CN205400747U - Remote dustless concrete sprayer - Google Patents

Abstract

The utility model provides a long-distance dust-free concrete spraying machine, which belongs to the technical field of concrete spraying equipment used in underground coal mines, and aims to solve the problems of short spraying distance and high rebound rate of the existing spraying machine, and to improve the existing spraying machine. The structure of the material part is improved, and the conical feeder is selected, and at least two rotor cups are arranged at equal intervals on the surface of the feeding rotor with a cylindrical structure or a conical structure, and the sealing between the feeding rotor and the feeding housing connection, the rotor material cup follows the rotation of the feed rotor and passes through the feed port, discharge port and residual air port of the feed housing in sequence, and when the rotor material cup gradually turns to the discharge port of the feed housing, the air supply port connects to the Rotor material cup, so that the material in the rotor material cup quickly enters the spraying part, the rotor material cup continues to rotate with the rotor, and then passes through the residual air port of the feeding shell, and discharges the residual air and residual material of the rotor material cup for convenience. The rotor cup continues to rotate to the feed inlet position to receive material from the hopper section again.

Description

Long-distance dust-free concrete sprayer

technical field

The utility model relates to a concrete jetting machine for underground coal mines, in particular to a long-distance dust-free concrete jetting machine.

Background technique

Concrete sprayer (shotcretemachine, concretesprayer) is a machine that uses compressed air to continuously transport concrete along the pipeline and spray it onto the construction surface. It is widely used in the lining construction of underground projects, shafts, tunnels, culverts, etc.

At present, most domestic coal mines use rotor-type concrete spraying machines, which can be divided into U-shaped chamber rotor-type concrete spraying machines (that is, top-discharging concrete spraying machines, representing the model PC5U) and straight-through rotor-type concrete spraying machines. The spraying machine (that is, the bottom discharge concrete spraying machine, representing the model PC6I) is mainly used for dry and wet concrete spraying operations, and the spraying distance is 100m horizontally and 30m vertically. The feeding part and the spraying part of the rotor concrete sprayer are arranged together (that is, it has only one material cavity, which is used for feeding and spraying at the same time), the seal is in a state of relative rotation during feeding and spraying, the sealing structure is unreliable, and It is easy to wear and tear to cause seal failure, the spraying distance cannot be guaranteed and a large amount of dust is generated. The frequency of the material chamber passing through the discharge port is low, the pulse is large during spraying, and the material cannot be continuous.

With the further improvement of the mechanization of coal mine excavation in our country, the increase of excavation and supporting equipment, the head-on operation environment of spraying is complicated, and there are higher requirements for the spraying distance of concrete spraying machines. On the other hand, my country has introduced relevant measures for coal mine dust control, strictly requiring that the dust concentration of spraying operations in coal mines should not be higher than 10mg/m3, and has begun to have higher requirements for the sealing reliability of concrete spraying machines. Therefore, designing a long-distance dust-free concrete spraying machine with the advantages of long spraying distance, less dust production, reliable sealing structure, long maintenance period, and low cost will become an important research and development work for concrete spraying operations in coal mines.

Contents of the invention

The technical task of the utility model is to solve the deficiencies of the prior art and provide a long-distance dust-free concrete sprayer.

The technical scheme that the utility model solves its technical problem adopts is:

A long-distance dust-free concrete spraying machine, including a trolley chassis, a hopper part, a feeding part and a material spraying part connected in sequence from top to bottom, and a power part that drives the feeding part and the material spraying part to work, the spraying material Part of it is fixedly arranged above the chassis of the trolley.

