A coal mine extraction conveyor

Abstract

The utility model provides a kind of conveying device of coal mining, including two door-shaped frames of parallel arrangement, the top of two door-shaped frames is fixedly connected by crossbeam, detection mechanism and conveyer belt down-pressing mechanism are sequentially arranged between two door-shaped frames along coal conveying direction;Detection mechanism has rotating shaft that is rotationally arranged above conveyer belt, the end of rotating shaft is fixedly provided with turntable, and the turntable is provided with a hole for avoiding, and proximity switch matched with the hole for avoiding is arranged beside the turntable, and friction plate is arranged on rotating shaft;When friction plate is close to conveyer belt to a certain distance, proximity switch corresponds with the hole for avoiding;In the utility model, when conveyer belt is in light load or empty load state, friction plate is close to conveyer belt to a certain distance, at this time, due to the arrangement of the hole for avoiding, turntable will not trigger proximity switch, controller judges that conveyer belt will be in light load or empty load state subsequently, then control conveyer belt down-pressing mechanism to press down and support conveyer belt, to avoid the phenomenon of conveyer belt.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine equipment technology, specifically relating to a conveying device for coal mining. Background Technology

[0002] In coal mining, conveyor belts are responsible for transporting coal from the mine shaft. However, when the conveyor belt reaches the concave section and is unloaded or lightly loaded, belt slippage often occurs, causing the conveyor belt to become suspended or even overturned, leading to deviation problems. Furthermore, material spillage is particularly pronounced when the head and tail of the conveyor belt pass through the concave section, resulting in material falling and requiring regular manual cleaning.

[0003] In the prior art, Chinese utility model patent document with authorization announcement number CN220641342U discloses a coal mine conveyor belt anti-drift device under no-load conditions. It takes pictures with a camera, and after the processor processes the image, it controls the extension and retraction of the telescopic device. When there is no load or little material, the pressure roller tightens the conveyor belt to prevent the conveyor belt from drifting. However, the internal environment of a coal mine is relatively complex, and dust can easily adhere to the camera, affecting the acquisition of images and the identification of no-load conditions, which in turn affects the subsequent control of the conveyor belt tightening.

[0004] Therefore, it is necessary to design a conveying device for coal mining that avoids the influence of dust on the identification of no-load conditions and improves the reliability of no-load anti-drift of the conveyor belt to solve the current technical problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a coal mining conveying device that avoids the influence of dust on the identification of no-load conditions and improves the reliability of no-load anti-drift of the conveyor belt.

[0006] The technical solution of this utility model is as follows: a conveying device for coal mining includes two parallel portal frames, the tops of which are fixedly connected by a crossbeam. A detection mechanism and a conveyor belt pressing mechanism are sequentially arranged between the two portal frames along the coal conveying direction. The detection mechanism has a rotating shaft rotatably mounted above the conveyor belt. A turntable is fixedly mounted at the end of the rotating shaft. An avoidance hole is provided on the turntable. A proximity switch matching the avoidance hole is mounted next to the turntable. A friction plate is provided on the rotating shaft. When the friction plate approaches the conveyor belt to a certain distance, the proximity switch corresponds to the avoidance hole.

[0007] Preferably, a side plate strip is fixedly installed on the gate frame, the end of the rotating shaft passes through the side plate strip and is rotatably connected to it, and the proximity switch is fixedly mounted next to the turntable by a switch bracket, the switch bracket being fixedly connected to one side of the side plate strip.

[0008] Preferably, a protective cover is fitted around the turntable and the proximity switch. The protective cover is a cylindrical cavity structure with one open end. A mounting edge is fixedly provided on the outer side of the open end of the protective cover. The mounting edge is detachably and fixedly assembled to the outer side of the side plate strip by bolts.

[0009] Preferably, the protective cover is a transparent protective cover.

[0010] Preferably, the conveyor belt pressing mechanism has a support rod and a cross brace fixedly arranged between the two portal frames. Two swing arms are symmetrically rotatably arranged on the support rod. A pressure roller is arranged on one end of the swing arm away from the support rod. A drive rod is arranged between the two swing arms. An electric push rod is hinged to the cross brace. The end of the electric push rod away from the cross brace is hinged to the drive rod.

[0011] Preferably, a connecting arm is slidably provided on one end of the swing arm away from the support rod, a length adjustment component is provided between the connecting arm and the swing arm, and the pressure roller is rotatably provided on one end of the connecting arm away from the swing arm.

[0012] Preferably, the length adjustment assembly has an upper support block fixedly disposed at the end of the swing arm, a lower support block corresponding to the upper support block fixedly disposed at the end of the connecting arm, an adjusting screw rotatably disposed on one side of the lower support block, the adjusting screw being threadedly connected to the upper support block, and a hexagonal block fixedly disposed at the end of the adjusting screw.

[0013] Preferably, a locking nut is threaded onto the adjusting screw.

[0014] Preferably, a sliding arm is fixedly provided on one end of the connecting arm near the swing arm, and the sliding arm is slidably disposed inside the swing arm.

