A quick connect device for liquefied hydrocarbons

Abstract

The utility model relates to the technical field of petroleum chemical industry transportation, specifically relates to a kind of quick connecting device of liquefied hydrocarbon, including car end connector and the quick connecting assembly connected with car end connector;The first arc slot is set to the front of car end connector around;The quick connecting assembly includes sealing shaft, sliding outer ring is installed in the front of sealing shaft, fixed inner ring is installed in sealing shaft;The rear end of sealing shaft is installed with rear end connecting piece, and is connected by fastening screw;It adopts quick connecting assembly including sealing shaft, sliding outer ring is installed in the front of sealing shaft, fixed inner ring is installed in sealing shaft;The rear end of sealing shaft is installed with rear end connecting piece, and is connected by fastening screw;The front end of rear end connecting piece is installed in the barrel of sealing shaft rear portion, and is installed on the rear end of fixed inner ring;Valve core is installed between the rear end connecting piece and fixed inner ring, lock nut is installed in the rear end of valve coreIt has can be conveniently and quickly connected, improves connection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical transportation technology, specifically to a liquefied hydrocarbon quick connection device. Background Technology

[0002] In domestic chemical, petroleum, and hazardous materials transportation, the loading arm connection system is currently the most widely used and prevalent core equipment solution for tank truck loading and unloading operations. As a flexible, extendable, and rotatable pipe connection device, the loading arm is mainly used to realize the transfer of media between tank trucks and storage tanks or loading and unloading platforms.

[0003] In the specific connection process between the loading arm and the tank truck, the lever-type quick coupling is currently the mainstream connecting component. Due to its simple structure and convenient operation, this type of coupling has become the first choice for most loading and unloading scenarios. Operators only need to turn the handle on the outside of the coupling to quickly connect or disconnect the coupling from the tank truck interface, significantly shortening the preparation and completion time for a single loading and unloading operation. It is especially suitable for tank truck loading and unloading scenarios requiring high-frequency turnover. In terms of application coverage, lever-type quick couplings occupy an important position in the loading and unloading of refined oil products such as gasoline and diesel, as well as hazardous chemicals such as methanol, ethanol, and liquefied petroleum gas, covering almost 80% of tank truck loading and unloading points in small and medium-sized chemical industrial parks, oil depots, and logistics transfer stations in China.

[0004] However, in the specific connection between the loading arm and the tank truck, the traditional approach is to use a combination of the loading arm and a lever-type quick coupling. While this method offers certain advantages in operational efficiency, its safety shortcomings and potential risks have become increasingly apparent in long-term practical application. Its disadvantages are detailed below:

[0005] (1) The prevalence and causes of connector detachment risk: Detachment of lever-type quick connectors is not an accidental phenomenon, but a high-frequency problem caused by their structural characteristics and usage environment. From a structural design perspective, this type of connector mainly relies on a lever-driven snap-fit ​​structure to achieve sealing and fixation. Its connection strength depends entirely on the engagement depth of the snap and the interface, and it lacks secondary locking or anti-loosening devices. In actual operation, the following factors can directly cause detachment.

[0006] (1-1) Operational error: If the operator does not fully turn the lever to the locked position, or does not ensure that the connector is aligned with the tank truck interface during docking, the buckle will not engage sufficiently and will easily loosen under the pressure of the medium transmission; (1-2) Vibration effect: The operation of the tank truck engine, the vibration of the loading and unloading platform equipment, or the turbulent vibration generated by the high-speed flow of the medium in the pipeline will continuously impact the connection part of the connector. After long-term use, the buckle will easily wear and deform, reducing the connection stability; (1-3) Environmental corrosion: Acid and alkali gases and oil-gas mixtures present in the chemical park or oil depot environment will corrode the metal parts (such as buckles and shafts) of the lever-type quick connector, resulting in a decrease in component strength, jamming, and further increasing the probability of detachment.

[0007] (2) Media Leakage and Safety Risks Caused by Detachment: The direct consequence of detachment of the lever-type quick coupling is a large-scale leakage of the medium being transported inside the loading arm. The degree of risk caused by the leakage is directly related to the type of medium, with flammable and explosive media (such as gasoline, diesel, liquefied petroleum gas, ethylene, etc.) posing the most serious hazards. Specifically, this manifests as: Fire and Explosion Risks: After leakage, flammable and explosive media will rapidly evaporate, forming a flammable vapor cloud. If there are open flames (such as electrical sparks from equipment or vehicle exhaust sparks), high-temperature heat sources (such as the surface of equipment exposed to the sun or high-temperature pipelines), or if the vapor cloud concentration reaches the explosion limit, it will immediately cause a fire or explosion. Such accidents will not only damage loading and unloading equipment and tank trucks but may also affect surrounding personnel and facilities, causing casualties and significant property damage.

