Plough lifting signal feedback device of coal plough
By arranging material receiving plates, arc-shaped guide rods, contact switches and external feedback mechanisms inside and outside the coal bunker of the coal plow, the problem in the existing technology that the rotary blades are easily damaged, resulting in signal transmission failure, is solved, and the timely operation of the coal plow is realized. Accuracy of lift and signal feedback.
Patent Information
- Application Number
- CN202421159237.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-21
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The rotating plate of the existing rotary resistive automatic plow lift signal feedback device is easily damaged by coal blocks, resulting in the inability to send signals when coal bins are blocked, causing coal to overflow and increasing cleaning workload.
Design a plow lift signal feedback device for the coal plow, which includes installing a material receiving plate, an arc guide rod and a contact switch in the coal bunker, and setting up an external feedback mechanism on the outer wall of the coal bunker, through the "double insurance" of the proximity switch and the wire rope. Designed to achieve accurate feedback of signals.
It effectively avoids the problem of signal transmission failure when coal is blocked at the coal bunker entrance, ensures that the coal plow can be lifted in time to avoid coal spillage, reduces the cleaning workload of operators, and improves the accuracy of signal feedback.
Smart Images
Figure CN222373843U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a signal feedback device, in particular to a coal plow lifting signal feedback device. Background Art
[0002] The whole machine of the coal plow adopts a variable groove angle roller lifting structure, which can meet the requirements of the discharger under both unloading and non-unloading conditions to the maximum extent. It can not only ensure clean unloading, but also prevent the material from being scattered when the belt conveyor is running. At present, coal plows are used in coal bunkers of various thermal power plants in my country. The coal plow is responsible for distributing coal to each coal bunker. When coal is blocked at the coal bunker opening, the coal plow needs to be lifted in time to prevent further large-scale overflow of burning coal at the coal bunker opening.
[0003] In order to timely feedback the coal blockage signal at the coal bunker mouth, some coal plow design manufacturers currently use a rotary-blocking automatic plow-lifting signal feedback device. When coal is blocked at the coal bunker mouth, the device sends a signal by preventing the rotor from rotating due to coal overflow, causing the coal plow to automatically lift. However, the rotor of the rotary-blocking coal signal feedback device is easily damaged and falls off by being hit by coal blocks, making it impossible to send a signal when the coal bunker mouth is blocked, causing a large amount of coal to overflow from the coal bunker mouth, increasing the workload of operators to clean up the overflowed coal. Based on the above technical problems, the inventor proposes a coal plow-lifting signal feedback device. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a coal plow lifting signal feedback device.
[0005] The utility model is realized through the following technical scheme, and provides a coal plow lifting plow signal feedback device, including a receiving plate installed in a coal bunker for receiving coal blocks, one end of the receiving plate is hinged to the inner wall of the coal bunker, an arc-shaped guide rod is installed on the bottom surface of the receiving plate, an arc-shaped guide sleeve is installed on the inner wall of the coal bunker to cooperate with the arc-shaped guide rod and for the arc-shaped guide rod to pass through, the receiving plate swings along the hinge and drives the arc-shaped guide rod to move forward and backward along the arc-shaped guide sleeve; a limit rib is arranged at the port of the arc-shaped guide sleeve, a reset spring is sleeved on the arc-shaped guide rod, one end of the reset spring presses on the receiving plate, and the other end presses on the limit rib; a contact switch is installed at the end of the arc-shaped guide sleeve.
[0006] Preferably, a limiting mechanism for limiting the position of the butt-jointed material plates is installed on the inner wall of the coal bunker.
[0007] Preferably, the limiting mechanism comprises a support rod fixedly connected to the inner wall of the coal bunker and arranged horizontally, and a support plate fixedly arranged obliquely to the end of the support rod for supporting the receiving plate. When the swinging receiving plate contacts the support plate, it stops swinging counterclockwise.
[0008] Preferably, in order to prevent the arc-shaped guide rod from making hard contact with the contact switch and damaging the contact switch, a touch spring is installed at the end of the arc-shaped guide rod, and the contact switch is "soft-touched" by the touch spring.
[0009] Preferably, in order to improve the accuracy of signal feedback, a double insurance design is adopted and an external feedback mechanism is provided on the outer wall of the coal bunker.
[0010] Preferably, the external feedback mechanism includes an upper mounting plate and a lower mounting plate respectively fixed vertically to the outer wall of the coal bin, one end of the upper mounting plate and the lower mounting plate are connected by a linear slide rail, and the other end is connected by a vertical plate, a sliding block is installed on the linear slide rail, the lower end of the sliding block is connected to the lower mounting plate by a tension spring, and the upper end of the sliding block is connected to a steel wire rope.
[0011] Preferably, a mounting hole is opened on the coal bunker wall above the upper mounting plate, a fixed pulley is installed in the mounting hole, and the wire rope is connected to the material receiving plate after passing around the fixed pulley.
