Device for preventing harmful gas from escaping

Abstract

The present application relates to waste gas absorption equipment technical field, especially to prevent harmful gas device that escapes, including pump machine, communicating pipe and waste gas control system etc.;Pump machine is communicated with communicating pipe through connecting pipe.;The two ends of communicating pipe are connected with at least one waste gas control system, and the two waste gas control systems in the same horizontal position from the top to the downward view work oppositely. The present application avoids the problem that the harmful gas overflowed from the warehouse door cannot be effectively and quickly absorbed by the prior art, causing the harmful gas in the warehouse to overflow and affecting the surrounding environment. Through the setting of the air deflector, the concentration of the high pressure area is reduced, and the escape amount is lower. And the problem that after the collision of the two oblique airflows, the external environment is still affected by the overflowed gas mass is avoided.

Description

Technical Field

[0001] This invention relates to the field of waste gas absorption equipment technology, and in particular to a device for preventing the escape of harmful gases. Background Technology

[0002] Existing technology involves placing items that easily release harmful gases in relatively sealed, enclosed chambers (such as garbage dumps and chemical storage warehouses) and installing purification equipment to extract the harmful gases that evaporate from the enclosed chambers.

[0003] Harmful gases are drawn to the purification equipment through the duct, and then undergo processes such as plasma purification, UV photolysis and activated carbon adsorption before being discharged.

[0004] However, the premise for the efficient operation of existing purification technology is that the sealed chamber must always maintain a "slight negative pressure environment" so that the harmful gases in the sealed chamber will not escape through the gaps in the sealed chamber connection and will all be drawn into the equipment for treatment.

[0005] However, in actual use, it is often necessary to open the door of the sealed chamber to take out the items inside. At this time, the door is in the open state, and a negative pressure environment cannot be formed inside the sealed chamber. Existing technology cannot effectively and quickly absorb the harmful gases that overflow from the door, causing harmful gases to leak out of the chamber and affect the surrounding environment. Summary of the Invention

[0006] In order to overcome the shortcomings of existing technologies that cannot effectively and quickly absorb harmful gases overflowing from the warehouse door, causing harmful gases to escape from the warehouse, this invention provides a device to prevent the escape of harmful gases.

[0007] The technical solution of the present invention is: a device for preventing the escape of harmful gases, comprising a pump, a connecting pipe, and an exhaust gas control system; the pump is connected to the connecting pipe via a connecting pipe; at least one exhaust gas control system is connected to each end of the connecting pipe, and the two exhaust gas control systems, which are at the same horizontal position from a top-down perspective, operate in opposite directions; it also includes a slide rail, sliders, an air inlet, an air outlet, and a switch monitoring component; the connecting pipe is connected to at least two sliders; all sliders are connected to a common slide rail; the pump is provided with an air inlet and an air outlet; the connecting pipe is retractable.

[0008] More preferably, the exhaust gas control system on the left includes a first connecting pipe, a jet chamber, an air distribution plate, ventilation holes, and air guide vanes; the first connecting pipe is connected to a connecting pipe and is equipped with an electric valve; the first connecting pipe is connected to a jet chamber, which has an opening on the right side; the jet chamber is fixedly connected to an air distribution plate; the air distribution plate has several 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 distribution plate.

[0009] More preferably, the air guide fins are provided in three, and all the air guide fins are provided in equidistant straight lines; wherein each air guide fin comprises a fixed fin and a rotating fin; the air uniformizing plate is fixedly connected with the three fixed fins, and the air injection chamber is connected with the three rotating fins, and each rotating fin penetrates the upper part of the air injection chamber through a vertical shaft, and each rotating fin is in contact with the fixed fin at the corresponding position.

