RU2696448C1 - Stationary sampling system with measurement hatch - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to devices for sampling oil and oil products from a reservoir. Stationary sampling system with measuring hatch comprises cylindrical housing 1 with mounting flange 2, inside which there is sampler 3 fixed on perforated tape 4 by means of suspension 10. Power rack 5 with retainer 11 in upper part is installed along housing 1 freely in bracket 12 fixed on housing. System also comprises winding device 6 of perforated tape 4, direct drain device 7 with drain tube 13, inspection windows 8, submersion depth counter 9. Winding device 6 is connected to housing cover and power rack 5, and power post 5 is made in form of pipe on rod, rigidly fixed to lower part of housing 1. Drain tube 13 is made of three parts: receiving tube 14, bypass chamber 15 and drain tube 16. Bypass chamber 15 of cylindrical shape is hingedly fixed in direct drain device 7. Receiving tube 14 is made of tube bent in one plane and rigidly fixed by one end with cylindrical part of bypass chamber 15. Drain tube 16 is made of a pipe bent in two perpendicular planes and rigidly connected by its one end to end face of bypass chamber 15. In the connection zone on draining tube 16 there is a rectilinear section located in the zone of the radial movable seal 18 installed in the housing of the direct drain device 7. Inner cavity of overflow chamber 15 is made in the form of two perpendicular cylindrical channels connected to each other and inner cavities of intake pipe 14 and drain tube 16.

EFFECT: use of the proposed design ensures complete tightness when sampling oil and oil products on oil tankers and reservoirs.

3 cl, 2 dwg

Description

The invention relates to a device for sampling oil and oil products from a tank to determine their parameters, for example, can be used for semi-automatic sampling at any desired depth of the tank, except for the bottom.

A device for sampling liquid from a reservoir is known, a kit MK 10 ATEX, CXEX from UK Samplig Gauges Ltd, comprising a cylindrical housing mounted on a flange, inside which a sampler is mounted, mounted on a perforated tape by means of a suspension, a power rack with a latch in the upper part, mounted along housing freely in the bracket mounted on the housing, a device for winding a perforated tape, a direct drain device with a drain tube and a curtain, viewing windows, depth gauge. The winding device is connected to the housing cover and power rack. The power stand is made in the form of a pipe on a rod rigidly fixed to the bottom of the case (see UK Samplig Gauges Ltd device. Kit MK 10 ATEX, IECEx. Operation manual. Ver.2. March 2016).

The disadvantage is that the direct drain device is leaky, which does not meet the environmental and fire safety requirements when working with oil and oil products, and cannot be used to install a measuring tape.

The closest in technical essence to the present invention is a device for closed sampling of oil and oil products from a tank, containing a cylindrical body with an installation flange, inside which there is a sampler mounted on a perforated tape by means of a suspension, a power rack with a latch in the upper part mounted along the body freely in the bracket mounted on the housing, a device for winding a perforated tape, a direct drain device with a drain tube and a curtain, moreover the direct-drain device drain pipe is mounted on the flange in the movable curtain through the cuff and loosely installed in a clamp fixed to the housing flange, and the housing is connected to the movable curtain of the direct-drain device with a sealing ring, inspection windows, a dip counter, and the winding device is connected to the housing cover and the power rack, and the power rack is made in the form of a pipe on a rod rigidly fixed to the bottom of the case (see RF patent for PM No. 178121 by class. MKI G01N / 10, 2018).

The disadvantage is that the direct drain device containing a drain pipe mounted on the flange in the movable curtain through the cuff cannot provide complete tightness when taking the sample, because the tube cross section at the point of contact with the cuff, due to the misalignment of the tube axes in this section and the cuff axis, is an oval, which does not provide full cuff coverage of the entire tube surface in cross section, and this device also does not have devices for installing and directing the measuring tape strictly vertically roulettes.

The purpose of the invention is the creation of complete tightness during sampling.

