CN213229941U - Dust device for powder tank - Google Patents

Abstract

The utility model relates to a dust device for powder jar, it includes the powder jar, powder tank deck portion intercommunication has the inlet pipe, it leads the dirt pipe to still communicate on the powder jar, it is close to the inlet pipe position with the intercommunication department of powder jar to lead the dirt pipe, the one end intercommunication that the powder jar was kept away from to lead the dirt pipe has the separator box, it is provided with the air exhauster on the dirt pipe to lead, the gas vent has been seted up to separator box one side, gas vent department is provided with the filter membrane, separator box bottom intercommunication has the case that gathers materials, the separator box is provided with first switch with the intercommunication department of case that gathers materials, it pushes away the material subassembly to be provided with the second switch in the case that. This application has the effect of carrying out effective utilization to cement granule in the dust.

Description

Dust device for powder tank

Technical Field

The application relates to the field of concrete powder jar, especially relates to a dust device for powder jar.

Background

Concrete is a general name of engineering composite materials formed by cementing aggregate into a whole by cementing materials, and the raw materials of the concrete generally comprise cement, sandstone, fly ash, additives and water. When concrete production, generally store cement, fly ash, grit etc. in the powder jar, then export the stirring department from the powder jar and add the water stirring, the transport vechicle comes the raw materials transportation, transports the raw materials in the transport vechicle to the powder jar through the mode that adds atmospheric pressure, and the raw materials gets into the in-process in the powder jar and can produce the dust, and the dust can the polluted environment in getting into the air.

The existing Chinese patent with reference to the public number CN209502528U discloses a dust removal system for a concrete mixing plant, which comprises a mixing tank, wherein one side of the mixing tank is communicated with an air supply fan, the other side of the mixing tank is communicated with a separation box, one side of the separation box is embedded with a filter screen, the outer side of the mixing tank is also provided with a dust collection box, the dust collection box is communicated with the separation box through a guide pipe, the bottom of the dust collection box is rotationally connected with a discharge rotary plate through a rotary shaft, the air supply fan is started to supply air into the mixing tank, the air with dust enters the separation box under the action of the air supply fan, the air with dust is separated and discharged after being filtered by the filter screen arranged at one side of the separation box, meanwhile, due to the action of air flow and gravity, the dust falls into the bottom of the separation box and enters the interior of the dust collection box for collection, and the separation and collection of the air with dust are completed, when collected dust needs to be discharged, the discharging rotary plate is opened, and the dust in the dust collection box can be discharged obliquely through the discharging rotary plate.

In view of the above-mentioned related art, the inventor believes that the dust contains raw materials such as cement particles, the dust is collected in the dust box and then discharged from the dust box, and the cement particles in the dust are not fully utilized, which results in waste of cement.

Disclosure of Invention

For the cement granule in the effectual utilization dust, this application provides a dust device for powder jar.

The application provides a dust device for powder tank adopts following technical scheme:

a dust fall device for a powder tank comprises the powder tank, the top of the powder tank is communicated with a feeding pipe, the powder tank is also communicated with a dust guide pipe, the communication position of the dust guide pipe and the powder tank is positioned at the position of the powder tank close to the feeding pipe, one end of the dust guide pipe far away from the powder tank is communicated with a separation box, the dust guide pipe is provided with an exhaust fan, one side of the separation box is provided with an exhaust port, the exhaust port is provided with a filter membrane, the bottom of the separation box is communicated with a material collection box, the communication position of the separation box and the material collection box is provided with a first switch, a material pushing assembly is arranged in the material collection box and, the material return pipe is located in the material collecting box and is abutted to the bottom wall of the material collecting box, the material return pipe is communicated to the side wall of the material collecting box, the pipe opening of the material return pipe is right opposite to the material push plate, one end, far away from the material collecting box, of the material return pipe is communicated to the material inlet pipe, a second switch is arranged on the material return pipe, and a driving cylinder capable of driving the material push plate to move horizontally is fixedly connected to one side, far away from the material return pipe.

