Concrete block cutting device and method for building

Abstract

The invention belongs to the field of concrete cutting, and discloses a building concrete block cutting device and method.The building concrete block cutting device comprises a rotary cutter body, an elastic cushion and an impeller assembly; when the cutting edge part cuts into the light porous concrete slab, chippings generated by cutting of the cutting edge part enter the bottom of the cavity under the action of the rotating force of the rotating cutter and are attached to the surface of the impeller; when the cutting edge part is separated from the surface of concrete, the impeller assembly rotates along with the rotary cutter body, chippings attached to the surface of the impeller are directionally guided into bubble holes exposed in the surface of a concrete slab, and the chippings are separated from the concrete slab through a relatively sealed cavity defined by the flow guide cushion body, the surface of the concrete, the cutting edge part and the elastic cushion. After the angle between the rotary cutter body and a concrete slab is changed, chippings generated by cutting can be cast when the impeller rotates, the casting axis of the impeller is always perpendicular to the center line of a bubble hole, and self-adaptive matching of the vector direction of chipping flow and a bubble space is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of concrete cutting, and in particular relates to a device and method for cutting concrete blocks for construction. Background Art

[0002] Lightweight porous concrete blocks have been widely used in building envelope structures and decoration projects in recent years due to their light weight, excellent heat insulation and sound insulation performance. Traditional cutting processes mostly use mechanical sawing, water jet cutting and other methods. However, since the inside of lightweight porous concrete blocks is a porous honeycomb structure, after cutting, the bubbles on the cutting surface burst and form an irregular honeycomb section, which makes the surface uneven during the subsequent spraying process, thus affecting the appearance;

[0003] Existing devices, such as the rotary blade cutting equipment with application number JP7007038B2 and the cutting method of lightweight porous concrete slabs, utilize a unique blade geometry design (semi-circular blade tip + negative back angle) and cutting process optimization to allow the cut debris to fill the bubbles on the concrete surface, thereby increasing the smoothness of the concrete surface after cutting. However, when the angle between the rotary blade body and the concrete slab changes during cutting of the curved surface, the flow direction of the cutting debris is complex, and it is difficult to send the debris into the bubbles by gravity alone. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a device and method for cutting concrete blocks for construction, which solves the problem in the prior art that when the angle between the rotating blade body and the concrete slab changes when cutting the curved surface, the flow direction of the cutting debris is complicated, and it is difficult to send the debris into the bubble only by gravity.

[0005] The purpose of this disclosure can be achieved through the following technical solutions:

[0006] A construction concrete block cutting device and method, comprising: a rotating cutter body, an elastic cushion and an impeller assembly;

[0007] The outer circumference of the rotating knife body is evenly spaced with a plurality of folding blades, and a cutting edge is formed at the distal end of each folding blade;

[0008] The inner side of the cutting edge portion is fixedly connected with an impeller assembly, and the side of the impeller assembly facing away from the cutting edge portion is provided with a flow guide pad body, and the flow guide pad body is made of elastic rubber material;

[0009] When the cutting edge cuts into the lightweight porous concrete slab, the guide pad body first contacts the concrete surface and generates elastic deformation, and the end of the guide pad body bends toward the impeller assembly to form a relatively sealed chamber enclosed by the guide pad body, the concrete surface, the cutting edge and the elastic soft pad;

[0010] The debris generated by the cutting edge enters the bottom of the chamber under the action of the rotating force of the rotating knife and adheres to the surface of the impeller;

[0011] When the cutting edge is separated from the concrete surface, the impeller assembly rotates with the rotating cutter body to direct the debris attached to the impeller surface into the air bubble pores exposed on the surface of the concrete slab.

[0012] In some disclosures, the cross section of the folding blade is an orthogonal bending structure, and the side of the folding blade facing the rotation center of the bend is an inner folding surface, and a storage box is fixed to the inner folding surface of the folding blade.

[0013] In some disclosures, a discharge hole penetrating the storage box is provided at the bottom of the storage box, and an opening and closing component is provided at the upper end of the discharge hole.

[0014] In some disclosures, the opening and closing assembly includes a support rod, a blocking ball, a return spring and a telescopic rod, the telescopic rod is fixed to the inner side of the storage box, and the support rod is fixed to one end of the telescopic rod close to the discharge hole, the return spring is fixed to the outer side of the telescopic rod, and a blocking ball is fixed to one end of the support rod away from the telescopic rod, and the diameter of the blocking ball is larger than the diameter of the discharge hole.

