Automatic vacuum breaking stop control circuit for water ring vacuum pump
A water ring vacuum pump and control circuit technology, applied in the direction of machine/engine, etc., can solve problems such as unit damage, and achieve the effect of improving safety performance and simple operation
Pending Publication Date: 2018-06-22
ZHEJIANG JIANFENG PHARM CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide a water ring pump automatic break air shutdown control circuit to overcome the problem of damage to the unit due to misoperation in the prior art
Method used
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[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0018] Such as figure 2 Shown is the water ring vacuum pump automatic air breaking and shutdown control circuit according to the embodiment of the present invention, including a start-stop control circuit for controlling the start and stop of the water ring pump, including a fourth relay KA4 normally closed contact, one end of which is connected to the phase line L1 1. One end of the normally closed contact of the sixth relay KA6 and one end of the auxiliary normally open contact of the control protection switch 1KBO, and the other end is connected to zero through the third relay KA3 normally open...
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The invention discloses an automatic vacuum breaking stop control circuit for a water ring vacuum pump. The automatic vacuum breaking stop control circuit for the water ring vacuum pump comprises a start-stop control circuit for controlling the water ring pump to start and stop, wherein an electric contact vacuum gauge and a solenoid valve are correspondingly mounted on a vacuum pipeline; a solenoid valve control pipeline comprises a main stop button; when the main stop button is pressed, the solenoid valve is closed by attracting to start vacuum breaking; when the vacuum degree decreases to reach the upper limit of the electric contact vacuum gauge, the water ring pump is stopped through the start-stop control circuit; and when the vacuum degree decreases to reach the lower limit of the electric contract vacuum gauge, the solenoid valve is switched off. According to the automatic vacuum breaking stop control circuit for the water ring vacuum pump, a vacuum system can be automatic to perform vacuum breaking stop by one-time manual operation, so that the problem that a stop button is not directly pressed when vacuum breaking is not performed due to misoperation, resulting in destroyof a unit, can be effectively avoided; the operation is simple; the safety performance is greatly improved; the solenoid valve is powered off only after the vacuum degree reaches 0MPa, so that the problem that excessively small diameter of a vacuum breaking pipe leads to a balancing point formed between vacuum breaking of a motor and a storing tank and inlet gas, resulting in that the vacuum breaking cannot be completely performed, can be prevented.
Description
technical field [0001] The invention relates to the technical field of vacuum equipment, in particular to a control circuit for automatic break-through and shutdown of a water ring vacuum pump. Background technique [0002] The water ring vacuum pump is equipped with an eccentric rotor with fixed blades. It throws water (liquid) to the stator wall, and the water (liquid) forms a liquid ring concentric with the stator. The liquid ring and the rotor blades together form a variable volume rotary transformer. Positive displacement vacuum pump. In many processes of industrial production, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture resurgence and vacuum degassing, etc., water ring pumps are widely used. [0003] Such as figure 1 Shown is the two control circuits of the existing water ring vacuum pump, including the start and stop control circuit of the water ring pump, including the start button SG'...
Claims
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IPC IPC(8): F04C28/06F04C28/28
CPCF04C28/06F04C28/28
Inventor 吴广军沈泉郑昆武童小军
Owner ZHEJIANG JIANFENG PHARM CO LTD