UHPC (Ultra High Performance Concrete) spraying trolley

Abstract

The invention discloses a UHPC (Ultra High Performance Concrete) spraying trolley which comprises a frame used for supporting; the spraying adjusting device is used for adjusting the spraying angle and / or the spraying position of the concrete; the circular track positioning device is connected to the frame, is used as a walking track of the injection adjusting device and is used for adjusting the position relative to the frame so as to center the design center of the construction site; the rotary spraying and scattering device is connected to the spraying adjusting device and used for carrying out rotary spraying and scattering on the concrete; the formwork device is connected to the spraying adjusting device and used for adjusting the concrete spraying thickness; the detection system is arranged on the spraying adjusting device and used for detecting the compactness of sprayed concrete; and the walking system is connected to the frame and used for providing power for walking of the frame. According to the spraying and building trolley, spraying and lining of ultra-high performance concrete are achieved, the investment of constructors is greatly reduced, the labor intensity and the safety risk of workers are reduced, the comprehensive cost of building construction is reduced, and the construction efficiency is improved.

Description

Technical Field

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

[0002] As an important process for tunnel shaft support, concrete spraying support is widely used in railways, highways, water conservancy, national defense, metallurgy and other fields. Its working principle is to use fluid power to transport premixed concrete through pipelines and spray it at high speed on the sprayed surface. It relies on the continuous impact and compaction of concrete during the spraying process to form a concrete layer. As the most innovative cement-based engineering material in the past 30 years, UHPC ultra-high performance concrete has gradually been applied to bridges, buildings, tunnels and special projects. Its principle is to optimize the combination of active fillers and inert fillers through the principle of close stacking to form a dense and uniform material matrix. In an extremely low water-cement ratio environment, the porosity caused by cement hydration is very low, forming an almost impermeable matrix with ultra-high durability, ultra-high mechanical properties, ultra-strong fluidity and ultra-high viscosity.

[0003] Existing template spraying and template spraying technologies are assembled using conventional concrete spraying devices, spraying manipulators and assembled templates or block templates similar to lining trolleys on the market, and do not fundamentally solve the problems of ultra-high performance concrete being difficult to spray and disperse, sprayed concrete strength and density being difficult to control, concrete rebound and poor molding, high spraying profile accuracy requirements, and sprayed concrete density being difficult to detect. For example, publication number CN109356619B discloses a new type of concrete mold spraying equipment, including a carrier mechanism, a large arm mechanism, a template mechanism and a nozzle assembly, the carrier mechanism is provided with a large arm mechanism, the large arm mechanism includes a swivel large arm, and a template mechanism and a nozzle assembly are provided at the front end of the swivel large arm, the template mechanism can form a mold cavity with the excavated rock surface, and the nozzle assembly can adjust the injection angle / direction relative to the mold cavity. By using the mold spraying trolley, zero rebound can be achieved. Within the same operating range, the amount of concrete can be reduced by 20%-40%, and the amount of accelerating agent can be reduced at the same time, with significant economic and social benefits; the concrete surface is highly smooth and does not require post-shaping, shortening the construction period and greatly improving production efficiency; the mechanical construction can be remotely controlled throughout the entire process, greatly 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 force the rebound material of the sprayed concrete to rebound to the concrete spraying surface through the template mechanism. Through the same type of mold spraying experiments on the market, first of all, this technology not only cannot really solve the concrete rebound problem and reduce the amount of concrete, but its sprayed rebound material will adhere to the concrete spraying surface in the form of floating dust particles, causing the overall density of the sprayed concrete to drop significantly, and the formed concrete will have stratification and slag falling phenomena, resulting in the strength and surface finish of the sprayed concrete failing to meet the standard requirements, and has no practical promotion significance; secondly, the filling of the template space is achieved by adjusting the nozzle angle. Once the spraying angle changes The path of shotcrete will change, and then there will be the problem of shotcrete voids, which will seriously affect the quality and intensity of concrete shotcrete. Then, this patented technology is only applicable to conventional concrete spraying, and it cannot break up ultra-high performance concrete and accelerator, adjust the flow direction and thickness of concrete. It will also cause ultra-high performance concrete and accelerator to directly contact in the mixer cavity, resulting in rapid solidification of ultra-high performance concrete and backflow of accelerator, which will block the high-pressure air holes and the pipelines before and after the nozzle mixer, causing injection pipe blockage, poor injection effect, low concrete injection intensity and more rebound. It is not suitable for UHPC ultra-high performance and 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 is arranged on the frame, the panel abuts against the arch on the inner wall of the tunnel, so that a cavity is formed on the inner wall of the tunnel, and the cavity comprises: an upper port and a lower port in opposite positions; an adjusting component, the adjusting component is arranged on the frame, and the adjusting component has multiple degrees of freedom; a nozzle, the nozzle is arranged on the adjusting component, a mixture of compressed air and concrete is introduced into the slurry inlet end of the nozzle, and the slurry outlet end of the nozzle faces the upper port of the cavity. In the above-mentioned tunnel support concrete spraying device, not only the material waste of concrete is 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 then improving the quality of the tunnel support. The actual principle of reducing the waste of concrete materials described in this scheme 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. It is demonstrated through experiments on similar mold spraying on the market that the sprayed rebound material will adhere to the concrete spraying surface in the form of floating dust particles. Although the problem of decreased density caused by floating dust adhesion can be solved by vibration, vibration will make the formwork and shotcrete adhere more tightly, making it difficult to demold the formwork and easy to stick to the spraying surface, seriously affecting the spraying forming surface of the concrete. Summary of the invention