The feeding part includes a conical feeder, a dust removal system and an air system; the conical feeder includes a feeding housing and a feeding rotor, and the top of the feeding housing is provided with an inlet connected to the hopper part. Material port, the bottom of the feeding shell is provided with a discharge port connected to the spraying part, and the side of the feeding shell is provided with a residual air port connected to the dust removal system and an air supply port connected to the air circuit system; the feeding rotor is Cylindrical structure or frustum-shaped structure, the two end faces of the feeding rotor are respectively provided with rotating shafts, the central axes of the two rotating shafts are located on the same straight line, and the surface of the feeding rotor is provided with two or more rotor cups at equal intervals. The feeding rotor is placed horizontally inside the feeding housing, and there is a rubber seal between the surface of the feeding rotor and the inner wall of the feeding housing and an oil injection hole connected to the external lubrication system. The rotating shaft of the feeding rotor protrudes outward to feed The casing, the part where the rotating shaft protrudes from the feeding casing is further connected to the outer surface of the feeding casing through the sealing connection end face flange, and one of the rotating shafts of the feeding rotor is also connected to the power part; the hopper part is filled with materials, when the power part drives When the feeding rotor rotates, each rotor material cup passes through the feed port, discharge port and residual air port of the feed housing in sequence with the rotation of the feed rotor. Just passing through the rotor material cup of the feed port, when the rotor material cup gradually turns to the discharge port of the feeding shell, the air supply port is connected to the rotor material cup, so that the material in the rotor material cup quickly enters the spraying part, When the material in the rotor material cup is completely fed into the spraying part, the rotor material cup continues to rotate with the rotor, and then passes through the residual air port of the feeding housing to discharge the residual air and residual material of the rotor material cup.

The spraying part includes a spraying shell and a spraying rotor, the top of the spraying shell is open and connected to the discharge port of the feeding shell, so that a sealed structure is formed between the spraying shell and the feeding shell The side of the spray housing is provided with an air inlet connected to the air system and a discharge port connected to the external injection pipe; the cross section of the spray rotor is circular, and the axial section of the spray rotor is It is in the shape of a truncated cone or similar to a truncated cone, and the outer surface of the lower part of the spraying rotor is evenly distributed with a plurality of troughs that open outwards. The material falls from the feeding part on the upper outer surface of the spraying rotor, and further flows along the The upper outer surface of the upper part slides into a plurality of troughs on the lower outer surface of the spraying rotor; the central axis of the spraying rotor is connected to a drive shaft, and the drive shaft extends downward from the spraying housing and is connected to the power part. When the power part drives the spraying rotor to rotate, each trough rotates with the spraying rotor and passes through the discharge port of the spraying shell in turn, and the air inlet is above the material trough that just passes through the discharge port, so that the air inlet , the trough that just passes through the discharge port, and the discharge port are connected to form a U-shaped structure. The material discharged from the discharge port of the feeding shell enters the spraying chamber, and slides down the upper outer surface of the spraying rotor into the material trough of the spraying rotor. The system injects high-pressure gas horizontally through the air inlet to form a high-pressure environment in the spray chamber, and the high-pressure gas injected from the air inlet vertically blows the material in the trough downward to make it horizontally enter the outlet and further spray into the outside Spray tube for long-distance spraying.

Preferably, the number of the feeding cups is 2-4.

Further, the other rotating shaft of the feeding rotor protrudes outward from the feeding housing and is connected with a tensioning device, and the pressing force between the rubber seal and the feeding rotor can be adjusted by adjusting the tensioning device.

Preferably, the number of the troughs is 10-25.

Preferably, the power part is selected from hydraulic transmission or mechanical transmission.

Compared with the prior art, the long-distance dust-free concrete sprayer of the present utility model has the following beneficial effects:

1) The utility model has a reasonable design and a simple structure. The structure of the feeding part is improved, and a conical feeder is selected. Two or more rotor feeders are arranged at equal intervals on the surface of the feeding rotor with a cylindrical structure or a truncated conical structure. There is a sealed connection between the feeding rotor and the feeding shell. The rotor cup follows the rotation of the feeding rotor and passes through the feed port, discharge port and residual air port of the feeding shell in sequence, and gradually turns to the feeding When the discharge port of the material shell is used, the air supply port is connected to the rotor material cup, so that the material in the rotor material cup enters the spraying part quickly, and then, when the material in the rotor material cup is completely sent into the material spraying part, the rotor The material cup continues to rotate with the rotor, and then passes through the residual air port of the feeding shell to discharge the residual air and material of the rotor material cup, so that when the rotor material cup continues to rotate to the position of the material inlet, it can receive the material from the hopper again. The sealing effect of the whole feeding process is excellent, it can withstand high wind pressure without leakage, it can ensure the pressure stability of the lower injection part, and make preparations for increasing the injection distance;

