CN211939034U - Primary and secondary formula removes dust excluding hood car - Google Patents

Abstract

The utility model discloses a primary and secondary formula removes dust excluding hood car belongs to the dust collecting equipment field. The device comprises a pit, a first ladle arranged in the pit, and a second ladle arranged on the ground beside the pit; guide rails laid on the ground on two sides of the pit; the main dust hood is movably connected to the guide rail; the first driving unit drives the primary dust hood to reciprocate on the guide rail; the dust removal pipe is communicated with the primary dust removal cover; the secondary dust hood is movably connected to the upper part of the main dust hood; and the second driving unit drives the sub dust removing cover to reciprocate along the direction of the second ladle. The utility model discloses a setting of sub-dust excluding hood can cover two ladle top spaces comprehensively when carrying out the reladling, reaches higher dust removal effect, and sub-dust excluding hood can concertina movement, avoids taking place to interfere ladle, crane movement track through retrieving sub-dust excluding hood around the reladling, makes reladling system normal operating, has simple structure, reasonable in design, easily manufactured advantage.

Description

Primary and secondary formula removes dust excluding hood car

Technical Field

The utility model belongs to the dust collecting equipment field, more specifically say, relate to a primary and secondary formula removes dust excluding hood car.

Background

Because blast furnace for the molten iron jar with mismatch with the molten iron jar for the steelmaking, need dispose the molten iron reladling system, conventional molten iron reladling system has the pit formula, car-type and ground formula, but because the molten iron temperature is high, no matter which kind of form, when carrying out the molten iron reladling, all can produce a large amount of dense smoke and molten iron and splash, must set up dust collector and remove dust, dust collector will collect the flue gas as far as fully, and can not hinder the work of top crane, the ladle, satisfy the limited requirement of factory building utilization usage space position.

The existing dust removal device is arranged at the top and the side of the tank dumping system, dust is removed in a relatively open environment, smoke particles escape in the tank dumping process, the condition of poor dust removal effect causes environmental pollution, the safety of a workshop is influenced, the health of workers is harmed, and the normal safety production is influenced.

Through retrieval, the Chinese patent publication number: CN 210080717U; the publication date is as follows: 18 at 2020, month 02; the utility model discloses a remove pouring dust excluding hood, including controlling two standing legs, all install two walking wheels and a speed reducer in the bottom of each standing leg to the speed reducer passes through the speed reducer sprocket and is connected with one of them walking wheel transmission, installs the dust excluding hood at the top of two standing legs, and the top of this dust excluding hood is passed through the gate valve and is connected the dust removal pipeline. Although the device of this application has improved dust collector's mobility, makes it can be nimble in many positions and use, this dust excluding hood comparatively opens sealing performance not enough, and dust removal effect is still not good enough, and chain drive easily takes off the chain, brings the influence for normal use.

Through retrieval, the Chinese patent publication number: CN 208758301U; the publication date is as follows: 04/19/2019; the movable dust hood comprises a dust hood body, a steel structure and a traveling device, wherein the traveling device comprises wheels fixed at the lower end of the steel structure, and a speed reducer and a traveling track are connected to the wheels through a coupling; the air outlet department of dust excluding hood body be provided with the connecting pipe, the other end of connecting pipe passes through interfacing apparatus and links to each other with workshop trunk line. Compared with the device in the previous application, the device in the application has improved stability during operation, but the dust removal cover of the device has a square shape, and if the pit is completely covered in a working position, the hoisting of the hot metal ladle by an upper crane is affected, so that the requirements of mechanization and rapidness cannot be met; if the avoidance crown block does not completely cover the pit in the working position, a large amount of smoke and dust emerge from the pit, the sight of a crane worker above is disturbed, potential safety hazards are brought to lifting operation, and meanwhile, the airtightness is poor and the dust removal effect is not ideal due to the fact that the avoidance crown block leaves a dust removal point.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

