A circulating water curtain type tunnel cooling and dust removing device

Abstract

The application belongs to the technical field of gas and solid dust particle separation, and particularly relates to a circulating water curtain type tunnel cooling and dust removal device, which comprises a support and further comprises: a water return tank fixedly arranged at the bottom of the support, a spraying mechanism arranged between the inside of the water return tank and the top of the support, and a plurality of suction holes evenly distributed at the top of the water return tank; and a traction suction mechanism arranged on the side wall of the water return tank. The application can guide dust-containing air to fully contact with the water curtain through synergistic effect, improve dust interception and cooling effect, avoid dust diffusion and water mist waste, dynamically adjust air flow traction strength according to dust concentration and temperature in the tunnel, reduce energy consumption while ensuring dust removal and cooling efficiency, realize efficient condensation of dust-containing water mist, reduce water resource consumption, ensure condensation effect and working condition adaptation through linkage adjustment, and reduce equipment invalid loss.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gas and solid dust particle separation, and particularly relates to a circulating water curtain type tunnel cooling and dust removal device. BACKGROUND

[0002] During tunnel construction, a large amount of dust is continuously generated due to factors such as blasting operation, shield tunneling, and mechanical operation, and the temperature in the tunnel is also increased due to rock body temperature rise and mechanical heat dissipation. If not handled in a timely manner, it is easy to cause respiratory diseases and heatstroke of workers, and may also affect the stability of construction equipment and the construction quality of materials such as concrete, so cooling and dust removal treatment is needed. In current mainstream tunnel cooling and dust removal devices, water curtain type equipment is widely used, such as the circulating water curtain type tunnel cooling and dust removal device disclosed in the announcement No. CN115888285B.

[0003] However, in actual use, the water spray amount and airflow traction degree of the cooling and dust removal device forming a water curtain are mostly preset fixed values, and cannot be automatically adjusted according to the actual dust concentration and temperature changes in the tunnel. Since the dust concentration and temperature in the tunnel are in a dynamic fluctuation state, when the dust concentration or temperature is low, if the high-flow water spray and high-airflow traction degree are still maintained, a large amount of water resources will be discharged or lost without participating in effective dust removal and cooling, and at the same time, the utilization efficiency of water resources will be reduced. On the contrary, when the dust concentration or temperature is high, the water curtain formed by the fixed low-flow water spray and low-airflow traction degree cannot fully intercept fine particle dust, and the amount of water evaporation is insufficient, the cooling effect is greatly attenuated, and it is difficult to meet the safety and comfort requirements of the working environment in the tunnel.

[0004] Therefore, a circulating water curtain type tunnel cooling and dust removal device is proposed. SUMMARY

[0005] The purpose of the present application is to provide a circulating water curtain type tunnel cooling and dust removal device to solve the above problems.

[0006] To achieve the above purpose, the following technical scheme is adopted: a circulating water curtain type tunnel cooling and dust removal device, comprising a support, further comprising:

[0007] a water return tank fixedly arranged at the bottom of the support, a spraying mechanism being arranged between the inside of the water return tank and the top of the support, and a plurality of suction holes being uniformly arranged at the top of the water return tank;

[0008] a traction suction mechanism arranged on the side wall of the water return tank and in communication with the water return tank;

[0009] a plurality of traction degree adjusting mechanisms arranged in the inside of the plurality of suction holes and automatically adjusted according to the dust concentration and temperature.

[0010] A plurality of condensing mechanisms are arranged in the interior of the return water tank, and the plurality of condensing mechanisms are respectively located below the plurality of traction force adjusting mechanisms;

[0011] A plurality of filtering mechanisms are arranged in the interior of the return water tank, and the plurality of filtering mechanisms are respectively located below the plurality of condensing mechanisms;

[0012] A sensor group is fixedly arranged on the side wall of the support, the side wall of the support is fixedly provided with a PLC controller, and the spraying mechanism, the traction suction mechanism, the traction force adjusting mechanism, the condensing mechanism and the sensor group are electrically connected with the PLC controller.

[0013] Preferably, the spraying mechanism comprises a water pump fixedly arranged in the interior of the return water tank, an output end of the water pump is fixedly provided with a first water pipe extending to the outside of the return water tank, a top of the support is fixedly provided with a second water pipe, both ends of the second water pipe adopt a closed structure, one end of the first water pipe away from the water pump is fixedly connected with the pipe wall of the second water pipe, and a plurality of evenly distributed atomizing nozzles are fixedly arranged on the lower side of the pipe wall of the second water pipe.

