Conveying system

Abstract

The present invention provides a conveying system, which includes a belt conveyor, a head cleaning device and a tail cleaning device. The belt conveyor includes a frame, a belt, a head roller, a tail roller and a driving mechanism. The head roller and the tail roller are respectively installed at two ends of the frame, the belt is wound around the head roller and the tail roller, the driving mechanism is installed on the frame and connected to the head roller, and the driving mechanism can drive the head roller to rotate to move the belt; the head cleaning device includes a head cleaning piece, and the head cleaning piece and the head roller jointly clamp the belt; the tail cleaning device includes a tail cleaning piece, and the tail cleaning piece and the tail roller jointly clamp the belt. The conveying system of the present invention improves the cleaning effect of the belt by adding a tail cleaning device at the tail of the belt conveyor, reduces the risk of powder falling and dust in the belt conveyor, and also reduces the pollution of dust to the production environment.

Description

Technical Field

[0001] The present invention relates to the technical field of material conveying, and in particular to a conveying system. Background Art

[0002] Belt conveyor is a commonly used conveying device. Belt conveyor can be used to convey cement, bulk materials such as coal, and granular materials such as sand. During the use of the belt conveyor, material debris or powder will remain on the surface of the belt. In the prior art, a cleaning device is usually set at the head of the belt conveyor, and the cleaning device scrapes off the powder remaining on the surface of the belt. However, the residual powder usually adheres to the surface of the belt, and the cleaning device in the prior art has a poor cleaning effect on the powder remaining on the surface of the belt. During the operation of the belt conveyor, dust and ash are still prone to occur, which affects the environment of the production site. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a conveying system, wherein the head and tail of the belt conveyor are both provided with cleaning devices, which is conducive to improving the cleaning effect of the powder remaining on the belt surface.

[0004] According to an embodiment of the present invention, the conveying system includes: a belt conveyor, including a frame, a belt, a head roller, a tail roller and a driving mechanism, the head roller and the tail roller are respectively installed at two ends of the frame, the belt is wound around the head roller and the tail roller, the driving mechanism is installed on the frame and connected to the head roller, the direction from the tail roller to the head roller is the conveying direction, the driving mechanism can drive the head roller to rotate to move the belt, so that the material carried by the belt moves along the conveying direction; a head cleaning device, including a head cleaning piece, the head cleaning piece abuts against the outer surface of the belt, and the head cleaning piece and the head roller jointly clamp the belt; a tail cleaning device, including a tail cleaning piece, the tail cleaning piece abuts against the outer surface of the belt, and the tail cleaning piece and the tail roller jointly clamp the belt.

[0005] The conveying system according to the embodiment of the present invention has at least the following beneficial effects: the present invention adds a tail cleaning device at the tail of the belt conveyor, and the part of the belt that has been cleaned by the head cleaning device will be cleaned by the tail cleaning device later, and then return to the loading station. Since the belt is cleaned twice by the head cleaning device and the tail cleaning device (here, the belt 102 rotates one circle as the basis), the powder that is not cleaned by the head cleaning device will be cleaned by the tail cleaning device again. After two cleanings, the powder still adhered to the belt is less. Therefore, compared with the prior art, when the belt conveyor runs for the same time, the thickness of the powder adhered and accumulated on the surface of the belt is smaller, and the risk of powder falling and dust at the bottom of the belt is lower. The conveying system of the present invention improves the cleaning effect of the belt of the belt conveyor, reduces the risk of powder falling and dust on the belt conveyor, and also reduces the pollution to the production environment when the belt conveyor is running.

[0006] According to some embodiments of the present invention, the tail cleaning piece is located above the belt, the bottom end of the tail cleaning piece abuts against the top surface of the belt, and the two end edges of the belt along its own width direction are respectively a first edge and a second edge; the tail cleaning piece includes: a first scraper, the bottom end of the first scraper abuts against the top surface of the belt, the first scraper includes a first end and a second end sequentially arranged along the conveying direction, the second end is located above the belt and spaced apart from the first edge, and the first scraper gradually approaches the first edge from the first end to the second end; a second scraper, the bottom end of the second scraper abuts against the top surface of the belt, the second scraper includes a third end and a fourth end sequentially arranged along the conveying direction, the third end is connected to the first end, the fourth end is located above the belt and spaced apart from the second edge, and the second scraper gradually approaches the second edge from the third end to the fourth end.

