Cylinder compression type oil gas recovery sealing device for automobile fluid loading and unloading arm

Abstract

The invention relates to the technical field of fluid loading and unloading arms, and discloses an air cylinder compression type automobile fluid loading and unloading arm oil gas recovery sealing device which comprises a sealing cap, a vertical pipe, an adapter pipe and a lifting frame, and the adapter pipe and the lifting frame are installed at the top of the vertical pipe. A pressing air cylinder used for driving the lifting frame to move up and down is installed on the top of the guide plate, the two ends of the bottom of the lifting frame are installed on the tops of sealing caps respectively, and the sealing caps are connected with oil gas recovery pipes. The outer end of the guide plate is recessed inwards to form a guide groove, and the lifting plate is located in the guide groove. The two symmetrically-arranged guide plates and guide groove structures are adopted, accurate guiding is provided for the lifting frame, it is guaranteed that the lifting plates stably slide in the guide grooves, deviation of the sealing caps in the lifting process is avoided, it is guaranteed that the sealing caps are accurately aligned with the tank opening, and the sealing reliability is improved.

Description

Technical Field

[0001] This invention relates to the technical field of fluid loading arms, and more specifically, to a cylinder-pressurized automotive fluid loading arm oil-gas recovery sealing device. Background Technology

[0002] In automotive fluid loading and unloading operations, the fluid loading and unloading arm is the core equipment for realizing the transfer of media such as oil and chemical fluids, while the oil and gas recovery sealing device is a key component to ensure operational safety and prevent environmental pollution.

[0003] In existing fluid loading and unloading arms, the oil and gas recovery sealing devices often lack a stable guiding structure for the lifting mechanism of the sealing cap, relying solely on simple sliding contact to achieve lifting. During operation, the lifting components are prone to lateral displacement due to vibration and uneven load, resulting in inaccurate alignment between the sealing cap and the tank opening, leading to uneven sealing surface contact and ultimately causing oil and gas leaks. This not only wastes resources but also poses safety hazards. Summary of the Invention

[0004] The purpose of this invention is to provide a cylinder-pressurized automotive fluid loading and unloading arm oil and gas recovery sealing device, which aims to solve the problem that the lifting mechanism of the sealing cap in the prior art often lacks a stable guiding structure.

[0005] This invention relates to a cylinder-pressurized automotive fluid loading and unloading arm oil and gas recovery sealing device, comprising a sealing cap, a vertical pipe, a transfer pipe installed on the top of the vertical pipe, and a lifting frame. The bottom of the vertical pipe and the transfer pipe are connected by a flange. Two symmetrically arranged guide plates are bolted to the top of the flange. The guide plates are horizontally arranged. A pressing cylinder for driving the lifting frame to move up and down is installed on the top of the guide plate. The telescopic rods of the two pressing cylinders are connected by the lifting frame. The bottom ends of the lifting frame are respectively installed on the top of the sealing cap. The sealing cap is sleeved on the vertical pipe and is coaxially arranged with the vertical pipe. An oil and gas recovery pipe is connected to the sealing cap. The lifting frame includes two vertically spaced lifting plates, which are connected by a horizontal plate. The telescopic rods of the two pressing cylinders are respectively connected to the two sides of the horizontal plate. The two lifting plates are respectively connected to the two sides of the top of the sealing cap. The outer end of the guide plate is recessed inward to form a guide groove, and the lifting plate is located in the guide groove.

[0006] Furthermore, the sealing cap includes a movable disc, which is sleeved on the vertical pipe and slidably engaged with the vertical pipe. Two lifting plates are respectively connected to the top sides of the movable disc. A guide cylinder is fixedly connected to the bottom of the movable disc. The guide cylinder is connected to the oil and gas recovery pipe. A sealing cover plate is connected to the bottom of the guide cylinder. A conical sealing sleeve for sealing the filling port is installed at the bottom of the sealing cover plate. The conical sealing sleeve is coaxially arranged with the vertical pipe and has an oil and gas guiding cavity.

