Device for breaking and conveying longitudinal stripping plate and using method of device

Abstract

The invention discloses a device for breaking and conveying a longitudinal stripping plate and a using method of the device. The device for breaking and conveying the longitudinal stripping plate comprises a first conveying device, a second conveying device, a longitudinal edge breaking auxiliary device and a key falling plate crushing device. The longitudinal edge breaking auxiliary device is arranged on the first conveying device and is adjacent to the piano key falling plate crushing device; the first conveying device, the piano key falling plate crushing device and the second conveying device are sequentially arranged in the conveying direction of a glass plate, and the glass plate is broken off into a longitudinal stripping plate and a qualified plate through the longitudinal edge breaking auxiliary device. The longitudinal edge breaking auxiliary device is arranged on one side of the key falling plate crushing device, longitudinal stripping is broken off and separated, key rollers are arranged in a staggered and dense mode and conveyed to the crusher, the conveying distance of longitudinal stripping plates on a roller way is shortened, meanwhile, the length of a broken glass channel is shortened, the production cost is saved, and the production efficiency is improved. And the yield of glass plates is improved.

Description

A device for breaking and conveying longitudinal strips and its method of use. Technical Field

[0001] This invention relates to the field of float glass production technology, and in particular to a device and method for breaking and conveying longitudinal strips. Background Technology

[0002] Longitudinal strip cutting is a method of glass production optimization. It refers to the process of cutting defective parts of glass sheets with a longitudinal cutter and then breaking them off along the longitudinal cut with a longitudinal breaking device. The broken-off narrow strips of defective sheets are called longitudinal strips. The narrower the longitudinal strip, the wider the corresponding qualified sheets, and the higher the glass yield. After the qualified sheets and longitudinal strips are separated, the unqualified longitudinal strips are conveyed to the piano key drop plate for crushing.

[0003] However, the ideal implementation of this process heavily relies on sufficient plant space and equipment configuration. Many existing production lines, especially retrofit projects, often face the dilemma of insufficient conveyor roller length, while the longitudinal breaking and separating devices require a large amount of space. If the entire line is forcibly extended to meet the process requirements, not only will the equipment investment be huge, but it will also lead to a series of chain modifications to facilities such as the crushing chamber and underground glass crushing channel, causing civil engineering and equipment costs to increase exponentially. Summary of the Invention

[0004] In view of this, to solve the above problems, the purpose of this invention is to provide a device for breaking and conveying a longitudinally shaped sheet, comprising: a first conveying device, a second conveying device, a longitudinal edge-breaking auxiliary device, and a key-drop-and-break device; the longitudinal edge-breaking auxiliary device is disposed on the first conveying device adjacent to the key-drop-and-break device; the first conveying device, the key-drop-and-break device, and the second conveying device are arranged sequentially along the conveying direction of the glass sheet, and the glass sheet is broken into a longitudinally shaped sheet and a qualified sheet by the longitudinal edge-breaking auxiliary device; the longitudinal edge-breaking auxiliary device comprises: two guide rails, two cylinders, two linear drive devices, an upper pressure roller, and a lower top roller; the two guide rails are arranged vertically parallel; the two cylinders are indirectly mounted on the two guide rails respectively, and one end of the upper pressure roller and one end of the lower top roller are respectively connected to the two cylinders; the output direction of the cylinders is perpendicular to the extension direction of the guide rails; the two linear drive devices are respectively connected to the two cylinders, and the two linear drive devices are used to drive the cylinders, the upper pressure roller, and the lower top roller to move along the guide rails.

[0005] In another preferred embodiment, the extension direction of the guide rail is perpendicular to the forward direction of the longitudinal drawing plate; the output direction of the cylinder is perpendicular to the forward direction of the longitudinal drawing plate.

[0006] In another preferred embodiment, the linear drive device includes: a drive shaft, a nut block, a bracket, a slider, and a drive mechanism; the slider is fixedly connected to the bracket, the cylinder is fixedly mounted on the bracket, the slider is slidably connected to the guide rail, the nut block is fixedly mounted on the bracket, the drive shaft includes a lead screw portion and a guide rod portion connected to each other, the nut block is drively connected to the lead screw portion of the drive shaft, the guide rod portion of the drive shaft is connected to the drive mechanism, and the drive mechanism is used to drive the rotation of the drive shaft.

