UHPC ultra high performance concrete gunning trolley

Abstract

The application discloses a UHPC (ultra high performance concrete) spraying and lining trolley, which comprises a trolley frame serving as a support, a spraying adjusting device for adjusting the spraying angle and / or spraying position of concrete, a ring rail positioning device connected to the trolley frame and serving as a walking rail of the spraying adjusting device and for adjusting the position of the trolley frame relative to the trolley frame so as to center the design center of a construction site, a rotary spraying and scattering device connected to the spraying adjusting device and used for rotary spraying and scattering concrete, a formwork device connected to the spraying adjusting device and used for adjusting the spraying thickness of concrete, a detection system arranged on the spraying adjusting device and used for detecting the compactness of sprayed concrete, and a walking system connected to the trolley frame and used for providing power for the walking of the trolley frame. The spraying and lining trolley can realize the spraying and lining of UHPC, greatly reduce the investment of construction personnel, reduce the labor intensity and safety risk of workers, reduce the comprehensive cost of building construction and improve the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-high performance concrete spraying, in particular to a UHPC ultra-high performance concrete spraying trolley. Background Art

[0002] Shotcrete support, a key process in tunnel and lane support, is widely used in railways, highways, water conservancy, national defense, metallurgy, and other fields. Its working principle is to utilize fluid dynamics to transport ready-mixed concrete through pipelines and spray it at high speed onto the sprayed surface. The continuous impact and compaction of the concrete during the spraying process forms a concrete layer. UHPC, the most innovative cement-based engineering material in the past 30 years, has been gradually applied to bridges, buildings, tunnels, and special projects. Its principle is to optimize the combination of active and inert fillers through the principle of close packing to form a dense and uniform material matrix. Under extremely low water-cement ratios, the porosity caused by cement hydration is very low, forming a nearly impermeable matrix with extremely high durability, ultra-high mechanical properties, superior fluidity, and high viscosity.

[0003] Existing template spraying and template spraying technologies all utilize conventional concrete spraying equipment, spraying manipulators, and assembled or block-assembled templates similar to lining trolleys. These technologies fail to fundamentally address the difficulties of ultra-high performance concrete (UHPCC) in spraying and breaking up, control of sprayed concrete strength and density, poor concrete rebound and forming, high requirements for spray mix profile accuracy, and difficulty detecting sprayed concrete density. For example, publication number CN109356619B discloses a novel concrete spraying equipment comprising a carrier mechanism, an arm mechanism, a template mechanism, and a nozzle assembly. The carrier mechanism is provided with an arm mechanism, the arm mechanism including a swivel arm, and a template mechanism and nozzle assembly are provided at the front end of the swivel arm. The template mechanism can form a mold cavity with the excavated rock face, and the nozzle assembly can adjust the injection angle / direction relative to the mold cavity. By using the aforementioned spraying trolley, zero rebound can be achieved. Within the same operating range, the amount of concrete used can be reduced by 20%-40%, while the amount of accelerator used can also be reduced, resulting in significant economic and social benefits. The concrete surface is highly smooth, requiring no post-shaping, shortening the construction period and significantly improving production efficiency. Mechanical construction can be operated remotely throughout the entire process, significantly improving construction safety, effectively reducing the amount of dust inhaled by operators, and reducing the probability of occupational diseases such as silicosis. The actual principle of zero rebound described in the above technical solution is to forcibly rebound the rebound material of the sprayed concrete to the concrete spraying surface through the formwork mechanism. Experiments with similar spraying methods on the market have shown that, firstly, this technology not only fails to truly solve the concrete rebound problem and reduce concrete consumption, but its sprayed rebound material will adhere to the concrete spraying surface in the form of floating dust particles, causing a significant decrease in the overall density of the sprayed concrete. The formed concrete will experience stratification and slag shedding, resulting in the strength and surface finish of the sprayed concrete failing to meet standard requirements, making it of no practical significance for promotion. Secondly, the filling of the formwork space is achieved by adjusting the nozzle angle. Once the spraying angle changes, the sprayed concrete will be sprayed onto the concrete spraying surface. If the concrete is sprayed in a vacuum, the path of the shotcrete will change, resulting in spray voids, which will seriously affect the quality and intensity of concrete spraying. This patented technology is only applicable to conventional concrete spraying and cannot break up ultra-high performance concrete and accelerators, adjust the flow direction and thickness of concrete. It will also cause ultra-high performance concrete and accelerators to come into direct contact in the mixer cavity, resulting in rapid solidification of ultra-high performance concrete and backflow of accelerators, which will block the high-pressure air holes and the pipes before and after the nozzle mixer, causing problems such as spray pipe blockage, poor spraying effect, low concrete spraying intensity and more rebound. It is not suitable for UHPC ultra-high performance, high-viscosity concrete spraying based on the theory of tight stacking.For another example, publication number CN116084991A discloses a tunnel support concrete spraying device, comprising: a frame, a panel, the panel being arranged on the frame, the panel being in contact with the arch on the inner wall of the tunnel, so that a cavity is formed on the inner wall of the tunnel, the cavity comprising: an upper port and a lower port in opposite positions; an adjusting assembly, the adjusting assembly being arranged on the frame, the adjusting assembly having multiple degrees of freedom; a nozzle, the nozzle being arranged on the adjusting assembly, a mixture of compressed air and concrete being introduced into the slurry inlet end of the nozzle, and a slurry outlet end of the nozzle facing the upper port of the cavity. In the above-mentioned tunnel support concrete spraying device, not only is the material waste of concrete effectively reduced, and the cost of tunnel support is reduced, but also the generation of dust can be suppressed, and the construction environment in the tunnel can be improved. At the same time, the molding surface of the concrete after solidification is made flatter and smoother, thereby improving the quality of the concrete molding surface, and further improving the quality of the tunnel support. The actual principle of reducing the waste of concrete materials described in this plan is to force the rebound material of the shotcrete to rebound and vibrate it to the concrete spraying surface through the formwork and vibration mechanism. Experiments on the same type of mold spraying on the market have demonstrated that the sprayed rebound material will adhere to the concrete sprayed surface in the form of floating dust particles. Although vibration can solve the problem of decreased density caused by floating dust adhesion, vibration will make the formwork and shotcrete adhere more tightly, making it difficult to demold the formwork and easy to stick to the sprayed surface, seriously affecting the sprayed forming surface of the concrete. Summary of the Invention

