CN219923648U - Screening device for oil-based rock debris distillation furnace outlet - Google Patents

Abstract

The utility model belongs to the technical field of oil-based rock debris treatment equipment, and particularly relates to a screening device for an outlet of an oil-based rock debris distillation furnace; which comprises a screening assembly and a coarse powder collecting device; the feed inlet of screening subassembly and the discharge end sealing connection of cover are collected to the material gas, and the fine material export of screening subassembly and the feed end sealing connection of locking device of unloading, the coarse material export of screening subassembly and coarse material import sealing connection of coarse powder collection device. The screening device can prevent external air from entering the anaerobic distillation equipment and contacting with inflammable and explosive oil-water mixed steam in the anaerobic distillation equipment so as to improve the operation safety of the anaerobic distillation equipment, and the screening device can divide high-temperature oil-based rock debris dry slag sent out by the rotary kiln into fine materials and coarse materials and respectively send the fine materials and the coarse materials to the unloading and air locking device and the coarse powder collecting device so as to prevent the coarse materials from entering the unloading and air locking device to cause the occurrence of blocking, thereby enabling the operation of the anaerobic distillation equipment to be smoother.

Description

Screening device for oil-based rock debris distillation furnace outlet

Technical Field

The utility model belongs to the technical field of oil-based rock debris treatment equipment, and particularly relates to a screening device for an outlet of an oil-based rock debris distillation furnace.

Background

The method comprises the steps that a drilling company can generate a large amount of oil-based rock scraps in the shale gas drilling process, the oil-based rock scraps have dangerous characteristics and are listed in a national dangerous waste directory, and the drilling company needs to bag and temporarily store the oil-based rock scraps at an operation site and then deliver the oil-based rock scraps to a qualified unit for disposal; in the process of on-site bagging, stones and garbage in the field and sundries such as waste iron and the like generated in the equipment maintenance process are often mixed in the bag.

When the treatment unit is pretreated at the front end of the treatment line, only preliminary sorting can be carried out, part of sundries such as stones, garbage, scrap iron and the like are wrapped and extruded by oil dirt to form a block, the block has higher oil-containing water content and higher adhesiveness, the block cannot be effectively screened, and can only be crushed into smaller blocks and sent into the anaerobic distillation equipment to realize the separation of the sundries and the oil water by using high temperature;

in the prior art, the dry slag after high-temperature treatment is directly sent into a discharging and air locking device (shown in figure 1) after passing through a material air collecting cover, and the dry slag after high-temperature treatment contains more stone blocks, scrap iron and other undegraded block materials, and the block materials often cause the blockage of the discharging and air locking device, so that the probability of equipment failure is increased;

in addition, as the temperature of the dry slag after high-temperature treatment is 300-350 ℃, a large amount of inflammable and explosive oil-water mixed vapor exists in the equipment, once the blockage of the unloading and air locking device occurs, the dry slag can be treated after the shutdown and the temperature reduction, so that the maintenance time is increased, and in addition, a large potential safety hazard exists in the maintenance process. Therefore, the utility model discloses a screening device capable of screening the non-degradable bulk materials in the dry slag in high-temperature treatment equipment, and the screening device is a technical problem to be solved by a person skilled in the art.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a screening device for an outlet of an oil-based rock debris distillation furnace, which aims to solve the technical problem that the unloading and air locking device is easy to block due to the fact that dry slag after high-temperature treatment contains more stones, scrap iron and other undegradable block materials in the prior art.

The utility model is realized by the following technical scheme:

a screening device for an outlet of an oil-based rock debris distillation furnace, comprising a screening assembly and a coarse powder collection device;

the feed inlet of the screening component is in sealing connection with the discharge end of the feed gas collecting cover, the fine material outlet of the screening component is in sealing connection with the feed end of the discharge air locking device, and the coarse material outlet of the screening component is in sealing connection with the coarse material inlet of the coarse powder collecting device;

the high-temperature oil-based rock debris dry slag sent out by the rotary kiln enters the screening assembly through the material gas collecting cover, is divided into fine materials and coarse materials in the screening assembly, and is sent to the unloading and gas locking device and the coarse powder collecting device respectively.

