A fully automatic self-driving lifting dust-proof device

Abstract

The present invention discloses a fully automatic self-driven lifting dust-proof device, which belongs to the technical field of crushing and screening equipment. When the material falls into the groove formed by the blades of the impeller, it has a certain amount of kinetic energy and gravitational potential energy. This part of energy can drive the impeller to rotate while outputting a torque value; after the deceleration of the meshing gears, the torque is amplified to a certain value, which is greater than the torque applied to the winch by the stacking hopper and the accordion air guide cover, and the stacking hopper and the accordion air guide cover can be lifted upward. Among them, in the transmission connection state, the driving transmission wheel drives the driven transmission wheel to rotate forward, and the winch rotates upward to reel in the lifting rope, and the stacking hopper is lifted up. In the separation or sliding connection state, the stacking hopper will pull the winch downward through the lifting rope to release the lifting rope, and the driven transmission wheel rotates in the opposite direction, thereby realizing the downward descent of the stacking hopper; thereby realizing self-driven rise and fall.

Description

Technical Field

[0001] The invention relates to the technical field of crushing and screening equipment for sand, gravel and ore, and in particular to a fully automatic self-driven lifting dust-proof device. Background Art

[0002] After crushing and screening sand, gravel, and ore, crushing and screening equipment typically transfers the processed material from the conveyor outlet to the ground for stacking to facilitate subsequent loading and transportation. These finished materials, such as sand, gravel, and ore, contain varying proportions of fine dust. The conveyor outlet is typically more than two meters above the ground. As the finished material freely falls from the conveyor outlet to the ground, some of the fine dust separates from the finished material and floats into the atmosphere, creating smog pollution. This not only harms the health of nearby workers but also adversely affects nearby electromechanical equipment.

[0003] In order to reduce the formation of haze, the existing technical solution is usually to add a dust cover to wrap the falling trajectory of the material. However, as the material continues to accumulate or transfer, the height position of the material's landing point is constantly changing randomly. The dust cover discharge port needs to be raised and lowered in real time according to the change in the landing point height position to ensure that the dust cover discharge port is always in contact with the upper surface of the material pile to achieve a better dust-proof effect and avoid the accumulation of materials in the dust cover.

[0004] To this end, the Chinese utility model patent, "A hexagonal fully automatic lifting dust cover," with publication number CN210456218U, uses a winch to drive the dust cover. The Chinese utility model patent, "A lifting dust cover for electromechanical equipment," with publication number CN211686490U, uses an electric hoist to pull up the accordion-shaped telescopic cover.

[0005] It can be seen that the dust control device of conventional crushing and screening equipment requires a complete electromechanical system, including a reducer, motor, controller, sensor, and wiring harness, to achieve the real-time lifting and lowering function of the dust control device's discharge port. This relatively complex electromechanical system increases the production cost, maintenance cost, and energy consumption of the dust control device. Summary of the Invention

[0006] The object of the present invention is to provide a fully automatic self-driven lifting dust prevention device to address the above problems, which can transport processed sand, gravel and ore from the conveyor outlet to the ground and divert and pile them up.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A fully automatic self-propelled lifting dust-proof device, comprising:

[0009] The telescopic cover mechanism includes a dust cover and a stacking hopper. The stacking hopper is installed at the bottom end of the dust cover. The inner wall of the stacking hopper is provided with a guide surface section that gradually increases as it moves away from the dust cover.

[0010] The box seat is a hollow box structure with an inner cavity. The top of the box seat is provided with a feed port, and the bottom of the box seat is provided with a discharge port. The top of the dust cover is installed at the bottom of the box seat.

[0011] The rotating mechanism includes a rotating impeller, a drive shaft and a drive transmission wheel. The rotating impeller is rotatably installed in the inner cavity of the box seat through the drive shaft. The two ends of the drive shaft pass through the longitudinal side walls of the box seat, and the two ends of the drive shaft are installed with drive transmission wheels. The material falling point of the feed inlet of the box seat is on the lateral side of the rotating impeller so that it can be driven to rotate when the material falls;

[0012] A clutch mechanism is installed on the outer side walls of both longitudinal ends of the box seat. The clutch mechanism includes a base, a slide rail assembly and an elastic member. The base is installed on the outer side wall of the box seat through the slide rail assembly, and the base is connected to the outer side wall of the box seat through the elastic member. The base can slide inward or outward along the slide rail assembly in the radial direction of the drive transmission wheel under the action of the elastic member;

[0013] The retracting and unretracting mechanism is used in pair with the clutch mechanism. The retracting and unretracting mechanism includes a winch, a lifting rope, a driven shaft and a driven transmission wheel. The driven shaft is rotatably mounted on the base. Both ends of the driven shaft pass through and are placed on both longitudinal sides of the base. The two ends of the driven shaft are respectively mounted with a winch and a driven transmission wheel. The driven transmission wheel can be separated from, slidably connected to, or transmission-connected to the driving transmission wheel when the base slides radially along the driving transmission wheel. One end of the lifting rope is connected to the winch, and the other end of the lifting rope is connected to the stacking hopper.

[0014] Among them, when the proportion of the height of the section of the guide surface section supported by the accumulated materials in it to its total height is greater than a certain height ratio, the driven transmission wheel is in a fully or semi-linked transmission connection state with the driving transmission wheel under the action of the elastic member; when the proportion of the height of the part of the guide surface section supported by the materials to its total height is less than or equal to a certain height ratio, the driven transmission wheel is in a sliding connection state or a separation state with the driving transmission wheel under the action of the elastic member.

[0015] The driving transmission wheel is the driving gear, and the driven transmission wheel is the driven gear. The driven gear can be fully or semi-linked with the driving gear when the base slides radially inward along the driving gear, and can be slidingly connected or separated with the driving gear when the base slides radially outward along the driving gear; wherein the driving shaft is rotatably mounted on the outer wall of the box seat through a driving bearing, and the driven shaft is rotatably mounted on the base through a driven bearing.

