A fire exhaust device for lithium battery energy storage

Abstract

The present invention relates to the field of fire fighting technology, and specifically to a fire fighting exhaust device for lithium battery energy storage, comprising an exhaust pipe and a negative pressure fan rack arranged on the inner wall of the middle section of the exhaust pipe, wherein a plurality of negative pressure fans are arranged on the negative pressure fan rack, the inner wall of the exhaust pipe is provided with a gasket made of high-temperature silicone material, a hedging buffer tube is embedded in the middle section of the exhaust pipe, a filter plate sliding groove is provided on the inner wall of the exhaust pipe, a collecting filter plate is slidingly provided on the inner wall of the filter plate sliding groove, an impact spring is provided between the edge side of the collecting filter plate and the inner wall of the sliding groove, and a plurality of second protective tubes are also penetrated and fixedly provided on the middle section of the exhaust pipe, and high-pressure gas is pressed into the exhaust pipe, and firstly the high-pressure gas is offset by the hedging buffer tube to reduce its moving speed and impact force, and then the high-pressure gas enters the second protective tube to weaken the speed and impact force again, and the impact force directly applied to the inner wall of the exhaust pipe is absorbed by the deformation of the gasket.

Description

Technical Field

[0001] The present invention relates to the field of fire fighting technology, and in particular to a fire fighting exhaust device for lithium battery energy storage. Background Art

[0002] An exhaust device is a device that can quickly extract and discharge smoke from a designated area. In the field of firefighting, a fire is often accompanied by a large amount of smoke and dust. The smoke and dust not only obstructs the line of sight, but also causes breathing difficulties when inhaled. Therefore, an exhaust device is needed to quickly extract the smoke and dust from the area where the fire occurs. The exhaust device usually consists of an exhaust duct and a negative pressure fan arranged in the exhaust duct. The negative pressure fan generates negative pressure to extract air from the fire area, and simultaneously carries the smoke and dust to move and be extracted, thereby ensuring visibility in the fire area and avoiding suffocation of people.

[0003] When lithium batteries are undergoing thermal runaway tests, they are prone to combustion in a thermal runaway state. At this time, in order to ensure visibility in the experimental chamber, the thermal runaway experiment of the lithium battery can be observed more conveniently. At the same time, the high-temperature air and smoke generated by the thermal runaway of the lithium battery can be extracted, and the smoke generated can be collected through the filter cover inside, which makes it more convenient to analyze the thermal runaway data. At the same time, the fire-fighting agent spray device can be used to quickly extinguish the fire to ensure safety.

[0004] Although the above-mentioned existing technology can solve the corresponding technical problems, it still has certain defects: when the existing exhaust device is in use, if the temperature of the lithium battery is too high during the thermal runaway test, it is easy to cause the lithium battery to explode, and the generated shock wave will quickly push the air into the exhaust device, thereby causing the pressure in the inner cavity of the exhaust duct of the exhaust device to rise instantly. At the same time, the temperature of the incoming air is very high. Due to the high pressure and high temperature, it is easy for the exhaust duct and the filter component for collecting smoke to be damaged after long-term use, resulting in leakage, affecting the exhaust effect. Summary of the invention

