A hot air inlet lockout device for a coal milling system

Abstract

The utility model discloses a hot -blast entrance locking device for coal mill system is provided with the inclined fixed frame in the inside fixed mounting of hot -blast channel, the surface fixed mounting of inclined fixed frame edge portion has sealed rubber pad, the middle part fixed mounting of hot -blast channel top is equipped with the connection box, the both ends symmetrical fixed mounting of connection box inside has fixed base, and the middle part of two fixed bases all has the rotating block that rotates through the pivot rotation connection, and the end of two rotating blocks all is fixed with hydraulic telescopic link, the utility model discloses a hydraulic telescopic link can be rotated to the operation of sealing cover plate, make it rotate around the rotating shaft, cooperate with the inclined fixed frame, to realize the closure to the hot -blast entrance, prevent the staff from being wounded when working in the coal mill, and sealed rubber pad fills sealing between the inclined fixed frame and sealing cover plate, has improved the sealing effect, prevents the hot -blast penetration of having the gap.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, specifically to a hot air inlet locking device for a coal milling system. Background Technology

[0002] During operation, the moisture generated during the heating process of a coal mill affects the viscosity of fly ash, thus impacting the mill's output efficiency. Injecting high-temperature hot air at the feed inlet accelerates heat transfer and evaporation of the coal powder, promoting rapid drying and improving output efficiency. The hot air at the mill inlet also facilitates coal powder transport; the mixture of coal powder and hot air at the feed inlet creates a pneumatic conveying effect, enhancing transport efficiency and reducing potential blockages and top-loading issues. For maintenance, the inlet hot air quick-closing valve must be shut off to ensure the safety of personnel inside the mill.

[0003] However, the operation of closing the hot air inlet is inconvenient at present, and it is not easy to directly isolate and seal the hot air. The sealing effect is poor, and hot air can easily seep in and cause physical injury to the workers inside the coal mill. Therefore, this utility model provides a hot air inlet locking device for coal milling system to meet people's needs. Utility Model Content

[0004] This utility model provides a hot air inlet locking device for a coal grinding system, which can effectively solve the problems mentioned in the background art, such as inconvenient operation when closing the hot air inlet, difficulty in directly isolating and sealing the hot air, poor sealing effect, easy hot air infiltration and flow, and physical injury to the workers inside the coal mill.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a hot air inlet locking device for a coal grinding system, comprising a hot air channel, wherein an inclined fixing frame is fixedly installed inside the hot air channel, and a sealing rubber gasket is fixedly installed on the surface of the edge of the inclined fixing frame;

[0006] A connecting box is fixedly installed at the middle of the top of the hot air duct. Fixed seats are symmetrically fixedly installed at both ends inside the connecting box. A rotating block is rotatably connected to the middle of each of the two fixed seats through a rotating shaft. A hydraulic telescopic rod is fixedly connected to the end of each of the two rotating blocks.

[0007] A rotating shaft is fixedly installed at one end of the top of the inclined fixed frame, a sealing cover is rotatably installed in the middle of the rotating shaft, and a connecting seat is symmetrically fixedly installed in the middle of one end of the sealing cover.

[0008] Preferably, the bottom ends of the two hydraulic telescopic rods are fixedly connected to connecting blocks, and the connecting blocks are movably connected to the connecting seats via rotating shafts, with the sealing cover plate tightly attached to the surface of the sealing rubber gasket.

[0009] Preferably, the bottom of the hot air channel is symmetrically provided with mounting screw holes, and mounting studs are embedded in the mounting screw holes. A positioning rod is fixedly connected to the top of the mounting studs, and a safety limit strip is installed inside the hot air channel at one side of the sealing cover plate.

[0010] Preferably, the mounting stud and the mounting screw hole are connected by threads, and the two positioning rods respectively move through both ends of the safety limit strip, with one end of the safety limit strip and one end of the bottom of the sealing cover plate fitting together.

