Fuel tank cover assembly

Abstract

The present invention discloses a fuel tank cover assembly, comprising a cover body and an oil filling pipe; a pressure ring is arranged in the accommodating cavity; a dust removal baffle channel and an oil condensation baffle channel are also arranged on the outer side of the accommodating cavity. The present invention constructs a specific dust removal baffle channel and an oil condensation baffle channel structure on the outer side of the oil filling pipe. When the internal pressure of the fuel tank is higher than the external environment pressure, the high-pressure gas in the fuel tank tends to overflow outward, and the overflowing gas first enters the oil condensation baffle channel. In the channel, due to the special design of the channel structure and its internal surface characteristics, the oil component in the gas condenses under the action of baffles, collisions, etc., thereby realizing the collection of oil and avoiding the waste and pollution caused by the direct overflow of oil with the gas. The gas after the oil condensation treatment is discharged outward, which effectively reduces the emission of oil vapor.

Description

Technical Field

[0001] The invention relates to the technical field of fuel tank cover plates, and in particular to a fuel tank cover plate assembly. Background Art

[0002] As a fuel storage device, the fuel tank must reduce the overpressure generated under dual working pressure conditions by means of a hole structure or a safety valve. The main function of the traditional fuel tank cap is to seal the fuel tank to prevent fuel leakage. However, during the use of fuel, as the amount of fuel in the tank gradually decreases, the air pressure inside the tank decreases accordingly. Since the traditional tank cap does not have an air intake function, the air pressure in the tank continues to decrease. Under the negative pressure, the fuel tank is at risk of being sucked flat. Conversely, when the air pressure in the fuel tank increases, the tank expands due to the increase in internal pressure. If the pressure exceeds the bearing limit of the tank material, it will cause cracks in the tank wall, leading to safety hazards such as fuel leakage, posing a serious threat to the stability and safety of the entire fuel system.

[0003] In the prior art, for example, a Chinese invention patent application with publication number CN106585367A discloses a fuel tank cap, wherein a threaded section is provided at the lower end of the fuel tank cap, a cavity is formed on the threaded section, and a ventilation device is provided in the cavity. When the ventilation valve of the fuel tank is blocked, the connection between the fuel tank and the outside atmosphere can be controlled by the ventilation device, and the pressure between the fuel tank and the outside is regulated by the ventilation device, that is, when the pressure in the fuel tank is higher than the design pressure of the fuel tank, the excess pressure is discharged to the outside through the ventilation device, and when the pressure in the fuel tank is lower than the outside pressure due to the oil being drawn out of the fuel tank, air is introduced from the outside through the ventilation device.

[0004] In the pressure relief mechanism of the fuel tank cap, the pressure relief process directly builds a connecting channel between the inner cavity of the fuel tank and the external environment. This connection method causes the oil vapor in the fuel tank to escape to the outside world under the drive of the pressure difference, which in turn causes energy loss. From the professional perspective of energy conservation and fuel efficiency, this kind of oil vapor leakage without effective treatment undoubtedly reduces the effective utilization rate of fuel and causes unnecessary energy waste.

[0005] At the same time, when the internal pressure of the fuel tank is lower than the external environmental pressure, the fuel tank cap will passively introduce external air into the fuel tank. However, due to the lack of effective air filtration and purification, dust particles carried in the external air will enter the fuel tank. After these dust impurities are mixed with the fuel, they will change the physical and chemical properties of the fuel, increase the impurity content in the fuel, and thus cause the fuel to be contaminated. From the perspective of fuel quality control and engine operation reliability, fuel contamination may cause a series of problems such as incomplete engine combustion and fuel injector clogging, which will seriously affect the normal operation and performance of the engine and reduce the working efficiency and stability of the entire power system. Summary of the invention

[0006] In view of the problems of the prior art, a fuel tank cover assembly is provided. By arranging a dust removal deflection channel and an oil condensation deflection channel on the outer side of the oil filling pipe, when the pressure inside the fuel tank is higher than the external pressure, the overflowing gas can pass through the oil condensation deflection channel and then be discharged to the outside. In this process, the oil can be collected. At the same time, when the internal pressure of the fuel tank is lower than the external pressure, the external space passes through the dust removal deflection channel and then enters the fuel tank, thereby preventing dust from contaminating the fuel tank. This solves the problem that the existing fuel tank cover is unable to ensure that the oil does not overflow while maintaining the fuel tank pressure and that dust contaminates the oil.

[0007] In order to solve the problems of the prior art, the present invention provides a fuel tank cover assembly, which is installed on the fuel tank and is characterized in that it includes a cover body and an oil filling pipe arranged on the cover body; a placement cavity extending along the axial direction thereof is formed outside the oil filling pipe, the top end of the placement cavity is closed, and the bottom end of the placement cavity is connected to the inner cavity of the fuel tank; a pressure ring sliding along the axial direction thereof is arranged in the placement cavity, and the pressure ring has a first position and a second position in the placement cavity, the placement cavity is provided with an inner connecting hole connected to the inner cavity of the fuel tank, an outer air inlet connected to the outside of the fuel tank, and an outer air outlet connected to the outside of the fuel tank, a dust removal baffle channel connected to the outer air inlet is also arranged on the outer side of the placement cavity, and a condensate baffle channel connected to the outer air outlet is also arranged on the outer side of the placement cavity; when the pressure ring slides to the first position, the inner connecting hole is connected to the outer air inlet, and air enters the fuel tank after passing through the dust removal baffle channel; when the pressure ring slides to the second position, the inner connecting hole is connected to the outer air outlet, and the gas in the fuel gas is discharged into the atmosphere after passing through the condensate baffle channel.