By adopting the technical scheme, the first switch is turned on, the second switch is turned off, raw materials such as cement are conveyed into the powder tank from the feeding pipe under the action of wind pressure, dust is generated in the falling process of the raw materials in the powder tank, the exhaust fan is started, dust-carrying gas in the powder tank enters the separation box through the dust guide pipe under the action of the exhaust fan, air can be filtered through a filter membrane arranged on one side of the separation box and then is discharged, meanwhile, due to the action of airflow and gravity, the dust falls into the bottom of the separation box and then enters the material collection box to be accumulated at the bottom of the material collection box, the material pushing plate is positioned in the position, far away from the material return pipe, of the dust collection box, when the dust in the dust collection box is accumulated to a certain degree, the first switch is turned off, the second switch is turned on, the driving cylinder is started, the material pushing plate pushes the dust in the material collection box to move, the raw materials in the feeding pipe enter the powder tank together, cement particles in dust enter the powder tank again to be utilized, cement waste is reduced, after the dust in the collecting tank is completely pushed into the feeding pipe, the driving cylinder is started to drive the material pushing plate to return to the original position, the second switch is closed, the first switch is opened, and the second switch is closed to stop wind in the feeding pipe from entering the collecting tank from the material return pipe to blow the dust in the collecting tank to fly.

Preferably, first switch includes conveying pipeline and locking rope, and conveying pipeline one end communicates in the separator box bottom, and the one end that the separator box was kept away from to the conveying pipeline communicates in the case that gathers materials, and the conveying pipeline is flexible material, is provided with the locking rope on the conveying pipeline.

Through adopting above-mentioned technical scheme, when needs close first switch, with the locking rope on the conveying pipeline tight can, when needs open first switch, with the locking rope untie can for opening and shutting convenient and fast of first switch, and first switch is opening and close the in-process, all can not produce the leakage of dust.

Preferably, the conveying pipe comprises an inner pipe and an outer pipe, the locking rope is located between the outer pipe and the inner pipe, and two ends of the locking rope penetrate through the outer pipe and are arranged outside the conveying pipe.

Through adopting above-mentioned technical scheme, the locking rope is connected in the conveying pipeline for it is more convenient when the locking rope uses, avoids the locking rope to lose simultaneously.

Preferably, the two ends of the conveying pipe are connected with fixing rings, external threads are formed in the fixing rings, and internal threads matched with the threads on the fixing rings are formed in the separating box, the dust collecting box and the conveying pipe material barrel.

Through adopting above-mentioned technical scheme, when the conveying pipeline need be changed, rotate solid fixed ring, make solid fixed ring and separator box and the separation of the workbin that gathers materials, change for new conveying pipeline, then will gu fixed ring and separator box and the workbin that gathers materials is connected for the change convenient and fast of conveying pipeline.

Preferably, the second switch includes baffle and storage tank, and the inner wall at feed back pipe roof is seted up to the storage tank, and the storage tank begins to extend along the direction of motion of dust in being on a parallel with the feed back pipe to the direction of keeping away from the inlet pipe from feed back pipe and inlet pipe butt, and the baffle rotates to be connected in the storage tank and is close to the lateral wall of the case that gathers materials, the direction of motion of the interior dust of axis of rotation level and perpendicular to feed back pipe of baffle, and when the baffle was in vertical state, the baffle was full of the feed back pipe inner chamber, and when the baffle was in the hori.

By adopting the technical scheme, when the material pushing plate pushes the dust in the material collecting box to move towards the material returning pipe under the action of the driving cylinder, the dust can push the baffle plate to enable the baffle plate to rotate, the baffle plate continues to rotate along with the continuous movement of the material pushing plate until the baffle plate is completely arranged in the containing groove, the material pushing plate continues to move until the dust completely enters the feeding pipe, the baffle plate is arranged in the containing groove, the material pushing plate can not fall off from the containing groove under the blocking action of dust and the material pushing plate, after the material pushing is finished, the driving cylinder is started to drive the material pushing plate to move to the original position, when the material pushing plate moves to be not abutted against the baffle plate, the baffle plate can rotate to be abutted against the bottom wall of the material return pipe under the action of the self gravity, the baffle can realize the closure and open to the feed back pipe along with the motion of scraping wings, does not need artificial the opening and closing of carrying on the second switch for the feed back process is convenient and fast more.

Preferably, the hinge is arranged at the joint of the baffle and the side wall of the accommodating groove, the hinge is embedded in the side wall of the accommodating groove and the baffle, the side face, close to the baffle, of the hinge in the accommodating groove is coplanar with the side wall of the accommodating groove, and the side face, close to the accommodating groove, of the hinge on the baffle is coplanar with the side face of the baffle.