[0016] As described above, the base can slide radially along the drive transmission wheel under the action of the elastic member. When the stacking hopper is supported to a certain extent by the accumulated material therein, the driven transmission wheel and the driving transmission wheel are in a fully or semi-coupled transmission connection state. Otherwise, they are in a separated state or a sliding connection state. Moreover, the rotating impeller is driven to rotate when the material falls. In the transmission connection state, the driving transmission wheel drives the driven transmission wheel to rotate in the forward direction, and the winch rotates upward to reel in the lifting rope, lifting the stacking hopper upward. In the separated or sliding connection state, the stacking hopper will pull the winch downward to release the lifting rope through the lifting rope, and the driven transmission wheel rotates in the opposite direction, thereby causing the stacking hopper to descend downward, thereby achieving self-driven ascent and descent.

[0017] Based on the above solution, in an improved solution, in order to solve the problem of adjusting the elastic force of the elastic member, the clutch mechanism also includes an elastic force adjustment member, the I end of the elastic member is connected to the base, and the II end of the elastic member is connected to the outer wall of the box seat through the elastic force adjustment member. The elastic force adjustment member can adjust its working position to move closer to or further away from the base under the action of an external force. The elastic force adjustment member is an adjusting screw, and a support seat is provided on the outer wall of the box seat. The adjusting screw is threadedly connected to the support seat. When the adjusting screw is tightened, its working position moves closer to the base, and when the adjusting screw is loosened, its working position moves away from the base. In this way, the elastic force adjustment member can be used to adjust the length of the elastic member to be compressed or stretched, so as to increase or decrease its elastic force, thereby adjusting the height of the stacking hopper to rise or fall, and has a large elastic force adaptation range and lifting height range.

[0018] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0019] 1. The base of the present invention is capable of sliding radially along the drive transmission wheel under the action of the elastic member. When the stacking hopper is supported to a certain degree by the accumulated material within, the driven transmission wheel and the driving transmission wheel are in a fully or semi-coupled transmission connection state; otherwise, they are in a separated or sliding connection state. Furthermore, when the material falls into the groove formed by the impeller blades, it possesses a certain amount of kinetic energy and gravitational potential energy, which drives the impeller to rotate while simultaneously outputting a torque value. In the transmission connection state, the driving transmission wheel drives the driven transmission wheel to rotate forward, and the winch rotates upward to reel in the lifting rope, lifting the stacking hopper upward. In the separated or sliding connection state, the stacking hopper pulls the winch downward to release the lifting rope through the lifting rope, and the driven transmission wheel rotates in the opposite direction, causing the stacking hopper to descend downward, thereby achieving self-driven ascent and descent. After the material enters the dust control device from the box base feed port, the dust generated is enclosed in the inner cavity of the box base and the accordion dust cover, preventing the dust from being directly discharged into the surrounding environment and forming haze, thus achieving the purpose of dust prevention.

[0020] 2. The present invention can adjust the compression or stretching length of the elastic member through the elastic force adjusting member to increase or decrease the elastic force, thereby adjusting the rising or falling height of the stacking hopper. It has a large elastic force adaptation range and lifting height range, and realizes self-driven rising and falling distance adjustment.

[0021] 3. The present invention improves and simplifies the existing technical solutions, eliminates the external drive and electrical control system, realizes zero energy consumption and fully automatic lifting of the dustproof device, reduces the production cost, maintenance cost and energy consumption cost of the equipment, and achieves the purpose of energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 yes Figure 1 Local magnification.

[0024] Figure 3 yes Figure 1 Another enlarged partial view.

[0025] Figure 4 yes Figure 1 Front view of .

[0026] Figure 5 yes Figure 4 A partial enlarged view of .

[0027] Figure 6 yes Figure 4 CC cross-sectional view.

[0028] Figure 7 yes Figure 6 A partial enlarged view of .

[0029] Figure 8 yes Figure 6 Another enlarged view of a part.

[0030] Figure 9 yes Figure 6 Another enlarged view of a part.

[0031] Figure 10 yes Figure 1 Schematic diagram of the internal structure of the running status.

[0032] Figure 11 yes Figure 10 A partial enlarged view of .

[0033] Figure 12 yes Figure 10 Another enlarged view of a part.

[0034] Figure 13 yes Figure 10 Schematic diagram of the impeller structure.

[0035] Figure 14 yes Figure 13 A partial enlarged view of .

[0036] Figure 15 yes Figure 13 Another enlarged view of a part.

[0037] In the attached figure, 1, box seat, 2, dust cover, 3, stacking hopper, 4, driving bearing seat, 5, rotating impeller, 6, driving gear, 7, guide rail, 8, slider, 9, base, 10, driven shaft, 11, driven gear, 12, winch, 13, lifting rope, 14, upper limit block, 15, lower limit block, 16, compression spring, 17, material. DETAILED DESCRIPTION

[0038] The specific implementation of the invention is further described below with reference to the accompanying drawings.

[0039] Example 1

[0040] like Figures 1-15 As shown, a fully automatic self-propelled lifting dust-proof device of this embodiment includes:

[0041] The telescopic cover mechanism includes a dust cover 2 and a stacking hopper 3. The stacking hopper 3 is installed at the bottom end of the dust cover 2. The inner wall of the stacking hopper 3 is provided with a guide surface section that gradually increases as it moves away from the dust cover;

[0042] The box base 1 is a hollow box structure with an inner cavity. The top of the box base 1 is provided with a feed port 1-1, and the bottom of the box base 1 is provided with a discharge port 1-2. The top of the dust cover 2 is installed at the bottom of the box base 1;

