Concrete floor finishing device with controllable floor thickness

Abstract

The application discloses a concrete floor surface collecting device capable of controlling the thickness of a floor, and relates to the technical field of building construction equipment. The application can limit and adjust the pressing depth of the scraper relative to the support during the concrete surface collecting process, realizes the dynamic compensation of the sinking depth of the device, can reduce the influence of the fluctuation of the sinking amount of the device on the actual surface collecting height during the surface collecting process, can realize the zero-sinking movement of the support frame on the un-solidified concrete surface, can enhance the flatness of the concrete surface collecting work, reduce the error between the surface collecting height and the elevation, improve the surface collecting effect, and makes the concrete surface collecting work more standard.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of building construction equipment, in particular to a concrete floor surface finishing device capable of controlling the thickness of a plate. BACKGROUND

[0002] Concrete floor surface finishing is a key construction link for ensuring the flatness, smoothness and durability of a floor surface, and the process steps, time control and matters needing attention need to be strictly followed in accordance with the specifications. A floor concrete surface finishing device is disclosed in Chinese Patent No. CN202221606258.2, which reduces the pressure on the target concrete during surface finishing, protects the surface of the target concrete, and reduces the amount of footprint processing, thereby facilitating surface finishing construction.

[0003] However, the current surface finishing device is not controllable in terms of the fluidity of concrete, and the device is prone to fluctuate up and down due to fluctuation in the settlement amount during surface finishing, so that the actual surface finishing height of the surface finishing scraper is fluctuating, which causes the surface flatness of the formed concrete to be poor and deviate from the standard height, and the formed thickness of the concrete floor cannot be accurately limited, and the operation and cooperation of the device as a whole cannot be effectively realized. SUMMARY

[0004] The application provides a concrete floor surface finishing device capable of controlling the thickness of a plate, which can effectively solve the problem that the current surface finishing device is not controllable in terms of the fluidity of concrete, and the device is prone to fluctuate up and down due to fluctuation in the settlement amount during surface finishing, so that the actual surface finishing height of the surface finishing scraper is fluctuating, which causes the surface flatness of the formed concrete to be poor and deviate from the standard height, and the formed thickness of the concrete floor cannot be accurately limited, and the operation and cooperation of the device as a whole cannot be effectively realized.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: a concrete floor surface finishing device capable of controlling the thickness of a plate, comprising a support, a traction frame is installed at the middle of one end of the support, side ears are installed at the middle of the end faces of the two sides of the support, and a three-point compensation mechanism is installed at the bottom of the support.

[0006] The three-point compensation mechanism comprises a hanging box.

[0007] The hanging box is installed at the bottom of the support, a scraper is installed at the bottom end of the hanging box, a hanging plug is symmetrically and slidably installed in the hanging box, a slide rod is installed at the middle of the top end of the hanging plug, a universal joint is installed at the top end of the slide rod, a threaded cylinder is rotatably installed in the top end of the side ear, and a lead screw is threadedly installed at the bottom end of the threaded cylinder.

[0008] The strip box is internally slidably installed with a sliding plate, the bottom end of the sliding plate is symmetrically installed with a supporting rod, the bottom end of the supporting rod is installed with a secondary plate, the two ends of the hanging box are embeddedly and rotatably installed with a screw rod, the end of the screw rod is installed with an extension frame, and the two ends of the strip box are internally installed with a shaft rod.

[0009] Preferably, the hanging box is internally slidably installed with a sliding plug at the position corresponding to the screw rod, the top end of the support is embeddedly and rotatably installed with a rotating shaft, the outer curved surface of the rotating shaft is symmetrically installed with a rotating wheel at the position inside the support, the top end of the rotating shaft is installed with a driving wheel, the top end of the threaded cylinder is installed with a transmission wheel, and the outer side of the transmission wheel is sleeved with a transmission belt.

[0010] The top of the end face of the support is symmetrically installed with a top pipe, the bottom of the end face of the support is symmetrically installed with a bottom pipe, the top corner of one side of the hanging box is installed with an outer through pipe, the top corner of the other side of the hanging box is installed with an inner through pipe, and the end of the top pipe, the bottom pipe, the outer through pipe and the inner through pipe is installed with a guide valve.

[0011] Preferably, the sliding cavity is formed in the hanging box at the position corresponding to the lifting plug, the bottom end of the lead screw is connected with the sliding rod through the universal joint, the sliding rod is slidably connected with the hanging box, and the area ratio of the lifting plug to the secondary plate is equal to the ratio of the total mass of the hanging box and the scraper to the total mass of the sliding plate, the supporting rod and the secondary plate.

[0012] Preferably, the rotating cavity is formed in the support at the position corresponding to the rotating wheel, the main cavity is formed in the hanging box at the position corresponding to one sliding plug, and the secondary cavity is formed in the hanging box at the position corresponding to another sliding plug.