[0014] Preferably, the traction suction mechanism comprises an air extractor fixedly arranged on the side wall of the return water tank, an input end of the air extractor is fixedly provided with a first air extraction pipe, both ends of the first air extraction pipe adopt a closed structure, a plurality of evenly distributed second air extraction pipes are fixedly arranged on the pipe wall of the first air extraction pipe, and one end of the second air extraction pipe away from the first air extraction pipe is fixedly connected with the side wall of the return water tank.

[0015] Preferably, the traction force adjusting mechanism comprises a circular truncated cone plug located in the interior of the suction hole, both sides of the bottom of the circular truncated cone plug are fixedly provided with sliding plates, both the interiors of the two sliding plates are provided with sliding rods, the upper ends of the two sliding rods are fixedly connected with the top inner wall of the return water tank, the lower ends of the two sliding rods are fixedly provided with a same fixing disc, the rod walls of the two sliding rods are both sleeved with first springs, both ends of the first spring are respectively fixedly connected with the sliding plate and the return water tank, the top of the fixing disc is fixedly provided with an electromagnetic block, and the bottom of the circular truncated cone plug is fixedly provided with a permanent magnet block.

[0016] Preferably, the condensing mechanism comprises a plurality of evenly distributed partition plates fixedly arranged in the interior of the return water tank, a plurality of evenly distributed condensing plates are arranged between adjacent two partition plates, the top of each of the plurality of condensing plates is rotationally arranged in the interior of the return water tank through a rotating shaft, one end of each of the plurality of rotating shafts extends to the outside of the return water tank and is provided with a transmission mechanism connected with the top of the circular truncated cone plug.

[0017] Preferably, the transmission mechanism comprises a cover body fixedly arranged on the side wall of the water return tank, one end of each of the plurality of rotating shafts extends into the cover body and is fixedly provided with a gear, a rack is transversely slidably arranged in the cover body, the rack is arranged in meshing with the plurality of gears, the top of the circular truncated plug is fixedly provided with a connecting rod, one end of the connecting rod away from the circular truncated plug is fixedly provided with a connecting rope, and one end of the connecting rope away from the connecting rod extends into the cover body and is connected with one side of the rack.

[0018] Preferably, a square rod is transversely fixedly arranged in the cover body, a square sleeve is slidably arranged on the rod wall of the square rod, the side wall of the square sleeve is fixedly connected with the side wall of the rack, one end of the square rod is sleeved with a second spring, and the two ends of the second spring are fixedly connected with the square sleeve and the cover body respectively, a guide wheel is rotatably arranged in the cover body, and one end of the connecting rope passes through the guide wheel and is fixedly connected with the top of the square sleeve.

[0019] Preferably, the filter mechanism comprises a filter plate fixedly arranged between two adjacent bottom plates, and the filter plate is fixedly connected with the inner side wall of the water return tank, a filter hole is formed in the middle of the filter plate, a fixing ring is threadedly arranged in the filter hole, and a filter screen is fixedly arranged in the fixing ring, and a sealing cover plate is arranged on the side wall of the water return tank and corresponds to the positions of the plurality of filter plates.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] By arranging the spraying mechanism and the traction suction mechanism, the spraying mechanism forms a uniform and fine water curtain, dust capture is realized by using the inertial collision and adsorption effect of water mist particles and dust, and cooling is realized by relying on water mist evaporation heat absorption and heat conduction; the traction suction mechanism can continuously extract the gas in the water return tank, so that the water return tank forms a stable negative pressure, and then generates directional airflow traction in the support through the suction hole, which can guide the dispersed dust-containing air in the tunnel to flow to the water curtain area actively, avoid the diffusion of dust to the deep part of the tunnel, greatly improve the contact probability of dust and the water curtain, stabilize the water curtain shape, prevent the water mist from scattering or breaking due to natural turbulence in the tunnel, ensure the continuity and uniformity of the water curtain coverage, and accelerate the settlement of the mixture after the fusion of the water curtain and the dust, so that the dust removal and cooling effect is more direct and efficient.