[0010] More preferably, the air guide fins are provided in three, and all the air guide fins are provided in equidistant straight lines; wherein each air guide fin comprises a fixed fin and a rotating fin; the air uniformizing plate is fixedly connected with the three fixed fins, and the air injection chamber is connected with the three rotating fins, and each rotating fin penetrates the upper part of the air injection chamber through a vertical shaft, and each rotating fin is in contact with the fixed fin at the corresponding position.

[0011] More preferably, the air guide fins are provided in three, and all the air guide fins are provided in equidistant straight lines; wherein each air guide fin comprises a fixed fin and a rotating fin; the air uniformizing plate is fixedly connected with the three fixed fins, and the air injection chamber is connected with the three rotating fins, and each rotating fin penetrates the upper part of the air injection chamber through a vertical shaft, and each rotating fin is in contact with the fixed fin at the corresponding position.

[0012] More preferably, the air guide fins are provided in three, and all the air guide fins are provided in equidistant straight lines; wherein each air guide fin comprises a fixed fin and a rotating fin; the air uniformizing plate is fixedly connected with the three fixed fins, and the air injection chamber is connected with the three rotating fins, and each rotating fin penetrates the upper part of the air injection chamber through a vertical shaft, and each rotating fin is in contact with the fixed fin at the corresponding position.

[0013] More preferably, the air guide fins are provided in three, and all the air guide fins are provided in equidistant straight lines; wherein each air guide fin comprises a fixed fin and a rotating fin; the air uniformizing plate is fixedly connected with the three fixed fins, and the air injection chamber is connected with the three rotating fins, and each rotating fin penetrates the upper part of the air injection chamber through a vertical shaft, and each rotating fin is in contact with the fixed fin at the corresponding position.

[0014] More preferably, the air guide fins are provided in three, and all the air guide fins are provided in equidistant straight lines; wherein each air guide fin comprises a fixed fin and a rotating fin; the air uniformizing plate is fixedly connected with the three fixed fins, and the air injection chamber is connected with the three rotating fins, and each rotating fin penetrates the upper part of the air injection chamber through a vertical shaft, and each rotating fin is in contact with the fixed fin at the corresponding position.

[0015] More preferably, the air guide fins are provided in three, and all the air guide fins are provided in equidistant straight lines; wherein each air guide fin comprises a fixed fin and a rotating fin; the air uniformizing plate is fixedly connected with the three fixed fins, and the air injection chamber is connected with the three rotating fins, and each rotating fin penetrates the upper part of the air injection chamber through a vertical shaft, and each rotating fin is in contact with the fixed fin at the corresponding position.

[0016] More preferably, the air guide fins are provided in three, and all the air guide fins are provided in equidistant straight lines; wherein each air guide fin comprises a fixed fin and a rotating fin; the air uniformizing plate is fixedly connected with the three fixed fins, and the air injection chamber is connected with the three rotating fins, and each rotating fin penetrates the upper part of the air injection chamber through a vertical shaft, and each rotating fin is in contact with the fixed fin at the corresponding position.

[0017] The beneficial effect is that the present application avoids the problem that the prior art cannot effectively and quickly absorb harmful gas overflowing from the warehouse door, causing harmful gas to overflow in the warehouse and affecting the surrounding environment, through the operation of the waste gas control system.

[0018] By setting the air guide piece, the concentration of the high pressure area is reduced, and the amount of escape is lower. Moreover, the problem that after the collision of the two oblique airflows, an overflow air mass is still generated to affect the external environment is avoided.

[0019] By setting the air outlet, the problem that harmful gas easily flows out from the gap between the example switch door and the example facility is avoided.

[0020] By setting the adsorption assembly, the problem that the device pipe is corroded by harmful gas and impurities is avoided, and the working burden of the external purification equipment is greatly reduced, and the air purification efficiency is improved.

[0021] By cooperating the hollow strip and the convex part, the problem that impurities adhere to the ventilation hole, causing turbulence of the first airflow and the second airflow when they are generated, and weakening the air absorption and purification capacity of the device is avoided.