[0011] Preferably, a fixed box is fixedly installed at one end of the surface wall of the hot air channel, a heat insulation pad is fixedly bonded inside the fixed box, a control switch is fixedly installed at the bottom inside the fixed box, a remote controller is fixedly installed inside the fixed box at one side of the control switch, sliding grooves are symmetrically opened on both sides of the fixed box, and a protective cover is installed on the surface of the fixed box.

[0012] Preferably, the protective cover has sliders symmetrically fixedly connected to its two inner walls, the sliders are movably engaged inside the slide groove, the protective cover and the fixed box are slidably connected by the sliders and the slide groove, the signal output terminal of the control switch is connected to the signal input terminal of the hydraulic telescopic rod, and the remote controller is connected to an external remote control device.

[0013] Compared with the prior art, the advantages of this utility model are: the structure of this utility model is scientific and reasonable, and it is safe and convenient to use.

[0014] 1. The device is equipped with an inclined fixing frame, a sealing rubber pad, a rotating block, a hydraulic telescopic rod, a rotating shaft, a sealing cover plate, and a connecting seat. The hydraulic telescopic rod allows the sealing cover plate to rotate around the rotating shaft, cooperating with the inclined fixing frame to seal the hot air inlet, preventing hot air from entering and injuring workers inside the coal mill. The sealing rubber pad fills and seals the space between the inclined fixing frame and the sealing cover plate, improving the sealing effect and preventing hot air penetration through gaps. The operation and control method is simple. Both the rotating block and the connecting seat provide the mobility at both ends of the hydraulic telescopic rod, allowing it to move the sealing cover plate flat against the top of the hot air channel, preventing it from obstructing the subsequent hot air transmission.

[0015] 2. It is equipped with mounting screw holes, mounting studs, positioning rods, and safety limit plates. The positioning rods securely position the safety limit plates, preventing them from being blocked on one side of the sealing cover. This improves the sealing stability of the sealing cover and prevents accidental opening of the sealing cover while the operator is still inside the coal mill, further enhancing operational safety. Simultaneously, the mounting studs and mounting screw holes work together to fix the positioning rods, making installation and disassembly extremely simple and convenient.

[0016] 3. It is equipped with a fixed box, heat insulation pad, control switch, remote controller, slide rail and protective cover. The control switch and remote controller work together to realize dual control operation on site and remotely, which plays a multiple protection role. Remote personnel can monitor and protect on site personnel, while the protective cover seals the fixed box to prevent people from accidentally touching the control switch. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the installation structure of the hydraulic telescopic rod of this utility model;

[0021] Figure 3 This is a schematic diagram of the installation structure of the positioning rod of this utility model;

[0022] Figure 4 This is a schematic diagram of the installation structure of the control switch of this utility model;

[0023] The following are the labeling elements in the diagram: 1. Hot air duct; 2. Inclined fixing frame; 3. Sealing rubber gasket; 4. Connecting box; 5. Fixing seat; 6. Rotating block; 7. Hydraulic telescopic rod; 8. Rotating shaft; 9. Sealing cover plate; 10. Connecting seat; 11. Mounting screw hole; 12. Mounting stud; 13. Positioning round rod; 14. Safety limit strip; 15. Fixing box; 16. Heat insulation pad; 17. Control switch; 18. Remote controller; 19. Slide groove; 20. Protective cover plate. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] Example: Figure 1-4 As shown, this utility model provides a technical solution, a hot air inlet locking device for a coal grinding system, including a hot air channel 1, an inclined fixing frame 2 fixedly installed inside the hot air channel 1, and a sealing rubber pad 3 fixedly installed on the surface of the side of the inclined fixing frame 2.

[0026] A connecting box 4 is fixedly installed at the middle of the top of the hot air duct 1. Fixed seats 5 are symmetrically fixedly installed at both ends inside the connecting box 4. Rotating blocks 6 are rotatably connected to the middle of the two fixed seats 5 through a rotating shaft. Hydraulic telescopic rods 7 are fixedly connected to the ends of the two rotating blocks 6.

