Chain tensioner for flight conveyors

Abstract

The application discloses a scraper conveyor chain tensioning device and relates to the technical field of coal mine equipment maintenance. The scraper conveyor chain tensioning device comprises two limiting units and an adjusting piece. The limiting unit comprises a plate body, a connecting piece arranged on the plate body and a limiting plate. A plurality of limiting plates are arranged on the plate body. The two limiting units are used for being connected with two scrapers and enabling the limiting plates of the two limiting units to be in abutting cooperation with the two scrapers. The length of the adjusting piece is adjustable. The two ends of the adjusting piece are connected with the connecting pieces on the two limiting units respectively. The adjusting piece is used for driving the two limiting units to move in the direction of approaching each other and adjusting the distance between the two scrapers so as to tension the chain. The scraper conveyor chain tensioning device can quickly realize the tensioning of the chain, facilitates the dismounting and connecting of the chute and avoids the deformation of the scraper in the chain tensioning operation, thereby improving the chain tensioning efficiency.

Description

Technical Field

[0001] This invention relates to the field of coal mine equipment maintenance technology, specifically to a chain tightening device for a scraper conveyor. Background Technology

[0002] In coal mine tunneling, scraper conveyors are commonly used to transport coal. The scraper chain is a crucial tool for transporting coal from the working face, and its tension directly affects the operation of the scraper conveyor. Frequent disassembly and reassembly of the chute are necessary to ensure the tightness of the scraper chain. In some technologies, a hand-operated hoist is used to directly attach to two adjacent scrapers. Pulling the hoist applies force to the scraper, tensioning the entire chain, allowing for connection or disconnection of the chain between the two scrapers. However, when tensioning the chain with a hand-operated hoist, it's impossible to control the connection point between the hoist and the scraper. Furthermore, the concentrated force on the scraper can easily cause deformation, requiring replacement and increasing labor and time. Additionally, if one end of the hoist detaches from the scraper, it can easily cause injury to personnel, resulting in a low safety factor. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, this invention proposes a chain tensioning device for scraper conveyors. This device can quickly tension the chain, facilitating the disassembly and reassembly of the chute, preventing deformation of the scraper during chain tensioning, and improving chain tensioning efficiency.

[0005] The scraper conveyor chain tightening device of this embodiment includes:

[0006] Two limiting units are provided, each limiting unit comprising a plate, a connector, and a limiting plate. The connector is disposed on the plate, and the limiting plate is disposed on one side of the plate and is provided at intervals along a first direction. Each limiting plate includes a vertical section and a horizontal section. The vertical section is perpendicular to the plate, and the horizontal section is parallel to the plate and is disposed on the side of the vertical section closer to the connector. The limiting plate in the two limiting units is used for the two scrapers to stop and cooperate.

[0007] An adjusting member, the length of which is adjustable, is connected at both ends to the connecting members on the two limiting units respectively. The adjusting member is used to drive the two limiting units to move closer to each other and adjust the distance between the two scrapers to tension the chain.

[0008] The chain tensioning device for scraper conveyors in this embodiment of the invention can quickly tension the chain, facilitating the disassembly and reassembly of the chute, preventing the scraper from deforming during chain tensioning, and improving chain tensioning efficiency.

[0009] In some embodiments, at least two of the plurality of limiting plates are slidably disposed on the plate body along the first direction, and two first grooves are provided at intervals along the first direction on the plate body. The vertical segment is slidably disposed through the first groove. The limiting plate includes a stop segment, which is disposed at one end of the plate body opposite to the horizontal segment and cooperates with the plate body to stop.

[0010] In some embodiments, the limiting plate is provided with at least three, and the plate body is provided with a second groove located between two of the first grooves. The vertical segment is slidably provided in the second groove along a second direction perpendicular to the first direction, and the length of the second groove is equal to the dimension of the vertical segment in the first direction.

[0011] In some embodiments, a stop bolt is included, which is correspondingly disposed with the limiting plate and threadedly connected to the stop section, with the other end of the stop bolt abutting against the plate body.

[0012] In some embodiments, two horizontal segments are provided in parallel, the vertical segment and the horizontal segment are integrally formed and arranged in a U-shape, and one of the two horizontal segments closer to the plate is fixedly connected to the plate.

[0013] In some embodiments, the connector includes a first rod and a second rod arranged at an angle, wherein the angle between the first rod and the second rod is not less than 60° and not greater than 120°.

[0014] In some embodiments, the plate body is provided with two connecting grooves corresponding to the first rod and the second rod. The two connecting grooves form an angle equal to that of the plate body, and the extension lines of the two connecting grooves intersect. Part of the first rod and part of the second rod are respectively connected to the two connecting grooves.