[0007] In another preferred embodiment, both the upper pressure roller and the lower top roller include: a frame, a guide rod, and a wheel body. The wheel body is rotatably mounted on one end of the frame, and the other end of the frame is connected to the output end of the cylinder and the support end. One end of the guide rod is fixedly connected to the frame, and the other end of the guide rod is slidably engaged with the cylinder.

[0008] In another preferred embodiment, the first conveying device is a roller conveyor, with the upper pressure roller and the lower top roller respectively disposed on the upper and lower sides of the roller conveyor; the roller conveyor includes a plurality of rollers arranged sequentially along the conveying direction of the glass plate, with the upper pressure roller and the lower top roller disposed between two adjacent rollers.

[0009] In another preferred embodiment, the lower top wheel is a rotating body, and the generatrix of the rotating body includes a first line portion and a second line portion connected to each other, with an included angle between the first line portion and the second line portion.

[0010] In another preferred embodiment, the piano key breaking device includes: a fixed frame, a connecting frame, a plurality of piano keys and a driving cylinder. The plurality of piano keys are arranged in parallel in sequence, with a gap between each pair of adjacent piano keys. At least one end of the piano key is hinged to the fixed frame, and the other end of the at least one piano key is connected to the upper end of the driving cylinder. The lower end of the driving cylinder is connected to the connecting frame. Each piano key has a plurality of first rollers along its length.

[0011] In another preferred embodiment, each first roller on the piano key is connected to a connecting shaft, and a second roller is connected to each end of the connecting shaft.

[0012] In another preferred embodiment, the two second rollers on one side of two adjacent first rollers on the piano key are staggered.

[0013] In another preferred embodiment, it further includes: a waste conveying mechanism, a crushing mechanism, and a receiving hopper; the waste conveying mechanism is inclined and has a first end and a second end, the horizontal height of the first end being greater than the horizontal height of the second end; the first end is located near the connecting frame; the second end is located near the input end of the crushing mechanism; the receiving hopper is located at the discharge end of the crushing mechanism.

[0014] This invention also proposes a method for using a device for longitudinally breaking and conveying a glass plate, comprising the following steps: Step 1: Placing a glass plate with longitudinal cutting marks on a first conveying device, the leading edge of the glass plate is transported by the first conveying device to a position close to the longitudinal edge-breaking auxiliary device; Step 2: Activating the linear drive device on one side of the lower top roller, driving the lower top roller to move linearly along the guide rail until the lower top roller is aligned with the longitudinal cutting marks of the glass plate; Step 3: Activating the linear drive device on one side of the upper pressure roller, driving the upper pressure roller to move linearly along the guide rail. Step 1: The upper pressure roller is moved radially, leaving a certain distance between itself and the longitudinal cut of the glass plate. Step 2: The first conveying device moves the glass plate above the lower top roller, operates the lower cylinder of the lower top roller, drives the lower top roller to move upward, and lifts the glass plate. Step 3: The upper cylinder of the upper pressure roller is operated, drives the upper pressure roller to move downward, so that the qualified plate and the longitudinal strip plate are separated along the longitudinal cut. Step 4: The separated longitudinal strip plate is conveyed to the piano key drop plate crushing device through the first conveying device and conveyed to the crusher through the piano key rollers arranged in an interlaced and dense manner.

