Universal exhaust tube

Abstract

The utility model discloses a universal exhaust tube which comprises a tube assembly and an air collecting cover, the tube assembly comprises a plurality of sections of tube bodies and shaft joints connected between the adjacent tube bodies, and the end portion of the tube assembly is connected to a connecting assembly on the air collecting cover. The connecting assembly comprises a valve plate mounting seat, when the pipe assembly is connected to the connecting assembly, the valve plate mounting seat is located at the end of the pipe assembly, a fixing plate and a valve plate which are stacked are arranged on the valve plate mounting seat, at least one ventilation opening is formed in the fixing plate, a rotary knob is arranged on the valve plate, and the valve plate is connected with the rotary knob. The valve plate can be rotated by screwing the rotary knob so that the valve plate can open or close the ventilation opening. By the adoption of the technical scheme, the valve plate is connected with the rotary knob, the blocking cover does not need to be rotated in a large range, the ventilation opening can be opened or closed only by rotating the rotary knob, and the universal exhaust pipe is suitable for a laboratory or industrial equipment environment with a compact space.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of universal air extraction pipe, belong to ventilation and exhaust equipment technical field. BACKGROUND

[0002] The wind collecting hood of laboratory is a kind of ventilation equipment for capturing and discharging harmful gases, smoke, dust and other pollutants generated during experiment, aiming to provide a safe and healthy working environment for laboratory staff, to ensure that the air quality in laboratory meets the relevant standard requirements. The universal wind collecting hood is usually equipped with rotatable joints, telescopic arms, which can realize the adjustment and positioning of multiple directions, facilitate adjustment according to the specific location of pollution source, for example, the universal exhaust hood for laboratory disclosed in Chinese patent document CN209077404U sets a cover at the opening position of the wind collecting hood, the edge of the cover is provided with external threads, the inner wall of the wind collecting hood is provided with internal threads matching the external threads along the opening circumference, and then the cover is screwed at the opening position of the wind collecting hood, which seals the opening of the wind collecting hood. But this structure is limited in rotation operation space, and enough rotation space is needed when installing or disassembling the cover. If the equipment is arranged compactly, the operation may be limited, especially in laboratory or industrial equipment. SUMMARY

[0003] Therefore, the purpose of the utility model is to provide a kind of universal air extraction pipe, which is provided with a screwing piece capable of plugging the air duct inside the wind collecting hood.

[0004] In order to achieve the above purpose, the utility model provides a kind of universal air extraction pipe, which comprises a pipe assembly and a wind collecting hood. The pipe assembly comprises multiple pipe bodies and shaft joints connected between adjacent pipe bodies. The end of the pipe assembly is connected to a connecting assembly on the wind collecting hood. The connecting assembly comprises a valve plate mounting seat. When the pipe assembly is connected to the connecting assembly, the valve plate mounting seat is located at the end of the pipe assembly. A fixed plate and a valve plate are stacked on the valve plate mounting seat. At least one air vent is provided on the fixed plate. A knob is provided on the valve plate. By rotating the knob, the valve plate can be turned to open or close the air vent.

[0005] A knob mounting plate is provided on the valve plate mounting seat. A slot is provided on the knob mounting plate for ventilation. The knob is rotatably mounted on the knob mounting plate.

[0006] An installation hole is provided on the wind collecting hood. The valve plate mounting seat further comprises a compression ring part and a cylindrical part provided on the compression ring part. The cylindrical part is inserted into the inside of the end of the pipe assembly. The fixed plate is fixed to the inside of the cylindrical part. The compression ring part is pressed on the wind collecting hood.

[0007] The knob mounting plate is provided with a shaft hole for mounting the knob. One end of the knob is a handle end, and the other end is a snap-fit ​​end. The snap-fit ​​end passes through the shaft hole and is snapped and fixed to the valve plate.

[0008] A stepped structure is provided on the inner wall of the cylindrical part, the edge of the fixing plate overlaps the stepped structure, a positioning protrusion extending radially inward is provided at the edge of the stepped structure, and a positioning notch is provided on the fixing plate to cooperate with the positioning protrusion.

[0009] The fixing plate is provided with a circular through hole for the buckle end to pass through, and the valve plate is provided with an elongated through hole. The buckle end includes two spaced-apart claws, which pass through the elongated through hole and are engaged on the valve plate.

[0010] The connecting assembly further includes an outer clamping member and an inner clamping member. The outer clamping member includes an outer ring portion and an outer cylinder portion, and the inner clamping member includes an inner ring portion and an inner cylinder portion. The outer ring portion and the inner ring portion are clamped on the upper and lower sides of the edge of the mounting hole. The outer cylinder portion is screwed onto the inner cylinder portion, and the end of the pipe assembly is screwed onto the inner cylinder portion. A relief groove is provided on the pressure ring portion, and the inner ring portion is located in the relief groove.