[0008] Preferably, a dust removal plate that can move downward is provided at the bottom end of the dust removal deflection channel, and a dust removal slope is provided at the top end of the dust removal plate, and the dust removal slope constitutes the bottom end of the dust removal deflection channel. The dust removal plate is transmission connected to the pressure ring. When the pressure ring moves upward, the dust removal plate moves downward relative to the dust removal deflection channel.

[0009] Preferably, a condensing plate capable of moving downward is provided at the bottom end of the condensing oil baffle channel, and a reflux slope is provided at the top end of the condensing oil plate, and the reflux slope constitutes the bottom end of the condensing oil baffle channel. A reflux hole connected to the inner cavity of the fuel tank is also provided on the accommodating cavity, and the condensing oil plate is transmission-connected with the pressure ring. When the inner cavity pressure of the fuel tank is not less than the rated value, the condensing oil plate blocks the reflux hole toward the inner side of the oil filling pipe, and when the pressure ring moves downward, the condensing oil plate moves downward relative to the condensing oil baffle channel to connect the condensing oil baffle channel with the reflux hole.

[0010] Preferably, the assembly also includes a fixing ring, which is coaxially and fixedly arranged outside the oil filling pipe, and the bottom end of the fixing ring is provided with an inner cylinder and an outer cylinder coaxial therewith, the inner connecting hole is distributed on the inner cylinder along the circumference of the oil filling pipe, and a fluid channel is formed between the inner wall of the inner cylinder and the outer wall of the oil filling pipe; the outer air inlet hole, the outer air outlet hole and the reflux hole are all distributed on the outer cylinder along the circumference of the oil filling pipe and are arranged in sequence from top to bottom; the pressure ring is slidably sleeved between the outer cylinder and the inner cylinder, the inner wall of the pressure ring is provided with a connecting ring groove that can be connected with the inner connecting hole, and the outer wall of the pressure ring is provided with an air inlet ring groove that can be connected with the outer air inlet hole and an air outlet ring groove that can be connected with the air outlet hole, and the air inlet ring groove and the air outlet ring groove are both connected with the connecting ring groove.

[0011] Preferably, the bottom end of the pressure ring is conical.

[0012] Preferably, the top of the pressure ring is provided with connecting columns distributed along its circumference, the top of the connecting columns slides through the fixed ring and is provided with a limit ring, an upper elastic reset element is provided between the limit ring and the fixed ring, and a lower elastic reset element is provided between the fixed ring and the pressure ring.

[0013] Preferably, an upper positioning ring and a lower positioning ring are provided on the inner wall of the outer cylinder, and the pressure ring is located between the upper positioning ring and the lower positioning ring.

[0014] Preferably, a dust removal deflector is also provided on the outside of the accommodating cavity, and a dust removal deflector cylinder coaxial with and concentrically distributed with the oil filling pipe is provided in the inner cavity of the dust removal deflector, and the dust removal deflector channel is formed between adjacent dust removal deflector cylinders, and a dust discharge plate is abutted against the bottom end of the dust removal deflector cylinder; an upper actuator rod is provided through the top end of the dust removal deflector, and the upper actuator rod is distributed along the circumference of the dust removal deflector, and the bottom end of the upper actuator rod is connected to the dust discharge plate; an oil pressure ring is provided on the top end of the fixing ring, and a An execution chamber and a trigger chamber are interconnected, an execution ring capable of moving in a vertical direction is arranged in the execution chamber, the top end of the upper execution rod passes through the oil pressure ring and is connected to the execution ring, a trigger ring capable of moving in its axial direction is arranged in the trigger chamber, an upper trigger rod extending downward to the top of the pressure ring is arranged at the bottom end of the trigger ring, the upper trigger rod is distributed along the circumference of the upper trigger ring, and the top of the trigger ring and the execution ring are filled with hydraulic oil; a stop ring is arranged on the upper trigger rod, and an upper elastic return element is arranged between the stop ring and the fixed ring.

[0015] Preferably, a condensate deflector is also provided on the outer side of the accommodating cavity, and the inner cavity of the condensate deflector is provided with a condensate deflector cylinder which is coaxial and concentrically distributed with the oil filling pipe, and the condensate deflector channel is formed between adjacent condensate deflector plates, and the condensate plate is abutted against the bottom end of the condensate deflector cylinder, and the outer wall of the condensate deflector is provided with an external exhaust port; a ring seat is provided at the bottom end of the outer cylinder, and a lower actuator rod is provided at the bottom end of the condensate plate to penetrate it, and the lower actuator rod is distributed along the circumference of the oil filling pipe, and the bottom end of the lower actuator rod slides through the ring seat and the cover plate body, and a transmission ring is provided at the bottom end of the lower actuator rod, and the inner wall of the transmission ring is provided with a lower trigger rod distributed along the circumference thereof, and the top end of the lower trigger rod extends to the bottom of the pressure ring; a lower elastic return element is provided between the condensate plate and the ring seat.

[0016] Preferably, the outer wall of the condensate deflector is provided with external exhaust ports distributed along its circumference, the top of the condensate plate is provided with a sealing cylinder that is sealingly and slidingly matched with the inner wall of the condensate deflector, and the sealing cylinder is provided with internal exhaust ports distributed along its circumference. When the condensate plate abuts against the bottom end of the condensate deflector cylinder, the external exhaust port is connected with the internal exhaust port.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present application constructs a specific dust removal baffle channel and an oil condensation baffle channel structure on the outside of the oil filling pipe. When the internal pressure of the oil tank is higher than the external environmental pressure, the high-pressure gas in the oil tank tends to overflow. At this time, the overflowing gas first enters the oil condensation baffle channel. In this channel, due to the special design of the channel structure and its internal surface characteristics, the oil components in the gas condense under the effects of baffles, collisions, etc., thereby realizing the collection of oil and avoiding the waste and pollution caused by the direct overflow of oil with the gas. The gas after the oil condensation treatment is then discharged to the outside, effectively reducing the emission of oil vapor.

