Method for positioning magnetic fibers for magnetic fiber reinforced concrete

Abstract

This invention provides a method for positioning magnetic fibers in magnetic fiber concrete. The method uses a magnetic fiber positioning system and includes the following steps: Step 1: Constructing a fiber injection device and preparing magnetic fibers of suitable shape and size as needed; Step 2: Placing the processed magnetic fibers on a vibration platform, starting the vibration motor, and allowing the magnetic fibers to fall from the fiber discharge hole. The fibers then fall through a guide pipe into a funnel, and are subsequently conveyed through a limiting funnel to a conveying limiting pipe; Step 3: Adjusting the nozzle's spray direction, starting the air pump, and completing the magnetic fiber injection. This method enables directional injection of magnetic fibers, which is beneficial for solving the problem of positioning magnetic fibers in concrete.

Description

Technical Field

[0001] This invention relates to the field of concrete pouring, and in particular to a magnetic fiber positioning method for magnetic fiber concrete. Background Technology

[0002] With the rapid development of urban construction and transportation, new types of concrete are emerging rapidly, among which magnetic fiber concrete and steel fiber concrete have the best application effects and the widest range. However, problems have also arisen. During construction, it is difficult to accurately position the magnetic or steel fibers in magnetic fiber concrete and steel fiber concrete, resulting in uneven fiber distribution, uneven stress distribution within the concrete, and reduced compressive strength. While increasing the amount of fiber used can improve compressive strength, it undoubtedly leads to significant waste. Magnetic field positioning is a common method for positioning magnetic and steel fibers. For example, CN109719851B discloses a 3D printing electromagnetic wave-absorbing concrete directional fiber graded feeding system, which requires electromagnetic adsorption for fiber distribution. However, this method is difficult to accurately position during large-scale construction and can only provide rough positioning. CN114174029A discloses a method and apparatus for manufacturing anisotropic fiber concrete, which requires simultaneously spraying or extruding the fibers and concrete to control fiber arrangement, but the operation is not flexible enough. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a magnetic fiber positioning method for magnetic fiber concrete, which can realize the directional injection of magnetic fibers and help solve the positioning problem of magnetic fibers in concrete.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a magnetic fiber injection device, including a conveying and limiting tube, the tube wall of which is provided with a fiber inlet, the fiber inlet being connected to the discharge port at the lower end of the limiting funnel, one end of the conveying and limiting tube being connected to an air pressure pump through a connecting pipe, and the other end being provided with a nozzle.

[0005] In a preferred embodiment, the conveying limiting tube includes a support rod and a conveying pipe disposed on the outside of the support rod. The support rod is provided with a conveying groove, and the fiber inlet is disposed on the pipe wall of the conveying pipe and communicates with the conveying groove.

[0006] In a preferred embodiment, a vibration platform is included, a vibration motor is provided at the bottom of the vibration platform, a number of fiber leakage holes are provided on the vibration platform, a guide pipe corresponding to the fiber leakage holes is provided at the bottom of the vibration platform, a funnel is provided at the bottom of the vibration platform, the guide pipe is placed inside the funnel, the lower outlet of the funnel is connected to a limiting funnel, and the length direction of the discharge end of the guide pipe is consistent with the length direction of the limiting funnel.

[0007] In a preferred embodiment, the end of the delivery limiting tube away from the connecting tube is provided with a T-shaped connector, the nozzle is connected to one port of the T-shaped connector through a pipe, and the other port is connected to the second air pressure pump through a pipe.

[0008] In a preferred embodiment, the limiting funnel includes a funnel cavity, and a partition is provided inside the funnel cavity to divide the funnel cavity into several conveying cavities, with the discharge port at the lower end of the conveying cavity connected to the fiber inlet.

