A fully enclosed, dust-free wet and dry concrete spraying machine and its working method

Abstract

This invention discloses a fully enclosed, dust-free, wet and dry concrete spraying machine and its operating method. The device includes at least one set of horizontally placed transport cylinders, a drive unit for connecting the two transport cylinders, a feeding assembly connected to the drive unit and located inside the transport cylinders, a discharge component at the other end of the feeding assembly, a first valve on the transport cylinders, a first connecting pipe connected to the first valve, a second valve connected to the first connecting pipe, and a second connecting pipe for connecting the two second valves. The transport cylinders are of a single integrated structure, with their length parallel to the ground. The second connecting pipe is a T-junction pipe. The transport cylinders also have a discharge port. By using two alternately used, single-unit transport cylinders, this device can prevent the raw materials from overflowing or floating in the air during pressurization of the transport cylinders, thereby ensuring the safety and health of the workers.

Description

Technical Field

[0001] This invention relates to a concrete spraying machine, specifically a fully enclosed, dust-free dry and wet concrete spraying machine, and relates to the field of precast concrete reverse spraying process. Background Technology

[0002] A concrete spraying machine is a mechanical device that sprays concrete mixture directly onto the surface of a building or structure to reinforce the building surface or form a new structure.

[0003] However, existing concrete spraying machines still have some problems. Most existing concrete spraying machines are rotor-type concrete spraying machines, and most of them are vertical structures. In the existing rotor, the operator first pours the raw materials from the filter screen above into the mixing drum, and then the rotation completes the mixing of various raw materials. However, in actual operation, there is a certain gap between the existing mixing drum and the feed hopper. Moreover, large vibrations are generated during the mixing process, or large amounts of force are required during spraying. This can cause the mixed concrete or gel-like product to flow out from the gap. This not only leads to the loss of raw materials, but also, when the diameter of the raw materials is small, the raw materials will float in the air. Since this device is mostly used in mine tunnels, it can cause suffocation or damage to the life and health of the miners in the mine.

[0004] Therefore, how to prevent material from flowing out between the mixing drum and the feed hopper is a problem that needs to be solved. Summary of the Invention

[0005] Purpose of the invention: To provide a fully enclosed, dust-free, wet and dry concrete spraying machine to solve the above-mentioned problems existing in the prior art.

[0006] Technical solution: A fully enclosed, dust-free, wet and dry concrete spraying machine, comprising:

[0007] At least one set of horizontally placed transport cylinders, a drive unit for connecting two transport cylinders, a push-feed assembly connected to the drive unit and located inside the transport cylinder, a discharge unit located at the other end of the push-feed assembly, a first valve located on the transport cylinder, a first connecting pipe connected to the first valve, a second valve connected to the first connecting pipe, and a second connecting pipe for connecting two second valves.

[0008] The push-feed assembly includes a drive shaft connected to the drive component, a feeding section connected to the drive shaft, and a transport section connected to the feeding section, the transport section being connected to the discharge component;

[0009] The transport cylinder is a single-piece structure, and its length direction is parallel to the ground.

[0010] The second connecting pipe is a three-way connecting pipe, and the conveying cylinder is also provided with a discharge port, and the first valve abuts against the inner wall of the discharge port;

[0011] The driving component includes a driven gear located at the free end of the connecting shaft, a transmission chain for connecting the two driven gears, and a conveyor motor connected to one of the driven gears and fixedly mounted on the mobile chassis.

[0012] In a further embodiment, the discharge component is cylindrical, the axial direction of the discharge component coincides with the axial direction of the transmission shaft, and the discharge component rotates as the transmission shaft rotates;

[0013] The discharge component is provided with at least two through holes evenly distributed on it;

[0014] At least during the rotation of the discharge component, there will be an overlapping area between the through hole on the discharge component and the discharge port. The material can flow out from this overlapping area. Conversely, when there is no overlapping area between the through hole on the discharge component and the discharge port, the material can accumulate at the discharge port. When an overlapping area appears, the accumulated material can be discharged from the discharge port. This can prevent too much or too little material from being sprayed out, thus ensuring that the material can be sprayed out evenly.

[0015] In a further embodiment, the feeding section includes a connecting shaft connected to the drive shaft, and a first helical blade coiled around the connecting shaft in the circumferential direction.

[0016] In a further embodiment, the transport section includes a second helical blade connected to the first helical blade;

[0017] The second spiral blade is connected to the discharge component;

[0018] The first spiral blade is the material addition area. The added material is transported to the shaftless second spiral blade by the rotation of the first spiral blade. Then, the second spiral blade, through its own rotation, transports the material to the discharge port.