[0019] When the pressure inside the fuel tank is lower than the external pressure, the external air tries to enter the fuel tank driven by the pressure difference. The air first enters the dust removal baffle channel, causing the dust particles in the air to collide with the channel wall during the baffle process, thereby achieving dust removal and purification of the air. The air after dust removal then enters the fuel tank, effectively preventing the fuel pollution problem caused by dust entering the fuel tank with the air.

[0020] At the same time, when the pressure ring in the placement cavity moves upward to connect the inner connection hole and the outer exhaust hole, the dust discharge plate at the bottom of the dust removal baffle channel can move downward to discharge the dust accumulated in the dust removal baffle channel. This achieves the cleaning and discharge function of the dust accumulated in the dust removal baffle channel, ensures the continuous and effective dust removal performance of the dust removal baffle channel, and maintains the cleanliness and stable operation of the fuel tank system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a three-dimensional diagram of a fuel tank cover assembly.

[0022] Figure 2 The present invention is a three-dimensional cross-sectional view of a fuel tank cover assembly.

[0023] Figure 3 It is a schematic diagram of a fuel tank cover plate assembly of the present invention when the fuel tank pressure is consistent with the external pressure.

[0024] Figure 4 yes Figure 3 A partial enlarged view of point A.

[0025] Figure 5 yes Figure 3 A partial enlarged view of point B.

[0026] Figure 6 yes Figure 3 A partial enlarged view of point C.

[0027] Figure 7 It is a stereoscopic view of a pressure ring in a fuel tank cover assembly of the present invention at a first viewing angle.

[0028] Figure 8 It is a stereoscopic view of a pressure ring in a fuel tank cover assembly of the present invention at a second viewing angle.

[0029] Fig. 9 The present invention discloses a three-dimensional exploded view of a dust removal deflector in a fuel tank cover assembly.

[0030] Fig.10 The present invention discloses a three-dimensional exploded view of an oil condensate baffle in a fuel tank cover assembly.

[0031] Fig.11 It is a schematic diagram of a fuel tank cover plate assembly of the present invention when the pressure inside the fuel tank is lower than the external pressure.

[0032] Fig.12 It is a schematic diagram of a fuel tank cover plate assembly of the present invention when the pressure inside the fuel tank is greater than the external pressure.

[0033] The numbers in the figure are: 1, cover body; 2, oil filling pipe; 31, placement cavity; 311, inner connecting hole; 312, outer air inlet hole; 313, outer air outlet hole; 32, pressure ring; 321, connecting ring groove; 322, air inlet ring groove; 323, air outlet ring groove; 324, connecting column; 3241, limit ring; 325, upper elastic reset element; 326, lower elastic reset element; 33, dust removal baffle; 331, dust removal baffle channel; 332, dust removal plate; 333, dust removal baffle cylinder; 334, upper actuator; 335, upper trigger rod; 3351, Stop ring; 337, executive ring; 338, trigger ring; 339, upper elastic return element; 34, condensate deflector; 341, condensate deflection channel; 342, condensate plate; 3421, sealing cylinder; 3422, inner exhaust port; 343, condensate deflection cylinder; 344, lower executive rod; 345, transmission ring; 346, lower trigger rod; 347, lower elastic return element; 348, outer exhaust port; 51, fixing ring; 511, inner cylinder; 512, outer cylinder; 521, upper positioning ring; 522, lower positioning ring; 523, reflux hole; 52, oil pressure ring. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, the present application provides a fuel tank cover assembly, which is installed on the fuel tank and is characterized in that it includes a cover body 1 and a fuel injection pipe 2 arranged on the cover body 1; a placement cavity 31 extending along its axial direction is formed outside the fuel injection pipe 2, the top end of the placement cavity 31 is closed, and the bottom end of the placement cavity 31 is connected to the inner cavity of the fuel tank; a pressure ring 32 sliding along its axial direction is arranged in the placement cavity 31, and the pressure ring 32 has a first position and a second position in the placement cavity 31, and the placement cavity 31 is provided with an inner connecting hole 311 communicating with the inner cavity of the fuel tank and an outer air inlet hole communicating with the outside of the fuel tank. 312 and an outgoing air hole 313 connected to the outside of the fuel tank, the outer side of the accommodating cavity 31 is also provided with a dust removal deflection channel 331 connected to the external air inlet hole 312, and the outer side of the accommodating cavity 31 is also provided with a condensate deflection channel 341 connected to the outgoing air hole 313; when the pressure ring 32 slides to the first position, the inner connecting hole 311 is connected to the external air inlet hole 312, and the air enters the fuel tank after passing through the dust removal deflection channel 331; when the pressure ring 32 slides to the second position, the inner connecting hole 311 is connected to the outgoing air hole 313, and the gas in the fuel gas is discharged into the atmosphere after passing through the condensate deflection channel 341.

[0036] When the pressure ring 32 moves to the first position, the pressure ring 32 moves downward, and the pressure inside the fuel tank is lower than the pressure outside the fuel tank.

[0037] When the pressure ring 32 moves to the second position, the pressure ring 32 moves upward, and the pressure inside the fuel tank is greater than the pressure outside the fuel tank.

[0038] The outer wall of the oil filling pipe 2 is provided with a placement cavity 31 extending in the vertical direction, the top of which is closed, while the bottom is connected to the inner cavity of the fuel tank. Inside the placement cavity 31, a pressure ring 32 that can slide in the vertical direction is provided, and the wall surface of the placement cavity 31 is provided with an inner connection hole 311, an outer air inlet hole 312, and an outer air outlet hole 313. When the pressure ring 32 slides in the placement cavity 31, it can guide the inner connection hole 311 to communicate with the outer air inlet hole 312, and can also guide the inner connection hole 311 to communicate with the outer air outlet hole 313.