[0004] The present invention provides a UHPC ultra-high performance concrete spraying trolley to solve the technical problems that existing spraying trolleys are only suitable for conventional concrete and are not suitable for spraying ultra-high performance concrete with high quality requirements, as well as have high labor intensity, low efficiency and poor safety.

[0005] According to one aspect of the present invention, a UHPC ultra-high performance concrete spraying trolley is provided, comprising:

[0006] Frame, used as support;

[0007] A spraying adjustment device for adjusting the spraying angle and / or spraying position of the concrete;

[0008] A ring rail positioning device, connected to the vehicle frame, is used as a running track for the injection adjustment device and is used to adjust its position relative to the vehicle frame to align it with the design center of the construction site;

[0009] A rotary spraying and breaking up device, connected to the spraying regulating device, is used for rotary spraying and breaking up concrete;

[0010] The template device is connected to the spraying adjustment device and is used to adjust the thickness of the concrete spraying;

[0011] A detection system, provided in the spraying regulating device, is used to detect the density of the sprayed concrete;

[0012] The traveling system is connected to the frame and is used to provide power for the frame to travel.

[0013] As a further improvement of the above technical solution, the rotary jet dispersing device includes a rotary jet mixer, which includes a valve body and a valve core arranged in the valve body, the valve core is a rotating body, the valve core has a tail edge, an outer cone surface and a concrete flow channel connecting the two ends of the valve core, a swirl channel is provided on the outer cone surface at a preset angle, and a plurality of swirl channels are evenly distributed along the circumference of the outer cone surface; the valve core is provided with high-pressure mixing gas holes that respectively connect the swirl channel and the concrete flow channel; the inner cavity of the valve body has a mounting end for sealing with the tail edge and an inner cone surface for matching with the outer cone surface, and at least two groups of mixing nozzles are provided on the valve body at the axial position corresponding to the high-pressure mixing gas hole, which are used to respectively connect an external high-pressure air duct and a quick-setting agent pipeline; the length of the valve body is greater than the length of the valve core so that the inner cavity of the valve body forms a mixing cavity at the outlet end of the valve core.

[0014] As a further improvement of the above technical solution, a flow control structure is provided on the inner wall of the concrete flow channel on the side of the high-pressure mixed gas hole close to the valve core inlet end, for preventing concrete from flowing back into the high-pressure mixed gas hole.

[0015] As a further improvement of the above technical solution, the rotary jet breaking device also includes a delivery pipe and a venturi nozzle, the venturi nozzle is arranged at the outlet end of the rotary jet mixer, and the delivery pipe is arranged at the inlet end of the rotary jet mixer. The inner diameter of the delivery pipe gradually decreases from the inlet end to the outlet end to a preset value, and the delivery pipe is used to allow the concrete to gradually change in volume and flow rate to be input into the rotary jet mixer.

[0016] As a further improvement of the above technical solution, the formwork device includes a rolling mechanism and a flexible formwork wrapped on the rolling mechanism, the flexible formwork is used to limit the spraying range of concrete, the rolling mechanism is fixed with a scraper and a roller connected to the release agent pipeline, the rolling mechanism is used to tension the flexible formwork, and is also used to drive the flexible formwork to roll along the rolling mechanism so that the roller evenly releases the release agent and uniformly applies the release agent to the surface of the flexible formwork, and is also used to drive the flexible formwork so that the scraper scrapes off the concrete rebound material sticking on the flexible formwork.

