Concrete spraying device for underground works and spraying method thereof

Abstract

The application belongs to the technical field of concrete spraying devices, and discloses a concrete spraying device for underground engineering, which comprises a base, an electrical control box body is fixedly installed at the right side of the top of the base, a centrifugal mechanism is arranged at the left side of the top of the base, a hopper is fixedly connected at the top of the centrifugal mechanism, a spray pipe is fixedly connected at the bottom of the centrifugal mechanism, a separation tank is fixedly connected at the top of the hopper, a support frame is fixedly connected at the right side of the separation tank, an electric telescopic rod is fixedly installed at the top of the left side of the support frame, an installation block is fixedly connected to the bottom end of the electric telescopic rod, a tension sensor is arranged in the installation block, a connecting frame is fixedly connected to the bottom of the installation block, and connecting blocks are fixedly connected to the front and rear of the bottom of the connecting frame and located in the separation tank. Thus, the feeding flow rate of the concrete mortar can be ensured, the filtering speed is improved, and the spraying flow rate of the device is also improved.

Description

Technical Field

[0001] This invention belongs to the technical field of concrete spraying equipment, specifically a concrete spraying device and spraying method for underground engineering. Background Technology

[0002] Concrete shotcreting equipment is used in underground engineering projects such as tunnels, culverts, subways, bridges, coal mines, and high-altitude coal mines. Currently, the most commonly used shotcreting machine is the rotor type. The structure of a rotor-type shotcreting machine mainly consists of a drive unit, rotor assembly, air duct system, spraying system, and electrical control box. Currently, concrete shotcreting equipment typically has a filtration and separation mechanism at the top to filter out aggregates from the concrete mortar. The filtration and separation mechanism currently used in concrete shotcreting equipment uses a single filter screen for filtration and separation. However, to ensure the continuous operation of the concrete shotcreting equipment... The device requires a continuous flow of concrete mortar. During this continuous flow, the filtered stones cannot be removed, leading to a large accumulation of stones on the filter screen. This affects the filter screen's filtration efficiency and reduces the concrete mortar feed rate. A reduced concrete mortar flow rate decreases the spraying flow rate of the device. Furthermore, since the concrete mortar pouring rate is fixed, a decrease in filter screen efficiency will cause a large accumulation of concrete mortar inside the filtration and separation mechanism, potentially leading to overflow. Therefore, improvements are needed. Summary of the Invention

[0003] The purpose of this invention is to provide a concrete spraying device and spraying method for underground engineering, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a concrete spraying device for underground engineering, comprising a base, an electrical control box body fixedly installed on the right side of the top of the base, a centrifugal mechanism provided on the left side of the top of the base, a funnel fixedly connected to the top of the centrifugal mechanism, a spray pipe fixedly connected to the bottom of the centrifugal mechanism, a separation box fixedly connected to the top of the funnel, a support frame fixedly connected to the right side of the separation box, an electric telescopic rod fixedly installed on the top of the left side of the support frame, a mounting block fixedly connected to the bottom end of the electric telescopic rod, a tension sensor provided inside the mounting block, a connecting frame fixedly connected to the bottom of the mounting block, and connecting blocks located inside the separation box fixedly connected to the front and rear sides of the bottom of the connecting frame, two connecting blocks are provided, a filter screen one fixedly connected to the right side between the two connecting blocks, a base plate movably connected to the left side between the two connecting blocks, a material chamber opened inside the connecting box, a filter screen two provided on the right side of the inner wall of the separation box, a laser sensor fixedly installed on the top of the rear of the separation box, and a laser receiver fixedly installed in front of the laser sensor inside the separation box.

[0005] Preferably, a limiting rod is provided inside the connecting block, and a slider is movably sleeved on the outer surface of the limiting rod, with the inner side of the slider connected to the base plate.

[0006] Preferably, a spring is sleeved on the outer surface of the limiting rod, one end of the spring is connected to the slider, and the other end of the spring is connected to the right side inside the connecting block.

