Rotary spray head structure for improving efficiency of mold-building sprayed concrete

Abstract

The invention belongs to the technical field of sprayers, and particularly relates to a rotary sprayer structure capable of improving molding concrete spraying efficiency, the rotary sprayer structure comprises a mounting part and a discharge port, the surface of the mounting part is detachably connected with a fixing shell, the surface of the fixing shell fixedly communicates with a feeding bin, and a feeding assembly is arranged in the feeding bin; a rotating assembly for controlling a discharging port to intermittently rotate to spray concrete to a mold is arranged in the fixing shell, a transmission shaft is driven by a motor to rotate, the transmission shaft and a second incomplete gear are matched to rotate to intermittently drive a gear ring to rotate, and the gear ring can drive the whole feeding assembly to rotate. According to the concrete spraying device, concrete can be intermittently and rotationally sprayed out from the interior of the discharging opening, the situation that new concrete impacts concrete on the bottom layer when thick concrete is sprayed in a layered mode can be avoided, the concrete spraying quality can be improved, and therefore the efficiency of mold building concrete spraying is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of spray nozzles, and specifically relates to a rotary nozzle structure for improving the efficiency of shotcrete in cast-in-place spraying. Background Technique

[0002] Shotcrete in cast-in-place spraying is usually used in projects such as tunnel and mine support. The concrete material is sprayed onto the structure surface at high speed through a spray gun to form a support layer. When spraying shotcrete, traditional nozzles may have problems such as uneven coverage, many dead corners, high rebound rate, and large dust. The rotary nozzle rotates, which may make the concrete distribution more uniform, improve the density, reduce the rebound, improve the material utilization rate, reduce the cost, and the rotation may also help to control the spraying direction and range, improve the construction efficiency, especially when constructing on large-area or curved surfaces, reducing the frequency of manually adjusting the nozzle.

[0003] In the current prior art, when using a rotary nozzle for shotcrete in cast-in-place spraying in a tunnel, when the thickness of the sprayed concrete is relatively thick, it is necessary to spray the concrete in layers to avoid the phenomenon of sagging due to excessive spraying at one time. When spraying in layers, continuous spraying will cause the underlying unhardened concrete to be impacted and fall off, and there will also be an interlayer defect (insufficient bonding force or local collapse) between the underlying layer and the newly sprayed concrete. Therefore, the present invention provides a rotary nozzle structure for improving the efficiency of shotcrete in cast-in-place spraying. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background technique.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A rotary nozzle structure for improving the efficiency of shotcrete in cast-in-place spraying according to the present invention includes a mounting member and a discharge port. A fixed shell is detachably connected to the surface of the mounting member. A feed bin is fixedly communicated with the surface of the fixed shell. A feeding assembly is arranged inside the feed bin. A rotating assembly for controlling the discharge port to rotate intermittently for shotcrete in cast-in-place spraying is configured inside the fixed shell;

[0006] The rotating assembly includes a motor. The output end of the motor is fixedly connected to a transmission shaft. A belt is connected to the surface of the transmission shaft through belt pulleys. The belt is connected to a first incomplete gear through belt pulleys. A second incomplete gear is fixedly connected to the lower end of the transmission shaft. A gear ring is meshed with the surfaces of the first incomplete gear and the second incomplete gear. A limiting cylinder is fixedly connected to the surface of the gear ring. A fixed cylinder is fixedly connected to the outside of the limiting cylinder. A rotating shaft is fixedly connected below the gear ring.

[0007] Preferably, a limiting plate is fixedly connected above the fixed cylinder. A plurality of spring limiting rods are arranged inside the limiting plate. A plurality of limiting holes are formed on the surface of the limiting cylinder, and the bottom of the spring limiting rod is in sliding contact with the surface of the limiting cylinder under the action of the spring.

[0008] Preferably, the feeding bin includes a feeding port. The feeding assembly includes a feeding pipe. A baffle is fixedly connected to the end face of the feeding pipe. The outer surface of the baffle is closely attached to the inner surface of the feeding bin. A spiral plate is detachably connected inside the feeding pipe, and a fixing plate is detachably connected directly below the feeding pipe.

[0009] Preferably, a first connecting member for guiding the concrete is arranged below the feeding assembly. The first connecting member includes a first connecting pipe. An adjusting plate is rotatably connected inside the first connecting pipe through a pin shaft. A plurality of arc-shaped strips are fixedly connected to the surface of the adjusting plate, and an adjusting arc rod is arranged on the side of the adjusting plate.

