Spraying robot nozzle pipe capable of reducing raised dust and waste

Abstract

The invention provides a guniting robot nozzle pipe capable of reducing raised dust and waste, which comprises a main spray pipe and an airflow outer pipe sleeving the outer side of the main spray pipe, an airflow channel is arranged between the inner wall of the airflow outer pipe and the outer wall of the main spray pipe, one end of the airflow outer pipe far away from the output end of the main spray pipe is a bottom end, and the other end of the airflow outer pipe is a top end. The bottom end of the outer airflow pipe is connected with the outer wall of the main spray pipe in a sealed mode, and an air inlet used for being connected with external inflation equipment is formed in the bottom end of the outer airflow pipe. The outer airflow pipe is arranged to form the annular airflow layer on the periphery of the mortar jet flow, when part of mortar located in the mortar jet flow is dissipated outwards, the part of mortar collides with the annular airflow layer outside the mortar jet flow and is blown to the roadway wall by the airflow layer, and therefore mortar dissipation is avoided, the working environment is improved, and the working efficiency is improved. The pathogenic risk of operators is reduced, and meanwhile, the waste of mortar is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of liquid spray heads, in particular to a spray head pipe of a spraying robot capable of reducing dust and waste. Background Art

[0002] Tunnel excavation refers to the work of excavating wells, tunnels, and caves of various shapes, sections, or crisscrossing in rock (soil) layers or mineral layers. In the tunnel, a shotcrete machine is needed to spray mortar on the inner wall of the mined tunnel to make the inner wall of the tunnel have a certain strength to meet the needs of subsequent operations.

[0003] As national policies encourage the intelligent construction of coal mines, the development of mine shotcrete robots has been promoted. It can improve work efficiency, reduce labor costs, and ensure worker safety and shotcrete quality. However, during the spraying process of mortar, the current spraying robot nozzle structure will cause the mortar on the edge of the mortar spray to fly away from the spray, forming suspended cement dust, which is easily inhaled by nearby personnel (mainly spraying operators), causing pneumoconiosis or other respiratory diseases in the operators. And as the mortar will fly away from the spray, the mortar that should have been sprayed on the tunnel wall will dissipate elsewhere, also causing mortar waste. Summary of the invention

[0004] The main purpose of the present invention is to provide a spraying robot nozzle pipe that can reduce dust and waste, so as to solve the problems in the prior art that mortar at the edge of the mortar jet will fly away from the jet to form suspended cement dust, affecting the health of the operator, and causing waste of mortar due to mortar dispersion.

[0005] In order to solve the above problems, the present invention adopts the following technical solution: a spraying robot nozzle pipe that can reduce dust and waste, comprising a main nozzle and an airflow outer tube sleeved on the outside of the main nozzle, an airflow channel is provided between the inner wall of the airflow outer tube and the outer wall of the main nozzle, the end of the airflow outer tube away from the output end of the main nozzle is the bottom end, the bottom end of the airflow outer tube is sealed and connected to the outer wall of the main nozzle, and the bottom end of the airflow outer tube is provided with an air inlet for connecting to an external inflation device.

[0006] Furthermore, the inner wall of the airflow outer tube is gradually tapered from the bottom end to the top end of the airflow outer tube.

[0007] Furthermore, a connecting portion is extended from the bottom end of the airflow outer tube, a free end of the connecting portion extends obliquely downward in a direction close to the main nozzle, and is fixedly connected to the main nozzle, and the air inlet is arranged on the connecting portion.

[0008] Furthermore, the top end of the air flow outer tube is at a preset distance from the free end of the main nozzle.

[0009] Furthermore, a plug is detachably connected to the outer side wall of the top end of the outer airflow tube, and a gap is provided between the inner wall of the plug and the free end of the main nozzle.

[0010] Furthermore, an annular groove is provided on the bottom surface of the plug, and an annular rubber ring is placed in the annular groove. When the plug is connected to the airflow outer tube, the side of the annular rubber ring away from the annular groove abuts against the airflow outer tube.

