A kind of curing equipment and curing method of concrete prefabricated parts

Abstract

The present invention relates to a technical field of precast concrete parts maintenance, and specifically to a precast concrete parts maintenance equipment and maintenance method. It comprises a box body, a filter plate is fixed in the box body, a spray assembly is arranged in the box body above the filter plate, a heating pipe is fixed in the box body below the filter plate, a stepped groove with a small top and a large bottom is provided on the bottom plate of the box body, two discharge ports are provided in the horizontal direction of one side of the box body, both discharge ports are connected with one end of the stepped groove, a sealing plate detachably fixedly connected to the box body is used to seal and block the discharge port, and a cleaning assembly is arranged in the box body below the heating pipe. The present invention can automatically maintain the precast concrete parts in the box body, can ensure that the box body is in a constant temperature and constant humidity state, and can improve the maintenance effect of the precast concrete parts.

Description

Technical Field

[0001] The invention relates to the technical field of precast concrete part maintenance, and in particular to a precast concrete part maintenance device and a precast concrete part maintenance method. Background Art

[0002] In the process of producing precast concrete parts, the reason why concrete can gradually solidify and harden after being cast is mainly due to cement hydration, which requires appropriate temperature and humidity conditions. Therefore, in order to ensure that the concrete has suitable hardening conditions and can achieve qualified mechanical properties after hardening, the concrete must be cured.

[0003] In the prior art, a steam curing method is usually used, which is to heat water to gasification by burning fuel, and then pass the steam into the curing room where the precast concrete parts are placed to provide suitable temperature and humidity, thereby curing the precast concrete parts. The problem with this curing method is that it only uses steam to provide temperature and humidity during the curing process of the precast concrete parts, which is a single form and has low curing efficiency.

[0004] In the process of curing the precast concrete parts, concrete is easy to fall off the precast concrete parts. The existing precast concrete part curing equipment is large in size and it is inconvenient to clean up the fallen concrete. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a curing device and a curing method which can realize automatic curing of precast concrete parts and facilitate cleaning of concrete fallen off the precast concrete parts.

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] A maintenance device for concrete precast parts comprises a box body, a filter plate is fixed in the box body, a spray assembly is arranged in the box body above the filter plate, a heating pipe is fixed in the box body below the filter plate, a stepped groove with a small top and a large bottom is provided on the bottom plate of the box body, two discharge ports are provided in the horizontal direction of one side of the box body, both discharge ports are connected with one end of the stepped groove, a sealing plate detachably fixedly connected to the box body is used to seal and block the discharge ports, a cleaning assembly is arranged in the box body below the heating pipe, the cleaning assembly comprises a driving unit located above the stepped groove, two symmetrically arranged scraping units are installed at the lower end of the driving unit, and the driving unit can drive the scraping unit to move along the stepped groove The sweeping unit comprises a second motor, an upper slide groove is provided on the driving unit above the second motor, the length direction of the upper slide groove is perpendicular to the length direction of the step groove, the second motor is elastically slidably arranged in the upper slide groove, a lower slide block is fixed on the output shaft of the second motor, a brush rod is provided under the second motor, the bristles of the brush rod are in contact with the upper end of the bottom plate of the box body, the length direction of the brush rod is perpendicular to the length direction of the step groove, a lower slide groove is provided on the upper end of the brush rod, a damping slide rail is fixed in the lower slide groove, the lower slide block is slidably arranged in the damping slide rail, the end of the brush rod is arc-shaped, the ends of the brush rod are processed with teeth, and the teeth at the opposite ends of the two brush rods mesh with each other.

[0008] Specifically, the driving unit includes a reciprocating screw, which is rotatably arranged in a box above the step groove, a support frame is fixed outside the box, a first motor is fixed on the support frame, an output shaft of the first motor is fixedly connected to the reciprocating screw, an axial direction of the reciprocating screw is parallel to the length direction of the step groove, the reciprocating screw passes through a connecting plate, the reciprocating screw, the balls in the connecting plate and the connecting plate constitute a ball screw pair, two symmetrically arranged support plates are fixed at the lower end of the connecting plate, the length direction of the support plate is perpendicular to the length direction of the step groove, an upper slide groove is opened at the lower end of the support plate, an upper slider is fixed on the second motor, the upper slider is slidably arranged in the upper slide groove, a spring is arranged in the upper slide groove, one end of the spring is fixedly connected to the upper slider, and the other end of the spring is fixedly connected to the support plate, a sliding rod parallel to the reciprocating screw is fixed in the box, the sliding rod passes through the support plate, and the sliding rod is slidably connected to the support plate.