[0007] Preferably, a collection box located below the bottom plate is fixedly installed on the left side inside the separation box, and a filter screen is provided at the bottom of the collection box.

[0008] Preferably, a fixing block is fixedly connected to the upper right side of the collection box, a roller is movably installed on the left side of the fixing block, a squeezing plate is movably connected to the left side of the roller, and the top of the squeezing plate is connected to the bottom plate.

[0009] Preferably, a support block 1 located below the connecting frame is fixedly connected to both the front and rear sides of the separation box, and a support block 2 located below the support block 1 is fixedly connected to both the front and rear sides of the separation box. A round rod is fixedly connected between the support block 1 and the support block 2. A movable block is movably sleeved on the outer surface of the round rod, and a baffle that contacts the left side of the separation box is fixedly connected to the left side of the movable block.

[0010] Preferably, a second spring is sleeved on the outer surface of the round rod, one end of the second spring is connected to the first support block, and the other end of the second spring is connected to the moving block.

[0011] Preferably, a connecting plate one is fixedly connected to the right side of the movable block, a connecting plate two is movably latched above the connecting plate one, and the upper inner side of the connecting plate two is fixedly connected to the connecting frame.

[0012] Preferably, the shotcrete operation steps are as follows:

[0013] S1: Select an extension pipe of appropriate length according to the range and distance of the shotcrete, connect it to the spray pipe, and then connect the nozzle to the extension pipe;

[0014] S2: Pour the mixed concrete mortar into the interior of the separation box through the upper left side of the separation box. At this time, the stones in the concrete mortar can be filtered through the first filter screen and placed above the first filter screen. The concrete mortar then enters the interior of the centrifugal mechanism through the funnel, while the stones slide down to the top of the bottom plate, thus separating the concrete mortar from the stones.

[0015] S3: After the concrete mortar enters the centrifugal mechanism through the funnel, the rotor inside the centrifugal mechanism is driven to rotate at high speed by the electrical control box. The feeder pushes the concrete mortar and injects it into the straight material cavity of the rotor. At this time, the concrete mortar will be subjected to centrifugal force.

[0016] S4: The material in the material chamber is brought into the nozzle by centrifugal force, and then enters the extension tube through the nozzle, and finally is sprayed out through the nozzle.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. This invention, by setting up a connecting frame, a second filter screen, and a laser sensor, addresses the issue that when the top of the first filter screen is full, the filtration efficiency of the concrete mortar decreases. As more concrete is poured in, the concrete mortar above the first filter screen accumulates. When the height of the accumulation blocks the laser sensor's laser beam, the laser receiver cannot receive the infrared laser. At this point, the controller activates the electric telescopic rod. The operation of the electric telescopic rod moves the mounting block, connecting frame, and connecting block downwards, and also moves the first filter screen downwards. This prevents the concrete mortar from overflowing during further pouring. Simultaneously, the second filter screen is exposed above the first filter screen, allowing the concrete mortar to enter the material chamber and flow into the funnel. This ensures the feed flow rate of the concrete mortar, increases the filtration speed, and consequently increases the spraying flow rate of the device.

[0019] 2. This invention, by setting up a squeezing plate, a collection box, and rollers, causes the bottom plate and squeezing plate to move downwards due to the descent of the connecting block. The movement of the squeezing plate allows its inclined surface to contact the rollers. As the connecting block descends, the rollers squeeze and push the squeezing plate and bottom plate, causing the bottom plate to move to the right along the outer surface of the limiting rod via a slider. This releases the obstruction of stones above the bottom plate, allowing the stones above the bottom plate and filter screen to fall under gravity and eventually into the collection box. This eliminates the accumulation of stones above the filter screen and reduces the tension on the tension sensor, thereby improving the filtration effect of the filter screen and facilitating its continued use.