To current dust collector at the not good enough problem of molten iron reladling in-process dust removal effect, the utility model provides a primary and secondary formula removes dust excluding hood car through the setting of sub-dust excluding hood, when carrying out the reladling, can carry out more comprehensive cover to the space of two ladle tops, reaches higher dust removal effect, and sub-dust excluding hood can concertina movement, avoids taking place to interfere ladle, the motion orbit of crane through withdrawing sub-dust excluding hood around the reladling, makes reladling system normal operating.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A primary-secondary type movable dust hood vehicle, which comprises,

the device comprises a pit, a first ladle arranged in the pit, and a second ladle arranged on the ground beside the pit;

the guide rails are laid on the ground on two sides of the pit;

the main dust hood is a three-surface shielding type hood body and is movably connected to the guide rail;

the first driving unit drives the primary dust hood to reciprocate on the guide rail;

the dust removal pipe is communicated with the primary dust removal cover;

further comprising:

the secondary dust hood is a frame-shaped hood body and is movably connected to the upper part of the main dust hood;

and the second driving unit drives the sub dust removing cover to reciprocate along the direction of the second ladle.

The guide rails are laid on the ground on two sides of the pit, the guide rails can be laid along the direction pointing to the second ladle, and can also be laid in the direction perpendicular to the previous laying mode, and the first laying direction is adopted in the scheme; the primary dust hood is a three-surface shielding type hood body commonly used for dust removal, the top surface and two side surfaces of the primary dust hood are shielded, the surface facing the second ladle is open for the second ladle to normally tip over, and the surface far away from the second ladle is provided with a hole for connecting a dust removal pipe which is communicated with dust removal equipment so as to timely suck out dust and remove dust; the first driving unit is used for providing power for the female dust hood and is a unit capable of moving on the guide rail, the first driving unit is arranged at the bottom of the female dust hood, the female dust hood is arranged on the guide rail in a matched mode through the first driving unit, and the female dust hood moves close to or away from the second ladle along the laying direction of the guide rail; the sub dust excluding hood is a key part for solving the technical problem, the shape of the sub dust excluding hood is identical to that of the upper half part of the main dust excluding hood, the sub dust excluding hood is in a shape of an Jiong-shaped frame and is movably connected to the upper part of the main dust excluding hood side, more specifically, the sub dust excluding hood is movably connected to the upper part of the main dust excluding hood side close to the second ladle, and the sub dust excluding hood can make an action close to/far away from the second ladle direction under the driving of the second driving unit.

Further, the second drive unit sets up in female dust excluding hood and son dust excluding hood both sides, includes:

a second driving member providing a driving force;

the gear is connected with the sub dust removing cover and is in transmission connection with the second driving piece;

and the racks are horizontally fixed on two sides of the female dust hood and are meshed with the gears.

The second driving piece can be for gear motor etc. can provide the component of power, the removal of sub-dust excluding hood is realized to this scheme adoption rack gear's mode, specifically do, the rack level is fixed in female dust excluding hood both sides, gear and sub-dust excluding hood both sides bottom fixed connection and gear and rack toothing, gear motor is connected with gear drive formula, starts when gear motor, drives gear revolve, under meshing mechanism's effect, the gear walks on the rack, drive sub-dust excluding hood and remove on female dust excluding hood from this.

Further, the second driving unit further includes:

the support guide rails are horizontally fixed on two sides of the mother dust hood and are C-shaped rails;

and the second roller is connected with the sub dust hood, and the second roller is arranged in the supporting guide rail in a matching manner.

The support guided way level that is the C type is fixed in female dust excluding hood both sides, and two fixed connection of gyro wheel are in son dust excluding hood both sides, and two cooperations of gyro wheel are arranged in supporting the guided way, under the restriction of this structure, make son dust excluding hood have stable motion trail, and the weight that gyro wheel two and support guided way cooperation support son dust excluding hood prevents to receive too big load accelerated wear between rack and pinion among the rack gear mechanism and influences its accurate transmission.

Furthermore, the two ends of the supporting guide rail are fixedly connected with end plates, and the two ends of the supporting guide rail are sealed.

Through the setting of end plate, can prescribe a limit to the extreme position that the sub-dust excluding hood removed and prevent that the sub-dust excluding hood from rushing out the support guided way and causing the potential safety hazard under drive unit trouble or inertial circumstances.

Furthermore, the two ends of the guide rail are upwards protruded to form car stops.

The car keeps off the effect similar with the end plate effect, sets up at the guide rail both ends, prevents that female dust excluding hood from removing the in-process and rushing out the guide rail and cause the potential safety hazard.

