WO2021179647A1

WO2021179647A1 - Long-distance concrete spraying machine

Info

Publication number: WO2021179647A1
Application number: PCT/CN2020/127412
Authority: WO
Inventors: 马官国; 陈连军; 程卫民; 刘国明; 衣龙晓; 张存慧
Original assignee: 山东科技大学
Priority date: 2020-03-12
Filing date: 2020-11-09
Publication date: 2021-09-16
Also published as: CN111188637A; CN111188637B

Abstract

A long-distance concrete spraying machine, comprising an underframe, a cylinder barrel mechanism (5), a rotor mechanism (7) and a hydraulic system, wherein the cylinder barrel mechanism (5) comprises an upper cylinder barrel part and a lower cylinder barrel part. A cylinder barrel, a pushing piston, a sealing piston and a sealing box body thereof match with one another, the sealing piston and the cylinder barrel form an end face seal, and an end part of a lower cylinder barrel is provided with a material collecting box (504) for collecting residual materials accumulated by the pushing piston. The rotor mechanism (7) mainly comprises a rotor shell (706), a rotor (707) and a conical distributor (709), wherein materials in each bin are continuously sprayed during the rotation process of the rotor (707). The hydraulic system comprises a hydraulic oil tank (3) and an electric motor (4), and provides power for the spraying machine. The spraying machine uses the form of an end face seal to prevent friction between a sealing component and concrete and the cylinder barrel, a rigid piston can be used as the pushing piston, sealing is achieved by means of the sealing piston, and the rotor mechanism (7) uniformly distributes the concrete to achieve pulse-free continuity; and the spraying machine further has the advantages of long-distance dust-free conveying, a long service life, etc.

Description

Long-distance concrete spraying machine

Technical field

The invention relates to the technical field of concrete spraying equipment, in particular to a remote concrete spraying machine.

Background technique

Concrete spraying machines are indispensable in the construction of coal mine tunnels and highway and railway tunnels. At present, the commonly used concrete spraying machines on the market mainly include rotor type, push chain type, pumping type, etc., of which pumping concrete spraying machine can only Used for wet spraying, the equipment is large, the cleaning and maintenance are complicated, and the application is less and less; dry spraying and wet spraying equipment such as rotor type, push chain type, etc. have problems such as large dust, short conveying distance, and fast seal wear, so it needs to be provided A concrete spraying machine with small volume, small amount of dust and long conveying distance.

In addition, in the existing concrete spraying machine mechanism, the sealing part and the pushing part are mostly of the same structure, which not only plays the role of pushing material but also sealing, but with the friction between the concrete and the sealing structure, the sealing structure fails quickly, and at the same time pushing Rigid structure cannot be used for material parts, and insufficient sealing will also cause problems such as small spraying distance and easy generation of dust; and most spraying devices still have pulse problems. For this reason, the existing concrete spraying machine structure has been further improved. .

Technical solutions

In order to solve the problems of large dust and short conveying distance caused by insufficient sealing during concrete spraying, as well as the wear caused by the friction between the seal and the cylinder and the concrete, the present invention provides a remote concrete spraying machine. The specific technical solutions are as follows .

A long-distance concrete spraying machine includes a base frame, a cylinder tube mechanism, a rotor mechanism, and a hydraulic system. The rotor mechanism is fixed on the base frame for spraying concrete. The cylinder tube mechanism is arranged above the rotor mechanism. The system realizes hydraulic drive; the cylinder mechanism includes an upper cylinder part, a lower cylinder part and a sealing box. The sealing box is connected with the upper cylinder and the lower cylinder. The upper sealing piston and the upper sealing piston of the upper cylinder part The cylinder barrel forms an end face seal, the lower sealing piston of the lower cylinder barrel part and the lower cylinder barrel form an end face seal, at least one of the upper sealing piston and the lower sealing piston is in a sealing position; the side of the sealing box is provided with an exhaust device, A collecting box is also provided at the end of the lower cylinder.