[0011] Furthermore, an annular plate is fixedly provided on the outer side wall of the air flow outer tube, the cross section of the plug is in the shape of a "X", the bottom end of the plug is fixedly connected to the annular plate by bolts, and the annular rubber ring abuts against the annular plate.

[0012] The beneficial effects of the present invention are: 1. By setting an outer airflow pipe, an annular airflow layer is formed on the periphery of the mortar jet. When part of the mortar in the mortar jet escapes outward, it will hit the annular airflow layer outside the mortar jet and be blown to the tunnel wall by the airflow layer, thereby preventing the mortar from escaping, improving the working environment, reducing the risk of illness for operators, and reducing the waste of mortar; 2. By gradually reducing the inner wall of the airflow outer tube from the bottom to the top, the annular airflow layer can be made more stable within a certain distance to further prevent the mortar from dispersing; 3. By setting a plug, when the shotcrete spraying operation is completed, the compressed air can be blown back into the main nozzle through the gap to blow back the sticky residual mortar in the main nozzle, thereby realizing the recovery operation and reducing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] Figure 1 A three-dimensional diagram of a spraying robot nozzle pipe capable of reducing dust and waste according to the present invention; Figure 2 It is a structural schematic diagram of the working state of the spraying robot nozzle pipe capable of reducing dust and waste according to the present invention; Figure 3 This is a schematic structural diagram of the spraying robot nozzle pipe installation plugging state that can reduce dust and waste according to the present invention; Figure 4 It is a structural schematic diagram of the spraying robot nozzle pipe back-blowing mortar state which can reduce dust and waste according to the present invention; Figure 5 The present invention is a schematic diagram of the three-dimensional structure of the plug of the nozzle pipe of the spraying robot which can reduce dust and waste.

[0015] Description of Reference Numerals 1. Main nozzle; 11. Output end; 2. Air flow outer tube; 21. Bottom end; 22. Top end; 23. Air inlet; 24. Connecting part; 3. Clamping convex ring; 4. Air flow channel; 5. Mortar jet; 6. Air flow layer; 7. Plug; 71. Annular groove; 72. Annular rubber ring; 8. Gap; 9. Annular plate. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiment of the present invention is described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0017] See also Figure 1 to Figure 2 As shown, a spraying robot nozzle pipe that can reduce dust and waste includes a main nozzle 1 and an airflow outer tube 2, wherein the main nozzle 1 is a cylindrical tube with a hollow interior, used to transport mortar, one end of the main nozzle 1 is fixedly provided with a clamping convex ring 3, used to connect with the spraying robot in the prior art, and the other end of the main nozzle 1 is an output end 11. The airflow outer tube 2 is sleeved on the outside of the main nozzle 1, and the central axis of the airflow outer tube 2 is colinear with the central axis of the main nozzle 1, and an airflow channel 4 is provided between the inner wall of the airflow outer tube 2 and the outer wall of the main nozzle 1, which is used to transport high-pressure gas, one end of the airflow outer tube 2 away from the output end 11 of the main nozzle 1 is a bottom end 21, and the other end is a top end 22, the bottom end 21 of the airflow outer tube 2 is sealed and connected to the outer wall of the main nozzle 1, and the bottom end 21 of the airflow outer tube 2 is provided with an air inlet 23 for connecting with an external inflation device.

[0018] During implementation, the staff connects the main nozzle 1 with the spraying robot through the clamping convex ring 3, and then passes the pressurized mortar into the main nozzle 1 through the spraying robot. The main nozzle 1 sprays the mortar to form a mortar jet 5. At the same time, it is connected to the air inlet 23 through an external inflation device (not shown in the figure) to output compressed air to the air flow channel 4. At this time, the compressed air is sprayed out through the top 22 of the air flow outer tube 2 to form an annular air flow layer 6 on the periphery of the mortar jet 5. When part of the mortar in the mortar jet 5 escapes outward, it will collide with the annular air flow layer 6 on the outside of the mortar jet 5 and be blown to the tunnel wall by the air flow layer 6, thereby avoiding the escape of mortar, improving the working environment, reducing the risk of illness for operators, and reducing the waste of mortar.