Further, the first driving unit includes:

a first driving member providing a driving force;

the first roller is connected with the bottom of the primary dust hood and supports the primary dust hood to move on the guide rail;

the gyro wheel divide into from driving wheel and action wheel, and the action wheel is located the bottom that second ladle one end was kept away from to female dust excluding hood, first driving piece is connected with the action wheel transmission formula.

The gyro wheel is connected in female dust excluding hood bottom in one, and the gyro wheel is connected with the guide rail cooperation, be the motion under the injecing of guide rail, the gyro wheel divide into action wheel and follow driving wheel, wherein set up in the one end direction that female dust excluding hood is close to the second ladle from the driving wheel, the action wheel sets up in the one end direction that the second ladle was kept away from to female dust excluding hood, first driving piece then the transmission is connected on the action wheel, first driving piece can be if gear motor isotructure, through the structure of this scheme, can reduce the influence that first driving piece received high temperature load, prolong its effective life.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the primary and secondary type movable dust hood vehicle of the utility model can more comprehensively cover the space above two ladles when the ladle is poured through the arrangement of the secondary dust hoods, thereby achieving higher dust removal effect, and the secondary dust hoods can do telescopic motion, and the interference to the movement tracks of the ladles and the crane can be avoided by withdrawing the secondary dust hoods before and after the ladle pouring, so that the ladle pouring system can normally run;

(2) the primary and secondary type movable dust hood vehicle of the utility model adopts the rack transmission form to drive the secondary dust hood to move, has high transmission efficiency and accurate transmission ratio, can avoid the phenomenon that the frame-shaped secondary dust hood is blocked in the moving process, ensures the effective shielding of the secondary dust hood above the ladle in the tank-pouring process, and ensures the dust removal effect;

(3) the primary and secondary type movable dust hood vehicle of the utility model provides a stable motion track for the secondary dust hood through the matching structure of the supporting guide rail and the second roller, and the matching structure supports the weight of the secondary dust hood, thereby avoiding the accurate transmission caused by the influence of overlarge load when the gear and rack is in transmission;

(4) the primary and secondary type mobile dust hood vehicle of the utility model can limit the moving limit position of the secondary dust hood through the arrangement of the end plate, so as to prevent the secondary dust hood from rushing out of the supporting guide rail to cause potential safety hazard under the condition of driving unit failure or inertia;

(5) the primary and secondary type mobile dust hood vehicle of the utility model has the similar vehicle blocking effect and the similar end plate effect, and is arranged at the two ends of the guide rail, thereby preventing the potential safety hazard caused by the fact that the guide rail is rushed out in the moving process of the primary dust hood;

(6) the primary and secondary type movable dust hood vehicle of the utility model has the advantages that the first driving piece and the driving wheel are connected and arranged at the bottom of one end far away from the second ladle in a transmission way, thereby reducing the influence of high temperature load on the first driving piece and prolonging the effective service life of the first driving piece;

(7) the utility model discloses simple structure, reasonable in design easily makes.

Drawings

FIG. 1 is a schematic view of a conventional molten iron transfer environment;

FIG. 2 is a schematic view of the primary and secondary mobile dust hood vehicle of the present invention applied to a tank-dumping environment;

FIG. 3 is a schematic view of the primary-secondary type mobile dust hood vehicle of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is a side view of the child-mother type mobile dust excluding hood vehicle of the present invention;

FIG. 6 is an enlarged view of FIG. 5 at B;

fig. 7 is an enlarged view of fig. 5 at C.

In the figure:

1000. a pit; 2000. a first ladle; 3000. a second ladle;

1. a guide rail;

2. a primary dust hood;

3. a first drive unit; 30. a first driving member; 31. roller 1

4. A sub dust hood;

5. a second driving unit; 50. a second driving member; 51. a gear; 52. a rack; 53. supporting the guide rail; 54. a second roller; 55. an end plate;

6. a dust removal pipe;

7. a sealing system; 70. a first sealing plate; 71. a second sealing plate.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings.

Example 1

As shown in fig. 1, 2 and 3, the primary and secondary mobile dust hood vehicle of the present embodiment includes,

a pit 1000, a first ladle 2000 disposed in the pit 1000, and a second ladle 3000 disposed on the ground beside the pit 1000;

the guide rails 1 are laid on the ground on two sides of the pit 1000;

the main dust hood 2 is a three-surface shielding type hood body and is movably connected to the guide rail 1;

the first driving unit 3 drives the primary dust hood 2 to reciprocate on the guide rail 1;

the dust removal pipe 6 is communicated with the primary dust removal cover 2;

further comprising:

the secondary dust hood 4 is a frame-shaped hood body and is movably connected to the upper part of the main dust hood 2;

and a second driving unit 5 for driving the sub dust excluding hood 4 to reciprocate in the direction of the second ladle 3000.

