the left rear includes a fixed box 301, a reel 302 and a torsion member 303; the jet chamber 102 is fixedly connected to the fixed box 301; the fixed box 301 is connected to two torsion members 303 arranged up and down, and the upper torsion member 303 penetrates the top of the fixed box 301.

[0085] The pulling assembly on the left includes a pull rope 306, a moving block 307, a third connecting pipe 308 and a scraping strip; the second connecting pipe 202 communicates with the third connecting pipe 308; the inner wall of the third connecting pipe 308 is slidably connected with the moving block 307, and the moving block 307 is in interference fit with the inner wall of the third connecting pipe 308; the moving block 307 is fixedly connected to the pull rope 306, and the pull rope 306 is fixedly connected to the torsion member 303 at the corresponding position.

[0086] In order to filter large particle impurities in the air and further ensure the operation of the air distribution plate 103, in the prior art, a layer of mesh is often provided in front of the air distribution plate 103 so that large particle impurities can be preliminarily filtered. However, the exhaust gas control system 3 of this device also needs to spray air to form the first air flow 004 and the second air flow 005. The existence of the mesh will affect the formation of the first air flow 004 and the second air flow 005, and then disrupt the first air flow 004 and the second air flow 005, making them unable to work properly. However, if the mesh is not provided, large particle impurities will accumulate on the surface of the air distribution plate 103 to form lumps, making the surface of the air distribution plate 103 uneven. In this way, even if the ventilation holes 1031 are regularly dredged by the convex portions 205, the lumps attached around the ventilation holes 1031 will still affect the first air flow 004 and the second air flow 005;

[0087] Therefore, this device is also provided with a filter sheet 305, a winding assembly and a pulling assembly. The initial state of the filter sheet 305 is as Figure 15As shown, it is fixed on a reel 302 in a wound state. When the pump 1 starts to work in reverse and inhales harmful air and impurities through the exhaust gas control system 3, since the inside of the hollow chamber 201 is in a negative pressure state at this time, and the third connecting pipe 308 is communicated with the hollow chamber 201 through the second connecting pipe 202, the adsorption force generated by the negative pressure acts in the third connecting pipe 308 at this time. At this time, the moving block 307 which is slidably connected and has an interference fit in the third connecting pipe 308 moves under the action of the negative pressure adsorption force, from Figure 15 state to Figure 14 state,

[0088] At this time, the moving block 307 stretches the connected pull rope 306, and the stretched pull rope 306 drives the connected torsion member 303 to rotate, and the torsion member 303 generates a reset torsion force. At this time, the torsion member 303 drives the corresponding connected reel 302 to rotate. When the reel 302 rotates, it winds the flexible strip 304. When the flexible strip 304 is wound, it drives the connected filter sheet 305 to unfold, showing Figure 14 unfolding state, and at this time, another reel 302 is driven to rotate by the flexible strip 304, and at this time, another reel 302 drives another torsion member 303 to rotate and generates a reset torsion force,

[0089] Thus, when the pump 1 starts to work in reverse and inhales harmful air and impurities through the exhaust gas control system 3, the filter sheet 305 can unfold to block large-particle impurities. When the exhaust gas control system 3 ejects air or does not work, the air will pass through the filter plate 204 and then enter the hollow chamber 201. At this time, the moving block 307 will be affected by the reset torsion force of the torsion member 303 connected by the pull rope 306 and reset. At the same time, another torsion member 303 also releases the reset torsion force to pull the flexible strip 304 and the filter sheet 305 to reset,

[0090] In this way, it avoids the problem that in the prior art, setting a partition net will disrupt the first air flow 004 and the second air flow 005, making them unable to work properly, and not setting a partition net will make the surface of the air distribution plate 103 caked and uneven, still affecting the first air flow 004 and the second air flow 005.

[0091] The above are only examples of the present invention and are not used to limit the present invention. All equivalent replacements made within the principle of the present invention shall be included in the protection scope of the present invention. The content not elaborated in detail in the present invention belongs to the known prior art of those skilled in the art.

Claims

1. A harmful gas escape prevention device, comprising a pump (1), a connecting pipe (2) and an exhaust gas control system (3); the pump (1) is connected to the connecting pipe (2) through a connecting pipe; both ends of the connecting pipe (2) are each connected to at least one exhaust gas control system (3), and two exhaust gas control systems (3) at the same horizontal position from the top-down view work towards each other; characterized in that: It further includes a slide rail (4), a slider (5), an air inlet (11), an air outlet (12) and a switch monitoring component; the connecting pipe (2) is connected to at least two sliders (5); all the sliders (5) are jointly connected to a slide rail (4); the pump (1) is provided with an air inlet (11) and an air outlet (12); the connecting pipe (2) is telescopically arranged.