[0019] The pitch between adjacent blades of the first helical blade is greater than the pitch of the second helical blade; this increases the transport capacity, thereby ensuring that the transport capacity can reach normal discharge and guaranteeing the normal operation of the concrete spraying machine.

[0020] In a further embodiment, the first valve includes a housing disposed at the discharge port, a drive motor disposed on the housing, a drive shaft connected to the drive motor, a valve core connected to the drive shaft, and a frustum disposed on the valve core.

[0021] During installation, the bottom surface of the truncated cone faces the discharge part, and the bottom surface of the truncated cone is connected to the valve core. By controlling the rotation of the truncated cone, the opening and closing of the first valve can be realized, thereby ensuring the smooth progress of material transportation.

[0022] During installation, there is a predetermined distance between the bottom surface of the cylindrical platform and the plane where the discharge part is located, to ensure that the cylindrical platform will not collide with the discharge part when it rotates;

[0023] There is a predetermined curvature between the bottom surface and the side surface of the truncated cone; this device directly aligns the truncated cone with the feeding plate, thereby reducing the length of this area and thus reducing material accumulation in this area.

[0024] In a further embodiment, a cleaning assembly is also provided along the length of the transport cylinder;

[0025] The cleaning assembly includes at least two sets of first nozzles symmetrically installed on the transport cylinder, and second nozzles disposed between the first nozzles and staggered on the transport cylinder;

[0026] The first nozzle has a predetermined angle between its spray area and the horizontal plane, and the second nozzle can spray water in a cross pattern; it can clean the inner wall of the transport cylinder.

[0027] In a further embodiment, the transport cylinder is also provided with an air inlet valve, as well as a pressure detector, an exhaust valve, and a safety valve installed on the transport cylinder;

[0028] During spraying, compressed high-pressure gas is introduced into the transport cylinder through the air inlet valve. When the first valve is opened, the material can be sprayed out from one end of the second connecting pipe, thus ensuring the spraying of concrete material and allowing it to be sprayed onto the surface of the designated object, ensuring the smooth progress of the spraying operation.

[0029] In a further embodiment, the conveying cylinder is also provided with a butterfly valve, a mixer for connecting two butterfly valves, a feed hopper connected to the mixer, a movable base for connecting two conveying cylinders, and a track wheel provided on the movable base.

[0030] The drive unit is mounted on the movable base to ensure the concrete feeding operation and thus ensure that the concrete can be smoothly sprayed to the designated position.

[0031] A working method for the aforementioned fully enclosed, dust-free, wet and dry concrete spraying machine includes the following steps:

[0032] S1: When the shotcrete machine is needed to spray concrete or other materials, the control system can first open the exhaust valve for a predetermined time. The concrete raw material is put into the feed hopper, and then the material will fall into the mixer under its own gravity. Then the control system can open the two butterfly valves to allow the material to fall into the predetermined conveying cylinder. When the material enters a designated conveying cylinder, the butterfly valve connected to the pipe wall of the conveying cylinder is opened and the exhaust valve on the conveying cylinder is closed, so that the material can be transported to the predetermined conveying cylinder.

[0033] S2: Then the driving component starts to work, and the moving driving component can drive the transmission shaft connected to it to start rotating. The moving transmission shaft can drive the first spiral blade set on the transmission shaft to start rotating. Then the moving first spiral blade can drive the second spiral blade to start rotating. Then, with the cooperation of the first spiral blade and the second spiral blade, the material in the conveying cylinder can be moved, so that the material can be located at the discharge port on the conveying cylinder, thus completing the material transportation work.

[0034] S3: When the material is transported to the discharge port, the discharge component is connected to the second spiral blade. Therefore, the rotating second spiral blade can drive the discharge component to rotate. As the discharge component rotates, there is an overlapping area between the through hole and the discharge port, which allows the material to pass through the through hole on the discharge component and be placed in the discharge area.

[0035] S4: When the material is in the discharge area, the control system can turn on the control switch of the drive motor, and the drive motor can start working. The moving drive motor can drive the drive shaft to rotate, and the moving drive shaft can drive the valve core to move. The moving valve core can drive the truncated cone to rotate. When the truncated cone rotates, it can no longer seal the first valve. At this time, as the second spiral blades squeeze the material and compressed high-pressure gas is introduced into the conveying cylinder from the air inlet valve, the material in the discharge area can pass through the first valve. At the same time as the first valve is opened, the second valve at the other end of the first connecting pipe connected to the first valve is opened, and the material can be sprayed out from one end of the second connecting pipe, thereby completing the concrete spraying work in the designated area.

