Graded belt pressing mechanism for self-moving tail of belt conveyor

Abstract

The utility model provides a grading belt pressing mechanism for a self-moving tail of a belt conveyor. At least two stages of belt pressing mechanisms are sequentially arranged in the belt transmission direction. And the belt pressing mechanism presses the belt to gradually reduce the height of the middle part of the belt. The first-stage belt pressing mechanism comprises at least one first-stage belt pressing carrier roller arranged at the position close to a machine tail roller, and the portions, making contact with a belt, of the first-stage belt pressing carrier roller are the bottom edge and two bevel edges of an inverted trapezoid. The second-stage belt pressing mechanism comprises at least one second-stage belt pressing carrier roller which is arranged side by side in the transmission direction, the range of the contact portion of the second-stage belt pressing carrier roller and the belt does not exceed the corresponding belt area on the width of the bottom edge of the inverted trapezoid, and the depth of the contact portion of the second-stage belt pressing carrier roller and the belt is larger than that of the bottom edge of the inverted trapezoid. After multi-stage belt pressing, the cross section of the belt is successfully transited from the plane of the tailstock roller to the belt conveyor carrier roller frame adapting to the depth V of 60 degrees.

Description

Technical Field

[0001] The utility model belongs to the field of belt conveyors, and particularly relates to a grading belt pressing mechanism for a self - moving tail of a belt conveyor. Background Art

[0002] The self - moving tail of a belt conveyor is a mobile device specially designed for fully - mechanized coal mining and tunneling faces in coal mines. It is used in combination with a belt conveyor and a transfer machine to meet the rapid advancement requirements of high - yield and high - efficiency working faces. This device not only has functions such as belt deviation adjustment, height adjustment, and correction of the pushing direction of the transfer machine, but also has the ability to move forward by itself, thus ensuring the smooth progress of the cross - drift transfer. During the use of the self - moving tail of a belt conveyor, it is actually a part of the belt conveyor. The driving part is installed on the head roller of the belt conveyor, which is called the driving roller; the rotating end of the tail is the roller of the self - moving tail of the belt conveyor, and the two rollers support the running belt to transport materials. The self - moving tail of a belt conveyor has a compact structure, can move independently, and forms a complete machine. However, during the use process, it is actually a movable end of the tail of the belt conveyor. It can quickly realize the tensioning and take - up of the belt. The upper belt of the belt conveyor runs from the tail to the head, and the outer surface of the tail roller is a cylindrical shape. After rotation, the upper belt is a plane.

[0003] The middle section of the belt conveyor, that is, the section of the idler support that holds the belt, is generally V - shaped. For the first type, the V - angle formed by three idlers is 35°, and for the second type, the V - angle formed by four idlers is 60°. For the 35° V - shaped section, the existing equipment can meet the belt deformation and transition requirements by means of a belt pressing plate and a transition support. However, for the 60° V - shaped section, the existing design cannot meet the belt pressing and transition requirements. Patent CN203306593U discloses a large - inclination belt pressing device, but this structure cannot be applied to the self - moving tail of a belt conveyor. When the belt pressing is not in place, "ribbon floating" phenomena often occur during the start - up or no - load operation of the belt conveyor, that is, the conveyor belt deviates from the idlers, causing safety accidents such as material spillage and deviation. It will not only cause damage to the belt by rubbing against the supporting U - steel on both sides, but also sprinkle a large amount of floating coal under the belt. The floating coal falling onto the bottom belt may jam the tail of the belt conveyor, posing certain safety hazards. Summary of the Invention

[0004] The utility model provides a grading belt pressing mechanism for a self - moving tail of a belt conveyor.

[0005] The purpose of the utility model is achieved in the following way: A grading belt pressing mechanism for a self - moving tail of a belt conveyor is sequentially provided with at least two - stage belt pressing mechanisms along the belt transmission direction of the self - moving tail of the belt conveyor; the belt pressing mechanism presses down on the belt so that the height of the middle part of the belt gradually decreases.

