Broken pin protection mechanism of coal feeder

Abstract

The utility model discloses a coal feeder broken pin protection mechanism which comprises a conveying box, two connecting blocks and an infrared sensor, a plurality of rotating shafts are movably connected in the conveying box, a first gear is fixedly connected to the outer wall between the rotating shafts, a plurality of pins are installed between one of the two connecting blocks, and a second gear is fixedly connected to the outer wall between the two connecting blocks. The outer wall of one side of the conveying box is fixedly connected with a fixing block, the top of the fixing block is fixedly connected with a two-way electric telescopic rod, the infrared sensor is electrically connected with the two-way electric telescopic rod, and the extension end of the two-way electric telescopic rod is provided with a connecting plate. And one side of the connecting plate is fixedly connected with a clamping block. According to the device, the clamping block and the tension spring are used in cooperation, so that the pin stops running in time, follow-up workers can conveniently conduct treatment in time, and the connecting plate can stably move up and down through the positioning column.

Description

Technical Field

[0001] The utility model relates to the technical field of coal feeders, in particular to a coal feeder pin breakage protection mechanism. Background Technique

[0002] Coal feeders are applicable to the coal pulverizing systems of coal-fired boilers in thermal power plants, and can improve the performance of boilers within a large load variation range, making the control of superheat temperature, reheat temperature and pressure temperature more stable.

[0003] As disclosed in the patent of a coal feeder pin breakage protection device with the publication number of CN218269139U, in the prior art, since coal often contains large coal blocks, coal gangue and wood blocks, it is easy to break the safety pin, and the motor continues to run, resulting in the problem that the device cannot stop running in time. To solve such problems, the present application proposes a protection mechanism with a new structure. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and to propose a coal feeder pin breakage protection mechanism.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A coal feeder pin breakage protection mechanism includes a transmission box, two connecting blocks and an infrared sensor. A plurality of rotating shafts are movably connected inside the transmission box, and a first gear is fixedly connected to the outer walls between the rotating shafts. A plurality of pins are installed between one sides of the two connecting blocks, and the pins are engaged with the tooth grooves of the first gear. A fixed block is fixedly connected to one outer wall of the transmission box, and a bidirectional electric telescopic rod is fixedly connected to the top of the fixed block. The infrared sensor is electrically connected to the bidirectional electric telescopic rod. A connecting plate is installed at the extending end of the bidirectional electric telescopic rod, and a clamping block is fixedly connected to one side of the connecting plate. A dovetail groove is opened on one outer wall of the transmission box, and a support frame is movably connected inside the dovetail groove. A clamping groove is opened at the top of one side of the support frame, and the clamping block is engaged with the clamping groove. A reset component is arranged on one side of the transmission box. A motor is fixedly connected inside the support frame, and a detachable linkage component is arranged between the rotating shaft and the motor.

[0007] As a further scheme of the utility model, the reset component includes two tension springs, and the tension springs are welded to one outer wall of the support frame. A fixing plate is fixedly connected to one outer wall of the transmission box, and the two ends of the tension spring are respectively fixed to the support frame and the fixing plate.

[0008] As a further scheme of the utility model, the linkage component includes a first bevel gear, and the first bevel gear is key-connected to one end of the rotating shaft. One end of the output shaft of the motor passes through the support frame and is key-connected with a second bevel gear, and the first bevel gear is engaged with the second bevel gear.

[0009] As a further solution of the utility model, the infrared sensor is installed on the inner wall of the bottom of the transfer box.

[0010] As a further solution of the utility model, the infrared sensor is located below the pin.

[0011] As a further solution of the utility model, a positioning column is movably connected to the top of the fixed block, and the positioning column is fixed to the connecting plate.

[0012] As a further solution of the utility model, an alarm lamp is fixedly connected to the outer wall of one side of the transfer box, and the alarm lamp is electrically connected to the infrared sensor.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. Through the combined use of the clamping block and the tension spring, when the pin breaks, the rotating shaft can be stopped from rotating, so that the pin can stop running in time, which is convenient for the subsequent staff to process in time, saves time, and improves the use effect of the device.