[0039] On the outside of the housing chamber 31, a dust removal baffle channel 331 is additionally constructed to communicate with the external air inlet hole 312. When the internal pressure of the fuel tank is lower than the rated value, such as Fig.11 As shown, the pressure ring 32 moves downward when the pressure at its bottom decreases, so that the inner connecting hole 311 is connected with the outer air inlet 312. Driven by the pressure difference, the outside air first enters the dust removal baffle channel 331. Multiple baffles are arranged inside the dust removal baffle channel 331, so that the air undergoes multiple baffles and turns in the channel. In this process, the dust particles carried in the air collide with the baffles due to inertia and are intercepted. The purified air then enters the fuel tank through the outer air inlet 312 and the inner connecting hole 311 connected thereto, thereby effectively preventing dust and impurities from entering the fuel tank and polluting the fuel.

[0040] The outer side of the housing chamber 31 is also provided with a condensate baffle channel 341 communicating with the outgoing gas hole 313. When the internal pressure of the gas box is greater than the rated value, such as Fig.12 As shown, the pressure ring 32 moves upward when the pressure at its bottom increases, so that the inner connection hole 311 is connected with the outgoing air hole 313, and the oil-gas mixture in the fuel tank first enters the condensing oil baffle channel 341 under the action of pressure. When the oil-gas mixture flows in the channel, due to the temperature reduction and multiple collisions and baffles with the channel wall, the oil components therein are condensed and precipitated to form liquid oil droplets and gather at the bottom of the condensing oil baffle channel 341, and the gas after the condensing oil treatment is discharged into the atmosphere through the outgoing air hole 313, thereby realizing the recycling of fuel, reducing the loss and volatile emission of fuel, and improving the environmental protection and economy of the fuel system.

[0041] like Figure 5As shown, the bottom end of the dust removal deflection channel 331 is provided with a dust removal plate 332 that can move downward, and the top of the dust removal plate 332 is provided with a dust removal slope, which constitutes the bottom end of the dust removal deflection channel 331. The dust removal plate 332 is transmission-connected with the pressure ring 32. When the pressure ring 32 moves upward, the dust removal plate 332 moves downward relative to the dust removal deflection channel 331.

[0042] In the structural system of the fuel tank cover assembly, a dust removal plate 332 is mounted at the bottom end of the dust removal deflection channel 331, and the dust removal plate 332 has the ability to move downward in the vertical direction.

[0043] The top of the dust exhaust plate 332 is constructed with a dust exhaust slope, which constitutes the bottom end boundary portion of the dust removal deflection channel 331 in the overall structural layout.

[0044] A transmission connection mechanism is established between the dust discharge plate 332 and the pressure ring 32. When the pressure ring 32 moves upward in the vertical direction under certain working conditions, based on the transmission connection relationship between the two, the dust discharge plate 332 will move downward in the vertical direction relative to the dust removal baffle channel 331. The upward movement of the pressure ring 32 will push the dust discharge plate 332 to move downward, thereby achieving the function of cleaning and discharging the dust accumulated in the dust removal baffle channel 331, ensuring the continuous and effective dust removal performance of the dust removal baffle channel 331, and maintaining the cleanliness and stable operation of the fuel tank system.

[0045] like Figure 6 As shown, the bottom end of the condensed oil baffle channel 341 is provided with a condensed oil plate 342 that can move downward, and the top end of the condensed oil plate 342 is provided with a reflux slope, which constitutes the bottom end of the condensed oil baffle channel 341. The accommodating cavity 31 is also provided with a reflux hole 523 connected with the inner cavity of the fuel tank. The condensed oil plate 342 is transmission-connected with the pressure ring 32. When the inner cavity pressure of the fuel tank is not less than the rated value, the condensed oil plate 342 blocks the reflux hole 523 toward the inner side of the fuel filling pipe 2. When the pressure ring 32 moves downward, the condensed oil plate 342 moves downward relative to the condensed oil baffle channel 341 to connect the condensed oil baffle channel 341 with the reflux hole 523.

[0046] The bottom end of the condensed oil baffle channel 341 is equipped with an oil condensed plate 342 that can move in a vertical downward direction. The top of the oil condensed plate 342 is designed with a reflux slope, which structurally constitutes the bottom end of the condensed oil baffle channel 341 and plays a key role in guiding and converging the flow of oil and gas in the channel and the condensation process. A reflux hole 523 that is interconnected with the inner cavity of the fuel tank is also provided at the placement cavity 31. This reflux hole 523 serves as a passage for oil and gas reflux during the pressure change inside the fuel tank. A specific transmission connection relationship is established between the oil condensed plate 342 and the pressure ring 32.

[0047] When the inner cavity pressure of the fuel tank is not less than the rated value, the oil condensing plate 342 always blocks the reflux hole 523, which can effectively prevent the oil and gas from directly overflowing through the reflux hole 523 under high pressure.

[0048] When the pressure ring 32 moves downward in the vertical direction due to the change of the internal pressure of the fuel tank, based on the transmission connection mechanism between the condensing plate 342 and the pressure ring 32, the condensing plate 342 will move downward relative to the condensing oil baffle channel 341. In this process, as the condensing plate 342 moves downward, the top of the reflux slope will gradually form a communication state with the reflux hole 523. At this time, the oil that has been fully condensed by the condensing oil baffle channel 341 can smoothly flow back to the inner cavity of the fuel tank through the reflux hole 523 along the reflux slope under the action of gravity and residual air pressure difference, so as to realize the effective recovery and reuse of the oil and avoid unnecessary loss and volatilization of the oil.

