A mobile extraction hood

Abstract

The utility model relates to the technical field of air extraction cover, and disclose a mobile air extraction cover, including the casing, the top of casing is connected with the connecting ring through the connecting structure, the surface of connecting ring is equipped with the joint groove, the surface of connecting ring is equipped with the positioning hole symmetrically, the positioning hole is linked with the joint groove, and the inner chamber of joint groove is connected with the abutting plate slidingly, and the abutting plate is equipped with the compression spring a between joint groove, the joint groove is connected with the connecting column slidingly, and the connecting column one end fixed connection suction mouth spare, through the cooperation structure of positioning hole, joint groove, clamping block and compression spring, realize the tool -free quick disassembly of suction mouth spare, only need to push into, rotate when installing can complete locking to connecting column aim at positioning hole, can remove the fixed when disassembling and reverse operation, the whole process does not need extra tool, greatly simplifies the operation step, significantly shortens the switching time of suction mouth spare, improves the station switching efficiency, reduces the working strength of operator.

Description

Technical Field

[0001] This utility model relates to the field of fume extraction hood technology, specifically a mobile fume extraction hood. Background Technology

[0002] Portable exhaust hoods, also known as mobile fume hoods or mobile ventilation hoods, are a common type of ventilation equipment. They are mainly used to capture and exhaust pollutants such as harmful gases, vapors, and dust particles generated in the work area. This equipment is named for its ease of movement and ability to be flexibly adjusted according to actual needs. Portable exhaust hoods are an important tool for improving air quality in factories, laboratories, and other work environments, and are of great significance for protecting workers' health and improving work efficiency. Existing air intakes are typically of a single shape (such as a circle), which cannot meet the diverse needs of welding, grinding, and spraying stations for air intake shape (such as square or trumpet-shaped) size. Furthermore, replacing the air intake cover requires tools for disassembly, which is cumbersome and has low switching efficiency. In view of this, the present invention solves the above-mentioned technical problems by proposing a mobile fume extraction hood. Utility Model Content

[0003] To address the shortcomings of the aforementioned background technology, this utility model provides a technical solution for a mobile exhaust hood. Firstly, this utility model overcomes the limitation of existing technologies where the exhaust port is typically of a single shape, offering a variety of exhaust port shapes. This allows for flexible selection of suitable exhaust port components based on the varying needs of different workstations such as welding, grinding, and spraying for the shape and size of the exhaust port. This ensures efficient collection of dust-laden or harmful airflow generated at each workstation, effectively expanding the applicable scenarios and scope of the equipment and avoiding the problem of low suction efficiency caused by mismatched exhaust port shapes. Secondly, through the cooperative structure of positioning holes, snap-fit ​​grooves, snap-fit ​​blocks, and compression springs, tool-free quick assembly and disassembly of the exhaust port components are achieved. During installation, simply align the connecting post with the positioning hole, push it in, and rotate to lock it. Disassembly is achieved by reversing the operation to release the fixation. The entire process requires no additional tools, significantly simplifying the operation steps, substantially shortening the switching time of the exhaust port components, improving workstation switching efficiency, and reducing the workload of operators.

[0004] This utility model provides the following technical solution: a mobile fume extraction hood, including a shell; The top of the housing is connected to a connecting ring via a connecting structure; the surface of the connecting ring is provided with a snap-fit ​​groove, and the surface of the connecting ring is symmetrically provided with positioning holes, the positioning holes communicating with the snap-fit ​​groove, the inner cavity of the snap-fit ​​groove being slidably connected with a pressure plate, and a compression spring a is provided between the pressure plate and the snap-fit ​​groove; A connecting post is slidably engaged in the slot, and one end of the connecting post is fixedly connected to the air intake component. The inner cavity of the connecting column is slidably connected to a snap-fit ​​block, and a compression spring b is provided between the snap-fit ​​block and the inner cavity of the connecting column. The inner wall of the snap-fit ​​groove is provided with a snap-fit ​​hole corresponding to the position of the snap-fit ​​block.