[0022] Through the traction degree adjusting mechanism, based on the dust concentration and temperature change, the current of the electromagnetic block is adjusted through the PLC controller, the gap between the circular truncated cone plug and the suction hole is changed, when the dust concentration or temperature is high, the current of the electromagnetic block is reduced, the plug is moved up under the action of the first spring, the gap of the suction hole is increased, the airflow traction degree is enhanced by cooperating with the traction suction mechanism, and high-concentration dust can be effectively guided to the water curtain; when the dust concentration or temperature is reduced, the current of the electromagnetic block is increased, the adsorption plug is moved down to reduce the gap, and the traction degree is reduced, so that the over-strong airflow does not cause excessive loss of water mist, the rational use of the output power of the traction suction mechanism is ensured, and the airflow traction degree is always matched with the actual working condition through fine adjustment, so that the energy waste caused by fixed strong traction is avoided while the dust removal and cooling effect is ensured.

[0023] Through the setting of the condensing mechanism and the transmission mechanism, the condensing mechanism can condense the dust-containing water mist sucked into the suction hole into liquid water droplets, laying a foundation for subsequent filtering and reuse, when the circular truncated cone plug is moved down to reduce the traction degree by the traction degree adjusting mechanism, the linkage transmission mechanism reduces the inclination angle of the condensing plate, and the contact area of the condensing plate with the water mist is reduced, so that the water mist amount at this time is adapted, and the condensing plate is avoided from being idle and in invalid energy consumption; when the circular truncated cone plug is moved up to enhance the traction degree, the linkage transmission mechanism increases the inclination angle of the condensing plate, and the contact area is expanded, so as to match the increased water mist, and ensure that the condensation is timely and sufficient, so that the condensing mechanism is always accurately matched with the water mist amount and the traction degree, the problems of water flow accumulation and untimely condensation are avoided, the water droplets after condensation can stably flow to the filtering mechanism, and clean circulating water source is provided for the water return tank, so that the water resource waste is greatly reduced, and the invalid loss of the condensing mechanism is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a front perspective view of a circulating water curtain type tunnel cooling and dust removal device provided by the application;

[0025] Figure 2 is a back perspective view of a circulating water curtain type tunnel cooling and dust removal device provided by the application;

[0026] Figure 3 is a perspective view of a circulating water curtain type tunnel cooling and dust removal device after the water return tank is cut open;

[0027] Figure 4 is a partial perspective view of a circulating water curtain type tunnel cooling and dust removal device after the water return tank is cut open;

[0028] Figure 5 is a partial perspective view of the outside of a circulating water curtain type tunnel cooling and dust removal device return tank;

[0029] Figure 6It is a kind of circulating water curtain formula tunnel cooling dust removal device provided in the present application the perspective drawing of rack, square rod and square sleeve;

[0030] Figure 7 It is a kind of circulating water curtain formula tunnel cooling dust removal device provided in the present application the perspective drawing of rack, square rod and square sleeve;

[0031] In the drawing: 1 support, 2 backwater tank, 3 spraying mechanism, 31 water pump, 32 first water pipe, 33 second water pipe, 34 atomizing nozzle, 4 suction hole, 5 traction suction mechanism, 51 air blower, 52 first air duct, 53 second air duct, 6 traction degree adjusting mechanism, 61 circular table plug, 62 slide plate, 63 slide rod, 64 fixed disc, 65 first spring, 66 energized magnetic block, 67 permanent magnet block, 7 condensing mechanism, 71 partition, 72 condensing plate, 73 rotating shaft, 74 transmission mechanism, 741 cover body, 742 gear, 743 rack, 744 connecting rod, 745 connecting rope, 746 square rod, 747 square sleeve, 748 second spring, 749 guide wheel, 8 filtering mechanism, 81 filter plate, 82 filter hole, 83 fixed ring, 84 filter screen, 85 sealing cover plate, 9 sensor group, 10 PLC controller. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0033] As Figures 1-7 shown, a circulating water curtain formula tunnel cooling dust removal device, comprising a support 1, further comprising:

[0034] The backwater tank 2 is fixedly arranged at the bottom of the support 1, and the spraying mechanism 3 is arranged between the inside of the backwater tank 2 and the top of the support 1. A plurality of suction holes 4 are evenly distributed on the top of the backwater tank 2. The spraying mechanism 3 comprises a water pump 31 fixedly arranged in the backwater tank 2. The output end of the water pump 31 is fixedly provided with a first water pipe 32 extending to the outside of the backwater tank 2. The top of the support 1 is fixedly provided with a second water pipe 33, and the two ends of the second water pipe 33 are in a closed structure. The end of the first water pipe 32 away from the water pump 31 is fixedly connected with the pipe wall of the second water pipe 33. A plurality of atomizing nozzles 34 are evenly distributed and fixedly arranged on the lower side of the pipe wall of the second water pipe 33. The water pump 31 is started to pressurize the circulating water stored in the backwater tank 2 and pump it into the first water pipe 32 and the second water pipe 33. The water flow is conveyed to the plurality of atomizing nozzles 34 on the top of the support 1 through the first water pipe 32 and the second water pipe 33, and the water flow is atomized into fine mist by the atomizing nozzles 34.

