Dry-cut dust-extraction concrete cutter

Abstract

The present application relates to the technical field of cutting machine, particularly relates to a dry cutting dust collection type concrete cutting machine, which comprises a rack, a pulley block rotatably installed on one side of the rack, a positioning roller movably installed on the bottom of the rack, a sealing cover fixedly installed on one side of the rack and having a notch formed in the inside, a wind pipe detachably installed on the top of the sealing cover and having one end communicated with the notch and the other end connected with an external dust collection equipment, a cutting knife rotatably installed in the notch and partially extending outside the sealing cover, an air guide cover fixedly installed in the notch and communicated with one side of the wind pipe and shaped as a gradually tapered horn, and a flow guide assembly arranged at both ends of the air guide cover and used for avoiding dust accumulation outside the air guide cover, wherein the concrete cutting machine provided by the present application can actively cut and disturb the vortex area by rotating the rotating piece, break the stagnation state of the airflow, make the retained dust-containing gas reblend into the main adsorption flow field and accelerate its discharge.

Description

Technical Field

[0001] This invention relates to the field of cutting machine technology, and in particular to a dry-cutting, dust-collecting concrete cutting machine. Background Technology

[0002] In the fields of construction, stone processing, and metal cutting, cutting machines are widely used core processing equipment. The cutting process generates a large amount of dust and gas. This dust not only pollutes the working environment and harms the health of operators, but is also particularly problematic in the concrete construction industry. The hard, unevenly sized concrete dust particles produced during cutting can easily penetrate the precision components of the equipment, affecting operational stability. Furthermore, dust falling onto the construction surface can affect the quality of subsequent masonry and plastering processes. Therefore, equipping cutting machines with efficient dust extraction devices is crucial.

[0003] In existing technologies, dust control solutions for concrete cutting machines generally employ a "sealed protective cover + straight-hole dust suction" structure. Specifically, a sealed protective cover is installed outside the saw blade of the cutting machine to prevent concrete dust from spreading outwards. Simultaneously, circular straight holes are made in the wall (usually the top) of the sealed protective cover as air vents, which are connected to an external dust suction device via flexible air pipes. During operation, the external dust suction device generates negative pressure, drawing dust-laden gas inside the sealed protective cover into the dust suction device through the straight-hole air vents and air pipes, thus achieving dust adsorption and treatment.

[0004] While the aforementioned existing technical solutions can block and adsorb concrete dust to a certain extent, their structural design is relatively crude and poorly adapted to the characteristics of concrete dust, such as uneven particle size, easy agglomeration, and rapid diffusion. This results in many shortcomings and disadvantages in actual concrete cutting operations, leading to low dust adsorption efficiency. For example, the pores in the existing technology are straight holes without a guiding structure. The negative pressure generated by the external dust collection device can only form a local adsorption field at the entrance of the straight hole, which cannot effectively guide the randomly diffused concrete dust inside the sealed cover. Secondly, due to the limited adsorption range of the straight hole dust collection, airflow vortices and stagnation zones are easily formed on both sides of the pores on the inner wall of the sealed cover and in the gap between the cover and the saw blade, affecting the dust adsorption efficiency. Summary of the Invention

[0005] Therefore, it is necessary to provide a dry-cutting, dust-collecting concrete cutter that can improve dust adsorption efficiency to address the aforementioned technical problems.

[0006] The dry-cutting, dust-collecting concrete cutter provided by this invention includes a frame and a pulley system rotatably mounted on one side of the frame, and further includes:

[0007] The positioning roller is movably mounted on the bottom of the frame;

[0008] A sealing cover is fixedly installed on one side of the frame, and a slot is provided inside it;

[0009] The duct is detachably installed on the top of the sealing cover, with one end connected to the slot and the other end connected to an external vacuuming device;

[0010] The cutter is rotatably mounted inside the slot, with a portion extending outside the sealing cover;

[0011] An air guide shroud is fixedly installed inside the slot and is connected to one side of the air duct. Its shape is a tapered horn.

[0012] The airflow guiding components are located at both ends of the outside of the air guide cover to prevent dust from accumulating on the outside of the air guide cover.

[0013] In one embodiment, the airflow guiding assembly includes a rotating shaft that movably passes through one side of the airflow guide shroud, and a rotating cylinder is fixedly sleeved on the outer side of its end. Multiple rotating blades are fixedly installed in a ring array on the outer side of the rotating cylinder.

