Fiber pre-dispersing device for high-ductility sprayed concrete and working method

Abstract

The invention relates to a fiber pre-dispersing device for high-ductility sprayed concrete and a working method.The fiber pre-dispersing device for the high-ductility sprayed concrete comprises a dispersing unit, a feeding unit, a stirring unit, a putting unit and a control unit, the dispersing unit comprises a fiber dispersing barrel and an inner barrel, and the inner barrel is arranged in the fiber dispersing barrel; a feeding unit is arranged above the inner wall of the inner cylinder and is used for feeding undispersed fibers into the inner cylinder; a stirring unit is arranged in the inner cylinder and is used for uniformly dispersing fibers; a feeding unit is arranged at the bottom of the fiber dispersing barrel and is used for discharging uniformly dispersed fibers; the control unit comprises a gray level sensor, and the gray level sensor is arranged on the inner wall of the inner cylinder and used for detecting whether fibers in the inner cylinder are evenly dispersed or not. Compared with the prior art, the preparation method has the advantages that the dispersity of fibers in the concrete can be improved, and the preparation efficiency of the fiber sprayed concrete is improved.

Description

Technical Field

[0001] The invention relates to the field of shotcrete, in particular to a fiber pre-dispersion device for high-ductility shotcrete and a working method. Background Art

[0002] In the production process of high-ductility shotcrete, uniform dispersion of fibers is crucial to the performance of concrete. However, the current fiber placement process has some significant problems, mainly reflected in the need for long-term stirring after fiber placement, which not only increases production costs and time, but also easily leads to fiber agglomeration, thus affecting the uniformity of concrete performance.

[0003] The dispersion of fibers in concrete is directly related to the mechanical properties and durability of the final product. Traditional methods of placing fibers often cause the fibers to agglomerate in concrete, resulting in uneven distribution. This agglomeration phenomenon will form local stress concentration points, making the concrete prone to brittle failure under stress, reducing the tensile strength and ductility of the material. At the same time, fiber agglomeration will also affect the construction performance of concrete, increasing the difficulty and uncertainty of the work. In order to solve the problem of fiber agglomeration, the existing technology usually needs to extend the mixing time in order to achieve a more uniform dispersion effect. However, too long mixing time not only consumes energy and increases production costs, but also leads to excessive mixing of the concrete matrix, affecting its working performance and mechanical properties after hardening. Especially in large-scale production, long-term mixing is an issue that cannot be ignored for efficiency and cost control.

[0004] Currently, the existing fiber dispersion technologies on the market are mostly mechanical stirring or chemical additives, both of which have their own limitations. Mechanical stirring can easily cause mechanical damage to the fiber, while chemical additives may affect the chemical properties of concrete. Therefore, the development of a new type of fiber pre-dispersion device with higher dispersion efficiency and control accuracy can effectively improve the performance of high-ductility shotcrete and meet the industry's growing demand for high-performance materials.

[0005] In summary, to address the problem of uneven concrete performance caused by fiber agglomeration, an efficient fiber pre-dispersion device and its control system are proposed. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art and to provide a fiber pre-dispersion device and working method for high-ductility shotcrete, which can improve the dispersion of fibers in concrete and improve the preparation efficiency of fiber shotcrete.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A fiber pre-dispersing device for high-ductility shotcrete comprises a dispersing unit, a feeding unit, a stirring unit, a feeding unit and a control unit.

[0009] The dispersion unit comprises a fiber dispersion cylinder and an inner cylinder, wherein the fiber dispersion cylinder is provided with an inner cylinder;

[0010] A feeding unit is provided above the inner wall of the inner cylinder, and the feeding unit is used to feed the undispersed fibers into the inner cylinder;

[0011] A stirring unit is provided in the inner cylinder, and the stirring unit is used to disperse the fibers evenly;

[0012] A feeding unit is provided at the bottom of the fiber dispersing cylinder, and the feeding unit is used to discharge evenly dispersed fibers;

[0013] The control unit comprises a grayscale sensor, which is arranged on the inner wall of the inner cylinder and is used to detect whether the fibers in the inner cylinder are evenly dispersed.

[0014] Furthermore, the inner cylinder is a mesh inner cylinder, and the inner cylinder is coaxially connected to the fiber dispersing cylinder.

[0015] Furthermore, the feeding unit comprises a fiber storage unit, and the fiber storage unit is arranged above the inner wall of the inner tube.