[0043] The rotating mechanism includes a rotating impeller 5, a drive shaft 5-1 and a drive transmission wheel. The rotating impeller 5 is rotatably installed in the inner cavity of the box base 1 through the drive shaft 5-1. The two ends of the drive shaft 5-1 pass through the longitudinal side walls of the box base 1, and the two ends of the drive shaft 5-1 are installed with a drive transmission wheel. The material falling point of the feed inlet 1-1 of the box base 1 is on the lateral side of the rotating impeller 5 so that it can be driven to rotate when the material falls;

[0044] Clutch mechanism: Clutch mechanisms are installed on the outer side walls of both longitudinal ends of the box base 1. The clutch mechanism includes a base 9, a slide rail assembly and an elastic member. The base 9 is installed on the outer side wall of the box base 1 through the slide rail assembly so that it can slide radially inward or outward along the driving transmission wheel, and the base 9 is connected to the outer side wall of the box base 1 through the elastic member so that it is subjected to the elastic force of the elastic member;

[0045] The retracting and unwinding mechanism is used in pair with the clutch mechanism. The retracting and unwinding mechanism includes a winch 12, a lifting rope 13, a driven shaft 10 and a driven transmission wheel. The driven shaft 10 is rotatably mounted on the base 9. Both ends of the driven shaft 10 are passed through and placed on both longitudinal sides of the base 9. The two ends of the driven shaft 10 are respectively mounted with a winch 12 and a driven transmission wheel. The driven transmission wheel can be separated, slidably connected or transmission-connected with the driving transmission wheel when the base 9 slides radially along the driving transmission wheel. One end of the lifting rope 13 is connected to the winch 12, and the other end of the lifting rope 13 is connected to the stacking hopper 3.

[0046] Among them, when the proportion of the height of the section of the guide surface section supported by the accumulated materials therein to its total height is greater than a certain height ratio, the driven transmission wheel is in a fully-linked or semi-linked transmission connection state with the driving transmission wheel under the action of the elastic member (the elastic force of the elastic member and the combined action of the dust cover, the stacking hopper, the gravity of the clutch mechanism, etc.); when the proportion of the height of the section of the guide surface section supported by the materials to its total height is less than or equal to a certain height ratio, the driven transmission wheel is in a sliding connection state or a separation state with the driving transmission wheel under the action of the elastic member (the combined action of the elastic force of the elastic member and the dust cover, the stacking hopper, the gravity of the clutch mechanism, etc.).

[0047] Dust cover 2 is an accordion-style dust cover. The discharge section of the housing base 1 tapers in a trumpet-like configuration as it moves away from the feed inlet. Discharge port 1-2 is located at the center of the accordion-style dust cover's cross-section. Dust cover 2 is mounted at the bottom of the housing base, beneath the support base. A housing flange 1-3 is welded to the housing base 1. An upper flange 2-1 is welded or bonded to the top of the dust cover 2 and secured with bolts. To better guide the material, discharge port 1-2 extends axially into the dust cover for a certain distance.

[0048] Because the accumulated materials form a conical structure, the stacking hopper 3 adopts a trumpet-shaped cylindrical structure. A lower cover flange 2-2 is welded or bonded to the bottom of the dust cover 2, while a hopper flange 3-1 is welded or integrally formed to the top of the stacking hopper 3, which is then secured by bolts. A clamping base is welded to the bottom of the stacking hopper 3. The base has a vertical clamping hole and a pin hole on its side that connects to the clamping hole. The lifting rope 13 is connected to the clamping base through the clamping hole, the pin hole, and the pin shaft.

[0049] The impeller 5 includes a sleeve seat 5-2 and blades 5-3. A plurality of blades 5-3 are welded to the sleeve seat 5-2 and distributed in a circular array in the circumferential direction. The blades 5-3 are arranged to extend axially, and the material drop point of the housing's feed port is on the lateral side of the impeller's sleeve seat. The sleeve seat 5-2 is fixedly mounted on the drive shaft 5-1. In this way, the material falls on the blades and impacts the blades to drive the impeller to rotate. In a more preferred impeller embodiment, the impeller 5 also includes end plates 5-4. End plates 5-4 are welded to both ends of the blades 5-3 on the sleeve seat. Grooves are formed between adjacent blades and the two end plates. The material drop point of the housing's feed port is in the groove on the lateral side of the impeller's sleeve seat. In this way, the material falls into the groove and accumulates. The weight of the material and the impact of the fall drive the impeller to rotate, giving it greater driving force.

[0050] The slide rail assembly utilizes conventional guide rails and matching sliders. In this example, they are arranged axially symmetrically along the line connecting the driven and driving transmission wheels to distribute force and ensure smooth sliding. Specifically, the slide rail assembly comprises a pair of sliders 8 and a pair of guide rails 7. The guide rails 7 are mounted on the outer walls of the housing 1, with each slide rail 7 slidably connected to a slider 8. The ends of a base 9 are mounted on the same pair of sliders 8, and the base 9 can slide radially inward or outward along the driving transmission wheels along with the pair of sliders. As shown in the figure, a shim can be placed between the guide rails and the outer wall of the housing to adjust the transmission connection surface between the driving and driven transmission wheels.

[0051] In order to realize the clutch function, it is necessary to realize linkage transmission when the force of the elastic member is relatively large, and to realize sliding or separation when the gravity is relatively large. In addition to the left and right horizontal directions (in the horizontal and very small angle scenes, for example, when the angle between the center line of the driven transmission wheel and the driving transmission wheel and the horizontal plane is less than or equal to 5°, the self-weight cannot be used to move and reset because the maximum gravity is less than the sum of the elastic force and the friction force), the driven transmission wheel can be in the up and down, upper left, lower left, upper right and lower right directions. Taking into account the influence of gravity of the clutch mechanism and its upper retraction mechanism, in order to optimize the force of the elastic member, the driven transmission wheel is arranged directly below or above the driving transmission wheel. This example is explained by arranging the driven transmission wheel directly below the driving transmission wheel. Correspondingly, this example extends the guide rail on the longitudinal and vertical planes (the plane formed by the longitudinal and vertical planes). Correspondingly, since the base 9 is arranged at a certain distance from the outer wall of the box seat, in order to optimize the force of the elastic member so that the force acts vertically, this embodiment is provided with a protruding support seat 1-4 on the outer wall of the box seat 1. The support seat 1-4 is located directly below the base 9, and the two ends of the elastic member are respectively installed on the base 9 and the support seat 1-4; at the same time, the elastic member can be fixed by limiting the position by setting a limiting protrusion inside it as shown in the figure, and other embodiments can also be fixed by welding or bolting. The elastic member has elastic force when it is compressed or stretched and recovers. It is generally a spring or a spring sheet. Corresponding to the above, as shown in the figure, this embodiment takes a compression spring as an example. The compression spring 16 is arranged below the base 9. After being compressed, it acts vertically upward. When the elastic force is relatively large, it pushes the driven transmission wheel to slide inward in the radial direction of the driving transmission wheel.