[0035] A traction suction mechanism 5 is arranged on the side wall of the water return tank 2 and is in communication with the water return tank 2. The traction suction mechanism 5 comprises an air extractor 51 fixedly arranged on the side wall of the water return tank 2. The input end of the air extractor 51 is fixedly provided with a first air extraction pipe 52. The two ends of the first air extraction pipe 52 are in a closed structure. The pipe wall of the first air extraction pipe 52 is fixedly provided with a plurality of second air extraction pipes 53 uniformly distributed. The end of the second air extraction pipe 53 away from the first air extraction pipe 52 is fixedly connected with the side wall of the water return tank 2. The end of the plurality of second air extraction pipes 53 connected with the water return tank 2 is arranged in an inclined manner downward at an angle, so that a small amount of clean water is automatically flowed out after being sucked into the second air extraction pipe 53.

[0036] A plurality of traction degree adjusting mechanisms 6 are arranged in the interiors of the plurality of suction holes 4 and are self-adjusted according to dust concentration and temperature. The traction degree adjusting mechanism 6 comprises a circular truncated cone plug 61 arranged in the interior of the suction hole 4. The circular truncated cone plug 61 is arranged in a manner that the large diameter is upward and the small diameter is downward. The two sides of the bottom of the circular truncated cone plug 61 are fixedly provided with sliding plates 62. The interiors of the two sliding plates 62 are provided with sliding rods 63. The upper ends of the two sliding rods 63 are fixedly connected with the inner wall of the top of the water return tank 2. The lower ends of the two sliding rods 63 are fixedly provided with a same fixed disc 64. The rod walls of the two sliding rods 63 are both sleeved with first springs 65. The two ends of the first spring 65 are fixedly connected with the sliding plate 62 and the water return tank 2, respectively. The top of the fixed disc 64 is fixedly provided with an electromagnetic block 66. The bottom of the circular truncated cone plug 61 is fixedly provided with a permanent magnet block 67. The current to the electromagnetic block 66 is changed, so that the magnetic attraction of the electromagnetic block 66 to the permanent magnet block 67 is changed, thereby being capable of adjusting the gap size between the circular truncated cone plug 61 and the suction hole 4.

[0037] A plurality of condensing mechanisms 7 are arranged in the interior of the return water tank 2, and the plurality of condensing mechanisms 7 are respectively located below the plurality of traction force adjusting mechanisms 6; the condensing mechanism 7 comprises a plurality of evenly distributed partition plates 71 fixedly arranged in the interior of the return water tank 2, a plurality of evenly distributed condensing plates 72 are arranged between adjacent two partition plates 71, the top of the plurality of condensing plates 72 is rotationally arranged in the interior of the return water tank 2 through the pivot 73, the condensing plate 72 can be angularly rotated through the pivot 73, and water droplets formed by condensation can be adsorbed on the surface of the condensing plate 72, but the condensing plate 72 always maintains an inclined state and automatically flows downward under the action of the gravity of the water droplets; one end of the plurality of pivots 73 extends to the outside of the return water tank 2 and is provided with a transmission mechanism 74 connected with the top of the circular truncated cone plug 61, the transmission mechanism 74 comprises a cover body 741 fixedly arranged on the side wall of the return water tank 2, one end of the plurality of pivots 73 extends to the interior of the cover body 741 and is fixedly provided with a gear 742, a rack 743 is slidingly arranged in the interior of the cover body 741 in the transverse direction, the rack 743 is in meshing arrangement with the plurality of gears 742, the top of the circular truncated cone plug 61 is fixedly provided with a connecting rod 744, one end of the connecting rod 744 away from the circular truncated cone plug 61 is fixedly provided with a connecting rope 745, one end of the connecting rope 745 away from the connecting rod 744 extends to the interior of the cover body 741 and is connected with one side of the rack 743; a square rod 746 is fixedly arranged in the interior of the cover body 741 in the transverse direction, a square sleeve 747 is slidingly arranged on the rod wall of the square rod 746, the side wall of the square sleeve 747 is fixedly connected with the side wall of the rack 743, one end of the square rod 746 is sleeved with a second spring 748, and the two ends of the second spring 748 are respectively fixedly connected with the square sleeve 747 and the cover body 741, a guide wheel 749 is rotationally arranged in the interior of the cover body 741, one end of the connecting rope 745 passes through the guide wheel 749 and is fixedly connected with the top of the square sleeve 747, the guide wheel 749 can change the pulling direction of the connecting rope 745, when the circular truncated cone plug 61 moves upward, the connecting rod 744 and the connecting rope 745 can generate a pulling force on the rack 743, so that the rack 743 synchronously drives the plurality of gears 742 to rotate clockwise, on the contrary, when the circular truncated cone plug 61 moves downward, the pulling force on the rack 743 is removed, at this time, the second spring 748 applies an elastic force to the square sleeve 747, so that the rack 743 moves reversely and drives the plurality of gears 742 to rotate counterclockwise.