[0019] See also Figure 2As shown, in this embodiment, the inner wall of the airflow outer tube 2 is tapered from the bottom end 21 of the airflow outer tube 2 to the top end 22. In this way, the cross-sectional area of ​​the bottom of the airflow channel 4 is larger than the cross-sectional area of ​​the top surface of the airflow channel 4. According to the Bernoulli principle, the speed of the gas will increase when passing through a narrow opening, causing the wind to continue to maintain a certain speed and directionality after leaving the channel. Therefore, by tapering the inner wall of the airflow outer tube 2 from the bottom end 21 of the airflow outer tube 2 to the top end 22, the annular airflow layer 6 can be made more stable within a certain distance, further preventing the mortar from dissipating.

[0020] In this embodiment, the top end 22 of the air flow outer tube 2 is at a preset distance from the free end of the main nozzle 1. Specifically, the distance can be adjusted according to the actual ejection pressure of the compressed air. Thus, when the compressed air in the air flow channel 4 is blown out, the flow direction of the compressed air can be restricted by the outer side wall of the output end 11 of the main nozzle 1, so that the air flow remains in a ring shape, thereby preventing the air flow from moving toward the central axis of the main nozzle 1.

[0021] In this embodiment, a connecting portion 24 is extended from the bottom end 21 of the airflow outer tube 2, and the free end of the connecting portion 24 extends obliquely downward in a direction close to the main nozzle 1 (in a direction away from the free end of the main nozzle 1), and is fixedly connected to the main nozzle 1. In this embodiment, the free end of the connecting portion 24 is welded to the outer wall of the main nozzle 1 to ensure the fixing strength of the airflow outer tube 2 and the main nozzle 1.

[0022] Preferably, the air inlet 23 is arranged on the connecting portion 24. In this embodiment, the angle between the inner wall of the connecting portion 24 and the outer wall of the main nozzle 1 is about 45 degrees. It should be noted that the external inflation device is generally connected to the air inlet 23 through a connecting pipe in the prior art, and by tilting the connecting portion 24, an acute angle is formed between the central axis of the connecting pipe and the central axis of the main nozzle 1, which is more convenient for the staff to operate relative to the right angle or obtuse angle formed between the central axis of the connecting pipe and the central axis of the main nozzle 1.

[0023] See also Figure 3 to Figure 4 As shown, in another embodiment of the present invention, a plug 7 is detachably connected to the outer wall of the top end 22 of the airflow outer tube 2, and a gap 8 is provided between the inner wall of the plug 7 and the free end of the main nozzle 1, and the gap 8 is defined as a return air channel. During implementation, when the mortar jet stops after the spraying operation is completed, and there is residual mortar in the main nozzle 1, the staff will install the plug 7 on the top end 22 of the airflow outer tube 2, and then turn on the external air charging device to allow compressed air to enter the airflow channel 4 from the air inlet 23. Due to the obstruction of the plug 7, the compressed air entering the airflow channel 4 is blown back from the return air channel into the main nozzle 1, thereby blowing back the sticky residual mortar in the main nozzle 1, realizing the recycling operation and reducing waste.

[0024] Specifically, an annular plate 9 is fixedly arranged on the outer side wall of the air flow outer tube 2, and the plug 7 is detachably connected to the annular plate 9. The specific connection method can adopt screw connection, snap connection, etc. in the prior art, and is not limited to the specific structure cited in this embodiment. Preferably, in this embodiment, the cross section of the plug 7 is in a shape like the Chinese character 'ji', and the bottom end of the plug 7 and the annular plate 9 can be fixedly connected by bolts. Preferably, the cross section of the plug 7 can be in a shape like the Chinese character 'tong' (not shown in the figure). External threads are provided on the outer side wall of the annular plate 9, and internal threads adapted to the external threads are provided at the bottom end of the plug 7. Thereby, the plug 7 is screwed to the air flow outer tube 2.

