Closed connecting device between storage tank and vehicle tank

Abstract

The utility model relates to a closed connecting device between a storage tank and a vehicle tank. A cylinder barrel with a closed upper end in the device is fixed at the front end of a crane pipe, a telescopic pipe is arranged in the cylinder barrel, and the cylinder barrel is sequentially connected with a connecting short section, an oil guide pipe, a quick connector and a tail pipe through the telescopic pipe, an exhaust port capable of conveying gas through a pipeline is formed in a vehicle tank sealing connector in sealing contact with a vehicle tank opening. Pipe bodies of the telescopic pipes are connected through key grooves, and sealing pieces are arranged between the telescopic pipes and between the telescopic pipes and the cylinder barrel. And a lifting winch fixed on the crane pipe is connected with the lower pipe body of the telescopic pipe through a suspension cable. According to the device, gas emitted in the loading and unloading process is led into a storage tank or a safe place through the exhaust port and the pipeline, dangerous sources can be eliminated, safe production is ensured, and environmental pollution is prevented. The device is simple in structure, convenient to operate, time-saving and labor-saving, and the length of the loading and unloading pipeline is adjusted by the lifting winch.

Description

Technical Field

[0001] This utility model relates to a connection device between a storage tank and a tank truck opening, specifically a sealed connection device between a storage tank and a tank truck. Background Technology

[0002] Currently, transporting crude oil from some remote wells and single wells in oilfields via pipelines would be too costly. The usual practice is to store the extracted crude oil in storage tanks at the well site and then transport it by tanker trucks. Before the tanker trucks arrive at the designated location and the storage tanks begin unloading, the tanker truck's opening must be aligned with the unloading arm of the storage tank. The most common method for connecting the unloading arm of the storage tank to the tanker truck's opening is as follows:

[0003] Workers boarded the oil tanker and connected the unloading pipe to the unloading arm. The unloading pipe had to extend into the bottom of the oil tanker to achieve submersion loading. Then, the workers opened the unloading gate of the storage tank and kept a close eye on the liquid level changes inside the tanker during the loading process.

[0004] To check the liquid level changes inside the tanker truck, workers need to climb onto the truck and manually measure the changes at the observation port. After loading is complete, the unloading gate of the storage tank must be closed first, and then workers need to climb onto the truck to remove the unloading arm. Workers need to climb to heights multiple times to complete one unloading and loading process.

[0005] Currently, there are various types of connection devices for loading and unloading crude oil from single-well oil tankers. Commonly used ones include: 1. Straight pipe connection: A straight pipe is placed in the tanker of a tanker truck to load oil. This method is the most widely used, but it cannot meet the safety requirement that the lower end of the straight pipe be 20cm away from the bottom of the tanker truck during loading and unloading. It also needs to be kept in the tanker truck at all times, making it prone to collisions; 2. Retractable straight pipe connection: Because it consists of multiple retractable straight pipes, it is quite heavy. When connecting the tanker truck for loading oil, the operation time on top of the tanker truck is long, and the operation risk is relatively high; 3. Universal joint connection: Its manufacturing cost is relatively high.

[0006] The connection devices between the aforementioned single-well storage tanks and oil tank trucks are not in a sealed state during the loading and unloading of crude oil into the tanks, which can easily cause leakage of crude oil and mixed volatile gases. Furthermore, after the storage tank pipelines are filled with crude oil, there is a dripping phenomenon, posing safety and environmental hazards.

[0007] To solve the above problems, the on-site staff did a lot of work, and after searching, the following relevant patent technologies have been found:

[0008] Patent application publication number CN117902540A discloses a sealed oil loading device for an oil tanker. The device includes: an elevated oil storage tank, a tanker body, a main oil pipeline, and a main gas pipeline. The oil loading port on the top of the tanker body is sealed with a sealing cap, and the sealing cap is respectively connected to an internal oil pipeline and an internal gas pipeline leading to the inside of the tanker body. The oil outlet and air inlet of the elevated oil storage tank are respectively connected to the main oil pipeline and the main gas pipeline. The main oil pipeline is connected to the internal oil pipeline through an oil explosion-proof hose. The main gas pipeline is connected to the internal gas pipeline through an air explosion-proof hose.