Through adopting above-mentioned technical scheme, the design is established in the hinge inlays for when the baffle is located the storage tank the gap between baffle and the storage tank lateral wall reduces, reduces the dust and enters into the probability in the storage tank from the gap between baffle and the storage tank lateral wall, makes more dust enter into the feed back pipe and then utilized, further reduces the waste of cement in the dust.

Preferably, the fixed slot has been seted up to feed back pipe diapire, and vertical sliding connection has the fixed block in the fixed slot, and when the baffle was in vertical state, one side looks butt that the inlet pipe was kept away from to fixed block and baffle, fixed block bottom fixedly connected with can drive the fixed cylinder of the vertical removal of fixed block, and fixed cylinder is located the feed back outside of the tubes.

By adopting the technical scheme, when the baffle is in a state of abutting against the bottom wall of the material return pipe, the air in the feeding pipe can enter the material return pipe, the fixed block prevents the baffle from rotating under the action of wind power, so that the air is prevented from entering the material collecting box from the material return pipe to blow dust in the material collecting box, the dust in the material collecting box is accumulated to a certain degree, a certain amount of dust can move to abut against the baffle, the baffle cannot rotate under the pushing action of the dust due to the action of the wind in the feeding pipe on the baffle, when pushing material is required, the fixed cylinder is started, the fixed cylinder drives the fixed block to move to the upper surface of the fixed block and the coplanar of the inner wall of the material return pipe along the direction parallel to the axis direction of the powder material tank and far away from the baffle, and the fixed cylinder is started to drive the fixed block to return.

Preferably, the inner wall of the fixing groove is provided with a sealing gasket.

Through adopting above-mentioned technical scheme, set up sealed pad in the fixed slot and can block that the dust in the feed back pipe leaves the feed back pipe from the fixed slot, avoid the dust to get into external environment and cause the pollution, make more dust get into the feed back pipe then utilized simultaneously, further reduce the waste of cement in the dust.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the material return pipe, dust enters the powder tank again, so that the cement in the dust is recycled, and the waste of the cement is reduced;

2. the fixing ring is arranged, so that the material conveying pipe is convenient and quick to replace;

3. through setting up the fixed block, avoid the interior wind of charge-in pipe to enter into the case that gathers materials.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

FIG. 2 is a sectional view of the embodiment with the powder tank and the feed pipe hidden, taken along the axis of the feed delivery pipe.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2.

Fig. 4 is a sectional view showing the fixing ring.

Fig. 5 is a sectional view showing the hinge.

Description of reference numerals: 1. a powder tank; 11. a feed pipe; 12. a dust guide pipe; 121. an exhaust fan; 2. a separation tank; 21. filtering the membrane; 22. a delivery pipe; 221. an outer tube; 222. an inner tube; 23. a fixing ring; 24. a locking rope; 3. a material collecting box; 4. a material pushing assembly; 41. a material pushing plate; 42. a driving cylinder; 43. a material return pipe; 431. a baffle plate; 432. a containing groove; 433. a hinge; 434. a fixed block; 435. fixing the air cylinder; 436. fixing grooves; 437. and a gasket.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses dust device for powder tank. Referring to fig. 1 and 2, the dust falling device for the powder tank comprises a powder tank 1, a feeding pipe 11 for conveying materials into the powder tank 1 is communicated with the top of the powder tank 1, a dust guide pipe 12 is communicated with the outside of the powder tank 1, the communication position of the dust guide pipe 12 and the powder tank 1 is positioned at the position close to the top of the powder tank 1, an exhaust fan 121 is connected in the dust guide pipe 12, one end of the dust guide pipe 12, which is far away from the powder tank 1, is communicated with a separation box 2, the separation box 2 can separate dust-containing gas, the bottom of the separation box 2 is communicated with a material collection box 3, a material pushing component 4 is arranged in the material collection box 3, the material pushing component 4 is communicated with the material collection box 3 and the feeding pipe 11, the material pushing component 4 can convey the dust in the material collection box 3 back to the feeding pipe 11, the feeding pipe 11 conveys the cement and other raw materials into the powder tank 1, the raw materials can generate dust in the falling process in the powder tank, after the separation of the separation box 2, the dust enters the material collection box 3, the dust in the material collection box 3 enters the feeding pipe 11 under the action of the material pushing assembly 4 and reenters the powder tank 1 along with the raw material in the feeding pipe 11, so that the cement particles in the dust are reused, and the waste of cement is reduced.

