Dumbbell pin, chute assembly and scraper conveyor

Abstract

According to the dumbbell pin, the chute assembly and the scraper conveyor, dumbbell pin clamping blocks on one side are arranged, so that dumbbell pin clamping block receding space is formed in one side of a pin hole, and the limitation of the dumbbell pin on the minimum length of a chute is reduced. According to the main technical scheme, the dumbbell pin comprises a dumbbell pin body, the dumbbell pin body comprises a middle shaft, a first limiting head and a second limiting head, and the first limiting head and the second limiting head are arranged at intervals and connected to the middle shaft; the dumbbell pin clamping block comprises a lantern ring and a clamping head, the clamping head is connected with the lantern ring, the lantern ring is connected with the middle shaft through the side, opposite to the first limiting head, of the second limiting head and is limited in the circumferential direction of the middle shaft, and the clamping head protrudes out of the middle shaft and is used for acting with the chute to limit circumferential rotation of the dumbbell pin body; fixing holes are formed in the spring pins and the middle shaft, the fixing holes are located in the sides, opposite to the second limiting heads, of the dumbbell pin clamping blocks, and the spring pins are inserted into the fixing holes so as to limit the positions of the dumbbell pin clamping blocks. The invention is mainly used for coal transportation.

Description

Technical Field

[0001] The invention relates to the field of scraper conveyors, and in particular to a dumbbell pin, a chute assembly and a scraper conveyor. Background Art

[0002] At present, the scraper conveyor of the fully mechanized coal mining face is the main coal transportation equipment. It is mainly composed of multiple chutes arranged and spliced ​​in sequence to form a transportation channel. Dumbbell pins are used to connect adjacent chutes to facilitate the connection and disassembly of the chutes. When the length of the working face needs to be adjusted, the chutes can be added or reduced as needed.

[0003] The existing dumbbell pin usually includes a dumbbell pin body, two clamping blocks and two pins. The dumbbell pin body is embedded in the pin hole of the adjacent chute, and then the clamping blocks are respectively installed at both ends, and the clamping blocks are adjusted to be embedded in the clamping block anti-rotation groove to limit the position of the dumbbell pin body, and finally the position of the clamping block is fixed by the pin. The structure of the dumbbell pin requires two clamping block anti-rotation grooves for the clamping blocks to be installed on the chute, resulting in the existing chute being affected by the dumbbell pin structure. The minimum length is limited, resulting in insufficient flexibility in adjusting the length of the working surface. Summary of the invention

[0004] In view of this, in order to solve at least one of the above-mentioned technical problems, an embodiment of the present invention provides a dumbbell pin, a chute assembly and a scraper conveyor.

[0005] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0006] An embodiment of the present invention provides a dumbbell pin for connecting a chute (200). The dumbbell pin (100) comprises:

[0007] A dumbbell pin body (110), the dumbbell pin body (110) comprising a central axis (111), a first limiting head (112) and a second limiting head (113), the first limiting head (112) and the second limiting head (113) being arranged at intervals and both connected to the central axis (111);

[0008] A dumbbell pin clamp (120), the dumbbell pin clamp (120) comprising a collar (121) and a clamp head (122), the clamp head (122) being connected to the collar (121), the collar (121) being connected to the central axis (111) via a second limiting head (113) on a side opposite to the first limiting head (112), and the dumbbell pin clamp (120) and the central axis (111) being circumferentially limited, the clamp head (122) protruding from the central axis (111) and being used to act with the chute (200) to limit the circumferential rotation of the dumbbell pin body (110);

[0009] A spring pin (130) is provided with a fixing hole (114) on the central axis (111), the fixing hole (114) is located on a side of the dumbbell pin block (120) opposite to the second limiting head (113), and the spring pin (130) is inserted into the fixing hole (114) to limit the position of the dumbbell pin block (120).