[0005] The purpose of the present invention is to provide a fire exhaust device for lithium battery energy storage that has strong impact resistance and can work normally under high-pressure impact in view of the defects and shortcomings of the prior art.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a fire exhaust device for lithium battery energy storage, comprising an exhaust pipe and a negative pressure fan rack arranged on the inner wall of the middle section of the exhaust pipe, the negative pressure fan rack is provided with a plurality of negative pressure fans, the inner wall of the exhaust pipe is provided with a gasket made of high-temperature silicone material, a hedging buffer tube is embedded in the middle section of the exhaust pipe, the inner wall of the exhaust pipe is provided with a filter plate sliding groove, the inner wall of the filter plate sliding groove is provided with a collecting filter plate slidingly, an impact spring is provided between the edge side of the collecting filter plate and the inner wall of the filter plate sliding groove, the middle section of the exhaust pipe is also penetrated and fixed with a plurality of second protective tubes, high-pressure gas is pressed into the exhaust pipe, firstly, the high-pressure gas is hedgingly guided by the hedging buffer tube to reduce its moving speed and impact force, and then the high-pressure gas enters the second protective tube to weaken the speed and impact force again, and absorbs the impact force directly applied to the inner wall of the exhaust pipe through the deformation of the gasket, the hedging buffer tube comprises a high-temperature rubber sleeve and a connecting plate arranged at the end of the high-temperature rubber sleeve A tensile column made of high-temperature silicone material is provided between the connecting plate and the inner wall end of the high-temperature rubber sleeve, a torsion spring wheel is provided on the tensile column, and a limiting plate for limiting the deformation of the high-temperature rubber sleeve is provided on the outer wall of the torsion spring wheel. A counter-flow guide block is also provided on the inner wall of the air inlet end of the high-temperature rubber sleeve, and the counter-flow guide block includes a prismatic diverter block provided on the inner wall of the air inlet end of the high-temperature rubber sleeve and an air inlet provided at the air inlet end of the diverter block. A transverse A flow tube, the other end of the cross flow tube is provided with a recoil tube that penetrates the side wall of the diverter block and is used to guide the airflow in the opposite direction and obliquely upwards, the inner wall of the recoil tube is provided with a one-way block, the inner wall of the air inlet is movably engaged with an elastic opening and closing frame, the one-way block comprises a connecting tube arranged on the inner wall of the recoil tube and an arc-shaped shrinking block arranged on the inner wall of the connecting tube, a moving ball is attached to the outer wall of the top of the shrinking block, a guide sheet is provided on the inner wall of the top of the connecting tube, and a recovery sheet is provided between the bottom surface of the guide sheet and the outer wall of the moving ball.

[0007] A further improvement is that a variable nozzle is movably engaged with the exhaust end of the exhaust pipe, and the variable nozzle includes an opening and closing plate movably engaged with the exhaust end of the exhaust pipe and a high-pressure exhaust block penetrating the opening and closing plate, and the high-pressure exhaust block includes a guide pipe penetrating the opening and closing plate and a circular expansion pipe arranged in the middle section of the guide pipe, a rotating rod is provided in the center of the expansion pipe, and a plurality of rotating handles are provided on the outer wall of the rotating rod, which are in contact with and slidably connected to the inner wall of the expansion pipe.

[0008] A further improvement is that the outer wall of the opening and closing plate is provided with a plurality of square heat dissipation slots.

[0009] A further improvement is that: the inner wall of the high-temperature rubber sleeve is provided with a guide block for guiding the airflow to move toward the center of the high-temperature rubber sleeve.

[0010] Further improvements are: the second protective tube includes an upper punch pipe that is penetrated and fixedly arranged in the middle section of the exhaust pipe and an opening and closing top cover that is movably engaged with the top of the upper punch pipe, a truncated cone-shaped collecting pipe is provided at the bottom of the upper punch pipe, a pressure spring is provided between the outer wall of the opening and closing top cover and the outer wall of the upper punch pipe, a friction frame is also slidably provided on the inner wall of the upper punch pipe, a limit block is provided on the inner wall of the top of the upper punch pipe, and a buffer spring is provided on the bottom surface of the limit block.

[0011] Further improvements are: the friction frame includes a friction plate that is in contact with the inner wall of the upper punch tube and is provided with a plurality of friction grooves, and an arc-shaped thrust plate arranged on the inner wall of the friction plate, an arc-shaped upward moving plate that is slidably connected to the inner wall of the friction plate is provided below the thrust plate, an anti-fall block is provided at the bottom of the inner wall of the friction plate for limiting the falling of the upward moving plate, and a plurality of hollow hemispherical deformation protrusions are provided below the thrust plate.

[0012] A further improvement is that a central groove is provided in the middle section of the bottom surface of the upward moving plate.

[0013] After adopting the above technical solution, the beneficial effects of the present invention are:

[0014] In the present invention, when high-pressure air is quickly pressed into the exhaust pipe as a result of the explosion, it will first pass through the counter-buffer tube, and the high-temperature rubber sleeve of the counter-buffer tube will expand and deform outward due to the pressure, thereby absorbing the pressure of the impact gas, and as the high-temperature rubber sleeve expands outward, its internal volume will expand, thereby reducing the gas pressure therein, thereby greatly reducing the passing gas pressure and impact force, and at the same time, the gas will move through the counter-buffer block, and part of the gas will enter the counter-buffer block and be reversely guided to counteract the forward-flowing gas, thereby making the gases offset each other's impact forces after the collision, thereby greatly reducing the impact force and pressure of the backward-flowing gas, effectively preventing the exhaust pipe from being damaged by the impact of excessively high-pressure gas, and having a long service life.

