A flight bar tensioning device

Abstract

The application relates to a scraper tensioning device, and relates to the technical field of scrapers, which comprises a sliding block arranged on a tail shell and a monitoring center for monitoring the tail shell, a chain wheel is rotationally connected to the sliding block, an adjusting sliding groove is arranged on the tail shell, the sliding block is slidingly connected in the adjusting sliding groove, and a detection device for detecting the tension degree of a chain and an adjusting device for adjusting the position of the sliding block are arranged on the tail shell. The application has the effect that the tension degree of the chain can be timely and moderately adjusted.

Description

Technical Field

[0001] This application relates to the field of scraper conveyor technology, and in particular to a scraper conveyor tensioning device. Background Technology

[0002] Scraper conveyors are transport machinery used in coal mine working faces. They are mainly used for transporting coal in working faces and mining roadways, and can also be used in coal roadways and semi-coal-rock roadway excavation faces. However, when it is necessary to tension them according to actual working needs and remove excess chain links, it is a very difficult task.

[0003] In related technologies, a chain clamping device is usually used for clamping. The process is to insert one end of the chain clamping device into the round holes on the left and right side plates of the machine head frame, and the other end into the vertical rings at the symmetrical positions of the two circular links on the chain. Start the machine in reverse to turn the slack chain to the machine head. At the moment of stopping, remove the excess chain and connect the circular links. Then remove the chain clamping device.

[0004] Taking the blasting face as an example, the chain usually needs to be spliced ​​once every certain period of time. The splicing of the chain requires high skill from the scraper conveyor operator. The personnel splicing the chain on both sides of the machine head need to react quickly and cooperate well with the scraper conveyor operator. If the cooperation is not good, the chain splicing may cause hand injury, which will bring great safety hazards.

[0005] A scraper conveyor tensioning device, as disclosed in CN203306612U, includes two fixed plates. Each fixed plate has internal threaded holes along its length, and a screw is installed within these holes to match the fixed plate. The two fixed plates are symmetrically welded to the tail housing near the tail wheel axle. The tension of the scraper conveyor chain is adjusted by using the screws. While this device solves the problem of the scraper conveyor chain being difficult to tension and adjust, the adjustment time and process require worker monitoring, which may result in delayed or insufficient chain tension adjustment. Summary of the Invention

[0006] In order to adjust the tension of the chain in a timely and appropriate manner, this application provides a scraper conveyor tensioning device.

[0007] The scraper conveyor tensioning device provided in this application adopts the following technical solution: A scraper conveyor tensioning device includes a slider disposed on the tail shell and a monitoring center for monitoring the tail shell. A sprocket is rotatably connected to the slider. An adjustment groove is provided on the tail shell, and the slider is slidably connected in the adjustment groove. The tail shell is provided with a detection device for detecting the chain tension and an adjustment device for adjusting the position of the slider.

[0008] By adopting the above technical solution, the tension of the chain can be detected by the detection device. When the chain is loose, the position of the slider in the groove can be adjusted by the adjustment component, thereby changing the position of the sprocket on the slider and thus tightening the chain in time. At the same time, the tension of the chain can be monitored in real time by the monitoring center. This can save the process of monitoring and operation by workers and allow for timely and appropriate adjustment of the chain tension, reducing the occurrence of delayed chain tension adjustment or insufficient tension.

[0009] Optionally, the adjusting device includes a hydraulic cylinder and a tensioning master station for controlling the extension and retraction of the hydraulic cylinder. The tensioning master station is electrically connected to the hydraulic cylinder, the hydraulic cylinder is fixedly connected to the tail housing, and the piston rod of the hydraulic cylinder is fixedly connected to the slider.

[0010] By adopting the above technical solution, the extension and retraction of the hydraulic cylinder can be controlled by the main clamping station, thereby causing the hydraulic cylinder to drive the slider to slide in the adjusting groove, thereby quickly changing the position of the sprocket.