[0005] As a preferred technical solution of this utility model, the connection structure includes a connecting pipe bolted to the top of the housing, a corrugated pipe threaded into the inner cavity of the connecting pipe, an air intake pipe rotatably connected into the inner cavity of the corrugated pipe, and the inner cavity of the connecting ring embedded in the surface of the air intake pipe and coaxially arranged with the air intake pipe.

[0006] As a preferred embodiment of this utility model, the inner cavity of the air intake pipe is rotatably connected to a rotating shaft, the surface of the rotating shaft is fixedly connected to an air regulating plate, and one end of the rotating shaft extends out of the air intake pipe and is fixedly connected to a knob.

[0007] As a preferred embodiment of this utility model, both the snap-fit ​​block and the snap-fit ​​hole are hemispherical structures, with the hemispherical surface of the snap-fit ​​block facing the snap-fit ​​hole, and the outer diameter of the snap-fit ​​block matching the inner cavity of the snap-fit ​​hole.

[0008] As a preferred technical solution of this utility model, the air intake component includes at least one of a circular air intake component, a square air intake component, and a horn-shaped air intake component, and each of the air intake components is adapted to be connected to the connecting ring through the connecting post.

[0009] As a preferred embodiment of this utility model, both the snap-fit ​​groove and the connecting post are T-shaped structures, and the shape of the connecting post is adapted to the groove shape of the snap-fit ​​groove.

[0010] As a preferred embodiment of this utility model, the two ends of the compression spring a are fixedly connected to one end of the pressure plate and the inner wall of the snap-fit ​​groove, respectively, and the two ends of the compression spring b are fixedly connected to one end of the snap-fit ​​block and the inner wall of the connecting column, respectively.

[0011] As a preferred embodiment of this utility model, each of the four corners of the bottom of the housing is fixedly connected with a movable component, which is a self-locking universal wheel that can be locked to rotate and move.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model breaks through the limitation of the existing technology where the air intake is usually of a single shape, and provides a variety of air intake parts with different shapes. According to the different requirements of different work stations such as welding, grinding, and spraying for the shape and size of the air intake, the appropriate air intake part can be flexibly selected to ensure that the dust or harmful airflow generated at each work station can be efficiently collected, effectively expanding the applicable scenarios and application range of the equipment, and avoiding the problem of low air intake efficiency caused by mismatched air intake shapes.

[0013] 2. Compared with the shortcomings of existing technologies that require tools to disassemble and operate when replacing the suction hood, this utility model achieves tool-free quick disassembly and assembly of the suction hood through the cooperation structure of positioning holes, snap-fit ​​grooves, snap-fit ​​blocks and compression springs. During installation, simply align the connecting post with the positioning hole, push it in and rotate it to lock it. During disassembly, reverse the operation to release the fixation. The whole process does not require additional tools, which greatly simplifies the operation steps, significantly shortens the switching time of the suction hood, improves the workstation switching efficiency, and reduces the workload of operators.

[0014] 3. During the installation of the air intake component, the compression spring a drives the pressure plate to press the connecting column tightly, while the snap-fit ​​block snaps into the snap-fit ​​hole under the action of the compression spring b. The double fixing structure can effectively ensure the stability of the connecting column in the snap-fit ​​groove, and prevent the air intake component from loosening or shifting due to vibration or airflow impact during operation. This ensures a tight connection between the air intake component and the airflow channel, ensuring a stable and reliable air intake process and maintaining a good air intake effect at all times. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partially enlarged view of the present invention; Figure 3 This is a schematic diagram of the air regulating plate structure of this utility model; Figure 4 This is a schematic diagram of the connecting ring structure of this utility model; Figure 5 This is a schematic diagram of the positioning hole structure of this utility model; Figure 6 This is a schematic diagram of the compression spring a structure of this utility model; Figure 7 This is a schematic diagram of the compression spring b structure of this utility model; Figure 8 This utility model relates to a horn-shaped air intake component. Figure 9 This is a square air intake component of the present invention.

