Dustproof bin for discharge pit

Abstract

The utility model discloses a dustproof bin for unloading pit, include: pit, dustproof bin is surrounded and is set in the four around of pit, is sealed to be provided with the air suction cover at the top of dustproof bin, is connected with the connecting pipe on the air suction cover, and the connecting pipe is linked with the air extraction dust catcher, and is provided with the soft curtain sliding door at the left and right two ends of import and export, is provided with the rolling shutter door on the dustproof bin. The utility model has the advantages of: when unloading, the two soft curtain sliding doors of dustproof bin import and export two sides can abut on the two side walls of closed bulk grain car, and the rolling shutter door can drop to the car hopper of closed bulk grain car, and the dust produced in unloading can be blocked in the dustproof bin through the blocking of soft curtain sliding door and rolling shutter door, then the dust in the dustproof bin is extracted through the air extraction dust catcher.

Description

Technical Field

[0001] This utility model relates to the field of unloading dust removal, and in particular to a dustproof bin for unloading pits. Background Technology

[0002] In bulk grain operations, bulk granular raw grains need to be unloaded, transshipped, stored, and transported at the port. During unloading, enclosed bulk grain trucks are used to unload the raw grains into unloading pits. Conveyor belts are installed in these pits to transfer the raw grains to storage equipment. When secondary transfer is required, the raw grains are reloaded from the storage equipment into enclosed bulk grain trucks for transport. Throughout the bulk grain operation, the unloading of raw grains from the enclosed trucks into the unloading pits generates significant dust. Currently, most unloading pits on the market are semi-open, serving only as rain protection and not dust suppression. Therefore, each unloading operation raises a large amount of dust, easily polluting the environment and affecting the health of workers. Utility Model Content

[0003] The purpose of this invention is to provide a dustproof bin for the unloading pit of a closed bulk grain truck that prevents dust from spreading out during unloading.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a dustproof bin for an unloading pit, comprising: a pit, the dustproof bin surrounding the pit, a suction hood sealed on the top of the dustproof bin, a connecting pipe connected to the suction hood, the connecting pipe connected to a dust collector, and soft curtain sliding doors provided at both the left and right ends of the inlet and outlet. Each soft curtain sliding door comprises: a soft curtain, the fixed end of which is sealed and fixed to the side wall of the dustproof bin; several sliding rods evenly distributed on the soft curtain, one of which is fixed to the moving end of the soft curtain; a guide wheel provided at the upper and lower ends of the sliding rod; and a guide groove plate provided at the upper and lower ends of the inlet and outlet. The two guide wheels on the sliding rod are respectively rolled and engaged in the two guide groove plates. The sliding rod located at the moving end of the soft curtain is horizontally... A rack plate is connected to the dustproof chamber. Support frames are respectively installed on the left and right side walls. A first servo reduction motor and guide sleeve are installed on the support frame. A gear is installed on the first servo reduction motor. The rack plate is slidably locked in the guide sleeve on the corresponding side and meshes with the gear on the same side. Non-contact sensors are installed on both soft curtain sliding doors. The two non-contact sensors are electrically connected to the servo reduction motors on their respective sides. A roller shutter door is installed on the dustproof chamber. The roller shutter door includes: a roller shutter, which is wound on a rotating shaft. The rotating shaft is rotatably set at the upper end of the inlet and outlet and connected to the driven sprocket. A second servo reduction motor is installed on the dustproof chamber. A drive sprocket is installed on the second servo reduction motor. A transmission chain is connected between the drive sprocket and the driven sprocket.

[0005] Furthermore, in the aforementioned dustproof bin for the unloading pit, a counterweight bar is sewn and wrapped around the lower end of the roller shutter, and a stop bar is provided below the rotating shaft, with the roller shutter passing through the gap between the stop bar and the rotating shaft.

[0006] Furthermore, in the aforementioned dustproof bin for the unloading pit, an upper limit sensor and a lower limit sensor are installed on the baffle. Both the upper limit sensor and the lower limit sensor are connected to the second servo reduction motor. An upper limit aluminum film that can be sensed by the upper limit sensor is installed at the lower end of the roller shutter, and a lower limit aluminum film that can be sensed by the lower limit sensor is installed at the upper end of the roller shutter.

[0007] Furthermore, in the aforementioned dustproof bin for the unloading pit, several air suction holes are provided on both the left and right side walls of the dustproof bin, and several air suction pipes are installed on the left and right side walls of the dustproof bin respectively. Each air suction pipe corresponds to one air suction hole, and the air suction pipes on the same side are connected to the same branch pipe. The two branch pipes on both sides of the dustproof bin are connected, and one of the branch pipes is connected to the connecting pipe.

