Coal sample air-permeable drying box

Abstract

The utility model discloses a coal sample air-permeable drying box which comprises a drying box body and a plurality of box doors connected to the front end of the drying box body, a plurality of air-permeable bins and a negative pressure bin are arranged in the drying box body, the air-permeable bins are communicated with the negative pressure bin, the negative pressure bin is connected with a fan, a plurality of air inlets are formed in the back face of the drying box body, and a plurality of air outlets are formed in the back face of the drying box body. The air inlet is connected with a conveying channel, the conveying channel is connected with a corresponding air penetration bin, a hopper is connected in the air penetration bin, the air inlet is connected with a filter screen used for filtering gas, and the filter screen is connected with a positioning mechanism used for positioning the filter screen. The filter screen can filter and purify impurities in sucked gas, pollution to a coal sample is reduced, the filter screen is convenient to disassemble and assemble, a new filter screen can be replaced or an old filter screen can be cleaned, the filtering effect is guaranteed, operation is flexible and convenient, and practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of coal sample processing technology, specifically a coal sample air-drying oven. Background Technology

[0002] Standard coal samples are standard reference materials for the analysis of the physical properties and chemical composition of coal, recognized by national specialized agencies. These coal samples are prepared with fine particles, high uniformity, good stability, and good accuracy and consistency. They are suitable for calibrating measuring instruments, evaluating analytical test methods, and determining the characteristic values ​​of coal in departments such as coal, power, metallurgy, geology, petroleum, chemical, rubber, fertilizer, environmental protection, building materials, coking, papermaking, universities, and scientific research.

[0003] During coal sample processing, drying is required. An air-permeable chamber was designed, where air is heated by a heating device and then drawn into the chamber by a fan to penetrate the coal sample for drying. However, the outside air contains impurities, and these impurities, when in contact with the coal sample, can cause contamination and affect its subsequent use. Utility Model Content

[0004] The purpose of this invention is to provide a coal sample air-drying box with a filter screen that can filter and purify impurities in the inhaled gas, thereby reducing pollution to the coal sample and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coal sample air-permeable drying chamber, comprising a drying chamber body and multiple doors connected to the front end of the drying chamber body. The drying chamber body contains multiple air-permeable chambers and a negative pressure chamber. The air-permeable chambers are connected to the negative pressure chambers, and the negative pressure chambers are connected to a fan. The back of the drying chamber body has multiple air inlets, each air inlet connected to a conveying channel. The conveying channel is connected to a corresponding air-permeable chamber. Each air-permeable chamber contains a hopper. Each air inlet is connected to a filter screen for filtering gas, and the filter screen is connected to a positioning mechanism for positioning the filter screen.

[0006] Preferably, the negative pressure chamber is provided with an air intake, and the air intake is connected to the air intake end of the fan through a pipe.

[0007] Preferably, the drying chamber is equipped with a support frame and an air collection box. The air collection box is located on the lower side of the support frame, and the fan is connected to the top of the support frame. The exhaust end of the fan is connected to the interface of the air collection box through a pipe.

[0008] Preferably, a flow equalization plate is connected inside the air-permeable chamber, the flow equalization plate is located above the hopper, and the flow equalization plate is provided with multiple through holes.

[0009] Preferably, the back of the drying chamber is connected to a plurality of limiting frames, which are used to limit the position of the filter screen.

[0010] Preferably, the positioning mechanism includes two guide posts, two springs, a U-shaped plate, two movable sleeves, two connecting seats, and multiple locking balls. The guide posts are used to guide the U-shaped plate, the springs are used to drive the U-shaped plate to move away from the drying chamber, the two ends of the U-shaped plate are connected to the movable sleeves, the movable sleeves are slidably connected to the connecting seats, the connecting seats are fixedly connected to the drying chamber, and the locking balls are disposed on the connecting seats.

[0011] Preferably, the filter screen is connected to connecting rods at both ends, the connecting rods are inserted into the connecting seat, and the outer side of the connecting rods is provided with multiple locking grooves, the locking grooves matching the locking balls.

[0012] Preferably, the end of the guide post is fixedly connected to the drying chamber, and the guide post is slidably connected to the U-shaped plate. The spring is sleeved on the guide post, and both ends of the spring are connected to the U-shaped plate and the drying chamber.