[0022] By cooperating the filter piece, the winding assembly and the pulling assembly, the problem that the existing technology sets a screen, which disturbs the first airflow and the second airflow, so that they cannot work normally, and without the screen, the surface of the air uniforming plate becomes uneven, which still affects the first airflow and the second airflow is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The first structure schematic diagram of the harmful gas escape prevention device disclosed by the present application is shown.

[0024] Figure 2 The first use structure schematic diagram of the harmful gas escape prevention device disclosed by the present application is shown.

[0025] Figure 3 The second use structure schematic diagram of the harmful gas escape prevention device disclosed by the present application is shown.

[0026] Figure 4 The second structure schematic diagram of the harmful gas escape prevention device disclosed by the present application is shown.

[0027] Figure 5 The first waste gas control system structure schematic diagram of the harmful gas escape prevention device disclosed by the present application is shown.

[0028] Figure 6 The second waste gas control system structure schematic diagram of the harmful gas escape prevention device disclosed by the present application is shown.

[0029] Figure 7The waste gas control system structure sectional view disclosed by the harmful gas preventing diffusion device of the present application;

[0030] Figure 8 The waste gas control system structure exploded view disclosed by the harmful gas preventing diffusion device of the present application;

[0031] Figure 9 The A area enlarged view disclosed by the harmful gas preventing diffusion device of the present application;

[0032] Figure 10 The first adsorption component structure development view disclosed by the harmful gas preventing diffusion device of the present application;

[0033] Figure 11 The second adsorption component structure development view disclosed by the harmful gas preventing diffusion device of the present application;

[0034] Figure 12 The winding component and pulling component structure schematic view disclosed by the harmful gas preventing diffusion device of the present application;

[0035] Figure 13 The B area enlarged view disclosed by the harmful gas preventing diffusion device of the present application;

[0036] Figure 14 The winding component and pulling component structure development view disclosed by the harmful gas preventing diffusion device of the present application;

[0037] Figure 15 The winding component and pulling component local structure schematic view disclosed by the harmful gas preventing diffusion device of the present application;

[0038] Figure 16 The oblique air flow working schematic view disclosed by the harmful gas preventing diffusion device of the present application;

[0039] Figure 17 The first air flow and second air flow working schematic view disclosed by the harmful gas preventing diffusion device of the present application.

[0040] In the attached diagram, the following are the reference numerals: 1-pump, 2-connecting pipe, 3-exhaust 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 guide vane, 1041-fixed plate, 1042-rotating plate, 1051-first guide vane, 1052-second guide vane, 201-hollow chamber, 202-second connecting pipe, 203-hollow strip, 204-filter plate, 205-protrusion, 2011-connecting... Junction box, 2012-Opening and closing plate, 111-Fixed shell, 112-Drive motor, 113-Transmission component, 301-Fixed box, 302-Roller, 303-Torque component, 304-Flexible strip, 305-Filter sheet, 306-Pull rope, 307-Moving block, 308-Third connecting pipe, 001-Example facility, 002-Example opening and closing door, 003-Example gas extraction device, 004-First airflow, 0041-Diffusing air mass, 005-Second airflow, 0051-Flow direction, 006-Oblique airflow. Detailed Implementation

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

[0042] Example 1

[0043] A device to prevent the escape of harmful gases, such as Figures 1-17 As shown, it includes 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 pipe; at least one exhaust gas control system 3 is connected to each end of the connecting pipe 2, and the two exhaust gas control systems 3, which are at the same horizontal position from a top-down perspective, 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 sliders 5 are 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 retractable.

[0045] The exhaust 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 guide vanes 104. The first connecting pipe 101 is connected to the connecting pipe 2 and is equipped with an electric valve. The first connecting pipe 101 is connected to the jet chamber 102, and the jet chamber 102 is open on the right side. The jet chamber 102 is fixedly connected to the air distribution plate 103. The air distribution plate 103 has several ventilation holes 1031. The jet chamber 102 is connected to at least two obliquely arranged air guide vanes 104, and each air guide vane 104 is connected to the air distribution plate 103.

