Ultrahigh-toughness concrete spraying device

Abstract

The utility model discloses an ultrahigh toughness concrete spraying device which comprises a spraying machine, a compressor unit, a distribution box and a conveying pipeline, the compressor unit is a two-stage compression system formed by connecting a low-pressure-stage frequency conversion compressor and a high-pressure-stage frequency conversion compressor in series, and the low-pressure-stage frequency conversion compressor and the high-pressure-stage frequency conversion compressor are connected through an air pressure connecting pipe; through a two-stage compression system and closed-loop feedback control, the problems of large pressure fluctuation and high energy consumption are solved, the pressure sensor monitors the pressure in the nozzle in real time, and the controller dynamically adjusts the operation parameters of the compressor according to data, so that the pressure is stable, the spraying is uniform, the concrete quality is improved, and the system is suitable for long-distance operation; the low-pressure-stage variable-frequency compressor is matched with the high-pressure-stage variable-frequency compressor, the efficiency of the compressors under different working conditions is improved, the energy consumption is reduced, the construction cost is reduced, the spiral flow deflector in the rotational flow premixing cavity enables materials to move spirally, and the ultrasonic nebulizer is combined, so that the mixing uniformity is remarkably improved, the rebound rate is reduced, and the material waste is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of construction engineering machinery, in particular to a super high toughness concrete injection device. BACKGROUND

[0002] The super high toughness concrete injection device is widely used in the fields of tunnel, bridge, building and other engineering. In tunnel engineering, it is used for initial support and lining, can quickly form a concrete support layer, and ensures the stability of the tunnel; in bridge engineering, it is used for reinforcing and repairing the bridge structure, and improves the durability and bearing capacity; in building engineering, it is used for high-rise building foundation engineering and basement construction, and improves the construction efficiency and quality.

[0003] However, the existing concrete injection device has many defects: on the one hand, the pressure fluctuation is large, the compressor output pressure does not match the demand of the guniting machine, which leads to uneven injection, affects the quality of concrete, is not suitable for long distance operation, has high energy consumption, the single-stage compressor has low efficiency under high pressure working condition, and construction cost is increased; the rebound rate is high, the material mixing is insufficient in dry spraying process, and the wet spraying process relies on complex pipeline, which leads to material waste and increased construction difficulty. The intelligence is insufficient, the pressure regulation depends on manual experience, the working condition change cannot be dynamically adapted, and the construction efficiency and quality are affected.

[0004] Therefore, the super high toughness concrete injection device is provided. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a super high toughness concrete injection device to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a super high toughness concrete injection device, comprising a guniting machine, a compressor unit, a distribution box and a conveying pipeline, the compressor unit is composed of a low-pressure variable frequency compressor and a high-pressure variable frequency compressor in series to form a two-stage compression system, and the two are connected through a gas pressure connecting pipe;

[0007] A high-precision pressure sensor is installed inside the nozzle of the guniting machine, and the pressure sensor forms a closed-loop feedback control loop with a controller inside the compressor unit through a signal line;

[0008] A cyclone premixing cavity with a jacket on its inner wall is arranged at the feeding port of the guniting machine, the inner wall of the cyclone premixing cavity is provided with spiral guide vanes, and a spiral channel for material flow is formed between the cyclone premixing cavity and the spiral guide vanes, and the output end of the compressor unit is in positive communication with the feeding end of the spiral channel through a first high-pressure gas pipe, a second high-pressure gas pipe is connected to one side of the conveying pipeline close to the nozzle and connected to the other output end of the compressor unit.

[0009] Preferably, the nozzle is integrated with an ultrasonic atomizer, the vibration frequency of the atomizer is -kHz, and the atomizer is electrically connected with a miniature electromagnetic valve on the external additive pipeline, for adding a quick-setting agent to cooperate with the atomizer, so as to improve the cohesiveness of the sprayed material.

[0010] Preferably, a heat conduction pipe is connected to the exhaust port of the compressor unit, the outlet end of the heat conduction pipe is connected to the inside of the jacket, and the preheating generated by the compressor unit is delivered to the jacket through the heat conduction pipe to heat the material in the jacket, so that the mixing of the additives and the material in the cyclone premixing cavity for concrete is more uniform.

[0011] Preferably, the shotcrete machine and the compressor unit are connected by quick flanges, the quick flanges include a diesel power interface or an electric power interface, and the two are switched by a switching valve.

[0012] Preferably, the controller is provided with a PID algorithm module, the input end of the PID algorithm module receives real-time signals of a pressure sensor, and the output end of the PID algorithm module is connected to frequency converters of the low-pressure stage variable frequency compressor and the high-pressure stage variable frequency compressor.

