Civil engineering material cutting device

Abstract

The utility model discloses a civil engineering material cutting device relates to cutting device technical field, including the scrap collecting box, filter screen, horizontal setting in the scrap collecting box, the cavity in the scrap collecting box is divided into upper mixing area and lower separation area, transmission pipe, its exhaust end penetrates the scrap collecting box and extends to the mixing area, and the section of exhaust end close to the top wall of mixing area is constructed as the flexible part, drive source, is located the scrap collecting box outside, the utility model discloses when transmission pipe exhaust end swings to the limit position of both sides of fan -shaped track, the maximum deformation of bellows flexible part leads to the obvious reduction of through -flow cross section, and airflow velocity reduces, thereby reducing the impact force of filter screen edge. After the airflow impact mixing area side wall, the airflow diffusion covers the filter screen edge, realizes the filtering effect of the difference of the impact force of edge and central region air flow balance, guarantees the filtering even, and also protects the filter screen structure, especially fragile installation position, reaches the filtering purpose of high efficiency and durable.

Description

Technical Field

[0001] This utility model relates to the field of cutting device technology, specifically a cutting device for civil engineering materials. Background Technology

[0002] Civil engineering material cutting equipment refers to mechanical equipment used in civil engineering to cut and process various materials. This equipment is mainly used for cutting building materials such as concrete blocks, stone, and bricks to meet precise dimensional requirements during construction.

[0003] Existing methods for cleaning and absorbing debris from civil engineering cuttings rely on a fixed exhaust end design or a single airflow path. When the airflow passes through the filter, it tends to generate high impact force in the central area, while the flow rate is too low in the edge area, failing to effectively cover the entire filter surface. This uneven airflow distribution not only easily leads to clogging or reduced filtration efficiency on both sides of the filter, but also causes the edge area to bear greater impact force when the airflow velocity is high, resulting in damage to the filter edge during long-term operation. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a cutting device for civil engineering materials.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A civil engineering material cutting device, comprising:

[0007] Chip collection box;

[0008] The filter screen is horizontally installed inside the chip collection box, dividing the cavity inside the chip collection box into an upper mixing zone and a lower separation zone;

[0009] The transmission pipe has its exhaust end passing through the chip collection box and extending into the mixing zone, and the section of the exhaust end near the top wall of the mixing zone is constructed as a flexible part.

[0010] The drive source is located outside the chip collection box, and its output end is driven to the exhaust end of the transmission pipe. When the drive source is driven, the exhaust end of the transmission pipe swings in a fan shape relative to the filter screen bearing surface, and the flexible part deforms with the fan-shaped swing, so that the flow rate in the exhaust end changes dynamically.

[0011] When the exhaust end of the transmission pipe swings to the extreme positions on both sides of the fan-shaped trajectory, the airflow mixture impacts the side wall of the mixing zone to reduce the flow velocity and rebound to cover both sides of the bearing surface of the filter screen.

[0012] Preferably, the flexible part at the exhaust end of the transmission pipe is an axially expandable corrugated pipe structure, and its corrugation direction is perpendicular to the axis of the transmission pipe.

[0013] Preferably, the flow cross-sectional area of ​​the flexible part at the exhaust end of the transmission pipe when it swings to the extreme positions on both sides is 50%-70% of the flow cross-sectional area when it swings to the middle of the filter screen.

[0014] Preferably, the side wall of the mixing zone in the chip collection box is provided with an inclined rebound guide plate at the corresponding exhaust end limit position, and the inclination angle of the guide plate matches the air inflow angle.

[0015] Preferably, when the exhaust end in the transmission pipe swings to its extreme positions on both sides, the incident angle of the airflow mixture impacting the sidewall is 55°-65°.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] When the exhaust end of the transmission pipe swings to the extreme positions on both sides of the fan-shaped trajectory, the maximum deformation of the flexible part of the corrugated pipe causes a significant reduction in the flow cross-section and a decrease in airflow velocity, thereby reducing the impact force on the filter edge. After the airflow impacts the sidewall of the mixing zone, it rebounds and diffuses to cover the filter edge, achieving a filtration effect with balanced airflow between the edge and central areas but differentiated impact force. This ensures uniform filtration while protecting the filter structure, especially the vulnerable installation parts, achieving a highly efficient and durable filtration purpose. Attached Figure Description

[0018] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 For the present utility model Figure 2 Another schematic diagram of the state structure.

[0022] The diagram is labeled as follows: 1. Chip collection box; 2. Filter screen; 3. Transmission pipe; 4. Drive source; 41. Crank rocker mechanism; 5. Inclined rebound guide plate. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0024] Example

[0025] like Figures 1-3 As shown, a civil engineering material cutting device includes:

[0026] Chip collection box 1;

[0027] Filter 2 is horizontally set inside the chip collection box 1, dividing the cavity inside the chip collection box 1 into an upper mixing zone and a lower separation zone;

[0028] The transmission pipe 3 has its exhaust end penetrating through the chip collection box 1 and extending into the mixing zone, and the section of the exhaust end near the top wall of the mixing zone is constructed as a flexible part.