[0038] A plurality of filtering mechanisms 8 are arranged in the interior of the water return tank 2, and the plurality of filtering mechanisms 8 are respectively located below the plurality of condensing mechanisms 7; the filtering mechanism 8 comprises a filtering plate 81 fixedly arranged between the bottoms of two adjacent partitions 71, and the filtering plate 81 is fixedly connected with the inner side wall of the water return tank 2, a filtering hole 82 is formed in the middle of the filtering plate 81, a fixing ring 83 is threadedly arranged in the interior of the filtering hole 82, and a filtering screen 84 is fixedly arranged in the interior of the fixing ring 83; a sealing cover plate 85 is arranged on the side wall of the water return tank 2 and corresponds to the positions of the plurality of filtering plates 81; the filtering screen 84 adopts a multi-layer structure, which can improve the filtering effect on sewage; when the filtering screen 84 needs to be cleaned, the sealing cover plate 85 is manually opened, and then the fixing ring 83 is rotated to be screwed out from the interior of the filtering hole 82, so that the filtering screen 84 can be cleaned.

[0039] A sensor group 9 is fixedly arranged on the side wall of the support 1, the sensor group 9 integrates a dust sensor and a temperature sensor, can monitor the dust concentration and the environmental temperature in the tunnel in real time, and the side wall of the support 1 is fixedly provided with a PLC controller 10; the spraying mechanism 3, the traction suction mechanism 5, the traction force adjusting mechanism 6, the condensing mechanism 7 and the sensor group 9 are all electrically connected with the PLC controller 10.

[0040] The operation principle of the application is described as follows: first, the construction personnel place the support 1 at a preset position in the construction tunnel, then vertically punch the fixed piles on both sides of the support 1 into the tunnel bottom rock stratum or hardened ground, utilize the close engagement between the fixed piles and the stratum to enhance the overall stability of the support 1, prevent the support 1 from deviating due to air flow fluctuation or equipment vibration in subsequent operation, meanwhile, considering that the construction tunnel usually has a long extension distance, in order to ensure that the cooling and dust removal effect covers the whole tunnel, a plurality of groups of cooling and dust removal devices need to be arranged at a uniform interval along the tunnel, each group of device corresponds to cover a section of tunnel area, forms a continuous protection interval, after installation and no error are checked, the device power supply is connected, and the preliminary preparation work is completed;

[0041] Then, the construction personnel operate the PLC controller 10 to synchronously start the water pump 31 and the air blower 51; after the water pump 31 is started, the circulating water stored in the water return tank 2 is pressurized and pumped into the first water pipe 32 and the second water pipe 33, the water flow is delivered to the plurality of atomizing nozzles 34 on the top of the support 1 through the first water pipe 32 and the second water pipe 33, the water flow is atomized into fine mist by the atomizing nozzles 34, and the fine mist is interwoven to form a uniform water curtain in the interior space of the support 1; the water mist particles and the dust particles suspended in the air collide, adsorb and fuse, so that the originally light and floating dust is wrapped by the water mist and increases in weight, and then the dust is settled with the water mist to the upper side of the water return tank 2; meanwhile, when the water mist contacts with the high-temperature air in the tunnel, part of the water mist is rapidly evaporated, the evaporation process absorbs the heat in the air, and the water mist which has not evaporated reduces the temperature of the surrounding air through the heat conduction effect, so that the effective regulation of the environmental temperature in the tunnel is realized by the double mechanisms.