[0052] Corresponding to the above, this embodiment is described using the driving transmission wheel as the driving gear and the driven transmission wheel as the driven gear. The driven gear can be fully or partially coupled to the driving gear when the base slides radially upward along the driving gear. The driven gear can be slidably connected or disconnected from the driving gear when the base slides radially downward along the driving gear. The driving shaft 5-1 is rotatably mounted on the outer wall of the housing 1 via a driving bearing and a driving bearing seat 4, and the driven shaft 10 is rotatably mounted on the base 9 via a driven bearing. This embodiment uses a conventional bearing rotatable connection as an example, and other alternatives are not described in detail.

[0053] The telescopic cover mechanism is installed at the bottom of the box seat. When there is a material pile supported at the bottom of the hopper and the lifting rope is tightened, the gravity of the telescopic cover mechanism is divided into three parts, one of which acts on the box seat, the second acts on the material pile, and the third acts on the tension of the lifting rope.

[0054] When the rope tension is zero, the compression spring force is greater than the clutch mechanism's own weight and friction (slide rail), forcing the base to slide radially upward along the drive gear, causing the driven gear and drive gear to mesh and connect. At this point, the driven gear and drive gear are in a semi- or fully coupled state. The impeller then rotates under the action of the material, generating a torque that drives the drive gear, which in turn drives the driven gear through the gear transmission, and in turn drives the capstan, which winds the rope upward. Then, after the rope is tightened and the hopper is pulled, the torque applied to the winch by the rope gradually increases, the rope tension gradually increases, and the sum of the rope tension and the clutch mechanism's self-weight gradually increases. When it is greater than the sum of the compression spring force and the friction force, the elastic member is forced to compress, which can force the base to slide radially downward along the drive gear until the forces are balanced (the sum of the rope tension and the clutch mechanism's self-weight equals the compression spring force). At this time, the driven gear and the driving gear are in a sliding connection state, the driving gear stops driving the driven gear and stops driving the winch. Then, the base continues to slide downward due to inertia, and the winch continues to rotate due to inertia. At this time, the driven gear and the driving gear enter a separated state. The compression spring force is greater than the sum of the clutch mechanism's self-weight and friction force, which can force the base to stop sliding downward and slide radially upward along the drive gear, and the above state is repeated.

[0055] The base is pulled downward by the hopper and the bottom of the dust cover, which are pulled down by the rope. The hopper's guide surface is supported by the upward diagonal force of the accumulated material, reducing this tension. The material falls from the center and gradually accumulates in a conical shape. As the material pile grows taller and larger, the upper slope of the material pile and the inclined surface of the guide surface come into contact, forming a mutually contacting support section. When the proportion of the height h of the material-supported section of the guide surface section relative to its total height H is greater than a certain height ratio b, the rope tension (or torque value) is less than a certain conversion threshold, and the driven transmission wheel (driven gear) is in a fully or semi-linked transmission connection state with the driving transmission wheel (driving gear) under the combined action of the elastic force of the elastic part and the gravity of the telescopic cover mechanism and the clutch mechanism; when the proportion of the height of the material-supported section of the guide surface section relative to its total height is less than or equal to a certain height ratio, and the tension is greater than or equal to a certain conversion threshold, the driven transmission wheel (driven gear) is in a sliding connection state with the driving transmission wheel (driving gear) under the combined action of the elastic force of the elastic part and the gravity of the telescopic cover mechanism and the clutch mechanism.

[0056] As mentioned above, b = h / H, b takes the value of 1 / 4, 1 / 3 or 1 / 2, such as Figure 12As shown, this embodiment is preferably described using b = 0.5 as an example, specifically, H is 30 cm and h is 15 cm. The angle of the inclined surface of the material pile is less than or equal to the angle a of the inclined surface of the guide surface segment. The bottom section of the guide surface segment contacts and supports the upper surface of the material pile. In the operating state, when the upper surface of the material pile sinks upward to point h, the elastic force of the elastic member is greater than the sum of its own weight, tension, and friction, thereby pushing the base upward. The driven gear moves upward with the base, and the driven gear and the driving gear gradually enter a semi-linked transmission connection and a fully linked transmission connection. The driven gear then rotates with the driving gear, and the winch rotates upward to reel in the lifting rope. The lower pile hopper is then lifted upward by the lifting rope. The contact area of the material pile gradually decreases. When it drops below h, the sum of the elastic force and friction of the elastic member is less than or equal to the sum of its own weight and tension, causing the base to move downward, and the driven gear moves downward with the base. The driven gear and the driving gear gradually enter a sliding connection and a disengagement state, and the aforementioned state is repeated.