[0009] The invention adds a natural gas balance pipeline between the oil storage tank and the tank truck body, and sets a sealed cap at the oil loading port of the tank truck body, which effectively solves the problem of sealing the crude oil at the oil loading point, significantly reduces oil and gas loss during the oil loading process, reduces environmental pollution, and achieves "zero pollution" in the oil loading process.

[0010] However, the internal oil pipeline is a straight pipe, connected to the tank opening via a quick connector. The operation of placing and removing the straight internal oil pipeline from the top of the tanker is inconvenient, and there is a risk of crude oil dripping and environmental pollution after removal. Furthermore, the daily storage of the straight internal oil pipeline is also quite inconvenient.

[0011] The patent authorization announcement number CN208499305U discloses an automatic oil unloading device for elevated oil storage tanks, including an loading arm, an electromagnetic unloading valve installed in the body of the loading arm, an oil outlet of the loading arm connected to a telescopic pipe, a float installed in the lower end of the telescopic pipe, a fixed pulley installed above the loading arm, a wire rope whose front end is connected to the float in the lower end of the telescopic pipe and then passes through the fixed pulley, and whose rear end is wound in the winch, and the electromagnetic unloading valve is connected to a controller via a cable.

[0012] However, the following defects still exist: the connection and fixation between the pulley and the tank involves tank modification and hot work, which poses safety hazards and does not meet the "three-fold and three-zero" requirements of the production site; moreover, it cannot achieve fully sealed loading and unloading of crude oil.

[0013] Patent application publication number CN116409745A discloses an oil loading arm, an oil storage tank, an oil loading system, and their applications. The oil loading arm in this invention may include: an loading arm body, a cover plate, a movable inner tube, an oil cleaning component, and a drive component. The side wall of the loading arm body is provided with an oil inlet for connecting an external oil pipe, and an opening is provided at the bottom. The cover plate is connected to the bottom of the loading arm body. The movable inner tube and the oil cleaning component are located in the hollow structure of the loading arm body. The drive component is installed on the outer wall of the loading arm body and is connected to the movable inner tube. The oil scraping component of the oil cleaning component is nested in the upper part of the movable inner tube. Under the drive of the drive component, the movable inner tube extends and retracts at the opening and the oil scraping component slides within the loading arm body.

[0014] However, the following defects still exist: the above-mentioned device has a complex structure and high cost, making it unsuitable for front-line production and operation requirements; the device is designed so that the loading arm is submerged 20cm into the tank opening during the oil loading process, but its pipe length does not meet the safety requirement that the distance from the lower pipe opening to the bottom of the tank be less than 20cm. Furthermore, it cannot achieve a completely sealed process during crude oil loading and unloading.

[0015] Patent publication number CN216105984U discloses a novel hydraulically driven loading arm, comprising a column, a connecting plate fixed in the middle of the column, a straight pipe rotatably connected to the connecting plate via a bearing, a U-shaped pipe connected to the upper end of the straight pipe, and a bent pipe connected to the other end of the U-shaped pipe. The bent pipe is rotatably connected to a steering pipe via a rotary joint. This utility model, by setting a rotation mechanism and a limiting mechanism, utilizes a servo motor to drive the straight pipe to rotate, thereby enabling left and right arm rotation. The limiting mechanism maintains the balance of the loading arm during left and right arm rotation, reducing the probability of the loading arm tipping over. The corrugated hose connected to the insertion pipe facilitates adjustment of the insertion angle. The arc-shaped baffle prevents the corrugated hose from being inserted into the oil tank, thus preventing oil vapor from adhering to the surface of the corrugated hose.

[0016] However, the following drawbacks remain: the device has a complex structure, high cost, and is not suitable for front-line production and operation requirements. This method also fails to meet the safety requirement of maintaining a 20cm distance from the bottom during loading and unloading.

