Ventilation structure for preventing dust-containing air from flowing into ore unloading chamber

Abstract

A ventilation structure for preventing dust-containing air from flowing into an ore unloading chamber comprises the ore unloading chamber and a draw shaft which are communicated with each other, and further comprises a special air return way, a mine car and a well lid door are arranged in the ore unloading chamber, the mine car moves in the ore unloading chamber, one end of the well lid door is connected with an air cylinder, and the other end of the well lid door is connected with an air outlet. An anchor rod is connected to the air cylinder so as to be installed at the vault of the ore unloading chamber, a rotating shaft, an installation platform and a steel rail are installed at the other end of the well lid door, the steel rail is installed in the ore unloading chamber, the installation platform is welded to the surface of the steel rail, and the rotating shaft is rotationally connected to the side edge of the installation platform and connected with the well lid door. According to the mine unloading chamber, the problems that dust raised during mine unloading of a mine car in the mine unloading chamber pollutes fresh air flow in the chamber, serious influences on physical and psychological health of operators are avoided, and the use performance of instruments and equipment in the chamber is further prevented from being damaged are solved.

Description

Technical Field

[0001] The invention relates to the technical field of underground dust prevention and reduction, and in particular to a ventilation structure for preventing dust-laden wind flow from entering an ore unloading chamber. Background Art

[0002] When unloading ore from mine cars into underground unloading chambers, large amounts of dust are often generated. Due to the physical and chemical properties of dust, this dust can contaminate the fresh air flow within the chamber, severely impacting the physical and mental health of workers and affecting the performance of equipment. Therefore, it is imperative to attach great importance to the dust problem generated by unloading ore from mine cars and adopt feasible prevention and control methods to reduce dust and ultimately eliminate it.

[0003] The commonly used prevention and control methods currently available include: completely isolating the chute from the unloading site or sealing the loading and unloading door operating room, installing manhole covers or slides to separate the chute from the unloading chamber, and spraying water to remove dust. Although these methods can achieve a certain dust reduction effect, the effect is not ideal. Completely isolating the chute from the unloading site or sealing the loading and unloading door operating room is difficult to construct and not very operable; installing manhole covers or slides to separate the chute from the unloading chamber is a relatively simple method, and the unloading of ore and the frequent lifting of the manhole covers or slides are complicated to operate and the effect is not good; spraying water can easily cause ore to escape from the chute due to the large amount of water used, and it is easy to form a board for ores with high mud content and high viscosity. These methods can often only achieve one-sided effects, but fail to reduce dust from the source. Not only is the operability not strong, but the overall dust reduction effect is not ideal. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art such as unsatisfactory dust reduction effect and poor operability, and to provide a ventilation structure that prevents dust-laden airflow from entering the ore unloading chamber.

[0005] The technical solution adopted by the present invention to solve its technical problems is a ventilation structure for preventing dust-laden airflow from entering the unloading chamber, comprising an unloading chamber and a chute, and the unloading chamber and the chute are connected to each other, and also comprising a special return air lane, wherein a mine car and a manhole cover door are provided in the unloading chamber, and the mine car moves in the unloading chamber, one end of the manhole cover door is connected to a cylinder, and an anchor rod is connected to the cylinder to be installed on the arch of the unloading chamber, and a rotating shaft, a mounting platform and a rail are installed at the other end of the manhole cover door, and the rail is installed in the unloading chamber, and the mounting platform is welded to the surface of the rail, and the rotating shaft is rotatably connected to the side of the mounting platform, and the rotating shaft is connected to the manhole cover door; the special return air lane is arranged on the right side of the chute, and a fan for extracting dust-laden airflow is provided in the special return air lane.

[0006] Furthermore, an air damper and a closed wall are provided in the dedicated return air duct, the closed wall seals the dedicated return air duct, and the exhaust fan and the air damper are installed on the closed wall.

[0007] Furthermore, it also includes an inspection passage, which is connected to a dedicated return air lane. An inspection cover is provided at the connection between the inspection passage and the ore unloading chamber, and the inspection passage has steps for walking.

[0008] Furthermore, the fan is an exhaust fan.

[0009] Furthermore, when the ore unloading operation is not being carried out, the manhole cover door and the inspection cover are in a closed state, the damper in the dedicated return air lane is in an open state, and the exhaust fan is in a stopped state.