[0010] Preferably, the motor drives the second incomplete gear to engage and drive the gear ring to rotate through a transmission shaft. The transmission shaft is rotatably connected to the limiting plate. The motor is fixedly connected to the fixed shell. A sealing gasket is arranged between the feeding assembly and the fixed cylinder.

[0011] Preferably, the whole feeding assembly is arranged inside the fixed shell. The concrete injected into the feeding bin is conveyed into the feeding pipe under the action of gravity and the injection into it. The feeding port and the inside of the feeding bin are in through connection.

[0012] Preferably, the adjusting arc rod drives the adjusting plate to adjust the angle around the pin shaft inside the first connecting pipe. The inclination directions of the arc-shaped strips on the surface of the adjusting plate are the same. The lower end of the first connecting pipe is fixedly connected to the discharge port.

[0013] Preferably, the first incomplete gear is rotatably connected to the limiting plate. A sealing gasket is also arranged between the rotating shaft and the feeding assembly. The limiting cylinder drives the spring limiting rod to slide up and down inside the limiting plate. Both the spring limiting rod and the limiting cylinder are made of wear-resistant materials.

[0014] Preferably, the spiral plates are inclined in different directions inside the feeding pipe. The inclination direction of the fixing plate is consistent with the rotation direction of the discharge port. The air flow drives the concrete to be conveyed inside the feeding pipe under high pressure. The spiral plates and the fixing plate are made of high-strength materials.

[0015] Preferably, the adjusting plates are symmetrically arranged inside the first connecting pipe. The adjusting plates and the arc-shaped strips are made of materials with high wear resistance. One end of the adjusting arc rod is arranged inside the first connecting pipe.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. For the rotary nozzle structure for improving the efficiency of cast-in-place shotcrete of the present invention, the drive shaft is rotated by the electric motor, and the drive shaft and the second incomplete gear cooperate to rotate intermittently to drive the gear ring to rotate. The gear ring can drive the whole feeding assembly to rotate, enabling the concrete to be intermittently ejected from the inside of the discharge port in a rotating manner, avoiding the impact of the new concrete on the underlying concrete when spraying relatively thick concrete in layers, improving the quality of concrete spraying, and thus improving the efficiency of cast-in-place shotcrete.

[0018] 2. For the rotary nozzle structure for improving the efficiency of cast-in-place shotcrete of the present invention, the rotation of the feeding assembly can not only intermittently spray the concrete onto the cast-in-place through the discharge port, but also effectively avoid the blockage during the concrete spraying process, improve the efficiency of concrete spraying, and through the setting of the first connecting piece, the shape of the concrete sprayed on the cast-in-place can be effectively improved, avoiding a large amount of rebound after the concrete is sprayed, which affects the overall quality of concrete spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is the three-dimensional view of the nozzle of the present invention after installation;

[0021] Figure 2 is the internal structure schematic diagram of the present invention with some mounting parts removed;

[0022] Figure 3 is the structure schematic diagram of the rotating assembly of the present invention;

[0023] Figure 4 is the exploded view of the rotating assembly of the present invention;

[0024] Figure 5 is the structure schematic diagram of the feeding assembly of the present invention;

[0025] Figure 6 is the exploded view of the feeding assembly of the present invention;

[0026] Figure 7 is the structure schematic diagram of the spiral plate and the feed pipe of the present invention;

[0027] Figure 8 is in the present invention Figure 7 top view;

[0028] Figure 9 is the internal structure schematic diagram of the first connecting piece of the present invention;

[0029] In the figure: 1. Mounting piece; 2. Fixed shell; 3. First connecting piece; 301. First connecting pipe; 302. Adjusting plate; 303. Arc bar; 304. Adjusting arc rod; 4. Feeding bin; 401. Feeding port; 5. Rotating assembly; 501. Motor; 502. Transmission shaft; 503. Belt; 504. First incomplete gear; 505. Gear ring; 506. Limiting plate; 507. Spring limiting rod; 508. Limiting cylinder; 509. Rotating shaft; 510. Second incomplete gear; 511. Fixed cylinder; 6. Feeding assembly; 601. Feeding pipe; 602. Baffle; 603. Spiral plate; 604. Fixed plate; 7. Discharge port. Detailed implementation manners

[0030] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0031] As Figures 1 to 4 shown, a rotating nozzle structure for improving the efficiency of shotcrete in lining construction according to an embodiment of the present invention includes a mounting piece 1 and a discharge port 7. A fixed shell 2 is detachably connected to the surface of the mounting piece 1. A feeding bin 4 is fixedly communicated with the surface of the fixed shell 2. A feeding assembly 6 is arranged inside the feeding bin 4. A rotating assembly 5 for controlling the discharge port 7 to rotate intermittently for shotcrete in lining construction is configured inside the fixed shell 2;