[0017] Oil production lines need a sealed connection device that meets safety requirements, reduces the labor intensity of employees, and has low manufacturing costs. Summary of the Invention

[0018] The purpose of this utility model is to provide a sealed connection device between a storage tank and a vehicle tank, so that the connection device can achieve sealed loading and unloading during the loading and unloading process after the storage tank and the vehicle tank are connected, while ensuring that the length of the loading and unloading pipeline is adjustable, reducing its manufacturing cost, and reducing the labor intensity of employees while protecting the environment.

[0019] The technical solution of this utility model is: a sealed connection device between a storage tank and a truck tank includes an loading arm and a tailpipe, wherein: a cylinder with its upper closed end is fixed to the front end of the loading arm and is equipped with a telescopic pipe, which is sequentially connected to a connecting short section, an oil guide pipe with a truck tank sealing interface suspended on the outside, a quick connector and a tailpipe; the truck tank sealing interface, which is in sealing contact with the truck tank opening, is provided with an exhaust port that can transport gas through a pipeline; the pipe bodies of the telescopic pipe are connected to each other and to the cylinder through keyways and are equipped with sealing elements; a hoisting winch fixed on the loading arm is connected to the lower pipe body of the telescopic pipe through a hoisting cable.

[0020] Preferably, the tank sealing interface is a combination of a pipe and a tapered cylinder with a larger upper part and a smaller lower part. The vent is located in the upper end plate between the tapered cylinder and the pipe. The maximum outer diameter of the tapered cylinder is greater than the maximum inner diameter of the tank opening. The vent can be connected to a pipeline or a cap.

[0021] Preferably, when the tank sealing interface is made of metal material, the outer wall of the conical cylinder is equipped with a tank opening seal, which is a conical seal that conforms to the shape of the conical cylinder. The other end of the pipeline connected to the exhaust port is connected to the tank opening of the storage tank or is towed to a safe area.

[0022] Preferably, the conical cylinder of the tank sealing interface is a conical rubber cylinder with a built-in aluminum alloy frame.

[0023] Preferably, the telescopic tube mainly consists of telescopic short section one and telescopic short section two. Telescopic short section one is connected to the cylinder via a connecting key and a vertical sliding groove. A sealing element consisting of sealing ring one and guide band one is installed sequentially from top to bottom on the outer wall of the connecting key. The lower part of the tube body of telescopic short section one is connected to telescopic short section two via a connecting key and a vertical sliding groove. A sealing element consisting of sealing ring two and guide band one is installed sequentially from top to bottom on the outer wall of the connecting key.

[0024] Preferably, the connecting key on the outer wall of the telescopic sub-section one is connected to the vertical groove on the inner wall of the cylinder, and a sealing element consisting of a sealing ring one and a guide band one is installed sequentially from top to bottom on the outer wall of the connecting key of the telescopic sub-section one; the inner wall below the connecting key in the telescopic sub-section one is provided with a vertical groove and is connected to the connecting key at the upper end of the telescopic sub-section two; a sealing element consisting of a sealing ring two and a guide band one is installed sequentially from top to bottom on the outer wall of the connecting key of the telescopic sub-section two; the lower end inner cavities of the cylinder and the telescopic sub-section one are threadedly connected to locking cap one and locking cap two, respectively.

[0025] Preferably, the sealing ring one and sealing ring two are star-shaped sealing rings; the hoisting winch fixed on the loading arm is a hand-cranked winch with a self-locking function, and the hoisting winch is connected to the lifting ring fixed on the lower outer wall of the telescopic section two via a lifting cable.

[0026] Preferably, the connecting short section, the telescopic short section two, the oil guide pipe, the quick connector, and the tail pipe are sequentially connected by threads; the external thread of the connecting short section is connected to the pipe body threaded in the tank sealing interface suspended outside the oil guide pipe through a connecting sleeve; the connecting short section, the telescopic short section two, the oil guide pipe, and the quick connector are connected by tapered threads; the connecting sleeve is a corrugated pipe.

