orvr vapor recovery vacuum pump

Abstract

This utility model provides an ORVR (Organic Gas Recovery) vacuum pump for oil and gas recovery, relating to the technical field of oil and gas recovery equipment in gas stations. It solves the technical problem of inconvenience in disassembling and assembling the entire pump body assembly from the motor in existing oil and gas recovery vacuum pumps. The device includes a motor, pump body, gas pushing structure, ORVR valve body, coupling, and coupling assembly. The pump body and gas pushing structure are connected at their midpoints via the coupling assembly, and their outer shells are connected. The extended end of the coupling assembly is connected to the output shaft of the motor via the coupling. The ORVR valve body is installed inside the pump body. The pump body is close to the motor, and an extension plate on the pump body is bolted to the motor's outer shell. There is a gap between the end face of the pump body and the end face of the motor, and the coupling is located within this gap. The coupling is a detachable structure.

Description

Technical Field

[0001] This utility model relates to the technical field of oil and gas recovery equipment for gas stations, and in particular to an ORVR oil and gas recovery vacuum pump. Background Technology

[0002] Onboard vapor recovery systems are a highly efficient control technology for reducing vapor pollution during refueling. By installing an activated carbon canister in the vehicle's fuel supply system, a liquid seal is formed within the narrow refueling line during refueling, preventing vapors from escaping. Simultaneously, vapors overflowing from the fuel tank during refueling are transported to the activated carbon canister through a vent valve and adsorbed, thus achieving vapor recovery and avoiding waste. The promotion and application of onboard vapor recovery systems are of great significance for reducing emissions from current vehicle fuel systems.

[0003] A secondary vapor recovery system refers to a technology that uses vacuum-assisted vapor recovery equipment to collect the vapors released during refueling and process them in an underground storage tank. This system utilizes the negative pressure generated by a vacuum pump to draw in the vapors generated during refueling through underground vapor recovery pipelines and return them to the underground storage tank, thereby reducing vapor release during refueling and preventing leaks into the atmosphere.

[0004] Currently, when the number of vehicles equipped with onboard vapor recovery systems exceeds 20%, gas stations should adopt vapor recovery refueling equipment compatible with onboard vapor recovery systems. That is, the secondary vapor recovery system should be able to identify vehicles with onboard vapor recovery systems, and when refueling vehicles with onboard vapor recovery systems, the vapor-liquid ratio should be reduced to below 0.5; when refueling vehicles without onboard vapor recovery systems, the vapor-liquid ratio should remain unchanged within the range of 1.0-1.2.

[0005] Therefore, the same oil vapor recovery vacuum pump is used in both the ORVR (On-board Vapor Recycling) system and the secondary oil vapor recovery system. The existing oil vapor recovery vacuum pump includes a motor and a pump body assembly. The output shaft of the motor is directly connected to the pump body assembly. Since the pump body assembly is composed of multiple unit components, it is inconvenient to disassemble and reassemble the entire pump body assembly from the motor. Each time disassembly and reassembly is required, each unit component on the pump body assembly must be disassembled in sequence, which causes the disassembly and reassembly operation to be cumbersome and inconvenient. Utility Model Content

[0006] The purpose of this utility model is to provide an ORVR oil and gas recovery vacuum pump to solve the technical problem that it is inconvenient to disassemble and assemble the entire pump body assembly and motor during the disassembly and assembly of existing oil and gas recovery vacuum pumps. The various technical effects of the preferred technical solutions provided by this utility model are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This utility model provides an ORVR oil and gas recovery vacuum pump, including a motor, a pump body, a gas pushing structure, an ORVR valve body, a coupling, and a coupling assembly. The pump body and the gas pushing structure are connected at their middle parts by the coupling assembly, and the outer shells of the pump body and the gas pushing structure are connected. The extended end of the coupling assembly is connected to the output shaft of the motor by the coupling assembly. The ORVR valve body is installed in the pump body. The pump body is close to the motor, and the extension plate on the pump body is connected to the housing of the motor by bolts. There is a gap between the end face of the pump body and the end face of the motor, and the coupling is located in the gap. Alternatively, the gas pushing structure is close to the motor, and the housing of the gas pushing structure is connected to the motor by bolts. There is a gap between the end face of the gas pushing structure and the end face of the motor, and the coupling is located in the gap. The coupling is a detachable structure.