Referring to fig. 2, separator box 2 fixed connection has been seted up in powder jar 1, separator box 2 one side gas vent, and gas vent department is provided with filter membrane 21, and dirty gas gets into separator box 2 after, the air passes through filter membrane 21 and filters the back and discharges, because the effect of air current and gravity, the dust continues downstream and gets into case 3 that gathers materials, realizes the separation of dust and air in the dirty gas, discharges the air, avoids causing environmental pollution in the dust gets into the environment.

Referring to fig. 4, separator box 2 and 3 intercommunications departments of case that gathers materials are provided with first switch, first switch includes conveying pipeline 22 and locking rope 24, conveying pipeline 22 one end communicates in separator box 2 bottom, the one end that separator box 2 was kept away from to conveying pipeline 22 communicates in case 3 that gathers materials, conveying pipeline 22 both ends bond and have solid fixed ring 23, gu be provided with the external screw thread on the fixed ring 23, be provided with on separator box 2 and the case 3 that gathers materials and go up the internal thread of external screw thread adaptation with solid fixed ring 23, the material of conveying pipeline 22 is polyurethane, conveying pipeline 22 includes outer tube 221 and inner tube 222, outer tube 221 is provided with locking rope 24 before inner tube 222, and locking rope 24 both ends are passed outer tube 221 and are arranged in outside conveying pipeline. When needing to stop to arrange material in case 3 that gathers materials, it can to tie tightly locking rope 24, make the convenient and fast that opens and close of conveying pipeline 22, when conveying pipeline 22 needs to be changed, it makes solid fixed ring 23 and separator box 2 and case 3 separation that gathers materials to rotate solid fixed ring 23, change into new conveying pipeline 22, then it is connected with separator box 2 and case 3 that gathers materials to rotate solid fixed ring 23, make the change convenient and fast of conveying pipeline 22, new conveying pipeline 22 can avoid the dust to leak to the environment in, reduce environmental pollution, guarantee simultaneously that more dust enters into inlet pipe 11 through case 3 that gathers materials, then it is utilized to get into powder tank 1, increase the utilization ratio of cement in the dust, reduce the waste of cement.

Referring to fig. 2 and 5, the collecting box 3 is fixedly connected to the powder tank 1, the pushing assembly 4 includes a pushing plate 41, a driving cylinder 42, and a material return pipe 43, one end of the material return pipe 43 is communicated with the side wall of the collecting box 3, the inner wall of the bottom wall of the material return pipe 43 is coplanar with the inner wall of the bottom wall of the collecting box 3, one end of the material return pipe 43 far from the collecting box 3 is communicated with the material inlet pipe 11, the pushing plate 41 is located in the collecting box 3, the pushing plate 41 is abutted against the bottom wall of the collecting box 3, the pushing plate 41 is opposite to the opening of the material return pipe 43, the driving cylinder 42 is fixedly connected to one side of the pushing plate 41 far from the material return pipe 43, the driving cylinder 42 is located outside the collecting box 3, the driving cylinder 42 is fixedly connected to the powder tank 1, a second switch is disposed in the material return pipe 43, the second switch includes a baffle 431 and an accommodating groove 432, the accommodating groove 432 is disposed on the inner wall of the, and storage tank 432 does not run through the top wall of return pipe 43, baffle 431 is connected to the side wall of storage tank 432 near collecting box 3 in a rotating manner, the rotating axis of baffle 431 is horizontal and perpendicular to the movement direction of dust in return pipe 43, when baffle 431 is vertical, baffle 431 fills the inner cavity of return pipe 43, when baffle 431 is horizontal, baffle 431 is completely arranged in storage tank 432, hinge 433 is connected between baffle 431 and the side wall of storage tank 432, and hinge 433 is embedded in baffle 431 and the side wall of storage tank 432.