To better practice the present utility model, further optimized in the above construction, the screen assembly includes a screen box, a screen, and a vibrating assembly;

the inside of the screening box is provided with a screening cavity, the feeding port, the fine material outlet and the coarse material outlet are all arranged on the screening box, and the feeding port, the fine material outlet and the coarse material outlet are all communicated with the screening cavity;

the screen is arranged in the screening cavity, the screen is positioned between the feeding hole and the fine material outlet, a material outlet is arranged on the screen, and the material outlet is positioned above the coarse material outlet;

the vibrating assembly is arranged on the screening box, and the action end of the vibrating assembly is in transmission connection with the screen.

In order to better implement the present utility model, further optimization is made in the above structure, the vibration assembly includes an electromagnetic vibrator, a pipe sleeve, and a connection plate;

the screening box is provided with a through hole communicated with the screening cavity, the fixed end of the pipe sleeve is arranged at the through hole in a sealing mode, the electromagnetic vibrator is arranged at the movable end of the pipe sleeve in a sealing mode, and the action end of the electromagnetic vibrator penetrates through the pipe sleeve and the through hole and extends into the screening cavity;

the connecting plate is fixedly arranged on the screen, and the action end of the electromagnetic vibrator is in transmission connection with the connecting plate.

In order to better realize the utility model, in the structure, a plurality of supporting springs are arranged in the screening cavity, all the supporting springs are sequentially arranged around the circumference of the fine material outlet, a support is arranged on the side wall of the screen corresponding to the supporting springs, and one end of the supporting spring away from the fine material outlet is fixedly connected with the support.

In order to better realize the utility model, the structure is further optimized, the screen is obliquely arranged in the screening cavity, the height of one end of the screen, which is close to the coarse material outlet, is lower than that of one end of the screen, which is far away from the coarse material outlet, and the material outlet is arranged at one end of the screen, which is close to the coarse material outlet.

In order to better realize the utility model, the structure is further optimized, a funnel is arranged at the coarse material outlet, and the material outlet extends into the funnel.

In order to better realize the utility model, the structure is further optimized, and the coarse powder collecting device comprises a collecting pipe, a closed valve, a collecting barrel and an electronic platform scale;

the feeding end of the collecting pipe is in sealing connection with the coarse material outlet, the discharging end of the collecting pipe is in sealing connection with the inlet end of the collecting barrel through the sealing valve, and the electronic platform scale is located below the collecting barrel.

In order to better realize the utility model, in the structure, a connecting pipe is arranged between the sealing valve and the collecting barrel, an air inlet is arranged on the side wall of the connecting pipe, a pressure sensor is arranged at the air inlet, and the air inlet end of the inert gas charging device is connected with the air inlet in a sealing way.

In order to better realize the utility model, in the structure, the end of the connecting pipe far away from the sealing valve is provided with a sealing flange A, a plurality of tensioning cylinders are arranged on the sealing flange A, and the tensioning cylinders are arranged around the circumference of the sealing flange A;

the inlet end of the collecting barrel is provided with a sealing flange B, a plurality of bayonets which are clamped and matched with the action end of the tensioning cylinder are arranged on the sealing flange B, and the sealing flange A and the sealing flange B are tightly connected with the bayonets through the connecting end of the tensioning cylinder.

In order to achieve the utility model in a better way, a further optimization is made in the above structure, wherein a sealing ring for sealing the gap between the sealing flange A and the sealing flange B is arranged on the side of the sealing flange A facing away from the connecting pipe.

In summary, the utility model has the following technical effects:

the screening device is arranged between the material gas collecting cover and the unloading and locking device in the anaerobic distillation equipment in a sealing manner, external air can be prevented from entering the anaerobic distillation equipment to be in contact with inflammable and explosive oil-water mixed steam in the anaerobic distillation equipment, so that the operation safety of the anaerobic distillation equipment is improved, the screening device can divide high-temperature oil-based rock debris dry slag sent out by the rotary kiln into fine materials and coarse materials, the fine materials and the coarse materials are respectively sent to the unloading and locking device and the coarse powder collecting device, the coarse materials are prevented from entering the unloading and locking device to cause occurrence of blocking, and the failure probability of the anaerobic distillation equipment is reduced, so that the operation of the anaerobic distillation equipment is smoother.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a prior art anaerobic distillation apparatus;

FIG. 2 is a schematic view of a screening apparatus for an oil-based cuttings distilling furnace outlet of the present utility model in an installed state;

FIG. 3 is a schematic illustration of a screening apparatus for an oil-based cuttings distilling furnace outlet of the present utility model;

fig. 4 is a partial enlarged view of a portion a in fig. 3;

fig. 5 is a cross-sectional view of a screening apparatus for an oil-based cuttings distilling furnace outlet of the present utility model.