[0007] Furthermore, the guide cylinder is coaxially arranged with the vertical pipe, and the inner wall of the guide cylinder and the outer wall of the vertical pipe are spaced apart to form an oil and gas recovery chamber that communicates with the oil and gas guiding cavity.

[0008] Furthermore, the inner wall of the sealing cover extends toward the outer wall of the vertical tube to form an inner section. The inner section is arranged around the circumference of the vertical tube and slides with the vertical tube. The inner section is provided with multiple vent holes. The oil and gas guiding cavity and the oil and gas recovery cavity are connected through the vent holes.

[0009] Furthermore, the movable disk is provided with a liquid level switch mounting hole, which penetrates the built-in section and communicates with the oil and gas guide cavity.

[0010] Furthermore, a shock-absorbing structure is installed on the bottom of the flange, and the shock-absorbing structure is arranged opposite to the sealing cap.

[0011] Furthermore, the damping structure includes a retaining ring, which is sleeved on the outside of the vertical pipe and slides with the vertical pipe; the retaining ring is located directly below the flange, and the retaining ring and the flange are connected by multiple damping springs, which are arranged at intervals around the circumference of the vertical pipe, and the damping springs are sleeved on the outside of the bolts on the flange; the retaining ring has multiple transition holes for the bolts to pass through and extend into.

[0012] Furthermore, a buffer washer is installed on the top of the movable disk, and the buffer washer is arranged opposite to the retaining ring.

[0013] Furthermore, the bottom of the conical sealing sleeve extends downward to form an elastically deformable inner sealing band. The inner sealing band is arranged around the bottom of the conical sealing sleeve and is arranged in an arc shape outward. A deformable inner cavity is opened inside the conical sealing sleeve. The bottom of the deformable inner cavity extends into the inner sealing band. The deformable inner cavity is arranged around the circumference of the oil and gas guide cavity and is arranged in isolation from the oil and gas guide cavity. An elastically deformable airbag pad layer is provided on the outer wall of the conical sealing sleeve. The airbag pad layer is arranged around the circumference of the conical sealing sleeve and is filled with gas. The bottom of the airbag pad layer extends toward the inner sealing strip to form an inner sealing airbag layer. An elastically deformable inner abutment sealing strip is formed around the outer wall of the inner sealing strip. The inner abutment sealing strip is arranged in an arc shape facing upwards. The inner wall of the inner abutment sealing strip abuts against the bottom of the inner sealing airbag layer. The inner abutment sealing strip is located below the conical sealing sleeve. As the sealing cap moves towards the can opening to seal, the inner sealing strip, carrying the inner sealing airbag layer, first enters the can opening. The pressing cylinder, through the lifting frame, drives the airbag pad layer of the conical sealing sleeve to press against the top edge of the can opening. During the compression of the airbag pad layer and the conical sealing sleeve, the outer wall of the conical sealing sleeve is recessed towards the deformed inner cavity. The lower part of the inner sealing strip drives the inner sealing airbag layer to swing towards the bottom inner edge of the can opening. The gas in the airbag pad layer flows towards the inner sealing airbag layer, causing the inner sealing airbag layer to expand and seal along the bottom inner edge of the can opening, achieving a double sealing effect.

[0014] Furthermore, a fixing rod is provided at the bottom of the sealing cover plate, the fixing rod is located in the deformable inner cavity, a linkage rod is hinged to the bottom of the fixing rod, a swing rod is hinged to the end of the linkage rod away from the fixing rod, a guide rod is slidably connected to the swing rod, and the top of the guide rod is fixedly connected to the bottom of the sealing cover plate; the linkage rod is arranged in an inclined shape, and the lower part of the linkage rod is connected to the bottom of the sealing cover plate by a return spring, the return spring being sleeved on the outside of the guide rod; The swing rod is provided with a guide groove, which extends along the length of the swing rod. A fixed guide head is provided at the bottom of the guide rod, and the guide rod slides in cooperation with the guide groove of the swing rod through the fixed guide head. The bottom of the swing rod bends and extends toward the bottom of the deformable inner cavity. When the airbag cushion layer and the conical sealing sleeve are compressed, the outer wall of the conical sealing sleeve is concave towards the deformed inner cavity, the lower part of the linkage rod is compressed and moves upward, the lower part of the linkage rod drives the swing rod to move upward, the lower part of the swing rod drives the inner sealing strip to swing outward, and the inner sealing strip drives the inner sealing airbag layer to seal along the bottom inner edge of the can opening, achieving a double sealing effect.