[0046] Before the device works, first install the pump 1 outside the example facility 001, install the communication pipe 2 and the waste gas control system 3 in the example facility 001, and the communication pipe 2 and the waste gas control system 3 are arranged around the example switch door 002, then the pump 1 is connected with the external terminal equipment, the switch monitoring assembly (such as photoelectric coupling device) is installed in the preset position of the example facility 001, and the switch monitoring assembly is connected with the external terminal equipment;

[0047] Because the prior art cannot form a negative pressure environment in the example facility 001 when the example switch door 002 is in an open state, the prior art cannot effectively and quickly absorb the harmful gas overflowing from the example switch door 002 through the example gas extraction device 003, causing the harmful gas in the warehouse to overflow,

[0048] Therefore, the device is provided with the waste gas control system 3, when the switch monitoring assembly detects that the example switch door 002 is opened, the external terminal equipment controls the pump 1 to start working to suck air from the air inlet 11, the pump 1 guides the air into the communication pipe 2, the air in the communication pipe 2 enters the air jet chamber 102 through the first connecting pipe 101 and is sprayed out, and the air jet chamber 102 is provided with the air uniform plate 103 for uniformly spraying air;

[0049] The air sprayed by the two opposite waste gas control systems 3 forms an air curtain, and the harmful gas in the example facility 001 is blocked and cannot escape to the outside under the action of the air curtain,

[0050] After the example switch door 002 is closed, the pump 1 continues to work for a few seconds to prevent the harmful gas from overflowing due to the working delay of the switch monitoring assembly; in this way, the problem that the prior art cannot effectively and quickly absorb the harmful gas overflowing from the warehouse door, causing the harmful gas in the warehouse to overflow and affecting the surrounding environment is avoided;

[0051] Further, because the width of the example switch door 002 is different in actual work, the device needs to be fixed according to actual needs during installation, but the position of the waste gas control system 3 needs to be adjusted constantly during actual work, so that the installation work of the staff is very tedious each time,

[0052] Therefore, the device is also provided with the slide rail 4 and the sliding block 5, during installation, the slide rail 4 is fixedly connected with the example facility 001, then the staff pushes the sliding block 5 to adjust the position of the waste gas control system 3, after adjustment, the fixing buckle of the sliding block 5 is twisted to fix the sliding block 5, so that the waste gas control system 3 is fixed, then the fixing buckle of the sliding block 5 is loosened when the position of the waste gas control system 3 needs to be adjusted, and the sliding block 5 is adjusted, so that the installation work of the device is more convenient;

[0053] Further, when the air exhaust control system 3 sprays air to form a wind curtain, the air sprayed by the air exhaust control system 3 inevitably mixes with the harmful air in the example facility 001 due to the high flow rate,

[0054] At this time, if the air sprayed by each air exhaust control system 3 is in a straight line, the two air flows collide head-on, and the flow rate in the contact area sharply decreases. According to Bernoulli's principle, the decrease in air flow rate leads to a significant increase in local pressure. The high-pressure area forces the air flow to escape in all directions, forming more obvious air diffusion. Thus, most of the harmful gas still diffuses outside the room,

[0055] Therefore, each air exhaust control system 3 of the device is provided with at least two obliquely arranged air guide vanes 104. When the air is sprayed from the air spray chamber 102, the air sprayed by each air spray chamber 102 is obliquely sprayed as an oblique air flow 006 under the action of the air guide vanes 104 at the corresponding positions. Thus, when the oblique air flows 006 blow, the oblique air flows 006 meet at a certain angle. Part of the momentum is converted into transverse motion instead of completely vertical impact. At this time, the air is deflected along the contact surface or forms a vortex, reducing the concentration of the high-pressure area and the diffusion amount.