[0027] Preferably, the upper outer wall of the oil guide pipe is provided with a suspension step or suspension rod and the lower outer wall is provided with a quick connector limiting step. The outer diameter formed by the suspension step or suspension rod is larger than the inner diameter of the pipe in the tank sealing interface. The outer circle of the oil guide pipe below the quick connector limiting step is machined with an external thread that can be threaded to the quick connector.

[0028] Preferably, the external threaded connector in the quick coupling can be threadedly connected to the tailpipe or the plug cap; the plug cap is suspended from the upper end of the connecting section by a chain during the loading and unloading of the sealed connection device; the internal threaded connectors in the tailpipe and the quick coupling are fixed on both sides of the loading arm during the non-loading and unloading process of the sealed connection device.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The loading and unloading pipelines in this device are all sealed. The sealing rings used between the telescopic pipes are star-shaped sealing rings. Tapered thread seals are used at the connection between the connecting short section and the quick connector. A tapered cylindrical seal is used between the short section and the tank opening, which can ensure no leakage during loading. The telescopic pipe with sealing elements reduces the size of the tank loading and unloading pipeline while ensuring sealing; 2. The length of the loading and unloading pipeline is adjusted by using a lifting winch, which is labor-saving and quick; a flexible joint is used between the connecting short section and the tank sealing interface, which can achieve all-round adjustment.

[0030] 3. This device can discharge hazardous gases to a safe area through exhaust ports and pipelines.

[0031] 4. After loading and unloading, the tailpipe can be removed from the tanker's opening and placed on both sides of the loading arm to ensure the tanker's transportation safety. When this device is not in use, the external threaded joint of the quick connector can be sealed with a plug to prevent environmental pollution caused by material leakage from the device, avoid cleaning work, and reduce the labor intensity of employees.

[0032] In summary, this utility model is very suitable for use in storage tanks and trucks for single-well oil hauling in the petroleum industry. It can ensure that the single-well oil hauling well is fully enclosed and leak-free during the crude oil loading and unloading process. It is a safe and environmentally friendly sealed connection device for single-well oil hauling that saves time and effort and can reduce the labor intensity of employees.

[0033] Meanwhile, this utility model is also applicable to the connection between storage tanks of other materials and tank trucks for loading and unloading other materials, such as powders, granules, and other liquids. It can eliminate hazards, ensure safe production, prevent environmental pollution, and the device has a simple structure, is easy to operate, saves time and labor, and has significant practical effects. Attached Figure Description

[0034] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model.

[0035] Figure 2 yes Figure 1 Diagram showing the connection of the center plug cap.

[0036] In the diagram: 1. Hoisting winch; 2. Loading arm; 3. Cylinder; 4. Telescopic sub section 1; 5. Sealing ring 1; 6. Guide belt 1; 7. Locking cap 1; 8. Sealing ring 2; 9. Guide belt 2; 10. Locking cap 2; 11. Telescopic sub section 2; 12. Lifting ring; 13. Connecting sub section; 14. Connecting sleeve; 15. Tank sealing interface; 15-1 Tank opening seal; 16. Oil guide pipe; 17. Quick connector; 18. Tail pipe; 19. Plug cap. Detailed Implementation

[0037] The accompanying drawings are for reference and illustration only and are not intended to limit the scope of protection of this utility model. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0039] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] See Figures 1-2A sealed connection device between a storage tank and a truck tank includes an arm-mounted loading arm 2 and a tailpipe 18, wherein: a cylinder 3 with its upper end closed is fixed to the front end of the arm-mounted loading arm 2 and contains a telescopic pipe, which is sequentially connected to a connecting short section 13, an oil guide pipe 16 with a truck tank sealing interface 15 suspended on the outside, a quick connector 17, and a tailpipe 18; the truck tank sealing interface 15, which is in sealing contact with the truck tank opening, is provided with an exhaust port that can transport gas through a pipeline; the pipe bodies of the telescopic pipes are connected to each other and to the cylinder 3 through keyways and are equipped with seals; a hoisting winch 1 fixed on the arm-mounted loading arm 2 is connected to the lower pipe body of the telescopic pipe through a hoisting cable.