2) To improve the structure of the injection part, the air inlet connected to the air system and the outlet connected to the external injection pipe are set on the injection shell. The selected injection rotor has a circular cross section, and the injection rotor The shaft section of the shaft is in the shape of a truncated cone or similar to a truncated cone, and the outer surface of the lower part of the spraying rotor is evenly distributed with a number of openings. The unique structure of the spraying rotor, when the material falls from the feeding part, falls The material on the outer surface of the upper part of the spraying rotor further slides along the upper outer surface of the spraying rotor into multiple material troughs on the lower outer surface of the material spraying rotor, and when the material troughs just rotate to the position of the discharge port, they are still located at the air inlet Below, the air inlet, the trough that just passes through the discharge port, and the discharge port are connected to form a U-shaped structure, and the spray chamber is a sealed structure. When the air system is transported from the air inlet to the spray chamber When the high-pressure gas is used, the spray chamber plays the role of maintaining pressure. The high-pressure gas injected from the air inlet blows the material in the trough vertically downward to make it horizontally enter the discharge port and further spray into the external injection pipe to realize the material Long-distance spraying, the maximum horizontal spraying distance can reach 700m;

3) Since the spraying rotor is circular and continuously and evenly distributed with multiple material grooves, the rebound rate is reduced and the spraying quality is improved when the rotating speed of the spraying rotor is constant.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is the structural sectional view of hydraulic system that the power part of the present utility model selects;

Accompanying drawing 3 is the enlarged structural sectional view of feeding part in the utility model;

Accompanying drawing 4 is the enlarged structural stereogram of feeding housing in the utility model;

Accompanying drawing 5 is the enlarged structural stereogram of feeding rotor in the utility model;

Accompanying drawing 6 is the magnified structural sectional view of spray material part in the utility model;

Accompanying drawing 7 is the front structural sectional view of spraying rotor in Fig. 6;

Accompanying drawing 8 is the top view of the structure of the spraying rotor in Fig. 6 .

Each label in the figure means:

1. Car chassis, 2. Hopper part, 3. Feeding shell, 4. Feeding rotor, 5. Feeding port,

6. Discharge port, 7. Excess air port, 8. Air supply port, 9. Rotor cup, 10. Rotary shaft,

11. Rubber seal, 12. Hydraulic system, 13. Spray shell, 14. Spray rotor,

15. Spray chamber, 16. Air inlet, 17. Discharge port, 18. Material trough, 19. Tensioning device,

20, air system, 21, drive shaft.

detailed description

Below in conjunction with accompanying drawing 1-8, the remote dust-free concrete sprayer of the present utility model is described in detail below.

In conjunction with accompanying drawings 1 and 2, the long-distance dust-free concrete sprayer of the present utility model has a structure comprising a trolley chassis 1 of a crawler structure, a hopper part 2, a feeding part and a material spraying part successively connected from top to bottom, and The power part that drives the feeding part and the material spraying part. The material spraying part is fixed above the chassis 1 of the trolley, and the power part adopts hydraulic transmission.

Again in conjunction with accompanying drawing 3,4,5, described feeding part comprises conical feeder, dedusting system and gas path system 20; Described conical feeder comprises feeding housing 3 and feeding rotor 4, described The top of the feed housing 3 is provided with a feed port 5 connected to the hopper part 2, the bottom of the feed housing 3 is provided with a discharge port 6 connected to the spraying part, and the side of the feed housing 3 is provided with a connected dust collector. The residual air port 7 of the system is connected to the air supply port 8 of the air circuit system 20; the feeding rotor 4 is a cylindrical structure or a circular truncated structure, and the two end faces of the feeding rotor 4 are respectively provided with rotating shafts 10, and the two rotating shafts 10 The central axis is located on the same straight line, the surface of the feeding rotor 4 is symmetrically provided with two rotor cups 9, the feeding rotor 4 is horizontally placed inside the feeding housing 3, and the surface of the feeding rotor 4 is in line with the feeding housing 3 There is a rubber seal 11 between the inner walls and an oil injection hole connected to the external lubrication system. The rotating shaft 10 of the feeding rotor 4 protrudes outward from the feeding housing 3, and the part of the rotating shaft 10 protruding from the feeding housing 3 is connected to the end face by the sealing method. The blue is further connected to the outer surface of the feeding housing 3, and one of the rotating shafts 10 of the feeding rotor 4 is also connected to the power part. The hopper part 2 is filled with materials. When the power part drives the feeding rotor 4 to rotate, the rotor material cup 9 follows the rotation of the feeding rotor 4 and passes through the feeding port 5, the discharging port 6 and the rest of the feeding housing 3 in sequence. Gas port 7, and when one of the rotor cups 9 faces upwards towards the feed port 5 of the feed housing 3, the other rotor cup 9 faces downwards towards the discharge port 6 of the feed housing 3. When the material falls from the feed port 5 of the feed shell 3 into the rotor cup 9 that just passes through the feed port 5, and the rotor cup 9 gradually turns to the discharge port 6 of the feed shell 3, the air supply port 8 is connected to the rotor material cup 9, so that the material in the rotor material cup 9 quickly enters the spraying part, and when the material in the rotor material cup 9 is completely sent into the material spraying part, the rotor material cup 9 continues to rotate with the rotor, and Then through the residual air port 7 of the feeding housing 3, the residual gas and residual material of the rotor material cup 9 are discharged.