[0013] Preferably, an adaptive safety relief valve is installed on the conveying pipeline, the safety relief valve is provided with a pressure grading release module, and the trigger threshold of the safety relief valve is dynamically adjusted according to a pressure set value output by the controller.

[0014] Preferably, an Internet of Things communication module is arranged outside the shotcrete machine shell, the module is connected to the controller, and the module is configured to upload equipment operation parameters to a remote monitoring platform through a LoRa / WiFi protocol.

[0015] Preferably, a transfer trolley is detachably installed at the bottom of the shotcrete machine and the compressor unit, and a feeding hopper is connected to the upper end of the cyclone premixing cavity.

[0016] Compared with the prior art, the shotcrete machine has the following beneficial effects:

[0017] 1. The shotcrete machine solves the problems of large pressure fluctuation and high energy consumption by means of a two-stage compression system and closed-loop feedback control, a pressure sensor monitors the pressure in the nozzle in real time, a controller dynamically adjusts the operation parameters of the compressor according to the data, the pressure is stabilized, the spraying is uniform, the quality of the concrete is improved, the shotcrete machine is suitable for long-distance operation, the low-pressure stage variable frequency compressor and the high-pressure stage variable frequency compressor are combined, the efficiency of the compressor under different working conditions is improved, the energy consumption is reduced, the construction cost is reduced, the material is in spiral motion in the cyclone premixing cavity, the mixing uniformity is significantly improved by combining the ultrasonic atomizer, the rebound rate is reduced, the material waste is reduced, and the construction economy is improved.

[0018] 2、The utility model discloses high intelligent degree, pressure regulation no longer depends on artificial experience, controller built-in PID algorithm module, can dynamic adaptation working condition change, optimization construction efficiency and quality, the introduction of internet of things communication module has realized equipment remote monitoring and trouble early warning, is convenient for in time maintenance, reduces the loss of shutdown;

[0019] In addition, the heat energy recycling device uses the preheating generated by the compressor unit to heat the material, promotes uniform mixing of the additive and the material, reduces energy consumption, and has the dual advantages of energy saving and improving the performance of concrete.

[0020] The quick flange design facilitates equipment connection and power source switching, improves the versatility and convenience of the equipment, and further enhances its competitiveness and practicality in the field of construction machinery. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the main structure schematic diagram of the utility model;

[0022] Figure 2 is the main body cross section structure schematic diagram of the utility model;

[0023] Figure 3 is the partial cross section structure schematic diagram of the utility model;

[0024] Figure 4 is the connection structure schematic diagram of the first high-pressure gas pipe and the spiral channel of the utility model.

[0025] In the figure: 1, shotcrete machine; 11, nozzle; 111, atomizer; 12, pressure sensor; 13, signal line; 14, cyclone premixing cavity; 141, spiral guide vane; 15, first high-pressure gas pipe; 16, additive pipeline; 161, miniature electromagnetic valve; 17, second high-pressure gas pipe; 18, feed hopper; 19, transfer car; 2, compressor unit; 21, low-pressure stage variable frequency compressor; 22, high-pressure stage variable frequency compressor; 23, gas pressure connecting pipe; 24, controller; 25, heat pipe; 3, conveying pipeline; 31, safety pressure relief valve; 4, quick flange; 41, diesel power interface; 42, electric interface. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to 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 the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0027] Embodiment 1: Please refer to Figures 1-4The utility model provides a technical scheme: a kind of super high toughness concrete injection device, including shotcrete machine 1, compressor unit 2, distribution box and conveying pipeline 3, compressor unit 2 is made of low pressure stage variable frequency compressor 21 and high pressure stage variable frequency compressor 22 series connection and constitutes two-stage compression system, and they are connected by air pressure connection pipe 23;

[0028] High-precision pressure sensor 12 is mounted inside the nozzle 11 of shotcrete machine 1, and the pressure sensor 12 forms a closed-loop feedback control loop with the controller 24 inside the compressor unit 2 through the signal line 13.

[0029] A swirl premixing cavity 14 with a jacket on its inner wall is provided at the feed inlet of the shotcrete machine 1. The swirl premixing cavity 14 has helical guide vanes 141 on its inner wall. Compared with traditional mechanical stirring, the present device uses a swirl field to achieve pneumatic stirring, eliminating the need for a mechanical stirrer and reducing energy consumption by more than 15%. A helical channel for material flow is formed between the swirl premixing cavity 14 and the output end of the compressor unit 2, and the conveying pipeline 3 is connected to the other output end of the compressor unit 2 through a second high-pressure gas pipe 17. The high-pressure gas stream output by the low-pressure stage variable frequency compressor 21 enters the swirl premixing cavity 14 through the first high-pressure gas pipe 15, forming a high-speed gas flow field. The dry materials and additives are wrapped and accelerated in the gas flow, thereby achieving the pushing of the materials.

