Anti-floating pad frame

Abstract

The utility model provides an anti-drifting pad frame for reducing coal pushing resistance and preventing deviation and drifting for a head or a tail of a scraper conveyor, which comprises a pad frame, the left side of the pad frame is arranged below the head or the tail of the scraper conveyor, and the right side of the pad frame is arranged below a power part; the cushion frame is integrally bent in the left-right direction, and the bent cushion frame forms an inclined face with the high middle and the two low ends. The highest position of the cushion frame is located at the boundary of the machine head or the machine tail and the power part. The angle of the inclined plane below the power part can effectively reduce the deflection of the whole cushion frame towards the right side of the power part; the angle of the inclined plane below the machine head or the machine tail can ensure that the left side of the cushion frame has a certain preset bottom pricking angle when the cushion frame translates and pushes towards the left side, so that the floating and slipping phenomenon is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of coal mining, and particularly relates to an anti-floating scraper conveyor support frame. Background Art

[0002] In a fully-mechanized caving face in a coal mine, equipment such as hydraulic supports and scraper conveyors are arranged. The scraper conveyor is pushed towards the coal wall by the thrust of the hydraulic support to overcome the pushing resistance. One is to enable the shearer to continuously cut coal and feed the cutter; the other is to clean the floating coal on the shearer roadway. During normal advancement, the middle trough moves forward along the bottom plate cut by the shearer, but sometimes abnormal phenomena occur: during the pushing process of the middle trough, the coal plow fails to clean the floating coal on the surface of the bottom plate, resulting in the middle trough floating on the floating coal. As the conveyor continuously advances, the floating coal at the bottom of the middle trough accumulates thicker and thicker until normal coal mining cannot be carried out, which is called floating scraper. Floating scraper is related to many factors such as the hardness and softness of the bottom plate, uphill and downhill mining, and the structure of the scraper conveyor. Among them, the hydraulic support will improve the floating scraper situation by changing the push rod structure, and the middle trough will change the coal plow angle and the pushing point angle, etc. There is no coal plow angle set at the head and tail of the scraper conveyor, so it is easy to float.

[0003] Due to the uneven sinking of the power unit, the non-power unit side of the head and tail of the scraper conveyor will be upturned, resulting in floating coal penetrating under the bottom plates of the head and tail of the scraper conveyor. This causes the scraper conveyor to be unable to dig into the bottom to shovel coal during the pushing process and unable to smoothly shovel the floating coal into the scraper conveyor for transportation. Patent CN219729516U discloses a pushing part with an anti-uneven-sinking function, in which the left pushing beam is located below the head and the power unit. A limiting mechanism is arranged at the left end of the left pushing beam, and an inclined downward bottom plate is arranged on the right half. Through this structure, uneven sinking towards the power unit side, that is, the right side, is prevented. However, in the comparative document, the left side of the left pushing beam pushes the coal seam through the limiting device, and the limiting device and the left pushing beam are only connected by pins and bolts. Under the large reaction force of pushing coal, it is very easy to be damaged and requires repeated maintenance. Moreover, there is a certain distance between the bottom surface of the left half of the left pushing beam, the bottom surface of the limiting device, and the bottom surface of the right half. There is also a step at the connection between the bottom surface of the left half and the bottom surface of the right half. This structure will cause a large coal pushing resistance during the movement of the left pushing beam on the right half. Summary of the Invention

[0004] The utility model provides an anti-floating scraper conveyor support frame for the head or tail of a scraper conveyor, which reduces the coal pushing resistance, prevents uneven sinking and floating.

[0005] The purpose of the utility model is achieved in the following way: an anti-floating scraper conveyor support frame includes a support frame. The left side of the support frame is arranged below the head or tail of the scraper conveyor, and the right side of the support frame is arranged below the power unit; the support frame is integrally bent in the left-right direction, and after bending, the support frame forms an inclined surface that is high in the middle and low at both ends.

[0006] The highest position of the cushion rack is at the boundary between the machine head or the machine tail and the power unit.

[0007] The bent part of the cushion rack forms an arc surface, and the highest position of the arc surface is at the boundary between the machine head or the machine tail and the power unit; the cushion racks at both ends of the arc surface are respectively tangent to the corresponding connecting ends of the arc surface.

[0008] A support part is fixedly arranged between the power unit and the cushion rack below it.

[0009] Upper connecting parts for cooperating with the machine head or the machine tail are respectively arranged on the left side and the right side of the left half of the cushion rack, and a positioning hole for cooperating with the machine head or the machine tail is arranged at the middle position of the left half plate of the cushion rack.