[0015] In some disclosures, the cutting edge portion, the guide pad body and the elastic soft pad together constitute a circumferential enclosure structure, and the enclosure structure forms an enclosing space along the rotation axis direction of the impeller assembly. A support frame is fixed to the lower end surface of the storage box, and a sliding groove penetrating the support frame is provided on the inner side of the support frame, and the position of the support frame corresponds to the position of the discharge hole.

[0016] In some disclosures, the impeller assembly includes an orthogonal rod, an impeller and a rope groove, an orthogonal rod is fixed to the end of the blocking ball away from the support rod, and the end of the orthogonal rod passes through a sliding groove, the outer side of the orthogonal rod is rotatably connected to the impeller, and a rope groove is provided at the end of the impeller away from the blocking ball, and the moving path of the impeller assembly is the same as the path of the sliding groove.

[0017] In some disclosures, a fixing block is fixed to one side of the bottom of the guide pad body close to the impeller, and two ends of the connecting rope are respectively connected to the fixing block and the rope groove.

[0018] In some disclosures, a spring rope is fixed to a side of the guide pad body away from the impeller, and an upper end of the spring rope is fixed to a side of the storage box away from the folding blade.

[0019] In some disclosures, a feed port is provided on a side of the storage box close to the guide pad body, and the feed port is located at the upper end of the guide pad body, a spring rope is fixed to a side of the guide pad body away from the impeller, and the upper end of the spring rope is fixed to a side of the storage box away from the folding blade, a baffle is fixed to the inner bottom of the storage box, and the position of the baffle corresponds to the position of the feed port, and the baffle forms an acute angle of 55°-65° with the bottom surface of the storage box.

[0020] A method for cutting a building concrete block comprises the following steps:

[0021] S1, start the servo motor connected to the rotating knife body and drive the folding blade to rotate;

[0022] S2. Before the folding blade contacts the concrete slab, the guide pad body corresponding to the folding blade bends toward the side close to the impeller, and the impeller contacts the concrete slab during the rotation;

[0023] S3, at this time, the impeller drives the orthogonal rod and the blocking ball to move along the sliding groove toward the end away from the discharge hole, and compresses the return spring upward, so that the blocking ball is separated from the discharge hole, and the concrete powder in the storage box is thrown out from the discharge hole due to the centrifugal force of the rotating knife body when it rotates;

[0024] S4, at this time, the debris thrown out of the storage box and the debris cut off by the cutting edge are stored in a relatively sealed chamber formed by the cutting edge part, the guide pad body and the elastic soft pad;

[0025] S5. When the impeller is separated from the surface of the concrete slab, the impeller continues to rotate due to the influence of rotational inertia, and the connecting rope is wound in the rope groove, and the spring rope is driven to deform downward, and at the same time, the reset spring is elastically restored, so that the blocking ball is blocked in the discharge hole again;

[0026] S6. After the inertial force of the impeller rotation is less than the elastic restoring force of the spring rope, the spring rope and the guide pad body recover elastically and drive the impeller to reverse through the connecting rope, so that the debris and concrete powder on the impeller surface are thrown into the bubbles through centrifugal force, thereby filling the bubbles.

[0027] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0028] A fixed connection is one where the parts or components are fixed without any relative movement;

[0029] A rotational connection is a connection between parts that allows the parts to rotate relative to each other;

[0030] Threaded connection is a detachable fixed connection with the advantages of simple structure, reliable connection, and convenient assembly and disassembly. It is widely used in the fields of mechanical engineering and connection structures.

[0031] A sliding connection is a connection between parts that allows the parts to slide against each other.

[0032] Beneficial effects of the present disclosure:

[0033] 1. A relatively sealed chamber is formed by setting a guide pad body, a concrete surface, a cutting edge and an elastic soft pad. After changing the angle between the rotating blade body and the concrete slab, the debris generated by cutting can be ejected when the impeller rotates, and the impeller ejection axis is always perpendicular to the center line of the bubble pore, so as to achieve adaptive matching between the debris flow vector direction and the bubble space.

