ORVR valve for oil gas recovery vacuum pump

Abstract

The utility model provides an ORVR valve for an oil-gas recovery vacuum pump, relates to the technical field of oil-gas recovery equipment of gas stations, and solves the technical problems that in the prior art, when the gas-liquid ratio is maintained below 0.5, the vacuum pump is in a locked-rotor state and is easy to damage. The device comprises an ORVR valve body, an air inlet three-way connector, an air outlet three-way connector, an oil gun pipeline and an oil tank pipeline, the air inlet end of the ORVR valve body is connected with a first connector of the air inlet three-way connector, the air outlet end of the ORVR valve body is connected with a first connector of the air outlet three-way connector, and the air outlet end of the ORVR valve body is connected with a second connector of the air outlet three-way connector. An air suction pipeline of the vacuum pump is connected with a second connector of the air inlet three-way connector, an exhaust pipeline of the vacuum pump is connected with a second connector of the exhaust three-way connector, the oil gun pipeline is connected with a third connector of the air inlet three-way connector, and the oil tank pipeline is connected with a third connector of the exhaust three-way connector.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil station oil gas recovery equipment technical field especially is related to a kind of ORVR valves for oil gas recovery vacuum pump. BACKGROUND

[0002] Secondary oil gas recovery system refers to the technology that during refueling, the oil gas volatilized during refueling is collected into underground storage tank for treatment by vacuum-assisted oil gas recovery equipment. The system uses the negative pressure generated by vacuum pump to suck the oil gas generated during refueling into underground storage tank through underground oil gas recovery pipeline, thereby reducing the release of oil gas during refueling and avoiding the leakage of oil gas into the atmosphere. The secondary oil gas recovery by vacuum pump can make the gas-liquid ratio reach 1.0-1.2.

[0003] Because the gas-liquid ratio requirement is 1.0-1.2, the over-extracted gas will be discharged into the atmosphere, which will pollute the environment. A new oil gas recovery technology, ORVR technology, is born. Currently, a part of fuel vehicles are equipped with ORVR system. When refueling, ORVR technology needs to cooperate with ORVR fuel gun. ORVR fuel gun can independently sense whether the vehicle is equipped with ORVR function. The oil gun will activate the function to maintain the gas-liquid ratio below 0.5 and complete the on-board oil gas recovery.

[0004] When the existing vacuum pump is used to refuel the fuel vehicle equipped with ORVR system, the gas-liquid ratio needs to be maintained below 0.5. At this time, the vacuum pump will be in a locked-rotor state, cannot extract gas, temperature rises, noise increases, and is easy to be damaged. Moreover, it is necessary to purchase and install a new vacuum pump, which is too high in cost. INVENTION CONTENTS

[0005] The utility model aims at providing an ORVR valve for oil gas recovery vacuum pump to solve the technical problem in the prior art that when the gas-liquid ratio is maintained below 0.5, the vacuum pump will be in a locked-rotor state and is easy to be damaged 。 The preferred technical solutions in the many technical solutions provided by the utility model can produce many technical effects, which are described in detail below.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0007] The utility model provides an ORVR valve for oil gas recovery vacuum pump, including ORVR valve body, air inlet tee joint, exhaust tee joint, oil gun pipeline and oil tank pipeline, wherein, the air inlet end of ORVR valve body is connected with the first interface of air inlet tee joint, the air outlet end of ORVR valve body is connected with the first interface of exhaust tee joint, the air suction pipeline of vacuum pump is connected with the second interface of air inlet tee joint, the exhaust pipeline of vacuum pump is connected with the second interface of exhaust tee joint, the oil gun pipeline is connected with the third interface of air inlet tee joint, the oil tank pipeline is connected with the third interface of exhaust tee joint.

[0008] Optionally, the ORVR valve body includes a valve sleeve and a valve core, the valve core is located in the valve sleeve and is in sliding connection with the valve sleeve, the valve core can control the opening and closing of the valve sleeve, and two ends of the valve sleeve are connected with the first interface of the air inlet tee joint and the first interface of the exhaust tee joint respectively.

[0009] Optionally, an inner thread is arranged on the inner ring of the end of the valve sleeve.

[0010] Optionally, the valve core includes a plugging piece, a sealing ring, a spring and a movable piece, the plugging piece is in plug-in connection with the movable piece, the sealing ring is sleeved on the plugging piece, and the spring is sleeved on the movable piece.

[0011] Optionally, a plugging channel, a through channel and a compression channel are arranged in the valve sleeve, the inner diameter of the plugging channel is greater than that of the through channel, the inner diameter of the compression channel is greater than that of the through channel, the plugging channel and the through channel are in communication through a transition channel, the through channel and the compression channel are in communication, a step structure is arranged at the connection position of the through channel and the compression channel, the movable piece is in sliding connection with the through channel, and two ends of the movable piece pass through two ends of the through channel respectively, the spring is located at the compression channel, one end of the spring abuts against the step structure, and the plugging piece can block the plugging channel.