[0010] Furthermore, when unloading the ore, the manhole cover door is first opened by pushing the rotating shaft through the cylinder; the staff manually opens the maintenance cover and goes down to the dedicated return air channel through the steps, starts the exhaust fan and closes the air door at the same time.

[0011] Furthermore, a screen is provided at the exit of the chute to prevent large pieces of ore from entering the chute when the mine car is unloading. The large pieces of ore are then placed above the screen to be crushed and fall into the chute.

[0012] In summary, the present invention has the following beneficial technical effects: The present invention solves the problem of dust raised by mine cars when unloading ore in the unloading chamber polluting the fresh air flow in the chamber, thereby avoiding serious impact on the physical and mental health of the workers. By unloading the ore from the chute in the chamber, the unloaded ore enters the chute, and a special return air lane is set on the right side of the chute to suck away the dust by the exhaust fan, thereby directly avoiding the appearance of dust in the unloading chamber during unloading, and also avoiding problems such as damage to the performance of the instruments and equipment in the chamber. In addition, the setting of the manhole cover door also isolates the risk of dust backflow during unloading. This ventilation structure solves the problem of dust-laden air flow pollution during unloading operations from the source, and the construction process is simple, the equipment and facilities are easy to operate, the practicability is strong, the application is wide, and the dust reduction effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a ventilation structure for preventing dust-laden airflow from entering an ore unloading chamber according to the present invention; Figure 2 yes Figure 1 Middle AA section enlarged view; Figure 3 yes Figure 1 Enlarged cross-sectional view of the middle BB; Figure 4 yes Figure 1 Enlarged view of the CC section.

[0014] Description of reference numerals: 1. Mine car; 2. Manhole cover; 3. Rotating shaft; 4. Mounting platform; 5. Rail; 6. Screen; 7. Cylinder; 8. Anchor rod; 9. Exhaust fan; 10. Air door; 11. Enclosed wall; 12. Maintenance passage; 13. Maintenance cover; 14. Dust-laden airflow; 15. Step; 16. Dedicated return air channel. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0016] Reference Figure 1 This embodiment includes an unloading chamber, a chute, a manhole cover door 2, a dedicated return air lane 16, and an inspection passage 12. A mine car 1 is provided in the unloading chamber. At the same time, a manhole cover door 2 is provided at the connection between the unloading chamber and the chute. The dedicated return air lane 16 is provided on the right side of the chute. The opening of the inspection passage 12 is located in the unloading chamber, and the passage of the inspection passage is used to connect to the dedicated return air lane 16.

[0017] Reference Figure 1 and Figure 2 The manhole cover door 2 is equipped with a rotating shaft 3, a mounting platform 4, a steel rail 5, a cylinder 7, and an anchor rod 8. The cylinder 7 is set on the left side of the manhole cover door 2 and is installed in the vault of the ore unloading chamber through the anchor rod 8. The rotating shaft 3, the mounting platform 4, and the steel rail 5 are installed on the right side of the manhole cover door 2. The rotating shaft 3 is rotatably connected to the side of the mounting platform 4, and the mounting platform 4 is welded to the steel rail 5. Under the action of the cylinder 7 and the rotating shaft 3, the cylinder 7 can push and pull the manhole cover door 2 to open and close. At the same time, when the mine car 1 is unloading ore, the manhole cover door 2 is in the open state.

[0018] Reference Figure 1 、 Figure 2 and Figure 4 The dedicated return air duct 16 is equipped with an exhaust fan 9, an air damper 10 and a closed wall 11. The exhaust fan 9 and the air damper 10 are installed on the closed wall 11, and the closed wall 11 closes the dedicated return air duct 16, leaving only the air outlet of the air damper 10 and the exhaust fan 9.

[0019] Reference Figure 1 、 Figure 2 and Figure 3 A maintenance passage 12 is set below the unloading chamber and is connected to the dedicated return air channel 16. The maintenance passage 12 is provided with an maintenance cover 13 and a step 15. The maintenance cover 13 is located at the connection between the maintenance passage 12 and the unloading chamber, and the step 15 is provided to enable the staff to walk from the unloading chamber to the dedicated return air channel 16.