[0016] As a preferred technical solution, the fiber storage unit is a common storage device in the art that can receive information from a controller, open a delivery port and deliver fiber raw materials of corresponding quality. The specific structural design of this part of the fiber storage unit does not belong to the innovative protection point of the present invention.

[0017] Furthermore, in the above, the fiber storage unit is connected to the inner cylinder through a conveying pipe.

[0018] Furthermore, the stirring unit includes a rotator and a rotating rod, the top end of the rotating rod is connected to the rotator, and the bottom end of the rotating rod extends into the bottom of the inner cylinder.

[0019] As a preferred technical solution, a gap of 2-5 cm is maintained between the rotating rod and the bottom of the inner cylinder to ensure that the fibers flow in the inner cylinder when the rotating rod rotates.

[0020] As a preferred technical solution, the rotator is an electric rotator.

[0021] As a preferred technical solution, the rotator is coaxially connected to the inner cylinder.

[0022] Furthermore, the delivery unit includes a discharge pipe, and the discharge pipe is arranged outside the bottom of the fiber dispersion cylinder.

[0023] Furthermore, the delivery unit further comprises a fiber delivery device and a second ventilation pipe, and the fiber delivery device is connected to the exhaust pipe through the second ventilation pipe.

[0024] As a preferred technical solution, the grayscale sensor is installed on the inner wall of the inner cylinder from top to bottom to comprehensively judge the dispersion of the fibers.

[0025] Furthermore, the fiber pre-dispersion device for high-ductility shotcrete also includes a ventilation unit, and the ventilation unit includes a ventilator, and the ventilator is connected to the inner cylinder.

[0026] As a preferred technical solution, the ventilator is coaxially connected to the inner cylinder.

[0027] Furthermore, the ventilator is connected to the inner cylinder through the first ventilation pipe, and uses wind force to change the flow trajectory of the fibers, thereby promoting further dispersion of the fibers.

[0028] Furthermore, the fiber storage unit is provided with a mass sensor, the rotator is provided with a speed sensor, the ventilator is provided with a wind force sensor, and the fiber dispenser is provided with a negative pressure sensor.

[0029] Furthermore, the control unit further comprises a controller,

[0030] The first signal input terminal of the controller is connected to the signal input terminal of the mass sensor, the second signal input terminal of the controller is connected to the signal input terminal of the speed sensor, the third signal input terminal of the controller is connected to the signal input terminal of the wind force sensor, the fourth signal input terminal of the controller is connected to the signal input terminal of the grayscale sensor, and the fifth signal input terminal of the controller is connected to the signal input terminal of the negative pressure sensor;

[0031] The first signal output end of the controller is connected to the signal input end of the fiber storage unit, the second signal output end of the controller is connected to the signal input end of the rotator, the third signal output end of the controller is connected to the signal input end of the ventilator, and the fourth signal output end of the controller is connected to the signal input end of the fiber dispenser.

[0032] In addition, the present invention also provides a working method of a fiber pre-dispersing device for high-ductility shotcrete, and the specific steps are as follows:

[0033] S1. When in use, the mass of the initial fiber is preset by the controller, and the controller transmits the mass information of the initial fiber to the fiber storage unit, and the fiber storage unit puts the undispersed fiber into the inner tube.

[0034] S2, the grayscale sensor collects the uniformity of fiber distribution in the inner tube in real time and transmits the information to the controller;

[0035] S3, when the grayscale sensor outputs a high level, the controller transmits instructions to control the operation of the rotator and the ventilator;

[0036] S4, when the grayscale sensor outputs a low level, the controller transmits a command to control the rotator to stop running, and at the same time, the controller transmits a command to control the fiber dispenser to run;

[0037] S5. After all the fibers in the dispersion tube and the inner tube are discharged, the controller transmits instructions to control the ventilator and the fiber dispenser to stop running.

[0038] Furthermore, in step S1, when the fiber storage unit puts undispersed fibers into the inner drum, the mass sensor weighs the mass of the undispersed fibers in the fiber storage unit and transmits the mass information of the undispersed fibers to the controller.

[0039] Furthermore, in step S2, when the grayscale sensor outputs a high level, it is defined as the fibers being unevenly dispersed in the inner cylinder.

