RU105399U1 - DEVICE FOR TAKING SAMPLES FROM PIPELINE - Google Patents

Abstract

 A device for sampling from a pipeline consisting of a housing, a hollow stem with a gander and a shut-off valve, as well as an stuffing box, characterized in that the housing is made in the form of a replaceable nozzle, on the inner surface of which grooves are made parallel to its axis, allowing the guide to move along them a roller rigidly fixed to a hollow rod connected by means of a coupling to a spindle of a screw mechanism mounted in the upper part of the housing, while the stuffing box is threadedly connected to the base, to erhney part housing which is rigidly attached, and the lower part of the base is formed as a flange with holes for bolted connection.

Description

The utility model relates to the oil and gas industry and is intended to be implemented in devices for sampling liquid hydrocarbons transported under high pressure in large diameter pipelines.

A probe is known from the prior art, which includes a hollow body with a thread and a graduated scale, a sealing assembly consisting of a nut with fluoroplastic seals, pressed from both ends by a steel ring and a sleeve. The shut-off valve and gander are mounted on the hollow body. To fix the inlet in the working position, the sealing assembly contains a tightening nut, collet, ring, and nut (PACT inlet. 139000.001-01 (65): operation manual RAST. 139000.001-01 (65) RE. - Sonar Research and Production Enterprise, 2005).

As one of the disadvantages of this device, it should be noted that it is intended for use in pipelines of underground laying, and this determines its high material consumption, due to the need to use extenders of a hollow body of large length, and, as a result, the inconvenience of using above-ground and shallow pipelines ( up to 1 m) underground installation.

Known, adopted by us for the prototype, a rod sampler containing a pipeline, a gland device, a housing in the form of a pipe welded to the pipeline, a ball valve and a hollow rod. The hollow rod is removable with the possibility of its descent and sampling of liquid from any level in the pipeline and contains a measuring scale installed in its lower part, and in the upper part of the hollow rod there are handles and a tap with a valve, and the hollow rod is made with the possibility of installing samples witnesses for measuring the rate of internal corrosion of the pipeline (RF Patent No. 40763, IPC ⁷ ЕВВ 49/08, G01N 1/10, publ. September 27, 2004).

One of the disadvantages of this sampler is the inconvenience of its use in sampling from a large diameter pipeline. In this case, it is necessary to extend the hollow rod, and this, in turn, increases the total force required to enter the hollow rod by pressure into the pipeline.

The main disadvantage of both of the device descriptions given in this section is the insecurity of their use due to the lack of reliable fixation of the hollow body (stem) in the stuffing box and the need for a lot of force to enter the hollow stem with pressure into the pipeline. This disadvantage can be explained by the following calculation under the following conditions: the diameter of the hollow rod d _w - 0,016 m; pipeline pressure p - 4.0 MPa; stuffing box height h - 0.04 m.

The force applied to the hollow rod (Q ₀ ) to overcome the pressure in the pipeline is calculated by the following formula:

Given the above conditions, we have:

The force exerted on the hollow stem to overcome the friction force in the stuffing box (Q _c ) is calculated using the following formula:

,

where f is the stuffing friction force factor.

We have:

H

The total force required to enter the hollow rod by pressure into the pipeline is calculated by the following formula:

Q = Q ₀ + Q _C ,

We have:

Q = 803.84 + 321.54 = 1122.38, N

So, to enter a hollow rod with a diameter of 0.016 m by pressure into the pipeline at a pressure in it of 4.0 MPa, a total force of 1122.38 N or 112.24 kg is required.

Table 1 shows the dependences of the force values on the hollow stem (without taking into account the force exerted on the hollow stem to overcome the frictional force in the gland) on the diameter of the hollow stem and pressure in the pipeline.

Table 1

Rod diameter d _W , m The pressure in the pipeline p, MPa 1,0 2.0 4.0 6.0 0.016 200.96 401.92 803.84 1205.76 0,020 314.00 628.00 1256.00 1884.00

The objective of the claimed utility model is to create a device that eliminates the above disadvantages of the analogue and prototype.

The technical result of the utility model is to reduce the effort for introducing a hollow rod by pressing pressure into the pipeline, as well as expanding the arsenal of technical means.

