Scraper tensioning device

Abstract

The invention relates to a scraper conveyor tensioning device, and relates to the technical field of scraper conveyors, the scraper conveyor tensioning device comprises a sliding block arranged on a conveyor tail shell and a monitoring center used for monitoring the conveyor tail shell, a chain wheel is rotatably connected to the sliding block, an adjusting sliding groove is formed in the conveyor tail shell, the sliding block is slidably connected in the adjusting sliding groove, and the chain wheel is rotatably connected to the sliding block. The tail shell is provided with a detection device used for detecting the tensioning degree of the chain and an adjusting device used for adjusting the position of the sliding block. The chain tensioning device has the effect of properly adjusting the tensioning degree of the chain in time.

Description

Technical Field

[0001] The present application relates to the technical field of scraper machines, and in particular to a tensioning device for scraper machines. Background Art

[0002] Scraper is a transport machine used in coal mining working face. It is mainly used for coal mining working face and mining area chute transportation, and can also be used in coal tunnel and semi-coal rock tunnel excavation working face. However, it is very difficult to tension it according to actual work needs or remove the excess chain link.

[0003] In the related technology, a chain pincher is usually used for pinching and splicing. The process is to insert one end of the chain pincher into the round holes on the left and right side plates of the machine head frame respectively, and the other end into the vertical rings at the symmetrical position of the circular chain on both sides. Start the machine in reverse, turn the slack chain to the machine head, remove the excess chain at the moment of stopping, connect the circular chain, and then remove the chain pincher.

[0004] Taking the blasting working face as an example, under normal circumstances, the chain needs to be spliced ​​once every certain period of time, and the chain splicing requires very high ignition skills from the scraper driver. The chain splicers on both sides of the machine head must react quickly and cooperate well with the scraper driver. If the cooperation is improper, the chain splicing may cause hands to touch accidentally, thus posing a greater safety hazard.

[0005] Reference publication number: CN203306612U is a tensioning device for a scraper, comprising two fixing plates, inner thread holes are provided on the fixing plates along the length direction, screws are provided in the inner thread holes to match the fixing plates, and the two fixing plates are symmetrically welded to one side of the tail shell close to the tail wheel shaft. The tension of the scraper chain is adjusted by the screw to achieve the purpose of adjusting the tension of the scraper chain. Although the above device solves the problem that the scraper chain is difficult to tension and adjust, the adjustment time needs to be monitored by workers and the adjustment process needs to be controlled by workers, which may cause the chain tension adjustment to lag or insufficient tension. Summary of the invention

[0006] In order to timely and appropriately adjust the tension of the chain, the present application provides a scraper conveyor tensioning device.

[0007] The present application provides a scraper tensioning device that adopts the following technical solution: A scraper conveyor tensioning device comprises a slider arranged on a tail shell and a monitoring center for monitoring the tail shell, a sprocket is rotatably connected to the slider, an adjustment slot is provided on the tail shell, the slider is slidably connected in the adjustment slot, and a detection device for detecting the chain tension degree and an adjustment device for adjusting the position of the slider are provided on the tail shell.

[0008] By adopting the above technical scheme, the tension of the chain can be detected by the detection device. When the chain is loose, the position of the slider in the slide groove can be adjusted by the adjustment component, thereby changing the position of the sprocket on the slider, and then the chain is tensioned in time. At the same time, the tension state of the chain can be monitored in real time by the monitoring center, thereby eliminating the process of worker monitoring and control, and the tension of the chain can be appropriately adjusted in a relatively timely manner, reducing the occurrence of chain tension adjustment lag or insufficient tension.

[0009] Optionally, the adjusting device includes a hydraulic cylinder and a tensioning main station for controlling the extension and retraction of the hydraulic cylinder, the tensioning main station is electrically connected to the hydraulic cylinder, the hydraulic cylinder is fixed to the tail housing and the piston rod of the hydraulic cylinder is fixed 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, so that the hydraulic cylinder drives the slider to slide in the adjusting slot, thereby quickly changing the position of the sprocket.

[0011] Optionally, the detection device includes a pressure sensor and a displacement sensor for detecting the moving distance of the slider in the adjusting groove, the pressure sensor is fixed between the piston rod of the hydraulic cylinder and the slider, and the tensioning master station is electrically connected to 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 slide groove can be detected by the mobile sensor, and the information can be transmitted to the tensioning master station, and the extension and retraction length of the hydraulic cylinder can be controlled by the tensioning master station.