[0040] The working principle of the present invention is as follows:

[0041] When the fiber pre-dispersion device for high-ductility shotcrete provided by the present invention is used, first, the controller presets the initial fiber mass, and the controller transmits instructions to control the fiber storage unit to put undispersed fibers into the inner cylinder. Next, the grayscale sensor collects the uniformity of fiber distribution in the inner cylinder in real time. If the grayscale sensor outputs a high level, it is defined as uneven dispersion of the fibers in the inner cylinder. The controller transmits instructions to control the operation of the rotator, and at the same time, the controller transmits instructions to control the operation of the ventilator. Until the grayscale sensor outputs a low level, the controller transmits instructions to control the rotator to stop running, or continue to put in fibers. Finally, the controller transmits instructions to control the operation of the fiber dispenser. When all the fibers in the dispersion cylinder and the inner cylinder are discharged, the controller transmits instructions to stop the operation of the ventilator and the fiber dispenser.

[0042] The grayscale sensor will output two signals, 0 and 1. When the output is 1, it is a high level, which is defined as uneven dispersion of the fibers in the inner tube. When the output is 0, it is a low level, which is defined as uniform dispersion of the fibers in the inner tube.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] 1. The fiber pre-dispersing device for high-ductility shotcrete provided by the present invention can pre-disperse the fibers before they are placed, significantly reducing the risk of fiber agglomeration, and significantly shortening the subsequent mixing time, thereby improving production efficiency. At the same time, through a precise control system, real-time monitoring and adjustment of the fiber placement amount and dispersion state can be achieved, further ensuring uniform distribution of the fibers in the concrete;

[0045] 2. The fiber pre-dispersing device for high-ductility shotcrete provided by the present invention can realize automatic monitoring and control of the dispersion of concrete composite fiber, thereby achieving the possibility of efficient fiber dispersion;

[0046] 3. The fiber pre-dispersion device for high-ductility shotcrete provided by the present invention can realize the automatic and uniform addition of composite fibers to concrete in batches, thereby improving the efficiency of fiber concrete preparation and the stability of performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic diagram of the structure of the fiber pre-dispersion device for high-ductility shotcrete in the present invention.

[0048] Explanation of the accompanying figures: 11. Fiber dispersion cylinder, 12. Inner cylinder, 21. Fiber storage unit, 22. Quality sensor, 23. Conveying pipe, 31. Rotator, 32. Speed ​​sensor, 33. Rotating rod, 41. Ventilator, 42. Wind sensor, 43. First ventilation pipe, 51. Grayscale sensor, 61. Fiber dispenser, 62. Negative pressure sensor, 63. Second ventilation pipe, 64. Exhaust pipe, 71. Controller. DETAILED DESCRIPTION

[0049] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0051] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0054] Example 1

[0055] See also Figure 1 This embodiment provides a fiber pre-dispersing device for high-ductility shotcrete, including a dispersing unit, a feeding unit, a stirring unit, a delivery unit and a control unit.

[0056] The dispersion unit comprises a fiber dispersion cylinder 11 and an inner cylinder 12, wherein the fiber dispersion cylinder 11 is provided with the inner cylinder 12;

[0057] A feeding unit is provided above the inner wall of the inner cylinder 12, and the feeding unit is used to feed the undispersed fibers into the inner cylinder 12;

[0058] The inner cylinder 12 is provided with a stirring unit, and the stirring unit is used to disperse the fibers evenly;

[0059] The bottom of the fiber dispersing cylinder 11 is provided with a dispensing unit, which is used to discharge evenly dispersed fibers;

[0060] The control unit includes a grayscale sensor 51 , which is disposed on the inner wall of the inner cylinder 12 . The grayscale sensor 51 is used to detect whether the fibers in the inner cylinder 12 are evenly dispersed.

[0061] In this embodiment, the inner cylinder 12 is a mesh inner cylinder, and the inner cylinder 12 is coaxially connected to the fiber dispersing cylinder 11 .

[0062] In this embodiment, the feeding unit includes a fiber storage unit 21 , and the fiber storage unit 21 is disposed above the inner wall of the inner tube 12 .

[0063] In this embodiment, the fiber storage unit 21 is connected to the inner cylinder 12 via a delivery pipe 23 .

[0064] In this embodiment, the stirring unit includes a rotator 31 and a rotating rod 33 . The top end of the rotating rod 33 is connected to the rotator 31 , and the bottom end of the rotating rod 33 extends into the bottom of the inner cylinder 12 .