[0020] 3. This invention, by setting up a moving block, a baffle, and a second connecting plate, allows the connecting plate to move downwards due to the descent of the connecting frame. At this time, the second spring, currently compressed, pushes the moving block downwards along the outer surface of the round rod due to the restoring effect of its elasticity, causing the baffle to move downwards as well. When the moving block contacts the second supporting block, the baffle seals the left side of the collection box, preventing concrete mortar leakage. After the first filter screen and the stones inside the bottom plate have completely fallen into the collection box, the tension sensor will experience a minimum tension, at which point the controller will activate the electric motor. The telescopic rod, due to its operation, allows the mounting block to drive the connecting frame, connecting block, filter screen one, and base plate to return to their original positions. Simultaneously, it drives the connecting plate two to move upwards. The movement of connecting plate two allows it to engage with connecting plate one, causing connecting plate one to move upwards. The movement of connecting plate one causes the moving block to rise along the outer surface of the round rod, and also causes the baffle to rise, simultaneously releasing the baffle's seal. At this point, the stones inside the collection box slide out through the inclined surface of filter screen three, making it convenient for operators to clean out the filtered stones without stopping the machine. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the present invention;

[0023] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0024] Figure 4 This is a schematic diagram of the structure of the present invention in cross-section from the side;

[0025] Figure 5 This is a cross-sectional view of the movable block of the present invention;

[0026] Figure 6 for Figure 5A magnified view of the structure at point B in the middle;

[0027] Figure 7 This is a cross-sectional view of the connecting block of the present invention;

[0028] Figure 8 for Figure 7 A magnified schematic diagram of the structure at point C in the middle;

[0029] Figure 9 This is a cross-sectional view of the filter screen of the present invention;

[0030] Figure 10 This is a side view of the present invention.

[0031] In the diagram: 1. Base; 2. Electrical control box body; 3. Centrifugal mechanism; 4. Funnel; 5. Nozzle; 6. Separation box; 7. Support frame; 8. Electric telescopic rod; 9. Mounting block; 10. Connecting frame; 11. Connecting block; 12. Filter screen one; 13. Base plate; 14. Connecting box; 15. Material chamber; 16. Filter screen two; 17. Laser sensor; 18. Laser receiver; 19. Limiting rod; 20. Slider; 21. Spring one; 22. Extrusion plate; 23. Collection box; 24. Filter screen three; 25. Fixing block; 26. Roller; 27. Support block one; 28. Support block two; 29. ​​Round rod; 30. Moving block; 31. Baffle; 32. Spring two; 33. Connecting plate one; 34. Connecting plate two; 35. Tension sensor. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1 to 10As shown, this embodiment of the invention provides a concrete spraying device for underground engineering, including a base 1. An electrical control box body 2 is fixedly installed on the right side of the top of the base 1. A centrifugal mechanism 3 is arranged on the left side of the top of the base 1. A funnel 4 is fixedly connected to the top of the centrifugal mechanism 3, and a spray pipe 5 is fixedly connected to the bottom of the centrifugal mechanism 3. A separation box 6 is fixedly connected to the top of the funnel 4. A support frame 7 is fixedly connected to the right side of the separation box 6. An electric telescopic rod 8 is fixedly installed on the top left side of the support frame 7. A mounting block 9 is fixedly connected to the bottom end of the electric telescopic rod 8. A tension sensor 35 is installed inside the mounting block 9. A connecting frame 10 is fixedly connected to the bottom of the loading block 9. Connecting blocks 11 located inside the separation box 6 are fixedly connected to the front and rear sides of the bottom of the connecting frame 10. There are two connecting blocks 11. A filter screen 12 is fixedly connected to the right side between the two connecting blocks 11. A base plate 13 is movably connected to the left side between the two connecting blocks 11. A material chamber 15 is opened inside the connecting box 14. A filter screen 16 is provided on the right side of the inner wall of the separation box 6. A laser sensor 17 is fixedly installed at the top rear of the inside of the separation box 6. A laser receiver 18 located in front of the laser sensor 17 is fixedly installed at the front of the inside of the separation box 6.

