RU144385U1 - DEVICE FOR TAKING SAMPLES OF LIQUID PRODUCTS FROM RESERVOIR - Google Patents

Abstract

1. A device for sampling liquid products from a tank, containing sampling tubes installed inside the tank, a tank, a sample drain valve and a pump, characterized in that it is provided with a wall configured to form external and internal modules connected by flow channels, the internal module is made in the form of a set of sampling tubes, the lower ends of which are connected to the check valves and are hermetically fixed to the indicated wall on one side, and the external module is made in the form of external elements a device mounted on the plate sealingly mounted to the wall on the other side and adapted to the compounds of flow parts of elements of internal and external modules via inverse klapany.2. The device according to claim 1, characterized in that the external module includes a pipe for returning the product to the tank connected to the plate, a sample drain valve, a pump, as well as stopcock taps for sample intake levels and a mixer tank.

Description

The utility model relates to the production of equipment for enterprises of the oil, refining and petrochemical industries, namely, devices for sampling petroleum products and oil from tanks.

The prior art devices for sampling (stationary samplers) for taking a point (unmixed) representative sample of a product from a certain level of the container in which this product is located (see, for example, GOST 2517-85 Petroleum and petroleum products. Sampling methods. M .: IPK Standards Publishing House, 2003. S. 14, Fig. 1 and 2). Known stationary samplers are widely used to assess the water cut of a product in reservoirs of produced oil, various sedimentation tanks of stratified products, etc. Structurally, such devices are performed by introducing pipes into the reservoir, the open end of which ends at the level of a layer whose composition is interesting.

There is also known a device for sampling liquid products from a tank, containing sampling tubes installed inside the tank, a sample drain valve, a pump connected to the collector inlet, an outlet to the drain valve (see RF patent No. 566614 for utility model, IPC G01N 1/10 , published on September 10, 2006). The known device, however, does not allow to fulfill the requirements of regulatory documentation: clause 2.6.25 of PB 09-560-03 "Rules for industrial safety of oil depots and oil product warehouses" (from 26.12.2012 p. 10.24 "Safety Guide for oil depots and oil product warehouses" ): "The devices of level measuring and sampling systems should provide the ability to verify their operability without dismantling and releasing the tank from the product", paragraph 4.4. GOST 13196-93 Automation devices for tank farms, means for measuring the level and sampling of oil and oil products. General technical requirements and test methods: "The design of level measuring instruments and sampling should include the possibility of verifying their operability without dismantling and releasing the tank from the product," as well as clause 4.3 of GOST 13196-93: "Locking devices for sampling means must ensure duplication of each other friend. "

The closest in technical essence to the claimed utility model is the design of "Devices for sampling liquid products from the tank", containing sampling tubes installed inside the tank, tank, sample drain valve, pump (patent No. 2431126, IPC G01N 1/10, publ. 10.10.2011), which is aimed at ensuring compliance with the requirements of the above standards and the possibility of repair work on the sampling system without releasing the tank from the product. In this regard, the authors of RF patent No. 2431126 solve the problem of increasing the operational reliability of sampling systems and satisfying the requirements of regulatory documentation by using a control unit for duplicating cranes through an axis connected to the drive beam in the sampling device, and through taps for the duplicating cranes system - with driven rockers, which, in turn, are attached to redundant valves installed on the product sampling tubes.

The device according to patent No. 2431126, adopted as a prototype, providing the requirements of regulatory documentation, from our point of view, does not provide operational reliability and ease of repair. Firstly, the presence of a system of rods, cranes and a movable drive (axis) and their connections inside the tank, inaccessible to maintenance personnel, reduces reliability (for example, breakage due to inhomogeneous deformation of the walls and bottom of the tank at the attachment point of the crane duplication system and the axis exit point into the tank) and does not allow to verify the normal functioning of the device without emptying the tank. Secondly, the presence of many seals along the axis of control of the duplication system through pipes also reduces the reliability of the device due to the possibility of product leakage through these seals into the external environment. Thirdly, the maintainability of the external parts of the device is low, due to the fact that the design contains a large number of pipes passing through the wall of the tank and, accordingly, there are the same number of fasteners for fixing the pipes on the wall, which should be removed for dismantling. This means that it is not possible to remove external elements simultaneously and quickly on the tank.

