RU2165558C1 - Breathing valve - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: breathing valve is designed for sealing of gas space of reservoirs filled with petroleum and petroleum products and for adjustment of pressure and vacuum within preset limits. Breathing valve for reservoirs with petroleum products and chemical liquids has body, working chamber and gate coupled to membrane by means of connecting element. Valve is provided with auxiliary pressure gate coupled to membrane and with vacuum gates disconnected from membrane. Plates of pressure and vacuum gates are mounted on levers fitted with magnetic locks designed to provide for required load on plate along with rising intravalve pressure. Gates have auxiliary holes positioned opposite to cut-off part along gate perimeter. Flexible cut-off parts are shaped as an arc contacting gate seals. Flexible cut-off parts are capable of taking the form of their mirror position at the same time being in contact with gate seats. Breathing valve body is provided with holes for installation of preliminarily adjusted pressure and vacuum modules. The latter are fitted with lever devices for changing the force required for gate operation. Pressure cut-off holes are directed similarly inside gas space of reservoirs. Pressure plates are positioned identically from side of internal gas space of reservoir. The invention provides for pulsed operation of valve gates and for reduction of petroleum product losses in process of storage due to improved sealing of gates. EFFECT: enhanced efficiency. 2 dwg

Description

 The device relates to the equipment of tanks in the oil, oil refining and petrochemical industries and is intended for sealing the gas space of tanks with oil and oil products in order to regulate pressure and vacuum within specified limits.

 Known breathing valves containing a housing, a working chamber, a shutter connected by communication with a membrane, for example, the NDKM-350 valve, passport, 1982, p. 5 - prototype.

 The disadvantage of these valves is poor sealing of the gas space of the tanks, which leads to the loss of petroleum products and environmental pollution, as well as the inconvenience of mounting, dismantling, assembling and monitoring settings for a given mode of operation of the valves outside the valve.

 The objective of the invention is to reduce the loss of petroleum products during storage by improving the sealing of gates.

 The technical result that can be obtained by carrying out the invention is the pulse operation of the valve gates, which allows the air-vapor mixture in the upper part of the tank to settle on the walls, condense and drain from the walls and roof of the tank.

 The proposed valve is equipped with an additional pressure shutter connected to the membrane and vacuum shutters not connected to the membrane. The plates of pressure and vacuum locks are mounted on levers equipped with magnetic locks, adjusting to provide the necessary load together with the valve pressure increasing on the plates inside. The gates are provided with additional holes located opposite the bolt part around the perimeter of the shutter. The elastic gate portions are in the form of an arc in contact with the valve seats and are adapted to take the shape of a mirror position while being in contact with the seats, which provides neutralization of the magnetic lock and impulse valve depressurization. Holes are made in the valve body for installing pre-configured valve modules of pressure and vacuum, which are triggered by increasing pressure or with excessive vacuum. The modules are equipped with lever devices with the ability to change the force for actuating the shutters. In this case, the pressure shut-off holes are equally directed into the gas space of the tank, and the pressure plates are installed equally from the side of the gas inside the tank, which makes it possible to set up the necessary load on the plates together with the increasing intra-valve pressure. The valve is depicted in FIG. 1 and 2.

 The valve comprises a housing 1 with modules 14 installed in its openings 13, containing lever devices 7 together with shutters 3, magnetic locks consisting of magnets 8 and plates 9. The valve also contains a membrane 5, communication 4 with pressure shutters 3, and vacuum shutters 6 ( not disclosed in the drawing, but also made in the form of modules installed in the holes 13 of the housing 1, pre-configured to work in predetermined modes). In the valves 3 pressure made additional holes 10 (Fig. 2). The elastic gate portions 11 are in the form of an arc in contact with the seats 12.

 The valve operates as follows.

 The initial position of the pressure locks 8 and the vacuum locks 6 is closed. In this case, the elastic gate parts 11 are in contact with the edges of the seats 12. Magnetic locks create the necessary load on the valves, this is achieved by isolating the internal contents of the tank.

 With increasing pressure in the tank, the clamping force of the shutters 3 on the seats 12 increases, improving their tightness, and at the same time, the membrane 5, having an area larger than the area of the pressure plates, begins to rise and, using a flexible connection 4 and levers 7, opens the shutters 3. Around the shutters 3 are located additional openings 10, which are connected with the internal volume of the valve and, correspondingly, to the reservoir; therefore, an increase in pressure also affects the elastic shutter parts 11, which, under the action of pressure, remain in contact with the seat ami 12, since they have the shape of an arc and are configured to take the form of a mirror position.

 This ensures the neutralization of the magnetic lock and pulse depressurization of the gates. First, the tank does not depressurize, because, when opening, the gates 3 raise the levers 7, increasing the gap between the magnet 8 and the plate 9. At a certain moment, the force from the magnet 8 drops sharply, and the membrane 5, having overcome the resistance of the gates 3, sharply pushes them by opening the passage of gases from the tank. Since the weight of the valves 3 with levers 7 is negligible, the membrane 5 will keep them in suspension. After equalizing the pressure, the closures 3 are closed and additionally fixed with magnetic locks.

 If a vacuum arises in the tank below the calculated one, the external pressure, having overcome the force of the magnets, will open the vacuum shutters 6 for the passage of air into the tank.

Claims (1)

 A breathing valve for reservoirs with petroleum products and chemical liquids, comprising a housing, a working chamber, a valve connected to the membrane, characterized in that the valve is equipped with an additional pressure valve connected to the membrane, and vacuum valves not connected to the membrane, while the valve plates pressure and vacuum are mounted on levers equipped with magnetic locks, adjusting the necessary load together with increasing intra-valve pressure on the plates, the valves are equipped with an additional with holes located opposite the gate part around the perimeter of the shutter, the elastic gate parts have an arc shape in contact with the valve seats and are adapted to take the form of a mirror position, while being in contact with the valve seats, holes for installing pre-configured valve modules are made in the valve body pressure and vacuum, equipped with lever devices with the possibility of changing the force for actuating the valves, while the pressure relief holes are the same ovo are directed into the gas space of the tank, and pressure plates are installed identically from the side of the gas chamber of the tank.

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