[0017] As a further improvement of the above technical solution, the template device also includes a spray ruler device, which is respectively connected to the template device and the spray adjustment device. The spray ruler device includes a ruler and a spray ruler telescopic mechanism. The spray ruler telescopic mechanism is respectively connected to the spray adjustment device and the template device. The ruler is used to indicate the telescopic amount of the spray ruler telescopic mechanism.

[0018] As a further improvement of the above technical solution, the ring rail positioning device includes a ring rail frame and a bidirectional telescopic mechanism. The ring rail frame is connected to the vehicle frame via the bidirectional telescopic mechanism. The bidirectional telescopic mechanism includes a vertical telescopic mechanism and a horizontal telescopic mechanism.

[0019] As a further improvement of the above technical solution, the spray adjustment device includes a nozzle rotation mechanism, an arm rotation mechanism and an arm travel mechanism, and the arm travel mechanism is connected to the ring rail frame.

[0020] As a further improvement of the above technical solution, the spraying trolley further includes:

[0021] The variable pumping system is installed on the frame and is used to pump concrete and adjust the concrete pumping volume;

[0022] The fluid metering system is installed on the vehicle frame and is used to control the amount of additives added.

[0023] As a further improvement of the above technical solution, the detection system includes a protective cover installed on the injection adjustment device and a microwave broadband radar arranged in the protective cover.

[0024] The present invention has the following beneficial effects:

[0025] The traveling system drives the frame to travel in the construction scene to reach or exit the target construction position. The circular rail positioning device adjusts the position relative to the frame to center the design center of the construction site at the target construction position, thereby controlling the accuracy of the concrete spraying profile, improving the construction quality, and meeting the construction design requirements. At the same time, it serves as the traveling track of the spraying adjustment device, and the spraying adjustment device adjusts the concrete spraying angle and spraying position to ensure the spraying range and quality. The rotary spraying scattering device standardizes the concrete harness outlet characteristics, performs rotary spraying scattering on ultra-high performance concrete, reduces concrete rebound, improves concrete spraying strength and quality, and reduces concrete The risk of concrete adhering to the pipeline and clogging the nozzle is eliminated. The template device adjusts and limits the spraying thickness of the concrete, ensuring the spraying construction process and the overall construction quality of the concrete, avoiding manual scraping, disassembly and assembly of molds and other operations, greatly reducing manual labor intensity, improving construction efficiency, reducing construction costs, and reducing concrete rebound; the detection system detects the density of the sprayed concrete to ensure the controllable quality of the spraying process, improve the construction quality and acceptance rate; this spraying trolley realizes the spraying and lining of ultra-high performance concrete, and greatly reduces the input of construction personnel, reduces the labor intensity and safety risks of workers, reduces the comprehensive cost of construction, and improves construction efficiency.

[0026] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 is a side view of a preferred embodiment of the present invention;

[0029] Figure 2 is a top view of a preferred embodiment of the present invention;

[0030] Figure 3 1 is a schematic structural diagram of a ring rail positioning device according to a preferred embodiment of the present invention;

[0031] Figure 4 It is a partial structural diagram of the ring rail positioning device according to a preferred embodiment of the present invention;

[0032] Figure 5 is a side view of a template device according to a preferred embodiment of the present invention;

[0033] Figure 6 It is a structural schematic diagram of a template device according to a preferred embodiment of the present invention;

[0034] Figure 7 is a structural schematic diagram of a rolling structure according to a preferred embodiment of the present invention;

[0035] Figure 8 1 is a schematic structural diagram of a rotary jet mixing flow device according to a preferred embodiment of the present invention;

[0036] Figure 9 1 is a structural diagram of a rotary jet mixer according to a preferred embodiment of the present invention;

[0037] Figure 10 Schematic diagram of the structure of the valve core of the preferred embodiment of the present invention;

[0038] Figure 11 is a cross-sectional view of a valve core according to a preferred embodiment of the present invention;

[0039] Figure 12 is a cross-sectional view of a valve body according to a preferred embodiment of the present invention;

[0040] Figure 13 Schematic diagram of the structure of the valve body of the preferred embodiment of the present invention;

[0041] Figure 14 This is a schematic diagram of the structure of the injection adjustment device of the preferred embodiment of the present invention. Figure 1;

[0042] Figure 15 This is a schematic diagram of the structure of the injection adjustment device of the preferred embodiment of the present invention. Figure 2 ;

[0043] Figure 16 This is a reference diagram of the use state of the injection adjustment device of the preferred embodiment of the present invention;

[0044] Figure 17 1 is a schematic structural diagram of a detection system according to a preferred embodiment of the present invention;

[0045] Figure 18 1 is a schematic structural diagram of a spray ruler system according to a preferred embodiment of the present invention;

[0046] Figure 19 It is a structural diagram of a variable displacement pumping system according to a preferred embodiment of the present invention.

