A concrete trowel

Abstract

This utility model belongs to the field of concrete construction equipment, specifically relating to a concrete trowel. It includes a frame located above a segment mold. Linear guide rails are mounted on both sides of the frame, with a linear motor and a sliding cover mounted on each rail. Mounting beams are mounted on the linear motors and sliding covers, and a cylinder is mounted above the mounting beams. A slider is mounted on the output end of the cylinder and is mounted on the mounting beams. A connecting rod is connected to the slider, and a trowel plate is hinged to the other end of the connecting rod. A cleaning component is provided on one side of the segment mold, including a cleaning groove with guide edges on both sides. The trowel plate is mounted on the guide edges. A lead screw is installed inside the cleaning groove, and a drive motor is located outside the cleaning groove. The output shaft of the drive motor is connected to the lead screw, and a cleaning block with scraping grooves is mounted on the lead screw. The purpose of this utility model is to provide a concrete trowel that solves the problem of residual concrete on the trowel plate after use, which affects the subsequent troweling effect.

Description

Technical Field

[0001] This utility model relates to the field of concrete construction equipment, specifically to a concrete smoothing tool. Background Technology

[0002] Shield tunnel segments are the permanent lining structure of shield tunnels. Their quality directly affects the overall quality and safety of the tunnel, influencing its waterproofing and durability. The outer arc surface of the shield segment is the outermost barrier of the tunnel, directly bearing the responsibility of resisting soil pressure, groundwater pressure, and other special loads. Its surface should be smooth, dense, and possess anti-seepage and anti-compression properties. Therefore, during the production of shield tunnel segments, after concrete pouring, the top cover of the segment mold is opened to smooth and finish the outer arc surface of the concrete, resulting in a smooth and flat surface for the final formed shield segment. However, in existing segment smoothing devices, the screed plate generally retains some concrete after use. If not cleaned properly, this will reduce the smoothing effect during subsequent uses, compromising segment quality and ultimately affecting the overall quality and safety of the tunnel.

[0003] To address this issue, we propose a concrete trowel to solve the problem that concrete residue remains on the trowel plate of the segment trowel after use, affecting the subsequent troweling effect. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a concrete trowel to solve the problem that a certain amount of concrete remains on the trowel after use, which affects the subsequent troweling effect.

[0005] This utility model solves the above-mentioned technical problems through the following technical means:

[0006] A concrete trowel includes a frame located above a segment mold. Linear guide rails are mounted on both sides of the frame. A linear motor and a sliding cover are slidably mounted on the linear guide rails. An installation beam is fixedly mounted on the linear motor and the sliding cover. A cylinder is fixedly mounted above the installation beam. A slider is fixedly mounted on the output end of the cylinder. A groove is formed on the installation beam, and the slider is slidably mounted on the groove. A connecting rod is fixedly connected to the slider, and a trowel plate is hinged to the other end of the connecting rod. A cleaning assembly is provided on one side of the segment mold. The cleaning assembly includes a cleaning trough. Guide edges are provided on both sides of the cleaning trough, matching guide edges on both sides of the segment mold. The trowel plate is slidably mounted on the guide edges. A drive motor is located outside the cleaning trough. A lead screw is fixedly mounted on the output shaft of the drive motor. The other end of the lead screw is rotatably mounted on the inner wall of the cleaning trough on the side away from the drive motor. A cleaning block is rotatably mounted on the lead screw via a thread. The cleaning block has a scraping groove that matches the trowel plate. A limit block is fixedly mounted on the inner wall of the cleaning trough near the cleaning block.

[0007] Based on the above technical solution, the present invention has made the following improvements:

[0008] Furthermore, a water inlet is located on the outer wall of the cleaning tank away from the drive motor, and several high-pressure water nozzles are located on the side of the cleaning tank away from the segment mold. These high-pressure water nozzles remove residual concrete from the cleaning blocks and screws after cleaning with the trowel, preventing concrete from hardening on the cleaning device. Simultaneously, the sprayed water wets the concrete that falls into the cleaning tank, lowering its temperature and increasing humidity, thus slowing down the concrete's hardening rate and making it less likely to adhere to or accumulate on the inner wall or bottom of the cleaning tank, reducing cleaning difficulties caused by rapid concrete hardening. The angle of the high-pressure water nozzles is adjustable; by adjusting the angle of the nozzles, particularly stubborn concrete residue can be removed specifically, providing flexibility and contributing to a smoother and more efficient cleaning process.

[0009] Furthermore, the bottom of the cleaning tank is equipped with multiple agitators; through the continuous rotation of the agitators, the concrete residue is stirred and dispersed in the water, which can prevent the concrete from settling and hardening at the bottom of the cleaning tank, reducing the cleaning difficulties caused by concrete deposition, and eliminating the need for time-consuming and laborious manual cleaning of the cleaning tank.

[0010] Furthermore, the length of the squeegee plate is less than the distance between the two guide edges on both sides of the segment mold. This prevents the squeegee plate from causing unnecessary wear or damage to the mold during movement, which helps to extend the service life of the mold and reduce the frequency and cost of mold replacement.