[0011] Optionally, the detection device includes a pressure sensor and a displacement sensor for detecting the distance the slider moves within the adjusting groove. The pressure sensor is fixed between the piston rod of the hydraulic cylinder and the slider. The tensioning main station is electrically connected to both the pressure sensor and the displacement sensor.

[0012] By adopting the above technical solution, the pressure of the chain on the sprocket can be detected by the pressure sensor, thereby detecting the tension of the chain. At the same time, the position of the slider in the groove can be detected by the motion sensor, and the information is transmitted to the tensioning master station, which controls the extension and retraction length of the hydraulic cylinder.

[0013] Optionally, a detection groove is provided on the tail housing, and the detection device includes a detection block slidably connected in the detection groove, a detection wheel rotatably connected to the detection block, the detection wheel abutting against the chain, and a detection spring fixed between the detection groove and the detection block, and the detection wheel abutting against the chain under the support of the detection spring.

[0014] By adopting the above technical solution, when the chain is loose, the detection spring can extend, thereby driving the detection block to move in the detection groove, thus initially tensioning the chain, and the tension state of the chain can be determined by the extension length of the spring.

[0015] Optionally, the adjustment device includes a support plate disposed on one side of the tail housing, an electromagnet mounted on the support plate, an iron plate disposed between the electromagnet and the tail housing, the iron plate being slidably connected to the support plate, a connecting rod being fixedly connected between the iron plate and the slider, a wire for energizing the electromagnet being disposed on the support plate, a switch being mounted on the wire, and the adjustment device further includes a control component for controlling the switch to open.

[0016] By adopting the above technical solution, when it is necessary to tension the chain, the control switch can be turned on through the control component, thereby energizing the electromagnet, causing the electromagnet to attract the iron plate, and causing the iron plate to slide towards the electromagnet. This causes the iron plate to drive the slider to slide towards the electromagnet through the connection, and then causes the sprocket to slide towards the electromagnet, thereby tensioning the chain.

[0017] Optionally, the control component includes a magnetic blocking plate with an abutment block fixedly attached to it. The magnetic blocking plate is slidably connected to the support plate. A pit is formed in the ground directly below the magnetic blocking plate. A limiting plate for supporting the magnetic blocking plate is provided at the lower end of the magnetic blocking plate. A transmission rod is fixedly connected between the limiting plate and the detection block. The magnetic blocking plate abuts against the limiting plate. When the magnetic blocking plate is placed in the pit, the abutment block abuts against the switch, thereby turning on the switch.

[0018] By adopting the above technical solution, the magnetic blocking plate can reduce the attraction force between the electromagnet and the iron plate when the electromagnet is not energized. At the same time, the detection spring can drive the limiting plate to move through the transmission rod. When the detection spring extends to a certain extent, the limiting plate will cancel the contact with the magnetic blocking plate, and the magnetic blocking plate will fall into the pit. When the magnetic blocking plate is placed in the pit, the abutment block will abut against the switch, thereby automatically opening the switch and energizing the electromagnet to attract the iron plate.

[0019] Optionally, buffer plates are provided on both inner side walls of the pit to reduce the descent speed of the magnetic blocking plate, and buffer springs are fixed between the buffer plates and the inner walls of the pit.

[0020] By adopting the above technical solution, when the magnetic blocking plate enters the foundation pit, the buffer plate can be used to abut the magnetic blocking plate and reduce the falling speed of the buffer plate in the foundation pit.

[0021] Optionally, a sliding rod is fixedly connected to the support plate, and a sliding hole is provided on the iron plate. The sliding hole corresponds one-to-one with the sliding rod, and the sliding rod passes through the sliding hole. A guide wheel is slidably connected to the sliding rod, and the guide wheel is rotatably connected to the iron plate.