[0015] The present invention allows the gas to continue to move after passing through the buffer tube. If the gas pressure is still too high, the air entering the exhaust pipe will be pressed into the second buffer tube and push the friction frame of the second protective tube upward, thereby causing the friction plate of the friction frame to slide with the upper punch tube, thereby converting and absorbing the impact force of the gas through friction, thereby further weakening the impact force of the impact gas, and further reducing the impact pressure on the inner wall of the exhaust pipe, effectively preventing the exhaust pipe from being damaged by the impact of excessively high-pressure gas, and further extending its service life.

[0016] When the gas is discharged, if the gas pressure is relatively low, the gas can be discharged in a relatively small range by the retracted state of the variable nozzle, thereby facilitating the control of the exhaust gas emission range; when the gas pressure is relatively high, the opening and closing plates of the variable nozzle can be pushed open by the gas pressure to expand the exhaust range, thereby quickly pouring the high-pressure gas in the exhaust pipe outward, and rapidly reducing the gas pressure in the exhaust pipe; when the gas pressure is very high, the gas ejected outward can also enter the high-pressure exhaust block on the opening and closing plates, and push the high-pressure exhaust block, and under the action of the thrust on the opening and closing plates, eject it outward from the high-pressure exhaust block, further increasing the exhaust speed, allowing the high-pressure air in the exhaust pipe to be quickly released, and quickly reducing the impact force and pressure therein, effectively preventing the exhaust pipe from being damaged by the impact of excessively high-pressure gas, and further extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 is a schematic structural diagram of a front cross-section of the exhaust device of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a front cross section of a hedge buffer tube of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a front cross section of a hedging guide block of the present invention;

[0021] Figure 4 It is a structural schematic diagram of a front cross section of a one-way block of the present invention;

[0022] Figure 5 is a schematic structural diagram of a front cross-section of a second protective tube of the present invention;

[0023] Figure 6 It is a structural schematic diagram of a front cross section of the friction frame of the present invention;

[0024] Figure 7 is a schematic structural diagram of a front cross-section of a variable nozzle of the present invention;

[0025] Figure 8 It is a structural schematic diagram of a front cross-section of a high-pressure exhaust block of the present invention.

[0026] Explanation of reference numerals: exhaust pipe 1, variable nozzle 2, negative pressure fan frame 3, hedging buffer pipe 4, collecting filter plate 5, filter plate sliding groove 6, impact spring 7, second protection pipe 8, high temperature rubber sleeve 41, limiting plate 42, torsion spring wheel 43, stretching column 44, connecting plate 45, guide block 46, hedging guide block 47, diversion block 51, air inlet 52, elastic opening and closing frame 53, cross flow pipe 54, recoil pipe 55, one-way block 56, connecting pipe 61, contraction block 62, guide plate 63, moving ball-64, restoring plate-65, upper punch pipe-81, collecting pipe-82, friction frame-83, opening and closing top cover-84, with limit block-85, buffer spring-86, pressure spring-87, friction plate-831, friction groove-832, thrust plate-833, deformation protrusion-834, upper moving plate-835, central groove-836, anti-fall block-837, opening and closing plate-21, heat dissipation groove-22, high-pressure exhaust block-23, guide pipe-231, expansion pipe-232, rotating rod-233, rotating handle-234. DETAILED DESCRIPTION