Preferably, the rotor mechanism includes a rotor housing, a rotor, a conical distributor, an air inlet, a discharge port, a housing leg, and a drive mechanism. The drive mechanism includes a drive motor, a gear box and a motor seat. The rotor housing is supported by the housing. The legs are fixed above the gearbox, the rotor is in the rotor housing and connected to the output shaft of the gearbox, and the conical distributor is arranged above the rotor; a sealing seat is also provided between the rotor housing and the output shaft of the gearbox , The inside of the sealing seat is provided with a 0-shaped sealing ring, the bottom of the rotor housing is equipped with a discharge port, and the upper part of the rotor housing on the same side as the discharge port is also provided with an air inlet; the input end of the gearbox is fixedly installed On the motor seat, the output shaft of the motor and the input shaft of the gearbox are connected by a spline.

It is also preferred that the rotor has a ring shape as a whole, and a plurality of partitions are evenly arranged along the ring, a plurality of material cavities are formed between the partitions, and the lower side of the material cavity is open; the through hole in the middle of the rotor is a mounting hole, a mounting hole and a gear The output shaft of the box is installed in cooperation.

It is also preferable that the lower case of the lower cylinder part is fixedly connected to the rotor housing, the sealed box is fixed on the side of the lower case, the lower cylinder seat is arranged on the side of the lower case opposite to the sealed box, and the lower cylinder is installed on the lower cylinder seat. The lower cylinder is arranged in the sealed box, and the collection box is connected to the sealed box; the lower pushing piston and the lower sealing piston of the lower cylinder part are fixedly connected by a lower connecting rod, and the lower sealing piston and the lower sealing piston The piston rod of the oil cylinder is fixedly connected, and the lower pushing piston moves along the lower cylinder.

It is also preferred that the upper cylinder of the upper cylinder part and the cylinder flange on the sealing box are fixedly connected, and the upper oil cylinder is fixed to the end of the upper cylinder through the upper oil cylinder seat; the upper sealing piston and the upper pushing piston The upper connecting rod is fixedly connected; the upper pushing piston and the piston rod of the upper oil cylinder are fixedly connected, and the hopper is fixed above the upper cylinder.

It is further preferred that the connecting end of the upper cylinder barrel and the sealing box is provided with an upper sealing rubber, the upper sealing piston is provided with a sealing boss, and the upper sealing piston and the upper sealing rubber cooperate to form a seal.

It is further preferred that the connection end of the lower cylinder barrel and the sealing box is provided with a lower sealing rubber, the lower sealing piston is provided with a sealing boss, and the lower sealing piston and the lower sealing rubber cooperate to form a seal.

It is further preferred that the exhaust device is installed on the sealed box through an exhaust flange, and the exhaust device includes an exhaust cylinder, an exhaust piston, an exhaust seat and an exhaust pipe, and the exhaust pipe passes through the exhaust pipe. The exhaust seat is fixedly connected to the exhaust seat, the exhaust cylinder is fixed at the end of the exhaust pipe, and the exhaust piston is fixed at the front end of the piston rod of the exhaust cylinder and moves along the exhaust pipe; the exhaust piston is also provided with O-shaped sealing ring, the exhaust pipe is provided with a plurality of inner exhaust holes, and the exhaust seat is connected with the sealed box.

It is further preferred that the hopper contains concrete, and the concrete in the hopper falls into the upper cylinder. At this time, the lower sealing piston is in the sealing position; the movement of the upper pushing piston pushes the material in the upper cylinder to the sealing box, and the material is removed from the sealing box. The box falls into the lower cylinder; at this time, the upper sealing piston is in the sealing position, and the lower pushing piston pushes the material in the lower cylinder to the lower box. The material falls into the rotor shell through the lower box and falls through the conical distributor. Into the material trough of the rotor, the rotor rotates to push the concrete to the discharge port in turn, and the air inlet conveys the concrete by high-pressure air pumping.

Beneficial effect

The beneficial effects of a long-distance concrete spraying machine provided by the present invention include:

(1) The concrete sprayer is equipped with a cylinder mechanism, a rotor mechanism and a hydraulic system on the underframe, and each component is reasonably arranged on the underframe to make the overall structure of the equipment compact. The piston is sealed by the upper and lower cylinders. With the cooperation of, a better seal is achieved, dust is reduced, and the spray distance is increased.