[0030] In this embodiment, an ultrasonic atomizer 111 is integrated inside the nozzle 11. The atomizer 111 has a vibration frequency of 20-100 kHz and is electrically connected to a miniature electromagnetic valve 161 on the external additive pipeline 16. The ultrasonic atomizer 111 is used in conjunction with the miniature electromagnetic valve 161 to add a quick-setting agent, improving the adhesion of the sprayed materials.

[0031] In this embodiment, a heat pipe 25 is connected to the exhaust port of the compressor unit 2. The outlet end of the heat pipe 25 is connected to the inside of the jacket. The preheating generated by the compressor unit 2 is transferred to the materials in the jacket through the heat pipe 25 for heating. This makes the mixing of the additives and materials in the swirl premixing cavity 14 more uniform. The heat energy recovery device recovers the preheating generated by the compressor unit 2 for heating the materials, promoting the uniform mixing of the additives and materials while reducing energy consumption. This has the dual advantages of energy saving and improved concrete performance.

[0032] In this embodiment, a quick flange 4 is used to connect the shotcrete machine 1 and the compressor unit 2. The quick flange 4 includes a diesel-powered interface 41 or an electric interface 42. The two interfaces are connected through a switching valve 43 to switch the power source. The quick flange 4 is designed to facilitate the connection of the equipment and the switching of the power source, improving the versatility and convenience of the equipment and further enhancing its competitiveness and practicality in the field of construction machinery.

[0033] In the embodiment, the controller 24 is built-in with a PID algorithm module, the input end of which receives the real-time signal of the pressure sensor 12, and the output end of which is connected with the frequency converter on the low-pressure stage variable frequency compressor 21 and the high-pressure stage variable frequency compressor 22 respectively, and the adaptive safety relief valve 31 is installed on the delivery pipeline 3, the pressure grading release module is built-in in the safety relief valve 31, and the trigger threshold value of the safety relief valve 31 is dynamically adjusted according to the pressure set value output by the controller 24.

[0034] The guniting machine 1 is externally provided with an Internet of Things communication module, which is in data connection with the controller 24 and is configured to upload the equipment operation parameters to a remote monitoring platform through a LoRa / WiFi protocol, the equipment has a high degree of intelligence, the pressure regulation no longer depends on manual experience, the controller 24 is built-in with a PID algorithm module, which can dynamically adapt to the working condition change, and the construction efficiency and quality are optimized, the introduction of the Internet of Things communication module realizes the remote monitoring and fault early warning of the equipment, which is convenient for timely maintenance and reduces the loss of shutdown.

[0035] The bottom of the guniting machine 1 and the compressor unit 2 is jointly detachably installed with a transfer trolley 19, the transfer trolley 19 facilitates the transfer of the equipment, and the upper end of the cyclone premixing cavity 14 is connected with a feeding hopper 18, the feeding hopper 18 facilitates the feeding of materials into the premixing cavity.

[0036] The working principle is: in actual use, the transfer car 19 is moved to the construction site, then according to the energy supply condition of the construction site, the diesel power interface 41 or the electric power interface 42 is selected through the switching valve 43 on the quick flange 4, the power source is connected, then the concrete material is added to the cyclone premixing cavity 14 through the feeding hopper 18, if the accelerator and other additives need to be added, it is ensured that the additive pipeline 16 is connected normally, the miniature electromagnetic valve 161 can work normally, the power is turned on, the shotcrete machine 1 and the compressor unit 2 are started, at this time, the low-pressure variable frequency compressor 21 and the high-pressure variable frequency compressor 22 start to work, the two-stage compression system is formed through the air pressure connecting pipe 23, the pressure sensor 12 monitors the pressure in the nozzle 11 in real time, and the signal is transmitted to the controller 24 through the signal line 13, the controller 24 adjusts the operating parameters of the compressor dynamically according to the pressure data according to the built-in PID algorithm module, ensures the stability of the pressure, observes the running state of the equipment, checks whether the self-adaptive safety relief valve 31 is normal, whether the trigger threshold is dynamically adjusted according to the pressure set value output by the controller 24, when the equipment is debugged normally, the concrete spraying operation is started, the compressed air enters the spiral channel of the cyclone premixing cavity 14 through the first high-pressure air pipe 15, pushes the material to rotate under the action of the spiral guide vane 141, so that the material mixing is more uniform, at the same time, the preheating generated by the compressor unit 2 is transmitted to the jacket of the cyclone premixing cavity 14 through the heat pipe 25, further promotes the mixing of the additives and the material, in the spraying process, if the accelerator needs to be added, the miniature electromagnetic valve 161 can be controlled to be opened, the accelerator enters the nozzle 11 through the additive pipeline 16, the ultrasonic atomizer 111 atomizes the accelerator, improves the adhesion of the sprayed material;