[0013] Preferably, the end of the connecting rod has a rounded corner structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, by setting a filter screen and a positioning mechanism, allows the filter screen to filter and purify impurities in the inhaled gas, reducing pollution to the coal sample. Furthermore, when assembling or disassembling the filter screen, the filter screen is connected to the limiting frame, and the filter screen is driven to move. The connecting rod is inserted into the connecting seat, and then the U-shaped plate is released. The compressed spring pushes the U-shaped plate forward, and the U-shaped plate drives the two moving sleeves to move. The moving sleeves press against the locking ball, causing the locking ball to move towards the corresponding locking groove until the inner side of the moving sleeve is connected to the locking ball. At this point, the locking ball connects with the locking groove, thus positioning the connecting rod and improving the stability of the filter screen installation. When disassembling the filter screen, it is pressed against the U-shaped plate, causing the U-shaped plate to move backward. The U-shaped plate drives the two moving sleeves to move backward synchronously until the moving sleeves separate from the locking ball, thus loosening the filter screen and facilitating disassembly. The operation is simple and convenient, allowing for the replacement of new filter screens or the cleaning of old filter screens, ensuring the filtration effect. Attached Figure Description

[0015] Figure 1 This is a frontal perspective view of the present invention;

[0016] Figure 2 This is a rear-view perspective view of the present invention;

[0017] Figure 3 This is a schematic diagram of the connection structure between the air inlet and the drying chamber of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the drying chamber of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection structure between the fan and the support frame of this utility model;

[0020] Figure 6 This is a schematic diagram of the filter screen structure of this utility model;

[0021] Figure 7 This is a schematic diagram of the connection structure between the air inlet and the filter screen of this utility model;

[0022] Figure 8 This is a schematic diagram of the connection structure between the U-shaped plate and the movable sleeve of this utility model;

[0023] Figure 9 for Figure 8 Enlarged view of point A in the middle.

[0024] In the diagram: 1. Drying chamber; 2. Chamber door; 3. Air collection box; 4. Air inlet; 5. Limiting frame; 6. Conveying channel; 7. Air suction port; 8. Rectangular opening; 9. Flow equalization plate; 10. Air permeation chamber; 11. Hopper; 12. Negative pressure chamber; 13. Fan; 14. Support frame; 15. Interface; 16. Filter screen; 17. Guide column; 18. Spring; 19. U-shaped plate; 20. Moving sleeve; 21. Connecting seat; 22. Connecting rod; 23. Locking ball; 24. Locking groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1 to 9 This utility model provides a coal sample air-drying chamber, including a drying chamber body 1 and multiple doors 2 connected to the front end of the drying chamber body 1. The two are connected by hinges for easy opening and closing of the doors 2. The drying chamber body 1 contains multiple air-permeable chambers 10 and negative pressure chambers 12. Typically, four air-permeable chambers 10 are arranged in pairs, one above the other. The air-permeable chambers 10 are connected to the negative pressure chambers 12, which are located below the air-permeable chambers 10. A fan 13 is connected to the negative pressure chamber 12. Multiple air inlets 4 are located on the back of the drying chamber body 1, with four inlets corresponding to a single air-permeable chamber 10. Each air inlet 4 is connected to a conveying channel 6, which is connected to the corresponding air-permeable chamber 10. A hopper 11 is connected inside each air-permeable chamber 10. A filter screen 16 for filtering gas is connected to each air inlet 4, and a positioning mechanism for positioning the filter screen 16 is connected to the filter screen 16.

[0027] Open the hopper door 2, place the coal sample into the hopper 11, and then close the door 2. The blower 13 draws air into the negative pressure chamber 12, and outside air is transported to the air permeation chamber 10 through the air inlet 4 and conveying channel 6, where it permeates the coal sample for drying. The filter screen 16 installed at the air inlet 4 filters and purifies the air, ensuring that the air entering the air permeation chamber 10 is relatively clean and reducing contamination of the coal sample.

