Concrete column chamfer polishing dust collection device

Abstract

The utility model discloses a concrete column chamfer polishes dust collection device belongs to building construction equipment technical field, and this device includes polisher casing, connecting pipe and cambered surface sealing assembly, the cambered surface sealing assembly includes the fairing of the telescopic link and universal joint with polisher casing connection, and the fairing opening edge is equipped with sealing skirt and brush seal ring from outside to inside, and its top air outlet is communicated with connecting pipe through flexible dust collection pipe and casing internal passage, and constitutes complete dust collection flow channel. The utility model utilizes telescopic link and universal joint's dynamic compensation effect, makes dust collection head portion to be able to continuously stick to chamfer curved surface, combines double sealing structure, and effectively solved the dust serious leakage problem caused by operating angle continuous change when curved surface polishing, has dust collection efficiency height, and the sealed effect is good and the advantage that structure is compact.

Description

Technical Field

[0001] This utility model relates to the field of building construction equipment technology, and in particular to a dust collection device for chamfering and grinding concrete columns. Background Technology

[0002] Grinding concrete columns, especially chamfering, is a common process during construction or later decoration. This grinding process generates a lot of dust, which not only seriously pollutes the working environment, but also contains harmful substances such as silica, which can cause irreversible damage to the health of operators if inhaled over a long period of time.

[0003] To address this issue, existing technologies typically involve installing a dust collection device on the grinding machine. This device usually consists of a dust hood covering the grinding area and connected to a negative pressure source such as an industrial vacuum cleaner via a pipe, in order to remove the generated dust in a timely manner. For grinding operations on flat surfaces, this method can achieve good dust collection results because the dust hood can easily maintain a close fit to the surface, forming an effective sealed space.

[0004] However, when working on irregular curved surfaces such as the chamfer of concrete columns, the shortcomings of existing technology become apparent. In order for the grinding disc to always fit the chamfered surface for grinding, the operator must constantly adjust the tilt angle and posture of the grinder. Most existing dust hoods are rigidly or semi-rigidly connected to the grinder body, and this connection method cannot adapt to the complex and ever-changing angles of the grinder. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a dust collection device for grinding and polishing the chamfer of concrete columns. It aims to improve the problem that the dust collection hood of existing grinding and dust collection devices is difficult to maintain a tight fit with curved surfaces such as the chamfer of concrete columns, and that gaps are easily generated when the grinding angle changes, leading to dust leakage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A dust extraction device for grinding and polishing the chamfer of a concrete column includes: a grinding machine housing, a connecting pipe fixedly connected to the top of the grinding machine housing, and an arc-shaped sealing assembly disposed on the grinding machine housing; The arc-shaped sealing assembly has a connection mechanism that enables dynamic compensation of multiple degrees of freedom and a set of double-sealed suction heads, and the assembly together with the grinder housing forms a complete suction channel; The connecting mechanism of the arc-shaped sealing assembly includes a telescopic rod with one end fixedly connected to the side of the grinder housing via a connecting block, and a universal joint rotatably connected to the other end of the telescopic rod; the suction head is a guide hood fixedly connected to the output end of the universal joint; at the opening edge of the guide hood, a sealing skirt and a brush sealing ring are coaxially fixed from the outside to the inside; and the top of the guide hood is also provided with an air outlet, which is connected to the grinder housing via a flexible suction pipe, and the interior of the grinder housing forms a suction channel connecting the flexible suction pipe and the connecting pipe.

[0007] Preferably, the inner wall of the deflector is an arc-shaped surface that matches the preset chamfer radius.

[0008] Furthermore, the aforementioned preset chamfer radius is 25 millimeters.

[0009] Preferably, the sealing skirt is made of silicone rubber.

[0010] Preferably, the brush sealing ring has a high-density brush structure.

[0011] Preferably, the telescopic rod includes an inner rod and an outer rod that can slide and be sleeved together to extend and retract inwards.