[0010] Compared with the prior art, in the utility model, the bent cushion rack forms an inclined surface with a high middle and low ends. The inclined surface angle below the power unit can effectively reduce the overall sinking of the cushion rack towards the right where the power unit is located; the inclined surface angle below the machine head or the machine tail can ensure that when the cushion rack is translated and pushed to the left, there is a certain preset angle for the cushion rack to sink to the bottom on the left side, avoiding the phenomenon of drifting. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the advancement of the head or tail part of a scraper conveyor.

[0012] Figure 2 It is a schematic diagram of the head or tail, the power unit and the cushion rack of a scraper conveyor.

[0013] Figure 3 It is a three-dimensional schematic diagram of the cushion rack.

[0014] Figure 4 It is a schematic diagram of the head or tail (excluding the power unit).

[0015] Figure 5 It is a front view of the cushion rack.

[0016] Figure 6 It is an overall front view.

[0017] Among them, 1 is the machine tail (or the machine head), 2 is the power unit, 3 is the cushion rack, 4 is the support part, 5 is the pushing ear, 11 is the upper connecting part, 12 is the positioning pin shaft, 31 is the lower connecting part, and 32 is the positioning hole. Detailed Embodiment

[0018] In the present utility model, unless otherwise clearly defined and limited, 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, which 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 defined and limited, the first feature being "on" or "under" 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 has a higher horizontal height than the second feature. The first feature being "under" 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 has 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, and are 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.

[0019] 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 1-6As shown, an anti-drift mat rack includes a mat rack 3. The left side of the mat rack 3 is arranged below the head or tail 1 of a scraper conveyor, and the right side of the mat rack 3 is arranged below the power unit 2. The mat rack 3 is integrally bent in the left-right direction. After bending, the mat rack 3 forms an inclined surface that is high in the middle and low at both ends. In the present utility model, the left and right sides only represent relative positions, and it is not necessarily the case that the head or tail 1 is on the left and the power unit 2 is on the right. Here, the integral bending means that the mat rack 3 is integrally bent in the left-right direction after being formed, rather than connecting two parts with a certain angle by welding or other means to form an angled mat rack 3. The specific inclination angle can be set according to the on-site needs. In the case of integral bending, there are no positions with drastic changes such as steps between the bottom surfaces of the mat rack 3, and the bottom of the mat rack 3 is smooth without protrusions, which can effectively reduce the resistance of coal pushing. After bending, the mat rack 3 forms an inclined surface that is high in the middle and low at both ends. The inclined surface can be a flat surface or a curved surface. The inclination angle of the inclined surface below the power unit 2 can effectively reduce the deviation and sinking of the entire mat rack 3 towards the right where the power unit 2 is located; the inclination angle of the inclined surface below the head or tail 1 can ensure that when the mat rack 3 is translated and pushed to the left, there is a certain preset angle for the mat rack 3 to dig into the bottom on the left side, avoiding the occurrence of drift phenomenon. In the present utility model, the head or tail 1 of the scraper conveyor is provided with a pre-set shoveling angle through the mat rack 3 to ensure the effect of digging into the bottom when the head or tail 1 is pushed, preventing drift from occurring.

[0020] The highest position of the mat rack 3 is at the boundary between the head or tail 1 and the power unit 2, as Figure 6 shown by the position indicated by A in. Here, the A position of the mat rack is used as the vertex of the bend, naturally forming the bending angle. On the left side of the boundary, a digging-in angle or shoveling angle of the head or tail 1 is naturally formed. When the hydraulic support pushes the head or tail 1 forward, there will be a tendency to dig into the bottom, completely preventing the occurrence of drift of the head or tail 1. The schematic diagram of the hydraulic support pushing the head or tail 1, the power unit, and the mat rack 3 thereunder to move is shown in Figure 1 as shown.

[0021] Furthermore, an arc surface is formed at the bending part of the mat rack 3, and the highest position of the arc surface is at the boundary between the head or tail 1 and the power unit 2; the mat rack 3 at both ends of the arc surface is tangent to the corresponding arc surface connection ends respectively. The bending part is an arc surface, and the angle change is smoothly transitioned, which can avoid stress concentration. A bending device with an arc surface at the bending part can be used to bend the mat rack 3. Of course, a structure and solution with an obtuse angle at the bending part are also within the protection scope of the present utility model.