[0010] The second limiting head (113) is provided with a limiting groove (115), and the clamping head (122) is embedded in the limiting groove (115) so that the dumbbell pin clamping block (120) and the central axis (111) are circumferentially limited;

[0011] And / or, the middle shaft (111) and the sleeve ring (121) are eccentrically connected.

[0012] In another aspect, the present invention further provides a chute assembly, comprising any one of the aforementioned dumbbell pins (100), and:

[0013] The chute (200) is provided with a pin hole (201) and an opening connected to the pin hole (201), the opening includes a limiting area (202), the edge of the limiting area (202) includes a limiting plane (203), the middle axis (111) is used to be embedded in the pin hole (201) through the opening, and the clamping head (122) is used to be embedded in the limiting area (202) to act with the limiting plane (203) to limit the circumferential rotation of the dumbbell pin body (110).

[0014] The inner wall of the pin hole (201) is in an arc shape that matches the central axis (111), and the width of the limiting area (202) is smaller than the maximum outer diameter of the central axis (111) and larger than the minimum outer diameter of the central axis (111).

[0015] The chute (200) includes a baffle plate chute side (210), a shovel plate chute side (220) and a middle plate (230);

[0016] The middle plate (230) is located between the baffle plate groove side (210) and the shovel plate groove side (220), and is connected to the baffle plate groove side (210) and the shovel plate groove side (220) respectively;

[0017] Pin holes (201) are provided on both the baffle plate groove side (210) and the shovel plate groove side (220), the dumbbell pin body (110) is used to be embedded in the pin hole (201) of the adjacent chute (200), and the dumbbell pin block (120) acts on the pin hole (201) of one of the adjacent chute (200).

[0018] Wherein, the baffle trough sides (210) of adjacent chutes (200) are plugged into each other;

[0019] And / or, the shovel plate trough sides (220) of adjacent chutes (200) are plugged into each other.

[0020] The middle plate (230) includes a first side edge (231) and a second side edge (232) which are opposite to each other in the length direction of the chute (200), the first side edge (231) is convex in a direction away from the second side edge (232), and the second side edge (232) is concave in a direction close to the first side edge (231), and the contours of the first side edge (231) and the second side edge (232) are adapted to each other so that the first side edge (231) and the second side edge (232) of adjacent chutes (200) can be butted.

[0021] The chute (200) further comprises a small tongue plate (240), the baffle plate groove side (210) and the shovel plate groove side (220) are provided with small tongue plates (240) at the first end in the length direction of the chute (200) in a relative manner, the baffle plate groove side (210) and the shovel plate groove side (220) are provided with tongue plate grooves at the second end in the length direction of the chute (200), and the small tongue plates (240) of one of the adjacent chutes (200) are used to be embedded in the tongue plate groove of the other one.

[0022] The chute (200) further comprises a tongue plate (250), the small tongue plate (240) and the tongue plate (250) have the same thickness and both extend outward from the lower surface of the middle plate (230).

[0023] On the other hand, the present invention also provides a scraper conveyor, comprising any one of the chute components (200) described above.

[0024] The dumbbell pin, chute assembly and scraper conveyor proposed in the embodiment of the present invention mainly realize that the dumbbell pin block is set on one side only by setting the clearance space of the dumbbell pin block on one side of the pin hole, thereby reducing the restriction of the dumbbell pin on the minimum length of the chute, avoiding the problem of the large minimum length of the chute caused by setting two block clearance spaces in the prior art, effectively shortening the length of the transition trough and the adjustment trough, especially the application effect on the adjustment trough is obvious, improving the arrangement of the scraper conveyor chute, and better adapting to mining working faces of different lengths. In addition, by protruding the clamp head from the central axis, the dumbbell pin body is circumferentially limited at a position close to the middle of the dumbbell pin body, so that the position of the dumbbell pin body is more stable, the limiting strength is sufficient, and the problem of insufficient limiting strength of the dumbbell pin body caused by unilateral limiting is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a dumbbell pin provided by an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of an exploded structure of a dumbbell pin provided by an embodiment of the present invention;