(2) The ejector piston and the sealing piston are separated, which shortens the contact distance between the piston and the cylinder and the material, thereby reducing the sealing of the piston and prolonging the service life of the piston; the hopper is ensured by the rotor and the conical distributor Orderly feeding, realizing the continuity of concrete transportation and shotcrete, reducing the shotcrete pulse; by setting the collecting box to form a sealed space, and the collecting box can also collect the less material entrained by the lower pushing piston.

In addition, when the jet is working, one of the sealing pistons is in a sealed state, so as to ensure the overall sealing of the equipment, prevent dust from escaping, ensure the sealing performance, and increase the conveying distance.

Description of the drawings

Figure 1 is a schematic diagram of the structure of a long-distance concrete spraying machine;

Figure 2 is a schematic diagram of the structure of the rotor mechanism;

Figure 3 is a schematic diagram of the rotor housing;

Figure 4 is a schematic diagram of the rotor;

Figure 5 is a schematic diagram of the structure of the air intake device;

Figure 6 is a schematic partial cross-sectional view of the assembly structure of the cylinder mechanism and the rotor mechanism;

Figure 7 is a cross-sectional view of the cylinder mechanism;

Figure 8 is a schematic diagram of the sealed box structure;

Figure 9 is a schematic diagram of the structure of the exhaust device;

Figure 10 is a structural diagram of the exhaust pipe;

In the picture:

1- walking wheel; 2- frame; 3- hydraulic oil tank; 4- motor; 5- cylinder mechanism; 6-exhaust device; 7- rotor mechanism;

501- hopper, 502- upper sealed piston, 503- lower push piston, 504- collection box, 505- lower sealed piston, 506- upper push piston, 507- upper cylinder, 508- lower cylinder, 509-sealed box , 510- lower sealing rubber, 511- lower box, 512- lower cylinder seat, 513- lower connecting rod, 514- upper sealing rubber, 515- upper connecting rod, 516- upper cylinder tube, 517- upper cylinder seat, 518 -Upper cylinder flange, 519-exhaust hole, 520-exhaust flange;

601-exhaust cylinder, 602-exhaust piston, 603-exhaust seat, 604-exhaust pipe, 605-inner exhaust hole;

701-gear box, 702-motor seat, 703-drive motor, 704-discharge port, 705-seal seat, 706-rotor housing, 707-rotor, 708-intake device, 709-cone distributor, 710 -Air inlet mounting seat, 711-material cavity, 712-mounting plate; 713 air outlet.

Embodiments of the present invention

With reference to Figures 1 to 10, the specific implementation of a short-distance concrete spraying machine provided by the present invention is as follows.

A long-distance concrete spraying machine specifically includes a base frame, a cylinder tube mechanism 5, a rotor mechanism 7 and a hydraulic system. The rotor mechanism is fixed on the chassis for spraying concrete, the cylinder tube mechanism is arranged above the rotor mechanism for transferring concrete, and the hydraulic system realizes hydraulic drive. The electric motor 4 of the hydraulic system is installed above the hydraulic oil tank 3, the output shaft of the electric motor is connected with the hydraulic pump through a coupling, and the hydraulic pump is arranged in the hydraulic oil tank. The bottom frame includes a frame 2 and a walking wheel 1. The walking wheel 1 is set at the bottom of the frame 2, and one walking wheel can be set at the four corners of the bottom frame. The frame can be made of steel welding, and the walking wheel can be used according to the environment. Choose a suitable walking wheel structure. The concrete spraying machine is equipped with a cylinder mechanism 5, a rotor mechanism 7 and a hydraulic system on the base frame. The various components are reasonably arranged on the base frame to make the overall structure of the equipment compact. The cylinder mechanism seals the piston to achieve better Good sealing reduces dust and improves spraying distance.