[0025] Please refer to Figure 5 As shown, preferably, an annular groove 71 is provided on the bottom surface of the plug 7, and an annular rubber ring 72 is placed in the annular groove 71. After the plug 7 is connected to the air flow outer tube 2, the side of the annular rubber ring 72 away from the annular groove 71 abuts against the air flow outer tube 2, that is, the radial two sides of the annular rubber ring 72 respectively abut against the annular groove 71 and the annular plate 9 to better realize the sealed connection between the plug 7 and the air flow outer tube 2.

[0026] When the present invention is specifically implemented, the staff fixes one end of the main spray pipe 1 to the shotcrete robot, and then starts the shotcrete robot to spray mortar. At the same time, it is communicated with the air inlet 23 through an external inflation device, and compressed air is ejected from the top end 22 of the air flow outer tube 2 to form an annular air flow layer 6 around the mortar spray 5. When a part of the mortar in the mortar spray 5 escapes outward, it will hit the annular air flow layer 6 outside the mortar spray 5 and be blown to the roadway wall by the air flow layer 6, thereby avoiding the escape of mortar, improving the working environment, reducing the risk of disease for operators, and reducing the waste of mortar at the same time.

[0027] After the shotcrete operation is completed, the staff installs the plug 7 at the top end 22 of the air flow outer tube 2, and then turns on the external inflation device to make the compressed air blow back into the main spray pipe 1 through the gap 8 (as Figure 4 shown by the arrow, which is the flow direction of the compressed air) to blow back the residual mortar adhered in the main spray pipe 1 to realize the recovery operation and reduce waste.

[0028] The above description content is only a preferred embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

Claims

1. A spraying robot nozzle pipe capable of reducing dust and waste, characterized in that: The invention comprises a main nozzle (1) and an airflow outer tube (2) sleeved on the outside of the main nozzle (1), an airflow channel (4) being provided between the inner wall of the airflow outer tube (2) and the outer wall of the main nozzle (1), an end of the airflow outer tube (2) away from the output end (11) of the main nozzle (1) being a bottom end (21), the bottom end (21) of the airflow outer tube (2) being sealedly connected to the outer wall of the main nozzle (1), and an air inlet (23) for connecting to an external inflation device being provided at the bottom end (21) of the airflow outer tube (2).

2. The spraying robot nozzle pipe capable of reducing dust and waste according to claim 1 is characterized in that: The inner wall of the airflow outer tube (2) is gradually tapered from the bottom end (21) to the top end (22) of the airflow outer tube (2).

3. The spraying robot nozzle pipe capable of reducing dust and waste according to claim 1 is characterized in that: A connecting portion (24) is provided extending from the bottom end (21) of the air flow outer tube (2), the free end of the connecting portion (24) extends obliquely downward in a direction close to the main nozzle (1) and is fixedly connected to the main nozzle (1), and the air inlet (23) is provided on the connecting portion (24).

4. The spraying robot nozzle pipe capable of reducing dust and waste according to claim 1 is characterized in that: The top end (22) of the air flow outer tube (2) is at a preset distance from the free end of the main nozzle (1).

5. The spraying robot nozzle pipe capable of reducing dust and waste according to claim 1 is characterized in that: A plug (7) is detachably connected to the outer wall of the top end (22) of the air flow outer tube (2), and a gap (8) is provided between the inner wall of the plug (7) and the free end of the main nozzle (1).

6. The spraying robot nozzle pipe capable of reducing dust and waste according to claim 5 is characterized in that: An annular groove (71) is provided on the bottom surface of the plug (7), and an annular rubber ring (72) is placed in the annular groove (71). When the plug (7) is connected to the airflow outer tube (2), the side of the annular rubber ring (72) away from the annular groove (71) abuts against the airflow outer tube (2).

7. The spraying robot nozzle pipe capable of reducing dust and waste according to claim 6 is characterized in that: An annular plate (9) is fixedly provided on the outer wall of the air flow outer tube (2); the cross section of the plug (7) is in the shape of a "F"; the bottom end (21) of the plug (7) is fixedly connected to the annular plate (9) by bolts; and the annular rubber ring (72) abuts against the annular plate (9).

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