[0012] Optionally, the plugging piece includes a plugging plate, a plugging sleeve, an abutting ring and a connecting rod, the plugging plate is fixedly connected with one end of the plugging sleeve, the inner ring of the abutting ring is fixedly connected with the outer ring of the other end of the plugging sleeve, the end of the connecting rod is located in the plugging sleeve and is fixedly connected with the plugging plate, a mounting groove is formed among the plugging plate, the outer wall of the plugging sleeve and the abutting ring, the sealing ring is mounted in the mounting groove, and the connecting rod is in plug-in connection with the movable piece.

[0013] Optionally, the outer diameter of the sealing plate is larger than the outer diameter of the abutting ring, a plurality of stepped grooves are arranged on the connecting rod, and a chamfer is arranged on the outer end of the abutting ring.

[0014] Optionally, the movable piece comprises a connecting sleeve, a fixed plate, a connecting piece and a plurality of positioning plates, the connecting sleeve, the fixed plate and the connecting piece are sequentially fixedly connected and internally provided with a plug-in channel, the number of the positioning plates is plural, all the positioning plates are distributed along the circumferential direction of the connecting piece, a part of the positioning plates is fixedly connected with the connecting piece, another part of all the positioning plates exceeds the connecting piece and is connected, and the spring sleeve is arranged on the positioning plates.

[0015] Optionally, the positioning plate comprises a fixed segment, a connecting segment and a limiting segment, the fixed segment is fixedly connected with the connecting piece, the connecting segment is fixedly arranged on the inner side of the end of the fixed segment, the limiting segment is fixedly arranged on the outer side of the end of the fixed segment, the connecting segments on all the positioning plates are fixedly connected, and the limiting segment abuts against the other end of the spring.

[0016] Optionally, external threads are arranged on the interfaces of the air inlet three-way joint and the air outlet three-way joint, locking nuts are arranged on the oil gun pipeline, the oil tank pipeline, the air suction pipeline and the air exhaust pipeline, and the locking nuts are threadedly connected with the external threads.

[0017] The ORVR valve for the oil gas recovery vacuum pump is provided, when the oil gun is used to fuel the non-ORVR fuel vehicle, the ORVR valve body is in a closed state, the vacuum pump still performs secondary oil gas recovery by maintaining the gas-liquid ratio at 1.0-1.2, namely, the oil gas sequentially passes through the oil gun pipeline, the air inlet three-way joint, the air suction pipeline, the air exhaust pipeline, the air outlet three-way joint and the oil tank pipeline and enters the oil tank, when the oil gun is used to fuel the ORVR fuel vehicle, the gas-liquid ratio is maintained below 0.5, the ORVR valve body is in a conducting state under the suction force of the vacuum pump, so that the gas in the air exhaust pipeline enters the air suction pipeline through the ORVR valve body and flows through the vacuum pump, the internal circulation of the gas between the vacuum pump and the ORVR valve body is realized, the vacuum pump is prevented from being stuck and the motor is prevented from being burnt and damaged, and the technical problem that the vacuum pump is stuck and damaged when the gas-liquid ratio is maintained below 0.5 in the prior art is solved. 。 BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 is a structural schematic view of a vacuum pump of the prior art;

[0020] Figure 2 is a structural schematic view of an ORVR valve for an oil and gas recovery vacuum pump provided by the embodiment of the present application installed on a vacuum pump;

[0021] Figure 3 is a structural schematic view of an ORVR valve for an oil and gas recovery vacuum pump provided by the embodiment of the present application;

[0022] Figure 4 is a structural schematic view of the connection of an ORVR valve body, an air inlet tee joint and an air outlet tee joint of an ORVR valve for an oil and gas recovery vacuum pump provided by the embodiment of the present application;

[0023] Figure 5 is a sectional view of the connection of an ORVR valve body, an air inlet tee joint and an air outlet tee joint of an ORVR valve for an oil and gas recovery vacuum pump provided by the embodiment of the present application;

[0024] Figure 6 is a sectional view of an ORVR valve body of an ORVR valve for an oil and gas recovery vacuum pump provided by the embodiment of the present application;

[0025] Figure 7 is a sectional view of a valve sleeve of an ORVR valve for an oil and gas recovery vacuum pump provided by the embodiment of the present application;

[0026] Figure 8 is a structural schematic view of a valve core of an ORVR valve for an oil and gas recovery vacuum pump provided by the embodiment of the present application;

[0027] Figure 9 is a structural schematic view of a movable piece of an ORVR valve for an oil and gas recovery vacuum pump provided by the embodiment of the present application;

[0028] Figure 10 is a structural schematic view of a plugging piece of an ORVR valve for an oil and gas recovery vacuum pump provided by the embodiment of the present application.