[0049] like Figure 3 , Fig.11 and Fig.12 As shown, the assembly also includes a fixing ring 51, which is coaxially fixedly arranged outside the oil filling pipe 2. The bottom end of the fixing ring 51 is provided with an inner cylinder 511 and an outer cylinder 512 coaxial therewith. The inner connecting hole 311 is distributed on the inner cylinder 511 along the circumference of the oil filling pipe 2, and a fluid channel is formed between the inner wall of the inner cylinder 511 and the outer wall of the oil filling pipe 2; the outer air inlet hole 312, the outgoing air hole 313 and the reflux hole 523 are all distributed on the outer cylinder 511 along the circumference of the oil filling pipe 2. 2 and are arranged in sequence from top to bottom; the pressure ring 32 is slidably sleeved between the outer cylinder 512 and the inner cylinder 511, the inner wall of the pressure ring 32 is provided with a connecting ring groove 321 which can be communicated with the inner connecting hole 311, and the outer wall of the pressure ring 32 is provided with an air inlet ring groove 322 which can be communicated with the outer air inlet hole 312 and an air outlet ring groove 323 which can be communicated with the outgoing air hole 313, and the air inlet ring groove 322 and the air outlet ring groove 323 are both communicated with the connecting ring groove 321.

[0050] At the bottom end of the fixed ring 51, there are coaxial inner cylinder 511 and outer cylinder 512 structures. The inner connecting holes 311 are evenly distributed on the inner cylinder 511 along the circumference of the oil injection pipe 2 according to a specific layout design. At the same time, a fluid channel with a specific fluid transmission function is formed between the inner wall of the inner cylinder 511 and the outer wall of the oil injection pipe 2, and the fluid channel provides a necessary path for the directional flow of oil and gas and pressure conduction.

[0051] The outer air inlet 312, the outgoing air hole 313 and the return hole 523 are orderly distributed on the outer cylinder 512 structure along the circumference of the oil filling pipe 2. Moreover, the three are arranged in a bottom-up order in terms of spatial position. This arrangement is closely related to the pressure change mechanism and oil and gas flow law inside the fuel tank, ensuring that the processes of air intake, oil and gas discharge and oil reflux can be carried out in an orderly manner under different pressure conditions.

[0052] The pressure ring 32 is precisely placed in a coaxial form in the annular space defined by the inner wall of the outer tube 512 and the outer wall of the inner tube 511. A connecting ring groove 321 structure is designed on the inner wall of the pressure ring 32. The connecting ring groove 321 has the functional characteristics of establishing a communication relationship with the inner connecting hole 311, thereby realizing fluid interaction and pressure conduction between the pressure ring 32 and the inner tube 511. An air inlet ring groove 322 and an air outlet ring groove 323 are respectively provided on the outer wall of the pressure ring 32, wherein the air inlet ring groove 322 can be connected with the outer air inlet hole 312, and the air outlet ring groove 323 can be connected with the outer air hole 313. The air inlet ring groove 322 and the air outlet ring groove 323 both build a communication passage with the connecting ring groove 321.

[0053] like Figure 7 and Figure 8 As shown, the bottom end of the pressure ring 32 is conical.

[0054] The increased force-bearing area makes the pressure distribution of the oil-gas mixture on the pressure ring 32 more uniform. When the oil-gas molecules hit the pressure ring 32, the impact force per unit area is reduced due to the increase in the force-bearing area, thereby reducing the risk of local stress concentration and ensuring the structural stability and reliability of the pressure ring 32 in the process of enduring the oil-gas pressure shock for a long time.

[0055] like Figure 3 As shown, the top of the pressure ring 32 is provided with connecting columns 324 distributed along its circumference, the top of the connecting column 324 slides through the fixed ring 51 and is provided with a limiting ring 3241, an upper elastic reset element 325 is provided between the limiting ring 3241 and the fixed ring 51, and a lower elastic reset element 326 is provided between the fixed ring 51 and the pressure ring 32.

[0056] Under normal working conditions, when the pressure ring 32 is displaced upward due to the change in the pressure in the oil tank, the connecting column 324 moves upward accordingly, and the lower elastic reset element 326 will be compressed to store elastic potential energy. Once the pressure factor causing the pressure ring 32 to move upward disappears, the elastic potential energy stored in the lower elastic reset element 326 will be quickly converted into kinetic energy, pushing the connecting column 324 and the pressure ring 32 to reset downward, so that they return to the initial equilibrium position or a reasonable range close to the initial position, thereby ensuring that the pressure ring 32 can always remain in a relatively stable and adjustable working state range during the dynamic change of the oil tank pressure.

[0057] When the pressure ring 32 moves downward, the upper elastic reset element 325 will be compressed and store elastic potential energy. When the driving force for the pressure ring 32 to move downward disappears, the upper elastic reset element 325 releases the elastic potential energy and pushes the pressure ring 32 to reset upward. Regardless of the upward or downward displacement change, it can quickly return to a reasonable working position under the action of the elastic force, thereby accurately responding to the change in the pressure in the oil tank. By working in coordination with other related components such as the inner connection hole 311, the outer air inlet hole 312, the outer air outlet hole 313, etc., it effectively maintains a stable balance of the pressure in the oil tank.

[0058] like Figure 3 As shown, an upper positioning ring 521 and a lower positioning ring 522 are provided on the inner wall of the outer cylinder 512 , and the pressure ring 32 is located between the upper positioning ring 521 and the lower positioning ring 522 .

[0059] In normal operation, the pressure ring 32 performs axial reciprocating motion in the space defined by the upper positioning ring 521 and the lower positioning ring 522 according to the fluctuation of the pressure in the oil tank. When the pressure in the oil tank increases, the pressure ring 32 moves upward under the push of the air pressure. At this time, the upper positioning ring 521 plays a blocking and limiting role, preventing the pressure ring 32 from deviating from the predetermined motion track and causing the entire pressure regulation system to fail; conversely, when the pressure in the oil tank decreases, the pressure ring 32 moves downward, and the lower positioning ring 522 assumes the function of limiting its excessive downward movement, ensuring that the pressure ring 32 is always in the effective working area.