[0009] The present invention also provides a magnetic fiber positioning system, including a magnetic fiber injection device and a magnetic fiber filling skeleton. The magnetic fiber filling skeleton includes a plurality of interconnected pipes, including horizontal pipes, vertical pipes and longitudinal pipes. The horizontal pipes, vertical pipes and longitudinal pipes are interconnected by adapters to form a pipe cage. The horizontal pipes, vertical pipes and longitudinal pipes are filled with magnetic fibers.

[0010] The present invention also provides a magnetic fiber positioning method, comprising the following steps:

[0011] Step 1: Complete the construction of the fiber injection device and prepare magnetic fibers of appropriate shape and size as needed;

[0012] Step 2: Place the processed magnetic fiber on the vibration platform, start the vibration motor, and the magnetic fiber falls from the fiber discharge hole. The magnetic fiber falls into the funnel through the guide tube, and then is conveyed to the conveying limit tube through the limiting funnel.

[0013] Step 3: Adjust the nozzle's spray direction, start the air pump, and complete the magnetic fiber injection.

[0014] In the preferred embodiment, in step three, magnetic fibers are directly injected into the poured concrete.

[0015] In the preferred embodiment, in step three, the nozzle is inserted into a section of the pipe of the magnetic fiber filling skeleton, one end of the pipe is sealed, and the other end is injected with magnetic fiber. After the injection is completed, the adjacent pipes are connected through an adapter, and then the magnetic fiber is injected into the adjacent pipes until the construction of the magnetic fiber filling skeleton is completed. The two ports of the magnetic fiber filling skeleton are not closed.

[0016] In the preferred embodiment, step four is also included: after completing the magnetic fiber filled skeleton, water or wax is injected from one of the ports of the magnetic fiber filled skeleton, then the reserved port is closed, the magnetic fiber filled skeleton is placed in a low temperature environment to allow the water or wax to solidify, then the pipes of the magnetic fiber filled skeleton are removed, and the magnetic fiber skeleton formed by the magnetic fiber and water or wax is placed in a mold for concrete pouring.

[0017] This invention provides a magnetic fiber injection device, magnetic fiber positioning system, and positioning method, which can arrange magnetic fibers in a certain direction and inject them into concrete along that direction, allowing the magnetic fibers to be oriented and positioned within the concrete. By setting up a magnetic fiber filling skeleton to fix the magnetic fibers, the magnetic fibers can be arranged in a certain shape, achieving the arrangement of magnetic fibers along a preset complex path. In construction, magnetic fibers or steel fibers can be distributed to replace part of the reinforcing steel, saving costs. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic diagram of the injection device of the present invention;

[0020] Figure 2 This is a schematic diagram of the limiting funnel structure;

[0021] Figure 3 This is a schematic diagram of nozzle installation;

[0022] Figure 4 This is a schematic diagram of the preferred nozzle installation.

[0023] Figure 5 This is a schematic diagram of the cross-section of the conveying limiting tube;

[0024] Figure 6 A schematic diagram of a magnetic fiber-filled skeleton;

[0025] In the diagram: 1. Conveying limiting pipe; 2. Limiting funnel; 3. Air pressure pump; 4. Nozzle; 5. Vibrating platform; 6. Vibrating motor; 7. Guide pipe; 8. Funnel; 9. T-joint; 10. Second air pressure pump; 11. Magnetic fiber filling skeleton; 101. Fiber inlet; 102. Support rod; 103. Conveying pipe; 104. Conveying trough; 201. Discharge port; 202. Funnel cavity; 203. Partition plate; 204. Conveying cavity; 501. Fiber leakage hole; 1101. Horizontal pipe; 1102. Vertical pipe; 1103. Detailed Implementation

[0026] Example 1: As Figures 1-3 As shown, a magnetic fiber injection device includes a conveying and limiting tube 1. The tube wall of the conveying and limiting tube 1 is provided with a fiber inlet 101. The fiber inlet 101 is connected to the discharge port 201 at the lower end of the limiting funnel 2. The discharge port 201 is limited to outputting a single magnetic fiber. One end of the conveying and limiting tube 1 is connected to a pneumatic pump 3 through a connecting pipe, and the other end is provided with a nozzle 4.

