Concrete guniting structure and concrete guniting device

Abstract

The utility model provides a concrete guniting structure and a concrete guniting device.The concrete guniting structure comprises a main input pipe, a main diffusion pipe, a water inlet pipe and a guniting pipe, a diffusion cavity is formed in the main diffusion pipe, and the diffusion cavity comprises an inlet section, a diffusion section and an outlet section which are sequentially communicated; an inlet of the main input pipe is communicated with external concrete conveying equipment, and an outlet is communicated with the inlet section; an inlet of the water inlet pipe is communicated with external liquid conveying equipment, and an outlet is communicated with the diffusion cavity; the guniting pipe is communicated with the outlet section; wherein the inlet section, the diffusion section and the outlet section are sectioned in the direction perpendicular to the central axis of the main diffusion pipe to form an inlet section, a diffusion section and an outlet section, and the area of the inlet section and the area of the outlet section are both smaller than the area of the diffusion section. According to the concrete guniting head structure, the problem that an existing concrete guniting head structure is poor in concrete mixing effect is solved, the rebound rate is effectively reduced, and the utilization rate of guniting materials can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of mine shotcreting equipment, and in particular, to a concrete shotcreting structure and a concrete shotcreting device. Background Art

[0002] At present, in the tunneling of mine roadways, shotcreting concrete operation is a commonly used construction operation method for roadway support and maintenance; the shotcreting machine used in the prior art is usually a rotor type shotcreting machine, and its working principle is that the dry-mixed concrete is sprayed into the rotor chamber where the rotor rotates continuously through the feed inlet of the shotcreting machine, and the high-pressure air also enters the rotor chamber through the air passage. When the rotor rotates to the position of the discharge port, under the action of the high-pressure gas, the shotcreting material (shotcreting material) moves at high speed through the conveying pipe into the shotcreting head structure (for example: the nozzle seat assembly), where it is mixed with the water droplets refined through the water passing small holes to form concrete slurry, and is sprayed onto the wall surface of the construction roadway to form a shotcreting layer.

[0003] However, for the existing shotcreting head structure, the water output of the internal water passing small holes is uneven, and because the diameter of the shotcreting pipe at the position of the water passing small holes is small, the mixing effect of concrete and water is poor, which not only makes the concrete particles easy to spread, resulting in a large amount of dust at the construction site, deteriorating the construction operation conditions and seriously affecting safety production, but also leads to an increase in the rebound material (i.e., the concrete that cannot be effectively utilized) of the concrete and a higher rebound rate. The measured rebound rate at the construction site is usually between 20% and 30%, resulting in serious waste of concrete; moreover, because the internal water passing small holes of the shotcreting head structure are easily blocked by the concrete slurry, the shotcreting effect and shotcreting efficiency are reduced, and because the on-site maintenance and disassembly are inconvenient, the overall working efficiency is seriously reduced; in addition, when the existing shotcreting head structure is used on-site, water leakage is likely to occur, resulting in the operators being wet by water, which not only deteriorates the construction operation conditions, but also indirectly affects the construction safety and shotcreting quality. Summary of the Utility Model

[0004] The utility model provides a concrete shotcreting structure and a concrete shotcreting device to solve the problems that the existing concrete shotcreting head structure has a poor mixing effect on concrete and the internal water passing small holes are easily blocked.

[0005] To solve the above problems, according to one aspect of the present utility model, a concrete shotcreting structure is provided, which includes a total input pipe, a total diffusion pipe, a water inlet pipe, and a shotcreting pipe. The interior of the total diffusion pipe has a diffusion cavity, and the diffusion cavity includes an inlet section, a diffusion section, and an outlet section that are connected in sequence. The inlet of the total input pipe is connected to an external concrete conveying device, and the outlet is connected to the inlet section to convey the shotcreting material for shotcreting into the total diffusion pipe. The inlet of the water inlet pipe is connected to an external liquid conveying device, and the outlet is connected to the diffusion cavity to convey the liquid for shotcreting into the total diffusion pipe. The shotcreting pipe is connected to the outlet section and is used to convey the mixed shotcreting material to a designated position. Among them, the central axis of the water inlet pipe and the central axis of the diffusion cavity form an angle. The connection between the diffusion section and the inlet section is provided with a diameter change, and the connection between the diffusion section and the outlet section is provided with a diameter change. Taking a cross-section perpendicular to the central axis of the total diffusion pipe for the inlet section, the diffusion section, and the outlet section, an inlet cross-section, a diffusion cross-section, and an outlet cross-section are formed. The areas of both the inlet cross-section and the outlet cross-section are smaller than the area of the diffusion cross-section.

