A concrete nozzle assembly and a concrete spraying apparatus

Abstract

The application discloses a concrete nozzle assembly and a concrete spraying device, and relates to the field of concrete spraying devices.The concrete nozzle assembly comprises a discharging bin and a concrete nozzle, the discharging bin is connected with a concrete conveying pipe, an additive conveying pipe and a high-pressure gas pipe, and the concrete conveying pipe, the additive conveying pipe and the high-pressure gas pipe are all connected to the concrete nozzle.It is to be noted that in the embodiment of the application, if the nozzle is damaged or leaks during operation, the outer protective cover can protect the workers from the impact of the concrete;in addition, when the concrete conveying pipe is blocked, the T-shaped on-off frame can close the input ports of the additive and the high-pressure gas, and the additive and the high-pressure gas can enter two separated transfer boxes, and the blocking plate can be rotated to the front of the nozzle to block the sprayed concrete, so that the problem that the concrete cannot meet the spraying requirements due to the leakage of the nozzle and the concrete is still continuously sprayed on the working surface can be solved.

Description

Technical Field

[0001] This invention relates to the field of concrete spraying equipment technology, and more particularly to a concrete nozzle assembly and concrete spraying equipment. Background Technology

[0002] Shotcrete is a construction method that uses a pressure spray gun to spray and pour fine aggregate concrete. It is commonly used for pouring linings of thin-walled structures such as tunnel linings, walls, and ceilings, as well as protective layers for steel structures. Shotcrete is formed by loading pre-mixed cement, sand, gravel, water, and a certain amount of admixtures into a shotcrete machine, using high-pressure air to deliver the mixture to the nozzle and mix it with an accelerator, then spraying it at a high speed onto the surface of rock or concrete.

[0003] During shotcreting, concrete enters the concrete nozzle through a concrete delivery pipe and is then sprayed out through the nozzle. Simultaneously, additives and high-pressure gas are delivered through additive delivery pipes and high-pressure air pipes, spraying the concrete onto the work surface. It's important to note that shotcreting requires precise control over the spraying angle and pressure. Only by achieving these specifications can the quality of the shotcreting be guaranteed. However, the nozzle is a consumable part, typically made of plastic and mounted on the nozzle. During construction, the presence of aggregates in the concrete creates significant impact on the nozzle upon spraying, easily leading to breakage or loose connections causing leaks. This results in insufficient concrete pressure, preventing proper adhesion to the work surface. Furthermore, pipe blockages rapidly reduce the concrete flow, and the lack of preventative measures on the nozzle can also cause a large amount of substandard concrete to be sprayed onto the work surface, resulting in substandard work. Summary of the Invention

[0004] The purpose of this invention is to provide a concrete nozzle assembly and a concrete spraying device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A concrete nozzle assembly includes a discharge hopper and a concrete nozzle. The discharge hopper is connected to a concrete delivery pipe, an additive delivery pipe, and a high-pressure air pipe. The concrete delivery pipe, the additive delivery pipe, and the high-pressure air pipe are all connected to the concrete nozzle. A nozzle is movably mounted on the concrete nozzle.

[0007] It also includes a breakage separation device, which is installed on the concrete nozzle and is used to separate the additive delivery pipe and the high-pressure air pipe from the concrete nozzle. The breakage separation device includes a central support, which is installed on the concrete nozzle. An outer protective cover is installed on one side of the central support, and an end sealing plate is snapped onto one side of the outer protective cover. The nozzle is located inside the outer protective cover. Two separation transfer boxes are installed on the central support. The additive delivery pipe and the high-pressure air pipe are respectively connected to the two separation transfer boxes. A T-shaped through-and-out bracket is movably installed in each of the two separation transfer boxes.

[0008] It also includes a blocking and buffering device, which is installed on the breakage separation device. The blocking and buffering device is used to block and buffer the concrete sprayed from the nozzle. The blocking and buffering device includes two rotating brackets, which are respectively rotatably installed on both sides of the outer cover. A buffer rod is movably installed on each of the two rotating brackets. A blocking plate is connected between the two buffer rods. The rotation of the two rotating brackets drives the blocking plate to rotate through the two buffer rods, thereby blocking the concrete sprayed from the nozzle.

[0009] Furthermore, in a preferred embodiment of the present invention, the breakage separation device further includes four impact plates, all of which are located inside the outer protective cover. Active pushers are movably installed around the outer protective cover, and the four active pushers are respectively installed on the four impact plates.