The blast furnace molten iron tank is not matched with the steel-making molten iron tank, so a ladle transfer system is required to be arranged to transfer molten iron, as shown in fig. 1, the arrangement structure is a common pit type ladle transfer system, a first ladle 2000 is arranged in a pit, a second ladle 3000 which is transported by a train and is full of molten iron is arranged at the tail part of the second ladle 3000 by a crane hook, the second ladle is leaned against an upper tilting support, the molten iron is poured into the first ladle 2000, a large amount of smoke and molten iron splashing can be inevitably generated in the pouring process, therefore, a dust removing cover is necessary to remove dust and block the splashing, while the existing dust removing device is arranged, the smooth tilting of the second ladle 3000 and the convenience of the crane hook are considered, so the concession is made in the shielding range, a large amount of smoke and dust escape and molten iron splashing still exist in the ladle transfer process, and the safe production is influenced, the embodiment improves the structure of the dust removing device.

The guide rails 1 are laid on the ground on both sides of the pit 1000, and the guide rails 1 may be laid along the direction pointing to the second ladle 3000, or may be laid in the direction perpendicular to the previous laying method, and the first laying direction is adopted in this embodiment, as shown in fig. 2;

the female dust hood 2 is a three-surface shielding type hood body commonly used for dust removal, the top surface and two side surfaces of the female dust hood are shielded, the surface facing the second ladle 3000 is open for the second ladle 3000 to normally tip, the surface far away from the second ladle 3000 is provided with a hole for connecting the dust removal pipe 6, and the dust removal pipe 6 is communicated with dust removal equipment so as to timely suck out dust and remove dust;

the first driving unit 3 is used for providing power for the female dust hood 2 and is a unit for enabling the female dust hood 2 to move on the guide rail 1, in the embodiment, the first driving unit 3 is arranged at the bottom of the female dust hood 2, the female dust hood 2 is arranged on the guide rail 1 in a matched mode through the first driving unit 3, and the female dust hood 2 moves close to or away from the second ladle 3000 along the laying direction of the guide rail 1;

the secondary dust hood 4 is a key part for solving the technical problem, the secondary dust hood 4 is in the shape of an Jiong-shaped frame which is as same as the upper half part of the primary dust hood 2 and is movably connected to the upper part of the primary dust hood 2, more specifically, the secondary dust hood 4 is movably connected to the upper part of the primary dust hood 2 close to the second ladle 3000, and the secondary dust hood 4 can move close to or away from the second ladle 3000 under the driving of the second driving unit 5; when the ladle is poured, the hook of the crane needs to hook the tail of the second ladle 3000 for tilting, at this time, the first driving unit 3 drives the primary dust hood 2 to move along the guide rail 1 to the position right above the pit 1000, at this time, the secondary dust hood 4 is located at a position far away from the second ladle 3000, so that a sufficient space is left between the primary dust hood 2 and the second ladle 3000 for the crane hook and the ladle to tilt, when the second ladle 3000 tilts, after a ladle opening enters the cover body space of the primary dust hood 2, under the driving of the second driving unit 5, the secondary dust hood 4 moves towards the second ladle 3000 to shield most of the space above the tilted second ladle 3000, when the second ladle 3000 tilts molten iron, the space right above the two ladle openings is completely covered by the primary dust hood 2 and the secondary dust hood 4, therefore most of the dust and the splashed molten iron are finally dedusted by the dust removal pipe 6 under the blocking of the cover bodies, reach high dust removal effect, when empting the back that finishes, sub-dust excluding hood 4 is withdrawed to second drive unit 5, and second ladle 3000 resets, and first drive unit 3 withdraws female dust excluding hood 2 after the can transfer finishes.

The dust excluding hood car is removed to primary and secondary formula of this embodiment, through the setting of sub dust excluding hood, when carrying out the reladling, can carry out more comprehensive cover to the space of two ladle tops, reach higher dust removal effect, and sub dust excluding hood 4 can concertina movement, avoids taking place to interfere the movement track of ladle, crane through withdrawing sub dust excluding hood 4 around the reladling, makes the reladling system normal operating.