[0032] The rotating assembly 5 includes a motor 501. The output end of the motor 501 is fixedly connected to a transmission shaft 502. The surface of the transmission shaft 502 is connected to a belt 503 through pulley transmission. The belt 503 is connected to a first incomplete gear 504 through pulley transmission. The lower end of the transmission shaft 502 is fixedly connected to a second incomplete gear 510. A gear ring 505 is meshed with the surfaces of the first incomplete gear 504 and the second incomplete gear 510. A limiting cylinder 508 is fixedly connected to the surface of the gear ring 505. A fixed cylinder 511 is fixedly connected to the outside of the limiting cylinder 508. A rotating shaft 509 is fixedly connected below the gear ring 505.

[0033] The present invention takes into account that when shotcrete is applied to a cast-in-place structure, the shotcrete efficiency needs to comprehensively consider construction speed, material utilization rate, quality stability, equipment wear, etc. Therefore, it is not the case that a fast spraying speed means a fast shotcrete efficiency for a cast-in-place structure. Therefore, existing nozzles generally use a continuous feeding and spraying method to spray concrete onto the cast-in-place structure during rotary spraying. When relatively thick concrete needs to be sprayed, a layered spraying method needs to be adopted. When new concrete is sprayed after the bottom layer of concrete has been sprayed, the concrete sprayed by the nozzle at this time will impact the unhardened concrete at the bottom layer, causing it to fall off. Therefore, first, an external mobile machine is connected to the mounting member 1, and at the same time, an external feeding pipe is connected to the feeding bin 4 to ensure continuous feeding of concrete. Then, the concrete is transported to the discharge port 7 through the feeding assembly 6 and is sprayed onto the surface of the cast-in-place structure under the action of high-pressure air flow to form a concrete layer;

[0034] It should be noted that when the concrete is injected into the feeding assembly 6 through the feeding bin 4, the motor 501 is started to rotate at this time, driving the transmission shaft 502 to rotate. The rotation of the transmission shaft 502 drives the rotation of the second incomplete gear 510. The rotation of the second incomplete gear 510 can engage and drive the gear ring 505 to rotate intermittently. The rotation of the gear ring 505 can drive the rotation of the rotating shaft 509. The rotation of the rotating shaft 509 can drive the entire feeding assembly 6 to rotate inside the feeding bin 4. Since multiple groups of feeding holes are provided on the surface of the feeding assembly 6, when the feeding holes on the surface of the feeding assembly 6 are aligned with the discharge holes provided inside the feeding bin 4, the concrete will be transported into the feeding assembly 6 at this time and then transported by the feeding assembly 6 to the inside of the discharge port 7, and the concrete is sprayed out under high-pressure air flow;

[0035] It should be noted again that when the transmission shaft 502 rotates, it will also drive the belt 503 to rotate through a pulley. The rotation of the belt 503 can drive the rotation of the first incomplete gear 504 through a pulley. After the second incomplete gear 510 engages and drives the gear ring 505 to rotate, the first incomplete gear 504 will continue to engage with the gear ring 505 to continue driving the gear ring 505 to rotate. However, when the second incomplete gear 510 disengages from the gear ring 505 at this time, the first incomplete gear 504 will not directly engage with the gear ring 505. At this time, the gear ring 505 will rotate "intermittently" to drive the entire feeding assembly 6 to rotate, causing the concrete flow rate to also be injected into the feeding assembly 6 "intermittently", so that the concrete is transported from the inside of the feeding assembly 6 to the discharge port 7 in a "segmented" manner and sprayed onto the cast-in-place structure. On the one hand, it can avoid the newly sprayed concrete from impacting the unhardened concrete during layered spraying, enabling the concrete to bond together better and improving the quality of the concrete sprayed under high-speed rotation;

[0036] It should be further noted that when the rotating shaft 509 drives the feeding assembly 6 to rotate, the feeding assembly 6 will also drive the discharge port 7 to rotate, so that the concrete is ejected from the inside of the discharge port 7 in a rotating manner under high pressure, enabling the concrete to be evenly sprayed onto the top surface of the tunnel. And since the nozzle is integrally installed on the surface of the mounting member 1, when the concrete is sprayed, it can spray the top surface of the tunnel in all directions, and the efficiency of concrete spraying is relatively high;

[0037] It should be further noted that when it is necessary to control the amount of concrete injection, at this time, only the rotation speed of the motor 501 needs to be adjusted, so as to control the meshing speed of the first incomplete gear 504 and the second incomplete gear 510 with the gear ring 505, and the amount of concrete ejected from the discharge port 7 can be controlled, avoiding defects between the new concrete and the bottom layer due to excessive spraying, and effectively improving the quality of the concrete sprayed onto the cast-in-place concrete.