Reference numerals:

1. a screen assembly; 11. a screening box; 12. a screen; 13. a vibration assembly; 131. an electromagnetic vibrator; 132. a pipe sleeve; 133. a connecting plate; 14. a support spring; 15. a funnel;

2. a coarse powder collecting device; 21. a collection pipe; 22. a closing valve; 23. a collecting barrel; 231. a sealing flange B; 232. a bayonet; 24. a connecting pipe; 241. an air inlet; 242. a pressure sensor; 243. sealing the flange A; 244. a tensioning cylinder; 25. a seal ring; 26. an electronic platform scale;

3. a material gas collection cover;

4. a discharging air locking device;

5. and (5) a rotary kiln.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

In the description of the present utility model, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

Examples:

as shown in fig. 2 to 5:

a screening device, in particular to a screening device for an outlet of an oil-based rock debris distillation furnace, which comprises a screening assembly 1 and a coarse powder collecting device 2;

the feed inlet and the discharge end sealing connection of material gas collection cover 3 of screening subassembly 1, the fine material export and the feed end sealing connection of unloading locking device 4 of screening subassembly 1, the coarse material export and the coarse material import sealing connection of coarse powder collection device 2 of screening subassembly 1.

The screening device can prevent external air from entering the anaerobic distillation equipment to be contacted with inflammable and explosive oil-water mixed steam in the anaerobic distillation equipment so as to avoid occurrence of fire or explosion and other safety accidents, thereby effectively improving the operation safety of the anaerobic distillation equipment;

and this screening plant can divide into fine material and coarse fodder with the high temperature oil-based detritus dry slag that rotary kiln 5 sent, and the fine material can go into follow-up equipment through unloading locking device 4 and continue to handle, and coarse fodder then can get into coarse powder collection device 2 and collect to avoid coarse fodder to get into unloading locking device 4 and lead to its condition emergence of card to hinder, thereby make the operation of anaerobic distillation equipment more smooth and easy.

It should be noted that, the above-mentioned sealing connection refers to the tight connection between the feed inlet of the screening assembly 1 and the discharge end of the feed gas collecting cover 3, the fine material outlet of the screening assembly 1 and the feed end of the discharge air locking device 4, or the connection between the coarse material outlet of the screening assembly 1 and the coarse material inlet of the coarse powder collecting device 2, and the tight connection between the connection can be achieved by using a sealing ring or glue, so as to avoid the air entering the anaerobic distillation device from the connection to cause fire or explosion and other safety accidents, thereby making the operation of the anaerobic distillation device safer.

Preferably, the above-mentioned screening assembly 1 comprises a screening box 11, a screen 12 and a vibrating assembly 13; wherein, the liquid crystal display device comprises a liquid crystal display device,

the screening box 11 is internally provided with a screening cavity, the feeding port, the fine material outlet and the coarse material outlet are all arranged on the screening box 11, and the feeding port, the fine material outlet and the coarse material outlet are all communicated with the screening cavity;

the screen 12 is arranged in the screening cavity, the screen 12 is positioned between the feed inlet and the fine material outlet, and fine materials in the high-temperature oil-based rock debris dry slag sent out by the rotary kiln 5 can directly fall to the fine material outlet through the screen 12 and enter the unloading and air locking device 4 from the fine material outlet;

the screen 12 is provided with a material outlet, the material outlet is positioned above the coarse material outlet, coarse materials in the high-temperature oil-based rock debris dry slag sent out by the rotary kiln 5 can be screened out by the screen 12, fall into the coarse material outlet through the material outlet, and enter the coarse powder collecting device 2 from the coarse material outlet so as to realize separation of fine materials and coarse materials;

the vibration component 13 is arranged on the screening box 11, and the action end of the vibration component 13 is in transmission connection with the screen 12 so as to drive the screen 12 to vibrate, thereby avoiding the condition that the screen 12 is blocked due to the fact that high-temperature oil-based rock debris dry slag stays on the screen 12, and further better screening fine materials and coarse materials.

