RU2682812C1 - Telescopic filling pipe system for automated installations of clock filling (tfp aicf system) - Google Patents

Abstract

FIELD: transportation.SUBSTANCE: invention relates to systems of telescopic filling pipe for automated installations of clock filling (TFP AICF) and serves for filling oil and oil refining products, and also petrochemistry in rail tank cars and is used in oil refineries, petrochemistry, oil tank farms, and also in gas processing and gas chemistry. System of telescopic filling pipe for automated installations of clock filling includes frame 1, on which at least one telescopic filling pipe is installed, containing guide tube of telescope 2, inner filling pipe 3, which is telescope retractable part equipped with end locking plate 8 equipped with at least two O-rings, steam-collecting pipe 4 made with possibility to slide upper edge along telescope 2 guide tube, and lower inner surface with possibility of resting on end locking plate 8, wherein pipe 4 is equipped with nozzle for venting vapors 9 and a probe configured to control level of liquid filling into tank and fixed on lower surface of pipe 4, hydraulic drive cylinder of telescope 5 located inside and in upper part of guide tube 2 and equipped with rod of hydraulic drive cylinder of telescope 6, in which is mounted sensor of registration of telescopic filling pipe extension path and on lower part of which is fixed end locking plate 8, and mechanism for blocking spontaneous lowering of telescopic filling pipe, installed in upper part of cylinder of telescope 5; product supply union 7 into internal filling pipe 3 installed in upper part of pipe guide 2, and telescope of vapors removal 10, connected to nozzle of vapors discharge 9; and drip tray 13, installed on frame 1 with possibility of collecting product residues, digging from end stop plate 8.EFFECT: technical results of the declared invention are as follows: improvement of safety indices in the field of technical safety, in operation of objects of explosion-fire hazardous production for zone 1 and zone 0, in the field of environmental safety and labour protection, and increased efficiency of AICF due to reduced number of stops and reduced time of production downtimes, reduced number of repairs, increased time between overhauls.5 cl, 3 dwg

Description

FIELD OF THE INVENTION

The invention relates to telescopic filling pipe systems for automated clock loading installations (TNT AUTN) and is used for loading oil and oil products, as well as petrochemicals into railway tanks, and is used in oil refining, petrochemical, oil depots, as well as gas processing and gas chemistry enterprises .

State of the art

AUTN - an automated clock loading unit - is the Russian name for the loading units operating on the principle developed in Europe, and primarily in Germany.

The European name for this principle is “ON SPOT”. To date, only a few European companies have fully owned ON SPOT technology. MARCON is a leading ON SPOT technology company. The ON SPOT principle was developed in Europe, as part of the technical modernization of production in the 60s - 70s of the 20th century and in the process of bringing the existing methods of loading to technical and environmental safety and labor standards that were becoming tougher at that time, and as to the requirements of optimizing economic indicators and the maximum exclusion of manual labor and the human factor.

As a result of the introduction of the ON SPOT (clock loading) filling method, the front of the technological equipment placement decreased from several hundred meters (depending on the number of railway tanks in the loading rate) to 20 - 40 meters.

This became possible due to the use of a “large diameter” telescopic filling pipe with a throughput (throughput) of filling up to 700 m3 / h and driven in three dimensions through an automatic manipulation system by the operator from the operator’s room, which is located directly on the AUTN explosion protection conditions are provided.

One of the founders of the company MARKON (Hamburg) was one of the first developers of a telescopic filling pipe for the technology of clock loading.

The name ON SPOT (clock filling) itself reflects the basic principle of the technology, namely, the tanks began to be moved by the shunting unit in automatic mode as each of them was sequentially loaded. Repeated loading operations and loading times were called TACT or ON SPOT in “one place”.

One of the main nodes of AUTN is a telescopic filling pipe.

Manufacturers of telescopic bulk tubes such as Dipl.-Ing. Are known in the art. SCHERZER GmbH, Germany and OJSC Prompribor; Russia.

Known devices have:

- A system of protection against overflow, based on the principle of the pressure difference of technical air supplied to a long probe tube into the neck and through a second hole without a tube into the neck cavity or overflow protection system, using a level sensor Liquiphant, operating by vibration principle and fixed on the lower plane of the design of TNT AUTN.