[0038] As Figures 3 to 4 shown, a limiting plate 506 is fixedly connected above the fixed cylinder 511. A plurality of spring limiting rods 507 are arranged inside the limiting plate 506. A plurality of limiting holes are formed on the surface of the limiting cylinder 508, and the bottom of the spring limiting rod 507 is in sliding contact with the surface of the limiting cylinder 508 under the action of the spring.

[0039] During operation, when the first incomplete gear 504 and the second incomplete gear 510 cooperate and mesh to drive the gear ring 505 to rotate intermittently, at this time, since there will be a short disengagement between the first incomplete gear 504 and the second incomplete gear 510 and the gear ring 505, at this time, under the power transmission of the first incomplete gear 504 or the second incomplete gear 510, when the gear ring 505 drives the feeding assembly 6 to rotate through the rotating shaft 509, since there may be residual concrete in the feeding assembly 6 that has not been ejected through the discharge port 7, when the feeding assembly 6 rotates, the concrete driven by it may continue to drive the gear ring 505 to rotate under the action of inertia. At this time, a gap may appear between the feeding hole on the surface of the feeding assembly 6 and the discharge hole inside the feeding bin 4, resulting in concrete leakage. Therefore, by providing a plurality of limiting holes on the surface of the limiting cylinder 508, when the gear ring 505 rotates intermittently, it can drive the limiting cylinder 508 to rotate. When the limiting cylinder 508 rotates, the surface will continuously connect with the bottom of the spring limiting rod 507. When the limiting cylinder 508 stops rotating, at this time, the lower end of the spring limiting rod 507 is just located in the limiting hole on the surface of the limiting cylinder 508 to limit the limiting cylinder 508 and make it stop rotating continuously, which can improve the stability of the gear ring 505 during intermittent rotation;

[0040] It should be noted that when the limiting cylinder 508 is rotating, the lower end of the spring limiting rod 507 will push the spring limiting rod 507 upward when it moves on the surface of the limiting cylinder 508. When the lower end of the spring limiting rod 507 is in the limiting hole formed on the surface of the limiting cylinder 508, the lower end of the spring limiting rod 507 will be inserted into the bottom surface of the limiting hole under the action of the spring provided on the surface, so that the lower end of the spring limiting rod 507 can always be in contact with the limiting cylinder 508, thereby quickly limiting the limiting cylinder 508 and improving the stability of the intermittent rotation of the gear ring 505.

[0041] It should be noted again that when the limiting cylinder 508 is rotating, since multiple groups of limiting holes are formed on its surface, and the gear ring 505 is driven to rotate by the meshing transmission of the first incomplete gear 504 and the second incomplete gear 510, the phenomenon that the limiting cylinder 508 is stuck will not occur when the lower end of the spring limiting rod 507 is inserted into the limiting hole during the rotation of the limiting cylinder 508. Moreover, the edge of the limiting hole on the surface of the limiting cylinder 508 is arc-shaped. When the lower end of the spring limiting rod 507 slides out of the limiting hole, the limiting cylinder 508 can easily lift the spring limiting rod 507, enabling it to continue to rotate intermittently with the gear ring 505, effectively avoiding the situation of concrete feeding leakage during the process of the gear ring 505 driving the feeding assembly 6 to rotate and spray through the rotating shaft 509, and improving the material utilization rate.

[0042] As Figures 5 to 8 shown, the feeding bin 4 includes a feeding port 401, the feeding assembly 6 includes a feeding pipe 601, a baffle 602 is fixedly connected to the end surface of the feeding pipe 601, the outer surface of the baffle 602 is closely attached to the inner surface of the feeding bin 4, a spiral plate 603 is detachably connected inside the feeding pipe 601, and a fixing plate 604 is detachably connected directly below the feeding pipe 601.

