Protective device, vacuumizing device and aluminothermic reduction system

Abstract

The utility model discloses a protection device, a vacuumizing device and an aluminothermic reduction system, and relates to the technical field of protection devices.The protection device comprises an oil return prevention device and a filtering device, the oil return prevention device is communicated with the filtering device, the filtering device is used for being communicated with an exhaust port of an aluminothermic reduction furnace, and the oil return prevention device is used for being communicated with a vacuum pump; the oil return prevention device can receive oil leaked from the vacuum pump and prevent the oil leaked from the vacuum pump from flowing into the aluminothermic reduction furnace to contaminate materials, and the filtering device can adsorb dust in gas extracted from the aluminothermic reduction furnace; the vacuumizing device comprises a vacuum pump and the protection device. The aluminothermic reduction system comprises an aluminothermic reduction furnace and the vacuumizing device. According to the vacuum pump, leaked oil of the vacuum pump can be received, material pollution is avoided, oil leaked from the vacuum pump can be prevented from splashing into the filter device to pollute a filter element of the filter device, the service life of the filter element is prolonged, dust entering gas of the vacuum pump can be adsorbed, and the service life of the vacuum pump is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of protective device technology, and in particular to a protective device, a vacuum device, and an aluminothermic reduction system. Background Technology

[0002] Currently, aluminothermic reduction furnaces use vacuum pumps to create a vacuum environment for the thermal reduction reaction. Existing patent CN206266681U discloses a dual-temperature zone aluminum reduction device, including a temperature controller, a high-temperature resistant quartz tube, and a vacuum pump. The high-temperature resistant quartz tube contains a ceramic boat for holding the sample and another for holding aluminum powder. The two ceramic boats are placed in two temperature control zones, each connected to its respective temperature controller. Vacuum sealing systems and valves are connected to both ends of the high-temperature resistant quartz tube. The vacuum sealing system and valve at the sample-holding ceramic boat end are connected to the vacuum pump. However, in use, this patent involves a direct connection between the vacuum pump and the aluminothermic reduction furnace. If the vacuum pump leaks oil during the vacuuming process, atmospheric pressure will force the leaked oil through the direct connection into the furnace, causing material contamination. Furthermore, the device lacks a filter, and dust in the gas extracted from the furnace during vacuuming can damage the vacuum pump, reducing its lifespan. Utility Model Content

[0003] The purpose of this invention is to provide a protective device, a vacuum pumping device, and an aluminothermic reduction system to solve the problems existing in the prior art, to withstand oil leakage from the vacuum pump, to avoid material contamination, and to improve the service life of the vacuum pump.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a protective device, including: an anti-backflow device and a filter device. The anti-backflow device is connected to the filter device, the filter device is connected to the exhaust port of the aluminothermic reduction furnace, the anti-backflow device is connected to a vacuum pump, and the anti-backflow device can catch the oil leaking from the vacuum pump to prevent the oil leaking from the vacuum pump from flowing into the aluminothermic reduction furnace and contaminating the materials. The filter device can adsorb dust in the gas extracted from the aluminothermic reduction furnace.

[0006] In some embodiments, the anti-backflow device includes a housing, a first air inlet, and a first air outlet. The first air inlet and the first air outlet are both located on the side wall of the housing. The first air inlet is higher than the bottom wall of the housing. The first air inlet is used to communicate with the filter device, and the first air outlet is used to communicate with the vacuum pump.

[0007] In some embodiments, the distance between the first air inlet and the bottom surface of the housing is greater than the distance between the first air outlet and the bottom surface of the housing.

[0008] In some embodiments, the anti-backflow device further includes a first vent pipe, which extends through the first vent into the housing and toward the bottom of the housing. The opening of the first vent pipe toward the bottom of the housing is closer to the bottom surface of the housing than the first vent. The two ends of the first vent pipe are respectively connected to the housing and the vacuum pump.

[0009] In some embodiments, the anti-backflow device further includes an oil drain port, which is located on the bottom wall of the housing or on a side wall near the bottom wall.