[0027] Figure 3A schematic structural diagram of a chute provided by an embodiment of the present invention at a first viewing angle;

[0028] Figure 4 A schematic diagram of the structure of a chute and a dumbbell pin provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a structure of connecting adjacent chutes provided by an embodiment of the present invention;

[0030] Figure 6 for Figure 5 A magnified schematic diagram of a local area where adjacent chutes are connected;

[0031] Figure 7 A schematic structural diagram of a chute at a second viewing angle provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of the specific implementation method, structure, characteristics and effects of a dumbbell pin proposed according to the present invention in combination with the accompanying drawings and preferred embodiments.

[0033] like Figure 1-2 As shown, an embodiment of the present invention provides a dumbbell pin for connecting a chute (200). There may be multiple chutes (200). According to different positions and functions, the chute (200) may be divided into a middle trough, an adjustment trough, etc. Multiple chutes (200) are arranged in sequence along the material movement direction to form a material transportation channel. The material movement direction on the chute (200) or the movement direction of the scraper is called the length direction, or the extension direction of the chute (200), and the direction perpendicular to the length direction is called the width direction. Dumbbell pins are respectively provided on both sides of the width direction of adjacent chutes (200) for fixing, thereby realizing the installation of the chute (200).

[0034] In one embodiment, the dumbbell pin (100) comprises: a dumbbell pin body (110), the dumbbell pin body (110) comprising a central axis (111), a first limiting head (112) and a second limiting head (113), the first limiting head (112) and the second limiting head (113) being arranged at intervals and both connected to the central axis (111);

[0035] A dumbbell pin clamp (120), the dumbbell pin clamp (120) comprising a collar (121) and a clamp head (122), the clamp head (122) being connected to the collar (121), the collar (121) being connected to the central axis (111) via a second limiting head (113) on a side opposite to the first limiting head (112), and the dumbbell pin clamp (120) and the central axis (111) being circumferentially limited, the clamp head (122) protruding from the central axis (111) and being used to act with the chute (200) to limit the circumferential rotation of the dumbbell pin body (110);

[0036] A spring pin (130) is provided with a fixing hole (114) on the central axis (111), the fixing hole (114) is located on a side of the dumbbell pin block (120) opposite to the second limiting head (113), and the spring pin (130) is inserted into the fixing hole (114) to limit the position of the dumbbell pin block (120).

[0037] The central axis (111) is a columnar structure, and the side elevation of the central axis (111) includes a first curved surface, a second curved surface, a first plane, and a second plane. The first plane and the second plane are arranged in parallel and spaced apart, and the first curved surface and the second curved surface are arranged relatively between the first plane and the second plane to enclose the side elevation of the central axis (111). The central axis (111) has a smaller outer diameter in the direction of the first plane and the second plane, and a larger outer diameter in the direction of the first curved surface and the second curved surface. In some embodiments, only the first plane and the first curved surface may be arranged, as long as the central axis (111) has a shorter outer diameter and a longer outer diameter.

[0038] The first stopper (112) is approximately flat and cylindrical, with an outer diameter greater than the maximum outer diameter of the central axis (111), and the first stopper (112) protrudes from the side wall of the central axis (111) all around the circumference. The shape of the second stopper (113) can be the same as that of the first stopper (112), or, in some embodiments, the second stopper (113) is also provided with a stopper groove (115), which will be further described in detail later. The dumbbell pin body (110) is approximately dumbbell-shaped as a whole, and the first stopper (112) and the second stopper (113) are used to act on two adjacent chutes (200) in the axial direction of the dumbbell pin body (110), respectively, and then realize the connection of adjacent chutes (200).

