RU167971U1 - Sectional sampler for oil products - Google Patents

Abstract

The utility model is aimed at obtaining the actual composition of the sample at each measured level without loss of oil products. The specified technical result is achieved by the fact that the sampler contains a support rod mounted inside the tank with hinge assemblies, the lower of which is attached to the tank wall, and the upper one to the float, and the sampling pipes rigidly interconnected with sampling units. Outside the tank, on the wall there is a switchgear hydraulically connected to a pumping pipe installed inside the tank, sampling taps from the lower, middle and upper levels, a drain and pumping valve, a pumping crane, a drain valve, and a hand pump. 1 s.p. f-ly, 2 ill.

Description

The utility model relates to the production of technological equipment for oil and gas production, oil and gas refining, storage of oil and oil products, in particular to devices for sampling oil products and oil from tanks.

The prior art low-level three-level tank sampler PRST TU 3689-099-10524112-2007 is known (see, for example, Reduced Samplers LLC TD "Reservoir Equipment", http://www.azsneftebaza.rf/rezervuarnoe-oborudovanie/probootborniki/). The known sampler consists of one or two knee sections rigidly connected to each other by flexible tubes and hinge assemblies, the lower hinge assembly being fixed to the tank wall and the upper one to a special float. The sampler is designed to take point samples from three levels of the reservoir liquid according to GOST 2517-85, sampling is made from taps corresponding to the level from which it is necessary to take a sample.

The disadvantages of the design of a stationary sampler for sampling point samples from three levels are:

- flexible hoses in conditions of aggressive oil products lose their rigidity, flatten and do not pass the sampled oil during sampling, which leads to frequent replacement of tubes;

- lack of a pump in the sampling system, and as a result, sampling is carried out only by gravity;

- the inability to not drain the stagnant product into a separate container, but to pump it through a pump with a return to the tank through the pumping pipe;

- surplus product cannot be returned back to the tank;

- difficult sampling at low temperatures and high kinematic viscosity of the product.

The closest in technical essence to the claimed technical solution is a device for sampling (stationary samplers) for taking a point (unmixed) representative sample of a product from a certain level of capacity in which this product is located (see, for example, GOST 2517-85 Oil and oil products Sampling methods. M: IPK Standards Publishing House, 2003. P. 14, dash. A well-known stationary sampler for sampling point samples from three levels is used to assess the water content of the product in the reservoirs of oil produced, p different sedimentation tanks of exfoliating products, etc. Structurally, the specified sampler contains a support arm mounted inside the tank with sampling pipes rigidly interconnected, the open end of which ends at the level of the layer whose composition must be installed, by hinged assemblies, the lower of which is fixed to the tank wall, and the top is attached to the float.When taking a combined sample of oil and oil products in one step according to GOST 2517-85, the level at a distance is taken as the lower sampling point 250 mm from the bottom of the tank, take the level 250 mm below the surface of the oil or oil product as the top sampling point.

Between the upper and lower levels, point samples of the oil product are taken at a distance of half the height of the column of oil product.

The disadvantages of the known sampler for sampling point samples from three levels are:

- sampling is carried out only by gravity;

- when sampling, a stagnant product in the piping system must be drained into an additional container;

- surplus product cannot be returned back to the tank;

- difficult sampling at low temperatures and high kinematic viscosity of the product.

The technical task of this utility model is: to create a sampler for differentiated sampling of oil or oil products from three levels of the tank in accordance with GOST 2517-2012, which allows to determine the chemical composition of the oil separately at each level by the height of the tank with the possibility of draining the required fraction.

The technical result achieved by the implementation of the proposed design of the sampler is to obtain the actual composition of the sample at each measured level without loss of oil products.

The task underlying this utility model, with the achievement of the claimed technical result, is solved by the fact that the sampler is a sectional sample for petroleum products, containing a support rod mounted inside the tank with hinge assemblies, the lower of which is attached to the tank wall, and the top to the float, and rigidly interconnected sampling pipes, the open end of which ends at the level of the layer whose composition needs to be installed, is equipped with a switchgear hydraulically connected to tanovlenii pumping pipe inside the tank, valves Sampling from the lower, middle and upper levels, and drain cock pumping, pumping valve, drain valve, and a manual pump.

In addition, the lower hinge assembly is hydraulically connected to the switchgear and is configured to alternately transfer the selected product of the middle and upper levels from the sampling pipes.

The use of a switchgear in the design of the sampler that is hydraulically connected to the sampling taps from the lower, middle and upper levels, the drain and pump valves, the bleeder valve and the drain valve, and the hand pump allows you to clean the sampling tubes before taking the sample, thereby ensuring the actual composition of the sample at each measured level without loss of oil products.

From the prior art, no solutions have been identified that would have signs that match the distinguishing features of the proposed sectional sampler for petroleum products, so the latter meets the condition of patentability "novelty", and the possibility of using equipment for oil and gas production, oil and gas processing, storage of oil and oil products allows us to conclude on its compliance with the condition "industrial applicability".

The preferred embodiment of the proposed technical solution is described further on the basis of the drawings, where:

- in FIG. 1 schematically shows the claimed sectional sampler for petroleum products;

- in FIG. 2 shows a switchgear, fragment, side view.