[0010] In some embodiments, the filtration device includes a filter box and a filter element, the filter element being fixedly connected inside the filter box, the filter box having a second air inlet and a second air outlet, the filter element being disposed at the second air inlet and capable of covering the second air inlet, the second air outlet being connected to the anti-backflow device, and the second air inlet being connected to the exhaust port of the aluminothermic reduction furnace.

[0011] In some embodiments, a flashback prevention device is also included, which has a third air inlet and a third air outlet. The third air inlet is connected to the exhaust port of the aluminothermic reduction furnace, and the third air outlet is connected to the filter device. The flashback prevention device can reduce the amount of sparks in the exhaust gas discharged from the aluminothermic reduction furnace from entering the filter device.

[0012] In some embodiments, the backfire prevention device includes a tube and a plurality of baffles arranged along the axial direction of the tube. The third air inlet and the third air outlet are respectively opened at both ends of the tube. One end of each baffle is fixedly connected to the inner wall of the tube, and each baffle is provided with a gas flow hole. The gas flow holes on adjacent baffles are staggered. Each baffle is perpendicular to the axis of the tube, or the end of each baffle away from the inner wall of the tube is inclined toward the third air inlet and forms an acute angle with the inner wall of the tube. The gas discharged from the aluminothermic reduction furnace can enter the tube from the third air inlet and flow to the third air outlet through each of the gas flow holes.

[0013] This utility model also provides a vacuum pumping device, including a vacuum pump and the protective device as described in any one of the claims.

[0014] This utility model also provides an aluminothermic reduction system, including an aluminothermic reduction furnace and the vacuum device described in the claims.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] This utility model provides a protective device, a vacuum device, and an aluminothermic reduction system, including an anti-backflow oil device and a filter device. The anti-backflow oil device is connected to the filter device, which is connected to the exhaust port of the aluminothermic reduction furnace. The anti-backflow oil device is connected to the vacuum pump. When the vacuum pump draws gas from the aluminothermic reduction furnace, the gas in the aluminothermic reduction furnace is discharged from the exhaust port. After the filter device adsorbs dust in the gas, it enters the anti-backflow oil device and then enters the vacuum pump. This reduces the risk of dust in the gas entering the vacuum pump and damaging it, thus improving the service life of the vacuum pump. Furthermore, the anti-backflow oil device can catch oil leaking from the vacuum pump, preventing atmospheric pressure from splashing the leaking oil into the aluminothermic reduction furnace through a straight pipe and causing material contamination. It also prevents the leaking oil from splashing into the filter device and contaminating the filter element, thus improving the service life of the filter element. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the anti-backflow device in some embodiments of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the anti-filtering device and anti-backfire device in some embodiments of this utility model;

[0020] In the diagram: 100-Anti-backflow device, 101-Box body, 102-First air inlet, 103-First air outlet, 104-First air outlet pipe, 105-Oil drain port, 200-Filter device, 201-Filter box, 202-Filter element, 203-Second air inlet, 204-Second air outlet, 300-Anti-backfire device, 301-Pipe body, 302-Baffle plate, 303-Third air inlet, 304-Third air outlet. Detailed Implementation

[0021] 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.

[0022] The purpose of this invention is to provide a protective device, a vacuum pumping device, and an aluminothermic reduction system to solve the problems existing in the prior art, to withstand oil leakage from the vacuum pump, to avoid material contamination, and to improve the service life of the vacuum pump.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] This utility model provides a protective device, such as Figures 1-2 As shown, it includes: an anti-backflow oil device 100 and a filter device 200. The anti-backflow oil device 100 is connected to the filter device 200. The filter device 200 is connected to the exhaust port of the aluminothermic reduction furnace. The anti-backflow oil device 100 is connected to the vacuum pump. The anti-backflow oil device 100 can receive the oil leaking from the vacuum pump and prevent the oil leaking from the vacuum pump from flowing into the aluminothermic reduction furnace and contaminating the materials. The filter device 200 can adsorb the dust in the gas extracted from the aluminothermic reduction furnace.