[0006] An upper belt pressing mechanism and a lower belt pressing mechanism are sequentially arranged along the belt transmission direction of the belt conveyor self - moving tail; the upper belt pressing mechanism includes at least one upper belt pressing idler arranged near the tail roller, and the part of the upper belt pressing idler in contact with the belt is the bottom edge and two inclined edges of an inverted trapezoid, with the upper width of the inverted trapezoid being larger and the bottom width being smaller; the lower belt pressing mechanism includes at least one lower belt pressing idler arranged side by side in the transmission direction, and the range of the part of the lower belt pressing idler in contact with the belt does not exceed the belt area corresponding to the bottom width of the inverted trapezoid, and the depth of the part of the lower belt pressing idler in contact with the belt is greater than the depth of the bottom edge of the inverted trapezoid.

[0007] Both ends of the lower belt pressing idler are in contact with the belt, and the rest positions are not in contact with the belt or are in intermittent contact with the belt.

[0008] The lower belt pressing mechanism includes a mounting frame with both ends arranged on the two - side frames of the belt conveyor self - moving tail, and the lower belt pressing idler is arranged at the middle position of the mounting frame, and the rest positions of the mounting frame are above the belt.

[0009] The lower belt pressing mechanism includes a traveling frame movably arranged on the two - side frames of the belt conveyor self - moving tail, and at least one lower belt pressing idler is arranged at the bottom of the traveling frame.

[0010] Corresponding to each lower belt pressing idler, two downward - extending fixed brackets are arranged on the bottom surface of the traveling frame; both ends of the lower belt pressing idler are rotatably arranged on the corresponding fixed brackets; the lower belt pressing idler is a cylinder with a thinner middle and thicker ends; both ends of the upper belt pressing idler are rotatably arranged on the two - side frames of the belt conveyor self - moving tail; the shape of the upper belt pressing idler is spindle - shaped.

[0011] Along the conveying direction of the belt conveyor self - moving tail, support plate structures with gradually increasing inclination angles are arranged on both sides of the belt groove of the frame facing the belt, and the support plate structures limit the two - end positions of the belt from below the belt.

[0012] The support plate structure includes a first - level support plate, a second - level support plate, and a third - level support plate with gradually increasing inclination angles; the first - level support plate is arranged on the right side of the upper belt pressing idler; the third - level support plate is arranged on the right side of the moving range of the lower belt pressing idler; the first - level support plate is a triangle with a changing inclination angle, the second - level support plate is a rectangle with a constant inclination angle, and the third - level support plate includes a transition plate with a changing inclination angle on the left side and a rectangle plate with a constant inclination angle on the right side; inclined anti - wear rollers are rotatably arranged at the junctions of the first - level support plate and the second - level support plate, and the second - level support plate and the third - level support plate respectively; the circumferential surface of the anti - wear roller in contact with the belt extends beyond the surface of the support plate structure.

[0013] A moving belt pressing plate that presses the belt from above is fixedly arranged at the right end of the walking frame, and a fixed belt pressing plate is also arranged on the frame to the right of the moving belt pressing plate; the moving belt pressing plate and the fixed belt pressing plate include inclined plates that press the two sides of the belt.

[0014] Compared with the prior art, after multi-stage belt pressing in the present utility model, the cross-section of the belt successfully transitions from the plane of the tail frame roller to the idler frame of the belt conveyor adapted to a 60-degree deep V. Description of the Drawings

[0015] Figure 1 It is a cross-sectional view of the prior art.

[0016] Figure 2 It is a structural schematic diagram of the present utility model.

[0017] Figure 3 It is a cross-sectional view of the present utility model.

[0018] Figure 4 It is a primary belt pressing idler.

[0019] Figure 5 It is a bottom view of the walking frame and the secondary belt pressing idler.

[0020] Figure 6 It is the cross-section of the idler frame.