[0006] Further, the concrete shotcreting structure further includes a stop component, and at least a part of the stop component is arranged in the diffusion section. The stop component blocks the shotcreting material entering from the inlet section to reduce the movement speed of the shotcreting material.

[0007] Further, the stop component includes a blocking bolt. The total diffusion pipe has a through threaded hole that communicates with the diffusion section. One end of the blocking bolt passes through the through threaded hole and enters the diffusion section, and the blocking bolt is in threaded cooperation with the inner wall of the through threaded hole. The central axis of the blocking bolt and the central axis of the total diffusion pipe form an angle.

[0008] Further, the stop component further includes a sealing gasket, and the sealing gasket is respectively in contact with one end of the blocking bolt outside the diffusion section and the outer periphery of the total diffusion pipe to seal the through threaded hole.

[0009] Further, there are multiple blocking bolts and multiple through threaded holes. The multiple through threaded holes correspond to the multiple blocking bolts one by one. The central axes of the multiple blocking bolts intersect at a point, and this point is the intersection point. Among them, the intersection point is located on the central axis of the total diffusion pipe.

[0010] Further, the central axes of the multiple blocking bolts are coplanar and are equally angularly spaced along the circumferential direction of the intersection point.

[0011] Further, the concrete shotcreting structure further includes a stop valve and a spray head. The spray head is connected to the outlet of the water inlet pipe and is located in the diffusion cavity. The spray head is used to atomize the liquid for shotcreting. The stop valve is arranged on the water inlet pipe and is used to control the flow rate of the liquid in the water inlet pipe.

[0012] Furthermore, the concrete spraying structure further includes a filter, which is detachably arranged at the inlet of the water inlet pipe or inside the water inlet pipe and is used for filtering the liquid for spraying.

[0013] Furthermore, the main diffusion pipe is in sealed communication with the main input pipe; the concrete spraying structure further includes a connecting seat and a plurality of connecting bolts. The inside of the connecting seat has a communicating cavity, and both ends of the communicating cavity are in sealed communication with the spraying pipe and the outlet section respectively; the spraying pipe is detachably arranged on the connecting seat; the outer periphery of the connecting seat has a first flange, and the outside of the main diffusion pipe has a second flange. The first flange and the second flange are detachably and fixedly connected by a plurality of connecting bolts to fix the connecting seat on the main diffusion pipe.

[0014] According to another aspect of the present invention, there is provided a concrete spraying device, including the above-mentioned concrete spraying structure; the concrete spraying device further includes a concrete conveying device and a liquid conveying device. The concrete conveying device is communicated with the inlet of the main input pipe and is used for conveying the spraying material for spraying; the liquid conveying device is communicated with the inlet of the water inlet pipe and is used for conveying the liquid for spraying.

[0015] Applying the technical solution of the present invention, the present invention provides a concrete spraying structure, including a main input pipe, a main diffusion pipe, a water inlet pipe and a spraying pipe. The inside of the main diffusion pipe has a diffusion cavity, and the diffusion cavity includes an inlet section, a diffusion section and an outlet section that are sequentially communicated; the inlet of the main input pipe is communicated with an external concrete conveying device, and the outlet is communicated with the inlet section to convey the spraying material for spraying into the main diffusion pipe; the inlet of the water inlet pipe is communicated with an external liquid conveying device, and the outlet is communicated with the diffusion cavity to convey the liquid for spraying into the main diffusion pipe; the spraying pipe is communicated with the outlet section and is used for conveying the mixed spraying material to a designated position; wherein, the central axis of the water inlet pipe and the central axis of the diffusion cavity form an included angle; the connection between the diffusion section and the inlet section is provided with a diameter change, and the connection between the diffusion section and the outlet section is provided with a diameter change; taking a cross-section perpendicular to the central axis of the main diffusion pipe for the inlet section, the diffusion section and the outlet section to form an inlet cross-section, a diffusion cross-section and an outlet cross-section, and the areas of both the inlet cross-section and the outlet cross-section are smaller than the area of the diffusion cross-section.