[0057] Since the stacking hopper 3 adopts an overall trumpet-shaped cylindrical structure, its inner wall surfaces are all guide surface segments, and the inclination angle a of the guide surface segment wall surface is 30°-60°. In order to achieve a better dust-proof effect, the inclination angle of the guide surface segment wall surface of the stacking hopper (the angle between the inclined wall section and the horizontal plane) is greater than or equal to the inclination angle of the upper surface of the material pile; for example, the inclination angle a of the guide surface segment wall surface is 45°, and the inclination angle of the material pile surface in this stacking hopper area is 30°. When the inclination angle of the wall of the guide surface section of the stacking hopper is greater than the inclination angle of the upper surface of the material pile, the material pile accumulates from bottom to top and is gradually supported on the guide surface section, and then the stacking hopper is gradually lifted to a certain height, and at the same time, part of the material leaks out from the bottom of the stacking hopper; there are two situations afterwards. First, the weight height and transmission torque of the stacking hopper are adjusted to reduce the lifting distance of the stacking hopper, so that the bottom end of the guide surface section is still partially submerged by the material during the lifting process, and the guide surface section is not completely separated from the material surface, and no dust will leak out; second, due to the small height of the guide surface section and the inertia of movement, the guide surface section is slightly separated from the material surface, and dust begins to leak out from its bottom, and then the stacking hopper moves downward, and the bottom end of the guide surface section first contacts the material surface, shielding the dust for the first time, and then the guide surface section continues to move downward without dust, and the amount of dust is small. However, when the inclination angle of the wall of the guide surface section of the stacking hopper is smaller than the inclination angle of the upper surface of the material pile, the material pile needs to be squeezed out from the inner bottom to be gradually supported on the guide surface section from top to bottom, and large adjustments are required for each type of material and its different forces; moreover, if the inclination angle of the guide surface section is smaller than the surface of the material pile, then when the stacking hopper is lifted and then moved down, the top of the guide surface section will first contact the material surface, and then the guide surface section will continue to move down and continue to generate dust. Compared with the aforementioned case with a larger inclination angle, the dust generation time is longer.

[0058] As mentioned above, when the lifting rope is not straightened, the base is not subjected to tension, and the elastic force of the elastic member is relatively large. Under its action, the driven gear and the driving gear will be in a fully linked or semi-linked engagement state; when the lifting rope is straightened and tightened, when the stacking hopper diversion section is not subjected to supporting force, the driven gear and the driving gear are in a separated state, and when the stacking hopper diversion section is subjected to supporting force, the driven gear and the driving gear are in a sliding connection state, a fully linked or semi-linked engagement state.

[0059] The base can slide radially along the drive transmission wheel under the action of the elastic member. When the stacking hopper is supported to a certain extent by the accumulated material therein, the driven transmission wheel and the driving transmission wheel are in a fully coupled or semi-coupled transmission connection state. Otherwise, they are in a separated state or a sliding connection state. Moreover, the rotating impeller is driven to rotate when the material falls. In the transmission connection state, the driving transmission wheel drives the driven transmission wheel to rotate forward, and the winch rotates upward to reel in the lifting rope, thereby lifting the stacking hopper upward. In the separated or sliding connection state (at this time, the driven transmission wheel can rotate in the opposite direction), the stacking hopper will pull the winch downward to release the lifting rope through the lifting rope, and the driven transmission wheel rotates in the opposite direction, thereby causing the stacking hopper to descend downward. In this way, the material push and its own weight are used to achieve self-driven ascent and descent.

[0060] Example 2

[0061] The second embodiment is improved based on the first embodiment. The second embodiment further includes a sliding limit structure. For other details not fully described, please refer to the first embodiment.

[0062] like Figures 1-15 As shown, a fully automatic self-driven lifting dust-proof device of embodiment 2, the slide rail assembly also includes a pair of limit blocks, the limit blocks are used in pairs with the guide rails, the limit blocks include an upper limit block 14 and a lower limit block 15, the upper limit block 14 and the lower limit block 15 are respectively installed at the two ends of the guide rail 7, and the slider 8 slides between the upper limit block 14 and the lower limit block 15 to enable the driven transmission wheel and the driving transmission wheel to switch between the full linkage transmission connection state and the separation state.

[0063] The transmission wheel of this embodiment 2 is illustrated by taking the transmission gear (driving gear and driven gear) as an example. When the slider 8 moves to the upper limit block 14, the transmission wheel is in a fully linked transmission connection state. When the slider 8 moves to the lower limit block 15, the driven gear and the driving gear are separated by a certain distance (typically 1, 2 or 3 cm, etc.).

[0064] In this way, upper limit blocks and lower limit blocks are installed at both ends of the slide rail through bolt connections, which play the role of limiting the sliding distance and preventing the elastic parts or transmission wheels (including driving transmission wheels and driven transmission wheels) from being damaged due to sliding too long a distance.

[0065] Example 3

[0066] This embodiment 3 is improved based on the aforementioned embodiment 1 or embodiment 2. This embodiment 3 also has a dust cover rising and falling distance adjustment structure. For other unexplained details, please refer to the aforementioned embodiments 1-2.

[0067] like Figures 1-15 As shown, in order to solve the problem of elastic force adjustment of the elastic member, the clutch mechanism of embodiment 3 also includes an elastic force adjustment member. End I of the elastic member is connected to the base, and end II of the elastic member is connected to the outer wall of the box seat through the elastic force adjustment member. The elastic force adjustment member can adjust its working position under the action of external force to make it approach or move away from the base.

[0068] The elastic force adjusting member used in this embodiment 3 is a conventional member for adjusting the elastic force of the spring. The elastic force adjusting member is described as an adjusting screw. A support base 1-4 is arranged on the outer wall of the box base 1. The adjusting screw is threadedly connected to the support base 1-4. When the adjusting screw is tightened, its working position is close to the base 9, and when the adjusting screw is loosened, its working position is away from the base 9. Figure 7 As shown, the protruding rods 1-4 of the support seat are removed and replaced with an adjusting screw threadedly connected to the support seat. The adjusting screw is fixedly connected to the end of the compression spring II, and the adjusting screw can be tightened or loosened during adjustment; alternatively, a support plate can be installed in the middle of the adjusting screw. The support plate has a large width to support the compression spring. The adjusting screw is not fixedly connected to the end of the compression spring II, and the front end of the adjusting screw protrudes into the end of the compression spring II, thereby limiting and supporting the compression spring.