[0036] S5: When one of the conveying cylinders is in the discharge state, the other conveying cylinder repeats the above steps S1 and S2, thereby adding material to the other conveying cylinder and placing the material in another discharge area. When the material in one of the conveying cylinders is completely sprayed, the first valve and the second valve connected to that conveying cylinder close in sequence, and then the exhaust valve on that conveying cylinder opens, repeating steps S1-S2. Then the other conveying cylinder repeats the above steps S3-S4, thereby completing the concrete spraying work at the designated location. This allows the two conveying cylinders to be used alternately, thus ensuring the continuity of the concrete spraying work.

[0037] Beneficial Effects: This invention discloses a fully enclosed, dust-free, wet and dry concrete spraying machine. To prevent material from flowing out between the mixing drum and the feeding hopper, the device includes at least one set of horizontally placed conveyor drums, a drive unit for connecting the two conveyor drums, a pushing and feeding assembly connected to the drive unit and located inside the conveyor drums, a discharge component at the other end of the pushing and feeding assembly, a first valve on the conveyor drums, a first connecting pipe connected to the first valve, a second valve connected to the first connecting pipe, and a second connecting pipe for connecting the two second valves; the pushing and feeding assembly... The component includes a drive shaft connected to the drive component, a feeding section connected to the drive shaft, and a transport section connected to the feeding section, the transport section being connected to the discharge component; the transport cylinder is an integral structure, the length direction of the transport cylinder is parallel to the ground; the second connecting pipe is a three-way connecting pipe, the transport cylinder is also provided with a discharge port, and the first valve abuts against the inner wall of the discharge port; by setting two transport cylinders that are used alternately and are both integral structures, it is possible to avoid the overflow or floating of raw materials in the air during the pressurization process of the transport cylinder, thereby ensuring the life, health and safety of the workers. Attached Figure Description

[0038] Figure 1 This is the left view of the present invention.

[0039] Figure 2 This is the front view of the present invention.

[0040] Figure 3 This is a schematic diagram of the push-feed component of the present invention.

[0041] Figure 4 This is a schematic diagram of the feeding section structure of the present invention.

[0042] Figure 5 This is a schematic diagram of the discharge component of the present invention.

[0043] Figure 6 This is a schematic diagram of the cleaning assembly structure of the present invention.

[0044] Figure 7This is a schematic diagram of the valve core structure of the present invention.

[0045] Figure 8 This is a schematic diagram of another embodiment of the feeding component in this invention.

[0046] The attached figures are labeled as follows: 1. Transport cylinder; 2. Drive unit; 3. Feed hopper; 4. Mixer; 5. Butterfly valve; 6. Pushing and feeding assembly; 61. Drive shaft; 62. Feeding section; 621. First spiral blade; 622. Connecting shaft; 63. Transport section; 631. Second spiral blade; 7. Cleaning assembly; 71. First nozzle; 72. Second nozzle; 8. Exhaust gas outlet valve; 9. Inlet valve; 10. Pressure detector; 11. First valve; 11. Drive motor; 111. Drive shaft; 112. Valve core; 113. Housing; 114. First connecting pipe; 12. Second valve; 13. Second connecting pipe; 14. Moving base; 15. Discharge component; 16. Safety valve; 17. Detailed Implementation

[0047] Based on the applicant's research and analysis, the reason for this problem (leading to material loss, and when the material diameter is small, it may float in the air) is that most existing concrete spraying machines are rotor-type concrete spraying machines, and most are vertical structures. In existing rotors, during operation, the operator first pours the raw materials from the upper filter screen into the mixing drum, and then the drum rotates to mix the various materials. However, in actual operation, there is a certain gap between the existing mixing drum and the feed hopper. Furthermore, significant vibrations occur during mixing, or considerable force is required during spraying, causing the mixed concrete or gel-like product to flow out through this gap. This not only leads to material loss, but also, when the material diameter is small, it may float in the air. Since these devices are mostly used in mines, this could cause suffocation or harm to the health and lives of miners. This invention aims to prevent material from flowing out between the mixing drum and the feed hopper. The device includes at least one set of horizontally placed transport cylinders, a drive unit for connecting two transport cylinders, a feeding assembly connected to the drive unit and located inside the transport cylinder, a discharge unit located at the other end of the feeding assembly, a first valve on the transport cylinder, a first connecting pipe connected to the first valve, a second valve connected to the first connecting pipe, and a second connecting pipe for connecting two second valves. The feeding assembly includes a drive shaft connected to the drive unit, a feeding part connected to the drive shaft, and a transport part connected to the feeding part. The transport part is connected to the discharge unit. The transport cylinder is an integral structure, and its length is parallel to the ground. The second connecting pipe is a three-way connecting pipe. The transport cylinder also has a discharge port, and the first valve abuts against the inner wall of the discharge port. By using two transport cylinders that are used alternately and are both integral structures, it is possible to avoid the overflow or floating of raw materials in the air during the pressurization process of the transport cylinder, thereby ensuring the life, health and safety of the workers.