[0042] When the air extractor 51 is working, the gas inside the water return tank 2 is continuously extracted through the first air extraction pipe 52 and the second air extraction pipe 53, so that the water return tank 2 forms a stable negative pressure, and then the uniform suction force is generated on the internal space of the support 1 through the plurality of suction holes 4 opened at the top of the water return tank 2, so as to provide directional airflow traction for the water curtain, guide the dust-containing air in the tunnel to flow to the water curtain area actively, avoid the dust from spreading to the deep part of the tunnel, increase the contact probability of the dust and the water curtain, and at the same time, stabilize the water curtain shape, prevent the water mist from scattering or breaking due to the natural turbulence in the tunnel, and ensure the continuity and uniformity of the water curtain coverage. In addition, the mixture after the water curtain and the dust are mixed can be accelerated to settle;

[0043] At the same time, the suction holes 4 at the top of the water return tank 2 will suck the water mist after the dust in the support 1 fully contacts into the water return tank 2 under the negative pressure action of the traction suction mechanism 5. After the dust-containing water mist enters the water return tank 2, it will flow through the plurality of condensation plates 72 corresponding to the suction holes 4 below. The condensation plates 72 reduce the temperature of the water mist by their heat conduction characteristics, so that the water mist in the gas state is quickly condensed and liquefied to form fine water droplets. Under the action of gravity, these water droplets carrying dust impurities naturally drop on the surface of the filter plate 81 below the condensation plate 72. The filter holes 82 opened on the filter plate 81 are equipped with a multi-layer structure of the filter screen 84. The upper layer is a coarse filter layer, which can intercept the dust particles and impurities in the water droplets, so as to avoid the subsequent fine filter layer from being blocked too fast. The middle layer is a fine filter layer, which can capture the fine dust particles remaining after coarse filtration, further purify the water quality, and the lower layer is a protection layer, which can prevent the filter material fibers of the fine filter layer from falling off, so as to ensure that the filtered water is clean. After being filtered by the filter screen 84, the clean water without impurities will fall on the water storage area at the bottom of the water return tank 2, so as to realize automatic collection. Finally, the clean circulating water stored at the bottom of the water return tank 2 can be extracted by the water pump 31 again, and then be transported to the first water pipe 32 and the second water pipe 33, so as to form the water curtain again through the atomizing nozzle 34, which not only reduces the waste of water resources, but also ensures the continuous and stable dust removal and cooling effect of the water curtain.

[0044] Notably, before starting the water pump 31 and the air extractor 51, the sensor group 9 installed in the key position of the support 1 has entered the working state, which integrates the dust sensor and the temperature sensor, can monitor the dust concentration and the ambient temperature inside the tunnel in real time, and converts the collected real-time data into electrical signals and transmits them to the PLC controller 10. The PLC controller 10 analyzes and judges the dust concentration value and the temperature value according to the preset control logic. If the dust concentration or the temperature is high, the power of the water pump 31 is automatically increased to increase the water spray amount and the water curtain density, and the power of the air extractor 51 is also increased to enhance the air flow traction, so as to ensure the dust removal and cooling effect. If the dust concentration and the temperature are within the normal range, the basic running power of the water pump 31 and the air extractor 51 is maintained, which can ensure the protection effect while avoiding the waste of energy and water resources.

[0045] When the PLC controller 10 adjusts the basic power of the water pump 31 and the air extractor 51 according to the dust concentration and the temperature data fed back by the sensor group 9 according to the preset logic, it will simultaneously control the current size to the energized electromagnetic block 66 to realize the coordinated adaptation of the traction of the suction hole 4 and the angle of the condensation plate 72. Specifically as follows:

[0046] When the PLC controller 10 increases the current to the energized electromagnetic block 66, the magnetic field strength generated inside the energized electromagnetic block 66 is increased, and the magnetic adsorption force to the lower permanent magnet block 67 is also increased. Under the action of the adsorption force, the permanent magnet block 67 drives the fixed circular truncated cone plug 61 to move downward along the vertical direction. At the same time, the sliding plates 62 on both sides of the circular truncated cone plug 61 slide downward along the slide rods 63, and stretch the first spring 65 at the top. As the circular truncated cone plug 61 moves downward, the gap between the circular truncated cone plug 61 and the inner wall of the suction hole 4 is gradually reduced, and the effective ventilation area of the suction hole 4 is also reduced, which can reduce the air flow traction to the water curtain and avoid excessive loss of water mist caused by excessive air flow. Conversely, the PLC controller 10 reduces the current to the energized electromagnetic block 66, the magnetic adsorption force of the energized electromagnetic block 66 is weakened, the first spring 65 is released, and the upward reset elastic force is applied to the sliding plate 62, which drives the sliding plate 62, the circular truncated cone plug 61 and the permanent magnet block 67 to move upward as a whole. After the circular truncated cone plug 61 moves upward, the gap between the circular truncated cone plug 61 and the suction hole 4 is increased, the effective ventilation area is expanded, and the air flow traction is increased, which can more efficiently guide the dust-containing air to the water curtain.

