STC pouring machine

Abstract

The invention discloses an STC pouring machine, and belongs to the technical field of concrete pouring, the STC pouring machine comprises a belt conveying mechanism and bristles, the belt conveying mechanism comprises an upper belt and a lower belt, and an STC conveying channel is formed between the upper belt and the lower belt; the bristles are distributed on the surface of the upper belt and / or the surface of the lower belt in a high-low staggered mode. The STC is driven to be conveyed in the conveying channel through operation of the upper belt and the lower belt, the orientation of steel fibers in the STC in the conveying channel is improved under the action of the bristles, the effective utilization rate of the steel fibers is increased, and the mechanical property of the STC is improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete pouring, in particular to an STC pouring machine. Background Art

[0002] In the field of construction, especially bridge construction, the research and application of composite bridge deck structures on steel bridges have attracted increasing attention. However, in practical applications, the reduction of concrete tensile strength often leads to cracking of the rigid base, which seriously affects the durability and service life of the bridge.

[0003] In response to the problem of fatigue cracking of steel bridge decks, domestic and foreign scholars have conducted a lot of research and proposed a variety of methods to extend the service life of composite bridge deck systems. Among them, the steel-super toughness concrete (STC) lightweight composite bridge deck structure, as an innovative solution, has shown broad application prospects in the field of steel bridges with its excellent properties such as high bending strength, high toughness, and high durability.

[0004] The STC structural layer is a special cement-based composite material formed by a variety of raw materials, including cement, silica fume, fly ash, quartz sand, quartz powder, steel fiber, water reducer, etc., after solidification and hardening. It not only has the ultra-high compressive strength and strong tensile strength of Ultra-High Performance Concrete (UHPC), but also has ultra-high deformation resistance, which can well adapt to the situation of large local deformation of steel decks on steel beam bridge decks. Therefore, STC materials are specially developed for the laying of steel beam bridge decks.

[0005] However, in the STC structure, the stress state of the steel fiber plays a vital role in improving its mechanical properties. Studies known to the inventors show that the steel fibers are usually randomly distributed inside the STC, which results in only a part of the steel fibers being able to effectively resist the external load. Assuming that the steel fibers are equally distributed in all directions in the matrix, the orientation coefficient of the three-dimensional randomly distributed steel fibers along a specific direction is usually no more than 0.5, which means that most of the steel fibers do not fully exert their toughening effect.

[0006] As far as the inventors know, the fiber orientation can be improved by using methods such as magnetic field orientation to align steel fibers, but the processes for improving fiber orientation are not yet mature, or are time-consuming and labor-intensive and consume a lot of labor costs.

[0007] Therefore, developing a casting process that can efficiently and accurately control the orientation of steel fibers inside STC is of great significance for improving the mechanical properties of STC structures and extending the service life of bridges. Summary of the invention

[0008] The purpose of the present invention is to provide an STC casting machine to solve the problems existing in the above-mentioned prior art. The operation of the upper belt and the lower belt is used to drive the STC to be transported in the conveying channel. Under the action of the bristles, the orientation of the steel fibers in the STC in the conveying channel is improved, the effective utilization rate of the steel fibers is increased, and the mechanical properties of the STC are improved.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] The present invention provides an STC casting machine, comprising a belt conveying mechanism and bristles, wherein the belt conveying mechanism comprises an upper belt and a lower belt, wherein a conveying channel for STC is formed between the upper belt and the lower belt; and the bristles are distributed on the surface of the upper belt and / or the lower belt in a staggered manner.

[0011] In one embodiment, the lower belt moves from the inlet to the outlet of the conveying channel, and the upper belt moves from the outlet to the inlet of the conveying channel.

[0012] In one embodiment, a brush is further included, wherein the brush includes an arc-shaped base and bristles disposed on the base, the bristles have the same length, the tips of the bristles are located at different heights, and the base is staggeredly distributed on the surface of the upper belt.

[0013] In one embodiment, the upper belt includes a first upper belt and a second upper belt, the first upper belt and the second upper belt form a first angle, the lower belt includes a first lower belt and a second lower belt, the first lower belt and the second lower belt form a second angle, the first angle is equal to the second angle, and the conveying channel is an open V-shaped structure.

[0014] In one embodiment, the first upper belt and the first lower belt are arranged obliquely, the second upper belt and the second lower belt are arranged horizontally, and the first angle and the second angle are obtuse angles.

[0015] In one embodiment, the first upper belt is connected to a first drive, the first drive is connected to a first speed regulator, the second upper belt is connected to a second drive, the second drive is connected to a second speed regulator, the first lower belt is connected to a third drive, the third drive is connected to a third speed regulator, the second lower belt is connected to a fourth drive, and the fourth drive is connected to a fourth speed regulator.