[0056] Further, in order to ensure that the harmful gas in the example facility 001 can be uniformly and effectively absorbed, the existing example gas extraction device 003 is arranged at the middle position of the top of the example facility 001 as shown in Figure 2 Although this arrangement can make the harmful gas absorption work more uniform, the harmful gas is 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 connected with an external purification equipment. When the example switch door 002 is closed and the example gas extraction device 003 performs harmful gas absorption work, 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 equipment through the air exhaust control system 3. Thus, the device can assist the example gas extraction device 003 to work, avoiding the problem that the harmful gas in the prior art easily flows out from the gap between the example switch door 002 and the example facility 001.

[0058] Embodiment 2

[0059] Based on embodiment 1, as shown in Figures 5-9

[0060] The air guide vanes 104 are arranged in a straight line at equal intervals.

[0061] ​Each of the air guide fins 104 comprises a fixed fin 1041 and a rotating fin 1042; the uniform air plate 103 is fixedly connected with three fixed fins 1041, and the air injection chamber 102 is connected with three rotating fins 1042, and each rotating fin 1042 penetrates the upper part of the air injection chamber 102 in a vertical shaft, and each rotating fin 1042 is in contact with the fixed fin 1041 at the corresponding position.

[0062] Further comprising a first guide fin 1051 and a second guide fin 1052; the air guide fin 104 at the middle of each air injection chamber 102 is provided with the first guide fin 1051; the air guide fin 104 at the rear of each air injection chamber 102 is provided with the second guide fin 1052.

[0063] The number of the front air holes 1031 of the uniform air plate 103 is greater than the number of the rear air holes 1031 of the uniform air plate 103.

[0064] Although the amount of harmful gas dispersed by the oblique airflow 006 is reduced in practice, as shown in FIG. 6, after the collision of the two oblique airflows 006, an overflow gas group is still generated, Figure 16

[0065] Therefore, each exhaust gas control system 3 is provided with three air guide fins 104, which separate the oblique airflow 006 injected by each exhaust gas control system 3, forming 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 harmful air due to the pressure difference, and the two first airflows 004 will collide at the intersection to disperse harmful air, and the first airflow 004 will also disperse harmful air along the entire airflow,

[0067] On the one hand, the second airflow 005 forms a barrier to the first airflow 004, so that the dispersed harmful air will not flow to the external space; on the other hand, since the first airflow 004 is injected from the front of the uniform air plate 103, and the second airflow 005 is injected from the rear of the uniform air 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 along the flow direction 0051 towards the first airflow 004, at this time, the harmful gas dispersed by the first airflow 004 will return to the first airflow 004, thus avoiding the problem that after the collision of the two oblique airflows 006, an overflow gas group is still generated to affect the external environment;

[0068] ​Further, the middle air guide sheet 104 in each air jet chamber 102 is provided with a first air guide sheet 1051; the air guide sheet 104 at the back of each air jet chamber 102 is provided with a second air guide sheet 1052, so that each second air flow 005 is farther away from the corresponding position of the first air flow 004, so that the second air flow 005 and the first air flow 004 do not interfere with each other.

[0069] Embodiment 3

[0070] On the basis of embodiment 2, as shown in Figures 6-11 ,

[0071] Further comprising an adsorption assembly, each exhaust control system 3 is provided with an adsorption assembly;

[0072] Among them, the left adsorption assembly includes a hollow chamber 201, a second connecting pipe 202, a hollow strip 203 and a filter plate 204; the air jet chamber 102 is fixedly connected with the hollow chamber 201, and the hollow chamber 201 communicates with the air jet chamber 102; the hollow chamber 201 communicates with the air jet chamber 102 through the second connecting pipe 202; the second connecting pipe 202 is provided with an electrically controlled on-off valve; the hollow chamber 201 is fixedly connected with the hollow strip 203; the hollow strip 203 is fixedly connected with 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 provided to be telescopic.