[0014] In one embodiment, the rotating plate has a horizontal groove at one end near the outer wall of the air guide shroud, and a plurality of rotating balls are movably installed in the horizontal groove. A rotating rod is fixedly installed through the middle of the rotating ball near the outermost side of the horizontal groove, and the other end of the rotating rod is rotatably connected to the inner wall of the horizontal groove.

[0015] In one embodiment, an L-shaped groove is provided on one side of the rotating plate, and a movable groove is provided above the L-shaped groove on the rotating plate. A pressure plate is movably disposed in the movable groove, and a plurality of sharp teeth are provided on the surface of the pressure plate facing the L-shaped groove.

[0016] In one embodiment, the rotating plate has multiple drainage holes on the lower surface of the L-shaped groove, and the drainage holes penetrate the side wall of the rotating plate away from the pressure plate.

[0017] In one embodiment, a movable plate is movably disposed within the movable groove, a limit rod is fixedly disposed at one end of the movable plate near the pressure plate, an arc-shaped groove is formed at one end of the pressure plate near the movable plate, and the end of the limit rod away from the movable plate is slidably connected to the arc-shaped groove.

[0018] In one embodiment, a round rod is rotatably installed in the movable groove, and a curved groove is formed on the outer side of the round rod. A positioning rod is fixedly installed on one end of the movable plate near the round rod, and the end of the positioning rod away from the movable plate slides and fits against the curved groove.

[0019] In one embodiment, the rotating plate is movably mounted with a crossbar on one side of the round rod, one end of the crossbar is located inside the transverse groove, and the crossbar and the round rod are connected by a belt drive.

[0020] In one embodiment, the end of the crossbar located within the transverse groove is connected to the rotating rod via a bevel gear transmission.

[0021] In one embodiment, the rotating plate has a receiving groove below the L-shaped groove, and a plurality of steel balls are movably installed in the receiving groove, with the steel balls movably abutting against the inner wall of the receiving groove.

[0022] In one embodiment, the rotating shaft is located inside the air guide shroud and is fixedly connected to multiple fan blades.

[0023] In one embodiment, baffles are fixedly installed on both sides of the bottom of the sealing cover.

[0024] The aforementioned dry-cutting, dust-collecting concrete cutter actively cuts and disturbs the vortex zone through the rotation of the rotating blades, breaking the stagnant state of the airflow and allowing the retained dust-laden gas to re-integrate into the main adsorption flow field, accelerating its discharge. The sharp teeth at the bottom of the pressure plate squeeze, pierce, and grind the large particles / clumps of dust below, breaking them into finer particles with smaller diameters. These fine dust particles are lightweight and easily suspended, and can be quickly adsorbed by the negative pressure of the air guide hood, smoothly discharged with the dust-laden gas, solving the problem of large dust particles being "unable to be sucked up but able to accumulate". When the rotating blades rotate, the steel balls in the receiving groove are subjected to the combined effects of centrifugal force, gravity, and collision force from the groove walls, causing them to roll, bounce, and collide irregularly within the groove. The vibration force generated by the collisions is transmitted to the entire rotating blade, causing the rotating blade to produce high-frequency micro-vibrations, which can quickly shake off the fine powder adhering to the surface of the blade, allowing the dust to be resuspended and then sucked away by the negative pressure of the air guide hood. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the positioning roller in this invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the sealing cover in this invention;

[0029] Figure 4 This is a schematic diagram of the air guide shroud in this invention;

[0030] Figure 5 This is a schematic diagram of the rotating cylinder in this invention;

[0031] Figure 6 This is a schematic diagram of the rotating ball in this invention;

[0032] Figure 7 for Figure 6 Enlarged diagram of part A in the middle;

[0033] Figure 8 This is a schematic diagram of the pressure plate in the present invention;

[0034] Figure 9 This is a schematic diagram of the limiting rod in this invention;

[0035] Figure 10 for Figure 9 Enlarged schematic diagram of part B in the middle.