[0034] 2. When the bubbles in the lightweight porous concrete slab are unevenly distributed, concrete powder is provided in the storage box, and the concrete powder is sealed and opened through the opening and closing component. The opening and closing component can be triggered to open and the powder can be thrown into the bubbles when the folding blade contacts the concrete slab. The contact triggering ensures that the powder release is strictly synchronized with the cutting process, and realizes the precise matching of the powder release window period and the bubble exposure stage, which is conducive to reducing the waste of concrete powder. In addition, the concrete powder in the storage box can be supplemented when the bubble size is uneven, so as to reduce the bubbles that are not completely filled locally. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present disclosure;

[0037] Figure 2 This is an embodiment of the present disclosure Figure 1 The enlarged structural diagram at A in the middle;

[0038] Figure 3 is a schematic diagram of the overall structure of the trigger component of an embodiment of the present disclosure;

[0039] Figure 4 is a schematic diagram of the connection structure between the opening and closing assembly and the impeller assembly of an embodiment of the present disclosure;

[0040] Figure 5 is a schematic diagram of the internal structure of a storage box according to an embodiment of the present disclosure;

[0041] Figure 6 It is a schematic diagram of the overall structure of the impeller assembly of an embodiment of the present disclosure.

[0042] In the figure: 1. rotating knife body; 2. guide pad body; 21. fixing block; 22. spring rope; 3. folding blade; 31. cutting edge; 4. storage box; 41. discharge hole; 42. feed port; 43. baffle; 5. opening and closing assembly; 51. support rod; 52. blocking ball; 53. reset spring; 54. telescopic rod; 6. impeller assembly; 61. orthogonal rod; 62. impeller; 63. rope groove; 7. elastic cushion; 8. support frame; 81. sliding groove; 9. connecting rope. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0044] Please refer to Figures 1 to 6 , a construction concrete block cutting device, comprising: a rotating cutter body 1, an elastic cushion 7 and an impeller assembly 6;

[0045] A plurality of folding blades 3 are evenly spaced on the outer periphery of the rotary knife body 1, and a cutting edge portion 31 is formed at the distal end of each folding blade 3;

[0046] The inner side of the cutting edge portion 31 is fixedly connected with an impeller assembly 6, and a flow guide pad 2 is provided on the side of the impeller assembly 6 facing away from the cutting edge portion 31. The flow guide pad 2 is made of elastic rubber material;

[0047] When the cutting edge 31 cuts into the lightweight porous concrete slab, the guide pad body 2 first contacts the concrete surface and generates elastic deformation, and the end of the guide pad body 2 bends toward the impeller assembly 6, forming a relatively sealed chamber enclosed by the guide pad body 2, the concrete surface, the cutting edge 31 and the elastic soft pad 7.

[0048] The debris generated by the cutting edge 31 enters the bottom of the chamber under the action of the rotating force of the rotating knife and adheres to the surface of the impeller 62;

[0049] When the cutting edge portion 31 is separated from the concrete surface, the impeller assembly 6 rotates with the rotary cutter body 1, and the debris attached to the surface of the impeller 62 is directed into the air bubble pores exposed on the surface of the concrete slab.

[0050] When cutting, the rotating blade body 1 cuts into the lightweight porous concrete slab at an inclined angle. At this time, the guide pad body 2 first contacts the concrete surface, and the guide pad body 2 is blocked by the friction force with the concrete surface and bends to the side close to the impeller assembly 6. At this time, the outer surface of the guide pad fits the surface of the concrete slab, and an elastic cushion 7 is fixed between the cutting edge portion 31 and the guide pad body 2. The cutting edge portion 31, the guide pad body 2 and the elastic cushion 7 form a circumferential enclosure structure on the outside of the impeller assembly 6. When the rotating blade body 1 cuts into the concrete slab in a vertical direction, the bubbles on the concrete surface and the cutting blade portion are not in the same vertical plane, so that the flow direction of the debris becomes The concrete surface of the impeller assembly 6 is complex and difficult to be filled into the bubble smoothly by its own gravity and cutting force. The enclosed structure formed by the cutting edge 31, the guide pad 2 and the elastic soft pad 7 can temporarily concentrate the debris on the outer surface of the impeller assembly 6. When the rotary knife body 1 continues to rotate, the impeller assembly 6 is separated from the concrete surface. At this time, the friction between the impeller assembly 6 and the concrete drives the impeller assembly 6 to rotate. At this time, the position of the impeller assembly 6 corresponds to the position of the bubble. The tangential direction of the centrifugal force when the impeller assembly 6 rotates is in the same plane as the bubble, so that the debris enters the bubble accurately along the tangential direction under the action of the centrifugal force, thereby realizing the filling of the debris into the bubble during the inclined cutting process.