[0010] A return spring is installed on the impact plate, and the other end of the return spring is installed on the inner wall of the outer protective cover.

[0011] Furthermore, in a preferred embodiment of the present invention, four adapter brackets are movably mounted on the centralized support, and a push ring is mounted on the four adapter brackets. The active push frame moves to push the push rings to move.

[0012] A transfer frame is installed on each of the four aforementioned adapter brackets, and two synchronous push frames are installed on each of the transfer frames, with a push column installed on each of the two synchronous push frames;

[0013] Both of the two separation transfer boxes are rotatably mounted with rotating push rods, and the two T-shaped switching frames are respectively movably mounted on the two rotating push rods. The movement of the two synchronous push frames is achieved by the two pushing columns driving the two rotating push rods to rotate, thereby driving the T-shaped switching frames to move.

[0014] Furthermore, in a preferred embodiment of the present invention, two sliding push shafts are rotatably mounted on the rotating push rod, one of the sliding push shafts is movably mounted inside the T-shaped through-and-break frame, and the other sliding push shaft is mounted on the separation transfer box.

[0015] Furthermore, in a preferred embodiment of the present invention, a closed bottom plate is installed on the bottom side of the T-shaped through-break frame, and the closed bottom plate is used to close the bottom side of the separation transfer box;

[0016] The T-shaped through-break frame has spring grooves on both sides, and spring clips are movably installed in both spring grooves. Spring clips and spring springs are installed on the inner walls of the spring grooves.

[0017] Furthermore, in a preferred embodiment of the present invention, a blockage separation device is installed on the breakage separation device, the blockage separation device being used to separate the additive delivery pipe and the high-pressure air pipe from the concrete nozzle;

[0018] The blockage separation device includes two pipe clamps, and two movement restriction grooves are provided on the central support. The two pipe clamps are slidably installed in the two movement restriction grooves respectively, and the two pipe clamps are clamped on the concrete delivery pipe.

[0019] Furthermore, in a preferred embodiment of the present invention, a return spring is installed on both sides of the pipe clamp, and one end of the two return springs that are far apart from each other is respectively installed on the inner walls of the two sides of the limiting movement groove.

[0020] The synchronous pusher is equipped with a concave push plate, and the pipe clamp is equipped with an L-shaped pusher. The movement of the pipe clamp drives the L-shaped pusher to push the concave push plate to move, thereby driving the synchronous pusher to move.

[0021] Furthermore, in a preferred embodiment of the present invention, a pull groove is provided on the rotating bracket, and a pull-back shaft is installed on one side of the adapter bracket, the pull-back shaft being movably installed in the pull groove;

[0022] A support shaft is rotatably mounted on the rotating bracket, and the support shaft is installed on one side of the outer protective cover.

[0023] Furthermore, in a preferred embodiment of the present invention, a buffer groove is provided on the rotating bracket, the buffer rod is movably installed in the buffer groove, and a buffer spring is installed between the buffer rod and the inner wall of the buffer groove;

[0024] A limiting base plate is installed on one side of the outer protective cover, and the rotation of the blocking plate is restricted by the limiting base plate.

[0025] In an embodiment of the present invention, a concrete spraying device is also provided, which includes the above-described concrete nozzle assembly.

[0026] The beneficial effects of the concrete nozzle assembly and concrete spraying equipment proposed in this invention are:

[0027] In this invention, by setting up a breakage separation device, if the nozzle is damaged or leaks during concrete spraying operations, it is sealed and protected by an outer protective cover to prevent concrete from impacting the workers. At the same time, the T-shaped through-and-out frame seals the input ports of the additive and high-pressure air, allowing the additive and high-pressure air to enter two separation transfer boxes. This prevents the problem of the concrete continuing to be sprayed onto the work surface even when the nozzle leaks and the concrete does not meet the spraying requirements. It also allows the workers to detect problems in a timely manner, thereby ensuring the quality of the concrete on the work surface and resolving technical problems promptly, thus ensuring the work efficiency of concrete spraying operations.

[0028] Furthermore, in this invention, by setting up a blockage separation device, if the concrete delivery pipe becomes blocked near or far from the concrete nozzle during the spraying process, the two pipe clamps will slide within the two restrictive movement grooves. The movement of the pipe clamps is achieved by the L-shaped pusher pressing the concave push plate, which in turn drives the transfer bracket to move synchronously, thereby causing the T-shaped switch to move. This achieves the purpose of the T-shaped switch sealing the input ports of the additive and high-pressure gas.