The cylinder mechanism 5 includes an upper cylinder part, a lower cylinder part and a sealing box. The sealing box 509 is connected with the upper cylinder and the lower cylinder. The upper sealing piston of the upper cylinder part and the upper cylinder form an end face seal. The lower sealing piston of the barrel part and the lower cylinder barrel form an end face seal, and at least one of the upper sealing piston and the lower sealing piston is in a sealing position. The structure of the sealed box is shown in Figure 8. It can be an integrated structure. The sealed box is also provided with an upper cylinder tube connecting flange and an exhaust flange. The lower cylinder tube can be combined with the sealed box or integrated. During the working process, the sealed box can be kept sealed with one mouth. An exhaust device is arranged on the side of the sealed box. When the upper cylinder pushes materials into the sealed box, the exhaust device opens to exhaust. The end of the lower cylinder is also provided with a collecting box, which seals the moving range of the pushing piston, and collects a small amount of materials entering the collecting box to avoid blockage.

The lower box body 511 of the lower cylinder part and the rotor housing 706 are fixedly connected, which can be fixed by flange connection or welding. The sealing box 509 is fixed on the side of the lower box body 511, and the lower cylinder seat 512 is arranged on the lower box body 511 to seal On the opposite side of the box 509, the lower cylinder 508 is mounted on the lower cylinder seat. The lower cylinder is arranged in a sealed box 509, and the collection box 504 is connected to the sealed box 509. In addition, the tightness of the connection position must be ensured. The lower pushing piston 503 and the lower sealing piston 505 of the lower cylinder are fixedly connected by a lower connecting rod, the lower sealing piston 505 is fixedly connected with the piston rod of the lower cylinder, and the lower pushing piston 503 moves along the lower cylinder; The pushing piston 503, the lower sealing piston 505, the lower connecting rod 513 and the lower cylinder 508 are arranged coaxially. The lower pushing piston 503 moves in the lower cylinder to complete the pushing, and the lower sealing piston is used to complete the sealing. The connecting end of the lower cylinder barrel and the sealing box is provided with a lower sealing rubber 510, the lower sealing piston 505 is provided with a sealing boss, the lower sealing piston 505 and the lower sealing rubber 510 cooperate to form a seal, and the lower sealing piston is pressed against the lower sealing rubber. The position is the sealed position.

The upper cylinder 516 of the upper cylinder part is fixedly connected with the cylinder flange on the sealing box 509, and the upper cylinder 507 is fixed to the end of the upper cylinder through the upper cylinder seat. The upper sealing piston 502 and the upper pushing piston are fixedly connected by an upper connecting rod, the upper pushing piston is fixedly connected with the piston rod of the upper cylinder, and the hopper 501 is fixed above the upper cylinder; the upper sealing piston and the upper pushing piston Coaxially arranged with the upper cylinder 507, the upper pushing piston 506 moves in the upper cylinder to complete the material pushing, and the upper sealing piston 502 is used to complete the sealing. The connecting end of the upper cylinder 516 and the sealing box 509 is provided with an upper sealing rubber 514, the upper sealing piston 502 is provided with a sealing boss, the upper sealing piston and the upper sealing rubber cooperate to form a seal, and the upper sealing piston is pressed against the upper sealing rubber The position is the sealed position.

In the upper cylinder part and the lower cylinder part, the pushing piston and the sealing piston are separated from each other, especially the sealing piston is only in contact with the cylinder when sealing, so the wear of the sealing piston is small; and the pushing piston separates the material. Therefore, rigid pistons can be used, which are more wear-resistant and extend the life of the equipment. In addition, in an embodiment not shown, the cross-sections of the pushing piston and the sealing piston may be square, and the cross-sectional shapes of the cylinder barrel and the box body are matched with the piston.

The exhaust device is installed on the sealed box through an exhaust flange. The exhaust device specifically includes an exhaust cylinder 601, an exhaust piston 602, an exhaust seat 603, and an exhaust pipe 604. The exhaust pipe 604 passes through the exhaust seat and connects with each other. The exhaust seat is fixedly connected and can be fixedly connected by a flange. The exhaust cylinder 601 is fixed at the end of the exhaust pipe, and the exhaust piston 602 is fixed at the front end of the piston rod of the exhaust cylinder and moves along the exhaust pipe. The exhaust piston 602 is also provided with an O-shaped sealing ring, the exhaust pipe 604 is provided with a plurality of inner exhaust holes, and the exhaust seat is communicated with the sealing box. The exhaust cylinder 601 pushes the exhaust piston to move in the exhaust pipe. When the exhaust piston 602 blocks the position of the inner exhaust hole, the exhaust device is closed; when the exhaust piston 602 leaves the inner exhaust hole 605, the exhaust seat The inner exhaust hole 605 is connected with the exhaust seat and the sealed box to achieve exhaust.