[0013] Optionally, a detection groove is provided on the tail shell, and the detection device includes a detection block slidably connected in the detection groove, a detection wheel is rotatably connected to the detection block, the detection wheel is in contact with the chain, a detection spring is fixed between the detection groove and the detection block, and the detection wheel is pressed 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 be extended, thereby driving the detection block to move in the detection slot through the detection spring, thereby preliminarily tensioning the chain, and the tensioning state of the chain can be determined by the stretched length of the spring.

[0015] Optionally, the adjusting device includes a support plate arranged on one side of the tail shell, an electromagnet is installed on the support plate, an iron plate is provided between the electromagnet and the tail shell, the iron plate is slidably connected to the support plate, a connecting rod is fixedly connected between the iron plate and the slider, a wire for energizing the electromagnet is provided on the support plate, a switch is installed on the wire, and the adjusting device also includes a control component for controlling the switch to be turned on.

[0016] By adopting the above technical solution, when the chain needs to be tensioned, the switch can be turned on through the control component, thereby energizing the electromagnet, causing the electromagnet to adsorb the iron plate, causing the iron plate to slide toward the side of the electromagnet, thereby causing the iron plate to drive the slider to slide toward the side of the electromagnet through the connection, and then causing the sprocket to slide toward the side of the electromagnet, thereby tensioning the chain.

[0017] Optionally, the control component includes a magnetic blocking plate, a contact block is fixedly connected to the magnetic blocking plate, the magnetic blocking plate is slidably connected to the support plate, a foundation pit is opened on the ground directly below the magnetic blocking plate, a limit 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 limit plate and the detection block, the magnetic blocking plate abuts against the limit plate, and when the magnetic blocking plate is placed in the foundation pit, the contact block abuts against the switch to turn on the switch.

[0018] By adopting the above technical scheme, the magnetic resistance plate can reduce the adsorption force between the electromagnet and the iron plate when the electromagnet is not energized. At the same time, the detection spring can drive the limit plate to move through the transmission rod. When the detection spring is extended to a certain extent, the limit plate will cancel the abutment with the magnetic resistance plate, so that the magnetic resistance plate will fall into the foundation pit, and when the magnetic resistance plate is placed in the foundation pit, the abutment block will abut against the switch, thereby automatically turning on the switch, and then the electromagnet is energized to adsorb the iron plate.

[0019] Optionally, buffer plates for reducing the descending speed of the magnetic resistance plate are provided on both inner side walls of the foundation pit, and buffer springs are fixedly connected between the buffer plates and the inner walls of the foundation 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 against 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, a sliding hole is opened on the iron plate, the sliding holes correspond to the sliding rods one by one and the sliding rods pass through the sliding holes, 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 bar through the guide wheel, thereby reducing the resistance of the iron plate moving on the slide bar.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The position of the sprocket on the slider can be changed, so as to timely tighten the chain. At the same time, the tension state of the chain can be monitored in real time through the monitoring center, thereby eliminating the process of worker monitoring and control, and timely adjusting the tension of the chain appropriately, 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 adsorb the iron plate, causing the iron plate to slide toward the electromagnet, thereby causing the iron plate to drive the slider to slide toward the electromagnet through the connection, and then causing the sprocket to slide toward the electromagnet, thereby tightening the chain; 3. The magnetic blocking plate will fall into the foundation pit, and when the magnetic blocking plate is placed in the foundation pit, the abutment block will abut against the switch, thereby automatically opening the switch, and then energizing the electromagnet to adsorb the iron plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 is a schematic structural diagram of a slider according to Embodiment 1 of the present application; Figure 3 is a schematic structural diagram of the regulating device of Example 2 of the present application; Figure 4 is a schematic structural diagram of the guide wheel of Example 2 of the present application; Figure 5 It is a schematic diagram of the structure of the buffer plate of Example 2 of the present application.

[0025] In the figure, 1, tail housing; 11, adjusting 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, adjusting device; 51, hydraulic cylinder; 52, support plate; 521, slide bar; 53, connecting rod; 54, electromagnet; 55, iron plate; 551, slide hole; 56, guide wheel; 57, switch; 58, control component; 581, magnetic resistance plate; 582, abutment block; 583, limit plate; 584, transmission rod; 6, foundation pit; 7, buffer plate; 71, buffer spring; 8, guide rod. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.

