Powder tank safety valve, powder tank and stirring station

Abstract

The invention discloses a powder tank safety valve, a powder tank and a stirring station. The powder tank safety vale is arranged in a pressure-release port of the powder tank and comprises a positive pressure cover plate covering the pressure-release port. The positive pressure cover plate is attracted to a positive pressure cover plate magnet of the pressure-release port, the positive pressure cover plate magnet is fixedly connected with the powder tank, one end of a positive pressure cover plate limiting retaining rod is fixedly connected with the powder tank, and the other end of the positive pressure cover plate limiting retaining rod extends outwards. The positive pressure cover plate can move along the positive pressure cover plate limiting retaining rod. A limiter is arranged at the other end of the positive pressure cover plate limiting retaining rod. The powder tank safety valve can be instantly switched in the maximum travel when internal pressure of the powder tank is larger than the opening pressure. A valve bonnet of the safety valve is less prone to staying at certain position within a short travel, and pressure release within a short time is facilitated. The powder tank safety valve is large in opening travel and not easy to plug, threaded connection is reduced, and probability of damage to other parts due to bolt loosening is decreased.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a powder tank safety valve, a powder tank and a mixing station. Background technique [0002] The powder tank is an indispensable part of the mixing plant. With the rapid development of cement concrete technology, the requirements for environmental protection and safety factor of the mixing plant are getting higher and higher. During the use of the powder tank of the mixing station, in order to meet the safety performance requirements, a pressure relief port must be opened at a suitable position of the powder tank, and a pressure safety valve device must be installed at the pressure relief port. When the pressure in the tank exceeds a certain threshold, the pressure safety valve opens, and the pressure is released through the pressure relief port to release the excessive pressure in the powder tank to protect the safety of the powder tank silo. If the pressure safety valve f...

AI Technical Summary

Problems solved by technology

[0004] 1. The spring-type pressure safety valve is a micro-opening safety valve. With the increase of the pressure in the powder tank, the valve cover is lifted up. During the lifting process, limited by the action of the spring, with the opening of the valve cover As the distance increases, the spring force it receives is also greater, so the pressure inside the powder tank can only make the valve cover open a small stroke, which often results in the powder tank not being able to release the pressure in a short time, and this opening stroke The small micro-opening pressure safety valve is very easy to block after being wet;

[0005] 2. The self-weight safety valve has a critical state where the internal opening pressure is balanced with its own gravity. When the internal opening pressure is equal to its own gravity, the valve cover will stagnate at a certain position, and the stroke of this critical state position is less than the maximum of the safety valve. Due to the opening stroke, the safety valve cannot be fully opened and the pressure cannot be fully released, and the opening stroke is small, and sometimes it cannot be automatically reset due to the existing safety valve structure;

[0006] 3. The bonnet and connecting piece of the self-weight pressure safety valve are threaded, and it is very inconvenient to carry out regular inspection and maintenance. If the connecting bolt falls off and fails, the connecting piece and the limit piece will fall off the bonnet and fall into the silo, and the It is difficult to take out the silo, and the connecting parts and limit parts left in the silo can easily cause damage to the powder screw conveyor

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