[0016] In the diagram: 1. Housing; 2. Connecting ring; 201. Snap-fit ​​groove; 202. Positioning hole; 203. Pressure plate; 204. Compression spring a; 205. Connecting column; 206. Air intake component; 207. Snap-fit ​​block; 208. Compression spring b; 209. Snap-fit ​​hole; 3. Connecting pipe; 301. Bellows; 302. Air inlet pipe; 4. Rotating shaft; 401. Air regulating plate; 402. Knob; 5. Moving component. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-9 As shown, a mobile fume hood includes a housing 1; The top of the housing 1 is connected to a connecting ring 2 via a connecting structure; the surface of the connecting ring 2 is provided with a snap-fit ​​groove 201, and the surface of the connecting ring 2 is symmetrically provided with positioning holes 202, which communicate with the snap-fit ​​groove 201; the inner cavity of the snap-fit ​​groove 201 is slidably connected with a pressure plate 203, and a compression spring a204 is provided between the pressure plate 203 and the snap-fit ​​groove 201; A connecting post 205 is slidably engaged in the slot 201, and one end of the connecting post 205 is fixedly connected to the air intake component 206. The inner cavity of the connecting post 205 is slidably connected to a snap-fit ​​block 207. A compression spring b208 is provided between the snap-fit ​​block 207 and the inner cavity of the connecting post 205. The inner wall of the snap-fit ​​groove 201 is provided with a snap-fit ​​hole 209 corresponding to the position of the snap-fit ​​block 207.

[0019] The connection structure includes a connecting pipe 3 bolted to the top of the housing 1, a bellows 301 threadedly connected to the inner cavity of the connecting pipe 3, an air intake pipe 302 rotatably connected to the inner cavity of the bellows 301, and an inner cavity of the connecting ring 2 embedded in the surface of the air intake pipe 302 and coaxially arranged with the air intake pipe 302.

[0020] The inner cavity of the air intake pipe 302 is rotatably connected to a rotating shaft 4, and an air regulating plate 401 is fixedly connected to the surface of the rotating shaft 4. One end of the rotating shaft 4 extends out of the air intake pipe 302 and is fixedly connected to a knob 402.

[0021] Both the snap-fit ​​block 207 and the snap-fit ​​hole 209 are hemispherical structures. The hemispherical surface of the snap-fit ​​block 207 is set facing the snap-fit ​​hole 209, and the outer diameter of the snap-fit ​​block 207 is adapted to the inner cavity of the snap-fit ​​hole 209.

[0022] The air intake component 206 includes at least one of a circular air intake component 206, a square air intake component 206, and a trumpet-shaped air intake component 206, and each air intake component 206 is adapted to be connected to the connecting ring 2 via a connecting post 205.

[0023] Both the snap-fit ​​groove 201 and the connecting post 205 are T-shaped structures, and the shape of the connecting post 205 is compatible with the groove shape of the snap-fit ​​groove 201.

[0024] The two ends of the compression spring a204 are fixedly connected to one end of the pressure plate 203 and the inner wall of the snap-fit ​​groove 201, respectively. The two ends of the compression spring b208 are fixedly connected to one end of the snap-fit ​​block 207 and the inner wall of the connecting post 205, respectively.

[0025] Movable parts 5 are fixedly connected to the four corners of the bottom of the housing 1. The movable parts 5 are self-locking casters that can be locked to rotate and move.