[0026] An anti-backflow oil device 100 and a filter device 200 are connected in sequence. The anti-backflow oil device 100 can be connected to a vacuum pump, and the filter device 200 can be connected to the exhaust port of the aluminothermic reduction furnace. When the vacuum pump draws gas from the aluminothermic reduction furnace, the gas in the aluminothermic reduction furnace is discharged from the exhaust port. After the filter device 200 adsorbs the dust in the gas, it enters the anti-backflow oil device 100 and then enters the vacuum pump. This reduces the damage to the vacuum pump caused by dust in the gas, thus improving the service life of the vacuum pump. In addition, the anti-backflow oil device 100 can also catch the oil leaking from the vacuum pump, preventing atmospheric pressure from splashing the leaking oil into the aluminothermic reduction furnace through the straight pipe and causing material contamination. It can also prevent the leaking oil from the vacuum pump from splashing into the filter device and contaminating the filter element, thus improving the service life of the filter element.

[0027] In another embodiment of this invention, the anti-backflow oil device 100 includes a housing 101, a first air inlet 102, and a first air outlet 103. Both the first air inlet 102 and the first air outlet 103 are located on the side wall of the housing 101. The first air inlet 102 is higher than the bottom wall of the housing 101. The first air inlet 102 is used to communicate with the filter device 200, and the first air outlet 103 is used to communicate with the vacuum pump. The first air outlet 103 is connected to the vacuum pump, and the first air inlet 102 is connected to the filter device 200. The first air outlet 103 and the first air inlet 102 are spaced apart, allowing oil leaking from the vacuum pump to enter the housing 101 through the first air outlet 103. This allows the housing 101 to receive the leaking oil, preventing atmospheric pressure from splashing the leaking oil through a straight pipe into the aluminothermic reduction furnace or into the filter device 200.

[0028] In another embodiment of this invention, the distance between the first air inlet 102 and the bottom surface of the housing 101 is greater than the distance between the first air outlet 103 and the bottom surface of the housing 101. Oil leaking from the vacuum pump enters the housing 101 through the first air outlet 103 and flows to the bottom of the housing due to gravity, thus preventing oil leaking from the vacuum pump from entering the first air inlet 102.

[0029] In another embodiment of this invention, the anti-backflow oil device 100 further includes a first vent pipe 104. The first vent pipe 104 passes through the first vent port 103 and extends into the housing 101, extending towards the bottom of the housing 101. The opening of the first vent pipe 104 facing the bottom of the housing 101 is closer to the inner bottom surface of the housing 101 than the first air inlet 102. The two ends of the first vent pipe 104 are respectively connected to the housing and the vacuum pump. The first vent port 103, with its opening facing the bottom of the housing 101, reduces the amount of oil leaking from the vacuum pump that splashes onto the side wall of the housing 101 through the straight pipe, facilitates the collection of leaked oil, and makes cleaning the housing 101 easier.

[0030] In another embodiment of this invention, the anti-backflow device 100 further includes an oil drain port 105, which is located on the bottom wall of the housing 101 or on a side wall near the bottom wall. Oil accumulated at the bottom of the housing 101 can be discharged from the housing 101 through the oil drain port 105, facilitating the cleaning of the housing 101.

[0031] In another embodiment of this invention, the filtration device 200 includes a filter box 201 and a filter element 202. The filter element 202 is fixedly connected inside the filter box 201. The filter box 201 has a second air inlet 203 and a second air outlet 204. The filter element 202 is disposed at the second air inlet 203 and covers the second air inlet 203. The second air outlet 204 is connected to the anti-backflow oil device 100. The second air inlet 203 is connected to the exhaust port of the aluminothermic reduction furnace. Because the filter element 202 covers the second air inlet 203, all gas entering the filter box 203 from the second air inlet 203 passes through the filter element 202, resulting in more thorough adsorption of dust in the gas and a better filtration effect.