[0048] A fully enclosed, dust-free, wet and dry concrete spraying machine includes: a transport cylinder 1, a drive unit 2, a feed hopper 3, a mixer 4, a butterfly valve 5, a pusher and feeding assembly 6, a drive shaft 61, a feed section 62, a first spiral blade 621, a connecting shaft 622, a transport section 63, a second spiral blade 631, a cleaning assembly 7, a first nozzle 71, a second nozzle 72, an exhaust valve 8, an intake valve 9, a pressure detector 10, a first valve 11, a drive motor 111, a drive shaft 112, a valve core 113, a housing 114, a first connecting pipe 12, a second valve 13, a second connecting pipe 14, a movable base 15, a discharge component 16, and a safety valve 17.

[0049] As attached Figures 1 to 8To prevent the mixed concrete or gel-like product from flowing out of the gap, which would not only lead to material loss but also cause the material to float in the air when its diameter is small, this device includes at least one set of horizontally placed transport cylinders 1, a drive unit 2 for connecting two transport cylinders 1, a pushing and feeding assembly 6 connected to the drive unit 2 and located inside the transport cylinder 1, a discharge unit 16 at the other end of the pushing and feeding assembly 6, a first valve 11 on the transport cylinder 1, a first connecting pipe 12 connected to the first valve 11, a second valve 13 connected to the first connecting pipe 12, and a second connecting pipe 14 for connecting two second valves 13; the pushing and feeding assembly 6 includes The system includes a drive shaft 61 connected to the drive unit 2, a feeding section 62 connected to the drive shaft 61, and a transport section 63 connected to the feeding section 62. The transport section 63 is connected to the discharge unit 16. The transport cylinder 1 is an integral structure, and its length is parallel to the ground. The second connecting pipe 14 is a three-way connecting pipe. The transport cylinder 1 is also provided with a discharge port, and the first valve 11 abuts against the inner wall of the discharge port. When the material is in the discharge area, the control system can turn on the drive motor. The control switch 111 activates the drive motor 111, which in turn drives the drive shaft 112 to rotate. The drive shaft 112 then drives the valve core 113 to rotate, which in turn drives the truncated cone to rotate. When the truncated cone rotates, it can no longer seal the first valve 11. At this point, the second spiral blades 631 compress the material, and high-pressure compressed gas is introduced into the conveying cylinder 1 from the inlet valve 9. This allows the material in the discharge area to pass through the first valve 11. Simultaneously with opening the first valve 11, the second valve 13 at the other end of the first connecting pipe 12 connected to the first valve 11 is also opened, allowing the material to flow from the second connecting pipe. 14. One end is sprayed out, which can complete the concrete spraying work in the designated area. When one of the conveying cylinders 1 is in the discharge state, the other conveying cylinder 1 repeats the above steps S1 and S2, which can add material to the other conveying cylinder 1 and place the material in another discharge area. When the material in one of the conveying cylinders 1 is completely sprayed, the first valve 11 and the second valve 13 connected to the conveying cylinder 1 are closed in sequence, and then the exhaust valve 8 on the conveying cylinder 1 is opened. Steps S1-S2 are repeated, and then the other conveying cylinder 1 repeats the above steps S3-S4, which can complete the concrete spraying work at the designated position, and thus the two conveying cylinders 1 can be used alternately to ensure the continuity of the concrete spraying work.Because the second connecting pipe 14 is a three-way connecting pipe, when one of the conveying cylinders 1 is working, the material will flow into the first connecting pipe 12 connected to the other conveying cylinder 1 under the push of air pressure, which may easily cause the other connecting pipe to become blocked. Therefore, this device is equipped with a second valve 13 on each of the first connecting pipes 12, so that the first connecting pipe 12 can be controlled individually to avoid blockage. In the working state, the material is transported by pushing the feeding component 6, thus ensuring that the concrete spraying work can be carried out normally. At the same time, the two conveying cylinders 1, which are used alternately and are both integral structures, are also used. This prevents raw materials from overflowing or floating in the air during pressurization of the conveying cylinder 1, thus ensuring the safety and health of workers. In this embodiment, the discharge component 16 has a plate-like structure. In a further embodiment, the diameter of the discharge plate is larger than the diameter of the column formed when the second spiral blade 631 rotates. The discharge plate is made of polyurethane or plastic, which prevents friction between the second spiral blade 631 and the inner wall of the conveying cylinder 1 during rotation, thereby preventing damage to the conveying cylinder 1. The discharge plate is detachably connected to the second spiral blade 631, and its detachable installation allows for easy replacement.