[0016] The utility model works by cooperating the main diffusion pipe with the water inlet pipe, which is significantly different from the existing concrete spraying head structure. The flow rate and pressure of the spraying material will change due to the change of the flow area in the main diffusion pipe, and then it will be efficiently mixed with the liquid for spraying transported by the water inlet pipe in the diffusion section, solving the problem of poor mixing effect of the existing concrete spraying head structure on concrete and effectively reducing the rebound rate; by setting an angle between the central axis of the water inlet pipe and the central axis of the diffusion cavity, the liquid droplets can fully collide and mix with the concrete particles, and then a good mixing effect can be obtained without using the small water holes in the existing concrete spraying head structure to refine the water flow, simplifying the structure and avoiding the occurrence of blockage problems; by setting variable diameters at the joints of the diffusion section and the inlet section and at the joints of the diffusion section and the outlet section, it not only ensures the smooth flow of the spraying material but also reduces the flow noise; by setting the area of the inlet section smaller than the area of the diffusion section, the inlet section and the diffusion section cooperate to form a flaring effect, effectively reducing the flow rate of the concrete particles and thus ensuring the mixing effect; by setting the area of the outlet section smaller than the area of the diffusion section, the outlet section and the diffusion section cooperate to form a constriction effect, effectively increasing the flow rate of the spraying material and thus improving the spraying effect; the structure of the utility model is simple and reliable in operation, which can improve the utilization rate of the spraying material, avoid waste of the spraying material, and moreover, the utility model has good spraying effect and high spraying efficiency, without the need for high-frequency on-site maintenance and disassembly, and is suitable for large-scale popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specification drawings forming a part of this application are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model. In the drawings:

[0018] Figure 1 It shows a partial structural schematic diagram of the concrete spraying structure provided by the embodiment of the utility model.

[0019] Among them, the above-mentioned drawings include the following reference numerals:

[0020] 10, main input pipe;

[0021] 20, main diffusion pipe; 21, diffusion cavity; 211, inlet section; 212, diffusion section; 213, outlet section; 22, second flange;

[0022] 30, water inlet pipe;

[0023] 40, spraying pipe;

[0024] 50, stop assembly; 51, blocking bolt; 52, sealing washer;

[0025] 60, stop valve;

[0026] 70. Spray head;

[0027] 80. Connecting seat; 81. Communication cavity; 82. First flange;

[0028] 90. Connecting bolt. Detailed implementation manner

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments in 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.

[0030] As Figure 1 shown, the embodiment of the present invention provides a concrete spraying structure, including a total input pipe 10, a total diffusion pipe 20, a water inlet pipe 30, and a spraying pipe 40. The inside of the total diffusion pipe 20 has a diffusion cavity 21, and the diffusion cavity 21 includes an inlet section 211, a diffusion section 212, and an outlet section 213 that are connected in sequence; the inlet of the total input pipe 10 is connected to an external concrete conveying device, and the outlet is connected to the inlet section 211 to convey the spraying material for spraying into the total diffusion pipe 20; the inlet of the water inlet pipe 30 is connected to an external liquid conveying device, and the outlet is connected to the diffusion cavity 21 to convey the liquid for spraying into the total diffusion pipe 20; the spraying pipe 40 is connected to the outlet section 213 and is used to convey the mixed spraying material to a specified position; wherein, the central axis of the water inlet pipe 30 and the central axis of the diffusion cavity 21 form an angle; the connection between the diffusion section 212 and the inlet section 211 is provided with a diameter change, and the connection between the diffusion section 212 and the outlet section 213 is provided with a diameter change; taking a cross-section of the inlet section 211, the diffusion section 212, and the outlet section 213 in a direction perpendicular to the central axis of the total diffusion pipe 20 to form an inlet cross-section, a diffusion cross-section, and an outlet cross-section, and the areas of the inlet cross-section and the outlet cross-section are both smaller than the area of the diffusion cross-section.

