RU2470283C2 - Device for sampling from discharge pipeline (versions) - Google Patents

Abstract

FIELD: measurement equipment.

SUBSTANCE: invention relates to versions of device arrangement for sampling of liquid media transported along a discharge pipeline. The device comprises a body, and also a piston installed in the body as capable of displacement, which separates the inner cavity of the body into two chambers. The piston is adapted for sampling the specified quantity of single samples in a sampler. The device comprises pipelines and stop elements to form a system of hydraulic lines that connect the body with a discharge pipeline and a sampler. At the same time the system of hydraulic lines has a section arranged in the form of a bypass line adapted for continuous passage of a liquid medium flow from a discharge pipeline during sampling of the specified quantity of single samples. Besides, the first chamber by means of the first hydraulic line with a valve installed on it is connected to the bypass line, and the second chamber by means of the second hydraulic line is connected to the sampler's input. Also the second chamber by means of the third hydraulic line is connected to a bypass line. The device may additionally contain at least one cabinet, through the wall of which at least one of pipelines is pulled, and such pipelines are designed to form a system of hydraulic lines.

EFFECT: provision of high extent of integrity of a sample composition with simultaneous simplification of a device and increased convenience of operation.

25 cl, 3 dwg

Description

The invention relates to a device for sampling fluids transported through a pressure pipe, and can find application in enterprises of oil production, oil refining, chemical, food, energy and many other fields of activity.

Known from patent RU No. 2305770 (publ. September 10, 2007), a storage sampler containing a pipeline, a housing in the form of a pipe with a hollow stem and valve. The hollow rod is rigidly and hermetically connected to the pipeline and is made in the form of a pipe with a beveled end and radial holes placed against the fluid flow from the opposite cut of the beveled end of the side of the rod. The second end of the pipe is hermetically connected to the pipeline for its narrowing in the zone of low pressure. The pipe between the valve and the second end is equipped with a cylindrical casing with a piston, made with the possibility of axial movement relative to the casing, from the side of the valve provided with a drain pipe. The piston is equipped with a valve that allows fluid to pass through the valve, made in the form of a cylinder with an electromagnet and a rod, inserted tightly into the cylinder with the possibility of axial movement using an electromagnet. The stem is equipped with two annular grooves. The first groove is made with the possibility of communication of the pipe with the cylinder and tight shutoff of the pipe when moving the rod in the cylinder, and the second with the possibility of communication of the drain and exhaust pipes when moving the rod in the cylinder.

Known from patent RU No. 2213948 (publ. 10.06.2010) a method of sampling liquid from a pipeline and a device for its implementation. In the method, the pumping of the fluid duct is carried out under the influence of excess pressure through the pipeline and point samples are taken by an automatic sampler. Between the time periods during which the automatic sampler performs the selection of spot samples, mixing along the pipeline fluid flow to align and distribute the ingredients in the stream. The device has a channel connecting the pipeline to the automatic sampler. A mixer is installed on the pipeline in front of the channel to mix the liquid stream along the pipeline to equalize and distribute the ingredients in the stream between time periods during which point sampling is performed by the automatic sampler.

A disadvantage of the known methods and devices is not high enough representativeness and reliability of sampling.

Known float devices for measuring the density of a liquid (Kivilis S.S. Density meters. - M .: Energy, 1980, pp. 25-34). To measure density using a hydrometer, the relationship between the density of the fluid being monitored and the depth of immersion at which the hydrometer comes into equilibrium is used. The disadvantage of the hydrometer is the occurrence of large errors due to the evaporation of light fractions from oil.

A well-known pressure pyknometer of the English company Stanhope Set Limited (Belyakov V.L. Automatic control of the parameters of oil emulsions. - M .: Nedra, 1992, pp. 187-189), which is a calibrated metal vessel made in the form of a cylinder with by cranes. An oil sample is taken from the pipeline into this vessel, and then the vessel is weighed on a precision balance. By dividing the mass of oil by volume, the density of oil is obtained. The pressure pycnometer is very difficult to manufacture and expensive.