[0013] The cavities inside the main cavity and the secondary cavity between the sliding plug and the extension frame are communicated with the rotating cavity at the top through the top pipe and the guide valve, the cavities inside the main cavity and the secondary cavity on the other side of the sliding plug are communicated with the rotating cavity at the bottom through the bottom pipe and the guide valve, and the guide valve is a one-way valve.

[0014] Preferably, the driving wheel and the transmission wheel are connected through the transmission belt, the diameter of the driving wheel is twice the diameter of the transmission wheel, and the pitch of the screw rod is twice the pitch of the lead screw.

[0015] Preferably, the sliding plug is connected with the screw rod through threads, the inside of the support at the position outside the rotating wheel and the inside of the hanging box at the positions on both sides of the sliding plug are filled with hydraulic liquid, and the deflection directions of the two rotating wheels are opposite.

[0016] Preferably, a dynamic adjustment mechanism is installed on the outside of the hanging box, the dynamic adjustment mechanism comprises a threaded rod.

[0017] The top end of the support is embedded with a threaded rod rotatably installed on one side of the rotating shaft, a pressing plate is installed on the outside of the threaded rod at the position inside the support through screwing, a pressure regulating cavity is formed at the position corresponding to the pressing plate inside the support, a connecting pipe is installed at the middle of the bottom end of the pressure regulating cavity, a through groove is formed at the position between the two hanging plugs on the top of the side end face of the hanging box, an adjusting valve is embedded and installed at the position corresponding to the hanging plug on one side of the top end of the strip box and the bottom of the side end face of the hanging box, and an air pressure gauge is embedded and installed at the position corresponding to the hanging plug on the other side of the top end of the strip box, the bottom of the side end face of the hanging box and the bottom of the side end face of the pressure regulating cavity.

[0018] The side end of the lug is provided with a mark plate, the top end of the hanging box is provided with a scale on both sides, the middle of the side end face of the hanging box is provided with a support, the end of the support is provided with a cross beam, the cross beam is embedded and slidably installed with a sliding rod at both ends, the end of the sliding rod is provided with a connecting block, and the middle of the top end of the connecting block is embedded and installed with a ball head seat.

[0019] The side end face of the support is symmetrically provided with a sliding box at the edge, the sliding box is slidably installed with a piston inside, the sliding box is embedded and slidably installed with a plug rod on one side of the bottom end, the support is symmetrically provided with an adjusting cavity at the position on the other side of the rotating wheel inside, the adjusting cavity is slidably installed with a driving plate inside, the top end of the support is embedded and rotatably installed with a driving rod at the position corresponding to the middle of the adjusting cavity, the bottom of the side end face of the adjusting cavity is provided with a bottom groove at the position corresponding to the sliding box, and the sliding box is provided with a communicating pipe on the other side of the bottom end.

[0020] Preferably, the space at the bottom of the sliding plate inside the strip box is communicated with the pressure regulating cavity through the connecting pipe, the space at the top of the hanging plug inside the hanging box is communicated with the connecting pipe through the through groove, and the space at the bottom of the pressing plate inside the pressure regulating cavity is filled with air.

[0021] Preferably, the cavity at the bottom of the piston inside the sliding box is communicated with the space at the bottom of the driving plate inside the adjusting cavity through the bottom groove, and the two ends of the two communicating pipes are respectively communicated with the bottoms of the two sliding boxes on the same side of the hanging box.

[0022] Preferably, the space at the bottom of the piston inside the sliding box and the space at the bottom of the driving plate inside the adjusting cavity are both filled with air, and the maximum volume of the cavity at the bottom of the piston inside the sliding box is half of the maximum volume of the cavity at the bottom of the driving plate inside the adjusting cavity.

[0023] Compared with the prior art, the present application has the advantages that the structure is scientific and reasonable, safe and convenient to use.

[0024] 1. Equipped with a three-point compensation mechanism, the support frame structure can be constructed through the cooperation of supports, traction frames, and side lugs, effectively improving the convenience and stability of the finishing work. The three-point balance structure can be constructed through the cooperation of the lifting box, lifting plug, sliding rod, telescopic frame, shaft, strip box, sliding plate, and support rod. It can limit and level the relative position of the scraper and the auxiliary plates on both sides, and limit and adjust the downward pressure depth of the scraper relative to the support during the concrete finishing process, realizing dynamic compensation for the sinking depth of the device. It can significantly reduce the impact of the fluctuation of the device's settlement during the finishing process on the actual finishing height. It can indirectly achieve zero settlement movement of the support frame on the uncured concrete surface, effectively enhancing the flatness of the concrete finishing work, significantly reducing the error between the finishing height and the elevation, greatly improving the reliability and effectiveness of the finishing work, improving the finishing effect, and making the concrete finishing work more standardized.