[0027] A rotating shaft 8 is fixedly installed at one end of the top of the inclined fixed frame 2. A sealing cover 9 is rotatably installed in the middle of the rotating shaft 8. A connecting seat 10 is symmetrically fixedly installed in the middle of one end of the sealing cover 9. A connecting block is fixedly connected to the bottom of each of the two hydraulic telescopic rods 7. The connecting block and the connecting seat 10 are movably connected by a rotating shaft. The sealing cover 9 is tightly attached to the surface of the sealing rubber gasket 3. The sealing cover 9 can be rotated by the hydraulic telescopic rod 7, so that it rotates around the rotating shaft 8. It cooperates with the inclined fixed frame 2 to seal the hot air inlet and prevent hot air from entering and injuring workers inside the coal mill. The sealing rubber gasket 3 fills and seals the space between the inclined fixed frame 2 and the sealing cover 9, improving the sealing effect and preventing hot air from penetrating through gaps. The operation and control method is simple. The rotating block 6 and the connecting seat 10 can provide the mobility of both ends of the hydraulic telescopic rod 7, so that the sealing cover 9 can be moved to the top of the hot air channel 1 to prevent it from obstructing the subsequent hot air transmission.

[0028] The bottom of the hot air passage 1 is symmetrically provided with mounting screw holes 11. Mounting studs 12 are embedded in the mounting screw holes 11. The top of the mounting studs 12 is fixedly connected to positioning rods 13. A safety limit strip 14 is installed inside the hot air passage 1 on one side of the sealing cover plate 9. The mounting studs 12 and the mounting screw holes 11 are connected by threads. The two positioning rods 13 are respectively movably inserted through both ends of the safety limit strip 14. One end of the safety limit strip 14 is in contact with one end of the bottom of the sealing cover plate 9. The positioning rods 13 play a role in positioning and stabilizing the safety limit strip 14, blocking it on one side of the sealing cover plate 9, improving the sealing stability of the sealing cover plate 9, and preventing the sealing cover plate 9 from being opened by the operator while still inside the coal mill. This further improves the safety of operation. At the same time, the mounting studs 12 and the mounting screw holes 11 cooperate with each other to fix the positioning rods 13, making the installation and disassembly method extremely simple and easy to operate.

[0029] A fixed box 15 is fixedly installed at one end of the surface wall of the hot air duct 1. A heat insulation pad 16 is fixedly bonded inside the fixed box 15. A control switch 17 is fixedly installed at the bottom inside the fixed box 15. A remote controller 18 is fixedly installed inside the fixed box 15 at one side of the control switch 17. Slide grooves 19 are symmetrically opened on both sides of the fixed box 15. A protective cover plate 20 is installed on the surface of the fixed box 15. Slider blocks are symmetrically fixedly connected to the two inner walls of the protective cover plate 20. The sliders are movably engaged inside the slide grooves 19. The protective cover plate 20 and the fixed box 15 are slidably connected through the sliders and slide grooves 19. The signal output terminal of the control switch 17 is connected to the signal input terminal of the hydraulic telescopic rod 7. The remote controller 18 is connected to an external remote control device. Through the cooperation of the control switch 17 and the remote controller 18, dual control operation can be realized on-site and remote, which plays a multiple protection role. Remote personnel can monitor and protect on-site personnel. At the same time, the protective cover plate 20 closes the fixed box 15 to prevent people from accidentally touching the control switch 17.

[0030] The working principle and usage process of this utility model are as follows: First, when the staff enters the coal mill for maintenance, they push the protective cover plate 20 upward and use the control switch 17 to control the hydraulic telescopic rod 7 to extend it downward, which pushes and flips the sealing cover plate 9, causing the sealing cover plate 9 to rotate around the rotating shaft 8 and cover the surface of the inclined fixing frame 2, which is in close contact with the sealing rubber gasket 3. After cooperating with the inclined fixing frame 2, it isolates the interior of the hot air channel 1, so that the hot air no longer flows.