In the event that the normal end of filling does not work automatically, the product reaches the probe tube and closes the outlet of the technical air. This creates a pressure difference between the air in the probe and in the open hole. The control system records the pressure difference and closes the shut-off valves in emergency mode.

In the case of liquifant: when the liquid level reaches the plug of the liquifant, the electronic unit of the device records the change in the frequency of vibration of the plug and sends a signal to the control system to close the shut-off valves in emergency mode.

With a pneumatic system, it is difficult to set the exact shutdown settings. Often, because of this, the specified amount of the loaded product is not filled into the wagon / tank, since overfill protection ends the filling process too early, due to an imaginary overflow.

The tube also breaks off; in this case, overflow protection does not work in non-standard situations and product overflow occurs.

Adjustment work is very costly, and the initially set values change very quickly during operation under the influence of weather conditions, pollution and mechanical damage.

When using a liquifant having a rigid structure protruding outward, the plug may be damaged on the edges of the tank hatch and / or on the structure in the tank hatch when the filling pipe is lowered into the neck of the tank, which leads to breakage or destruction of the sensor. In addition, due to the protruding fork, it is not possible to use a drip tray after the filling process.

- Measurement of the extension path of the TNT AUTN is carried out by a volumetric counter of hydraulic oil supplied to the cylinder of the filling pipe. In this case, an insufficiently accurate measurement of the extension path of the bulk pipe occurs, since the meter is not able to take into account all possible leaks and leaks of hydraulic oil.

As a result, the pipe deviates from the set position and violates the filling technology, which leads to a collision of the lower end plate with the structures inside the tank and to the destruction of the sealing surfaces around the perimeter of the end plate and the end plate itself or the too high position of the filling pipe in the tank, which leads to an unacceptable “falling jet” loading mode with a strong flow.

This leads to runoff of the residual product through violation of the sealing surfaces of the constipation onto the tank or on the railway track and into the pit of the balance; contamination with the glass product of tanks, railway tracks, structures and pit scales; to the occurrence of an explosive situation due to the vapors of the product flowing into the working area and into the pit of the balance; the need for washing and steaming of the installation structures from the product; the need to repair or replace the end plate; to the danger of accumulation of static electricity due to the filling of the "falling stream" in high flow mode.

- A vapor extraction telescope for venting product vapor during loading from a steam pipe, which is attached to a flange connection through a 90 ° outlet and works like a vertical Du150 telescope along TNT AUTN.

A movable pipe of a smaller diameter extends downward along with a steamhouse from a fixed pipe of a larger diameter. After the filling process is completed, condensate from the vapor exhaust pipe flows into the vapor exhaust telescope, accumulates in the annular space of the vapor exhaust telescope and leads to leakage of liquid phase accumulated in the vapor exhaust pipe from the couplings between the tubes of the telescope, as from an “inverted glass” .

- A product closure from an outlet with one sealing ring on a vertical sealing surface, subject to mechanical stress in the event of a collision with structures inside the neck of the tank and inside the tank itself. As a result, damage to the sealing ring and sealing surface occurs, which in turn leads to leakage of residual quantities of the product from the inner cavity of the filler pipe.

This leads to: the residual product draining through violations of the sealing surfaces of the constipation onto the tank or on the railway track and into the pit of the balance; contamination with the glass product of tanks, railway tracks, structures and pit scales; to the occurrence of an explosive situation due to the vapors of the product flowing into the working area and into the pit of the balance; to the need for washing and steaming of the installation structures from the product; the need for frequent replacement of the sealing rings and repair or replacement of the end plate;

- The locking mechanism of spontaneous lowering of the bulk pipe to fix the TNT AUTH in the initial (garage) position of the telescope retracted in its highest position. In this position, the pipe is in the intervals between loading operations, for a short time, during loading of the railway tank rates and for a long time (from several hours to a day), between loading of individual railway tank rates. Due to the natural wear and tear of the gaskets of the hydraulic system, the stem of the internal vertical hydraulic cylinder begins to lower spontaneously over time. To block the spontaneous lowering of the filler pipe, clamping pins in the upper part of the drive hydraulic cylinder were used. The clamping pins wear out during operation, which leads to the destruction of the locking mechanism, to the destruction of the cylinder structure and spontaneous lowering of the filling pipe.