It is known from patent RU No. 2391645 (publ. 10.12.2008) selected for the prototype device for sampling from a pipeline, which includes a housing; a piston mounted in the housing with the ability to move, dividing the internal cavity of the housing into two chambers, the first of which is hydraulically connected to the circuit of the first fluid, and the second is hydraulically connected to the circuit of the second fluid; a sampler located in the second fluid circuit, adapted to take a given number of samples from a second chamber in a given time; wherein the first chamber is connected to the circuit of the first fluid via an inlet line having a section arranged on the side of the circuit of the first fluid in the form of a bypass line that is adapted for continuous passage of a part of the flow path of the first fluid during sampling of a given number of samples. A shut-off element and a valve are installed on the inlet line to allow a single sample of the first fluid to pass from the bypass line to the first chamber during a single sample of the second fluid. In an embodiment, the device body is configured to disconnect from the second fluid circuit. A disadvantage of the known device is the use of two fluids, which both complicates the device itself and creates a number of inconveniences during its operation.

The basis of the invention is the task of creating a device for sampling from a pressure pipe, providing a high degree of preservation of the composition of the sample while simplifying the device and increasing ease of use.

The problem is solved in that a device for sampling from a pressure pipe containing a housing; a piston mounted in the housing with the ability to move, dividing the internal cavity of the housing into two chambers; a sampler adapted to take a predetermined number of single samples; pipelines and shut-off elements for forming a system of hydraulic lines connecting said body with a pressure pipe and a sampler; however, the hydraulic line system has a section made in the form of a bypass line adapted for the continuous passage of a fluid stream from a pressure pipe during the collection of a given number of single samples; moreover, the first chamber by means of a first hydraulic line with a valve mounted on it is connected to the bypass line, and the second chamber by means of a second hydraulic line is connected to the inlet of the sampler, characterized by the following main and secondary distinguishing features.

It is advisable that the second chamber through the third hydraulic line was connected to the bypass line.

Preferably, the device is configured to remove air from the first and / or second and / or third hydraulic lines, as well as to remove air from the first and / or second chamber chambers before taking a predetermined number of single samples.

The device may further comprise at least one filtering means.

It is advisable that the sampler is automatic.

Preferably, the device includes a means of measuring pressure.

The device can be configured to disconnect the housing from the hydraulic line system.

It is desirable that the housing is cylindrical.

Preferably, the total volume of the first chamber and the second chamber substantially corresponds to the volume of a predetermined number of single samples.

It is possible that the device further comprises at least one auxiliary capacity.

The problem is also solved by the fact that the above-described device in a variant embodiment further comprises at least one cabinet, through the wall of which at least one of the pipelines designed to form a system of hydraulic lines is passed.

A pipeline for a second hydraulic line can be passed through the cabinet wall, while the sampler is placed in the cabinet, and if there is an auxiliary tank in the device, it can be hydraulically connected to the sampler and placed in the cabinet.

Alternatively, pipelines for the first and third hydraulic lines may be passed through the cabinet wall, with the valve installed on the first hydraulic line being placed in the cabinet. In this embodiment, if the device is provided with auxiliary capacity, it can be placed in the cabinet and hydraulically connected to the sampler by means of an auxiliary pipeline, which is passed through the cabinet wall. The housing in this design can be mounted on the wall of the cabinet with the possibility of its removal.

In yet another alternative embodiment, the device may contain two cabinets, through the wall of the first of which a pipe for the second hydraulic line is passed, and through the wall of the second cabinet, pipelines for the first and third hydraulic lines are passed, while the sampler is located in the first cabinet and installed on the first hydraulic valve line is located in the second cabinet. In this embodiment, the device may comprise a first auxiliary container located in the first cabinet hydraulically connected to the sampler and a second auxiliary container located in the second cabinet, the second auxiliary container being hydraulically connected to the sampler through an auxiliary pipeline, which is passed through the walls of the first and second cabinets. In this case, the first and second cabinet can be made in one piece.

