Dust falling device for coal receiving pit
By installing dust reduction devices with spray structures, protective plates and dust suppression structures in the coal-receiving pit, the pollution problem of coal dust during coal unloading is solved, and efficient dust reduction of dust in the coal-receiving pit is achieved, improving the working environment and reducing the working environment Environmental pollution.
Patent Information
- Application Number
- CN202420992724.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-09
AI Technical Summary
During the unloading process of coal in the coal-receiving pit, dust is formed due to friction and collision, resulting in environmental pollution and poor working environment.
Design a dust reduction device for coal pits, including spray structure, protective plate and dust suppression structure. The spray structure mixes the coal powder with the water mist by spraying water mist, and the mixture settles under gravity; the protective plate protects the spray structure; and the dust-repressing structure captures the rising coal powder through the retractable mesh plate.
It effectively reduces the dust concentration in the coal pit, improves the working environment, reduces environmental pollution, and improves dust reduction efficiency.
Smart Images
Figure CN222468481U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of dust removal, and in particular to a dust reduction device for a coal pit. Background Art
[0002] The receiving pit is an important facility for coal storage. It is responsible for receiving and unloading coal. During the unloading process, the raw coal stored in the receiving pit falls from the coal unloading port at the bottom of the receiving pit to the coal inlet of the coal feeder, and then is quantitatively, evenly and continuously transported to the conveyor belt in the underground belt corridor through the coal outlet of the coal feeder, and then transported to the next step for processing.
[0003] When the raw coal falls from the coal receiving pit to the coal inlet of the coal feeder, the coal flows rub and collide with each other due to the falling movement of the coal flow and the change of the stacking structure on the coal flow cross-section, resulting in smaller particles of coal powder being thrown into the air to form dust. These dusts will continue to float in the coal receiving pit and even continue to rise above the coal receiving pit, causing pollution to the environment around the coal receiving pit, thereby directly affecting the working environment and bringing harm to the health of employees. Utility Model Content
[0004] The present application provides a coal pit dust suppression device to solve the above-mentioned problems mentioned in the background technology.
[0005] The present application provides a dust suppression device for a coal receiving pit, comprising: a coal receiving pit, a spraying structure, and a protective plate. The coal receiving pit is in the shape of an inverted quadrangular prism that is wide at the top and narrow at the bottom.
[0006] The spraying structure includes a spraying water pipe, a water branch pipe, a water main pipe and a water storage tank. One end of the water main pipe is connected to the water storage tank through a water pump, and the other end of the water main pipe is connected to the middle part of the water branch pipe. A plurality of spraying water pipes are connected at equal intervals along the length direction of the water branch pipe. The plurality of spraying water pipes pass through the side wall of the coal receiving pit close to the water branch pipe and extend horizontally into the upper part of the coal receiving pit. One end of the spraying water pipe away from the water branch pipe is connected to the side wall of the coal receiving pit. A water spray hole is provided at the lower part of the spraying water pipe, and a water valve is provided on the water main pipe.
[0007] The protective plate is arranged above each water spraying pipe in the coal receiving pit, the length direction of the protective plate is parallel to the length direction of the water spraying pipe, and the two ends of the protective plate in the length direction are respectively connected to the side walls of the coal receiving pit.
[0008] Optionally, the cross section of the protective plate is an inverted V shape or an inverted U shape.
[0009] Optionally, two rows of water spray holes are symmetrically opened at the lower part of the spray pipe.
[0010] Optionally, the distance between the top of the water spray pipe and the top of the coal receiving pit is 1 / 4-1 / 3 of the height of the coal receiving pit.
[0011] Optionally, a coal feeder is connected to the bottom of the coal pit.
[0012] Optionally, a dust suppression structure is provided at the lower part of the spraying structure, and the dust suppression structure includes a retractable mesh plate, a fixed plate, a movable plate, a pull rod and a retractable cylinder.