[0016] In one embodiment, it further comprises a track wheel, wherein the track wheel has a wheel surface groove, wherein the wheel surface groove is used to be clamped on the steel bar, and the track wheel can run using the steel bar as a track.

[0017] In one embodiment, it further comprises a frame, the belt conveying mechanism is supported on the frame, the frame is connected to a handle, and the handle is located on a side close to the entrance of the conveying channel.

[0018] In one embodiment, a feeding structure is further included, and the feeding structure is detachably connected to the inlet of the conveying channel. The top end of the feeding structure is a round mouth shape, and the bottom end of the feeding structure is a flat mouth shape that imitates the conveying channel.

[0019] In one embodiment, it further comprises a shell, wherein the shell is wrapped around the outside of the belt conveying mechanism.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] The present invention forms a conveying channel between the upper belt and the lower belt, and utilizes the operation of the upper belt and the lower belt to drive STC to be conveyed in the conveying channel. Under the action of the bristles, the orientation of steel fibers in the STC in the conveying channel can be improved, the effective utilization rate of the steel fibers is increased, and the mechanical properties of the STC are improved.

[0022] The present invention moves the upper belt and the lower belt in a certain direction, driving the brush bristles to move in a certain direction, so that the steel fibers are distributed in the STC in a forward direction. The number of steel fibers bridging the crack interface in the forward steel fiber concrete is greater, and the matrix is ​​not easily peeled off when the fibers are pulled out, thereby enhancing the effective bonding length between the fibers and the matrix, making the reinforcement effect of the directional steel fibers more significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of an STC casting machine in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of a speed regulator in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of a bristle arrangement in one embodiment of the present invention;

[0027] Figure 4 A schematic diagram of another type of bristle arrangement in an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of a rail wheel in an embodiment of the present invention;

[0029] Among them, 11, the first upper belt; 111, the first driver; 112, the first speed regulator; 12, the second upper belt; 121, the second driver; 122, the second speed regulator; 13, the first lower belt; 131, the third driver; 132, the third speed regulator; 14, the second lower belt; 141, the fourth driver; 142, the fourth speed regulator; 2, the bristles; 3, the track wheel; 31, the wheel surface groove; 4, the frame; 5, the handle; 6, the feeding structure; 7, the shell; 8, the brush. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide an STC casting machine to solve the problems existing in the prior art. The operation of the upper belt and the lower belt is utilized to drive the STC to be transported in the conveying channel. Under the action of the bristles, the orientation of the steel fibers in the STC in the conveying channel is improved, the effective utilization rate of the steel fibers is increased, and the mechanical properties of the STC are improved.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 to Figure 5As shown, the present invention provides an STC pouring machine, including a belt conveying mechanism and bristles 2, the belt conveying mechanism includes an upper belt and a lower belt, the upper belt can be set in sections or a whole belt, and similarly, the lower belt can be set in sections or a whole belt. The upper belt and the lower belt are respectively connected with independent driving structures to be able to control parameters such as the moving direction and the moving speed. A conveying channel for STC is formed between the upper belt and the lower belt, and the STC enters the conveying channel from the inlet of the conveying channel, and flows out from the outlet of the conveying channel after moving in the conveying channel. The conveying channel can be in a horizontal state, an inclined state or have a certain bending angle, and can directly transport the STC on the STC transport vehicle to the pouring site, thereby improving the convenience of construction. The bristles 2 are distributed on the surface of the upper belt or the surface of the lower belt or on the surfaces of the upper belt and the lower belt at the same time in a staggered manner. When distributing the bristles 2, they can be laid on the entire surface or partially. In addition, the high and low staggered distribution mentioned here should be understood as the tips of different bristles 2 are not in the same plane, and the tips of different bristles 2 can reach any depth range of STC. The bristles 2 set on the upper belt or the lower belt have different tip positions in the width direction and the length direction of the belt. Therefore, during the operation of the belt conveyor mechanism, the steel fiber can be improved within the different thickness ranges of STC. The bristles 2 with medium hardness can improve the scattered steel fibers, reduce the angle between the steel fibers and the tensile direction of the concrete, improve the utilization rate of the steel fibers, and improve the tensile strength of STC. It should be noted that: in order to enable the bristles 2 to brush the STC in the conveying channel, the moving speed and direction of the upper belt and the lower belt need to be set; for example, the upper belt and the lower belt are both running clockwise / counterclockwise (and can transport STC toward the outlet direction), but there is a speed difference between the two; or the upper belt and the lower belt run clockwise and counterclockwise respectively (and can transport STC toward the outlet direction).

[0034] The present invention forms a conveying channel between the upper belt and the lower belt, and utilizes the operation of the upper belt and the lower belt to drive the STC to be conveyed in the conveying channel. Under the action of the bristles 2, the orientation of the steel fibers in the STC in the conveying channel can be improved, and the problem of scattered distribution and low effective utilization rate of the steel fibers in the STC can be solved, thereby improving the tensile strength of the STC, effectively controlling costs and saving manpower.

