CN111453689A - Anti-condensation device for loading arm - Google Patents

Abstract

The invention discloses an anti-condensation device for a loading arm, which comprises an inner tube, a sleeve, a lifting piece and an air source, wherein the inner tube is connected with the loading arm, the sleeve and the lifting piece are sleeved on the inner tube, the lifting piece is positioned in the sleeve, the lifting piece is respectively connected with the sleeve and the inner tube in a sliding manner, a liquid inlet and a liquid outlet are formed in the inner tube, the liquid inlet and the liquid outlet are positioned in the sleeve and below the lifting piece, the air source is detachably connected with the loading arm through a quick connector, the air source is arranged at one end, far away from the inner tube, of the loading arm, the top of the sleeve is provided with an air vent, and the sleeve is. By using the anti-condensation device, the leakage of liquid medium in the oil filling riser and the damage of the joint part are avoided, the pressure build-up caused by the condensation of the medium in the oil filling riser is avoided, and the safety of chemical product transportation is improved; when in use, the anti-condensation device is directly connected with the oil filling riser, the original shape of the oil filling riser is not required to be changed, a heat tracing device is not required to be added to the oil filling riser, and the use is convenient and fast.

Description

Anti-condensation device for loading arm

Technical Field

The invention relates to the field of petrochemical product transportation, in particular to an anti-condensation device for a loading arm.

Background

The loading arm is a special device in the process of loading and unloading liquid in the petrochemical industry, and is also called a liquid loading and unloading arm. The oil filling riser is connected with the rigid pipeline and the elbow by adopting a rotary joint so as to realize movable equipment for transmitting liquid media between trains, automobile tank cars and trestle storage and transportation pipelines, so as to replace the old hose connection, and the oil filling riser has the characteristics of high safety, flexibility, long service life and the like. The crane pipe mainly comprises mechanisms of fixing, rotating, operating, balancing and the like and an oil pipe.

However, in chemical products, the condensation point of part of the products is high, and heat tracing needs to be added in the transportation process to keep the liquid state of the chemical products, and the heat tracing device is coated or wound on the whole crane pipe. Because the oil filling riser has multiunit activity elbow, multiple motion forms such as rotation, activity from top to bottom need to take place when the counterpoint loading, and the counterpoint action of oil filling riser in addition should rely on field operation personnel to operate with external force, and the thick heat preservation device of oil filling riser outside makes the operation heavy, loaded down with trivial details. Moreover, due to the appearance of the crane pipe, the failure rate of the heat tracing pipeline on the movable part is correspondingly improved in the movement process.

In addition, after loading is finished, when the inlet and the outlet are closed and heat tracing is closed, the temperature in the crane pipe is still continuously raised, so that the volume of liquid in the crane pipe is expanded, the liquid in the crane pipe is leaked, and even the joint part is damaged.

Moreover, when the existing oil filling riser is used for transporting easily-condensed liquid, the liquid is easily condensed into solid inside the oil filling riser, so that the pressure building risk is caused due to the fact that the pipeline is not communicated, and the safety is greatly reduced.

Therefore, in view of the above problems that the heat tracing pipeline is prone to malfunction during the transportation process of chemical products, liquid in the oil filling riser is prone to leakage after loading is finished, products prone to condensation are prone to condensation in the oil filling riser to cause pressure build-up, and the like, how to efficiently and safely transport the chemical products prone to condensation becomes one of the problems which are focused in the field and need to be solved urgently.

Disclosure of Invention

In order to solve the problems that the heat tracing pipeline is easy to break down in the transportation process of the existing chemical products, liquid in the oil filling riser is easy to leak after loading is finished, and products easy to condense are easy to condense in the oil filling riser to cause pressure building and the like, the invention innovatively provides a condensation preventing device for the loading oil filling riser, which is connected with the loading oil filling riser, after loading is finished, the residual liquid medium in the oil filling riser is blown into a sleeve outside an inner pipe through gas, the liquid is subjected to heat preservation or cold preservation in the sleeve, the medium is prevented from condensing in the oil filling riser to cause pressure building, and the safety of chemical product transportation is improved; when loading again, press the liquid in the sleeve back to inside the inner tube, make in the liquid medium flows into the car again, need not to carry out the companion heat to the oil filling riser again, only need utilize the temperature of the liquid medium in the inner tube when the loading can melt the solid medium in the sleeve into liquid medium, need not to increase the companion heat facility to the oil filling riser.