Example 2

As shown in fig. 4, 5 and 6, the child-mother type mobile dust hood vehicle of the present embodiment is further improved on the basis of embodiment 1, wherein the second driving unit 5 is disposed on two sides of the primary dust hood 2 and the secondary dust hood 4, and includes:

a second driving member 50 providing a driving force;

a gear 51 connected with the sub dust hood 4 and in transmission connection with the second driving member 50;

and the racks 52 are horizontally fixed on two sides of the mother dust hood 4, and the racks 52 are meshed with the gear 51.

In this embodiment, second driving piece 50 can be the component that can provide power for gear motor etc., this embodiment adopts rack gear's mode to realize the removal of sub-dust excluding hood 4, specifically do, rack 52 level is fixed in female dust excluding hood 4 both sides, gear 51 and the meshing of 2 both sides bottom fixed connection of sub-dust excluding hood and gear 51 and rack 52, gear motor is connected with gear 51 transmission, start when gear motor, drive gear 52 and rotate, under meshing mechanism's effect, gear 51 walks on rack 52, drive sub-dust excluding hood 4 from this and move on female dust excluding hood 2.

In this embodiment, the rack transmission form is adopted to drive the sub dust excluding hood 4 to move, the transmission efficiency is high, the transmission ratio is accurate, after the transmission mechanism is arranged on two sides of the sub dust excluding hood 4, under the condition that the output power of the gear motors on two sides is the same, the two sides of the sub dust excluding hood 4 can be guaranteed to move at the same moving speed moving distance, so that the phenomenon that the frame-shaped sub dust excluding hood 4 is blocked in the moving process is avoided, the effective shielding of the sub dust excluding hood 4 above the ladle in the ladle transferring process is ensured, and the dust removing effect is ensured.

Example 3

As shown in fig. 6 and 7, the child-mother type mobile dust hood vehicle of the present embodiment is further improved on the basis of embodiment 2, and the second driving unit 5 further includes:

the support guide rails 53 are horizontally fixed on two sides of the mother dust hood 2, and the support guide rails 53 are C-shaped rails;

and the second roller 54 is connected with the sub dust hood 4, and the second roller 54 is matched and arranged in the supporting guide rail 53.

This embodiment has set up the structure of support and guide effect to sub dust excluding hood 4, the support guided way 53 level that is the C type is fixed in 4 both sides of female dust excluding hood, two 54 fixed connection of gyro wheel in 4 both sides of sub dust excluding hood, and two 54 cooperations of gyro wheel arrange in support guided way 53, under the limit of this structure, make sub dust excluding hood 4 have stable motion trail, and two 54 of gyro wheel and the weight of the sub dust excluding hood 4 of support guided way 53 cooperation support, it influences its accurate transmission to prevent to receive too big load accelerated wear between gear 51 rack 52 among the rack gear.

Example 4

As shown in fig. 4, the child-mother type mobile dust hood vehicle of the present embodiment is further improved on the basis of embodiment 3, wherein end plates 55 are fixedly connected to two ends of the support guide rail 53, so as to close two ends of the support guide rail 53.

By means of the arrangement of the end plate 55, the limit position of the movement of the sub dust hood 4 can be limited, so that the sub dust hood 4 is prevented from rushing out of the support guide rail 53 to cause potential safety hazards under the condition of driving unit failure or inertia.

Example 5

The primary and secondary type mobile dust hood vehicle of the embodiment is further improved on the basis of the embodiment 4, and vehicle stoppers are arranged at two ends of the guide rail 1 in an upward protruding manner.

The car keeps off the effect similar with end plate 55 effect in this embodiment, sets up at 1 both ends of guide rail, prevents that female dust excluding hood 2 from removing the in-process and rushing out guide rail 1 and cause the potential safety hazard.

Example 6

As shown in fig. 5, the primary and secondary mobile dust hood vehicle of the present embodiment is further improved on the basis of embodiment 5, and the first driving unit 3 includes:

a first driving member 30 providing a driving force;

the first roller 31 is connected with the bottom of the primary dust hood 2 and supports the primary dust hood 2 to move on the guide rail 1;

the first roller 31 is divided into a driven wheel and a driving wheel, the driving wheel is located at the bottom of the mother dust excluding hood 2 far away from one end of the second ladle 3000, and the first driving piece 30 is in transmission connection with the driving wheel.