The objective underlying this utility model is the creation of a device for sampling liquid products from a reservoir, which ensures reliability and maintainability of the structure.

The technical result that can be obtained by using the claimed utility model is to improve the repair and maintenance conditions of the external elements of the device for sampling liquid products from the tank by ensuring that they are carried out in repair shops without supplying pressure and electricity sources to the installation site of the device on the tank.

The problem underlying this utility model, with the achievement of the claimed technical result, is solved by the fact that the device for sampling liquid products from the tank, containing sampling tubes installed inside the tank, the tank, the sample drain valve and the pump, is equipped with a wall made with the possibility of the formation of external and internal modules interconnected by flow channels, while the internal module is made in the form of a set of sampling tubes, the lower ends of which are connected to check valves and seal chno fixed to said wall on the one hand, and the external module is configured in the form of external device elements fastened to the plate sealingly mounted to the wall on the other side and adapted to the compounds of flow parts of elements of internal and external modules via check valves.

In addition, the external module includes a pipe for returning the product to the tank connected to the plate, a sample drain valve, a pump, as well as stopcock taps for sample intake levels, a mixer tank.

Providing a device for sampling liquid products from the tank with a wall configured to form external and internal modules connected by flow channels, as well as making the flow part of the check valves of the internal module with the possibility of opening under the action of the plate of the external module allows cleaning the flow part of the elements of the external sampling device module, repair, coating restoration, pressure testing of the external module of the sampling device after repair and other operations in convenient conditions, without bringing sources of pressure and electricity to the installation site of the device on the tank.

The prior art does not reveal solutions that would have signs that match the distinguishing features of the inventive device for sampling liquid products from the tank, so the latter meets the condition of patentability "novelty", and the possibility of using equipment for the production of oil, oil refining and petrochemical industries allows to conclude that it meets the condition of "industrial applicability".

Preferred embodiments of the proposed technical solution are described below based on the drawings, where:

- in FIG. 1 shows a general view of a device for sampling liquid products from a tank;

- in FIG. 2 same side view;

- in FIG. 3 shows a section along Α-A in FIG. one;

- in FIG. 4 shows a section along BB in FIG. one;

- in FIG. 5 shows a second installation option of the proposed device;

- in FIG. 6 - the same side view;

- in FIG. 7 shows a third installation option of the proposed device;

- in FIG. 8 - same, top view.

In graphic materials, the corresponding structural elements of the device for sampling liquid products from the tank are indicated by the following positions:

1 - internal module;

2 - external module;

3 - sampling tubes;

4 - wall;

5 - check valve;

6 - shutoff valve check valve;

7 - emphasis;

8 - plate;

9 - taps overlapping sampling tubes;

10 - mixer tank;

11 - pump;

12 - sample drain valve;

13 - tube line return product to the tank;

14 - check valve seal;

15 - plate seal on the wall surface;

16 - screws securing the plate to the wall.

The device for sampling liquid products from the tank contains an internal 1 and external 2 modules.

The indoor unit 1 is permanently permanently installed in the tank. It is a set of sampling tubes 3, the free ends of which are fixed at the levels from which sampling is necessary. The other ends of the tubes 3 are hermetically attached to the wall 4. In the wall 4 of each tube 3 there is a permanently installed non-return valve 5, the shutoff member 6 of which is able to be squeezed out by the stop 7 belonging to the plate 8 of the external module 2, when it is installed on the wall 4. Next on the plate 8, all parts related to the external module 2 are installed and fixed, for example, valves 9 for blocking the pipes of the sampling levels, mixer tank 10, pump 11, valve 12 for draining the sample, tube 13 of the product return line to the tank, the latter based on presently This technical solution also communicates with the tank through plate 8, wall 4 and check valve 5. To ensure a tight stop-wall connection, there is a seal 14. To duplicate the seal 14, a seal 15 of plate 8 is provided. Plate 8 is fixed to the wall with 4 screws 16 .