[0015] The present invention, by adopting the above-mentioned technical solution, has the following positive effects compared with the prior art: The present invention provides a device and method for breaking and conveying longitudinal strips in float glass production, which can achieve efficient breaking and conveying of longitudinal strips with a small production line space. Specifically, a longitudinal edge-breaking auxiliary device is set on one side of the piano key drop plate crushing device to break and separate the longitudinal strips, and convey them to the crusher through a staggered and dense arrangement of piano key rollers, which shortens the conveying distance of the longitudinal strips on the roller conveyor, and at the same time shortens the length of the broken glass channel, saves production costs, and improves the yield of glass sheets. Attached Figure Description

[0016] Figure 1 is a front view of a device for splitting and conveying longitudinal strips according to the present invention; Figure 2 is a top view of a device for splitting and conveying longitudinal strips according to the present invention; Figure 3 is a front view of a longitudinal edge-breaking auxiliary device of a device for splitting and conveying longitudinal strips according to the present invention; Figure 4 is a left view of a longitudinal edge-breaking auxiliary device of a device for splitting and conveying longitudinal strips according to the present invention; Figure 5 is a view of the longitudinal edge-breaking auxiliary device of a device for splitting and conveying longitudinal strips according to the present invention from direction A.

[0017] In the attached diagram: 10. Longitudinal edge-breaking auxiliary device; 11. Drive shaft; 12. Guide rail; 13. Cylinder; 14. Guide rod; 15. Lower top wheel; 16. Upper pressure wheel; 17. Bracket; 18. Nut block; 19. Slider; 20. Piano key drop plate crushing device; 21. Piano key; 22. First roller; 23. Connecting shaft; 24. Fixed frame; 25. Connecting frame; 26. Second roller; 30. Longitudinal strip plate; 40. Qualified plate; 51. First conveying device; 52. Second conveying device; 53. Drive cylinder; 54. Waste conveying mechanism; 55. Crushing mechanism; 56. Receiving hopper; 61. Frame. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "lateral", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] It should be noted that the terms "horizontal" and "vertical" in this invention are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0021] As shown in Figures 1-5, a preferred embodiment of a device for breaking and conveying longitudinal strips is illustrated, comprising: a first conveying device 51, a second conveying device 52, a longitudinal edge-breaking auxiliary device 10, and a key-drop crushing device 20; the longitudinal edge-breaking auxiliary device 10 is disposed adjacent to the key-drop crushing device 20 on the first conveying device 51; the first conveying device 51, the key-drop crushing device 20, and the second conveying device 52 are arranged sequentially along the conveying direction of the glass plate, and the glass plate is broken apart into longitudinal strips 30 and qualified plates 40 by the longitudinal edge-breaking auxiliary device. By arranging the longitudinal edge-breaking auxiliary device adjacent to the key-drop crushing device 20, the longitudinal strips 30 are directly conveyed to the key-drop crushing device 20 after being broken apart, reducing the distance from the longitudinal strips 30 to the crusher.

[0022] Preferably, the first conveying device 51 is arranged horizontally, and the longitudinal edge-breaking auxiliary device 10 is arranged vertically to the first conveying device 51, that is, the projection of the longitudinal edge-breaking auxiliary device 10 in the vertical direction preferably overlaps on the first conveying device 51.

[0023] Furthermore, as a preferred embodiment, the longitudinal flanging auxiliary device includes: two guide rails 12, two cylinders 13, two linear drive devices, an upper pressure roller 16, and a lower top roller 15; the two guide rails 12 are arranged vertically parallel; one end of the upper pressure roller 16 and one end of the lower top roller 15 are respectively connected to the two cylinders 13; the output direction of the cylinders 13 is perpendicular to the extension direction of the guide rails 12; the two linear drive devices are respectively connected to the two cylinders 13, and the two linear drive devices are used to drive the cylinders 13, the upper pressure roller 16, and the lower top roller 15 to move along the guide rails 12.

[0024] In actual use, the initial position of the upper pressure roller 16 is located 20-30mm above the upper surface of the roller, and the initial position of the lower top roller 15 is located 10-15mm below the lower surface of the roller. Before starting the cylinder 13, observing along the glass's forward direction, the upper pressure roller 16 is positioned outside the glass plate's cut, and the lower top roller 15 is located at the center line of the glass plate's cut. Through the working principle of downward pressing and upward pressure, the glass plate is broken and separated. The specific positions of the upper pressure roller 16 and the lower top roller 15 can be adjusted according to actual production needs, enabling the separation of the longitudinal strip plate 30 at any position on the glass plate, thus providing a certain degree of flexibility.