[0036] Figure label:

[0037] 1. Frame; 2. Pulley block; 3. Positioning roller; 4. Air duct; 5. Cutter; 6. Sealing cover; 61. Groove; 7. Air guide cover; 8. Flow guide assembly; 81. Rotating shaft; 82. Rotating cylinder; 9. Rotating plate; 91. Horizontal groove; 92. L-shaped groove; 93. Movable groove; 94. Leakage hole; 95. Receiving groove; 10. Rotating ball; 11. Rotating rod; 12. Pressure plate; 121. Arc groove; 13. Pointed tooth; 14. Movable plate; 15. Limiting rod; 16. Round rod; 161. Curved groove; 17. Positioning rod; 18. Crossbar; 19. Belt; 20. Bevel gear; 21. Steel ball; 22. Fan blade; 23. Baffle. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0043] The following is combined Figures 1-10 The present invention describes a dry-cutting, dust-collecting concrete cutter.

[0044] like Figures 1-5 As shown, in one embodiment, the dry-cutting, dust-collecting concrete cutter includes a frame 1 and a pulley system 2 rotatably mounted on one side of the frame 1, and further includes:

[0045] Positioning roller 3 is movably mounted at the bottom of frame 1;

[0046] A sealing cover 6 is fixedly installed on one side of the frame 1, and a slot 61 is provided inside it;

[0047] The air duct 4 is detachably installed on the top of the sealing cover 6, with one end connected to the slot 61 and the other end connected to the external vacuuming equipment;

[0048] The cutter 5 is rotatably mounted inside the slot 61, with a portion extending outside the sealing cover 6;

[0049] The air guide shroud 7 is fixedly installed inside the slot 61 and is connected to one side of the air duct 4. Its shape is a tapered horn.

[0050] The airflow guiding components 8 are located at both ends of the outside of the air guide cover 7 to prevent dust from accumulating on the outside of the air guide cover 7.

[0051] Specifically, pulley block 2 allows operators to push frame 1 to a preset position for cutting. Frame 1 can drive components such as sealing cover 6 and cutter 5 to rotate relative to pulley block 2, adapting to concrete blocks of different thicknesses. When pulley block 2 rotates, positioning roller 3 slides laterally along the ground to adjust its position, ensuring the overall stability of frame 1. During cutting, cutter 5 rotates to cut the concrete block. Sealing cover 6 wraps around cutter 5 to prevent dust and gas generated during cutting from spreading outwards and being inhaled, affecting health. Simultaneously, external dust collection equipment is activated during the cutting process. The airflow generated by the dust collection equipment extracts the dust and gas inside sealing cover 6 through duct 4 and air guide hood 7. Air guide hood 7 is designed with a tapered, flared structure, which... As the airflow passes through, its velocity increases. According to Bernoulli's principle, the faster the velocity, the lower the local pressure, thus creating a stronger negative pressure zone at the inlet of the through hole. This stronger negative pressure can more effectively draw dust-laden gas from inside the sealing cover 6, improving adsorption efficiency. Secondly, the tapering slope can act like a funnel, guiding and converging the scattered dust-laden airflow in the slot 61 of the sealing cover 6 to the inlet of the duct 4, reducing eddies and dead zones in the airflow at the top of the sealing cover 6, allowing more dust to directly enter the pipe and preventing dust deposition. However, some dust-laden gas will still gather outside the air guide cover 7. The airflow in this area can be fluctuated by the flow guiding component 8, causing this part of the dust-laden gas to move to the opening of the air guide cover 7, accelerating its adsorption speed and preventing dust from accumulating on the outside of the air guide cover 7.

[0052] See Figures 4-6 As shown, in this embodiment, the flow guiding component 8 includes a rotating shaft 81, which movably passes through one side of the air guide shroud 7, and a rotating cylinder 82 is fixedly sleeved on the outer side of its end. Multiple rotating plates 9 are fixedly installed in a ring array on the outer side of the rotating cylinder 82.

[0053] Specifically, the rotation of the rotating shaft 81 drives the rotating cylinder 82 to rotate synchronously, and the rotating plate 9 to rotate. The rotating shaft 81 is driven by a micro motor. Although the tapered air guide 7 can accelerate the main airflow to converge towards the air hole, the leeward area outside the air guide 7 is easily blocked by the airflow adsorbed by negative pressure, which easily forms an airflow stagnation vortex area. After the dust-laden gas enters this area, it cannot be discharged with the main airflow and will stagnate and remain locally. The rotation of the rotating plate 9 can actively cut and disturb this vortex area, break the stagnation of the airflow, and allow the stagnant dust-laden gas to re-integrate into the main adsorption flow field and flow along the outside of the air guide 7 towards the air hole. This clears the discharge path of the dust-laden gas at the flow field level and reduces the "flow field resistance" of the main airflow discharge.