In order to achieve the technical purpose, the invention discloses an anti-condensation device for a loading arm, which comprises: inner tube, sleeve, lift spare and air supply, the inner tube is connected with the oil filling riser, the sleeve with lift spare cover is established on the inner tube, lift spare is located telescopic inside, lift spare respectively with the sleeve with inner tube sliding connection, seted up liquid on the inner tube and imported and exported, liquid is imported and exported and is located the sleeve is inside and is located the below of lift spare, the air supply passes through quick-operation joint with the oil filling riser and can dismantle the connection, the air supply sets up the oil filling riser is kept away from the one end of inner tube, telescopic top is equipped with the interface of ventilating, the sleeve passes through the interface of ventilating with the air supply intercommunication.

Furthermore, the anti-condensation device also comprises a pneumatic valve, the pneumatic valve is arranged on the pipe body of the crane pipe close to the quick connector, and the ventilation interface is connected with the pneumatic valve through a ventilation pipe.

Further, the lifting piece is a piston or an air bag.

Further, a sealing ring is arranged between the lifting piece and the inner wall of the sleeve.

Further, a heat tracing insulation layer is sleeved outside the sleeve.

The invention also discloses an anti-condensation device for the loading arm, which comprises: inner tube, sleeve, lift piece, air supply and be used for pushing down the elastic component of lift piece, the inner tube is connected with the oil filling riser, the sleeve with lift piece cover is established on the inner tube, the lift piece is located telescopic inside, the lift piece respectively with the sleeve with inner tube sliding connection, liquid inlet and outlet has been seted up on the inner tube, liquid inlet and outlet is located the sleeve is inside and is located the below of lift piece, the air supply passes through quick-operation joint with the oil filling riser and can dismantle the connection, the air supply sets up the oil filling riser is kept away from the one end of inner tube, the elastic component sets up the top of lift piece, the through-hole has been seted up at telescopic top.

Furthermore, the elastic part is a spring, and two ends of the spring respectively abut against the sleeve and the lifting part.

Further, the lifting piece is a piston or an air bag.

Further, a sealing ring is arranged between the lifting piece and the inner wall of the sleeve.

Further, a heat tracing insulation layer is sleeved outside the sleeve.

The invention has the beneficial effects that:

(1) the condensation-preventing device for the loading crane pipe is connected with the loading crane pipe, after loading is finished, the residual liquid medium in the crane pipe is blown into the sleeve outside the inner pipe through the gas provided by the gas source, and the liquid is subjected to heat preservation or cold preservation in the sleeve, so that the easily-condensed medium is not condensed, the leakage of the liquid medium in the crane pipe and the damage of a joint part are avoided, the condensation of the easily-condensed medium in the crane pipe is avoided, the pressure build-up caused by the condensation of the easily-condensed medium is avoided, and the transportation safety of chemical products is improved.

(2) When the anti-condensation device for the loading crane pipe is used, when the loading crane pipe is loaded again, the medium in the sleeve is pressed back to the inner pipe, so that the liquid medium flows into the vehicle again; in the process, the heat tracing of the oil filling riser is not needed, the solid medium in the sleeve can be melted into the liquid medium only by utilizing the temperature of the liquid medium in the inner tube during loading, and the liquid medium is pressed back to the inner part of the inner tube. The anti-condensation device of the invention does not need to add a heat tracing device to the oil filling riser, and is convenient and rapid to use.

(3) The anti-condensation device for the loading crane pipe is directly connected with the crane pipe when in use, the original shape of the crane pipe is not required to be changed, the structure is simple, the installation period is short, the replacement is convenient, and the transportation cost of chemical products is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an anti-condensation device for a loading arm.

Fig. 2 is a schematic structural view of an anti-condensation device for a loading arm according to another embodiment.

In the figure, the position of the upper end of the main shaft,

1. an inner tube; 2. a sleeve; 3. a lifting member; 4. a gas source; 5. a pneumatic valve; 6. a liquid inlet and outlet; 7. a breather pipe; 8. a vent interface; 9. a through hole; 10. an elastic member; 11. a seal ring; 12. a heat tracing insulation layer; 13. a loading arm; 14. a flange; 15. a control valve; 16. a quick coupling.

Detailed Description

The invention provides an anti-condensation device for a loading arm, which is explained and explained in detail in the following with the attached drawings of the specification.

As shown in fig. 1, this embodiment specifically discloses a prevent device that condenses for loading arm, including inner tube 1, sleeve 2, lifter 3 and air supply 4, inner tube 1 is connected with arm 13, sleeve 2 and 3 covers of lifter are established on inner tube 1, lifter 3 is located sleeve 2's inside, lifter 3 respectively with sleeve 2 and inner tube 1 sliding connection, liquid import and export 6 has been seted up on inner tube 1, liquid import and export 6 is located sleeve 2 inside and is located the below of lifter 3, air supply 4 can be dismantled with arm 13 through quick-operation joint 16 and be connected, air supply 4 sets up the one end of keeping away from inner tube 1 at arm 13, sleeve 2's top is equipped with the interface 8 of ventilating, sleeve 2 is through ventilating interface 8 and air supply 4 intercommunication.

