CN212476093U - Mechanically locked double-sealing vehicle crane pipe for train tank opening - Google Patents

Abstract

A mechanical locking double-sealing loading arm for a train tank opening is provided, wherein a sealing cover is arranged at the lower end of a gas phase vertical pipe and comprises an annular cover plate capable of covering the tank opening and an inner buckling claw connecting cylinder, an air bag support is arranged on the periphery of the inner buckling claw connecting cylinder, an air bag sealing body is arranged on the outer circumference of the air bag support, and an inner buckling locking sealing body is arranged on the periphery of the lower end face of the cover plate; the outer circumference of the inner buckling claw connecting cylinder is distributed with inner buckling claws hinged with the outer wall of the inner buckling claw connecting cylinder, the inner buckling claw connecting cylinder and the air bag bracket are arranged at intervals, and a piston rod of an air cylinder above the cover plate penetrates through the interval space to be rotatably connected with the middle part of the inner buckling claw; the length of the inner buckling claw is larger than the distance between the inner buckling claw connecting cylinder and the inner wall of the tank opening, so that the inner buckling claw can be driven by the piston rod to lift up to grip the inner wall of the tank opening from bottom to top. The downward traction effect of the inner buckling claw forming the axial seal can ensure that the sealing cover is kept attached to the tank opening without inclining, ensure that the air bag sealing body forming the radial seal is attached to the inner wall of the tank opening, and realize good and stable sealing of the tank opening of the tank car.

Description

Mechanically locked double-sealing vehicle crane pipe for train tank opening

Technical Field

The utility model relates to a loading oil filling riser, specifically speaking are two sealed loading car oil filling riser of train jar mouthful mechanical locking.

Background

The loading arm is a special device in the process of loading and unloading fluid in the petrochemical industry, and is also called a fluid loading and unloading arm. The movable equipment for transferring liquid medium between train, automobile tank car and trestle storage and transportation pipeline is characterized by high safety, flexibility and long service life. The common oil filling riser comprises a liquid phase arm pipe, a liquid phase vertical pipe, a sealing cover and the like. The liquid phase arm pipe is connected with a liquid phase inlet flange pipe and is used for connecting storage equipment such as an oil tank and the like, the liquid phase vertical pipe is used for inserting the oil tank to output liquid, and the sealing cover is placed on the tank opening to seal the tank opening during output. The configured oil gas can not be completely recycled, the configuration is a proper arrangement, and the requirement of environmental protection can not be met at all, the mechanical locking double-sealing oil filling riser top immersion loading adopted for train loading is specified in page 86 of the guidance suggestion on measures for strengthening heavy pollution weather and dealing with tamping emergency emission reduction of the No. 2019648 document of the environmental protection department, according to the requirement, the double-sealing mechanical locking is needed for the loading oil filling riser at the opening of a train tank, two layers of sealing surfaces are required, harmful gas generated in the loading process of harmful chemical substances such as oil products, benzene and the like is completely sealed in the tank car, and the harmful gas is discharged and collected through a gas phase vertical pipe outside a liquid phase vertical pipe. The sealing of the tank opening of the tank car is realized by the double-layer sealing surface of the sealing cover at the lower end of the vertical pipe in the loading process, so the sealing effect of the filling riser and the safety in the loading process are directly influenced by the good and bad sealing performance of the sealing cover.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a train jar mouthful mechanical locking double containment car oil filling riser that sealing performance is good is provided.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a mechanically locked double-sealed loading arm for the tank opening of train is composed of a liquid-phase internal arm tube and a liquid-phase external arm tube connected via a rotary joint of liquid-phase external arm, and a gas phase inner arm pipe and a gas phase outer arm hard pipe which are connected through a gas phase outer arm rotary joint, wherein the rotation axes of the liquid phase outer arm rotary joint and the gas phase outer arm rotary joint are superposed, the liquid phase outer arm pipe is connected with the liquid phase vertical pipe, the gas phase outer arm hard pipe is connected with the gas phase vertical pipe sleeved outside the liquid phase vertical pipe, the lower end of the gas phase vertical pipe is provided with a sealing cover for sealing the tank opening, the sealing cover comprises an annular cover plate capable of covering the tank opening and an inner buckling claw connecting cylinder fixed at the center of the lower end surface of the cover plate, an air bag bracket capable of extending into the tank opening is arranged on the periphery of the inner buckling claw connecting cylinder, an air bag sealing body matched with the inner wall of the tank opening is arranged on the outer circumference of the air bag bracket, and an inner buckle locking sealing body matched with the upper port of the tank opening is arranged on the periphery of the lower end face of the cover plate; the outer circumference of the inner buckling claw connecting cylinder is distributed with inner buckling claws hinged with the outer wall of the inner buckling claw connecting cylinder, the inner buckling claw connecting cylinder and the air bag bracket are arranged at intervals, and a piston rod of an air cylinder arranged above the cover plate penetrates through the interval space to be rotatably connected with the middle part of the inner buckling claw; the length of the inner buckling claw is larger than the distance between the inner buckling claw connecting cylinder and the inner wall of the tank opening, so that the inner buckling claw can be driven by the piston rod to lift up to grip the inner wall of the tank opening from bottom to top.

