Mine dust work environment exposure simulation bin

Abstract

The utility model discloses a mine dust operation environment exposure simulation bin, concretely relates to simulation bin technical field, including rotating table, the inside of rotating table is provided with the mounting slot, the outside of rotating table is provided with the gear ring, the upper end part of gear ring is provided with the partition board, the front and back end part of partition board all is installed with the support pipe, the outside of support pipe is slidably connected with the mobile pipe for the auxiliary positioning face shield, the installation frame for setting up face shield is arranged between two mobile pipes, and the installation pipe for gas circulation simulation inhalation is installed to the outside of installation frame. The utility model discloses through installation frame and installation pipe to set up face shield and cooperate support pipe and mobile pipe and position face shield, and utilize first pump machine main body and cooperate installation frame and carry out the suction work, simulate face shield working environment, and utilize filter main part and storage tank and block, collect mine dust, and simultaneously, partition board and mounting slot divide rotating table into pipeline installation area and two symmetrical simulation bins, to facilitate simulation mine dust environment or check dust mask check.

Description

Technical Field

[0001] This utility model relates to the field of simulation chamber technology, and more specifically, to a simulation chamber for exposure to mining dust working environments. Background Technology

[0002] Mining dust work environment refers to the environment in which a large amount of dust is generated during mining operations due to various work activities. This dust not only pollutes the environment but may also have a serious impact on the health of workers. Mining dust mainly comes from processes such as ore crushing, screening, and transportation. The dust generated in these processes can be divided into dry dust and wet dust. Dry dust is usually spread through the air, while wet dust is more likely to settle. In mining work environments, various equipment is needed to protect workers, the most common of which are various dust masks. Before use, dust masks need to be checked and tested. The working environment can be simulated using a mining dust work environment exposure simulation chamber to test the performance of dust masks.

[0003] Most existing mine dust exposure simulation chambers are set up as single fixed chambers. During use, they often require a long downtime to wait for the mine dust to settle or be pumped out. The testing time is often long, and multiple batches of different masks are tested. The single chamber can easily prolong the downtime of the testing work, which reduces the overall testing efficiency of the masks and thus reduces the utilization efficiency of the mine dust exposure simulation chamber.

[0004] In summary, in order to assist in the testing of dust masks in the simulation chamber for exposure to dusty working environments in mines, it is necessary to solve the problem that a single simulation chamber reduces the overall work efficiency, so that the simulation chamber for exposure to dusty working environments in mines can continuously simulate the dusty environment and perform dust mask testing while simulating the test. Utility Model Content

[0005] The problem that this utility model provides for the mining dust exposure simulation chamber is that most existing mining dust exposure simulation chambers are set up with a single fixed chamber. During use, they often require a long downtime to wait for the mining dust to settle or be sucked out. The detection time is often long, and multiple batches of different masks are tested. The single chamber can easily prolong the downtime of the detection work, which reduces the overall detection efficiency of the masks and thus reduces the utilization efficiency of the mining dust exposure simulation chamber.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a simulated exposure chamber for mining dust operation environment, including a rotating table, an installation groove on the inner side of the rotating table, a toothed ring on the outer side of the rotating table, a partition plate on the upper end of the toothed ring, support pipes installed at the front and rear ends of the partition plate, a movable pipe for assisting in positioning a face mask slidably connected to the outer side of the support pipe, a mounting frame for placing the face mask between the two movable pipes, and a mounting pipe for simulating air intake for gas flow installed on the outer side of the mounting frame.

[0007] In a preferred embodiment, a filter body is installed at the lower end of the installation pipe, a first pump body is provided at the lower end of the filter body, and a storage tank is provided at the lower end of the first pump body.

[0008] In a preferred embodiment, a support frame is provided on the outside of the storage tank, and a first hydraulic push rod is installed on the upper end of the rotating platform. A baffle plate is fixedly connected to the output end of the first hydraulic push rod. The first hydraulic push rod is used to drive the baffle plate to move along a predetermined path, and the baffle plate is slidably connected to the rotating platform.

[0009] In a preferred embodiment, a first support platform is installed at the upper end of the support frame, the first support platform is rotatably connected to the rotating platform, and a second support platform is provided on the outer side of the first support platform.