[0041] In this invention, the upper end of the cylinder 3 is closed, and seals are installed between the bodies of the telescopic pipe and between the telescopic pipe and the cylinder 3. The exhaust port of the tank-vehicle sealing interface 15 can discharge the gas generated during material transportation to a safe location through a pipeline. The above-mentioned multiple sealing measures ensure that all loading and unloading pipelines connected between the storage tank and the vehicle tank are completely sealed during the loading and unloading process, guaranteeing that the material is handled in a sealed manner during loading and unloading.

[0042] The telescopic pipe equipped with seals minimizes the size of the loading and unloading pipeline for tank trucks while ensuring a tight seal.

[0043] The length of the loading and unloading pipeline, consisting of a telescopic pipe, an oil guide pipe 16, and a tail pipe 18, is adjusted by using a hoisting winch 1, which is labor-saving and quick.

[0044] To reduce the labor intensity of employees, this utility model installs a lifting winch 1 on the loading arm 2 of the storage tank. The winch is connected to the lower part of the telescopic pipe via a hoisting cable, which can vertically lift and lower the tank opening of the tank truck, making the connection between the storage tank and the tank truck convenient and quick.

[0045] This utility model serves as a connecting device for loading between storage tanks and trucks, and is suitable for storage tanks containing powdered, granular, and liquid raw materials. It is especially suitable for use in storage tanks and trucks for single-well oil transportation in the petroleum industry, which reduces the labor intensity of employees while protecting the environment.

[0046] Based on the above embodiment one, this utility model also has the following embodiments: A preferred embodiment: The tank sealing interface 15 is a combination of a pipe body and a tapered cylinder (larger at the top and smaller at the bottom). The exhaust port is located in the upper end plate between the tapered cylinder and the pipe body. The maximum outer diameter of the tapered cylinder is larger than the inner diameter of the largest tank opening. The exhaust port can be connected to a pipeline or a cap. The maximum outer diameter of the tapered cylinder being larger than the inner diameter of the largest tank opening is suitable for all tank trucks. Connecting the exhaust port to a pipeline completes the exhaust task. Connecting the exhaust port to a cap prevents dust from entering the tank sealing interface 15 of this device during idle periods.

[0047] In a preferred embodiment: when the tank sealing interface 15 is made of metal, the outer wall of the conical cylinder is fitted with a tank opening seal 15-1. The tank opening seal 15-1 is a conical seal that conforms to the shape of the conical cylinder. The other end of the pipeline connected to the vent is connected to the tank opening of the storage tank or is pulled to a safe area. When the tank sealing interface 15 is made of metal, the tank opening seal 15-1 can be installed on the outside of the conical cylinder. The other end of the pipeline connected to the vent is led back into the storage tank. This is suitable for elevated storage tanks and elevated multi-functional storage tanks that are not pressurized inside, because the above-mentioned storage tanks are atmospheric pressure tanks and their tops are equipped with breather valves to release the pressure inside the tank. The escaped gas inside the tank can be led back into the storage tank, achieving the purpose of controlling the gas from escaping during loading and unloading of the tank, which can effectively reduce the risks during the process of pouring oil and liquid. For multi-functional horizontal storage tanks with internal pressure, the escaping gas inside the tank can be guided to a safe area through pipelines, thereby controlling the gas from escaping near the tanker and effectively reducing the risks during oil and liquid transfer.

[0048] In a preferred embodiment, the conical cylinder of the tank sealing interface 15 is a conical rubber cylinder with an internal aluminum alloy frame. The tank sealing interface 15 made of a conical rubber cylinder ensures a seal between the device and the tank opening. In this embodiment, the venting method of the pipeline connected to the vent is the same as the method of using the tank sealing interface 15 made of metal material.

