SU1177716A1 - Device for liquid sampling - Google Patents

Abstract

1. A device for sampling liquid samples from tanks, mainly oil and oil products, containing a submerged chamber with an inlet valve for filling it with a sample, a compressed air supply system and displacing the sample to the top, pneumatic control bodies for valves, and in order to expand the functionality and increase the productivity of the device, the camera is equipped with a horizontal partition with a bypass valve installed on it and installed in The upper part of the chamber is equipped with an inlet valve, and the compressed air supply system and the sample displacement upward are made in the form of two coaxial elastic elastic pipes of the drain valve and drum, while the outer tube is connected to the compressed air supply system and the pneumatic control unit of the valve, and is rigidly attached to the chamber, internally connect There is no drain valve, the lower ends of both pipes are connected with the bottom one (with a chamber cavity and the upper ones are equipped with a coupling mounted on the drum, 2. The device according to claim 1, which is lower than the chamber cavity 5-7 times the volume of its upper cavity. 1 h H 0

Description

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The invention relates to a technique for sampling point and pooled fluid samples from predetermined levels, npeiiMy essential oil and petroleum products from vertical tanks, and can be used to control the quality of these fluids in accordance with the requirements of standards.

The aim of the invention is to enhance the functionality and increase the performance of the device.

The drawing shows the device, the overall appearance.

The device contains a submersible chamber 1, the cavity of which is divided by po height into two, unequal in volume

parts horizontal partition 2, and the volume of the lower cavity of the chamber 1 is significantly larger than the volume of its upper cavity.

In the upper part of the housing of the chamber 1 there is an inlet valve 3, and in the horizontal partition there is an overflow valve 4. The bottom of the chamber 1 is conical and has a drain valve 5. Inside the chamber 1 there is an organ of pneumatic control of valves, made in the form of a hollow cylinder 6, along its axis a movable rod 7 passes with a piston 8 which is rigidly fixed in its central part and a spring 9 spring-loaded from above. Valves 3 and 4 are fixed to the free ends of the rod 7 extending beyond the limits of the cylinder 6 through the sealing glands 10 us on the opposite action.

Inside and outside the chamber 1, two elastic, non-creased pipes 11 and 12, which from the lower ends communicate with the lower cavity of the chamber 1, pass through one into the other, and the pipe 11 in the area inside the chamber 1 has a nozzle 13 through which it simultaneously communicates with a cylinder cavity 6.

Both pipes in the upper part have a cross-section and through the gland sealing sleeve 14 are connected to a rotating drum 15 with the possibility of their winding and winding during immersion and lifting of the chamber 1, respectively. On the surface of the drum 15 there is a screw chute 16 for regular stacking of vitcose; on the ribs of the chute 16 there is a scale of 17 for

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the immersion depth of the chamber 1 is measured. The upper ends of the pipes 11 and 12 are equipped with rigid tips 18 and 19, and the pipe 11 can be connected to the compressed air source and the atmosphere through the split pipe 20, having taps 21 and 22, respectively. - with capacity for selected samples.

The device works as follows.

In the initial position, the elastic pipes 11 and 12 are wound on the drum 15 and the chamber is above the surface of the liquid filling the reservoir. The piston 8 spring 9 is pressed down. The inlet valve 3 is closed, the bypass valve 4 is open. Cranes 5, 21, 22 and 23 are closed.

In order to take point samples by rotating the drum 15, the chamber 1 is immersed in a tank with liquid. Upon reaching a predetermined depth (level), the valve 21 is opened and compressed air is supplied through pipe 11 through pipe 11, which enters the lower cavity of chamber 1 and simultaneously through pipe 13 into cylinder 6 cavity. Under the action of compressed air, piston 8 is pressed up, valve 4 is closed , the valve is opened and the first fluid sample from this level enters the upper chamber cavity. Air from the upper cavity of chamber 1 is expelled by the same fluid through the open valve 3 to the reservoir.

After filling with the liquid, the upper cavity of the chamber 1 closes the valve 21 and opens the valve 22, as a result of which the pressure in the lower cavity of the chamber 1 and in the cylinder 6 decreases to atmospheric, the piston 8 is spring down 9, the valve 3 closes, the valve 4 opens and the first liquid sample flows into the lower cavity of chamber 1, displaces part of the air through the open valve 4 into its upper cavity.