[0065] In this embodiment, a gap of 2-5 cm is maintained between the rotating rod 33 and the bottom of the inner cylinder 12 to ensure that the fibers flow in the inner cylinder 12 when the rotating rod 33 rotates.

[0066] In this embodiment, the rotator 31 is coaxially connected to the inner cylinder 12 .

[0067] In this embodiment, the delivery unit includes a discharge pipe 64 , and the discharge pipe 64 is arranged outside the bottom of the fiber dispersing cylinder 11 .

[0068] In this embodiment, the delivery unit further includes a fiber delivery device 61 and a second ventilation pipe 63 , and the fiber delivery device 61 is connected to the exhaust pipe 64 through the second ventilation pipe 63 .

[0069] In this embodiment, the grayscale sensor 51 is installed on the inner wall of the inner cylinder 12 from top to bottom (covering all detection areas) to comprehensively judge the dispersion of the fibers.

[0070] In this embodiment, the fiber pre-dispersion device for high-ductility shotcrete further includes a ventilation unit. The ventilation unit includes a ventilator 41 . The ventilator 41 is connected to the inner tube 12 .

[0071] In this embodiment, the ventilator 41 is coaxially connected to the inner cylinder 12 .

[0072] In this embodiment, the ventilator 41 is connected to the inner cylinder 12 through the first ventilation pipe 43, and uses wind force to change the flow trajectory of the fibers, thereby promoting further dispersion of the fibers.

[0073] In this embodiment, the fiber storage unit 21 is provided with a mass sensor 22 , the rotator 31 is provided with a speed sensor 32 , the ventilator 41 is provided with a wind force sensor 42 , and the fiber dispenser 61 is provided with a negative pressure sensor 62 .

[0074] In this embodiment, the control unit further includes a controller 71,

[0075] The first signal input terminal of the controller 71 is connected to the signal input terminal of the mass sensor 22, the second signal input terminal of the controller 71 is connected to the signal input terminal of the speed sensor 32, the third signal input terminal of the controller 71 is connected to the signal input terminal of the wind force sensor 42, the fourth signal input terminal of the controller 71 is connected to the signal input terminal of the grayscale sensor 51, and the fifth signal input terminal of the controller 71 is connected to the signal input terminal of the negative pressure sensor 62;

[0076] The first signal output end of the controller 71 is connected to the signal input end of the fiber storage unit 21, the second signal output end of the controller 71 is connected to the signal input end of the rotator 31, the third signal output end of the controller 71 is connected to the signal input end of the ventilator 41, and the fourth signal output end of the controller 71 is connected to the signal input end of the fiber dispenser 61.

[0077] In addition, the present invention also provides a working method of a fiber pre-dispersing device for high-ductility shotcrete, and the specific steps are as follows:

[0078] S1. When in use, the mass of the initial fiber is preset by the controller 71, and the controller 71 transmits the mass information of the initial fiber to the fiber storage unit 21, and the fiber storage unit 21 puts the undispersed fiber into the inner tube 12.

[0079] S2, the grayscale sensor 51 collects the uniformity of fiber distribution in the inner tube 12 in real time and transmits the information to the controller 71;

[0080] S3, when the grayscale sensor 51 outputs a high level, the controller 71 transmits instructions to control the operation of the rotator 31 and the ventilator 41;

[0081] S4, when the grayscale sensor 51 outputs a low level, the controller 71 transmits a command to control the rotator 31 to stop running, and at the same time, the controller 71 transmits a command to control the fiber dispenser 61 to run;

[0082] S5. After all the fibers in the dispersion cylinder 11 and the inner cylinder 12 are discharged, the controller 71 transmits a command to control the ventilator 41 and the fiber dispenser 61 to stop running.

[0083] In this embodiment, in step S1 , when the fiber storage unit 21 puts undispersed fibers into the inner drum 12 , the mass sensor 22 weighs the mass of the undispersed fibers in the fiber storage unit 21 and transmits the mass information of the undispersed fibers to the controller 71 .

[0084] In this embodiment, in step S2 , when the grayscale sensor 51 outputs a high level, it is defined as the fibers being unevenly dispersed in the inner tube 12 .

