RU1793140C - Reservoir breathing device - Google Patents

Abstract

SUMMARY OF THE INVENTION: saddles and pressure and vacuum valves in the form of plates pivotally suspended on supports fixed to saddles are vertically mounted in the side walls of the housing. The supports are installed inside the housing and are made prismatic. Between the plates and supports mounted return springs pivotally mounted on them and supporting levers with wedge (sents interacting with the supports. Springs and levers are located at an acute angle to each other and to the vertical axis of the housing. 4 ill.

Description

The invention relates to equipment used to stabilize the production of sloth in storage tanks for oil and oil products in order to minimize losses of easily evaporating fractions by restricting the ventilation of their gas space.

A breathing apparatus for reservoirs is known, in the side walls of which the seats and pressure and pressure valves are vertically mounted in the form of plates pivotally suspended on supports fixed to the saddles.

A disadvantage of the known device is its low reliability under low temperature conditions.

The purpose of the invention is to increase the reliability of the device at low temperatures.

In FIG. 1 shows a respiratory device longitudinal axial section; in FIG. 2 is a view A in FIG. 1; in FIG. 3 - respiratory

a device for lowering the pressure in the tank; in FIG. And - the same, with excess pressure in the tank.

The respiratory device (Fig. 1,2) is installed on the storage tank for oil products (shown in thin lines in Figs. 1 and 2) and consists of a housing 1, on the side walls of which there is a saddle 2 of the rarefaction valve and, on the other, a saddle 3 pressure valves. Saddles 2 and .3 are equipped with slip rings 4 and 5, interacting with plates 6 and 7. On plates 6 and 7, support rods 9 and 10 are fixed by hinges 8. The upper wedge ends of the rods 9 and 10 are mounted in prismatic supports 11 and 12, respectively. The plates 6, 7 with supporting rods 9, 10 are mounted using return springs 13 and 14. The ends of the springs 13, 14 are pivotally mounted on the plates 6, 7 and supports 11, 12. The points 15, 16 for attaching the springs 13,14 to the supports 11.12 chosen so

With

WITH

H o

about

Ј o

that in the assembled form, the springs 13, 14 and the rods 9.10 are installed under sharp angles # i.02 to each other and form sharp angles / Ji and / 32 with the vertical axis 17 of the device:

Such orientation of the springs 13, 14 and the support rods 9, Yu provides a change in the point of application of the force of the springs in proportion to their stiffness and the angle of rotation of the plates in the prismatic supports; stabilization of the loading of plates at any point of their rotation while reliably holding the rods in the supports.

The angle of rotation of the poppet 6 of the rarefaction valve is controlled by a stop 18.

In the lower part, the housing 1 is equipped with a mounting flange 19. From the outside, the valves are protected by removable hinged visors 20 and 21.

The device operates as follows. - ;; - ;;; .- h -, :: ..; .-

When injecting oil or when the temperature rises in the gas space of the tank, excessive pressure occurs. The respiratory device (Fig. 3) by means of a spring 14 closing the valve 3-5-7, maintains the pressure at a predetermined level. If it exceeds the plate 7 under the action of excessive pressure in the tank, overcoming the loading force created by the springs 14, rotates in the prismatic support 11, connecting the gas space of the tank with the atmosphere, where the excess amount of gas is displaced. When the pressure in the tank drops, the spring 14 returns the plate 7 to its original position, separating the gas cavity of the tank with the atmosphere, thereby preventing its free ventilation and evaporation of the oil product.

When pumping oil or cooling it in the gas space of the tank, the pressure drops below atmospheric. However, under the action of the spring 13 plate

6, the vacuum valve will be pressed against the contact ring 4 for some time.

When the degree of rarefaction in the tank increases under the influence of atmospheric pressure, valve 2-4-6 opens, connecting

atmosphere with the gas space of the tank to fill it with air (Fig. 3). Upon reaching a predetermined pressure value in the reservoir, spring 13, having overcome atmospheric pressure, will return plate b to its original position, the vacuum valve will close, separating the gas space of the reservoir and the atmosphere.

Taking into account that the force of action of the springs on the valve plates does not change when the axis of the device deviates from the vertical, and the mass of the plates is insignificant, it can be argued that the proposed design is not sensitive to deviations from the horizontal position on

reservoir. ...-.

During maintenance and inspections of the device, it is enough to remove the hinged visors 15 and 16 to gain access to inspect the valves, clean and adjust their springs for the necessary overpressure and vacuum, - If necessary, by turning plates 7 of the pressure valve, you can access for inspection and cleaning the internal cavity of the housing 1, and

also inspect the state of the flame arrester, over which the respiratory

device. In case of valve repair, they

can be easily removed from supports 11,12 and can be

completely replaced by similar replacement ones. . :

Claims (1)

SUMMARY OF THE INVENTION A breathing apparatus for reservoirs, in which side seats and pressure and discharge valves are arranged vertically in the form of plates, hinged on supports mounted on saddles, in order to increase reliability under conditions x low temperatures, supports installed they are prismatic inside the casing, and return plates and pivoting arms with wedge ends interacting with the prismatic pivots are mounted pivotally between the plates and supports, and these springs and levers are at an acute angle to each other and to the vertical axis of the casing. & H % $ u / h and i .dv J OYSH