[0009] Optionally, the coupling includes a first mating member, a second mating member, and a snap-fit ​​member. The first mating member is connected to the output shaft of the motor, the second mating member is connected to the coupling assembly, and the first mating member and the second mating member are snap-fitted together by the snap-fit ​​member.

[0010] Optionally, both the first and second docking components include a fixed disk, a snap-fit ​​block, a connecting sleeve, and a positioning block. The snap-fit ​​block is fixedly connected to the outer end area of ​​one end face of the fixed disk. There are multiple snap-fit ​​blocks, and all snap-fit ​​blocks are evenly distributed along the circumferential direction of the fixed disk. The connecting sleeve is fixedly connected to the central area of ​​the other end face of the fixed disk, and the connecting sleeve and the central area of ​​the fixed disk are internally connected. There are two positioning blocks, and the positioning blocks are fixed at the connection between the connecting sleeve and the fixed disk. A snap-fit ​​groove is provided on one end face of the fixed plate, and a process groove is provided on the other end face of the fixed plate; A countersunk hole is formed between the connecting sleeve and the fixed plate. Both the ends of the coupling and the output shaft of the motor are provided with threaded holes and positioning ports. The connecting sleeve can extend into the threaded hole, and the countersunk hole and the threaded hole are connected by bolts. The positioning block cooperates with the positioning port.

[0011] Optionally, the snap-fit ​​component includes a ring and a fixing block. There are multiple fixing blocks, and each fixing block is fixedly connected to the outer wall of the ring. All the fixing blocks are evenly distributed along the circumferential direction of the ring, and there is a positioning space between two adjacent fixing blocks. The snap-fit ​​block is connected to the positioning space.

[0012] Optionally, the coupling assembly includes a stepped shaft, an explosion-proof structure, a bearing structure, a spring, and a seal. There are two bearing structures, and one bearing structure, the explosion-proof structure, the other bearing structure, the spring, and the seal are all sequentially installed on the stepped shaft.

[0013] Optionally, the pump body is provided with an air intake channel, an air exhaust channel, a valve body channel, an air inlet hole, and an air outlet hole. The air intake channel and the air exhaust channel are connected through the valve body channel. The ORVR valve body is installed in the valve body channel and controls the opening and closing of the valve body channel. The air intake channel is connected to the gas pushing structure through the air inlet hole, and the air exhaust channel is connected to the gas pushing structure through the air outlet hole.

[0014] Optionally, an intake connector is provided at the port of the intake channel, and an exhaust connector is provided at the port of the exhaust channel. A flame arrester is installed on both the intake connector and the exhaust connector. The pump body is also provided with two maintenance channels. One maintenance channel is connected to the intake channel, and the other maintenance channel is connected to the exhaust channel. Maintenance bolts are installed in the maintenance channels.

[0015] Optionally, the gas pushing structure includes a cylinder liner, an end cover, a rotor, and blades. The cylinder liner is located between the end cover and the pump body. The end cover is connected to the pump body via a screw. The rotor and the blades are both located inside the cylinder liner. The rotor is connected to the output shaft of the motor and is eccentrically positioned. The rotor has multiple sliding grooves on its circumferential sidewalls, and there are multiple blades. Each blade corresponds to one of the sliding grooves and is slidably connected. Two adjacent blades, the rotor, and the cylinder liner form a closed cavity.

[0016] Optionally, the pump body is further provided with a long arc-shaped groove and a short arc-shaped groove on its end face. The long arc-shaped groove is connected to the air inlet hole, and the short arc-shaped groove is connected to the air outlet hole. The long arc-shaped groove and the short arc-shaped groove are respectively connected to closed cavities at different positions.

[0017] Optionally, the ORVR valve body includes a valve sleeve and a valve core, the valve core is located inside the valve sleeve and is slidably connected to the valve sleeve, the valve core can control the opening and closing of the valve sleeve, the valve sleeve is located inside the valve body channel and is threadedly connected to the valve body channel; The valve core includes a plug, a sealing ring, a spring, and a sliding member. The plug is inserted into the sliding member. The sealing ring is fitted on the plug. The spring is fitted on the sliding member, and both ends of the spring abut against the end of the sliding member and the limiting step inside the valve sleeve, respectively. The sliding member is slidably connected to the inner ring of the valve sleeve. The plug can block the port of the valve sleeve. A flow groove is provided on the axial side wall of the sliding member.