The present embodiment is a structural form of the first driving unit 30, the first roller 31 is connected to the bottom of the female dust excluding hood 2, and the first roller 31 is connected to the guide rail 1 in a matching manner, and moves under the limitation of the guide rail 1, the first roller 31 is divided into a driving wheel and a driven wheel, wherein the driven wheel is disposed at one end direction of the female dust excluding hood 2 close to the second ladle 3000, the driving wheel is disposed at one end direction of the female dust excluding hood 2 far away from the second ladle 3000, the first driving member 30 is connected to the driving wheel in a transmission manner, the first driving member 30 can be in a structure such as a speed reduction motor, and through the structure of the present embodiment, the influence of high temperature load on the first driving member 30 can be reduced, and.

Further, this embodiment still is equipped with sealing system 7, it includes two first closing plates 70 and a second closing plate 71, wherein, second closing plate 71 is vertical to be located the bottom that female dust excluding hood 2 kept away from 3000 one end of second ladle, seal the space between female dust excluding hood 2 bottom and ground, two first closing plates 70 are vertical to be located female dust excluding hood 2 both sides bottom downwards, and be located two guide rails 1 inboards, seal the space between female dust excluding hood 2 bottom and ground, through first closing plate 70 and second closing plate 71, seal the space between female dust excluding hood 2 and ground, prevent that the in-process smoke and dust molten iron from escaping from the space and under the sheltering from of two first closing plates 70, effectively prevented that the in-process molten iron of reladling splashes to guide rail 1 and first drive unit 3 on, ensured the effective life of this device.

The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.

Claims (6)

1. A primary-secondary type movable dust hood vehicle, which comprises,

a pit (1000), a first ladle (2000) placed in the pit (1000), and a second ladle (3000) placed on the ground beside the pit (1000);

the guide rails (1) are laid on the ground on two sides of the pit (1000);

the main dust hood (2) is a three-surface shielding type hood body and is movably connected to the guide rail (1);

the first driving unit (3) drives the primary dust hood (2) to reciprocate on the guide rail (1);

the dust removal pipe (6) is communicated with the primary dust removal cover (2);

it is characterized by also comprising:

the secondary dust hood (4) is a frame-shaped hood body and is movably connected to the upper part of the main dust hood (2);

and a second driving unit (5) which drives the sub dust removing hood (4) to reciprocate along the direction of the second ladle (3000).

2. The primary and secondary mobile dust hood vehicle as claimed in claim 1, wherein the second driving unit (5) is disposed on both sides of the primary dust hood (2) and the secondary dust hood (4), and comprises:

a second drive member (50) providing a driving force;

a gear (51) which is connected with the sub dust hood (4) and is in transmission connection with the second driving piece (50);

and the racks (52) are horizontally fixed on two sides of the mother dust hood (2), and the racks (52) are meshed with the gear (51).

3. A primary and secondary mobile dust hood vehicle according to claim 2, wherein said second drive unit (5) further comprises:

the support guide rails (53) are horizontally fixed on two sides of the mother dust hood (2), and the support guide rails (53) are C-shaped rails;

and the second roller (54) is connected with the sub dust hood (4), and the second roller (54) is matched and arranged in the supporting guide rail (53).

4. The primary and secondary mobile dust hood vehicle as claimed in claim 3, wherein: end plates (55) are fixedly connected to two ends of the supporting guide rail (53) to seal two ends of the supporting guide rail (53).

5. The primary and secondary mobile dust hood vehicle of claim 1, wherein: and car stops are arranged at the two ends of the guide rail (1) in an upward protruding manner.

6. A primary and secondary mobile dust hood vehicle according to claim 1, characterized in that said first drive unit (3) comprises:

a first drive member (30) providing a driving force;

the first roller (31) is connected with the bottom of the primary dust hood (2) and supports the primary dust hood (2) to move on the guide rail (1);

the first roller (31) is divided into a driven wheel and a driving wheel, the driving wheel is located at the bottom of one end, away from the second ladle (3000), of the mother dust hood (2), and the first driving piece (30) is in transmission connection with the driving wheel.

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