[0011] The shaft joint includes two interlocking bowl-shaped parts that can rotate relative to each other; an mounting sleeve for connecting the tube body is provided on the bowl-shaped parts.

[0012] The shaft joint also includes a bolt, the bolt's thread passing through two cup-shaped parts and then screwed into a nut.

[0013] Compression springs are also provided inside the two bowl-shaped parts, and the compression springs are sleeved on the outside of the screw.

[0014] The bottom of the bowl-shaped component is provided with a positioning groove, and the nut is provided with a positioning block corresponding to the positioning groove.

[0015] A sealing ring is provided at the edge of the two interlocking bowl-shaped parts.

[0016] By adopting the above technical solution, the universal exhaust pipe of this utility model has the following beneficial effects compared with the prior art:

[0017] 1. By connecting the valve plate to the knob, the vent can be opened or closed simply by turning the knob, eliminating the need for extensive rotation of the cover. This design is suitable for compact laboratory or industrial environments.

[0018] 2. The modular design facilitates installation and disassembly. The outer and inner clamps of the connecting components cooperate with each other, simplifying the installation process between the pipe assembly and the air collector hood.

[0019] 3. Add a sealing ring to the edge of the cup-shaped part of the shaft joint to further improve the sealing performance of the exhaust pipe and effectively prevent gas leakage.

[0020] 4. The shaft joint consists of two interlocking and rotatable cup-shaped parts. It provides adjustment and fixing functions through compression springs and bolts, realizing the flexibility of multi-directional adjustment. The compression springs inside the cup-shaped parts provide elastic support, so that the shaft joint maintains a stable connection state after multiple adjustments.

[0021] 5. The outer and inner cylinders are connected by screws, which allows for quick fixing and disassembly of the pipe assembly, simplifying maintenance operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a cross-sectional view of the assembly structure of the air collector shroud and connecting components.

[0024] Figure 3 for Figure 2 A magnified view of part A in the image.

[0025] Figure 4 An exploded view of the valve plate mounting base and fixing plate, valve plate and knob.

[0026] Figure 5 This is an exploded view of the shaft joint.

[0027] Figure 6 for Figure 5 Another perspective diagram.

[0028] Figure 7 This is a sectional view of the shaft joint. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1-7 As shown, this utility model provides a universal exhaust pipe, including a pipe assembly 1 and an air collection hood 2. The pipe assembly 1 includes multiple pipe sections 11 and shaft joints 12 connecting adjacent pipe sections 11. The end of the pipe assembly 1 is connected to a connecting component 3 on the air collection hood 2.

[0031] The shaft joint 12 includes two interlocking bowl-shaped parts 121, a bolt 122, a compression spring 123, and a sealing ring 124. The two bowl-shaped parts 121 can rotate relative to each other. An installation cylinder 125 for connecting the pipe body 11 is provided on the bowl-shaped part 121, and multiple pipe sections 11 are respectively inserted into the corresponding installation cylinder 125.

[0032] The bolt 122 passes through two cup-shaped members 121 and is screwed onto a nut 126. The compression spring 123 is sleeved on the outside of the bolt. A positioning groove 121a is provided at the bottom of the cup-shaped member 121, and a positioning block 126a corresponding to the positioning groove 121a is provided on the nut 126. The sealing ring 124 is located at the edge of the two interlocking cup-shaped members 121.

[0033] The connecting assembly 3 includes a valve plate mounting base 31, an outer clamping member 32, and an inner clamping member 33. When the pipe assembly 1 is connected to the connecting assembly 3, the valve plate mounting base 31 is located at the end of the pipe assembly 1. A fixed plate 34 and a valve plate 35 are stacked on the valve plate mounting base 31. The fixed plate 34 is provided with at least one vent 341. The valve plate 35 is provided with a knob 36. By turning the knob 36, the valve plate 35 can be rotated to open or close the vent 341.

[0034] The outer clamping member 32 includes an outer ring portion 321 and an outer cylinder portion 322, and the inner clamping member 33 includes an inner ring portion 331 and an inner cylinder portion 332. An installation hole is provided on the air collecting hood 2. The outer ring portion 321 and the inner ring portion 331 are clamped on the upper and lower sides of the edge of the installation hole. The outer cylinder portion 322 is screwed onto the inner cylinder portion 332. The end of the pipe assembly 1 is screwed onto the inner cylinder portion 332.

[0035] The valve plate mounting base 31 includes a pressure ring portion 311, a knob mounting plate 312 located inside the pressure ring portion 311, and a cylindrical portion 313 disposed on the pressure ring portion 311. The knob mounting plate 312 has a slot 312a for ventilation. The knob 36 is rotatably mounted on the knob mounting plate 312. A clearance groove 311a is provided on the pressure ring portion 311, and the inner ring portion 331 is located within the clearance groove 311a.