[0060] like Figure 3 , Figure 4 , Figure 5 and Fig. 9As shown, a dust removal deflector 33 is also provided on the outer side of the accommodating cavity 31, and a dust removal deflector cylinder 333 coaxially and concentrically distributed with the oil filling pipe 2 is provided in the inner cavity of the dust removal deflector 33, and the dust removal deflector channel 331 is formed between adjacent dust removal deflector cylinders 333, and a dust discharge plate 332 is abutted against the bottom end of the dust removal deflector cylinder 333; an upper actuator rod 334 is provided through the top end of the dust removal deflector 33, and the upper actuator rod 334 is distributed along the circumference of the dust removal deflector 33, and the bottom end of the upper actuator rod 334 is connected to the dust discharge plate 332; an oil pressure ring 52 is provided on the top end of the fixing ring 51, and the inner cavity of the oil pressure ring 52 is provided with mutually connected An execution chamber and a trigger chamber are connected, an execution ring 337 capable of moving in a vertical direction is provided in the execution chamber, the top end of the upper execution rod 334 passes through the oil pressure ring 52 and is connected to the execution ring 337, a trigger ring 338 capable of moving along its axial direction is provided in the trigger chamber, an upper trigger rod 335 extending downward to the top of the pressure ring 32 is provided at the bottom end of the trigger ring 338, the upper trigger rod 335 is distributed along the circumference of the upper trigger ring 338, and the tops of the trigger ring 338 and the execution ring 337 are filled with hydraulic oil; a stop ring 3351 is provided on the upper trigger rod 335, and an upper elastic return element 339 is provided between the stop ring 3351 and the fixed ring 51.

[0061] The hydraulic oil is sealed in the oil pressure ring to prevent it from leaking.

[0062] The top end of the dust removal deflector 33 is equipped with upper actuator rods 334 that penetrate the structure, and these upper actuator rods 334 are evenly distributed along the circumference of the dust removal deflector 33.

[0063] A hydraulic ring 52 is arranged at the top of the fixed ring 51, and the inner cavity of the hydraulic ring 52 is designed with an execution cavity and a trigger cavity that are interconnected. An execution ring 337 that can move in the vertical direction is arranged inside the execution cavity. The shape of the execution ring 337 maintains a good matching accuracy with the inner wall of the execution cavity. The top of the upper execution rod 334 passes through the hydraulic ring 52 and is firmly connected to the execution ring 337, so that under specific working conditions, the movement state of the dust removal plate 332 can be organically linked with the action of the execution ring 337.

[0064] The trigger chamber is provided with a trigger ring 338 that can move in the vertical direction. The bottom end of the trigger ring 338 is connected to an upper trigger rod 335 extending downward to the top of the pressure ring 32. These upper trigger rods 335 are evenly distributed along the circumference of the upper trigger ring 338 to ensure that the force or displacement signal can be evenly transmitted to the pressure ring 32 when the trigger ring 338 is actuated. Hydraulic oil is injected on the top of the trigger ring 338 and the actuator ring 337. Hydraulic oil plays a key role as a medium for transmitting pressure and power in the entire system. When the trigger ring 338 is displaced by a specific external force or pressure change, the hydraulic oil can quickly and evenly transmit this change to the actuator ring 337, thereby driving the upper actuator rod 334 and the dust exhaust plate 332 to perform corresponding actions.

[0065] A stop ring 3351 is provided on the upper trigger rod 335. Under normal working conditions, the upper elastic return element 339 applies a certain pre-tightening force to the upper trigger rod 335 to keep it in the initial stable position. When the trigger ring 338 is displaced due to a specific working condition, the upper trigger rod 335 moves accordingly, and the upper elastic return element 339 will be compressed or stretched to store elastic potential energy. Once the trigger condition disappears, the elastic potential energy stored in the upper elastic return element 339 will be converted into kinetic energy, driving the upper trigger rod 335 to return to the initial position, thereby ensuring that the entire trigger and execution system can maintain stable working performance and reliability in a dynamically changing working environment.

[0066] like Figure 3 , Figure 4 and Fig.10 As shown, the outer side of the placement chamber 31 is also provided with a condensate deflector 34, the inner cavity of the condensate deflector 34 is provided with a condensate deflector cylinder 343 coaxial and concentric with the oil injection pipe 2, the condensate deflector channel 341 is formed between adjacent condensate deflector plates, the condensate plate 342 is abutted against the bottom end of the condensate deflector cylinder 343, the outer wall of the condensate deflector 34 is provided with an outer exhaust port 348; the bottom end of the outer cylinder 512 is provided with a ring seat, the bottom of the condensate plate 342 is provided with a condensate deflector 343, and the outer wall of the condensate deflector 34 is provided with an outer exhaust port 348. A lower actuator rod 344 is provided at the end thereof and passes through the lower actuator rod 344. The lower actuator rod 344 is distributed along the circumference of the oil filling pipe 2. The bottom end of the lower actuator rod 344 slides through the ring seat and the cover plate body 1. A transmission ring 345 is provided at the bottom end of the lower actuator rod 344. The inner wall of the transmission ring 345 is provided with a lower trigger rod 346 distributed along its circumference. The top end of the lower trigger rod 346 extends to the bottom of the pressure ring 32. A lower elastic return element 347 is provided between the oil condensing plate 342 and the ring seat.