[0025] Furthermore, in a preferred embodiment, the extension direction of the guide rail 12 is perpendicular to the forward direction of the longitudinal drawer plate 30; the output direction of the cylinder 13 is perpendicular to the forward direction of the longitudinal drawer plate 30.

[0026] Furthermore, as a preferred embodiment, the linear drive device includes: a drive shaft 11, a nut block 18, a bracket 17, a slider 19, and a drive mechanism; the slider 19 is fixedly connected to the bracket 17, the cylinder 13 is fixedly mounted on the bracket 17, the slider 19 is slidably connected to the guide rail 12, the nut block 18 is fixedly mounted on the bracket 17, the drive shaft 11 includes a lead screw portion and a guide rod portion connected to each other, the nut block 18 is drively connected to the lead screw portion of the drive shaft 11, the guide rod portion of the drive shaft 11 is connected to the drive mechanism, and the drive mechanism is used to drive the rotation of the drive shaft 11.

[0027] Furthermore, in a preferred embodiment, both the upper pressure roller 16 and the lower top roller 15 include: a frame 61, a guide rod 14, and a wheel. The wheel is rotatably mounted on one end of the frame 61, and the other end of the frame is connected to the output end of the cylinder 13. One end of the guide rod 14 is fixedly connected to the frame 61, and the other end of the guide rod 14 is slidably engaged with the cylinder 13. Specifically, a fixing member is fixedly installed on the cylinder 13, and the fixing member has a through groove that matches the guide rod 14. The guide rod 14 is slidably connected to the through groove. When the cylinder 13 is started, it drives the frame 61, the guide rod, and the wheel to move upward together, while the guide rod 14 slides in the through groove.

[0028] Furthermore, as a preferred embodiment, the first conveying device 51 is a roller conveyor, with the upper pressure roller 16 and the lower top roller 15 respectively disposed on the upper and lower sides of the roller conveyor; the roller conveyor includes a plurality of rollers arranged sequentially along the conveying direction of the glass plate, with the upper pressure roller 16 and the lower top roller 15 disposed between two adjacent rollers.

[0029] Furthermore, as a preferred embodiment, the lower top wheel 15 is a rotating body. The generatrix of the rotating body includes a first line portion and a second line portion that are connected to each other. An included angle is formed between the first line portion and the second line portion. This included angle makes the outer edge of the lower top wheel 15 convex, thereby facilitating the separation of the longitudinal strip plate 30 and the qualified plate 40.

[0030] Furthermore, as a preferred embodiment, the piano key breaking device includes: a fixed frame 24, a connecting frame 25, a plurality of piano keys 21 and a driving cylinder 53. The plurality of piano keys 21 are arranged in parallel in sequence, with a gap between each pair of adjacent piano keys 21. At least one end of the piano key 21 is hinged to the fixed frame 24, and the other end of the at least one piano key 21 is connected to the upper end of the driving cylinder 53. The lower end of the driving cylinder 53 is connected to the connecting frame 25. Each piano key 21 has a plurality of first rollers 22 along its length.

[0031] Furthermore, in a preferred embodiment, each first roller 22 on the piano key 21 is connected to a connecting shaft 23, and a second roller 26 is connected to each end of the connecting shaft 23. The second roller 26 is used to convey the narrow longitudinal drawer plate 30 and prevent it from falling during conveying. Furthermore, in a preferred embodiment, the two second rollers 26 on one side of two adjacent first rollers 22 on the piano key 21 are staggered. Preferably, two types of connecting shafts 23 of different lengths are included, and the two types of connecting shafts 23 of different lengths are staggered, so that the two second rollers 26 on one side of two adjacent first rollers 22 are staggered. Furthermore, the number and position of the second rollers 26 can be adjusted according to the width of the longitudinal drawer plate 30, providing a certain degree of flexibility.

