Pneumatic modular wet concrete spraying equipment

Abstract

The present invention discloses a pneumatic modular concrete wet spraying device, comprising: a wet spraying machine body, the wet spraying machine body having a nozzle for spraying concrete; a base, a perforation is formed in the middle of the base along the axial direction of the base, the nozzle is detachably inserted into the perforation, and a plurality of support assemblies are formed on the outer edge of the base along the circumferential direction of the base; a plurality of high-pressure gas nozzles arranged in front of the slurry outlet of the nozzle facing the nozzle, the high-pressure gas nozzles are rotatably mounted on the support assemblies; a turning mechanism for adjusting the deflection angle of the high-pressure gas nozzles, mounted on the base, after the turning mechanism adjusts the deflection angle, the spraying ranges of the plurality of high-pressure gas nozzles overlap each other to form a high-pressure area, and the high-pressure area completely covers the spraying range of the nozzle. The present invention solves the problem of high rebound rate of the existing concrete wet spraying machine.

Description

Technical Field

[0001] The present invention relates to the technical field of construction, and particularly relates to a pneumatic modular wet concrete spraying device. Background Art

[0002] A wet shotcreting machine is a comprehensive shotcreting support tool. It is a construction equipment widely used in engineering construction. Using compressed air or other power, the mixed material in a certain proportion is transported through a pipeline and sprayed onto the sprayed surface at a high speed to coagulate and harden, thereby forming a concrete support layer.

[0003] At present, the working performance of the wet shotcreting machine used in tunnel construction in alpine regions has an important impact on the wet spraying efficiency and quality of the tunnel. In actual construction, since the wet shotcreting machine adopts two-cylinder alternating pumping to achieve the flow of concrete in the spraying pipeline. This spraying method will cause a pulse phenomenon to always exist during the concrete spraying process, resulting in a large spraying rebound rate, reduced spraying efficiency, and increased labor intensity of workers; secondly, the unreasonable nozzle structure will also lead to a reduction in spraying efficiency and quality. The above two points will both cause the rebound rate of the concrete sprayed by the wet shotcreting machine to not reach the ideal state.

[0004] The information disclosed in this background art section is only intended to enhance the overall understanding of the present invention and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Invention

[0005] In order to overcome the defects existing in the prior art, a pneumatic modular wet concrete spraying device is provided herein to solve the problem of high rebound rate of the existing concrete wet shotcreting machine.

[0006] To achieve the above object, a pneumatic modular wet concrete spraying device is provided, including:

[0007] A wet shotcreting machine body having a nozzle for spraying concrete;

[0008] A base, a perforation is provided in the middle of the base along the axial direction of the base, the nozzle is detachably passed through the perforation, and a plurality of support assemblies are formed on the outer edge of the base along the circumferential direction of the base;

[0009] A plurality of high-pressure gas nozzles are provided in front of the slurry outlet facing the nozzle, and the high-pressure gas nozzles are rotatably mounted on the support assemblies;

[0010] A flipping mechanism for adjusting the deflection angle of the high-pressure gas nozzle is installed on the base. After the flipping mechanism adjusts the deflection angle, the spraying ranges of multiple high-pressure gas nozzles overlap with each other to form a high-pressure area, and the high-pressure area completely covers the spraying range of the nozzle head.

[0011] Furthermore, the supporting assembly is arranged on the circumferential surface of the base.

[0012] Furthermore, the supporting assembly includes:

[0013] Two oppositely arranged ear plates, and the two ear plates are arranged along the circumferential direction of the base;

[0014] A movable sleeve detachably sleeved on the high-pressure gas nozzle. Relative two sides of the middle part of the movable sleeve are respectively connected with a rotating shaft. The ear plate is provided with a shaft hole, and the rotating shaft of the movable sleeve is rotatably inserted into the shaft hole.

[0015] Furthermore, the base has a front end close to the slurry outlet and a rear end far from the slurry outlet. A locking sleeve is connected to the rear end of the base. The locking sleeve is sleeved on the nozzle head, and the flipping mechanism is obliquely installed between the movable sleeve and the locking sleeve.