[0027] Embodiment 1: A tensioning device for a scraper, referring to Figure 1 and Figure 2 , including a slider 2 arranged on the tail housing 1, the tail housing 1 is provided with an adjustment slot 11 arranged along the length direction of the tail housing 1, and the slider 2 is slidably connected in the adjustment slot 11. The sprocket 3 in the scraper is rotatably connected to the slider 2. The tail housing 1 is provided with an adjustment component for changing the position of the slider 2 and a detection device 4 for detecting the tension of the chain.

[0028] The adjusting device 5 includes a hydraulic cylinder 51 and a tensioning master station, which is not shown in the figure. The tensioning master station is a controller and can be used to control the extension and retraction of the hydraulic cylinder 51. The tensioning master station is electrically connected to the hydraulic cylinder 51. The hydraulic cylinder 51 is fixedly connected in the adjusting chute 11, and the extension and retraction direction of the hydraulic cylinder 51 is parallel to the opening direction of the adjusting chute 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 moving distance of the slider 2 in the adjustment slot 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 adjustment slot 11 and passes through the slider 2 and is slidably connected to the slider 2. The tensioning master station is electrically connected to both the pressure sensor 42 and the displacement sensor 41.

[0030] A tensioning device for a scraper conveyor also includes a monitoring center for monitoring the tail casing 1 , and the monitoring center is used to present a picture of the tail casing 1 .

[0031] The implementation principle of the embodiment 1 of the present application is as follows: when in use, the pressure of the chain on the sprocket 3 can be detected by the pressure sensor 42, thereby detecting the tension of the chain, and transmitting the information to the tensioning master station. When the chain is loose, the extension length of the hydraulic cylinder 51 can be controlled by the tensioning master station, thereby adjusting the position of the slider 2 in the adjusting chute 11, thereby timely tensioning the chain, and at the same time, the tensioning state of the chain can be monitored in real time through the monitoring center.

[0032] Example 2 The difference from Example 1 is that: Figure 3 Two adjusting slots 11 are provided on the tail housing 1, and sliders 2 are slidably connected in the two adjusting slots 11. Sprockets 3 are rotatably connected to the sliders 2, and the sprockets 3 are meshed with the chain.

[0033] The tail housing 1 is provided with a detection slot 12, which is placed between the two adjustment slots 11. The detection device 4 includes a detection block 43 slidably connected in the detection slot 12, and two detection wheels 44 are rotatably connected to the detection block 43, and both detection wheels 44 abut against the chain. A detection spring 45 is fixedly connected between the inner side wall of the detection slot 12 and the detection block 43, and under the action of the detection spring 45, the detection wheel 44 abuts against the chain.

[0034] Therefore, when the chain is loose, the elastic force of the detection spring 45 can make the detection wheel 44 and the chain press tightly together, which has a preliminary 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, and the support plate 52 and the tail housing 1 are 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 provided on the iron plate 55, and two guide wheels 56 are disposed in the sliding holes 551 and the guide wheels 56 are rotatably connected to the iron plate 55. A sliding rod 521 is passed through the sliding hole 551, and the sliding hole 551 is fixedly connected to the support plate 52, and 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 the two sliders 2. A wire for energizing the electromagnet 54 is provided on the support plate 52, and 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 adjustment device 5 also includes a control component 58 for controlling the switch 57 to be turned on.

[0037] Reference Figure 3 and Figure 5 The control component 58 includes a magnetic blocking plate 581, which is set to a material with good magnetic isolation effect such as a wooden board or a rubber board, and the magnetic blocking plate 581 is placed between the electromagnet 54 and the iron plate 55. The magnetic blocking plate 581 can reduce the adsorption 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, and the guide rods 8 are arranged along the length direction of the magnetic blocking plate 581, and the magnetic blocking plate 581 passes through the guide rods 8 and is slidably connected in the plurality of guide rods 8. An abutment block 582 is fixedly connected to the magnetic blocking plate 581, and the abutment block 582 is used to turn on the switch 57. A foundation pit 6 is opened on the ground directly below the magnetic blocking plate 581. A limiting plate 583 for supporting the magnetic blocking plate 581 is provided at the lower end of the magnetic blocking plate 581 , the upper end of the limiting plate 583 abuts against the lower end of the magnetic blocking plate 581 , and a transmission rod 584 is fixedly connected between the limiting plate 583 and the detection block 43 .

[0038] Buffer plates 7 are provided on both inner side walls of the foundation pit 6 to reduce the descending speed of the magnetic blocking plate 581. The sides of the two buffer plates 7 that are close to each other are set as inclined surfaces, and the upper ends of the two buffer plates 7 are inclined toward the sides that are away from each other. A buffer spring 71 is fixedly connected between the buffer plate 7 and the inner wall of the foundation pit 6.