[0035] In one embodiment, the lower belt moves from the inlet to the outlet of the conveying channel, and the upper belt moves from the outlet to the inlet of the conveying channel. At this time, the running directions of the upper belt and the lower belt are opposite, and the bristles 2 can be set only on the upper belt. The lower belt mainly plays a conveying function and can carry the STC to move, while the upper belt mainly plays a brushing function to improve the orientation of steel fibers in the STC.

[0036] In one embodiment, the height of the conveying channel is set as small as possible to form a thin layer of STC, ensuring that the effective utilization rate of the steel fiber is improved as much as possible. In addition, by forming a thin layer of STC, a thin layer tamping process can be used, thereby significantly improving the tensile strength of STC.

[0037] In one embodiment, in combination Figure 3 As shown, it also includes a brush 8, which includes an arc-shaped base and bristles 2 arranged on the base. The bristles 2 have the same length. Since the bristles 2 are distributed at different positions on the surface of the brush 8, the tips of the bristles 2 are located at different heights, and the bases are staggered on the surface of the upper belt. When the STC moves in the conveying channel, the bristles 2 can be embedded in the STC at different depths, thereby effectively improving the steel fibers of the entire layer of the STC.

[0038] In one embodiment, the upper belt is divided into two parts, and the upper belt includes a first upper belt 11 and a second upper belt 12, and the ends are as close as possible to avoid the STC being squeezed out of the gap between the first upper belt 11 and the second upper belt 12, and the first upper belt 11 and the second upper belt 12 are at a first angle, and the setting of the first angle can make the STC move along the set path in the conveying channel. The lower belt is divided into two parts, and the lower belt includes a first lower belt 13 and a second lower belt 14, and the ends are as close as possible to avoid the STC being squeezed out of the gap between the first lower belt 13 and the second lower belt 14, and the first lower belt 13 and the second lower belt 14 are at a second angle, and the setting of the second angle can make the STC move along the set path in the conveying channel. The first angle can be equal to the second angle, and at this time, a thin layer of STC with uniform thickness can be formed in the conveying channel, which is beneficial to the improvement of steel fiber. The conveying channel is an open V-shaped structure, which is convenient for the STC to be transported from high to low in the conveying channel, and then it is convenient to connect the STC conveying vehicle.

[0039] In one embodiment, the first upper belt 11 and the first lower belt 13 are arranged obliquely, and the second upper belt 12 and the second lower belt 14 are arranged horizontally. At this time, the first angle and the second angle are obtuse angles, the top ends of the first upper belt 11 and the first lower belt 13 are the entrances of the conveying channel, and the ends of the second upper belt 12 and the second lower belt 14 are the exits of the conveying channel. STC passes through the inclined conveying channel from the entrance in the conveying channel and then enters the horizontal conveying channel, and is finally discharged from the exit. The horizontal conveying channel enables STC to move evenly and be squeezed up and down by the second upper belt 12 and the second lower belt 14 to form an STC thin layer with uniform thickness.

[0040] In one embodiment, the first upper belt 11 is connected to a first driver 111, which may be a motor for driving the first upper belt 11 to run, and the first driver 111 is connected to a first speed regulator 112, which may adjust the driving speed of the first driver 111, thereby adjusting the running speed of the first upper belt 11. The second upper belt 12 is connected to a second driver 121, which may be a motor for driving the second upper belt 12 to run, and the second driver 121 is connected to a second speed regulator 122, which may adjust the driving speed of the second driver 121, thereby adjusting the running speed of the second upper belt 12. The first lower belt 13 is connected to a third driver 131, which may be a motor for driving the first lower belt 13 to run, and the third driver 131 is connected to a third speed regulator 132, which may adjust the driving speed of the third driver 131, thereby adjusting the running speed of the first lower belt 13. The second lower belt 14 is connected to a fourth driver 141, which can be a motor for driving the second lower belt 14 to run, and the fourth driver 141 is connected to a fourth speed regulator 142, which can adjust the driving speed of the fourth driver 141, thereby adjusting the running speed of the second lower belt 14. By controlling the running speed of each belt, the discharge amount of STC can be adjusted, and at the same time, the improvement effect of steel fiber can also be adjusted.

[0041] In one embodiment, it also includes a track wheel 3, which has a wheel surface groove 31. The wheel surface groove 31 is used to be clamped on the steel bar, so that the track wheel 3 can move along the steel bar as a track. When the casting site is steel bars, the track wheel 3 can move along the steel bars, which is convenient for operation, convenient for the STC casting machine to move, and convenient for casting operation.