[0067] A ring seat is fixed at the bottom end of the outer cylinder 512. The bottom end of the condensing plate 342 is installed with a lower actuator rod 344 that penetrates its own structure. These lower actuator rods 344 are evenly distributed along the circumference of the oil filling pipe 2 to ensure uniformity and balance during the power transmission process. The bottom end of the lower actuator rod 344 is connected to a transmission ring 345. The inner wall of the transmission ring 345 is designed with lower trigger rods 346 evenly distributed along its circumference. The top of these lower trigger rods 346 extends to the bottom of the pressure ring 32. When the pressure ring 32 produces a displacement change, it can timely and accurately sense and transmit relevant motion information and force, thereby establishing a mechanical connection and action coordination mechanism between the pressure ring 32 and the condensing plate 342.

[0068] A lower elastic return element 347 is arranged between the condensing plate 342 and the ring seat. Under normal working conditions, the lower elastic return element 347 applies a certain pre-tightening force to the condensing plate 342 to maintain it in the initial stable position. When the pressure ring 32 is displaced due to the pressure change in the fuel tank, the condensing plate 342 will be displaced accordingly through the linkage of the lower trigger rod 346, the transmission ring 345 and the lower actuator rod 344. At this time, the lower elastic return element 347 will be compressed or stretched to store elastic potential energy. Once the displacement change of the pressure ring 32 stops or returns to the initial state, the elastic potential energy stored in the lower elastic return element 347 will be converted into kinetic energy, driving the condensing plate 342 to return to the original position, thereby ensuring that the oil reflux process in the condensing oil baffle channel 341 can be carried out continuously and stably under the dynamically changing fuel tank pressure environment, realizing efficient condensation of oil and gas and effective recycling of oil, maintaining the pressure balance of the fuel tank system and the stability of fuel quality, and improving the working efficiency and reliability of the entire fuel tank assembly.

[0069] like Figure 6 As shown, the outer wall of the condensate deflector 34 is provided with outer exhaust ports 348 distributed along its circumference, the top end of the condensate plate 342 is provided with a sealing cylinder 3421 which is sealingly and slidingly matched with the inner wall of the condensate deflector 34, and the sealing cylinder 3421 is provided with inner exhaust ports 3422 distributed along its circumference. When the condensate plate 342 abuts against the bottom end of the condensate deflector cylinder 343, the outer exhaust ports 348 are connected with the inner exhaust ports 3422.

[0070] The top of the condensing plate 342 is configured with a sealing cylinder 3421 that forms a sealing sliding fit with the inner wall of the condensing baffle 34. The sealing cylinder 3421 is provided with inner exhaust ports 3422 distributed along its circumference, and the layout of these inner exhaust ports 3422 is mutually related to the outer exhaust ports 348 and works in coordination.

[0071] When the condensing plate 342 abuts against the bottom end of the condensing oil baffle cylinder 343 under certain working conditions, the outer exhaust port 348 can be accurately connected to the inner exhaust port 3422 through precise structural design and position matching. This connection mechanism ensures that during the oil-gas condensation process, when the oil converges at the condensing plate 342, the remaining gas can flow out from the inner exhaust port 3422 in an orderly manner, pass through the gap between the sealing cylinder 3421 and the inner wall of the condensing oil baffle 34, and then be discharged through the outer exhaust port 348.

[0072] When the condensing plate 342 moves downward, the inner exhaust port 3422 and the outer exhaust port 348 are staggered to block the condensing oil deflection channel 341, ensuring that the oil and gas in the fuel tank will not overflow through the reflux hole 523 and the connected inner exhaust port 3422 and outer exhaust port 348.

[0073] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A fuel tank cover assembly, mounted on a fuel tank, characterized in that: It comprises a cover plate body (1) and an oil filling pipe (2) arranged on the cover plate body (1); The fuel injection pipe (2) is provided with a placement cavity (31) extending along its axial direction, the top end of the placement cavity (31) is closed, and the bottom end of the placement cavity (31) is communicated with the inner cavity of the fuel tank; The placement cavity (31) is provided with a pressure ring (32) that slides along its axial direction, and the pressure ring (32) has a first position and a second position in the placement cavity (31); the placement cavity (31) is provided with an inner connection hole (311) that communicates with the inner cavity of the fuel tank, an outer air inlet hole (312) that communicates with the outside of the fuel tank, and an outer air outlet hole (313) that communicates with the outside of the fuel tank; the outer side of the placement cavity (31) is also provided with a dust removal baffle channel (331) that communicates with the outer air inlet hole (312); and the outer side of the placement cavity (31) is also provided with a condensed oil baffle channel (341) that communicates with the outer air outlet hole (313); When the pressure ring (32) slides to the first position, the inner connecting hole (311) is connected to the outer air inlet hole (312), and the air passes through the dust removal baffle channel (331) and then enters the fuel tank; When the pressure ring (32) slides to the second position, the inner connecting hole (311) is connected to the outgoing gas hole (313), and the gas in the fuel gas passes through the condensate baffle channel (341) and is discharged into the atmosphere.

2. A fuel tank cover assembly according to claim 1, characterized in that: A dust discharge plate (332) capable of moving downward is provided at the bottom end of the dust removal baffle channel (331), and a dust discharge inclined surface is provided at the top end of the dust removal baffle channel (331). The dust discharge plate (332) is transmission-connected to the pressure ring (32), and when the pressure ring (32) moves upward, the dust discharge plate (332) moves downward relative to the dust removal baffle channel (331).

3. A fuel tank cover assembly according to claim 2, characterized in that: The bottom end of the condensed oil baffle channel (341) is provided with an condensed oil plate (342) that can move downwards. The top end of the condensed oil plate (342) is provided with a reflux slope, which constitutes the bottom end of the condensed oil baffle channel (341). The placement cavity (31) is also provided with a reflux hole (523) that is in communication with the inner cavity of the fuel tank. The condensed oil plate (342) is transmission-connected to the pressure ring (32). When the inner cavity pressure of the fuel tank is not less than a rated value, the condensed oil plate (342) blocks the reflux hole (523) toward the inner side of the fuel injection pipe (2). When the pressure ring (32) moves downwards, the condensed oil plate (342) moves downwards relative to the condensed oil baffle channel (341) so that the condensed oil baffle channel (341) is in communication with the reflux hole (523).