[0012] Preferably, the connection between the connecting block and the grinding machine housing is a detachable bolt connection.

[0013] Preferably, the sealing skirt and brush sealing ring are integrally molded with the flow guide.

[0014] This utility model has the following beneficial effects: 1. In this utility model, by setting a dynamic compensation mechanism that works in concert with a universal joint and a telescopic rod, the dust collection head can adapt to changes in the angle and distance of the grinder in real time. This solves the problem that existing dust collection devices cannot continuously fit the dust collection hood to the workpiece, resulting in gaps and dust leakage, when grinding curved surfaces such as the chamfer of concrete columns due to the continuous change of the operating angle. This achieves the technical effect of continuous, all-round, and efficient dust collection on curved surfaces.

[0015] 2. In this utility model, by setting a double sealing structure consisting of an outer flexible sealing skirt and an inner brush sealing ring at the opening edge of the flow guide, the problem of poor sealing and easy leakage when facing high-speed rotating and splashing dust particles is solved when the existing technology uses a single sealing method. It achieves a double sealing effect by using negative pressure to make the flexible sealing skirt self-adaptively fit and by the brush sealing ring providing secondary blocking, which greatly improves the reliability of the seal.

[0016] 3. In this utility model, by cleverly integrating the flow guide cover, dynamic compensation mechanism, and the grinding machine housing and connecting pipe into a complete dust suction channel, the problems of complex structure, low integration with the grinding machine, and inconvenience to operation or obstructed dust suction path of some existing dust suction devices are solved. The overall structure is compact and reasonable, easy to install, and does not affect the flexibility of normal grinding operation. It has strong practicality and promotion value. Attached Figure Description

[0017] Figure 1 This is a perspective view of a concrete column chamfering and grinding dust collection device proposed in this utility model; Figure 2 for Figure 1 Enlarged structural diagram at point A in the diagram; Figure 3 This is a schematic diagram of the sealing skirt of a concrete column chamfering and dust collection device proposed in this utility model; Figure 4 This is a schematic diagram of the dust extraction hood for a concrete column chamfering and grinding dust collection device proposed in this utility model; Figure 5 This is a schematic diagram of the brush sealing ring of a dust extraction device for chamfering and grinding concrete columns proposed in this utility model; Figure 6 This is a schematic diagram illustrating the use of a concrete column chamfering and grinding dust collection device proposed in this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Grinding machine housing; 2. Connecting pipe; 3. Arc-shaped sealing assembly; 301. Flow guide; 302. Sealing skirt; 303. Brush sealing ring; 304. Connecting block; 305. Telescopic rod; 306. Universal joint. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1-6 The present invention provides an embodiment of a concrete column chamfering grinding dust collection device, including a grinding machine housing 1, a connecting pipe 2 fixedly connected to the top of the grinding machine housing 1, and an arc surface sealing component 3 connected to the side of the grinding machine housing 1. The core of the arc surface sealing component 3 as a whole is that it can dynamically adapt to the angle and distance changes during the grinding operation, and together with the grinding machine housing 1 and the connecting pipe 2, it forms a complete negative pressure dust collection channel. The arc-shaped sealing assembly 3 includes multiple components for dynamic connection and compensation. One end of the telescopic rod 305 is fixedly connected to the side of the grinder housing 1 via a connecting block 304. The connecting block 304 is fixed to the grinder housing 1 by detachable bolts for easy installation and maintenance. The other end of the telescopic rod 305 away from the connecting block 304 is rotatably connected to a universal joint 306. The output end of the universal joint 306 is fixedly connected to a guide hood 301, which serves as a dust suction head. The telescopic rod 305 itself includes an inner rod and an outer rod that can slide and extend inward and outward to compensate for radial distance changes during grinding. The universal joint 306 is used to compensate for angular changes caused by the operator changing the grinder's posture during grinding. The air guide hood 301, which is the core of the dust collection system, has a sealing skirt 302 and a brush sealing ring 303 coaxially fixed at the opening edge from the outside to the inside. The two are fixed to the opening edge of the air guide hood 301 by integral molding, forming a double sealing structure. The sealing skirt 302 is made of silicone rubber material, which has good flexibility and conformability. The brush sealing ring 303 is a high-density brush structure to block high-speed flying dust particles. The inner wall of the air guide hood 301 is an arc-shaped curved surface that matches the preset chamfer radius. The preset chamfer radius is 25 mm to adapt to the chamfering and grinding operation of concrete columns of specific specifications.