[0004] The invention provides a UHPC ultra-high performance concrete spraying trolley to solve the technical problems that the existing spraying trolley is only suitable for conventional concrete but not for ultra-high performance concrete with high spraying quality requirements, as well as has high manual 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] The frame is used as a support;

[0007] A spraying adjustment device, used to adjust the spraying angle and / or spraying position of concrete;

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

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

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

[0011] A detection system, arranged in the spraying adjustment 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 spraying breaking device includes a rotary spraying 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 trailing edge, an outer cone and a concrete flow channel connecting the two ends of the valve core, a swirl channel is arranged at a preset angle on the outer cone, and a plurality of the swirl channels are evenly arranged along the circumference of the outer cone; high-pressure mixing gas holes respectively connecting the swirl channel and the concrete flow channel are opened on the valve core; the inner cavity of the valve body has a mounting end for sealing with the trailing edge and an inner cone for matching with the outer cone, at least two groups of mixing nozzles are arranged on the valve body at the axial position corresponding to the high-pressure mixing gas hole, which are used to connect the external high-pressure air duct and the quick-setting agent pipeline respectively; 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 at one 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 to a preset value from the inlet end to the outlet end, 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 fixedly provided with a scraper and a roller connected to a 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 injection control device. The spray ruler device includes a ruler and a spray ruler telescopic mechanism. The spray ruler telescopic mechanism is respectively connected to the injection 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 two-way telescopic mechanism. The ring rail frame is connected to the vehicle frame via the two-way telescopic mechanism. The two-way 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 rotating mechanism, an arm rotating mechanism and an arm walking mechanism, and the arm walking mechanism is connected to the ring rail frame.

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

[0021] A variable pumping system, which is arranged on the frame and is used for pumping concrete and adjusting the concrete pumping volume;

[0022] The fluid metering system is arranged 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 frame is driven by the traveling system 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 sticking to the pipeline and clogging the nozzle is eliminated. The template device adjusts and limits the spraying thickness of concrete to ensure the spraying construction process and the overall quality of concrete construction, 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 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.