[0039] The dumbbell pin block (120) is used to limit the circumferential position of the dumbbell pin body (110) after the dumbbell pin body (110) is installed. The collar (121) is an annular structure, which is used to be sleeved on the central axis (111). After being sleeved, it contacts the second limit head (113). One end of the clamping head (122) is connected to the collar (121), and the other end extends in the direction of the first limit head (112) to the end beyond the second limit head (113). The clamping head (122) is an approximately rectangular plate-like structure, which can reduce the space occupied by the clamping head (122) while realizing the interaction with the chute (200). There are many ways to limit the circumferential position of the dumbbell pin block (120) and the central axis (111), which can be limited by the collar (121), or by the clamping head (122), or by both the collar (121) and the clamping head (122). In a more specific embodiment, Figure 2 As shown, a limiting groove (115) is provided on the second limiting head (113), and the clamping head (122) is embedded in the limiting groove (115), so that the dumbbell pin clamping block (120) and the central axis (111) are circumferentially limited. Taking the embodiment in which the side elevation of the central axis (111) includes a first arcuate surface, a second arcuate surface, a first plane and a second plane as an example, the limiting groove (115) is provided at the first plane, and after the collar (121) is sleeved on the central axis (111), the clamping head (122) is connected to the first plane surface, thereby making the position of the dumbbell pin clamping block (120) more stable. And / or, the central axis (111) and the collar (121) are eccentrically connected. For example, the shape of the inner hole of the collar (121) is adapted to the shape of the outer wall of the central axis (111), and the inner hole of the collar (121) is also straight at the first plane and the second plane, and is arc-shaped at the first arc surface and the second arc surface, thereby achieving circumferential limitation between the central axis (111) and the collar (121).

[0040] The spring pin (130) is a pin with a pull ring. After the sleeve ring (121) is sleeved, the spring pin (130) is inserted into the fixing hole (114) from the side of the sleeve ring (121) opposite to the second limit head (113), thereby axially fixing the position of the sleeve ring (121) or the dumbbell pin block (120).

[0041] The dumbbell pin, chute assembly and scraper conveyor proposed in the embodiment of the present invention mainly realize that the dumbbell pin block is set on one side only by setting the clearance space of the dumbbell pin block on one side of the pin hole, thereby reducing the restriction of the dumbbell pin on the minimum length of the chute, avoiding the problem of the large minimum length of the chute caused by setting two block clearance spaces in the prior art, effectively shortening the length of the transition trough and the adjustment trough, especially the application effect on the adjustment trough is obvious, improving the arrangement of the middle trough of the scraper conveyor, and better adapting to mining working faces of different lengths. In addition, by protruding the clamp head from the central axis, the dumbbell pin body is circumferentially limited at a position close to the middle of the dumbbell pin body, so that the position of the dumbbell pin body is more stable, the limiting strength is sufficient, and the problem of insufficient limiting strength of the dumbbell pin body caused by unilateral limiting is avoided.

[0042] On the other hand, the present invention further provides a chute assembly, comprising any of the above dumbbell pins (100) and a chute (200), wherein the dumbbell pin (100) may be any of the above embodiments, including any of the above advantages, which will not be described in detail. Figure 3-7 As shown, a pin hole (201) and an opening connected to the pin hole (201) are provided on the chute (200), the opening includes a limiting area (202), the edge of the limiting area (202) includes a limiting plane (203), the middle axis (111) is used to be embedded in the pin hole (201) through the opening, and the clamping head (122) is used to be embedded in the limiting area (202) to act with the limiting plane (203) to limit the circumferential rotation of the dumbbell pin body (110).

[0043] The opening refers to the opening facing outward in the width direction of the chute (200). The entire area of ​​the opening may be the limiting area (202), that is, the limiting plane (203) is set on all edges of the opening, or the limiting area (202) is set only in a part of the end of the opening in the length direction, and the other area is the area away from the limiting area (202) where the width of the opening gradually increases. Figure 6 As shown, after the two chutes (200) are butted, the openings on the two chutes (200) are butted, the limiting areas (202) on the two chutes (200) are areas away from each other, and the areas with gradually increasing opening widths are connected to each other, thereby facilitating the installation and placement of the dumbbell pin (100).

