Low-resilience high-performance concrete spraying system

Abstract

The utility model provides a low-resilience high-performance concrete spraying system. The low-resilience high-performance concrete spraying system comprises a concrete spraying machine (1), a spraying mechanical arm (2), a spraying head (3) and a signal acquisition unit (4), the spraying head (3) is installed on the spraying mechanical arm (2) and connected with the concrete spraying machine (1) through a pipeline, and the signal collecting unit (4) is used for collecting working parameters of the spraying head (3); the device further comprises an air compressor (8) and an accelerator system (9), the air compressor (8) and the accelerator system (9) are connected with the spray head (3) through pipelines respectively, and the air compressor (8) feeds compressed air into the spray head (3). And the accelerator system (9) is used for feeding a liquid accelerator into the spray head (3). The spraying angle, the spraying distance and the spraying speed can be adjusted according to needs, so that a sprayed concrete structure formed by jet flow is more compact, and the performance of concrete is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shotcrete equipment systems, in particular to a low-rebound and high-performance shotcrete spraying system. Background Art

[0002] As an intermediate process of tunnel construction using drill and blast method, the construction quality and concrete performance of shotcrete have not been taken seriously for a long time. With the continuous improvement of engineering construction standards, the quality and efficiency of shotcrete construction (high performance and rebound waste) have attracted more and more attention from the industry.

[0003] In terms of low-rebound high-performance shotcrete, the prior art has conducted relevant research. For example, CN 116291581A discloses a low-rebound shotcrete and wet shotcrete system and construction process, which uses dry powder accelerator and rebound inhibitor to control the rebound rate and improve the compressive strength of hardened concrete; CN114528820B discloses a shotcrete rebound suppression method based on full-process control, which reduces the rebound rate of shotcrete construction by clarifying the key parameters of wet shotcrete mix ratio, key functional materials and shotcrete process; but the shotcrete process involved still uses conventional processes, and fails to achieve the control and adjustment of key shotcrete process parameters, and reduce the influence of operators on the rebound rate of shotcrete. Therefore, in order to completely solve the problem of high rebound rate of high-performance shotcrete, this paper proposes a low-rebound high-performance shotcrete spraying system, which can reduce the influence of personnel operation on the rebound of the spraying. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art, provide a low-rebound and high-performance shotcrete spraying system, and solve the technical problem that the prior shotcrete system is difficult to form an ideal jet.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A low-rebound high-performance shotcrete spraying system comprises a concrete spraying machine, a spraying mechanical arm, a spray head and a signal acquisition unit; the spray head is installed on the spraying mechanical arm and connected to the concrete spraying machine through a pipeline; the signal acquisition unit is used to collect the working parameters of the spray head; and it also comprises an air compressor and an accelerator system, the air compressor and the accelerator system are respectively connected to the spray head through pipelines, the air compressor delivers compressed air into the spray head; the accelerator system delivers liquid accelerator into the spray head.

[0007] Optionally or preferably, it also includes a signal acquisition unit, a calculation control unit, and an operation execution unit; the signal acquisition unit is installed on the nozzle and connected to the calculation control unit; the calculation control unit is connected to the operation execution unit.

[0008] Optionally or preferably, it also includes a human-machine interface; the human-machine interface is connected to the computing control unit.

[0009] Optionally or preferably, the signal acquisition unit includes a distance sensor, an angle sensor, a displacement sensor, and a pressure sensor; the signals collected by the signal acquisition unit include but are not limited to the distance of the nozzle of the sprinkler head relative to the injection surface, the angle of the nozzle of the sprinkler head relative to the injection surface, the movement speed and instantaneous residence time of the concrete material.

[0010] Optionally or preferably, the computing control unit is an industrial computer for engineering; the operation execution unit is a controller with an I / O module and a solenoid valve group.

[0011] Optionally or preferably, the nozzle maintains a distance of 1-1.5m from the sprayed surface during the spraying operation, a spraying angle of 70-90°, a spraying speed of 15-18m / s, and a spraying wind pressure of 0.3-0.6Mpa.