[0034] During use, the operator pours concrete mortar into the separation box 6 through the upper left side. At this time, the stones in the concrete mortar are filtered out by the filter screen 12 and placed above the filter screen 12. The concrete mortar then enters the centrifugal mechanism 3 through the funnel 4. At the same time, the stones slide down to the top of the bottom plate 13, which increases the tension on the tension sensor 35. As the concrete mortar is continuously poured in, a large number of stones will be filtered out above the filter screen 12. As the stones accumulate, the top of the filter screen 12 will gradually be filled. At this time, the concrete mortar filtration efficiency will decrease, and the concrete mortar above the filter screen 12 will accumulate.

[0035] When the accumulated height blocks the laser from the laser sensor 17, the laser receiver 18 will be unable to receive the infrared laser. At this time, the controller will activate the electric telescopic rod 8. Due to the operation of the electric telescopic rod 8, the mounting block 9, the connecting frame 10, and the connecting block 11 can be moved downward, and the filter screen 12 can be moved downward. This can prevent the concrete mortar from overflowing. At the same time, the filter screen 2 16 is exposed above the filter screen 12 and filtered through the filter screen 2 16, so that the concrete mortar enters the interior of the material cavity 15 and flows into the interior of the funnel 4 along the interior of the material cavity 15, thereby ensuring the feed flow rate of the concrete mortar.

[0036] like Figure 8 As shown, in one embodiment, a limiting rod 19 is provided inside the connecting block 11, and a slider 20 is movably sleeved on the outer surface of the limiting rod 19. The inner side of the slider 20 is connected to the base plate 13.

[0037] The working principle and beneficial effects of the above technical solution are as follows: The slider 20 and the limiting rod 19 are set up. Due to the design of the slider 20 and the limiting rod 19, the slider 20 can have good mobility on the outer surface of the limiting rod 19. At the same time, the slider 20 can play a good limiting effect on the base plate 13, so that the base plate 13 can move left and right along the outer surface of the limiting rod 19 through the slider 20.

[0038] like Figure 8 As shown, in one embodiment, a spring 21 is sleeved on the outer surface of the limiting rod 19. One end of the spring 21 is connected to the slider 20, and the other end of the spring 21 is connected to the right side inside the connecting block 11.

[0039] The working principle and beneficial effects of the above technical solution are as follows: When the slider 20 moves to the right, the spring 21 can be compressed. Due to the elastic recovery effect of the spring 21, the slider 20 and the base plate 13 can be pushed to the left, so as to facilitate the subsequent reset effect of the base plate 13.

[0040] like Figure 2 and Figure 3 As shown, in one embodiment, a collection box 23 located below the base plate 13 is fixedly installed on the left side inside the separation box 6, and a filter screen 24 is provided at the bottom of the collection box 23.

[0041] The working principle and beneficial effects of the above technical solution are as follows: The collection box 23 is set up. Due to the design of the collection box 23, it can play a good role in collecting stones. When the stones above the bottom plate 13 and the filter screen 12 enter the interior of the collection box 23, the accumulation effect of the stones on the filter screen 12 can be relieved. At the same time, the tension of the tension sensor 35 is reduced, thereby improving the filtration effect of the filter screen 12 and facilitating subsequent recycling.

[0042] Due to the design of filter screen 3 24, the concrete mortar accompanying the falling stones can fall through filter screen 3 24 into the interior of funnel 4.

[0043] like Figure 2 and Figure 3 As shown, in one embodiment, a fixing block 25 is fixedly connected to the upper right side of the collection box 23, a roller 26 is movably installed on the left side of the fixing block 25, a squeezing plate 22 is movably connected to the left side of the roller 26, and the top of the squeezing plate 22 is connected to the bottom plate 13.