[0031] The utility model works by the cooperation of the main diffusion pipe 20 and the water inlet pipe 30, which is significantly different from the existing concrete spraying nozzle structure. The flow rate and pressure of the spraying material will change within the main diffusion pipe 20 due to the change of the flow area, and then it will be efficiently mixed with the liquid for spraying transported by the water inlet pipe 30 in the diffusion section 212, solving the problem of poor mixing effect of the existing concrete spraying nozzle structure on concrete, and effectively reducing the rebound rate; by setting the central axis of the water inlet pipe 30 to have an included angle with the central axis of the diffusion cavity 21, the liquid droplets can fully collide and mix with the concrete particles, so that a good mixing effect can be obtained without using the water passing small hole structure in the existing concrete spraying nozzle structure to refine the water flow, simplifying the structure and avoiding the occurrence of blockage problems; by setting the connection between the diffusion section 212 and the inlet section 211 to have a reduced diameter, and the connection between the diffusion section 212 and the outlet section 213 to have a reduced diameter, it not only ensures the smooth flow of the spraying material, but also reduces the flow noise; by setting the area of the inlet cross-section to be smaller than the area of the diffusion cross-section, the inlet section 211 and the diffusion section 212 cooperate to form a flaring effect, effectively reducing the flow rate of the concrete particles, and then ensuring the mixing effect; by setting the area of the outlet cross-section to be smaller than the area of the diffusion cross-section, the outlet section 213 and the diffusion section 212 cooperate to form a constriction effect, effectively increasing the flow rate of the spraying material, and then improving the spraying effect; the structure of the utility model is simple and reliable in operation, can improve the utilization rate of the spraying material, avoid the waste of the spraying material, and moreover, the utility model has a good spraying effect and high spraying efficiency, and does not need high-frequency on-site maintenance and disassembly, and is suitable for large-scale popularization and use.

[0032] As Figure 1 shown, the concrete spraying structure further includes a stop component 50, and at least a part of the stop component 50 is arranged in the diffusion section 212; the stop component 50 blocks the spraying material entering from the inlet section 211 to reduce the movement speed of the spraying material.

[0033] By setting the stop component 50, the movement speed of the spraying material in the diffusion section 212 is effectively reduced, and then the mixing effect of the spraying material (such as: concrete material) and the liquid is ensured; at the same time, the reduction of the flow rate will also cause the large-particle impurities in the spraying material to settle in the diffusion section 212, and then the spraying effect is ensured.

[0034] As Figure 1 shown, the stop component 50 includes a blocking bolt 51; the main diffusion pipe 20 is provided with a through-threaded hole, and the through-threaded hole is communicated with the diffusion section 212; one end of the blocking bolt 51 passes through the through-threaded hole and enters the diffusion section 212, and the blocking bolt 51 is in threaded cooperation with the inner wall of the through-threaded hole; the central axis of the blocking bolt 51 has an included angle with the central axis of the main diffusion pipe 20.

[0035] By setting the stop component 50 to include a stop bolt 51, it not only ensures the working reliability of the stop component 50, but also simplifies the structure of the stop component 50, thereby facilitating installation and subsequent maintenance and replacement; by setting the central axis of the stop bolt 51 to have an angle with the central axis of the total diffuser pipe 20, the blocking effect is ensured.

[0036] As Figure 1 shown, the stop component 50 further includes a sealing washer 52, and the sealing washer 52 is respectively in contact with one end of the stop bolt 51 outside the diffusing section 212 and the outer periphery of the total diffuser pipe 20 to seal the through threaded hole.

[0037] By setting the sealing washer 52, strict sealing of the through threaded hole is achieved, thereby avoiding leakage of spraying materials and liquids, and ensuring the operation safety and comfort of the staff.

[0038] As Figure 1 shown, there are multiple stop bolts 51 and multiple through threaded holes, and the multiple through threaded holes correspond to the multiple stop bolts 51 one by one; the central axes of the multiple stop bolts 51 intersect at a point, and this point is the intersection point; among them, the intersection point is located on the central axis of the total diffuser pipe 20.

[0039] By setting the central axes of the multiple stop bolts 51 to intersect at the intersection point and the intersection point is located on the central axis of the total diffuser pipe 20, it not only ensures the reasonable distribution of the overall center of gravity of the concrete spraying structure, but also makes the force on the total diffuser pipe 20 from the multiple stop bolts 51 tend to be balanced, thereby avoiding the problems of deformation and jitter of the total diffuser pipe 20 due to uneven and unbalanced forces during long-term spraying.