[0016] Furthermore, the flipping mechanism includes:

[0017] A core rod, and one end of the core rod is hinged to the locking sleeve;

[0018] A socket sleeve, and the other end of the core rod is movably inserted into one end of the socket sleeve, and the other end of the socket sleeve is hinged to the locking sleeve;

[0019] A driving member for driving the core rod is installed in the socket sleeve.

[0020] Furthermore, the driving member is an electric hydraulic push rod.

[0021] Furthermore, it further includes a controller. The electric hydraulic push rod is signal-connected to the controller. A distance measuring sensor for collecting the distance between the slurry outlet and the sprayed surface is installed on the base, and the distance measuring sensor is signal-connected to the controller.

[0022] Furthermore, the locking sleeve is formed with an internal thread, the nozzle head is formed with an external thread, and the locking sleeve is threadedly connected to the nozzle head.

[0023] Furthermore, multiple groups of the supporting assemblies are arranged at equal intervals along the circumferential direction of the base.

[0024] The beneficial effects of the present invention are as follows. The pneumatic modular concrete wet spraying equipment of the present invention uses multiple high-pressure gas nozzles integrated on the concrete spray head to form a pneumatic pressure circle on the concrete surface to be sprayed, and the high-pressure area in the core area of the pneumatic pressure circle completely covers the spraying range of the spray head, greatly reducing the rebound of concrete and saving materials. In addition, at different spraying distances from the spray head to the surface to be sprayed, by adjusting the deflection angle of the high-pressure gas nozzle, the high-pressure area of the pneumatic pressure circle can always completely cover the spraying range of the spray head. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 FIG. is a schematic structural diagram of the front of the pneumatic modular concrete wet spraying equipment according to an embodiment of the present invention.

[0027] Figure 2 FIG. is a schematic structural diagram of the back of the pneumatic modular concrete wet spraying equipment according to an embodiment of the present invention.

[0028] Figure 3 FIG. is a schematic structural diagram of the locking sleeve according to an embodiment of the present invention.

[0029] Figure 4 FIG. is a schematic structural diagram of the base according to an embodiment of the present invention.

[0030] Figure 5 FIG. is a schematic diagram of the coverage range of slurry spraying and high-pressure air flow spraying of the pneumatic modular concrete wet spraying equipment according to an embodiment of the present invention.

[0031] Figure 6 FIG. is a schematic diagram of the high-pressure area formed by the overlapping of multiple high-pressure air flows according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the related invention and not for limiting the invention. Additionally, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings.

[0033] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0034] Referring to Figures 1 to 6 as shown, the present invention provides a pneumatic modular concrete wet spraying equipment, including: a wet spraying machine body 1, a base 2, multiple high-pressure gas nozzles 3, and a flipping mechanism 4.

[0035] In this embodiment, the wet shotcreting machine body is a wet shotcrete spraying machine. The wet shotcrete spraying machine is an anchor shotcreting support tool. It uses compressed air or other power to transport a mixed material in a certain proportion through a pipeline and spray it at a high speed onto the sprayed surface to coagulate and harden, thereby forming a concrete support layer.

[0036] The wet shotcreting machine body 1 has a nozzle 11 for spraying concrete (slurry). The nozzle is connected to the feed pipe of the wet shotcreting machine body for pressurizing and pumping concrete (slurry). In this embodiment, the nozzle is tubular. The nozzle has a feed end close to the feed pipe and a discharge end far from the feed pipe. A slurry outlet is provided at the discharge port. The outer diameter of the nozzle gradually decreases from the feed end to the discharge end.

[0037] The base is cylindrical. A perforation is provided in the middle of the base 2 along the axial direction of the base 2. The perforation is arranged along the central axis of the base. The perforation is coaxially arranged with the base. The nozzle 11 is detachably inserted into the perforation. A plurality of support assemblies 21 are formed on the outer edge of the base 2 along the circumferential direction of the base 2.

[0038] In this embodiment, the support assemblies 21 are arranged on the circumferential surface of the base 2. The plurality of support assemblies 21 are arranged at equal intervals along the circumferential direction of the base 2. The number of support assemblies is adapted to the number of high-pressure gas nozzles. The positions of the plurality of high-pressure gas nozzles 3 correspond one by one to the positions of the plurality of support assemblies.