[0032] Furthermore, as a preferred embodiment, it also includes: a waste conveying mechanism 54, a crushing mechanism 55, and a receiving hopper 56; the waste conveying mechanism 54 is inclined and has a first end and a second end, the horizontal height of the first end being greater than the horizontal height of the second end; the first end is located near the connecting frame 25; the second end is located near the input end of the crushing mechanism 55; the receiving hopper 56 is located at the discharge end of the crushing mechanism; preferably, the upper end of the receiving hopper 56 is provided with a feed inlet, and the piano key 21, the waste conveying mechanism 54, and the crushing mechanism 55 are all located at the upper end of the feed inlet, which can receive the crushed longitudinal strip plate 30, and at the same time prevent the longitudinal strip plate 30 and the qualified plate 40 transported on the piano key 21, the waste conveying mechanism 54, and the crushing mechanism 55 from falling directly to the ground.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0034] Based on the above, this invention also proposes a method for using a longitudinal strip-breaking device, comprising the following steps: Step 1: Place the glass plate with longitudinal cutting marks on the first conveying device 51, and transport the leading edge of the glass plate to a position close to the longitudinal edge-breaking auxiliary device 10 via the first conveying device 51; Step 2: Activate the linear drive device on one side of the lower top roller 15, driving the lower top roller 15 to move in a straight line along the guide rail 12 until the lower top roller 15 is aligned with the longitudinal cutting marks of the glass plate; Step 3: Activate the linear drive device on one side of the upper pressure roller 16, driving the upper pressure roller 16 to move in a straight line along the guide rail 12, so that the upper pressure roller 16 maintains a certain distance radially from the longitudinal cutting marks of the glass plate; Step 4: The first conveying device 51 moves the glass plate above the lower top roller 15, and operates the cylinder at the lower part of the lower top roller 15 to drive the lower top roller 15. Step 5: The cylinder at the top of the upper pressure roller 16 is activated, driving the upper pressure roller 16 to move downward, so that the qualified plate 40 and the longitudinal strip plate 30 are separated along the longitudinal cut position, and the qualified plate 40 and the longitudinal strip plate 30 are separated by the convex surface of the lower top roller 15; Step 6: The separated longitudinal strip plate 30 is conveyed to the piano key 21 connected to the second roller 26 through the first conveying device 51, and at the same time the qualified plate 40 is conveyed to the other piano keys 21 through the first conveying device. The drive cylinder 53 is activated, so that the piano key 21 connected to the second roller 26 is tilted towards one end of the waste conveying mechanism 54, so that the longitudinal strip plate 30 is conveyed to the waste conveying mechanism 54; This can realize the longitudinal strip plate 30 at any position of the glass plate, while shortening the width of the longitudinal strip plate 30 and increasing the glass yield.

[0035] Step 7: The qualified board 40 is conveyed to the next process through other piano keys 21, and the longitudinal strip board 30 is conveyed to the crushing mechanism 55 through the waste conveying mechanism 54 and then crushed and dropped into the receiving hopper 56.

[0036] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for breaking open and conveying longitudinally drawn strips, characterized in that, include: First conveying device, second conveying device, longitudinal edge-breaking auxiliary device and piano key drop plate crushing device; The longitudinal edge-breaking auxiliary device is located on the first conveying device adjacent to the key-drop breaking device; the first conveying device, the key-drop breaking device, and the second conveying device are arranged sequentially along the conveying direction of the glass plate, and the glass plate is broken into longitudinal strips and qualified plates by the longitudinal edge-breaking auxiliary device; the longitudinal edge-breaking auxiliary device includes: two guide rails, two cylinders, two linear drive devices, an upper pressure roller, and a lower top roller; the two guide rails are arranged parallel to each other vertically; the two cylinders are indirectly mounted on the two guide rails respectively, and one end of the upper pressure roller and one end of the lower top roller are respectively connected to the two cylinders; the output direction of the cylinders is perpendicular to the extension direction of the guide rails; the two linear drive devices are respectively connected to the two cylinders, and the two linear drive devices are used to drive the cylinders, the upper pressure roller, and the lower top roller to move along the guide rails.

2. The device for breaking and conveying longitudinal strips according to claim 1, characterized in that, The extension direction of the guide rail is perpendicular to the forward direction of the longitudinal drawing plate; the output direction of the cylinder is perpendicular to the forward direction of the longitudinal drawing plate.