In conjunction with accompanying drawings 6, 7, and 8, the spraying part includes a spraying housing 13 and a spraying rotor 14, and the top opening of the spraying housing 13 communicates with the discharge port 6 of the feeding housing 3, A spray chamber 15 with a sealed structure is formed between the spray housing 13 and the feed housing 3. The side of the spray housing 13 is provided with an air inlet 16 communicating with the air system 20 and an outlet communicating with the external injection pipe. Material opening 17; the cross-section of the material spraying rotor 14 is circular, the axial section of the material spraying rotor 14 is in the shape of a truncated cone or similar to a truncated cone, and the lower outer surface of the material spraying rotor 14 is evenly distributed with a plurality of openings outwards. Material trough 18, the material falls on the upper outer surface of the material spraying rotor 14 from the feeding part, and further slides along the upper outer surface of the material spraying rotor 14 to a plurality of material troughs 18 on the lower outer surface of the material spraying rotor 14; The central axis position of the material spraying rotor 14 is connected with a drive shaft 21, and the drive shaft 21 protrudes downward from the material spraying housing 13 and is connected to the power part. When the power part drives the material spraying rotor 14 to rotate, each trough 18 Rotate with the material spraying rotor 14 and pass through the material outlet 17 of the material injection housing 13 in sequence, and the air inlet 16 is above the material trough 18 that just passes through the material outlet 17, so that the air inlet 16, just through the material outlet 17 The hopper 18 and the discharge port 17 are connected in a U-shaped structure. The material discharged from the discharge port 6 of the feed housing 3 enters the spray chamber 15, and slides down the upper outer surface of the spray rotor 14 into the material trough 18 of the material spray rotor 14. When the material trough 18 turns to the air intake When the mouth 16 is directly below, the gas system 20 injects high-pressure gas horizontally through the air inlet 16, so that a high-pressure environment is formed in the spray chamber 15, and then the high-pressure gas blows the material in the trough 18 vertically downward to promote the material from the discharge chamber. Port 17 horizontally sprays into the external spray pipe to realize long-distance spray.

The other rotating shaft 10 of the feeding rotor 4 protrudes outwards from the feeding housing 3 and is connected with a tensioning device 19. By adjusting the tensioning device 19, the pressing force between the rubber seal 11 and the feeding rotor 4 can be adjusted. .

It should be noted that the utility model partially improves the structure of the feeding part and the spraying part on the basis of the existing structure, wherein the feeding rotor 4 is connected with the feeding housing 3 and the rotating shaft of the feeding rotor 4 10, the connection between the rotating shaft 10 and the power part of the feed housing 3, the feed rotor 4, and the drive shaft 21 of the material spraying rotor 14 and the power part are all prior art, and are arranged on the rotating shaft of the feed rotor 4 Tensioner 19 on 10 is also prior art.

In addition, in the utility model, when two rotor material cups 9 are provided on the feeding rotor 4, the two rotor material cups 9 alternately feed and discharge materials, and when one rotor material cup 9 feeds, the other rotor material cup 9 is just for discharge; when three or four rotor cups 9 are set on the feeding rotor 4, the three or four rotor cups 9 are fed and discharged in turn.