[0018] This utility model provides an ORVR oil and gas recovery vacuum pump. The pump body and the gas pushing structure are connected at the middle by a coupling assembly, and the outer shells of the pump body and the gas pushing structure are connected. The ORVR valve body is installed in the pump body. That is, the pump body, the gas pushing structure, the ORVR valve body, and the coupling assembly form a pump body assembly. The extended end of the coupling assembly is connected to the output shaft of the motor through a coupling. That is, the pump body assembly and the output shaft of the motor are connected through a coupling. The coupling is a detachable structure. By disassembling the coupling, the entire pump body assembly and the motor can be quickly disassembled and assembled. The operation is simple, which solves the technical problem of inconvenience in disassembling and assembling the entire pump body assembly and the motor in the prior art oil and gas recovery vacuum pump. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the ORVR oil and gas recovery vacuum pump provided in this utility model. Figure 2 This is a schematic diagram of the ORVR oil and gas recovery vacuum pump provided in another embodiment of the present invention; Figure 3 This is a cross-sectional view of Embodiment 1 of the ORVR oil and gas recovery vacuum pump provided in this utility model; Figure 4 This is a schematic diagram of the connection structure of the coupling assembly, output shaft and coupling of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the invention, showing the connection of the coupling assembly, output shaft, and coupling without removing one bearing structure. Figure 6This is a schematic diagram of the coupling of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 7 This is a schematic diagram of the structure of the first docking part of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 8 This is a schematic diagram of the structure of the first docking part of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model from another angle; Figure 9 This is a schematic diagram of the snap-fit ​​component of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 10 This is a schematic diagram of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model, which lacks an end cover. Figure 11 This is a schematic diagram of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the present invention, which lacks end caps and cylinder liners. Figure 12 This is a schematic diagram of the pump body of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 13 This is a schematic diagram of the pump body of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model from another angle; Figure 14 This is a cross-sectional view of the pump body of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 15 This is a schematic diagram of the internal structure of the ORVR oil and gas recovery vacuum pump body provided in this embodiment of the utility model; Figure 16 This is a schematic diagram of the outer shell of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 17 This is a cross-sectional view of the outer casing of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the present invention; Figure 18 This is a schematic diagram of the ORVR valve body of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 19 This is a schematic diagram of the ORVR valve body of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model from another angle. Figure 20 This is a cross-sectional view of the ORVR valve body of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 21 This is a schematic diagram of the valve core of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 22This is a schematic diagram of the sealing component of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 23 This is a schematic diagram of the sliding component of the ORVR oil and gas recovery vacuum pump provided in this embodiment of the utility model; Figure 24 This is a schematic diagram of the structure of Embodiment 2 of the ORVR oil and gas recovery vacuum pump provided in this utility model.

[0021] In the diagram: 1. Motor; 11. Output shaft; 2. Pump body; 21. Suction passage; 211. Suction connector; 212. Flame arrester; 22. Exhaust passage; 221. Exhaust connector; 23. Valve body passage; 24. Inlet port; 25. Outlet port; 26. Inspection passage; 27. Inspection bolt; 28. Long arc groove; 29. ​​Short arc groove; 210. Extension plate; 3. Gas pushing structure; 31. Cylinder liner; 32. End cover; 33. Rotor; 34. Blades; 4. ORVR valve body; 41. Valve sleeve; 42. Valve core; 421. Sealing component; 4211. Sealing plate; 4212. Sealing sleeve; 4213. Abutment ring; 4214. Connecting rod; 422. Sealing ring; 423. Spring; 424. Sliding component; 4241. Connecting sleeve; 4242. Fixing plate; 4243. Connecting component; 4244. Positioning plate; 5. Coupling assembly; 51. Stepped shaft; 52. Explosion-proof structure; 53. Bearing structure; 54. Spring; 55. Seal; 6. Controller; 7. Coupling; 71. First mating part; 711. Fixed disc; 7111. Snap-fit ​​groove; 71112. Process groove; 712. Snap-fit ​​block; 713. Connecting sleeve; 714. Positioning block; 72. Second mating part; 73. Snap-fit ​​part; 731. Ring; 732. Fixed block. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Example 1 This utility model provides an ORVR oil and gas recovery vacuum pump, including a motor 1, a pump body 2, a gas pushing structure 3, an ORVR valve body 4, a coupling 7, and a coupling assembly 5. The pump body 2 and the gas pushing structure 3 are connected at their middle parts by the coupling assembly 5, and the outer shells of the pump body 2 and the gas pushing structure 3 are connected. The extended end of the coupling assembly 5 is connected to the output shaft 11 of the motor 1 by the coupling 7. The ORVR valve body 4 is installed inside the pump body 2. The pump body 2 is close to the motor 1. The extension plate 210 on the pump body 2 is connected to the housing of the motor 1 by bolts. There are multiple extension plates 210. There is a gap between the end face of the pump body 2 and the end face of the motor 1. The extension plates 210 are set to avoid the gap. The coupling 7 is located in the gap, so that the operator can easily disassemble the coupling 7 through the gap. The coupling 7 can be a detachable structure. This utility model provides an ORVR oil and gas recovery vacuum pump. The pump body 2 and the gas pushing structure 3 are connected at the middle by a coupling assembly 5, and the outer shells of the pump body 2 and the gas pushing structure 3 are connected. The ORVR valve body 4 is installed inside the pump body 2. That is, the pump body 2, the gas pushing structure 3, the ORVR valve body 4, and the coupling assembly 5 form a pump body assembly. The extended end of the coupling assembly 5 is connected to the output shaft 11 of the motor 1 by a coupling 7. That is, the pump body assembly and the output shaft 11 of the motor 1 are connected by a coupling 7. The coupling 7 is a detachable structure. By disassembling the coupling 7, the entire pump body assembly and the motor 1 can be quickly disassembled and assembled. The operation is simple and solves the technical problem of inconvenience in disassembling and assembling the entire pump body assembly and the motor when disassembling and assembling the oil and gas recovery vacuum pump in the prior art.

