Balance suspension system for controlling strength of folding glass door of biological safety cabinet

Abstract

The invention discloses a balance hanging system of biologically safe cabinet glass door, which comprises the following parts: movable pulley group, fast-pulley group, spring group and dragline, wherein the dragline is extended by movable pulley group and fast-pulley group anchored by spring when elevating or drawing down the glass; the left and right balancer realize random elevation and location of the glass according to the balance elementary. The invention increases the resistance of glass door switching, which avoids extra damage of error operation for operators completely.

Description

technical field [0001] What the present invention relates to is a kind of balance suspension system on the door of biological safety cabinet used on medical treatment, sanitation and pharmacy, more specifically, what the present invention relates to is a kind of balance suspension system used on the glass door of biological safety cabinet . Background technique [0002] Biological safety cabinet is a kind of biological experiment protection equipment used in scientific research institutes, hospitals and other experimental research institutions. The biological safety cabinet is the most basic and most important first line of defense in biological experiments. It can prevent the contamination of dangerous microorganisms during treatment. Gas overflow, but also to prevent indoor air from entering the operating platform in the cabinet, to protect experimental items from external interference. [0003] CN200430047816.7 discloses a left side view of a biological safety cabinet, i...

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Problems solved by technology

[0004] But similar biological safety cabinet glass door installation structures are mostly counterweight balance type, that is, as shown in accompanying drawing 1, this accompanying drawing is a kind of left view of biological safety cabinet of prior art, and wherein, casing side 1 , at or near the two top corners of the box, two pulleys 2 are set, and the traction rope 4 crosses the two pulleys. One end of the traction rope 4 is connected to the counterweight 3, and the other end of the traction rope 4 is connected to the front window glass 5. Generally, the counterweight installed at the rear of the cabinet is basically equal in weight to the front window glass. Although this setting has the advantages of easy opening and closing of the door and labor-saving advantages, due to the weight of the front window glass, frame and counterweight Gravity balance, therefore, once the front window glass is touched due to misuse, it is easy to break the gravity balance, and the front window glass is easy to open or close in a large way, and the large opening or closing of the front window glass will cause the protective air curtain to be damaged. damage, this method actually conflicts with the role of the safety cabinet

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