[0040] Optionally, the central axes of the multiple stop bolts 51 are coplanar and are equally angularly spaced along the circumferential direction of the intersection point. Such a setting not only further ensures the dynamic balance of the force on the total diffuser pipe 20 from the multiple stop bolts 51, but also makes the multiple stop bolts 51 convenient for efficient disassembly, installation and maintenance.

[0041] As Figure 1 shown, the concrete spraying structure further includes a stop valve 60 and a spray head 70. The spray head 70 is communicated with the outlet of the water inlet pipe 30 and is located in the diffusion cavity 21. The spray head 70 is used for atomizing the liquid for spraying; the stop valve 60 is arranged on the water inlet pipe 30 to control the flow rate of the liquid in the water inlet pipe 30.

[0042] By setting the stop valve 60, reliable control of the liquid flow rate in the water inlet pipe 30 is achieved, thereby providing structural support for subsequent intelligent spraying and setting the spraying mixture material with an accurate solid-liquid ratio; by setting the spray head 70, the liquid for spraying can be further atomized, further improving the mixing effect of the spraying material (for example: concrete material) and the liquid.

[0043] It should be noted that: by installing at least one spray head 70 on the upper part of the main diffusion pipe 20, water is sprayed at multiple points through the spray head 70 inside the main diffusion pipe 20, and at least one pressure water curtain can be formed. The sprayed water flow impacts on the inner wall of the main diffusion pipe 20 to form fine droplets splashing everywhere, and then is fully mixed with the dry-mixed mortar (i.e., spraying material) inside the main diffusion pipe 20 to form sprayed concrete material and spray it out through the spraying pipe 40, further solving the problem that the existing spraying equipment cannot be deeply and evenly mixed with water when spraying concrete after dry mixing, and thus avoiding problems such as large dust and high rebound rate at the spraying construction site.

[0044] Specifically, the concrete spraying structure further includes a filter, which is detachably arranged at the inlet of the water inlet pipe 30 or inside the water inlet pipe 30 for filtering the liquid used for spraying.

[0045] By arranging the filter, the problems of blockage of the water inlet pipe 30 and the spray head 70 are avoided, thereby ensuring the working reliability of the water inlet pipe 30 and the spray head 70 and improving the durability.

[0046] As Figure 1 shown, the main diffusion pipe 20 is hermetically connected to the main input pipe 10; the concrete spraying structure further includes a connecting seat 80 and a plurality of connecting bolts 90. The inside of the connecting seat 80 has a communication cavity 81, and both ends of the communication cavity 81 are hermetically connected to the spraying pipe 40 and the outlet section 213 respectively; the spraying pipe 40 is detachably arranged on the connecting seat 80; the outer periphery of the connecting seat 80 has a first flange 82, and the outside of the main diffusion pipe 20 has a second flange 22. The first flange 82 and the second flange 22 are detachably and fixedly connected by a plurality of connecting bolts 90 to fix the connecting seat 80 on the main diffusion pipe 20.

[0047] By arranging the connecting seat 80, the spraying pipe 40 can be quickly disassembled, and thus it is convenient to carry out spraying work stably for a long time; by arranging the detachable and fixed connection of the first flange 82 and the second flange 22 by a plurality of connecting bolts 90, it not only realizes the reliable fixation of the connecting seat 80 on the main diffusion pipe 20, but also ensures the sealing performance.

[0048] It should be noted that: for the concrete spraying structure proposed by the present utility model, during actual long-term use, no obvious water leakage phenomenon is found, which can improve the working conditions of operators. And because the water and cement are fully mixed, the problem of leaking dust during operation is also significantly reduced, optimizing the working environment of operators and also playing a positive role in the safe production in the mine.

[0049] The present utility model also provides a concrete shotcreting device, which includes the above-mentioned concrete shotcreting structure; the concrete shotcreting device further includes a concrete conveying device and a liquid conveying device. The concrete conveying device is communicated with the inlet of the main input pipe 10 and is used for conveying the shotcreting material for shotcreting; the liquid conveying device is communicated with the inlet of the water inlet pipe 30 and is used for conveying the liquid for shotcreting.