[0054] See Figure 6 and Figure 7 As shown, in this embodiment, a horizontal groove 91 is provided at one end of the rotating plate 9 near the outer wall of the wind guide shroud 7. A plurality of rotating balls 10 are movably installed in the horizontal groove 91. A rotating rod 11 is fixedly provided through the middle of the rotating ball 10 near the outermost side of the horizontal groove 91. The other end of the rotating rod 11 is rotatably connected to the inner wall of the horizontal groove 91.

[0055] Specifically, during concrete cutting operations, fine concrete powder and sand particles easily adhere to the outer wall of the air guide shroud 7. If the rotating plate 9 directly slides in hard contact with the outer wall, rigid sliding friction will be formed due to dust contamination. This not only results in high rotational resistance, but also easily leads to jamming of the rotating plate 9 and increased power loss. Furthermore, it will rapidly wear down the contact end of the rotating plate 9 and the outer wall of the air guide shroud 7, reducing the service life of the components. After the rotating ball 10 is embedded in the transverse groove 91 and abuts against the outer wall, the sliding friction between the rotating plate 9 and the outer wall is converted into rolling friction of the rotating ball 10. The coefficient of friction is greatly reduced. Even if dust adheres to the outer wall, it can be dispersed and carried away by the rolling of the rotating ball 10. This facilitates the adsorption of dust and avoids jamming caused by a sudden increase in frictional resistance. At the same time, it completely reduces the scraping and wear on the outer wall of the air guide shroud 7, ensuring the integrity of the external structure of the air guide shroud 7 and not affecting its airflow guiding effect.

[0056] See Figure 8 As shown, in this embodiment, an L-shaped groove 92 is provided on one side of the rotating plate 9, and an movable groove 93 is provided above the L-shaped groove 92 on the rotating plate 9. A pressure plate 12 is movably arranged in the movable groove 93, and a plurality of sharp teeth 13 are provided on the surface of the pressure plate 12 facing the L-shaped groove 92.

[0057] Specifically, the dust generated from concrete cutting contains a large amount of coarse particles and agglomerated dust. This type of dust is heavy and has poor flowability, making it difficult to be adsorbed by the negative pressure of the air guide hood 7 alone. It tends to accumulate in the leeward side of the air guide hood 7. When the rotating plate 9 rotates, the large dust particles on the outer wall of the air guide hood 7 will enter the L-shaped groove due to the scraping and driving action of the rotating plate 9. Secondly, the dust particles in the airflow will also enter the interior of the L-shaped groove 92. The large dust particles that enter the L-shaped groove slide to the bottom of the pressure plate 12. The pressure plate 12 moves up and down in the movable groove 93. The sharp teeth 13 at the bottom of the pressure plate 12 will squeeze, puncture, and grind the large dust particles / agglomerated dust below, breaking them into finer particles with smaller particle sizes. The fine dust particles are light and easy to suspend, and can be quickly adsorbed by the negative pressure of the air guide hood 7 and smoothly discharged with the dust-laden gas, solving the problem of large dust particles being "unable to be adsorbed and able to accumulate".

[0058] See Figure 5 and Figure 8 As shown, in this embodiment, the rotating plate 9 has multiple holes 94 on the lower surface of the L-shaped groove 92, and the holes 94 penetrate the side wall of the rotating plate 9 away from the pressure plate 12.

[0059] Specifically, large dust particles are broken into smaller fine particles by the sharp teeth 13 and discharged through the holes 94. Because the rotating plate 9 is always rotating, it generates centrifugal force, which throws the dust out, making it easy for the dust collection equipment to adsorb it.

[0060] See Figure 9 and Figure 10 As shown, in this embodiment, a movable plate 14 is movably disposed in the movable groove 93. A limit rod 15 is fixedly disposed on one end of the movable plate 14 near the pressure plate 12. An arc-shaped groove 121 is opened on one end of the pressure plate 12 near the movable plate 14. The end of the limit rod 15 away from the movable plate 14 is slidably connected to the arc-shaped groove 121.