[0029] Furthermore, in this invention, by setting up a blocking and buffering device, when leakage occurs, the rotating bracket rotates, causing the blocking plate to rotate in front of the nozzle to block the sprayed concrete and prevent it from spraying onto the working surface. At the same time, the concrete impacts the blocking plate, causing the blocking plate to move within two buffer grooves via two buffer rods, and causing two buffer springs to be stressed. Therefore, under the rebound force of the two buffer springs, the two buffer rods pull the blocking plate to reset, buffering the sprayed concrete and ensuring the blocking effect. This effectively prevents substandard concrete from being sprayed onto the working surface, thus avoiding the problem of the working surface being unqualified and requiring rework. Attached Figure Description

[0030] Figure 1 A three-dimensional structural schematic diagram of a concrete nozzle assembly provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the connection between the concrete nozzle and the nozzle and other structures of a concrete spraying head assembly provided in an embodiment of the present invention.

[0032] Figure 3This is a structural diagram illustrating the connection between a centralized support and a rotating support for a concrete nozzle assembly, as provided in an embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram of the connection between the impact plate and the active pusher of a concrete nozzle assembly according to an embodiment of the present invention.

[0034] Figure 5 A schematic diagram illustrating the connection between the concrete nozzle and the centralized support structure of a concrete spraying head assembly provided in an embodiment of the present invention;

[0035] Figure 6 A schematic diagram illustrating the connection between a transfer bracket and a push ring, etc., of a concrete nozzle assembly according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram illustrating the connection between a separation transfer box and a T-shaped through-break frame for a concrete nozzle assembly, as provided in an embodiment of the present invention.

[0037] Figure 8 This is a cross-sectional structural diagram showing the connection between a separation transfer box and a T-shaped through-break frame of a concrete nozzle assembly, as provided in an embodiment of the present invention.

[0038] Figure 9 A concrete spray nozzle assembly provided in an embodiment of the present invention Figure 8 A schematic diagram of the structure of part A;

[0039] Figure 10 This is a partial structural diagram illustrating the connection between a centralized support and pipe clamp of a concrete nozzle assembly, as provided in an embodiment of the present invention.

[0040] Figure 11 This is a partial cross-sectional view of the connection between the rotating bracket and the pull-back shaft of a concrete nozzle assembly, as provided in an embodiment of the present invention.

[0041] In the diagram: 1-Discharge hopper; 2-Concrete nozzle; 3-Spray head; 4-Concrete delivery pipe; 5-Additive delivery pipe; 6-High-pressure air pipe; 7-Broken separation device; 701-Centralized support; 702-Outer protective cover; 703-End sealing plate; 704-Impact plate; 705-Active pusher; 706-Return spring; 707-Transfer support; 708-Separation transfer box; 709-T-type through-and-through frame; 710-Rotating push rod; 711-Sliding push shaft; 712-Synchronous pusher; 713-Push column; 714-Closed bottom plate; 715-Rebound groove; 716-Rebound lever; 717-Rebound spring; 718-Transfer frame; 719-Push ring; 8-Block separation device; 801-Pipe clamp; 802-Movement restriction groove; 803-Reset spring; 804-Concave push plate; 805-L-shaped push frame; 9-Blocking buffer device; 901-Rotating bracket; 902-Blocking plate; 903-Buffer pull rod; 904-Pull-back shaft; 905-Pull groove; 906-Support shaft; 907-Buffer groove; 908-Buffer spring; 909-Limiting base plate. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] Furthermore, in the description of this invention, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Furthermore, terms such as "horizontal," "vertical," and "perpendicular" do not imply that components must be absolutely vertical, but rather that they can be slightly tilted. For example, "vertical" simply means that its direction is more vertical relative to "horizontal," not that the structure must be completely vertical, but can be slightly tilted.

[0047] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Please refer to the attached instruction manual. Figures 1-2 This invention provides a concrete nozzle assembly, which includes a discharge hopper 1 and a concrete nozzle 2. The discharge hopper 1 is connected to a concrete conveying pipe 4, an additive conveying pipe 5 and a high-pressure air pipe 6. The concrete conveying pipe 4, the additive conveying pipe 5 and the high-pressure air pipe 6 are all connected to the concrete nozzle 2. A nozzle 3 is movably installed on the concrete nozzle 2.