The piston rod is rotationally connected with the middle part of the inner buckling claw through the inner buckling claw connecting plate.

A high liquid level detection probe extending into the tank mouth is arranged downwards in a penetrating way through an interval space between the inner fastening claw connecting cylinder and the air bag bracket.

The liquid phase vertical pipe and the gas phase vertical pipe are both of telescopic pipe structures, wherein the gas phase vertical pipe is sleeved with a gas phase downward extending pipe which is fixedly connected with the inner buckle claw connecting cylinder and the cover plate.

The liquid phase vertical pipe is sleeved with a liquid phase outer downward extending pipe which can extend downwards, and the liquid phase outer downward extending pipe is connected with a pneumatic lifting mechanism arranged at the top end of the liquid phase vertical pipe through a chain which penetrates through the liquid phase vertical pipe.

The upper end of the liquid phase vertical pipe is provided with a liquid phase vertical pipe upper connecting plate, the liquid phase vertical pipe upper connecting plate is provided with a through hole for the chain to pass through, and the lower end of the liquid phase vertical pipe upper connecting plate is provided with a pressure reducing pipe which is butted with the through hole and extends downwards along the liquid phase vertical pipe.

The inlet end of the liquid phase inner arm pipe is connected with a vertically arranged liquid phase inlet flange pipe through a liquid phase rotary joint, a residual liquid suction pipe penetrates through the liquid phase inner arm pipe, and the inlet end of the residual liquid suction pipe is arranged in the liquid phase inlet flange pipe and is communicated with the inner cavity of the liquid phase inlet flange pipe; the liquid phase inner arm pipe and the liquid phase outer arm pipe are penetrated by the raffinate suction pipe and extend to the lower part of the liquid phase vertical pipe, and the height of the horizontal position of the outlet end of the raffinate suction pipe is lower than that of the inlet end of the raffinate suction pipe.

The horizontal position of the outlet end of the residual liquid suction pipe is higher than the outlet end pipe orifice at the lower part of the liquid phase vertical pipe.

Further, the gas phase outer arm hard pipe and the gas phase inner arm pipe are rigid pipelines, a circulation channel formed by the gas phase inner arm pipe and the gas phase outer arm hard pipe is in a descending trend towards the direction of the gas phase vertical pipe, a gas phase outer arm rotary joint with a rotation center coinciding with an extension line is arranged on the extension line of the rotation axis of the liquid phase outer arm rotary joint, and the gas phase outer arm hard pipe is communicated with the gas phase inner arm pipe through the gas phase outer arm rotary joint. The gas phase inner arm pipe and the gas phase outer arm hard pipe both comprise straight pipe sections which are horizontally arranged or are obliquely downwards arranged towards the direction of the gas phase vertical pipe.

The liquid phase inner arm pipe or the liquid phase outer arm pipe is sleeved with a jacket capable of forming a closed space with the outer wall of the liquid phase inner arm pipe or the liquid phase outer arm pipe, the gas phase outer arm rotary joint is arranged on the jacket and communicated with the inner space of the jacket, and the gas phase outer arm hard pipe is communicated with the gas phase inner arm pipe through the gas phase outer arm rotary joint and the inner space of the jacket.