[0026] As an optional implementation, the coupling 7 includes a first mating member 71, a second mating member 72, and a snap-fit ​​member 73. The first mating member 71 is connected to the output shaft 11 of the motor 1, and the second mating member 72 is connected to the coupling assembly 5. The first mating member 71 and the second mating member 72 are snap-fitted together by the snap-fit ​​member 73.

[0027] As an optional implementation, both the first docking member 71 and the second docking member 72 include a fixed disk 711, a snap-fit ​​block 712, a connecting sleeve 713, and a positioning block 714. The snap-fit ​​block 712 is fixedly connected to the outer end area of ​​one end face of the fixed disk 711. There are multiple snap-fit ​​blocks 712, and all snap-fit ​​blocks 712 are evenly distributed along the circumferential direction of the fixed disk 711. The connecting sleeve 713 is fixedly connected to the central area of ​​the other end face of the fixed disk 711, and the connecting sleeve 713 and the central area of ​​the fixed disk 711 are internally connected. There are two positioning blocks 714, and the positioning blocks 714 are fixed at the connection between the connecting sleeve 713 and the fixed disk 711. A snap-fit ​​groove 7111 is provided on one end face of the fixed disk 711. The number of snap-fit ​​grooves 7111 is the same as the number of snap-fit ​​blocks 712. All snap-fit ​​grooves 7111 are evenly distributed along the circumferential direction of the fixed disk 711. The snap-fit ​​grooves 7111 and snap-fit ​​blocks 712 are distributed alternately. A process groove 7112 is provided on the other end face of the fixed disk 711. The number of process grooves 7112 is the same as the number of snap-fit ​​blocks 712. The position of the process grooves 7112 corresponds to the position of the snap-fit ​​blocks 712. A countersunk hole is formed between the connecting sleeve 713 and the fixed plate 711. Both the ends of the coupling assembly 5 and the output shaft 11 of the motor 1 are provided with threaded holes and positioning ports. The connecting sleeve 713 can extend into the threaded hole, and the countersunk hole and the threaded hole are connected by bolts. The positioning block 714 cooperates with the positioning port. There are two positioning ports. The connection between the positioning block 714 and the positioning port can restrict the relative rotation between the coupling 7 and the motor 1 and between the coupling 7 and the coupling assembly 5.