In graphic materials, the corresponding structural elements of a sectional sampler for petroleum products are indicated by the following positions:

1. barbell;

2. the upper node of the sampling;

3. the middle node of the sampling;

4. lower sampling unit;

5. pipe for pumping stagnant product;

6. lower hinge assembly;

7. upper hinge assembly;

8. float;

9. switchgear;

10. hand pump;

11. sampling tap from the lower level;

12. sample tap from an average level;

13. sampling tap from the upper level;

14. tap drain and pump;

15. pumping valve;

16. The drain valve.

Sectional sampler for petroleum products contains a support rod 1 installed inside the tank with hinge assemblies, the lower 6 of which is attached to the tank wall, and the upper 7 to the float 8, and sampling pipes rigidly interconnected, upper assembly 2, middle assembly 3 and lower assembly 4 sampling, the open ends of which are made in the form of cylindrical tips with through axial symmetrical slots on the side surface, and on the end surface of the tip concentrically to the axial hole made p adial symmetrical slots (not shown in the drawings). On the rod 1 there are two metal pipelines for sampling the middle and upper levels, and the tip (not shown) of the upper node 2 of the sampling is fixed below the liquid level by 250 mm; the tip of the middle node 3 of the sampling - at a distance of half the height of the column of oil. The lower node 4 of the sampling is installed stationary at a height of 250 mm from the bottom of the tank and at a distance of 2000 mm from the wall of the tank. Outside the tank, on the wall there is a switchgear 9, hydraulically connected to the pumping nozzle 5 installed inside the tank, sampling valves 11, 12, 13 from the lower, middle and upper levels, a drain and pumping cock 14, a pumping cock 15, a drain cock 16, and by hand pump 10.

Sectional sampler for petroleum products works as follows.

The design of the distribution device 9 of the sampler has four operating modes:

1) sampling from each tank level by gravity with preliminary emptying of the system pipelines into a separate container;

2) injection into the tank of the product drained from the pipelines;

3) pumping pipelines through pump 10 back to the tank;

4) forced sampling through pump 10 from each tank level.

To take a sample using a sampler, it is necessary to open a crane corresponding to the level, pour at least 2 volumes of the product in the system into a separate container, or pump the system according to the operating modes of the switchgear 9 and fill in the necessary amount of oil product in a special container. In the case of prolonged shutdown of the sampler, sedimentation of the product in the piping system, weak or no flow of liquid at all, it is necessary to clean it by opening and closing the corresponding taps, to pump the liquid with the manual pump 10 into the same tank through the pump pipe.

Hand pump 10 is also used for forced pumping of oil at low temperatures and high kinematic viscosity of the product.

If the product is drained into a separate container, the sampler is equipped with a system for returning the drained oil product back to the tank using a hand pump.

The distribution device 9 operates as follows:

1) For pumping pipelines from the upper level before sampling, open the ball valves 13, 15 and shut off the valves 11, 12, 14, 16.

2) For pumping pipelines from an average level before sampling, it is necessary to open ball valves 12, 15 and turn off valves 11, 13, 14, 16.

3) For pumping pipelines from the lower level before sampling, open ball valves 11, 15 and shut off valves 12, 13, 14, 16.

4) For sampling by gravity from the upper level or draining into containers before sampling, it is necessary to open ball valves 13, 14 and turn off valves 11, 12, 15, 16.

5) For sampling by gravity from an average level or draining into containers before sampling, open ball valves 12, 14 and shut off valves 11, 13, 15, 16.

6) For sampling by gravity from the lower level or draining into containers before sampling, it is necessary to open ball valves 11, 14 and turn off valves 12, 13, 15, 16.

7) For sampling, forcibly through the pump from the upper level, it is necessary to open the ball valves 13, 16 and block the valves 11, 12, 14, 15.

8) For sampling, forcibly through the pump from an average level, it is necessary to open the ball valves 12, 16 and block the valves 11, 13, 14, 15.

9) For sampling, forcibly through the pump from the lower level, it is necessary to open the ball valves 11, 16 and block the valves 12, 13, 14, 15.

10) To pump excess product back into the tank, the ball valves 14, 15 must be opened and the valves 11, 12, 13, 16 shut off.

Thus, when using the proposed sampler sectional for petroleum products, the sampling process is greatly simplified, does not require special skills and additional instruments. In addition, the simplicity of the design of a sectional sampler for petroleum products ensures reliable operation for a long time, and the use of a hand pump in the design of the drain device allows you to free sampling tubes from stagnant oil before sampling, thereby ensuring the actual composition of the sample at each measured level without loss petroleum products.

Claims (2)

1. Sectional sampler for petroleum products, containing a support rod mounted inside the tank with hinge assemblies, the lower of which is attached to the tank wall, and the upper one to the float, and sampling pipes rigidly interconnected, the open end of which ends at the level of the layer, the composition of which is necessary install, characterized in that it is equipped with a switchgear hydraulically connected to the pumping pipe installed inside the tank, sampling valves from the lower, middle and upper of levels, drain valve and pump, pumping valve, drain valve and a hand pump. 2. The sampler according to claim 1, characterized in that the lower hinge assembly is hydraulically connected to the switchgear and configured to alternately transfer the sample product of the middle and upper levels from the sampling pipes.

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