[0069] For example, in the initial state, the end of the compression spring II is 15 cm away from the base. Tighten the adjusting screw and adjust the end of the compression spring II to 14 or 13 cm away from the base. At this time, its elastic force can be increased relative to the initial state, otherwise its elastic force can be reduced.

[0070] In this way, the compression or stretching length of the elastic part can be adjusted through the elastic adjusting part to increase or decrease the elastic force, thereby adjusting the rising or falling height of the stacking hopper. It has a large elastic force adaptation range and lifting height range, and realizes self-driven rising and falling distance adjustment.

[0071] Example 4

[0072] This embodiment 4 further illustrates the optimal combination examples of the aforementioned embodiments 1-3. For any incomplete explanation, please refer to the aforementioned embodiments 1-3.

[0073] The dust-proof device of this embodiment 4 has a box seat 1 above. When in use, the upper end (top) of the box seat is installed below the conveyor outlet by bolt connection, for example, it is suspended on the conveyor belt support of the belt conveyor through the open end of the U-shaped hanger so that it is in a position below the conveyor belt outlet to support the gravity of the entire dust-proof device. The upper end of the box seat 1 has a feed port 1-1, and the lower end (bottom) of the base has a discharge port 1-2. The upper end of the accordion-type dust cover 2 is connected and fixed to the flange 1-3 below the box seat 1, and the lower end of the accordion-type dust cover 2 is connected and fixed to the stacking hopper 3. A drive bearing seat 4 is respectively installed on the two opposite sides of the box seat 1, and the impeller 5 is installed on these two drive bearing seats 4 through the impeller shaft 5-1, and the impeller 5 is located in the inner cavity of the box seat 1. A drive gear 6 is respectively installed at both ends of the impeller shaft 5-1, and the drive gear 6 can rotate synchronously with the impeller 5. Two guide rails 7 are mounted on the two opposing sides of the housing 1, below the drive bearing seat 4. Each guide rail 7 is mounted with a slider 8. A base (driven bearing seat) 9 is mounted on each pair of sliders 8 on the same side. A driven shaft 10 passes through the bearing hole of the base 9 and is fixed to the base 9. A driven gear 11 is mounted on one end of the driven shaft 10, and a capstan 12 is mounted on the other end. The upper end of a lifting rope 13 is fixed to the capstan 12, and the lower end of the lifting rope 13 is fixed to the stacking hopper 3. By rotating the capstan 12, the height position of the stacking hopper 3 and the overall length of the accordion-style dust cover 2 can be changed. An upper limit block 14 and a lower limit block 15 are mounted on the corresponding guide rail 7 above and below each slider 8.

[0074] The slider 8, base 9, driven shaft 10, driven gear 11, and capstan 12 form a clutch mechanism. This clutch mechanism can slide up and down within the range set by the upper and lower limit blocks 14 and 15 on the guide rail 7. When the clutch mechanism slides to the upper limit, the driven gear 11 and the drive gear 6 are properly engaged. The driving force of the impeller 5 is transmitted to the capstan 12 through the two pairs of meshing gears, and the capstan 12 is in an externally driven state. When the clutch mechanism slides to the lower limit, the driven gear 11 is completely disengaged from the drive gear 6, and the capstan 12 is in a free-wheeling state.

[0075] The upper end of the compression spring 16 is fixed below the base 9, and the lower end of the compression spring 16 is fixed to the support base 1-4 of the box base 1. The elastic force of the compression spring 16 within the sliding range of the clutch mechanism is set to always be greater than the gravity value of the clutch mechanism and less than the combined gravity value of the clutch mechanism and the stacking hopper 3. When the stacking hopper 3 is in contact with the material 17, the gravity of the stacking hopper 3 is not superimposed on the clutch mechanism, and the clutch mechanism moves upward to the upper limit under the elastic force of the compression spring 16, and the driving gear 6 and the driven gear 11 are normally engaged. When the impeller 5 has driving force, the capstan 12 rotates, the stacking hopper 3 is lifted, and the accordion air guide hood 2 is compressed and shortened; when the stacking hopper 3 is not in contact with the material 17, that is, the stacking hopper 3 is suspended in the air, the gravity of the stacking hopper 3 is superimposed on the gravity of the clutch mechanism, and the clutch mechanism overcomes the elastic force of the compression spring 16 and slides downward to the lower limit, the driving gear 6 and the driven gear 11 are completely disengaged, the capstan 12 is in a free state, the stacking hopper 3 descends under the action of gravity, and the accordion air guide hood 2 unfolds and becomes longer.

[0076] The material 17 enters from the feed port 1-1 of the base, falls on the impeller 5, drives and follows the impeller 5 to rotate a certain angle, then leaves the impeller 5, passes through the discharge port 1-2 of the box base 1, the accordion dust cover 2, and finally flows out of the stacking hopper 3 and accumulates on the ground.

[0077] The feed port 1 - 1 , the discharge port 1 - 2 and the stacking hopper 3 of the box seat 1 are all designed to be trumpet-shaped. The trumpet-shaped structure can guide the material 17 and control the flow trajectory of the material 17 .

[0078] The accordion-type air guide cover 2 and the stacking hopper 3 are both made of materials with low density.

[0079] The driving gear 6 and the driven gear 11 can be designed with a suitable reduction ratio according to the density of the material 17 and the weight of the accordion-type air guide hood 2 and the stacking hopper 3 to ensure that there is sufficient torque to lift the accordion-type air guide hood 2 and the stacking hopper 3.

[0080] Working Principle: When material falls into the grooves formed by the impeller blades, it exerts a certain amount of kinetic energy and gravitational potential energy. This energy drives the impeller to rotate while also generating a torque value. After deceleration by the meshing gears, the torque is amplified to a certain value. When it exceeds the torque applied to the winch by the hopper and accordion hood, the hopper and accordion hood are lifted upward.