[0021] Among them, 1 is the tail drum, 2 is the primary belt pressing idler, 3 is the secondary belt pressing idler, 4 is the frame, 5 is the walking frame, 50 is the fixed support, 6 is the primary support plate, 7 is the secondary support plate, 8 is the tertiary support plate, 9 is the moving belt pressing plate, 10 is the fixed belt pressing plate, and 11 is the anti-wear roller. Detailed Embodiment

[0022] In the present utility model, unless otherwise clearly specified and defined, the technical terms used in this application shall have the ordinary meanings understood by those skilled in the art of the present utility model. Terms such as "connected", "connected to", "fixed", "arranged", etc. should be understood in a broad sense. It can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium; it can be a mechanical connection or an electrical connection. Unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or indirectly in contact through an intermediate medium. Moreover, the first feature being "above" or "over" or "on top of" the second feature, etc., can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "below" or "beneath" or "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature. Relative terms such as first, second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Terms used in the description such as "center", "lateral", "longitudinal", "length", "width", "thickness", "height", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0023] The technical solution of the present utility model will be clearly and completely described below in conjunction with the drawings and specific embodiments. As Figure 1-6 shown, a belt conveyor self - moving tail grading belt pressing mechanism is provided with at least two - stage belt pressing mechanisms in sequence along the belt driving direction of the belt conveyor self - moving tail; the belt pressing mechanism presses the belt downwards so that the height of the middle part of the belt gradually decreases. By gradually pressing down the belt through multiple - stage belt pressing mechanisms, effective belt pressing can be carried out for belts with a relatively large inclination angle and a relatively deep middle position.

[0024] An upper belt pressing mechanism and a lower belt pressing mechanism are sequentially arranged along the belt transmission direction of the self - moving tail of the belt conveyor; the upper belt pressing mechanism includes at least one upper belt pressing idler 2 arranged near the tail roller 1. The part of the upper belt pressing idler 2 in contact with the belt is the bottom edge and two inclined edges of an inverted trapezoid, with the width of the upper side of the inverted trapezoid being larger and the width of the bottom edge being smaller; the lower belt pressing mechanism includes at least one lower belt pressing idler 3 arranged side by side in the transmission direction. The range of the part of the lower belt pressing idler 3 in contact with the belt does not exceed the belt area corresponding to the width of the bottom edge of the inverted trapezoid, and the depth of the part of the lower belt pressing idler 3 in contact with the belt is greater than the depth of the bottom edge of the inverted trapezoid. Here, the depth refers to the downward height; the greater the depth, the greater the downward height, and the lower the belt is pressed. The width area of the inverted trapezoid corresponds to the middle part of the belt, and the part of the lower belt pressing idler 3 in contact with the belt is also in this position of the belt or does not exceed this position, so as to further press the middle part of the belt. The depths of the idlers of the same level of belt pressing are the same, and preferably the structures are also the same. A multi - level belt pressing mechanism is arranged on the self - moving tail of the belt conveyor. The first - level belt pressing mechanism presses the belt into an inverted trapezoid shape with a larger upper side and a smaller bottom side, which can also be said to be a shallow V shape; after passing through the second - level belt pressing mechanism, the middle position of the belt is further pressed down to form an inverted trapezoid shape with a greater depth, or a deep V shape; finally, the angles of the two inclined surfaces of the inverted trapezoid are close to the angles required by the belt idler, for example, close to 60 degrees, to meet the use requirements. The upper belt pressing idler 2 and the lower belt pressing idler 3 can be fixedly arranged or rotatably arranged. It can also be set into a structure that can adjust the vertical distance. The specific adjustment structure adopts the existing technology and will not be described in detail. In fact, both the upper belt pressing mechanism and the lower mechanism are arranged as close as possible to the tail roller 1 to facilitate belt pressing as early as possible.