This goal is achieved by the fact that a stationary sampling system with a measuring hatch, containing a cylindrical body with a mounting flange, inside which a sampler is mounted, mounted on a perforated tape by means of a suspension, a power rack with a latch in the upper part, mounted freely along the body in a bracket mounted on the body , a device for winding a perforated tape, a direct drain device with a drain pipe, viewing windows, a counter for immersion depth, the winding device being connected to yshkoy housing and a power reception, and the power rack is formed as a tube on a rod rigidly secured to the bottom of the housing. The drain pipe is made of three parts: a receiving pipe, a bypass chamber and a drain pipe. The cylindrical bypass chamber is pivotally mounted in the direct discharge device. The receiving tube is made of a pipe bent in one plane and rigidly fixed at one end with the cylindrical part of the bypass chamber. The drain pipe is made of a pipe bent in two perpendicular planes and is rigidly connected at one end to the end of the bypass chamber. A straight section is provided in the connection zone on the drain pipe located in the zone of the radial movable seal installed in the body of the direct drain device. Moreover, the internal cavity of the bypass chamber is made in the form of two perpendicularly arranged cylindrical channels interconnected with the internal cavities of the receiving tube and the drain pipe.

In addition, the drain pipe and the receiving pipe can be made of the same diameter.

A radial movable seal can be made in the form of an o-ring.

The technical result consists in the fact that the guaranteed tightness of the internal volume of the tank is ensured, the elimination of the oil and gas fractions in the atmosphere when taking a sample is achieved, and also that when the drain pipe is pressed when taking a sample from the sampler, the movement of the third part of the tube in the sealant is only rotational , without bending the edges of the seal.

In FIG. 1 shows the proposed device, in FIG. 2 - direct discharge device.

The stationary sampling system with a measuring hatch comprises a cylindrical body 1, with an installation flange 2, a sampler 3, a perforated tape 4, a power stand 5, a winding device 6 of a perforated tape 4, a direct drain device 7, viewing windows 8, an immersion depth counter 9. Inside case 1 is located a sampler 3, mounted on a perforated orientated tape 4 by means of a suspension 10. Sampler 3 is a stainless vessel into which a sample is taken. A power rack 5 with a latch 11 in the upper part is mounted freely along the housing in the bracket 12 mounted on the housing 1. The direct discharge device 7 is designed to drain the sample from the sampler 3 into any receiving container and is made with a drain pipe 13. The drain pipe 13 is made of three parts: the receiving tube 14, the bypass chamber 15 and the drain pipe 16. The bypass chamber 15 of a cylindrical shape is pivotally mounted in the direct drain device 7. The receiving tube 14 is made of a pipe bent in one plane and rigidly fixed to one end with the cylindrical part of the bypass chamber 15. The discharge pipe 16 is made of a pipe bent in two perpendicular planes and is rigidly connected at one end to the end of the bypass chamber 15. A straight section 17 is provided in the connection zone on the discharge pipe 16 located in the radial movable seal area 18 installed in the housing of the direct discharge device 7. The internal cavity of the bypass chamber 15 is made in the form of two perpendicularly arranged cylindrical channels 19 connected to each other and internal the receiving tube 14 and the drain pipe 16. The drain pipe 16 and the receiving pipe 14 are made of the same diameter. The radial movable seal 18 is made in the form of a sealing ring. The drain valve 20 of the sampler is located in the lower part of the sampler 3. The latch 21 serves to fix the sampler 3 during the discharge of the sample.

The measuring hatch is included in the TU 3689-010 = 03467856-2001 and is installed on the upper part of the cylindrical body 1.

The system operates as follows.

Before carrying out the sampling procedure, it is necessary to measure the height of the liquid filling the tank. To accurately determine the height (depth) of sampling, it is necessary to carry out operations of measurement and sampling from one point. Currently, the procedure is as follows: a measuring hatch is installed on the tank, a liquid level is measured, then the measuring hatch is dismantled, and a sampling kit is installed in this place of the tank.

To introduce the measuring hatch into the stationary sampling system, the top flange of the kit has been finalized. On a permanently installed set, the power rack 5 rises to the maximum height, the winding device casing 6 is turned away from the case 1, and the measuring hatch included in the set is installed, after measurement, the measuring hatch is removed, the winding device 6 is rotated and the power rack 5 is lowered , the kit is ready for sampling. Therefore, assembly and disassembly of the kit are not performed, only the mounting and dismounting of the measuring hatch is performed.