[0015] Preferably, each of the portal frames is provided with a mounting clip at its bottom end.

[0016] The beneficial effects of this utility model are: (1) In this utility model, when the conveyor belt is in a light load or no load state, the friction plate and the conveyor belt are close to a certain distance, and the proximity switch corresponds to the clearance hole. At this time, due to the setting of the clearance hole, the turntable will not trigger the proximity switch again. When the controller receives that the proximity switch has not been triggered, it determines that the conveyor belt will be in a light load or no load state in the future, and then controls the conveyor belt pressing mechanism to press down and support the conveyor belt to avoid the conveyor belt from producing a belt drifting phenomenon. (2) The proximity switch is used in conjunction with the turntable. The proximity switch is a metal induction proximity switch and the turntable is made of metal material, which is not easily affected by dust on site, thus improving the reliability of the conveyor belt in no-load anti-drift. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0019] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0020] Figure 4 for Figure 2 A magnified view of a section at point B.

[0021] Figure 5 for Figure 1 A magnified view of a section at point C. Detailed Implementation

[0022] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are not intended to limit the present invention or its application or use in any way. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0023] like Figures 1 to 5As shown, this utility model provides a conveying device for coal mining, including two parallel portal frames 1. The tops of the two portal frames 1 are fixedly connected by a crossbeam 5. A detection mechanism 4 and a conveyor belt pressing mechanism 3 are sequentially arranged between the two portal frames 1 along the coal conveying direction. The detection mechanism 4 has a rotating shaft 41 rotatably mounted above the conveyor belt 2. A turntable 42 is fixedly mounted at the end of the rotating shaft 41. An avoidance hole 45 is provided on the turntable 42. A proximity switch 44 matching the avoidance hole 45 is mounted next to the turntable 42. A friction plate 43 is provided on the rotating shaft 41. When the conveyor belt 2 is in a lightly loaded or unloaded state, there is no coal or the coal thickness on the conveyor belt 2. At this time, the friction plate 43 approaches the conveyor belt 2 to a certain distance, and the proximity switch 44 corresponds to the avoidance hole 45. At this time, due to the setting of the clearance hole 45, the turntable 42 will no longer trigger the proximity switch 44. When the controller receives that the proximity switch 44 has not been triggered, it determines that the conveyor belt 2 will be in a light load or no load state. Then, it controls the conveyor belt pressing mechanism 3 to press down and support the conveyor belt 2 to avoid the conveyor belt from drifting. When the conveyor belt 2 is transporting under normal load, the coal mine at the top of the conveyor belt 2 continuously acts on the friction plate 43 to keep it at a certain angle. The friction plate 43 drives the turntable 42 to keep at a certain angle. At this time, the turntable 42 will trigger the proximity switch 44. The proximity switch 44 is a metal induction proximity switch and the turntable 42 is made of metal material, which is not easily affected by dust on site, thus improving the reliability of the conveyor belt in preventing drifting under no load.

[0024] When the friction plate 43 gets closer to the conveyor belt 2 to less than 3cm, the proximity switch 44 corresponds to the avoidance hole 45.

[0025] A side plate strip 6 is fixedly installed on the gate frame 1. The end of the rotating shaft 41 passes through the side plate strip 6 and is rotatably connected to it. The proximity switch 44 is fixedly mounted next to the turntable 42 through the switch bracket 43. The switch bracket 43 is fixedly connected to one side of the side plate strip 6.

[0026] A support plate 42 is fixedly installed on one side of the rotating shaft. The friction plate 43 is detachably and fixedly assembled on the support plate 42 by a bolt and nut mechanism. After the friction plate 43 is worn, it can be disassembled and replaced.

[0027] like Figure 5 As shown, a protective cover 7 is fitted on the outside of the turntable 42 and the proximity switch 44. The protective cover 7 is a cylindrical cavity structure with one open end. An installation edge 71 is fixedly provided on the outside of the open end of the protective cover 7. The installation edge 71 is detachably and fixedly assembled to the outside of the side plate strip 6 by bolts. The protective cover 7 plays a certain role in isolating and protecting the turntable 42 and the proximity switch 44 inside, further avoiding the influence of the external environment and improving reliability.

[0028] The protective cover 7 is a transparent cover, which makes it easy to observe the status of the internal proximity switch 44 and turntable 42.

[0029] like Figure 2 As shown, the conveyor belt pressing mechanism 3 has a support rod 31 and a cross brace 12 fixedly installed between two portal frames 1. Two swing arms 32 are symmetrically rotatably installed on the support rod 31. A pressure roller 34 is installed on the end of the swing arm 32 away from the support rod 31. A drive rod 39 is installed between the two swing arms 32. An electric push rod 38 is hinged to the cross brace 12. The end of the electric push rod 38 away from the cross brace 12 is hinged to the drive rod 39. By controlling the extension and retraction of the electric push rod 38 through the controller, the swing arm 32 can be driven to swing up and down, so that the pressure roller 34 presses down on the conveyor belt 2 and the pressure roller 34 is lifted off the conveyor belt 2.