[0044] In one embodiment, the chute (200) includes a baffle plate chute side (210), a shovel plate chute side (220) and a middle plate (230). The middle plate (230) is located between the baffle plate chute side (210) and the shovel plate chute side (220), and is connected to the baffle plate chute side (210) and the shovel plate chute side (220) respectively. The middle plate (230) can be welded together with the baffle plate chute side (210) and the shovel plate chute side (220), and a rack seat and a square hole plate are welded on the baffle plate chute side (210). Pin holes (201) are provided on the baffle plate chute side (210) and the shovel plate chute side (220), and the dumbbell pin body (110) is used to be embedded in the pin hole (201) of the adjacent chute (200), and the dumbbell pin block (120) acts on the pin hole (201) of one of the adjacent chutes (200).

[0045] After the two adjacent chutes (200) are butted, the pin holes (201) on the two chutes (200) are butted and connected. When the two adjacent chutes (200) are installed, the installation direction of the dumbbell pin (100) can be changed as needed, so that the installation of the dumbbell pin (100) is more flexible.

[0046] like Figure 7 As shown, the inner wall of the pin hole (201) is in an arc shape that matches the central axis (111), and the width of the limiting region (202) is smaller than the maximum outer diameter of the central axis (111) and larger than the minimum outer diameter of the central axis (111). Taking the embodiment in which the side elevation of the central axis (111) includes a first arcuate surface, a second arcuate surface, a first plane, and a second plane as an example, the width of the limiting region (202) is smaller than the maximum distance between the first arcuate surface and the second arcuate surface of the central axis (111), and larger than the distance between the first plane and the second plane of the central axis (111). During installation, the dumbbell pin body (110) is first adjusted to be placed on the first plane and the second plane, and then the central axis (111) is pushed into the pin hole (201) through the opening, and then the dumbbell pin body (110) is rotated 90 degrees to be placed on the first arc surface and the second arc surface, and then the central axis (111) will not fall off from the pin hole (201), and then the dumbbell pin block (120) and the spring pin (130) are installed. It can be understood that the pin hole (201) is through in the axial direction, so that the first limit head (112) and the second limit head (113) are located outside the pin hole (201).

[0047] In one embodiment, the baffle plates (210) of adjacent chutes (200) are plugged into each other. And / or, the shovel plates (220) of adjacent chutes (200) are plugged into each other.

[0048] More specifically, Figure 7As shown, a first embedded block (211) is respectively provided at one end of the baffle plate groove side (210) and the shovel plate groove side (220) in the length direction, and a second embedded block (212) is respectively provided at the other end of the baffle plate groove side (210) and the shovel plate groove side (220) in the length direction. The first embedded block (211) includes an embedding recess, and the second embedded block (212) protrudes from the baffle plate groove side (210) or the shovel plate groove side (220) in the length direction, so that the second embedded block (212) of one of the adjacent chutes (200) is embedded in the embedding recess (213) of the other chute (200), thereby realizing the mutual insertion of the adjacent chutes (200).

[0049] The tenons of the baffle plate groove side (210) and the shovel plate groove side (220) adopt an "asymmetric" structural design and adopt a plug-in method, so that the connection between adjacent chutes (200) is tighter and more stable.

[0050] The first insert (211) and the second insert (212) are both provided with pin holes (201); the central axis (111) of the dumbbell pin body (110) is used to be simultaneously embedded in the pin holes (201) of the first insert (211) and the second insert (212) of the adjacent chute (200); the clamping head (122) is used to be embedded in the limiting area (202) of the first insert (211); the first limiting head (112) acts on the second insert (212); and the second limiting head (113) acts on the first insert (211); or the clamping head (122) is used to be embedded in the limiting area (202) of the second insert (212); the first limiting head (112) acts on the first insert (211); and the second limiting head (113) acts on the second insert (212).