[0015] 2. In the utility model, the support frame moves along the dovetail groove due to the rebound and contraction of the tension spring, so that the second bevel gear is automatically separated from the first bevel gear. It is not easy to have potential safety hazards without manual operation, and the safety of the device is improved.

[0016] 3. Through the setting of the positioning column, the positioning column can position the connecting plate, so that it can move up and down stably, and then the clamping block can be stably clamped into the clamping groove, improving the stability of the connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a three-dimensional structural schematic diagram of a coal feeder pin breakage protection mechanism proposed by the utility model;

[0018] Figure 2 FIG. is a partial enlarged structural schematic diagram of a coal feeder pin breakage protection mechanism proposed by the utility model;

[0019] Figure 3 FIG. is a sectional structural schematic diagram of a connecting plate of a coal feeder pin breakage protection mechanism proposed by the utility model.

[0020] In the figure: 1, pin; 2, connecting block; 3, rotating shaft; 4, transfer box; 5, first gear; 6, first bevel gear; 7, second bevel gear; 8, support frame; 9, connecting plate; 10, fixing plate; 11, tension spring; 12, dovetail groove; 13, infrared sensor; 14, clamping groove; 15, clamping block; 16, bidirectional electric telescopic rod; 17, fixed block; 18, positioning column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. For the embodiments of this application described herein, all other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts should fall within the scope of protection of this application.

[0022] Referring to Figures 1-3 , a coal feeder shear pin protection mechanism includes a transfer box 4, two connecting blocks 2 and an infrared sensor 13. A plurality of rotating shafts 3 are rotatably connected inside the transfer box 4. A first gear 5 is fixed to the outer walls between the rotating shafts 3 by bolts. A plurality of pins 1 are installed between one sides of the two connecting blocks 2, and the pins 1 are engaged with the tooth grooves of the first gear 5. When the rotating shafts 3 rotate, the first gear 5 rotates, so that the pins 1 move. A fixed block 17 is fixed to the outer wall of one side of the transfer box 4 by bolts. A bidirectional electric telescopic rod 16 is fixed to the top of the fixed block 17 by bolts, and the infrared sensor 13 is electrically connected to the bidirectional electric telescopic rod 16. A connecting plate 9 is installed at the extending end of the bidirectional electric telescopic rod 16. A clamping block 15 is fixed to one side of the connecting plate 9 by bolts. A dovetail groove 12 is formed in the outer wall of one side of the transfer box 4. A support frame 8 is slidably connected in the dovetail groove 12. A clamping groove 14 is formed at the top of one side of the support frame 8, and the clamping block 15 is engaged with the clamping groove 14. A reset assembly is provided on one side of the transfer box 4. A motor is fixed to the support frame 8 by bolts. A detachable linkage assembly is provided between the rotating shaft 3 and the motor. When the pin 1 breaks, the infrared sensor 13 senses it and starts the bidirectional electric telescopic rod 16 to extend, so that the connecting plate 9 drives the clamping block 15 to move upward out of the clamping groove 14. At this time, the support frame 8 loses its restriction, and the reset assembly pulls the support frame 8 to move along the dovetail groove 12, separating the linkage assembly, and then stopping the rotation of the rotating shaft 3, so that the pin 1 can stop running in time.

[0023] In the present utility model, it should be noted that the reset assembly includes two tension springs 11, which are welded to the outer wall of one side of the support frame 8. A fixing plate 10 is fixed to the outer wall of one side of the transfer box 4 by bolts, and the two ends of the tension spring 11 are respectively fixed to the support frame 8 and the fixing plate 10. When the block 15 moves upward out of the card slot 14, the support frame 8 loses its restriction, causing the tension spring 11 to rebound and reset. The linkage assembly includes a first bevel gear 6, which is key-connected to one end of the rotating shaft 3. One end of the motor output shaft passes through the support frame 8 and is key-connected to a second bevel gear 7, and the first bevel gear 6 meshes with the second bevel gear 7. The rebound and contraction of the tension spring 11 causes the support frame 8 to move along the dovetail groove 12, thereby separating the second bevel gear 7 from the first bevel gear 6. The infrared sensor 13 is installed on the inner wall of the bottom of the transfer box 4, and the infrared sensor 13 is located below the pin 1. A positioning column 18 is slidably connected to the top of the fixed block 17, and the positioning column 18 is fixed to the connecting plate 9. The positioning column 18 can position the connecting plate 9 so that it can move up and down stably. An alarm lamp is fixed to the outer wall of one side of the transfer box 4 by bolts, and the alarm lamp is electrically connected to the infrared sensor 13. When the infrared sensor 13 senses that the pin 1 is broken, the alarm lamp gives an alarm, thus reminding the staff to discover and handle it in time.

