Pressing device for pressing down and conveying flexible parts and calcium carbide conveying line

Abstract

The present invention relates to a pressing device for pressing down a conveying flexible member and a calcium carbide conveying line. The pressing device comprises a bracket, a pressing rod is hingedly mounted on the bracket along a horizontal axis, a pressing structure is arranged at the lower end of the pressing rod for being arranged above the conveying flexible member to press down the conveying flexible member, the pressing rod has a pressing position in its swing stroke for lowering so that the pressing structure can press down the conveying flexible member and an evasion position for raising so that the pressing structure can avoid the corresponding calcium carbide trolley, and the pressing device also comprises a driving structure for driving the pressing rod to swing back and forth between the pressing position and the evasion position. The pressing structure at the end of the pressing rod can be lowered to press down the conveying flexible member, and can be raised to avoid the calcium carbide trolley when the calcium carbide trolley arrives, thereby avoiding the problem of fatigue aggravation caused by the conveying flexible member rising at the bottom of the slope, extending the service life of the conveying flexible member, and at the same time avoiding the conveying flexible member from exerting a force on the calcium carbide trolley to cause the calcium carbide trolley and the conveying track to become stuck.

Description

Technical Field

[0001] The invention relates to a pressing device for pressing down and conveying a flexible member and a calcium carbide conveying line. Background Art

[0002] Calcium carbide is made by the reaction of calcium oxide and coke in a calcium carbide furnace at a high temperature of 1800-2200 degrees Celsius by means of arc heat and resistance heat. In the traditional calcium carbide industry, the process of calcium carbide being discharged from the furnace is divided into two parts. The first part is that the operator controls the winch and the calcium carbide trolley to make the molten calcium carbide flow from the calcium carbide furnace into each calcium carbide pot, and then transports the calcium carbide to the cooling workshop for cooling, and finally uses a crane and clamps to lift the cooled calcium carbide blocks out of the calcium carbide pot; the second part is that during the process of calcium carbide being discharged from the furnace, the workers perform plugging, burning through, slag removal and slag pulling on the working platform in front of the furnace. This method of discharging from the furnace is relatively rough and the workers have a large workload.

[0003] A Chinese invention patent with authorization announcement number CN104986161B discloses a calcium carbide transport train, which includes a closed-loop track on which a calcium carbide trolley for transporting calcium carbide is moved. The closed-loop track is also provided with a drive motor for driving the calcium carbide trolley to move on the closed-loop track and a closed-loop chain connected between the calcium carbide trolley and the drive motor for transmission, wherein the closed-loop chain is located below the calcium carbide trolley.

[0004] When the above-mentioned calcium carbide conveying train is in use, the closed-loop track is arranged in a ring around the calcium carbide furnace. Normally, the outlet of the calcium carbide furnace and the unloading port of the calcium carbide trolley are not in the same horizontal plane. Therefore, the closed-loop track needs to have an inclined slope section and a horizontal section that is transitionally connected to the bottom of the inclined slope section. When the closed-loop chain is at the bottom of the corresponding inclined slope section, due to the traction of the drive motor and the gravity of the calcium carbide trolley, the closed-loop chain will rise. When the calcium carbide trolley passes the bottom of the inclined slope section, the rising closed-loop chain will be pressed down, which will cause the closed-loop chain to frequently change in tightness, which will further increase the fatigue of the closed-loop chain. Moreover, if the tension of the closed-loop chain is very high when rising, it will easily cause the calcium carbide trolley to be deformed due to force and cause obvious jamming with the conveying track, causing additional wear or even stagnation of the calcium carbide trolley. Summary of the invention

[0005] The object of the present invention is to provide a pressing device for pressing down a conveying flexible member, which is arranged at the bottom of the inclined slope section of the corresponding calcium carbide conveying track, so as to avoid the technical problem of the conveying chain rising up; the present invention also provides a calcium carbide conveying line using the above-mentioned pressing device, so as to avoid the technical problem of the conveying chain rising up and causing the calcium carbide trolley and the conveying track to get stuck.