3. The device for breaking and conveying longitudinal strips according to claim 1, characterized in that, The linear drive device includes: a drive shaft, a nut block, a bracket, a slider, and a drive mechanism; the slider is fixedly connected to the bracket, the cylinder is fixedly mounted on the bracket, the slider is slidably connected to the guide rail, the nut block is fixedly mounted on the bracket, the drive shaft includes a lead screw portion and a guide rod portion connected to each other, the nut block is drively connected to the lead screw portion of the drive shaft, the guide rod portion of the drive shaft is connected to the drive mechanism, and the drive mechanism is used to drive the rotation of the drive shaft.

4. The device for breaking and conveying longitudinal strips according to claim 1, characterized in that, Both the upper pressure roller and the lower top roller include: a frame, a guide rod, and a wheel body. The wheel body is rotatably mounted on one end of the frame, and the other end of the frame is connected to the output end of the cylinder and the support end. One end of the guide rod is fixedly connected to the frame, and the other end of the guide rod is slidably engaged with the cylinder.

5. The device for breaking and conveying longitudinal strips according to claim 1, characterized in that, The first conveying device is a roller conveyor, with the upper pressure roller and the lower top roller respectively disposed on the upper and lower sides of the roller conveyor; the roller conveyor includes a plurality of rollers arranged sequentially along the conveying direction of the glass plate, with the upper pressure roller and the lower top roller disposed between two adjacent rollers.

6. The apparatus for breaking and conveying longitudinal strips according to claim 1, characterized in that, The lower top wheel is a rotating body, and the generatrix of the rotating body includes a first line portion and a second line portion that are connected to each other, with an included angle between the first line portion and the second line portion.

7. The apparatus for breaking and conveying longitudinal strips according to claim 1, characterized in that, The piano key breaking device includes: a fixed frame, a connecting frame, several piano keys and a driving cylinder. The several piano keys are arranged in parallel in sequence, with a gap between each pair of adjacent piano keys. At least one end of the piano key is hinged to the fixed frame, and the other end of the at least one piano key is connected to the upper end of the driving cylinder. The lower end of the driving cylinder is connected to the connecting frame. Each piano key has several first rollers along its length.

8. The apparatus for breaking and conveying longitudinal strips according to claim 7, characterized in that, Each first roller on the piano key is connected to a connecting shaft, and a second roller is connected to each end of the connecting shaft; the two second rollers on one side of two adjacent first rollers on the piano key are staggered.

9. The apparatus for breaking and conveying longitudinal strips according to claim 7, characterized in that, Also includes: The waste conveying mechanism, the crushing mechanism, and the receiving hopper are provided. The waste conveying mechanism is inclined and has a first end and a second end. The horizontal height of the first end is greater than that of the second end. The first end is located near the connecting frame. The second end is located near the input end of the crushing mechanism. The receiving hopper is located at the discharge end of the crushing mechanism.

10. A method of using the apparatus for breaking and conveying longitudinal strips as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Step Step 1: Place the glass plate with longitudinal cutting marks on the first conveying device. The leading edge of the glass plate is transported by the first conveying device to a position close to the longitudinal edge-trimming auxiliary device. The longitudinal cutting marks separate the glass plate into qualified plates and longitudinal strip plates. Step 2: Activate the linear drive device on one side of the lower top roller, driving the lower top roller to move in a straight line along the guide rail until the lower top roller is aligned with the longitudinal cutting marks of the glass plate. Step 3: Activate the linear drive device on one side of the upper pressure roller, driving the upper pressure roller to move in a straight line along the guide rail, so that... The upper pressure roller maintains a certain distance radially from the longitudinal cutting mark of the glass plate; Step 4: The first conveying device moves the glass plate above the lower top roller, operates the cylinder at the bottom of the lower top roller, drives the lower top roller to move upward, and lifts the glass plate; Step 5: Operates the cylinder at the top of the upper pressure roller, drives the upper pressure roller to move downward, so that the qualified plate and the longitudinal strip plate are separated along the longitudinal cutting mark; Step 6: The separated longitudinal strip plate is conveyed to the piano key drop plate crushing device through the first conveying device for crushing.

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