CN-118122739-B - Can eliminate fume chamber stand of vortex effect

CN118122739BCN 118122739 BCN118122739 BCN 118122739BCN-118122739-B

Abstract

The invention discloses an exhaust cabinet upright post capable of eliminating vortex effect, belonging to the technical field of laboratory equipment, wherein upright post components are symmetrically arranged at two sides of the exhaust cabinet, an experimental operation port is arranged between the two upright post components, the upright post components comprise a flow guide block, the guide block comprises first guide wings and second guide wings which are distributed in a stepped mode, first air passages which are distributed at intervals are arranged between the first guide wings and the second guide wings, and second air passages which are distributed at intervals are arranged between the second guide wings and the inner side wall surface of the experimental operation port. The air current of the side portion of the experimental operation port of the exhaust cabinet can be stably conveyed towards the inside of the exhaust cabinet body through the guide blocks on the upright post assembly, harmful gas is prevented from overflowing from two sides of the exhaust cabinet, the first air guide wings and the second air guide wings on the guide blocks can convey the air current into the exhaust cabinet body through two-stage treatment, and meanwhile vortex effects between the first air guide wings and the second air guide wings are eliminated through the first air passage and the second air passage, so that the harmful gas cannot overflow in a vortex area.

Inventors

HAO KAIXIN
QU XIANGDONG
CUI XIAOHUA
WANG JIABING
WANG MINGFENG

Assignees

浙江科恩实验设备股份有限公司

Dates

Publication Date: 20260512
Application Date: 20240418

Claims (10)

1. The exhaust cabinet upright post is characterized in that the upright post assembly comprises a guide block and an upright post main body, the guide block comprises a first air guide wing and a second air guide wing which are distributed in a stepped mode, first air passages which are distributed at intervals are arranged between the first air guide wing and the second air guide wing, second air passages which are distributed at intervals are arranged between the second air guide wing and the inner side wall surface of the experimental operation port, air passages are arranged in the upright post main body and are communicated with the first air passages and the second air passages, mounting grooves are formed in the upright post main body, guide blocks are arranged in the mounting grooves and are communicated with the air passages, the upright post main body is formed by transition of two continuous first cylindrical surfaces and second cylindrical surfaces, the first cylindrical surfaces and the air passages in the upright post main body are of concentric circular structures, the radius of the second cylindrical surfaces is larger than that of the first cylindrical surfaces, air flows coming out of the second air passages cling to the inner side surfaces of the experimental operation port, and enable air flows flowing out of the first air passages to drive external air flows to move towards the second air passages together.
2. The exhaust cabinet upright post capable of eliminating vortex effect according to claim 1, wherein the first wind guiding wing and the second wind guiding wing are streamline, one end of the second wind guiding wing far away from the first wind guiding wing is provided with a round platform, and the round platform protrudes towards the middle of the experimental operation port.
3. The exhaust cabinet upright post capable of eliminating vortex effect according to claim 2, wherein the first cylindrical surface is located at one side of the exhaust cabinet far away from the experimental operation port, the second cylindrical surface is located at one side of the exhaust cabinet near the experimental operation port, and the flow guiding block is installed at one side of the second cylindrical surface.
4. A fume hood stand according to claim 3, wherein transition cavities are provided between said gas passage and said first gas passage and between said gas passage and said second gas passage.
5. A fume hood column according to claim 3, wherein said column body comprises a first cylindrical surface and a second cylindrical surface, said first cylindrical surface being in transitional connection with said second cylindrical surface, said second cylindrical surface being in transitional connection with said first air guiding wing.
6. A fume hood column according to any one of claims 3 to 5, wherein the gas passage extends through the axial direction of the column body.
7. The exhaust hood stand column capable of eliminating vortex effect according to claim 1, wherein an included angle between the first air passage and the second air passage is 17 degrees to 22 degrees, and the second air passage is flush with the inner side wall surface of the experimental operation port.
8. A fume hood column according to claim 1, wherein said first air passage aperture is larger than said second air passage aperture.
9. The exhaust cabinet upright post capable of eliminating vortex effect according to claim 6, wherein the upright post main body is further provided with an air inlet hole, the air inlet hole is communicated with the air channel, and a static pressure cavity is arranged between the air inlet hole and the flow guide block.
10. The exhaust cabinet upright post capable of eliminating vortex effect according to claim 9, wherein a wedge block is further arranged in the gas channel, the wedge block is arranged on one side of the gas channel far away from the air inlet hole, and the aperture of the gas channel corresponding to the wedge block is gradually reduced from top to bottom.

