SU1188706A1 - Limiter of bulk level in reservoir - Google Patents

Abstract

LIMITER OF THE LIMIT LEVEL BULK OF LIQUID IN A TANK, containing a stop valve, IV /////// located in a housing installed on a receiving-distributing pipeline, and a pulsed overflow pipe, the end of which is installed at the level mark in the reservoir, characterized by , in order to increase reliability, the locking member is made in the form of a cup mounted for movement in a guide sleeve fixed on the receiving-dispensing pipe and spring-loaded relative to the body, and in the stack f provided with a central hole overlapping the spring-loaded valve connected to porschnem piston chamber above the piston cavity which is connected with an overflow pipe communicating with the inlet conduit receiving and dispensing through the float and the check valve. Y //////////////// f / A V

Description

The invention relates to the equipment of tanks used for storing oil and oil products, and in particular to means for protecting tanks from liquid overflows when it is pumped, and can be used in a tank farm and other sectors of the economy where technological operations are carried out to fill the tanks to a predetermined limit level.

These devices should ensure ¹ automatic termination of fluid access to the tank, equipped for pumping and pumping fluid with one receiving and distributing pipeline, upon reaching the maximum upper level of the fluid, including regardless of the shutdown of the transfer pump, and the possibility of subsequent pumping of the fluid is preferred without an additional drive impulse to a blocking receiving and distributing pipeline means (shut-off valve).

The purpose of the invention is to increase reliability.

The drawing shows a limiter limit level of filling.

The limiter contains a shut-off element 1, located in the housing 2, mounted on the receiving and distributing pipe 3, in communication with the reservoir 4. The limiter also contains a pulse overflow tube 5, the end of which is installed at the level mark in the reservoir 4. The shut-off element 1 is made in the form of a glass installed with the possibility of movement in the guide sleeve 6, which is fixed in the receiving and distributing pipe 3.

The cup of the locking member 1 is spring-loaded with a spring 7 to the housing 2 of the receiving and distributing pipe 3. In the cup of the locking member 1, a central hole 8 is made with an O-ring 9. The seat in the locking member 1 is provided with an O-ring 10.

The Central hole 8 is blocked by a valve 11 connected by a piston rod 12 to a piston 13 of the piston chamber 14, the piston cavity 15 of which is connected to the overflow pipe 5.

The overflow pipe 5 is in communication with the outlet pipe of the receiving and distributing pipe 3 through the check valve 16 and the float valve 17. The inner cavity of the sleeve 6 is communicated with an opening with the receiving and distributing pipe 3 to the shut-off element 1. The piston 13 is spring-loaded to the piston chamber housing 14.

The limiter works as follows.

₅ In the initial state, the piston 13 under the action of the spring 18 is in the upper position. The hole 8 in the glass of the locking element 1 is open. A glass under the action of the spring 7 is in the lower position than ⁰ due to decomposition of the open closure body 1. When injecting the liquid into the tank 4 through the conduit 3 priemnorazdatochny fluid pressure check valve 16 closes. After filling the tank 4 to a level where a pulse overflow pipe 5 enters the tank, fluid from the tank 4 enters it. The pressure of the liquid column in the tube 5 of the piston 13, overcoming the force of the spring 18, moves to its lowest position until the valve closes 11 cents; 0 of the hole in the cup of the shutoff 1, which causes an increase in pressure in the cavity of the sleeve 6, which, acting on the cup of the shutoff 1, moves it to the upper position until the seal 10 of the saddle of the locking member 1, thereby closing ⁵ the flow of fluid supplied through the receiving and distributing pipe 3.

If, after closing the shut-off valve 1, in the delivery and distribution pipe 3 to the shut-off valve 1, θ high pressure will remain (the pump continues to work), then the check valve 16 is held in this closed position by the fluid pressure, and liquid is prevented from flowing through the overflow pipe 5 into the reservoir 4.

⁵ If the pressure in the receiving and distributing pipe 3 to the shut-off element 1 is less than or equal to a column of liquid in the tank 4, then due to its own weight, the check valve 16 opens and the liquid

About from a pulse overflow tube 5 enters the receiving and distributing pipe 3 until the float valve 17 blocks its exit from the tube 5. If the pressure in the supra-piston chamber 14 is greater than or equal to the pressure in the cavity of the sleeve 6, then under the action of the spring 7 the cup of the locking element 1 goes into the lower position, thereby providing the possibility of pumping liquid from the tank 4. When pumping liquid from the tank 4 due to the fact that the impulse ⁰ tube 5 is blocked by a float valve 17, air is prevented from entering the suction th part of the pump.

Claims (1)

LIQUID FILLING LEVEL LIMITER IN A RESERVOIR containing a shutoff body located in a housing mounted on a receiving and dispensing pipeline and a pulse overflow pipe whose end is installed at a level mark in the tank, characterized in that, in order to increase reliability, a shutoff body made in the form of a glass mounted with the possibility of movement in the guide sleeve mounted on the receiving and distributing pipeline, and spring-loaded relative to the housing, and in the glass is made ENTRAL hole overlaps a spring-loaded valve piston coupled to the piston chamber, wherein the cavity above the piston is connected with an overflow pipe communicating with the inlet receiving and dispensing water through the pipeline with a float and the check valve. 90Z88H ^{,, D} AS 1 188706