[0027] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0028] See also Figure 1-8As shown, the technical solution adopted in this specific embodiment is: a fire exhaust device for lithium battery energy storage, comprising an exhaust pipe 1 and a negative pressure fan rack 3 arranged on the inner wall of the middle section of the exhaust pipe 1, a plurality of negative pressure fans are arranged on the negative pressure fan rack 3, the inner wall of the exhaust pipe 1 is provided with a gasket made of high-temperature silicone material, a hedging buffer tube 4 is embedded in the middle section of the exhaust pipe 1, the hedging buffer tube 4 comprises a high-temperature rubber sleeve 41 and a connecting plate 45 arranged at the end of the high-temperature rubber sleeve 41, a tensile column 44 made of high-temperature silicone material is arranged between the connecting plate 45 and the inner wall end of the high-temperature rubber sleeve 41, a torsion spring wheel 43 is arranged on the tensile column 44, and the outer wall of the torsion spring wheel 43 is provided with a limiting plate 42 for limiting the deformation of the high-temperature rubber sleeve 41 The inner wall of the air inlet end of the high-temperature rubber sleeve 41 is also provided with a counter-flow guide block 47, and the counter-flow guide block 47 includes a prismatic diverter block 51 arranged on the inner wall of the air inlet end of the high-temperature rubber sleeve 41 and an air inlet 52 arranged on the air inlet end of the diverter block 51. The diverter block 51 is also provided with a cross flow pipe 54 whose one end is connected to the air inlet 52. The other end of the cross flow pipe 54 is provided with a recoil pipe 55 that penetrates the side wall of the diverter block 51 and is used to guide the airflow in the opposite direction and obliquely upward. The inner wall of the recoil pipe 55 is provided with a one-way block 56, and the one-way block 56 includes a connecting pipe 61 arranged on the inner wall of the recoil pipe 55 and an arc-shaped contraction block 62 arranged on the inner wall of the connecting pipe 61. The outer wall of the top of the contraction block 62 is fitted with a moving ball 64. A guide piece 63 is provided on the inner wall at the top of the tube 61, and a recovery piece 65 is provided between the bottom surface of the guide piece 63 and the outer wall of the moving ball 64. An elastic opening and closing frame 53 is movably engaged with the inner wall of the air inlet 52. A filter plate sliding groove 6 is provided on the inner wall of the exhaust pipe 1. A collecting filter plate 5 is slidably provided on the inner wall of the filter plate sliding groove 6. An impact spring 7 is provided between the edge side of the collecting filter plate 5 and the inner wall of the filter plate sliding groove 6. A plurality of second protective tubes 8 are also penetrated and fixedly provided in the middle section of the exhaust pipe 1. The second protective tube 8 includes an upper punch pipe 81 which is penetrated and fixedly provided in the middle section of the exhaust pipe 1 and an opening and closing top cover 84 which is movably engaged with the top of the upper punch pipe 81. A truncated cone-shaped collecting tube 82 is provided at the bottom of the upper punch pipe 81. The outer wall of the opening and closing top cover 84 is connected to the upper punch pipe 81. 1, a pressure spring sheet 87 is provided between the upper punch tube 81 and the outer wall, and a friction frame 83 is also slidably provided on the inner wall of the upper punch tube 81. The friction frame 83 includes a friction plate 831 which is in contact with the inner wall of the upper punch tube 81 and is provided with a plurality of friction grooves 832, and an arc-shaped thrust plate 833 arranged on the inner wall of the friction plate 831. An arc-shaped upward moving plate 835 which is slidably connected to the inner wall of the friction plate 831 is provided below the thrust plate 833. An anti-falling block 837 for limiting the downward falling of the upward moving plate 835 is provided at the bottom of the inner wall of the friction plate 831. A plurality of hollow hemispherical deformation protrusions 834 are provided below the thrust plate 833. A limit block 85 is provided on the inner wall of the top of the upper punch tube 81, and a buffer spring 86 is provided on the bottom surface of the limit block 85. High-pressure gas is pressed into the exhaust pipe 1.First, the high-pressure gas is directed through the buffer tube 4 to reduce its moving speed and impact force. Then, the high-pressure gas enters the second protection tube 8 to weaken the speed and impact force again, and the impact force directly applied to the inner wall of the exhaust pipe 1 is absorbed by the deformation of the gasket. When in use, the air inlet end of the exhaust pipe 1 is connected to the side wall of the lithium battery thermal runaway test