Preferably, the vibration assembly 13 includes an electromagnetic vibrator 131, a tube sleeve 132 and a connecting plate 133; wherein, the liquid crystal display device comprises a liquid crystal display device,

the screening box 11 is provided with a through hole communicated with the screening cavity, the fixed end of the pipe sleeve 132 is arranged at the through hole in a sealing way, the electromagnetic vibrator 131 is arranged at the movable end of the pipe sleeve 132 in a sealing way, and the action end of the electromagnetic vibrator 131 passes through the pipe sleeve 132 and the through hole and extends into the screening cavity;

the connecting plate 133 is fixedly arranged on the screen 12, and the action end of the electromagnetic vibrator 131 is in transmission connection with the connecting plate 133; this arrangement prevents air from entering the anaerobic distillation apparatus through the through-hole, and allows the vibration force generated by the electromagnetic vibrator 131 to be transmitted to the screen 12 to better drive the screen 12 to vibrate.

Optimally, a plurality of supporting springs 14 are arranged in the screening cavity, all the supporting springs 14 are sequentially arranged around the circumference of the fine material outlet, a support is arranged at the position, corresponding to the supporting springs 14, of the circumference of the screen 12, and one end, far away from the fine material outlet, of the supporting springs 14 is fixedly connected with the support;

when the electromagnetic vibrator 131 drives the screen 12 to act, the supporting spring 14 can support the screen 12 and provide a certain elastic force for the screen 12, so that the screen 12 can more rapidly complete screening of fine materials and coarse materials.

Preferably, the screen 12 is obliquely disposed in the screening cavity, and the height of one end of the screen 12 near the coarse material outlet is lower than the height of one end of the screen 12 far away from the coarse material outlet, and the material outlet is disposed at one end of the screen 12 near the coarse material outlet;

when the electromagnetic vibrator 131 drives the screen 12 to act, fine materials can directly pass through the screen 12 and fall into the unloading and air locking device 4, while coarse materials can move to a material outlet along the inclined screen 12 and fall into the coarse material outlet through the material outlet, so that coarse materials can be collected more rapidly.

Optimally, the hopper 15 is arranged at the coarse material outlet, the material outlet extends into the hopper 15, and the coarse material is prevented from falling to other positions of the screening box 11 and cannot enter the coarse material collecting device 2, so that the coarse material is collected more conveniently.

Preferably, the coarse powder collecting device 2 comprises a collecting pipe 21, a sealing valve 22 and a collecting barrel 23; wherein, the liquid crystal display device comprises a liquid crystal display device,

the feed end and the coarse fodder export sealing connection of collecting pipe 21, the discharge end of collecting pipe 21 passes through sealing valve 22 and the entrance point sealing connection of collecting vessel 23, and the coarse fodder passes through collecting pipe 21 and sealing valve 22 in proper order by the coarse fodder export and gets into in the collecting vessel 23 to make the collection of coarse fodder more convenient.

Specifically, a connecting pipe 24 is arranged between the sealing valve 22 and the collecting barrel 23, an air inlet 241 is arranged on the side wall of the connecting pipe 24, a pressure sensor 242 is arranged at the air inlet 241, and the air inlet end of the inert gas charging device is connected with the air inlet 241 in a sealing way;

when the coarse materials in the collecting barrel 23 reach a fixed value, a worker can perform barrel unloading operation; before unloading, the worker needs to close the closing valve 22 to disconnect the collecting barrel 23 from the collecting pipe 21, at this time, the inert gas charging device can inject compressed nitrogen into the connecting pipe 24 through the gas inlet 241, and after waiting for a certain time, the value fed back by the pressure sensor 242 judges whether the closing valve 22 is completely closed;

when the value fed back by the pressure sensor 242 is a normal value, the closing valve 22 is completely closed, and no gas leakage occurs when the collecting barrel 23 is replaced, at this time, a worker can detach the collecting barrel 23 from the connecting pipe 24 and install a new collecting barrel 23 on the connecting pipe 24 to complete the replacement of the collecting barrel 23;

when the value fed back by the pressure sensor 242 is smaller than the normal value, it indicates that the closing valve 22 is not completely closed, and the collection tank 23 cannot be replaced, and it is necessary to adjust the closing valve 22 and detect whether the closing valve 22 is completely closed again, so as to ensure the operation safety of the anaerobic distillation apparatus.