[0051] Please refer to Figure 1 to Figure 2 The cross section of the folding blade 3 is an orthogonal bending structure, and the side of the folding blade 3 facing the rotation center of the bend is the inner folding surface, and the inner folding surface of the folding blade 3 is fixed with a storage box 4. When in use, the storage box 4 is fixed to the side of the folding blade 3 close to the inner folding surface, and a gap is left between the bottom surface of the storage box 4 and the end of the cutting edge portion 31, so that when the cutting edge portion 31 rotates, there is no motion interference with the storage box 4, and the inner side of the storage box 4 is filled with concrete powder. When the volume of the bubble is large, when the cut debris enters the bubble with a large bubble, it is easy to cause partial incomplete filling. By filling the concrete powder in the storage box 4 in advance, the partially incompletely filled bubbles can be supplemented to improve the flatness of the larger bubble.

[0052] A discharge hole 41 penetrating the storage box 4 is formed at the bottom of the storage box 4 , and an opening and closing assembly 5 is disposed at the upper end of the discharge hole 41 .

[0053] Please refer to Figure 3 and Figure 6The opening and closing assembly 5 includes a support rod 51, a blocking ball 52, a return spring 53 and a telescopic rod 54. The telescopic rod 54 is fixed to the inner side of the storage box 4, and the end of the telescopic rod 54 close to the discharge hole 41 is fixed to the support rod 51, the outer side of the telescopic rod 54 is fixed to the return spring 53, and the end of the support rod 51 away from the telescopic rod 54 is fixed to the blocking ball 52, and the diameter of the blocking ball 52 is greater than the diameter of the discharge hole 41. When the return spring 53 is in the original length state, the blocking ball 52 is located on the inner side of the discharge hole 41 and blocks the discharge hole 41, so that the inner side of the storage box 4 is in a sealed state at this time, which is conducive to the blocking ball 52 being against the discharge hole 41 during the rotation of the rotary cutter body 1, so as to prevent the concrete powder in the storage box 4 from spilling out and causing waste.

[0054] Please refer to Figure 1 and Figure 2 The cutting edge portion 31, the guide pad body 2 and the elastic soft pad 7 together form a circumferential enclosure structure, which forms a covering space along the rotation axis direction of the impeller assembly 6. A support frame 8 is fixed to the lower end surface of the storage box 4, and a sliding groove 81 penetrating the support frame 8 is opened on the inner side of the support frame 8, and the position of the support frame 8 corresponds to the position of the discharge hole 41. When in use, the impeller assembly 6 is installed on the inner side of the support frame 8. At this time, the impeller assembly 6 and the support frame 8 are located in a relatively sealed chamber enclosed by the guide pad body 2, the concrete surface, the cutting edge portion 31 and the elastic soft pad 7, thereby reducing the loss of cutting debris.

[0055] Please refer to Figure 4 and Figure 6 The impeller assembly 6 includes an orthogonal rod 61, an impeller 62 and a rope groove 63. The orthogonal rod 61 is fixed to the end of the blocking ball 52 away from the support rod 51, and the end of the orthogonal rod 61 passes through the sliding groove 81. The outer side of the orthogonal rod 61 is rotatably connected to the impeller 62, and a rope groove 63 is provided at the end of the impeller 62 away from the blocking ball 52, and the moving path of the impeller assembly 6 is the same as the path of the sliding groove 81.

[0056] The lowest end of the impeller 62 is parallel to the cutting edge. When the folding blade 3 on the outside of the impeller assembly 6 cuts the concrete slab, the impeller 62 is in direct contact with the concrete slab, and drives the impeller 62, the orthogonal rod 61 and the blocking ball 52 to move along the sliding groove 81 to the end away from the discharge hole 41, and compresses the reset spring 53 upward. At this time, the opening and closing assembly 5 is separated from the discharge hole 41, so that the bottom of the storage box 4 is opened, and the concrete powder in the storage box 4 is driven by the centrifugal force of the rotation of the rotating knife body 1 to be thrown out from the discharge hole 41, so that the powder in the storage box 4 is thrown out when it is close to the bubble. The contact trigger ensures that the powder release is strictly synchronized with the cutting process, and realizes the precise matching of the powder release window period and the bubble exposure stage, which is conducive to reducing the waste of concrete powder.