The rotor mechanism includes a rotor housing 706, a rotor 707, a tapered distributor 709, an air inlet, a discharge port 704, a housing leg, and a drive mechanism. The drive mechanism includes a drive motor 703, a gear box 701, and a motor seat 702. The rotor housing 706 is fixed above the gear box by the legs of the housing, the rotor 707 is in the rotor housing and connected with the output shaft of the gear box, and the conical distributor 709 is arranged above the rotor. A sealing seat 705 is also provided between the rotor housing 706 and the output shaft of the gearbox 701. The sealing seat 705 is provided with a 0-shaped sealing ring. The bottom of the rotor housing is equipped with a discharge port. An air inlet is also provided above the shell. The input end of the gear box 701 is fixedly installed on the motor seat, and the output shaft of the driving motor and the input shaft of the gear box are connected by a spline. The rotor 707 has a ring shape as a whole, and a plurality of partitions are evenly arranged along the ring. The partitions are arranged along the radius of the rotor. A plurality of material cavities 711 are formed between the partitions. The lower side of the material cavity is open. The through hole in the middle of the rotor 707 is a mounting hole , The mounting hole and the output shaft of the gearbox are matched and installed, the mounting hole can be oblate, and the output shaft of the gearbox 701 is also oblate. In addition, the rotor housing 706 has a cylindrical shape as a whole, a fixing plate is provided on the lower side, and a sealing hole and a discharge hole are provided on the fixed plate; the side surface of the rotor housing 706 is provided with an air inlet mounting seat, which is used The air inlet device 708 is fixedly installed. The air inlet device includes a mounting plate 712 and an air outlet 713. The mounting plate 712 and the air inlet mounting seat 710 are installed in cooperation with each other. The air outlet part of the air inlet device extends into the rotor housing 706, and the air outlet The shape is the same as the contour shape of the rotor material cavity 711, which facilitates jet feeding.

The working principle of the concrete spraying machine is as follows: the hopper contains concrete or other materials, and the concrete in the hopper falls into the upper cylinder. At this time, the lower sealing piston is in the sealing position; the movement of the upper pushing piston pushes the material in the upper cylinder to In the sealed box, the material falls from the sealed box into the lower cylinder; at this time, the upper sealing piston is in the sealing position, and the lower pushing piston pushes the material in the lower cylinder to the lower box. The material passes through the lower box and falls into the rotor shell. The cone divider falls into the trough of the rotor, the rotor rotates to push the concrete to the discharge port in turn, and the air inlet transports the concrete by high-pressure air pumping.

The ejector piston and the sealing piston are separated, which shortens the contact distance between the piston and the cylinder and the material, thereby reducing the sealing of the piston and prolonging the service life of the piston; the rotor and the conical distributor ensure the orderly supply of the hopper It can realize the continuity of concrete conveying and shotcrete, and reduce the shotcrete pulse; by setting the collecting box to form a sealed space, and the collecting box can also collect the less material entrained by the lower pushing piston, and realize the cylinder barrel. Sealing of the end; the jet machine also has the advantages of long-distance dust-free transportation, long life, etc.

Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention shall also belong to the present invention. The scope of protection of the invention.