Description

Can eliminate fume chamber stand of vortex effect Technical Field The invention relates to a laboratory exhaust cabinet structure, in particular to an exhaust cabinet upright post capable of eliminating vortex effect. Background The fume hood is an important pollutant control device in laboratories. During chemical experiments, some harmful gases are often generated. These gases escape into the air and will have an impact on the health of laboratory related personnel. Dangerous chemical experiments are mainly operated in the exhaust cabinet, once the pollutant control performance of the exhaust cabinet is unstable, the overflow risk of harmful gas is greatly increased, so that the leakage of the exhaust cabinet is an important guarantee for guaranteeing the safety of a laboratory, and the conventional exhaust cabinet cannot realize the effects of stable control and zero leakage of air flow in a cabinet door opening state. For example, chinese patent publication No. CN215466926U, publication No. 2022, 1 and 11, the name of the utility model is a wind supplementing type exhaust cabinet, the application discloses an exhaust cabinet structure, which comprises a cabinet body of the exhaust cabinet, a through opening is formed in the front side of the cabinet body of the exhaust cabinet, a lower air inlet component for exhausting air obliquely upwards is arranged at the bottom of the cabinet body of the exhaust cabinet, an upper air inlet component for exhausting air obliquely downwards is arranged at the bottom of the cabinet body of the exhaust cabinet, an air curtain can be formed at a ventilation opening of a cabinet door of the exhaust cabinet of the scheme, harmful gas is isolated in the interior of the exhaust cabinet, the safety performance is improved, but the risk of leakage of the harmful gas still exists, and the position of an opposite air wall is higher in flow velocity and lower in pressure, so that the harmful gas can easily move towards the cabinet door of the exhaust cabinet, and the risk of leakage of the harmful gas is increased. Disclosure of Invention The invention overcomes the risk that harmful gas is easy to leak in the experimental operation process of the existing exhaust cabinet, and provides the exhaust cabinet upright post capable of eliminating the vortex effect. In order to solve the technical problems, the invention adopts the following technical scheme that upright posts of the exhaust cabinet capable of eliminating the vortex effect are symmetrically arranged on two sides of the exhaust cabinet, an experimental operation port is arranged between the two upright post assemblies, the upright post assemblies comprise guide blocks, each guide block comprises a first air guide wing and a second air guide wing which are distributed in a step manner, first air passages which are distributed at intervals are arranged between the first air guide wings and the second air guide wings, and second air passages which are distributed at intervals are arranged between the second air guide wings and the inner side wall surfaces of the experimental operation port. The air current of the side portion of the experimental operation port of the exhaust cabinet can be stably conveyed towards the inside of the exhaust cabinet by the guide blocks on the upright post assembly, vortex generated on the inner side of the upright post is eliminated, harmful gas is prevented from overflowing from two sides of the exhaust cabinet, the first air guide wings and the second air guide wings on the guide blocks can treat and convey the air current to the inside of the exhaust cabinet in two stages, and meanwhile, the vortex effect between the first air guide wings and the second air guide wings is eliminated through the first air passage and the second air passage, so that the air current is stable and does not generate fluctuation, and the possibility that the harmful gas overflows in a vortex area is reduced. Preferably, the first wind guiding wing and the second wind guiding wing are streamline, and a round table is arranged at the end part of the second wind guiding wing. The first wind guiding wing and the second wind guiding wing are designed into streamline shapes according to the aerodynamic principle, so that the airflow is facilitated to move along the surfaces of the first wind guiding wing and the second wind guiding wing, harmful gas is prevented from leaking out, the round platform structure on the second wind guiding wing can improve the capturing effect of the wind guiding wing on the airflow, and the airflow flows along the surfaces of the wind guiding wings. Preferably, the upright assembly comprises an upright body, wherein a gas channel is arranged in the upright body and communicated with the first air channel, and the gas channel is communicated with the second air channel. The stand main part is hollow cylinder, be gas passage in the inside of stand main part, gas passage is used for letting