[0007] According to some embodiments of the present invention, the tail cleaning device also includes: a third scraper, the third scraper is spaced apart from the second end, the bottom end of the third scraper is in contact with the top surface of the belt, and the projection of the second end along the conveying direction falls on the third scraper; a fourth scraper, the fourth scraper is spaced apart from the fourth end, the bottom end of the third scraper is in contact with the top surface of the belt, and the projection of the fourth end along the conveying direction falls on the fourth scraper; the third scraper and the fourth scraper are spaced apart along the width direction of the belt, and, along the conveying direction, the distance between the third scraper and the fourth scraper in the width direction of the belt gradually decreases.

[0008] According to some embodiments of the present invention, the direction from the second edge to the first edge is a first projection direction, and the direction from the first edge to the second edge is a second projection direction; the projection of the second end along the first projection direction falls on the third scraper, and the projection of the fourth end along the second projection direction falls on the fourth scraper.

[0009] According to some embodiments of the present invention, the belt has a reference line, which divides the belt into two parts arranged along the width direction of the belt; the first scraper and the second scraper are symmetrically arranged based on the reference line, and / or the third scraper and the fourth scraper are symmetrically arranged based on the reference line.

[0010] According to some embodiments of the present invention, the conveying system also includes a material unloading device, which is used to deliver materials to the belt. The material unloading device is located above the belt and downstream of the tail cleaning device along the movement direction of the belt.

[0011] According to some embodiments of the present invention, the tail cleaning device also includes: a fixed frame, which is relatively fixed to the frame; a movable frame, and the tail cleaning member is connected to the movable frame; an elastic member, and the two ends of the elastic member are respectively connected to the fixed frame and the movable frame, and the elastic force of the elastic member is used to keep the tail cleaning member in contact with the belt.

[0012] According to some embodiments of the present invention, the movable frame includes a first fixed portion and a first adjustable portion that are connected to each other, the first fixed portion is connected to the tail cleaning member, the first adjustable portion is connected to the elastic member, and the position of the first adjustable portion relative to the first fixed portion in the extension and contraction direction of the elastic member is adjustable.

[0013] According to some embodiments of the present invention, the fixed frame includes a second fixed portion and a second adjustable portion that are connected to each other, the second fixed portion is relatively fixed to the frame, the second adjustable portion is connected to the elastic member, and the position of the second adjustable portion relative to the second fixed portion in the extension and contraction direction of the elastic member is adjustable.

[0014] According to some embodiments of the present invention, the first fixed portion and the first adjustable portion are threadedly connected, and the first adjustable portion can rotate relative to the first fixed portion to change the position of the first adjustable portion relative to the first fixed portion in the telescopic direction of the elastic member.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 is a schematic diagram of a conveying system in one embodiment of the present invention;

[0018] Figure 2 A front view of a tail cleaning device of a conveying system in one embodiment of the present invention;

[0019] Figure 3 for Figure 2 A top view of the tail cleaning device in FIG.

[0020] Figure 4 For belt and Figure 2 Schematic diagram of the matching relationship between the tail cleaning member, the third scraper and the fourth scraper (top view);

[0021] Figure 5 Schematic diagram of the state before and after the position of the first adjustable part relative to the first fixed part is adjusted in an embodiment of the present invention.

[0022] Reference numerals:

[0023] 101- conveying system, 102- belt, 103- head roller, 104- tail roller, 105- head cleaning device, 106- tail cleaning device, 107- unloading device;

[0024] 201-tail cleaning member, 202-first scraper, 203-second scraper, 204-third scraper, 205-fourth scraper, 206-movable frame, 207-first adjustable part, 208-screw, 209-elastic member, 210-first fixed part, 211-fixed frame;

[0025] 301 - first end, 302 - second end, 303 - third end, 304 - fourth end, 305 - first edge, 306 - second edge, 307 - reference line. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0030] Figure 1 FIG. 1 shows a delivery system 101 in one embodiment of the present invention. Figure 1 As shown, the conveying system 101 includes a belt conveyor, a head cleaning device 105 and a tail cleaning device 106 .