[0049] Furthermore, please refer to the appendix to the instruction manual. Figures 3-9The concrete nozzle assembly provided in this embodiment of the invention further includes a breakage separation device 7, which is installed on the concrete nozzle 2. The breakage separation device 7 is used to separate the additive delivery pipe 5 and the high-pressure air pipe 6 from the concrete nozzle 2. Specifically, the breakage separation device 7 includes a central support 701, which is installed on the concrete nozzle 2. An outer protective cover 702 is installed on one side of the central support 701, and an end sealing plate 703 is snapped onto one side of the outer protective cover 702. The nozzle 3 is located inside the outer protective cover 702. Two separation transfer boxes 708 are installed on the central support 701. The additive delivery pipe 5 and the high-pressure air pipe 6 are respectively connected to the two separation transfer boxes 708. A T-shaped through-and-through bracket 709 is movably installed in each of the two separation transfer boxes 708. It should be noted that in this embodiment of the invention, if the nozzle 3 is damaged or leaks during concrete spraying, it is sealed and protected by the outer protective cover 702 to prevent the concrete from impacting the workers. At the same time, the T-shaped cut-off frame 709 seals the input ports of the additive and high-pressure air, and allows the additive and high-pressure air to enter the two separate transfer boxes 708, so as to prevent the problem of continuous spraying when the nozzle 3 leaks and the concrete does not meet the spraying requirements.

[0050] Furthermore, in this embodiment of the invention, a blocking and buffering device 9 is also included. The blocking and buffering device 9 is installed on the breakage separation device 7 and is used to block and buffer the concrete sprayed from the nozzle 3. Specifically, the blocking and buffering device 9 includes two rotating brackets 901, which are rotatably mounted on both sides of the outer protective cover 702. A buffer rod 903 is movably mounted on each of the two rotating brackets 901, and a blocking plate 902 is connected between the two buffer rods 903. The rotation of the two rotating brackets 901 drives the blocking plate 902 to rotate via the two buffer rods 903, thus blocking the concrete sprayed from the nozzle 3. It should be noted that in this embodiment of the invention, when the adapter bracket 707 moves, the rotating bracket 901 rotates, causing the blocking plate 902 to rotate in front of the nozzle 3, blocking the sprayed concrete and preventing substandard concrete from being sprayed onto the working surface.

[0051] Please continue to refer to the instruction manual appendix. Figures 3-9More specifically, the concrete nozzle assembly provided in this embodiment of the invention includes a breakage separation device 7 that further comprises four impact plates 704. All four impact plates 704 are located inside an outer protective cover 702. Active pushers 705 are movably installed around the perimeter of the outer protective cover 702, and the four active pushers 705 are respectively mounted on the four impact plates 704. A return spring 706 is installed on each impact plate 704, with the other end of the return spring 706 mounted on the inner wall of the outer protective cover 702. It should be noted that, in this embodiment of the invention, when the nozzle 3 breaks or leaks, the leaked gas or concrete is sprayed onto one or more impact plates 704, causing the impact plates 704 to move the active pushers 705 and thus retract the return springs 706.

[0052] More specifically, in this embodiment of the invention, four adapter brackets 707 are movably mounted on the central support 701, and push rings 719 are mounted on the four adapter brackets 707. The active pusher 705 moves to push the push rings 719 to move. A transfer frame 718 is mounted on the four adapter brackets 707, and two synchronous pushers 712 are mounted on the transfer frame 718. Each of the two synchronous pushers 712 is equipped with a pusher column 713.

[0053] Furthermore, each of the two separate transfer boxes 708 is rotatably mounted with a rotating push rod 710, and two T-shaped shut-off frames 709 are movably mounted on the two rotating push rods 710 respectively. The movement of the two synchronous push frames 712 is driven by the two push columns 713 to rotate the two rotating push rods 710, thereby driving the T-shaped shut-off frames 709 to move. It should be noted that, in this embodiment of the invention, when the impact plate 704 is impacted, the active push frame 705 squeezes the push ring 719 to move, the push ring 719 drives the transfer bracket 707 to move, the transfer bracket 707 drives the transfer frame 718 to move, the transfer frame 718 drives the two synchronous push frames 712 to move, and the synchronous push frame 712 squeezes the rotating push rod 710 to rotate through the push column 713, causing the rotating push rod 710 to drive the T-shaped shut-off frames 709 to move, thereby causing the T-shaped shut-off frames 709 to seal the input ports of the additive and high-pressure gas, and allowing the additive and high-pressure gas to enter the two separate transfer boxes 708.