[0021] To form a complete dust collection system, the top of the flow guide hood 301 is also provided with an air outlet. The air outlet is connected to the grinding machine housing 1 through a flexible dust collection pipe. The interior of the grinding machine housing 1 is formed with a dust collection channel connecting the flexible dust collection pipe and the top connecting pipe 2, thereby guiding the dust-laden airflow drawn in from the flow guide hood 301 to the connecting pipe 2 and finally discharging it to the negative pressure generating device outside. The arc-shaped sealing assembly 3 is fixed to the side of the grinding machine housing 1 by the connecting block 304. One end of the telescopic rod 305 is fixedly connected to the connecting block 304. The telescopic rod 305 is composed of an inner rod and an outer rod that can slide and be connected to each other to extend and retract. Its function is to provide linear displacement compensation for the dust collection head to adapt to the real-time change of the distance between the grinding point and the grinding machine housing 1. Meanwhile, the other end of the telescopic rod 305 away from the connecting block 304 is rotatably connected to a universal joint 306. The output end of the universal joint 306 is fixedly connected to the flow guide 301. The function of the universal joint 306 is to provide all-round angle compensation for the dust collection head, ensuring that when the grinder is tilted, the opening of the flow guide 301 can always face and fit the grinding surface. In the assembled state, the linear extension capability of the telescopic rod 305 and the angular deflection capability of the universal joint 306 combine to form a dynamic compensation mechanism that can follow the changes in the operating posture of the grinder in real time. This composite motion mechanism combining linear extension and universal rotation ensures that the dust collection head, composed of the guide shroud 301, sealing skirt 302 and brush sealing ring 303, can continuously and stably cover the working area throughout the grinding process, regardless of how the grinder moves or tilts, thereby maintaining the airtight state of the dust collection area and greatly improving the dust capture efficiency. As for the negative pressure generating device that provides dust collection power for the entire device, those skilled in the art can use conventional equipment such as industrial vacuum cleaners to connect through the connecting pipe 2. Its specific structure is a well-known technology in the field and will not be described in detail here. To enhance the fit between the suction head and the workpiece, the inner wall of the flow guide shroud 301 is constructed as an arc-shaped surface matching a preset chamfer radius of 25 mm. This allows the flow guide shroud 301 to tightly cover the chamfer of a concrete column of a specific size. To achieve a flexible, adaptive seal using negative pressure, the sealing skirt 302 is made of silicone rubber, a material with excellent elasticity and flexibility. To further block high-speed flying dust particles, the brush seal ring 303 employs a high-density brush structure. The dense bristles can form a seal on the inner side of the sealing skirt 302. To form a physical barrier and achieve linear distance compensation for the vacuum head, the telescopic rod 305 specifically includes an inner rod and an outer rod that can slide and extend inwards and outwards. To facilitate the installation, disassembly, and maintenance of the entire arc-shaped sealing assembly 3, the connecting block 304 is fixedly connected to the grinding machine housing 1 by detachable bolts. To ensure the structural strength and sealing performance of the connection between the sealing skirt 302 and the brush sealing ring 303 and the guide shroud 301, the sealing skirt 302 and the brush sealing ring 303 are firmly fixed to the opening edge of the guide shroud 301 by integral molding.