[0022] By adopting the above technical solution, when the iron plate moves, it can slide on the slide rod through the guide wheel, thereby reducing the resistance of the iron plate moving on the slide rod.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. It can change the position of the sprocket on the slider, thereby tensioning the chain in a timely manner. At the same time, the tension of the chain can be monitored in real time through the monitoring center, which can save the process of monitoring and operation by workers, and can make appropriate adjustments to the chain tension in a timely manner, reducing the occurrence of delayed chain tension adjustment or insufficient tension. 2. The switch can be turned on by the control component, thereby energizing the electromagnet, causing the electromagnet to attract the iron plate, and causing the iron plate to slide towards the electromagnet. This causes the iron plate to drive the slider to slide towards the electromagnet, which in turn causes the sprocket to slide towards the electromagnet, thereby tensioning the chain. 3. The magnetic blocking plate will fall into the pit, and when the magnetic blocking plate is placed in the pit, the abutment block will abut against the switch, thereby automatically turning on the switch, which in turn energizes the electromagnet to attract the iron plate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a schematic diagram of the slider structure of Embodiment 1 of this application; Figure 3 This is a schematic diagram of the adjustment device according to Embodiment 2 of this application; Figure 4 This is a schematic diagram of the guide wheel in Embodiment 2 of this application; Figure 5 This is a schematic diagram of the structure of the buffer plate in Embodiment 2 of this application.

[0025] In the diagram: 1. Tail housing; 11. Adjustment slide; 12. Detection slide; 2. Slider; 3. Sprocket; 4. Detection device; 41. Displacement sensor; 42. Pressure sensor; 43. Detection block; 44. Detection wheel; 45. Detection spring; 5. Adjustment device; 51. Hydraulic cylinder; 52. Support plate; 521. Slide rod; 53. Connecting rod; 54. Electromagnet; 55. Iron plate; 551. Slide hole; 56. Guide wheel; 57. Switch; 58. Control component; 581. Magnetic plate; 582. Abutment block; 583. Limiting plate; 584. Transmission rod; 6. Pit; 7. Buffer plate; 71. Buffer spring; 8. Guide rod. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0027] Example 1: A tensioning device for a scraper conveyor, referring to... Figure 1 and Figure 2 The system includes a slider 2 mounted on the tail housing 1, with an adjusting groove 11 extending along the length of the tail housing 1. The slider 2 is slidably connected within the adjusting groove 11. A sprocket 3 in the scraper conveyor is rotatably connected to the slider 2. The tail housing 1 is equipped with an adjusting assembly for changing the position of the slider 2 and a detection device 4 for detecting the chain tension.

[0028] The adjusting device 5 includes a hydraulic cylinder 51 and a tensioning main station (not shown in the figure). The tensioning main station is a controller and can be used to control the extension and retraction of the hydraulic cylinder 51. The tensioning main station is electrically connected to the hydraulic cylinder 51. The hydraulic cylinder 51 is fixedly connected within the adjusting slide 11, and the extension and retraction direction of the hydraulic cylinder 51 is parallel to the opening direction of the adjusting slide 11. The piston rod of the hydraulic cylinder 51 is fixedly connected to the slider 2.

[0029] The detection device 4 includes a pressure sensor 42 and a displacement sensor 41. The pressure sensor 42 is used to detect the pressure between the end of the piston rod of the hydraulic cylinder 51 and the slider 2, and the displacement sensor 41 is used to detect the movement distance of the slider 2 within the adjusting groove 11. The pressure sensor 42 is fixedly connected between the piston rod of the hydraulic cylinder 51 and the slider 2, and the displacement sensor 41 is installed in the adjusting groove 11 and passes through the slider 2 and is slidably connected to the slider 2. The tensioning main station is electrically connected to both the pressure sensor 42 and the displacement sensor 41.

[0030] A scraper conveyor tensioning device further includes a monitoring center for monitoring the tail shell 1, the monitoring center being used to display images of the tail shell 1.