[0013] One end of the retractable mesh plate along the retractable direction is connected to one side of the fixed plate, and the other side of the fixed plate is fixedly connected to the side wall of the coal pit. The other end of the retractable mesh plate along the retractable direction is connected to one side of the movable plate, and the other side of the movable plate is connected to one end of the pull rod. The end of the pull rod away from the movable plate is connected to the telescopic end of the telescopic cylinder. The telescopic cylinder is located outside the side wall of the coal pit opposite to the fixed plate.
[0014] Optionally, the dust suppression device is further provided with an air mixing structure, which includes a fan, a fan main pipe, an air inlet pipe and an air injection pipe.
[0015] The output end of the fan is connected to one end of the fan main pipe, the other end of the fan main pipe is connected to the middle of the air inlet pipe, and the air inlet pipe is connected with an air spray pipe at equal distances in the length direction. The end of the air spray pipe away from the air inlet pipe is connected to the end of the spray water pipe close to the water distribution pipe.
[0016] Optionally, the dust suppression device is further provided with a controller, which is respectively connected to the coal feeder, the water valve, the water pump, the telescopic cylinder and the fan.
[0017] The coal receiving pit dust reduction device provided in the present application realizes efficient dust reduction when unloading coal in the coal receiving pit, and has the following beneficial effects compared with the prior art:
[0018] (1) By setting up a spraying structure, water mist is sprayed into the interior of the coal pit, so that the coal powder and the water mist are mixed. The weight and volume of the mixture of coal powder and water mist are constantly increasing, and finally settle under the action of its own gravity, which plays a role in dust reduction. The spraying structure includes a spraying water pipe, a water distribution pipe, a water main pipe and a water storage tank. A water spray hole is opened at the lower part of the spraying water pipe. The spray water is sprayed from the water spray hole in the form of mist toward the dust source, so that the coal powder and the mist water droplets contact and mix with each other. The weight and volume of the mixture of coal powder and water mist are constantly increasing, and finally settle under the action of its own gravity, achieving the purpose of dust reduction inside the coal pit. The water delivery pump improves the mixing efficiency of water mist and coal powder, which is conducive to the rapid increase of the mass and volume of the mixture of coal powder and water mist, accelerates the falling speed of dust, and thus improves the dust reduction efficiency of the coal pit. By setting up a protective plate, the spraying structure is protected to avoid damage to the spraying structure caused by the impact of coal powder on the spraying structure when coal enters from the top of the coal pit, which is conducive to the long-term use of the spraying structure.
[0019] (2) By setting up a dust suppression structure, the coal dust in the receiving coal pit is further suppressed. The dust suppression structure can be a retractable mesh plate, a fixed plate, a movable plate, a pull rod and a retractable cylinder. The retractable mesh plate is formed into a mesh structure on the cross section of the receiving coal pit through the retractable cylinder, so that a part of the coal dust falls due to the collision with the retractable mesh plate. At the same time, the water mist from the spraying structure that is not mixed with the coal dust gathers on the retractable mesh plate, contacts, mixes and gathers with the rising coal dust, and finally sinks under the action of gravity, thereby improving the dust suppression efficiency of the receiving coal pit.
[0020] (3) By setting up a mixed air structure, when the spray water is sprayed from the water spray hole, the fast-flowing water mist and wind are sprayed at the same time, which can not only cover the coal powder, but also produce a downward impact on the coal powder, reducing the kinetic energy of the coal powder moving upward. The water mist and coal powder are mixed, gathered and then sink. The sprayed water mist and wind work together to improve the dust reduction efficiency of the coal pit. It also reduces the amount of water used and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0022] Figure 1 A schematic diagram of the structure of a coal pit dust suppression device provided in one embodiment of the present application;
[0023] Figure 2 A schematic diagram of the structure of a spray water pipe and a protective plate provided in one embodiment of the present application;
[0024] Figure 3 A schematic diagram of the structure of a dust suppression structure provided in one embodiment of the present application;
[0025] Figure 4 A schematic structural diagram of a coal pit dust suppression device provided in another embodiment of the present application;
[0026] Figure 5 A connection diagram of a controller provided in one embodiment of the present application;
[0027] Description of reference numerals:
[0028] 1: coal pit, 3: protective plate, 4: coal feeder, 5: dust suppression structure, 7: controller, 210: water spray pipe, 211: water spray hole, 220: water distribution pipe, 230: water main pipe, 231: water valve, 240: water storage tank, 250: water pump, 510: retractable mesh plate, 520: fixed plate, 530: movable plate, 540: pull rod, 550: retractable cylinder, 610: fan, 620: fan main pipe, 630: air inlet pipe, 640: air spray pipe. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.