[0006] In order to solve the above technical problems, the technical solution of the pressing device for pressing down the conveying flexible member of the present invention is:

[0007] A pressing device for pressing down a conveying flexible member includes a bracket, on which a pressing rod is hingedly assembled along a horizontal axis, and the lower end of the pressing rod is provided with a pressing structure for being arranged above the conveying flexible member to press down the conveying flexible member to prevent the conveying flexible member from rising at the bottom of the slope along the extension direction of the conveying flexible member. The pressing rod has a pressing position in its swing stroke for lowering the pressing structure to press down the conveying flexible member and an avoidance position for rising to allow the pressing structure to avoid the corresponding calcium carbide trolley. The pressing device also includes a driving structure for driving the pressing rod to swing back and forth between the pressing position and the avoidance position.

[0008] The beneficial effect of this technical solution is that the down-pressing rod can rotate along the horizontal axis on the bracket. During the swinging process of the down-pressing rod, the down-pressing structure at the end of the down-pressing rod can be lowered to press down the conveying flexible part. At the same time, it can rise when the calcium carbide trolley arrives to avoid the calcium carbide trolley, thereby avoiding the problem of increased fatigue of the conveying flexible part caused by rising at the bottom of the slope, extending the service life of the conveying flexible part, and at the same time avoiding the conveying flexible part from exerting force on the calcium carbide trolley to cause the calcium carbide trolley and the conveying track to get stuck, thereby improving the transportation safety of the calcium carbide conveyor line.

[0009] The pressing structure is a pressing wheel rotatably mounted on the lower end of the pressing rod. The pressing wheel is rotatably mounted on the end of the pressing rod, which can reduce the friction between the pressing wheel and the conveying flexible member and prolong the service life of the conveying flexible member.

[0010] The outer circumference of the pressing wheel is provided with an annular groove for accommodating the conveying flexible member. The annular groove can limit the conveying flexible member laterally to prevent the conveying flexible member from detaching from the pressing wheel from the side.

[0011] The bracket is provided with a transverse support shaft extending in the horizontal direction, the transverse support shaft is located above the conveying flexible member, the pressing rod and the transverse support shaft are in a T-shaped structure, and the pressing rod and the conveying flexible member are located in the same vertical plane. The pressing rod and the conveying flexible member are located in the same vertical plane, and the force applied by the pressing rod to the conveying flexible member is in the vertical plane, so as to prevent the conveying flexible member from being separated from the pressing structure due to the lateral force.

[0012] The bracket is provided with a transverse support shaft extending in the horizontal direction, and two downward pressing rods are arranged on the transverse support shaft at intervals in the horizontal direction. The downward pressing structures on the two downward pressing rods are staggered in the swing circumferential direction of the downward pressing rods so that when one downward pressing structure rises, the other downward pressing structure presses down. There are two downward pressing rods and when one rises, the other presses down, so that the two conveying flexible members can be pressed down respectively to prevent the conveying flexible members from rising.

[0013] Each of the down-pressing rods is arranged in a T-shape with the transverse support shaft. The T-shape arrangement is simple to assemble and convenient to use.

[0014] The technical solution of the calcium carbide conveyor line of the present invention is:

[0015] The calcium carbide conveyor line comprises a conveying track, on which a calcium carbide conveyor train is movably mounted, the calcium carbide conveyor train comprises a plurality of calcium carbide trolleys, the calcium carbide conveyor line also comprises a conveying flexible member extending along the conveying track and fixedly connected to the corresponding calcium carbide trolleys, the conveying track comprises an inclined conveying section and a lower horizontal conveying section transitionally connected to the bottom of the slope of the inclined conveying section, the calcium carbide trolley is located above the conveying flexible member when moving to the inclined conveying section and the lower horizontal conveying section, a pressing device for pressing down the conveying flexible member is provided at the bottom of the slope of the corresponding inclined conveying section, and the lower horizontal conveying section is provided with a pressing device for pressing down the conveying flexible member. The pressing device includes a bracket, on which a pressing rod is hingedly assembled along a horizontal axis. The lower end of the pressing rod is provided with a pressing structure arranged above the conveying flexible member to press down the conveying flexible member to prevent the conveying flexible member from rising along the extension direction of the conveying flexible member at the bottom of the slope. The pressing rod has a pressing position in its swing stroke for lowering the pressing structure to press down the conveying flexible member and an avoidance position for rising to avoid the pressing structure to avoid the corresponding calcium carbide trolley. The pressing device also includes a driving structure for driving the pressing rod to swing back and forth between the pressing position and the avoidance position.

[0016] The beneficial effect of this technical solution is that the down-pressing rod can rotate along the horizontal axis on the bracket. During the swinging process of the down-pressing rod, the down-pressing structure at the end of the down-pressing rod can be lowered to press down the conveying flexible part. At the same time, it can rise when the calcium carbide trolley arrives to avoid the calcium carbide trolley, thereby avoiding the problem of increased fatigue of the conveying flexible part caused by rising at the bottom of the slope, extending the service life of the conveying flexible part, and at the same time avoiding the conveying flexible part from exerting force on the calcium carbide trolley to cause the calcium carbide trolley and the conveying track to get stuck, thereby improving the transportation safety of the calcium carbide conveyor line.

[0017] The pressing structure is a pressing wheel rotatably mounted on the lower end of the pressing rod. The pressing wheel is rotatably mounted on the end of the pressing rod, which can reduce the friction between the pressing wheel and the conveying flexible member and prolong the service life of the conveying flexible member.

[0018] The outer circumference of the pressing wheel is provided with an annular groove for accommodating the conveying flexible member. The annular groove can limit the conveying flexible member laterally to prevent the conveying flexible member from detaching from the pressing wheel from the side.

[0019] The bracket is provided with a transverse support shaft extending in the horizontal direction, the transverse support shaft is located above the conveying flexible member, the pressing rod and the transverse support shaft are in a T-shaped structure, and the pressing rod and the conveying flexible member are located in the same vertical plane. The pressing rod and the conveying flexible member are located in the same vertical plane, and the force applied by the pressing rod to the conveying flexible member is in the vertical plane, so as to prevent the conveying flexible member from being separated from the pressing structure due to the lateral force.

[0020] There are two inclined conveying sections arranged in parallel, two lower horizontal conveying sections arranged and corresponding to the two inclined conveying sections, a horizontal support shaft extending in the horizontal direction is provided on the bracket, two downward pressing rods are arranged in the horizontal direction on the horizontal support shaft at intervals corresponding to the two inclined conveying sections, and the downward pressing structures on the two downward pressing rods are staggered in the swing circumference of the downward pressing rods so that when one downward pressing structure rises, the other downward pressing structure presses down. There are two downward pressing rods and when one rises, the other presses down, so that the two conveying flexible members can be pressed down respectively to prevent the conveying flexible members from rising.

[0021] Each of the down-pressing rods is arranged in a T-shape with the transverse support shaft. The T-shape arrangement is simple to assemble and convenient to use.

[0022] The calcium carbide conveyor line also includes a control system for controlling the action of the driving structure, the control system includes a position sensor for detecting the position of the calcium carbide trolley and a controller connected to the driving structure, and the controller is connected to the position sensor signal. The controller controls the driving structure to work automatically through the position sensor, and the calcium carbide conveyor line can be operated automatically and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of Embodiment 1 of the calcium carbide conveying line of the present invention;

[0024] Figure 2 for Figure 1 A top view of the calcium carbide conveyor line;

[0025] Figure 3 for Figure 1 A partial enlarged schematic diagram of the bottom of the slope of the inclined conveying section of the calcium carbide conveying line and the downward pressing device;

[0026] Figure 4 for Figure 3 A schematic diagram of the structure of the downward pressure device to avoid the calcium carbide trolley;

[0027] Figure 5 for Figure 4 A top view of

[0028] Figure 6 It is a three-dimensional diagram of the bottom of the slope and the downward pressing device of the inclined conveying section of Example 1 of the calcium carbide conveying line of the present invention.