chamber. When the lithium battery is subjected to a thermal runaway test, the negative pressure fan on the negative pressure fan rack 3 can provide negative pressure suction, thereby extracting the smoke generated during thermal runaway. At the same time, during the extraction process, the particulate matter in the smoke will remain on the collection filter plate 5, so that the experimental data contained in the particulate matter can be easily obtained, and the other extracted smoke will be extracted through the exhaust pipe 1 and finally discharged from the exhaust pipe 1. The other end is released outward. During the experiment, if the lithium battery explodes during thermal runaway, the impact force will be suddenly released, and the air will be pushed into the exhaust pipe 1 with a higher pressure and a higher impact force. When the high-pressure air is quickly pressed into the exhaust pipe 1 with the explosion, it will first pass through the buffer tube 4, and the high-temperature rubber sleeve 41 of the buffer tube 4 will be deformed outward due to the pressure, thereby absorbing the pressure of the impact gas. At the same time, the connecting plate 45 connected to the exhaust pipe 1 and the tensile column 44 between the connecting plate 45 and the high-temperature rubber sleeve 41 are used to absorb the lateral force generated by the impact air. A limiting plate 42 connected to the tensile column 44 through a torsion spring wheel 43 is provided on the outer wall of the high-temperature rubber sleeve 41. When the high-temperature rubber sleeve 41 is deformed by impact, it will simultaneously push the limiting plate 42 and resist the elastic force of the torsion spring wheel 43, thereby limiting the excessive deformation of the high-temperature rubber sleeve 41 to prevent it from cracking due to excessive deformation, and further absorbing the impact force of the high-pressure air through the torsion spring wheel 43, so that the absorption effect is better. When the high-pressure gas enters, part of the high-pressure gas will squeeze the elastic opening and closing frame 53 on the air inlet 52 of the diverter block 51 to make it open, thereby allowing air to enter the air inlet 52, and move with the inner cavity of the air inlet 52, flow into the cross flow pipe 54, and flow with the cross flow pipe 54, enter the recoil pipe 55 from the other end of the cross flow pipe 54, and continue to flow into the one-way block 56, and from the connection of the one-way block 56 The pipe 61 enters and flows upward to squeeze the moving ball 64, making it move upward and squeeze the recovery piece 65, so that the moving ball 64 is no longer in contact with the contraction block 62, so that the gas is ejected upward. Since the recoil pipe 55 is an arc-shaped pipe and points to the opposite direction of the airflow, the incoming airflow can be guided to the opposite direction of the external airflow, so that when it is ejected outward, it is opposite to the direction of the incoming airflow and hits it, thereby offsetting the impact force of the incoming airflow, and then the impact force and pressure of the incoming airflow after passing through the buffer pipe 4 are greatly reduced, effectively preventing the exhaust pipe 1 from being damaged by the impact of excessively high pressure gas, and having a long service life. At the same time, when the flowing airflow tries to flow back into the recoil pipe 55,The moving ball 64 can be pressed by the air flow pressure and the elastic force of the recovery sheet 65 to make the moving ball 64 fit on the contraction block 62, thereby preventing the flow gas from flowing back, so that the recoil tube 55 can maintain the direction of the ejected gas, thereby ensuring the recoil direction of the gas ejected from the recoil tube 55 and ensuring the counteraction effect. After the high-pressure air passes through the counteraction buffer tube 4, if the gas pressure is still too high, the high-pressure air entering the exhaust pipe 1 will squeeze the inner wall of the exhaust pipe 1, and partially absorb the pressure through the gasket on the inner wall of the exhaust pipe 1. At the same time, the high-pressure air will be pressed into the second buffer tube 8, and then the high-pressure air will be received in a larger area through the collecting pipe 82, and the high-pressure air will be introduced into the upper punch tube 81, so that it moves quickly along the upper punch tube 81, and then push the friction frame 83 in the upper punch tube 81 to move upward. The friction plates 831 on both sides of the friction frame 83 cooperate with the friction grooves 832 provided thereon to generate strong friction resistance when being pushed upward, thereby the gas impact force of the high-pressure air is transmitted through the friction resistance The friction plate 831 is then driven by the friction plate 832 to push the friction plate 833 upwards and release the friction force.