Referring to fig. 2 and 5, when the material collecting box 3 is fed, the material pushing plate 41 abuts against the side wall of the material collecting box 3 far from the material return pipe 43, when the dust in the material collecting box 3 is stored to be flush with the upper surface of the material pushing plate 41, the locking rope 24 is tightened, the driving cylinder 42 is started, the driving cylinder 42 drives the material pushing plate 41 to move towards the material return pipe 43, the material pushing plate 41 pushes the dust to move towards the material return pipe 43, after the dust enters the material return pipe 43 and abuts against the baffle 431, the baffle 431 is pushed by the dust to rotate towards the direction close to the top wall of the material return pipe 43 along with the continuous movement of the material pushing plate 41 until the dust is completely placed in the accommodating groove 432, when the material pushing plate 41 moves to the connection position of the material return pipe 43 and the material inlet pipe 11, the dust is completely sent to the material inlet pipe 11, at this time, the material pushing plate 41 still abuts against the, lose the effect of blockking of scraping wings 41, baffle 431 rotates under self action of gravity to with feed back pipe 43 diapire butt, with in the dust promoted inlet pipe 11 in the case 3 that gathers materials, the dust enters into powder jar 1 along with the raw materials in the inlet pipe 11 together for the cement granule in the dust can be utilized, increases the utilization ratio of cement in the dust, reduces the waste of cement.

Referring to fig. 3, a fixing groove 436 is formed in an inner bottom wall of the return pipe 43, the fixing groove 436 penetrates through a bottom wall of the return pipe 43, a fixing block 434 is vertically and slidably connected in the fixing groove 436, when the baffle 431 is vertical, the fixing block 434 abuts against one side of the baffle 431 away from the feed pipe 11, a fixing cylinder 435 for driving the fixing block 434 to vertically move is fixedly connected at the bottom of the fixing block 434, the fixing cylinder 435 is located outside the return pipe 43, a sealing gasket 437 is bonded in the fixing groove 436, when the material collection box 3 is fed, the fixing block 434 abuts against the baffle 431, wind in the feed pipe 11 enters the return pipe 43, the wind entering the return pipe 43 can prevent the baffle 431 from rotating under the action of accumulated dust, the fixing block 434 can prevent the baffle 431 from rotating under the action of wind force, the baffle 431 is ensured to be in a state of abutting against the return pipe 43, thereby preventing the wind from entering the material collection box 3, more dust can be pushed into the feeding pipe 11 by the material pushing plate 41 and then utilized, so that the waste of cement in the dust is further reduced; when pushing is needed, the fixing cylinder 435 is operated to enable the fixing block 434 to move in the direction away from the material return pipe 43 until the top surface of the fixing block 434 is coplanar with the inner surface of the bottom wall of the material return pipe 43, and after pushing is completed, the fixing cylinder 435 is operated to enable the fixing block 434 to return to the original position.

The implementation principle of the embodiment is as follows: the locking rope 24 is in a relaxed state, the fixed block 434 is in a state of abutting against the baffle 431, the exhaust fan 121 is started, the dust-containing gas in the powder tank 1 enters the separation tank 2 through the dust guide pipe 12 under the action of the exhaust fan 121, after the dust-containing gas enters the separation tank 2, air is filtered through the filter membrane 21 and then discharged, dust continues to move downwards until entering the collection tank 3 from the conveying pipe 22, the dust is accumulated in the collection tank 3, when the dust in the collection tank 3 is in the same plane with the upper surface of the material pushing plate 41, the locking rope 24 is tightened, the fixed cylinder 435 is operated to enable the top surface of the fixed block 434 to be in the same plane with the inner surface of the bottom wall of the material return pipe 43, the driving cylinder 42 is operated, the driving cylinder 42 pushes the dust to move towards the direction close to the material return pipe 43 through the material pushing plate 41, the dust gradually pushes the baffle 431 to rotate in the material return pipe, the operation drives actuating cylinder 42 and makes scraping wings 41 return to the normal position, and baffle 431 resumes under self action of gravity and returns with feed back pipe 43 diapire butt state, and operation fixed cylinder 435 makes fixed plate and baffle 431 butt, opens locking rope 24, transports powder jar 1 again after separating and collecting the processing with the dust in powder jar 1, has avoided the dust to cause environmental pollution in getting into the environment promptly, recycles the cement in the dust again, reduces the waste of cement.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a dust device for powder jar which characterized in that: comprises a powder tank (1), the top of the powder tank (1) is communicated with a feeding pipe (11), the powder tank (1) is also communicated with a dust guide pipe (12), the communication position of the dust guide pipe (12) and the powder tank (1) is positioned at the position of the powder tank (1) close to the feeding pipe (11), one end of the dust guide pipe (12) far away from the powder tank (1) is communicated with a separation box (2), an exhaust fan (121) is arranged on the dust guide pipe (12), one side of the separation box (2) is provided with an exhaust port, the exhaust port is provided with a filter membrane (21), the bottom of the separation box (2) is communicated with a material collection box (3), the communication position of the separation box (2) and the material collection box (3) is provided with a first switch, a material pushing assembly (4) is arranged in the material collection box (3), the material pushing assembly (4) comprises a material pushing plate (41), a driving cylinder (42) and a material return pipe (43), the material pushing plate, the material return pipe (43) is communicated with the side wall of the material collecting box (3), the pipe opening of the material return pipe (43) is opposite to the material pushing plate (41), one end, far away from the material collecting box (3), of the material return pipe (43) is communicated with the material inlet pipe (11), the material return pipe (43) is provided with a second switch, and a driving cylinder (42) capable of driving the material pushing plate (41) to move horizontally is fixedly connected to one side, far away from the material return pipe (43), of the material pushing plate (41).

