CN111043363A

CN111043363A - Pressure regulating safety valve of pressurizing equipment

Info

Publication number: CN111043363A
Application number: CN201911291314.0A
Authority: CN
Inventors: 王晓景; 何晋勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-04-21

Abstract

Safety valves are important industrial components for ensuring safe and economical operation of equipment. When the pressure in the pressurizing equipment or the pipeline exceeds the set pressure of the safety valve, the pressure relief is automatically started, the pressure in the equipment and the pipeline is ensured to be below the set pressure, the equipment and the pipeline are protected, and accidents are prevented. The existing safety valve has a complex structure, 30-40 parts are provided, and the existing safety valve generally comprises vulnerable accessories such as a guide valve film, a sealing gasket and the like, and a sealing surface is ground and processed by a special safety valve grinding machine to achieve high flatness and high smoothness, so that leakage and opening faults caused by defects such as scratches, pits, cracks, corrosion and the like are prevented. The application provides a simple structure, and the part is few, does not contain vulnerable accessory such as case, valve clack, and the sealed face allows defects such as general mar, pock, crackle, unevenness, roughness, easily adjusts opening pressure, need not external power, can open the pressure release automatically when equipment superpressure, the pressure regulating relief valve of automatic recovery.

Description

Pressure regulating safety valve of pressurizing equipment

Technical Field

The application relates to a pressure regulating safety valve of a pressurizing device, belongs to the field of environmental protection purification and safety devices, and particularly relates to the pressurization catalytic treatment of organic contaminated soil and organic solid waste. The device can also be used as a pressure regulating safety valve of other suitable equipment.

Background

Safety valves are important industrial components for ensuring safe and economical operation of equipment. When the pressure in the pressurizing equipment or the pipeline exceeds the set pressure of the safety valve, the pressure relief is automatically started, the pressure in the equipment and the pipeline is ensured to be below the set pressure, the equipment and the pipeline are protected, and accidents are prevented. The existing safety valve has a complex structure, 30-40 parts are provided, and the existing safety valve generally comprises vulnerable accessories such as a guide valve film, a sealing gasket and the like, and a sealing surface is ground and processed by a special safety valve grinding machine to achieve high flatness and high smoothness, so that the leakage and opening faults caused by the defects such as scratches, pits, cracks, corrosion and the like are prevented, the waste of resources and energy is prevented, and the leakage-free and safe factory work of enterprises is influenced. For example, after a valve core and a valve clack of a safety valve of certain equipment are replaced, a sealing surface is ground and repaired by a grinding machine, leakage is found when the pressure of the safety valve is checked after a unit is normally started, the leakage cannot be solved by adopting various methods, and finally, the safety valve is overhauled again. The flatness of the sealing surface of the safety valve is found to be not up to the standard, and the economic loss is more than 200 ten thousand yuan.

Disclosure of Invention

The application provides a simple structure, and the part is few, does not contain vulnerable accessory such as case, valve clack, and the sealed face allows defects such as general mar, pock, crackle, unevenness, roughness, easily adjusts opening pressure, need not external power, can open the pressure release automatically when equipment superpressure, the pressure regulating relief valve of automatic recovery. The drying agent comprises a rock wool shell, a spring support, a spring, a piston, a lead, a small pulley, a water-containing sponge, snail mucus, an open-pore steel sheet, a flexible ring sleeve and a drying agent wrapped by a hydrophilic filter membrane, wherein pressure relief holes are formed in the rock wool shell and the steel sheet, the flexible ring sleeve is arranged between the inner pressure relief hole and the outer pressure relief hole, drainage holes are simultaneously formed in the steel sheet, and the drying agent wrapped by the hydrophilic filter membrane is filled in the holes. Wherein, the rock wool shell and the open-pore steel sheet can be replaced by ceramic and other materials, the water-containing sponge can be replaced by other flexible water-absorbing materials, and the snail mucus can be replaced by other reversible adhesives.

In the device shown in fig. 1, one end of the spring is fixed on the bracket, and the other end is connected with the piston. The water-containing sponge is arranged between the piston and the right baffle, the small pulley is arranged above the baffle, and the piston is connected with a lead wire and is connected with the perforated steel sheet through the small pulley. Snail mucus is arranged between the perforated steel sheet and the rock wool shell of the device. The rock wool shell (inner) and the steel plate (outer) are provided with pressure relief holes, a flexible ring sleeve is arranged between the inner pressure relief hole and the outer pressure relief hole, and two ends of the flexible ring sleeve can be fixed by small iron rings. And water drainage holes are simultaneously formed in the steel sheet, and drying agents wrapped by hydrophilic filter membranes are filled in the holes.