In addition, in the utility model, the feeding rotor 4 can be replaced by not only two rotating shafts 10, but also one through shaft.

In addition, the power part of the utility model can also select mechanical transmission.

In order to ensure the smoothness of spraying, during the rotation of the spraying rotor 14, the distance between two adjacent troughs 18 should not be too large, so that the two adjacent troughs 18 can communicate with the air inlet 16 and the Outlet 17.

In the description of the connection relationship of the present utility model, it should be noted that unless otherwise specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; may be mechanically connected, may also be electrically connected; may be directly connected, may also be indirectly connected through an intermediary, and may be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than limit the scope of protection of the utility model, although the specific embodiment part has described the utility model in detail, those of ordinary skill in the art It should be understood that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (6)

1. Long-distance dust-free concrete spraying machine, including the trolley chassis, the hopper part, the feeding part and the spraying part connected in sequence from top to bottom, and the power part that drives the feeding part and the spraying part to work. Part of it is fixed above the chassis of the trolley, and it is characterized in that the feeding part includes a conical feeder, a dust removal system and an air circuit system; The conical feeder includes a feeding housing and a feeding rotor, the top of the feeding housing is provided with a feed port connected to the hopper part, and the bottom of the feeding housing is provided with a discharge port connected to the spraying part. The side of the feed housing is provided with a residual air port connected to the dust removal system and an air supply port connected to the air path system; the feed rotor is a cylindrical structure or a frustum-shaped structure, and the two end faces of the feed rotor are respectively provided with Rotating shafts, the central axes of the two rotating shafts are located on the same straight line, and the surface of the feeding rotor is provided with more than two rotor cups in a ring at equal intervals. The feeding rotor is placed horizontally inside the feeding housing, and the surface of the feeding rotor There is a rubber seal and an oil injection hole connected to the external lubrication system between the inner wall of the feeding material housing. The rotating shaft of the feeding rotor protrudes from the feeding material housing, and the part of the rotating shaft protruding from the feeding material housing is connected to the end flange through the seal. It is further connected to the outer side of the feeding housing, and one of the rotating shafts of the feeding rotor is also connected to the power part; when the power part drives the feeding rotor to rotate, each rotor material cup follows the rotation of the feeding rotor and passes through the feeding housing in turn When one of the rotor cups gradually turns to the discharge port of the feeding shell, the air supply port is connected to the rotor cup, so that the material in the rotor cup can quickly enter Spray part. 2. The long-distance dust-free concrete sprayer according to claim 1, wherein the spraying part comprises a spraying shell and a spraying rotor, and the top of the spraying shell is open and connected to the feed shell The discharge port of the body, so that a spray chamber with a sealed structure is formed between the spray shell and the feed shell. The side of the spray shell is provided with an air inlet connected to the air system and an outlet connected to the external injection pipe. Material opening; the cross-section of the spraying rotor is circular, the shaft section of the spraying rotor is in the shape of a truncated cone or similar to a truncated cone, and the outer surface of the lower part of the spraying rotor is evenly distributed with a plurality of troughs that open outwards. The feeding part falls on the upper outer surface of the spraying rotor, and further slides along the upper outer surface of the spraying rotor into a plurality of troughs on the lower outer surface of the spraying rotor; the central axis position of the spraying rotor is connected to There is a drive shaft, which protrudes downward from the spray housing and is connected to the power part. When the power part drives the spray rotor to rotate, each trough rotates with the spray rotor and passes through the discharge of the spray housing in turn. The inlet, and the air inlet is above the trough that just passes through the discharge port, so that the air inlet, the trough that just passes through the discharge port, and the discharge port are connected to form a U-shaped structure. 3. The long-distance dust-free concrete sprayer according to claim 1, characterized in that, the number of said feeding cups is 2-4. 4. The long-distance dust-free concrete sprayer according to claim 1, characterized in that, the other rotating shaft of the feeding rotor protrudes outward from the feeding housing and is connected with a tensioning device. 5. The long-distance dust-free concrete sprayer according to claim 2, characterized in that, the number of the troughs is 10-25. 6. The long-distance dust-free concrete sprayer according to claim 1, wherein the power part is hydraulic transmission or mechanical transmission.