Gas filtering device of flammability testing machine

Abstract

A gas filtering device of a flammability testing machine comprises a lower protective shell, an upper protective shell, an upper fastening screw, a lower fastening nut, a filtering bearing pipe, a protective shell mounting screw, a power mechanism bearing ring, a driven gear ring, a filtering block mounting cylinder, a filtering block, a driving motor and a driving gear, and a to-be-filtered gas inflow pipe is arranged at the bottom of the filtering bearing pipe; anti-rotation positioning grooves are formed in the two sides of the filter bearing pipe, the power mechanism bearing ring is fixed to the outer side of the filter bearing pipe in a sleeving mode, a motor mounting table is arranged on the inner side of the power mechanism bearing ring, the motor mounting table is matched with the anti-rotation positioning grooves, the motor mounting table is connected with the anti-rotation positioning grooves, and the motor mounting table is inserted into the anti-rotation positioning grooves. The top of the motor mounting table is fixedly connected with a driving motor, and a driving gear is arranged in the motor mounting table and rotationally connected with the motor mounting table.

Description

Technical Field

[0001] The utility model relates to the field of flammability testing machines, and particularly relates to a gas filtering device for a flammability testing machine. Background Art

[0002] The existing patent (publication number: CN214747232U) proposes a gas filtering device for a flammability testing machine, including a test furnace body. A control device main body is fixedly connected to the left side of the test furnace body. Instruction control buttons are arranged in front of the control device main body. A test chamber body is arranged on the right side of the control device main body. A material fixing device is arranged inside the test chamber body. Clamping frames are arranged on both sides of the material fixing device. Fixed clamping strips are arranged on both sides of the clamping frames. The number of the fixed clamping strips is set to four. However, for the device with "a blower is arranged inside the filtering device, and a filtering layer is arranged above the blower", the gas to be filtered will pass through the blower during the flowing process, and impurities such as oil and gas inside the gas to be filtered will affect the service life of the blower and increase the maintenance frequency of the staff. Summary of the Invention

[0003] In view of the above deficiencies in the prior art, the utility model provides a gas filtering device for a flammability testing machine. A high-speed flowing gas reduces the air pressure inside the outer gas discharge pipe. The pressure difference between the inside of the gas inlet pipe for the gas to be filtered and the inside of the outer gas discharge pipe causes the gas to be filtered inside the gas inlet pipe for the gas to be filtered to flow through the filter block and into the outer gas discharge pipe, completing the gas filtering operation. During the filtering process, the gas does not pass through mechanisms such as a driven gear ring, a driving gear, and a driving motor, making the power mechanism of this device less likely to be polluted by the gas to be filtered, enabling this device to not need to be maintained frequently, and at the same time extending the service life of this device.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A gas filtering device for a flammability testing machine includes a lower protective shell, an upper protective shell, upper fastening screws, lower fastening nuts, a filter bearing pipe, protective shell mounting screws, a power mechanism bearing ring, a driven gear ring, a filter block mounting cylinder, filter blocks, a driving motor, and a driving gear. The bottom of the filter bearing pipe has a gas inlet pipe for the gas to be filtered. Anti-rotation positioning grooves are arranged on both sides of the filter bearing pipe. The power mechanism bearing ring is sleeved outside the filter bearing pipe and fixed. The inner side of the power mechanism bearing ring has a motor mounting platform. The motor mounting platform is adapted to the anti-rotation positioning grooves, the motor mounting platform is connected to the anti-rotation positioning grooves, the motor mounting platform is inserted into the anti-rotation positioning grooves, a driving motor is fixedly connected to the top of the motor mounting platform, a driving gear is arranged inside the motor mounting platform, the driving gear is rotatably connected to the motor mounting platform, a transmission shaft of the driving motor is fixedly connected to the driving gear, and a gear ring mounting platform is arranged inside the power mechanism bearing ring.

[0006] The driven gear ring is rotatably connected to the gear ring mounting platform, the driving gear is meshed with the driven gear ring, a fan blade is provided on the outside of the driven gear ring, a lower hollow support plate is provided on the bottom of the lower protective shell, a shell mounting ring is provided on the bottom of the lower hollow support plate, the shell mounting ring is sleeved on the outside of the filter bearing tube, the shell mounting ring is located at the lower part of the power mechanism bearing ring, a side surface of the shell mounting ring is provided with a side screw mounting platform, the side screw mounting platform is threadedly connected to the protective shell mounting screw, and the protective shell mounting screw is pressed against the side surface of the filter bearing tube.

