Liquid feeding and draining one-way valve of urea liquid ammonia pump

Abstract

The invention discloses a liquid feeding and draining one-way valve of a urea liquid ammonia pump. The liquid feeding and draining one-way valve comprises a spring seat, a spring, a valve seat and a valve core, wherein the valve core is a multi-jaw valve core; the contact sealing surface between the valve core and the valve seat is a 45-degree conical sealing surface, an annular sealing groove is formed in the conical sealing surface of the valve core, and a rubber ring is embedded into the annular sealing groove; a plurality of guide jaw structures are arranged on the valve core, are in contact with an inner cavity of the valve seat, and can be slide in the inner cavity of the valve seat along the axial direction; a slide passage is arranged at the outer side of each guide jaw structure and has the same direction with the axial direction of the inner cavity, and a ball is embedded in each slide passage. The liquid feeding and draining one-way valve has the advantages that the one-way valve is applied to the technical field of urea production equipment, the defects of the prior art can be effectively overcome, the defects of inner leakage and untight sealing of the liquid feeding and draining one-way valve of the liquid ammonia pump can be effectively overcome, and the working efficiency of urea production equipment is effectively improved.

Description

technical field [0001] The invention relates to the technical field of urea production equipment, in particular to a one-way valve for liquid feeding and discharging of a urea liquid ammonia pump. Background technique [0002] Urea, also known as carbonamide, is a white crystal and is currently the nitrogen fertilizer with the highest nitrogen content. As a neutral fertilizer, urea is suitable for a variety of soils and plants. It is easy to store, easy to use, and has little damage to the soil. In industry, ammonia and carbon dioxide are used to synthesize urea under certain conditions. At present, with the development of technology, more and more urea production equipment appears on the market; correspondingly, the disadvantages of some urea production equipment are becoming more and more obvious. Those disadvantages have a certain impact on actual production, which can seriously lead to Final quality of urea. [0003] For example, 3W-2BA2 high-pressure liquid ammonia ...

AI Technical Summary

Problems solved by technology

In the production process, the failure rate of the inlet and outlet check valves of the liquid ammonia pump is very high, resulting in frequent shutdown of the equipment for maintenance; the labor intensity of the maintenance workers is high, the cost of spare parts is high, and the operation of the equipment is unstable, which often affects the production of urea

[0004] The technicians in the workshop analyzed the operating conditions and the damage of the liquid inlet and discharge check valves, and concluded that: internal leakage and poor sealing of the liquid inlet and discharge check valves are the main causes of equipment failure; correspondingly, the above The causes of internal leakage and poor sealing are that the valve plate is stuck and does not return after take-off, and the valve plate is cracked or broken; and the free fit gap between the valve plate and the spring is too large, coupled with the size deviation of the spring, the valve plate is affected by the pressure of the medium. After the top is opened and taken off, the spring is not positioned, and the spring is easily skewed after being compressed, causing the valve plate to be biased due to uneven force, and the joint with the valve cover is stuck and does not return, resulting in the backflow of the medium that is not tightly sealed.

[0005] To sum up, in the prior art, the inlet and outlet check valves of the liquid ammonia pump have defects of internal leakage and poor sealing, and corresponding technical improvements are needed

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