[0008] (3) Environmental pollution risk: Even if no fire or explosion occurs, the leaked flammable and explosive media can seep into the soil and groundwater, or spread to the surrounding area with the air, polluting the soil, water sources and air, causing long-term damage to the ecological environment, and may also harm human health through inhalation, skin contact and other means. (4) Operation interruption and economic loss: After a leakage accident occurs, loading and unloading operations must be stopped immediately, and personnel must be organized to clean up the leaked media and repair the equipment. This will not only cause delays in transportation plans, but also generate high cleanup costs and equipment repair costs.

[0009] (5) For the loading and unloading of toxic and harmful media, leakage caused by the detachment of joints can directly lead to personnel poisoning accidents, further expanding the scope of safety risks.

[0010] Therefore, the problem of lever-type quick couplings falling off has become a core safety hazard in domestic tank truck loading and unloading operations, seriously restricting the safety and stability of loading and unloading operations, and urgently needs to be solved through technical upgrades or solution optimization. Utility Model Content

[0011] The purpose of this invention is to provide a quick connection device for liquefied hydrocarbons, addressing the shortcomings and deficiencies of existing technologies.

[0012] The present invention provides a quick connection device for liquefied hydrocarbons, including a vehicle end connector and a quick connection assembly connected to the vehicle end connector.

[0013] The front perimeter of the vehicle end connector is provided with a first arc-shaped groove.

[0014] The quick-connect assembly includes a sealing shaft, a sliding outer ring installed at the front of the sealing shaft, and a fixed inner ring installed inside the sealing shaft; a rear end connector is installed at the rear end of the sealing shaft, which is connected by fastening screws.

[0015] The front end of the rear end connector is installed in the cylinder at the rear of the sealing shaft and on the rear end of the fixed inner ring; a valve core is installed between the rear end connector and the fixed inner ring, and a locking nut is installed at the rear end of the valve core.

[0016] The front end of the rear connector is an annular stepped platform, and a compression spring is installed on the annular stepped platform; the sealing shaft is a multi-stage cylindrical body, and an outer ring spring is sleeved on the front cylindrical body of the sealing shaft to form a spring locking mechanism.

[0017] The inner wall of the rear part of the sliding outer ring is provided with an annular cavity, and the top of the sliding outer ring is provided with a through hole, and a knob plunger is installed in the through hole; the knob plunger is engaged in a groove on the top surface of the front end of the sealing shaft.

[0018] The inner wall of the sliding outer ring is provided with an arc-shaped groove at the front end, and a locking screw and a collision-resistant block are installed in the arc-shaped groove; a collision-resistant block is installed in the front part of the arc-shaped groove to form a collision-resistant mechanism.

[0019] Furthermore, a second annular groove is provided around the front part of the rear connector, and a second sealing ring is installed on the second annular groove.

[0020] Furthermore, a third sealing groove is provided at the front of the fixed inner ring, and a sealing strip is installed in the third sealing groove.

[0021] Furthermore, four locking steel balls are provided around the front inner wall of the sliding outer ring.

[0022] Furthermore, a valve core sealing ring is installed at the front end of the valve core.

[0023] The beneficial effects of this utility model after adopting the above structure are as follows: The liquefied hydrocarbon quick connection device of this utility model adopts a quick connection component including a sealing shaft, a sliding outer ring installed at the front of the sealing shaft, and a fixed inner ring installed inside the sealing shaft; a rear end connector is installed at the rear end of the sealing shaft and connected by fastening screws; the front end of the rear end connector is installed in the cylinder at the rear of the sealing shaft and is installed on the rear end of the fixed inner ring; a valve core is installed between the rear end connector and the fixed inner ring, and a locking nut is installed at the rear end of the valve core. It has the advantages of convenient and quick connection and improved connection efficiency. Attached Figure Description

[0024] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the conductive state structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the left-side structure of this utility model;

[0029] Figure 5 This is a schematic diagram of the non-conductive state structure of this utility model. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0032] like Figures 1-2 As shown in the figure, a quick connection device for liquefied hydrocarbons according to this specific embodiment includes a vehicle end connector 1 and a quick connection assembly connected to the vehicle end connector.

[0033] The front perimeter of the vehicle end connector 1 is provided with a first arc-shaped groove;

[0034] The quick-connect assembly includes a sealing shaft 14, a sliding outer ring 5 installed at the front of the sealing shaft 14, and a fixed inner ring 8 installed inside the sealing shaft 14; a rear end connector 12 is installed at the rear end of the sealing shaft 14 and connected by fastening screws 11.

[0035] The front end of the rear end connector 12 is installed in the cylinder at the rear of the sealing shaft 14 and on the rear end of the fixed inner ring 8; a valve core 17 is installed between the rear end connector 12 and the fixed inner ring 8, and a locking nut 13 is installed at the rear end of the valve core 17.