[0081] Working process:

[0082] Working condition 1: When no material enters the dust prevention device, the material is not transferred, and the material landing height remains unchanged, under the action of gravity, the stacking hopper (guide surface section) is always in contact with the upper surface of the material (the height ratio of the guide surface section supported by the material is greater than the threshold value b). At this time, the driving gear and the driven gear are engaged (full linkage or semi-linkage connection state), and the dust prevention device is in a static standby state.

[0083] Working condition 2: When no material enters the dust prevention device, the material is gradually transferred away, the height of the material landing point continues to decrease, and the guide surface section supported by the material gradually decreases (the height is higher than the threshold value b) until the stacking hopper (guide surface section) is suspended in the air without contact with the upper surface of the material. Under the action of gravity, the spring is compressed, and the driving gear and the driven gear gradually separate until they are completely disengaged (separated state). The stacking hopper continues to descend with the material, and the accordion air guide hood continues to expand.

[0084] Condition 3: When material enters the dust control device, it is not transferred, and the height of the material drop point continues to increase. The hopper is in contact with the material's upper surface (the height ratio of the guide surface section supported by the material is greater than threshold b). The drive gear and driven gear engage, and the material drives the impeller to rotate, turning the capstan. The straight length of the lifting rope decreases, the hopper is lifted, and the accordion hood is compressed. After the hopper is lifted a certain distance, the height ratio of the guide surface section supported by the material decreases below threshold b, and may even separate from the upper material surface. Due to inertia, the drive gear and driven gear do not completely separate immediately, and the hopper continues to rise a short distance before descending. During this moment, if any material falls, a new material pile surface is formed, and the hopper will fall onto this newly formed material pile surface after descending. If material continues to enter, the hopper will alternate between rising and descending, continuously raising the hopper's height. At the same time, as the hopper rises, the accumulated material inside leaks out from the bottom, ensuring that material does not accumulate inside the dust control device. During this process, the stacking hopper remains in contact with the material surface or a small gap is created momentarily. The small gap that exists momentarily will not cause a large amount of dust to leak out.

[0085] Working condition 4: When the material enters the dust prevention device, the material is gradually transferred away, and the height of the material landing point keeps changing. The entire system is in an alternating state between working condition 2 and working condition 3 according to the rise and fall of the material landing point. However, the stacking hopper and the material surface alternate between fitting and momentary non-fitting (the height ratio of the guide surface section supported by the material is greater than or less than the threshold value b). However, the gap during the momentary non-fitting is very small and the time is very short, which will not cause a large amount of dust to leak out. The spring force can even be adjusted as mentioned above so that the bottom of the stacking hopper does not separate from the upper surface of the material pile.

[0086] After the material enters the dust prevention device from the box base feed port, the dust formed is sealed in the inner cavity of the box base and the accordion dust cover. The dust will never be directly discharged into the surrounding environment to form haze, which can achieve the purpose of dust prevention.

[0087] On the other hand, in an improved solution, the dust-proof device also includes dust-reduction pipes for working conditions with a lot of dust. Dust-reduction pipes can be installed at points A, B, C, and D in the box seat as needed. Specifically, the dust-reduction pipes are spray or suction pipes (spray pipes or suction pipes); when the dust concentration in the dust cover is too high, the dust can be adsorbed and dropped by spraying, or the dust can be sucked away by a low-pressure suction pipe.

[0088] As mentioned above, this application improves and simplifies existing technical solutions, eliminates external drive and electrical control systems, achieves zero energy consumption and fully automatic lifting of the dustproof device, reduces the production cost, maintenance cost, and energy consumption cost of the equipment, and achieves the purpose of energy conservation and emission reduction. Compared with the existing technology, this application has a simple mechanical structure, no electrical control system, and no electrical drive components. It can achieve self-drive zero energy consumption and fully automatic control, significantly reducing the production cost of the equipment, the maintenance cost of the equipment operation, and the energy consumption cost, thereby saving energy and reducing emissions.

[0089] Based on the aforementioned embodiments 1-4, the following will illustrate the replacement schemes. For details not fully explained, please refer to the aforementioned embodiments 1-4. For example, in one replacement scheme, another expansion scheme structure of the dustproof device is to set the clutch mechanism and the guide rail 7 above the driving gear 6, and change the compression spring 16 to a tension spring. When its elastic force is relatively large, it pushes the driven gear to slide outward in the radial direction of the driving gear to enter a sliding or separation state, otherwise it enters a linkage transmission state. For another example, in another replacement scheme, the dustproof device can set the driven transmission wheel directly above or in the upper left, upper right, lower left, etc. For another example, in another replacement scheme, the driving transmission wheel and the driven transmission wheel of the dustproof device adopt a driving pulley and a driven pulley transmission structure. At this time, the structure and position of the elastic member are changed accordingly, and the driving pulley and the driven pulley move in opposite directions to tighten the belt to achieve a full linkage or semi-linkage transmission connection state. Otherwise, the belt is loosened to achieve a separation state or a sliding connection state. For example, in another alternative solution, the slide rail assembly of the dustproof device may adopt a unilateral arrangement structure, which has poorer stability than a bilateral arrangement structure.

[0090] It should be pointed out that the examples of the above embodiments can be preferably combined with one or more of them according to actual needs, and multiple examples use a set of drawings to illustrate the combined technical features, which will not be explained one by one here.

[0091] It should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0092] The above description is a detailed description and illustration of the preferred embodiments of the present invention, but these descriptions are not intended to limit the scope of protection claimed by the present invention. Any equivalent changes or modifications completed under the technical teachings suggested by the present invention should fall within the scope of patent protection covered by the present invention.