[0012] Preferably, a proximity switch that cooperates with the sliding block is installed on the vertical plate. When the receiving plate swings counterclockwise, the steel wire rope will be pulled accordingly, and the sliding block will be further lifted by the steel wire rope. After the sliding block is lifted, the proximity switch will detect the position of the sliding block and transmit the signal to the programmable logic controller equipped with the coal plow. In this process, the tension spring will be stretched. When the receiving plate gradually swings to the horizontal, the steel wire rope is gradually released, and the tension spring retracts to pull the sliding block back to its original position.
[0013] The beneficial effects of the utility model are:
[0014] The contact switch installed in the coal bunker and the proximity switch installed outside the coal bunker can jointly provide signal feedback. When the coal bunker is unloading normally, the signal triggering of the contact switch and the proximity switch is intermittent. When the signal triggering mode is always triggered or not triggered, it indicates that the coal bunker is unloading abnormally and there is coal blockage at the coal bunker opening. The contact switch and the proximity switch transmit the signal to the programmable logic controller equipped with the coal plow, and the programmable logic controller issues a command to lift the coal plow, thereby preventing the burning coal at the coal bunker opening from further overflowing in large quantities. The "double insurance" design is adopted to improve the accuracy of signal feedback. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the working state of the material receiving plate of the utility model when receiving coal;
[0016] Figure 2 This is a schematic diagram of the working state of the material receiving plate of the utility model when unloading coal;
[0017] Figure 3 yes Figure 1 A schematic diagram of the partially enlarged structure at center A;
[0018] Figure 4 yes Figure 2 A schematic diagram of the partially enlarged structure at B in the middle;
[0019] As shown in the figure:
[0020] 1. Coal bunker, 2. Receiving plate, 3. Support rod, 4. Back plate, 5. Contact switch, 6. Arc guide sleeve, 7. Touch spring, 8. Arc guide rod, 9. Return spring, 10. Fixed pulley, 11. Wire rope, 12. Limit rib, 13. Proximity switch, 14. Vertical plate, 15. Linear slide rail, 16. Sliding block, 17. Tension spring, 18. Lower mounting plate, 19. Upper mounting plate. DETAILED DESCRIPTION
[0021] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.
[0022] like Figure 1-4 As shown, the utility model includes a receiving plate 2 installed in a coal bunker 1 for receiving coal blocks, one end of the receiving plate 2 is hinged to the inner wall of the coal bunker 1, an arc guide rod 8 is installed on the bottom surface of the receiving plate 2, and an arc guide sleeve 6 is installed on the inner wall of the coal bunker 1 to cooperate with the arc guide rod 8 and for the arc guide rod 8 to pass through. The receiving plate 2 swings along the hinge and drives the arc guide rod 8 to move forward and backward along the arc guide sleeve 6. A limit rib 12 is set at the end of the arc guide sleeve 6, and a reset spring 9 is sleeved on the arc guide rod 8. One end of the reset spring 9 presses on the receiving plate 2, and the other end presses on the limit rib 12. A contact switch 5 is installed at the end of the arc guide sleeve 6, and a limit mechanism for limiting the position of the receiving plate 2 is installed on the inner wall of the coal bunker 1.
[0023] The coal blocks distributed by the coal plow fall into the coal bin 1 and are received by the receiving plate 2. As the coal blocks on the receiving plate 2 gradually increase, the weight becomes heavier. Under the action of gravity, the receiving plate 2 swings counterclockwise, the corresponding reset spring 9 is gradually compressed, and the arc guide rod 8 moves forward along the arc guide sleeve 6. When the receiving plate 2 swings to the lower limit position, it is limited by the limit mechanism. At this time, the arc guide rod 8 touches the contact switch 5, and the contact switch 5 transmits the signal to the programmable logic controller equipped with the coal plow. At the same time, when the receiving plate 2 swings to the lower limit position, the receiving plate 2 is in an inclined state, so the coal blocks on the receiving plate 2 will gradually slide down, the weight will gradually decrease, the spring will gradually relax and gradually push the receiving plate 2 to the horizontal, and the corresponding arc guide rod 8 will gradually retreat along the arc guide sleeve 6, and the arc guide rod 8 will leave the contact switch 5. The receiving plate 2 that has restored the horizontality swings counterclockwise again to unload as the weight increases during the receiving process, and the reciprocating action cycle.
[0024] In this embodiment, the limiting mechanism includes a support rod 3 fixedly connected to the inner wall of the coal bunker 1 and arranged horizontally, and a support plate 4 fixedly arranged obliquely at the end of the support rod 3 for supporting the receiving plate 2. When the swinging receiving plate 2 contacts the support plate 4, it stops swinging counterclockwise.