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

[0075] In actual work, because the example facility 001 has some impurities (such as powdery chemical raw materials and garbage in the garbage station) when storing articles, the exhaust control system 3 will passively absorb a lot of dust when inhaling harmful air, which will cause the internal pipes of the device, such as the communication pipe 2 and the first connecting pipe 101, to be blocked, and most of these impurities are corrosive, which will further damage the stability of the device,

[0076] Therefore, the device is provided with an adsorption assembly. When the pump 1 starts to work reversely and harmful air is sucked in through the exhaust control system 3, the first connecting pipe 101 electric valve is closed, and the second connecting pipe 202 electric control switch valve is opened. At this time, the harmful gas enters the hollow warehouse 201 from the filter plate 204. In this process, the harmful gas and impurities in the air are filtered by the filter plate 204 to form the preliminary filtered air. The preliminary filtered air enters the external purification equipment through the hollow warehouse 201. Thus, not only can the device pipes be avoided from being corroded by the harmful gas and impurities, but also the working burden of the external purification equipment can be greatly reduced, and the air purification efficiency is improved.

[0077] Further, the filter plate 204 is provided with a plurality of convex parts 205. The convex parts 205 increase the contact area of the filter plate 204 with the harmful air and impurities, and improve the filtering capacity of the filter plate 204.

[0078] Further, in actual work, impurities will also adhere to the air distribution plate 103, causing the air distribution hole 1031 to be blocked. Thus, the first air flow 004 and the second air flow 005 will appear turbulent when generated, and the air absorption and purification capacity of the device will be reduced.

[0079] Therefore, the device is also provided with a hollow strip 203. The device drives the pump 1 to work regularly to transport external air to the hollow warehouse 201. The air enters the hollow strip 203 through the hollow warehouse 201. At this time, since the hollow strip 203 is blocked by the filter plate 204, the air expands the hollow strip 203 like a balloon. 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 parts 205 provided on the filter plate 204 will pass through the air distribution hole 1031 at the corresponding position to extrude the impurities adhered to the air distribution hole 1031, so that the air distribution hole 1031 is dredged. Thus, the problem that the impurities adhere to the air distribution hole 1031, causing the air distribution hole 1031 to be blocked, resulting in the first air flow 004 and the second air flow 005 appearing turbulent when generated, and reducing the air absorption and purification capacity of the device is avoided.

[0080] Further, since the filter plate 204 needs to filter the harmful air and impurities, it needs to be cleaned regularly. In order to facilitate the cleaning work, the hollow warehouse 201 includes a connecting box 2011 and an opening and closing plate 2012. When the filter plate 204 needs to be cleaned, the worker releases the buckle between the opening and closing plate 2012 and the connecting box 2011, and then opens the opening and closing plate 2012 like Figure 10 state. Thus, the filter plate 204 in the hollow warehouse 201 can be cleaned quickly, and the working convenience of the worker is improved.

[0081] Example 4

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

[0083] Further comprising flexible strip 304, filter sheet 305, winding assembly and pulling assembly; each exhaust control system 3 is provided with two front and rear distribution winding assembly; each exhaust control system 3 is provided with a pulling assembly, and each pulling assembly is connected with the corresponding position winding assembly, two front and rear distribution winding assembly is commonly connected with a flexible strip 304; each flexible strip 304 is fixedly connected with a filter sheet 305, and each filter sheet 305 is wound in the corresponding position winding assembly;

[0084] Wherein, the winding assembly of left rear side includes fixed box 301, reel 302 and torsion piece 303; the jet chamber 102 is fixedly connected with the fixed box 301; the fixed box 301 is connected with two upper and lower torsion pieces 303, and the upper torsion piece 303 penetrates the top of the fixed box 301.