[0044] The working principle and beneficial effects of the above technical solution are as follows: Roller 26 and pressing plate 22 are set up. When the bottom plate 13 moves downward, the pressing plate 22 can move downward. Due to the movement of the pressing plate 22, the inclined surface above the pressing plate 22 can contact the roller 26. As the bottom plate 13 descends, the roller 26 can squeeze and push the pressing plate 22 and the bottom plate 13, and the bottom plate 13 moves to the right along the outer surface of the limiting rod 19 through the slider 20, and releases the obstruction of the stones above the bottom plate 13, so that the stones above the bottom plate 13 and the filter screen 12 fall under the action of gravity and finally fall into the interior of the collection box 23.

[0045] like Figure 5 , Figure 6 and Figure 10 As shown, in one embodiment, a support block 27 located below the connecting frame 10 is fixedly connected to both the front and rear sides of the separation box 6. A support block 28 located below the support block 27 is fixedly connected to both the front and rear sides of the separation box 6. A round rod 29 is fixedly connected between the support block 27 and the support block 28. A movable block 30 is movably sleeved on the outer surface of the round rod 29. A baffle 31 that contacts the left side of the separation box 6 is fixedly connected to the left side of the movable block 30.

[0046] The working principle and beneficial effects of the above technical solution are as follows: When the moving block 30 moves downward along the outer surface of the round rod 29, the baffle 31 can move downward. When the moving block 30 contacts the second support block 28, the baffle 31 will seal the left side of the collection box 23 to prevent leakage of concrete mortar.

[0047] like Figure 5 , Figure 6 and Figure 10 As shown, in one embodiment, a second spring 32 is sleeved on the outer surface of the round rod 29. One end of the second spring 32 is connected to the first support block 27, and the other end of the second spring 32 is connected to the moving block 30.

[0048] The working principle and beneficial effects of the above technical solution are as follows: When the moving block 30 moves upward, the second spring 32 can be compressed. Due to the elastic recovery effect of the second spring 32, the moving block 30 can be pushed from above, so that the baffle 31 can subsequently close the collection box 23.

[0049] like Figure 5 , Figure 6 and Figure 10 As shown, in one embodiment, a connecting plate 33 is fixedly connected to the right side of the movable block 30, and a connecting plate 34 is movably engaged above the connecting plate 33. The upper inner side of the connecting plate 34 is fixedly connected to the connecting frame 10.

[0050] The working principle and beneficial effects of the above technical solution are as follows: Connecting plate 1 33 and connecting plate 2 34 are set up. When connecting plate 2 34 moves upward, it can drive connecting plate 1 33 to move upward. Due to the movement of connecting plate 1 33, the moving block 30 can be driven to rise along the outer surface of the round rod 29, and the baffle 31 can be driven to rise. At the same time, the baffle 31 is released from its closed state. At this time, the stones inside the collection box 23 slide out through the inclined surface of filter screen 3 24, which facilitates the operator's operation of cleaning stones.

[0051] like Figures 1 to 10 As shown, in one embodiment, the shotcrete operation steps are as follows:

[0052] S1: Select an extension pipe of the appropriate length according to the range and distance of the shotcrete, connect it to the nozzle 5, and then connect the nozzle to the extension pipe;

[0053] S2: Pour the mixed concrete mortar into the interior of the separation box 6 through the upper left side of the separation box 6. At this time, the stones in the concrete mortar can be filtered through the filter screen 12 and placed above the filter screen 12, so that the concrete mortar enters the interior of the centrifugal mechanism 3 through the funnel 4. At the same time, the stones will slide to the top of the bottom plate 13, thus separating the concrete mortar from the stones.

[0054] S3: After the concrete mortar enters the centrifugal mechanism 3 through the funnel 4, the rotor inside the centrifugal mechanism 3 is driven to rotate at high speed by the electrical control box body 2. The feeder pushes the concrete mortar and injects it into the straight material cavity of the rotor body. At this time, the concrete mortar will be subjected to centrifugal force.

[0055] S4: The material in the material chamber is brought into the nozzle 5 by centrifugal force, and then enters the extension tube through the nozzle 5, and finally is sprayed out through the nozzle.