[0039] The plurality of high-pressure gas nozzles 3 are arranged in front of the slurry outlet of the nozzle 11. In this embodiment, based on the spraying direction of the concrete (slurry), the high-pressure gas nozzles are arranged behind the slurry outlet. The high-pressure gas nozzles 3 are rotatably mounted on the support assemblies 21.

[0040] The turning mechanism 4 is mounted on the base 2. The turning mechanism 4 is used to adjust the deflection (or turning) angle of the high-pressure gas nozzles 3.

[0041] During use, refer to Figure 5 and Figure 6 , based on the distance between the sprayed surface C and the slurry outlet of the nozzle 11, the turning mechanism 4 adjusts the deflection angle of the high-pressure gas nozzles so that the plurality of high-pressure gas nozzles are arranged towards the sprayed surface in front of the slurry outlet. Specifically, the spraying ranges of the plurality of high-pressure gas nozzles 3 overlap with each other to form a high-pressure area, that is, the core area of the spraying ranges of the plurality of high-pressure gas nozzles. The high-pressure area completely covers the spraying range of the nozzle 11. After the concrete sprayed by the nozzle covers the sprayed surface, the air pressure in the high-pressure area presses the concrete firmly on the sprayed surface. Even if some concrete rebounds to the sub-high-pressure area B outside the high-pressure area (that is, the area outside the spraying range formed when the nozzle is perpendicular to the sprayed surface), it can also be coated on the sprayed surface immediately under the pressing action of the air pressure in the sub-high-pressure area B, greatly reducing the rebound rate of wet shotcreting of concrete.

[0042] The pneumatic modular concrete wet spraying equipment of the present invention reduces the length of the concrete pumping pipe of the wet spraying machine, reduces the pulse phenomenon, and makes the operation difficulty of concrete pumping decrease.

[0043] The pneumatic modular concrete wet spraying equipment of the present invention uses hot melt adhesive with higher viscosity and density to improve the overall sealing performance of the wet spraying machine, further reduce the pulse effect, and improve the applicability of the pneumatic modular concrete wet spraying equipment of the present invention in harsh environments such as high cold and high altitude areas.

[0044] The pneumatic modular concrete wet spraying equipment of the present invention uses a plurality of high-pressure gas nozzles integrated on the concrete spray head to form a pneumatic pressure circle on the concrete receiving surface, and the high-pressure area in the core area of the pneumatic pressure circle completely covers the spraying range of the spray head, greatly reducing the rebound of concrete and saving materials. In addition, at different spraying distances from the spray head to the receiving surface, by adjusting the deflection angle of the high-pressure gas nozzle, the high-pressure area of the pneumatic pressure circle can always completely cover the spraying range of the spray head.

[0045] The pneumatic modular concrete wet spraying equipment of the present invention integrates the base, a plurality of high-pressure gas nozzles and a flipping mechanism into one to form a modular component. During use, the modular component is installed on the spray head, which is convenient to use and improves the efficiency of concrete spraying construction.

[0046] Refer to Figure 2 and Figure 4 , specifically, the support assembly 21 includes: two ear plates 211 and a movable sleeve 212. The two ear plates 211 are arranged oppositely. The two ear plates 211 are arranged along the circumferential direction of the base 2. The movable sleeve 212 is detachably sleeved on the high-pressure gas nozzle 3. Relative two sides of the middle part of the movable sleeve 212 are respectively connected with a rotating shaft 213. The ear plate 211 is provided with a shaft hole. The rotating shaft 213 of the movable sleeve 212 is rotatably inserted into the shaft hole. In the attached drawing Figures 1 to 3 , in order to clearly show the structure of the movable sleeve, the high-pressure gas nozzle is not shown.

[0047] The base 2 has a front end close to the slurry outlet and a rear end far from the slurry outlet. A locking sleeve 22 is connected to the rear end of the base 2. The locking sleeve 22 is sleeved on the spray head 11. The flipping mechanism 4 is obliquely installed between the movable sleeve 212 and the locking sleeve 22.