[0025] By cooperating with screws, plugs, threaded cylinders, lead screws, rotating shafts, rotating wheels, drive wheels, transmission wheels, and transmission belts, a transmission conversion structure can be constructed. This structure can convert and utilize the finishing pressure during the finishing process, providing a stable driving force for the three-point balance structure. This makes the dynamic compensation of the device's sinking depth smoother, more stable, more efficient, and more reliable. By cooperating with the lifting box, plugs, universal joints, threaded cylinders, and lead screws, the finishing height can be initially limited and adjusted. Combined with the dynamic compensation of the device's sinking depth, the finishing height of the scraper can be precisely limited, thereby achieving precise adjustment of the concrete slab thickness. It also realizes the integrated operation and coordination of the support frame, thickness adjustment mechanism, and finishing scraper, improving the convenience of finishing while enhancing the controllability of the device and effectively improving the concrete forming effect. On the other hand, it can realize the automatic leveling of the scraper, further improving construction efficiency and quality simultaneously. By cooperating with the jacking pipe, bottom pipe, external pipe, internal pipe, and pilot valve, the smoothness and continuity of the dynamic compensation work can be effectively improved.

[0026] 2. Equipped with a dynamic adjustment mechanism, through the cooperation of threaded rods, pressure plates, pressure regulating chambers, connecting pipes, through grooves, regulating valves, and air pressure gauges, the air pressure on both sides of the scraper and auxiliary plate can be limited and adjusted. On the one hand, it can effectively reduce the interference of the device's own weight during the finishing process, and can more accurately and efficiently limit and adjust the finishing pressure, making the concrete finishing pressure more compatible with the concrete setting degree, effectively improving the stability and reliability of the finishing pressure during the finishing process, making the finishing work more flexible and convenient, and enabling the concrete finishing work to meet the needs of different working conditions. On the other hand, it can make the scraper and auxiliary plate fit the concrete better, ensuring the sufficiency and effectiveness of the concrete finishing work, improving the concrete surface density, impermeability, and aesthetics, reducing cracks and defects, eliminating air bubbles and cracks, and enhancing surface smoothness and durability.

[0027] By combining the support column, crossbeam, sliding rod, connecting block, ball head seat, slide box, piston, and plug rod, an angle compensation structure can be constructed. Combined with the pressure adjustment and compensation functions of the adjusting chamber, drive plate, drive rod, bottom groove, and connecting pipe, this allows for precise limitation of the tilt angle of the scraper and auxiliary plate. This effectively meets the needs of different slopes during the finishing process, expanding the applicability of the device and enabling it to be applied to more complex working conditions, further enhancing its flexibility. Furthermore, it allows for secondary adjustment and compensation of the finishing pressure, effectively expanding the effective adjustment range of the finishing pressure and further increasing the device's effective application range and practicality. Finally, by using a positioning plate and scale, the finishing height can be calibrated, further improving the convenience and accuracy of adjusting the finishing height and angle.

[0028] In summary, this concrete finishing device can achieve integrated operation and coordination of the support frame, thickness adjustment mechanism and finishing scraper, and can dynamically compensate for the settlement of the device, and precisely limit the finishing height and finishing angle to achieve dynamic finishing, making the finishing process more stable. It not only improves the convenience of finishing work, but also greatly improves the finishing effect. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0030] In the attached diagram:

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the telescopic frame installation structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the strip box mounting structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the three-point compensation mechanism of the present invention;

[0035] Figure 5 This is a schematic diagram of the scraper mounting structure of the present invention;

[0036] Figure 6 This is a schematic diagram of the dynamic adjustment mechanism structure of the present invention;

[0037] Figure 7 This is a schematic diagram of the driver board mounting structure of the present invention;

[0038] Figure 8 This is a schematic diagram of the beam installation structure of the present invention;

[0039] The diagram is labeled: 1. Support; 11. Traction frame; 12. Side lug;

[0040] 200. Three-point compensation mechanism; 201. Hoisting box; 202. Scraper; 203. Hoisting plug; 204. Slide rod; 205. Universal joint; 206. Threaded cylinder; 207. Lead screw; 208. Strip box; 209. Slide plate; 210. Support rod; 211. Sub-plate; 212. Screw; 213. Telescopic frame; 214. Shaft; 215. Slide plug; 216. Rotating shaft; 217. Rotating wheel; 218. Drive wheel; 219. Transmission wheel; 220. Transmission belt; 221. Jacking pipe; 222. Bottom pipe; 223. External pipe; 224. Internal pipe; 225. Pilot valve;

[0041] 2031, sliding cavity; 2151, main cavity; 2152, secondary cavity; 2171, rotating cavity;

[0042] 300. Dynamic adjustment mechanism; 301. Threaded rod; 302. Pressure plate; 303. Pressure regulating chamber; 304. Connecting pipe; 305. Through groove; 306. Regulating valve; 307. Pressure gauge; 308. Position plate; 309. Scale; 310. Support column; 311. Crossbeam; 312. Sliding rod; 313. Connecting block; 314. Ball head seat; 315. Sliding box; 316. Piston; 317. Plug rod; 318. Adjusting chamber; 319. Drive plate; 320. Drive rod; 321. Bottom groove; 322. Connecting pipe. Detailed Implementation

[0043] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0044] Example: Figures 1-8 As shown, the present invention provides a technical solution, a concrete floor slab finishing device with controllable slab thickness, including a support 1, a traction frame 11 installed at the middle of one end of the support 1, side ears 12 installed at the middle of both end faces of the support 1, and a three-point compensation mechanism 200 installed at the bottom of the support 1.