[0025] The two ends of the lower belt pressing idler 3 are in contact with the belt, and the rest of the position is not in contact with the belt or is in intermittent contact with the belt. The contact at the two ends with the belt can determine the width range of the belt being pressed down. The middle part is not in contact with the belt or is in intermittent belt pressing, so as to reduce the contact area, thereby reducing the resistance and increasing the pressure, which is convenient for pressing down the belt.

[0026] The lower belt pressing mechanism includes a mounting frame with both ends arranged on the two - side frames 4 of the self - moving tail of the belt conveyor. The lower belt pressing idler 3 is arranged at the middle position of the mounting frame, and the rest of the mounting frame is above the belt. The shape of the mounting frame can be various as long as it is ensured not to be in contact with the belt. For example, the mounting frame includes two inverted and symmetrically arranged L - shaped brackets, and the lower belt pressing idler 3 is arranged in the middle of the L - shaped brackets; there are also other structures as long as the requirements are met. The second belt pressing idler can be fixedly arranged on the mounting frame or rotatably arranged on the mounting frame.

[0027] The secondary belt pressing mechanism includes a walking frame 5 movably arranged on the two side frames 4 of the self - moving tail of the belt conveyor. At least one secondary belt pressing roller 3 is arranged at the bottom of the walking frame 5. There is a walking frame 5 on the self - moving tail of the belt conveyor, and the walking frame 5 is connected to the transfer machine. When the transfer machine moves a certain distance, such as within a distance of more than 2 meters, the walking frame 5 moves on the self - moving tail of the belt conveyor without the need to move the self - moving tail of the belt conveyor. The walking frame 5 is a conventional structure. Arranging the second belt pressing roller on the walking frame 5 can utilize the existing structure, saving space and cost. Of course, the mounting frame can also be arranged at other positions of the self - moving tail of the belt conveyor, and the second belt pressing roller is arranged on the mounting frame, and these are all within the protection scope of the present utility model. However, because there are a moving walking frame 5 and a transfer machine above the self - moving tail of the belt conveyor, the space is limited and it is easy to interfere with the mounting frame. Therefore, it is preferably that the secondary belt pressing roller 3 is arranged below the walking frame 5 and connected to the walking frame 5, and reciprocally moves a certain distance along with the walking frame 5.

[0028] Corresponding to each secondary belt pressing roller 3, two downward - facing fixed brackets 50 are arranged on the bottom surface of the walking frame 5; both ends of the secondary belt pressing roller 3 are rotatably arranged on the corresponding fixed brackets 50; the secondary belt pressing roller 3 is a cylinder with a thinner middle part and thicker ends; both ends of the primary belt pressing roller 2 are rotatably arranged on the two side frames 4 of the self - moving tail of the belt conveyor; the shape of the primary belt pressing roller 2 is spindle - shaped. The secondary belt pressing roller 3 is a cylinder with a thinner middle part and thicker ends, which can effectively increase the pressure and facilitate pressing down the belt. The fixed brackets 50 are arranged at positions close to the middle on the bottom surface of the walking frame 5 and will not interfere with the inclined parts at both ends of the belt. The secondary belt pressing roller 3 of the fixed brackets 50 can be rotatably connected through bearings. Both ends of the primary belt pressing roller 2 can be rotatably arranged on the frame 4 of the self - moving tail through bearings or other means. The rotatable arrangement can greatly reduce the friction force received by the belt and prevent or reduce the wear of the belt. The fixedly arranged primary belt pressing roller can only have the shape of the part in contact with the belt. The rotatably arranged primary belt pressing roller 2 needs to have the shape of the entire cylinder or cone part to contact and press the belt. Both the fixed arrangement and the rotatable arrangement are within the protection scope of the present utility model.

[0029] Along the conveying direction of the self - moving tail of the belt conveyor, on both sides of the belt groove of the frame 4 facing the belt, a support plate structure with an increasingly larger inclination angle is arranged to limit the positions of both ends of the belt from below the belt.