[0031] Then, the staff takes the positioning rod 13, aligns the mounting stud 12 at its bottom with the mounting screw hole 11, and rotates the positioning rod 13 so that the mounting stud 12 is embedded in the mounting screw hole 11. Then, the safety limit plate 14 is placed inside the hot air channel 1, and the two positioning rods 13 penetrate and position the safety limit plate 14. One end of the safety limit plate 14 contacts one end of the bottom of the sealing cover plate 9.

[0032] When workers enter the coal mill for maintenance, the protective cover 20 covers the surface of the fixed box 15 to prevent the control switch 17 from being accidentally touched. If the control system of the hydraulic telescopic rod 7 is damaged and cannot support the sealing cover 9 securely, causing it to tend to flip upwards, the safety limit strip 14 blocks it on one side, preventing the sealing cover 9 from flipping upwards and providing a certain locking function. The remote monitoring personnel can control and adjust the hydraulic telescopic rod 7 through the remote controller 18, all of which provide protection and prevent hot air from flowing inside the coal mill while the workers are still inside.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hot air inlet interlocking device for a coal pulverizing system, comprising a hot air passage (1), characterized in that: An inclined fixing frame (2) is fixedly installed inside the hot air channel (1), and a sealing rubber pad (3) is fixedly installed on the surface of the edge of the inclined fixing frame (2). A connecting box (4) is fixedly installed at the middle of the top of the hot air channel (1). Fixed seats (5) are symmetrically fixedly installed at both ends inside the connecting box (4). Rotating blocks (6) are rotatably connected to the middle of the two fixed seats (5) through a rotating shaft. Hydraulic telescopic rods (7) are fixedly connected to the ends of the two rotating blocks (6). A rotating shaft (8) is fixedly installed at one end of the top of the inclined fixed frame (2), a sealing cover plate (9) is rotatably installed in the middle of the rotating shaft (8), and a connecting seat (10) is symmetrically fixedly installed in the middle of one end of the sealing cover plate (9).

2. The hot air inlet interlocking device for a coal pulverizing system according to claim 1, characterized in that, The bottom ends of the two hydraulic telescopic rods (7) are fixedly connected to connecting blocks, and the connecting blocks are movably connected to the connecting seat (10) through a rotating shaft. The sealing cover plate (9) is tightly attached to the surface of the sealing rubber pad (3).

3. A hot air inlet interlocking device for a coal pulverizing system according to claim 1, characterized in that, The bottom of the hot air channel (1) is symmetrically provided with mounting screw holes (11), and mounting studs (12) are embedded in the mounting screw holes (11). A positioning rod (13) is fixedly connected to the top of the mounting studs (12). A safety limit strip (14) is installed inside the hot air channel (1) on one side of the sealing cover plate (9).

4. A hot air inlet interlocking device for a coal pulverizing system according to claim 3, characterized in that, The mounting stud (12) and the mounting screw hole (11) are connected by threads. The two positioning rods (13) respectively move through both ends of the safety limit strip (14). One end of the safety limit strip (14) is in contact with one end of the bottom of the sealing cover plate (9).

5. A hot air inlet interlocking device for a coal pulverizing system according to claim 1, characterized in that, A fixed box (15) is fixedly installed at one end of the surface wall of the hot air channel (1). A heat insulation pad (16) is fixedly bonded inside the fixed box (15). A control switch (17) is fixedly installed at the bottom inside the fixed box (15). A remote controller (18) is fixedly installed inside the fixed box (15) at one side of the control switch (17). Sliding grooves (19) are symmetrically opened on both sides of the fixed box (15). A protective cover plate (20) is installed on the surface of the fixed box (15).

6. A hot air inlet interlocking device for a coal pulverizing system according to claim 5, characterized in that, The protective cover (20) has sliders fixedly connected symmetrically on its two inner walls. The sliders are movably engaged inside the slide groove (19). The protective cover (20) and the fixed box (15) are slidably connected by the sliders and the slide groove (19). The signal output end of the control switch (17) is connected to the signal input end of the hydraulic telescopic rod (7). The remote controller (18) is connected to a remote control device in the outside world.

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