4. A fuel tank cover assembly according to claim 3, characterized in that: It also comprises a fixing ring (51), the fixing ring (51) being coaxially fixedly arranged outside the oil injection pipe (2), the bottom end of the fixing ring (51) being provided with an inner cylinder (511) and an outer cylinder (512) coaxial therewith, the inner connecting holes (311) being distributed on the inner cylinder (511) along the circumference of the oil injection pipe (2), and a fluid channel being formed between the inner wall of the inner cylinder (511) and the outer wall of the oil injection pipe (2); The external air inlet hole (312), the external air outlet hole (313) and the return hole (523) are respectively distributed on the outer cylinder (512) along the circumference of the oil filling pipe (2) and are arranged in sequence from top to bottom; The pressure ring (32) is slidably sleeved between the outer tube (512) and the inner tube (511); the inner wall of the pressure ring (32) is provided with a connecting ring groove (321) capable of communicating with the inner connecting hole (311); the outer wall of the pressure ring (32) is provided with an air inlet ring groove (322) capable of communicating with the outer air inlet hole (312) and an air outlet ring groove (323) capable of communicating with the outer air outlet hole (313); the air inlet ring groove (322) and the air outlet ring groove (323) are both in communication with the connecting ring groove (321).

5. A fuel tank cover assembly according to claim 4, characterized in that: The bottom end of the pressure ring (32) is in the form of a cone.

6. A fuel tank cover assembly according to claim 4 or 5, characterized in that: The top end of the pressure ring (32) is provided with connecting columns (324) distributed along its circumference, the top end of the connecting columns (324) slides through the fixing ring (51) and is provided with a limit ring (3241), an upper elastic reset element (325) is provided between the limit ring (3241) and the fixing ring (51), and a lower elastic reset element (326) is provided between the fixing ring (51) and the pressure ring (32).

7. A fuel tank cover assembly according to claim 6, characterized in that: An upper positioning ring (521) and a lower positioning ring (522) are provided on the inner wall of the outer cylinder (512), and the pressure ring (32) is located between the upper positioning ring (521) and the lower positioning ring (522).

8. A fuel tank cover assembly according to claim 4 or 5, characterized in that: A dust removal baffle (33) is further provided on the outside of the placement cavity (31); a dust removal baffle cylinder (333) coaxial with and concentrically distributed with the oil injection pipe (2) is provided in the inner cavity of the dust removal baffle cylinder (333); the dust removal baffle channel (331) is formed between adjacent dust removal baffle cylinders (333); and a dust discharge plate (332) is disposed in contact with the bottom end of the dust removal baffle cylinder (333); An upper actuator rod (334) is provided through the top end of the dust removal deflector (33), the upper actuator rod (334) is distributed along the circumference of the dust removal deflector (33), and the bottom end of the upper actuator rod (334) is connected to the dust removal plate (332); An oil pressure ring (52) is arranged at the top of the fixed ring (51), the oil pressure ring (52) is provided with an execution chamber and a trigger chamber which are connected to each other, an execution ring (337) which can move along its axial direction is arranged in the execution chamber, the top of the upper execution rod (334) passes through the oil pressure ring (52) and is connected to the execution ring (337), a trigger ring (338) which can move along its axial direction is arranged in the trigger chamber, an upper trigger rod (335) which extends downward to the top of the pressure ring (32) is arranged at the bottom of the trigger ring (338), the upper trigger rod (335) is distributed along the circumference of the upper trigger ring (338), and hydraulic oil is injected into the top of the trigger ring (338) and the execution ring (337); A stop ring (3351) is provided on the upper trigger rod (335), and an upper elastic return element (339) is provided between the stop ring (3351) and the fixing ring (51).

9. A fuel tank cover assembly according to claim 4 or 5, characterized in that: A condensed oil baffle (34) is also arranged outside the placement cavity (31); the inner cavity of the condensed oil baffle (34) is provided with a condensed oil baffle cylinder (343) coaxial with and concentrically distributed with the oil injection pipe (2); the condensed oil baffle channel (341) is formed between adjacent condensed oil baffle plates; the condensed oil plate (342) is arranged in contact with the bottom end of the condensed oil baffle cylinder (343); and the outer wall of the condensed oil baffle (34) is provided with an external exhaust port (348); A ring seat is provided at the bottom end of the outer cylinder (512), a lower actuator rod (344) is provided through the bottom end of the oil condensing plate (342), the lower actuator rod (344) is distributed along the circumference of the oil injection pipe (2), the bottom end of the lower actuator rod (344) slides through the ring seat and the cover plate body (1), a transmission ring (345) is provided at the bottom end of the lower actuator rod (344), the inner wall of the transmission ring (345) is provided with a lower trigger rod (346) distributed along the circumference thereof, and the top end of the lower trigger rod (346) extends to the bottom of the pressure ring (32); A lower elastic return element (347) is provided between the oil condensing plate (342) and the ring seat.

10. A fuel tank cover assembly according to claim 9, characterized in that: The outer wall of the condensate deflector (34) is provided with outer exhaust ports (348) distributed along its circumference, the top end of the condensate plate (342) is provided with a sealing cylinder (3421) that is sealingly slidably matched with the inner wall of the condensate deflector (34), and the sealing cylinder (3421) is provided with inner exhaust ports (3422) distributed along its circumference. When the condensate plate (342) abuts against the bottom end of the condensate deflector cylinder (343), the outer exhaust ports (348) are communicated with the inner exhaust ports (3422).

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