[0030] like Figure 1 As shown, the present application provides a coal pit dust reduction device, comprising: a coal pit 1, a spraying structure, and a protective plate 3, wherein the coal pit 1 is in the shape of an inverted quadrangular prism that is wide at the top and narrow at the bottom.
[0031] The spraying structure includes a spraying water pipe 210, a water branch pipe 220, a water main pipe 230 and a water storage tank 240. One end of the water main pipe 230 is connected to the water storage tank 240 through a water pump 250, and the other end of the water main pipe 230 is connected to the middle part of the water branch pipe 220. A plurality of spraying water pipes 210 are connected at equal intervals along the length direction of the water branch pipe 220. The plurality of spraying water pipes 210 pass through the side wall of the coal receiving pit 1 close to the water branch pipe 220 and extend horizontally into the upper part of the coal receiving pit 1, and one end of the spraying water pipe 210 away from the water branch pipe 220 is connected to the side wall of the coal receiving pit 1, a water spray hole 211 is opened at the lower part of the spraying water pipe 210, and a water valve 231 is arranged on the water main pipe 230.
[0032] The protective plate 3 is arranged above each spraying water pipe 210 located in the coal pit 1. The length direction of the protective plate 3 is parallel to the length direction of the spraying water pipe 210, and the two ends of the length direction of the protective plate 3 are respectively connected to the side walls of the coal pit 1.
[0033] Specifically, when the raw coal is unloaded from the bottom of the coal receiving pit 1, the falling of the raw coal causes the stacking structure to change. At the same time, the collision and friction of the coal flow cause dust to be generated at the bottom of the coal receiving pit 1. The dust is reduced by the coal receiving pit dust reduction device provided in this application to avoid dust pollution to the environment.
[0034] The spraying structure is used to spray water mist into the coal pit 1. Dust is scattered in the coal pit 1 and rises continuously. The flying coal powder collides, intercepts and condenses with the water mist sprayed by the spraying structure, so that the coal powder and the water mist are mixed. The weight and volume of the mixture of coal powder and water mist are continuously increased, and finally settle under the action of its own gravity, playing a role in dust reduction. The protective plate 3 is used to protect the spraying structure to prevent the impact of coal powder on the spraying structure when coal is fed from the top of the coal pit 1, which is conducive to the long-term use of the spraying structure.
[0035] The spraying structure includes a spraying water pipe 210, a water branch pipe 220, a water main pipe 230 and a water storage tank 240. The water in the water storage tank 240 is pumped into the water main pipe 230 by a water pump 250. The spraying water passes through the water main pipe 230 and the water branch pipe 220 to the spraying water pipe 210 in sequence. A water spray hole 211 is opened at the lower part of the spraying water pipe 210. The spraying water is sprayed toward the dust source in a mist form from the water spray hole 211, so that the coal powder and the mist water droplets contact and mix with each other. The weight and volume of the mixture of coal powder and water mist continue to increase, and finally settles under the action of its own gravity, thereby achieving the purpose of dust reduction inside the coal pit 1. At the same time, the water pump 250 provides power, so that the spray water has a certain kinetic energy after entering the spray water pipe 210, and then the water mist sprayed from the water spray hole 211 has a certain pressure, which has a downward thrust on the scattered coal powder, so that the coal powder moves downward, further improving the dust suppression efficiency, and also making the water mist have kinetic energy after being sprayed, improving the mixing efficiency of water mist and coal powder, which is conducive to the rapid increase of the mass and volume of the mixture of coal powder and water mist, accelerating the falling speed of dust, and thus improving the dust reduction efficiency of the coal pit 1. According to the amount of coal powder, the opening of the water valve 231 can be adjusted to adjust the amount of water entering the spray water pipe 210, which not only achieves the purpose of dust reduction, but also can reduce the opening of the water valve 231 when the amount of coal powder is small, saving water resources, and thus saving production costs.