[0045] The three-point compensation mechanism 200 includes a hoisting box 201;

[0046] A hanging box 201 is installed at the bottom of the support 1. A scraper 202 is installed at the bottom of the hanging box 201. A hanging plug 203 is symmetrically slidably installed inside the hanging box 201. A sliding rod 204 is installed at the middle of the top of the hanging plug 203. A universal head 205 is installed at the top of the sliding rod 204. A threaded cylinder 206 is rotatably installed at the top of the side ear 12. A lead screw 207 is threadedly installed at the bottom of the threaded cylinder 206. A sliding cavity 2031 is opened inside the hanging box 201 at the position corresponding to the hanging plug 203. The bottom of the lead screw 207 is connected to the sliding rod 204 through the universal head 205. The sliding rod 204 is slidably connected to the hanging box 201 to improve the adjustment convenience of the device and facilitate the limitation of plate thickness.

[0047] Both sides of the lifting box 201 are equipped with strip boxes 208. Slide plates 209 are slidably installed inside the strip boxes 208. Support rods 210 are symmetrically installed on both sides of the bottom end of the slide plates 209. Sub-plates 211 are installed at the bottom end of the support rods 210. Screws 212 are rotatably installed at both ends of the lifting box 201. Telescopic frames 213 are installed at the ends of the screws 212. Shafts 214 are installed in the middle of both ends of the strip boxes 208. The ratio of the area of ​​the lifting plug 203 to the area of ​​the sub-plate 211 is equal to the ratio of the total mass of the lifting box 201 and the scraper 202 to the total mass of the slide plates 209, support rods 210 and sub-plates 211, so as to ensure balance.

[0048] Inside the hoisting box 201, a sliding plug 215 is slidably installed at the position corresponding to the screw 212. A rotating shaft 216 is embedded and rotatably installed at the top of the support 1. Rotating wheels 217 are symmetrically installed on the outer curved surface of the rotating shaft 216 at the position inside the support 1. The sliding plug 215 is connected to the screw 212 by threads. Hydraulic fluid is filled at the position outside the rotating wheel 217 inside the support 1 and at the positions on both sides of the sliding plug 215 inside the hoisting box 201. The two rotating wheels 217 deflect in opposite directions to automatically adjust the plate thickness. A drive wheel 218 is installed at the top of the rotating shaft 216, and a transmission wheel 219 is installed at the top of the threaded cylinder 206. A transmission belt 220 is sleeved on the outside of the transmission wheel 219. The drive wheel 218 and the transmission wheel 219 are connected by the transmission belt 220. The diameter of the drive wheel 218 is twice the diameter of the transmission wheel 219, and the pitch of the screw 212 is twice the pitch of the lead screw 207 to improve construction accuracy.

[0049] A jacking pipe 221 is symmetrically installed on the top of both ends of the support 1, and a bottom pipe 222 is symmetrically installed on the bottom of both ends of the support 1. An external pipe 223 is installed at one corner of the top of the hoisting box 201, and an internal pipe 224 is installed at the other corner of the top of the hoisting box 201. A pilot valve 225 is installed at the end of the jacking pipe 221, the bottom pipe 222, the external pipe 223, and the internal pipe 224. A rotating cavity 2171 is opened inside the support 1 at the position corresponding to the rotating wheel 217. A main cavity 2151 is opened inside the hoisting box 201 at the position corresponding to one sliding plug 215, and a secondary cavity 2152 is opened inside the hoisting box 201 at the position corresponding to another sliding plug 215.

[0050] The cavities inside the main cavity 2151 and the auxiliary cavity 2152 located between the slide plug 215 and the telescopic frame 213 are connected to the rotating cavity 2171 at the top through the jacking pipe 221 and the pilot valve 225. The cavities inside the main cavity 2151 and the auxiliary cavity 2152 located on the other side of the slide plug 215 are connected to the rotating cavity 2171 at the bottom through the bottom pipe 222 and the pilot valve 225. The pilot valve 225 is a one-way valve to dynamically compensate for the plate thickness and improve the concrete forming accuracy. A dynamic adjustment mechanism 300 is installed on the outside of the hoisting box 201. The dynamic adjustment mechanism 300 includes a threaded rod 301.