2. The harmful gas escape prevention device according to claim 1, wherein: The waste gas control system (3) on the left includes a first connecting pipe (101), a jet chamber (102), an air distribution plate (103), ventilation holes (1031) and air guiding vanes (104); the first connecting pipe (101) is communicated with the connecting pipe (2), and the first connecting pipe (101) is provided with an electric valve; the first connecting pipe (101) is communicated with a jet chamber (102), and the jet chamber (102) is open at the right part; the jet chamber (102) is fixedly connected with an air distribution plate (103); the air distribution plate (103) is provided with a plurality of ventilation holes (1031); the jet chamber (102) is connected with at least two obliquely arranged air guiding vanes (104), and each air guiding vane (104) is connected with the air distribution plate (103).

3. The harmful gas escape prevention device according to claim 2, characterized in that: There are three air guiding vanes (104), and all the air guiding vanes (104) are arranged at equal intervals in a straight line; among them, each air guiding vane (104) includes a fixed plate (1041) and a rotating plate (1042); the air distribution plate (103) is fixedly connected with three fixed plates (1041), the jet chamber (102) is connected with three rotating plates (1042), and the vertical axis of each rotating plate (1042) penetrates through the upper part of the jet chamber (102), and each rotating plate (1042) contacts the corresponding fixed plate (1041).

4. The harmful gas escape prevention device according to claim 3, characterized in that: It further includes a first air guiding vane (1051) and a second air guiding vane (1052); the air guiding vane (104) in the middle position of each jet chamber (102) is provided with a first air guiding vane (1051); the air guiding vane (104) behind each jet chamber (102) is provided with a second air guiding vane (1052).

5. The harmful gas escape prevention device according to claim 4, wherein: The number of ventilation holes (1031) arranged in the front part of the air distribution plate (103) is greater than the number of ventilation holes (1031) arranged in the rear part of the air distribution plate (103).

6. The harmful gas escape prevention device according to claim 5, wherein: It further includes an adsorption component, and each waste gas control system (3) is provided with an adsorption component; among them, the adsorption component on the left includes a hollow chamber (201), a second connecting pipe (202), a hollow strip (203) and a filter plate (204); the jet chamber (102) is fixedly connected with a hollow chamber (201), and the hollow chamber (201) is communicated with the jet chamber (102); the hollow chamber (201) is communicated with the jet chamber (102) through a second connecting pipe (202); the second connecting pipe (202) is provided with an electric control switch valve; the hollow chamber (201) is fixedly connected with a hollow strip (203); the hollow strip (203) is fixedly connected with a filter plate (204).

7. The harmful gas leakage prevention device according to claim 6, wherein: Each filter plate (204) is provided with a plurality of convex parts (205), and the number and position of the convex parts (205) correspond to the number and position of the ventilation holes (1031); the hollow strip (203) is telescopically arranged.

8. The harmful gas escape prevention device according to claim 7, wherein: The hollow bin (201) includes a connection box (2011) and an opening / closing plate (2012); the connection box (2011) is fixedly connected to the jet bin (102); the connection box (2011) is rotatably connected to the opening / closing plate (2012) through a hinge, and the opening / closing plate (2012) is connected to the connection box (2011) through a buckle.

9. The harmful gas escape prevention device according to claim 8, wherein: It further includes a flexible strip (304), a filter sheet (305), a winding assembly and a pulling assembly; each exhaust gas control system (3) is provided with two winding assemblies distributed front and back; each exhaust gas control system (3) is provided with a pulling assembly, and each pulling assembly is connected to the winding assembly at the corresponding position. The two winding assemblies distributed front and back are commonly connected to a flexible strip (304); each flexible strip (304) is fixedly connected to a filter sheet (305), and each filter sheet (305) is wound around the winding assembly at the corresponding position; among them, the winding assembly in the left rear includes a fixed box (301), a reel (302) and a torsion member (303); the jet bin (102) is fixedly connected to the fixed box (301); the fixed box (301) is connected to two torsion members (303) arranged up and down, and the upper torsion member (303) penetrates through the top of the fixed box (301).

10. The harmful gas escape prevention device according to claim 9, characterized in that: The pulling assembly on the left includes a pull rope (306), a moving block (307), a third connecting pipe (308) and a scraping strip; the second connecting pipe (202) communicates with the third connecting pipe (308); the inner wall of the third connecting pipe (308) is slidably connected to the moving block (307), and the moving block (307) is in interference fit with the inner wall of the third connecting pipe (308); the moving block (307) is fixedly connected to the pull rope (306), and the pull rope (306) is fixedly connected to the torsion member (303) at the corresponding position.

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