[0036] The top of the coal receiving pit 1 is used for feeding coal, and a grate is provided on the top of the coal receiving pit 1 for screening large pieces of raw coal when feeding coal, so that small particles of raw coal enter the coal receiving pit 1. Therefore, a protective plate 3 is provided above each spraying water pipe 210 located in the coal receiving pit 1 to protect the spraying water pipe 210, to avoid the collision of coal powder with the spraying water pipe 210 when feeding coal, to avoid damage to the spraying water pipe 210, and to facilitate the long-term use of the spraying structure. The two ends of the protective plate 3 in the length direction are respectively connected to the side walls of the coal receiving pit 1, and are used to fix the protective plate 3.
[0037] The present application realizes efficient dust reduction when unloading coal in the coal receiving pit through the above scheme. By setting a spraying structure, water mist is sprayed into the coal receiving pit, so that the coal powder is mixed with the water mist. The weight and volume of the mixture of coal powder and water mist are constantly increasing, and finally settle under the action of its own gravity, which plays a role in dust reduction. The spraying structure includes a spraying water pipe, a water distribution pipe, a water main pipe and a water storage tank. The lower part of the spraying water pipe is provided with a water spray hole. The spray water is sprayed from the water spray hole in a mist form toward the dust source, so that the coal powder and the mist water droplets contact and mix with each other. The weight and volume of the mixture of coal powder and water mist are constantly increasing, and finally settle under the action of its own gravity, achieving the purpose of dust reduction inside the coal receiving pit. The water delivery pump improves the mixing efficiency of water mist and coal powder, which is conducive to the rapid increase of the mass and volume of the mixture of coal powder and water mist, accelerates the falling speed of dust, and thus improves the dust reduction efficiency of the coal receiving pit. By setting up a protective plate, the spraying structure is protected to avoid damage to the spraying structure caused by the impact of coal powder on the spraying structure when coal enters from the top of the coal pit, which is conducive to the long-term use of the spraying structure.
[0038] like Figure 2 As shown, optionally, the cross section of the protection plate 3 is an inverted V shape or an inverted U shape.
[0039] Specifically, the arrangement of being high in the middle and low on both sides makes it convenient for the coal powder that falls on the protective plate 3 to fall smoothly into the coal receiving pit 1 when coal is fed in, thereby preventing the coal powder from falling on the protective plate 3 when coal is fed in, which is beneficial to reducing the pressure of the coal powder on the protective plate 3, and further helps to improve the stability of the protective plate 3.
[0040] Furthermore, the bottom of both side edges of the protective plate 3 is lower than the center position of the spray pipe 210 and higher than the position of the water spray hole 211, so that the spray pipe 210 can be protected to the greatest extent without affecting the water mist sprayed from the water spray hole 211.
[0041] like Figure 2 As shown, optionally, two rows of water spray holes 211 are symmetrically opened at the lower part of the spray water pipe 210.
[0042] Specifically, the arrangement of two rows of water spray holes 211 allows the water mist to be sprayed in a fan shape, thereby increasing the coverage area of the coal powder by the water mist sprayed from the water spray holes 211, thereby improving the mixing efficiency of the water mist and the coal powder, and greatly reducing the time taken for the coal powder to fall with the water mist, thereby improving the dust reduction efficiency in the coal pit 1.
[0043] Optionally, the distance between the top of the water spray pipe 210 and the top of the coal receiving pit 1 is 1 / 4-1 / 3 of the height of the coal receiving pit 1 .
[0044] Specifically, such an arrangement enables the spraying water pipe 210 to be located in the upper part of the coal receiving pit 1 , which not only achieves dust reduction in the coal receiving pit 1 , but also does not affect the amount of coal contained in the coal receiving pit 1 .
[0045] Optionally, a coal feeder 4 is connected to the bottom of the coal pit 1 .