[0012] Based on the above technical solution, the following technical effects can be produced:

[0013] The utility model provides a low-rebound high-performance shotcrete spraying system, which can adjust the spraying angle, spraying distance and speed according to needs, so that the spraying concrete structure formed by the jet is more compact, thereby improving the performance of the concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the low-rebound shotcrete spraying system of the present invention;

[0016] Figure 2 It is a system principle diagram of the mechanized spraying system of low-rebound sprayed concrete in the present invention;

[0017] In the figure: 1-concrete spraying machine, 2-spraying mechanical arm, 3-spraying head, 4-signal acquisition unit, 5-computing control unit, 6-operation execution unit, 7-human-machine interface, 8-air compressor, 9-accelerator system. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0019] In a preferred embodiment:

[0020] like Figure 1-Figure 2 As shown:

[0021] The present embodiment provides a low-rebound high-performance shotcrete spraying system, comprising a concrete spraying machine 1, a spraying mechanical arm 2 and a spray head 3; the spray head 3 is installed on the spraying mechanical arm 2 and connected to the concrete spraying machine 1 through a pipeline; it also includes an air compressor 8 and an accelerator system 9, the air compressor 8 and the accelerator system 9 are respectively connected to the spray head 3 through pipelines, the air compressor 8 delivers compressed air into the spray head 3; the accelerator system 9 delivers liquid accelerator into the spray head 3.

[0022] In this embodiment, it also includes a signal acquisition unit 4, a calculation control unit 5, and an operation execution unit 6; the signal acquisition unit 4 is installed on the nozzle 3 and connected to the calculation control unit 5; the calculation control unit 5 is connected to the operation execution unit 6;

[0023] Furthermore, in this embodiment, a human-machine interface 7 is also included; the human-machine interface 7 is connected to the calculation control unit 5 .

[0024] Furthermore, in this embodiment, the signal acquisition unit 4 includes a distance sensor, an angle sensor, a displacement sensor, and a pressure sensor; the signals collected by the signal acquisition unit 4 include but are not limited to the distance of the nozzle of the sprinkler 3 relative to the injection surface, the angle of the nozzle of the sprinkler 3 relative to the injection surface, the movement speed and instantaneous residence time of the concrete material.

[0025] Further, in this embodiment, the computing control unit 5 is an engineering industrial computer, specifically, the engineering industrial computer is a Beckhoff CX C6000 series industrial computer; the operation execution unit 6 is a controller with an I / O module and a solenoid valve group; specifically, the controller is a Hi-Fi CP52-HPC6 controller. This application does not involve the creation of a computer program and can be implemented by existing control devices.

[0026] Furthermore, in this embodiment, the nozzle 3 maintains a distance of 1-1.5 m from the sprayed surface during the spraying operation, a spraying angle of 70-90°, a spraying speed of 15-18 m / s, and a spraying wind pressure of 0.3-0.6 MPa.

[0027] The low-rebound high-performance shotcrete spraying system provided in this embodiment has the following advantages:

[0028] (1) This embodiment can solve the problems of high rebound rate and harsh working environment during construction;

[0029] (2) This embodiment ensures the stability of concrete quality and can effectively control the rebound rate of shotcrete within 10%;

[0030] (3) This embodiment can realize automatic adjustment of injection as needed.

[0031] In this embodiment, concrete spraying can be completed automatically or manually.

[0032] The automatic working principle is as follows:

[0033] 1. The signal acquisition unit 4 obtains the distance between the nozzle and the sprayed surface in real time: the axial direction of the nozzle 3 is set to the Z direction, the lateral direction of the first sensor is parallel to the Z direction, and the distance between the first sensor and the sprayed surface is measured to be L 1测 , the distance from the nozzle is L 0 , then the distance from the nozzle to the sprayed surface is L 喷 =L 1测 -L 0 ;

[0034] 2. The signal acquisition unit 4 obtains the angle of the nozzle relative to the sprayed surface in real time: Assume that the origin position measured by the first sensor is O, the second sensor measurement line is in the XOZ plane and the angle with the Z axis is α, and the distance between the second sensor and the sprayed surface is L 2测 , the measuring line of the third sensor is in the YOZ plane and the angle between it and the Z axis is β, and the distance between the third sensor and the sprayed surface is L 3测 , then the angle θ between the nozzle and the sprayed surface is:

[0035]

[0036] 3. The signal acquisition unit 4 obtains the concrete spraying speed in real time: set the distance S at the nozzle 0 The pressures measured by the two pressure sensors are P 1 , P 2 , the air compressor system pressure is P 0 , then the injection velocity v 喷 for:

[0037] v 喷 =t 1 P 1 2 +t 2 P 22 +t 3 P 1 +t 4 P 2 +t 5 P 1 P 2 S 0 +t 6

[0038] In the formula, t 1 ,t 2 ,t 3 ,t 4 ,t 5 ,t 6 All are regression coefficients.