[0047] Legend:

[0048] 101, ring rail positioning device 102, template device 103, rotary spraying device 104, spraying adjustment device 105, detection system 106, frame 107, hydraulic system 108, fluid metering system 109, spray gauge system 110, pumping variable system 111, control system 112, walking system 201, ring rail frame 202, two-way telescopic mechanism 203, 3D laser scanner 301, vertical telescopic mechanism 302, horizontal telescopic mechanism 401, rolling mechanism 402, roller 403, scraper 404, flexible template 501, screw 502, upper roller 503, lower roller 504, tensioning roller 601, conveying pipe 602, rotary Spray mixer 603, Venturi nozzle 701, valve core 702, valve body 801, sealing groove 802, trailing edge 803, swirl channel 804, mixing air hole 805, flow control structure 806, concrete flow channel 807, outer cone 808, inner cone 809, mixing groove 810, inner cavity 811, mixing nozzle 812, mixing cavity 901, nozzle rotation mechanism 902, boom rotation mechanism 903, boom travel mechanism 1001, microwave broadband radar 1002, protective cover 1101, ruler 1102, spray ruler telescopic mechanism 1201, liner hopper 1202, guide chute 1203, pumping mechanism 1204, displacement detection module. DETAILED DESCRIPTION

[0049] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0050] like Figures 1 to 19As shown, the UHPC ultra-high performance concrete spraying trolley of this embodiment includes:

[0051] a frame 106 for supporting;

[0052] A spray adjustment device 104 for adjusting the spray angle and / or spray position of concrete;

[0053] The ring rail positioning device 101 is connected to the frame 106 and is used to serve as a running track for the injection adjustment device 104 and is used to adjust its position relative to the frame 106 to center the design center of the construction site;

[0054] The rotary spraying and breaking up device 103 is connected to the spraying regulating device 104 and is used for rotary spraying and breaking up the concrete;

[0055] The template device 102 is connected to the spraying adjustment device 104 and is used to adjust the thickness of the concrete spraying;

[0056] The detection system 105 is provided on the spraying adjustment device 104 and is used to detect the density of the sprayed concrete;

[0057] The traveling system 112 is connected to the vehicle frame 106 and is used to provide power for the vehicle frame 106 to travel.

[0058] It should be understood that the trolley has a control system 111 for receiving signals from various components on the trolley and making corresponding control instructions based on the signals to achieve intelligent control. Its structure and principles are based on existing technologies and will not be elaborated on in detail.

[0059] The working principle of this spraying trolley is as follows: the traveling system 112 drives the frame 106 to travel in the construction scene to reach or exit the target construction position, and the circular rail positioning device 101 adjusts the position relative to the frame 106 to center the design center of the construction site at the target construction position, thereby controlling the accuracy of the concrete spraying profile, improving the construction quality, and meeting the construction design requirements. At the same time, it serves as the traveling track of the spraying adjustment device 104, and the spraying adjustment device 104 adjusts the concrete spraying angle and spraying position to ensure the spraying range and quality. The rotary spraying scattering device 103 standardizes the concrete harness outlet characteristics, performs rotary spraying scattering on ultra-high performance concrete, reduces concrete rebound, and improves concrete quality. The intensity and quality of concrete spraying are improved, and the risk of concrete adhering to pipes and clogging nozzles is reduced. The template device 102 adjusts and limits the spraying thickness of concrete to ensure the spraying construction process and the overall construction quality of concrete, avoids manual scraping, disassembly and assembly of molds and other operations, greatly reduces manual labor intensity, improves construction efficiency, reduces construction costs, and reduces concrete rebound; the detection system 105 detects the density of sprayed concrete to ensure that the quality of the spraying process is controllable, improves construction quality and acceptance rate; this spraying trolley realizes the spraying and lining of ultra-high performance concrete, and greatly reduces the input of construction personnel, reduces the labor intensity and safety risks of workers, reduces the comprehensive cost of construction, and improves construction efficiency.