It is advisable that the height of each cabinet be essentially 590 mm with a width equal to essentially 360 mm and a depth equal to essentially 140 mm.

It is possible that each of the cabinets was made of metal.

The embodiments of the device described below should be read in conjunction with the accompanying drawings, in which:

Figure 1 - is a diagram of a device in one embodiment;

Figure 2 - is a diagram of a device in another embodiment;

Figure 3 - is a General view of the device in the performance with cabinets.

The device shown in FIG. 1 contains a vertically mounted sealed cylindrical body 1, a sampler 2 and a system of hydraulic lines formed by pipelines.

Sampler 2 is adapted to take a given number of single (point) samples.

A movable piston 3 is placed in the cylindrical housing 1, dividing the internal cavity of the housing 1 into two chambers isolated from each other - the first chamber 4 and the second chamber 5. The total volume of the first chamber 4 and the second chamber 5 is selected depending on the required maximum volume of the combined sample, consisting from a predetermined number of single samples, and is selected from a range from 0.5 cm ³ to 70,000 cm ³ , preferably from a range from 1000 cm ³ to 5000 cm ³ .

In a specific embodiment, the height of the cylindrical body 1 within the manufacturing manufacturing tolerances is approximately 1000 mm. In alternative embodiments, the housing 1 may have a shape different from cylindrical. The end walls of the housing 1, indicated by the positions, respectively, the first - 1 ₁ and the second - 1 ₂ , can be made in the form of removable covers (one or both).

The first chamber 4 through an opening in the first end wall of the housing 1 ₁ no included in the hydraulic line system of the first hydraulic line 6 with a shut-off element 7 installed on it and a valve 8 is hydraulically connected (fluidly connected) to the bypass line 9 entering the hydraulic line system ( where the direction of the flows is shown by arrows), which in turn is hydraulically connected to a pressure pipe transporting a fluid, for example, an oil pipe (not shown) through which a controlled fluid flows Wednesday. The bypass line 9 creates a constant fluid flow path to achieve the identity of a single fluid sample to the composition of the fluid that is currently flowing in the pipeline transporting the fluid. The flow direction in the bypass line 9 may be opposite to the direction shown by arrows in the drawings.

The valve 8 provides a flow of fluid through it at the time of sampling a single sample and stopping the passage of fluid through it in a pause between sampling of a single sample. The valve 8 may be made in the form of a ball placed with the possibility of its movement relative to the valve seat. As valve 8, any suitable valve can also be used, which ensures flow in only one direction - into the housing 1 at the time of sampling by a sampler 2.

The locking element 7, located on the first hydraulic line 6 between the valve 8 and the inlet of the first chamber 4, is installed so as to provide convenience when connecting the housing 1 assembly with the locking element 7 to the device, and also to block the first hydraulic line 6 as close to case 1 for the purpose of convenience for transporting the combined sample to the place of analysis and hereinafter - for the convenience of removing air from the device in preparation for a new sampling.

The first chamber 4 through a tee 10 is connected to the drain line 11, on which the locking element 12 is placed.

The second chamber 5 of the housing 1 through an opening in the second end wall 1 _{2 of the} housing 1 along the second hydraulic line 13 with a locking element 14 mounted on it through a tee 15 is hydraulically connected to the inlet 2 _{1 of the} sampler 2.

The second chamber 5 through the third hydraulic line 16 through the locking element 14 and the tee 15 is connected with the bypass line 9. On the third hydraulic line 16 from the side of the housing 1 after the locking element 14 and the tee 15 is installed locking element 17, and on the side of the bypass line 9 is installed locking element 18.

It is advisable to select the locking elements 7 and 17 so that their opening and closing are smooth (gradual) to prevent water hammer in the device, for example, needle-shaped. In addition, when participating in a process, it is advisable to open them last and close them first.