[0050] The concrete shotcreting device provided by the present utility model solves the problem that the existing shotcreting equipment cannot be deeply and evenly mixed with water when dry-mixing concrete and then shotcreting concrete, thereby avoiding problems such as large dust and high rebound rate at the shotcreting construction site.

[0051] Now, the specific working process and design principle of an embodiment of the present utility model will be described in detail as follows:

[0052] The connecting seat 80 and the shotcreting pipe 40 are connected and integrated by welding; the main diffusion pipe 20 and the water inlet pipe 30 are welded and fixed, and a quick connector seat (for example: the existing mine-used KJ-10 type quick connector seat) is welded and fixed at the connection between the water inlet pipe 30 and the main diffusion pipe 20. The end of the quick connector seat pointing to the inside of the diffusion chamber 21 is provided with an internal thread and can be thread-fitted with the spray head 70 (for example: a conical spray head); three blocking bolts 51 with central axes mutually forming an angle of 120° are installed inside the diffusion chamber 21. Its function is to block the solid particles in the dry-mixed shotcreting concrete jet to achieve the effects of speed reduction, tumbling, and stirring, so that the water and ash are fully mixed, and the adhesiveness of the shotcreting fluid is increased; at the end of the water inlet pipe 30 far from the quick connector seat, a stop valve 60 (for example: a mine-used KJ-10 type stop valve) is connected, and the other end of the stop valve 60 is connected to a water filter to prevent the small holes on the spray head 70 from being blocked.

[0053] In summary, the present utility model provides a concrete spraying structure and a concrete spraying device. By cooperating the main diffusion pipe 20 with the water inlet pipe 30, the present utility model is significantly different from the existing concrete spraying head structure. The flow rate and pressure of the spraying material will change due to the change of the flow area in the main diffusion pipe 20, and then it will be efficiently mixed with the liquid for spraying transported by the water inlet pipe 30 in the diffusion section 212, solving the problem of poor mixing effect of the existing concrete spraying head structure on concrete and effectively reducing the rebound rate; by setting an included angle between the central axis of the water inlet pipe 30 and the central axis of the diffusion cavity 21, the liquid droplets can fully collide and mix with the concrete particles, and then a good mixing effect can be obtained without using the water passing small hole structure in the existing concrete spraying head structure to refine the water flow, simplifying the structure and avoiding the occurrence of blockage problems; by setting a diameter change at the connection between the diffusion section 212 and the inlet section 211, and a diameter change at the connection between the diffusion section 212 and the outlet section 213, it not only ensures the smooth flow of the spraying material but also reduces the flow noise; by setting the area of the inlet section smaller than the area of the diffusion section, the inlet section 211 and the diffusion section 212 cooperate to form a flaring effect, effectively reducing the flow rate of the concrete particles and thus ensuring the mixing effect; by setting the area of the outlet section smaller than the area of the diffusion section, the outlet section 213 and the diffusion section 212 cooperate to form a constriction effect, effectively increasing the flow rate of the spraying material and thus improving the spraying effect; the structure of the present utility model is simple and reliable in operation, can improve the utilization rate of the spraying material, avoid the waste of the spraying material, and moreover, the present utility model has good spraying effect and high spraying efficiency, does not require high-frequency on-site maintenance and disassembly, and is suitable for large-scale popularization and use.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for ease of description, the dimensions of the various parts shown in the drawings are not drawn in accordance with actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the description. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof in subsequent drawings is not required.

[0056] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation terms "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0057] For ease of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. can be used here to describe the spatial positional relationships of one device or feature to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0058] In addition, it should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without otherwise stating, the above terms have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0059] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A concrete spraying structure, characterized in that: The invention comprises a main input pipe (10), a main diffuser pipe (20), a water inlet pipe (30) and a shotcrete pipe (40); the main diffuser pipe (20) has a diffuser chamber (21) inside, and the diffuser chamber (21) comprises an inlet section (211), a diffuser section (212) and an outlet section (213) which are connected in sequence; the inlet of the main input pipe (10) is connected to an external concrete conveying device, and the outlet is connected to the inlet section (211) so as to convey the shotcrete material for shotcrete into the main diffuser pipe (20); the inlet of the water inlet pipe (30) is connected to an external liquid conveying device, and the outlet is connected to the diffuser chamber (21) so as to convey the liquid for shotcrete into the main diffuser pipe (20); the shotcrete pipe ( The diffuser (212) is connected to the outlet section (213) and is used to transport the mixed spraying material to a designated location; wherein the central axis of the water inlet pipe (30) and the central axis of the diffusion chamber (21) form an angle; the connection between the diffuser section (212) and the inlet section (211) is provided with a diameter change, and the connection between the diffuser section (212) and the outlet section (213) is provided with a diameter change; the inlet section (211), the diffuser section (212) and the outlet section (213) are cross-sectioned in a direction perpendicular to the central axis of the total diffuser (20) to form an inlet cross section, a diffusion cross section and an outlet cross section, and the area of ​​the inlet cross section and the area of ​​the outlet cross section are both smaller than the area of ​​the diffusion cross section.