[0015] Compared with existing technologies, the cylinder-pressed automotive fluid loading and unloading arm oil and gas recovery sealing device provided by this invention adopts two symmetrically arranged guide plates and guide groove structures to provide precise guidance for the lifting frame, ensuring that the lifting plate slides stably in the guide groove, avoiding displacement during the lifting of the sealing cap, ensuring precise alignment between the sealing cap and the tank opening, and improving sealing reliability. The lifting frame connects the two lifting plates through a transverse plate to form a stable frame structure. With the synchronous drive of the pressing cylinders on both sides, the driving force on the sealing cap is balanced, achieving smooth lifting and reducing the impact of vibration on the sealing structure. The sealing cap and the vertical pipe are arranged coaxially to ensure the coaxiality of the sealing component and the tank opening, avoiding uneven sealing surface contact caused by eccentricity. At the same time, the oil and gas recovery pipe is directly connected to the sealing cap, shortening the oil and gas recovery path and reducing the risk of leakage. This solves the problem that the lifting mechanism of the sealing cap often lacks a stable guiding structure. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the cylinder-pressing type automotive fluid loading and unloading arm oil and gas recovery sealing device provided by the present invention; Figure 2 This is a three-dimensional schematic diagram of the oil and gas recovery sealing device provided by the present invention; Figure 3 This is a cross-sectional structural schematic diagram of the oil and gas recovery sealing device provided by the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the connection between the sealing cap and the can opening provided by the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the cross-sectional structure of the connection between the sealing cap and the can opening provided by the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the cross-sectional structure of the connection between the sealing cap and the can opening provided by the present invention. Figure 3 ; Figure 7 This is a schematic diagram of the cross-sectional structure of the connection between the sealing cap and the can opening provided by the present invention. Figure 4 .

[0017] In the diagram: 10 vertical pipe, 20 adapter pipe, 30 sealing cap, 40 lifting frame, 50 guide plate, 60 clamping cylinder, 70 oil and gas recovery pipe, 80 shock absorption structure, 90 fluid loading and unloading arm, 11 flange, 12 bolt, 31 moving plate, 32 guide cylinder, 33 sealing cover plate, 34 conical sealing sleeve, 35 oil and gas guide cavity, 36 buffer washer, 37 liquid level switch mounting hole, 38 inner sealing strip, 39 deformable inner cavity, 310 airbag pad, 311 inner sealing airbag layer, 312 inner abutment sealing strip, 321 oil and gas recovery cavity, 331 built-in section, 332 vent hole, 333 fixed rod, 334 linkage rod, 335 swing rod, 336 guide rod, 337 return spring, 338 guide groove, 339 fixed guide head, 41 lifting plate, 42 horizontal plate, 51 guide groove, 61 telescopic rod, 81 retaining ring, 82 shock absorption spring, 83 transition hole. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 and not intended to limit the invention.

[0019] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0020] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] Reference Figure 1-7 The image shown is a preferred embodiment of the present invention.

[0022] The cylinder-pressed automotive fluid loading and unloading arm 90 oil and gas recovery sealing device includes a sealing cap 30, a vertical pipe 10, a transfer pipe 20 installed on the top of the vertical pipe 10, and a lifting frame 40. The bottom of the vertical pipe 10 and the transfer pipe 20 are connected by a flange 11. Two symmetrically arranged guide plates 50 are connected to the top of the flange 11 by bolts 12. The guide plates 50 are horizontally arranged. A pressing cylinder 60 for driving the lifting frame 40 to move up and down is installed on the top of the guide plate 50. The telescopic rods 61 of the two pressing cylinders 60 are connected by the lifting frame 40. The bottom ends of the lifting frame 40 are respectively installed on the top of the sealing cap 30. The sealing cap 30 is sleeved on the vertical pipe 10 and is coaxially arranged with the vertical pipe 10. An oil and gas recovery pipe 70 is connected to the sealing cap 30. The lifting frame 40 includes two vertically spaced lifting plates 41, which are connected by a horizontal plate 42. The telescopic rods 61 of the two pressing cylinders 60 are respectively connected to the two sides of the horizontal plate 42. The two lifting plates 41 are respectively connected to the two sides of the top of the sealing cap 30. The outer end of the guide plate 50 is recessed inward to form a guide groove 51, and the lifting plate 41 is located in the guide groove 51.