Next, the chamber 1 is loaded to the next level, on reaching which the valve 22 is closed, after which the valve 23 is opened successively, and then the valve 21, through which compressed air is again supplied to the pipe 11. Under the action of compressed air, the valve 3 opens again, the valve 4 closes and the pergone sample of the pipe 12 is displaced upward from the lower cavity of the chamber 1 and is discharged into the substituted container. At the same time, through the open valve 3, the second sample of the liquid enters the upper cavity of chamber 1 until the cavity is completely filled. In order to ensure the specified mode of operation of the device, the diameter of the inlet valve 3, the internal diameter of the pipe 12 and the pressure of compressed air must be chosen so that the upper cavity of chamber 1 has time to fill the sample until the previous sample is displaced to the top. After taking (draining) the first point sample, the valve 21 is closed, the valve 22 is opened, and after or in the process of draining the second sample of liquid into the lower cavity of the chamber 1 with the valve 23 open, it is immersed to the next level. Close the valve 22, open the valve 21 and drain the second sample of the liquid into a separate container. Similarly, all subsequent point samples are taken, except for the latter, which is drained after the chamber is removed from the liquid reservoir. In order to take the combined sample, chamber 1, as in the previous case, is successively submerged to the specified levels, but when the valve 23 is closed. Upon reaching each level, the valve 22 is closed, the valve 21 is opened and the pipe 11 is fed through the pipe 11 through the pipe 11. switching valves and a point sample of fluid from a given level enters the upper cavity of chamber 1. After filling the upper cavity of chamber 1 with a dot sample, valve 21 closes and opens valve 2 thereby reducing the pressure in the lower cavity of chamber 1 and in cylinder 6 to the core. atmospheric. As a result, the valves are switched and, through the open valve 4, the next point sample of the liquid flows into the lower cavity of chamber 1, which is already partially filled with the previous point samples that are part of this combined sample. The point samples upward are not displaced, but accumulate in the lower cavity of chamber 1, since the valve 23 is closed. After filling the lower cavity of chamber 1 with all point samples, which together form the combined sample, the chambers are removed from the reservoir, the valve 22 is closed, the taps 23 and 21 are opened and the combined sample is displaced upward through the pipe 12 to discharge the substituted container. When it is necessary to take a series of pooled samples, each of them is expelled from the lower cavity of chamber 1 and is not removed from the tank. Camera 1 is released or raised to the level at which the first point sample is to be taken, which is part of the next combined sample. Upon reaching this level, valve 22 is closed, valves 23 and 21 are opened, as a result of which the combined sample through pipe 12 is displaced to the top, and the specified point sample enters the upper cavity of the chamber at that time until it is completely filled. After draining the combined sample, the valve 22 is opened, thereby relieving the pressure inside chamber 1, and immersed it to the next level. The last point or the last combined sample can also be drained via the drain valve 5 after the chamber 1 is lifted to the top. Before and after use for sampling fluid from the reservoir tank, chamber 1 is removed. The flushing fluid is washed through the valve 5.

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Claims (2)

1. DEVICE FOR SELECTING LIQUID SAMPLES from reservoirs, mainly oil and oil products, containing a submersible chamber with an inlet valve to fill its sample, a compressed air supply and sample displacement system, pneumatic valves control valves and varying the sampling process, characterized in that, in order to expand the functionality and increase the productivity of the device, the camera is equipped with a horizontal partition with a bypass valve installed on it and installed in the upper parts of the chamber with an inlet valve, and the compressed air supply system and sample displacement upward are made in the form of two coaxial elastic crush-resistant pipes of a drain valve and a drum, while the outer pipe is connected to the compressed air supply system and pneumatic valve control and is rigidly attached to the chamber, the internal connection -. Yen with tap, § lower ends of both tubes are connected to the lower cavity and the upper chamber _g equipped coupling installed on the drum 2. The device according to π. 1, characterized in that, "the lower cavity of the chamber is made with a volume exceeding 5-7 times the volume of its upper cavity. SU -1177716,) 1’777