Claims

A long-distance concrete spraying machine is characterized by comprising a base frame, a cylinder tube mechanism, a rotor mechanism and a hydraulic system. The rotor mechanism is fixed on the base frame for spraying concrete, and the cylinder tube mechanism is arranged above the rotor mechanism. , The hydraulic system realizes hydraulic drive; the cylinder mechanism includes an upper cylinder part, a lower cylinder part and a sealing box, the sealing box is connected with the upper cylinder and the lower cylinder, and the upper part of the upper cylinder The sealing piston and the upper cylinder form an end face seal, the lower sealing piston of the lower cylinder part and the lower cylinder form an end face seal, at least one of the upper sealing piston and the lower sealing piston is in a sealing position; the side of the sealing box is provided with For the exhaust device, a collecting box is also arranged at the end of the lower cylinder.
The remote concrete spraying machine according to claim 1, wherein the rotor mechanism includes a rotor housing, a rotor, a conical distributor, an air inlet, a discharge port, a housing leg and a driving mechanism, The drive mechanism includes a drive motor, a gear box and a motor seat. The rotor housing is fixed above the gear box through housing legs. The rotor is in the rotor housing and connected to the output shaft of the gear box. The conical distributor is arranged above the rotor; A sealing seat is also arranged between the rotor housing and the output shaft of the gearbox, and a 0-shaped sealing ring is arranged inside the sealing seat. An air inlet is also provided; the input end of the gear box is fixedly mounted on the motor seat, and the motor output shaft and the gear box input shaft are connected by splines.
The remote concrete spraying machine according to claim 2, wherein the rotor has a ring shape as a whole, and a plurality of partitions are evenly arranged along the ring, a plurality of material cavities are formed between the partitions, and the lower side of the material cavity is open ; The through hole in the middle of the rotor is a mounting hole, and the mounting hole and the gearbox output shaft are matched for installation.
The remote concrete spraying machine according to claim 1, wherein the lower box of the lower cylinder part is fixedly connected with the rotor shell, the sealed box is fixed on the side of the lower box, and the lower cylinder seat is arranged in the lower box. On the side of the body opposite to the sealed box, the lower cylinder is installed on the lower cylinder seat; the lower cylinder is arranged in the sealed box, and the collecting box is connected with the sealed box; the lower pushing piston and the lower cylinder of the lower cylinder The sealing pistons are fixedly connected by a lower connecting rod, the lower sealing piston and the piston rod of the lower oil cylinder are fixedly connected, and the lower pushing piston moves along the lower cylinder.
The remote concrete spraying machine according to claim 4, wherein the upper cylinder of the upper cylinder part is fixedly connected with the cylinder flange on the sealing box, and the upper cylinder is fixed on the upper cylinder through the upper cylinder seat. The end of the cylinder; the upper sealing piston and the upper pushing piston are fixedly connected by an upper connecting rod; the upper pushing piston and the piston rod of the upper oil cylinder are fixedly connected, and the hopper is fixed above the upper cylinder.
The remote concrete spraying machine according to claim 5, wherein the connecting end of the upper cylinder tube and the sealing box is provided with an upper sealing rubber, the upper sealing piston is provided with a sealing boss, the upper sealing piston and The upper sealing rubber cooperates to form a seal.
The remote concrete spraying machine according to claim 5, wherein the connecting end of the lower cylinder and the sealing box is provided with a lower sealing rubber, the lower sealing piston is provided with a sealing boss, the lower sealing piston and The lower sealing rubber cooperates to form a seal.
The long-distance concrete spraying machine according to any one of claims 5 to 7, wherein the exhaust device is installed on the sealed box through an exhaust flange, and the exhaust device includes an exhaust oil cylinder, An exhaust piston, an exhaust seat and an exhaust pipe, the exhaust pipe passes through the exhaust seat and is fixedly connected to the exhaust seat, the exhaust cylinder is fixed at the end of the exhaust pipe, and the exhaust piston is fixed at the exhaust cylinder The front end of the piston rod is moved along the exhaust pipe; the exhaust piston is also provided with an O-shaped sealing ring, the exhaust pipe is provided with a plurality of inner exhaust holes, and the exhaust seat is communicated with the sealing box.
The remote concrete spraying machine according to claim 8, wherein the hopper contains concrete, and the concrete in the hopper falls into the upper cylinder, and the lower sealing piston is at the sealing position; the upper pushing piston moves The material in the upper cylinder is pushed to the sealed box, and the material falls from the sealed box into the lower cylinder; at this time, the upper sealing piston is in the sealing position, and the lower pushing piston pushes the material in the lower cylinder to the lower box, and the material passes through The lower box body falls into the rotor shell, and falls into the trough of the rotor through the conical distributor. The rotor rotates and pushes the concrete to the outlet in turn, and the air inlet delivers high-pressure air to pump the concrete.