[0043] The present invention also takes into account that when the concrete enters the feeding bin 4 through the feeding port 401, the concrete will directly enter the inside of the feeding pipe 601 and then be driven by the high-pressure air flow to be ejected. However, when the concrete is directly transported through the feeding pipe 601 to the inside of the discharge port 7, a large amount of concrete may prevent the high-pressure air flow from quickly ejecting it through the position of the discharge port 7, resulting in residue inside the feeding pipe 601. Long-term accumulation will not only cause a large amount of concrete residue inside the feeding pipe 601, affecting subsequent concrete spraying, but also cause the amount of concrete ejected through the discharge port 7 to decrease time after time, affecting the quality of the overall shotcrete for the lining. Therefore, by arranging multiple sets of spiral plates 603 at the position of the feeding hole of the feeding pipe 601 in the feeding assembly 6, when the concrete enters the inside of the feeding pipe 601, since the spiral plates 603 are arranged in a spiral shape, the concrete will be "diverted" into the inside of the feeding assembly 6 at this time. On the one hand, it can avoid blockage when the concrete enters, and on the other hand, it can disperse the concrete to prevent it from entering the inside of the feeding pipe 601 in a "lump" shape and being unable to be completely driven by the high-pressure air flow to be ejected, which can improve the effect of concrete spraying;

[0044] It should be noted that when the "diverted" concrete enters the inside of the feeding assembly 6, the concrete will be pushed by the high-pressure air flow to move towards the position of the discharge port 7 at this time. Since multiple sets of spiral plates 603 are arranged inside the feeding pipe 601, when the spiral plates 603 "divide" the concrete into multiple strands and enter below the feeding pipe 601, in order to avoid segregation of the concrete after being "diverted" and affecting the quality of the concrete after spraying, therefore, by arranging multiple sets of fixing plates 604 inside the feeding pipe 601 and the fixing plates 604 are arranged obliquely, when the concrete flows out through the fixing plates 604 under the high-pressure air flow, the fixing plates 604 can guide the "diverted" concrete to flow out in an inclined manner, guiding the concrete to flow in a "spiral" shape and impact and mix together again, which can avoid segregation of the ejected concrete and affect the effect of shotcrete for the tunnel roof lining;

[0045] It should be noted again that when the concrete enters the inside of the feeding bin 4 through the feeding port 401, the concrete will then enter the inside of the feeding assembly 6 through the feeding bin 4. And because a baffle 602 that is closely attached to the inner side of the feeding bin 4 is arranged on the outer side of the feeding pipe 601, even if the feeding assembly 6 rotates at this time, the concrete will not leak, which can effectively improve the cleanliness inside the nozzle.

[0046] Such as Figure 9As shown, a first connecting member 3 for guiding concrete is arranged below the feeding assembly 6. The first connecting member 3 includes a first connecting pipe 301. An adjusting plate 302 is rotatably connected to the inside of the first connecting pipe 301 through a pin shaft. A plurality of arc-shaped strips 303 are fixedly connected to the surface of the adjusting plate 302, and an adjusting arc rod 304 is arranged on the side surface of the adjusting plate 302.

[0047] During operation, when the re-mixed concrete is conveyed from the inside of the feeding pipe 601 to the inside of the first connecting pipe 301, at this time, the concrete will contact the adjusting plate 302 when passing through the first connecting pipe 301. And because a plurality of arc-shaped strips 303 are arranged on the surface of the adjusting plate 302 and the arc-shaped strips 303 are inclined, at this time, the concrete will contact the arc-shaped strips 303 after passing through the surface of the adjusting plate 302 and be re-guided by the arc-shaped strips 303 to make it mixed, which can further improve the quality of the concrete sprayed out through the discharge port 7.

[0048] It should be noted that since the two adjusting plates 302 are arranged in a fan shape inside the first connecting pipe 301, during the flow of the concrete, the adjusting arc rod 304 can control the rotation of the adjusting plate 302 around the pin shaft inside the first connecting pipe 301. On the one hand, it can control the distance between the two adjusting plates 302, change the flow channel of the concrete, and thus change the amount of the concrete sprayed out through the discharge port 7, which is convenient for controlling the amount of the shotcrete. On the other hand, it can adjust the distance of the arc-shaped strips 303. By changing the included angle between the two arc-shaped strips 303, the inclination angle of the arc-shaped strips 303 inside the first connecting pipe 301 is changed, which can make the concrete be further mixed and then sprayed out through the discharge port 7, and can further ensure the quality of the concrete sprayed out and improve the overall efficiency of the concrete spraying.

[0049] It should be noted again that when the adjusting arc rod 304 drives the two adjusting plates 302 to adjust the angle, the two arc-shaped strips 303 can be freely adjusted. At this time, the included angle between the two arc-shaped strips 303 can be accurately controlled, which is convenient for guiding the flowing concrete. And the larger the included angle between the two arc-shaped strips 303 near the pin shaft position, the closer the ends of the two adjusting plates 302 are. It can effectively adjust the amount of the concrete sprayed, and at this time, the larger included angle of the ends of the two arc-shaped strips 303 near the pin shaft can make the flow channel of the fallen concrete smaller. Therefore, at this time, the concrete can be quickly rotated and sprayed out from the inside of the discharge port 7 under the drive of the high-pressure air flow, improving the efficiency of the shotcrete for the formwork lining.