[0051] In one embodiment, the middle plate (230) includes a first side edge (231) and a second side edge (232) opposite to each other in the length direction of the chute (200), the first side edge (231) is convex in a direction away from the second side edge (232), and the second side edge (232) is concave in a direction close to the first side edge (231), and the contours of the first side edge (231) and the second side edge (232) are adapted to each other so that the first side edge (231) and the second side edge (232) of adjacent chutes (200) are butted.

[0052] The first side edge (231) is a symmetrical, approximately herringbone edge. When the material is transferred, the direction is from the first side edge (231) to the second side edge (232). When adjacent chutes (200) are docked, due to errors or the angle settings of adjacent chutes (200), the adjacent middle plates (230) cannot be smoothly transitioned, and there will be height and angle errors. The first side edge (231) is a convex shape, and then when the scraper or the material moves, it will first contact the protruding part of the first side edge (231), achieving a small area of ​​contact first, and then gradually expanding the contact area with the connection position, so that the scraper can be less stuck during operation. Especially when bent vertically, the middle plate (230) has a certain angle. When the scraper chain passes quickly, the scraper contact area changes from small to large, and the two sides are symmetrically stressed, which can alleviate the left and right swing of the scraper assembly.

[0053] In one embodiment, the chute (200) further comprises a small tongue plate (240), and the baffle plate groove side (210) and the shovel plate groove side (220) are provided with the small tongue plates (240) at the first end in the length direction of the chute (200), that is, the small tongue plates (240) are located inside the baffle plate groove side (210) and the shovel plate groove side (220). The baffle plate groove side (210) and the shovel plate groove side (220) are provided with tongue plate grooves at the second end in the length direction of the chute (200), and the small tongue plates (240) of one of the adjacent chutes (200) are used to be embedded in the tongue plate groove of the other one.

[0054] By docking the small tongue plate (240) with the tongue plate groove, the positioning accuracy can be increased and the connection gap of the chute (200) can be reduced.

[0055] In one embodiment, the chute (200) further comprises a tongue plate (250), the small tongue plate (240) and the tongue plate (250) have the same thickness, and both extend outward from the lower surface of the middle plate (230).

[0056] The small tongue plate (240) and the tongue plate (250) are butted against each other, and the upper surfaces of the small tongue plate (240) and the tongue plate (250) are coplanar with the lower surface of the middle plate (230). Then, during installation, the middle plate (230) of one of the adjacent chutes (200) can be overlapped on the small tongue plate (240) and the tongue plate (250) of the other one, so as to achieve the closure of the connection position of the adjacent chutes (200).

[0057] like Figure 3 , 7As shown, the chute (200) further includes a bottom plate (250), and the bottom plate (250) is located below the middle plate (230). The tongue plate in the prior art is only located below the middle plate (230) and extends a distance in the width direction. During the coal mining process, the middle plate (230) is pushed and pulled by the hydraulic support, and the joints of the middle plates (230) will bend accordingly, and two adjacent middle plates (230) will form an angle. Coal is easy to fall into the lower chain path from the position where the tongue plate is not set on the middle plate (230), such as falling on the bottom plate (250), causing blockage. The present application ensures the closure of the upper chain path by adding a small tongue plate (240), avoids coal from entering the lower chain path, and avoids accumulation and blockage.

[0058] On the other hand, the present invention also provides a scraper conveyor, including any one of the above-mentioned chute assemblies (200), including the advantages of any one of the above-mentioned chute assemblies (200), which will not be repeated here.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A dumbbell pin, characterized in that: For connection of chute, the dumbbell pin includes: A dumbbell pin body (110), the dumbbell pin body (110) comprising a central axis (111), a first limiting head (112) and a second limiting head (113), the first limiting head (112) and the second limiting head (113) being arranged at intervals and both connected to the central axis (111); A dumbbell pin clamp (120), the dumbbell pin clamp (120) comprising a collar (121) and a clamp head (122), the clamp head (122) being connected to the collar (121), the collar (121) being connected to the central axis (111) via the second limiting head (113) on the side opposite to the first limiting head (112), and the dumbbell pin clamp (120) and the central axis (111) being circumferentially limited, the clamp head (122) protruding from the central axis (111) and being used to act with the chute to limit the circumferential rotation of the dumbbell pin body (110); A spring pin (130) is provided on the central axis (111) with a fixing hole (114), the fixing hole (114) is located on a side of the dumbbell pin block (120) opposite to the second limiting head (113), and the spring pin (130) is inserted into the fixing hole (114) to limit the position of the dumbbell pin block (120).