After the replacement of the collecting vessel 23 is completed, the worker needs to use the inert gas charging device to inject compressed nitrogen into the connecting tube 24 through the gas inlet 241 again, and after waiting for a certain time, the worker determines whether the connection between the collecting vessel 23 and the connecting tube 24 is completely sealed according to the value fed back by the pressure sensor 242, so as to avoid the occurrence of safety accidents caused by the air entering from the connection between the collecting vessel 23 and the connecting tube 24.

Preferably, a sealing flange a243 is disposed at one end of the connecting pipe 24 far away from the sealing valve 22, a plurality of tensioning cylinders 244 are disposed on the sealing flange a243, and the plurality of tensioning cylinders 244 are disposed around the circumference of the sealing flange a 243;

the inlet end of the collecting barrel 23 is provided with a sealing flange B231, and the sealing flange B231 is provided with a plurality of bayonets 232 which are in clamping fit with the action ends of the tensioning cylinders 244;

when the collecting barrel 23 is replaced, a worker only needs to operate the action end of the tensioning cylinder 244 to extend in a direction away from the connecting pipe 24 so as to separate the inlet end of the collecting barrel 23 from the connecting pipe 24, and at the moment, the worker can rotate the collecting barrel 23 or the connecting pipe 24 so as to separate the connecting end of the tensioning cylinder 244 on the connecting pipe 24 from the bayonet 232, thereby completing the separation of the collecting barrel 23 and the connecting pipe 24;

when the collecting barrel 23 is installed, the bayonet 232 on the collecting barrel 23 is only required to be clamped with the connecting end of the tensioning cylinder 244 on the connecting pipe 24, and then the action end of the tensioning cylinder 244 is operated to shrink towards the direction close to the connecting pipe 24, so that the inlet end of the collecting barrel 23 is abutted with the connecting pipe 24, and the collecting barrel 23 is more convenient to replace.

Preferably, an electronic platform scale 26 is arranged below the collecting barrel 23, and in the working process of the screening device, the collecting barrel 23 is always located above the electronic platform scale 26, and a worker can vertically judge the amount of coarse materials in the collecting barrel 23 through the display of the electronic platform scale 26 so as to better know the working state of the screening device.

More preferably, the screening device further comprises a control system, wherein the vibration assembly 13, the closing valve 22, the inert gas charging device, the tensioning cylinder 244, the pressure sensor 242 and the electronic platform balance 26 are all electrically connected with the control system, the control system can directly control the opening/closing of the vibration assembly 13, the action of the closing valve 22, the opening/closing of the inert gas charging device and the action of the tensioning cylinder 244, and meanwhile, the control system can display the value fed back by the pressure sensor 242 and the value on the electronic platform balance 26, so that a worker can better operate the screening device and know the working state of the screening device, and the use of the screening device is more convenient.

Preferably, a sealing ring 25 for sealing a gap between the flange a243 and the flange B231 is disposed on a side of the sealing flange a243 facing away from the connecting pipe 24, so as to improve a sealing effect between the collecting vessel 23 and the connecting pipe 24.

The seal ring 25 is a high-temperature-resistant graphite packing seal ring.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. A screening plant for oil-based detritus distilling furnace export, its characterized in that: comprises a screening component (1) and a coarse powder collecting device (2);

the feeding port of the screening component (1) is in sealing connection with the discharging end of the material gas collecting cover (3), the fine material outlet of the screening component (1) is in sealing connection with the feeding end of the discharging air locking device (4), and the coarse material outlet of the screening component (1) is in sealing connection with the coarse material inlet of the coarse powder collecting device (2);

the high-temperature oil-based rock debris dry slag sent out by the rotary kiln (5) enters the screening assembly (1) through the feed gas collecting cover (3), is separated into fine materials and coarse materials in the screening assembly (1), and is sent to the discharging and air locking device (4) and the coarse powder collecting device (2) respectively.