[0046] Specifically, the coal feeder 4 is used to discharge the raw coal in the coal receiving pit 1 through the bottom outlet of the coal receiving pit 1, and then transport it to the conveyor belt in the belt corridor to be transported to the next step for processing, such as the coal washing step.
[0047] like Figure 3 As shown, optionally, a dust suppression structure 5 is provided at the lower part of the spraying structure, and the dust suppression structure 5 includes a retractable mesh plate 510 , a fixed plate 520 , a movable plate 530 , a pull rod 540 and a retractable cylinder 550 .
[0048] One end of the retractable mesh plate 510 along the retractable direction is connected to one side of the fixed plate 520, and the other side of the fixed plate 520 is fixedly connected to the side wall of the coal pit 1. The other end of the retractable mesh plate 510 along the retractable direction is connected to one side of the movable plate 530, and the other side of the movable plate 530 is connected to one end of the pull rod 540. The end of the pull rod 540 away from the movable plate 530 is connected to the retractable end of the telescopic cylinder 550. The telescopic cylinder 550 is located outside the side wall of the coal pit 1 opposite to the fixed plate 520.
[0049] Specifically, the dust suppression structure 5 is used to further suppress the coal dust in the coal pit 1. The retractable mesh plate 510 forms a mesh structure when stretched, which can block and capture the rising coal dust, and realize preliminary dust reduction of the coal dust before the spraying structure. The fixed plate 520 is fixedly connected to the side wall of the coal pit 1, and is used to fix one end of the retractable mesh plate 510 along the telescopic direction to the side wall of the coal pit 1. The movable plate 530 is connected to the other end of the retractable mesh plate 510, and the other end of the movable plate 530 is connected to the pull rod 540 and the telescopic cylinder 550 in sequence. The telescopic cylinder 550 drives the pull rod 540 to move horizontally, and the pull rod 540 drives the movable plate 530 to move, thereby making the retractable mesh plate 510 expand and retract.
[0050] When dust reduction is required for the coal pit 1, the telescopic cylinder 550 is opened and contracted, driving the movable plate 530 to move away from the fixed plate 520, and the movable plate 530 drives the telescopic mesh plate 510 to expand, so that the telescopic mesh plate 510 forms a mesh structure on the cross section of the coal pit 1. Such a mesh structure can collide with the rising coal powder, reduce the kinetic energy of the coal powder, and then cause a part of the coal powder to fall due to the collision. At the same time, the water mist from the spraying structure that is not mixed with the coal powder gathers on the telescopic mesh plate 510, contacts, mixes, and gathers with the rising coal powder, and finally sinks under the action of gravity, realizing preliminary dust reduction of the coal powder before the spraying structure.
[0051] The other part of the coal powder continues to rise, combines with the water mist sprayed by the upper spray structure, forms a mixture of coal powder and water mist, and descends. During the descent, it gathers and increases weight on the retractable mesh plate 510, and finally sinks, reducing the time for the mixture of coal powder and water mist to sink, and also reducing the amount of the mixture of coal powder and water mist floating in the air, thereby improving the dust reduction efficiency of the coal pit 1. After the coal unloading is completed, the telescopic cylinder 550 is turned on and extended, so that the movable plate 530 moves in the direction close to the fixed plate 520, thereby driving the retractable mesh plate 510 to retract. The dust suppression structure 5 is retractable, which avoids the influence of the retractable mesh plate 510 on the coal entering the coal pit 1 when the coal unloading is not in progress, so that the coal entering and unloading of the coal pit 1 do not affect each other, and improves the convenience of the coal pit 1.
[0052] like Figure 4 As shown, optionally, the dust suppression device is further provided with an air mixing structure, which includes a fan 610, a fan main pipe 620, an air inlet pipe 630 and an air injection pipe 640.
[0053] The output end of the fan 610 is connected to one end of the fan main pipe 620, the other end of the fan main pipe 620 is connected to the middle of the air inlet pipe 630, and the air inlet pipe 630 is connected to the spray pipe 640 at equal distances in the length direction. The end of the spray pipe 640 away from the air inlet pipe 630 is connected to the end of the spray water pipe 210 close to the water distribution pipe 220.