[0056] Working principle and usage process:

[0057] The operator pours concrete mortar into the separation box 6 from the upper left side. At this time, the stones in the concrete mortar are filtered out by the filter screen 12, and the concrete mortar enters the centrifugal mechanism 3 through the funnel 4. Simultaneously, the stones slide down to the top of the base plate 13, increasing the tension on the tension sensor 35. As the concrete mortar continues to be poured in, a large number of stones will be filtered out from above the filter screen 12. As the stones accumulate, the area above the filter screen 12 gradually fills up. At this point, the concrete mortar filtration efficiency decreases, causing the concrete mortar above the filter screen 12 to accumulate. When the accumulated height blocks the laser from the laser sensor 17, the laser receiver 1... 8 will not receive infrared laser signals. At this time, the controller will activate the electric telescopic rod 8. Due to the operation of the electric telescopic rod 8, the mounting block 9, connecting frame 10, and connecting block 11 can be moved downwards, and the filter screen 12 can be moved downwards. This can prevent the concrete mortar from overflowing. At the same time, the filter screen 2 16 is exposed above the filter screen 12 and filtered through the filter screen 2 16, allowing the concrete mortar to enter the interior of the material cavity 15 and flow into the interior of the funnel 4. Due to the descent of the connecting block 11, the bottom plate 13 and the extrusion plate 22 will move downwards. Due to the movement of the extrusion plate 22, the inclined surface above the extrusion plate 22 can contact the roller 26. As the connecting block 11 descends, the concrete mortar can be further filtered. This causes the roller 26 to press and push the pressing plate 22 and the base plate 13, and causes the base plate 13 to move to the right along the outer surface of the limiting rod 19 via the slider 20, thus removing the obstruction of the stones above the base plate 13. This allows the stones above the base plate 13 and the filter screen 12 to fall under the influence of gravity, eventually falling into the collection box 23. This eliminates the accumulation of stones above the filter screen 12, and simultaneously reduces the tension on the tension sensor 35. Due to the descent of the connecting frame 10, the connecting plate 24 moves downward. At this time, the spring 22, which is in a compressed state, pushes the moving block 30 downward along the outer surface of the round rod 29 due to the restoring effect of its elasticity, and causes the baffle 31 to move downward. When the moving block 30 and the support block 2... When contact occurs, baffle 31 seals the left side of collection box 23 to prevent concrete mortar leakage. After all the stones inside filter screen 12 and base plate 13 have fallen into collection box 23, the tension sensor 35 will drop to its minimum value. At this time, the controller will activate electric telescopic rod 8. Due to the operation of electric telescopic rod 8, mounting block 9 can drive connecting frame 10, connecting block 11, filter screen 12 and base plate 13 to reset upwards, and at the same time drive connecting plate 2 34 to move upwards. Due to the movement of connecting plate 2 34, connecting plate 2 34 can engage with connecting plate 1 33, and drive connecting plate 1 33 to move upwards. Due to the movement of connecting plate 1 33, moving block 30 can rise along the outer surface of round rod 29.This causes the baffle 31 to rise, simultaneously releasing its seal. At this point, the stones inside the collection box 23 slide out through the inclined surface of the filter screen 24, making it easier for operators to clean the filtered stones.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concrete spraying device for underground engineering, comprising a base (1), characterized in that: An electrical control box body (2) is fixedly installed on the right side of the top of the base (1). A centrifugal mechanism (3) is provided on the left side of the top of the base (1). A funnel (4) is fixedly connected to the top of the centrifugal mechanism (3). A nozzle (5) is fixedly connected to the bottom of the centrifugal mechanism (3). A separation box (6) is fixedly connected to the top of the funnel (4). A support frame (7) is fixedly connected to the right side of the separation box (6). An electric telescopic rod (8) is fixedly installed on the top of the left side of the support frame (7). A mounting block (9) is fixedly connected to the bottom of the electric telescopic rod (8). A tension sensor (35) is provided inside the mounting block (9). A tension sensor (35) is fixedly connected to the bottom of the mounting block (9). There is a connecting frame (10), and connecting blocks (11) located inside the separation box (6) are fixedly connected to the front and rear sides of the bottom of the connecting frame (10). There are two connecting blocks (11). A filter screen (12) is fixedly connected to the right side between the two connecting blocks (11), and a base plate (13) is movably connected to the left side between the two connecting blocks (11). A connecting box (14) is provided on the right side of the separation box (6). A material cavity (15) is opened inside the connecting box (14). A filter screen (16) is provided on the right side of the inner wall of the separation box (6). A laser sensor (17) is fixedly installed on the top rear side inside the separation box (6). A laser sensor (17) is fixedly installed on the front side inside the separation box (6). A laser receiver (18) is fixedly installed on the front of the laser sensor (17); a collection box (23) is fixedly installed on the left side inside the separation box (6) below the base plate (13), a filter screen (24) is provided at the bottom of the collection box (23), a fixing block (25) is fixedly connected to the upper right side of the collection box (23), a roller (26) is movably installed on the left side of the fixing block (25), a pressing plate (22) is movably connected to the left side of the roller (26), the top of the pressing plate (22) is connected to the base plate (13), so that the base plate (13) moves left and right along the outer surface of the limiting rod (19) by the slider (20), and the front and rear sides of the separation box (6) are... Each of the two boxes is fixedly connected to a support block 1 (27) located below the connecting frame (10). The front and rear sides of the separation box (6) are fixedly connected to a support block 2 (28) located below the support block 1 (27). A round rod (29) is fixedly connected between the support block 1 (27) and the support block 2 (28). A movable block (30) is movably sleeved on the outer surface of the round rod (29). A baffle (31) that contacts the left side of the separation box (6) is fixedly connected to the left side of the movable block (30). A spring 2 (32) is sleeved on the outer surface of the round rod (29). One end of the spring 2 (32) is connected to the support block 1 (27), and the other end of the spring 2 (32) is connected to the movable block (30).