The jacket is embedded outside the liquid phase inner arm pipe, the gas phase inner arm pipe is fixedly connected and communicated with the jacket, and the gas phase outer arm hard pipe is connected with a gas phase outer arm rotary joint arranged on the jacket.

The liquid phase inner arm pipe comprises a horizontal part and a vertical part connected with the liquid phase outer arm rotary joint, and the clamping sleeve is arranged outside the vertical part or outside the horizontal part.

The gas phase inner arm pipe is fixedly connected with the upper part of the jacket, and the gas phase outer arm rotary joint is arranged below the jacket.

The gas phase outer arm rotary joint comprises two connecting pipes which are nested together, and a rotary sealing element is arranged between the two connecting pipes.

The gas phase inner arm pipe is also connected with a gas phase outlet pipe fixed on the upright post through a gas phase rotary joint.

The liquid phase inner arm pipe is connected with a liquid phase inlet pipe fixed on the upright column through a liquid phase rotary joint, and the gas phase rotary joint and the liquid phase rotary joint are arranged on the same rotary axis.

The utility model has the advantages of firstly: the utility model discloses sealed lid realizes that the twice is sealed, and first way jar mouthful inner chamber gasbag is sealed, and the second way is sealed to be the tight seal of mechanical internal lock above the jar mouth, makes oil gas leakage rate be zero. The double-sealing system is formed by adopting radial sealing formed by an air bag sealing body matched with the inner wall of the tank opening and axial sealing formed by locking the sealing body by an inner buckle matched with the upper port of the tank opening under the downward traction of an inner buckle claw. In the double-sealing system, the sealing cover can be kept attached to the tank opening without inclination under the downward traction action of the inner buckling claw for forming axial sealing, the air bag sealing body for forming radial sealing is further ensured to be well attached to the inner wall of the tank opening, and the good and stable sealing of the tank opening of the tank car can be realized.

The utility model discloses solve on the basis of problem, beneficial effect is secondly: the gas phase inner arm pipe and the gas phase outer arm hard pipe are both rigid pipelines, and the rotation axes of the rotary joints between the gas phase inner arm pipe and the gas phase outer arm hard pipe and between the liquid phase inner arm pipe and the liquid phase outer arm pipe are coaxially arranged, so that mutual interference can be avoided when the rotation angles of the gas phase pipeline and the liquid phase pipeline are respectively changed. The gas-phase inner arm pipe, the gas-phase outer arm hard pipe and the rigid connection mode between the gas-phase inner arm pipe and the gas-phase outer arm hard pipe do not form a drooping U-shaped section in the channel, so that the problem of condensate accumulation is avoided.

The problem of crossing the liquid phase passage and the gas phase passage in the direction is further solved by utilizing the jacket arranged on the liquid phase inner arm pipe or the liquid phase outer arm pipe. Compared with the mode that the two pipelines adopt the bent pipe to detour at the intersection position, the structure mode is easier to determine the position of the pipeline so as to ensure that the liquid-phase outer arm rotary joint and the gas-phase outer arm rotary joint are coaxially arranged. And the mode of fixedly mounting the clamp sleeve and the pipeline in a nested manner is stronger than the structural stability of two independent pipelines, so that the structural stability of the liquid-phase outer arm rotary joint and the gas-phase outer arm rotary joint which are respectively arranged on the pipeline and the clamp sleeve which are nested together is higher, the coaxiality of the liquid-phase outer arm rotary joint and the gas-phase outer arm rotary joint which are influenced by the displacement of the pipeline due to the deformation of a fixing support outside the pipeline and the like is not needed to be worried about, and the stability of the rotary structure of the two channels is ensured.

The utility model has the advantages of three are: a residual liquid suction pipe is arranged in the liquid phase arm pipe and the liquid phase vertical pipe in a penetrating mode, the oil filling riser and the residual liquid suction pipe convey liquid together during loading and unloading, and after loading and unloading are finished and an output valve is closed, the residual liquid suction pipe can form a siphon effect to suck out liquid reserved in the oil filling riser. The structure can automatically realize the discharge of the liquid reserved in the loading and unloading pipe after the loading and unloading are finished, and manual or electronic system control is not needed. The added residual liquid suction pipe does not affect the original structure of the oil filling riser basically, and the added cost is very low, so that the oil filling riser is suitable for popularization and use.