[0031] The belt conveyor includes a frame, a belt 102, a head roller 103, a tail roller 104 and a driving mechanism. The frame and the driving mechanism are not shown in the figure. The frame can be erected on the ground, the head roller 103 is connected to the frame at both ends along its own axis, and the tail roller 104 is also connected to the frame at both ends along its own axis. The head roller 103 and the tail roller 104 can both rotate relative to the frame. The head roller 103 and the tail roller 104 are connected to the two ends of the frame respectively. The head of the belt conveyor is the end of the belt conveyor provided with the head roller 103, and the tail of the belt conveyor is the end of the belt conveyor provided with the tail roller 104. The driving mechanism may include a motor, the driving mechanism is mounted on the frame, and the driving mechanism is connected to the head roller 103. The belt 102 is wound around the outside of the head roller 103 and the tail roller 104, and when the motor drives the head roller 103 to rotate, the belt 102 will also move accordingly. The material to be conveyed will be placed on the section of the belt 102 between the top of the head roller 103 and the top of the tail roller 104. The direction from the tail roller 104 to the head roller 103 is the conveying direction, and the material placed on the belt 102 will move along the conveying direction. Figure 1When the head roller 103 rotates clockwise, the belt 102 also rotates clockwise, and the material moves from front to back, and is thus transported to the head of the belt conveyor, and the transport direction corresponds to the direction from front to back. The material transported to the head of the belt conveyor will be unloaded from the belt conveyor later. The belt conveyor may also include a plurality of rollers for supporting the belt 102, which are not shown in the figure. The rollers are connected to the frame and are located between the head roller 103 and the tail roller 104.

[0032] like Figure 1 As shown, the head cleaning device 105 is located at the head of the belt conveyor, and the head cleaning device 105 includes a head cleaning piece, which can be a hard plate (i.e., a scraper) or a brush. The head cleaning piece abuts against the outer surface of the belt 102, and the outer peripheral surface of the head roller 103 abuts against the inner surface of the belt 102, and the head cleaning piece and the head roller 103 jointly clamp the belt 102. Among them, the inner surface is the side surface of the belt 102 that does not contact the material, or the inner surface is the side surface of the belt 102 that contacts the head roller 103 and the tail roller 104; the outer surface is the side surface of the belt 102 that contacts the material, or the outer surface is the side surface of the belt 102 that does not contact the head roller 103 and the tail roller 104. Based on the movement direction of the belt, the head cleaning piece is stationary relative to the frame. When the belt 102 moves, the belt 102 moves relative to the head cleaning piece, and the powder (i.e., residual material) adhering to the outer surface of the belt 102 will be scraped off by the head cleaning piece, thereby cleaning the belt 102.

[0033] Similarly, if Figure 1 As shown, the tail cleaning device 106 is located at the tail of the belt conveyor, and the tail cleaning device 106 includes a tail cleaning member 201, which can be a hard plate (i.e., a scraper) or a brush. The tail cleaning member 201 abuts against the outer surface of the belt 102, and the outer peripheral surface of the tail roller 104 abuts against the inner surface of the belt 102. The tail cleaning member 201 and the tail roller 104 clamp the belt 102 together. With the moving direction of the belt 102 as a reference, the tail cleaning member 201 is stationary relative to the frame. When the belt 102 moves, the belt 102 moves relative to the tail cleaning member 201, and the powder (i.e., the residual material) adhering to the outer surface of the belt 102 will be scraped off by the tail cleaning member 201.

[0034] The tail cleaning device 106 may also include a bracket, the bracket is relatively fixed to the frame (for example, the two are fixedly connected to each other by screws), and the tail cleaning member 201 is connected to the bracket, so that the head cleaning member is immobile relative to the frame in the direction of movement of the belt. However, it should be noted that in directions other than the direction of movement of the belt, the head cleaning member can have a certain range of movement relative to the frame. For example, the tail cleaning device 106 with an elastic member 209 will be introduced below, and the head cleaning member can move in the up and down directions.

[0035] In the prior art, a cleaning device is usually only provided at the head of the belt conveyor. The loading station of the belt conveyor is located between the top of the tail roller and the top of the head roller. For the portion of the belt that has been cleaned by the cleaning device, in the subsequent process of returning to the loading station, due to the friction and vibration of the rollers and the tail roller, the powder remaining on the belt will fall to the ground or generate dust. After the belt is cleaned by the cleaning device located at the head of the belt conveyor (i.e., located at the head roller), a part of the powder adhering to the belt will be scraped off by the cleaning device at the head, but a part of the powder will still remain on the surface of the belt. Therefore, as the belt continuously transports materials, the powder will gradually accumulate, and the powder adhering to the surface of the belt will become thicker and thicker; the thicker the powder adhering to the surface of the belt, the higher the risk of powder falling and dust at the bottom of the belt when the portion of the belt that has been cleaned returns to the loading station.