[0060] In this embodiment, the rotary jet mixer 103 includes a rotary jet mixer 602, a delivery pipe 601 and a venturi nozzle 603. The venturi nozzle 603 is arranged at the outlet end of the rotary jet mixer 602, and the delivery pipe 601 is arranged at the inlet end of the rotary jet mixer 602. The inner diameter of the delivery pipe 601 gradually decreases to a preset value from the inlet end to the outlet end. The delivery pipe 601 is used to input the concrete with a gradually changing volume and flow rate into the rotary jet mixer 602, so that the concrete flow rate is gradually accelerated while preventing blockage. The rotary jet mixer 602 introduces an external accelerating agent and high-pressure gas to mix and disperse the ultra-high performance concrete. The rotary jet mixer 602 fully disperses the ultra-high performance concrete based on its internal design and outputs the ultra-high performance concrete to the venturi nozzle 603 for output, effectively improving the construction quality of the concrete wet spraying machine, reducing the concrete rebound rate, increasing the service life of the nozzle, preventing the nozzle from clogging and bursting, and ensuring the safety of equipment and personnel.

[0061] Specifically, the swirl mixer 602 includes a valve body 702 and a valve core 701 arranged in the valve body 702. The valve core 701 is a rotating body. The valve core 701 has a trailing edge 802, an outer conical surface 807 and a concrete flow channel 806 connecting the two ends of the valve core 701. The concrete flow channel 806 is an internal hollow channel of the valve core 701, providing a concrete conveying space and a space for preliminary mixing with high-pressure gas and quick-setting agent; a swirl channel 803 is provided on the outer conical surface 807 at a preset angle, which is designed to be 10° in this embodiment. A plurality of swirl channels 803 are evenly arranged along the circumference of the outer conical surface 807 to guide the introduced quick-setting agent and high-pressure gas. The swirl channel 803 guides the high-pressure airflow and quick-setting agent to flow in a specific direction. The valve core 701 is provided with a high-pressure mixing gas hole 804 which is connected to the swirl channel 803 and the concrete flow channel 806 respectively, and cooperates with the swirl channel 803 to guide and cooperate with the swirl channel 803 to realize the atomization and swirl of the high-pressure gas and the swirl agent. The valve core 701 of the swirl mixer 602 effectively controls the fluid movement posture, reaction time and reaction area, thereby improving the dispersion and mixing effect of ultra-high performance concrete.

[0062] The inner cavity 810 of the valve body 702 has a mounting end for sealing with the trailing edge 802 and an inner conical surface 808 for matching with the outer conical surface 807. Based on the conical design of the inner cavity 810 of the valve body 702, the flow of concrete, high-pressure airflow and quick-setting agent is guided and accelerated, so that the pressure is gradually increased before entering the mixing area, thereby improving the kinetic energy and mixing effect of the fluid; in the specific setting, the inner wall of the inner cavity 810 of the valve body 702 should be kept highly smooth to reduce friction resistance and energy loss during fluid flow, ensuring that the fluid The outer wall surface of the tail edge 802 of the valve core 701 is provided with a sealing groove 801 for embedding a sealing ring and sealingly cooperating with the valve body 702. The tail edge 802 is embedded in the installation end and abuts against the time axial limit to prevent fluid leakage, bear pressure and seal the fluid, and bear the high-pressure thrust of the valve core 701. At least two sets of mixing nozzles 811 are provided on the axial position of the high-pressure mixed gas hole 804 on the valve body 702, which are used to connect the external high-pressure air duct and the quick-setting agent pipeline respectively, and are connected to the inner conical surface 804. 08 A mixing groove 809 is provided at the position of the mixing nozzle 811 so that the high-pressure gas and the accelerating setting agent are evenly filled in the valve core 701; the length of the valve body 702 is greater than the length of the valve core 701 so that the inner cavity 810 of the valve body 702 forms a mixing cavity 812 at the outlet end of the valve core 701, providing space for mixing and breaking up the concrete, the accelerating setting agent and the high-pressure gas; the high-pressure airflow and the accelerating setting agent enter the valve core 701 through the mixing nozzle 811 and the mixing groove 809 on the rotary spray mixing valve body 702, and the high-pressure airflow and the accelerating setting agent enter the valve core 701. The accelerator flows along the swirl channel 803, which forms an angle with the axis of the valve core 701. Therefore, during the fluid flow, a rotational thrust is applied to the valve core 701. Under the guidance of the swirl channel 803, the thrust of the high-pressure airflow causes the swirl-jet mixed flow valve core 701 to rotate. The rotating valve core 701 forms a vortex effect in the swirl channel 803, increasing the contact area and time of the mixture. The high-pressure mixing air hole 804 introduces the high-pressure airflow and accelerator into the concrete channel, where they are mixed and dispersed in the valve core 701.