When the device works, waste gas generated by the pressurizing device pushes the piston to move rightwards, meanwhile, the lead wire connected with the piston moves rightwards along with the piston, when the piston moves to a set position (corresponding to pressure relief pressure), the water-containing sponge is extruded, water flows into snail mucus between the steel sheet and the rock wool shell, the snail mucus is diluted and loses viscosity, the steel sheet freely slides down, the pressure relief holes in the steel sheet are aligned with the pressure relief holes in the rock wool shell, and the waste gas is relieved through the flexible ring sleeve between the pressure relief holes. After pressure relief, the spring retracts to drive the piston to move left, and the sponge containing water above the piston is not pressed any more and is naturally recovered. The lead wire connected with the piston pulls the steel sheet to move upwards, the two pressure relief holes and the flexible ring thereof are staggered, and the pressure relief is stopped. The water contained in the snail mucus is gradually absorbed by the desiccant through the hydrophilic filter membrane, and the snail mucus gradually dries and solidifies to recover viscosity and is sealed.

The beneficial effect of this application is: the pressure regulating safety valve has simple structure, does not need a sensor and a control circuit, does not contain vulnerable accessories such as a guide valve film, a sealing gasket and the like, is easy to process, and can regulate the opening pressure only by regulating the width of the water-containing sponge in the device. Because the fluidity of the snail mucus can fill the defect of the sealing surface, the sealing surface does not need high flatness and high smoothness, and the defects of common scratches, pockmarks, cracks and the like are allowed.

Description of the drawings:

fig. 1 is a pressure regulating safety valve of a pressure device of the present application.

Fig. 2 is a partially enlarged view of the periphery of the pressure relief hole.

Example (b):

collecting artificially-bred white jade snail, stopping water supply and food supply, and allowing the snail to gradually form a mucous membrane at the shell opening. The mucous membrane is collected, taking care to avoid bringing in excrement. Adding a small amount of water to dissolve into snail mucus, and adding into the device shown in figure 1. Steel sheet drilling with general defects (scratches, pits, cracks, etc.) is used as the sealing surface. And (3) coating a calcium chloride drying agent on a hydrophilic filter membrane filled with the water discharge holes on the steel sheet by adopting a hydrophilic polyvinylidene fluoride (PVDF) 0.45-micron filter membrane, and waiting for several minutes after the drying agent is filled to dry and seal the snail mucus edge. Subsequently, the pressure-catalyst apparatus was started and the design operating pressure was 0.5 MPa. The width of the water-containing sponge in the device is adjusted, so that when the pressure exceeds a set value (for example, 0.55 Mpa), the displacement of the piston starts to extrude the water-containing sponge, the snail mucus is diluted, the sealing surface of the steel sheet is loosened and slides downwards, the pressure relief holes in the steel sheet are aligned with the pressure relief holes in the rock wool shell, and the waste gas is relieved through the flexible ring sleeves among the pressure relief holes. After pressure relief, the spring retracts to drive the piston to move left, and the sponge containing water above the piston is not pressed any more and is naturally recovered. The lead wire connected with the piston pulls the steel sheet to move upwards, the two pressure relief holes and the flexible ring thereof are staggered, and the pressure relief is stopped. The water contained in the snail mucus is absorbed by the desiccant through the hydrophilic filter membrane within several minutes, and the snail mucus gradually dries and solidifies, recovers viscosity and is sealed. When the device is operated, the emptied rubber balloon is used for wrapping the device, so that the device has no leakage and good sealing property when the pressure of equipment is lower than the pressure relief starting pressure.

Claims

1. A pressure regulating safety valve comprises a rock wool shell, a spring support, a spring, a piston, a lead, a small pulley, a water-containing sponge, snail mucus, an open-pore steel sheet, a flexible ring sleeve and a drying agent wrapped by a hydrophilic filter membrane, wherein pressure relief holes are formed in the rock wool shell and the steel sheet, the flexible ring sleeve is arranged between the inner pressure relief hole and the outer pressure relief hole, drainage holes are simultaneously formed in the steel sheet, and the drying agent wrapped by the hydrophilic filter membrane is filled in the holes.

2. A pressure regulating safety valve as claimed in claim 1, wherein the rock wool shell and open-cell steel sheet are replaced by ceramic, the water-containing sponge is replaced by other flexible water-absorbing material, and the snail mucus is replaced by other reversible adhesive.