[0039] By adopting the above technical solution, when the magnetic blocking plate 581 enters the foundation pit 6, the magnetic blocking plate 581 can be abutted by the buffer plate 7 and the falling speed of the buffer plate 7 in the foundation pit 6 can be reduced.

[0040] The implementation principle of the second embodiment of the present application is as follows: when the detection spring 45 is extended to a certain extent, the limit plate 583 will cancel the contact with the magnetic blocking plate 581, and then the magnetic blocking plate 581 will fall under the limiting effect of the guide rod 8 until it falls into the foundation pit 6 under the buffering effect of the buffer plate 7. When the magnetic blocking plate 581 is placed in the foundation pit 6, the contact block 582 will contact and press the switch 57, and turn on the switch 57, so that the electromagnet 54 is energized, so that the electromagnet 54 adsorbs the iron plate 55. As a result, the iron plate 55 moves along the slide bar 521 toward the side of the electromagnet 54, and then the iron plate 55 drives the slider 2 to move toward the side of the electromagnet 54 through the connecting rod 53, so that the slider 2 and the sprocket 3 move toward the side of the iron plate 55 to tighten the chain.

[0041] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tensioning device for a scraper, characterized in that: The invention comprises a slider (2) arranged on a 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 slot (11) is provided on the tail housing (1); the slider (2) is slidably connected in the adjustment slot (11); and a detection device (4) for detecting the tension of a chain and an adjustment device (5) for adjusting the position of the slider (2) are provided on the tail housing (1).

2. A scraper tensioning device according to claim 1, characterized in that: The adjusting device (5) comprises a hydraulic cylinder (51) and a tensioning main station for controlling 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 to the tail housing (1); and the piston rod of the hydraulic cylinder (51) is fixedly connected to the slider (2).

3. A scraper tensioning device according to claim 2, characterized in that: The detection device (4) comprises a pressure sensor (42) and a displacement sensor (41) for detecting the moving distance of the slider (2) in the adjustment slot (11); the pressure sensor (42) is fixedly connected between the piston rod of the hydraulic cylinder (51) and the slider (2); and the tensioning master station is electrically connected to both the pressure sensor (42) and the displacement sensor (41).

4. A scraper tensioning device according to claim 1, characterized in that: The tail housing (1) is provided with a detection slot (12), the detection device (4) comprises a detection block (43) slidably connected to the detection slot (12), a detection wheel (44) rotatably connected to the detection block (43), the detection wheel (44) abutting against the chain, a detection spring (45) fixedly connected between the detection slot (12) and the detection block (43), and the detection wheel (44) abutting against the chain under the support of the detection spring (45).

5. A scraper tensioning device according to claim 4, characterized in that: The regulating device (5) comprises a support plate (52) arranged on one side of the tail housing (1), an electromagnet (54) being mounted on the support plate (52), an iron plate (55) being arranged between the electromagnet (54) and the tail housing (1), the iron plate (55) being slidably connected to the support plate (52), a connecting rod (53) being fixedly connected between the iron plate (55) and the slider (2), a wire for energizing the electromagnet (54) being arranged on the support plate (52), a switch (57) being mounted on the wire, and the regulating device (5) further comprising a control component (58) for controlling the switch (57) to be turned on.

6. A scraper tensioning device according to claim 5, characterized in that: The control assembly (58) comprises a magnetic blocking plate (581), a contact 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 foundation pit (6) is provided on the ground directly below the magnetic blocking plate (581), a limit plate (583) for supporting the magnetic blocking plate (581) is provided at the lower end of the magnetic blocking plate (581), a transmission rod (584) is fixedly connected between the limit plate (583) and the detection block (43), the magnetic blocking plate (581) is in contact with the limit plate (583), and when the magnetic blocking plate (581) is placed in the foundation pit (6), the contact block (582) is in contact with the switch (57), and the switch (57) is turned on.

7. A scraper tensioning device according to claim 6, characterized in that: Buffer plates (7) for reducing the descending speed of the magnetic blocking plate (581) are provided on both inner side walls of the foundation pit (6), and a buffer spring (71) is fixedly connected between the buffer plate (7) and the inner wall of the foundation pit (6).

8. A scraper tensioning device according to claim 5, characterized in that: A sliding rod (521) is fixedly connected to the support plate (52), a sliding hole (551) is opened on the iron plate (55), the sliding hole (551) corresponds to the sliding rod (521) one by one and the sliding rod (521) passes through the sliding hole (551), and 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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