[0036] The present invention adds a tail cleaning device 106 at the tail of the belt conveyor. The part of the belt 102 that has been cleaned by the head cleaning device 105 will be cleaned by the tail cleaning device 106 later, and then return to the loading station. Since the belt 102 is cleaned twice by the head cleaning device 105 and the tail cleaning device 106 (here, the belt 102 rotates one circle as the basis), the powder that is not cleaned by the head cleaning device 105 will be cleaned by the tail cleaning device 106 again. After two cleanings, the amount of powder still adhering to the belt 102 is less. Therefore, compared with the prior art, when the belt conveyor runs for the same time, the thickness of the powder adhering to and accumulating on the surface of the belt 102 is smaller, and the risk of powder falling and dust at the bottom of the belt 102 is lower.

[0037] like Figure 1 As shown, the tail cleaning device 106 can be located above the belt 102. Correspondingly, the tail cleaning member 201 is also located above the belt 102, and the bottom end of the tail cleaning member 201 abuts against the top surface of the belt 102. In this case, the top end of the tail roller 104 and the tail cleaning member 201 clamp the roller together. Figure 3 As shown, the tail cleaning member 201 can be configured as a V-shaped scraper, and the powder scraped off by the tail cleaning member 201 can be transported by the belt 102 as the next round of materials.

[0038] The shape of the tail cleaning member 201 is as follows: Figure 2 and Figure 3 As shown, the tail cleaning member 201 includes a first scraper 202 and a second scraper 203. The matching relationship between the tail cleaning member 201 and the belt 102 is as shown in FIG. Figure 4 As shown. The bottom ends of the first scraper 202 and the second scraper 203 are both connected to the top surface of the belt 102. Figure 4 As shown, the first scraper 202 includes a first end 301 and a second end 302 sequentially arranged along the conveying direction, and the first end 301 and the second end 302 are both located above the belt 102. In the present application, the first end 301 and the second end 302 are located above the belt 102, which means that the top-down projection of the first end 301 and the top-down projection of the second end 302 can both fall on the belt 102. The first end 301 and the second end 302 are also spaced apart along the width direction of the belt 102. The width direction of the belt 102 is perpendicular to the conveying direction. Figure 4 , the width direction of the belt 102 corresponds to the left-right direction. The two end edges of the belt 102 along its width direction are respectively a first edge 305 and a second edge 306, the second end 302 is spaced apart from the first edge 305, and from the first end 301 to the second end 302, the first scraper 202 gradually approaches the first edge 305. Similarly, the second scraper 203 includes a third end 303 and a fourth end 304 sequentially arranged along the conveying direction, the third end 303 is connected to the first end 301, the fourth end 304 is located above the belt 102 and spaced apart from the second edge 306, and from the third end 303 to the fourth end 304, the second scraper 203 gradually approaches the second edge 306.

[0039] Figure 4 The dotted path in the figure represents the movement path of the scraped powder. When the belt 102 moves, the powder adhering to the belt 102 is scraped off by the first scraper 202 and temporarily accumulated on the front surface of the first scraper 202. As the belt 102 continues to move, the powder accumulated on the front side of the first scraper 202 will rub against the belt 102, and this friction will drive this part of the powder to move along the front surface of the first scraper 202 (moving to the left rear), and this part of the powder will gradually move from the first end 301 to the second end 302 and finally leave the second end 302. Since the second end 302 is spaced apart from the first edge 305, the powder leaving the second end 302 is not easy to fall directly from the first edge 305 to the ground, and the powder leaving the second end 302 will still be on the belt 102 and be transported to the head of the belt conveyor along with the belt 102.

[0040] Similarly, when the belt 102 moves, the powder adhering to the belt 102 is scraped off by the second scraper 203 and temporarily accumulated on the front surface of the second scraper 203. As the belt 102 continues to move, the powder accumulated on the front side of the second scraper 203 will move along the front surface of the second scraper 203 (moving to the right rear), and this part of the powder will gradually move from the third end 303 to the fourth end 304 and eventually leave the fourth end 304; the powder leaving the fourth end 304 will still be on the belt 102 and will be transported to the head of the belt conveyor with the belt 102. The V-shaped tail cleaning member 201 can guide the scraped powder so that the scraped powder can be subsequently transported to the head of the belt conveyor by the belt 102.