2. The concrete spraying structure according to claim 1, characterized in that: The concrete shotcrete structure further comprises a stopper assembly (50), at least a portion of which is arranged in the diffusion section (212); the stopper assembly (50) blocks the shotcrete material entering from the inlet section (211) to reduce the movement speed of the shotcrete material.

3. The concrete spraying structure according to claim 2, characterized in that: The stop assembly (50) comprises a blocking bolt (51); the main diffuser (20) is provided with a through threaded hole, the through threaded hole being in communication with the diffuser section (212); one end of the blocking bolt (51) passes through the through threaded hole and enters into the diffuser section (212), and the blocking bolt (51) is threadably engaged with an inner wall of the through threaded hole; a central axis of the blocking bolt (51) and a central axis of the main diffuser (20) form an angle.

4. The concrete spraying structure according to claim 3, characterized in that: The stopper assembly (50) further comprises a sealing gasket (52), wherein the sealing gasket (52) respectively abuts against one end of the blocking bolt (51) located outside the diffuser section (212) and the outer periphery of the main diffuser pipe (20) to seal the through threaded hole.

5. The concrete spraying structure according to claim 3, characterized in that: There are a plurality of blocking bolts (51), and there are a plurality of through threaded holes, and the plurality of through threaded holes correspond one to one with the plurality of blocking bolts (51); the central axes of the plurality of blocking bolts (51) intersect at one point, which is the intersection point; wherein the intersection point is located on the central axis of the main diffuser (20).

6. The concrete spraying structure according to claim 5, characterized in that: The central axes of the plurality of blocking bolts (51) are coplanar and are arranged at equal angular intervals along the circumferential direction of the intersection point.

7. The concrete spraying structure according to claim 1, characterized in that: The concrete spraying structure further comprises a stop valve (60) and a spray head (70); the spray head (70) is communicated with the outlet of the water inlet pipe (30) and is located in the diffusion chamber (21); the spray head (70) is used for atomizing liquid for spraying; the stop valve (60) is arranged on the water inlet pipe (30) and is used for controlling the flow rate of the liquid in the water inlet pipe (30).

8. The concrete spraying structure according to claim 1, characterized in that: The concrete spraying structure further comprises a filter, which is detachably arranged at the inlet of the water inlet pipe (30) or inside the water inlet pipe (30) and is used to filter the liquid used for spraying.

9. The concrete spraying structure according to claim 1, characterized in that: The main diffuser pipe (20) is sealed and connected to the main input pipe (10); the concrete spraying structure further comprises a connection seat (80) and a plurality of connection bolts (90); the connection seat (80) has a communication cavity (81) inside, and the two ends of the communication cavity (81) are respectively sealed and connected to the spraying pipe (40) and the outlet section (213); the spraying pipe (40) is detachably arranged on the connection seat (80); the outer periphery of the connection seat (80) has a first flange (82), and the outside of the main diffuser pipe (20) has a second flange (22); the first flange (82) and the second flange (22) are detachably fixedly connected by the plurality of connection bolts (90) to fix the connection seat (80) on the main diffuser pipe (20).

10. A concrete spraying device, characterized in that: The concrete spraying structure comprises the concrete spraying structure according to any one of claims 1 to 9; the concrete spraying device also comprises a concrete conveying device and a liquid conveying device, the concrete conveying device is connected to the inlet of the main input pipe (10) and is used to convey the spraying material for spraying; the liquid conveying device is connected to the inlet of the water inlet pipe (30) and is used to convey the liquid for spraying.

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