[0009] Specifically, the spray assembly includes multiple annular tubes, which are fixed in the box above the filter plate. Multiple nozzles are fixedly connected inside the annular tubes. The annular tubes are connected to the water supply pipe outside the box, and the water supply pipe is connected to the water pump fixed outside the box.

[0010] Specifically, a water inlet pipe and a drain pipe are fixedly connected to the box body, a first valve is installed on the water inlet pipe, and a second valve is installed on the drain pipe.

[0011] Specifically, a temperature sensor and a humidity sensor are fixed in the box, and the temperature sensor, the humidity sensor, the heating tube, the water pump and the controller are electrically connected.

[0012] Specifically, a fixing plate is fixed on the heating tube, and the fixing plate is fixedly connected to the box body.

[0013] Specifically, a cover plate is detachably and fixedly connected to the upper end of the box body, and a safety valve is installed on the upper end of the cover plate.

[0014] Specifically, an electric slide rail is fixed in the large groove at the lower end of the step groove, and two waste boxes are arranged on the sliding part of the electric slide rail. The two waste boxes are in sliding contact, and multiple clips are fixed at both ends of the sliding part of the electric slide rail. The two waste boxes are located between the multiple clips. The waste boxes can slide on the sliding part of the electric slide rail along the length direction of the step groove, and the electric slide rail can drive the two waste boxes to slide in the width direction of the step groove. The upper port of any waste box corresponds to the small groove of the step groove, and the other waste box corresponds to one of the discharge ports.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The temperature sensor, humidity sensor, heating tube, water pump and controller of the present invention are electrically connected. When the humidity in the box is lower than the humidity set in the controller, the controller can start the water pump to spray water from the nozzle, thereby increasing the humidity in the box. When the temperature in the box is lower than the temperature set in the controller, the controller can start the heating tube to increase the temperature in the box. The precast concrete parts in the box can be automatically cured, and the box can be kept in a constant temperature and humidity state, thereby improving the curing effect of the precast concrete parts.

[0017] 2. The brush rod rotates continuously and moves continuously along the length direction of the step groove to complete the work of cleaning the concrete on the bottom plate of the box into the step groove, so as to facilitate the gathering of concrete blocks on the bottom plate of the box in the step groove.

[0018] 3. The concrete blocks that enter the step trough can enter the waste box. When one of the waste boxes is filled with concrete, starting the electric slide rail can drive the waste box to move. When the other waste box corresponds to the small groove at the upper end of the step trough, the concrete can continue to be collected. At this time, the waste box that is already filled with concrete corresponds to one of the discharge ports. The sealing plate is opened, and the waste box that is already filled with concrete can be pulled out of the box body through the discharge port and the concrete in the waste box can be cleaned. After the concrete in the waste box is cleaned, the empty waste box is loaded onto the sliding part of the electric slide rail through the discharge port. By setting up two waste boxes, concrete can be collected continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0021] Figure 3 It is a cross-sectional view of the present invention.

[0022] Figure 4 for Figure 3 Magnified view of area A.

[0023] Figure 5 A schematic diagram of the cleaning assembly.

[0024] Figure 6 A schematic diagram of a scraping unit.

[0025] Figure 7 It is a top view of the electric slide rail and the waste box.

[0026] Figure 8 This is a diagram showing the position relationship between the waste bin and the discharge port.