[0030] Furthermore, the support plate structure includes a primary support plate 6, a secondary support plate 7, and a tertiary support plate 8 with gradually increasing inclination angles; the primary support plate 6 is arranged on the right side of the primary belt holding roller 2; the tertiary support plate 8 is arranged on the right side of the moving range of the secondary belt holding roller 3; the primary support plate 6 is a triangle with a changing inclination angle, the secondary support plate 7 is a rectangle with a constant inclination angle, and the tertiary support plate 8 includes a transition plate with a changing inclination angle on the left side and a rectangular plate with a constant inclination angle on the right side; the intersection of the primary support plate 6 and the secondary support plate 7, and the intersection of the secondary support plate 7 and the tertiary support plate 8 are respectively rotated to set an inclined anti-wear roller 11; the circumferential surface of the anti-wear roller 11 in contact with the belt exceeds the surface of the support plate structure. Among them, the primary support plate 6 is a triangle, which cooperates with the primary belt holding roller 2 to force the belt to be limited, and the transition from a plane to a shallow V, and the angle can be changed from 0 to 45. The secondary support plate 7 is a rectangle, and the angle between it and the middle plate, that is, the bottom surface of the belt groove, is about 45°. The third-level support plate 8 is composed of two plates, the left plate serves as an angle transition connection, and the right plate is at an angle of 55-60° with the middle plate, and the position forward along the transmission direction of the belt is the right side, as shown in the attached figure. The cylindrical top surface of the anti-wear roller 11 that contacts the belt is slightly higher than the support plate. It will contact the belt before the support plate, reducing the running resistance of the belt and reducing the wear of the belt.

[0031] A mobile belt pressing plate 9 for pressing the belt from above is fixedly arranged at the right end of the traveling frame 5, and a fixed belt pressing plate 10 is also arranged on the right side of the mobile belt pressing plate 9 on the frame 4; the mobile belt pressing plate 9 and the fixed belt pressing plate 10 include inclined plates for pressing the belt on both sides of the belt. The mobile belt pressing plate 9 and the fixed belt pressing plate 10 are used to press the belt, limit the height of the belt, and prevent the occurrence of streamers. The edge of the inclined plate is provided with a hemmed round steel, and the mobile belt pressing plate 9 is within the range of movement of the traveling frame 5 and is not at the angle change point, so there is no tilting. The fixed belt pressing plate 10 can be arranged above the tertiary support plate 8, and the tilt angle corresponds to the tertiary support plate 8. The mobile belt pressing plate 9 is located above the secondary support plate 7, and the tilt angle corresponds to the secondary support plate 7. The left end of the fixed belt pressing plate 10 is located at the junction of the secondary support plate 7 and the tertiary support plate 8, and the left end is tilted to facilitate the belt entry.

[0032] In specific implementation, the belt comes out from the tail drum 1 and passes through the first-stage belt pressing roller 2 to be pressed into a shallow V shape or a shallow inverted trapezoid, and then passes through the first support plate and the second support plate; and then passes through the second belt pressing roller to be pressed into a 60-degree deep V shape or an inverted trapezoid. The belt after being pressed is further stabilized by the second-stage support plate 7 and the mobile belt pressing plate 9, and then passes through the third-stage support plate 8 and the fixed belt pressing plate 10 with a larger angle to the right, and finally the belt reaches the roller frame of the belt conveyor. After passing through multiple stages of belt pressing, the belt section successfully transitions from the plane of the tail drum to the belt conveyor roller frame that adapts to the 60-degree deep V.

[0033] The technical features of the above-described embodiments can be combined arbitrarily. As long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification. Without departing from the overall concept of the present utility model, several changes and improvements made according to the technical solution of the present utility model and equivalent substitution or modification should also be regarded as the protection scope of the present utility model.

Claims

1. A belt conveyor self-moving tail graded belt pressing mechanism, characterized in that: At least two levels of belt pressing mechanisms are arranged in sequence along the belt transmission direction of the self-moving tail of the belt conveyor; the belt pressing mechanism presses down the belt so that the height of the middle part of the belt gradually decreases.