[0063] Furthermore, a flow control structure 805 is provided on the inner wall of the concrete flow channel 806 on the side of the high-pressure mixing air hole 804 close to the inlet end of the valve core 701. The flow control structure 805 is a flow control protective edge, which is used to prevent concrete from flowing back into the high-pressure mixing air hole 804, prevent concrete from flowing back into the high-pressure mixing air hole 804 under a high-pressure environment, and prevent concrete from accumulating and clogging in the air hole, thereby ensuring that the high-pressure airflow and accelerator can smoothly enter the mixing area, maintaining the stability and efficiency of the mixing process; the flow control protective edge is an annular structure formed by the protrusion of the concrete flow channel 806 surrounding the valve core 701, and the inner diameter of the flow control protective edge gradually decreases from the side away from the mixing air hole 804 to the side close to the mixing air hole 804. Through its gradually decreasing inner diameter design, a gradually tightening channel is formed, which effectively guides the flow direction of the concrete, and at the same time prevents the concrete from flowing back into the high-pressure mixing air hole 804 under high pressure, thereby avoiding clogging of the air hole and accumulation of concrete.

[0064] In this embodiment, the template device 102 includes a rolling mechanism 401 and a flexible template 404 wrapped around the rolling mechanism 401. The flexible template 404 is used to limit the spraying range of concrete. A scraper 403 and a roller 402 connected to a release agent pipeline are fixedly provided on the rolling mechanism 401. The rolling mechanism 401 is used to tension the flexible template 404, and is also used to drive the flexible template 404 to roll along the rolling mechanism 401 so that the roller 402 evenly releases the release agent while uniformly coating the release agent on the surface of the flexible template 404. It is also used to drive the flexible template 404 so that the scraper 403 scrapes off the concrete rebound material sticking to the flexible template 404; wherein, the flexibility of the template makes it less likely to stick to the concrete. The scraper 403 is fixed to the rolling mechanism 401 by bolts to scrape off the concrete rebound material adhered to the flexible formwork 404, reduce the weight of the formwork, increase the service life of the formwork, and reduce labor intensity; the roller 402 is an internal hollow structure, and the outer wall of the roller 402 is evenly provided with quick-setting agent holes. The release agent is sprayed through the release agent pipeline externally connected to the shaft end of the roller 402, and the release agent is evenly applied to the flexible formwork 404 by coordinating the rotation of the rolling mechanism 401 and the flexible formwork 404, thereby facilitating the demoulding and forming of the sprayed concrete and the falling off and scraping of the concrete rebound material, thereby improving the quality and effect of concrete forming.

[0065] In this embodiment, the template device 102 also includes a spray ruler device, which is respectively connected to the template device 102 and the injection adjustment device 104. The spray ruler device includes a ruler 1101 and a spray ruler telescopic mechanism 1102. The spray ruler telescopic mechanism 1102 is respectively connected to the injection adjustment device 104 and the template device 102. The ruler 1101 is used to mark the telescopic amount of the spray ruler telescopic mechanism 1102; the spray ruler telescopic mechanism 1102 is an inner and outer sleeve combination structure, and its driving device is a hydraulic cylinder; the ruler 1101 is laser engraved on the middle surface between the inner and outer sleeves of the telescopic mechanism to mark the telescopic amount and positioning relationship of the spray ruler system 109, so as to realize the quantitative telescopic of the template device 102 for different tunnel sizes, strictly regulate the spraying thickness of concrete, and reduce manual measurement errors and labor intensity.

[0066] Among them, the rolling mechanism 401 has a screw, an upper roller 502, a lower roller 503 and a tensioning roller 504. The upper roller 502 is fixed to the spray ruler system 109 through bearings, bearing seats and bolts. The shaft end of the upper roller 502 is connected to the hydraulic motor reducer to realize the active rolling of the upper roller 502; the lower roller 503 is fixed to the spray ruler system 109 through bearings, bearing seats and bolts, and the passive drive of the lower roller 503 is realized by the rotation of the upper roller 502 and the flexible template 404; the tensioning roller 504 is fixed to the spray ruler system 109 through bearings, bearing seats, screws 501 and bolts, and the passive drive of the tensioning roller 504 is realized by the rotation of the upper roller 502 and the flexible template 404, and the tensioning of the flexible template 404 is realized by the telescopic adjustment of the screw 501.

[0067] In this embodiment, the ring rail positioning device 101 includes a ring rail frame 201, a bidirectional telescopic mechanism 202, and a three-dimensional laser scanner 203. The ring rail frame 201 is connected to the vehicle frame 106 via the bidirectional telescopic mechanism 202. The bidirectional telescopic mechanism 202 includes a vertical telescopic mechanism 301 and a horizontal telescopic mechanism 302. The three-dimensional laser scanner 203 is fixed to the top of the vehicle frame 106 by bolts and is used for tunnel contour scanning and ring rail positioning. The bidirectional telescopic mechanism 202 is fixed to the vehicle frame 106 by bolts and is controlled by the control system 111 to perform corresponding operations. The ring rail frame 201 is fixed to the bidirectional telescopic mechanism 202. The bidirectional telescopic mechanism 202 is adjusted by telescopic adjustment to achieve alignment between the ring rail frame and the central axis of the tunnel. The bidirectional telescopic mechanism 202 automatically positions the relative position of the ring rail frame 201 and the tunnel axis, thereby improving the positioning accuracy of the equipment in the tunnel and thereby improving the running track accuracy of the working device on the ring rail frame 201, achieving smooth concrete spraying, improving construction quality, and reducing manual labor and safety hazards caused by spraying bulges.