[0022] Working principle: When performing chamfering and grinding operations on concrete columns, the external negative pressure generating device connected to the connecting pipe 2 is first activated. The airflow passes through the connecting pipe 2 and the dust suction channel inside the grinding machine housing 1, and then through the flexible dust suction pipe to finally form a negative pressure environment inside the guide hood 301. When the guide hood 301 approaches the grinding surface, the arc-shaped surface of its inner wall fits against the chamfer of the workpiece. Under the action of the internal and external pressure difference, the flexible sealing skirt 302 made of silicone rubber material will undergo radial deformation and fit tightly against the surface of the concrete column, forming the first main seal. The high-density brush sealing ring 303 located inside the sealing skirt 302 serves as an auxiliary seal, further blocking the dust escape path. Together, they form a sealed dust suction chamber around the grinding disc working area.

[0023] Once the grinder starts working, the large amount of dust generated is completely confined within the aforementioned sealed dust collection chamber. Guided by negative pressure airflow, the dust is continuously transported to the external dust collection device via the air outlet at the top of the guide hood 301, the flexible dust collection pipe, the dust collection channel inside the grinder housing 1, and the connecting pipe 2. Throughout the grinding process, the operator needs to constantly change the angle of the grinder to adapt to the cylindrical surface. At this time, the universal joint 306 connected between the telescopic rod 305 and the guide hood 301 can compensate for any changes in the grinding angle in real time. The telescopic rod 305, composed of the inner and outer rods, ensures that the dust collection head and the grinding area are always kept at the optimal distance. The telescopic rod 305 is connected and fixed to the grinder housing 1 by the connecting block 304, ensuring that the dust collection head, composed of the guide hood 301, the sealing skirt 302, and the brush sealing ring 303, can always cover the grinding disc working area and maintain a sealed state, thereby achieving comprehensive and continuous dust removal without dead angles during the chamfering grinding process.

Claims

1. A dust extraction device for chamfering and grinding concrete columns, comprising: The grinding machine housing (1) and the connecting pipe (2) fixedly connected to the top of the grinding machine housing (1); The invention is characterized by further comprising: an arc-shaped sealing assembly (3), wherein the arc-shaped sealing assembly (3) includes a telescopic rod (305) with one end fixedly connected to the side of the grinding machine housing (1) via a connecting block (304), and a universal joint (306) rotatably connected to the other end of the telescopic rod (305) away from the connecting block (304), and a flow guide (301) fixedly connected to the output end of the universal joint (306), and a sealing skirt (302) and a brush sealing ring (303) coaxially fixed from the outside to the inside at the opening edge of the flow guide (301), and an air outlet is provided at the top of the flow guide (301), which is connected to the grinding machine housing (1) via a flexible dust suction pipe, and a dust suction channel is formed inside the grinding machine housing (1) that connects the flexible dust suction pipe and the connecting pipe (2).

2. The dust extraction device for chamfering and grinding of concrete columns according to claim 1, characterized in that: The inner wall of the flow guide (301) is an arc-shaped surface that matches the preset chamfer radius.

3. The dust extraction device for chamfering and grinding of concrete columns according to claim 2, characterized in that: The preset chamfer radius is 25 mm.

4. The dust extraction device for chamfering and grinding of concrete columns according to claim 1, characterized in that: The sealing skirt (302) is made of silicone rubber.

5. A dust extraction device for chamfering and grinding concrete columns according to claim 1, characterized in that: The brush sealing ring (303) has a high-density brush structure.

6. The dust extraction device for chamfering and grinding of concrete columns according to claim 1, characterized in that: The telescopic rod (305) includes an inner rod and an outer rod that can slide and be extended and retracted inwards and outwards.

7. A dust extraction device for chamfering and grinding concrete columns according to claim 1, characterized in that: The connecting block (304) is fixedly connected to the grinding machine housing (1) by detachable bolts.

8. A dust extraction device for chamfering and grinding concrete columns according to claim 1, characterized in that: The sealing skirt (302) and the brush sealing ring (303) are fixed to the opening edge of the flow guide (301) by integral molding.

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