[0029] The marks in the figure are: 1. Conveying track; 11. Unloading point; 12. Inclined conveying section; 13. Lower horizontal conveying section; 2. Calcium carbide trolley; 3. Conveying chain; 4. Calcium carbide furnace; 41. Discharge port; 5. Motor; 6. Bracket; 61. Vertical pole; 62. Cross bar; 63. Crank arm; 7. Horizontal supporting shaft; 8. Lower pressure rod; 9. Pressure wheel; 91. Ring groove; 10. Electric push rod. DETAILED DESCRIPTION

[0030] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] Embodiment 1 of the calcium carbide conveyor line of the present invention, as Figures 1 to 6 As shown, the calcium carbide conveyor line includes a conveyor track 1 and a calcium carbide conveyor train movably assembled on the conveyor track 1, and the calcium carbide conveyor train includes a plurality of calcium carbide trolleys 2 connected end to end. The conveyor track 1 is arranged in a closed ring, and a conveyor chain 3 extending along the conveyor track 1 and fixedly connected to the calcium carbide trolley 2 is arranged on the conveyor track 1. The calcium carbide trolley 2 is located above the conveyor chain 3, and the conveyor chain 3 forms a conveying flexible member of the calcium carbide conveyor line.

[0032] like Figure 1 and Figure 2 As shown, a calcium carbide furnace 4 for reacting and manufacturing calcium carbide is arranged on the inner side of the ring formed by the conveying track 1. An outlet 41 for flowing out molten calcium carbide is arranged on the upper side of the conveying track 1. A discharge point 11 for discharging the calcium carbide when the calcium carbide trolley 2 moves to this position is arranged at a position away from the calcium carbide furnace 4. There are two discharge points 11 in total. A motor 5 for driving the conveying chain 3 to move is arranged between the two discharge points 11. A driving sprocket fixedly connected to the conveying chain 3 to drive the conveying chain 3 to move is mounted on the output shaft of the motor 5. A group of calcium carbide conveying trains are arranged between each of the two discharge points 11 and the calcium carbide furnace 4. One of the two groups of calcium carbide conveying trains can be used as a spare group to ensure the transportation of calcium carbide when the other group of calcium carbide conveying trains fails for maintenance.

[0033] like Figure 1 , Figure 3 and Figure 4 As shown, the height of the unloading point 11 of the conveying track 1 is higher than the height of the outlet 41 of the calcium carbide furnace 4, and the calcium carbide trolley 2 flips over at the unloading point 11 to dump the calcium carbide. The conveying track 1 has an inclined conveying section 12 with a gradually increasing height near the unloading point 11 and a lower horizontal conveying section 13 transitionally connected to the bottom of the slope of the inclined conveying section 12 between the unloading point 11 and the calcium carbide furnace 4. The slope of the inclined conveying section 12 is 5.95 degrees to prevent the material in the calcium carbide trolley 2 from flowing out. The two unloading points 11 of the annular conveying track 1 are each provided with an inclined conveying section 12 and a lower horizontal conveying section 13 between the calcium carbide furnace 4, and the two inclined conveying sections 12 are arranged in parallel.