[0068] In this embodiment, the spray adjustment device 104 includes a nozzle rotation mechanism 901, an arm rotation mechanism 902 and an arm travel mechanism 903. The arm travel mechanism 903 is connected to the ring rail frame 201 through a gear and a rack. The gear is fixed to the arm travel mechanism 903 by bolts. The outer end of the gear is connected to the hydraulic reducer. The rack is fixed to the ring rail frame 201 by bolts. The hydraulic reducer drives the gear to drive the spray adjustment device 104 to rotate along the rack on the ring rail frame 201. The internal design of the arm travel mechanism 903 is a lead screw 5 01. A hydraulic motor reducer is connected to the outer end of the arm travel mechanism 903, and then the arm rotation mechanism 902 is driven to travel via a screw; the arm rotation mechanism 902 is fixed on the arm travel mechanism 903, and is controlled to rotate radially by a rotary reducer to achieve adjustment of the forward and reverse directions of concrete spraying; the nozzle rotation mechanism 901 is fixed on the arm rotation mechanism 902, and is controlled by a hydraulic motor to achieve adjustment of the axial and radial angles, adjust the spraying posture of the nozzle rotation mechanism 901, and achieve mechanized and intelligent control of the spraying process.

[0069] In this embodiment, the spraying trolley further includes:

[0070] Hydraulic system 107, providing hydraulic power for the equipment;

[0071] The variable pumping system 110 is provided on the vehicle frame 106 and is used to pump concrete and adjust the concrete pumping volume, so as to adjust the pumping volume according to the ultra-high performance characteristics of the concrete, and has the advantages of high pumping pressure and high mixing torque;

[0072] The fluid metering system 108 is mounted on the vehicle frame 106 and is used to control the amount of additives added. Based on this, the amount of additives added is strictly controlled according to the ultra-high performance characteristics of concrete to ensure ultra-high performance of the shotcrete. The system includes a flow meter, an accelerator pump, and an air compressor. The flow meter can accurately control the amount of additives required for shotcrete, meeting the high requirements of ultra-high performance concrete for mix ratios. The accelerator pump is used to add accelerators to the shotcrete. The air compressor is used to provide a fixed amount of high-pressure air to the shotcrete.

[0073] The pumping variable system 110 includes a liner hopper 1201, a guide chute 1202, a pumping mechanism 1203, and a displacement detection module 1204. The pumping mechanism 1203 is fixed to the frame 106 by bolts and adopts a piston pumping mechanism 1203 for pumping concrete fluid. The displacement detection module 1204 is fixed to the pumping mechanism 1203 and detects and counts the number of swings of the pumping mechanism 1203 and feeds back the signal to the control system 111 for calculation and coordination with the control system 111 for control. The concrete pumping displacement is manually adjusted according to the characteristics of different concretes, so that the concrete can be fully broken up when other configuration conditions remain unchanged; the lined hopper 1201 is fixed on the pumping mechanism 1203, and its lining is a polyurethane plate riveted on the inner wall of the hopper, which is used to hold concrete and prevent concrete from sticking; the guide chute 1202 is fixed on the frame 106, located below the pumping mechanism 1203, to guide the flow of waste residue from the pumping mechanism 1203, facilitate the collection of waste residue, and prevent environmental pollution.

[0074] In this embodiment, the detection system 105 includes a protective cover 1002 installed on the injection adjustment device 104 and a microwave broadband radar 1001 arranged in the protective cover 1002, which is implemented using the microwave broadband radar 1001 of the existing technology; the protective cover 1002 is used to block concrete rebound material and protect the microwave broadband radar 1001; the concrete density detection system 105 is used to detect the quality of concrete injection in real time, reduce the risk of project rework, and improve the project acceptance rate.