[0036] The front end of the rear connector 12 is an annular stepped platform, and a compression spring 16 is installed on the annular stepped platform; the sealing shaft 14 is a multi-stage cylindrical body, and an outer ring spring 7 is sleeved on the front cylindrical body of the sealing shaft 14 to form a spring locking mechanism.

[0037] The inner wall of the rear part of the sliding outer ring 5 is provided with an annular cavity, and the top of the sliding outer ring 5 is provided with a through hole, and a knob plunger 4 is installed in the through hole; the knob plunger 4 is engaged in the groove on the top surface of the front end of the sealing shaft.

[0038] The inner wall of the sliding outer ring 5 is provided with an arc-shaped groove at the front end, and a locking screw 3 and a collision block 2 are installed in the arc-shaped groove; a collision block is installed in the front part of the arc-shaped groove to form a collision prevention mechanism.

[0039] Furthermore, a second annular groove is provided around the front part of the rear connector 12, and a second sealing ring 9 is installed on the second annular groove.

[0040] Furthermore, a third sealing groove is provided at the front of the fixed inner ring 8, and a sealing strip is installed in the third sealing groove.

[0041] Furthermore, four locking steel balls 18 are provided around the front inner wall of the sliding outer ring 5.

[0042] Furthermore, a valve core sealing ring 15 is installed at the front end of the valve core 17.

[0043] The working principle of this utility model is as follows:

[0044] like Figure 3 As shown, in this design, a sliding outer ring is installed on the front part of the sealing shaft, and a fixed inner ring is installed inside the sealing shaft; a rear end connector is installed at the rear end of the sealing shaft, connected by fastening screws. In this design, four locking steel balls are provided around the front inner wall of the sliding outer ring, and a first arc-shaped groove is provided around the front of the vehicle end connector. During installation and connection, the locking steel balls are used to press the vehicle end connector against the fixed inner ring, pushing the fixed inner ring to move towards the rear end.

[0045] like Figure 3-5As shown, in this design, the front end of the rear connector is an annular stepped platform, and a compression spring is installed on the annular stepped platform; the sealing shaft is a multi-stage cylindrical body, and an outer ring spring is sleeved on the front cylindrical body of the sealing shaft, forming a spring locking mechanism. When the vehicle end connector is disengaged from the quick-connect assembly, the vehicle end connector is disengaged, and the outer ring spring returns to its original state.

[0046] In this design, a valve core sealing ring is installed at the front end of the valve core for sealing purposes.

[0047] This design can adapt to the interface positions of different tank cars through a movable structure, while reducing the space occupation and wear problems of fixed pipelines.

[0048] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A liquefied hydrocarbon rapid connection device, characterized in that: Includes vehicle-end connectors and quick-connect components that connect to the vehicle-end connectors; The front of the vehicle end connector is provided with a first arc-shaped groove around its perimeter; the quick-connect assembly includes a sealing shaft, a sliding outer ring is installed at the front of the sealing shaft, and a fixed inner ring is installed inside the sealing shaft; a rear end connector is installed at the rear end of the sealing shaft and is connected by fastening screws. The front end of the rear end connector is installed in the cylinder at the rear of the sealing shaft and on the rear end of the fixed inner ring; a valve core is installed between the rear end connector and the fixed inner ring, and a locking nut is installed at the rear end of the valve core. The front end of the rear connector is an annular stepped platform, and a compression spring is installed on the annular stepped platform; the sealing shaft is a multi-stage cylindrical body, and an outer ring spring is sleeved on the front cylindrical body of the sealing shaft to form a spring locking mechanism. The inner wall of the rear part of the sliding outer ring is provided with an annular cavity, and the top of the sliding outer ring is provided with a through hole, and a knob plunger is installed in the through hole; the knob plunger is engaged in a groove on the top surface of the front end of the sealing shaft. The inner wall of the sliding outer ring is provided with an arc-shaped groove at the front end, and a locking screw and a collision-resistant block are installed in the arc-shaped groove; a collision-resistant block is installed in the front part of the arc-shaped groove to form a collision-resistant mechanism.

2. The liquefied hydrocarbon quick connection device according to claim 1, characterized in that: The front part of the rear connector has a second annular groove around its perimeter, and a second sealing ring is installed on the second annular groove.

3. The liquefied hydrocarbon quick connection device according to claim 1, characterized in that: The front part of the fixed inner ring is provided with a third sealing groove, and a sealing strip is installed in the third sealing groove.

4. The liquefied hydrocarbon quick connection device according to claim 1, characterized in that: Four locking steel balls are provided around the inner wall of the front part of the sliding outer ring.

5. The liquefied hydrocarbon quick connection device according to claim 1, characterized in that: A valve core sealing ring is installed at the front end of the valve core.

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