[0011] Furthermore, a discharge port is provided on the side of the cleaning tank near the segment mold; during the interval of changing segment molds, the sewage in the cleaning tank flows directly out from the discharge port and will not accumulate in the tank.

[0012] The beneficial effects of this utility model are as follows: The entire device has a reasonable structural design, is easy to operate, and is easy to maintain. By setting up a cleaning component, residual concrete on the trowel can be removed, preventing residual concrete from affecting the subsequent troweling effect. At the same time, by setting up a high-pressure water spray head, not only can concrete residue on the cleaning component be effectively removed, but also concrete that has fallen into the cleaning tank can be moistened, slowing down the setting speed of the concrete in the cleaning tank. Furthermore, by setting up a mixer, concrete is prevented from settling in the cleaning tank, reducing the cleaning difficulties caused by concrete accumulation, and eliminating the need for time-consuming and laborious manual cleaning of the cleaning tank. Attached Figure Description

[0013] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0014] Figure 1 This is a schematic diagram of a concrete smoothing tool structure in an embodiment of this utility model. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of a concrete smoothing tool structure in an embodiment of this utility model. Figure 2 ;

[0016] Figure 3 yes Figure 1 An enlarged view of point A;

[0017] Among them, 1-frame, 11-linear guide rail, 12-linear motor, 13-sliding cover, 14-mounting beam, 141-slide groove, 15-cylinder, 16-slider, 17-connecting rod, 2-segment mold, 21-guide edge one, 3-scraping plate, 4-cleaning component, 41-cleaning tank, 42-guide edge two, 43-drive motor, 44-lead screw, 45-cleaning block, 46-scraper groove, 47-limiting block, 51-water inlet, 52-high pressure water spray head, 53-agitator, 6-segment. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0019] like Figures 1 to 3As shown, a concrete trowel includes a frame 1 located above a segment mold 2. Linear guide rails 11 are mounted on both sides of the frame 1. A linear motor 12 and a sliding cover 13 are slidably mounted on the linear guide rails 11. A mounting beam 14 is fixedly mounted on the linear motor 12 and the sliding cover 13. The linear motor 12 drives the trowel plate 3 to move linearly in the horizontal direction, and the sliding cover 13 facilitates smoother movement of the trowel plate 3. A cylinder 15 is fixedly mounted above the mounting beam 14. A slider 16 is fixedly mounted on the output end of the cylinder 15. A groove 141 is formed on the mounting beam 14, and the slider 16 is slidably mounted on the groove 141. A connecting rod 17 is fixedly connected to the slider 16, and the other end of the connecting rod 17 is hinged to the trowel plate 3. The cylinder 15 is used to precisely control the vertical movement of the squeegee 3 along the arc of the tube mold 2. A cleaning component 4 is provided on one side of the tube mold 2. The cleaning component 4 includes a cleaning groove 41. The cleaning groove 41 has guide edges 42 on both sides that match the guide edges 21 on both sides of the tube mold 2, so that the squeegee 3 can smoothly carry out the next squeegee work after cleaning. The trowel plate 3 is slidably mounted on the guide rail 42. A drive motor 43 is provided on the outside of the cleaning groove 41. A lead screw 44 is fixedly mounted on the output shaft of the drive motor 43. The other end of the lead screw 44 is rotatably mounted on the inner wall of the cleaning groove 41 on the side away from the drive motor 43. A cleaning block 45 is rotatably mounted on the lead screw 44 by means of threads. The cleaning block 45 is provided with a scraping groove 46, which matches the trowel plate 3. A limit block 47 is fixedly mounted on the inner wall of the cleaning groove 41 on the side near the cleaning block 45. When the drive motor 43 is started, the drive motor 43 drives the lead screw 44 to rotate. Under the action of the limit block 47, the cleaning block 45 gradually moves from the end of the lead screw 44 to the scraping groove 46 and fits with the trowel plate 3. Under the rotation of the lead screw 44, the cleaning block 45 moves linearly back and forth on the lead screw 44, and the scraping groove 46 repeatedly scrapes away the residual concrete on the trowel plate 3.

[0020] Specifically, the outer wall of the cleaning tank 41 away from the drive motor 43 is provided with a water inlet 51, and the side of the cleaning tank 41 away from the segment mold 2 is provided with several high-pressure water spray heads 52. By setting the high-pressure water spray heads 52, the concrete residue remaining on the cleaning block 45 and screw rod 44 after cleaning the trowel 3 can be removed, preventing the concrete from solidifying on the cleaning device. At the same time, the sprayed water can wet the concrete that falls into the cleaning tank 41, lower its temperature and increase humidity, thereby slowing down the solidification rate of the concrete and making it less likely to adhere or accumulate on the inner wall or bottom of the cleaning tank 41, reducing the cleaning difficulties caused by rapid concrete solidification. The angle of the high-pressure water spray heads 52 is adjustable; by adjusting the angle of the spray heads, particularly stubborn concrete residue can be removed in a targeted manner, providing a certain degree of flexibility and helping to make the entire cleaning process smoother and more efficient.