[0049] In a preferred embodiment: the telescopic tube mainly consists of telescopic short section 4 and telescopic short section 11. Telescopic short section 4 is connected to cylinder 3 via a connecting key and a vertical sliding groove. A sealing element consisting of sealing ring 5 and guide band 6 is installed sequentially from top to bottom on the outer wall of the connecting key. The lower part of the telescopic short section 4 is connected to telescopic short section 11 via a connecting key and a vertical sliding groove. A sealing element consisting of sealing ring 8 and guide band 9 is installed sequentially from top to bottom on the outer wall of the connecting key.

[0050] A preferred embodiment: Figure 1As shown, the connecting key on the outer wall of the telescopic sub-section 4 is connected to the vertical groove on the inner wall of the cylinder 3, and a sealing element consisting of a sealing ring 5 and a guide band 6 is installed sequentially from top to bottom on the outer wall of the connecting key of the telescopic sub-section 4; the inner wall below the connecting key in the telescopic sub-section 4 has a vertical groove and is connected to the connecting key at the upper end of the telescopic sub-section 11; a sealing element consisting of a sealing ring 8 and a guide band 9 is installed sequentially from top to bottom on the outer wall of the connecting key of the telescopic sub-section 11; the lower inner cavities of the cylinder 3 and the telescopic sub-section 4 are threadedly connected to the locking cap 7 and the locking cap 10, respectively. With this configuration, the locking caps 7 and 10 can respectively limit the connecting keys in the cylinder 3 and the telescopic sub-section 4, allowing the connecting keys to be suspended on the locking caps 7 and 10; it also makes the installation and connection of the telescopic tube convenient and easy to maintain.

[0051] In a preferred embodiment: the sealing ring 5 and the sealing ring 8 are star-shaped sealing rings; the hoisting winch 1 fixed on the loading arm 2 is a hand-cranked winch with a self-locking function, and the hoisting winch 1 is connected to the lifting ring 12 fixed on the lower outer wall of the telescopic section 11 via a lifting cable.

[0052] The hoisting winch 1 is a hand-cranked winch with a self-locking function, which is convenient to use and has a low purchase cost. It can be operated by the staff on the top of the tanker.

[0053] In a preferred embodiment: the connecting short section 13, the telescopic short section 2 11, the oil guide pipe 16, the quick connector 17, and the tail pipe 18 are sequentially connected by threads. The external thread of the connecting short section 13 is connected to the pipe body thread in the tank sealing interface 15 suspended outside the oil guide pipe 16 through the connecting sleeve 14. The connecting short section 13, the telescopic short section 2 11, the oil guide pipe 16, and the quick connector 17 are connected by tapered threads, which can further ensure the sealing during the loading process. The connecting sleeve 14 is a corrugated pipe.

[0054] In a preferred embodiment: the upper outer wall of the oil guide pipe 16 is provided with a suspension step or suspension rod, and the lower outer wall is provided with a quick-connect limiting step. The outer diameter formed by the suspension step or suspension rod is larger than the inner diameter of the pipe in the tank sealing interface 15. ， The reliability and stability of the tank sealing interface 15 can be further improved by using a suspension step or suspension rod fixed to the outer wall of the oil guide pipe 16; the outer circle of the oil guide pipe 16 below the quick connector limiting step is machined with an external thread that can be threaded to the quick connector 17.

[0055] In a preferred embodiment: the external threaded connector in the quick connector 17 can be threadedly connected to the tail pipe 18 or the plug cap 19; the plug cap 19 is suspended from the upper end of the connecting section 13 by a chain during the loading and unloading of the sealed connection device; the internal threaded connectors in the tail pipe 18 and the quick connector 17 are fixed to both sides of the loading arm 2 during non-loading and unloading processes of the sealed connection device. When loading and unloading tank trucks, the internal threaded connector in the quick connector 17 is connected to the tail pipe 18; after the tank truck is loaded, the plug cap 19 is connected to the external threaded connector in the quick connector 17 to prevent material from dripping or scattering from the inner wall of the device; during the loading and unloading process of the device, the plug cap 19 can be suspended together with the upper end face of the connecting section 13 by a chain.