[0061] Specifically, during the rotation of the rotating plate 9, the movable plate 14 moves laterally back and forth. The reciprocating movement of the movable plate 14 will drive the limit rod 15 to move laterally back and forth. During the movement of the limit rod 15, it slides along the arc groove 121 opened in the pressure plate 12, which will cause the pressure plate 12 to move up and down back and forth. The sharp teeth 13 can crush large dust particles.

[0062] See Figure 9 and Figure 10 As shown, in this embodiment, a round rod 16 is rotatably installed in the movable groove 93, and a curved groove 161 is provided on the outer side of the round rod 16. A positioning rod 17 is fixedly provided on the movable plate 14 near one end of the round rod 16, and the end of the positioning rod 17 away from the movable plate 14 is slidably attached to the curved groove 161.

[0063] Specifically, the rotation of the round rod 16 will drive the curved groove 161 to rotate, the rotation of the curved groove 161 will drive the positioning rod 17 to move laterally back and forth, and the lateral back and forth movement of the positioning rod 17 will drive the movable plate 14 to move. Through the cooperation of the limiting rod 15 and the arc groove 121, the pressure plate 12 can move up and down back and forth, which is convenient for crushing large particles of dust.

[0064] See Figures 8-10 As shown, in this embodiment, a crossbar 18 is movably installed through one side of the round rod 16 on the rotating plate 9. One end of the crossbar 18 is located inside the transverse groove 91, and the crossbar 18 and the round rod 16 are connected by a belt 19.

[0065] Specifically, the rotation of the crossbar 18 drives the round bar 16 to rotate synchronously through the transmission of the belt 19. The rotation of the round bar 16 can ultimately realize the up and down movement of the pressure plate 12, thereby crushing large dust particles.

[0066] See Figure 7 As shown, in this embodiment, the end of the crossbar 18 located in the cross groove 91 is connected to the rotating rod 11 by a bevel gear 20.

[0067] Specifically, during the rotation of the rotating plate 9, one of the rotating balls 10 will rotate on its own axis. The rotation of the rotating ball 10 will drive the rotating rod 11 to rotate. The rotating rod 11 drives the crossbar 18 to rotate synchronously through the transmission of the bevel gear 20, thereby ultimately realizing the up-and-down reciprocating movement of the pressure plate 12. In this step, the transmission of the bevel gear 20 enables the pressure plate 12 to simultaneously crush large dust particles during the rotation of the rotating plate 9, resulting in higher dust adsorption efficiency.

[0068] See Figure 8 As shown, in this embodiment, the rotating plate 9 is provided with a receiving groove 95 below the L-shaped groove 92. A plurality of steel balls 21 are movably installed in the receiving groove 95, and the steel balls 21 movably abut against the inner wall of the receiving groove 95.

[0069] Specifically, concrete powder is highly adhesive. Even if the rotating plate 9 completes the cleaning and crushing through the rotating ball 10 and the sharp teeth 13, a large amount of fine powder will still stick to the surface of the rotating plate 9. Long-term accumulation will lead to a decrease in the fit of the rotating plate 9 and structural jamming. When the rotating plate 9 rotates, the steel ball 21 in the receiving groove 95 is subjected to the combined action of centrifugal force, gravity, and groove wall collision force, and rolls, bounces and collides irregularly in the groove. The vibration force generated by the collision is transmitted to the entire rotating plate 9, causing the rotating plate 9 to produce high-frequency micro-vibration: on the one hand, it can quickly shake off the fine powder sticking to the surface of the plate, allowing the dust to be resuspended and sucked away by the negative pressure of the air guide 7; on the other hand, it can shake off the dust embedded in the gaps of the sharp teeth 13 and the horizontal groove 91, avoiding the gaps from being blocked by dust accumulation and affecting the normal movement of the rotating ball 10 and the pressure plate 12, ensuring that the functions of each structure do not fail.

[0070] See Figure 4 As shown, in this embodiment, the rotating shaft 81 is located inside the air guide shroud 7 and is fixedly connected to multiple fan blades 22.