[0028] As an optional implementation, the snap-fit ​​component 73 includes a ring 731 and fixing blocks 732. There are multiple fixing blocks 732, which are fixedly connected to the outer wall of the ring 731. All fixing blocks 732 are evenly distributed along the circumferential direction of the ring 731. There is a positioning space between two adjacent fixing blocks 732. The snap-fit ​​block 712 is connected to the positioning space. When the first docking component 71, the second docking component 72 and the snap-fit ​​component 73 are connected, the snap-fit ​​block 712 on the first docking component 71 and the snap-fit ​​block 712 on the second docking component 72 are alternately distributed in the corresponding positioning space. The end of the snap-fit ​​block 712 on the first docking component 71 enters the snap-fit ​​groove 7111 on the second docking component 72, and the end of the snap-fit ​​block 712 on the second docking component 72 enters the snap-fit ​​groove 7111 on the first docking component 71.

[0029] As an optional implementation, the coupling assembly 5 includes a stepped shaft 51, an explosion-proof structure 52, a bearing structure 53, a spring 54, and a seal 55. There are two bearing structures 53, with one bearing structure 53, the explosion-proof structure 52, the other bearing structure 53, the spring 54, and the seal 55 sequentially mounted on the stepped shaft. The explosion-proof structure 52 serves as an explosion-proof barrier to prevent flames from entering the pump body 2. The two bearing structures 53 are located on opposite sides of the explosion-proof structure 52.

[0030] As an optional implementation, the pump body 2 is provided with an air intake channel 21, an air exhaust channel 22, a valve body channel 23, an air inlet hole 24, and an air outlet hole 25. The air intake channel 21 and the air exhaust channel 22 are connected through the valve body channel 23, and the air intake channel 21, the valve body channel 23, and the air exhaust channel 22 form a U-shaped structure. The ORVR valve body 4 is installed in the valve body channel 23 and controls the opening and closing of the valve body channel 23. The air intake channel 21 is connected to the gas pushing structure 3 through the air inlet hole 24, and the air exhaust channel 22 is connected to the gas pushing structure 3 through the air outlet hole 25. When refueling a non-ORVR car, motor 1 drives the gas pushing structure 3, the ORVR valve body 4 is in a closed state, and the ORVR vapor recovery vacuum pump can maintain a gas-liquid ratio of 1.0 to 1.2 for secondary vapor recovery. The vapor passes sequentially through the fuel nozzle, suction channel 21, air inlet 24, the internal chamber of the gas pushing structure 3, air outlet 25, and exhaust channel 22, finally entering the fuel tank. When refueling an ORVR car, the ORVR fuel nozzle function is activated, and the gas-liquid ratio is maintained at 0.5. At this time, the intake channel 21 cannot absorb gas from the oil gun, which will increase the negative pressure inside the intake channel 21, thereby causing the ORVR valve body 4 to open. The gas in the exhaust channel 22 passes through the valve body channel 23, the intake channel 21, the inlet port 24, the internal chamber of the gas pushing structure 3, and the outlet port 25 in sequence, and then returns to the exhaust channel 22 to achieve internal circulation. This avoids the ORVR oil and gas recovery vacuum pump from getting stuck and the motor 1 from burning out, so that the ORVR oil and gas recovery vacuum pump can be used in the ORVR vehicle oil and gas recovery system.

[0031] As an optional implementation, an intake connector 211 is provided at the port of the intake channel 21, which can be quickly disassembled and installed with the oil gun pipeline. An exhaust connector 221 is provided at the port of the exhaust channel 22, which can be quickly disassembled and installed with the oil tank pipeline. A flame arrester 212 is installed on both the intake connector 211 and the exhaust connector 221. When the ORVR oil and gas recovery vacuum pump burns, the flame arrester 212 is used to extinguish the flame.

[0032] The pump body 2 is also provided with two maintenance channels 26. One maintenance channel 26 is connected to the suction channel 21, and the other maintenance channel 26 is connected to the exhaust channel 22. Maintenance bolts 27 are installed in the maintenance channels 26 to quickly check whether the pump body 2 is damaged.

[0033] As an optional implementation, the gas pushing structure 3 includes a cylinder liner 31, an end cover 32, a rotor 33, and blades 34. The cylinder liner 31 is located between the end cover 32 and the pump body 2. The end cover 32 is connected to the pump body 2 by a screw. The rotor 33 and the blades 34 are both located inside the cylinder liner 31. The rotor 33 is connected to the output shaft 11 of the motor 1 and is eccentrically positioned. The rotor 33 can be made of copper. Multiple grooves are provided on the circumferential sidewall of the rotor 33. There are multiple blades 34, which are made of PPS composite material. Made of materials with self-lubricating, high strength, and wear-resistant properties, the blades 34 correspond one-to-one with the sliding grooves and are slidably connected. Two adjacent blades 34, the rotor 33, and the cylinder liner 31 form a closed cavity. The motor 1 can drive the rotor 33 to rotate. Under the action of centrifugal force, the blades 34 will move in the radial direction, so that the other end of the blades 34 is in close contact with the inner wall of the cylinder liner 31. This will cause the volume of the closed cavity to change during the rotation process. The volume will change back and forth from small to large and then from large to small, thereby realizing the intake and exhaust process.