[0056] The internal threaded connector and tail pipe 18 in quick coupling 17 are fixed on both sides of the loading arm 2 during non-loading processes. The external threaded connector in quick coupling 17 is blocked with a plug cap 19 to prevent crude oil or other materials from spilling or dripping.

[0057] During the loading and unloading of this device, the plug cap 19 is suspended from the upper end of the connecting section 13 by a chain.

[0058] The following example, using storage tanks and trucks for single-well oil transportation in the petroleum industry, details the application process of this utility model:

[0059] In a single well, crude oil in the storage tank passes through loading arm 2, cylinder 3, telescopic sub 1 4, telescopic sub 2 11, connecting sub 13, oil guide pipe 16, quick connector 17 and tailpipe 18, and reaches the bottom of the tank truck, completing the crude oil filling.

[0060] The cylinder 3 and the telescopic sub-section 4 can move relative to each other and are sealed and guided by sealing ring 5 and guide band 6; the telescopic sub-section 4 and the telescopic sub-section 11 can move relative to each other and are sealed and guided by sealing ring 8 and guide band 9. All the sealing rings are star-shaped seals, which can effectively fill the sealing grooves where the sealing rings are installed, reduce the risk of leakage, and improve the safety of the device.

[0061] Lock cap 7 and lock cap 10 respectively limit the movement of telescopic sub-section 4 and telescopic sub-section 11; the suspension step or suspension rod on the outer wall of the oil guide pipe 16 can better ensure the reliability of its connection, prevent the tank sealing interface 15 from falling off the device and play a limiting role.

[0062] The internal threaded connector in quick coupling 17 that connects to tailpipe 18 is fixed on both sides of loading arm 2 in the non-fueling state. The external threaded connector in quick coupling 17 is plugged with cap 19 to prevent crude oil from leaking. During the feeding process, cap 19 is suspended from the upper end of connecting section 13 by chain.

[0063] The tank sealing interface 15 is connected to the connecting short section 13 via the connecting sleeve 14, which facilitates the adjustment of the position of the tank sealing interface 15 during refueling to ensure the sealing of the tank opening; the exhaust port in the tank sealing interface 15 can discharge the gas generated by crude oil during loading and unloading through the annulus between the oil guide pipe 16 and the tank sealing interface 15 via the pipeline.

[0064] The main function of the hand-cranked hoisting winch 1, fixed on the loading arm 2, is to lift and lower the loading and unloading pipelines in this device. Its self-locking function allows it to be parked in any position. The hoisting cable of the hoisting winch 1 is connected to the lower part of the telescopic section 11 via the lifting ring 12, thereby driving the movement of the entire loading and unloading pipeline.

[0065] The embodiments described above are merely typical examples, but the present invention is not limited to these embodiments. Those skilled in the art can make modifications without departing from the spirit and teachings of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the inventive spirit and concept of the present invention should be included within the protection scope of the present invention. Therefore, the protection scope is not limited to the above description.

Claims

1. A sealed connection device between a storage tank and a vehicle tank, comprising an loading arm and a tailpipe, characterized in that: The upper closed cylinder is fixed to the front end of the loading arm and contains a telescopic pipe. The telescopic pipe is sequentially connected to the connecting short section, the oil guide pipe with the tank sealing interface suspended on the outside, the quick connector, and the tail pipe. The tank sealing interface, which is in sealing contact with the tank opening, is equipped with an exhaust port that can transport gas through the pipeline. The tube bodies of the telescopic pipe are connected by keyways and sealed with seals. The hoisting winch fixed on the loading arm is connected to the lower tube body of the telescopic pipe by a hoisting cable.