[0010] In a preferred embodiment, a rotating baffle is rotatably connected to the rear end of the second support platform. Both sides of the rotating baffle are provided with mounting holes. A power motor is provided at the rear end of the support frame. A gear is fixedly connected to the output end of the power motor. The gear meshes with a gear ring, and the power motor is used to drive the gear to rotate.

[0011] In a preferred embodiment, a second hydraulic push rod is provided at the lower end of the mounting port, and a movable frame is fixedly connected to the output end of the second hydraulic push rod. The second hydraulic push rod is used to drive the movable frame to move along a predetermined path, and a blocking frame is installed on the outside of the movable frame.

[0012] In a preferred embodiment, a grid frame is installed inside the mounting port, and a second pump body is provided at the lower end of the grid frame.

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

[0014] This invention uses a mounting frame and mounting pipe to place the mask and simulate breathing conditions. A support pipe and a moving pipe are used to cooperate with the mounting frame to position the mask. The main body of the first pump works with the mounting frame to perform suction, simulating the working environment of the mask. The filter body and storage tank are used to block and collect mineral dust, which is convenient for cleaning and mask performance evaluation. At the same time, the rotating table is divided into a pipe installation area and two symmetrical simulation chambers by a partition plate and a mounting groove, which improves the overall work efficiency and facilitates the separate simulation of mineral dust environment or the inspection of dustproof masks.

[0015] This invention facilitates the opening and closing of the second support platform by setting a rotating baffle in conjunction with a grid frame, providing a simulated environment for mineral dust. The first hydraulic push rod drives the baffle plate, which in turn works with the rotating platform to close or open the simulation chamber, facilitating simulation testing and detection. The rotating platform is driven to rotate by a power motor and gears in conjunction with a gear ring, and the dust falling area is defined by a moving frame and a baffle frame. The second hydraulic push rod drives the moving frame and the baffle frame to move, thereby moving the mineral dust and facilitating initial cleaning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the rotating platform structure of this utility model. Figure 1 .

[0018] Figure 3 This is a schematic diagram of the rotating platform structure of this utility model. Figure 2 .

[0019] Figure 4 This is a schematic diagram of the first support platform structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the second support platform structure of this utility model.

[0021] The attached figures are labeled as follows: 1. Rotating platform; 2. Mounting groove; 3. Gear ring; 4. Divider plate; 5. Support pipe; 6. Moving pipe; 7. Mounting frame; 8. Mounting pipe; 9. Filter body; 10. First pump body; 11. Storage tank; 12. Support frame; 13. First hydraulic push rod; 14. Baffle plate; 15. First support platform; 16. Second support platform; 17. Rotating baffle; 18. Mounting port; 19. Power motor; 20. Gear; 21. Second hydraulic push rod; 22. Moving frame; 23. Baffle frame; 24. Grid frame; 25. Second pump body. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Implementable methods already discovered in this field:

[0024] Mining dust environments refer to workplaces where the air contains a large amount of mineral particles during mining, crushing, and transportation processes. This dust poses a serious threat to the health and safety of workers.

[0025] I. Main hazards

[0026] The hazards of mineral dust are mainly manifested in two aspects: health hazards and safety hazards.

[0027] 1. Health hazards (occupational diseases)

[0028] This is the most widespread and long-term hazard. Pneumoconiosis (the most well-known and serious occupational disease. Dust, after being inhaled, deposits in the alveoli, causing pulmonary fibrosis and leading to irreversible loss of lung function); silicosis (caused by inhaling dust containing free silica; quartz dust is commonly found in the rock strata of metal mines and coal mines, and is the most harmful, progressing rapidly and easily leading to complications such as tuberculosis); coal worker's pneumoconiosis (mainly caused by inhaling coal dust, commonly found in coal mines); asbestosis (caused by asbestos dust, which can lead to lung cancer and mesothelioma); other respiratory diseases (chronic bronchitis, emphysema, asthma, etc.); cancer (long-term inhalation of asbestos, dust containing arsenic, chromium, and nickel increases the risk of lung cancer); other systemic damage (dust can enter the circulatory system, increasing the risk of cardiovascular and cerebrovascular diseases; irritating the eyes and skin, causing inflammation).

[0029] 2. Safety Hazards (Accident Risks) Dust Explosion: Combustible dust of a certain concentration (such as coal dust, sulfur dust, aluminum powder, etc.) will explode violently when it encounters an ignition source (electric spark, friction spark, open flame) in a confined space. The explosion is extremely powerful and poses a significant safety risk to coal mines and certain metal mines. High concentrations of dust can severely reduce visibility in the workplace, easily leading to accidents such as mechanical malfunctions, vehicle collisions, and tripping incidents.