[0031] The implementation principle of Embodiment 1 of this application is as follows: During use, the pressure sensor 42 can detect the pressure of the chain on the sprocket 3, thereby detecting the chain tension and transmitting the information to the tensioning master station. When the chain is loose, the tensioning master station can control the extension and retraction length of the hydraulic cylinder 51, thereby adjusting the position of the slider 2 in the adjusting groove 11, and thus tensioning the chain in a timely manner. At the same time, the tension status of the chain can be monitored in real time through the monitoring center.

[0032] Example 2 The difference from Example 1 is that: (Refer to...) Figure 3 Two adjustment grooves 11 are provided on the tail housing 1. A slider 2 is slidably connected in each of the two adjustment grooves 11. A sprocket 3 is rotatably connected to the slider 2 and meshes with the chain.

[0033] A detection groove 12 is provided on the tail housing 1, and the detection groove 12 is positioned between two adjusting grooves 11. The detection device 4 includes a detection block 43 slidably connected in the detection groove 12, and two detection wheels 44 are rotatably connected to the detection block 43, both of which abut against the chain. A detection spring 45 is fixedly connected between the inner wall of the detection groove 12 and the detection block 43. Under the force of the detection spring 45, the detection wheels 44 are pressed against the chain.

[0034] Therefore, when the chain becomes loose, the elastic force of the detection spring 45 can cause the detection wheel 44 to press against the chain, thus providing an initial tensioning effect on the chain.

[0035] Reference Figure 3 and Figure 4 The adjusting device 5 includes a support plate 52 disposed on one side of the tail housing 1, with the support plate 52 and the tail housing 1 located in the same plane. An electromagnet 54 is fixedly connected to the support plate 52, and an iron plate 55 is disposed between the electromagnet 54 and the tail housing 1. Two sliding holes 551 are formed in the iron plate 55, and two guide wheels 56 are disposed in the sliding holes 551 and rotatably connected to the iron plate 55. A sliding rod 521 passes through the sliding holes 551, and the sliding holes 551 are fixedly connected to the support plate 52, while the guide wheels 56 are slidably connected to the sliding rod 521. Thus, the iron plate 55 is slidably connected to the support plate 52 through the guide wheels 56 and the sliding rod 521.

[0036] A connecting rod 53 is fixedly connected between the iron plate 55 and each of the two sliders 2. A wire for energizing the electromagnet 54 is provided on the support plate 52; the wire is not shown in the figure. A switch 57 for controlling whether the electromagnet 54 is energized is installed on the wire. The adjusting device 5 also includes a control component 58 for controlling the opening of the switch 57.

[0037] Reference Figure 3 and Figure 5 The control component 58 includes a magnetic shielding plate 581, which is made of a material with good magnetic shielding effect, such as wood or rubber. The magnetic shielding plate 581 is placed between the electromagnet 54 and the iron plate 55. The magnetic shielding plate 581 can reduce the attraction force between the electromagnet 54 and the iron plate 55 when the electromagnet 54 is not energized. A plurality of guide rods 8 are fixedly connected to the support plate 52. The guide rods 8 are arranged along the length direction of the magnetic shielding plate 581, and the magnetic shielding plate 581 is slidably connected to the guide rods 8. An abutment block 582 is fixedly connected to the magnetic shielding plate 581, which is used to turn on the switch 57. A pit 6 is opened in the ground directly below the magnetic shielding plate 581. The lower end of the magnetic blocking plate 581 is provided with a limiting plate 583 for supporting the magnetic blocking plate 581. The upper end of the limiting plate 583 abuts against the lower end of the magnetic blocking plate 581. A transmission rod 584 is fixedly connected between the limiting plate 583 and the detection block 43.

[0038] Both inner walls of the pit 6 are equipped with buffer plates 7 to reduce the descent speed of the magnetic blocking plate 581. The side of the two buffer plates 7 that is close to each other is set as an inclined surface, and the upper ends of the two buffer plates 7 are inclined towards the side that is far away from each other. A buffer spring 71 is fixedly connected between the buffer plate 7 and the inner wall of the pit 6.