[0026] The movable parts 5 fixed at the four corners of the bottom of the housing 1 are self-locking universal wheels that can be locked to rotate and move. When the housing 1 is pushed, the movable parts 5 can rotate freely and drive the housing 1 to the target working position. After reaching the position, the rotation and movement functions of the movable parts 5 are locked to keep the housing 1 stable and prevent displacement during operation. The air intake component 206 (including at least one of round air intake component, square air intake component, and horn-shaped air intake component) is connected to the connecting ring 2 through a T-shaped connecting post 205. The T-shaped snap-fit ​​groove 201 on the surface of the connecting ring 2 is adapted to the shape of the connecting post 205, and the positioning holes 202 symmetrically opened on the surface of the connecting ring 2 are connected to the snap-fit ​​groove 201. The positioning holes 202 provide an initial entry channel for the connecting post 205. A sliding pressure plate 203 is provided in the snap-fit ​​groove 201. A compression spring a204 is connected between the pressure plate 203 and the inner wall of the snap-fit ​​groove 201 to prepare for subsequent pressing of the connecting post 205. Align the connecting post 205 with the positioning hole 202 on the surface of the connecting ring 2, so that the connecting post 205 first enters the inner cavity of the positioning hole 202 to complete the initial positioning and ensure that the docking direction of the connecting post 205 and the snap-fit ​​groove 201 is accurate. Push the air intake component 206, which in turn drives the connecting column 205, which is fixedly connected to it, to enter the inner cavity of the locking groove 201 from the inner cavity of the positioning hole 202. During the pushing process, the connecting column 205 contacts and presses the pressure plate 203, and the pressure plate 203 moves towards the inner wall of the locking groove 201, while compressing the compression spring a204, until the connecting column 205 is completely inserted into the inner cavity of the locking groove 201. The air intake component 206 rotates, causing the connecting column 205 to rotate synchronously within the cavity of the locking groove 201. During rotation, the locking block 207 within the cavity of the connecting column 205 is squeezed by the inner wall of the locking groove 201 and contracts towards the cavity of the connecting column 205, while simultaneously compressing the compression spring b208 between the locking block 207 and the inner wall of the connecting column 205. When the connecting column 205 rotates to the predetermined position, the locking block 207 aligns with the locking hole 209 on the inner wall of the locking groove 201 (both the locking block 207 and the locking hole 209 are hemispherical structures, and the outer diameter of the locking block 207 is adapted to the inner cavity of the locking hole 209). The compression spring b208 resets and pushes the locking block 207 out of the cavity of the connecting column 205, automatically locking into the inner cavity of the locking hole 209. At this point, the rotation of the air intake component 206 stops. After the snap-fit ​​block 207 completes the snap-fit, the compression spring a204 restores its elastic deformation, driving the pressure plate 203 to move towards the connecting post 205, pressing the connecting post 205, further enhancing the stability of the connecting post 205 in the snap-fit ​​groove 201, and ensuring that the air intake component 206 is firmly installed. The top of the housing 1 is connected to the connecting ring 2 through a connecting structure. The connecting pipe 3 in the connecting structure is bolted to the top of the housing 1. The bellows 301 is threaded to the inner cavity of the connecting pipe 3. The air inlet pipe 302 is rotatably connected to the inner cavity of the bellows 301. The inner cavity of the connecting ring 2 is embedded in the surface of the air inlet pipe 302 and is coaxial with the air inlet pipe 302, forming a complete airflow channel from the air inlet 206 to the housing 1. The dust-laden or harmful airflow drawn in by the air intake 206 flows through the air intake pipe 302 to the bellows 301, is transmitted through the bellows 301 to the connecting pipe 3, and finally enters the interior of the housing 1 through the connecting pipe 3, thus completing the collection and initial conduction of the airflow. A rotating shaft 4 is rotatably connected to the inner cavity of the air intake pipe 302. An air regulating plate 401 is fixedly connected to the surface of the rotating shaft 4. One end of the rotating shaft 4 extends out of the air intake pipe 302 and is fixedly connected to a knob 402. When the knob 402 is rotated, the knob 402 drives the rotating shaft 4 to rotate in the inner cavity of the air intake pipe 302. The rotating shaft 4 synchronously drives the air regulating plate 401 to rotate. By changing the angle between the air regulating plate 401 and the inner cavity of the air intake pipe 302, the area of ​​the air regulating plate 401 blocking the inner cavity of the air intake pipe 302 is adjusted, thereby controlling the flow rate of air through the air intake pipe 302 and realizing the function of air volume regulation. The dust collection structure inside the housing 1 of this utility model has core components including filters and centrifugal fans commonly used in the prior art. Its main function is to purify and power the dust-laden or harmful airflow transmitted to the inside of the housing 1 through the airflow channel (such as the centrifugal fan providing the power for airflow intake and transmission, and the filter filtering and intercepting impurities and dust in the airflow). Since the specific composition and working principle of this dust collection structure are within the scope of existing mature technology, and the relevant technical details have been widely disclosed and applied in the industry, this utility model will not elaborate on its working principle. For details, please refer to the working mechanism of the same type of filter and centrifugal fan combination structure in the prior art.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable fume hood, comprising: Shell (1); The features are as follows: the top of the housing (1) is connected to a connecting ring (2) through a connecting structure; the surface of the connecting ring (2) is provided with a snap-fit ​​groove (201), and the surface of the connecting ring (2) is symmetrically provided with positioning holes (202), the positioning holes (202) are connected to the snap-fit ​​groove (201), the inner cavity of the snap-fit ​​groove (201) is slidably connected with a pressure plate (203), and a compression spring a (204) is provided between the pressure plate (203) and the snap-fit ​​groove (201); A connecting post (205) is slidably engaged in the slot (201), and one end of the connecting post (205) is fixedly connected to the air intake component (206). The inner cavity of the connecting column (205) is slidably connected to a snap-fit ​​block (207), and a compression spring b (208) is provided between the snap-fit ​​block (207) and the inner cavity of the connecting column (205). The inner wall of the snap-fit ​​groove (201) is provided with a snap-fit ​​hole (209) corresponding to the position of the snap-fit ​​block (207).