Drawings

Fig. 1 is a schematic structural diagram of the crane pipe of the present invention.

Fig. 2 is a schematic structural view of the sealing cover of the present invention.

FIG. 3 is a schematic view of the arrangement of the residual liquid suction tube of the utility model.

Fig. 4 is a schematic view of the arrangement mode of the pressure reducing pipe in the present invention.

FIG. 5 is a schematic view of the connection of the chain to the liquid phase outer down tube.

The labels in the figure are: 1. a vertical column, 2, a liquid phase inlet flange, 3, a residual liquid suction pipe, 4, a liquid phase rotary joint, 5, an inner arm pneumatic transmission mechanism, 6, a liquid phase tee joint, 7, a gas-liquid baffle plate, 8, a gas phase tee joint, 9, a gas phase rotary joint, 10, a gas phase outlet flange, 11, a gas phase inner arm pipe, 12, a liquid phase inner arm pipe, 13, a jacket, 14, a liquid phase outer arm rotary joint, 15, an outer arm pneumatic transmission mechanism, 16, a gas phase outer arm rotary joint, 17, a gas phase outer arm hard pipe, 18, a liquid phase outer arm pipe, 19, a liquid phase vertical pipe, 20, a liquid phase vertical pipe upper connecting plate, 21, a pneumatic lifting mechanism, 22, a pressure reducing pipe sealing ring, 23, a pressure reducing pipe, 24, a chain arc barrel, 25, a chain, 26, a through hole, 27, a gas phase vertical pipe, 28, a gas phase downward extending pipe, 29, a liquid phase outer downward extending pipe, 30, a liquid phase middle downward extending pipe, 31, a liquid phase inner downward, 33. the device comprises an air bag sealing body, 34, a high liquid level detection probe, 35, a tank opening, 36, a cover plate, 37, an air bag support, 38, a piston rod, 39, an air cylinder, 40, an inner buckling claw connecting plate, 41, an inner buckling claw, 42, an inner buckling claw connecting cylinder, 43, a guide protecting ring, 44, a liquid phase inlet flange pipe, 45, a boss, 46, a pressing plate, 47 and a connecting piece.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings.

As shown in fig. 1, the dual-sealing loading arm for tank mouth of the present invention comprises a liquid phase inner arm pipe 12 and a liquid phase outer arm pipe 18 connected by a liquid phase outer arm rotary joint 14, and a gas phase inner arm pipe 11 and a gas phase outer arm hard pipe 17 connected by a gas phase outer arm rotary joint 16. The rotation axes of the liquid phase outer arm rotary joint 14 and the gas phase outer arm rotary joint 16 are overlapped, so that the liquid phase outer arm pipe 18 and the gas phase outer arm hard pipe 17 can synchronously rotate under the driving of the outer arm pneumatic transmission mechanism 15 to use the position of the tank car. The liquid phase outer arm pipe 18 is connected with the liquid phase vertical pipe 19, and the gas phase outer arm hard pipe 17 is connected with a gas phase vertical pipe 27 sleeved outside the liquid phase vertical pipe. The liquid phase vertical pipe 19 is used for outputting liquid materials into the tank truck, and the gas phase vertical pipe 27 is used for collecting gas formed in the loading process and outputting and collecting the gas through the gas phase outer arm hard pipe 17 and the gas phase inner arm pipe 11.

A sealing cover for sealing the opening of the tank is provided at the lower end of the gas phase vertical pipe 27 to prevent gas from leaking to the outside. As shown in fig. 2, the sealing cover comprises an annular cover plate 36 which can cover the tank opening 35 of the tank car and an inner clamping jaw connecting cylinder 42 which is fixed at the center of the lower end face of the cover plate, wherein the inner clamping jaw connecting cylinder 42 is in butt communication with the gas phase vertical pipe 27. The periphery of the inner fastening claw connecting cylinder 42 is provided with an air bag bracket 37 which can be extended into the tank opening, and the outer circumference of the air bag bracket 37 is provided with an air bag sealing body 33 matched with the inner wall of the tank opening. The airbag sealing body 33 is inflated to seal the opening in the radial direction. The position of the inflation port is set as desired, for example, above the cover plate 36.