[0027] In practical applications, magnetic fibers can be selected in corrugated, cylindrical, or crescent shapes, depending on the specific application. The aspect ratio of the magnetic fibers is 30 to 100 times, and the material can be iron-based alloy, nickel-based alloy, or cobalt-based alloy. Magnetic fibers with different physical properties can be made using different methods. Selecting different magnetic fibers in appropriate situations can achieve the best results.

[0028] Nozzle 4 is made of zinc alloy. Nozzle 4 is designed to be 8cm-15cm long and has a conical tip. The size of the conical tip is slightly larger than the width of the magnetic fiber.

[0029] Preferred, such as Figure 2 As shown, the limiting funnel 2 includes a funnel cavity 202, and a partition 203 is provided in the funnel cavity 202 to divide the funnel cavity 202 into several conveying cavities 204. The discharge port 201 at the lower end of the conveying cavity 204 is connected to the fiber inlet 101.

[0030] By setting multiple conveying chambers 204, multiple sets of conveying limit tubes 1 can be conveyed with magnetic fibers simultaneously.

[0031] Preferred, such as Figure 5 As shown, the conveying limiting tube 1 includes a support rod 102 and a conveying pipe 103 disposed outside the support rod 102. The support rod 102 is provided with a conveying groove 104, and the fiber inlet 101 is disposed on the pipe wall of the conveying pipe 103 and communicates with the conveying groove 104.

[0032] The length of the conveying limiting tube 1 is 100cm-150cm, the diameter of the support rod 102 is 2cm, and the inner diameter of the conveying tube 103 is slightly larger than that of the support rod 102, allowing the support rod 102 to pass through the conveying tube 103. The width of the conveying trough 104 is slightly larger than the width of the magnetic fiber. The length of the fiber inlet 101 is the same as the length of the magnetic fiber, and its width is slightly larger than that of the magnetic fiber, so that the length direction of the magnetic fiber is consistent with the length direction of the conveying limiting tube 1. After aligning and connecting the discharge port 201 at the lower end of the limiting funnel 2 with the fiber inlet 101, it is sealed with silicone.

[0033] like Figure 2 As shown, multiple discharge ports 201 can be configured, thereby allowing multiple sets of conveying limit tubes 1 to be connected to the discharge ports 201, enabling simultaneous injection of multiple sets of magnetic fibers at one time.

[0034] Preferably, the system also includes a vibration platform 5, with a vibration motor 6 at the bottom. The vibration platform 5 has several fiber leakage holes 501, the size and shape of which are consistent with the magnetic fiber. The bottom of the vibration platform 5 has a guide pipe 7 corresponding to the fiber leakage holes 501. The bottom of the vibration platform 5 has a funnel 8, the upper part of which is connected to the vibration platform 5, and the lower part of which is connected to the upper end of the limiting funnel 2. The guide pipe 7 is placed inside the funnel 8, and the lower outlet of the funnel 8 is connected to the limiting funnel 2. The length direction of the discharge end of the guide pipe 7 is consistent with the length direction of the limiting funnel 2. The guide pipe 7 guides the magnetic fiber and ensures that the magnetic fiber can maintain its direction during the falling process, so that when the magnetic fiber is discharged from the discharge port 201, it is consistent with the length direction of the conveying limiting pipe 1.

[0035] Preferred, such as Figure 4 As shown, the end of the conveying limiting pipe 1 away from the connecting pipe is provided with a T-shaped connector 9. The nozzle 4 is connected to one port of the T-shaped connector 9 through a pipe, and the other port is connected to the second air pressure pump 10 through a pipe.