Claims

1. A fully automatic self-propelled lifting dust-proof device, comprising: A telescopic cover mechanism, comprising a dust cover and a stacking hopper, wherein the stacking hopper is mounted at the bottom end of the dust cover, and wherein the inner wall of the stacking hopper is provided with a guide surface section that gradually increases in size as it moves away from the dust cover; characterized in that it further comprises: The box seat is a hollow box structure with an inner cavity, the top of the box seat is provided with a feed port, and the bottom of the box seat is provided with a discharge port, and the top of the dust cover is installed at the bottom of the box seat; A rotating mechanism, comprising a rotating impeller, a drive shaft, and a drive transmission wheel. The rotating impeller is rotatably mounted in the inner cavity of the box seat via the drive shaft. Both ends of the drive shaft extend through the longitudinal side walls of the box seat, and both ends of the drive shaft are mounted with drive transmission wheels. The material drop point of the feed port of the box seat is located on one lateral side of the rotating impeller so that it can be driven to rotate when the material falls. A clutch mechanism is installed on the outer side walls at both longitudinal ends of the box seat. The clutch mechanism includes a base, a slide rail assembly and an elastic member. The base is installed on the outer side wall of the box seat through the slide rail assembly, and the base is connected to the outer side wall of the box seat through the elastic member. The base can slide inward or outward along the slide rail assembly in the radial direction of the drive transmission wheel under the action of the elastic member; A retracting and unretracting mechanism, the retracting and unretracting mechanism is used in pair with a clutch mechanism, the retracting and unretracting mechanism includes a winch, a lifting rope, a driven shaft and a driven transmission wheel, the driven shaft is rotatably mounted on the base, both ends of the driven shaft are passed through and placed on both longitudinal sides of the base, and the two ends of the driven shaft are respectively mounted with a winch and a driven transmission wheel, and the driven transmission wheel can be separated from, slidably connected to, or transmission-connected to the driving transmission wheel when the base slides radially along the driving transmission wheel, one end of the lifting rope is connected to the winch, and the other end of the lifting rope is connected to the stacking hopper; Among them, when the proportion of the height of the section of the guide surface section supported by the accumulated materials in it to its total height is greater than a certain height ratio, the driven transmission wheel is in a fully or semi-linked transmission connection state with the driving transmission wheel under the action of the elastic member; when the proportion of the height of the part of the guide surface section supported by the materials to its total height is less than or equal to a certain height ratio, the driven transmission wheel is in a sliding connection state or a separation state with the driving transmission wheel under the action of the elastic member.

2. The fully automatic self-propelled lifting dust-proof device according to claim 1, characterized in that: The dust cover is an accordion-type dust cover, and the discharge port section of the box seat is a trumpet-shaped structure that gradually becomes smaller as it moves away from the feed port, and the discharge port is located at the center of the cross section of the accordion-type dust cover.

3. The fully automatic self-propelled lifting dust-proof device according to claim 1, characterized in that: The rotating impeller includes a sleeve seat, blades and end plates. The sleeve seat is provided with a plurality of blades distributed in a circular array in the circumferential direction. The blades are arranged to extend along the axial direction. End plates are provided at both ends of the blades on the sleeve seat. Grooves are formed between two adjacent blades and the two end plates. The sleeve seat is fixed to the drive shaft; wherein the material drop point of the feed port of the box seat is in the groove on the lateral side of the sleeve seat of the impeller.

4. The fully automatic self-propelled lifting dust-proof device according to claim 1, characterized in that: The driven transmission wheel is arranged directly below the driving transmission wheel, the guide rail extends in the longitudinal and vertical planes, a support seat is arranged on the outer side wall of the box seat, the support seat is located directly below the base, and both ends of the elastic member are respectively installed on the base and the support seat; Wherein, the elastic member is a spring.

5. A fully automatic self-propelled lifting dust-proof device according to claim 1 or 4, characterized in that: The driving transmission wheel is a driving gear, and the driven transmission wheel is a driven gear. The driven gear can be fully or semi-linked with the driving gear when the base slides radially inward along the driving gear, and can be slidingly connected or separated with the driving gear when the base slides radially outward along the driving gear; wherein the driving shaft is rotatably mounted on the outer wall of the box seat through a driving bearing, and the driven shaft is rotatably mounted on the base through a driven bearing.

6. The fully automatic self-propelled lifting dust-proof device according to claim 1, characterized in that: The slide rail assembly includes a pair of sliders and a pair of guide rails. The pair of guide rails are respectively installed on the outer side walls of the box base. Each slide rail is slidably connected to a slider. The two ends of the base are respectively installed on the same pair of sliders, and the base can slide radially inward or outward along the driving transmission wheel with the pair of sliders.

7. The fully automatic self-propelled lifting dust-proof device according to claim 6, characterized in that: The slide rail assembly also includes a pair of limit blocks, which are used in combination with the guide rails. The limit blocks include an upper limit block and a lower limit block. The upper limit block and the lower limit block are respectively installed at both ends of the guide rails. The slider slides between the upper limit block and the lower limit block to enable the driven transmission wheel and the driving transmission wheel to switch between the full-link transmission connection state and the separation state.

8. The fully automatic self-propelled lifting dust-proof device according to claim 1, characterized in that: The clutch mechanism also includes an elastic adjustment member, end I of the elastic member is connected to the base, and end II of the elastic member is connected to the outer wall of the box seat through the elastic adjustment member. The elastic adjustment member can adjust its working position under the action of external force to make it approach or move away from the base.

9. The fully automatic self-propelled lifting dust-proof device according to claim 8, characterized in that: The elastic adjustment member is an adjusting screw, and a support seat is arranged on the outer side wall of the box seat. The adjusting screw is threadedly connected to the support seat. When the adjusting screw is tightened, its working position is close to the base, and when the adjusting screw is loosened, its working position is far away from the base.

10. The fully automatic self-propelled lifting dust-proof device according to claim 1, characterized in that: It also includes dust reduction pipe fittings, which are installed in the box seat; wherein the dust reduction pipe fittings are spray pipe fittings or suction pipe fittings.

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