[0037] During the operation, the equipment operating parameters are uploaded to the remote monitoring platform in real time through the Internet of Things communication module, the equipment state is monitored remotely by the operator, if the abnormality is found, the equipment parameters can be adjusted or maintained in time, after the spraying operation is completed, the shotcrete machine 1, the compressor unit 2 and the related valves are closed, the equipment and the conveying pipeline 3 are cleaned, and the equipment is properly stored for next use.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An ultra-high performance concrete spraying device comprising a shotcrete machine (1), a compressor unit (2), an electrical distribution box and a delivery line (3), characterized in that: The compressor unit (2) is composed of a low-pressure stage variable frequency compressor (21) and a high-pressure stage variable frequency compressor (22) in series to form a two-stage compression system, and the two are connected through a gas pressure connecting pipe (23); The nozzle (11) of the shotcreting machine (1) is internally provided with a high-precision pressure sensor (12), and the pressure sensor (12) and a controller (24) in the compressor unit (2) form a closed-loop feedback control circuit through a signal line (13). The feeding inlet of the shotcreting machine (1) is provided with a swirl premixing cavity (14) with a jacket on its inner wall, the swirl premixing cavity (14) is provided with a spiral guide vane (141) on its inner wall, and a spiral channel for material flow is formed between the swirl premixing cavity (14) and the spiral guide vane (141), and the output end of the compressor unit (2) is connected to the feeding end of the spiral channel through a first high-pressure gas pipe (15), and a second high-pressure gas pipe (17) is connected to one side of the conveying pipeline (3) close to the nozzle (11) and connected to the other output end of the compressor unit (2).

2. An ultra-high performance concrete injection apparatus according to claim 1, wherein: The nozzle (11) is integrated with an ultrasonic atomizer (111), the vibration frequency of the atomizer (111) is 20-100 kHz, and the atomizer (111) is electrically connected with a miniature electromagnetic valve (161) on an external additive pipeline (16) for adding a quick-setting agent to cooperate with the atomizer (111) to improve the adhesion of the sprayed material.

3. An ultra-high performance concrete injection apparatus according to claim 1, wherein: A heat pipe (25) is connected to the exhaust port of the compressor unit (2), the outlet end of the heat pipe (25) is connected to the inside of the jacket, and the preheating generated by the compressor unit (2) is conveyed to the material in the jacket for heating, so that the additives for concrete and the material mixed in the swirl premixing cavity (14) are more uniform.

4. The ultra-high performance concrete injection apparatus of claim 1, wherein: The shotcreting machine (1) and the compressor unit (2) are connected by quick flanges (4), the quick flanges (4) include a diesel power interface (41) or an electric power interface (42), and the two power sources are switched by a switching valve (43).

5. An ultra-high performance concrete injection apparatus according to claim 1, wherein: The controller (24) is provided with a PID algorithm module, the input end of the PID algorithm module receives real-time signals of the pressure sensor (12), and the output end of the PID algorithm module is connected to frequency converters on the low-pressure stage variable frequency compressor (21) and the high-pressure stage variable frequency compressor (22).

6. An ultra-high performance concrete injection apparatus according to claim 1, wherein: An adaptive safety relief valve (31) is mounted on the conveying pipeline (3), the safety relief valve (31) is provided with a pressure grading release module, and the trigger threshold of the pressure grading release module is dynamically adjusted according to the pressure set value output by the controller (24).

7. An ultra-high performance concrete injection apparatus according to claim 4, wherein: An Internet of Things communication module is arranged outside the shell of the shotcreting machine (1), the module is data-connected with the controller (24), and is configured to upload equipment operating parameters to a remote monitoring platform through a LoRa / WiFi protocol.

8. An ultra-high performance concrete injection apparatus according to claim 7, wherein: A transfer trolley (19) is detachably installed at the bottom of the shotcreting machine (1) and the compressor unit (2), and a feeding hopper (18) is connected to the upper end of the swirl premixing cavity (14).

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