The inner pipe 1 is connected between a loading arm 13 and a control valve 15, the upper part of the inner pipe 1 is connected with the loading arm 13 through a flange 14, and the lower part of the inner pipe 1 is connected with a pipe body where the control valve 15 is positioned through a flange.

The anti-condensation device further comprises a pneumatic valve 5, the pneumatic valve 5 is arranged on the pipe body of the crane pipe close to the quick connector 16, and the ventilation interface 8 is connected with the pneumatic valve 5 through a ventilation pipe 7. The vent pipe 7 is a metal hose, and during use, the vent pipe 7 moves along with the crane pipe 13, and preferably, the vent pipe 7 is wound on the crane pipe.

After loading is finished, the control valve 15 below the inner pipe 1 is closed, and the switch on the quick connector 16 at the other end of the oil filling riser 13 is also in a closed state; the quick connector is an API (application programming interface), when the quick connector 16 is connected to a docking pile, the quick connector 16 is opened, the pneumatic valve 5 is opened, the passage of the quick connector 16 and the gas source 4 is communicated, gas in the gas source 4 on the docking pile is introduced into the oil filling riser 13, the gas provided by the gas source 4 pushes the medium in the oil filling riser 13 into the sleeve 2 through the liquid inlet and outlet 6 of the inner pipe 1, the lifting piece 3 is pushed to move upwards under the pressure action of the liquid medium, the medium is temporarily stored in the sleeve 2, no residual liquid medium is contained in the oil filling riser 13, and even if the residual liquid medium is condensed, the liquid with temperature can melt the residual liquid medium in the later loading process, so that the residual liquid medium enters the vehicle and cannot be condensed to block the oil filling pipe flow passage.

When loading is carried out again, a switch on the quick connector 16 is closed, the quick connector 16 is in butt joint with a joint of a vehicle to be loaded, the switch on the quick connector 16 and the pneumatic valve 5 are opened, gas in the gas source 4 enters the upper cavity of the sleeve 2 through the vent pipe 7, the gas provides pressure to push the lifting piece 3 to move downwards, force is transmitted to a medium in the lower cavity of the sleeve 2 through the lifting piece 3, and the medium at the moment is possible to be liquid or condensed and solid; if the medium is in a liquid state, the air pressure pushes the lifting piece 3 to move downwards, and the liquid medium is pushed to return to the inner part of the oil filling riser 13 along the liquid inlet and outlet 6 and is loaded into the vehicle; if the medium is solid, the liquid which is heated by the previous stage and flows in the oil filling riser 13 continuously transfers heat to the medium in the sleeve 2 through the inner pipe 1, because the flow rate is controlled during loading, the loading process is generally carried out for more than half an hour, the solid medium in the sleeve 2 is melted in the time, and the melted liquid medium flows into the vehicle through the oil filling riser again.

By adopting the condensation preventing device, the heat tracing of the oil filling riser 13 is not needed, the volume is reduced, the energy consumption is reduced, even external energy is not needed, the medium in the sleeve is heated by transferring heat through the inner pipe 1, and the cost is reduced.

In another embodiment, as shown in fig. 2, the lifting device includes an inner tube 1, a sleeve 2, a lifting member 3, an air source 4 and an elastic member 10 for pressing down the lifting member 3, the inner tube 1 is connected to a loading arm 13, the sleeve 2 and the lifting member 3 are sleeved on the inner tube 1, the lifting member 3 is located inside the sleeve 2, the lifting member 3 is respectively connected to the sleeve 2 and the inner tube 1 in a sliding manner, a liquid inlet and outlet 6 is formed in the inner tube 1, the liquid inlet and outlet 6 is located inside the sleeve 2 and below the lifting member 3, the air source 4 is detachably connected to the loading arm 13 through a quick coupling 16, the air source 4 is arranged at one end of the loading arm 13 far away from the inner tube 1, the elastic member 10 is arranged above the lifting member 3, and a through hole.

The elastic member 10 is a spring, and two ends of the spring respectively abut against the sleeve 2 and the lifting member 3.

After loading is finished, the control valve 15 below the inner pipe 1 is closed, and the switch on the quick connector 16 at the other end of the oil filling riser 13 is also in a closed state; when the quick connector 16 is connected to a docking pile, the quick connector 16 is opened, the passage of the quick connector 16 and the gas source 4 is communicated, the gas in the gas source 4 on the docking pile is introduced into the oil filling riser 13, the medium in the oil filling riser 13 is pushed into the sleeve 2 through the liquid inlet and outlet 6 of the inner pipe 1 by the gas provided by the gas source 4, the lifting piece 3 is pushed to move upwards under the pressure of the liquid medium, and the medium is temporarily stored in the sleeve 2; when the lifting piece 3 rises, the spring above the lifting piece 3 is compressed, and the compressed air in the upper cavity of the sleeve 2 is discharged through the through hole 9 at the top of the sleeve.