[0050] In a further embodiment, traditional material transport devices mostly use spiral blades for transport. During the rotation of the spiral blades, a large amount of material will accumulate at the outlet. When the operator opens the first valve 11, the material may cause the first connecting pipe 12 to become blocked, or the second connecting pipe 14 may spray too much material at the moment the device is working, thus affecting its spraying effect. After cleaning the blocked area of ​​the first connecting pipe 12 or after a period of time, the amount of material at the spraying point will decrease sharply due to the reduction of accumulated material.

[0051] To solve the above problems, the discharge component 16 is cylindrical, and its axial direction coincides with that of the drive shaft 61. The discharge component 16 rotates with the drive shaft 61. At least two through holes are evenly distributed on the discharge component 16. During the rotation of the discharge component 16, there will be an overlap area between the through holes and the discharge port, allowing material to flow out from this overlap area. Conversely, when there is no overlap area between the through holes and the discharge port, material can accumulate at the discharge port. When an overlap area appears, the accumulated material can be discharged from the discharge port. When the material is transported to the discharge port, because the discharge component 16 is connected to the second spiral blade 631, the rotating second spiral blade 631 can drive the discharge component 16 to rotate. As the discharge component 16 rotates, the through holes and the discharge port can then overlap. There is an overlapping area between the discharge ports, allowing the material to pass through the through holes on the discharge component 16 and be placed in the discharge area. In the non-spraying state, the material is transported to the discharge area by the first spiral blade 621 and the second spiral blade 631. The material can only be sprayed out from the second connecting pipe 14 when there is an overlapping area between the through holes on the discharge component 16 and the discharge port. When there is no overlap, the material can accumulate in the discharge area and be sprayed out after the next overlap. This avoids spraying too much or too little material and ensures that the material is sprayed out evenly. The number of through holes is at least two. In actual operation, through holes of different diameters can be opened on the discharge plate to make the through hole size different, thereby adjusting the overlapping area between the through hole and the discharge port and controlling the discharge amount of material.

[0052] In a further embodiment, since the pitch between adjacent blades in the existing spiral blades is the same, a large amount of material is in the process of transportation, resulting in insufficient material output, which in turn results in insufficient amount of concrete sprayed from the second connecting pipe 14, and thus a reduction in the amount of sprayed concrete.

[0053] The feeding section 62 includes a connecting shaft 622 connected to the drive shaft 61, and a first spiral blade 621 coiled around the connecting shaft 622 in the circumferential direction; the conveying section 63 includes a second spiral blade 631 connected to the first spiral blade 621; the second spiral blade 631 is connected to the discharge component 16; wherein the first spiral blade 621 is the material addition area, the added material can be transported to the shaftless second spiral blade by the rotation of the first rotating blade, and then the second rotating blade can transport the material to the discharge port by its own rotation, the pitch between adjacent blades of the first spiral blade 621 is greater than the pitch of the second spiral blade 631; then the driving component 2 starts to work, and the moving driving component 2. The drive shaft 61 connected to it can be driven to rotate, and the moving drive shaft 61 can drive the first spiral blade 621 set on the drive shaft 61 to rotate. Then, the moving first spiral blade 621 can drive the second spiral blade 631 to rotate. With the cooperation of the first spiral blade 621 and the second spiral blade 631, the material in the conveying cylinder 1 can be moved, so that the material can be located at the discharge port on the conveying cylinder 1, thereby completing the material transportation work. By setting the pitch of the second spiral blade 631 to be smaller than the pitch of the first spiral blade 621, the conveying capacity is increased, thereby ensuring that the conveying capacity can reach the normal discharge and ensuring the normal operation of the concrete spraying machine.

[0054] The first valve 11 includes a housing 114 disposed at the discharge port, a drive motor 111 disposed on the housing 114, a drive shaft 112 connected to the drive motor 111, a valve core 113 connected to the drive shaft 112, and a frustum disposed on the valve core 113. During installation, the bottom surface of the frustum faces the discharge component 16, and the bottom surface of the frustum is connected to the valve core 113. By controlling the rotation of the frustum, the opening and closing of the first valve 11 can be achieved, thereby ensuring the smooth operation of material transportation. The installation process is as follows: During installation, there is a predetermined distance between the bottom surface of the cylindrical platform and the plane where the discharge component 16 is located, ensuring that the cylindrical platform will not collide with the discharge component 16 when it rotates; there is a predetermined curvature between the bottom surface of the cylindrical platform and the side surface of the cylindrical platform; by setting the cylindrical platform, since traditional valves have an idle area at both ends, excessive material will remain in that area during the feeding process, which can easily lead to pipe blockage. Therefore, this device directly aligns the cylindrical platform with the feeding plate, thereby reducing the length of that area and reducing the accumulation of material in that area.