[0023] The aforementioned cylinder-pressurized automotive fluid loading and unloading arm 90 oil and gas recovery sealing device employs two symmetrically arranged guide plates 50 and guide grooves 51 to provide precise guidance for the lifting frame 40, ensuring stable sliding of the lifting plate 41 within the guide groove 51, preventing displacement of the sealing cap 30 during lifting, ensuring precise alignment of the sealing cap 30 with the tank opening, and improving sealing reliability. The lifting frame 40 connects the two lifting plates 41 via a transverse plate 42, forming a stable frame structure. Combined with the synchronous drive of the two pressing cylinders 60, the driving force on the sealing cap 30 is balanced, achieving smooth lifting and reducing the impact of vibration on the sealing structure. The sealing cap 30 is coaxially arranged with the vertical pipe 10, ensuring coaxiality between the sealing component and the tank opening, avoiding uneven sealing surface contact due to eccentricity. Simultaneously, the oil and gas recovery pipe 70 is directly connected to the sealing cap 30, shortening the oil and gas recovery path and reducing leakage risk. This solves the problem of many lifting mechanisms of the sealing cap 30 lacking a stable guiding structure.

[0024] In this embodiment, the sealing cap 30 includes a movable disk 31, which is sleeved on the vertical pipe 10 and slides with the vertical pipe 10. Two lifting plates 41 are respectively connected to the two sides of the top of the movable disk 31. A guide cylinder 32 is fixedly connected to the bottom of the movable disk 31. The guide cylinder 32 is connected to the oil and gas recovery pipe 70. A sealing cover plate 33 is connected to the bottom of the guide cylinder 32. A conical sealing sleeve 34 for sealing the filling port is installed at the bottom of the sealing cover plate 33. The conical sealing sleeve 34 is coaxially arranged with the vertical pipe 10 and has an oil and gas guiding cavity 35.

[0025] The movable disc 31 slides in conjunction with the vertical pipe 10 to ensure smooth and uninterrupted lifting of the sealing cap 30, thus improving operational stability. The conical sealing sleeve 34 adopts a conical structure, which can form a tight fit with filling ports of different diameters, providing strong adaptability and significantly enhancing the sealing effect, preventing oil and gas from leaking from the gaps in the sealing surface. The oil and gas guide cavity 35 provides a dedicated flow channel for oil and gas, guiding them to quickly converge into the oil and gas recovery pipe 70, reducing the retention of oil and gas in the sealed space, and improving recovery efficiency. The guide cylinder 32 achieves a stable connection between the movable disc 31 and the sealing cover plate 33, while also providing an installation interface for the oil and gas recovery pipe 70, integrating sealing and recovery functions.

[0026] In this embodiment, the guide cylinder 32 is arranged coaxially with the vertical pipe 10, and the inner wall of the guide cylinder 32 and the outer wall of the vertical pipe 10 are spaced apart to form an oil and gas recovery chamber 321 that communicates with the oil and gas guide cavity 35.

[0027] The guide cylinder 32 and the vertical pipe 10 are arranged coaxially to ensure that the device is subjected to uniform force, reduce the eccentric load during the lifting process, and extend the service life of the components. The oil and gas recovery chamber 321 formed between the guide cylinder 32 and the vertical pipe 10 expands the effective space for oil and gas recovery and increases the recovery amount per unit time. The oil and gas recovery chamber 321 is connected to the oil and gas guide chamber 35 to form a complete oil and gas recovery channel, which makes the oil and gas flow path smooth, reduces the recovery resistance, and improves the recovery efficiency.