The periphery of the lower end face of the cover plate 36 is provided with an inner buckle locking sealing body 32 matched with the upper port of the tank opening, an inner buckle claw 41 hinged with the outer wall of the inner buckle claw connecting cylinder 42 is distributed on the outer circumference of the inner buckle claw connecting cylinder 42, and the inner buckle claw 41 can be driven by a piston rod 38 of an air cylinder 39 to rotate around the hinged point of the inner buckle claw 41. In the embodiment shown in fig. 2, the cylinder 39 is disposed above the cover plate 36, the inner latch connecting cylinder 42 is spaced apart from the airbag support 37, and the piston rod 38 of the cylinder 39 passes through the space to be rotatably connected to the middle of the inner latch 41, for example, by the inner latch connecting plate 40. The length of the inner buckling claw 41 is larger than the distance between the inner buckling claw connecting cylinder 42 and the inner wall of the tank opening, and when the piston rod 38 drives the inner buckling claw 41 to rotate around the hinged point of the inner buckling claw 41 to lift, the inner buckling claw 41 can grip the inner wall of the tank opening from bottom to top. When the inner snap claws 41 exert a gripping force on the inner wall of the can opening from bottom to top, the reaction force acts on the cover plate 36 through the inner snap claw connecting cylinder 42, so that the inner snap locking seal body 32 is tightly pressed on the upper edge of the can opening to seal the can opening from the axial direction.

As shown in fig. 1, a high liquid level detection probe 34 extending into the tank mouth is inserted downwards through the space between the inner snap claw connecting cylinder 42 and the airbag bracket 37 for detecting the liquid level in the tank.

The gas vertical pipe 27 can adopt a telescopic pipe structure, for example, the gas vertical pipe 27 is sleeved with a gas downward extending pipe 31 which can extend downwards, and the gas downward extending pipe 31 and the gas downward extending pipe are in sliding sealing fit. The gas phase downward extending pipe 31 is fixedly connected with the inner clamping claw connecting cylinder 42 and the cover plate 36.

The vertical liquid phase pipe 19 can also be of a telescopic structure, for example, a liquid phase external downward extending pipe 29 is sleeved outside the vertical liquid phase pipe 19, and the liquid phase external downward extending pipe 29 can extend downwards to be inserted into the tank port during loading. The liquid phase vertical pipe 19 may also be a multi-stage casing pipe nested in multiple layers, for example, as shown in fig. 5, a liquid phase middle downward extending pipe 30 and a liquid phase inner downward extending pipe 31 are nested in the liquid phase outer downward extending pipe 29 and the liquid phase vertical pipe 19.

As shown in fig. 1, 4 and 5, the liquid phase down-flow pipe 29 is connected to the pneumatic lifting mechanism 21 provided at the top end of the liquid phase vertical pipe 19 by a chain 25 passing through the liquid phase vertical pipe 19. The connection means can be in the form of a connection piece 47 in the form of a rod or in the form of a plate with flow holes. The liquid phase outer downward extending pipe 29 is controlled to extend downwards or retract upwards through the traction of the chain 25. The upper end of the liquid phase vertical pipe 19 is provided with a liquid phase vertical pipe upper connecting plate 20, the upper end opening of the liquid phase vertical pipe 19 is sealed by the liquid phase vertical pipe upper connecting plate 20, and the liquid phase vertical pipe upper connecting plate 20 is provided with a through hole 26 for the chain 25 to pass through. In order to prevent the conveyed liquid from overflowing upwards from the through hole, the lower end of the liquid phase vertical pipe upper connecting plate 20 is provided with a pressure reducing pipe 23 which is butted with the through hole 26 and extends downwards along the liquid phase vertical pipe 19. The pressure reducing pipe 23 extends from the upper connecting plate 20 of the liquid phase vertical pipe to the lower part of the liquid phase vertical pipe 19, and the orifice position of the liquid entering through hole is moved downwards from the lower end surface of the upper connecting plate 20 of the liquid phase vertical pipe to the lower part of the liquid phase vertical pipe 19 through the pressure reducing pipe. The liquid pressure at the hole is changed from the liquid pressure at the upper connecting plate 20 of the liquid phase vertical pipe to the pressure at the lower part of the liquid phase vertical pipe 19, so the overflow pressure of the liquid is obviously reduced, the overflow path of the liquid which needs to overflow from the through hole must pass through the pressure reducing pipe, the overflow path is obviously increased, the overflow of the liquid can be effectively avoided, and the sealing performance of the oil filling riser is ensured.