[0055] The transport cylinder 1 is also provided with a cleaning group 7 along its length; the cleaning group 7 includes at least two sets of first nozzles 71 symmetrically installed on the transport cylinder 1, and second nozzles 72 disposed between the first nozzles 71 and staggered on the transport cylinder 1; wherein the spraying area of ​​the first nozzles 71 has a predetermined angle with the horizontal plane, and the second nozzles 72 can spray water streams in a cross direction; through the cleaning group 7, the inner wall of the transport cylinder 1 can be cleaned, and the transport cylinder 1 is also provided with a maintenance port.

[0056] The conveying cylinder 1 is also equipped with an air inlet valve 9, a pressure detector 10, an exhaust valve 8, and a safety valve 17. During spraying, compressed high-pressure gas is introduced into the conveying cylinder 1 through the air inlet valve 9, and when the first valve 11 is opened, the material can be sprayed out from one end of the second connecting pipe 14, thus ensuring the concrete material can be sprayed onto the surface of the designated object. The conveying cylinder 1 is also equipped with a butterfly valve 5, a mixer 4 for connecting the two butterfly valves 5, a feed hopper 3 connected to the mixer 4, a movable base 15 for connecting the two conveying cylinders 1, and track wheels on the movable base 15. The drive unit 2 is installed on the movable base 15. On the moving base 15; when the spraying machine needs to spray concrete or other materials, the control system can first open the exhaust valve for a predetermined time, and the concrete raw material is put into the feed hopper 3. Then, the material will fall into the mixer 4 under its own gravity. Then the control system can open the two butterfly valves 5, so that the material can fall into the predetermined conveying cylinder 1. When the material enters the designated conveying cylinder 1, the butterfly valve 5 connected to the pipe wall of the conveying cylinder 1 is opened and closed, and the exhaust valve on the conveying cylinder 1 is closed, so that the material can be transported to the predetermined conveying cylinder 1; ensuring the concrete feeding work, and thus ensuring that the concrete can be smoothly sprayed to the predetermined position.

[0057] In a further embodiment, another embodiment of the feeding component 6 is that the discharge component 16 is a hollow tubular structure. The discharge component 16 is sleeved on the front section of the transport section 63. The discharge component 16 has a plurality of through holes evenly arranged in the circumferential direction. In this embodiment, the discharge port on the transport cylinder 1 is located at the bottom, so that when the transport section 63 rotates, the material can flow out from the discharge port located at the bottom of the transport cylinder 1 to complete the material transport work.

[0058] In a further embodiment, in the process of mixing self-mixed concrete, traditional concrete spraying machines mostly involve first placing dry concrete in the feed hopper 3, and then adding water to the hopper. During the above process, concrete is also being discharged. In other words, in the above process, traditional concrete spraying machines need to complete the feeding, watering and discharge simultaneously, which will lead to the inability to control the flow rate of the added water, resulting in too much or too little water being added, which in turn leads to the sprayed concrete being too dry or too thin, thus affecting its spraying effect.

[0059] To address the aforementioned issues, this device incorporates a partition on the feed hopper 3, dividing it into two feeding zones. Materials in these zones fall into their respective conveyor cylinders 1 under their own weight. The discharge port on each conveyor cylinder 1 has a diameter of approximately 6 cm, and each cylinder can hold about 200 kg of material. Therefore, during discharge, it takes about one minute to completely empty one conveyor cylinder 1. The larger diameter of the butterfly valve 5 allows material to fall from the feed hopper 3 into the conveyor cylinder 1 in about 15 seconds, resulting in a time difference of approximately 45 seconds. Furthermore, since the device has two conveyor cylinders 1, after one cylinder completes its discharge, the other begins its discharge process, also taking about one minute, resulting in a time difference of about 1 minute and 45 seconds. During this time, the dry concrete can be thoroughly mixed with the added water in conjunction with the mixer 4. Simultaneously, the water flow rate can be precisely controlled, thus preventing the sprayed concrete from being too dry or too thin. Water is added to the feed hopper 3 through nozzles installed on the feed hopper 3. In the above embodiment, due to the large diameter of the butterfly valve 5, the time taken for the feeding process is much shorter than the time taken for transporting and discharging the material. The partition includes an upper partition and a lower partition. The lower partition is installed on the inner wall of the mixer 4, and the upper partition is detachably connected to the feed hopper 3. Both the upper and lower partitions are provided with grooves that are adapted to the mixing shaft in the mixer 4. At the same time, the nozzles installed on the feed hopper 3 can also adsorb floating dust, thereby reducing the spread of dust. During the material transportation process, the material is in two transport cylinders 1, and the valves are used to keep it in a sealed state, thereby preventing dust from escaping during transportation. The partitions not only divide the feed hopper 3, but also divide the mixing area of ​​the mixer 4 into two areas, with each area corresponding to one of the two transport cylinders 1.