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

[0027] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the 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 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 schematic diagram of a 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 is a schematic structural 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 of a preferred embodiment of the present invention;

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

[0036] Fig. 9 2 is a schematic structural diagram of a rotary jet mixer according to a preferred embodiment of the present invention;

[0037] Fig.10 It is a structural schematic diagram of a valve core in a preferred embodiment of the present invention;

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

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

[0040] Fig.13 is a structural schematic diagram of a valve body in a preferred embodiment of the present invention;

[0041] Fig.14 The structure of the injection adjustment device of the preferred embodiment of the present invention is shown in FIG. Figure 1;

[0042] Fig.15 The structure of the injection adjustment device of the preferred embodiment of the present invention is shown in FIG. Figure 2 ;

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

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

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

[0046] Fig.19 It is a structural schematic diagram of a pumping variable 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 ruler system 110, pumping variable system 111, control system 112, walking system 201, ring rail frame 202, two-way telescopic mechanism 203, three-dimensional 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 rotating mechanism 902, boom rotating mechanism 903, boom walking 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 19 As shown, the UHPC ultra-high performance concrete spraying trolley of this embodiment includes:

[0051] A frame 106, used as a support;

[0052] A spraying adjustment device 104, used to adjust the spraying angle and / or spraying position of concrete;

[0053] The ring rail positioning device 101 is connected to the 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 frame 106 so as to center the design center of the construction site;

[0054] The rotary spraying and breaking 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 arranged 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 frame 106 and is used to provide power for the 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 according to the signals to achieve intelligent control. Its structure, principle, etc. are based on existing technologies and will not be elaborated on in detail.

[0059] The working principle of the 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 The strength and quality of concrete spraying are improved, and the risk of concrete adhering to pipelines 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 spraying dispersing device 103 includes a rotary spraying mixer 602, a delivery pipe 601 and a venturi nozzle 603. The venturi nozzle 603 is arranged at the outlet end of the rotary spraying mixer 602, and the delivery pipe 601 is arranged at the inlet end of the rotary spraying 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 gradual volume and flow rate into the rotary spraying mixer 602, so that the concrete flow rate is gradually accelerated while preventing blockage. The rotary spraying mixer 602 introduces an external quick-setting agent and high-pressure gas to mix and disperse the ultra-high performance concrete. The rotary spraying mixer 602 fully disperses the ultra-high performance concrete based on its internal design and outputs it 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 being blocked 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 disposed 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 gas flow and the 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, and improves 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 they are gradually pressurized before entering the mixing area, thereby improving the kinetic energy and mixing effect of the fluid; in specific settings, 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, thereby ensuring that the fluid The outer wall surface of the rear edge 802 of the valve core 701 is provided with a sealing groove 801, which is used to embed a sealing ring and seal with the valve body 702. The rear 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 groups of mixing nozzles 811 are provided on the valve body 702 at the axial position corresponding to the high-pressure mixed gas hole 804, 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 corresponding to the mixing nozzle 811, so that the introduced high-pressure gas and 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, accelerating setting agent and high-pressure gas; the high-pressure airflow and 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 quick-setting agent flows along the swirl channel 803, and the swirl channel 803 forms an angle with the axis of the valve core 701. Therefore, a rotational thrust is applied to the valve core 701 during the flow of the fluid. 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, which increases the contact area and time of the mixture. The high-pressure mixing air hole 804 introduces the high-pressure airflow and the quick-setting agent into the concrete channel, and the mixture is mixed in the valve core 701 to be dispersed.

[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 reversely 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 the accelerator can smoothly enter the mixing area and maintain 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 reversely 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 on the rolling mechanism 401, the flexible template 404 is used to limit the spraying range of concrete, and a scraper 403 and a roller 402 connected to the release agent pipeline are fixedly arranged 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 and evenly 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 sticking to the flexible template 404; wherein, the flexibility of the template is 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 the 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 external release agent pipeline at 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 mold sprayed concrete and the falling off and scraping of the concrete rebound material, thereby improving the concrete forming quality and effect.

[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 control device. 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 according to 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 driving 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 driving 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 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 frame 106 by bolts and is used for tunnel contour scanning and ring rail positioning; the bidirectional telescopic mechanism 202 is fixed to the frame 106 by bolts, and the bidirectional telescopic mechanism 202 is controlled by the control system 111 to perform corresponding actions; the ring rail frame 201 is fixed to the bidirectional telescopic mechanism 202, and the alignment of the ring rail frame and the central axis of the tunnel is achieved through the telescopic adjustment of the bidirectional telescopic mechanism 202. The relative position of the ring rail frame 201 and the tunnel axis is automatically positioned by the bidirectional telescopic mechanism 202, thereby improving the positioning accuracy of the equipment in the tunnel, thereby improving the running track accuracy of the working device on the ring rail frame 201, realizing the leveling spraying of concrete, improving the construction quality, and reducing the manual labor and safety hazards caused by spraying bulges.