[0085] The pulling assembly of left side includes pull rope 306, moving block 307, third connecting pipe 308 and scraping strip; the second connecting pipe 202 is communicated with the third connecting pipe 308; the moving block 307 is slidingly connected with the inner wall of the third connecting pipe 308, 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 with the pull rope 306, and the pull rope 306 is fixedly connected with the corresponding position torsion piece 303.

[0086] In order to filter the large particle impurities in the air and further ensure the work of the air uniformizing plate 103, the prior art often sets a layer of screen in front of the air uniformizing plate 103, so that the large particle impurities are preliminarily filtered, but the exhaust control system 3 of the device still needs to work to spray air to form the first airflow 004 and the second airflow 005, and the existence of the screen will affect the formation of the first airflow 004 and the second airflow 005, and further disturb the first airflow 004 and the second airflow 005, so that they cannot work normally, but if the screen is not set, the large particle impurities accumulate on the surface of the air uniformizing plate 103 to form lumps, so that the surface of the air uniformizing plate 103 becomes uneven, so that even if the ventilation hole 1031 is regularly dredged by the protrusion 205, the lumps attached around the ventilation hole 1031 will still affect the first airflow 004 and the second airflow 005;

[0087] Therefore, the device further sets the filter sheet 305, the winding assembly and the pulling assembly, the initial state of the filter sheet 305 is as shown in the figure Figure 15As shown, the components are fixed in a wound state on a reel 302. When the pump 1 starts to work in reverse, harmful air and impurities are drawn in through the exhaust gas control system 3. Since the hollow chamber 201 is under negative pressure at this time, and the third connecting pipe 308 is connected to the hollow chamber 201 through the second connecting pipe 202, the suction force generated by the negative pressure acts on the third connecting pipe 308. At this time, the slidingly connected and interference-fitted moving block 307 inside the third connecting pipe 308 moves under the action of the negative pressure suction force. Figure 15 The state changes to present Figure 14 state,

[0088] At this time, the movable block 307 stretches the connected pull rope 306, which in turn drives the connected torque member 303 to rotate, and the torque member 303 generates a reset torque. At this time, the torque member 303 drives the corresponding connected roller 302 to rotate. When the roller 302 rotates, it winds the flexible strip 304. When the flexible strip 304 winds, it causes the connected filter sheet 305 to unfold, forming... Figure 14 The device is in its unfolded state, and at this time, another scroll 302 is driven to rotate by the flexible strip 304, and at this time, the other scroll 302 drives another torque member 303 to rotate, generating a reset torque.

[0089] Thus, when pump 1 starts operating in reverse and harmful air and impurities are drawn in through exhaust gas control system 3, filter 305 can unfold to block large particles of impurities. When exhaust gas control system 3 is operating or not operating, air will pass through filter plate 204 and re-enter hollow chamber 201. At this time, moving block 307 will be reset by the reset torque of torque component 303 connected to pull rope 306. At the same time, another torque component 303 also releases reset torque to pull flexible strip 304 and filter 305 to reset.

[0090] This avoids the problem that existing technologies, such as setting up a partition net, would disrupt the first airflow 004 and the second airflow 005, preventing them from working properly. However, not setting up a partition net would cause the surface of the air distribution plate 103 to become uneven due to clumping, which would still affect the first airflow 004 and the second airflow 005.