[0007] The filter block mounting cylinder has a handle on the top, the filter block mounting cylinder is adapted to the filter supporting tube, the filter block mounting cylinder is connected to the filter supporting tube, the filter block mounting cylinder is inserted into the filter supporting tube, the filter block is adapted to the filter block mounting cylinder, the filter block is connected to the filter block mounting cylinder, the filter block is inserted into the filter block mounting cylinder, and the top of the upper protective shell is provided with an external gas exhaust pipe.

[0008] Beneficial effects: 1. When the utility model filters the gas of the flammability testing machine, the driven gear ring arranged on the outside of the filter supporting tube pushes the outside gas to flow at high speed through the gap between the upper protective shell and the inner gas exhaust pipe to enter the outside gas exhaust pipe. The high-speed flowing gas reduces the air pressure inside the outer gas exhaust pipe. The pressure difference between the inside of the gas inflow tube to be filtered and the inside of the outer gas exhaust pipe causes the gas to be filtered inside the gas inflow tube to flow through the filter block to the outer gas exhaust pipe, thereby completing the gas filtering operation. During the filtering process, the gas does not pass through the driven gear ring, the driving gear, the driving motor and other mechanisms, so that the power mechanism of this device is less susceptible to contamination by the gas to be filtered, so that this device does not need frequent maintenance, and at the same time extends the service life of this device.

[0009] 2. The upper protective shell and the inner gas discharge pipe of the utility model are designed to narrow upwards, so that the cross-sectional area of ​​the pipe is reduced when the external gas flows from the lower protective shell to the outer gas discharge pipe, thereby increasing the gas flow rate and further reducing the gas pressure inside the outer gas discharge pipe, thereby increasing the filtering efficiency of the device.

[0010] 3. The lower protective shell, upper protective shell, internal gas exhaust pipe and filter support pipe of the utility model adopt a split design, so that the operator can easily remove the upper protective shell by dismantling the upper fastening screws and the lower fastening nuts, exposing the internal space of the lower protective shell and the internal space of the filter support pipe to the outside, making it convenient for the operator to maintain and replace the device.

[0011] 4. The top of the filter block installation cylinder of the utility model is provided with a handle, so that the operator can more conveniently take out the filter block when replacing the filter block, thereby increasing the convenience of the filter block replacement operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1Schematic structural diagram of a gas filtering device for a flammability testing machine according to the present utility model.

[0013] Figure 2 Bottom view structural diagram of a gas filtering device for a flammability testing machine according to the present utility model.

[0014] Figure 3 Internal structure diagram of a gas filtering device for a flammability testing machine according to the present utility model.

[0015] Figure 4 Side view cross-sectional diagram of a gas filtering device for a flammability testing machine according to the present utility model.

[0016] Figure 5 Top view cross-sectional diagram of a gas filtering device for a flammability testing machine according to the present utility model.

[0017] Figure 6 Installation state diagram of a power mechanism bearing ring according to the present utility model.

[0018] Figure 7 Schematic structural diagram of a filtering bearing pipe according to the present utility model.

[0019] Figure 8 Schematic structural diagram of a lower protective shell according to the present utility model. Detailed implementation manners

[0020] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments:

[0021] Embodiment 1:

[0022] A gas filtering device for a flammability testing machine, comprising a lower protective shell 1, an upper protective shell 3, upper fastening screws 7, lower fastening nuts 8, a filter bearing pipe 9, protective shell mounting screws 13, a power mechanism bearing ring 15, a driven gear ring 16, a filter block mounting cylinder 18, filter blocks 20, a drive motor 23, and a driving gear 25. The bottom of the filter bearing pipe 9 has an incoming gas pipe 2 to be filtered. Both sides of the filter bearing pipe 9 have anti-rotation positioning grooves 14. The power mechanism bearing ring 15 is sleeved and fixed on the outer side of the filter bearing pipe 9. When filtering the gas of the flammability testing machine, the driven gear ring 16 arranged on the outer side of the filter bearing pipe 9 is used to push the gas on the outer side to flow at a high speed through the gap between the upper protective shell 3 and the inner gas discharge pipe 21 and enter the inner part of the outer gas discharge pipe 4. The high-speed flowing gas reduces the air pressure inside the outer gas discharge pipe 4. The pressure difference between the inside of the incoming gas pipe 2 to be filtered and the inside of the outer gas discharge pipe 4 causes the gas to be filtered in the incoming gas pipe 2 to be filtered to flow through the filter blocks 20 and into the outer gas discharge pipe 4, completing the gas filtering operation. During the filtering process, the gas does not pass through mechanisms such as the driven gear ring 16, the driving gear 25, and the drive motor 23, making the power mechanism of this device less vulnerable to pollution by the gas to be filtered, so that this device does not need to be maintained frequently, and at the same time extends the service life of this device. The inner side of the power mechanism bearing ring 15 has a motor mounting platform 24. The motor mounting platform 24 is adapted to the anti-rotation positioning groove 14. The motor mounting platform 24 is connected to the anti-rotation positioning groove 14. The motor mounting platform 24 is inserted into the anti-rotation positioning groove 14. The top of the motor mounting platform 24 is fixedly connected to the drive motor 23. The inside of the motor mounting platform 24 is provided with a driving gear 25. The driving gear 25 is rotatably connected to the motor mounting platform 24. The drive motor 23 has a transmission shaft fixedly connected to the driving gear 25. The inner part of the power mechanism bearing ring 15 has a gear ring mounting platform 26.