[0029] The exhaust end of the exhaust pipe 1 is also movably engaged with a variable nozzle 2, and the variable nozzle 2 includes an opening and closing plate 21 movably engaged with the exhaust end of the exhaust pipe 1 and a high-pressure exhaust block 23 penetrating the opening and closing plate 21, and the high-pressure exhaust block 23 includes a guide tube 231 penetrating the opening and closing plate 21 and a circular expansion tube 232 arranged in the middle section of the guide tube 231, a rotating rod 233 is provided at the center of the expansion tube 232, and the outer wall of the rotating rod 233 is provided with a plurality of rotating handles 234 that are in contact with and slidably connected to the inner wall of the expansion tube 232. When the gas is discharged, if the gas pressure is small, the gas can be discharged in a smaller range by the retracted state of the variable nozzle 2, thereby facilitating the control of the exhaust gas emission range. When the gas pressure is high, the gas can be discharged by the gas retracted state. The body pressure is used to push open the opening and closing plate 21 of the variable nozzle 2, so that it opens and expands the exhaust range, thereby quickly pouring the high-pressure gas in the exhaust pipe 1 outward, and quickly reducing the gas pressure in the exhaust pipe 1. When the gas pressure is very high, the gas ejected outward can also enter the high-pressure exhaust block 23 on the opening and closing plate 21, and push the rotating handle 234 of the high-pressure exhaust block 23 to rotate, so that the high-pressure air can be discharged while not being discharged too quickly. Under the action of the thrust on the opening and closing plate, it is ejected outward from the high-pressure exhaust block 23, further increasing the exhaust speed, so that the high-pressure air in the exhaust pipe 1 is quickly released, and the impact force and pressure therein are quickly reduced, effectively preventing the exhaust pipe 1 from being damaged by the impact of excessively high-pressure gas, and further extending the service life;