Disclosure of invention

The objective of the claimed invention is to develop the design of a telescopic filling pipe system for automated clock loading installations, which will eliminate the disadvantages of the prior art, improve the design of the TNT AUTH and accordingly the work of the AUTH in terms of safety and operational reliability.

The technical results of the claimed inventions are:

- improvement of safety indicators in the field of technical safety, during the operation of objects of explosive and fire hazardous industries for zone 1 and zone 0, in the field of environmental safety and in the field of labor protection;

- increase in AUTN productivity due to a decrease in the number of shutdowns and a decrease in production downtime, a decrease in the number of repairs, and an increase in the overhaul time.

The achievement of the claimed technical result is ensured by the design of the telescopic filling pipe system for automated clock loading installations, which includes a frame on which at least one telescopic filling pipe is installed, containing the telescope guide tube, an internal filling pipe, which is a telescope extension part provided with an end locking plate equipped with at least two o-rings, steam pipe made with the possibility of how the upper edge along the guide tube of the telescope, and the lower inner surface with the possibility of abutment on the end locking plate, while the steam pipe is equipped with a vapor outlet fitting and a probe made with the ability to control the level of liquid filling into the tank and fixed on the lower surface of the steam pipe, hydraulic drive a telescope cylinder located inside and in the upper part of the guide tube and equipped with a rod of a telescope hydraulic drive cylinder into which the sensor is mounted taking into account the extension path of the telescopic filling pipe, and on the lower part of which the end locking plate is fixed, and the mechanism for blocking the spontaneous lowering of the telescopic filling pipe, installed in the upper part of the telescope cylinder. Also, the telescopic pipe contains a nozzle for supplying the product to the inner filler pipe installed in the upper part of the guide pipe, and a vapor exhaust telescope connected to the vapor exhaust nozzle. The system includes a drip tray mounted on the frame with the ability to collect product residues, digging from the end of the locking plate.

According to an embodiment of the invention, the probe contained in the system may be a capacitive type probe, and the sensor for taking into account the extension path of the telescopic filler pipe may be a high-precision sensor.

According to another embodiment of the system, at least two o-rings with which the end locking plate is equipped can be mounted on the vertical surface of the end locking plate and on the horizontal sealing surface of the steam pipe.

Brief Description of the Drawings

In FIG. 1 shows a general view of a telescopic filling pipe system for an automated clock loading installation.

In FIG. 2 is a sectional view of a telescopic filling pipe for an automated clock loading installation.

In FIG. 3 shows a general view of the drip tray.

Below is a list of item numbers indicated in the figures:

1. - frame;

2. - guide tube of the telescope;

3. - an internal bulk pipe;

4. - steam pipe;

5. - hydraulic drive cylinder of the telescope;

6. - the rod of the hydraulic drive cylinder of the telescope;

7. - product supply fitting;

8. - end locking plate;

9. - vapor outlet fitting;

10. - telescope for vapor recovery;

11. - the outer lower movable tube of the vapor recovery telescope;

12. - the inner upper non-movable pipe of the telescope for vapor recovery;

13. - drip tray;

14. - relay for monitoring the level of accumulated product in the drip tray;

15. - a rotary mechanism with a pneumatic drive;

16. - low-flow pump with pneumatic drive.

The implementation of the invention

The solution to the above problem and the achievement of the claimed technical result is realized due to the invention, which is generally disclosed in the drawings.

The TNT AUTN system (see Figs. 1 and 2) includes:

frame 1 (shown in Fig. 2),

telescopic bulk pipe, which consists of:

- the guide tube of the telescope 2, rigidly mounted on the frame 1;

- the inner filler pipe 3, which is a telescope extension and is equipped with an end locking plate 8, mounted on the lower end of the inner filler pipe 3 and equipped with 2 o-rings, along the vertical and horizontal sealing surfaces;

- a steam collection pipe 4, which slides with its upper edge along the guide tube of the telescope 2, and the lower inner surface lies on the end locking plate 8 of the inner bulk pipe 3;

- a hydraulic cylinder driven telescope 5 located inside the axis of the telescope and fixed in the upper part of the guide tube 2;

- the stem of the hydraulic drive cylinder of the telescope 6, on the lower part of which an end locking plate 8 is fixed;

- a product supply fitting 7, located in the upper part of the guide pipe 2, through which the product is fed into the inner filling pipe 3;