A device for sampling liquid products from the tank works as follows.

The plate 8, with all the elements of the external module 2 installed on it, is pressed through the seal 15 to the wall 4. At the same time, the stops 7 move through the holes in the wall 4, as along the guides, abut against the shut-off element 6 of the check valve 5, displacing it from the “closed” position "in the valve body 5 to the" open "position. Plate 8 through the seal 15 is hermetically attached to the wall 4 by screws 16. The cross-sections of the valves 5 and the product from the reservoir are released through the sampling tubes 3, can flow freely into the plate 8 and sampling can be performed. Thus, when installing the external module 2 on the tank, it is simply brought to the tank wall, installed and fixed with screws 16. The device for sampling liquid products from the tank is ready for operation. Before sampling begins, one or more taps 9 for shutting off the sampling tubes are opened, the three-way valve 12 for draining the sample switches to the "open for pumping product into the tank" position. The three-way valve 12 for draining the sample can have two positions: “open for pumping the product into the tank” and “open for draining the sample”. In the first case, when the pump 11 is operated through a three-way valve 12, the product remaining during the previous sample is taken through the tube 13 of the product return line to the tank, the channel in the plate 8 and the check valve 5 enters the tank. When the pump 11 has been operating for some time, the product from taking the previous sample located in the flow channels of the device is replaced with an updated product coming from the tank levels corresponding to the open taps 9. The three-way valve 12 for draining the sample is put into the "open for draining sample" position. The updated product enters the mixer tank 10, and the pump 11 is pumped through the valve 12 to drain the sample into a special container.

If it is necessary to remove the external module 2, for example, to repair its parts, the screws 16 are unscrewed. The plate 8 with the stops 7 and the entire external module 2 is retracted from the wall 4 and removed. Thus, the locking elements 6 are released and the passage sections of all check valves 5 are closed, leaving the tank tight against the external environment. External module 2 is ready for transportation for repair. There is no need to empty the tank to repair the sampling device. The absence of moving parts inside the tank requiring inspection and repair, as well as the use of sequentially located seals 14 and 15 can increase the reliability of the sampling device compared to the prototype. This design of the device is indispensable in the case of the use of sampling devices on tanks with viscous oil products, for example, bitumen, for timely cleaning of the internal cavities of the pipes of the external module 2, which are compared with the internal pipes at lower temperatures from clogging when the product solidifies, as well as on the tanks for any other products for cleaning pipes from crystallized water at low temperatures. In addition, overall dimensions and metal consumption are reduced, and the complexity of manufacturing and repairing the design of the sampling device is reduced.

The proposed technical solution is universal and can be used in the construction of any type of device for sampling both multi-column and single-column, both with forced discharge of the product, and gravity drain.

Claims (2)

1. A device for sampling liquid products from a tank, containing sampling tubes installed inside the tank, a tank, a sample drain valve and a pump, characterized in that it is provided with a wall configured to form external and internal modules connected by flow channels, the internal module is made in the form of a set of sampling tubes, the lower ends of which are connected to the check valves and are hermetically fixed to the indicated wall on one side, and the external module is made in the form of external elements a device mounted on the plate sealingly mounted to the wall on the other side and adapted to the compounds of flow parts of elements of internal and external modules via check valves. 2. The device according to claim 1, characterized in that the external module includes a pipe connecting the product return pipe to the tank, a sample drain valve, a pump, as well as stopcock valves for sample intake levels, a mixer tank.