On the third hydraulic line 16, between the shut-off elements 17 and 18, a filter 19 and a pressure measuring means are arranged in the form of a pressure gauge 20. Alternatively, the filter 19 located on the third hydraulic line 16 can be placed between the shut-off element 18 and the bypass line 9 or between the shut-off line element 18 and pressure gauge 20 (not shown). In another alternative embodiment, the device can be made without a filter 19. The pressure measuring means can be made in the form of a pressure sensor. In the case of installing the filter 19, it is selected taking into account the operating pressure. As a filter, for example, a mesh filter can be selected with a mesh size corresponding to a pressure, for example, at an operating pressure of up to 4.0 MPa with a mesh size of 2.0 mm.

Additionally, the device may be equipped with a filter installed at the inlet of the bypass line having a cell size equal to or smaller than the smallest diameter in the hydraulic lines and mechanisms of the device (not shown).

On the pipeline for the first hydraulic line 6 in the direction of the fluid flow in front of the shut-off element 7, a first detachable connection 21 can be made to disconnect the first chamber 4 from the hydraulic line system (directly from the first hydraulic line 6), which allows the device to be made without a drain line 11, and discharge the combined sample through the first detachable connection 21. In this case, on the pipeline of the second hydraulic line 13 between the locking element 14 and the tee 15, a second detachable connection 22 can be made. The detachable connections 21 and 22 allow the housing 1 to be disconnected from the hydraulic line system, i.e. make housing 1 removable. The detachable connections 21 and 22 can be made quick disconnect. It is desirable that the pipeline for the first hydraulic line 6 and part of the pipeline for the second hydraulic line 13 in the area from the second detachable connection 22 to the tee 15 in the form of high pressure rubber pipelines with a quick connection. This design allows you to effectively use the device to determine the density of the sample taken, for example, by an indirect method, by weighing the housing 1 before and after sampling the combined sample.

In alternative embodiments, the locking element 12 may be rigidly connected to the first end wall 1 _{1 of the} housing 1, and the locking element 14 may be rigidly connected to the second end wall 1 _{2 of the} housing 1, i.e. in this case, the locking elements may be part of the housing 1.

The inlet and outlet of the bypass line 9 may be equipped with connecting elements 23 (indicated by one position) adapted to connect the device to the fluid transporting pressure medium pipeline and used to shut off the bypass line 9 from the pressure pipe (not shown).

Exit 2 _{2 of the} sampler 2 works to drain.

Sampler 2 can be performed in any design, including may not be automatic. The most appropriate use of an automatic sampler as disclosed in patent No. 39707 (publ. 10.08.2004).

In the case of an automatic sampler, the device is further provided with a sampler control unit (not shown).

The automatic sampler 2 provides operation in the following modes:

- selection of a given number of single samples for a given time (single samples are taken at regular intervals);

- selection of a given number of single samples during the passage of a given volume of pumped fluid (single samples are taken through equal values of the volume of the product represented by the signal from an external device);

- control of sampling directly by a signal from a discrete device (controller, computer).

In the embodiment of the device shown in FIG. 2, the sampler 2 has a sampling circuit (not shown) with an input 2 ₁ and an additional output 2 ₃ .

The drain line 11 is connected to the reservoir 24, and the outlet 2 _{2 of the} sampler 2 is connected to the first auxiliary tank 25 through a drain pipe 2 ₄ .

In contrast to the design shown in FIG. 1, the device is additionally equipped with an auxiliary pipeline for the fourth hydraulic line 26, which is connected to the sampler 2 through an additional output 2 _{3 of the} sampling circuit 2 not shown and connected to the second hydraulic line through the sampling circuit 2.