2. The dumbbell pin according to claim 1, characterized in that: The second limiting head (113) is provided with a limiting groove (115), and the clamping head (122) is embedded in the limiting groove (115) so that the dumbbell pin clamping block (120) and the central axis (111) are circumferentially limited; And / or, the central axis (111) and the sleeve ring (121) are eccentrically connected.

3. A chute assembly, characterized in that: The dumbbell pin (100) comprises any one of the preceding claims 1 to 2, and: A chute (200), wherein the chute (200) is provided with a pin hole (201) and an opening connected to the pin hole (201), wherein the opening includes a limiting area (202), and the edge of the limiting area (202) includes a limiting plane (203), wherein the central axis (111) is used to be embedded in the pin hole (201) through the opening, and the clamping head (122) is used to be embedded in the limiting area (202) to act with the limiting plane (203) to limit the circumferential rotation of the dumbbell pin body (110).

4. The chute assembly according to claim 3, characterized in that: The inner wall of the pin hole (201) is in the shape of an arc that matches the central axis (111), and the width of the limiting area (202) is smaller than the maximum outer diameter of the central axis (111) and larger than the minimum outer diameter of the central axis (111).

5. The chute assembly according to claim 3, characterized in that: The chute (200) comprises a baffle plate chute side (210), a shovel plate chute side (220) and a middle plate (230); The middle plate (230) is located between the baffle plate groove side (210) and the shovel plate groove side (220), and is respectively connected to the baffle plate groove side (210) and the shovel plate groove side (220); The pin hole (201) is provided on both the baffle plate groove side (210) and the shovel plate groove side (220), the dumbbell pin body (110) is used to be embedded in the pin hole (201) of the adjacent chute (200), and the dumbbell pin block (120) acts on the pin hole (201) of one of the adjacent chute (200).

6. The chute assembly according to claim 5, characterized in that: The baffle groove sides (210) of adjacent chutes (200) are plugged into each other; And / or, the shovel plate trough sides (220) of adjacent chutes (200) are plugged into each other.

7. The chute assembly according to claim 5, characterized in that: The middle plate (230) includes a first side edge (231) and a second side edge (232) opposite to each other in the length direction of the chute (200), the first side edge (231) is convex in a direction away from the second side edge (232), and the second side edge (232) is concave in a direction close to the first side edge (231), and the contours of the first side edge (231) and the second side edge (232) are adapted to each other so that the first side edge (231) and the second side edge (232) of adjacent chutes (200) are butted against each other.

8. The chute assembly according to claim 5, characterized in that: The chute (200) further comprises a small tongue plate (240), wherein the baffle plate groove side (210) and the shovel plate groove side (220) are provided with the small tongue plate (240) opposite to each other at the first end in the length direction of the chute (200), and the baffle plate groove side (210) and the shovel plate groove side (220) are provided with tongue plate groove opposite to each other at the second end in the length direction of the chute (200), and the small tongue plate (240) of one of the adjacent chutes (200) is used to be embedded in the tongue plate groove of the other one.

9. The chute assembly according to claim 8, characterized in that: The chute (200) further comprises a tongue plate (250), the small tongue plate (240) and the tongue plate (250) have the same thickness, and both extend outward from the lower surface of the middle plate (230).

10. A scraper conveyor, characterized in that: A chute assembly (200) comprising any one of claims 3 to 9.

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