[0054] Specifically, the fan 610 is used to blow air into the fan main pipe 620, and then enter the air injection pipe 640 through the air inlet pipe 630. The air is ejected from the outlet of the air injection pipe 640 and mixed with the water in the spray water pipe 210. When the spray water is ejected from the water injection hole 211, the fast-flowing water mist and the wind are ejected at the same time, which can not only cover the coal powder, but also produce a downward impact on the coal powder, reducing the kinetic energy of the coal powder moving upward, and the water mist and the coal powder are mixed, gathered and then sink, and the ejected water mist and the wind work together to improve the dust reduction efficiency of the coal pit 1. It also reduces the amount of water used and reduces the production cost.
[0055] like Figure 5 As shown, optionally, the dust suppression device is further provided with a controller 7, and the controller 7 is respectively connected to the coal feeder 4, the water valve 231, the water pump 250, the telescopic cylinder 550 and the fan 610.
[0056] Specifically, the controller 7 is used to start and stop the coal feeder 4, the water valve 231, the water pump 250, the telescopic cylinder 550 and the fan 610. At the same time, according to the amount of coal powder, the opening of the water valve 231, the frequency of the water pump 250 and the fan 610 are adjusted, thereby improving the degree of automation of the dust reduction device.
[0057] The technical solution of the present application is described in detail below with reference to specific embodiments.
[0058] The operation flow of the coal pit dust suppression device in this embodiment during specific operation is as follows:
[0059] When the coal in the receiving pit 1 is unloaded, the raw coal is unloaded to the coal feeder 4 through the bottom outlet of the receiving pit 1, and then transported to the conveyor belt in the belt corridor through the coal feeder 4 to the next step for processing. In this process, coal powder will continuously be generated at the bottom outlet of the receiving pit 1, and the coal powder will continue to rise. The dust is reduced by the dust reduction device for the receiving pit provided by the present application to avoid dust pollution to the environment.
[0060] The controller 7 starts the telescopic cylinder 550 to contract, driving the movable plate 530 to move away from the fixed plate 520, and the movable plate 530 drives the telescopic mesh plate 510 to expand, so that the telescopic mesh plate 510 forms a mesh structure on the cross section of the coal pit 1. At the same time, the controller 7 starts the water valve 231, the water pump 250 and the fan 610, and finally starts the coal feeder 4.
[0061] The water in the water storage tank 240 is pumped into the water main pipe 230 by the water delivery pump 250, and the spraying water passes through the water main pipe 230 and the water distribution pipe 220 to the spraying water pipe 210 in turn. The fan 610 blows air into the fan main pipe 620, and then enters the spray pipe 640 through the air inlet pipe 630. The air is sprayed out of the outlet of the spray pipe 640 and mixed with the water in the spraying water pipe 210. When the spraying water is sprayed out from the water spray hole 211, the fast-flowing water mist and the wind are sprayed out at the same time, so that the coal powder and the mist water droplets contact and mix with each other, and the weight and volume of the mixture of coal powder and water mist are constantly increasing. At the same time, the fast-flowing water mist and the wind are sprayed out at the same time, covering the top of the coal powder, and at the same time producing a downward impact on the coal powder, reducing the kinetic energy of the coal powder moving upward, and the water mist and the coal powder are mixed, gathered and then sink, and the sprayed water mist and the wind work together to achieve the purpose of dust reduction inside the coal pit 1. At the same time, when the coal powder passes through the dust suppression structure 5, the retractable mesh plate 510 forms a mesh structure on the cross section of the coal pit 1, causing a portion of the coal powder to fall due to collision. At the same time, the water mist from the spraying structure that is not mixed with the coal powder gathers on the retractable mesh plate 510, contacts, mixes, and gathers with the rising coal powder, and finally sinks under the action of gravity, thereby improving the dust reduction efficiency of the coal pit 1. During the dust reduction process, the opening of the water valve 231, the frequency of the water pump 250 and the fan 610 are adjusted according to the amount of coal powder.