[0024] Working principle: When the pin 1 breaks, the infrared sensor 13 senses it and starts to extend the bidirectional electric telescopic rod 16, so that the connecting plate 9 drives the block 15 to move upward out of the card slot 14. At this time, the support frame 8 loses its restriction, and the tension spring 11 rebounds and resets, thereby pulling the support frame 8 to move along the dovetail groove 12, separating the second bevel gear 7 from the first bevel gear 6, and then stopping the rotation of the rotating shaft 3, so that the pin 1 can stop running in time.

[0025] The present utility model has been described through the above embodiments. Those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more modifications can be made according to the teachings of the present utility model. These modifications all fall within the scope of protection required by the present utility model. The scope of protection of the present utility model is defined by the appended claims and their equivalent scope.

Claims

1. A coal feeder pin break protection mechanism, comprising a conveying box (4), two connecting blocks (2) and an infrared sensor (13), wherein the conveying box (4) is internally movably connected with a plurality of rotating shafts (3), the outer wall between the rotating shafts (3) is fixedly connected with a first gear (5), a plurality of pins (1) are installed between one of the two connecting blocks (2), and the pins (1) are engaged with the tooth grooves of the first gear (5), characterized in that: A fixed block (17) is fixedly connected to an outer wall of one side of the conveying box (4), a bidirectional electric telescopic rod (16) is fixedly connected to the top of the fixed block (17), and the infrared sensor (13) is electrically connected to the bidirectional electric telescopic rod (16), a connecting plate (9) is installed at the extended end of the bidirectional electric telescopic rod (16), and a clamping block (15) is fixedly connected to one side of the connecting plate (9), a dovetail groove (12) is provided on the outer wall of one side of the conveying box (4), a support frame (8) is movably connected in the dovetail groove (12), a clamping groove (14) is provided on the top of one side of the support frame (8), and the clamping block (15) is clamped with the clamping groove (14), a reset component is provided on one side of the conveying box (4), a motor is fixedly connected in the support frame (8), and a detachable linkage component is provided between the rotating shaft (3) and the motor.

2. A coal feeder pin break protection mechanism according to claim 1, characterized in that: The reset assembly comprises two tension springs (11), which are welded to an outer wall of one side of the support frame (8). An outer wall of one side of the transfer box (4) is fixedly connected to a fixing plate (10), and two ends of the tension spring (11) are respectively fixed to the support frame (8) and the fixing plate (10).

3. A coal feeder pin breakage protection mechanism according to claim 1, characterized in that: The linkage assembly comprises a first bevel gear (6), the first bevel gear (6) is keyed to one end of the rotating shaft (3), one end of the motor output shaft passes through a support frame (8) and is keyed to a second bevel gear (7), and the first bevel gear (6) is meshed with the second bevel gear (7).

4. A coal feeder pin breakage protection mechanism according to claim 1, characterized in that: The infrared sensor (13) is installed on the bottom inner wall of the transfer box (4).

5. A coal feeder pin breakage protection mechanism according to claim 4, characterized in that: The infrared sensor (13) is located below the pin (1).

6. A coal feeder pin breakage protection mechanism according to claim 1, characterized in that: A positioning column (18) is movably connected to the top of the fixed block (17), and the positioning column (18) is fixed to the connecting plate (9).

7. A coal feeder pin breakage protection mechanism according to claim 1, characterized in that: An alarm light is fixedly connected to an outer wall of one side of the transfer box (4), and the alarm light is electrically connected to the infrared sensor (13).

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