[0028] In this embodiment, the inner sidewall of the sealing cover plate 33 extends toward the outer wall of the vertical tube 10 to form an inner section 331. The inner section 331 is arranged around the circumference of the vertical tube 10. The inner section 331 slides with the vertical tube 10. Multiple vent holes 332 are provided on the inner section 331. The oil and gas guiding cavity 35 and the oil and gas recovery cavity 321 are connected through the vent holes 332.

[0029] The built-in section 331 circumferentially surrounds and slides around the vertical pipe 10, enhancing the connection stability between the sealing cover plate 33 and the vertical pipe 10 and preventing the sealing cover plate 33 from shaking and causing sealing failure. Multiple vent holes 332 achieve uniform communication between the oil and gas guiding chamber 35 and the recovery chamber, allowing oil and gas to disperse into the recovery chamber, avoiding incomplete recovery caused by local oil and gas accumulation, and further improving recovery efficiency. The design of the built-in section 331 extends the axial length of the sealing structure, increases the path resistance of oil and gas leakage, and helps to improve sealing performance.

[0030] In this embodiment, a liquid level switch mounting hole 37 is provided on the movable disk 31. The liquid level switch mounting hole 37 passes through the built-in section 331 and is connected to the oil and gas guide cavity 35.

[0031] The level switch mounting hole 37 provides a convenient installation position for the level switch without requiring additional modifications to the sealing cap 30 structure, resulting in high assembly efficiency.

[0032] In this embodiment, a shock-absorbing structure 80 is installed on the bottom of the flange 11, and the shock-absorbing structure 80 is arranged opposite to the sealing cap 30.

[0033] The shock-absorbing structure 80 is arranged opposite to the sealing cap 30, which can directly buffer the impact force during the lifting and lowering of the sealing cap 30, and reduce the damage of vibration to core components such as the sealing cap 30 and the vertical pipe 10.

[0034] In this embodiment, the damping structure 80 includes a retaining ring 81, which is sleeved on the outside of the vertical tube 10 and slides with the vertical tube 10. The retaining ring 81 is located directly below the flange 11, and the retaining ring 81 and the flange 11 are connected by a plurality of damping springs 82. The plurality of damping springs 82 are arranged at intervals around the circumference of the vertical tube 10, and the damping springs 82 are sleeved on the outside of the bolts 12 on the flange 11. The retaining ring 81 has a plurality of transition holes 83 for the bolts 12 to pass through and extend into.

[0035] The retaining ring 81 works in conjunction with the shock-absorbing spring 82 to effectively absorb the impact force when the sealing cap 30 rises, thus buffering and reducing operating noise. The shock-absorbing spring 82 is sleeved on the outside of the bolt 12, making reasonable use of the space around the bolt 12 without occupying additional installation space, making the device structure more compact. The transition hole 83 allows the bolt 12 to pass through without affecting the connection between the flange 11 and the guide plate 50, ensuring that the shock-absorbing structure 80 is compatible with the original connection structure and is easy to assemble.

[0036] In this embodiment, a buffer washer 36 is installed on the top of the movable disk 31, and the buffer washer 36 is arranged opposite to the retaining ring 81.

[0037] The buffer washer 36 is arranged opposite to the retaining ring 81. When the sealing cap 30 rises and contacts the retaining ring 81, it further buffers the impact force. The damping effect is improved by the dual damping of the buffer washer 36 and the damping spring 82.