[0054] Please continue to refer to the instruction manual appendix. Figures 3-9 Furthermore, in this embodiment of the invention, two sliding push shafts 711 are rotatably mounted on the rotating push rod 710. One sliding push shaft 711 is movably mounted inside the T-shaped switch frame 709, and the other sliding push shaft 711 is mounted on the separation transfer box 708. It should be noted that, in this embodiment of the invention, when the rotating push rod 710 rotates, it rotates on one sliding push shaft 711, while simultaneously the rotating push rod 710 drives the T-shaped switch frame 709 to move via the other sliding push shaft 711.

[0055] More specifically, in this embodiment of the invention, a closed bottom plate 714 is installed on the bottom side of the T-shaped disconnect frame 709, which is used to close the bottom side of the separation transfer box 708. Additionally, spring grooves 715 are provided on both sides of the T-shaped disconnect frame 709, and spring-loaded levers 716 are movably installed in each of the two spring grooves 715. Spring-loaded springs 717 are installed on the inner walls of the spring-loaded levers 716 and the spring-loaded grooves 715. It should be noted that in this embodiment of the invention, the movement of the T-shaped disconnect frame 709 causes the closed bottom plate 714 to detach from the separation transfer box 708. At this time, the bottom side of the separation transfer box 708 is open, allowing the additive and high-pressure gas to be discharged. Simultaneously, under the rebound force of the two spring-loaded springs 717, the two spring-loaded levers 716 are ejected and locked onto the bottom side of the separation transfer box 708, thus maintaining the position of the T-shaped disconnect frame 709.

[0056] Please refer to the instruction manual attached. Figure 10 Furthermore, in this embodiment of the invention, a blockage separation device 8 is installed on the breakage separation device 7. The blockage separation device 8 is used to separate the additive delivery pipe 5 and the high-pressure air pipe 6 from the concrete nozzle 2. Specifically, the blockage separation device 8 includes two pipe clamps 801, and two limiting movement grooves 802 are provided on the central support 701. The two pipe clamps 801 are slidably installed in the two limiting movement grooves 802 respectively, and the two pipe clamps 801 are clamped on the concrete delivery pipe 4. It should be noted that in this embodiment of the invention, when the concrete delivery pipe 4 is blocked, the pipe clamps 801 move, thereby driving the T-shaped disconnector 709 to move, thereby achieving the purpose of sealing the input ports of the additive and high-pressure air.

[0057] More specifically, in this embodiment of the invention, a return spring 803 is installed on both sides of the pipe clamp 801, and one end of the two return springs 803 that is far from each other is respectively installed on the inner walls of the two sides of the limiting movement groove 802. In addition, a concave push plate 804 is installed on the synchronous push frame 712, and an L-shaped push frame 805 is installed on the pipe clamp 801. The movement of the pipe clamp 801 drives the L-shaped push frame 805 to push the concave push plate 804 to move, which is used to drive the synchronous push frame 712 to move. It should be noted that, in this embodiment of the invention, during the movement of the pipe clamp 801, the pipe clamp 801 presses the concave push plate 804 to move through the L-shaped push frame 805, so that the concave push plate 804 can synchronously drive the transition bracket 707 to move, thereby achieving the purpose of driving the T-shaped switch bracket 709 to move.

[0058] Please refer to the attached instruction manual. Figure 3 and Figure 11More specifically, in this embodiment of the invention, the rotating bracket 901 is provided with a pull groove 905, and a pull-back shaft 904 is installed on one side of the adapter bracket 707, the pull-back shaft 904 being movably installed in the pull groove 905; in addition, a support shaft 906 is rotatably installed on the rotating bracket 901, the support shaft 906 being installed on one side of the outer cover 702. It should be noted that, in this embodiment of the invention, when the adapter bracket 707 moves, the pull-back shaft 904 moves within the pull groove 905, thereby driving the rotating bracket 901 to rotate. The rotating bracket 901 rotates on the support shaft 906, and simultaneously the rotation of the rotating bracket 901 drives the baffle plate 902 to rotate in front of the nozzle 3, thereby achieving the purpose of automatically blocking the sprayed concrete.

[0059] More specifically, in this embodiment of the invention, a buffer groove 907 is provided on the rotating bracket 901, a buffer rod 903 is movably installed in the buffer groove 907, and a buffer spring 908 is installed between the buffer rod 903 and the inner wall of the buffer groove 907.

