Safety protection device for mill maintenance

Abstract

The utility model relates to the technical field of mill safety protection, and discloses a mill maintenance safety protection device which comprises a mill body, a maintenance door is installed on the lower side of the front end of the mill body, a storage barrel is fixedly connected to the middle of the right side of the front end of the maintenance door, and the storage barrel is connected with an L-shaped connecting rod through a telescopic assembly. And the bottom end of the hollow cylinder is fixedly connected to the right side of the top end of the storage cylinder, and a limiting plate is fixedly connected to the position, close to the middle of the right side of the access door, of the front end of the mill body. According to the utility model, the power supply of the whole mill main body is cut off, and even if external personnel do not know that maintenance personnel still exist in the mill main body, any electric part of the mill main body cannot be started, so that the safety of the maintenance personnel can be ensured, and the operation is carried out simultaneously with the opening of the access door; therefore, maintenance personnel can be prevented from forgetting to turn off the whole power supply of the mill main body due to negligence.

Description

Technical Field

[0001] The utility model relates to the technical field of mill safety protection, in particular to a mill maintenance safety protection device. Background Art

[0002] Mill is a commonly used equipment in cement production process. It is mainly used for grinding, grinding and pulverizing cement clinker, grinding clinker into powdery material required for cement production, improving production efficiency and product quality. It is an indispensable and important equipment in cement production.

[0003] At present, due to the inconvenience of communication between the inside and the outside world when some existing mills are undergoing maintenance and inspection, external staff may rashly start the mill without knowing the internal situation of the mill, which may easily cause casualties or gas poisoning to internal maintenance personnel. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a safety protection device for mill maintenance, which cuts off the power supply to the entire mill body. Even if outsiders are unaware that there are still maintenance personnel inside the mill body, any electrical components of the mill body cannot be started, thus ensuring the safety of the maintenance personnel.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A safety protection device for mill maintenance comprises a mill body, an inspection door is installed on the lower side of the front end of the mill body, a storage cylinder is fixedly connected to the middle of the right side of the front end of the inspection door, the storage cylinder is connected to an L-shaped connecting rod through a telescopic component, a hollow cylinder is slidably connected to the left side of the outer wall of the L-shaped connecting rod, the bottom end of the hollow cylinder is fixedly connected to the right side of the top end of the storage cylinder, and a limiting plate is fixedly connected to the middle of the right side of the inspection door near the front end of the mill body.

[0007] Furthermore, the telescopic assembly includes a plug slidably connected to the inner wall of the right end of the storage tube and an adapter block rotatably connected to the inner wall of the left side of the front end of the storage tube, the inner wall of the left end of the plug is threadedly connected to a threaded rod, the left side of the outer wall of the threaded rod is rotatably connected to the inner wall of the storage tube, and the left end of the threaded rod penetrates the inner wall of the driven bevel gear and is connected to the adapter block through a gear set.

[0008] Furthermore, the gear set includes a rotating rod fixedly connected to the rear end of the adapter block and a driven bevel gear fixedly connected to the left end of the threaded rod. The rear end of the rotating rod is fixedly connected to a driving bevel gear, and the driving bevel gear and the driven bevel gear are meshedly connected.

[0009] Furthermore, the bottom end of the L-shaped connecting rod is fixedly connected to the right side of the top end of the plug.

[0010] Furthermore, a touch pressure sensor is fixedly connected to the inner wall of the left end of the hollow cylinder.

[0011] Furthermore, a positioning hole is formed on the inner wall of the front end of the limiting plate.

[0012] Furthermore, the shape of the right end of the plug matches the shape of the inner wall of the positioning hole.

[0013] Furthermore, a hexagonal slot is provided at the front end of the adapter block.

[0014] The utility model has the following beneficial effects:

[0015] The L-shaped connecting rod is engaged with the driven bevel gear, and the threaded rod is rotated synchronously with the driven bevel gear, so that the plug slides with the L-shaped connecting rod to the inside of the hollow cylinder until the left end of the L-shaped connecting rod abuts against the touch pressure sensor. At the same time, the plug will be disengaged from the limit plate, thereby releasing the limit on the inspection door. Then, after turning one side of the inspection door to the left, the maintenance personnel can enter the interior for maintenance. At the same time, the touch pressure sensor is subjected to external pressure, which will generate an electrical signal and transmit it to the central control console. Under the operation of the coding controller on the central control console, the electric control switch corresponding to the mill body is closed, thereby cutting off the power supply to the entire mill body. Even if outsiders do not know that there are still maintenance personnel inside the mill body, any electrical components of the mill body cannot be started, which can ensure the safety of the maintenance personnel. In addition, the operation is carried out simultaneously with opening the inspection door, which can prevent the maintenance personnel from forgetting to turn off the power supply to the entire mill body by negligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a safety protection device for grinding mill maintenance proposed by the utility model;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a schematic diagram of the structure of a limit plate of a safety protection device for grinding mill maintenance proposed by the utility model;