[0015] In some embodiments, the connector includes an arcuate segment disposed between the first rod and the second rod, wherein the first rod, the arcuate segment, and the second rod are integrally formed.

[0016] In some embodiments, the first rod and the second rod are of the same length, and the first rod and the second rod are symmetrically arranged on both sides of the line connecting the arc segment and the plate.

[0017] In some embodiments, the adjusting member is a hand chain hoist, or the adjusting member includes a turnbuckle, at least one end of which is connected to the connecting member by a chain. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the chain tensioning device of the scraper conveyor according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the limiting unit in the chain tightening device of the scraper conveyor according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the limiting unit in the chain tightening device of a scraper conveyor according to another embodiment of the present invention.

[0021] Figure label:

[0022] Limiting unit 1; plate 11; first groove 111; second groove 112; connecting groove 113; connector 12; first rod 121; second rod 122; arc segment 123; limiting plate 13; vertical segment 131; horizontal segment 132; stop segment 133;

[0023] Adjusting component 2;

[0024] Stop bolt 3. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the chain tensioning device of the scraper conveyor in this embodiment of the invention includes two limiting units 1 and an adjusting member 2. The limiting unit 1 includes a plate 11, a connecting member 12, and a limiting plate 13. The length direction of the plate 11 is defined as the first direction. The connecting member 12 is disposed on the plate 11. The limiting plate 13 is disposed on one side of the plate 11 and is provided in multiples at intervals along the first direction. The limiting plate 13 includes a vertical section 131 and a horizontal section 132. The vertical section 131 is arranged perpendicular to the plate 11, and the horizontal section 132 is arranged parallel to the plate 11 and is disposed on the side of the vertical section 131 near the connecting member 11. The two limiting units 1 are used to connect with two scrapers and make the limiting plate 13 in the two limiting units 1 stop and cooperate with the two scrapers in a direction that approaches each other. The length of the adjusting member 2 is adjustable. The two ends of the adjusting member 2 are respectively connected to the connecting member 12 on the two limiting units 1. The adjusting member 2 is used to drive the two limiting units 1 to move in a direction that approaches each other and adjust the distance between the two scrapers to tension the chain.

[0027] In use, the chain tensioning device of the scraper conveyor in this embodiment of the invention connects two limiting units 1 to two scrapers. The vertical section 131, the horizontal section 132, and the plate 11 together form a limiting groove. When the limiting unit 1 is connected to the scraper, the scraper can be accommodated in the limiting groove to prevent the connection between the limiting plate 13 and the scraper from slipping, thereby enhancing the connection stability when the limiting plate 13 is connected to the baffle and ensuring safety during use. Multiple limiting plates 13 are connected to the scrapers at the same time, increasing the force-bearing area on the scrapers and preventing the scrapers from deforming due to force concentration. By shortening the length of the adjusting member 2, the limiting unit 1 drives the two scrapers to move closer to each other, thereby tensioning the entire chain, so as to facilitate the chain connection or disconnection operation between the two scrapers.

[0028] The chain tensioning device for the scraper conveyor in this embodiment of the invention has a simple structure, is easy to carry, and can quickly tension the chain, making it convenient to disassemble and reassemble the chute. At the same time, by setting multiple limiting plates 13, the force-bearing area between the plate body 11 and the scraper is increased, which avoids the scraper from being deformed due to concentrated force during chain tensioning, thereby improving the chain tensioning efficiency.

[0029] Optionally, the plate 11 is made of a steel plate with a length of 400mm, a width of 300mm, and a thickness of 10mm.

[0030] Optionally, the limiting plates 13 may be provided in two, three, or four.

[0031] In some embodiments, such as Figure 1 and Figure 2 As shown, at least two of the multiple limiting plates 13 are slidably disposed on the plate body 11 along the first direction. Two first grooves 111 are provided at intervals along the first direction on the plate body 11. The vertical section 131 is slidably disposed through the first groove 111. The limiting plate 13 includes a stop section 133, which is disposed at one end of the plate body 11 away from the horizontal section 132 and is engaged with the plate body 11 for stopping.

[0032] By setting the first groove 111, the vertical section 131 slides in the first groove 111 to adjust the position of the limiting plate 13. Adjusting the position of the limiting plate 13 in the first direction increases or decreases the connection length when the limiting plate 13 is connected to the scraper, thereby decomposing the force on the scraper and avoiding deformation of the scraper due to local force. At the same time, the limiting unit 1 can be adapted to scrapers of different lengths.

[0033] Optionally, there may be two, three or four limiting plates 13, all of which are slidably disposed on the plate body 11 along the first direction.