[0030] The outer wall of the opening and closing plate 21 is provided with a plurality of square heat dissipation grooves 22, which are conducive to dissipating the gas heat received by the opening and closing plate 21 through the heat dissipation grooves 22, making its temperature lower, and avoiding burns caused by contact with it during use;

[0031] The inner wall of the high temperature rubber sleeve 41 is provided with a guide block 46 for guiding the airflow to move toward the center of the high temperature rubber sleeve 41, which is conducive to further guiding the flowing gas by the guide block 46, so that the flowing gas can better collide with the recoil gas, and the impact offset effect is better;

[0032] A central groove 836 is provided in the middle section of the bottom surface of the upward moving plate 835, which is conducive to concentrating the upward thrust on the upward moving plate 835 and avoiding the phenomenon that the friction frame 83 is pushed crooked and stuck and cannot move upward due to the upward thrust.

[0033] Working principle of the present invention: When the present invention is used, the air inlet end of the exhaust pipe 1 is connected to the side wall of the thermal runaway test chamber of the lithium battery. When the lithium battery is subjected to a thermal runaway test, the negative pressure fan on the negative pressure fan rack 3 can provide negative pressure suction, thereby extracting the smoke generated during the thermal runaway. At the same time, during the extraction process, the particulate matter in the smoke will remain on the collection filter plate 5, thereby conveniently obtaining the experimental data contained in the particulate matter, and the other extracted smoke will be extracted through the exhaust pipe 1 and finally released to the outside from the other end of the exhaust pipe 1. During the experiment, if the lithium battery explodes during the thermal runaway process, the impact force will be suddenly released, and the air will be pushed into the exhaust pipe 1 with a higher pressure and a higher impact force. The high-pressure air will When the explosion is quickly pressed into the exhaust pipe 1, it will first pass through the impact buffer tube 4, and cause the high-temperature rubber sleeve 41 of the impact buffer tube 4 to expand and deform outward due to the pressure, thereby absorbing the pressure of the impact gas, and at the same time cooperate with the connecting plate 45 connected to the exhaust pipe 1 and the stretching column 44 between the connecting plate 45 and the high-temperature rubber sleeve 41 to absorb the lateral force generated by the impact air. A limiting plate 42 connected to the stretching column 44 through a torsion spring wheel 43 is provided on the outer wall of the high-temperature rubber sleeve 41. When the high-temperature rubber sleeve 41 is deformed by the impact, it will simultaneously push the limiting plate 42 during deformation and resist the elastic force of the torsion spring wheel 43, thereby limiting the excessive deformation of the high-temperature rubber sleeve 41 to prevent it from excessive deformation and cracking, and further absorbing through the torsion spring wheel 43 The impact force of high-pressure air is absorbed to make the absorption effect better. When the high-pressure gas enters, part of the high-pressure gas will squeeze the elastic opening and closing frame 53 on the air inlet 52 of the diverter block 51 to make it open, so that the air enters the air inlet 52, and moves with the inner cavity of the air inlet 52, flows into the cross flow tube 54, and flows with the cross flow tube 54, enters the recoil tube 55 from the other end of the cross flow tube 54, and continues to flow into the one-way block 56, enters from the connecting tube 61 of the one-way block 56, and flows upward to squeeze the moving ball 64, making it move upward, and squeeze the recovery piece 65, so that the moving ball 64 is no longer in contact with the contraction block 62, so that the gas is ejected upward. Since the recoil tube 55 is an arc-shaped tube and points to the opposite direction of the airflow, it can The incoming airflow is guided obliquely upward in the opposite direction of the external airflow, so that when it is ejected outward, it is opposite to and counteracts the incoming airflow direction, thereby offsetting the impact force of the incoming airflow, and then the impact force and pressure of the gas after the incoming airflow passes through the counteracting buffer tube 4 are greatly reduced, effectively preventing the exhaust pipe 1 from being damaged by the impact of excessively high-pressure gas, and having a long service life. At the same time, when the flowing airflow tries to flow back into the recoil tube 55, the moving ball 64 can be squeezed by the airflow pressure and the elastic force of the recovery sheet 65 to make the moving ball 64 fit on the contraction block 62, thereby preventing the flowing gas from flowing back, so that the recoil tube 55 can maintain the direction of the ejected gas, thereby ensuring the recoil direction of the gas ejected from the recoil tube 55 and ensuring the counteracting effect.After the high-pressure air passes through the buffer tube 4, if the gas pressure is still too high, the high-pressure air entering the exhaust pipe 1 will squeeze the inner wall of the exhaust pipe 1 and absorb part of the pressure through the gasket on the inner wall of the exhaust pipe 1. At the same time, the high-pressure air will be pressed into the second buffer tube 8, and then the collecting tube 82 will receive the high-pressure air in a larger area, and introduce the high-pressure air into the upper punch tube 81, so that it moves quickly along the upper punch tube 81, and then push the friction frame 83 in the upper punch tube 81 to move upward. The friction plates 831 on both sides of the friction frame 83 cooperate with the friction grooves 832 provided thereon to generate strong friction resistance when being pushed upward, and then the gas impact force of the high-pressure air is absorbed through the friction resistance. At the same time, when the gas enters, it first impacts the upper moving plate 835, so that it is quickly pushed upward and hits the deformed protrusion 834. At this time The deformable protrusion 834 can further absorb the impact of the gas through deformation, and buffer the impact and transmit it to the thrust plate 833 relatively slowly so that it drives the friction plate 831 to slide, thereby preventing the impact force of the sudden high-pressure air from being applied to the thrust plate 833 and causing it to deform and damage. At the same time, when the friction frame 83 moves upward, the original air in the upper punch pipe 81 is pushed upward synchronously, thereby squeezing the opening and closing top cover 84, and then the air is discharged by opening and closing the opening and closing top cover 84. At the same time, when the opening and closing top cover 84 is opened, it is necessary to overcome the elastic force of the pressure spring sheet 87, and then the elastic force of the pressure spring sheet 87 can be used to further offset the impact force of the high-pressure air, thereby further reducing the impact pressure on the inner wall of the exhaust pipe 1, effectively preventing the exhaust pipe 1 from being damaged by the impact of excessively high-pressure gas, and further extending the service life.

