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CN-224229267-U - Self-adjusting wind speed exhaust pipeline for fume hood

CN224229267UCN 224229267 UCN224229267 UCN 224229267UCN-224229267-U

Abstract

The utility model provides an exhaust duct for a fume hood, which is capable of self-adjusting the wind speed, and comprises: compared with the prior art, the air pipe has the beneficial effects that the sponge sleeve I and the sponge sleeve II on the rotating shaft continuously absorb lubricating oil to continuously lubricate the bearings on the upper side and the lower side by arranging the upper bearing cap and the lower bearing cap to be matched with the rotating shaft, so that the rotating shaft can always maintain higher rotation freedom degree, the capability of losing imbalance caused by rust corrosion or dust accumulation and blocking easily in a wet dust-containing environment is avoided, and the sponge sleeve I and the sponge sleeve II also have a certain isolation effect, so that water vapor and dust are difficult to enter the bearings, and the whole control valve can flexibly operate.

Inventors

  • WANG DI
  • LI RU

Assignees

  • 哈尔滨拜仑斯特临床营养有限公司

Dates

Publication Date
20260512
Application Date
20250620

Claims (8)

  1. 1. The self-wind speed-adjusting exhaust pipeline for the fume hood comprises an air pipe (100), and is characterized in that a control valve (200) is movably arranged in the air pipe (100) and used for controlling the air flow speed in the air pipe (100), a plurality of upper bearing caps (110) are arranged on the upper side of the air pipe (100), and a plurality of lower bearing caps (120) are arranged on the lower side of the air pipe (100); The control valve (200) comprises a first valve plate (210), a second valve plate (220) and a third valve plate (230), wherein the first valve plate (210), the second valve plate (220) and the third valve plate (230) are rotatably arranged inside the air pipe (100) in sequence from left to right, the first valve plate (210), the second valve plate (220) and the third valve plate (230) are rotatably arranged inside the air pipe (100) through a rotating shaft (211), and a transmission connecting rod (240) for driving the first valve plate (210) and the third valve plate (230) to rotate along with the second valve plate (220) is respectively arranged between the front sides of the first valve plate (210), the second valve plate (220) and the rear sides of the second valve plate (220) and the third valve plate (230).
  2. 2. The self-adjusting wind speed exhaust duct for a fume hood according to claim 1, wherein a knob (111) is screwed to the top of the upper bearing cap (110) and the bottom of the lower bearing cap (120) for blocking the oil filling hole and the exhaust hole, respectively, and a partition plate (112) is provided inside the upper side of the upper bearing cap (110).
  3. 3. The self-adjusting wind speed exhaust duct for fume hood according to claim 2, wherein the upper portion of the partition plate (112) of the upper bearing cap (110) is provided with an oil storage chamber, and a rotation hole is provided in the middle of the partition plate (112) for rotation connection with the upper end of the rotation shaft (211).
  4. 4. The exhaust duct for self-regulating wind speed for fume hood according to claim 3, wherein the upper end of the rotating shaft (211) is provided with an oil filling hole (213) downwards, the lower end of the oil filling hole (213) does not penetrate through the lower end of the rotating shaft (211), the upper outer wall of the rotating shaft (211) is provided with an inclined oil duct I (214) obliquely upwards, and the inner end of the inclined oil duct I (214) is communicated with the upper part of the oil filling hole (213).
  5. 5. The self-adjusting wind speed exhaust pipeline for fume hood according to claim 4, wherein the outer wall of the upper side of the rotating shaft (211) is sleeved with a first sponge sleeve (212), the first sponge sleeve (212) does not rotate along with the rotating shaft (211), and the lower end of the first inclined oil duct (214) is arranged in the first sponge sleeve (212).
  6. 6. The exhaust pipe (100) for fume hood self-regulating wind speed according to claim 1, wherein a fixing hole (215) is formed in the middle of the rotating shaft (211) in a backward penetrating way, and an inner screw groove (216) is formed on the inner wall of the fixing hole (215).
  7. 7. The self-wind speed regulating exhaust pipeline for fume hood according to claim 4, wherein the lower end of the oil filling hole (213) is provided with a second inclined oil duct (217) towards the direction of the inclined lower side of the outer wall of the rotating shaft (211), and the upper end of the second inclined oil duct (217) is flush with the bottom of the oil filling hole (213).
  8. 8. The self-adjusting wind speed exhaust pipeline for fume hood according to claim 7, wherein the outer wall of the lower end of the rotating shaft (211) is sleeved with a second sponge sleeve (218), the second sponge sleeve (218) does not rotate along with the rotating shaft (211), the second sponge sleeve (218) is arranged in the upper side of the lower bearing cap (120), and the outer end of the second inclined oil duct (217) is arranged in the second sponge sleeve (218).