[0030] A connecting arm 33 is slidably mounted on the end of the swing arm 32 away from the support rod 31. A length adjustment component is provided between the connecting arm 33 and the swing arm 32. The pressure roller 34 is rotatably mounted on the end of the connecting arm 33 away from the swing arm 32. After the portal frame 1 is installed on the frame of the conveyor belt, the total length between the swing arm 32 and the connecting arm 33 can be adjusted by the length adjustment component to adjust the position of the pressure roller 34, so that when the electric push rod 38 retracts into place, the pressure between the pressure roller 34 and the conveyor belt 2 is moderate.

[0031] like Figure 4 As shown, the length adjustment assembly has an upper support block 36 fixedly installed at the end of the swing arm 32, and a lower support block 35 corresponding to the upper support block 36 fixedly installed at the end of the connecting arm 33. An adjustment screw 37 is rotatably installed on one side of the lower support block 35. The adjustment screw 37 is threadedly connected to the upper support block 36, and a hexagonal block 371 is fixedly installed at the end of the adjustment screw 37. By clamping the hexagonal block 371 with a wrench, the adjustment screw 37 is rotated. During the rotation of the adjustment screw 37, the upper support block 36 is driven to move along its axial direction, thereby realizing the adjustment of the total length between the swing arm 32 and the connecting arm 33.

[0032] A locking nut 372 is threaded onto the adjusting screw 37. After the total length between the adjusting arm 32 and the connecting arm 33 is adjusted, the locking nut 372 is pressed against the upper support block 36 to lock the adjusting screw 37 and the upper support block 36, thus ensuring that the total length between the adjusting arm 32 and the connecting arm 33 is fixed.

[0033] A sliding arm 34 is fixedly provided on one end of the connecting arm 33 near the swing arm 32, and the sliding arm 34 is slidably disposed inside the swing arm 32; a slide rail matching the sliding arm 34 is provided inside one end of the swing arm 32.

[0034] Each portal frame 11 is equipped with a mounting clip 11 at its bottom end. The mounting clip 11 is fixed to the frame of the conveyor belt by bolts, thereby achieving the fixed installation of the portal frame 1.

[0035] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0036] The embodiments described above only illustrate some implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A conveying device for coal mining, characterized in that: The device includes two parallel portal frames, the tops of which are fixedly connected by a crossbeam. A detection mechanism and a conveyor belt pressing mechanism are sequentially arranged between the two portal frames along the coal conveying direction. The detection mechanism has a rotating shaft rotatably mounted above the conveyor belt. A turntable is fixedly mounted at the end of the rotating shaft. An avoidance hole is provided on the turntable. A proximity switch matching the avoidance hole is mounted next to the turntable. A friction plate is provided on the rotating shaft. When the friction plate approaches the conveyor belt to a certain distance, the proximity switch aligns with the avoidance hole.

2. The conveying device for coal mining according to claim 1, characterized in that: A side plate strip is fixedly installed on the gate frame. The end of the rotating shaft passes through the side plate strip and is rotatably connected to it. The proximity switch is fixedly mounted next to the turntable by a switch bracket, and the switch bracket is fixedly connected to one side of the side plate strip.

3. The conveying device for coal mining according to claim 2, characterized in that: The turntable and the proximity switch are fitted with a protective cover. The protective cover is a cylindrical cavity structure with one open end. A mounting edge is fixedly provided on the outer side of the open end of the protective cover. The mounting edge is detachably and fixedly assembled to the outer side of the side plate strip by bolts.

4. The conveying device for coal mining according to claim 3, characterized in that: The protective cover is a transparent cover.

5. The conveying device for coal mining according to claim 1, characterized in that: The conveyor belt pressing mechanism has a support rod and a cross brace fixedly arranged between the two portal frames. Two swing arms are symmetrically rotatably arranged on the support rod. A pressure roller is arranged on the end of the swing arm opposite to the support rod. A drive rod is arranged between the two swing arms. An electric push rod is hinged to the cross brace. The end of the electric push rod opposite to the cross brace is hinged to the drive rod.

6. The conveying device for coal mining according to claim 5, characterized in that: A connecting arm is slidably provided on one end of the swing arm away from the support rod, and a length adjustment component is provided between the connecting arm and the swing arm. The pressure roller is rotatably provided on one end of the connecting arm away from the swing arm.

7. The conveying device for coal mining according to claim 6, characterized in that: The length adjustment assembly has an upper support block fixedly installed at the end of the swing arm, and a lower support block corresponding to the upper support block is fixedly installed at the end of the connecting arm. An adjustment screw is rotatably installed on one side of the lower support block. The adjustment screw is threadedly connected to the upper support block, and a hexagonal block is fixedly installed at the end of the adjustment screw.

8. The conveying device for coal mining according to claim 7, characterized in that: The adjusting screw is threaded with a locking nut.

9. The conveying device for coal mining according to claim 6, characterized in that: A sliding arm is fixedly provided on one end of the connecting arm near the swing arm, and the sliding arm is slidably disposed inside the swing arm.

10. The conveying device for coal mining according to claim 1, characterized in that: The bottom of each portal frame is equipped with an installation clip.

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