[0034] As an optional implementation, the pump body 2 is also provided with a long arc-shaped groove 28 and a short arc-shaped groove 29 on its end face. The long arc-shaped groove 28 is connected to the air inlet hole 24, and the short arc-shaped groove 29 is connected to the air outlet hole 25. The long arc-shaped groove 28 and the short arc-shaped groove 29 are respectively connected to closed cavities at different positions. The closed cavities are connected to the air intake channel 21 through the air inlet hole 24, and the closed cavities are connected to the air exhaust channel 22 through the air outlet hole 25.

[0035] As an optional implementation, the ORVR valve body 4 includes a valve sleeve 41 and a valve core 42. The valve core 42 is located inside the valve sleeve 41 and is slidably connected to the valve sleeve 41. The valve core 42 can control the opening and closing of the valve sleeve 41. The valve sleeve 41 is located inside the valve body channel 23 and is threadedly connected to the valve body channel 23. Under the negative pressure inside the intake channel 21, the valve core 42 will move towards the intake channel 21, thereby creating a flow gap between it and the valve sleeve 41, allowing gas to flow. The valve core 42 will also move in the opposite direction under its own compression elasticity, thereby blocking the valve sleeve 41.

[0036] The valve core 42 includes a plugging component 421, a sealing ring 422, a spring 423, and a sliding component 424. The plugging component 421 and the sliding component 424 are plugged into each other. The sealing ring 422 is fitted onto the plugging component 421. The spring 423 is fitted onto the sliding component 424, and both ends of the spring 423 abut against the ends of the sliding component 424 and the limiting step inside the valve sleeve 41, respectively. The sliding component 424 is slidably connected to the inner ring of the valve sleeve 41. The plugging component 421 can block the port of the valve sleeve 41. A flow groove is provided on the axial side wall of the sliding component 424. Under the negative pressure inside the suction channel 21, the plugging component 421 will move towards the suction channel 21, thereby disengaging from the port of the valve sleeve 41. The sliding component 424 will also move accordingly, thereby compressing the spring 423, so that gas can pass through the flow groove. Under the compression force of spring 423, sliding member 424 will move in the opposite direction, which will also cause sealing member 421 to move in the opposite direction, so that sealing member 421 enters the port of valve sleeve 41. Sealing member 421 will be sealed by sealing ring 422, thereby blocking valve sleeve 41.

[0037] The sealing component 421 includes a sealing plate 4211, a sealing sleeve 4212, an abutment ring 4213, and a connecting rod 4214. The sealing plate 4211 is fixedly connected to one end of the sealing sleeve 4212. The inner ring of the abutment ring 4213 is fixedly connected to the outer ring of the other end of the sealing sleeve 4212. The end of the connecting rod 4214 is located inside the sealing sleeve 4212 and is fixedly connected to the sealing plate 4211. An installation groove is formed between the outer wall of the sealing plate 4211, the sealing sleeve 4212, and the abutment ring 4213. The sealing ring 422 is installed in the installation groove. The connecting rod 4214 is inserted into the sliding component 424. The connecting rod 4214 will be inserted into the insertion channel.

[0038] The sliding component 424 includes a connecting sleeve 4241, a fixing plate 4242, a connector 4243, and a positioning plate 4244. The connecting sleeve 4241, the fixing plate 4242, and the connector 4243 are fixedly connected in sequence, and each of them has an insertion channel inside. There are multiple positioning plates 4244. All positioning plates 4244 are distributed along the circumferential direction of the connector 4243. A part of the positioning plate 4244 is fixedly connected to the connector 4243, and the other part of all positioning plates 4244 extends beyond the connector 4243 and is connected to it. A spring 423 is sleeved on the positioning plate 4244, and there is a flow groove between two adjacent positioning plates 4244.