- a vapor outlet 9 located on the steam pipe 4, through which the vapor-air mixture accumulated during loading is discharged to the vapor exhaust system;

- a vapor recovery telescope 10 connected to a vapor exhaust fitting 9, through which the vapors collected in the steam collection pipe 4 are discharged to the vapor exhaust system;

- a high-precision sensor for measuring the extension path of the TNT AUTH mounted in the stem 6 of the hydraulic drive cylinder of the telescope 5;

- the mechanism for blocking the spontaneous lowering of the TNT AUTH mounted in the upper part of the hydraulic drive cylinder of the telescope 5;

- a probe of a capacitive type as a system of protection against overflow, mounted on the lower surface of the steam pipe 4; and

drip collector 13 mounted on the frame 1 and used to collect product residues digging from the end of the locking plate 8 (see Fig. 1 and 3).

All elements of the TNT AUTN system, as well as additional systems (depending on the task), are located on frame 1, which can significantly expand the placement capabilities of systems and devices, without additional design changes and additions to the TNT AUTN, and provides ease of maintenance.

On the bottom surface of the steam pipe 4, a capacitive type probe is fixed for emergency control of the level of liquid filling into the tank, the so-called overflow protection system (not shown conditionally). The probe is made in the form of a flexible conductor with a core at the end, which is lowered into the neck of the tank when the steam pipe 4 sits on the edges of the neck. If the liquid level reaches the probe in the cavity of the neck of the tank (emergency overflow situation), the electro-capacitive characteristics of the probe change and the system receives a signal for emergency shut-off valve closure.

Mounted in a control cabinet, a relay for self-monitoring and shutdown (level gauge), when the probe is triggered, acts directly on the shut-off product ball valves and simultaneously sends a status signal to the controllers of the AUTN installation.

An additional advantage of the capacitive probe is that due to the flexibility of the probe itself, it is not subject to mechanical damage when hitting obstacles and does not interfere with the extension of the drip tray 13 under the bulk pipe.

Directly in the rod 6 of the hydraulic drive cylinder of the telescope 5 is mounted a high-precision touch sensor taking into account the extension path of the TNT AUTH (not shown).

A head with an electronic converter and a cable entry is mounted in the upper part of the telescope’s hydraulic drive cylinder 5. The probe from the electronic converter is mounted in the internal cavity of the hydraulic drive rod 6. A magnetic washer is floating on the probe, which moves with the rod along the probe when the inner filling pipe is pulled out telescope 3. The distance between the head with an electronic transducer and a magnetic washer increases and the electrical capacitance indicators accordingly change which are converted to 0-24 mlA signals, which in turn are transmitted to the TNT AUTH system control system. The AUTH control system, based on the received signals, stops the internal filling pipe 3 of the TNT AUTH at a predetermined extension depth. The SPS controller at each point in time has accurate information on how much the inner filler pipe is extended. Thus, it is possible to precisely control that the TNT AUTN is in a precisely set position during extension / retraction and during each operation of the filling process and to prevent collisions with parts and assemblies inside the tank.

A vapor exhaust telescope 10 is mounted to the vapor exhaust fitting 9 located on the steam collection pipe 4 and is flanged through a 90 ° outlet. It is located and extends parallel to the TNT AUTN and in which the inner pipe of smaller diameter 12 is stationary and the outer pipe of the exhaust telescope is stationary vapors of 11 larger diameters. Thus, the conjugation of the inner and outer tubes of the vapor recovery telescope 10 is transferred from the lower to the upper point of the telescope. This design of the telescope eliminates leakage into the working area of product residues and accumulated condensate from the exhaust vapors.

An end locking plate 8 is located at the lower end of the inner filler pipe 2, which forms a shutter between the telescope’s internal cavity and the atmosphere due to the sealing surfaces of the end locking plate 8 and the steam collection pipe 4 (see Fig. 2).

The configuration of the sealing surfaces is made in such a way that they are protected from mechanical damage in the event of a collision with the structures of the neck of the tank and the structures inside the tank due to the protrusion located below the vertical sealing plane, having a larger diameter and onto which the steam pipe 4 is lowered, which in turn is equipped with an additional O-ring on the lower horizontal surface.

Thus, in addition to protection against mechanical damage, better sealing is achieved due to the sealing ring on the vertical sealing plane of the end locking plate 8 and an additional sealing ring on the lower horizontal surface of the steam pipe 4, which it sits on the upper horizontal plane of the protrusion.