[0036] The cylindrical portion 313 is inserted into the inner side of the end of the tube assembly 1, and the fixing plate 34 is fixed to the inner side of the cylindrical portion 313.

[0037] The knob mounting plate 312 is provided with a shaft hole 312a for mounting the knob 361. One end of the knob 361 is a handle end 361a, and the other end is a snap-fit ​​end 361b. The snap-fit ​​end 361b passes through the shaft hole 312a and is snapped and fixed to the valve plate 35.

[0038] A stepped structure 313a is provided on the inner wall of the cylindrical portion 313. The edge of the fixing plate 34 overlaps the stepped structure 313a. A positioning protrusion 313b extending radially inward is provided at the edge of the stepped structure 313a. A positioning notch 342 is provided on the fixing plate 34 to cooperate with the positioning protrusion 313b. In this embodiment, the positioning protrusion 313b is a convex ridge structure vertically provided on the inner wall of the cylindrical portion 313.

[0039] The fixing plate 34 has a circular through hole 343 for the latching end 361b to pass through, and the valve plate 35 has an elongated through hole 351. The latching end 361b includes two spaced-apart claws 361b1, which pass through the elongated through hole 351 and are engaged with the valve plate 35. After the two claws 361b1 are inserted into the elongated through hole 351, they form a non-rotatable relationship with the valve plate 35, so that turning the knob 361 can drive the valve plate 35 to rotate synchronously.

[0040] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A universal exhaust duct, characterized in that: The device includes a pipe assembly and an air collector hood. The pipe assembly includes multiple pipe sections and shaft joints connecting adjacent pipe sections. The end of the pipe assembly is connected to a connecting assembly on the air collector hood. The connecting assembly includes a valve plate mounting seat. When the pipe assembly is connected to the connecting assembly, the valve plate mounting seat is located at the end of the pipe assembly. The valve plate mounting seat is provided with a fixed plate and a valve plate stacked on top of each other. The fixed plate is provided with at least one vent. The valve plate is provided with a knob. By turning the knob, the valve plate can be rotated to open or close the vent.

2. The universal exhaust duct as described in claim 1, characterized in that: A knob mounting plate is provided on the valve plate mounting base, and the knob mounting plate has a slot for ventilation; the knob is rotatably mounted on the knob mounting plate.

3. The universal exhaust duct as described in claim 2, characterized in that: The air collecting hood is provided with mounting holes. The valve plate mounting seat also includes a pressure ring and a cylindrical part disposed on the pressure ring. The cylindrical part is inserted into the inner side of the end of the pipe assembly. The fixing plate is fixed to the inner side of the cylindrical part. The pressure ring is pressed against the air collecting hood.

4. The universal exhaust duct as described in claim 3, characterized in that: The knob mounting plate is provided with a shaft hole for mounting the knob. One end of the knob is a handle end, and the other end is a snap-fit ​​end. The snap-fit ​​end passes through the shaft hole and is snapped and fixed to the valve plate.

5. The universal exhaust duct as described in claim 4, characterized in that: A stepped structure is provided on the inner wall of the cylindrical part, the edge of the fixing plate overlaps the stepped structure, a positioning protrusion extending radially inward is provided at the edge of the stepped structure, and a positioning notch is provided on the fixing plate to cooperate with the positioning protrusion.

6. The universal exhaust duct as described in claim 5, characterized in that: The fixing plate is provided with a circular through hole for the buckle end to pass through, and the valve plate is provided with an elongated through hole. The buckle end includes two spaced-apart claws, which pass through the elongated through hole and are engaged on the valve plate.

7. The universal exhaust duct as described in claim 6, characterized in that: The connecting assembly further includes an outer clamping member and an inner clamping member. The outer clamping member includes an outer ring portion and an outer cylinder portion, and the inner clamping member includes an inner ring portion and an inner cylinder portion. The outer ring portion and the inner ring portion are clamped on the upper and lower sides of the edge of the mounting hole. The outer cylinder portion is screwed onto the inner cylinder portion, and the end of the pipe assembly is screwed onto the inner cylinder portion. A relief groove is provided on the pressure ring portion, and the inner ring portion is located in the relief groove.

8. The universal exhaust duct as described in any one of claims 1-7, characterized in that: The shaft joint includes two interlocking bowl-shaped parts that can rotate relative to each other; an mounting sleeve for connecting the tube body is provided on the bowl-shaped parts.

9. The universal exhaust duct as described in claim 8, characterized in that: The shaft joint also includes a bolt, the bolt's thread passing through two cup-shaped parts and then screwed into a nut.

10. The universal exhaust duct as described in claim 9, characterized in that: Compression springs are also provided inside the two bowl-shaped parts, and the compression springs are sleeved on the outside of the screw.

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