[0041] Therefore, the advantage of the tail cleaning piece 201 being located above the belt 102 and arranged in a V-shape is that there is no need to provide an additional container for collecting the powder scraped off by the tail cleaning piece 201, and the powder originally adhering to the belt 102 can be fully recycled.

[0042] like Figure 1 As shown, the conveying system 101 further includes a feeding device 107, which is used to feed materials to the belt 102. The feeding device 107 is located above the belt 102 and downstream of the tail cleaning device 106 along the movement direction of the belt 102. In some embodiments, the feeding device 107 can be configured as a feeding chute, and the material enters the feeding chute from the top of the feeding chute, and leaves the feeding chute from the bottom of the feeding chute and is transferred to the belt 102. The feeding device 107 being located downstream of the tail cleaning device 106 means that the tail cleaning device 106 will not block the materials that need to be normally transported, and the powder scraped off by the tail cleaning member 201 can be mixed with the materials fed by the feeding device 107 after leaving the tail cleaning member 201, so as to be transported to the head of the belt conveyor together.

[0043] Reference Figure 2 and Figure 3 In one embodiment, the tail cleaning device 106 further includes a third scraper 204 and a fourth scraper 205. The tail cleaning member 201, the third scraper 204 and the fourth scraper 205 can be fixed on the same bracket of the tail cleaning device 106. Figure 4 As shown, the third scraper 204 and the fourth scraper 205 are both located above the belt 102, and the bottom ends of the third scraper 204 and the fourth scraper 205 are both in contact with the top surface of the belt 102. Figure 4, the projection of the second end 302 of the first scraper 202 along the conveying direction (i.e., the projection of the second end 302 from the front to the back) falls on the third scraper 204, and the projection of the fourth end 304 of the second scraper 203 along the conveying direction (i.e., the projection of the fourth end 304 from the front to the back) falls on the fourth scraper 205. That is, a part of the third scraper 204 is located behind the second end 302 of the first scraper 202, and a part of the fourth scraper 205 is located behind the fourth end 304 of the second scraper 203. The third scraper 204 is spaced apart from the second end 302, thereby reserving a space for the scraped powder to pass through; the fourth scraper 205 is spaced apart from the fourth end 304, thereby reserving a space for the scraped powder to pass through. The third scraper 204 and the fourth scraper 205 are spaced apart along the width direction of the belt 102, and in the conveying direction, the distance between the third scraper 204 and the fourth scraper 205 in the width direction of the belt 102 gradually decreases.

[0044] Reference Figure 4 Since the projection of the second end 302 of the first scraper 202 along the conveying direction falls on the third scraper 204, the powder scraped off by the first scraper 202 and leaving the first scraper 202 from the second end 302 will move to the third scraper 204 along with the movement of the belt 102. As the belt 102 moves, the powder accumulated on the front side of the third scraper 204 will move along the third scraper 204 under the action of the friction force of the belt 102, thereby gradually approaching the center of the belt 102. Similarly, the powder scraped off by the second scraper 203 and leaving the second scraper 203 from the fourth end 304 will move to the fourth scraper 205 along with the movement of the belt 102, and then the powder will move along the fourth scraper 205, thereby gradually approaching the center of the belt 102. Therefore, the main function of the third scraper 204 and the fourth scraper 205 is to gather the powder scraped off and dispersed by the tail cleaning member 201.

[0045] The advantage of the third scraper 204 and the fourth scraper 205 gathering the powder is that, on the one hand, the powder can be kept away from the two side edges of the belt 102, reducing the risk of the powder falling from the two side edges of the belt 102 to the ground, thereby reducing the pollution to the production environment; on the other hand, since the unloading device 107 usually delivers the material to the middle position of the belt 102, using the third scraper 204 and the fourth scraper 205 to gather the powder is conducive to mixing the scraped powder with the material delivered by the unloading device 107.

[0046] It should be noted that the third scraper 204 and the fourth scraper 205 do not have to clamp the belt 102 together with the tail roller 104. In the tail cleaning device 106, the tail cleaning member 201 plays a major cleaning role, and the tail cleaning member 201 and the tail roller 104 can clamp the belt 102 together.

[0047] Reference Figure 4 In one embodiment, the projection of the second end 302 along the first projection direction falls on the third scraper 204, and the projection of the fourth end 304 along the second projection direction falls on the fourth scraper 205. The direction from the second edge 306 to the first edge 305 is the first projection direction, and the first projection direction may correspond to Figure 4 The direction from the first edge 305 to the second edge 306 is the second projection direction, and the second projection direction may correspond to Figure 4 In the left-to-right direction.