The fourth hydraulic line 26 with a locking element 27 installed on it and an air pipe 28 is designed to remove air from the second and third hydraulic lines, the sampling circuit of the sampler 2, as well as the second chamber 5 of the housing 1 after connecting the sampler 2 without turning it on. This provides a quick release of the device from the air when preparing the device for sampling a combined sample (a given number of samples) and bleeding (relieving) pressure from the second and third hydraulic lines, as well as the sampling circuit 2 for conducting preventive and repair work with the device without disconnecting the device from pressure pipeline with preservation of the already taken combined sample under working pressure, if the shut-off elements 14 and 18 are blocked with the previously shut-off element 12.

Ball valves (in the case of an embodiment with increased electrical safety) or controlled electrovalves (in an embodiment with automatic control of the entire device) can be used as locking elements.

The first auxiliary vessel 25 is adapted to collect the fluid sampled by the sampler 2 from the second chamber 5. Connected to the output 2 _{2, the} first auxiliary vessel 25 may be provided with a limit level sensor of the fluid therein (not shown).

In the embodiment shown in FIG. 2, the device is equipped with a second auxiliary tank 29 connected to the sampler 2 and adapted to collect fluid passed through the sampling circuit of the sampler 2 in preparation for operation. In a variant embodiment, it is possible to dispense with any one auxiliary capacity (or reservoir), using it sequentially for the purpose of preparing the device for operation, draining the combined sample from the housing 1 and the process of sampling the combined sample, having previously released it from the fluid before the next stage of work.

The volume of each auxiliary tank may be in the range of 0.5 cm ³ to 70,000 cm ³

In the embodiment shown in FIG. 3, the device is provided with a metal casing in the form of a first cabinet 30 and a metal casing located under it in the form of a second cabinet 31.

The cylindrical housing 1 is mounted on the outside of the cabinets on an arm (support) 32 and tool holders 33 attached to the wall of the second cabinet 31. The housing 1 can be fastened to tool holders 33, for example, using clamps.

In the first cabinet 30 there is a sampler 2 and a first auxiliary vessel 25 connected to it by a drain tube 2 _{4. The} vessel 25 may be provided with a fluid level sensor (not referred to as a level sensor), not shown in FIG. 3. When it is triggered (the state is “closed”), the sampling is stopped and the emergency sound and light alarms are turned on.

On the wall of the first cabinet 30 facing the cylindrical body 1, holes are made for fittings of the pipeline of the second hydraulic line 13 and the pipeline of the fourth hydraulic line 26.

In the lower part of the second cabinet 31 there is a second auxiliary tank 29, the neck of which is connected with the air pipe 28.

On the wall of the second cabinet 31 facing the cylindrical body 1, holes are made for pipe fittings of the third hydraulic line 16, the fourth hydraulic line 26, the first hydraulic line 6 and the bypass line 9.

In the upper part of the second cabinet 31, above the second auxiliary tank 29, a part of the pipeline of the first hydraulic line 6 with valve 8 and part of the pipeline for the third hydraulic line 16 with locking elements 17 and 18, passed through the hole in its cylindrical body 1 facing side, is placed, pressure gauge 20 and filter 19.

Cabinets 30 and 31 are made taking into account the requirements of regulatory documents governing the installation and use of electrical equipment in hazardous areas.

Each cabinet can be made with a height of essentially 590 mm, a width of essentially 360 mm, and a depth of essentially 140 mm.

Cabinets 30 and 31 can be made with or without doors. It is possible to fix them on a supporting structure (wall, brackets) through holes in the rear walls. In an alternative embodiment, the cabinet 30 and the cabinet 31 can be made in one piece.

The mutual arrangement of the cabinets is determined based on the features of the layout of the operating site, while their location is optimal in which the first cabinet 30 is installed above the second cabinet 31.

Depending on the variant versions of the device, its components can be fixed on some supporting structure or using one of any cabinets, or with both cabinets. In addition, the entire device can be placed in one cabinet having suitable dimensions for this.

Preparation shown in figure 2 of the device for operation is as follows.