[0034] Optionally, there are three or four limiting plates 13, and two of the three or four limiting plates 13 located at both ends are slidably disposed on the plate body 11 along the first direction.

[0035] Optionally, a rib is provided on the side of the plate 11 opposite to the horizontal section 132 corresponding to the first groove 111. The rib extends along the width direction of the plate 11 to increase the structural strength of the plate 11.

[0036] Optionally, a damping pad is provided in the first groove 111. The damping pad is used to increase the friction of the vertical section 131 sliding in the first direction in the first groove 111, so as to facilitate the adjustment of the position of the vertical section 131 in the first groove 111.

[0037] In some embodiments, such as Figure 1 and Figure 2 As shown, the thickness direction of the plate 11 is defined as the second direction, which is perpendicular to the first direction. The limiting plate 13 is provided with at least three. The plate 11 is provided with a second groove 112 located between two first grooves 111. A vertical section 131 is slidably provided in the second groove 112 along the second direction, and the length of the second groove 112 is equal to the dimension of the vertical section 131 in the first direction.

[0038] By setting a second groove 112, the length of the second groove 112 is equal to the dimension of the vertical segment 131 in the first direction. The vertical segment 131 set in the second groove 112 can only slide along the second direction. The vertical segment 131 in the second groove 112 can be used as a reference point to adjust other vertical segments 131 on the plate 11 that slide along the second direction, which facilitates the adjustment of the interval between multiple limiting plates 13.

[0039] In some embodiments, such as Figure 1 and Figure 2 As shown, it includes a stop bolt 3, which is correspondingly provided with the limiting plate 13 and is threadedly connected to the stop section 133. The other end of the stop bolt 3 abuts against the plate 11. By rotating the stop bolt 3, the vertical section 131 moves relative to the plate 11 in the second direction, thereby adjusting the distance between the horizontal section 132 and the plate 11.

[0040] Optionally, a slider is rotatably provided on the side of the stop bolt 3 near the plate 11. The plate 11 is provided with a slide rail extending in the first direction. The slider is slidably disposed on the slide rail, and in the second direction, the slider and the slide rail stop each other. At the same time, the slide rail limits the end of the stop bolt 3 in the width direction of the plate through the slider, which can improve the support strength of the plate 11 for the vertical section 131 and facilitate the connection between the limiting plate 13 and the scraper.

[0041] In some embodiments, such as Figure 3As shown, two horizontal segments 132 are provided in parallel. The vertical segment 131 and the horizontal segment 132 are integrally formed and arranged in a U-shape. One of the two horizontal segments 132 closer to the plate 11 is fixedly connected to the plate 11. The limiting plate 13 is set as an integrally formed U-shaped structure to increase the connection strength between the limiting plate 13 and the plate 11, prevent the vertical segment 131 from bending or deforming during use and slipping off the scraper, and ensure the reliability of the connection between the limiting unit 1 and the scraper.

[0042] Optionally, a reinforcing rib is provided at the end of the vertical section 131 that is away from the horizontal section 132 to ensure the connection strength between the vertical section 131 and the plate 11 and to prevent bending and deformation during use.

[0043] In some embodiments, such as Figure 1 and Figure 2 As shown, the connector 12 includes a first rod 121 and a second rod 122 arranged at an angle. The angle between the first rod 121 and the second rod 122 is not less than 60° and not greater than 120°. With the lengths of the first rod 121 and the second rod 122 being fixed, the angle between the first rod 121 and the second rod 122 is set to control the connection position between the first rod 121 and the second rod 122 and the plate 11, avoid local stress on the plate 11, and ensure the connection strength between the connector 12 and the plate 11.

[0044] Optionally, the angle between the first rod 121 and the second rod 122 is 60°, 90°, or 120°.

[0045] In some embodiments, such as Figure 1 and Figure 2 As shown, the plate 11 has two connecting grooves 113 corresponding to the first rod 121 and the second rod 122. The width of the connecting grooves 113 is the same as the diameter of the first rod 121 and the second rod 122. The angles formed by the two connecting grooves 113 and the plate 11 are equal and the extension lines of the two connecting grooves 113 intersect. Part of the first rod 121 and part of the second rod 122 are respectively connected to the two connecting grooves 113.

[0046] A connecting groove 113 is provided on the plate 11, and the first rod 121 and the second rod 122 are respectively partially welded into the connecting groove 113 to increase the connection strength of the first rod 121 and the second rod 122. When the adjusting member 2 pulls the two limiting units 1, the force point on the plate 11 is reduced relative to the scraper, so as to avoid the limiting plate 13 and the scraper from slipping off the stop fit and ensure the reliability of the connection.