[0039] By adopting the above technical solution, when the magnetic blocking plate 581 enters the pit 6, the buffer plate 7 can be used to abut the magnetic blocking plate 581 and reduce the falling speed of the buffer plate 7 in the pit 6.

[0040] The implementation principle of Embodiment 2 of this application is as follows: When the detection spring 45 extends to a certain extent, the limiting plate 583 will release its contact with the magnetic blocking plate 581, and the magnetic blocking plate 581 will fall under the restriction of the guide rod 8 until it falls into the pit 6 under the buffering effect of the buffer plate 7. When the magnetic blocking plate 581 is placed in the pit 6, the abutment block 582 will abut against the switch 57 and press the switch 57, thereby opening the switch 57, which will then energize the electromagnet 54 and cause the electromagnet 54 to attract the iron plate 55. This causes the iron plate 55 to move along the slide rod 521 toward the electromagnet 54, and the iron plate 55 will then drive the slider 2 toward the electromagnet 54 through the connecting rod 53, thereby causing the slider 2 and the sprocket 3 to move toward the iron plate 55 and thus tensioning the chain.

[0041] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tensioning device for a scraper conveyor, characterized in that, The system includes a slider (2) mounted on the tail housing (1) and a monitoring center for monitoring the tail housing (1). A sprocket (3) is rotatably connected to the slider (2). An adjustment groove (11) is provided on the tail housing (1), and the slider (2) is slidably connected within the adjustment groove (11). The tail housing (1) is provided with a detection device (4) for detecting the chain tension and an adjustment device (5) for adjusting the position of the slider (2). A detection groove (12) is provided on the tail housing (1). The detection device (4) includes a detection block (43) slidably connected within the detection groove (12). A detection wheel (44) is rotatably connected to the block (43), the detection wheel (44) abuts against the chain, and a detection spring (45) is fixed between the detection groove (12) and the detection block (43). Under the support of the detection spring (45), the detection wheel (44) abuts against the chain. The adjustment device (5) includes a support plate (52) disposed on one side of the tail shell (1). An electromagnet (54) is installed on the support plate (52). An iron plate (55) is provided between the electromagnet (54) and the tail shell (1). The iron plate (55) is slidably connected to the support plate (52). A connecting rod (53) is fixedly connected between the slider (2) and the support plate (52). A wire for energizing the electromagnet (54) is provided on the support plate (52). A switch (57) is installed on the wire. The adjustment device (5) also includes a control component (58) for controlling the switch (57) to open. The control component (58) includes a magnetic blocking plate (581). An abutment block (582) is fixedly connected to the magnetic blocking plate (581). The magnetic blocking plate (581) is slidably connected to the support plate (52). A pit (6) is opened in the ground directly below the magnetic blocking plate (581). The lower end of the magnetic blocking plate (581) is provided with A limiting plate (583) is used to support the magnetic blocking plate (581). A transmission rod (584) is fixed between the limiting plate (583) and the detection block (43). The magnetic blocking plate (581) abuts against the limiting plate (583). When the magnetic blocking plate (581) is placed in the pit (6), the abutting block (582) abuts against the switch (57) and turns the switch (57) on. Buffer plates (7) are provided on both inner walls of the pit (6) to reduce the descent speed of the magnetic blocking plate (581). A buffer spring (71) is fixed between the buffer plate (7) and the inner wall of the pit (6).

2. The scraper conveyor tensioning device according to claim 1, characterized in that, A sliding rod (521) is fixedly connected to the support plate (52), and a sliding hole (551) is opened on the iron plate (55). The sliding hole (551) corresponds one-to-one with the sliding rod (521), and the sliding rod (521) passes through the sliding hole (551). A guide wheel (56) is slidably connected to the sliding rod (521), and the guide wheel (56) is rotatably connected to the iron plate (55).

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