2. According to claim 1, a belt conveyor self-moving tail graded belt pressing mechanism is characterized in that: A primary belt pressing mechanism and a secondary belt pressing mechanism are sequentially arranged along the belt transmission direction of the self-moving tail of the belt conveyor; the primary belt pressing mechanism includes at least one primary belt pressing roller arranged near the tail roller, and the contact portion between the primary belt pressing roller and the belt is the bottom side and two oblique sides of an inverted trapezoid, the upper side of the inverted trapezoid has a large width and the bottom side has a small width; the secondary belt pressing mechanism includes at least one secondary belt pressing roller arranged side by side in the transmission direction, the contact portion between the secondary belt pressing roller and the belt does not exceed the belt area corresponding to the width of the bottom side of the inverted trapezoid, and the depth of the contact portion between the secondary belt pressing roller and the belt is greater than the depth of the bottom side of the inverted trapezoid.

3. According to claim 2, a belt conveyor self-moving tail graded belt pressing mechanism is characterized in that: The two end positions of the secondary belt pressing roller are in contact with the belt, and the remaining positions are not in contact with the belt or are in contact with the belt at intervals.

4. According to claim 2, a belt conveyor self-moving tail graded belt pressing mechanism is characterized in that: The secondary belt pressing mechanism comprises a mounting frame with two ends arranged on the frames on both sides of the tail of the belt conveyor, the secondary belt pressing roller is arranged in the middle position of the mounting frame, and the rest of the mounting frame is above the belt.

5. According to claim 2, a belt conveyor self-moving tail graded belt pressing mechanism is characterized in that: The secondary belt pressing mechanism comprises a traveling frame movably arranged on the frames on both sides of the tail of the belt conveyor, and at least one secondary belt pressing roller is arranged at the bottom of the traveling frame.

6. The belt conveyor self-moving tail graded belt pressing mechanism according to claim 5, characterized in that: Corresponding to each secondary belt holding roller, two downward fixed brackets are arranged on the bottom surface of the walking frame; the two ends of the secondary belt holding roller are rotatably arranged on the corresponding fixed brackets; the secondary belt holding roller is a cylinder with a thin middle and thick ends; the two ends of the primary belt holding roller are rotatably arranged on the frames on both sides of the tail of the belt conveyor; the shape of the primary belt holding roller is a spindle.

7. The belt conveyor self-moving tail graded belt pressing mechanism according to claim 5, characterized in that: Along the conveying direction of the self-moving tail of the belt conveyor, support plate structures with gradually increasing inclination angles are arranged on both sides of the belt groove of the frame facing the belt, and the support plate structures limit the positions of the two ends of the belt from below the belt.

8. The belt conveyor self-moving tail graded belt pressing mechanism according to claim 7, characterized in that: The support plate structure includes a primary support plate, a secondary support plate, and a tertiary support plate with gradually increasing inclination angles; the primary support plate is arranged on the right side of the primary belt holding roller; the tertiary support plate is arranged on the right side of the moving range of the secondary belt holding roller; the primary support plate is a triangle with a changing inclination angle, the secondary support plate is a rectangle with a constant inclination angle, and the tertiary support plate includes a transition plate with a changing inclination angle on the left side and a rectangular plate with a constant inclination angle on the right side; inclined anti-wear rollers are rotatably arranged at the junctions of the primary support plate and the secondary support plate, and at the junctions of the secondary support plate and the tertiary support plate, respectively; the circumferential surface of the anti-wear roller in contact with the belt exceeds the surface of the support plate structure.

9. The belt conveyor self-moving tail graded belt pressing mechanism according to claim 5, characterized in that: A mobile belt pressing plate for pressing the belt from above is fixedly arranged at the right end of the traveling frame, and a fixed belt pressing plate is also arranged on the frame to the right of the mobile belt pressing plate; the mobile belt pressing plate and the fixed belt pressing plate include inclined plates for pressing the belt on both sides.

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