As shown in FIG. 4, the pressure reducing pipe 23 can be suspended on the upper connecting plate 20 of the liquid phase vertical pipe, a circle of boss 45 is arranged on the outer wall of the upper port of the pressure reducing pipe 23, the upper end of the pressure reducing pipe 23 is arranged in the through hole 26 in a penetrating way, and the boss 45 is suspended at the through hole of the upper connecting plate 20 of the liquid phase vertical pipe because the diameter of the boss is larger than that of the through hole. A pressure reducing pipe sealing ring 22 is arranged between the lower end surface of the boss 45 at the upper port of the pressure reducing pipe 23 and the upper connecting plate 20 of the liquid phase vertical pipe. In order to keep the connection structure of the depressurization pipe 23 stable and the tightness, a pressing plate 46 can be arranged above the upper connecting plate 20 of the liquid phase vertical pipe, and the pneumatic lifting mechanism 21 is fixed above the upper connecting plate 20 of the liquid phase vertical pipe through the pressing plate 46. The boss at the upper port of the pressure reducing pipe 23 is clamped between the upper connecting plate 20 and the pressing plate 46 of the liquid phase vertical pipe, the pressing plate is fixedly connected with the upper connecting plate of the liquid phase vertical pipe through a bolt, and the boss at the upper port of the pressure reducing pipe 23 is pressed and fixed through the pressing plate 46.

As shown in fig. 3, the inlet end of the liquid phase inner arm pipe 12 is connected with a vertically arranged liquid phase inlet flange pipe 44 through a liquid phase rotary joint 4, a residual liquid suction pipe 3 penetrates through the liquid phase inner arm pipe 12, and the inlet end of the residual liquid suction pipe 3 is arranged in the liquid phase inlet flange pipe 44 and is communicated with the inner cavity of the liquid phase inlet flange pipe; the suction pipe 3 extends to the lower part of the liquid phase vertical pipe 19 through the liquid phase inner arm pipe 12 and the liquid phase outer arm pipe 18, and the height of the horizontal position of the outlet end of the suction pipe 3 is lower than that of the inlet end thereof. During loading, liquid is drawn into the liquid phase inlet flange pipe 44 and the liquid phase inner arm pipe 12, and is also drawn into the raffinate suction pipe 3. At this time, the liquid is transported by the loading arm and the residual liquid suction tube inside. After the valve at the inlet end of the liquid-phase inlet flange pipe 44 is closed after loading is finished, the residual liquid suction pipe 3 can completely pump out the liquid retained in the liquid-phase inlet flange pipe 44 through the siphoning effect, so that the liquid retained in the oil filling riser is prevented from leaking or blocking the oil filling riser due to liquid condensation. The horizontal position of the outlet end of the residual liquid suction pipe 3 is higher than the outlet end pipe orifice at the lower part of the liquid phase vertical pipe 19.

As shown in figure 1, a jacket 13 capable of forming a closed space between the liquid phase inner arm pipe 12 and the outer wall thereof is sleeved on the liquid phase inner arm pipe, a gas phase outer arm rotary joint 16 is arranged on the jacket 13 and communicated with the inner space of the jacket, and a gas phase outer arm hard pipe 17 is communicated with the gas phase inner arm pipe 11 through the gas phase outer arm rotary joint 16 and the inner space of the jacket 13. In this kind of structure, gaseous phase outer arm hard tube and gaseous phase inner arm pipe be the rigid conduit, the circulation passageway that gaseous phase inner arm pipe and gaseous phase outer arm hard tube formed is the decline trend towards gaseous phase vertical tube direction, gaseous phase inner arm pipe and gaseous phase outer arm hard tube all include the straight tube section that the level set up or incline the downward sloping towards gaseous phase vertical tube direction and set up, the middle part is flagging to form the U-shaped section and is deposited up the condensate liquid when can avoiding adopting the hose. The jacket solves the crossing problem of the liquid phase passage and the gas phase passage in the trend. This configuration makes it easier to locate the pipe than if the two pipes were to be bent around at the intersection to ensure that the liquid phase outer arm swivel joint 14 and the gas phase outer arm swivel joint 16 are coaxially located. And the mode of fixedly mounting the jacket and the pipeline in a nested manner is stronger than the structural stability of two independent pipelines, so that the structural stability of the liquid-phase outer arm rotary joint 14 and the gas-phase outer arm rotary joint 16 which are respectively arranged on the pipeline and the jacket which are nested together is higher, the coaxiality of the liquid-phase outer arm rotary joint 14 and the gas-phase outer arm rotary joint 16 is not influenced by the displacement of the pipeline due to the deformation of a fixed bracket outside the pipeline and the like, and the stability of the rotary structure of the two channels is ensured.