[0075] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A UHPC ultra-high performance concrete spraying trolley, characterized in that: include: a frame (106) for supporting the vehicle; A spraying adjustment device (104) for adjusting the spraying angle and / or spraying position of concrete; A ring rail positioning device (101) is connected to the vehicle frame (106) and is used as a running track for the injection adjustment device (104) and is used to adjust the position relative to the vehicle frame (106) so as to center the design center of the construction site; A rotary spraying and dispersing device (103) is connected to a spraying regulating device (104) and is used for rotary spraying and dispersing concrete; the rotary spraying and dispersing device (103) includes a rotary spraying mixer (602), the rotary spraying mixer (602) includes a valve body (702) and a valve core (701) arranged in the valve body (702), the valve core (701) is a rotating body, the valve core (701) has a trailing edge (802), an outer conical surface (807) and a concrete flow channel (806) connecting the two ends of the valve core (701), a swirl channel (803) is provided on the outer conical surface (807) at a preset angle, and a plurality of swirl channels (803) are evenly distributed along the circumference of the outer conical surface (807); the valve core (701) is provided with high-pressure mixed gas holes (804) respectively connecting the swirl channels (803) and the concrete flow channel (806). ); the inner cavity (810) of the valve body (702) has a mounting end for sealingly cooperating with the trailing edge (802) and an inner conical surface (808) for matching with the outer conical surface (807); at least two groups of mixing nozzles (811) are provided on the valve body (702) at axial positions corresponding to the high-pressure mixed gas hole (804), for connecting to an external high-pressure air duct and a quick-setting agent pipeline respectively; the length of the valve body (702) is greater than the length of the valve core (701) so that the inner cavity (810) of the valve body (702) forms a mixing cavity (812) at the outlet end of the valve core (701); the inner wall of the concrete flow channel (806) is provided with a flow control structure (805) on the side of the high-pressure mixed gas hole (804) close to the inlet end of the valve core (701), for preventing concrete from flowing back into the high-pressure mixed gas hole (804); The template device (102) is connected to the spraying adjustment device (104) and is used to adjust the thickness of the concrete spraying; A detection system (105), provided on the spraying regulating device (104), is used to detect the density of the sprayed concrete; The walking system (112) is connected to the vehicle frame (106) and is used to provide power for the vehicle frame (106) to travel.

2. The UHPC ultra-high performance concrete spraying trolley according to claim 1, characterized in that: The rotary jetting and breaking up device (103) further comprises a delivery pipe (601) and a venturi-type nozzle (603), wherein the venturi-type nozzle (603) is arranged at the outlet end of the rotary jetting mixer (602), and the delivery pipe (601) is arranged at the inlet end of the rotary jetting mixer (602). The inner diameter of the delivery pipe (601) gradually decreases to a preset value from the inlet end to the outlet end, and the delivery pipe (601) is used to input the concrete of gradually varying volume and flow rate into the rotary jetting mixer (602).

3. The UHPC ultra-high performance concrete spraying trolley according to claim 1, characterized in that: The template device (102) comprises a rolling mechanism (401) and a flexible template (404) wrapped around the rolling mechanism (401); the flexible template (404) is used to limit the spraying range of concrete; a scraper (403) and a roller (402) connected to a release agent pipeline are fixedly provided on the rolling mechanism (401); the rolling mechanism (401) is used to tension the flexible template (404); and is also used to drive the flexible template (404) to roll along the rolling mechanism (401) so that the roller (402) uniformly releases the release agent and uniformly applies the release agent to the surface of the flexible template (404); and is also used to drive the flexible template (404) so ​​that the scraper (403) scrapes off the concrete rebound material adhering to the flexible template (404).

4. The UHPC ultra-high performance concrete spraying trolley according to claim 1, characterized in that: The template device (102) further comprises a spray ruler device, which is respectively connected to the template device (102) and the spray adjustment device (104); the spray ruler device comprises a ruler (1101) and a spray ruler telescopic mechanism (1102); the spray ruler telescopic mechanism (1102) is respectively connected to the spray adjustment device (104) and the template device (102); the ruler (1101) is used to indicate the telescopic amount of the spray ruler telescopic mechanism (1102).

5. The UHPC ultra-high performance concrete spraying trolley according to claim 1, characterized in that: The ring rail positioning device (101) comprises a ring rail frame (201) and a bidirectional telescopic mechanism (202); the ring rail frame (201) is connected to the vehicle frame (106) via the bidirectional telescopic mechanism (202); and the bidirectional telescopic mechanism (202) comprises a vertical telescopic mechanism (301) and a horizontal telescopic mechanism (302).

6. The UHPC ultra-high performance concrete spraying trolley according to claim 5, characterized in that: The spray adjustment device (104) comprises a nozzle rotating mechanism (901), an arm rotating mechanism (902) and an arm traveling mechanism (903), and the arm traveling mechanism (903) is connected to the ring rail frame (201).

7. The UHPC ultra-high performance concrete spraying trolley according to claim 1, characterized in that: The spraying trolley also includes: A pumping variable system (110), provided on the vehicle frame (106), is used for pumping concrete and adjusting the concrete pumping amount; The fluid metering system (108) is arranged on the vehicle frame (106) and is used to control the amount of additives added.

8. The UHPC ultra-high performance concrete spraying trolley according to claim 1, characterized in that: The detection system (105) includes a protective cover (1002) installed on the injection regulating device (104) and a microwave broadband radar (1001) arranged in the protective cover (1002).

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