[0060] Furthermore, a limiting base plate 909 is installed on one side of the outer protective cover 702, and the rotation of the blocking plate 902 is restricted by the limiting base plate 909. It should be noted that, in this embodiment of the invention, when concrete impacts the blocking plate 902, the blocking plate 902 moves within two buffer grooves 907 via two buffer rods 903, and drives two buffer springs 908 to be stressed. Under the rebound force of the two buffer springs 908, the two buffer rods 903 pull the blocking plate 902 to reset, thus buffering the sprayed concrete and preventing the blocking plate 902 from being damaged by the impact.

[0061] In summary, the working principle of the concrete nozzle assembly provided in this embodiment of the invention is as follows:

[0062] During concrete spraying, if the nozzle 3 is damaged or leaks, the leaked gas or concrete will spray onto one or more impact plates 704. This causes the impact plates 704 to move the active pusher 705, which in turn causes the return spring 706 to contract. As the active pusher 705 moves, it compresses the push ring 719, which in turn moves the adapter bracket 707. The adapter bracket 707 then moves the intermediate transfer frame 718, which in turn moves two synchronous pushers 712. The synchronous pushers 712, through the push column 713, compress the rotating push rod 710, causing it to rotate. The nozzle 710 rotates on a sliding push shaft 711, while the rotating push rod 710 drives the T-shaped cut-off frame 709 to move via another sliding push shaft 711. This causes the T-shaped cut-off frame 709 to seal the input ports of the additive and high-pressure air, allowing the additive and high-pressure air to enter the two separation transfer boxes 708. At the same time, the movement of the T-shaped cut-off frame 709 causes the closed bottom plate 714 to detach from the separation transfer box 708. At this time, the bottom side of the separation transfer box 708 is open, allowing the additive and high-pressure air to be discharged. This prevents the problem of continuous spraying even when the nozzle 3 leaks and the concrete does not meet the spraying requirements.

[0063] Furthermore, during the spraying process of the concrete delivery pipe 4, the concrete delivery pipe 4 is clamped by two pipe clamps 801. If the concrete delivery pipe 4 becomes blocked near or away from the concrete nozzle 2, causing the concrete in the section of the concrete delivery pipe 4 clamped by the pipe clamps 801 to accumulate or decrease, the concrete delivery pipe 4 will bulge or be flattened by the pipe clamps 801. This will cause the two pipe clamps 801 to slide within the two limiting movement grooves 802. The movement of the pipe clamps 801 causes the L-shaped pusher 805 to press the concave pusher 804 to move, which in turn causes the concave pusher 804 to move synchronously with the transfer bracket 707, thereby causing the T-shaped cut-off bracket 709 to move. This also achieves the purpose of the T-shaped cut-off bracket 709 sealing the input ports of the additive and high-pressure gas.

[0064] Furthermore, when the adapter bracket 707 moves, it moves within the pull groove 905 via the pull-back shaft 904, thereby driving the rotating bracket 901 to rotate. The rotating bracket 901 rotates on the support shaft 906, and simultaneously, the rotation of the rotating bracket 901 drives the baffle plate 902 to rotate in front of the nozzle 3, blocking the sprayed concrete and preventing it from spraying onto the working surface. In addition, the impact of the concrete on the baffle plate 902 causes the baffle plate 902 to move within the two buffer grooves 907 via the two buffer rods 903, which in turn causes the two buffer springs 908 to be stressed. Therefore, under the rebound force of the two buffer springs 908, the two buffer rods 903 pull the baffle plate 902 to reset, thereby buffering the sprayed concrete and ensuring the blocking effect.

[0065] In addition, in some embodiments of the present invention, a concrete spraying device is also provided, which includes the concrete nozzle assembly provided in the embodiments of the present invention. Since the core principle and inventive technology contribution of the concrete spraying device mainly rely on the concrete nozzle assembly provided in the embodiments of the present invention, the applicant will not elaborate on the concrete spraying device further.