[0030] II. Main Generation Stages

[0031] Dust is generated in almost every stage of mining production.

[0032] Drilling (during operation of rock drills, down-the-hole drills, etc.); blasting (the instantaneous generation of large amounts of dust when explosives break rocks); crushing and pulverizing (when processing ore using jaw crushers, cone crushers, etc.); loading and transportation (loading with loaders, transporting ore in mine cars, and transferring ore via belt conveyors); stockpiling and storage (dust generated by wind in ore stockpiles).

[0033] Implementable methods already discovered in this field:

[0034] Using a mining dust exposure simulation chamber to simulate the mining environment allows for convenient testing of the performance of workers' personal protective equipment and helps users assess the safety of the environment.

[0035] A complete mineral dust exposure simulation chamber typically consists of the following subsystems:

[0036] 1. Main compartment

[0037] Structure: Usually made of stainless steel or glass to ensure good airtightness, corrosion resistance and easy cleaning.

[0038] Size: Varies, from small (only able to accommodate laboratory animals or part of the equipment) to large (able to accommodate the entire human body or large machinery).

[0039] Safety features include: observation window, sealed door, negative pressure system (ensuring dust does not leak into the laboratory environment), emergency cleaning and pressure relief devices.

[0040] 2. Dust generation and aerosol formation system

[0041] This is the core of the system. Its purpose is to stably and uniformly disperse dry raw mineral powder (such as standard quartz dust, specific coal mine dust, etc.) into the air inside the chamber, forming an aerosol that conforms to real-world conditions.

[0042] Key equipment: dust feeder, venturi jet injector, or dust generator based on fluidized bed principle. Precise control of the dust conveying rate is required.

[0043] 3. Aerodynamic grading system

[0044] The most harmful type of real mineral dust to the human body is inhalable dust, especially respirable dust that can enter the alveoli (usually referring to particles with an aerodynamic diameter of less than 7.07 micrometers).

[0045] Key equipment: Cyclone classifiers or virtual impactors. These utilize aerodynamic principles to filter out large particles, allowing only dust particles within the target particle size range (such as PM2.5, PM10, or respirable dust) to enter the main chamber, thereby accurately simulating a high-risk dust environment.

[0046] 4. Environmental monitoring and control system

[0047] Dust concentration monitoring: Real-time laser dust meter or photometer to continuously monitor the dust mass concentration in the chamber (unit: mg / m³). 3 ).

[0048] Particle size distribution monitoring: Use a cascade impactor or online particle size analyzer to periodically sample and analyze the particle size distribution of dust to ensure that it meets the simulation requirements.

[0049] Environmental parameter control: Temperature and humidity sensors and control systems maintain a stable environment inside the chamber, as temperature and humidity affect the suspension and agglomeration characteristics of dust.

[0050] Airflow control: Fans and deflectors ensure uniform dust distribution within the cabin, eliminating blind spots.

[0051] 5. Exhaust gas treatment and filtration system

[0052] After the experiment, the air containing high concentrations of dust inside the chamber cannot be directly discharged.

[0053] Key equipment: High-efficiency particulate air (HEPA) filters or higher-level ULPA filters, sometimes used in series with multiple filtration stages (such as pre-filter, medium-efficiency filter, and HEPA filter) to ensure clean exhaust air and protect the environment and personnel safety.

[0054] 6. Experimental Subject Placement and Exposure System

[0055] For animal experiments: There are special designs that expose the animal's head or whole body to a dusty environment while ensuring the animal's normal breathing and physiological activities.

[0056] For human testing: Large chambers may allow test personnel to enter, wear different protective equipment (such as masks), and test their protective effectiveness.

[0057] For material / equipment testing: Place the filter material, sensor or mechanical device to be tested inside the chamber and evaluate its performance in a high-dust environment.

[0058] Refer to the instruction manual appendix Figures 1 to 5 The simulation chamber for exposure to mining dust includes a rotating table 1. The inner side of the rotating table 1 is provided with an installation groove 2. The outer side of the rotating table 1 is provided with a toothed ring 3. The upper end of the toothed ring 3 is provided with a partition plate 4. Support pipes 5 are installed at the front and rear ends of the partition plate 4. A movable pipe 6 for assisting in positioning a face mask is slidably connected to the outer side of the support pipe 5. A mounting frame 7 for placing the face mask is provided between the two movable pipes 6. An installation pipe 8 for simulating air intake for gas flow is installed on the outer side of the mounting frame 7.