[0050] Such as Figures 3 to 5As shown in the figure, the motor 501 drives the second incomplete gear 510 to engage and drive the gear ring 505 to rotate through the transmission shaft 502. The transmission shaft 502 is rotatably connected to the limit plate 506, and the motor 501 is fixedly connected to the fixed housing 2. A sealing gasket is provided between the feeding assembly 6 and the fixed cylinder 511.

[0051] During operation, when the second incomplete gear 510 engages and drives the gear ring 505 to rotate intermittently with the first incomplete gear 504, at this time, the intermittent rotation of the gear ring 505 drives the feeding assembly 6 to cause the concrete to be intermittently ejected from the inside of the discharge port 7. At this time, in order to prevent the concrete from leaking from the connection position between the fixed cylinder 511 and the baffle 602 and contacting the gear ring 505, by providing a sealing gasket between the fixed cylinder 511 and the feeding assembly 6, it can not only further improve the sealing effect during concrete spraying, but also avoid the leakage of high-pressure air flow, which affects the high-pressure air flow driving the concrete spraying, and can further improve the effect of concrete spraying;

[0052] It should be noted that when the first incomplete gear 504 and the second incomplete gear 510 intermittently drive the gear ring 505 to rotate, when the teeth on the surfaces of the first incomplete gear 504 and the second incomplete gear 510 are not engaged with the gear ring 505, at this time, the surfaces of the first incomplete gear 504 and the second incomplete gear 510 will contact the teeth of the gear ring 505. On the basis of the cooperation and limitation of the spring limit rod 507 and the limit cylinder 508, the gear ring 505 is limited again. Further improve the gear ring 505 during the intermittent rotation driving the discharge port 7 to rotate, and intermittently spray the concrete in a high-pressure state in a rotating manner, improving the concrete spraying efficiency while ensuring the effect of concrete spraying.

[0053] As Figures 5 to 6 shown, the feeding assembly 6 is integrally arranged inside the fixed housing 2. The concrete injected into the feeding bin 4 is conveyed into the inside of the feeding pipe 601 under the action of gravity and the injection into it. The feeding port 401 and the inside of the feeding bin 4 are in through connection.

[0054] During operation, when the concrete is injected into the feeding bin 4, at this time, the concrete will tend to move downward under the action of gravity. And since it is the time to spray the cast-in-place concrete on the top surface of the tunnel at this time, when the discharge hole and the feeding hole are in an overlapping state after the concrete enters the feeding bin 4, at this time, the concrete will not all enter the inside of the feeding pipe 601 from the inside of the feeding bin 4, and at this time, the feeding pipe 601 is in an intermittent rotation state as a whole. Therefore, it can prevent a large amount of concrete from entering the inside of the feeding pipe 601 from the inside of the feeding bin 4 and then being ejected, and can avoid the situation of blockage during the concrete spraying process;

[0055] It should be noted that when the feeding hole is about to overlap with the discharging hole, since the feeding hole is always in an open state, at this time, part of the concrete will flow into the interior of the feeding pipe 601 under the action of gravity or the pressure inside the feeding bin 4. Therefore, the concrete continuously enters the interior of the feeding pipe 601, which can prevent a large amount of concrete from entering simultaneously and causing blockage. And because the spiral directions of multiple groups of spiral plates 603 are not the same, when the concrete enters the interior of the feeding pipe 601 and is "diverted" by the spiral plates 603, it will "collide" together in different flow forms, enabling the "divided" concrete to be quickly mixed, and avoiding the segregation of the concrete due to being "diverted" for a long time;

[0056] It should be noted again that when the concrete needs to be transported from the feeding pipe 601 to the first connecting pipe 301 and then sprayed out through the discharging port 7, when the rotating feeding hole of the feeding pipe 601 does not overlap with the discharging hole at this time, high-pressure air flow will continuously inflate the interior of the feeding pipe 601. On the one hand, it can clean the concrete that has not been completely sprayed out, so that it is sprayed out of the interior of the feeding pipe 601. On the other hand, when the feeding hole overlaps with the discharging hole, the interior of the feeding pipe 601 is in a state of rapid pressure relief, enabling the concrete to be "negatively pressured" into the interior of the feeding pipe 601, and quickly "diverted" and then quickly mixed.

[0057] As Figure 9 shown, the adjusting arc rod 304 drives the adjusting plate 302 to adjust the angle around the pin shaft inside the first connecting pipe 301. The inclined directions of the arc strips 303 on the surface of the adjusting plate 302 are the same, and the lower end of the first connecting pipe 301 is fixedly connected to the discharging port 7.