[0008] Furthermore, in the aforementioned dustproof bin for the unloading pit, the non-contact sensor includes a laser rangefinder and an ultrasonic rangefinder. Both the laser rangefinder and the ultrasonic rangefinder are mounted on a sliding rod located at the moving end of the soft curtain. Both the laser rangefinder and the ultrasonic rangefinder are electrically connected to the first servo reduction motor on the corresponding side. A contact sensor is mounted on the sliding rod located at the moving end of the soft curtain. The contact end of the contact sensor extends out of the soft curtain sliding door. The contact sensor is electrically connected to the first servo reduction motor on the corresponding side.

[0009] Furthermore, in the aforementioned dustproof bin for the unloading pit, a wheel stop is provided on the outer wall of the guide trough plate located at the lower end of the inlet and outlet.

[0010] Furthermore, in the aforementioned dustproof bin for the unloading pit, limit switches are installed at both ends of the guide trough plates located at the upper end of the inlet and outlet.

[0011] Furthermore, in the aforementioned dustproof bin for the unloading pit, several reinforcing rods are inclinedly arranged between the moving rod located at the moving end of the soft curtain and the rack plate on the same side.

[0012] The advantages of this utility model are as follows: during unloading, the two soft curtains on both sides of the dustproof bin inlet and outlet can abut against the side walls of the enclosed bulk grain truck, while the roller shutter can descend onto the truck bed of the enclosed bulk grain truck. The dust generated during unloading can be blocked in the dustproof bin by the soft curtains and the roller shutter, and then the dust in the dustproof bin can be drawn away by the exhaust dust collector. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure of the dustproof bin for the unloading pit described in this utility model.

[0014] Figure 2 yes Figure 1 A schematic diagram of the structure when the soft curtain is fully opened.

[0015] Figure 3 This is a schematic diagram showing the structure of a closed bulk grain truck when unloading, with soft curtains and roller shutters covering the entrance and exit.

[0016] Figure 4 yes Figure 3 A schematic diagram of the structure from the side view. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0018] like Figures 1-4 As shown, the dustproof bin for unloading pit of this utility model includes: a pit 1, a dustproof bin 2 surrounding the pit 1, an inlet and outlet on the dustproof bin 2, a suction hood 21 sealed on the top of the dustproof bin 2, a connecting pipe 22 connected to the suction hood 21, the connecting pipe 22 being connected to an exhaust dust collector (existing technology, not shown in the figure), several suction holes on the left and right side walls of the dustproof bin 2, several suction pipes 23 installed on the left and right side walls of the dustproof bin 2 respectively, each suction pipe 23 corresponding to a suction hole, suction pipes 23 on the same side being connected to the same branch pipe 24, two branch pipes 24 on both sides of the dustproof bin 2 being connected, one of the branch pipes 24 being connected to the connecting pipe 22. After the exhaust dust collector is turned on, the air in the dust chamber 2 will be drawn away, and the dust generated during unloading will be drawn away. The dust will enter the branch pipe 24 and the connecting pipe 22 through the suction pipe 23 and the suction hood 21 respectively, and finally enter the exhaust dust collector for filtration. The dust will be captured and deposited by the fiber layer on the surface of the filter bag of the exhaust dust collector, while the air that has been filtered clean by the filter bag will be discharged.