Next, the sampler 3 is mounted on the suspension 10 of the perforated tape 4. To do this, raise the power rack 5 to the maximum height, unscrew the winding device body 6 from the body 1 to prevent the sampler from falling 3. Return the winding device body 6 to its original position and lower the power rack 5 with the sampler 3 into a cylindrical body. When installing the sampler 3, it is necessary to monitor the perforated tape 4, do not twist it and do not bend it. Check: if the latch 21 on the housing is depressed 1. Check the zero setting on the immersion depth counter 9. Release the latch on the winder 6 and carefully lower the sampler 3 to the desired depth, focusing on the counter. The unwinding of the perforated tape 4 is uniform, without jerking, at a constant speed. When approaching a given point, it is necessary to reduce the speed of unwinding the tape.

The viewing windows 8 are designed to visually monitor the processes of sample discharge, installed at the level of the direct drain device 7. The drain pipe 13 has one degree of freedom: vertical around the axis of the bypass chamber, so by turning the drain pipe 13 it is precisely brought to the drain valve of the sampler window. The tightness of the joints is ensured in the direct drain device of the cylindrical body. After pressing the valve, the sample is drained through a drain pipe into a receiving tank.

Redirecting the flow of the liquid sample allows for up and down swing movements, while the receiving tube 14 directly presses and opens the drain valve 20 of the sampler 3, by applying force to the drain pipe 16, and the unit is sealed by a seal installed in the body of the direct device drain 7, through which a rectilinear section 17 of the drain pipe 16 exits coaxially with the axis of the seal 18, performing rotational movements and a section of the drain pipe at the point of contact with the seal 18 16 fully corresponds to the circumference, which ensures complete tightness.

The proposed stationary sampling system with a measuring hatch is designed and tested. TU 26.51.12-006-42929218-2019 are developed, meets the requirements of TP TS 010/2011, in terms of explosion-proof equipment TP TS 012/2011. The device can be manufactured in the climatic version U, UHL and HL according to GOST 15150, location category - 1, in the range of ambient temperatures -60 ° C ÷ 80 ° C; in the process of exposure to mechanical factors corresponding to the group of operating conditions Ml according to GOST 17516, including vibration loads with a frequency of 1-35 Hz and an acceleration of 0.5G; in terms of seismic effects for areas with seismicity up to 7 points inclusive on the MSK-64 scale. The device is recommended for spot sampling of oil and oil products on oil tankers and tanks according to GOST 2517-2012.

Using the proposed technical solution allows to achieve complete tightness when taking samples of oil and oil products on oil tankers and tanks.

Claims (3)

1. A stationary sampling system with a measuring hatch, comprising a cylindrical body with a mounting flange, inside of which there is a sampler mounted on a perforated tape by means of a suspension, a power rack with a latch in the upper part, mounted freely along the body in an arm mounted on the body, a winding device perforated tape, direct drainage device with drain pipe, viewing windows, immersion depth counter, the winding device being connected to the housing cover and power rack d, and the power stand is made in the form of a pipe on a rod rigidly fixed to the lower part of the housing, characterized in that the drain pipe is made of three parts: a receiving pipe, a bypass chamber and a drain pipe, a cylindrical bypass chamber is pivotally mounted in the direct drain device, the receiving tube is made of a pipe bent in one plane and is rigidly fixed at one end to the cylindrical part of the bypass chamber, and the drain pipe is made of a pipe bent in two perpendicular planes and is rigidly connected at one end with the end of the bypass chamber, and in the connection zone on the drain pipe, a straight section is provided located in the zone of the radial movable seal installed in the housing of the direct drain, and the internal cavity of the bypass chamber is made in the form of two perpendicularly arranged cylindrical channels interconnected and internal cavities of the receiving tube and the drain pipe. 2. A stationary sampling system with a measuring hatch according to claim 1, characterized in that the discharge pipe and the receiving pipe are made of the same diameter. 3. A stationary sampling system with a measuring hatch according to claim 1, characterized in that the radial movable seal is made in the form of an o-ring.

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