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

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

[0070] A hydraulic system 107, which provides hydraulic power to the equipment;

[0071] The variable pumping system 110 is provided on the vehicle frame 106 and is used for pumping concrete and adjusting the concrete pumping amount, so as to adjust the pumping amount 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 arranged on the 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 the ultra-high performance of the shotcrete; it includes a flow meter, an accelerator pump, and an air compressor; the flow meter can accurately control the amount of additives required for the shotcrete to meet the high requirements of ultra-high performance concrete on the mix ratio; the accelerator pump is used to add accelerators to the shotcrete; the air compressor is used to provide a quantitative 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 swing frequency signal of the pumping mechanism 1203 and feeds it back to the control system 111, performs calculations, and cooperates with the control system 111 to control The concrete pumping displacement is manually adjusted according to the characteristics of different concretes, so that the concrete can be fully broken up while 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, to 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, and is implemented using the microwave broadband radar 1001 of the prior art; 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 above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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 circular rail positioning device (101), connected to a vehicle frame (106), used as a running track of a spray adjustment device (104) and 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), connected to the spraying regulating device (104), is used for rotary spraying and dispersing concrete; 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), arranged on the spraying adjustment device (104), is used to detect the density of the sprayed concrete; The walking system (112) is connected to the frame (106) and is used to provide power for the frame (106) to travel.

2. The UHPC ultra-high performance concrete spraying trolley according to claim 1 is characterized in that: The rotary spraying and dispersing device (103) comprises a rotary spraying mixer (602), wherein the rotary spraying and dispersing device (602) comprises a valve body (702) and a valve core (701) arranged in the valve body (702), wherein the valve core (701) is a rotating body, wherein 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), wherein a swirl channel (803) is arranged on the outer conical surface (807) at a preset angle, and a plurality of swirl channels (803) are evenly arranged along the circumference of the outer conical surface (807); and wherein the valve core (701) is provided with a plurality of swirl channels (803) respectively connecting the swirl channels (803) and the outer conical surface (807). The high-pressure mixed gas hole (804) of the concrete flow channel (806); the inner cavity (810) of the valve body (702) has a mounting end for sealingly matching 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), which are used to connect 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 through cavity (812) at the outlet end of the valve core (701).

3. The UHPC ultra-high performance concrete spraying trolley according to claim 2 is characterized in that: The inner wall of the concrete flow channel (806) is provided with a flow control structure (805) on one side of the high-pressure mixed gas hole (804) close to the inlet end of the valve core (701) to prevent concrete from flowing back into the high-pressure mixed gas hole (804).

4. The UHPC ultra-high performance concrete spraying trolley according to claim 2 is characterized in that: The rotary spraying and dispersing 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 spraying mixer (602), and the delivery pipe (601) is arranged at the inlet end of the rotary spraying 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 with gradually varying volume and flow rate into the rotary spraying mixer (602).

5. 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 arranged 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 sticking to the flexible template (404).

6. 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 control device; 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 mark the telescopic amount of the spray ruler telescopic mechanism (1102).

7. 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); the bidirectional telescopic mechanism (202) comprises a vertical telescopic mechanism (301) and a horizontal telescopic mechanism (302).

8. The UHPC ultra-high performance concrete spraying trolley according to claim 1, characterized in that: The spray adjustment device (104) comprises a spray head rotating mechanism (901), an arm rotating mechanism (902) and an arm walking mechanism (903), and the arm walking mechanism (903) is connected to the ring rail frame (201).

9. 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), arranged 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 additive added.

10. The UHPC ultra-high performance concrete spraying trolley according to claim 1, characterized in that: The detection system (105) comprises 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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