[0057] At the same time, when the impeller 62 is separated from the concrete surface, the friction between the impeller 62 and the concrete drives the impeller 62 to rotate, thereby winding the connecting rope 9 around the outside of the rope groove 63, and driving the guide pad body 2 to bend toward the end close to the impeller 62. After the inertial force of the impeller 62 is weakened, the guide pad body 2 rebounds quickly, and drives the connecting rope 9 to move outward and drive the impeller 62 to reverse, so that the debris and concrete powder remaining on the outside of the impeller 62 are thrown into the bubble by centrifugal force. When the cutting surface of the concrete is an arc, the angle between the folding blade 3 and the material changes dynamically, while the position of the impeller 62 and the folding blade 3 is relatively fixed, so that when the angle of the blade changes dynamically, the impeller 62 can change with the blade, and after the change, the position of the impeller 62 corresponds to the bubble, so that when the flow direction of the debris is complex, the impeller 62 ejection axis is always perpendicular to the center line of the bubble pore, so as to achieve adaptive matching between the debris flow vector direction and the pore space.

[0058] Please refer to Figures 2 to 4 A fixing block 21 is fixed to the bottom of the guide pad body 2 near the impeller 62, and the two ends of the connecting rope 9 are respectively connected to the fixing block 21 and the rope groove 63. When in use, the two ends of the connecting rope 9 are respectively connected to the guide pad body 2 and the impeller 62. When the guide pad body 2 bends toward the side close to the impeller assembly 6, the connecting rope 9 is in a relaxed state. At this time, the impeller 62 rotates to conveniently wrap the connecting rope 9 around the outside of the impeller 62. When the folding blade 3 is cut and separated from the concrete slab, the guide pad body 2 is elastically restored, and the elastic restoring force is used to provide energy reserve for the impeller 62 debris ejection. In addition, in a humid condition, the debris is easily adsorbed on the outside of the guide pad body 2, and the debris can be thrown out through the repeated deformation of the guide pad body 2.

[0059] Please refer to Figures 2 to 4 A spring rope 22 is fixed to the side of the guide pad body 2 away from the impeller 62, and the upper end of the spring rope 22 is fixed to the side of the storage box 4 away from the folding blade 3. When the guide pad body 2 bends toward the side close to the impeller 62, the spring rope 22 is driven to stretch downward. After the guide pad body 2 is separated from the concrete slab, the spring rope 2 elastically recovers and drives the guide pad body 2 to move toward the side away from the impeller 62, thereby assisting the guide pad body 2 to recover and improving the stability of the movement of the guide pad body 2.

[0060] Please refer to Figure 6A feed port 42 is provided on one side of the storage box 4 close to the guide pad body 2, and the feed port 42 is located at the upper end of the guide pad body 2. When the impeller 62 rotates, a portion of the debris is driven by the airflow generated by the rotation of the impeller 62 to enter the storage box 4 from the feed port 42 along the inner wall of the guide pad body 2, thereby collecting the debris, which is conducive to collecting the debris around the impeller 62 into the storage box 4, so that the debris in the storage box 4 can be replenished, which is conducive to reducing the frequency of replenishing the debris in the storage box 4.

[0061] Please refer to Figure 6 A baffle 43 is fixed to the inner bottom of the storage box 4 , and the position of the baffle 43 corresponds to the position of the feed port 42 , and the baffle 43 and the bottom surface of the storage box 4 form an acute angle of 55°-65°. The upper end of the baffle 43 forms a funnel-shaped outlet with the inner wall of the storage box 4, and the bottom of the storage box 4 is divided into two spaces by the baffle 43. The upper end of the space near the feed port 42 of the baffle 43 is in the shape of a narrow funnel, so that the concrete powder originally placed in the storage box 4 and the debris cut off can be separated by the baffle 43. Since the position of the feed port 42 is relatively low, it is beneficial to reduce the concrete powder being thrown out from the feed port 42 during the rotation of the rotating knife body 1. At the same time, the upper end of the baffle 43 is provided with a funnel shape, so that when the rotating knife stops rotating, the debris on the side of the baffle 43 near the feed port 42 passes through the upper end of the baffle 43 under the influence of gravity and mixes with the concrete powder. The funnel-shaped structure makes it less likely that the mixed debris will re-enter the space on the side of the baffle 43 near the feed port 42.