[0051] A threaded rod 301 is rotatably mounted on one side of the pivot 216 at the top of the support 1. A pressure plate 302 is threadedly mounted on the outside of the threaded rod 301 at the inside of the support 1. A pressure regulating cavity 303 is opened inside the support 1 at the position corresponding to the pressure plate 302. A connecting pipe 304 is installed in the middle of the bottom end of the pressure regulating cavity 303. A through groove 305 is opened at the top of the side end face of the hanging box 201 at the position between the two hanging plugs 203. The space inside the strip box 208 at the bottom of the slide plate 209 is connected to the pressure regulating cavity 303 through the connecting pipe 304. The space inside the hanging box 201 at the top of the hanging plugs 203 is connected to the connecting pipe 304 through the through groove 305. The space inside the pressure regulating cavity 303 at the bottom of the pressure plate 302 is filled with air to limit the surface pressure.

[0052] A regulating valve 306 is embedded in one side of the bottom of the side end face of the hoisting box 201 and at the top of the bar box 208 corresponding to the position of the hanging plug 203. A pressure gauge 307 is embedded in the other side of the bottom of the side end face of the hoisting box 201, at the other side of the top of the bar box 208 corresponding to the position of the hanging plug 203, and at the bottom of the side end face of the pressure regulating chamber 303.

[0053] A positioning plate 308 is installed at the end of the side ear 12. A ruler 309 is installed on both sides of the top of the hoisting box 201. A support column 310 is installed in the middle of both sides of the hoisting box 201. A crossbeam 311 is installed at the end of the support column 310. A sliding rod 312 is embedded in both ends of the crossbeam 311. A connecting block 313 is installed at the end of the sliding rod 312. A ball head seat 314 is embedded in the middle of the top of the connecting block 313.

[0054] A sliding box 315 is symmetrically installed on both sides of the support 1. A piston 316 is slidably installed inside the sliding box 315. A stop rod 317 is slidably installed on one side of the bottom of the sliding box 315. An adjustment cavity 318 is symmetrically opened inside the support 1 at the other side of the rotating wheel 217. A drive plate 319 is slidably installed inside the adjustment cavity 318. Air is filled in the sliding box 315 at the bottom of the piston 316 and the adjustment cavity 318 at the bottom of the drive plate 319. The maximum volume of the cavity at the bottom of the piston 316 inside the sliding box 315 is half the maximum volume of the cavity at the bottom of the drive plate 319 inside the adjustment cavity 318, so as to improve the control accuracy of the device and improve the construction effect.

[0055] A drive rod 320 is embedded and rotatably mounted at the top of the support 1, corresponding to the middle position of the adjustment cavity 318. A bottom groove 321 is opened at the bottom of the side end face of the adjustment cavity 318, corresponding to the position of the slide box 315. A connecting pipe 322 is installed on the other side of the bottom of the slide box 315. The cavity inside the slide box 315 located at the bottom of the piston 316 is connected to the space inside the adjustment cavity 318 located at the bottom of the drive plate 319 through the bottom groove 321. The two connecting pipes 322 are respectively connected to the bottom of the two slide boxes 315 located on the same side of the hanging box 201 to limit the slope of the surface and improve the flexibility of the device.

[0056] The working principle and usage process of this invention: When applying this finishing device to finish a concrete floor slab, firstly, according to the actual conditions, the support 1 is connected to the external traction mechanism through the traction frame 11, and the device is transported to the work area. In the initial state, the presence of the universal head 205 allows the angle between the slide rod 204 and the lead rod 207 to deflect freely. In addition, the hanging plug 203 and the slide rod 204 can slide relative to the hanging box 201. After the support 1 is connected to the external traction mechanism, the device can automatically level itself under the action of gravity.

[0057] Next, through the corresponding regulating valve 306, air is injected into the sliding cavity 2031 and the strip box 208 inside the hoisting box 201 using an external air inflation device to replenish the air pressure inside the sliding cavity 2031 and the strip box 208 inside the hoisting box 201. According to the connected air pressure gauge 307, the air pressure at the bottom of the hoisting plug 203 and the top of the slide plate 209 is initially limited to ensure sufficient pressure at the bottom of the hoisting plug 203 and the top of the slide plate 209.

[0058] Then, rotate the threaded rod 301 to drive the pressure plate 302 down, forcing the air inside the pressure regulating chamber 303 to flow into the connecting pipe 304 under the pressure of the pressure plate 302. Under the conduction of the connecting pipe 304 and the through groove 305, the air flows into the sliding chamber 2031 and the strip box 208 in sequence, adjusting the air pressure at the top of the hanging plug 203 and the air pressure at the bottom of the sliding plate 209, so that the scraper 202 and the auxiliary plate 211 rise synchronously under the action of air pressure. The optimal state is when the length of the sliding rod 204 retracted into the hanging box 201 is half the total length of the sliding rod 204. At this time, the hanging plug 203 is located in the middle of the hanging box 201, and the sliding plate 209 is also located in the middle of the strip box 208, which makes subsequent adjustment easier. Record the pressure on both sides of the hanging plug 203 and the sliding plate 209 at this time.