The task in the device for sampling from the pipeline, consisting of a housing, a hollow rod with a gander and a shut-off valve, as well as an stuffing box is solved by the fact that the housing is made in the form of a replaceable nozzle, on the inner surface of which grooves are made parallel to its axis, providing movement along a guide roller fixed thereon to a hollow rod connected by means of a coupling to a spindle of a screw mechanism mounted in the upper part of the housing, while the stuffing box is connected by a thread with a base, the upper part of which is rigidly attached to the housing, and the lower part of the base is made in the form of a flange with holes for bolt connection.

From the technical literature it is known that for valves with a retractable spindle and a handwheel with a spindle diameter d _sp = 0.026 m and a flywheel diameter D = 0.320 m, the maximum force on the spindle is Q ₀ = 20 kN. (Handbook of the designer of pipe fittings. -L.: Mechanical engineering. Leningrad. Department, 1987. - 518 s: with ill.)

The inventive utility model is illustrated using Fig., Which shows a device for sampling from a pipeline mounted on a pipeline.

A device for sampling from a pipeline consists of a housing 1 made in the form of a replaceable nozzle, a hollow rod 2 with a gander 3, made with a thread for attaching a container for sampling, and a shut-off valve 4, as well as an stuffing box. A screw mechanism is mounted in the upper part of the housing 1, including a spindle 5, a driving nut 6 and a steering wheel 7. The spindle 5 is connected to the hollow stem 2 by means of a coupling 8. In the upper part of the hollow stem 2, a guide roller 9 is fixedly fixed with a pointer 10. On the inner surface of the housing 1, grooves are made parallel to its axis (not shown in FIG.), Providing a linear movement of the guide roller 9 with an indicator 10 along them. Through the housing 1, through grooves 11 are made parallel to its axis, providing free movement of fixed to the floor th rod 2 of the gander 3, the shutoff valve 4 and the guide roller 9 with a pointer 10. The lower part of the housing 1 is rigidly connected to the base 12, in turn the lower part of which is made in the form of a flange with holes for the bolt connection 13 and the sealing groove for the o-ring 14 A stuffing box is connected to the upper part of the base 12 by means of a thread, consisting of a compression nut 15, a packing 16 and an oil seal housing 17. A measuring scale 18 is applied on the outer surface of the housing 1 from the pointer 10 along the through groove 11.

A device for sampling from a pipeline works as follows.

At the sampling point of the pipeline 19, the connecting dimensions of the valve flange (ball valve) 20 installed on the pipeline 19 are determined. If the sizes of the valve flanges 20 and the base 12 are suitable, the device for sampling from the pipeline is mounted on the valve 20. In case of size mismatch the flanges of the valve 20 and the base 12 use a flange sub 23, which is installed on the valve 20 for various versions of the flanges of the base 12 and the valve 20. When using a flange sub 23 th part of the hollow rod 2 using an adapter 21 connect a hollow interchangeable pipe 22, the length of which corresponds to the length of the flange sub 23.

To control the pressure during sampling, a pressure gauge 24 is installed in the base 12. By rotating the steering wheel 7, the spindle 5 is moved to its highest position, which in turn moves the hollow stem 2, and a device for sampling from the pipeline is installed on the flange adapter 23 or on the valve 20. After fixing the bolted connection 13 with a tightening of the sealing ring 14, open the valve 20. Then, by turning the steering wheel 7, the hollow rod 2 is moved to the required level in the pipeline 19. The required sampling level is determined by th scale 18. Join Husak container 3 for sampling (Fig. not shown). Open the valve 4, and through the gander 3 take samples in the container for sampling. The valve 4 is closed and the hollow rod 2 is raised to the highest position by reverse rotation of the steering wheel 7. Close the valve 20, open the valve 4 and release the pressure inside the base 12, fixing the pressure drop by the pressure gauge 24. After that, the sampling container is disconnected from the gander 3 and, disconnecting the bolt connection 13, the sampling device is removed from the pipeline.

Claims (1)

A device for sampling from a pipeline consisting of a housing, a hollow rod with a gander and a shut-off valve, as well as an stuffing box, characterized in that the housing is made in the form of a replaceable nozzle, on the inner surface of which grooves are made parallel to its axis, allowing the guide to move along them a roller rigidly fixed to a hollow rod connected by means of a coupling to a spindle of a screw mechanism mounted in the upper part of the housing, while the stuffing box is threadedly connected to the base, to erhney part housing which is rigidly attached, and the lower part of the base is formed as a flange with holes for bolted connection.