2. The dust fall device for a powder tank of claim 1, characterized in that: first switch includes conveying pipeline (22) and locking rope (24), and conveying pipeline (22) one end communicates in separator box (2) bottom, and the one end that separator box (2) were kept away from in conveying pipeline (22) communicates in case (3) that gathers materials, and conveying pipeline (22) are flexible material, are provided with locking rope (24) on conveying pipeline (22).

3. The dust fall device for a powder tank of claim 2, characterized in that: the conveying pipe (22) comprises an inner pipe (222) and an outer pipe (221), the locking rope (24) is located between the outer pipe (221) and the inner pipe (222), and two ends of the locking rope (24) penetrate through the outer pipe (221) and are arranged outside the conveying pipe (22).

4. The dust fall device for a powder tank of claim 2, characterized in that: conveying pipeline (22) both ends are connected with solid fixed ring (23), have seted up the external screw thread on solid fixed ring (23), separator box (2) and collection workbin (3) and conveying pipeline (22) feed cylinder department offer with the internal thread of solid fixed ring (23) upper thread adaptation.

5. The dust fall device for a powder tank of claim 1, characterized in that: the second switch comprises a baffle plate (431) and a containing groove (432), the containing groove (432) is formed in the inner wall of the top wall of the material return pipe (43), the containing groove (432) extends from the abutting position of the material return pipe (43) and the material inlet pipe (11) along the direction parallel to the movement direction of dust in the material return pipe (43) to the direction far away from the material inlet pipe (11), the baffle plate (431) is rotatably connected to the side wall of the containing groove (432) close to the material collecting box (3), the rotation axis of the baffle plate (431) is horizontal and perpendicular to the movement direction of the dust in the material return pipe (43), when the baffle plate (431) is in a vertical state, the baffle plate (431) is filled in the inner cavity of the material return pipe (43), and when the baffle plate (431) is in a horizontal state.

6. The dust fall device for a powder tank of claim 5, wherein: the hinge (433) is arranged at the connecting position of the baffle (431) and the side wall of the accommodating groove (432), the hinge (433) is embedded in the side wall of the accommodating groove (432) and the baffle (431), the side face, close to the baffle (431), of the hinge (433) in the accommodating groove (432) is coplanar with the side wall of the accommodating groove (432), and the side face, close to the accommodating groove (432), of the hinge (433) on the baffle (431) is coplanar with the side face of the baffle (431).

7. The dust fall device for a powder tank of claim 5, wherein: fixed slot (436) have been seted up to feed back pipe (43) diapire, vertical sliding connection has fixed block (434) in fixed slot (436), and when baffle (431) were in vertical state, one side looks butt of inlet pipe (11) was kept away from with baffle (431) fixed block (434), fixed block (434) bottom fixedly connected with can drive fixed block (434) vertical movement's fixed cylinder (435), and fixed cylinder (435) are located outside feed back pipe (43).

8. The dust fall device for a powder tank of claim 7, wherein: and a sealing gasket (437) is arranged on the inner wall of the fixing groove (436).

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