[0019] Flexible sliding doors are installed at both the left and right ends of the inlet and outlet. Each flexible sliding door includes a flexible curtain 3, the fixed end of which is sealed and fixed to the side wall of the dustproof chamber 2. Several sliding rods 31 are evenly distributed on the flexible curtain 3, with one rod 31 fixed to the moving end of the curtain 3. A guide wheel 311 is installed at the upper and lower ends of each sliding rod 31. A guide groove plate 25 is installed at the upper and lower ends of each inlet and outlet. The two guide wheels 311 on the sliding rod 31 are respectively rolled and engaged in the two guide groove plates 25. The guide groove is located at the lower end of the inlet and outlet. A wheel stopper 26 is provided on the outer wall of the plate 25. A limit stop 251 is provided at both ends of the guide trough plate 25 located at the upper end of the inlet and outlet. A rack plate 32 is horizontally connected to the moving rod 31 located at the moving end of the soft curtain 3. Several reinforcing rods 321 are inclinedly arranged between the rack plate 32 and the moving rod 31. Support frames 27 are respectively provided on the left and right side walls of the dustproof chamber 2. A first servo reduction motor 33 and a guide sleeve 34 are provided on the support frame 27. Gears and racks are provided on the first servo reduction motor 33. Plate 32 is slidably engaged in the guide sleeve 34 on the corresponding side and meshes with the gear on the same side. A non-contact sensor is installed on the moving rod 31 at the moving end of the soft curtain 3. The non-contact sensor includes a laser rangefinder 35 and an ultrasonic rangefinder 36. Both the laser rangefinder 35 and the ultrasonic rangefinder 36 are electrically connected to the first servo reduction motor 33 on the corresponding side. The laser rangefinder 35 and the ultrasonic rangefinder 36 provide redundancy and complementarity. The laser rangefinder 35 has high accuracy but is easily affected by dust, while the ultrasonic rangefinder 36... Although the acoustic rangefinder 36 has poor accuracy, it is not affected by dust. Therefore, the combination of the two can ensure high measurement accuracy without being affected by dust. A contact sensor 37 is also provided on the moving rod 31 at the moving end of the soft curtain 3. The contact end of the contact sensor 37 extends out of the soft curtain 3. The contact sensor 37 is electrically connected to the first servo reduction motor 33 on the corresponding side. When the laser rangefinder 35 and the ultrasonic rangefinder 36 fail at the same time, the contact sensor 37 can play a supplementary limiting role.The first servo reduction motor 33 drives the gear to rotate, causing the rack plate 32 to move left and right. The rack plate 32 drives the moving rod 31 of the moving end of the soft curtain 3 to move left and right. When the soft curtain 3 is opened, the moving rod 31 of the moving end of the soft curtain 3 will push the other moving rods 31 to move together. When the moving rod 31 near the fixed end of the soft curtain 3 abuts against the limit switch 251, it means that the soft curtain 3 is opened to the limit and cannot be opened further. When both soft curtains 3 are opened to the limit, the inlet and outlet are open, and the enclosed bulk grain truck 5 can reverse into the dustproof bin 2. When the rear wheels of the enclosed bulk grain truck 5 abut against the wheel stop 26, it means that the enclosed bulk grain truck 5 is reversed. Once the vehicle is in position and no longer reverses, the first servo reduction motor 33 drives the rack plate 32 to close the soft curtain 3. The laser rangefinder 35 and ultrasonic rangefinder 36 on the two soft curtain sliding doors simultaneously monitor the distance between the soft curtain 3 and the enclosed bulk grain truck 5. When the laser rangefinder 35 and ultrasonic rangefinder 36 detect a distance of 0 between the soft curtain 3 and the enclosed bulk grain truck 5, it indicates that the soft curtain 3 is against the side wall of the enclosed bulk grain truck 5. At this time, the two soft curtains 3 respectively block the side walls of the enclosed bulk grain truck 5, and the contact ends on the two contact sensors 37 also abut against the side walls of the enclosed bulk grain truck 5. When it is necessary to close the entrance / exit, the two soft curtains 3 are closed together; the contact ends of the two contact sensors 37 coming into contact indicates that the two soft curtains 3 are closed.