[0038] In this embodiment, the bottom of the conical sealing sleeve 34 extends downward to form an elastically deformable inner sealing band 38. The inner sealing band 38 is arranged around the bottom of the conical sealing sleeve 34 and is arranged in an arc shape outward. A deformable inner cavity 39 is opened inside the conical sealing sleeve 34. The bottom of the deformable inner cavity 39 extends into the inner sealing band 38. The deformable inner cavity 39 is arranged around the circumference of the oil and gas guide cavity 35 and is arranged separately from the oil and gas guide cavity 35. An elastically deformable airbag pad 310 is provided on the outer wall of the conical sealing sleeve 34. The airbag pad 310 is arranged around the circumference of the conical sealing sleeve 34. The airbag pad 310 is filled with gas. The bottom of the airbag pad 310 extends toward the inner sealing strip 38 to form an inner sealing airbag layer 311. An elastically deformable inner abutment sealing strip 312 is formed around the outer wall of the inner sealing strip 38. The inner abutment sealing strip 312 is arranged in an arc shape facing upwards. The inner wall of the inner abutment sealing strip 312 abuts against the bottom of the inner sealing airbag layer 311. The inner abutment sealing strip 312 is located below the conical sealing sleeve 34. As the sealing cap 30 is being sealed towards the can opening, the inner sealing strip 38, carrying the inner sealing airbag layer 311, first enters the can opening. The pressing cylinder 60, through the lifting frame 40, causes the airbag pad layer 310 of the conical sealing sleeve 34 to press against the top edge of the can opening. During the compression of the airbag pad layer 310 and the conical sealing sleeve 34, the outer wall of the conical sealing sleeve 34 is recessed towards the deformable inner cavity 39. The lower part of the inner sealing strip 38 causes the inner sealing airbag layer 311 to swing towards the bottom inner edge of the can opening. The gas in the airbag pad layer 310 flows towards the inner sealing airbag layer 311, causing the inner sealing airbag layer 311 to expand and seal along the bottom inner edge of the can opening, achieving a double sealing effect.

[0039] The inner sealing strip 38 is arc-shaped and elastically deformable, allowing it to enter the can opening for initial positioning and pre-sealing, laying the foundation for subsequent precise sealing. It also accommodates slight deviations in can openings of different sizes. The airbag pad 310 is squeezed against the top edge of the can opening to form the first seal, utilizing the elastic deformation of the gas to adapt to the irregular contour of the top of the can opening, resulting in a high degree of sealing fit.

[0040] During the extrusion process, the deformed inner cavity 39 of the conical sealing sleeve 34 provides space for the outer wall to be recessed, causing the gas in the airbag pad layer 310 to flow into the inner sealing airbag layer 311, so that it expands and forms a second seal with the inner edge of the bottom of the tank opening. The double sealing structure greatly improves the sealing reliability and effectively prevents oil and gas leakage.

[0041] The inner sealing strip 312 abuts against the bottom of the inner sealing airbag layer 311, enhancing the structural stability of the inner sealing airbag layer 311, preventing excessive deformation, ensuring consistent sealing effect, and at the same time, the elastic structure adapts to fluctuations in tank opening size, improving the adaptability of the device.

[0042] In this embodiment, a fixing rod 333 is provided at the bottom of the sealing cover plate 33. The fixing rod 333 is located in the deformable inner cavity 39. A linkage rod 334 is hinged to the bottom of the fixing rod 333. A swing rod 335 is hinged to the end of the linkage rod 334 away from the fixing rod 333. A guide rod 336 is slidably connected to the swing rod 335. The top of the guide rod 336 is fixedly connected to the bottom of the sealing cover plate 33. The linkage rod 334 is arranged in an inclined manner. The lower part of the linkage rod 334 is connected to the bottom of the sealing cover plate 33 by a return spring 337. The return spring 337 is sleeved on the outside of the guide rod 336. The swing rod 335 is provided with a guide groove 338, which extends along the length of the swing rod 335. The bottom of the guide rod 336 is provided with a fixed guide head 339, and the guide rod 336 slides in cooperation with the guide groove 338 of the swing rod 335 through the fixed guide head 339. The bottom of the swing rod 335 bends and extends toward the bottom of the deformable inner cavity 39. When the airbag cushion layer 310 and the conical sealing sleeve 34 are compressed, the outer wall of the conical sealing sleeve 34 is recessed into the deformable inner cavity 39. The lower part of the linkage rod 334 is compressed and moves upward. The lower part of the linkage rod 334 drives the swing rod 335 to move upward. The lower part of the swing rod 335 drives the inner sealing strip 38 to swing outward. The inner sealing strip 38 drives the inner sealing airbag layer 311 to seal along the bottom inner edge of the can opening, achieving a double sealing effect.