This design with a lower protrusion of a larger diameter eliminates mechanical damage to mating surfaces and sealing rings and prevents product leakage into the working area when the shutter closes.

The hydraulic drive cylinder of the telescope 5 and the stem of the hydraulic drive cylinder of the telescope 6 (see Fig. 2) are equipped with a locking mechanism (not shown), which is a self-locking clutch and serves to prevent spontaneous lowering of the TNT AUTN from the upper garage position.

Along the perimeter of the upper part, the rod 6 of the hydraulic drive cylinder 5 is equipped with balls that are pre-pressed towards the central axis of the rod.

The hydraulic drive cylinder of the telescope 5, in turn, is equipped with two conical shaped bushings.

When the rod 6 is raised to its initial position, the balls are unclenched by a conical-shaped inner sleeve fixedly mounted in the upper part of the telescope’s hydraulic drive cylinder 5. Moving further up the sleeve, the balls “fall through” into spherical grooves and are clamped by a movable external sleeve that extends in opposition to the rod 6 of the telescope hydraulic drive cylinder 5. The stem 6 of the telescope 5 hydraulic drive cylinder is securely locked. Due to the spherical and conical shapes of the mating elements, the structure is not subject to wear and does not lose its operational properties. Ensured reliable fixation of the filler pipe in the upper garage position.

TNT AUTH is equipped with an automatic drip collector 13 (see Figs. 1 and 3), which is mounted on the lower part of the frame 1 on the movable hinge of the rotary drive 15, which allows the drip collector 13 to be rotated 90 ° and automatically push it into the working position under the filling pipe immediately after full movement of the telescope and fixation of TNT AUTN in the upper initial position. The device consists of a container for collecting drops 13 and elements for its movement, a contral level relay 14 in a tank 13 for collecting drops and a low-flow pump 16 for pumping off accumulated product with piping.

When the TNT AUTH is in the upper garage position, the droplet-collecting container 13, which is in the form of a plate, is constantly located under the TNT AUTH and the residual product collected from the lower plane of the locking end plate 8 is collected (see Figs. 1 and 3). The level control relay 14 controls the amount of product in the container of the drip tray 13, and, if necessary, starts the low-flow pump with pneumatic actuator 16 (flow rate - max. 17 l / min; pressure head - max. 7 bar), which directs the collected product from the container of the drip tray 13 through hose into the system to collect the product drain. Immediately prior to the downward movement of the filler pipe, the droplet collecting container 13 is automatically rotated 90 ° away from the TNT AUTH by means of a rotary mechanism with a pneumatic drive 15 and the control system permits the TNT AUTH to go down. All functions are performed automatically by the installation management system.

Claims (12)

1. A telescopic filling pipe system for automated clock loading installations, including frame 1, on which at least one telescopic filling pipe is installed, containing telescope guide tube 2, an internal filling pipe 3, which is a telescope extension, provided with an end locking plate 8, equipped with at least two o-rings, a steam collection pipe 4, made with the possibility of sliding the upper edge along the guide tube of the telescope 2, and the lower inner surface - with the possibility of abutment on the end locking plate 8, while the pipe 4 is equipped with a vapor outlet 9 and a probe configured to control the level of liquid filling in the tank and fixed on the lower surface of the pipe 4, a telescope hydraulic drive cylinder 5, located inside and in the upper part of the guide tube 2 and equipped with a telescope hydraulic drive cylinder rod 6, into which a sensor for measuring the extension path of the telescopic filling tube is mounted and an end locking plate 8 is fixed on its lower part, and a spontaneous lowering locking mechanism telescopic bulk pipe mounted in the upper part of the cylinder of the telescope 5; a product supply fitting 7 to the inner filler pipe 3 mounted in the upper part of the guide pipe 2, and a vapor recovery telescope 10 connected to a vapor exhaust fitting 9, and drip collector 13 mounted on the frame 1 with the possibility of collecting product residues dripping from the end of the locking plate 8. 2. The system of claim 1, wherein the probe is a capacitive type probe. 3. The system of claim 1, wherein the sensor is a high-precision touch. 4. The system according to claim 1, in which at least two o-rings are installed on the vertical surface of the end locking plate 8 and on the horizontal sealing surface of the steam pipe 4.

Images