[0027] The names of the parts in the attached drawings are:

[0028] 1. Cover plate; 2. Box body; 3. Water supply pipe; 4. First valve; 5. Water inlet pipe; 6. Drain pipe; 7. Second valve; 8. Water pump; 9. Support frame; 10. First motor; 11. Safety valve; 12. Filter plate; 13. Fixed plate; 14. Heating tube; 15. Support plate; 16. Brush rod; 17. Slide rod; 18. Reciprocating screw; 19. Humidity sensor; 20. Temperature sensor; 21. Ring pipe; 22. Nozzle; 23. Waste box; 24. Electric slide rail; 25. Clamp; 26. Second motor; 27. Step groove; 28. Discharge port; 29. ​​Closing plate; 30. Lower slide groove; 31. Connecting plate; 32. Upper slide groove; 33. Spring; 34. Lower slide block; 35. Upper slide block. DETAILED DESCRIPTION

[0029] Embodiment 1:

[0030] like Figure 1-Figure 7 As shown, a maintenance device for precast concrete parts includes a box body 2. A cover plate 1 is detachably fixedly connected to the upper end of the box body 2, and a safety valve 11 is installed on the upper end of the cover plate 1. When the pressure in the box body 2 is too high, the pressure can be released through the safety valve 11. A water inlet pipe 5 and a drain pipe 6 are fixedly connected to the box body 2. A first valve 4 is installed on the water inlet pipe 5. A second valve 7 is installed on the drain pipe 6.

[0031] A filter plate 12 is fixed in the box body 2. A spray assembly is arranged in the box body 2 above the filter plate 12.

[0032] The spray assembly includes a plurality of annular tubes 21, which are fixed in the box body 2 above the filter plate 12. A plurality of spray heads 22 are fixedly connected inside the annular tubes 21. The annular tubes 21 are connected to the water supply pipe 3 outside the box body 2, and the water supply pipe 3 is connected to the water pump 8 fixed outside the box body 2.

[0033] A heating pipe 14 is fixed in the box body 2 below the filter plate 12. A fixing plate 13 is fixed on the heating pipe 14, and the fixing plate 13 is fixedly connected to the box body 2.

[0034] A temperature sensor 20 and a humidity sensor 19 are fixed in the box body 2. The temperature sensor 20, the humidity sensor 19, the heating tube 14, the water pump 8 and the controller are electrically connected.

[0035] When the precast concrete parts are being cured, the precast concrete parts are placed on the filter plate 12. The first valve 4 is opened, and water can be added into the box body 2 through the water inlet pipe 5 to soak the precast concrete parts. The second valve 7 is opened to drain the water in the box body 2 through the drain pipe 6.

[0036] When the humidity in the box 2 is lower than the humidity set in the controller, the controller can start the water pump 8 to spray water from the nozzle 22 on the ring pipe 21, thereby increasing the humidity in the box 2. When the temperature in the box 2 is lower than the temperature set in the controller, the controller can start the heating tube 14 to increase the temperature in the box 2. The precast concrete parts in the box 2 can be automatically cured. The box 2 can be kept in a constant temperature and humidity state, and the curing effect of the precast concrete parts can be improved.

[0037] A stepped groove 27 with a small top and a large bottom is provided on the bottom plate of the box body 2. Two discharge ports 28 are provided in the horizontal direction on one side of the box body 2, and both discharge ports 28 are connected to one end of the stepped groove 27. A sealing plate 29 detachably fixedly connected to the box body 2 seals and blocks the discharge port 28. Specifically, the sealing plate 29 is connected to the box body 2 by bolts.

[0038] A cleaning assembly is arranged in the box 2 below the heating tube 14. The cleaning assembly includes a driving unit located above the stepped groove 27, and two symmetrically arranged scraping units are installed at the lower end of the driving unit. The driving unit can drive the scraping units to move along the length direction of the stepped groove 27.

[0039] The driving unit includes a reciprocating screw 18, which is rotatably arranged in the box body 2 above the stepped groove 27. A support frame 9 is fixed to the outside of the box body 2, and a first motor 10 is fixed to the support frame 9. The output shaft of the first motor 10 is fixedly connected to the reciprocating screw 18. The axial direction of the reciprocating screw 18 is parallel to the length direction of the stepped groove 27.

[0040] The reciprocating screw 18 passes through the connecting plate 31, and the reciprocating screw 18, the balls in the connecting plate 31 and the connecting plate 31 constitute a ball screw pair. Two symmetrically arranged support plates 15 are fixed to the lower end of the connecting plate 31, and the length direction of the support plates 15 is perpendicular to the length direction of the step groove 27. An upper slide groove 32 is opened at the lower end of the support plate 15, and the length direction of the upper slide groove 32 is perpendicular to the length direction of the step groove 27.