[0022] Furthermore, a support part 4 is fixedly arranged between the power part 2 and the pad rack 3 below it. The support part 4 can be used to support the power part 2, transmit the gravity of the power part 2 to the pad rack 3, and eliminate the overturning moment caused by the gravity of the power part 2. The structure of the support part 4 can be an integral structure, a layer-by-layer structure, a screw structure with adjustable height, or other structures with adjustable height.

[0023] In the present utility model, the bending angle of the pad rack 3 is set as required, generally not less than 170 degrees. Here, the bending angle refers to the angle between the left end and the right end of the pad rack 3. If the edges at the left end and the right end of the pad rack 3 are planes, it is the angle between the two planes of the bending angle; if the left end and the right end of the pad rack 3 are curved surfaces, this bending angle is the angle between the tangents of the two curved surfaces.

[0024] The following describes the remaining structure of the pad rack 3: Lower connecting parts 31 are respectively arranged on the left and right sides of the left half of the pad rack 3, and upper connecting parts 11 are arranged at the corresponding positions of the machine head or the machine tail 1; A positioning hole 32 is arranged at the middle position of the left half of the pad rack 3, and a positioning pin shaft 12 is arranged at the position of the machine head or the machine tail 1 corresponding to the positioning hole 32; A pushing ear 5 for connecting a pushing oil cylinder is arranged at the right end of the right half of the pad rack 3. The pad rack 3 and the machine head or the machine tail 1 are positioned through the positioning hole 32 and the positioning pin shaft 12, and are fixed through the upper connecting part 11 and the lower connecting part 31. The upper connecting part 11 and the lower connecting part 31 can be fixed by common connection methods such as holes and bolts. The connection method between the left half of the pad rack 3 and the machine head or the machine tail 1 is the prior art and will not be described in detail. The pad rack 3 can include a large bottom plate in the lower part and a fixing plate welded on the large bottom plate of the right half. A rear plate is arranged at the rear of the right half part of the pad rack 3, and the rear plate can be placed at the rear of the pad rack 3, and can be fixedly connected or not fixedly connected. The structures of the pad rack 3 and the rear plate belong to the prior art and will not be described in detail. In the drawings, the machine head or the machine tail 1 is taken as an example to explain the structure of the present utility model.

[0025] During specific implementation: the upper part of the left half of the cushion frame 3 is connected to the machine head or the machine tail 1, the power unit 2 is arranged on the right half of the cushion frame 3, and a support part 4 is arranged between the cushion frame 3 and the power unit 2. A pushing ear 5 is arranged at the right end of the cushion frame 3. The cushion frame 3 is bent at a predetermined angle in the left-right direction, forming a shape with a high middle and low ends. Among them, the position of the cushion frame 3 corresponding to the boundary between the machine head or the machine tail 1 and the power unit 2 is the bending position and has the highest height. During pushing, the pushing oil cylinder pushes the entire machine head or the machine tail 1 to move leftward. Since the cushion frame 3 of the machine head or the machine tail 1 is provided with the power unit 2 and the support part 4, the gravity is transmitted to the large bottom plate of the cushion frame 3, eliminating the overturning moment. The cushion frame 3 is pre-set with a cutting angle to ensure the bottoming effect of the machine head or the machine tail 1 during pushing and prevent drifting.

[0026] 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 invention, according to the technical solution of the present invention and with equivalent substitution or change, and several changes and improvements made should also be regarded as the protection scope of the present invention.

Claims

1. An anti-slip pad, comprising a pad, wherein the left side of the pad is arranged below the head or tail of the scraper conveyor, and the right side of the pad is arranged below the power unit; characterized in that: The cushion frame is integrally bent in the left-right direction, and the bent cushion frame forms an inclined surface with a high middle and low ends.

2. The anti-slip pad according to claim 1, characterized in that: The highest position of the support frame is at the boundary between the nose or tail of the machine and the power unit.

3. The anti-slip pad according to claim 2, characterized in that: The bending part of the support frame forms an arc surface, and the highest position of the arc surface is at the boundary between the nose or tail of the machine and the power unit; the support frames at both ends of the arc surface are tangent to the corresponding arc surface connection ends respectively.

4. The anti-slip pad according to any one of claims 1 to 3, characterized in that: A supporting part is fixedly arranged between the power part and the cushion frame below the power part.

5. The anti-slip cushion according to any one of claims 1 to 3, characterized in that: The left side and right side of the left half of the support frame are respectively provided with upper connecting parts cooperating with the machine head or the machine tail, and the middle position of the left half plate of the support frame is provided with a positioning hole cooperating with the machine head or the machine tail.

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