[0019] Figure 4 This is a cross-sectional view of a storage tube of a safety protection device for grinding mill maintenance proposed by the utility model;

[0020] Figure 5 A half-section diagram of a storage cylinder of a safety protection device for grinding mill maintenance proposed by the utility model;

[0021] Figure 6 The utility model is a cross-sectional view of a hollow cylinder of a safety protection device for grinding mill maintenance.

[0022] Legend:

[0023] 1. Grinding mill body; 2. Inspection door; 3. Storage cylinder; 4. Plug; 5. Limit plate; 6. L-shaped connecting rod; 7. Touch pressure sensor; 8. Hollow cylinder; 9. Adapter block; 10. Positioning hole; 11. Driving bevel gear; 12. Rotating rod; 13. Driven bevel gear; 14. Threaded rod; 15. Hexagonal slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1-6 The utility model provides an embodiment: a safety protection device for mill maintenance, including a mill body 1, an inspection door 2 is installed on the lower side of the front end of the mill body 1, the inspection door 2 is a movable door, and its left end is installed on the mill body 1 through a hinge, a storage cylinder 3 is fixedly connected to the middle of the right side of the front end of the inspection door 2, and two cavities are provided inside the storage cylinder 3, a hollow cylinder 8 is slidably connected to the left side of the outer wall of the L-shaped connecting rod 6, and the bottom end of the hollow cylinder 8 is fixedly connected to the right side of the top of the storage cylinder 3, and a limiting plate 5 is fixedly connected to the middle of the right side of the inspection door 2 near the front end of the mill body 1.

[0026] The inner wall at the right end of the storage tube 3 is slidably connected with a plug 4 and an adapter block 9 rotatably connected to the inner wall on the left side of the front end of the storage tube 3. A hexagonal slot 15 is provided at the front end of the adapter block 9. The inner wall at the left end of the plug 4 is threadedly connected with a threaded rod 14. The outer wall of the threaded rod 14 is rotatably connected to the inner wall of the storage tube 3 on the left side. The left end of the threaded rod 14 passes through the inner wall of the driven bevel gear 13 and is connected to the adapter block 9 through a gear set. The gear set includes a rotating rod 12 fixedly connected to the rear end of the adapter block 9 and a driven bevel gear 13 fixedly connected to the left end of the threaded rod 14. The driving bevel gear 13 and the rear end of the rotating rod 12 are fixedly connected with the driving bevel gear 11. The driving bevel gear 11 and the driven bevel gear 13 are meshed. When entering the mill, the maintenance personnel need to use a hexagonal screwdriver to align the hexagonal slot 15 and then buckle it in, and then rotate the adapter block 9, so that the rotating rod 12 drives the driving bevel gear 11 to rotate. Under the transmission cooperation of the driving bevel gear 11 and the driven bevel gear 13, the threaded rod 14 rotates synchronously. The bottom end of the L-shaped connecting rod 6 is fixedly connected to the right side of the top of the plug 4, and the hollow cylinder 8 is fixedly connected to the inner wall of the left end of the touch pressure sensor 7, and the threaded rod 14 rotates, causing the plug 4 to slide into the storage tube 3 and slide with the L-shaped connecting rod 6 into the hollow tube 8 until the left end of the L-shaped connecting rod 6 abuts against the touch pressure sensor 7, and the right end of the plug 4 is disengaged from the limit plate 5, thereby releasing the limit on the inspection door 2, and then the inspection door 2 is rotated to the left to open the mill body 1 to enter the interior for maintenance. When the left end of the L-shaped connecting rod 6 abuts against the touch pressure sensor 7, the touch pressure sensor 7 is subjected to external pressure, and an electrical signal is generated at this time and transmitted to the central control console, and then under the control of the coding controller of the central control console, the electric control switch corresponding to the mill body 1 is closed, thereby cutting off the power supply of the entire mill body 1. Even if outsiders do not know that there are still maintenance personnel inside the mill body 1, any electrical component of the mill body 1 cannot be started, which can ensure the safety of the maintenance personnel, and this operation is performed simultaneously with opening the inspection door 2, which can prevent the maintenance personnel from forgetting to turn off the power supply of the entire mill body 1.