2. The concrete spraying device for underground engineering according to claim 1, characterized in that: The connecting block (11) is provided with a limiting rod (19) inside. A slider (20) is movably sleeved on the outer surface of the limiting rod (19). The inner side of the slider (20) is connected to the base plate (13).

3. A concrete spraying device for underground engineering according to claim 2, characterized in that: A spring (21) is sleeved on the outer surface of the limiting rod (19). One end of the spring (21) is connected to the slider (20), and the other end of the spring (21) is connected to the right side inside the connecting block (11).

4. A concrete spraying device for underground engineering according to claim 1, characterized in that: A connecting plate 1 (33) is fixedly connected to the right side of the movable block (30), and a connecting plate 2 (34) is movably latched above the connecting plate 1 (33). The upper inner side of the connecting plate 2 (34) is fixedly connected to the connecting frame (10).

5. A shotcreting method using the concrete shotcreting device for underground engineering according to any one of claims 1-4, characterized in that, The shotcrete operation steps are as follows: S1: Select an extension pipe of the appropriate length according to the range and distance of the spraying, and connect it to the spray pipe (5), and then connect the nozzle to the extension pipe; S2: Pour the mixed concrete mortar into the interior of the separation box (6) through the upper left side of the separation box (6). At this time, the stones in the concrete mortar are filtered through the filter screen (12) and placed above the filter screen (12), so that the concrete mortar enters the interior of the centrifugal mechanism (3) through the funnel (4). At the same time, the stones will slide to the top of the bottom plate (13) to separate the concrete mortar from the stones. S3: After the concrete mortar enters the centrifugal mechanism (3) through the funnel (4), the rotor inside the centrifugal mechanism (3) is driven to rotate at high speed by the electrical control box body (2). The feeder pushes the concrete mortar and injects it into the straight material cavity of the rotor body. At this time, the concrete mortar will be subjected to centrifugal action. S4: The material in the material chamber is brought into the nozzle (5) by the action of centrifugal force, and then enters the extension tube through the nozzle (5) and is finally sprayed out through the nozzle.

Images