[0048] The advantage of this arrangement is that it can reduce the risk that the powder cannot be gathered by the third scraper 204 and the fourth scraper 205, thereby improving the reuse rate of the scraped powder. Taking the first scraper 202 and the third scraper 204 as an example, at the moment when the powder scraped by the first scraper 202 leaves the second end 302 of the first scraper 202, the powder also has a certain speed in the width direction of the belt 102. More specifically, when the powder leaves the second end 302, the powder moves backward and leftward at the same time. Since the projection of the second end 302 along the first projection direction falls on the third scraper 204, even if the powder moves to the left, the powder will be blocked by the third scraper 204 and eventually move along the third scraper 204. Therefore, the arrangement that the projection of the second end 302 along the first projection direction falls on the third scraper 204 is conducive to reducing the powder that is not blocked by the third scraper 204. Based on a similar principle, the configuration that the projection of the fourth end 304 along the second projection direction falls on the fourth scraper 205 is conducive to reducing the powder that is not blocked by the fourth scraper 205. Therefore, the above configuration is conducive to reducing the powder that cannot be gathered by the third scraper 204 and the fourth scraper 205, thereby improving the reuse rate of the scraped powder.

[0049] The first scraper 202 and the second scraper 203 may be symmetrically arranged. Figure 4 As shown, the belt 102 has a reference line 307, and the belt 102 is divided into two parts arranged along the width direction of the belt 102 by the reference line 307; the first scraper 202 and the second scraper 203 are symmetrically arranged based on the reference line 307. This arrangement is conducive to improving the consistency of the cleaning effect of the two areas of the belt 102 located on both sides of the reference line 307. In order to make the scraped powder on both sides of the reference line 307 more evenly distributed, the third scraper 204 and the fourth scraper 205 can also be symmetrically arranged based on the reference line 307.

[0050] The first scraper 202, the second scraper 203, the third scraper 204 and the fourth scraper 205 can all be configured as flat plates, which is conducive to reducing the structural complexity of the four scrapers and reducing the cost of the four scrapers. In other embodiments, in order to guide the scraped powder, the first scraper 202, the second scraper 203, the third scraper 204 and the fourth scraper 205 can also be configured as arc-shaped plates.

[0051] As mentioned above, the tail cleaning device 106 may include a bracket, and the tail cleaning member 201 may be fixed on the bracket; in one embodiment, the bracket of the tail cleaning device 106 includes a fixed frame 211, a movable frame 206 and an elastic member 209. Figure 2 The fixing frame 211 is not shown in the figure. The position of the fixing frame 211 can be referred to Figure 5 The fixed frame 211 is used to be fixed relative to the frame of the belt conveyor, and the movable frame 206 is connected to the tail cleaning member 201. Figure 5 As shown, the two ends of the elastic member 209 are respectively connected to the fixed frame 211 and the movable frame 206, and the elastic force of the elastic member 209 is used to keep the tail cleaning member 201 in contact with the belt 102. Among them, there are different ways to implement the relative fixation of the fixed frame 211 and the frame. For example, the fixed frame 211 is directly fixed to the frame by screws. For another example, the unloading device 107 and the frame are both stationary relative to the ground, and the fixed frame 211 and the unloading device 107 are fixed by screws, thereby achieving relative fixation between the fixed frame 211 and the frame. The elastic member 209 can be set as a spring, and the elastic member 209 extends in the up and down direction, that is, the elastic member 209 can be retracted and retracted in the up and down direction.

[0052] Reference Figure 5 In the upper part of the belt 102, the top of the elastic member 209 is connected to the fixed frame 211, and the bottom of the elastic member 209 is connected to the movable frame 206. When the tail cleaning member 201 is in contact with the belt 102, the elastic member 209 is in a compressed state; in this way, the elastic force of the elastic member 209 tends to drive the movable frame 206 to move downward, so that the tail cleaning member 201 and the belt 102 remain in contact. In the case where the elastic member 209 is provided, even if the surface of the belt 102 is uneven, the tail cleaning member 201 and the belt 102 can maintain a relatively close contact, and the tail cleaning member 201 can efficiently scrape off the powder adhering to the belt 102, and the tail cleaning device 106 has a better cleaning effect on the belt 102.

[0053] In the case where the tail cleaning device 106 includes the third scraper 204 and the fourth scraper 205, the third scraper 204 and the fourth scraper 205 can also be connected to the movable frame 206. In this way, the third scraper 204 and the fourth scraper 205 can also be closely fitted with the belt 102, reducing the powder that is not in contact with the third scraper 204 and the fourth scraper 205.