[0027] A positioning hole 10 is formed on the inner wall of the front end of the limiting plate 5, and the shape of the right end of the plug 4 matches the shape of the inner wall of the positioning hole 10. When the plug 4 is inserted into the positioning hole 10, the limiting plate 5 has a limiting effect on it, so that the inspection door 2 as a whole has a limiting effect.

[0028] Working principle: First, when entering the mill, the maintenance personnel need to use a hexagonal screwdriver to align with the hexagonal slot 15 and then snap it in, then rotate the adapter block 9, so that the rotating rod 12 drives the active bevel gear 11 to rotate, and under the transmission cooperation of the active bevel gear 11 and the driven bevel gear 13, the threaded rod 14 rotates synchronously, so that the plug 4 slides into the storage tube 3 and slides with the L-shaped connecting rod 6 into the hollow tube 8 until the left end of the L-shaped connecting rod 6 abuts against the touch pressure sensor 7, and the right end of the plug 4 is detached from the limit plate 5, thereby releasing the limit on the inspection door 2. The operator then turns the inspection door 2 to the left to open the mill body 1 and enter the interior for maintenance. While the left end of the L-shaped connecting rod 6 is in contact with the touch pressure sensor 7, the touch pressure sensor 7 is subjected to external pressure, which will generate an electrical signal and transmit it to the central console. Under the control of the coding controller of the central console, the electric control switch corresponding to the mill body 1 is closed, thereby cutting off the power supply to the entire mill body 1. Even if outsiders are unaware that there are still maintenance personnel inside the mill body 1, any electrical components of the mill body 1 cannot be started, thereby ensuring the safety of the maintenance personnel.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety protection device for grinding mill maintenance, comprising a grinding mill body (1), characterized in that: An inspection door (2) is installed at the lower side of the front end of the grinding mill body (1); a storage cylinder (3) is fixedly connected to the middle of the right side of the front end of the inspection door (2); the storage cylinder (3) is connected to an L-shaped connecting rod (6) through a telescopic component; a hollow cylinder (8) is slidably connected to the left side of the outer wall of the L-shaped connecting rod (6); the bottom end of the hollow cylinder (8) is fixedly connected to the right side of the top end of the storage cylinder (3); and a limiting plate (5) is fixedly connected to the middle of the right side of the front end of the grinding mill body (1) near the inspection door (2).

2. A safety protection device for grinding mill maintenance according to claim 1, characterized in that: The telescopic assembly comprises a plug (4) slidably connected to the inner wall of the right end of the storage tube (3) and an adapter block (9) rotatably connected to the inner wall of the left front end of the storage tube (3); a threaded rod (14) is threadedly connected to the inner wall of the left end of the plug (4); the left side of the outer wall of the threaded rod (14) is rotatably connected to the inner wall of the storage tube (3); the left end of the threaded rod (14) passes through the inner wall of the driven bevel gear (13) and is connected to the adapter block (9) through a gear set.

3. A safety protection device for grinding mill maintenance according to claim 2, characterized in that: The gear set comprises a rotating rod (12) fixedly connected to the rear end of the adapter block (9) and a driven bevel gear (13) fixedly connected to the left end of the threaded rod (14); the rear end of the rotating rod (12) is fixedly connected to a driving bevel gear (11); and the driving bevel gear (11) and the driven bevel gear (13) are meshingly connected.

4. A safety protection device for grinding mill maintenance according to claim 1, characterized in that: The bottom end of the L-shaped connecting rod (6) is fixedly connected to the right side of the top end of the plug (4).

5. The safety protection device for grinding mill maintenance according to claim 1 is characterized in that: A touch pressure sensor (7) is fixedly connected to the inner wall of the left end of the hollow cylinder (8).

6. A safety protection device for grinding mill maintenance according to claim 1, characterized in that: A positioning hole (10) is provided on the inner wall of the front end of the limiting plate (5).

7. A safety protection device for grinding mill maintenance according to claim 2, characterized in that: The shape of the right end of the plug (4) matches the shape of the inner wall of the positioning hole (10).

8. A safety protection device for grinding mill maintenance according to claim 2, characterized in that: The front end of the adapter block (9) is provided with a hexagonal slot (15).

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