[0091] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A device for preventing the escape of harmful gases, 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) via a connecting pipe; at least one exhaust gas control system (3) is connected to each end of the connecting pipe (2), and the two exhaust gas control systems (3) are located at the same horizontal position from a top-down perspective and operate in opposite directions; characterized in that: 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 sliders (5) are 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 retractable; The exhaust gas control system (3) on the left includes a first connecting pipe (101), a jet chamber (102), an air distribution plate (103), a ventilation hole (1031), and a guide vane (104); the first connecting pipe (101) is connected to the connecting pipe (2), and the first connecting pipe (101) is equipped with an electric valve; the first connecting pipe (101) is connected to the jet chamber (102), and the jet chamber (102) is open on the right; the jet chamber (102) is fixedly connected to the air distribution plate (103); the air distribution plate (103) has several ventilation holes (1031); the jet chamber (102) is connected to at least two obliquely arranged guide vanes (104), and each guide vane (104) is connected to the air distribution plate (103); There are three air guide vanes (104), and all air guide vanes (104) are set in a straight line at equal intervals; Among them, three air guide vanes (104) separate the oblique airflow ejected by the exhaust gas control system (3) to form a first airflow and a second airflow; Each air guide vane (104) includes a fixed vane (1041) and a rotating vane (1042); the air distribution plate (103) is fixedly connected to three fixed vanes (1041), the jet chamber (102) is connected to three rotating vanes (1042), and the vertical axis of each rotating vane (1042) passes through the upper part of the jet chamber (102), and each rotating vane (1042) contacts the fixed vane (1041) at the corresponding position; It also includes a first guide vane (1051) and a second guide vane (1052); the guide vane (104) in the middle of each jet chamber (102) is provided with the first guide vane (1051); the guide vane (104) behind each jet chamber (102) is provided with the second guide vane (1052). In this configuration, the first guide vane (1051) and the second guide vane (1052) are arranged such that each second airflow is further away from the corresponding first airflow along the jet direction.

2. The device for preventing the escape of harmful gases according to claim 1, characterized in that: The number of ventilation holes (1031) at the front of the air distribution plate (103) is greater than the number of ventilation holes (1031) at the rear of the air distribution plate (103).

3. The device for preventing the escape of harmful gases according to claim 2, characterized in that: It also includes an adsorption component, and each exhaust gas control system (3) is equipped with an adsorption component; wherein, 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 to the hollow chamber (201), and the hollow chamber (201) is connected to the jet chamber (102); the hollow chamber (201) is connected to the jet chamber (102) through the second connecting pipe (202); the second connecting pipe (202) is equipped with an electrically controlled switch valve; the hollow chamber (201) is fixedly connected to the hollow strip (203); the hollow strip (203) is fixedly connected to the filter plate (204).

4. The device for preventing the escape of harmful gases according to claim 3, characterized in that: Each filter plate (204) is provided with several protrusions (205), and the number and position of the protrusions (205) correspond to the number and position of the ventilation holes (1031); the hollow strip (203) is retractable.

5. The device for preventing the escape of harmful gases according to claim 4, characterized in that: The hollow chamber (201) includes a connecting box (2011) and a hinge plate (2012); the connecting box (2011) is fixedly connected to the jet chamber (102); the connecting box (2011) is rotatably connected to the hinge plate (2012) via a hinge, and the hinge plate (2012) is connected to the connecting box (2011) via a snap fastener.

6. The device for preventing the escape of harmful gases according to claim 5, characterized in that: It also includes a flexible strip (304), a filter (305), a winding assembly, and a pulling assembly; each exhaust gas control system (3) is provided with two front-to-back distributed winding assemblies; each exhaust gas control system (3) has a pulling assembly, and each pulling assembly is connected to the winding assembly at the corresponding position, and the two front-to-back distributed winding assemblies are connected to a flexible strip (304); each flexible strip (304) is fixedly connected to a filter (305), and each filter (305) is wound around the winding assembly at the corresponding position; wherein, the left rear winding assembly includes a fixed box (301), a roller (302), and a torque member (303); the jet chamber (102) is fixedly connected to the fixed box (301); the fixed box (301) is connected to two torque members (303) arranged vertically, and the upper torque member (303) penetrates through the top of the fixed box (301).

7. The device for preventing the escape of harmful gases according to claim 6, 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 scraper; the second connecting pipe (202) is connected to the third connecting pipe (308); the moving block (307) is slidably connected to the inner wall of the third connecting pipe (308), and the moving block (307) is interference-fitted 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 torque member (303) at the corresponding position.

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