[0036] By setting up air pressure pump 3 and second air pressure pump 10, the magnetic fiber can be conveyed along the length of the conveying limit tube 1 and moved to the position of T-joint 9. Under the action of the second air pressure pump 10, the magnetic fiber moves along the T-joint 9, thereby realizing the change of the angle of the magnetic fiber.

[0037] A method of using a magnetic fiber injection device includes the following steps:

[0038] Step 1: Complete the construction of the fiber injection device and prepare magnetic fibers of appropriate shape and size as needed.

[0039] Step 2: Place the processed magnetic fiber on the vibration platform 5, start the vibration motor 6, and the magnetic fiber falls from the fiber discharge hole 501. The magnetic fiber falls into the funnel 8 through the guide pipe 7, and then is conveyed to the conveying limit pipe 1 through the limiting funnel 2.

[0040] Step 3: Adjust the spray direction of nozzle 4, start the air pump 3, and complete the magnetic fiber injection, directly injecting the magnetic fiber into the poured concrete.

[0041] Example 2: Different from Example 1, such as Figure 6As shown, a magnetic fiber positioning system further includes a magnetic fiber filling skeleton 11. The magnetic fiber filling skeleton 11 includes several interconnected pipes, and the pipes of the magnetic fiber filling skeleton 11 are PPR pipes. The pipes include a horizontal pipe 1101, a vertical pipe 1102, and a longitudinal pipe 1103. The horizontal pipe 1101, the vertical pipe 1102, and the longitudinal pipe 1103 are interconnected through adapters to form a pipe cage. In specific use, the pipe cage can be set as a columnar cage or a mesh cage, etc., and the shape of the pipe cage is set according to the specific application.

[0042] The adapter can be a T-type connector, an L-type connector, or a cross-type connector. The horizontal pipe 1101, the vertical pipe 1102, and the longitudinal pipe 1103 are filled with magnetic fibers.

[0043] A positioning method for a magnetic fiber positioning system includes the following steps:

[0044] Step 1: Complete the construction of the fiber injection device and prepare magnetic fibers of appropriate shape and size as needed.

[0045] Step 2: Place the processed magnetic fiber on the vibration platform 5, start the vibration motor 6, and the magnetic fiber falls from the fiber discharge hole 501. The magnetic fiber falls into the funnel 8 through the guide pipe 7, and then is conveyed to the conveying limit pipe 1 through the limiting funnel 2.

[0046] Step 3: Adjust the spray direction of nozzle 4, start the air pressure pump 3, and complete the magnetic fiber injection. Insert nozzle 4 into a section of the pipe of magnetic fiber filling skeleton 11. Seal one end of the pipe and inject magnetic fiber at the other end. After the injection is completed, connect the adjacent pipes through the adapter, and then inject magnetic fiber into the adjacent pipes until the construction of magnetic fiber filling skeleton 11 is completed. The two ports at the end of magnetic fiber filling skeleton 11 that need to be connected are not closed.

[0047] Step 4: After completing the magnetic fiber filling skeleton 11, inject water or wax into one of its ports, then seal the reserved port. Place the magnetic fiber filling skeleton 11 in a low-temperature environment to allow the water or wax to solidify. Then, dismantle the pipes of the magnetic fiber filling skeleton 11. Specifically, the pipes can be cut to remove them. Alternatively, the pipes of the magnetic fiber filling skeleton 11 can be designed as two half-pipes, tightly connected by clamps, which facilitates pipe removal. After pipe removal, place the magnetic fiber skeleton formed by the magnetic fibers and water or wax into a mold for concrete pouring. During concrete pouring, at a certain temperature, the ice or wax melts, exposing the magnetic fibers in the concrete for precise positioning. Then, cure the concrete structure.