[0048] Refer to Figure 2 , the flipping mechanism 4 includes a core rod and a socket sleeve. One end of the core rod is hinged to the locking sleeve 22. The other end of the core rod is movably inserted into one end of the socket sleeve. The other end of the socket sleeve is hinged to the locking sleeve 22. The driving member is installed in the socket sleeve. The driving member is used to drive the core rod.

[0049] The locking sleeve 22 is formed with internal threads. The nozzle 11 is formed with external threads. The locking sleeve 22 is threadedly connected to the nozzle 11.

[0050] As a preferred embodiment, the driving member is an electro-hydraulic push rod.

[0051] In some embodiments, the driving member is a hydraulic cylinder.

[0052] The pneumatic modular concrete wet spraying equipment of the present invention further includes a controller. The electro-hydraulic push rod is signal-connected to the controller. A distance measuring sensor for collecting the distance between the slurry outlet and the sprayed surface is installed on the base 2. The distance measuring sensor is signal-connected to the controller.

[0053] The pneumatic modular concrete wet spraying equipment of the present invention determines the overall position of the wet spraying machine according to the site. When the wet spraying machine moves to an appropriate position, the concrete pumping device is started first, and then the high-pressure gas nozzle is started. The spraying angle of the high-pressure gas nozzle is adjusted through the flipping mechanism so that the high-pressure area in the core area of the formed air pressure circle completely covers the spraying range of the nozzle, and the sub-high-pressure area of the air pressure circle covers the diffusion range of the spraying range of the nozzle. After the concrete is pumped once, the high-pressure gas nozzle is closed first, and the angle of the high-pressure gas nozzle is maintained to carry out the concrete pumping in the next stage.

[0054] The above description is only the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. A pneumatic modular wet concrete spraying device, characterized in that, Comprising: A wet shotcreting machine body having a nozzle for spraying concrete; A base, a perforation is provided in the middle of the base along the axial direction of the base, the nozzle is detachably inserted through the perforation, and a plurality of sets of supporting components are formed along the circumferential direction of the base at the outer edge of the base; A plurality of high-pressure gas nozzles arranged in front of the slurry outlet of the nozzle, the high-pressure gas nozzles are rotatably mounted on the supporting components; A turning mechanism for adjusting the deflection angle of the high-pressure gas nozzles, mounted on the base. After the turning mechanism adjusts the deflection angle, the spraying ranges of the plurality of high-pressure gas nozzles overlap with each other to form a high-pressure area, and the high-pressure area completely covers the spraying range of the nozzle; The supporting component includes: Two oppositely arranged ear plates, the two ear plates are arranged along the circumferential direction of the base; A movable sleeve detachably sleeved on the high-pressure gas nozzle, the relative two sides in the middle of the movable sleeve are respectively connected with a rotating shaft, the ear plate is provided with a shaft hole, and the rotating shaft of the movable sleeve is rotatably inserted into the shaft hole; The base has a front end close to the slurry outlet and a rear end far from the slurry outlet, a locking sleeve is connected to the rear end of the base, the locking sleeve is sleeved on the nozzle, and the turning mechanism is obliquely mounted between the movable sleeve and the locking sleeve; The turning mechanism includes: A core rod, one end of the core rod is hinged to the locking sleeve; A socket sleeve, the other end of the core rod is movably inserted into one end of the socket sleeve, and the other end of the socket sleeve is hinged to the locking sleeve; A driving member for driving the core rod, mounted in the socket sleeve; It further includes a controller, the driving member is signal-connected to the controller, a distance measuring sensor for collecting the distance between the slurry outlet and the sprayed surface is mounted on the base, and the distance measuring sensor is signal-connected to the controller.

2. The pneumatic modular concrete wet spraying equipment according to claim 1, characterized in that, The supporting component is arranged on the circumferential surface of the base.

3. The pneumatic modular wet concrete spraying equipment according to claim 1, characterized in that, The driving member is an electric hydraulic push rod.

4. The pneumatic modular concrete wet spraying equipment according to claim 1, characterized in that, The locking sleeve is formed with an internal thread, the nozzle is formed with an external thread, and the locking sleeve is threadedly connected to the nozzle.

5. The pneumatic modular wet concrete spraying equipment according to claim 1, characterized in that The plurality of sets of supporting components are arranged at equal intervals along the circumferential direction of the base.

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