[0041] A slide bar 17 parallel to the reciprocating screw 18 is fixed in the box body 2 . The slide bar 17 passes through the support plate 15 , and the slide bar 17 is slidably connected to the support plate 15 .

[0042] The scraping unit includes a second motor 26, on which an upper slider 35 is fixed, and the upper slider 35 is slidably arranged in the upper slide groove 32. A spring 33 is arranged in the upper slide groove 32, one end of the spring 33 is fixedly connected to the upper slider 35, and the other end of the spring 33 is fixedly connected to the support plate 15.

[0043] A brush rod 16 is disposed below the second motor 26, and the bristles of the brush rod 16 are in contact with the upper end of the bottom plate of the box body 2. The length direction of the brush rod 16 is perpendicular to the length direction of the step groove 27. A lower slider 34 is fixed to the output shaft of the second motor 26. A lower slide groove 30 is provided at the upper end of the brush rod 16, a damping slide rail is fixed in the lower slide groove 30, and the lower slider 34 is slidably disposed in the damping slide rail.

[0044] The ends of the brush rods 16 are arc-shaped, and the ends of the brush rods 16 are processed with teeth, and the teeth at the opposite ends of the two brush rods 16 are meshed with each other.

[0045] During the curing of the precast concrete parts in the box 2, large pieces of concrete falling off the precast concrete parts are intercepted by the filter plate 12. Small pieces of concrete falling off the precast concrete parts fall onto the bottom plate of the box 2 through the filter plate 12.

[0046] When cleaning small pieces of concrete on the bottom plate of the box body 2, the driving unit drives the scraping unit to move along the length direction of the step groove 27, and the second motor 26 is started at the same time, and the second motor 26 drives the brush rod 16 to rotate. During the movement of the end of the brush rod 16 away from the second motor 26 toward the step groove 27, the bristles of the brush rod 16 can sweep the small pieces of concrete on the bottom plate of the box body 2 into the step groove 27. The small pieces of concrete in the step groove 27 can be discharged through the discharge port 28 by opening the sealing plate 29.

[0047] When the second motor 26 drives the brush rod 16 to rotate, the brush rod 16 moves in the length direction of the stepped groove 27, and the friction between the lower slider 34 and the damping slide rail is greater than the resistance encountered during the rotation of the brush rod 16. Before the ends of the two brush rods 16 away from the second motor 26 contact each other, the lower slider 34 and the damping slide rail will not slide relative to each other.

[0048] After the ends of the two brush rods 16 away from the second motor 26 contact each other, the teeth of the two brush rods 16 away from the second motor 26 mesh. As the second motor 26 continues to rotate, the lower slider 34 slides in the damping slide rail. After the brush rod 16 rotates 180 degrees, the length direction of the brush rod 16 is perpendicular to the length direction of the step groove 27 again, and the two ends of the brush rod 16 are reversed in the direction perpendicular to the length direction of the step groove 27.

[0049] Since the upper slider 35 fixed on the second motor 26 is slidably disposed in the upper slide groove 32, and the upper slider 35 is connected to the support plate 15 via the spring 33, when the ends of the two brush rods 16 away from the second motor 26 contact and collide with each other, the upper slider 35 can slide in the upper slide groove 32, and the spring 33 can provide shock-absorbing protection for the upper slider 35, the second motor 26, the lower slider 34 and the brush rod 16.

[0050] The brush rod 16 rotates continuously and moves along the length direction of the step groove 27 continuously to complete the work of cleaning the small pieces of concrete on the bottom plate of the box body 2 into the step groove 27 .

[0051] Embodiment 2:

[0052] Based on Example 1, refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, an electric slide rail 24 is fixed in the large groove at the lower end of the step groove 27. Two waste boxes 23 are arranged on the sliding part of the electric slide rail 24. The two waste boxes 23 are in sliding contact. A plurality of clamps 25 are fixed at both ends of the sliding part of the electric slide rail 24, and the two waste boxes 23 are located between the plurality of clamps 25. The waste boxes 23 can slide along the length direction of the step groove 27 on the sliding part of the electric slide rail 24. The electric slide rail 24 can drive the two waste boxes 23 to slide in the width direction of the step groove 27. The upper port of any waste box 23 corresponds to the small groove of the step groove 27, and the other waste box 23 corresponds to one of the discharge ports 28.