[0066] Furthermore, it should be emphasized that the above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A concrete nozzle assembly, characterized by, It includes a discharge bin and a concrete nozzle, the discharge bin is connected with a concrete conveying pipe, an additive conveying pipe and a high-pressure gas pipe, the concrete conveying pipe, the additive conveying pipe and the high-pressure gas pipe are connected on the concrete nozzle, a spray head is movably installed on the concrete nozzle; It also includes a damage separation device, the damage separation device is installed on the concrete nozzle, and the damage separation device is used for separating the additive conveying pipe and the high-pressure gas pipe from the concrete nozzle; the damage separation device includes a centralized support, the centralized support is installed on the concrete nozzle, one side of the centralized support is provided with an outer shroud, one side of the outer shroud is clamped with an end sealing plate, the spray head is located in the outer shroud, two separation transfer boxes are installed on the centralized support, the additive conveying pipe and the high-pressure gas pipe are connected on the two separation transfer boxes, and T-shaped on-off frames are movably installed in the two separation transfer boxes. It also includes a blocking and buffering device, the blocking and buffering device is installed on the damage separation device, and the blocking and buffering device is used for blocking and buffering the concrete sprayed by the spray head. The blocking and buffering device includes two rotating supports, the two rotating supports are rotatably installed on the two sides of the outer shroud, buffering pull rods are movably installed on the two rotating supports, a blocking plate is connected between the two buffering pull rods, and the two rotating supports rotate to drive the blocking plate to rotate through the two buffering pull rods, so as to block the concrete sprayed by the spray head. The damage separation device also includes four impact plates, the four impact plates are located in the outer shroud, and driven pushing frames are movably installed around the outer shroud; the four driven pushing frames are installed on the four impact plates respectively; the impact plates are provided with retraction springs, and the other ends of the retraction springs are installed on the inner walls of the outer shroud. Four adapter supports are movably installed on the centralized support, pushing rings are installed on the four adapter supports, and the driven pushing frames are used for moving the pushing rings; transfer frames are installed on the four adapter supports, two synchronous pushing frames are installed on the transfer frames, and pushing columns are installed on the two synchronous pushing frames; rotating push rods are rotatably installed on the two separation transfer boxes, T-shaped on-off frames are movably installed on the two rotating push rods respectively, and the two synchronous pushing frames move to drive the two rotating push rods to rotate through the two pushing columns, so as to drive the T-shaped on-off frames to move.

2. A concrete nozzle assembly according to claim 1, wherein, Two sliding push shafts are rotatably installed on the rotating push rod, one sliding push shaft is movably installed in the T-shaped on-off frame, and the other sliding push shaft is installed on the separation transfer box.

3. A concrete nozzle assembly according to claim 2, wherein, A closed bottom plate is installed on the bottom side of the T-shaped on-off frame, and the closed bottom plate is used for closing the bottom side of the separation transfer box. Two rebound grooves are formed on the two sides of the T-shaped on-off frame, rebound clamping rods are movably installed in the two rebound grooves, and rebound springs are installed on the inner walls of the rebound grooves and the rebound clamping rods.

4. A concrete nozzle assembly according to claim 3, wherein, The breakage separation device is provided with a blockage separation device, which is used for separating the additive delivery pipe and the high-pressure gas pipe from the concrete nozzle. The blockage separation device comprises two pipe clamping plates, two limiting movement grooves are formed in the central support, and the two pipe clamping plates are respectively slidably installed in the two limiting movement grooves and clamped on the concrete delivery pipe.

5. A concrete nozzle assembly according to claim 4, wherein, Reset springs are installed on both sides of the pipe clamping plate, and one end of the two reset springs away from each other is respectively installed on the inner wall of the limiting movement groove. The synchronous push frame is provided with an inner recessed push plate, the pipe clamping plate is provided with an L-shaped push frame, the pipe clamping plate drives the L-shaped push frame to move the inner recessed push plate, and the synchronous push frame is driven to move.

6. A concrete nozzle assembly according to claim 5, wherein, A pulling groove is formed in the rotating support, a pullback shaft is installed on one side of the rotating support, and the pullback shaft is movably installed in the pulling groove. A supporting shaft is rotatably installed on the rotating support, and the supporting shaft is installed on one side of the outer protective cover.

7. A concrete nozzle assembly according to claim 6, wherein, A buffer groove is formed in the rotating support, a buffer pull rod is movably installed in the buffer groove, and a buffer spring is installed between the buffer pull rod and the inner wall of the buffer groove. One side of the outer protective cover is provided with a limiting bottom plate, and the blocking plate is rotationally limited by the limiting bottom plate.

8. A concrete spraying apparatus, characterised in that, The concrete nozzle assembly comprises the concrete nozzle assembly of any one of claims 1 to 7.

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