When loading is carried out again, the switch on the quick connector 16 is closed, the quick connector 16 is in butt joint with the joint of the vehicle to be loaded, the restoring elasticity of the spring provides pressure to push the lifting piece 3 to move downwards, and the liquid medium is pushed to return to the interior of the oil filling riser 13 along the liquid inlet and outlet 6 again to be loaded into the vehicle.

The lifting piece 3 is a piston or an air bag, and the lifting piece 3 is connected with the inner tube 1 and the sleeve 2 in a sliding way and does lifting movement in the sleeve.

Be provided with sealing washer 11 between lifter 3 and the sleeve 2 inner wall, guarantee that the gas between the upper and lower two parts of lifter 3 is isolated in sleeve 2, provide pressure better, promote lifter 3 and carry out elevating movement.

The heat tracing insulation layer 12 is sleeved outside the sleeve 2, so that the medium inside the sleeve 2 can be ensured to be in a liquid state and not to be condensed.

The inner pipe 1 is connected with the oil filling riser 13 through a flange 14, and the inner pipe 1 is also connected with a pipe below the inner pipe through the flange 14, so that the anti-condensation device is convenient to disassemble, assemble, replace and maintain.

In the present invention, the gas provided by the gas source 4 is nitrogen, and other inert gases can be used.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "the present embodiment," "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and simplifications made in the spirit of the present invention are intended to be included in the scope of the present invention.

Claims (10)

1. An anti-coagulation device for a loading arm, comprising: an inner tube (1), a sleeve (2), a lifting piece (3) and an air source (4), the inner tube (1) is connected with a crane tube (13), the sleeve (2) and the lifting piece (3) are sleeved on the inner tube (1), the lifting piece (3) is positioned in the sleeve (2), the lifting piece (3) is respectively connected with the sleeve (2) and the inner tube (1) in a sliding way, a liquid inlet and outlet (6) is formed in the inner pipe (1), the liquid inlet and outlet (6) is positioned in the sleeve (2) and below the lifting piece (3), the air source (4) is detachably connected with the crane pipe (13) through a quick joint (16), the air source (4) is arranged at one end of the crane pipe (13) far away from the inner pipe (1), the top of the sleeve (2) is provided with a ventilation interface (8), and the sleeve (2) is communicated with the air source (4) through the ventilation interface (8).

2. The device according to claim 1, characterized in that it further comprises a pneumatic valve (5), said pneumatic valve (5) being arranged on the body of the loading arm close to said quick coupling (16), said venting interface (8) being connected to said pneumatic valve (5) by a venting tube (7).

3. The anti-condensation device for loading arms according to claim 1 or 2, characterized in that said lifting member (3) is a piston or an air-bag.

4. The device according to claim 1, characterized in that a sealing ring (11) is arranged between the lifting member (3) and the inner wall of the sleeve (2).

5. The anti-condensation device for loading arm according to claim 1, characterized in that the sleeve (2) is externally sheathed with a heat tracing insulation layer (12).

6. An anti-coagulation device for a loading arm, comprising: inner tube (1), sleeve (2), lifting member (3), air supply (4) and be used for pushing down elastic component (10) of lifting member (3), inner tube (1) is connected with oil filling riser (13), sleeve (2) with lifting member (3) cover is established on inner tube (1), lifting member (3) are located the inside of sleeve (2), lifting member (3) respectively with sleeve (2) with inner tube (1) sliding connection, seted up liquid import and export (6) on inner tube (1), liquid import and export (6) are located sleeve (2) are inside and are located the below of lifting member (3), air supply (4) can be dismantled through quick-operation joint (16) with oil filling riser (13) and be connected, air supply (4) set up the one end that inner tube (1) was kept away from in oil filling riser (13), elastic component (10) set up the top of lifting member (3), the top of the sleeve (2) is provided with a through hole (9).

7. The device according to claim 6, characterized in that said elastic element (10) is a spring, the two ends of which bear against said sleeve (2) and said lifting element (3), respectively.

8. The device according to claim 6, characterized in that said lifting member (3) is a piston or an air-bag.

9. The device according to claim 6, characterized in that a sealing ring (11) is arranged between the lifting member (3) and the inner wall of the sleeve (2).

10. The device for preventing the coagulation of the loading arm according to claim 6, characterized in that the sleeve (2) is externally sheathed with a heat tracing insulation layer (12).

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