[0032] In another embodiment of this invention, a flashback prevention device 300 is also included. The flashback prevention device 300 has a third air inlet 303 and a third air outlet 304. The third air inlet 303 is connected to the exhaust port of the aluminothermic reduction furnace, and the third air outlet 304 is connected to the filter device 200. The flashback prevention device 300 reduces the amount of sparks from the exhaust gas from the aluminothermic reduction furnace entering the filter device 200. By reducing the amount of sparks from the exhaust gas from the aluminothermic reduction furnace entering the filter device 200, safety is improved.

[0033] In another embodiment of this invention, the backfire prevention device 300 includes a tube body 301 and a plurality of partitions 302 arranged along the axial direction of the tube body 301. A third air inlet 303 and a third air outlet 304 are respectively opened at both ends of the tube body 301. One end of each partition 302 is fixedly connected to the inner wall of the tube body 301, and each partition 302 is provided with a gas flow hole. The gas flow holes on two adjacent partitions are arranged alternately. Each partition 302 is perpendicular to the axis of the tube body 301, or the end of each partition 302 away from the inner wall of the tube body 301 is inclined toward the third air inlet 303 and forms an acute angle with the inner wall of the tube body 301. The gas discharged from the aluminothermic reduction furnace can enter the tube body 301 from the third air inlet 303 and flow to the third air outlet 304 through each gas flow hole. Each baffle 302 is provided with a gas flow hole, which can be an opening on each baffle 302 or a gap formed between each baffle 302 and the inner wall of the tube 301. The baffles 302 are arranged alternately. After the gas discharged from the aluminothermic reduction furnace enters the tube 301, the baffles 302 can block larger and heavier sparks, prevent them from continuing to move forward with the airflow, change the gas flow path, prolong the residence time of the gas in the tube 301, lower the gas temperature, and extinguish smaller sparks in the airflow.

[0034] Example 2

[0035] This embodiment provides a vacuuming device, including a vacuum pump and a protective device. The vacuum pump, an anti-backflow oil device 100, and a filter device 200 are connected in sequence. The filter device 200 can be connected to the exhaust port of the aluminothermic reduction furnace. When the vacuum pump is drawing gas from the aluminothermic reduction furnace, the gas in the aluminothermic reduction furnace is discharged from the exhaust port. After the filter device 200 adsorbs dust in the gas, it enters the anti-backflow oil device 100 and then enters the vacuum pump. This reduces the risk of dust in the gas entering the vacuum pump and damaging it, thus improving the service life of the vacuum pump. Furthermore, the anti-backflow oil device 100 can catch oil leaking from the vacuum pump, preventing atmospheric pressure from splashing the leaking oil into the aluminothermic reduction furnace through a straight pipe and causing material contamination. It also prevents the leaking oil from splashing into the filter device and contaminating the filter element, thus improving the service life of the filter element and the overall service life of the vacuuming device.

[0036] Example 3

[0037] This embodiment provides an aluminothermic reduction system, including an aluminothermic reduction furnace and a vacuum device. The aluminothermic reduction furnace, a filter device 200, an anti-backflow oil device 100, and a vacuum pump are connected in sequence. When the vacuum pump draws gas from the aluminothermic reduction furnace, the gas inside the furnace is discharged from the furnace's exhaust port. After the filter device 200 adsorbs dust from the gas, it enters the anti-backflow oil device 100 and then the vacuum pump. This reduces the risk of dust entering the vacuum pump and damaging it, thus extending its service life. Furthermore, the anti-backflow oil device 100 can catch oil leaking from the vacuum pump, preventing atmospheric pressure from splashing the leaking oil through a straight pipe into the aluminothermic reduction furnace and causing material contamination. It also prevents oil leaking from the vacuum pump from splashing into the filter device and contaminating the filter element, thus extending the filter element's service life and improving the overall service life of the aluminothermic reduction system.