Before starting work, check the tightness of the joints. To do this, close all the shut-off elements, turn on the fluid flow through the bypass line 9 and, according to the testimony of the pressure gauge (pressure gauge), leakages in the connections to the shut-off elements 7 and 18, including the shut-off elements themselves, are judged. Opening the shut-off elements 14, 18, 7 and 17 in the device creates a pressure equal to the pressure in the pipeline through which the fluid is transported, i.e. create working pressure, after which the shut-off elements 7 and 18 are closed and, according to the readings of the pressure gauge 20, leaks in the hydraulic line system are judged and the shut-off element 17 is closed.

In the absence of leaks, the next step removes air from the first chamber 4 of the housing 1 and the third hydraulic line 16, for which, leaving the shut-off element 14 open, the shut-off elements 12, 18 and 17 are opened. In this case, the fluid passing through the third hydraulic line 16 through the locking element 18, the filter 19, the pressure gauge 20, the locking element 17, the tee 15 and the locking element 14, fills the second chamber 5. The piston 3 is lowered and displaces the liquid and air (gas) located in the first chamber 4 of the housing 1, through the locking element 12 and drain line 11 into the tank 24.

The moment of filling of the second chamber 5 with the fluid is determined by the readings of the pressure gauge 20 (i.e., by increasing and stabilizing the pressure readings identical to the pressure in the pressure pipe) and by stopping the discharge of the fluid into the tank 24, as a result of which the piston 3 is located at the lower end the walls 1 _{1 of the} housing 1 and close the locking element 17.

Next, air is removed from the first hydraulic line 6 and, respectively, from the upper part of the valve 8. For this, the shut-off element 27 is closed and the shut-off element 12 is open and the shut-off elements 14 and 18 are closed, the shut-off element 7 is opened and the fluid is passed through the tee 10, shut-off element 12 and a drain line 11 into the tank 24 until a fluid without signs of air appears, after which the shut-off elements 12 and 7 are closed.

When used in the design of the device of flexible high-pressure hoses, in particular for the first hydraulic line 6, it is possible to facilitate the process of removing air from the first chamber 4 and the first hydraulic line 6, if before removing air from the first hydraulic line 6, turn the housing 1 so that it stands vertically, but the first end wall 1 ₁ (shown in FIG. 1 and FIG. 2 lower) turned out to be higher than the second end wall 1 ₂ (shown in FIG. 1 and FIG. 2 upper).

Next, air is removed from the second chamber 5 and the sampling loop 2. To do this, close the shut-off element 18 and open the shut-off elements 14, 27 and 7. At the same time, the fluid from the pressure pipe through the bypass line 9 through the first hydraulic line 6 through the valve 8 and the locking element 7 fills the first chamber 4, moving the piston 3 upward and displacing the fluid with residual air (gas) from the second chamber 5 through the sampling circuit 2, along the fourth hydraulic line 26 through the locking element 27 and the air pipe 28 the second auxiliary tank 29. The moment of filling of the first chamber 4 is determined by the termination of the discharge of liquid from the air pipe 28, after which the locking elements 27 and 7 are sequentially closed.

Air removal from the first, second and third hydraulic lines before taking a given number of individual samples can be carried out both in the form of the above-described combination, and separately. The same applies to the possibility of removing air before taking a given number of individual samples from the first and second chambers of the housing

Then, to bring the device to its initial state for sampling the combined sample, the piston 3 is moved to the first end wall 1 _{1 of the} housing 1, filling the second chamber 5 with fluid. For this, the locking element 7 is left closed, the locking element 14 is left open and the locking elements 18 are opened in series, 12 and 17. When the second chamber 5 is filled with fluid, the piston 3 moves to the first wall 1 ₁ , displacing the fluid from the first chamber 4 into the reservoir 24.