[0059] Next, the drive wheel 218 is rotated, forcing the two transmission wheels 219 to rotate synchronously under the drive of the transmission belt 220, and driving the two threaded cylinders 206 to rotate synchronously, making a preliminary adjustment to the downward pressing length of the screw 207, so that the scraper 202 and the auxiliary plate 211 contact the concrete surface, and according to the indication of the positioning plate 308 and the ruler 309, the height of the scraper 202 and the auxiliary plate 211 is initially limited according to the elevation.

[0060] In the initial state, after the aforementioned adjustments, the jack 203 and the slide plate 209 are in a balanced state under the action of air pressure on both sides. The air pressure on both sides cancels out the weight of the jack 201, scraper 202, slide plate 209, support rod 210 and auxiliary plate 211. At this time, according to the actual construction conditions, the threaded rod 301 can be rotated again to drive the pressure plate 302 to rise, and the air pressure at the top of the jack 203 and the air pressure at the bottom of the slide plate 209 can be finely adjusted for the second time.

[0061] At this time, as the air at the top of the plug 203 and the bottom of the slide plate 209 is extracted, the air pressure support force on the top of the plug 203 and the bottom of the slide plate 209 will decrease accordingly. Correspondingly, the concrete will provide corresponding support force to the scraper 202 and the auxiliary plate 211 to compensate for the reduced air pressure support force on the top of the plug 203 and the bottom of the slide plate 209. That is, the pressure of the scraper 202 and the auxiliary plate 211 on the bottom concrete will increase accordingly. The pressure of the scraper 202 and the auxiliary plate 211 on the bottom concrete can be adjusted according to the situation. This pressure is the finishing pressure during the finishing process, and its magnitude is equal to the reduction value of the air pressure support force on the top of the plug 203 and the bottom of the slide plate 209.

[0062] Next, rotate the drive rods 320 on both sides respectively to drive the drive plate 319 to slide inside the adjustment cavity 318, so that the air inside the slide box 315 is drawn into the adjustment cavity 318 through the bottom groove 321 or the air inside the adjustment cavity 318 is pressed into the slide box 315 through the bottom groove 321. With the connection of the connecting pipe 322, by rotating the corresponding drive rod 320, the air pressure inside the two slide boxes 315 on one side of the drive rod 320 can be synchronously controlled. According to actual needs, the air pressure at the bottom of the pistons 316 on both sides can be adjusted to change the pulling force of the plug rods 317 on both sides to the connecting block 313.

[0063] Under the transmission of the support column 310, crossbeam 311 and sliding rod 312, the pressure is applied to the hoisting box 201, which can change the drag force on both sides of the hoisting box 201. The hoisting box 201 can be deflected accordingly under the drag force on both sides. Furthermore, according to the indication of the positioning plate 308 and the scale 309, the angle of the hoisting box 201 can be adjusted by changing the drag force on both sides of the hoisting box 201 to meet the needs of different slopes during the concrete finishing process. When there is no slope requirement, the finishing pressure during the finishing process can also be adjusted compensatorily by rotating the drive rods 320 on both sides. While expanding the controllable range of finishing pressure, the adjustment accuracy of finishing pressure is improved. It is only necessary to ensure that the air pressure at the bottom of the pistons 316 on both sides remains the same during the adjustment process.

[0064] After completing the above adjustments, the device can be pulled by an external traction mechanism to finish the concrete surface. During the finishing process, due to the uncontrollable flow of concrete, the concrete surface will inevitably fluctuate as the device is pulled forward by the external traction mechanism, and the device will move up and down accordingly.

[0065] For ease of description, the direction of travel of the device is taken as the front direction. When the front side is concave, the concrete support force on the front sub-plate 211 will decrease, while the concrete support force on the rear sub-plate 211 will remain at the standard state. This will create a pressure difference on both sides of the telescopic frame 213, causing the telescopic frame 213 to deflect accordingly under the action of the pressure difference, adjusting the position of the strip boxes 208 on both sides until the force state of the sliding plates 209 on both sides returns to the equilibrium state.

[0066] During this process, as the telescopic frame 213 deflects, it will drive the screw 212 to rotate accordingly, forcing the slide plug 215 to slide towards the telescopic frame 213 on one side of the main cavity 2151. Under the guidance of the pilot valve 225, the hydraulic fluid inside the main cavity 2151 is pressed into the rotating cavity 2171 at the top through the jacking pipe 221 connected to it. Under the pressure, the hydraulic fluid then flows into the cavity between the telescopic frame 213 and the slide plug 215 on one side of the secondary cavity 2152 through the jacking pipe 221 on the other side under the guidance of the pilot valve 225 on the other side.