[0028] The negative pressure chamber 12 is equipped with an air intake 7, which is connected to the air intake end of the fan 13 via a pipe. The drying chamber 1 is connected to a support frame 14 and an air collection box 3. The air collection box 3 is located on the lower side of the support frame 14. The fan 13 is connected to the top of the support frame 14, and the exhaust end of the fan 13 is connected to the interface 15 of the air collection box 3 via a pipe.

[0029] The air collection box 3 is a device used for centralized air supply or exhaust. Its main principle is to concentrate airflow from different directions into a single air outlet or inlet through multiple pipes to achieve the purpose of air supply and exhaust. It can reduce duct complexity and space occupation, simplify the construction process, and reduce installation costs.

[0030] An equalization plate 9 is connected inside the air-permeable chamber 10. The equalization plate 9 is located above the hopper 11 and has multiple through holes, allowing air to penetrate the coal sample evenly, resulting in more uniform sample drying. A rectangular opening 8 is provided at the end of the conveying channel 6, which connects to the air-permeable chamber 10 and is located on one side above the equalization plate 9.

[0031] Multiple limiting frames 5 are connected to the back of the drying chamber 1. The limiting frames 5 are used to limit the filter screen 16. When installing the filter screen 16, the filter screen 16 is connected to the limiting frames 5, which facilitates the docking of the connecting rod 22 and the connecting seat 21.

[0032] The positioning mechanism includes two guide posts 17, two springs 18, a U-shaped plate 19, two movable sleeves 20, two connecting seats 21, and multiple locking balls 23. The guide posts 17 are used to guide the U-shaped plate 19, and the springs 18 are used to drive the U-shaped plate 19 to move away from the drying chamber 1. The two ends of the U-shaped plate 19 are connected to the movable sleeves 20, the movable sleeves 20 are slidably connected to the connecting seats 21, the connecting seats 21 are fixedly connected to the drying chamber 1, and the locking balls 23 are disposed on the connecting seats 21. When installing the filter screen 16, insert the connecting rod 22 into the connecting seat 21, then release the U-shaped plate 19. The compressed spring 18 pushes the U-shaped plate 19 forward, and the U-shaped plate 19 drives the two moving sleeves 20 to move. The moving sleeves 20 press against the locking ball 23, causing the locking ball 23 to move towards the corresponding locking groove 24 until the inner side of the moving sleeve 20 is connected to the locking ball 23. Then the locking ball 23 is connected to the locking groove 24, thereby positioning the connecting rod 22 and improving the stability of the filter screen 16 installation.

[0033] The filter screen 16 is connected to two ends by connecting rods 22. The connecting rods 22 are inserted into the connecting seat 21. Multiple locking grooves 24 are provided on the outer side of the connecting rods 22. The locking grooves 24 match the locking balls 23. There are four locking balls 23 on a single connecting seat 21. The included angle between adjacent balls is 90°. There are also four locking grooves 24 that cooperate with them.

[0034] The end of the guide post 17 is fixedly connected to the drying chamber 1, and the guide post 17 is slidably connected to the U-shaped plate 19. The guide post 17 plays a good guiding role for the U-shaped plate 19 and improves the stability of the movement of the U-shaped plate 19. The spring 18 is sleeved on the guide post 17, and the two ends of the spring 18 are connected to the U-shaped plate 19 and the drying chamber 1.

[0035] The end of the connecting rod 22 has a rounded corner structure, which makes it easy for the connecting rod 22 to be inserted into the connecting seat 21.