[0054] Reference Figure 5 In some embodiments, the movable frame 206 includes a first fixed portion 210 and a first adjustable portion 207 that are connected to each other. The first fixed portion 210 is connected to the tail cleaning member 201, and the first adjustable portion 207 is connected to the elastic member 209. The first adjustable portion 207 is connected to the bottom end of the elastic member 209 and relatively fixed. The position of the first adjustable portion 207 relative to the first fixed portion 210 in the extension direction of the elastic member 209 is adjustable. In this setting, the length of the elastic member 209 is adjustable, and the elastic force of the elastic member 209 is adjustable, which is conducive to the user adjusting the cleaning effect of the tail cleaning device 106 on the belt 102, thereby improving the use flexibility of the tail cleaning device 106. For example, referring to Figure 5 When it is necessary to improve the cleaning effect of the tail cleaning device 106 on the belt 102, the user can move the first adjustable part 207 upward relative to the first fixed part 210, shorten the length of the elastic member 209, and increase the elastic force of the elastic member 209, so that the tail cleaning member 201 and the belt 102 are more closely abutted together.

[0055] The connection between the first adjustable portion 207 and the first fixed portion 210 can be a threaded connection. When the first adjustable portion 207 rotates relative to the first fixed portion 210, the position of the first adjustable portion 207 relative to the first fixed portion 210 in the expansion and contraction direction of the elastic member 209 will change. Figure 2 The first adjustable part 207 is set as a nut, and the first fixed part 210 includes a screw rod 208, which is set vertically. The nut is sleeved on the outside of the screw rod 208 and is threadedly connected with the screw rod 208. The top surface of the nut is connected to the bottom end of the elastic member 209. When the user turns the first adjustable part 207 (nut), the nut can move up and down relative to the screw rod 208, thereby changing the position of the bottom end of the elastic member 209. When the position of the top end of the elastic member 209 remains unchanged, changing the position of the bottom end of the elastic member 209 can change the length of the elastic member 209, thereby changing the elastic force of the elastic member 209.

[0056] Alternatively, in another embodiment, the first adjustable portion 207 is provided as a screw, and the first fixing portion 210 is not provided with a screw rod, but the first fixing portion 210 is provided with a threaded hole instead, the screw is vertically provided and provided in the threaded hole, the nut of the screw is located at the top of the screw, and the top surface of the nut is connected to the bottom end of the elastic member 209. In this arrangement, the user can change the position of the bottom end of the elastic member 209 by turning the screw, and finally change the elastic force of the elastic member 209.

[0057] The advantage of using a threaded connection between the first adjustable part 207 and the first fixed part 210 is that, when the user does not twist the first adjustable part 207, the threaded cooperation between the two can achieve locking between the first adjustable part 207 and the first fixed part 210, and there is no need to additionally set up other components in the tail cleaning device 106 for fixing the first adjustable part 207 and the first fixed part 210 to each other, which is conducive to saving the cost of the tail cleaning device 106.

[0058] Similarly, in some embodiments, the fixing frame 211 includes a second fixing portion and a second adjustable portion connected to each other, the second fixing portion is relatively fixed to the frame, the second adjustable portion is connected to the elastic member 209, and the position of the second adjustable portion relative to the second fixing portion in the extension direction of the elastic member 209 is adjustable. In this setting, the position of the top of the elastic member 209 can be adjusted by adjusting the position of the second adjustable portion, thereby adjusting the elastic force of the elastic member 209; this setting is also conducive to the user to adjust the cleaning effect of the tail cleaning device 106 on the belt 102, thereby improving the use flexibility of the tail cleaning device 106. The second fixing portion and the second adjustable portion can also be connected by threaded connection. The connection method between the second fixing portion and the second adjustable portion can refer to the connection method between the first fixing portion 210 and the first adjustable portion 207, and will not be repeated here.

[0059] It should be noted that, in order to adjust the elastic force of the elastic member 209, only the position of the top end of the elastic member 209 may be changed, only the position of the bottom end of the elastic member 209 may be changed, or both the top end and the bottom end of the elastic member 209 may be changed. Accordingly, in order to adjust the elastic force of the elastic member 209, at least one of the two settings of "the movable frame 206 includes the first fixed portion 210 and the first adjustable portion 207" and "the fixed frame 211 includes the second fixed portion and the second adjustable portion" only needs to be present in the tail cleaning device 106.