The liquid phase inner arm pipe 12 comprises a horizontal part and a vertical part connected with a liquid phase outer arm rotary joint 14, and the jacket 13 is preferably arranged outside the vertical part. Because the liquid phase outer arm rotary joint 14 is connected to the vertical part of the liquid phase inner arm pipe 12, and the gas phase outer arm rotary joint 16 is arranged at the lower end of the jacket 13, the liquid phase outer arm rotary joint 14 and the gas phase outer arm rotary joint 16 can be conveniently positioned to be concentric, for example, a section of pipeline can be concentrically fixed outside the vertical part of the liquid phase inner arm pipe 12, the upper end of the pipeline is closed, and the gas phase outer arm rotary joint 16 is concentrically arranged at the lower end of the pipeline. In addition, in the structure, the connection structure of the gas-phase inner arm pipe 11 and the jacket 13 is relatively simple, and as shown in fig. 1, the gas-phase inner arm pipe 11 can be directly connected with the jacket after being horizontally extended without an elbow.

The jacket 13 may be disposed outside the liquid phase outer arm pipe 18, in which case the gas phase inner arm pipe 11 is connected to a gas phase outer arm rotary joint 16 disposed on the jacket 13, and the gas phase outer arm hard pipe 17 is fixedly connected to the jacket 13 and communicates with the gas phase inner arm pipe 11 through the inner space of the jacket 13 and the gas phase outer arm rotary joint 16.

The gas phase outer arm rotary joint comprises two connecting pipes which are nested together, and a rotary sealing element is arranged between the two connecting pipes. The gas phase inner arm pipe is also connected with a gas phase outlet pipe fixed on the upright post through a gas phase rotary joint. The liquid phase inner arm pipe is connected with a liquid phase inlet pipe fixed on the upright column through a liquid phase rotary joint, and the gas phase rotary joint and the liquid phase rotary joint are arranged on the same rotary axis.

Claims (10)

1. The utility model provides a train jar mouthful mechanical locking double containment car oil filling riser, includes arm pipe (12) and the outer arm pipe (18) of liquid phase in connecting through liquid phase outer arm rotary joint (14) to and the outer arm hard tube (17) of gaseous phase in arm pipe (11) and the outer arm hard tube of gaseous phase (17) that connect through gaseous phase outer arm rotary joint (16), the axis of rotation coincidence of liquid phase outer arm rotary joint (14) and the outer arm rotary joint of gaseous phase (16), liquid phase outer arm pipe (18) be connected with liquid phase vertical pipe (19), gaseous phase outer arm hard tube (17) are connected with the outer gas phase vertical pipe (27) of establishing of liquid phase vertical pipe overcoat, gaseous phase vertical pipe (27) lower extreme is equipped with the sealed lid that is used for sealing the jar mouth, its characterized in that: the sealing cover comprises an annular cover plate (36) capable of covering the tank opening (35) and an inner buckling claw connecting cylinder (42) fixed at the center of the lower end face of the cover plate, an air bag support (37) capable of extending into the tank opening is arranged on the periphery of the inner buckling claw connecting cylinder (42), an air bag sealing body (33) matched with the inner wall of the tank opening is arranged on the outer circumference of the air bag support (37), and an inner buckling locking sealing body (32) matched with the upper end port of the tank opening is arranged on the periphery of the lower end face of the cover plate (36); inner buckling claws (41) hinged with the outer wall of the inner buckling claw connecting cylinder (42) are distributed on the outer circumference of the inner buckling claw connecting cylinder (42), the inner buckling claw connecting cylinder (42) and the air bag support (37) are arranged at intervals, and a piston rod (38) of an air cylinder (39) arranged above the cover plate (36) penetrates through the interval space to be rotatably connected with the middle parts of the inner buckling claws (41); the length of the inner buckling claw (41) is larger than the distance between the inner buckling claw connecting cylinder (42) and the inner wall of the tank opening, so that the inner buckling claw (41) can be driven by the piston rod (38) to lift up to grip the inner wall of the tank opening from bottom to top.