[0039] 4. Identify and automatically adjust each parameter, specifically:

[0040] (1) Set the standard spray distance to L 0 , adjust the distance to ΔL:

[0041] When L 喷 >L 0 +ΔL, the distance between the current nozzle and the sprayed surface is reduced;

[0042] When L 喷 <L 0 -ΔL, the distance between the current nozzle and the sprayed surface is increased;

[0043] When L 0 -ΔL<L 喷 <L 0 +ΔL, the distance between the current nozzle and the sprayed surface is maintained;

[0044] (2) Set the ideal angle of nozzle 3 relative to the spraying surface to θ 0 (90°), the adjustment angle is Δθ:

[0045] When θ<θ 0 When -Δθ, the angle between the current nozzle and the sprayed surface is increased;

[0046] When θ 0 -Δθ<θ<θ 0 , the angle between the current nozzle and the sprayed surface is maintained.

[0047] (3) Set the ideal concrete spraying velocity as v 0 , the variable adjustment amount is Δv;

[0048] When v 喷 >v 0 When +Δv, the current injection speed is reduced, that is, the air pressure and air volume of the air compressor are reduced;

[0049] When v 喷 <v 0 When -Δv, the current injection speed is increased, that is, the air pressure and air volume of the air compressor are increased;

[0050] When v 0 -Δv<v 喷 <v 0 +Δv, the current injection speed is maintained, that is, the air pressure and air volume of the air compressor are kept unchanged;

[0051] When v 喷 When it is 0, the injection is stopped.

[0052] When using manual control,

[0053] According to the above method, the angle θ between the nozzle and the sprayed surface and the spray velocity v are measured. 喷 and the adjustment distance is ΔL, and these parameters are displayed on the human-machine interface 7, and the operator manually adjusts the injection robot arm 2, the nozzle 3, the air compressor 8 and the quick-setting agent system 9 according to the displayed data.

[0054] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A low-rebound high-performance shotcrete spraying system, characterized by: The invention comprises a concrete spraying machine (1), a spraying mechanical arm (2), a spray head (3) and a signal acquisition unit (4); the spray head (3) is installed on the spraying mechanical arm (2) and connected to the concrete spraying machine (1) through a pipeline, and the signal acquisition unit (4) is used to collect working parameters of the spray head (3); and the invention also comprises an air compressor (8) and an accelerator system (9); the air compressor (8) and the accelerator system (9) are respectively connected to the spray head (3) through pipelines, the air compressor (8) sends compressed air into the spray head (3); and the accelerator system (9) sends liquid accelerator into the spray head (3).

2. A low-rebound high-performance shotcrete spraying system according to claim 1, characterized in that: It also comprises a signal acquisition unit (4), a calculation control unit (5), and an operation execution unit (6); the signal acquisition unit (4) is installed on the nozzle (3) and connected to the calculation control unit (5); the calculation control unit (5) is connected to the operation execution unit (6).

3. A low-rebound high-performance shotcrete spraying system according to claim 2, characterized in that: It also includes a human-machine interface (7); the human-machine interface (7) is connected to the computing control unit (5).

4. A low-rebound high-performance shotcrete spraying system according to claim 2, characterized in that: The signal acquisition unit (4) comprises a distance sensor, an angle sensor, a displacement sensor, and a pressure sensor; the signals acquired by the signal acquisition unit (4) include but are not limited to the distance of the nozzle of the nozzle (3) relative to the injection surface, the angle of the nozzle of the nozzle (3) relative to the injection surface, the movement speed and instantaneous residence time of the concrete material.

5. A low-rebound high-performance shotcrete spraying system according to claim 2, characterized in that: The calculation control unit (5) is an industrial computer for engineering; the operation execution unit (6) is a controller with an I / O module and a solenoid valve group.

6. A low-rebound high-performance shotcrete spraying system according to claim 1, characterized in that: During the spraying operation, the nozzle (3) maintains a distance of 1-1.5 m from the sprayed surface, a spraying angle of 70-90°, a spraying speed of 15-18 m / s, and a spraying wind pressure of 0.3-0.6 Mpa.

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