[0067] During this process, as hydraulic fluid flows into the rotating chamber 2171 at the top, the rotating wheel 217 at the top will rotate accordingly under the pressure of the hydraulic fluid, and the rotating shaft 216 will drive the drive wheel 218 to rotate synchronously under the drive of the rotating wheel 217. Then, under the drive of the transmission belt 220, the threaded cylinders 206 on both sides will rotate synchronously under the drive of the transmission wheel 219, reducing the extension length of the lead screw 207, lifting the lifting box 201, reducing the downward pressure depth of the scraper 202, compensating for the sinking depth of the device, and keeping the scraper 202 at the elevation.

[0068] Conversely, if the front side bulges upward, the concrete support force on the front sub-plate 211 will decrease, while the concrete support force on the rear sub-plate 211 will remain at the standard level. The telescopic frame 213 will deflect in the opposite direction under the action of the pressure difference. At this time, the sliding plug 215 will deflect in the opposite direction under the drive of the screw 212. Under the guidance of the pilot valve 225, the hydraulic fluid inside the main chamber 2151 will be pressed into the bottom rotating chamber 2171 through the bottom pipe 222. Finally, the threaded cylinder 206 will rotate in the opposite direction under the drive of the bottom rotating wheel 217, increasing the downward pressing depth of the scraper 202, compensating for the sinking depth of the device, and keeping the scraper 202 at the elevation.

[0069] During the above process, as the sliding plug 215 slides towards the telescopic frame 213 on the side of the main cavity 2151, under the guidance of the corresponding pilot valve 225, the sliding plug 215 inside the secondary cavity 2152 will press the hydraulic fluid inside the secondary cavity 2152 near the main cavity 2151 into the cavity inside the main cavity 2151 near the secondary cavity 2152 through the external pipe 223, thereby replenishing the hydraulic fluid in the main cavity 2151;

[0070] Conversely, during the sliding of the slide plug 215 toward the telescopic frame 213 on one side of the secondary cavity 2152, the slide plug 215 inside the secondary cavity 2152 will press the hydraulic fluid located on the other side of the slide plug 215 inside the secondary cavity 2152 into the space located on the other side of the slide plug 215 inside the main cavity 2151 through the inner tube 224, replenishing the hydraulic fluid in the main cavity 2151, so as to ensure the stability and continuity of the dynamic adjustment of the pressing depth of the scraper 202.

[0071] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A concrete floor slab finishing device with controllable thickness, comprising a support (1), characterized in that: A traction frame (11) is installed at the middle of one end of the support (1), and side ears (12) are installed at the middle of both ends of the support (1). A three-point compensation mechanism (200) is installed at the bottom of the support (1). The three-point compensation mechanism (200) includes a hoisting box (201); The support (1) is equipped with a hanging box (201) at the bottom, a scraper (202) is installed at the bottom end of the hanging box (201), a hanging plug (203) is symmetrically slidably installed inside the hanging box (201), a sliding rod (204) is installed at the middle of the top of the hanging plug (203), a universal head (205) is installed at the top of the sliding rod (204), a threaded cylinder (206) is inserted and rotated at the top of the side ear (12), and a screw rod (207) is installed at the bottom of the threaded cylinder (206) through a thread. Both sides of the hanging box (201) are equipped with strip boxes (208), and a sliding plate (209) is slidably installed inside the strip box (208). Support rods (210) are symmetrically installed on both sides of the bottom end of the sliding plate (209), and a sub-plate (211) is installed at the bottom end of the support rod (210). Both ends of the hanging box (201) are embedded with screws (212) for rotation. A telescopic frame (213) is installed at the end of the screw (212). Both ends of the strip box (208) are equipped with shafts (214). Inside the hoisting box (201), a sliding plug (215) is slidably installed at the position corresponding to the screw (212). A rotating shaft (216) is embedded and rotatably installed at the top of the support (1). A rotating wheel (217) is symmetrically installed on the outer curved surface of the rotating shaft (216) at the position inside the support (1). The top of the rotating shaft (216) is equipped with a drive wheel (218), the top of the threaded cylinder (206) is equipped with a transmission wheel (219), and a transmission belt (220) is sleeved on the outside of the transmission wheel (219). A top pipe (221) is symmetrically installed on the top of both sides of the support (1), a bottom pipe (222) is symmetrically installed on the bottom of both sides of the support (1), an external pipe (223) is installed at one corner of the top of the hoisting box (201), an internal pipe (224) is installed at the other corner of the top of the hoisting box (201), and a pilot valve (225) is installed at the end of the top pipe (221), bottom pipe (222), external pipe (223) and internal pipe (224). The support (1) has a rotating cavity (2171) at the position corresponding to the rotating wheel (217), the hanging box (201) has a main cavity (2151) at the position corresponding to one sliding plug (215), and the hanging box (201) has a secondary cavity (2152) at the position corresponding to another sliding plug (215). The cavity between the slub (215) and the telescopic frame (213) inside the main cavity (2151) and the auxiliary cavity (2152) is connected to the rotating cavity (2171) at the top through the top pipe (221) and the pilot valve (225). The cavity on the other side of the slub (215) inside the main cavity (2151) and the auxiliary cavity (2152) is connected to the rotating cavity (2171) at the bottom through the bottom pipe (222) and the pilot valve (225). The pilot valve (225) is a one-way valve. The support (1) is filled with hydraulic fluid at the position outside the wheel (217) and the box (201) is filled with hydraulic fluid at the positions on both sides of the slide (215), and the two wheels (217) deflect in opposite directions.