Description

Self-adjusting wind speed exhaust pipeline for fume hood Technical Field The utility model belongs to the technical field of ventilation equipment, and particularly relates to an exhaust pipeline capable of automatically adjusting wind speed for a fume hood. Background In the existing exhaust pipeline for the fume hood, the rotary shaft of the air valve is easy to rust and erode or dust accumulation and is blocked in a wet dust-containing environment, so that the capability of disorder is lost, and the problem brings various disadvantages. Firstly, after the rotation shaft is corroded or blocked, the opening and closing angle of the air valve cannot be flexibly adjusted, so that the air discharge quantity is difficult to accurately control according to actual requirements, and the ventilation effect and experimental safety are affected. Secondly, a long-term malfunctioning damper may lead to local airflow disturbances, increasing the risk of harmful gas leakage, threatening the health of the operators. These disadvantages are mainly due to the fact that the fume hood working environment is usually accompanied by higher humidity and suspended particulate matter in the air, the combined action of moisture and dust accelerates the oxidation of the surface of the metal rotating shaft to form a rust layer, and meanwhile dust is accumulated to form a mechanical obstruction, so that the rotating shaft is finally blocked or even completely blocked. Conventional treatment methods comprise the steps of periodically disassembling and cleaning the rotating shaft, smearing rust-proof grease, adopting stainless steel materials to replace common carbon steel materials and the like, but the methods have the defects. For example, frequent disassembly and cleaning can significantly increase maintenance workload and cost, rust-preventive grease can slow down corrosion speed but may fail in high temperature or chemical corrosion environment, and replacement of stainless steel material can greatly increase manufacturing cost and still cannot completely avoid dust accumulation problem although corrosion resistance is improved, so that it is desirable to design an exhaust duct with a novel structure to solve the problem. Disclosure of utility model Aiming at the defects in the prior art, the utility model aims to provide an exhaust pipeline for self-regulating wind speed for a fume hood, and solves the problems in the prior art. The utility model is realized by the following technical scheme that the exhaust pipeline for the fume hood, which is used for self-adjusting the wind speed, comprises an air pipe, wherein a control valve is movably arranged in the air pipe and used for controlling the air flow speed in the air pipe, a plurality of upper bearing caps are arranged on the upper side of the air pipe, and a plurality of lower bearing caps are arranged on the lower side of the air pipe; The control valve comprises a valve plate I, a valve plate II and a valve plate III, the valve plate I, the valve plate II and the valve plate III are sequentially rotatably arranged inside an air pipe from left to right, the valve plate I, the valve plate II and the valve plate III are rotatably arranged inside the air pipe through a rotating shaft, a transmission connecting rod for driving the valve plate I and the valve plate III to rotate along with the valve plate II is respectively arranged between the front sides of the valve plate I and the valve plate II and between the rear sides of the valve plate II and the valve plate III, in actual use, the upper end of a rotating shaft on the valve plate II upwards penetrates through the top of the air pipe and is in sealed rotation connection with the valve plate I, a part of the extending rotating shaft is connected with a driver arranged on the top of the air pipe, a servo motor and a right-angle speed reducer are arranged in the driver to drive the rotating shaft on the valve plate II anticlockwise or clockwise, so that the effect of opening or closing is achieved, an upper bearing cap is also arranged on the upper side of the rotating shaft on the valve plate II, but the upper end of the rotating shaft upwards penetrates through an upper bearing cap arranged on the top of the air pipe, other structures are identical to the upper bearing caps arranged on other positions, the penetrating parts are connected in a sealing connection mode, and are filled in an oil filling mode, part of the penetrating part can be connected, an oil filling cap, and a driver can be arranged at the bottom of a driver is arranged at the bottom of a hose, and a hose side of a driver is reserved. As a preferable implementation mode, the top of the upper bearing cap and the bottom of the lower bearing cap are respectively in threaded connection with a knob for blocking the oil filling hole and the discharge hole, and a baffle plate is arranged inside the upper side of the upper bearing cap. As a preferable implementatio