[0023] Embodiment 2:

[0024] In the utility model, the driven gear ring 16 is rotatably connected to the gear ring mounting platform 26. The driving gear 25 meshes with the driven gear ring 16. The outer side of the driven gear ring 16 has fan blades 17. The bottom of the lower protective shell 1 has a lower hollow support plate 10. The bottom of the lower hollow support plate 10 has a housing mounting ring 11. The housing mounting ring 11 is sleeved on the outer side of the filter bearing pipe 9. The housing mounting ring 11 is located below the power mechanism bearing ring 15. The side of the housing mounting ring 11 has a side screw mounting platform 12. The side screw mounting platform 12 is threadedly connected to the protective shell mounting screw 13. The protective shell mounting screw 13 presses against the side of the filter bearing pipe 9.

[0025] Embodiment 3:

[0026] The top of the filter block mounting cylinder 18 of the present utility model has a handle 19. The filter block mounting cylinder 18 is adapted to the filter bearing pipe 9. The filter block mounting cylinder 18 is connected to the filter bearing pipe 9. The filter block mounting cylinder 18 is inserted into the interior of the filter bearing pipe 9. The filter block 20 is adapted to the filter block mounting cylinder 18. The filter block 20 is connected to the filter block mounting cylinder 18. The top of the filter block mounting cylinder 18 has a handle 19, enabling the operator to more conveniently remove the filter block 20 when replacing the filter block 20, increasing the convenience of the filter block 20 replacement operation. The filter block 20 is inserted into the interior of the filter block mounting cylinder 18. The top of the upper protective shell 3 has an external gas discharge pipe 4.

[0027] Embodiment 4:

[0028] The interior of the upper protective shell 3 of the present utility model has internal strengthening ribs 22. The upper protective shell 3 and the internal gas discharge pipe 21 both adopt a design of narrowing upwards, so that the cross-sectional area of the pipeline decreases during the process of the external gas flowing from the lower protective shell 1 to the external gas discharge pipe 4, thereby increasing the gas flow rate, further reducing the gas pressure inside the external gas discharge pipe 4, and increasing the filtration efficiency of this device. The internal gas discharge pipe 21 is inside the internal strengthening ribs 22. The bottom of the internal gas discharge pipe 21 is connected to the filter bearing pipe 9. The bottom of the upper protective shell 3 is connected to the lower protective shell 1. The lower protective shell 1, the upper protective shell 3, the internal gas discharge pipe 21, and the filter bearing pipe 9 adopt a split design, enabling the operator to conveniently remove the upper protective shell 3 by removing the upper fastening screw 7 and the lower fastening nut 8, exposing the internal space of the lower protective shell 1 and the internal space of the filter bearing pipe 9, facilitating the operator to maintain and replace this device. The two sides of the upper protective shell 3 have upper screw mounting ears 6, and the two sides of the lower protective shell 1 have lower screw mounting ears 5.

[0029] Embodiment 5:

[0030] The upper fastening screw 7 of the present utility model sequentially passes through the upper screw mounting ear 6 and the lower screw mounting ear 5 and is threadedly connected to the lower fastening nut 8. The top nut of the upper fastening screw 7 presses on the upper part of the upper screw mounting ear 6, and the lower fastening nut 8 presses on the lower part of the lower screw mounting ear 5.

[0031] Embodiment 6:

[0032] Installation steps of the utility model: Insert the driven gear ring 16 into the gear ring installation table 26 of the power mechanism bearing ring 15, insert the driving gear 25 into the motor installation table 24 of the driven gear ring 16, engage the driving gear 25 with the driven gear ring 16, fixedly connect the top of the motor installation table 24 with the driving motor 23, pass the transmission shaft of the driving motor 23 through the motor installation table 24 and fixedly connect it with the driving gear 25, sleeved the power mechanism bearing ring 15 outside the filter bearing pipe 9 and fix it, insert the motor installation table 24 into the anti-rotation positioning groove 14 of the filter bearing pipe 9, sleeved the housing installation ring 11 of the lower protective housing 1 outside the filter bearing pipe 9 and fix it, thread the side screw installation table 12 of the housing installation ring 11 with the protective housing installation screw 13, press the protective housing installation screw 13 against the side of the filter bearing pipe 9, insert the filter block 20 into the filter block installation cylinder 18, insert the filter block installation cylinder 18 into the filter bearing pipe 9, connect the bottom of the upper protective housing 3 with the lower protective housing 1, connect the bottom of the inner gas discharge pipe 21 of the upper protective housing 3 with the filter bearing pipe 9, sequentially pass the upper fastening screw 7 through the upper screw installation ear 6 of the upper protective housing 3 and the lower screw installation ear 5 of the lower protective housing 1 and then thread it with the lower fastening nut 8, press the nut of the upper fastening screw 7 against the upper part of the upper screw installation ear 6, and press the lower fastening nut 8 against the lower part of the lower screw installation ear 5. The installation of this device is completed.

[0033] The above are only the preferred embodiments of the utility model and are not used to limit the utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A gas filter device for a flammability test machine, characterized in that The invention comprises a lower protective shell (1), an upper protective shell (3), an upper fastening screw (7), a lower fastening nut (8), a filter bearing tube (9), a protective shell mounting screw (13), a power mechanism bearing ring (15), a driven gear ring (16), a filter block mounting cylinder (18), a filter block (20), a driving motor (23), and a driving gear (25), wherein the bottom of the filter bearing tube (9) is provided with a to-be-filtered gas inflow tube (2), both sides of the filter bearing tube (9) are provided with anti-rotation positioning grooves (14), the power mechanism bearing ring (15) is sleeved on the outer side of the filter bearing tube (9) and fixed, and the inner side of the power mechanism bearing ring (15) is provided with a A motor mounting platform (24) is provided, the motor mounting platform (24) is adapted to the anti-rotation positioning groove (14), the motor mounting platform (24) is connected to the anti-rotation positioning groove (14), the motor mounting platform (24) is inserted into the anti-rotation positioning groove (14), the top of the motor mounting platform (24) is fixedly connected to the driving motor (23), a driving gear (25) is arranged inside the motor mounting platform (24), the driving gear (25) is rotatably connected to the motor mounting platform (24), a transmission shaft of the driving motor (23) is fixedly connected to the driving gear (25), and a gear ring mounting platform (26) is provided inside the power mechanism bearing ring (15).

2. A gas filter device for a flammability test machine according to claim 1, characterized in that The driven gear ring (16) is rotatably connected to the gear ring mounting platform (26), the driving gear (25) is meshed with the driven gear ring (16), the driven gear ring (16) has a fan blade (17) on the outside, the bottom of the lower protective shell (1) has a lower hollow support plate (10), the bottom of the lower hollow support plate (10) has a shell mounting ring (11), the shell mounting ring (11) is sleeved on the outside of the filter bearing tube (9), the shell mounting ring (11) is located at the bottom of the power mechanism bearing ring (15), the side of the shell mounting ring (11) has a side screw mounting platform (12), the side screw mounting platform (12) is threadedly connected to the protective shell mounting screw (13), and the protective shell mounting screw (13) is pressed against the side of the filter bearing tube (9).

3. A gas filter device for a flammability test machine according to claim 2, characterized in that The filter block mounting cylinder (18) has a handle (19) at the top, the filter block mounting cylinder (18) is adapted to the filter support tube (9), the filter block mounting cylinder (18) is connected to the filter support tube (9), the filter block mounting cylinder (18) is inserted into the filter support tube (9), the filter block (20) is adapted to the filter block mounting cylinder (18), the filter block (20) is connected to the filter block mounting cylinder (18), the filter block (20) is inserted into the filter block mounting cylinder (18), and the top of the upper protective shell (3) has an external gas discharge pipe (4).

4. A gas filter device for a flammability test machine according to claim 3, characterized in that The upper protective shell (3) has an inner reinforcement rib (22) inside, the inner reinforcement rib (22) has an inner gas exhaust pipe (21) inside, the bottom of the inner gas exhaust pipe (21) is connected to the filter support pipe (9), the bottom of the upper protective shell (3) is connected to the lower protective shell (1), the upper protective shell (3) has upper screw mounting ears (6) on both sides, and the lower protective shell (1) has lower screw mounting ears (5) on both sides.

5. A gas filter device for a flammability test machine according to claim 4, characterized in that The upper fastening screw (7) passes through the upper screw mounting ear (6), the lower screw mounting ear (5) in sequence and is threadedly connected to the lower fastening nut (8). The top nut of the upper fastening screw (7) is pressed against the upper part of the upper screw mounting ear (6), and the lower fastening nut (8) is pressed against the lower part of the lower screw mounting ear (5).

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