2. The concrete slab finishing device with controllable thickness according to claim 1, characterized in that, The inside of the hoisting box (201) is provided with a sliding cavity (2031) at the position corresponding to the hoisting plug (203). The bottom end of the lead screw (207) is connected to the slide rod (204) through the universal joint (205). The slide rod (204) is slidably connected to the hoisting box (201). The ratio of the area of ​​the hoisting plug (203) to the area of ​​the auxiliary plate (211) is equal to the ratio of the total mass of the hoisting box (201) and the scraper (202) to the total mass of the slide plate (209), the support rod (210) and the auxiliary plate (211).

3. A concrete slab finishing device with controllable thickness according to claim 1, characterized in that, The drive wheel (218) and the transmission wheel (219) are connected by a transmission belt (220), and the diameter of the drive wheel (218) is twice the diameter of the transmission wheel (219). The pitch of the screw (212) is twice the pitch of the lead screw (207).

4. A concrete slab finishing device with controllable thickness according to claim 1, characterized in that, The slide (215) is connected to the screw (212) by a thread.

5. A concrete slab finishing device with controllable thickness according to claim 1, characterized in that, A dynamic adjustment mechanism (300) is installed on the outside of the hoisting box (201), and the dynamic adjustment mechanism (300) includes a threaded rod (301). A threaded rod (301) is rotatably installed on the top of the support (1) on one side of the rotating shaft (216). A pressure plate (302) is threadedly installed on the outside of the threaded rod (301) at the inside of the support (1). A pressure regulating chamber (303) is opened inside the support (1) corresponding to the pressure plate (302). A connecting pipe (304) is installed in the middle of the bottom end of the pressure regulating chamber (303). A through groove (305) is opened on the top of the side end face of the hoisting box (201) between the two hanging plugs (203). A regulating valve (306) is embedded on one side of the bottom of the side end face of the hoisting box (201) and on one side of the top of the strip box (208) corresponding to the hanging plug (203). A pressure gauge (307) is embedded on the other side of the bottom of the side end face of the hoisting box (201), on the other side of the top of the strip box (208) corresponding to the hanging plug (203), and on the bottom of the side end face of the pressure regulating chamber (303). A positioning plate (308) is installed at the end of the side ear (12), a ruler (309) is installed on both sides of the top of the hoisting box (201), a support column (310) is installed in the middle of both sides of the hoisting box (201), a crossbeam (311) is installed at the end of the support column (310), a sliding rod (312) is embedded in both ends of the crossbeam (311), a connecting block (313) is installed at the end of the sliding rod (312), and a ball head seat (314) is embedded in the middle of the top of the connecting block (313). The support (1) has symmetrically installed sliding boxes (315) on both sides of the end face. A piston (316) is slidably installed inside the sliding box (315). A stopper rod (317) is slidably installed on one side of the bottom end of the sliding box (315). An adjustment cavity (318) is symmetrically opened inside the support (1) at the other side of the rotating wheel (217). A drive plate (319) is slidably installed inside the adjustment cavity (318). A drive rod (320) is rotatably installed at the top of the support (1) corresponding to the middle of the adjustment cavity (318). A bottom groove (321) is opened at the bottom of the side end face of the adjustment cavity (318) corresponding to the position of the sliding box (315). A connecting pipe (322) is installed on the other side of the bottom end of the sliding box (315).

6. A concrete slab finishing device with controllable thickness according to claim 5, characterized in that, The space inside the strip box (208) located at the bottom of the slide plate (209) is connected to the pressure regulating chamber (303) through the connecting pipe (304). The space inside the hanging box (201) located at the top of the hanging plug (203) is connected to the connecting pipe (304) through the through groove (305). The space inside the pressure regulating chamber (303) located at the bottom of the pressure plate (302) is filled with air.

7. A concrete slab finishing device with controllable thickness according to claim 5, characterized in that, The cavity inside the slide box (315) located at the bottom of the piston (316) is connected to the space inside the adjustment chamber (318) located at the bottom of the drive plate (319) through the bottom groove (321), and the two ends of the two connecting pipes (322) are respectively connected to the bottom of the two slide boxes (315) located on the same side of the hanging box (201).

8. A concrete slab finishing device with controllable thickness according to claim 5, characterized in that, The slide box (315) located at the bottom of the piston (316) and the adjustment cavity (318) located at the bottom of the drive plate (319) are both filled with air. The maximum volume of the cavity located at the bottom of the piston (316) inside the slide box (315) is half the maximum volume of the cavity located at the bottom of the drive plate (319) inside the adjustment cavity (318).

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