[0034] like Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a pressing device for pressing down the conveying chain 3 is also arranged at the bottom of the slope of the inclined conveying section 12. The pressing device includes a door-shaped bracket 6, which includes a vertically arranged upright pole 61 and a cross bar 62 connected between the top ends of the two upright poles 61. There are two upright poles 61 and they are symmetrically arranged on both sides of the extension direction of the conveying track 1. The top ends of the two upright poles 61 are also rotatably equipped with transverse support shafts 7, and the axial direction of the transverse support shafts 7 is perpendicular to the conveying direction of the conveying track 1. A pressing rod 8 is arranged on each of the two transverse support shafts 7. The two pressing rods 8 correspond to the two inclined conveying sections 12 one by one to press down the conveying chain 3 on the two inclined conveying sections 12. The pressing rod 8 and the transverse support shaft 7 are arranged in a T-shape and are anti-rotationally matched. The pressing rod 8 and the conveying chain 3 are located in the same vertical plane to ensure that the force applied by the pressing rod 8 to the conveying chain 3 remains in the vertical plane.

[0035] The lower ends of the two pressing rods 8 away from the transverse support shaft 7 are respectively rotatably equipped with a pressing wheel 9, and the rotation axis of the pressing wheel 9 is parallel to the rotation axis of the transverse support shaft 7. When the pressing rod 8 swings to the lowest position, the pressing wheel 9 presses down the conveying chain 3 to prevent the conveying chain 3 from rising, and the pressing rod 8 is in the pressing position; when the pressing rod 8 leaves the lowest position, a space for the calcium carbide trolley 2 to pass through is formed between the pressing wheel 9 and the conveying track 1 to avoid the calcium carbide trolley 2, and the pressing rod 8 is in the avoiding position; the pressing wheel 9 forms a pressing structure for pressing down the conveying chain 3 when the pressing rod 8 swings back and forth. An annular groove 91 arranged around the rotation axis of the pressing wheel 9 is provided on the outer peripheral surface of the pressing wheel 9, and the annular groove 91 can accommodate the conveying chain 3, thereby limiting the side of the conveying chain 3 to prevent the conveying chain 3 from detaching from the pressing wheel 9 from the side; in other embodiments, the annular groove 91 can also be omitted, and the pressing wheel 9 uses the outer peripheral surface to press down the conveying chain 3.

[0036] like Figure 4 , Figure 5 and Figure 6 As shown, the pressing device also includes an electric push rod 10 that drives the lateral support shaft 7 to rotate to drive the pressing rod 8 to swing. A mounting seat for installing the electric push rod 10 is fixed on the ground. The housing of the electric push rod 10 is hinged with the mounting seat. The lateral support shaft 7 is fixed with a crank arm 63. The piston rod of the electric push rod 10 is hinged with the crank arm 63 on the lateral support shaft 7. When the piston rod of the electric push rod 10 is extended and retracted, the lateral support shaft 7 is driven to rotate through the crank arm 63, thereby driving the pressing rod 8 to swing back and forth between the pressing position and the avoidance position. The electric push rod 10 forms a driving structure that drives the pressing rod 8 to swing. There are two electric push rods 10 to drive the two pressing rods 8 to swing respectively. The two pressing rods 8 swing independently and do not interfere with each other.

[0037] The calcium carbide conveyor line also includes a control system for controlling the movement of the electric push rod 10. The control system includes a controller connected to the control of the electric push rod 10 and a position sensor for detecting the position of the calcium carbide trolley 2. The position sensor and the controller are signal-connected. In this embodiment, the position sensor is an ultrasonic sensor. The ultrasonic sensor detects the position of the calcium carbide trolley 2 and transmits the position signal to the controller. The controller controls the telescopic movement of the electric push rod 10 according to the position signal, thereby driving the lower pressure rod 8 to swing. The detection method of the ultrasonic sensor detecting the position of an object and the control method of the controller driving the device to move according to the position signal are prior arts and will not be described in detail here. Of course, in other embodiments, the ultrasonic sensor can also be replaced by an infrared sensor.