[0053] The concrete block entering the step groove 27 can enter the waste box 23 corresponding to the small groove of the step groove 27. When the waste box 23 corresponding to the small groove of the step groove 27 is filled with concrete, starting the electric slide rail 24 can drive the waste box 23 to move in the width direction of the step groove 27. When another waste box 23 corresponds to the small groove at the upper end of the step groove 27, the concrete can continue to be collected. At this time, the waste box 23 filled with concrete corresponds to one of the discharge ports 28. Open the sealing plate 29, and the waste box 23 filled with concrete can be pulled out to the outside of the box body 2 through the discharge port 28 and the concrete in the waste box 23 can be cleaned. After the concrete in the waste box 23 is cleaned, the empty waste box 23 is installed on the sliding part of the electric slide rail 24 through the discharge port 28. By setting two waste boxes 23 and the electric slide rail 24, concrete can be collected uninterruptedly. At the same time, it is convenient to centrally process the concrete.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A curing device for precast concrete parts, comprising a box (2), a filter plate (12) being fixed inside the box (2), characterized in that: A spray assembly is arranged in the box body (2) above the filter plate (12), a heating tube (14) is fixed in the box body (2) below the filter plate (12), a stepped groove (27) with a smaller top and a larger bottom is arranged on the bottom plate of the box body (2), two discharge ports (28) are arranged in the horizontal direction on one side of the box body (2), both discharge ports (28) are connected to one end of the stepped groove (27), a sealing plate (29) detachably fixedly connected to the box body (2) seals and blocks the discharge ports (28), a cleaning assembly is arranged in the box body (2) below the heating tube (14), the cleaning assembly comprises a driving unit located above the stepped groove (27), two symmetrically arranged scraping units are installed at the lower end of the driving unit, the driving unit can drive the scraping unit to move along the length direction of the stepped groove (27), the scraping unit comprises a second motor (26), a first An upper slide groove (32) is provided on the driving unit above the second motor (26), the length direction of the upper slide groove (32) is perpendicular to the length direction of the step groove (27), the second motor (26) is elastically slidably arranged in the upper slide groove (32), a lower slider (34) is fixed on the output shaft of the second motor (26), a brush rod (16) is provided below the second motor (26), the bristles of the brush rod (16) are in contact with the upper end of the bottom plate of the box body (2), the length direction of the brush rod (16) is perpendicular to the length direction of the step groove (27), a lower slide groove (30) is provided on the upper end of the brush rod (16), a damping slide rail is fixed in the lower slide groove (30), the lower slider (34) is slidably arranged in the damping slide rail, the end of the brush rod (16) is arc-shaped, the ends of the brush rod (16) are processed with teeth, and the teeth at the opposite ends of the two brush rods (16) are meshed with each other.

2. The maintenance equipment for precast concrete parts according to claim 1, characterized in that: The driving unit comprises a reciprocating screw (18), the reciprocating screw (18) is rotatably arranged in a box body (2) above the stepped groove (27), a support frame (9) is fixed on the outer side of the box body (2), a first motor (10) is fixed on the support frame (9), an output shaft of the first motor (10) is fixedly connected to the reciprocating screw (18), an axial direction of the reciprocating screw (18) is parallel to a length direction of the stepped groove (27), the reciprocating screw (18) passes through a connecting plate (31), the reciprocating screw (18), the balls in the connecting plate (31) and the connecting plate (31) form a ball screw pair, and two symmetrically arranged support plates are fixed at the lower end of the connecting plate (31) (15), the length direction of the support plate (15) is perpendicular to the length direction of the step groove (27), the upper slide groove (32) is opened at the lower end of the support plate (15), the second motor (26) is fixed with an upper slider (35), the upper slider (35) is slidably arranged in the upper slide groove (32), a spring (33) is arranged in the upper slide groove (32), one end of the spring (33) is fixedly connected to the upper slider (35), and the other end of the spring (33) is fixedly connected to the support plate (15), a slide rod (17) parallel to the reciprocating screw (18) is fixed in the box body (2), the slide rod (17) passes through the support plate (15), and the slide rod (17) is slidably connected to the support plate (15).