[0058] During operation, when the concrete is transported from the interior of the feeding pipe 601 to the position inside the first connecting pipe 301 under the action of high-pressure air flow, at this time, it is necessary to adjust the positions of the two groups of adjusting plates 302 in advance through the adjusting arc rod 304, so as to control the amount of concrete transported through the interior of the first connecting pipe 301 and sprayed out inside the discharging port 7. And through the setting of the adjusting plate 302, the concrete can be mixed again, so that the concrete is sprayed on the shotcrete in a high-pressure state;

[0059] It should be noted that since the inclined directions of the arc strips 303 set on the surface of the adjusting plate 302 are the same, when the concrete reaches the surface of the adjusting plate 302 and is guided by the arc strips 303, at this time, the arc strips 303 will guide the concrete in one direction, preventing the concrete from being sprayed out in a "dispersed" state when it is sprayed out from the interior of the discharging port 7, improving the spraying effect of the concrete, and avoiding a large amount of rebound when the concrete is sprayed onto the shotcrete surface in a "dispersed" state from the interior of the discharging port 7, thereby improving the quality of the concrete spraying.

[0060] As Figures 3 to 4As shown, the first incomplete gear 504 is rotationally connected to the limit plate 506, and a sealing gasket is also provided between the rotating shaft 509 and the feeding assembly 6. The limit cylinder 508 drives the spring limit rod 507 to slide up and down inside the limit plate 506. The spring limit rod 507 and the limit cylinder 508 are both made of wear-resistant materials.

[0061] During operation, when the transmission shaft 502 drives the belt 503 to rotate via the pulley, the belt 503 also drives one end of the first incomplete gear 504 to rotate inside the limit plate 506 via the pulley. At this time, the discharge port 7 can also rotate intermittently while the first incomplete gear 504 and the second incomplete gear 510 are continuously rotating, and concrete can be sprayed out from the inside of the discharge port 7 in an intermittent rotating state.

[0062] It should be noted that by arranging a sealing gasket between the rotating shaft 509 and the feeding assembly 6, when the rotating shaft 509 drives the feeding assembly 6 to rotate intermittently, it can also prevent the leakage of concrete from affecting the normal rotation of the gear ring 505 above the rotating shaft 509. The spring limit rod 507 and the limit cylinder 508 are both made of wear-resistant materials, which can reduce the wear caused by the spring limit rod 507 when sliding on the surface of the limit cylinder 508, and can effectively improve its service life and reduce the subsequent maintenance costs.

[0063] like Figures 5 to 7 As shown, the spiral plates 603 are tilted in different directions inside the feed pipe 601, and the tilt direction of the fixed plate 604 is consistent with the rotation direction of the discharge port 7. The airflow drives the concrete to be transported inside the feed pipe 601 under high pressure. The spiral plates 603 and the fixed plates 604 are made of high-strength materials.

[0064] During operation, when the concrete enters the interior of the feed pipe 601, the concrete will first be "diverted" by the spiral plate 603, which can prevent the concrete from being blocked inside the feed pipe 601. It should be noted that since the inclination direction of the fixed plate 604 is consistent with the rotation direction of the discharge port 7, when the feed pipe 601 passes the position of the fixed plate 604 during the rotation process, the concrete will be guided by the fixed plate 604 and transported to the interior of the first connecting pipe 301. At this time, the overall rotation of the feed pipe 601 can make the concrete fit better with the surface of the fixed plate 604, so that the concrete can be transported more smoothly to the interior of the first connecting pipe 301, and then rotated and sprayed out from the discharge port 7 below the first connecting pipe 301.

[0065] like Figure 9 As shown, the adjustment plate 302 is symmetrically arranged inside the first connecting tube 301 , the adjustment plate 302 and the arc bar 303 are made of a highly wear-resistant material, and one end of the adjustment arc rod 304 is arranged inside the first connecting tube 301 .