[0060] Working principle description: When the shotcrete machine needs to spray concrete or other materials, the control system first opens the exhaust valves for a predetermined time, and the concrete raw material is fed into the feed hopper 3. Then, the material falls into the mixer 4 under its own gravity. The control system can then open the two butterfly valves 5, allowing the material to fall into the designated conveyor cylinder 1. Once the material enters the designated conveyor cylinder 1, the butterfly valve 5 connected to the pipe wall of the conveyor cylinder 1 is opened and closed, and the exhaust valve on the conveyor cylinder 1 is closed, thus enabling the material to be transported to the designated conveyor cylinder 1; then the drive... When the moving component 2 starts working, the driving component 2 drives the connected transmission shaft 61 to rotate. The rotating transmission shaft 61 then drives the first helical blade 621 mounted on it to rotate. The first helical blade 621 then drives the second helical blade 631 to rotate. With the cooperation of the first and second helical blades 621, the material in the conveying cylinder 1 is moved, bringing it to the discharge port on the conveying cylinder 1, thus completing the material transport. Once the material is transported to the discharge port, it is then... Since the discharge component 16 is connected to the second spiral blade 631, the rotating second spiral blade 631 can drive the discharge component 16 to rotate. As the discharge component 16 rotates, there is an overlapping area between the through hole and the discharge port, allowing the material to pass through the through hole on the discharge component 16 and be placed in the discharge area. When the material is in the discharge area, the control system can turn on the control switch of the drive motor 111, allowing the drive motor 111 to start working. The moving drive motor 111 can drive the drive shaft 112 to rotate, and the moving drive shaft 112 can drive the valve core 11. 3. The valve core 113 moves and drives the truncated cone to start rotating. When the truncated cone rotates, it can no longer seal the first valve 11. At this time, the material is squeezed by the second spiral blade 631 and pressurized into the conveying cylinder 1 from the air inlet valve 9. The material in the discharge area can then pass through the first valve 11. At the same time as the first valve 11 is opened, the second valve 13 at the other end of the first connecting pipe 12 connected to the first valve 11 is also opened. The material can then be sprayed out from one end of the second connecting pipe 14, thereby completing the concrete spraying work in the designated area.When one of the conveyor cylinders 1 is in the discharge state, the other conveyor cylinder 1 repeats steps S1 and S2, thereby adding material to the other conveyor cylinder 1 and placing the material in another discharge area. Once the material in one conveyor cylinder 1 has been completely sprayed, the first valve 11 and the second valve 13 connected to that conveyor cylinder 1 close sequentially, and then the exhaust valve 8 on that conveyor cylinder 1 opens. Steps S1-S2 are repeated, and then the other conveyor cylinder 1 repeats steps S3-S4, thus completing the concrete spraying work at the designated location. This allows the two conveyor cylinders 1 to be used alternately, ensuring the continuity of the concrete spraying work.

[0061] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A fully enclosed, dust-free, wet and dry concrete spraying machine, characterized in that, include: At least one set of horizontally placed transport cylinders, a drive unit for connecting two transport cylinders, a push-feed assembly connected to the drive unit and located inside the transport cylinder, a discharge unit located at the other end of the push-feed assembly, a first valve located on the transport cylinder, a first connecting pipe connected to the first valve, a second valve connected to the first connecting pipe, and a second connecting pipe for connecting two second valves. The push-feed assembly includes a drive shaft connected to the drive component, a feeding section connected to the drive shaft, and a transport section connected to the feeding section, the transport section being connected to the discharge component; The transport cylinder is a single-piece structure, and its length direction is parallel to the ground. The second connecting pipe is a three-way connecting pipe, and the conveying cylinder is also provided with a discharge port, and the first valve abuts against the inner wall of the discharge port; The discharge component is cylindrical, and the axial direction of the discharge component coincides with the axial direction of the transmission shaft. The discharge component rotates as the transmission shaft rotates. The discharge component is provided with at least two through holes evenly distributed on it; At least during the rotation of the discharge component, there will be an overlapping area between the through hole on the discharge component and the discharge port. At this time, the material can flow out from the overlapping area. Conversely, when there is no overlapping area between the through hole on the discharge component and the discharge port, the material can accumulate at the discharge port. When an overlapping area appears, the accumulated material can be discharged from the discharge port. The feeding section includes a connecting shaft connected to the drive shaft and a first spiral blade coiled around the connecting shaft in the circumferential direction. The transport section includes a second spiral blade connected to the first spiral blade; The second spiral blade is connected to the discharge component; The first spiral blade is the material addition area. The added material is transported to the shaftless second spiral blade by the rotation of the first spiral blade. Then, the second spiral blade, through its own rotation, transports the material to the discharge port. The pitch between adjacent blades of the first helical blade is greater than the pitch of the second helical blade; The first valve includes a housing disposed at the discharge port, a drive motor disposed on the housing, a drive shaft connected to the drive motor, a valve core connected to the drive shaft, and a frustum disposed on the valve core; During installation, the bottom surface of the truncated cone faces the discharge part, and the bottom surface of the truncated cone is connected to the valve core. By controlling the rotation of the truncated cone, the opening and closing of the first valve can be realized, thereby ensuring the smooth progress of material transportation. During installation, there is a predetermined distance between the bottom surface of the cylindrical platform and the plane where the discharge part is located, to ensure that the cylindrical platform will not collide with the discharge part when it rotates; There is a predetermined curvature between the bottom surface of the frustum and the side surface of the frustum.