[0062] The following is a further description of a construction concrete block cutting device and method provided by the present invention in conjunction with the accompanying drawings and implementation modes.

[0063] S1, start the servo motor connected to the rotating knife body 1, and drive the folding blade 3 to rotate;

[0064] S2, before the folding blade 3 contacts the concrete slab, the guide pad body 2 corresponding to the folding blade bends toward the side close to the impeller 62, and the impeller 62 contacts the concrete slab during the rotation;

[0065] S3, at this time, the impeller 62 drives the orthogonal rod 61 and the blocking ball 52 to move along the sliding groove 81 toward the end away from the discharge hole 41, and compresses the return spring 53 upward, so that the blocking ball 52 is separated from the discharge hole 41, and the concrete powder in the storage box 4 is affected by the centrifugal force of the rotating knife body 1 when it rotates, and is thrown out from the discharge hole 41;

[0066] S4, at this time, the debris thrown out of the storage box 4 and the debris cut by the cutting edge are stored in a relatively sealed chamber formed by the cutting edge portion 31, the guide pad body 2 and the elastic soft pad 7;

[0067] S5. When the impeller 62 separates from the surface of the concrete slab, the impeller 62 continues to rotate due to the influence of rotational inertia, and winds the connecting rope 9 into the rope groove 63, and drives the spring rope 22 to deform downward, and at the same time, the reset spring 53 elastically recovers, so that the blocking ball 52 blocks the discharge hole 41 again;

[0068] S6. After the inertial force of the impeller 62 is less than the elastic restoring force of the spring rope 22, the spring rope 22 and the guide pad body 2 recover elastically and drive the impeller 62 to reverse through the connecting rope 9, so that the debris and concrete powder on the surface of the impeller 62 are thrown into the bubbles by centrifugal force, thereby filling the bubbles.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure may have various changes and improvements, and these changes and improvements fall within the scope of the present disclosure to be protected.

Claims

1. A construction concrete block cutting device, characterized in that: include: A rotating blade body (1), an elastic cushion (7) and an impeller assembly (6); A plurality of folding blades (3) are evenly spaced on the outer circumference of the rotating knife body (1), and a cutting edge portion (31) is formed at the distal end of each folding blade (3); An impeller assembly (6) is fixedly connected to the inner side of the cutting edge portion (31); a flow guide pad body (2) is provided on the side of the impeller assembly (6) facing away from the cutting edge portion (31); and the flow guide pad body (2) is made of elastic rubber material; When the cutting edge portion (31) cuts into the lightweight porous concrete slab, the guide pad body (2) first contacts the concrete surface and generates elastic deformation, and the end of the guide pad body (2) bends toward the impeller assembly (6), forming a relatively sealed chamber enclosed by the guide pad body (2), the concrete surface, the cutting edge portion (31) and the elastic soft pad (7); The debris generated by the cutting edge portion (31) enters the bottom of the chamber under the action of the rotating force of the rotating blade and adheres to the surface of the impeller (62); when the cutting edge portion (31) is separated from the concrete surface, the impeller assembly (6) rotates with the rotating blade body (1) to guide the debris attached to the surface of the impeller (62) into the air bubble pores exposed on the surface of the concrete slab.

2. A construction concrete block cutting device according to claim 1, characterized in that: The cross section of the folding blade (3) is an orthogonal bending structure, and the side of the folding blade (3) facing the bending rotation center is an inner folding surface, and a storage box (4) is fixed to the inner folding surface of the folding blade (3).

3. A construction concrete block cutting device according to claim 2, characterized in that: The bottom of the storage box (4) is provided with a discharge hole (41) penetrating the storage box (4), and an opening and closing component (5) is arranged at the upper end of the discharge hole (41).