[0062] After the coal unloading is completed, the controller 7 first turns off the coal feeder 4 to stop the generation of coal powder, and then turns off the telescopic cylinder 550, the fan 610, the water pump 250 and the water valve 231, so that the dust suppression device in the coal pit stops working.
[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A dust suppression device for a coal pit, characterized in that: include: A coal receiving pit (1), a spraying structure, and a protective plate (3), wherein the coal receiving pit (1) is in the shape of an inverted quadrangular prism that is wide at the top and narrow at the bottom; The spraying structure comprises a spraying water pipe (210), a water distribution pipe (220), a water main pipe (230) and a water storage tank (240); one end of the water main pipe (230) is connected to the water storage tank (240) via a water pump (250); the other end of the water main pipe (230) is connected to the middle of the water distribution pipe (220); and a plurality of spraying water pipes (210) are connected to the water distribution pipe (220) at equal intervals in the length direction. ), a plurality of the spraying water pipes (210) pass through the side wall of the coal receiving pit (1) close to the water distribution pipe (220) and extend horizontally into the upper part of the coal receiving pit (1), and one end of the spraying water pipe (210) away from the water distribution pipe (220) is connected to the side wall of the coal receiving pit (1), a water spray hole (211) is provided at the lower part of the spraying water pipe (210), and a water valve (231) is provided on the water main pipe (230); The protective plate (3) is arranged above each of the spraying water pipes (210) located in the coal receiving pit (1), the length direction of the protective plate (3) is parallel to the length direction of the spraying water pipe (210), and both ends of the length direction of the protective plate (3) are respectively connected to the side walls of the coal receiving pit (1).
2. The coal pit dust suppression device according to claim 1, characterized in that: The cross section of the protection plate (3) is in an inverted V shape or an inverted U shape.
3. The dust suppression device for coal pit according to claim 1, characterized in that: The lower part of the spray water pipe (210) is provided with two rows of spray holes (211) symmetrically on the left and right.
4. The dust suppression device for coal pit according to claim 1, characterized in that: The distance between the top of the water spraying pipe (210) and the top of the coal receiving pit (1) is 1 / 4-1 / 3 of the height of the coal receiving pit (1).
5. The coal pit dust suppression device according to any one of claims 1 to 4, characterized in that: The bottom of the coal receiving pit (1) is connected to a coal feeder (4).
6. The dust suppression device for coal pit according to claim 5, characterized in that: A dust suppression structure (5) is provided at the lower part of the spraying structure, and the dust suppression structure (5) comprises a retractable mesh plate (510), a fixed plate (520), a movable plate (530), a pull rod (540) and a retractable cylinder (550); One end of the retractable mesh plate (510) along the retractable direction is connected to one side of the fixed plate (520), and the other side of the fixed plate (520) is fixedly connected to the side wall of the coal receiving pit (1). The other end of the retractable mesh plate (510) along the retractable direction is connected to one side of the movable plate (530), and the other side of the movable plate (530) is connected to one end of the pull rod (540). The end of the pull rod (540) away from the movable plate (530) is connected to the retractable end of the retractable cylinder (550), and the retractable cylinder (550) is located outside the side wall of the coal receiving pit (1) opposite to the fixed plate (520).
7. The dust suppression device for coal pit according to claim 6, characterized in that: The dust suppression device is also provided with an air mixing structure, which includes a fan (610), a fan main pipe (620), an air inlet pipe (630) and an air injection pipe (640); The output end of the fan (610) is connected to one end of the fan main pipe (620), and the other end of the fan main pipe (620) is connected to the middle of the air inlet pipe (630). The air inlet pipe (630) is connected to the air spray pipe (640) at equal distances in the length direction, and the end of the air spray pipe (640) away from the air inlet pipe (630) is connected to the end of the water spray pipe (210) close to the water distribution pipe (220).
8. The dust suppression device for coal pit according to claim 7, characterized in that: The dust suppression device is also provided with a controller (7), and the controller (7) is respectively connected to the coal feeder (4), the water valve (231), the water delivery pump (250), the telescopic cylinder (550) and the fan (610).