2. The mobile fume extraction hood according to claim 1, characterized in that: The connection structure includes a connecting pipe (3) bolted to the top of the housing (1), a corrugated pipe (301) threadedly connected to the inner cavity of the connecting pipe (3), an air intake pipe (302) rotatably connected to the inner cavity of the corrugated pipe (301), and the inner cavity of the connecting ring (2) embedded in the surface of the air intake pipe (302) and coaxially arranged with the air intake pipe (302).

3. A mobile fume extraction hood according to claim 2, characterized in that: The inner cavity of the air intake pipe (302) is rotatably connected to a rotating shaft (4), and a wind regulating plate (401) is fixedly connected to the surface of the rotating shaft (4). One end of the rotating shaft (4) extends out of the air intake pipe (302) and is fixedly connected to a knob (402).

4. A mobile fume extraction hood according to claim 1, characterized in that: Both the snap-fit ​​block (207) and the snap-fit ​​hole (209) are hemispherical structures. The hemispherical surface of the snap-fit ​​block (207) is set facing the snap-fit ​​hole (209), and the outer diameter of the snap-fit ​​block (207) is adapted to the inner cavity of the snap-fit ​​hole (209).

5. A mobile fume extraction hood according to claim 1, characterized in that: The air intake component (206) includes at least one of a circular air intake component, a square air intake component, and a horn-shaped air intake component, and each of the air intake components (206) is adapted to be connected to the connecting ring (2) through the connecting post (205).

6. A mobile fume extraction hood according to claim 1, characterized in that: Both the snap-fit ​​groove (201) and the connecting post (205) are T-shaped structures, and the shape of the connecting post (205) is adapted to the groove shape of the snap-fit ​​groove (201).

7. A mobile fume extraction hood according to claim 1, characterized in that: The two ends of the compression spring a (204) are fixedly connected to one end of the pressure plate (203) and the inner wall of the snap-fit ​​groove (201), respectively. The two ends of the compression spring b (208) are fixedly connected to one end of the snap-fit ​​block (207) and the inner wall of the connecting column (205), respectively.

8. A mobile fume extraction hood according to claim 1, characterized in that: The four corners of the bottom of the housing (1) are fixedly connected with movable parts (5), and the movable parts (5) are self-locking casters that can be locked to rotate and move.

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