[0047] In some embodiments, such as Figure 1 and Figure 2As shown, the connector 12 includes an arc-shaped segment 123 disposed between the first rod 121 and the second rod 122. The first rod 121, the arc-shaped segment 123 and the second rod 122 are integrally formed, which increases the connection strength between the first rod 121 and the second rod 122, avoids the connection position between the first rod 121 and the second rod 122 from breaking, and improves the safety during use.

[0048] Optionally, the first rod 121, the second rod 122, and the arc segment 123 are formed by bending a single steel bar.

[0049] In some embodiments, such as Figure 1 and Figure 2 As shown, the first rod 121 and the second rod 122 are of the same length, and the first rod 121 and the second rod 122 are symmetrically arranged on both sides of the line connecting the arc segment 123 and the plate 11. The symmetrical arrangement of the first rod 121 and the second rod 122 facilitates the decomposition of the tensile force transmitted on the connector 12, thereby making the plate 11 subjected to uniform force and avoiding deformation of the connector 12 or the plate 11.

[0050] In some embodiments, the adjusting member 2 is a hand chain hoist, which is easy to operate and allows for easy adjustment of the length, thereby adjusting the distance between the two connecting members 12.

[0051] In some embodiments, the adjusting member 2 includes a turnbuckle, with at least one end of the turnbuckle connected to the connecting member 12 by a chain. The chain is connected to one or both ends of the turnbuckle to ensure the usable length of the adjusting member 2. By adjusting the usable length of the turnbuckle, the distance between the two limiting units 1 can be adjusted, and the two scrapers can be driven to move closer to each other through the limiting units 1 to shorten the distance between the two scrapers, thereby achieving the tensioning of the chain. The operation is convenient and reliable.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A chain tensioning device for a scraper conveyor, characterized in that, include: Two limiting units are provided, each limiting unit comprising a plate, a connector, and a limiting plate. The length direction of the plate is a first direction. The connector is disposed on the plate. The limiting plate is disposed on one side of the plate and is provided at intervals along the first direction. The limiting plate includes a vertical section and a horizontal section. The vertical section is perpendicular to the plate and the horizontal section is parallel to the plate and is disposed on the side of the vertical section closer to the connector. The limiting plate in the two limiting units is used for the two scrapers to stop and cooperate. An adjusting member, the length of which is adjustable, and the two ends of which are respectively connected to the connecting members on the two limiting units. The adjusting member is used to drive the two limiting units to move closer to each other and adjust the distance between the two scrapers to tension the chain. At least two of the plurality of limiting plates are slidably disposed on the plate body along the first direction. Two first grooves are spaced apart on the plate body along the first direction. The vertical section is slidably disposed through the first groove. The limiting plate includes a stop section. The stop section is disposed at one end of the plate body opposite to the horizontal section and cooperates with the plate body to stop. The thickness direction of the plate is the second direction, and at least three limiting plates are provided. The plate is provided with a second groove located between two first grooves. The vertical segment is slidably provided in the second groove along the second direction perpendicular to the first direction, and the length of the second groove is equal to the dimension of the vertical segment in the first direction. It also includes a stop bolt, which is correspondingly provided with the limiting plate and is threadedly connected to the stop section. The other end of the stop bolt abuts against the plate body. A slider is rotatably provided on the side of the stop bolt near the plate body. A slide rail is provided on the plate body extending in a first direction. The slider is slidably provided on the slide rail, and in a second direction, the slider and the slide rail are stopped and engaged.

2. The chain tensioning device for a scraper conveyor according to claim 1, characterized in that, The connector includes a first rod and a second rod arranged at an angle, wherein the angle between the first rod and the second rod is not less than 60° and not greater than 120°.

3. The chain tensioning device for a scraper conveyor according to claim 2, characterized in that, The plate has two connecting grooves corresponding to the first rod and the second rod. The two connecting grooves form an angle with the plate and the extension lines of the two connecting grooves intersect. Part of the first rod and part of the second rod are respectively connected to the two connecting grooves.

4. The chain tensioning device for a scraper conveyor according to claim 2, characterized in that, The connector includes an arc-shaped segment disposed between the first rod and the second rod, and the first rod, the arc-shaped segment, and the second rod are integrally formed.

5. The chain tensioning device for a scraper conveyor according to claim 4, characterized in that, The first rod and the second rod are of the same length, and the first rod and the second rod are symmetrically arranged on both sides of the line connecting the arc segment and the plate.

6. The chain tensioning device for a scraper conveyor according to claim 1, characterized in that, The adjusting component is a hand chain hoist, or the adjusting component includes a turnbuckle, and at least one end of the turnbuckle is connected to the connecting component by a chain.

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