[0039] The ORVR vapor recovery vacuum pump also includes a controller 6, which is electrically connected to the motor 1. The controller 6 is equipped with a current sensing element and can control the operating speed of the motor 1, thus ensuring that the gas-liquid ratio is maintained between 1.0 and 1.2 when refueling non-ORVR passenger cars. The motor 1 can be a DC permanent magnet motor with two mounting options, allowing for quick replacement of damaged vacuum pumps and reducing maintenance time. When refueling an ORVR passenger car, the current sensing element on the controller 6 detects an increase in current compared to refueling a non-ORVR passenger car, causing the controller 6 to shut down the motor 1 for protection. The gas-liquid ratio can be maintained at an even lower level.

[0040] Example 2 The difference between this second embodiment and the first embodiment is as follows: This utility model provides an ORVR oil and gas recovery vacuum pump, including a motor 1, a pump body 2, a gas pushing structure 3, an ORVR valve body 4, a coupling 7, and a coupling assembly 5. The gas pushing structure 3 is close to the motor 1, and the outer shell of the gas pushing structure 3 is connected to the motor 1 by bolts, with a gap between the end face of the gas pushing structure 3 and the end face of the motor 1. The coupling 7 is located in the gap. The pump body 2 is provided with an intake channel 21, an exhaust channel 22, a valve body channel 23, an inlet port 24, and an outlet port 25. The intake channel 21 and the exhaust channel 22 are connected through the valve body channel 23. The intake channel 21, the valve body channel 23, and the exhaust channel 22 are on the same straight channel. The ORVR valve body 4 is installed in the valve body channel 23 and controls the opening and closing of the valve body channel 23. The intake channel 21 is connected to the gas pushing structure 3 through the inlet port 24, and the exhaust channel 22 is connected to the gas pushing structure 3 through the outlet port 25. Pump body 2 is equivalent to the end cap on gas pushing structure 3.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An ORVR oil-gas recovery vacuum pump, characterized in that, It includes a motor (1), a pump body (2), a gas pushing structure (3), an ORVR valve body (4), a coupling (7), and a coupling assembly (5), wherein, The pump body (2) and the gas pushing structure (3) are connected in the middle by the coupling assembly (5) and the outer shells of the pump body (2) and the gas pushing structure (3) are connected. The extended end of the coupling assembly (5) is connected to the output shaft (11) of the motor (1) by the coupling (7). The ORVR valve body (4) is installed inside the pump body (2). The pump body (2) is close to the motor (1), and the extension plate (210) on the pump body (2) is connected to the housing of the motor (1) by bolts. There is a gap between the end face of the pump body (2) and the end face of the motor (1), and the coupling (7) is located in the gap. Alternatively, the gas pushing structure (3) is close to the motor (1), and the housing of the gas pushing structure (3) is connected to the motor (1) by bolts. There is a gap between the end face of the gas pushing structure (3) and the end face of the motor (1), and the coupling (7) is located in the gap. The coupling (7) is a detachable structure.

2. The ORVR oil and gas recovery vacuum pump according to claim 1, characterized in that, The coupling (7) includes a first docking part (71), a second docking part (72) and a snap-fit ​​part (73). The first docking part (71) is connected to the output shaft (11) of the motor (1), and the second docking part (72) is connected to the coupling assembly (5). The first docking part (71) and the second docking part (72) are snap-fitted together by the snap-fit ​​part (73).

3. The ORVR oil and gas recovery vacuum pump according to claim 2, characterized in that, Both the first docking component (71) and the second docking component (72) include a fixed disk (711), a snap-fit ​​block (712), a connecting sleeve (713), and a positioning block (714). The snap-fit ​​block (712) is fixedly connected to the outer end area of ​​one end face of the fixed disk (711). There are multiple snap-fit ​​blocks (712), and all snap-fit ​​blocks (712) are evenly distributed along the circumferential direction of the fixed disk (711). The connecting sleeve (713) is fixedly connected to the central area of ​​the other end face of the fixed disk (711), and the connecting sleeve (713) and the central area of ​​the fixed disk (711) are internally connected. There are two positioning blocks (714), and the positioning blocks (714) are fixed at the connection between the connecting sleeve (713) and the fixed disk (711). A snap-fit ​​groove (7111) is provided on one end face of the fixed plate (711), and a process groove (7112) is provided on the other end face of the fixed plate (711). A countersunk hole is formed between the connecting sleeve (713) and the fixed plate (711). The ends of both the coupling assembly (5) and the output shaft (11) of the motor (1) are provided with threaded holes and positioning ports. The connecting sleeve (713) can extend into the threaded hole and the countersunk hole is connected to the threaded hole by bolts. The positioning block (714) cooperates with the positioning port.