[0034] The invention is intended to protect the structure of the product. The model of each component is not the content of the invention, and it is also a known technology. Any component on the market that can achieve the above functions of the invention can be used as a choice. Therefore, the model and other parameters of the component are not described in detail in the invention. The contribution of the invention lies in the scientific combination of the components.

[0035] The above shows and describes the basic principles and main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents. Anything not described in detail in the present invention is a well-known technology of those skilled in the art.

Claims

1. A fire exhaust device for lithium battery energy storage, comprising an exhaust pipe (1) and a negative pressure fan frame (3) arranged on the inner wall of the middle section of the exhaust pipe (1), wherein the negative pressure fan frame (3) is provided with a plurality of negative pressure fans, characterized in that: The inner wall of the exhaust pipe (1) is provided with a gasket made of high-temperature silicone material, a counter-buffer tube (4) is embedded in the middle section of the exhaust pipe (1), a filter plate sliding groove (6) is provided on the inner wall of the exhaust pipe (1), a collecting filter plate (5) is slidably provided on the inner wall of the filter plate sliding groove (6), an impact spring (7) is provided between the edge side of the collecting filter plate (5) and the inner wall of the filter plate sliding groove (6), and a plurality of second protective tubes (8) are also penetrated and fixedly provided in the middle section of the exhaust pipe (1). When high-pressure gas is pressed into the exhaust pipe (1), the high-pressure gas is firstly directed through the counter-buffer tube (4) to counteract and move. The speed and impact force are reduced, and then the high-pressure gas enters the second protection tube (8) to further reduce the speed and impact force, and absorbs the impact force directly applied to the inner wall of the exhaust pipe (1) through the deformation of the gasket. The impact buffer tube (4) comprises a high-temperature rubber sleeve (41) and a connecting plate (45) arranged at the end of the high-temperature rubber sleeve (41). A tensile column (44) made of high-temperature silicone material is arranged between the connecting plate (45) and the inner wall end of the high-temperature rubber sleeve (41). A torsion spring wheel (43) is arranged on the tensile column (44). The outer wall of the torsion spring wheel (43) is provided with a A limiting plate (42) is provided to prevent deformation of the high-temperature rubber sleeve (41); the inner wall of the air inlet end of the high-temperature rubber sleeve (41) is also provided with a counter-flow guide block (47); the counter-flow guide block (47) comprises a prismatic flow splitter block (51) arranged on the inner wall of the air inlet end of the high-temperature rubber sleeve (41) and an air inlet (52) arranged at the air inlet end of the flow splitter block (51); the flow splitter block (51) is also provided with a cross flow pipe (54) whose one end is connected to the air inlet (52); the other end of the cross flow pipe (54) is provided with a hole penetrating the side wall of the flow splitter block (51) and used to guide the airflow in the opposite direction and obliquely upward. A recoil pipe (55) is connected to the air inlet (52), the inner wall of the recoil pipe (55) is provided with a one-way block (56), the inner wall of the air inlet (52) is movably engaged with an elastic opening and closing frame (53), the one-way block (56) comprises a connecting pipe (61) arranged on the inner wall of the recoil pipe (55) and an arc-shaped contraction block (62) arranged on the inner wall of the connecting pipe (61), a moving ball (64) is attached to the outer wall of the top of the contraction block (62), a guide plate (63) is provided on the inner wall of the top of the connecting pipe (61), and a recovery plate (65) is provided between the bottom surface of the guide plate (63) and the outer wall of the moving ball (64).

2. A fire exhaust device for lithium battery energy storage according to claim 1, characterized in that: The exhaust end of the exhaust pipe (1) is also movably engaged with a variable nozzle (2), the variable nozzle (2) comprising an opening and closing plate (21) movably engaged with the exhaust end of the exhaust pipe (1) and a high-pressure exhaust block (23) penetrating the opening and closing plate (21), the high-pressure exhaust block (23) comprising a guide tube (231) penetrating the opening and closing plate (21) and a circular expansion tube (232) arranged in the middle section of the guide tube (231), a rotating rod (233) being arranged at the center of the expansion tube (232), and a plurality of rotating handles (234) being arranged on the outer wall of the rotating rod (233) and being in contact with and slidably connected to the inner wall of the expansion tube (232).

3. A fire exhaust device for lithium battery energy storage according to claim 2, characterized in that: The outer wall of the opening and closing plate (21) is provided with a plurality of square heat dissipation grooves (22).

4. A fire exhaust device for lithium battery energy storage according to claim 1, characterized in that: The inner wall of the high-temperature rubber sleeve (41) is provided with a guide block (46) for guiding the airflow to move towards the center of the high-temperature rubber sleeve (41).

5. A fire exhaust device for lithium battery energy storage according to claim 1, characterized in that: The second protective tube (8) comprises an upper punch tube (81) which is fixedly arranged through the middle section of the exhaust pipe (1) and an opening and closing top cover (84) which is movably engaged with the top of the upper punch tube (81); a truncated cone-shaped collecting tube (82) is provided at the bottom of the upper punch tube (81); a pressure spring (87) is provided between the outer wall of the opening and closing top cover (84) and the outer wall of the upper punch tube (81); a friction frame (83) is also slidably provided on the inner wall of the upper punch tube (81); a limit block (85) is provided on the inner wall of the top of the upper punch tube (81); and a buffer spring (86) is provided on the bottom surface of the limit block (85).

6. A fire exhaust device for lithium battery energy storage according to claim 5, characterized in that: The friction frame (83) comprises a friction plate (831) which is in contact with the inner wall of the upper punch tube (81) and is provided with a plurality of friction grooves (832), and an arc-shaped thrust plate (833) arranged on the inner wall of the friction plate (831); an arc-shaped upward moving plate (835) which is slidably connected to the inner wall of the friction plate (831) is arranged below the thrust plate (833); an anti-falling block (837) for limiting the downward falling of the upward moving plate (835) is arranged at the bottom of the inner wall of the friction plate (831); and a plurality of hollow hemispherical deformation protrusions (834) are arranged below the thrust plate (833).

7. A fire exhaust device for lithium battery energy storage according to claim 6, characterized in that: A central groove (836) is provided in the middle section of the bottom surface of the upward moving plate (835).

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