[0047] When the conical plug 61 moves downward to reduce the degree of traction, the fixed connecting rod 744 at the top of the conical plug 61 moves downward, and the pulling force on the connecting rope 745 gradually decreases. At this time, the second spring 748 on the square rod 746 inside the cover 741 is released from the pulling force constraint, and the elastic force pushes the square sleeve 747 to slide to the right along the square rod 746. The fixed rack 743 on the side wall of the square sleeve 747 moves synchronously to the right. Since the rack 743 is engaged with the plurality of gears 742, the movement of the rack 743 will drive the gears 742 to rotate counterclockwise, and the rotating shaft 73 inside the gear 742 will rotate synchronously, thereby adjusting the angle of the condensing plate 72 in the counterclockwise direction. When the inclination angle of the condensing plate 72 decreases, the area of the plane it spreads in the water tank 2 shrinks, and the contact range of the rising water mist decreases synchronously. At this time, the degree of traction decreases, the amount of water mist generated by the water curtain and the rising speed decrease accordingly, and reducing the contact area of the condensing plate 72 can avoid "empty" due to insufficient water mist, and reduce the energy consumption caused by ineffective condensation. It ensures that the condensing efficiency and the amount of water mist are accurately matched, avoids the influence of water flow accumulation on subsequent filtration, and vice versa. When the conical plug 61 moves upward to increase the degree of traction on the water curtain, the connecting rod 744 is pulled upward synchronously, and the pulling force on the connecting rope 745 increases. The connecting rope 745 changes the direction of the force through the guide wheel 749, pulls the square sleeve 747 to slide to the left along the square rod 746 against the elastic force of the second spring 748. The rack 743 moves to the left with the square sleeve 747 and drives the gear 742 to rotate clockwise. The rotating shaft 73 drives the condensing plate 72 to rotate clockwise, increasing the inclination angle of the condensing plate 72. After the degree of traction increases, more dust-containing water mist is brought into the water tank 2 by the airflow, and the enlarged condensing plate 72 can fully capture the water mist to avoid condensation due to the increase in the amount of water mist, and ensure that the water mist is efficiently converted into liquid water flow.

[0048] During the tunnel cooling and dust removal process, when the dust concentration and temperature gradually decrease, but have not yet reached the threshold value that requires adjustment of the total power of the water pump 31 and the air blower 51, the PLC controller 10 will start fine adjustment: by increasing the current to the electrified block 66, the degree of traction of the suction hole 4 is slightly reduced to avoid excessive traction of the airflow under fixed power. At the same time, the inclination angle of the condensing plate 72 is reduced synchronously with the downward movement of the conical plug 61, and the contact area of the condensing plate 72 and the water mist is reduced. Without changing the total power of the core equipment, the degree of traction, the condensing efficiency and the current working condition can be matched through "small amplitude adaptation". On the premise of ensuring the basic dust removal and cooling effect, the invalid consumption of energy and water resources is minimized to achieve efficient and energy-saving operation of the device.