The moment of filling of the second chamber 5 with the fluid is determined by the readings of the pressure gauge 20 (i.e., by increasing and stabilizing the pressure readings identical to the pressure in the pressure pipe) and by stopping the discharge of the fluid into the tank 24, as a result of which the piston 3 is located at the bottom cover 1 _{1 of the} housing 1 and close the locking elements 17, 12 and 18, and then open the locking elements 7 and 14.

In the initial state for sampling the combined sample, the second chamber 5 is completely filled, and the piston 3 is located at the first wall 1 _{1 of the} housing 1, while the locking elements 12, 17, 18, 27 are closed, and the locking elements 7 and 14 are open.

To collect the combined sample, an automatic sampler 2 is put into operation.

At the time of sampling each single sample, a fixed amount of fluid is taken by the sampler 2 from the chamber 5 through the second hydraulic line 13 through the shut-off element 14, the inlet 2 _{1 of the} sampler 2 and its outlet 2 ₂ into the tank 25 through the drain pipe 2 ₄ , and the same amount of fluid medium from the bypass line 9, passing under the influence of the pressure drop along the first hydraulic line 6 through the valve 8 and the shut-off element 7, fills the first chamber 4. The volume of fluid in one sampling is equal to the volume of a single (point) sample installed on the machine Sampler 2.

The sampling is completed after the required volume of the combined sample is set, which is set in the settings of the sampler 2, or when the piston 3 reaches the upper end wall 1 _{2 of the} housing 1. In the chamber 4, the selected combined sample is maintained under pressure equal to the pressure until the sampler 2 is operated in the constant flow path of the fluid (bypass line 9) and, accordingly, in the pressure pipe, i.e. under working pressure.

To drain the sample, close the shut-off element 7, open the shut-off elements 18, 12 and 17 sequentially, thereby filling the second chamber 5 along the third hydraulic line 16 with fluid. When this piston 3, the fluid from the first chamber 4 is displaced along the drain line 11 into a container for a combined sample, for example a reservoir 24. Next, the device is restored to its original state by closing the locking elements 12, 17 and 18 and opening the locking elements 7 and 14.

In embodiments of the housing 1, the locking elements 7 and 14 are removable at the end of the sampling of the combined sample (the locking elements 12, 17, 18, 27 are closed earlier), the housing 1 is disconnected at the places of detachable (quick disconnect) connections 21 and 22, and then the combined sample is delivered to the place of its analysis directly in the housing 1 (housing assembly with locking elements 7, 12, 14).

The selected combined sample is stored in the housing 1 under operating pressure, thereby providing a high degree of preservation of the composition of the sample fluid. The execution of the housing 1 removable allows you to determine the density of the fluid (combined sample) located in it by an indirect method by weighing the housing 1 before and after sampling the combined sample. The use of quick couplings allows you to prevent air from entering the pipelines of the hydraulic lines of the device at the moments of disconnection and connection of the housing 1, which eliminates the need to remove air from them during the subsequent connection of the housing 1 and bringing the device to its original state for sampling the combined sample.

Compared with the prototype, the pump and the need for a second fluid are excluded, which greatly simplifies the device and increases its ease of use.

The placement of the elements of the device in the cabinet provides its quick preparation for work, protection against atmospheric influences and ease of use.

Prototypes of the device have been successfully tested at operational and commercial metering stations for crude and marketable oil in a wide range of pressures, temperatures, and viscosities of fluids.

Claims (25)