[0020] In addition, a screen 6 is provided at the opening of the chute to prevent coarse ore from entering the chute when the mine car 1 is unloading, and the manhole cover door 2 is a steel door, and the cover plate of the inspection channel 12 is assembled from wooden doors.

[0021] The implementation principle of a ventilation structure for preventing dust-laden airflow 14 from entering the ore unloading chamber according to an embodiment of the present invention is as follows: When the ore unloading operation is not in progress, the manhole cover door 2 and the cover plate of the inspection channel 12 are in a closed state, the damper 10 in the dedicated return air lane 16 is in an open state, and the exhaust fan 9 is in a stopped state.

[0022] When unloading ore, the manhole cover door 2 is first rotated into the open state by pushing the rotating shaft 3 through the cylinder 7; the staff can manually open the maintenance cover 13 and go down to the special return air channel 16 via the step 15, turn on the exhaust fan 9, and close the air door 10; at this time, the ore on the mine car 1 is unloaded from the opened manhole cover door 2 to the chute. The dust-laden airflow 14 generated in this process is sucked away from the exhaust port into the special return air channel 16 under the suction force of the exhaust fan. When the staff evacuates the special return air channel 16, they cover the cover of the maintenance passage 12 to prevent the dust-laden airflow 14 from entering the unloading chamber. The dust-laden airflow 14 generated when the mine car 1 unloads ore enters the special return air channel 16 through the exhaust fan 9 and is discharged.

[0023] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Among them, the same parts are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ventilation structure for preventing dust-laden airflow from entering an ore unloading chamber, comprising an ore unloading chamber and a chute, wherein the ore unloading chamber and the chute are interconnected, and characterized in that: The utility model also includes a special return air lane (16), wherein a mine car (1) and a manhole cover door (2) are provided in the ore unloading chamber, wherein the mine car (1) moves in the ore unloading chamber, one end of the manhole cover door (2) is connected to a cylinder (7), and an anchor rod (8) is connected to the cylinder (7) so as to be installed on the dome of the ore unloading chamber, and the other end of the manhole cover door (2) is installed with a rotating shaft (3), a mounting platform (4), and a rail (5), wherein the rail (5) is installed in the ore unloading chamber, and the mounting platform (4) is welded to the surface of the rail (5), and the rotating shaft (3) is rotatably connected to the side of the mounting platform (4), and the rotating shaft (3) is connected to the manhole cover door (2); the special return air lane (16) is provided on the right side of the chute, and a fan for extracting dust-laden airflow is provided in the special return air lane (16).

2. A ventilation structure for preventing dust-laden airflow from entering a mine unloading chamber according to claim 1, characterized in that: The dedicated return air duct (16) is further provided with an air damper (10) and a closed wall (11). The closed wall (11) seals the dedicated return air duct (16). The exhaust fan (9) and the air damper (10) are installed on the closed wall (11).

3. A ventilation structure for preventing dust-laden airflow from entering a mine unloading chamber according to claim 1, characterized in that: The utility model also includes an inspection passage (12), wherein the inspection passage (12) is connected to a dedicated return air lane (16), an inspection cover plate (13) is provided at the connection between the inspection passage (12) and the ore unloading chamber, and the inspection passage (12) has steps (15) for walking.

4. A ventilation structure for preventing dust-laden airflow from entering a mine unloading chamber according to claim 1, characterized in that: The fan is an exhaust-type fan (9).

5. A ventilation structure for preventing dust-laden airflow from entering a mine unloading chamber according to claim 1, characterized in that: When the ore unloading operation is not being carried out, the manhole cover door (2) and the inspection cover plate (13) are in a closed state, the air damper (10) in the dedicated return air lane (16) is in an open state, and the exhaust fan (9) is in a stopped state.

6. A ventilation structure for preventing dust-laden airflow from entering a mine unloading chamber according to claim 1, characterized in that: When unloading ore, the manhole cover door (2) is first pushed by the cylinder (7) to rotate the shaft (3) to open the manhole cover door (2); the staff manually opens the inspection cover (13) and goes down to the dedicated return air lane (16) via the step (15), starts the exhaust fan (9) and closes the air door (10) at the same time.

7. A ventilation structure for preventing dust-laden airflow from entering a mine unloading chamber according to claim 1, characterized in that: A grid screen (6) is provided at the outlet of the chute to prevent large pieces of ore from entering the chute when the mine car (1) is unloading the ore.

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