2. The mechanical locking double-sealing vehicle loading arm for the train tank opening as claimed in claim 1, wherein: the piston rod (38) is rotatably connected with the middle part of the inner buckling claw (41) through an inner buckling claw connecting plate (40).

3. The mechanical locking double-sealing vehicle loading arm for the train tank opening as claimed in claim 1, wherein: a high liquid level detection probe (34) extending into the tank mouth is arranged downwards through a spacing space between the inner fastening claw connecting cylinder (42) and the air bag bracket (37).

4. The mechanical locking double-sealing vehicle loading arm for the train tank opening as claimed in claim 1, wherein: the liquid phase vertical pipe (19) and the gas phase vertical pipe (27) are both of telescopic sleeve structures, wherein the gas phase downward extending pipe (31) sleeved by the gas phase vertical pipe (27) is fixedly connected with the inner clamping claw connecting cylinder (42) and the cover plate (36).

5. The mechanical locking double-sealing vehicle loading arm for the train tank opening as claimed in claim 4, wherein: the liquid phase vertical pipe (19) is sleeved with a liquid phase external downward extending pipe (29) which can extend downwards, and the liquid phase external downward extending pipe (29) is connected with a pneumatic lifting mechanism (21) arranged at the top end of the liquid phase vertical pipe (19) through a chain (25) passing through the liquid phase vertical pipe (19).

6. The mechanical locking double-sealing vehicle loading arm for the train tank opening as claimed in claim 5, wherein: the upper end of the liquid phase vertical pipe (19) is provided with a liquid phase vertical pipe upper connecting plate (20), the liquid phase vertical pipe upper connecting plate (20) is provided with a through hole (26) for the chain (25) to pass through, and the lower end of the liquid phase vertical pipe upper connecting plate (20) is provided with a pressure reducing pipe (23) which is butted with the through hole (26) and extends downwards along the liquid phase vertical pipe (19).

7. The mechanical locking double-sealing vehicle loading arm for the train tank opening as claimed in claim 1, wherein: the inlet end of the liquid phase inner arm pipe (12) is connected with a vertically arranged liquid phase inlet flange pipe (44) through a liquid phase rotary joint (4), a residual liquid suction pipe (3) penetrates through the liquid phase inner arm pipe (12), and the inlet end of the residual liquid suction pipe (3) is arranged in the liquid phase inlet flange pipe (44) and communicated with the inner cavity of the liquid phase inlet flange pipe; the residual liquid suction pipe (3) penetrates through the liquid phase inner arm pipe (12) and the liquid phase outer arm pipe (18) to extend to the lower part of the liquid phase vertical pipe (19), and the height of the horizontal position of the outlet end of the residual liquid suction pipe (3) is lower than that of the inlet end of the residual liquid suction pipe.

8. The mechanical locking double-sealing vehicle loading arm for the train tank opening as claimed in claim 7, wherein: the horizontal position of the outlet end of the residual liquid suction pipe (3) is higher than the outlet end pipe orifice at the lower part of the liquid phase vertical pipe (19).

9. The mechanical locking double-sealing vehicle loading arm for the train tank opening as claimed in claim 1, wherein: the liquid phase inner arm pipe (12) is sleeved with a jacket (13) capable of forming a closed space with the outer wall of the liquid phase inner arm pipe, the gas phase outer arm rotary joint (16) is arranged on the jacket (13) and communicated with the inner space of the jacket, and the gas phase outer arm hard pipe (17) is communicated with the gas phase inner arm pipe (11) through the gas phase outer arm rotary joint (16) and the inner space of the jacket (13).

10. The mechanical locking double-sealing vehicle loading arm for the train tank opening as claimed in claim 9, wherein: the liquid phase inner arm pipe (12) comprises a horizontal part and a vertical part connected with a liquid phase outer arm rotary joint (14), and the jacket (13) is arranged outside the vertical part.

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