[0071] Specifically, although the tapered structure of the air guide hood 7 can initially accelerate the suction airflow, relying solely on the passive negative pressure of the external suction device can easily lead to uneven airflow velocity and negative pressure attenuation inside the air guide hood 7 (especially in the edge area far from the air duct 4 interface), where fine dust particles are easily trapped. However, the fan blades 22, which rotate together with the rotating shaft 81, can actively enhance the airflow dynamics inside the air guide hood 7, improving the adsorption efficiency from the source. In addition, the rotation of the fan blades 22 will force the airflow inside the air guide hood 7 to flow rapidly towards the air duct 4 interface, further increasing the airflow velocity and allowing the dust-laden gas to be discharged more quickly, preventing dust from being trapped and accumulated inside the air guide hood 7.

[0072] See Figure 1 As shown, in this embodiment, baffles 23 are fixedly installed on both sides of the bottom of the sealing cover 6.

[0073] Specifically, the baffle 23 can further prevent dust-laden gas generated during the cutting process from overflowing from the sealing cover 6 and causing unnecessary harm to the human body.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A dry-cutting, dust-collecting concrete cutter, comprising a frame and a pulley system rotatably mounted on one side of the frame, characterized in that, Also includes: The positioning roller is movably mounted on the bottom of the frame; A sealing cover is fixedly installed on one side of the frame, and a slot is provided inside it; The duct is detachably installed on the top of the sealing cover, with one end connected to the slot and the other end connected to an external vacuuming device; The cutter is rotatably mounted inside the slot, with a portion extending outside the sealing cover; An air guide shroud is fixedly installed inside the slot and is connected to one side of the air duct. Its shape is a tapered horn. A flow guiding assembly is disposed at both ends of the outer side of the air guide shroud to prevent dust from accumulating on the outside of the air guide shroud. The flow guiding assembly includes a rotating shaft that movably passes through one side of the air guide shroud, and a rotating cylinder is fixedly sleeved on the outer side of its end. Multiple rotating blades are fixedly installed in a circular array on the outer side of the rotating cylinder. A horizontal groove is formed at one end of the rotating blade near the outer wall of the air guide shroud. Multiple rotating balls are movably installed in the horizontal groove. A rotating rod is fixedly installed through the middle of the rotating ball near the outermost side of the horizontal groove. The other end of the rotating rod is rotatably connected to the inner wall of the horizontal groove. An L-shaped groove is formed on one side of the rotating blade. A movable groove is formed above the L-shaped groove on the rotating blade. A pressure plate is movably disposed in the movable groove. Multiple sharp teeth are formed on the surface of the pressure plate near the L-shaped groove. Multiple leakage holes are formed on the lower surface of the rotating blade near the L-shaped groove. The leakage holes penetrate the side wall of the rotating blade away from the pressure plate.

2. The dry-cutting, dust-collecting concrete cutter according to claim 1, characterized in that, A movable plate is movably disposed within the movable groove. A limit rod is fixedly disposed on one end of the movable plate near the pressure plate. An arc-shaped groove is formed on one end of the pressure plate near the movable plate. The end of the limit rod away from the movable plate is slidably connected to the arc-shaped groove.

3. The dry-cutting, dust-collecting concrete cutter according to claim 2, characterized in that, A round rod is rotatably installed inside the movable groove. A curved groove is opened on the outer side of the round rod. A positioning rod is fixedly installed on the movable plate at one end near the round rod. The end of the positioning rod away from the movable plate slides and fits into the curved groove.

4. The dry-cutting, dust-collecting concrete cutter according to claim 3, characterized in that, The rotating plate is movably mounted with a crossbar on one side of the round rod. One end of the crossbar is located inside the horizontal groove, and the crossbar and the round rod are connected by a belt drive.

5. The dry-cutting, dust-collecting concrete cutter according to claim 4, characterized in that, The crossbar is located at one end within the horizontal groove and is connected to the rotating rod via a bevel gear transmission.

6. The dry-cutting, dust-collecting concrete cutter according to claim 1, characterized in that, The rotating plate has a receiving groove below the L-shaped groove, and multiple steel balls are movably installed in the receiving groove, with the steel balls movably abutting against the inner wall of the receiving groove.

7. The dry-cutting, dust-collecting concrete cutter according to claim 1, characterized in that, The rotating shaft is located inside the air guide cover and is fixedly connected to multiple fan blades on one side.

8. The dry-cutting, dust-collecting concrete cutter according to claim 1, characterized in that, Baffles are fixedly installed on both sides of the bottom of the sealing cover.

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