2. The airtight connection device between a storage tank and a vehicle tank as described in claim 1, characterized in that, The tank sealing interface is a combination of a pipe body and a tapered cylinder with a larger upper part and a smaller lower part. The vent is located in the upper end plate between the tapered cylinder and the pipe body. The maximum outer diameter of the tapered cylinder is larger than the inner diameter of the largest tank opening. The vent can be connected to a pipeline or a cap.

3. The airtight connection device between a storage tank and a vehicle tank as described in claim 2, characterized in that, When the sealing interface of the tank is made of metal material, the outer wall of the conical cylinder is equipped with a tank opening seal. The tank opening seal is a conical seal that conforms to the shape of the conical cylinder. The other end of the pipeline connected to the exhaust port is connected to the tank opening of the storage tank or is towed to a safe area.

4. The airtight connection device between a storage tank and a vehicle tank as described in claim 2, characterized in that, The conical cylinder of the tank sealing interface is a conical rubber cylinder with an internal aluminum alloy frame.

5. A sealed connection device between a storage tank and a vehicle tank as described in claim 3 or 4, characterized in that, The telescopic tube mainly consists of telescopic section one and telescopic section two. Telescopic section one is connected to the cylinder via a connecting key and a vertical sliding groove. A sealing element consisting of sealing ring one and guide band one is installed sequentially from top to bottom on the outer wall of the connecting key. The lower part of the tube body of telescopic section one is connected to telescopic section two via a connecting key and a vertical sliding groove. A sealing element consisting of sealing ring two and guide band one is installed sequentially from top to bottom on the outer wall of the connecting key.

6. The airtight connection device between a storage tank and a vehicle tank as described in claim 5, characterized in that, The connecting key on the outer wall of the telescopic sub-section one is connected to the vertical groove on the inner wall of the cylinder, and a sealing element consisting of a sealing ring one and a guide band one is installed sequentially from top to bottom on the outer wall of the connecting key of the telescopic sub-section one; the inner wall below the connecting key in the telescopic sub-section one is provided with a vertical groove and is connected to the connecting key at the upper end of the telescopic sub-section two; the outer wall of the connecting key of the telescopic sub-section two is installed sequentially from top to bottom with a sealing element consisting of a sealing ring two and a guide band one; the lower end inner cavities of the cylinder and the telescopic sub-section one are respectively threadedly connected to locking cap one and locking cap two.

7. The airtight connection device between a storage tank and a vehicle tank as described in claim 6, characterized in that, The sealing ring one and sealing ring two are star-shaped sealing rings; the hoisting winch fixed on the loading arm is a hand-cranked winch with a self-locking function, and the hoisting winch is connected to the lifting ring fixed on the lower outer wall of the telescopic section two through a lifting cable.

8. The airtight connection device between a storage tank and a vehicle tank as described in claim 5, characterized in that, The connecting short section (13), the telescopic short section two (11), the oil guide pipe (16), the quick connector (17), and the tail pipe (18) are sequentially connected by threads. The external thread of the connecting short section is connected to the pipe body thread in the tank sealing interface suspended outside the oil guide pipe through the connecting sleeve. The connecting short section, the telescopic short section two, the oil guide pipe, and the quick connector are connected by tapered threads. The connecting sleeve is a corrugated pipe.

9. A sealed connection device between a storage tank and a vehicle tank as described in claim 8, characterized in that, The upper outer wall of the oil guide pipe is provided with a suspension step or suspension rod, and the lower outer wall is provided with a quick connector limiting step. The outer diameter formed by the suspension step or suspension rod is larger than the inner diameter of the pipe in the tank sealing interface. The outer circle of the oil guide pipe below the quick connector limiting step is machined with an external thread that can be threaded to the quick connector.

10. The airtight connection device between a storage tank and a vehicle tank as described in claim 9, characterized in that, The external threaded connector in the quick coupling can be threadedly connected to the tail tube or the plug cap; the plug cap is suspended on the upper end of the connecting section by a chain during the loading and unloading of the sealed connection device; the internal threaded connectors in the tail tube and quick coupling are fixed on both sides of the loading arm during the non-loading and unloading process of the sealed connection device.

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