1. A device for sampling from a pressure pipe, containing a housing mounted in the housing with the possibility of moving a piston, dividing the internal cavity of the housing into two chambers, adapted to take a given number of individual samples, a sampler, pipelines and shut-off elements for forming a system of hydraulic lines connecting the aforementioned a housing with a pressure pipe and a sampler, while the hydraulic line system has a section made in the form of a bypass line adapted for continuous passage of fluid flow from the pressure pipe during sampling of a given number of unit samples, the first chamber being connected to the bypass line through the first hydraulic line with the valve installed on it, and the second chamber through the second hydraulic line connected to the inlet of the sampler, characterized in that the second the camera through the third hydraulic line is connected to the bypass line. 2. The device according to claim 1, characterized in that it is arranged to remove air from the first, and / or second, and / or third hydraulic lines before taking a given number of single samples. 3. The device according to claim 1 or 2, characterized in that it is arranged to remove air from the first and / or second chamber chambers before taking a predetermined number of single samples. 4. The device according to claim 1, characterized in that it further comprises at least one filtering means. 5. The device according to claim 1, characterized in that the sampler is an automatic sampler. 6. The device of claim 1, characterized in that it includes means for measuring pressure. 7. The device according to claim 1, characterized in that it is configured to disconnect the housing from the hydraulic line system. 8. The device according to claim 1, characterized in that the housing is cylindrical. 9. The device according to claim 1, characterized in that the total volume of the first chamber and the second chamber essentially corresponds to the volume of a given number of single samples. 10. The device according to claim 1, characterized in that it further comprises at least one auxiliary capacity. 11. A device for sampling from a pressure pipe, containing a housing mounted in the housing with the possibility of moving a piston, dividing the internal cavity of the housing into two chambers, adapted for sampling a given number of single samples, a sampler, pipelines and shut-off elements for forming a system of hydraulic lines connecting the housing with a pressure pipe and a sampler, while the hydraulic line system has a section made in the form of a bypass line adapted for continuous passage and part of the fluid flow from the pressure pipe during sampling of a given number of unit samples, the first chamber being connected to the bypass line through the first hydraulic line with the valve installed on it, and the second chamber through the second hydraulic line connected to the inlet of the sampler, characterized in that the second the camera through the third hydraulic line is connected with the bypass line, as well as the fact that it further comprises at least one cabinet, through the wall of which at least one n of pipelines intended for forming the hydraulic line system. 12. The device according to claim 11, characterized in that a pipeline for a second hydraulic line is passed through the cabinet wall, while the sampler is located in the cabinet. 13. The device according to p. 12, characterized in that it contains an auxiliary tank located in the cabinet, the sampler being hydraulically connected to the auxiliary tank. 14. The device according to claim 11, characterized in that pipelines for the first and third hydraulic lines are passed through the cabinet wall, while the valve installed on the first hydraulic line is placed in the cabinet. 15. The device according to 14, characterized in that it comprises an auxiliary container located in the cabinet, the auxiliary container being hydraulically connected to the sampler by means of an auxiliary pipe that is passed through the cabinet wall. 16. The device according to 14, characterized in that the housing is mounted on the wall of the cabinet with the possibility of its removal. 17. The device according to claim 11, characterized in that it contains two cabinets, through the wall of the first of which the pipeline for the second hydraulic line is passed, and through the wall of the second cabinet the pipelines for the first and third hydraulic lines are passed, while the sampler is located in the first cabinet, and the valve installed on the first hydraulic line is located in the second cabinet. 18. The device according to 17, characterized in that it comprises a first auxiliary container located in the first cabinet hydraulically connected to the sampler and a second auxiliary container located in the second cabinet, the second auxiliary container being hydraulically connected to the sampler through an auxiliary pipeline that is passed through walls of the first and second cabinets. 19. The device according to 17, characterized in that the first cabinet and the second cabinet are made in one piece. 20. The device according to claim 11, characterized in that it is configured to disconnect the housing from the hydraulic line system. 21. The device according to claim 11, characterized in that the height of the said cabinet is essentially 590 mm with a width equal to essentially 360 mm and a depth equal to essentially 140 mm. 22. The device according to claim 11, characterized in that the sampler is an automatic sampler. 23. The device according to claim 11, characterized in that it is configured to remove air from the first, and / or second, and / or third hydraulic lines before taking a predetermined number of single samples. 24. The device according to item 23, wherein the device is configured to remove air from the first and / or second chambers before sampling a given number of single samples. 25. The device according to claim 11, characterized in that said cabinet is made of metal.

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