[0066] During operation, when the concrete passes through the fixed plate 604 and enters the interior of the first connecting pipe 301, the concrete will first come into contact with the arc-shaped strips 303 on the surface of the adjusting plate 302 and be guided by the arc-shaped strips 303 again, so that the concrete is conveyed to the position of the discharge port 7 in a "whole" state and sprayed out from the interior of the discharge port 7. Moreover, since the adjusting plate 302 and the arc-shaped strips 303 are made of materials with high wear resistance, it can prevent the adjusting plate 302 from being worn out quickly on the surface due to the impact force of the high-pressure air flow driving the concrete after the concrete is conveyed to the surface of the adjusting plate 302 through the interior of the feed pipe 601. This can improve the utilization rate of the adjusting plate 302 and the arc-shaped strips 303 inside the first connecting pipe 301, and has high practicability.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary nozzle structure for improving the efficiency of shotcrete, characterized in that: It includes a mounting part and a discharge port. A fixed shell is detachably connected to the surface of the mounting part. A feeding bin is fixedly communicated with the surface of the fixed shell. A feeding component is arranged inside the feeding bin. A rotating component configured to control the discharge port to rotate intermittently for shotcrete is arranged inside the fixed shell; The rotating component includes a motor. A transmission shaft is fixedly connected to the output end of the motor. A belt is connected to the surface of the transmission shaft through pulley transmission. The belt is connected to a first incomplete gear through pulley transmission. A second incomplete gear is fixedly connected to the lower end of the transmission shaft. A gear ring is meshed with the surfaces of the first incomplete gear and the second incomplete gear. A limiting cylinder is fixedly connected to the surface of the gear ring. A fixed cylinder is fixedly connected to the outside of the limiting cylinder. A rotating shaft is fixedly connected below the gear ring.

2. The rotary nozzle structure for improving the efficiency of shotcrete in lining construction according to claim 1, characterized in that: A limiting plate is fixedly connected above the fixed cylinder. A plurality of spring limiting rods are arranged inside the limiting plate. A plurality of limiting holes are formed in the surface of the limiting cylinder, and the bottom of the spring limiting rod is in sliding contact with the surface of the limiting cylinder under the action of the spring.

3. The rotary nozzle structure for improving the efficiency of shotcrete by casting is characterized in that, according to claim 1: The feeding bin includes a feeding port. The feeding component includes a feeding pipe. A baffle is fixedly connected to the end face of the feeding pipe. The outer surface of the baffle is closely attached to the inner surface of the feeding bin. A spiral plate is detachably connected inside the feeding pipe. A fixing plate is detachably connected directly below the feeding pipe.

4. A rotary nozzle structure for improving the efficiency of shotcrete in lining construction, as claimed in claim 1, wherein: A first connecting piece for guiding the concrete is arranged below the feeding component. The first connecting piece includes a first connecting pipe. An adjusting plate is rotatably connected to the inside of the first connecting pipe through a pin shaft. A plurality of arc-shaped strips are fixedly connected to the surface of the adjusting plate. An adjusting arc rod is arranged on the side surface of the adjusting plate.

5. A rotary nozzle structure for improving the efficiency of shotcrete by casting, characterized in that: The motor drives the second incomplete gear to drive the gear ring to rotate through meshing transmission. The transmission shaft is rotatably connected to the limiting plate. The motor is fixedly connected to the fixed shell. A sealing gasket is arranged between the feeding component and the fixed cylinder.

6. The rotary nozzle structure for improving the efficiency of shotcrete in lining construction according to claim 3, wherein: The whole feeding component is arranged inside the fixed shell. The concrete injected into the feeding bin is conveyed to the inside of the feeding pipe under the action of gravity and injection into it. The feeding port and the inside of the feeding bin are in through connection.

7. The rotary nozzle structure for improving the efficiency of shotcrete by casting, according to claim 4, is characterized in that: The adjusting arc rod drives the adjusting plate to adjust the angle around the pin shaft inside the first connecting pipe. The inclination directions of the arc-shaped strips on the surface of the adjusting plate are the same. The lower end of the first connecting pipe is fixedly connected to the discharge port.

8. A rotary nozzle structure for improving the efficiency of shotcrete in lining construction, as claimed in claim 1, wherein: The first incomplete gear is rotatably connected to the limiting plate. A sealing gasket is also arranged between the rotating shaft and the feeding component. The limiting cylinder drives the spring limiting rod to slide up and down inside the limiting plate. Both the spring limiting rod and the limiting cylinder are made of wear-resistant materials.

9. The rotary nozzle structure for improving the efficiency of shotcrete in lining construction according to claim 3, characterized in that: The spiral plates are inclined in different directions inside the feeding pipe. The inclination direction of the fixing plate is the same as the rotation direction of the discharge port. The air flow drives the concrete to be conveyed inside the feeding pipe under high pressure. The spiral plate and the fixing plate are made of high-strength materials.

10. The rotary nozzle structure for improving the efficiency of shotcrete by casting in place according to claim 4, characterized in that: The adjusting plates are symmetrically arranged inside the first connecting pipe. The adjusting plates and the arc-shaped strips are made of materials with high wear resistance. One end of the adjusting arc rod is arranged inside the first connecting pipe.

Images