[0043] The mechanical linkage mechanism composed of fixed rod 333, linkage rod 334, and swing rod 335 provides precise driving force for the swing of inner sealing strip 38, ensuring that inner sealing strip 38 swings stably outward during extrusion and avoiding incomplete sealing caused by failure of elastic structure; the sliding cooperation between guide rod 336 and guide groove 338 limits the movement trajectory of swing rod 335, ensuring that the swing direction of inner sealing strip 38 is accurate, so that inner sealing airbag layer 311 accurately fits the inner edge of bottom of can opening; after extrusion, return spring 337 drives linkage rod 334 and swing rod 335 to return to their original positions, which facilitates the detachment of sealing cap 30 from can opening, improves the continuity of operation, and at the same time, the return function can prevent parts from jamming and extend the service life of the mechanism.

[0044] The linkage mechanism, in conjunction with the elastic sealing structure, further enhances the stability and reliability of the double sealing effect. Even if the performance of the elastic components slightly deteriorates after long-term use, the mechanical linkage can still ensure proper sealing and improve the durability of the device.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cylinder-pressurized automotive fluid loading and unloading arm oil-gas recovery sealing device, characterized in that, The device includes a sealing cap, a vertical pipe, a transfer pipe installed on top of the vertical pipe, and a lifting frame. The bottom of the vertical pipe and the transfer pipe are connected by a flange. Two symmetrically arranged guide plates are bolted to the top of the flange. The guide plates are horizontally arranged. A clamping cylinder for driving the lifting frame to move up and down is installed on the top of the guide plate. The telescopic rods of the two clamping cylinders are connected by the lifting frame. The bottom ends of the lifting frame are respectively installed on the top of the sealing cap. The sealing cap is sleeved on the vertical pipe and is coaxially arranged with the vertical pipe. An oil and gas recovery pipe is connected to the sealing cap. The lifting frame includes two vertically spaced lifting plates, which are connected by a horizontal plate. The telescopic rods of the two pressing cylinders are respectively connected to the two sides of the horizontal plate. The two lifting plates are respectively connected to the two sides of the top of the sealing cap. The outer end of the guide plate is recessed inward to form a guide groove, and the lifting plate is located in the guide groove.

2. The cylinder-pressing type automotive fluid loading and unloading arm oil-gas recovery sealing device as described in claim 1, characterized in that, The sealing cap includes a movable disc, which is sleeved on the vertical pipe and slidably fitted with the vertical pipe. Two lifting plates are respectively connected to the top of the movable disc on both sides. A guide cylinder is fixedly connected to the bottom of the movable disc and is connected to the oil and gas recovery pipe. A sealing cover plate is connected to the bottom of the guide cylinder. A conical sealing sleeve for sealing the filling port is installed at the bottom of the sealing cover plate. The conical sealing sleeve is coaxially arranged with the vertical pipe and has an oil and gas guiding cavity.

3. The cylinder-pressing type automotive fluid loading and unloading arm oil-gas recovery sealing device as described in claim 2, characterized in that, The guide cylinder is arranged coaxially with the vertical pipe, and the inner wall of the guide cylinder and the outer wall of the vertical pipe are spaced apart to form an oil and gas recovery chamber that communicates with the oil and gas guiding cavity.

4. The cylinder-pressing type automotive fluid loading and unloading arm oil-gas recovery sealing device as described in claim 3, characterized in that, The inner wall of the sealing cover extends toward the outer wall of the vertical tube to form an inner section. The inner section is arranged around the circumference of the vertical tube and slides with the vertical tube. The inner section is provided with multiple vent holes. The oil and gas guiding cavity and the oil and gas recovery cavity are connected through the vent holes.

5. The cylinder-pressing type automotive fluid loading and unloading arm oil-gas recovery sealing device as described in claim 1, characterized in that, The movable disk has a liquid level switch mounting hole that penetrates the built-in section and communicates with the oil and gas guide cavity.

6. The cylinder-pressurized automotive fluid loading and unloading arm oil-gas recovery sealing device as described in any one of claims 2 to 5, characterized in that, A shock-absorbing structure is installed on the bottom of the flange, and the shock-absorbing structure is arranged opposite to the sealing cap.