[0085] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A fiber pre-dispersing device for high-ductility shotcrete, characterized in that: It includes a dispersing unit, a feeding unit, a stirring unit, a dosing unit and a control unit. The dispersion unit comprises a fiber dispersion cylinder (11) and an inner cylinder (12), wherein the inner cylinder (12) is arranged inside the fiber dispersion cylinder (11); A feeding unit is provided above the inner wall of the inner cylinder (12), and the feeding unit is used to feed the undispersed fibers into the inner cylinder (12); A stirring unit is provided in the inner cylinder (12), and the stirring unit is used to disperse the fibers evenly; A feeding unit is provided at the bottom of the fiber dispersing cylinder (11), and the feeding unit is used to discharge evenly dispersed fibers; The control unit comprises a grayscale sensor (51), and the grayscale sensor (51) is arranged on the inner wall of the inner cylinder (12).

2. A fiber pre-dispersion device for high-ductility shotcrete according to claim 1, characterized in that: The inner cylinder (12) is a mesh inner cylinder, and the inner cylinder (12) is coaxially connected to the fiber dispersion cylinder (11).

3. A fiber pre-dispersing device for high ductility shotcrete according to claim 1, characterized in that: The feeding unit comprises a fiber storage unit (21), and the fiber storage unit (21) is arranged above the inner wall of the inner cylinder (12).

4. A fiber pre-dispersing device for high-ductility shotcrete according to claim 3, characterized in that: The stirring unit comprises a rotator (31) and a rotating rod (33), wherein the top end of the rotating rod (33) is connected to the rotator (31), and the bottom end of the rotating rod (33) extends into the bottom of the inner cylinder (12).

5. A fiber pre-dispersing device for high-ductility shotcrete according to claim 4, characterized in that: The delivery unit comprises a discharge pipe (64), and the discharge pipe (64) is arranged outside the bottom of the fiber dispersion cylinder (11).

6. A fiber pre-dispersing device for high-ductility shotcrete according to claim 5, characterized in that: The delivery unit further comprises a fiber delivery device (61) and a second ventilation pipe (63), and the fiber delivery device (61) is connected to the exhaust pipe (64) via the second ventilation pipe (63).

7. A fiber pre-dispersing device for high-ductility shotcrete according to claim 6, characterized in that: The fiber pre-dispersion device for high-ductility shotcrete further comprises a ventilation unit, wherein the ventilation unit comprises a ventilator (41), and the ventilator (41) is connected to the inner cylinder (12).

8. A fiber pre-dispersing device for high-ductility shotcrete according to claim 7, characterized in that: The fiber storage unit (21) is provided with a mass sensor (22), the rotator (31) is provided with a speed sensor (32), the ventilator (41) is provided with a wind force sensor (42), and the fiber dispenser (61) is provided with a negative pressure sensor (62).

9. A fiber pre-dispersing device for high-ductility shotcrete according to claim 8, characterized in that: The control unit further comprises a controller (71), The first signal input end of the controller (71) is connected to the signal input end of the mass sensor (22), the second signal input end of the controller (71) is connected to the signal input end of the speed sensor (32), the third signal input end of the controller (71) is connected to the signal input end of the wind force sensor (42), the fourth signal input end of the controller (71) is connected to the signal input end of the grayscale sensor (51), and the fifth signal input end of the controller (71) is connected to the signal input end of the negative pressure sensor (62); The first signal output end of the controller (71) is connected to the signal input end of the fiber storage unit (21), the second signal output end of the controller (71) is connected to the signal input end of the rotator (31), the third signal output end of the controller (71) is connected to the signal input end of the ventilator (41), and the fourth signal output end of the controller (71) is connected to the signal input end of the fiber dispenser (61).

10. A method for operating the fiber pre-dispersing device for high-ductility shotcrete as claimed in any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1. During use, the mass of the initial fibers is preset by the controller (71), the controller (71) transmits the mass information of the initial fibers to the fiber storage unit (21), and the fiber storage unit (21) puts the undispersed fibers into the inner cylinder (12). S2. The grayscale sensor (51) collects the uniformity of the distribution of the fibers in the inner cylinder (12) in real time and transmits the information to the controller (71); S3, when the grayscale sensor (51) outputs a high level, the controller (71) transmits instructions to control the operation of the rotator (31) and the ventilator (41); S4, when the grayscale sensor (51) outputs a low level, the controller (71) transmits a command to control the rotator (31) to stop running, and at the same time, the controller (71) transmits a command to control the fiber dispenser (61) to run; S5. After all the fibers in the dispersion tube (11) and the inner tube (12) are discharged, the controller (71) transmits a command to control the ventilator (41) and the fiber dispenser (61) to stop operating.

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