[0025] In this embodiment, in order to prevent the arc-shaped guide rod 8 from making hard contact with the contact switch 5 and damaging the contact switch 5 , a touch spring 7 is installed at the end of the arc-shaped guide rod 8 , and the touch spring 7 “softly touches” the contact switch 5 .
[0026] In this embodiment, in order to improve the accuracy of signal feedback, a double insurance design is adopted, and an external feedback mechanism is set on the outer wall of the coal bunker 1. The external feedback mechanism includes an upper mounting plate 19 and a lower mounting plate 18 respectively fixed vertically to the outer wall of the coal bunker 1, one end of the upper mounting plate 19 and the lower mounting plate 18 are connected by a linear slide rail 15, and the other end is connected by a vertical plate 14. A sliding block 16 is installed on the linear slide rail 15, and the lower end of the sliding block 16 is connected to the lower mounting plate 18 through a tension spring 17, and the upper end of the sliding block 16 is connected to the wire rope 11. A mounting hole is opened on the wall of the coal bunker 1 above the upper mounting plate 19, and a fixed pulley 10 is installed in the mounting hole. The wire rope 11 is connected to the receiving plate 2 after passing around the fixed pulley 10. A proximity switch 13 cooperating with the sliding block 16 is installed on the vertical plate 14. When the receiving plate 2 swings counterclockwise, the steel wire rope 11 is pulled accordingly, and the sliding block 16 is further pulled up by the steel wire rope 11. After the sliding block 16 is lifted up, the proximity switch 13 detects the position of the sliding block 16 and transmits the signal to the programmable logic controller equipped with the coal plow. In this process, the tension spring 17 is stretched. When the receiving plate 2 gradually swings to the horizontal, the steel wire rope 11 is gradually released, and the tension spring 17 retracts to pull the sliding block 16 back to its original position.
[0027] The contact switch 5 installed in the coal bunker 1 and the proximity switch 13 installed outside the coal bunker 1 of the present application can jointly provide signal feedback. When the coal bunker 1 is unloading normally, the signal triggering of the contact switch 5 and the proximity switch 13 are intermittent. When the signal triggering mode is always triggered or not triggered, it indicates that the unloading of the coal bunker 1 is abnormal and there is coal blockage at the coal bunker 1 opening. The contact switch 5 and the proximity switch 13 transmit the signal to the programmable logic controller equipped with the coal plow, and the programmable logic controller issues a command to lift the coal plow, thereby avoiding further large-scale overflow of burning coal at the coal bunker 1 opening.
[0028] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.
Claims
1. A coal plow lifting signal feedback device, characterized in that: It includes a receiving plate installed in the coal bunker for receiving coal blocks, one end of the receiving plate is hinged to the inner wall of the coal bunker, an arc-shaped guide rod is installed on the bottom surface of the receiving plate, and an arc-shaped guide sleeve is installed on the inner wall of the coal bunker to cooperate with the arc-shaped guide rod and for the arc-shaped guide rod to pass through. The receiving plate swings along the hinge and drives the arc-shaped guide rod to move forward and backward along the arc-shaped guide sleeve; a limit rib is set at the end of the arc-shaped guide sleeve, and a reset spring is sleeved on the arc-shaped guide rod, one end of the reset spring presses against the receiving plate, and the other end presses against the limit rib; a contact switch is installed at the end of the arc-shaped guide sleeve.
2. A coal plow lifting signal feedback device according to claim 1, characterized in that: A limiting mechanism for limiting the position of the butt-jointed material plates is installed on the inner wall of the coal bunker.
3. A coal plow lifting signal feedback device according to claim 2, characterized in that: The limiting mechanism comprises a support rod fixedly connected to the inner wall of the coal bunker and arranged horizontally, and a support plate fixedly and inclinedly arranged at the end of the support rod for supporting the material receiving plate.
4. A coal plow lifting signal feedback device according to claim 1, characterized in that: Install a touch spring at the end of the curved guide rod.
5. The coal plow lifting signal feedback device according to claim 1, characterized in that: An external feedback mechanism is arranged on the outer wall of the coal bunker.
6. A coal plow lifting signal feedback device according to claim 5, characterized in that: The external feedback mechanism includes an upper mounting plate and a lower mounting plate respectively fixed vertically to the outer wall of the coal bin, one end of the upper mounting plate and the lower mounting plate are connected by a linear slide rail, and the other end is connected by a vertical plate, a sliding block is installed on the linear slide rail, the lower end of the sliding block is connected to the lower mounting plate by a tension spring, and the upper end of the sliding block is connected to a steel wire rope.
7. A coal plow lifting signal feedback device according to claim 6, characterized in that: A mounting hole is opened on the coal bunker wall above the upper mounting plate, a fixed pulley is installed in the mounting hole, and the steel wire rope is connected with the material receiving plate after passing around the fixed pulley.
8. A coal plow lifting signal feedback device according to claim 7, characterized in that: A proximity switch matched with the sliding block is installed on the vertical plate.