4. A construction concrete block cutting device according to claim 3, characterized in that: The opening and closing assembly (5) comprises a support rod (51), a blocking ball (52), a return spring (53) and a telescopic rod (54); the telescopic rod (54) is fixed on the inner side of the storage box (4); the support rod (51) is fixed on one end of the telescopic rod (54) close to the discharge hole (41); the return spring (53) is fixed on the outer side of the telescopic rod (54); the blocking ball (52) is fixed on one end of the support rod (51) away from the telescopic rod (54); and the diameter of the blocking ball (52) is greater than the diameter of the discharge hole (41).

5. A construction concrete block cutting device according to claim 3, characterized in that: The cutting edge portion (31), the guide pad body (2) and the elastic soft pad (7) together constitute a circumferential enclosure structure, and the enclosure structure forms a covering space along the rotation axis direction of the impeller assembly (6). A support frame (8) is fixed to the lower end surface of the storage box (4), and a sliding groove (81) penetrating the support frame (8) is provided on the inner side of the support frame (8), and the position of the support frame (8) corresponds to the position of the discharge hole (41).

6. A construction concrete block cutting device according to claim 4, characterized in that: The impeller assembly (6) comprises an orthogonal rod (61), an impeller (62) and a rope groove (63); the orthogonal rod (61) is fixed to one end of the blocking ball (52) away from the support rod (51), and the end of the orthogonal rod (61) passes through a sliding groove (81); the outer side of the orthogonal rod (61) is rotatably connected to the impeller (62), and the end of the impeller (62) away from the blocking ball (52) is provided with a rope groove (63); and the moving path of the impeller assembly (6) is the same as the path of the sliding groove (81).

7. A construction concrete block cutting device according to claim 5, characterized in that: A fixing block (21) is fixed to one side of the bottom of the guide pad body (2) close to the impeller (62), and two ends of the connecting rope (9) are respectively connected to the fixing block (21) and the rope groove (63).

8. A construction concrete block cutting device according to claim 7, characterized in that: A spring rope (22) is fixed to the side of the guide pad body (2) away from the impeller (62), and the upper end of the spring rope (22) is fixed to the side of the storage box (4) away from the folding blade (3).

9. A construction concrete block cutting device according to claim 8, characterized in that: A feed port (42) is provided on a side of the storage box (4) close to the flow guide pad body (2), and the feed port (42) is located at the upper end of the flow guide pad body (2). A spring rope (22) is fixed on a side of the flow guide pad body (2) away from the impeller (62), and the upper end of the spring rope (22) is fixed on a side of the storage box (4) away from the folding blade (3). A baffle (43) is fixed on the inner bottom of the storage box (4), and the position of the baffle (43) corresponds to the position of the feed port (42), and the baffle (43) forms an acute angle of 55°-65° with the bottom surface of the storage box (4).

10. A method for cutting a concrete block for construction, using a device for cutting a concrete block for construction as claimed in any one of claims 1 to 9, characterized in that: The following steps are included: S1, starting the servo motor connected to the rotating knife body (1) and driving the folding blade (3) to rotate; S2, before the folding blade (3) contacts the concrete slab, the guide pad body (2) corresponding to the folding blade bends toward the side close to the impeller (62), and the impeller (62) contacts the concrete slab during the rotation process; S3, at this time, the impeller (62) drives the orthogonal rod (61) and the blocking ball (52) to move along the sliding groove (81) toward the end away from the discharge hole (41), and compresses the return spring (53) upward, so that the blocking ball (52) is separated from the discharge hole (41), and the concrete powder in the storage box (4) is affected by the centrifugal force of the rotating knife body (1) when it rotates and is thrown out from the discharge hole (41); S4, at this time, the debris thrown out of the storage box (4) and the debris cut off by the cutting edge are stored in a relatively sealed chamber formed by the cutting edge portion (31), the flow guide pad body (2) and the elastic soft pad (7); S5. When the impeller (62) is separated from the surface of the concrete slab, the impeller (62) continues to rotate due to the influence of rotational inertia, and winds the connecting rope (9) into the rope groove (63), driving the spring rope (22) to deform downward, and at the same time the return spring (53) elastically recovers, so that the blocking ball (52) is blocked in the discharge hole (41) again; S6. After the inertial force of the impeller (62) rotating is less than the elastic restoring force of the spring rope (22), the spring rope (22) and the guide pad body (2) elastically restore and drive the impeller (62) to reverse through the connecting rope (9), thereby throwing the debris and concrete powder on the surface of the impeller (62) into the air bubbles through the centrifugal force, thereby filling the air bubbles.

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