[0049] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A circulating water curtain tunnel cooling and dust removal device, comprising a support frame (1), characterized in that, Also includes: A return water tank (2) is fixedly installed at the bottom of the support (1). A spraying mechanism (3) is provided between the inside of the return water tank (2) and the top of the support (1). A plurality of evenly distributed suction holes (4) are opened on the top of the return water tank (2). A traction suction mechanism (5) is installed on the side wall of the return water tank (2), and the traction suction mechanism (5) is connected to the return water tank (2). Multiple traction force adjustment mechanisms (6) are respectively set inside the multiple suction holes (4), and the traction force adjustment mechanism (6) is self-adjusting according to dust concentration and temperature. The traction force adjustment mechanism (6) includes a frustum-shaped plug (61) located inside the suction hole (4). Slide plates (62) are fixedly provided on both sides of the bottom of the frustum-shaped plug (61). Slide rods (63) are provided inside the two slide plates (62). The upper ends of the two slide rods (63) are fixedly connected to the top inner wall of the return water tank (2), and the lower ends of the two slide rods (63) are fixedly provided with the same fixed plate (64). The rod walls of the two slide rods (63) are sleeved with a first spring (65), and the two ends of the first spring (65) are fixedly connected to the slide plate (62) and the return water tank (2) respectively. A magnet block (66) is fixedly provided on the top of the fixed plate (64), and a permanent magnet block (67) is fixedly provided on the bottom of the frustum-shaped plug (61). Multiple condensing mechanisms (7) are all located inside the return water tank (2), and the multiple condensing mechanisms (7) are respectively located below the multiple traction force adjustment mechanisms (6). The condensing mechanism (7) includes multiple evenly distributed partitions (71) fixedly disposed inside the return water tank (2). Multiple evenly distributed condensing plates (72) are provided between two adjacent partitions (71). The tops of the multiple condensing plates (72) are rotatably disposed inside the return water tank (2) through rotating shafts (73). One end of the multiple rotating shafts (73) extends to the outside of the return water tank (2) and is provided with a transmission mechanism (74) connected to the top of the frustum-shaped plug (61). The transmission mechanism (74) includes a fixed... A cover (741) is fixedly installed on the side wall of the return water tank (2). One end of each of the multiple rotating shafts (73) extends into the interior of the cover (741) and is fixedly provided with gears (742). A rack (743) is slidably provided inside the cover (741). The rack (743) meshes with the multiple gears (742). A connecting rod (744) is fixedly provided on the top of the frustum-shaped plug (61). A connecting rope (745) is fixedly provided at the end of the connecting rod (744) away from the frustum-shaped plug (61). The end of the connecting rope (745) away from the connecting rod (744) extends into the interior of the cover (741) and is connected to one side of the rack (743). Multiple filtration mechanisms (8) are all located inside the return water tank (2), and the multiple filtration mechanisms (8) are respectively located below the multiple condensation mechanisms (7); The sensor group (9) is fixedly installed on the side wall of the bracket (1). The side wall of the bracket (1) is fixedly equipped with a PLC controller (10). The spraying mechanism (3), the traction suction mechanism (5), the traction force adjustment mechanism (6), the condensation mechanism (7) and the sensor group (9) are all electrically connected to the PLC controller (10).

2. The circulating water curtain tunnel cooling and dust removal device according to claim 1, characterized in that, The spraying mechanism (3) includes a water pump (31) fixedly installed inside the return water tank (2). The output end of the water pump (31) is fixedly provided with a first water pipe (32) extending to the outside of the return water tank (2). The top of the bracket (1) is fixedly provided with a second water pipe (33), and both ends of the second water pipe (33) adopt a closed structure. The end of the first water pipe (32) away from the water pump (31) is fixedly connected to the pipe wall of the second water pipe (33). Multiple evenly distributed atomizing nozzles (34) are fixedly provided on the lower side of the pipe wall of the second water pipe (33).

3. The circulating water curtain tunnel cooling and dust removal device according to claim 1, characterized in that, The traction suction mechanism (5) includes a blower (51) fixedly installed on the side wall of the return water tank (2). The input end of the blower (51) is fixedly provided with a first exhaust pipe (52). The two ends of the first exhaust pipe (52) adopt a closed structure. The pipe wall of the first exhaust pipe (52) is fixedly provided with a plurality of evenly distributed second exhaust pipes (53). The end of the second exhaust pipe (53) away from the first exhaust pipe (52) is fixedly connected to the side wall of the return water tank (2).

4. The circulating water curtain tunnel cooling and dust removal device according to claim 1, characterized in that, A square rod (746) is fixedly mounted horizontally inside the cover (741). A square sleeve (747) is slidably mounted on the rod wall of the square rod (746). The side wall of the square sleeve (747) is fixedly connected to the side wall of the rack (743). A second spring (748) is mounted on one end of the square rod (746), and the two ends of the second spring (748) are fixedly connected to the square sleeve (747) and the cover (741) respectively. A guide wheel (749) is rotatably mounted inside the cover (741). One end of the connecting rope (745) passes through the guide wheel (749) and is fixedly connected to the top of the square sleeve (747).

5. The circulating water curtain tunnel cooling and dust removal device according to claim 1, characterized in that, The filtration mechanism (8) includes a filter plate (81) fixedly disposed between the bottoms of two adjacent partitions (71), and the filter plate (81) is fixedly connected to the inner side wall of the return water tank (2). A filter hole (82) is provided in the middle of the filter plate (81), and a fixing ring (83) is provided in the internal thread of the filter hole (82). A filter screen (84) is fixedly disposed inside the fixing ring (83). A sealing cover plate (85) is provided on the side wall of the return water tank (2) at a position corresponding to the position of the plurality of filter plates (81).

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