2. A screening device according to claim 1, wherein: the screening assembly (1) comprises a screening box (11), a screen (12) and a vibration assembly (13);

the inside of the screening box (11) is provided with a screening cavity, the feed inlet, the fine material outlet and the coarse material outlet are all arranged on the screening box (11), and the feed inlet, the fine material outlet and the coarse material outlet are all communicated with the screening cavity;

the screen (12) is arranged in the screening cavity, the screen (12) is positioned between the feeding hole and the fine material outlet, the screen (12) is provided with a material outlet, and the material outlet is positioned above the coarse material outlet;

the vibrating assembly (13) is arranged on the screening box (11), and the action end of the vibrating assembly (13) is in transmission connection with the screen (12).

3. A screening device according to claim 2, wherein: the vibration assembly (13) comprises an electromagnetic vibrator (131), a pipe sleeve (132) and a connecting plate (133);

the screening box (11) is provided with a through hole communicated with the screening cavity, the fixed end of the pipe sleeve (132) is arranged at the through hole in a sealing mode, the electromagnetic vibrator (131) is arranged at the movable end of the pipe sleeve (132) in a sealing mode, and the action end of the electromagnetic vibrator (131) penetrates through the pipe sleeve (132) and the through hole and extends into the screening cavity;

the connecting plate (133) is fixedly arranged on the screen (12), and the action end of the electromagnetic vibrator (131) is in transmission connection with the connecting plate (133).

4. A screening device according to claim 3, wherein: a plurality of supporting springs (14) are arranged in the screening cavity, all the supporting springs (14) are sequentially arranged around the circumference of the fine material outlet, a support is arranged on the side wall of the screen (12) corresponding to the position of the supporting springs (14), and one end, far away from the fine material outlet, of each supporting spring (14) is fixedly connected with the support.

5. The screening apparatus of claim 4, wherein: the screen cloth (12) slope sets up in the screening cavity, just screen cloth (12) be close to the one end of coarse fodder export is located highly be less than screen cloth (12) are kept away from the one end of coarse fodder export is located highly, the material export sets up screen cloth (12) are close to the one end of coarse fodder export.

6. The screening apparatus of claim 5, wherein: the coarse fodder outlet is provided with a funnel (15), and the material outlet extends into the funnel (15).

7. A screening device according to any one of claims 1 to 6, wherein: the coarse powder collecting device (2) comprises a collecting pipe (21), a sealing valve (22), a collecting barrel (23) and an electronic platform balance (26);

the feeding end of the collecting pipe (21) is in sealing connection with the coarse material outlet, the discharging end of the collecting pipe (21) is in sealing connection with the inlet end of the collecting barrel (23) through the sealing valve (22), and the electronic platform scale (26) is located below the collecting barrel (23).

8. The screening apparatus of claim 7, wherein: a connecting pipe (24) is arranged between the sealing valve (22) and the collecting barrel (23), an air inlet (241) is arranged on the side wall of the connecting pipe (24), a pressure sensor (242) is arranged at the air inlet (241), and the air inlet end of the inert gas charging device is in sealing connection with the air inlet (241).

9. The screening apparatus of claim 8, wherein: a sealing flange A (243) is arranged at one end, far away from the sealing valve (22), of the connecting pipe (24), a plurality of tensioning cylinders (244) are arranged on the sealing flange A (243), and the tensioning cylinders (244) are arranged around the circumference of the sealing flange A (243);

the inlet end of the collecting barrel (23) is provided with a sealing flange B (231), a plurality of bayonets (232) which are matched with the action ends of the tensioning cylinders (244) in a clamping mode are arranged on the sealing flange B (231), and the sealing flange A (243) and the sealing flange B (231) are tightly connected with the bayonets (232) through the connecting ends of the tensioning cylinders (244).

10. A screening device according to claim 9, wherein: a sealing ring (25) for sealing a gap between the sealing flange A (243) and the sealing flange B (231) is arranged on the side of the sealing flange A (243) facing away from the connecting pipe (24).