[0038] When the calcium carbide conveyor line of the present invention is in use, the calcium carbide trolley 2 receives the molten calcium carbide from the outlet 41 of the calcium carbide furnace 4, the motor 5 is started and drives the conveying chain 3 to move through the driving sprocket, and the conveying chain 3 drives the calcium carbide trolley 2 fixedly connected thereto to move on the conveying track 1; the calcium carbide trolley 2 is located above the conveying chain 3, and when the calcium carbide trolley 2 is still on the lower horizontal conveying section 13 and has not traveled to the inclined conveying section 12, the controller controls the electric push rod 10 to be in a retracted state, at which time the pressing rod 8 is at the lowest end of the swing stroke, the pressing wheel 9 presses down the conveying chain 3 to prevent the conveying chain 3 from rising, and the pressing rod 8 is in a pressing position; when the calcium carbide trolley 2 travels to the bottom of the slope of the inclined conveying section 12, the ultrasonic The ultrasonic sensor senses the position of the calcium carbide trolley 2 and transmits the position signal to the controller, and the controller drives the electric push rod 10 to extend. The electric push rod 10 drives the pressure rod 8 to swing upward through the crank arm 63 and the lateral support shaft 7, and the pressure wheel 9 disengages from the conveying chain 3. At the same time, the calcium carbide trolley 2 presses the conveying chain 3 downward to prevent the conveying chain 3 from rising. The pressure wheel 9 swings upward with the pressure rod 8 to avoid the calcium carbide trolley 2. At this time, the pressure rod 8 is in the avoidance position; after all the calcium carbide trolleys 2 have passed the bottom of the inclined conveying section 12, the ultrasonic sensor senses the position of the calcium carbide trolley 2, and the controller controls the electric push rod 10 to retract, the pressure rod 8 swings downward, and the pressure wheel 9 presses down the conveying chain 3 to prevent the conveying chain 3 from rising.

[0039] Embodiment 2 of the calcium carbide conveyor line of the present invention is different from Embodiment 1 in that: in Embodiment 1, there are two lateral support shafts, and a downward pressure rod is respectively provided on the two lateral support shafts. In the present embodiment, there is only one lateral support shaft, and two downward pressure rods are arranged at intervals along the axial direction of the lateral support shaft. The two downward pressure rods swing synchronously or one is in the downward pressure position while the other is in the avoidance position.

[0040] Embodiment 3 of the calcium carbide conveyor line of the present invention is different from Embodiment 1 in that: in Embodiment 1, the two electric push rods respectively drive the down-pressing rods to swing independently, while in this embodiment, the two down-pressing rods are controlled to be linked through a controller, and when one of the two down-pressing rods is in the down-pressing position, the other is in the avoidance position.

[0041] Embodiment 4 of the calcium carbide conveyor line of the present invention is different from Embodiment 1 in that the driving structure for driving the lower pressure rod to swing in Embodiment 1 is an electric push rod, while in this embodiment, the driving structure is a hydraulic cylinder or a pneumatic cylinder.

[0042] Embodiment 5 of the calcium carbide conveyor line of the present invention differs from Embodiment 1 in that: in Embodiment 1, the downward pressure structure is a pressure wheel rotatably assembled on the downward pressure rod, while in this embodiment, the end of the downward pressure rod is fixedly connected with a pressure block by bolts, and the pressure block forms the downward pressure structure.

[0043] Embodiment 6 of the calcium carbide conveyor line of the present invention is different from Embodiment 1 in that the conveying flexible member of the calcium carbide conveyor line in Embodiment 1 is a conveying chain, while in this embodiment, the conveying flexible member is a conveying belt or a conveying wire rope.

[0044] The specific structure of the embodiment of the pressing device for pressing down the conveying flexible member of the present invention is the same as the specific structure of the pressing device in any embodiment of the above-mentioned calcium carbide conveying line, and will not be repeated here.