[0059] It should be noted that the rotating table 1 is divided into a pipe installation area and two symmetrical simulation chambers by the partition plate 4 and the mounting groove 2. The mask is placed and breathing is simulated by the mounting frame 7 and the mounting pipe 8, and the mask is positioned by the support pipe 5 and the moving pipe 6 in conjunction with the mounting frame 7.

[0060] It is worth noting that the surface of the mounting bracket 7 has holes for gas flow, which facilitates the simulation of inhalation and further simulates the working environment of the mask. At the same time, the support tube 5 is hollow, and a spring is provided between the moving tube 6 and the support tube 5 to support the pop-out of the moving tube 6, which facilitates the positioning of the mask.

[0061] Refer to the instruction manual appendix Figures 2 to 3 A filter body 9 is installed at the lower end of the installation pipe 8, a first pump body 10 is installed at the lower end of the filter body 9, and a storage tank 11 is installed at the lower end of the first pump body 10.

[0062] It should be noted that the first pump body 10 works in conjunction with the mounting frame 7 to perform suction, simulating the working environment of the mask, and the filter body 9 and storage tank 11 block and collect mineral dust.

[0063] Refer to the instruction manual appendix Figures 2 to 3 A support frame 12 is provided on the outside of the storage tank 11. A first hydraulic push rod 13 is installed on the upper end of the rotating table 1. A baffle plate 14 is fixedly connected to the output end of the first hydraulic push rod 13. The first hydraulic push rod 13 is used to drive the baffle plate 14 to move along a predetermined path. The baffle plate 14 is slidably connected to the rotating table 1.

[0064] It should be noted that the first hydraulic push rod 13 drives the blocking plate 14, which in turn works with the rotating table 1 to close or open the simulation chamber respectively.

[0065] Refer to the instruction manual appendix Figures 4 to 5 The upper end of the support frame 12 is equipped with a first support platform 15, which is rotatably connected to the rotating platform 1. A second support platform 16 is provided on the outer side of the first support platform 15.

[0066] It should be noted that the first support platform 15 is used to assist in supporting and limiting the rotating platform 1, so that the rotating platform 1 can rotate normally.

[0067] Refer to the instruction manual appendix Figures 4 to 5 The rear end of the second support platform 16 is rotatably connected to a rotating baffle 17. Both sides of the rotating baffle 17 are provided with mounting holes 18. The rear end of the support frame 12 is provided with a power motor 19. A gear 20 is fixedly connected to the output end of the power motor 19. The gear 20 meshes with the gear ring 3. The power motor 19 is used to drive the gear 20 to rotate.

[0068] It should be noted that rotating the baffle 17 facilitates the opening and closing of the second support platform 16 as a whole, providing a simulated environment of mineral dust, and the power motor 19 drives the gear 20 to rotate, thereby cooperating with the gear ring 3 to drive the rotating platform 1 to rotate.

[0069] Refer to the instruction manual appendix Figures 4 to 5 A second hydraulic push rod 21 is provided at the lower end of the mounting port 18. A movable frame 22 is fixedly connected to the output end of the second hydraulic push rod 21. The second hydraulic push rod 21 is used to drive the movable frame 22 to move along a predetermined path. A blocking frame 23 is installed on the outside of the movable frame 22.

[0070] It should be noted that the dust falling area is defined by the movable frame 22 and the blocking frame 23, and the two second hydraulic push rods 21 are synchronously controlled by the PLC controller to move the movable frame 22 and the blocking frame 23, thereby moving the mineral dust and facilitating initial cleaning.

[0071] Refer to the instruction manual appendix Figures 4 to 5 A grid frame 24 is installed on the inner side of the mounting port 18, and a second pump body 25 is provided at the lower end of the grid frame 24.

[0072] It should be noted that the grid frame 24 and the second pump body 25 are installed through the installation port 18, thereby supplying air to the inside of the second support platform 16 to simulate the working environment of mineral dust.