[0038] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A protective device, characterized in that: The application relates to an oil return prevention device (100) and a filtering device (200), wherein the oil return prevention device (100) is communicated with the filtering device (200), the filtering device (200) is used for being communicated with an exhaust port of an aluminum thermal reduction furnace, the oil return prevention device (100) is used for being communicated with a vacuum pump, the oil return prevention device (100) can receive oil leaked from the vacuum pump, and the oil leaked from the vacuum pump is prevented from flowing into the aluminum thermal reduction furnace to contaminate materials; and the filtering device (200) can adsorb dust in gas drawn from the aluminum thermal reduction furnace. The oil return prevention device (100) comprises a box body (101), a first air inlet (102) and a first air outlet (103), the first air inlet (102) and the first air outlet (103) are arranged on the side wall of the box body (101), the first air inlet (102) is higher than the bottom wall of the box body (101), the first air inlet (102) is used for being communicated with the filtering device (200), and the first air outlet (103) is used for being communicated with the vacuum pump.

2. The guard of claim 1, wherein: The distance between the first air inlet (102) and the inner bottom surface of the box body (101) is greater than the distance between the first air outlet (103) and the inner bottom surface of the box body (101).

3. The guard of claim 2, wherein: The oil return prevention device (100) further comprises a first air outlet pipe (104), the first air outlet pipe (104) penetrates through the first air outlet (103) and extends into the box body (101) and extends towards the bottom of the box body (101), the pipe opening of the first air outlet pipe (104) towards the bottom of the box body (101) is closer to the inner bottom surface of the box body (101) than the first air inlet (102), and the two ends of the first air outlet pipe (104) are communicated with the box body and the vacuum pump respectively.

4. The guard of claim 2, wherein: The oil return prevention device (100) further comprises an oil discharge port (105), the oil discharge port (105) is arranged on the bottom wall or the side wall close to the bottom wall of the box body (101).

5. The guard of claim 2, wherein: The filtering device (200) comprises a filtering box (201) and a filter core (202), the filter core (202) is fixedly connected in the filtering box (201), the filtering box (201) is provided with a second air inlet (203) and a second air outlet (204), the filter core (202) is arranged at the second air inlet (203) and can cover the second air inlet (203), the second air outlet (204) is communicated with the oil return prevention device (100), and the second air inlet (203) can be communicated with the exhaust port of the aluminum thermal reduction furnace.

6. The guard of claim 1, wherein: The application further relates to a backfire prevention device (300), the backfire prevention device (300) is provided with a third air inlet (303) and a third air outlet (304), the third air inlet (303) can be communicated with the exhaust port of the aluminum thermal reduction furnace, the third air outlet (304) is communicated with the filtering device (200), and the backfire prevention device (300) can reduce the entry of sparks in tail gas discharged from the aluminum thermal reduction furnace into the filtering device (200).

7. The guard of claim 1, wherein: ​ 8. The guard of claim 7, wherein: The anti-backfire device (300) comprises a pipe body (301) and a plurality of partitions (302) arranged along the axial direction of the pipe body (301), the third gas inlet (303) and the third gas outlet (304) are respectively arranged at the two ends of the pipe body (301), one end of each partition (302) is fixedly connected with the inner wall of the pipe body (301), and a gas flow hole is arranged on each partition (302), and the gas flow holes on adjacent two partitions are staggered; each partition (302) is perpendicular to the axis of the pipe body (301), or the end of each partition (302) away from the inner wall of the pipe body (301) is inclined towards the third gas inlet (303) and forms an acute angle with the inner wall of the pipe body (301), and the gas discharged from the aluminum thermal reduction furnace can enter the pipe body (301) from the third gas inlet (303), flow through each gas flow hole and flow to the third gas outlet (304).

9. A vacuuming device characterized by: A vacuum pump and the protection device of any one of claims 1-8.

10. An aluminothermic reduction system characterized by: An aluminum thermal reduction furnace and the vacuumizing device of claim 9.

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