[0029] The drive source 4 is located outside the chip collection box 1. The drive source 4 is a rotary motor. Its output end is connected to the transmission pipe 3 through the crank rocker mechanism 41. Its output end is driven to the exhaust end of the transmission pipe 3. When the drive source 4 is driven, the exhaust end of the transmission pipe 3 swings in a fan shape relative to the bearing surface of the filter screen 2. The drive source 4 can also adopt other forms of fan-shaped swing linkage mechanism such as gear and rack meshing. The flexible part deforms with the fan-shaped swing, so that the flow rate in the exhaust end changes dynamically.

[0030] When the exhaust end of the transmission pipe 3 swings to the extreme positions on both sides of the fan-shaped trajectory, the airflow mixture impacts the side wall of the mixing zone to reduce the flow velocity and rebound to cover both sides of the bearing surface of the filter screen 2.

[0031] An air pump is installed at the bottom of the chip collection box 1. The negative pressure end of the air pump is connected to the separation zone of the chip collection box 1. The air inlet end of the transmission pipe 3 is fixedly connected to the dust collection hood facing the civil material cutting table. When the drive source 4 is started, the exhaust end of the transmission pipe 3 swings in a fan shape relative to the top of the filter screen 2. The flexible part of the exhaust end deforms with the swing, thereby dynamically changing the flow cross section. The range and deformation of the exhaust end swing affect the airflow velocity and direction. When the exhaust end swings to the extreme positions on both sides of the fan-shaped trajectory, the deformation of the flexible part is maximized, causing the flow cross section to contract and the airflow velocity to decrease. After the airflow mixture impacts the side wall of the mixing zone, it rebounds. When the airflow impacts the side wall, part of the kinetic energy is converted into pressure and turbulence, and the flow velocity is further reduced. The rebounded airflow diffuses and covers the side area of ​​the filter screen 2, achieving uniform filtration with equal but unequal impact force between the edge area and the middle area of ​​the filter screen 2, and avoiding direct impact on the installation part of the filter screen 2.

[0032] like Figure 2 As shown, the flexible part at the exhaust end of the transmission pipe 3 is an axially expandable bellows structure, with its corrugation direction perpendicular to the axis of the transmission pipe 3. When the drive source 4 drives the exhaust end to swing, the flexible part is subjected to lateral tensile force, resulting in axial compression deformation, which causes the flow cross section to shrink radially.

[0033] like Figure 3As shown, the flow cross-sectional area of ​​the flexible part at the exhaust end of the transmission pipe 3 when it swings to the extreme positions on both sides is 50%-70% of the flow cross-sectional area when it swings to the middle of the filter screen 2, so that the airflow mixture strongly impacts the middle of the filter screen 2 and weakly covers both sides of the filter screen 2.

[0034] like Figures 2-3 As shown, the mixing zone sidewall of the chip collection box 1 is equipped with an inclined rebound guide plate 5 at the corresponding exhaust end limit position, and the inclination angle of the guide plate matches the airflow injection angle. The surface of the rebound guide plate is also provided with staggered turbulence protrusions to break up the wood chip clumps in the rebound airflow. This secondary optimization of the rebound effect prevents large particles from clogging the edge of the filter screen 2 and forms a closed loop with the uniform filtration target.

[0035] like Figure 3 As shown, when the exhaust end in the transmission pipe 3 swings to the extreme positions on both sides, the incident angle of the airflow mixture impacting the side wall is 55°-65°, and after rebounding, the coverage rate of the area covering both sides of the filter screen 2 reaches more than 90%.

[0036] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A cutting device for civil engineering materials, characterized in that, include: Chip collection box (1); The filter screen (2) is horizontally set inside the chip collection box (1), dividing the cavity inside the chip collection box (1) into an upper mixing zone and a lower separation zone; The transmission pipe (3) has its exhaust end penetrating through the chip collection box (1) and extending into the mixing zone, and the section of the exhaust end near the top wall of the mixing zone is constructed as a flexible part. The drive source (4) is located outside the chip collection box (1), and its output end is connected to the exhaust end of the transmission pipe (3). When the drive source (4) is driven, the exhaust end of the transmission pipe (3) swings in a fan shape relative to the bearing surface of the filter screen (2), and the flexible part deforms with the fan-shaped swing, causing the flow rate inside the exhaust end to change dynamically. When the exhaust end of the transmission pipe (3) swings to the extreme positions on both sides of the fan-shaped trajectory, the airflow mixture impacts the side wall of the mixing zone to reduce the flow velocity and rebound to cover both sides of the bearing surface of the filter screen (2).

2. The civil engineering material cutting device according to claim 1, characterized in that: The flexible part at the exhaust end of the transmission pipe (3) is an axially expandable corrugated pipe structure, and its corrugation direction is perpendicular to the axis of the transmission pipe (3).

3. The civil engineering material cutting device according to claim 2, characterized in that: The flow cross-sectional area of ​​the flexible part at the exhaust end of the transmission pipe (3) when it swings to the extreme positions on both sides is 50%-70% of the flow cross-sectional area when it swings to the middle of the filter screen (2).

4. A civil engineering material cutting device according to claim 3, characterized in that: The mixing zone sidewall of the chip collection box (1) is provided with an inclined rebound guide plate (5) at the corresponding exhaust end limit position, and the inclination angle of the guide plate matches the air inflow angle.

5. A civil engineering material cutting device according to claim 4, characterized in that: When the exhaust end of the transmission pipe (3) swings to the extreme positions on both sides, the incident angle of the airflow mixture impacting the side wall is 55°-65°.

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