7. The cylinder-pressing type automotive fluid loading and unloading arm oil-gas recovery sealing device as described in claim 6, characterized in that, The damping structure includes a retaining ring, which is sleeved on the outside of the vertical pipe and slides with the vertical pipe; the retaining ring is located directly below the flange, and the retaining ring and the flange are connected by multiple damping springs, which are arranged at intervals around the circumference of the vertical pipe, and the damping springs are sleeved on the outside of the bolts on the flange; the retaining ring has multiple transition holes for the bolts to pass through and extend into.

8. The cylinder-pressing type automotive fluid loading and unloading arm oil-gas recovery sealing device as described in claim 7, characterized in that, A buffer washer is installed on the top of the movable disk, and the buffer washer is arranged opposite to the retaining ring.

9. The cylinder-pressurized automotive fluid loading and unloading arm oil-gas recovery sealing device as described in any one of claims 2 to 5, characterized in that, The bottom of the conical sealing sleeve extends downward to form an elastically deformable inner sealing band. The inner sealing band is arranged around the bottom of the conical sealing sleeve and is arranged in an arc shape outward. A deformable inner cavity is opened inside the conical sealing sleeve. The bottom of the deformable inner cavity extends into the inner sealing band. The deformable inner cavity is arranged around the circumference of the oil and gas guide cavity and is arranged in isolation from the oil and gas guide cavity. An elastically deformable airbag pad layer is provided on the outer wall of the conical sealing sleeve. The airbag pad layer is arranged around the circumference of the conical sealing sleeve and is filled with gas. The bottom of the airbag pad layer extends toward the inner sealing strip to form an inner sealing airbag layer. An elastically deformable inner abutment sealing strip is formed around the outer wall of the inner sealing strip. The inner abutment sealing strip is arranged in an arc shape facing upwards. The inner wall of the inner abutment sealing strip abuts against the bottom of the inner sealing airbag layer. The inner abutment sealing strip is located below the conical sealing sleeve. As the sealing cap moves towards the can opening to seal, the inner sealing strip, carrying the inner sealing airbag layer, first enters the can opening. The pressing cylinder, through the lifting frame, drives the airbag pad layer of the conical sealing sleeve to press against the top edge of the can opening. During the compression of the airbag pad layer and the conical sealing sleeve, the outer wall of the conical sealing sleeve is recessed towards the deformed inner cavity. The lower part of the inner sealing strip drives the inner sealing airbag layer to swing towards the bottom inner edge of the can opening. The gas in the airbag pad layer flows towards the inner sealing airbag layer, causing the inner sealing airbag layer to expand and seal along the bottom inner edge of the can opening, achieving a double sealing effect.

10. The cylinder-pressing type automotive fluid loading and unloading arm oil-gas recovery sealing device as described in claim 9, characterized in that, A fixing rod is provided at the bottom of the sealing cover plate, the fixing rod is located in the deformable inner cavity, and a linkage rod is hinged to the bottom of the fixing rod. A swing rod is hinged to the end of the linkage rod away from the fixing rod, and a guide rod is slidably connected to the swing rod. The top of the guide rod is fixedly connected to the bottom of the sealing cover plate. The linkage rod is arranged in an inclined shape, and the lower part of the linkage rod is connected to the bottom of the sealing cover plate by a return spring. The return spring is sleeved on the outside of the guide rod. The swing rod is provided with a guide groove, which extends along the length of the swing rod. A fixed guide head is provided at the bottom of the guide rod, and the guide rod slides in cooperation with the guide groove of the swing rod through the fixed guide head. The bottom of the swing rod bends and extends toward the bottom of the deformable inner cavity. When the airbag cushion layer and the conical sealing sleeve are compressed, the outer wall of the conical sealing sleeve is concave towards the deformed inner cavity, the lower part of the linkage rod is compressed and moves upward, the lower part of the linkage rod drives the swing rod to move upward, the lower part of the swing rod drives the inner sealing strip to swing outward, and the inner sealing strip drives the inner sealing airbag layer to seal along the bottom inner edge of the can opening, achieving a double sealing effect.

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