Diaphragm-type breather valve

Abstract

The invention belongs to the filed of valves and particularly relates to a diaphragm-type breather valve. The diaphragm-type breather valve comprises a valve shell, a valve core and a diaphragm sheet. The diaphragm-type breather valve is characterized in that the valve core is matched with the valve shell in a screwing way; the diaphragm sheet is arranged at a part where the valve core is connected with the valve shell; a through hole is arranged at the middle part of the valve core; a concave groove is arranged between the through hole and the external wall of the valve core; a plurality of pores are arranged on the diaphragm sheet which corresponds to a sunken part of the concave groove; and a plurality of second pores are also arranged around the bottom of the valve housing. The diaphragm-type breather valve is mainly arranged at the bottom of a control cabinet; the control cabinet is a sealed space; when equipment in the control cabinet is started, the air pressure is higher than outside atmospheric pressure, therefore, the diaphragm sheet is forcibly separated from the valve core so as to achieve the balance of the internal air pressure and the external air pressure; when the equipment stops working, the internal air is contracted, and the certain negative pressure is generated relative to the outside atmospheric pressure, and the diagraph sheet is forcibly inwards sunken by the outside atmospheric pressure so as to achieve the seal together with the lower end surface of the through hole at the middle part of the valve core, and as a result, outside gas cannot flow in.

Description

Technical field [0001] The invention belongs to the field of valves, and specifically is a diaphragm type breathing valve. Background technique [0002] In the pharmaceutical, chemical and other industries, many equipment need to install integrated circuit boards and other precision control instruments to control the production process. Due to the particularity and complexity of the environment, many environments are characterized by acidic or alkaline and humid gases, which are far beyond the tolerance of the control instrument. The precision control instrument must be installed in a closed control cabinet to isolate it. Contact with the outside atmosphere, otherwise it will be damaged immediately in a short time. At the same time, because many devices generate heat when they are in use, a large amount of condensate will be generated on the wall of the airtight container. If it is not eliminated, the integrated circuit board and other precision control instruments will be burnt...

AI Technical Summary

Problems solved by technology

At the same time, because many devices need to generate heat when they are in use, a large amount of condensed water will be generated on the wall of the airtight container. If it is not eliminated, it will have serious consequences such as integrated circuit boards and other precision control instruments burned.

The popular solution in the market is to wrap the material of the closed space container with plastic with good heat insulation performance or wrap the outer surface of the closed space container with asbestos and other good heat insulation materials. This solution actually has great disadvantages: any electronic components There is a certain use range for the temperature. If the temperature is exceeded, its service life will be greatly affected or it will not be used at all.

Because electronic components and equipment will generate heat during use, but the outside cannot dissipate it, resulting in a rise in temperature. When the temperature rises to a certain value, some will have serious consequences of direct burning

Therefore, many manufacturers have to adopt imported electronic components with higher temperature resistance or move the controller outside the workshop, which greatly increases the cost of use; at the same time, it will undoubtedly increase the cost of use of users and make manufacturers lose competitiveness.

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