Claims

1. A pressing device for pressing down a flexible member for conveying, used in a calcium carbide conveying line, characterized in that: The invention comprises a bracket, on which a pressure rod is hingedly assembled along a horizontal axis, the lower end of the pressure rod is provided with a pressure structure which is arranged above the conveying flexible member to press down the conveying flexible member to prevent the conveying flexible member from rising at the bottom of the slope along the extending direction of the conveying flexible member, the pressure rod has a pressure position in its swing stroke for lowering so that the pressure structure can press down the conveying flexible member and an avoidance position for raising so that the pressure structure can avoid the corresponding calcium carbide trolley, the pressure device also comprises a driving structure for driving the pressure rod to swing back and forth between the pressure position and the avoidance position, the conveying flexible member is a conveying chain, the pressure structure is a pressure wheel rotatably assembled at the lower end of the pressure rod, the pressure rod and the conveying chain are located in the same vertical plane, when the pressure rod swings to the lowest point, the pressure wheel presses down the conveying chain to prevent the conveying chain from rising, and when the calcium carbide trolley arrives, the pressure rod rises to avoid the calcium carbide trolley.

2. The pressing device for pressing down a flexible member for conveying according to claim 1, characterized in that: An annular groove for accommodating the conveying flexible member is provided on the outer circumference of the pressing wheel.

3. The pressing device for pressing down a flexible member for conveying according to claim 1 or 2, characterized in that: The bracket is provided with a transverse support shaft extending in the horizontal direction, the transverse support shaft is located above the conveying flexible member, and the lower pressure rod and the transverse support shaft are in a T-shaped structure.

4. The pressing device for pressing down a flexible member for conveying according to claim 1 or 2, characterized in that: The bracket is provided with a transverse supporting shaft extending in the horizontal direction, and two pressing rods are arranged on the transverse supporting shaft at intervals in the horizontal direction. The pressing structures on the two pressing rods are staggered in the swinging circumference of the pressing rods so that when one pressing structure rises, the other pressing structure presses down.

5. The pressing device for pressing down a flexible member for conveying according to claim 4, characterized in that: Each of the down-pressing rods is arranged in a T shape with the transverse supporting shaft.

6. A calcium carbide conveyor line, comprising a conveyor track, on which a calcium carbide conveyor train is movably mounted, the calcium carbide conveyor train comprising a plurality of calcium carbide trolleys, the calcium carbide conveyor line further comprising a conveyor flexible member extending along the conveyor track and fixedly connected to the corresponding calcium carbide trolleys, the conveyor track having an inclined conveyor section and a lower horizontal conveyor section transitionally connected to the bottom of the slope of the inclined conveyor section, the calcium carbide trolley being located above the conveyor flexible member when moving to the inclined conveyor section and the lower horizontal conveyor section, characterized in that: The cam is provided with a pressing device for pressing down a conveying flexible member at the bottom of the slope of the corresponding inclined conveying section, the pressing device comprising a bracket, a pressing rod is hingedly installed on the bracket along a horizontal axis, the lower end of the pressing rod is provided with a pressing structure arranged above the conveying flexible member to press down the conveying flexible member to prevent the conveying flexible member from rising along the extension direction of the conveying flexible member at the bottom of the slope, the pressing rod has a pressing position in its swing stroke for lowering the pressing structure to press down the conveying flexible member and an avoiding position for raising the pressing structure to avoid the corresponding calcium carbide trolley, the pressing device also includes a driving structure for driving the pressing rod to swing back and forth between the pressing position and the avoiding position, the conveying flexible member is a conveying chain, the pressing structure is a pressing wheel rotatably installed at the lower end of the pressing rod, the pressing rod and the conveying chain are located in the same vertical plane, when the pressing rod swings to the lowest point, the pressing wheel presses down the conveying chain to prevent the conveying chain from rising, and when the calcium carbide trolley arrives, the pressing rod rises to avoid the calcium carbide trolley.

7. The calcium carbide conveyor line according to claim 6, characterized in that: An annular groove for accommodating the conveying flexible member is provided on the outer circumference of the pressing wheel.

8. The calcium carbide conveyor line according to claim 6 or 7, characterized in that: The bracket is provided with a transverse support shaft extending in the horizontal direction, the transverse support shaft is located above the conveying flexible member, and the lower pressure rod and the transverse support shaft are in a T-shaped structure.

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