[0021] Specifically, the bottom of the cleaning tank 41 is equipped with multiple agitators 53; through the continuous rotation of the agitators 53, the concrete residue is stirred and dispersed in the water, which can prevent the concrete from settling and hardening at the bottom of the cleaning tank 41, reduce the cleaning difficulties caused by concrete deposition, and eliminate the need for manual cleaning of the cleaning tank 41.

[0022] Specifically, the length of the smearing plate 3 is less than the distance between the two guide edges 42 on both sides of the segment mold 2, so as to prevent the smearing plate 3 from causing unnecessary wear or damage to the mold during the movement, which helps to extend the service life of the mold and reduce the frequency and cost of mold replacement.

[0023] Specifically, the cleaning tank 41 has a discharge port 411 on the side near the segment mold 2; during the interval of changing the segment mold 2, the sewage in the cleaning tank 41 flows directly out from the discharge port 411 and will not accumulate in the tank.

[0024] The method of using this utility model is as follows: Move the tube segment mold 2 to the fitting cleaning tank 41. The guide edges 21 on both sides of the tube segment mold 2 are aligned with the guide edges 42 on the cleaning tank 41. Start the linear motor 12 to drive the mounting beam 14 to move linearly on the linear guide rail 11. The smearing plate 3 then moves from the cleaning tank 41 to the tube segment mold 2 along the guide edges 42. Start the cylinder 15. The output end of the cylinder 15 drives the slider 16 to move up and down on the mounting beam 14. The connecting rod 17 fixedly installed on the slider 16 moves accordingly, thereby driving the smearing plate 3 to repeatedly smooth the tube segment 6 along the arc of the tube segment mold 2. After the smoothing work is completed, the smoothing plate 3 returns to the top of the lead screw 44, and the drive motor 43 is started to drive the lead screw 44 to rotate. Under the limiting action of the limiting block 47, the cleaning block 45 moves back and forth linearly on the lead screw 44, so that the scraper groove 46 on the cleaning block 45 cleans and scrapes away the residual concrete on the surface of the smoothing plate 3. At the same time, the high-pressure water spray head 52 and the agitator 53 are turned on. The high-pressure water spray head 52 sprays water to clean the cleaning block 45 and the smoothing plate 3 to ensure that the surface of the equipment is clean and free of residue. At this time, the agitator 53 at the bottom of the cleaning tank 41 rotates continuously to disperse and stir the concrete residue that falls into the cleaning tank 41, so as to prevent it from settling and hardening in the cleaning tank 41.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A concrete trowel, comprising a frame (1) positioned above a segment mold (2), characterized in that: Linear guide rails (11) are installed on both sides of the frame (1). A linear motor (12) and a sliding cover (13) are slidably installed on the linear guide rails (11) on both sides. An installation beam (14) is fixedly installed on the linear motor (12) and the sliding cover (13). A cylinder (15) is fixedly installed above the installation beam (14). A slider (16) is fixedly installed at the output end of the cylinder (15). A sliding groove (141) is opened on the installation beam (14). The slider (16) is slidably installed on the sliding groove (141). A connecting rod (17) is fixedly connected to the slider (16). A squeegee (3) is hinged to the other end of the connecting rod (17). A cleaning component (4) is provided on one side of the tube segment mold (2). The cleaning component (4) includes a cleaning tank (41). The cleaning tank (41) has guide edges (42) on both sides that match the guide edges (21) on both sides of the tube mold (2). The smearing plate (3) is slidably mounted on the guide edges (42). The cleaning tank (41) has a drive motor (43) on the outside. The output shaft of the drive motor (43) is fixedly mounted with a lead screw (44). The other end of the lead screw (44) is rotatably mounted on the inner wall of the cleaning tank (41) away from the drive motor (43). A cleaning block (45) is rotatably mounted on the lead screw (44) by means of a thread. The cleaning block (45) has a scraper groove (46) on it. The scraper groove (46) matches the smearing plate (3). A limit block (47) is fixedly mounted on the inner wall of the cleaning tank (41) near the cleaning block (45).

2. A concrete trowel according to claim 1, characterized in that: The cleaning tank (41) has a water inlet (51) on the outer wall away from the drive motor (43), and a number of high-pressure water spray heads (52) are provided on the side of the cleaning tank (41) away from the tube mold (2). The angle of the high-pressure water spray heads (52) is adjustable.

3. A concrete trowel according to claim 2, characterized in that: The bottom of the cleaning tank (41) is equipped with multiple agitators (53).

4. A concrete trowel according to claim 3, characterized in that: The length of the sizing plate (3) is less than the distance between the two guide edges (42) on both sides of the tube sheet mold (2).

5. A concrete trowel according to claim 4, characterized in that: The cleaning tank (41) has a discharge port (411) on the side near the segment mold (2).

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