4. The ORVR oil and gas recovery vacuum pump according to claim 3, characterized in that, The snap-fit ​​component (73) includes a ring (731) and a fixing block (732). There are multiple fixing blocks (732). The fixing blocks (732) are fixedly connected to the outer wall of the ring (731). All the fixing blocks (732) are evenly distributed along the circumferential direction of the ring (731). There is a positioning space between two adjacent fixing blocks (732). The snap-fit ​​component (712) is connected to the positioning space.

5. The ORVR oil and gas recovery vacuum pump according to claim 1, characterized in that, The coupling assembly (5) includes a stepped shaft (51), an explosion-proof structure (52), a bearing structure (53), a spring (54), and a seal (55). There are two bearing structures (53). One bearing structure (53), the explosion-proof structure (52), the other bearing structure (53), the spring (54), and the seal (55) are all installed on the stepped shaft in sequence.

6. The ORVR oil and gas recovery vacuum pump according to claim 1, characterized in that, The pump body (2) is provided with an air intake channel (21), an exhaust channel (22), a valve body channel (23), an air inlet hole (24), and an air outlet hole (25). The air intake channel (21) and the exhaust channel (22) are connected through the valve body channel (23). The ORVR valve body (4) is installed in the valve body channel (23) and controls the opening and closing of the valve body channel (23). The air intake channel (21) is connected to the gas pushing structure (3) through the air inlet hole (24), and the exhaust channel (22) is connected to the gas pushing structure (3) through the air outlet hole (25).

7. The ORVR oil and gas recovery vacuum pump according to claim 6, characterized in that, An air intake connector (211) is provided on the port of the air intake channel (21), and an exhaust connector (221) is provided on the port of the exhaust channel (22). A flame arrester (212) is installed on both the air intake connector (211) and the exhaust connector (221). The pump body (2) is also provided with two maintenance channels (26). One maintenance channel (26) is connected to the air intake channel (21), and the other maintenance channel (26) is connected to the exhaust channel (22). Maintenance bolts (27) are installed in the maintenance channels (26).

8. The ORVR oil and gas recovery vacuum pump according to claim 1, characterized in that, The gas pushing structure (3) includes a cylinder liner (31), an end cover (32), a rotor (33), and a blade (34). The cylinder liner (31) is located between the end cover (32) and the pump body (2). The end cover (32) is connected to the pump body (2) by a screw. The rotor (33) and the blade (34) are both located inside the cylinder liner (31). The rotor (33) is connected to the output shaft (11) of the motor (1), and the rotor (33) is eccentrically arranged. The rotor (33) has multiple sliding grooves on its circumferential sidewalls. There are multiple blades (34). Each blade (34) corresponds to a sliding groove and is slidably connected. Two adjacent blades (34), the rotor (33), and the cylinder liner (31) form a closed cavity.

9. The ORVR oil and gas recovery vacuum pump according to claim 6, characterized in that, The pump body (2) is also provided with a long arc groove (28) and a short arc groove (29) on its end face. The long arc groove (28) is connected to the air inlet hole (24), and the short arc groove (29) is connected to the air outlet hole (25). The long arc groove (28) and the short arc groove (29) are respectively connected to closed cavities at different positions.

10. The ORVR oil and gas recovery vacuum pump according to claim 6, characterized in that, The ORVR valve body (4) includes a valve sleeve (41) and a valve core (42). The valve core (42) is located inside the valve sleeve (41) and is slidably connected to the valve sleeve (41). The valve core (42) can control the opening and closing of the valve sleeve (41). The valve sleeve (41) is located inside the valve body channel (23) and is threadedly connected to the valve body channel (23). The valve core (42) includes a plug (421), a sealing ring (422), a spring (423), and a sliding member (424). The plug (421) is plugged into the sliding member (424). The sealing ring (422) is sleeved on the plug (421). The spring (423) is sleeved on the sliding member (424), and the two ends of the spring (423) abut against the end of the sliding member (424) and the limiting step inside the valve sleeve (41), respectively. The sliding member (424) is slidably connected to the inner ring of the valve sleeve (41). The plug (421) can block the port of the valve sleeve (41). A flow groove is provided on the axial side wall of the sliding member (424).

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