3. The maintenance equipment for precast concrete parts according to claim 1, characterized in that: The spray assembly comprises a plurality of annular tubes (21), the annular tubes (21) being fixed in a box body (2) above the filter plate (12), a plurality of spray heads (22) being fixedly connected to the inner side of the annular tubes (21), the annular tubes (21) being connected to a water supply pipe (3) outside the box body (2), and the water supply pipe (3) being connected to a water pump (8) fixed to the outer side of the box body (2).

4. The maintenance equipment for precast concrete parts according to claim 1, characterized in that: A water inlet pipe (5) and a drain pipe (6) are fixedly connected to the box body (2); a first valve (4) is installed on the water inlet pipe (5) and a second valve (7) is installed on the drain pipe (6).

5. The maintenance equipment for precast concrete parts according to claim 1, characterized in that: A temperature sensor (20) and a humidity sensor (19) are fixed in the box (2); the temperature sensor (20), the humidity sensor (19), the heating tube (14), the water pump (8) and the controller are electrically connected.

6. The maintenance equipment for precast concrete parts according to claim 1, characterized in that: A fixing plate (13) is fixed on the heating tube (14), and the fixing plate (13) is fixedly connected to the box body (2).

7. The maintenance equipment for precast concrete parts according to claim 1, characterized in that: The upper end of the box body (2) is detachably and fixedly connected to a cover plate (1), and a safety valve (11) is installed on the upper end of the cover plate (1).

8. The maintenance equipment for precast concrete parts according to claim 1, characterized in that: An electric slide rail (24) is fixed in the large groove at the lower end of the step groove (27), and two waste boxes (23) are arranged on the sliding part of the electric slide rail (24). The two waste boxes (23) are in sliding contact with each other. A plurality of clamps (25) are fixed at both ends of the sliding part of the electric slide rail (24), and the two waste boxes (23) are located between the plurality of clamps (25). The waste boxes (23) can slide on the sliding part of the electric slide rail (24) along the length direction of the step groove (27), and the electric slide rail (24) can drive the two waste boxes (23) to slide in the width direction of the step groove (27). The upper port of any waste box (23) corresponds to the small groove of the step groove (27), and the other waste box (23) corresponds to one of the discharge ports (28).

9. A method for curing precast concrete parts based on the curing equipment for precast concrete parts according to claim 1, characterized in that: Placing the concrete prefabricated part on a filter plate (12) in a box (2), raising the temperature in the box (2) by means of a heating pipe (14), and raising the humidity in the box (2) by means of a spraying assembly; During the curing process of the precast concrete parts in the box (2), large pieces of concrete falling off the precast concrete parts are intercepted by the filter plate (12), and small pieces of concrete falling off the precast concrete parts pass through the filter plate (12) and fall onto the bottom plate of the box (2); When cleaning small pieces of concrete on the bottom plate of the box body (2), the drive unit drives the scraping unit to move along the length direction of the step groove (27), and at the same time the second motor (26) is started, and the second motor (26) drives the brush rod (16) to rotate. During the movement of the end of the brush rod (16) away from the second motor (26) in the direction of the step groove (27), the bristles of the brush rod (16) can sweep the small pieces of concrete on the bottom plate of the box body (2) into the step groove (27), and the sealing plate (29) can be opened to discharge the small pieces of concrete in the step groove (27) through the discharge port (28); When the second motor (26) drives the brush rod (16) to rotate, the brush rod (16) moves in the length direction of the stepped groove (27), and the friction force between the lower slider (34) and the damping slide rail is greater than the resistance encountered by the brush rod (16) during the rotation process; After the ends of the two brush rods (16) away from the second motor (26) contact each other, the teeth of the ends of the two brush rods (16) away from the second motor (26) mesh, and as the second motor (26) continues to rotate, the lower slider (34) slides in the damping slide rail, and after the brush rod (16) rotates 180 degrees, the length direction of the brush rod (16) is perpendicular to the length direction of the step groove (27) again, and the two ends of the brush rod (16) are reversed in a direction perpendicular to the length direction of the step groove (27); The brush rod (16) continuously rotates and continuously moves along the length direction of the step groove (27) to complete the work of cleaning the small pieces of concrete on the bottom plate of the box body (2) into the step groove (27).

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