2. The fully enclosed, dust-free, wet and dry concrete spraying machine according to claim 1, characterized in that: The transport cylinder is also equipped with a cleaning unit along its length. The cleaning assembly includes at least two sets of first nozzles symmetrically installed on the transport cylinder, and second nozzles disposed between the first nozzles and staggered on the transport cylinder; The first nozzle's spray area has a predetermined angle with the horizontal plane, and the second nozzle can spray water streams in a cross pattern.

3. The fully enclosed, dust-free, wet and dry concrete spraying machine according to claim 1, characterized in that: The transport cylinder is also equipped with an air inlet valve, as well as a pressure detector, an exhaust valve, and a safety valve. During spraying, pressure is applied to the conveying cylinder through the air inlet valve, and when the first valve is opened, the material can be sprayed out from one end of the second connecting pipe, thus ensuring the spraying of concrete material and allowing it to be sprayed onto the surface of the designated object.

4. The fully enclosed, dust-free, wet and dry concrete spraying machine according to claim 1, characterized in that: The conveying cylinder is also equipped with a butterfly valve, a mixer for connecting two butterfly valves, a feed hopper connected to the mixer, a movable base for connecting two conveying cylinders, and track wheels on the movable base. The drive unit is mounted on the movable base.

5. A working method for a fully enclosed, dust-free wet and dry concrete spraying machine according to any one of claims 1 to 4, characterized in that, Includes the following steps: S1: When the spraying machine is needed to spray concrete or other materials, the control system can first open the exhaust valve for a predetermined time, and the concrete raw material is put into the feed hopper. Then, the material will fall into the mixer under its own gravity. Then, the control system can open the two butterfly valves to allow the material to fall into the predetermined conveying cylinder. When the material enters the designated conveying cylinder, the butterfly valve connected to the conveying cylinder is closed and the exhaust valve on the conveying cylinder is closed, so that the material can be transported to the predetermined conveying cylinder. S2: The driving component works, and the moving driving component can drive the transmission shaft connected to it to start rotating. The moving transmission shaft can drive the first spiral blade set on the transmission shaft to start rotating. Then the moving first spiral blade can drive the second spiral blade to start rotating. With the cooperation of the first spiral blade and the second spiral blade, the material in the conveying cylinder can be moved, so that the material can be located at the discharge port on the conveying cylinder, thereby completing the material transportation work. S3: When the material is transported to the discharge port, the discharge component is connected to the second spiral blade. Therefore, the rotating second spiral blade can drive the discharge component to rotate. As the discharge component rotates, there is an overlapping area between the through hole and the discharge port, which allows the material to pass through the through hole on the discharge component and be placed in the discharge area. S4: When the material is in the discharge area, the control system can turn on the control switch of the drive motor, and the drive motor can start working. The moving drive motor can drive the drive shaft to rotate, and the moving drive shaft can drive the valve core to move. The moving valve core can drive the truncated cone to rotate. When the truncated cone rotates, it can no longer seal the first valve. At this time, with the extrusion of the material by the second spiral blade and the pressurization from the air inlet valve into the conveying cylinder, the material in the discharge area can pass through the first valve. At the same time as the first valve is opened, the second valve at the other end of the first connecting pipe connected to the first valve is opened, and the material can be sprayed out from one end of the second connecting pipe, thereby completing the concrete spraying work in the designated area. S5: When one of the conveying cylinders is in the discharge state, the other conveying cylinder repeats the above steps S1 and S2, thereby adding material to the other conveying cylinder and placing the material in another discharge area. When the material in one of the conveying cylinders is completely sprayed, the first valve and the second valve connected to that conveying cylinder close in sequence, and then the exhaust valve on that conveying cylinder opens, repeating steps S1-S2. Then the other conveying cylinder repeats the above steps S3-S4, thereby completing the concrete spraying work at the designated location. This allows the two conveying cylinders to be used alternately, thus ensuring the continuity of the concrete spraying work.

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