[0060] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A conveying system, characterized in that: include: A belt conveyor comprises a frame, a belt, a head roller, a tail roller and a driving mechanism, wherein the head roller and the tail roller are respectively mounted at two ends of the frame, the belt is wound around the head roller and the tail roller, the driving mechanism is mounted on the frame and connected to the head roller, the direction from the tail roller to the head roller is the conveying direction, and the driving mechanism can drive the head roller to rotate so that the belt moves, thereby causing the material carried by the belt to move along the conveying direction; A head cleaning device, comprising a head cleaning piece, the head cleaning piece abuts against the outer surface of the belt, and the head cleaning piece and the head roller jointly clamp the belt; A tail cleaning device, comprising a tail cleaning piece, the tail cleaning piece abuts against the outer surface of the belt, and the tail cleaning piece and the tail roller jointly clamp the belt; The tail cleaning member is located above the belt, and the bottom end of the tail cleaning member abuts against the top surface of the belt. The two end edges of the belt along its width direction are respectively a first edge and a second edge; the tail cleaning member includes a first scraper and a second scraper, and the bottom end of the first scraper abuts against the top surface of the belt. The first scraper includes a first end and a second end sequentially arranged along the conveying direction, the second end is located above the belt and spaced apart from the first edge, and from the first end to the second end, the first scraper gradually approaches the first edge, and the bottom end of the second scraper abuts against the top surface of the belt. The second scraper includes a third end and a fourth end sequentially arranged along the conveying direction, the third end is connected to the first end, the fourth end is located above the belt and spaced apart from the second edge, and from the third end to the fourth end, the second scraper gradually approaches the second edge; The tail cleaning device also includes a third scraper and a fourth scraper, the third scraper is spaced apart from the second end, the bottom end of the third scraper abuts against the top surface of the belt, and the projection of the second end along the conveying direction falls on the third scraper; the fourth scraper is spaced apart from the fourth end, the bottom end of the third scraper abuts against the top surface of the belt, and the projection of the fourth end along the conveying direction falls on the fourth scraper; the third scraper and the fourth scraper are spaced apart along the width direction of the belt, and, along the conveying direction, the distance between the third scraper and the fourth scraper in the width direction of the belt gradually decreases.

2. The conveying system according to claim 1, characterized in that The direction from the second edge to the first edge is a first projection direction, and the direction from the first edge to the second edge is a second projection direction; The projection of the second end along the first projection direction falls on the third scraper, and the projection of the fourth end along the second projection direction falls on the fourth scraper.

3. The conveying system according to claim 1, characterized in that The belt has a reference line, and the reference line divides the belt into two parts arranged along the width direction of the belt; The first scraper and the second scraper are symmetrically arranged based on the reference line, and / or the third scraper and the fourth scraper are symmetrically arranged based on the reference line.

4. The conveying system according to any one of claims 1 to 3, characterized in that: The conveying system also includes a material discharge device, which is used to discharge materials onto the belt. The material discharge device is located above the belt and downstream of the tail cleaning device along the movement direction of the belt.

5. The conveying system according to claim 1, characterized in that The tail cleaning device also includes: A fixed frame, fixed relative to the frame; A movable frame, the tail cleaning member being connected to the movable frame; An elastic member, two ends of which are respectively connected to the fixed frame and the movable frame, and the elastic force of the elastic member is used to keep the tail cleaning member in contact with the belt.

6. The conveying system according to claim 5, characterized in that The movable frame includes a first fixed portion and a first adjustable portion which are connected to each other, wherein the first fixed portion is connected to the tail cleaning member, the first adjustable portion is connected to the elastic member, and the position of the first adjustable portion relative to the first fixed portion in the extension and contraction direction of the elastic member is adjustable.

7. The conveying system according to claim 5 or 6, characterized in that: The fixing frame includes a second fixing portion and a second adjustable portion connected to each other, the second fixing portion is relatively fixed to the frame, the second adjustable portion is connected to the elastic member, and the position of the second adjustable portion relative to the second fixing portion in the extension and contraction direction of the elastic member is adjustable.

8. The conveying system according to claim 6, characterized in that The first fixed portion and the first adjustable portion are threadedly connected, and the first adjustable portion can rotate relative to the first fixed portion to change the position of the first adjustable portion relative to the first fixed portion in the expansion and contraction direction of the elastic member.

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