[0042] In one embodiment, it also includes a frame 4, the belt conveying mechanism is supported on the frame 4, and the frame 4 supports each driver and components such as a transmission shaft connected to the driver, so that each belt can operate normally. The frame 4 is connected to a handle 5, and the handle 5 is located on a side close to the entrance of the conveying channel, which is convenient for workers to operate and move the STC pouring machine. The STC pouring machine of the present invention is easy to operate and can be operated by a single person, which can greatly reduce the labor cost.

[0043] In one embodiment, it also includes a feeding structure 6, which is detachably connected to the inlet of the conveying channel. The top of the feeding structure 6 is a round mouth shape, which is convenient for connecting to the STC conveying vehicle. The bottom of the feeding structure 6 is a flat mouth shape that imitates the conveying channel, which is convenient for the STC to enter the conveying channel to improve the steel fiber.

[0044] In one embodiment, it also includes a shell 7, which is wrapped around the outside of the belt conveyor mechanism to protect the belt conveyor mechanism on the one hand and to prevent personal injury caused by contact with people on the other hand.

[0045] In one embodiment, the working process of the present invention is as follows: first, install an adaptive feed structure 6 on the STC discharge port (for example, the discharge port of the STC conveyor vehicle), ensure that after the feed structure 6 is installed, adjust the position of the track wheel 3 so that the STC casting machine moves forward on the steel bars. After starting the STC casting machine, the first driver 111, the second driver 121, the third driver 131 and the fourth driver 141 start to run; STC flows downward from the feed structure 6, along the inclined conveying channel formed by the first upper belt 11 and the first lower belt 13, into the horizontal conveying channel formed by the second upper belt 12 and the second lower belt 14. The first upper belt 11 and the second upper belt 12 move counterclockwise, so that the bristles 2 move in the opposite direction of the STC conveying direction, and the bristles 2 are used to improve the forward direction of the steel fibers; the first lower belt 13 and the second lower belt 14 move counterclockwise, so that the STC flows toward the outlet direction. The height of the conveying channel is set relatively small to form a thin layer of STC. The running speed of the belt conveying mechanism is adjusted by adjusting the first speed regulator 112, the second speed regulator 122, the third speed regulator 132 and the fourth speed regulator 142, thereby controlling the amount of STC casting material.

[0046] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An STC casting machine, characterized in that: include: A belt conveyor mechanism, wherein the belt conveyor mechanism comprises an upper belt and a lower belt, wherein a conveying channel of the STC is formed between the upper belt and the lower belt; And bristles, the bristles are distributed in a staggered manner on the surface of the upper belt and / or the lower belt.

2. The STC casting machine according to claim 1, characterized in that: The lower belt moves from the inlet to the outlet of the conveying channel, and the upper belt moves from the outlet to the inlet of the conveying channel.

3. The STC casting machine according to claim 1, characterized in that: It also includes a brush, which includes an arc-shaped base and bristles arranged on the base, the bristles have the same length, the tips of the bristles are located at different heights, and the base is staggeredly distributed on the surface of the upper belt.

4. The STC casting machine according to claim 1, characterized in that: The upper belt includes a first upper belt and a second upper belt, the first upper belt and the second upper belt form a first angle, the lower belt includes a first lower belt and a second lower belt, the first lower belt and the second lower belt form a second angle, the first angle is equal to the second angle, and the conveying channel is an open V-shaped structure.

5. The STC casting machine according to claim 4, characterized in that: The first upper belt and the first lower belt are arranged obliquely, the second upper belt and the second lower belt are arranged horizontally, and the first angle and the second angle are obtuse angles.

6. The STC casting machine according to claim 4, characterized in that: The first upper belt is connected to a first drive, the first drive is connected to a first speed regulator, the second upper belt is connected to a second drive, the second drive is connected to a second speed regulator, the first lower belt is connected to a third drive, the third drive is connected to a third speed regulator, the second lower belt is connected to a fourth drive, and the fourth drive is connected to a fourth speed regulator.

7. The STC casting machine according to claim 1, characterized in that: It also includes a track wheel, which has a wheel surface groove. The wheel surface groove is used to be clamped on the steel bar, and the track wheel can run with the steel bar as a track.

8. The STC casting machine according to claim 1, characterized in that: It also includes a frame, the belt conveying mechanism is supported on the frame, the frame is connected with a handle, and the handle is located on a side close to the entrance of the conveying channel.

9. The STC casting machine according to claim 1, characterized in that: It also includes a feeding structure, which is detachably connected to the inlet of the conveying channel, the top of the feeding structure is a round mouth shape, and the bottom of the feeding structure is a flat mouth shape that imitates the conveying channel.

10. The STC casting machine according to claim 1, characterized in that: It also includes a shell, which is wrapped around the outside of the belt conveying mechanism.

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