[0020] A roller shutter door is installed on the dustproof chamber 2. The roller shutter door includes a roller shutter 4, which is wound around a rotating shaft 41. The rotating shaft 41 is rotatably located at the upper end of the inlet and outlet and connected to a driven sprocket 42. A second servo reduction motor 43 is installed on the dustproof chamber 2. A drive sprocket is installed on the second servo reduction motor 43. A transmission chain 44 is connected between the drive sprocket and the driven sprocket 42. A counterweight rod 45 is sewn and wrapped around the lower end of the roller shutter 4. The counterweight rod 45 enables the roller shutter 4 to straighten under the action of gravity. A stop bar 46 is provided below the rotating shaft 41. The roller shutter 4 passes through the gap between the stop bar 46 and the rotating shaft 41. An upper limit sensor 461 and a lower limit sensor 462 are provided on the stop bar 46. Both the upper limit sensor 461 and the lower limit sensor 462 are connected to the second servo reduction motor 43. An upper limit aluminum film 47 that can be sensed by the upper limit sensor 461 is provided at the lower end of the roller shutter 4. A lower limit aluminum film 48 that can be sensed by the lower limit sensor 462 is provided at the upper end of the roller shutter 4. During the closing process of the two soft curtains 3, the second servo reduction motor 43 drives the rotating shaft 41 to release the roller shutter 4, causing the roller shutter 4 to descend. When the lower limit aluminum film 48 on the roller shutter 4 is sensed by the lower limit sensor 462, it indicates that the roller shutter 4 has descended to the correct position. At this time, the roller shutter 4 is against the bucket of the enclosed bulk grain truck 5 and is not fully straightened. The enclosed bulk grain truck 5 tilts the bucket to unload the material. Since the roller shutter 4 is not fully straightened, there is still room for descent. When the bucket is tilted, the roller shutter 4 will continue to press against the enclosed bulk grain truck 5 under the weight of the counterweight rod 45. On the truck bed, the dust generated during the unloading of bulk grain is blocked in the dustproof bin 2 by the soft curtain 3 and the roller shutter 4. At the same time, the dust collector is activated to remove the dust from the dustproof bin 2, so the dust will not escape into the external environment. After unloading is completed, the second servo reduction motor 43 drives the rotating shaft 41 to reverse, and the roller shutter 4 is rolled up. When the upper limit aluminum film 47 on the roller shutter 4 is sensed by the upper limit sensor 461, the roller shutter 4 rises to the position and stops rolling up. At the same time, the two soft curtains 3 open to the position, the enclosed bulk grain truck 5 drives away from the entrance and exit, and the two soft curtains 3 close together to close the entrance and exit.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A dustproof bin for the unloading pit, including: The pit is characterized by: a dustproof chamber surrounding the pit, a sealed suction hood at the top of the dustproof chamber, a connecting pipe connected to the suction hood, the connecting pipe being connected to a dust collector, and soft curtain sliding doors at both the left and right ends of the inlet and outlet. Each soft curtain sliding door comprises: a soft curtain, the fixed end of which is sealed and fixed to the side wall of the dustproof chamber; several sliding rods evenly distributed on the soft curtain, one of which is fixed to the moving end of the soft curtain; a guide wheel at each of the upper and lower ends of the sliding rod; a guide groove plate at each of the upper and lower ends of the inlet and outlet; two guide wheels on the sliding rod being rolled and engaged in the two guide groove plates; and a rack plate horizontally connected to the sliding rod located at the moving end of the soft curtain. Support frames are provided on the side walls, and a first servo geared motor and guide sleeve are provided on the support frames. A gear is provided on the first servo geared motor. A rack plate is slidably engaged in the guide sleeve on the corresponding side and meshes with the gear on the same side. Non-contact sensors are provided on both soft curtain sliding doors. The two non-contact sensors are electrically connected to the servo geared motors on their respective sides. A roller shutter door is provided on the dustproof chamber. The roller shutter door includes: a roller shutter, which is wound on a rotating shaft. The rotating shaft is rotatably located at the upper end of the inlet and outlet and connected to the driven sprocket. A second servo geared motor is provided on the dustproof chamber. A drive sprocket is provided on the second servo geared motor. A transmission chain is connected between the drive sprocket and the driven sprocket.

2. The dustproof bin for unloading pit according to claim 1, characterized in that: A counterweight bar is sewn and wrapped around the lower end of the roller blind, and a stop bar is set below the pivot. The roller blind is inserted into the gap between the stop bar and the pivot.

3. The dustproof bin for an unloading pit according to claim 2, characterized in that: An upper limit sensor and a lower limit sensor are installed on the stop bar. Both the upper limit sensor and the lower limit sensor are connected to the second servo reduction motor. An upper limit aluminum film that can be sensed by the upper limit sensor is installed at the lower end of the roller shutter, and a lower limit aluminum film that can be sensed by the lower limit sensor is installed at the upper end of the roller shutter.

4. The dustproof bin for an unloading pit according to claim 1, characterized in that: Several air suction holes are provided on both the left and right side walls of the dustproof chamber. Several air suction pipes are installed on both the left and right side walls of the dustproof chamber. Each air suction pipe corresponds to one air suction hole. Air suction pipes on the same side are connected to the same branch pipe. The two branch pipes on both sides of the dustproof chamber are connected, and one of the branch pipes is connected to the connecting pipe.

5. The dustproof bin for an unloading pit according to claim 1, characterized in that: The non-contact sensor includes a laser rangefinder and an ultrasonic rangefinder. Both the laser rangefinder and the ultrasonic rangefinder are mounted on a sliding rod located at the moving end of the soft curtain. Both the laser rangefinder and the ultrasonic rangefinder are electrically connected to the first servo reduction motor on the corresponding side. A contact sensor is mounted on the sliding rod located at the moving end of the soft curtain. The contact end of the contact sensor extends out of the soft curtain sliding door. The contact sensor is electrically connected to the first servo reduction motor on the corresponding side.

6. The dustproof bin for an unloading pit according to claim 1, characterized in that: A wheel stop is installed on the outer wall of the guide plate located at the lower end of the inlet and outlet.

7. The dustproof bin for an unloading pit according to claim 1, characterized in that: Both ends of the guide trough plate located at the upper end of the inlet and outlet are equipped with position limiters.

8. The dustproof bin for an unloading pit according to claim 1, characterized in that: Several reinforcing rods are inclinedly installed between the moving rod located at the moving end of the soft curtain and the rack plate on the same side.

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