[0073] It is worth noting that the grid frame 24 and the second pump body 25 are used to assist in supplying and dispersing the mineral dust, so that the dust inside the second support platform 16 can be dispersed. At the same time, the baffle plate 14 and the rotating baffle plate 17 are both made of transparent material, so the working condition of the mask can be observed normally. Furthermore, there are two sets of the first hydraulic push rod 13 and the baffle plate 14 that do not interfere with each other, which makes it convenient for users to observe the mask in the simulation chamber or to clean the simulation chamber and replace the test mask.

[0074] Working principle: First, the mask is placed through the mounting frame 7 and the mounting pipe 8, and the support pipe 5 and the moving pipe 6 are used to position the mask in conjunction with the mounting frame 7. Next, the first hydraulic push rod 13 is activated to drive the baffle plate 14, which in turn works with the rotating table 1 to close the simulation chamber. Then, the power motor 19 and the gear 20 work together with the gear ring 3 to drive the rotating table 1 to rotate. Finally, the grid frame 24 and the second pump body 25 are installed through the mounting port 18, thereby supplying air to the inside of the second support platform 16 to simulate the working environment of mineral dust.

[0075] In use, firstly, the first pump body 10, in conjunction with the mounting frame 7, performs suction and simulates breathing. Next, the filter body 9 and storage tank 11 block and collect mineral dust, facilitating cleaning and mask performance assessment. Then, by rotating the baffle 17 in conjunction with the grid frame 24, the second support platform 16 can be opened and closed as a whole, providing a simulated environment for mineral dust. Finally, the moving frame 22 and the blocking frame 23 define the dust falling area, and the second hydraulic push rod 21 drives the moving frame 22 and the blocking frame 23 to move, thereby moving the mineral dust for initial cleaning.

[0076] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A simulation chamber for exposure to mining dust, characterized in that: The device includes a rotating platform (1), with an installation groove (2) on the inner side of the rotating platform (1), a toothed ring (3) on the outer side of the rotating platform (1), a partition plate (4) on the upper end of the toothed ring (3), a support tube (5) installed at both the front and rear ends of the partition plate (4), a movable tube (6) for assisting in positioning the mask slidably connected to the outer side of the support tube (5), a mounting frame (7) for placing the mask is provided between the two movable tubes (6), and a mounting tube (8) for simulating gas flow and inhalation is installed on the outer side of the mounting frame (7).

2. The mining dust work environment exposure simulation chamber according to claim 1, characterized in that: A filter body (9) is installed at the lower end of the installation pipe (8), a first pump body (10) is provided at the lower end of the filter body (9), and a storage tank (11) is provided at the lower end of the first pump body (10).

3. The mining dust work environment exposure simulation chamber according to claim 2, characterized in that: A support frame (12) is provided on the outside of the storage tank (11). A first hydraulic push rod (13) is installed on the upper end of the rotating table (1). A baffle plate (14) is fixedly connected to the output end of the first hydraulic push rod (13). The first hydraulic push rod (13) is used to drive the baffle plate (14) to move along a predetermined path. The baffle plate (14) is slidably connected to the rotating table (1).

4. The mining dust work environment exposure simulation chamber according to claim 3, characterized in that: A first support platform (15) is installed at the upper end of the support frame (12). The first support platform (15) is rotatably connected to the rotating platform (1). A second support platform (16) is provided on the outside of the first support platform (15).

5. The mining dust work environment exposure simulation chamber according to claim 4, characterized in that: The rear end of the second support platform (16) is rotatably connected to a rotating baffle (17). Both sides of the rotating baffle (17) are provided with mounting holes (18). The rear end of the support frame (12) is provided with a power motor (19). A gear (20) is fixedly connected to the output end of the power motor (19). The gear (20) meshes with the gear ring (3). The power motor (19) is used to drive the gear (20) to rotate.

6. The mining dust work environment exposure simulation chamber according to claim 5, characterized in that: A second hydraulic push rod (21) is provided at the lower end of the mounting port (18). A movable frame (22) is fixedly connected to the output end of the second hydraulic push rod (21). The second hydraulic push rod (21) is used to drive the movable frame (22) to move along a predetermined path. A blocking frame (23) is installed on the outside of the movable frame (22).

7. The mining dust work environment exposure simulation chamber according to claim 6, characterized in that: A grid frame (24) is installed on the inside of the mounting port (18), and a second pump body (25) is provided at the lower end of the grid frame (24).

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