[0036] Working principle: Open the chamber door 2 and place the coal sample into the hopper 11. The hopper 11 has multiple holes to facilitate air penetration. Then close the chamber door 2, and the blower 13 evacuates the negative pressure chamber 12, allowing outside air to enter the air permeation chamber 10 through the air inlet 4 and the conveying channel 6. The flow equalization plate 9 ensures that the air is evenly guided into the hopper 11, and the air permeates the coal sample for drying. The four blowers 13 collect the exhaust air in the air collection box 3 and then discharge it to the outside. The filter screen 16 installed at the air inlet 4 filters and purifies the air, ensuring that the air entering the air permeation chamber 10 is relatively clean and reducing contamination to the coal sample. When the filter screen 16 has accumulated a lot of impurities and needs to be removed, pressure is applied to the U-shaped plate 19, and the spring 18 is compressed, causing the U-shaped plate 19 to move towards the drying chamber 1. The U-shaped plate 19 drives the two movable sleeves 20 to move synchronously, separating the movable sleeves 20 from the locking ball 23, thus loosening the filter screen 16. Then, pulling the filter screen 16 makes it easier to remove. The filter screen 16 can be cleaned or replaced before installation. First, press the U-shaped plate 19, at which point the movable sleeves 20 and locking ball 23 are separated. Insert the connecting rod 22 into the connecting seat 21 until the filter screen 16 can no longer be moved. The locking groove 24 is aligned with the corresponding locking ball 23. Finally, release the U-shaped plate 19. The compressed spring 18 pushes the U-shaped plate 19 to move away from the drying chamber 1. The U-shaped plate 19 simultaneously drives the two moving sleeves 20 to move. The moving sleeves 20 press against the locking ball 23, causing the locking ball 23 to move toward the corresponding locking groove 24. When the inner side of the moving sleeve 20 is connected to the locking ball 23, the locking ball 23 is connected to the locking groove 24, thus positioning the connecting rod 22 and improving the stability of the filter screen 16 installation. The operation is simple and convenient.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal sample air-drying chamber, comprising a drying chamber body (1) and a plurality of chamber doors (2) connected to the front end of the drying chamber body (1), characterized in that, The drying chamber (1) is provided with multiple air-permeable chambers (10) and negative pressure chambers (12). The air-permeable chambers (10) are connected to the negative pressure chambers (12). The negative pressure chambers (12) are connected to a fan (13). The back of the drying chamber (1) is provided with multiple air inlets (4). The air inlets (4) are connected to a conveying channel (6). The conveying channel (6) is connected to the corresponding air-permeable chamber (10). The air-permeable chamber (10) is connected to a hopper (11). The air inlets (4) are connected to a filter screen (16) for filtering gas. The filter screen (16) is connected to a positioning mechanism for positioning the filter screen (16).

2. The coal sample air-drying oven according to claim 1, characterized in that, The negative pressure chamber (12) is equipped with an air inlet (7), and the air inlet (7) is connected to the air intake end of the fan (13) through a pipe.

3. The coal sample air-drying oven according to claim 2, characterized in that, The drying chamber (1) is connected to a support frame (14) and an air collection box (3). The air collection box (3) is located on the lower side of the support frame (14). The fan (13) is connected to the top of the support frame (14). The exhaust end of the fan (13) is connected to the interface (15) of the air collection box (3) through a pipe.

4. A coal sample air-drying oven according to claim 1, characterized in that, The air-permeable chamber (10) is connected to a flow equalization plate (9), which is located above the hopper (11) and has multiple through holes.

5. A coal sample air-drying oven according to claim 1, characterized in that, The back of the drying chamber (1) is connected to a plurality of limiting frames (5), which are used to limit the filter screen (16).

6. A coal sample air-drying oven according to claim 1, characterized in that, The positioning mechanism includes two guide posts (17), two springs (18), a U-shaped plate (19), two movable sleeves (20), two connecting seats (21), and multiple locking balls (23). The guide posts (17) are used to guide the U-shaped plate (19), and the springs (18) are used to drive the U-shaped plate (19) to move away from the drying chamber (1). The two ends of the U-shaped plate (19) are connected to the movable sleeves (20), the movable sleeves (20) are slidably connected to the connecting seats (21), the connecting seats (21) are fixedly connected to the drying chamber (1), and the locking balls (23) are disposed on the connecting seats (21).

7. A coal sample air-drying oven according to claim 6, characterized in that, The filter screen (16) is connected to two ends by connecting rods (22), which are inserted into the connecting seat (21). Multiple locking grooves (24) are provided on the outside of the connecting rods (22), and the locking grooves (24) are matched with locking balls (23).

8. A coal sample air-drying oven according to claim 6, characterized in that, The end of the guide post (17) is fixedly connected to the drying chamber (1), and the guide post (17) is slidably connected to the U-shaped plate (19). The spring (18) is sleeved on the guide post (17), and the two ends of the spring (18) are connected to the U-shaped plate (19) and the drying chamber (1).

9. A coal sample air-drying oven according to claim 7, characterized in that, The end of the connecting rod (22) has a rounded corner structure.

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