Claims

1. A method for positioning magnetic fibers in magnetic fiber concrete, characterized in that, The magnetic fiber positioning system is used for magnetic fiber positioning. The magnetic fiber positioning system includes a magnetic fiber injection device, which includes a conveying and limiting tube (1). The wall of the conveying and limiting tube (1) is provided with a fiber inlet (101). The fiber inlet (101) is connected to the discharge port (201) at the lower end of the limiting funnel (2). One end of the conveying and limiting tube (1) is connected to the air pressure pump (3) through a connecting pipe, and the other end is provided with a nozzle (4). The system also includes a vibration platform (5). The bottom of the vibration platform (5) is provided with a vibration motor (6). The vibration platform (5) is provided with several fiber leakage holes (501). The bottom of the vibration platform (5) is provided with a guide pipe (7) corresponding to the fiber leakage holes (501). The bottom of the vibration platform (5) is provided with a funnel (8). The guide pipe (7) is set inside the funnel (8). The lower end outlet of the funnel (8) is connected to the limiting funnel (2). The length direction of the discharge end of the guide pipe (7) is consistent with the length direction of the limiting funnel (2). The magnetic fiber positioning system also includes a magnetic fiber filling skeleton (11), which includes several interconnected pipes, including a horizontal pipe (1101), a vertical pipe (1102) and a longitudinal pipe (1103). The horizontal pipe (1101), the vertical pipe (1102) and the longitudinal pipe (1103) are interconnected by adapters to form a pipe cage. The horizontal pipe (1101), the vertical pipe (1102) and the longitudinal pipe (1103) are filled with magnetic fibers. Includes the following steps: Step 1: Complete the construction of the fiber injection device and prepare magnetic fibers of appropriate shape and size as needed; Step 2: Place the processed magnetic fiber on the vibration platform (5), start the vibration motor (6), and the magnetic fiber falls from the fiber discharge hole (501). The magnetic fiber falls into the funnel (8) through the guide pipe (7), and then is transported to the conveying limit pipe (1) through the limiting funnel (2). Step 3: Adjust the spray direction of the nozzle (4), start the air pressure pump (3), insert the nozzle (4) into one section of the pipe of the magnetic fiber filling skeleton (11), seal one end of the pipe, and inject magnetic fiber at the other end. After the injection is completed, connect the adjacent pipes through the adapter, and then inject magnetic fiber into the adjacent pipes until the construction of the magnetic fiber filling skeleton (11) is completed. The two ports of the magnetic fiber filling skeleton (11) are not closed. Step 4: After completing the magnetic fiber filling skeleton (11), inject water or wax into one of the ports of the magnetic fiber filling skeleton (11), then close the reserved port, place the magnetic fiber filling skeleton (11) in a low temperature environment to allow the water or wax to solidify, then remove the pipes of the magnetic fiber filling skeleton (11), and place the magnetic fiber skeleton formed by the magnetic fiber and water or wax in a mold for concrete pouring.

2. The magnetic fiber positioning method for magnetic fiber concrete according to claim 1, characterized in that: The conveying limiting tube (1) includes a support rod (102) and a conveying pipe (103) disposed outside the support rod (102). The support rod (102) is provided with a conveying groove (104). The fiber inlet (101) is disposed on the pipe wall of the conveying pipe (103) and communicates with the conveying groove (104).

3. The magnetic fiber positioning method for magnetic fiber concrete according to claim 1, characterized in that: The delivery limiting tube (1) is provided with a T-shaped connector (9) at one end away from the connecting tube. The nozzle (4) is connected to one port of the T-shaped connector (9) through a pipe, and the other port is connected to the second air pressure pump (10) through a pipe.

4. The magnetic fiber positioning method for magnetic fiber concrete according to claim 1, characterized in that: The limiting funnel (2) includes a funnel cavity (202), and a partition (203) is provided in the funnel cavity (202) to divide the funnel cavity (202) into several conveying cavities (204). The discharge port (201) at the lower end of the conveying cavity (204) is connected to the fiber inlet (101).

5. The magnetic fiber positioning method for magnetic fiber concrete according to claim 1, characterized in that, In step three, the magnetic fibers are directly injected into the poured concrete.

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