[0029] 1, ORVR valve body; 11, valve sleeve; 111, blocking channel; 112, through channel; 113, compression channel; 114, transition channel; 115, step structure; 12, valve core; 121, blocking piece; 1211, blocking plate; 1212, blocking sleeve; 1213, abutting ring; 1214, connecting rod; 122, sealing ring; 123, spring; 124, movable piece; 1241, connecting sleeve; 1242, fixed plate; 1243, connecting piece; 1244, positioning plate; 12441, fixed segment; 12442, connecting segment; 12443, limiting segment;

[0030] 2, intake tee joint;

[0031] 3, exhaust tee joint;

[0032] 4, oil gun pipeline;

[0033] 5, oil tank pipeline;

[0034] 6, vacuum pump; 61, suction pipeline; 62, exhaust pipeline. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope protected by the utility model.

[0036] In the description of the utility model, it needs to be explained that, unless otherwise stated, the meaning of "multiple" is two or more than two;The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term " install ", " link ", " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can through the intermediate medium indirectly connect.For ordinary skilled person in the art, can view specific situation understanding above-mentioned term in the utility model specific meaning.

[0038] The utility model provides a kind of ORVR valve for oil gas recovery vacuum pump, including ORVR valve body 1, intake three-way joint 2, exhaust three-way joint 3, oil gun pipeline 4 and oil tank pipeline 5, wherein, the air inlet end of ORVR valve body 1 is connected with the first interface of intake three-way joint 2, the air outlet end of ORVR valve body 1 is connected with the first interface of exhaust three-way joint 3, the suction pipeline 61 of vacuum pump 6 is connected with the second interface of intake three-way joint 2, the exhaust pipeline 62 of vacuum pump 6 is connected with the second interface of exhaust three-way joint 3, oil gun pipeline 4 is connected with the third interface of intake three-way joint 2, oil tank pipeline 5 is connected with the third interface of exhaust three-way joint 3.The utility model provides a kind of ORVR valve for oil gas recovery vacuum pump, when oil gun is refueling to non-ORVR fuel vehicle, ORVR valve body 1 is in closed state, vacuum pump 6 is still according to gas-liquid ratio maintaining 1.0~1.2 to carry out secondary oil gas recovery, i.e.

[0039] As an optional implementation, the ORVR valve body 1 comprises a valve sleeve 11 and a valve core 12, the valve core 12 is located in the valve sleeve 11 and is in sliding connection with the valve sleeve 11, the valve core 12 can control the opening and closing of the valve sleeve 11, and the two ends of the valve sleeve 11 are connected with the first interface of the air inlet three-way joint 2 and the first interface of the air outlet three-way joint 3 respectively. The valve core 12 will move towards the air inlet three-way joint 2 under the suction of the vacuum pump 6, so that there will be a flow gap between the valve sleeve 11 and the valve core 12, and the oil gas can flow; when the vacuum pump 6 is normally running, the valve core 12 will move away from the air inlet three-way joint 2 under the action of its own elastic force, so that the valve sleeve 11 and the valve core 12 will be sealed, avoiding the flow of oil gas.

[0040] As an optional implementation, the valve core 12 comprises a blocking piece 121, a sealing ring 122, a spring 123 and a movable piece 124, the blocking piece 121 is in plug-in connection with the movable piece 124, the sealing ring 122 is sleeved on the blocking piece 121, and the spring 123 is sleeved on the movable piece 124. The valve sleeve 11 is provided with a blocking passage 111, a through passage 112 and a compression passage 113, the inner diameter of the blocking passage 111 is greater than that of the through passage 112, the inner diameter of the compression passage 113 is greater than that of the through passage 112, the blocking passage 111 and the through passage 112 are connected in communication through a transition passage 114, the blocking passage 111 is located on the side close to the air inlet three-way joint 2, the through passage 112 and the compression passage 113 are connected in communication, and the connection of the through passage 112 and the compression passage 113 is provided with a stepped structure 115, the compression passage 113 is located on the side close to the air outlet three-way joint 3, the movable piece 124 is in sliding connection with the through passage 112 and the two ends of the movable piece 124 pass through the two ends of the through passage 112 respectively, the spring 123 is located at the compression passage 113 and one end of the spring 123 abuts against the stepped structure 115, and the blocking piece 121 can block the blocking passage 111. Under the suction of the vacuum pump 6, the blocking piece 121 will move towards the air inlet three-way joint 2, thereby separating from the blocking passage 111, and the movable piece 124 will also move, thereby compressing the spring 123. Under the compression elastic force of the spring 123, the movable piece 124 will move in the opposite direction, thereby moving the blocking piece 121 in the opposite direction, so that the blocking piece 121 enters the blocking passage 111, and the blocking piece 121 and the blocking passage 111 are sealed by the sealing ring 122, thereby blocking the blocking passage 111.

[0041] As an optional implementation, the blocking piece 121 comprises a blocking plate 1211, a blocking sleeve 1212, an abutting ring 1213 and a connecting rod 1214, the blocking plate 1211 is fixedly connected with one end of the blocking sleeve 1212, the inner ring of the abutting ring 1213 is fixedly connected with the outer ring of the other end of the blocking sleeve 1212, the end of the connecting rod 1214 is located in the blocking sleeve 1212 and is fixedly connected with the blocking plate 1211, the mounting groove is formed among the blocking plate 1211, the outer wall of the blocking sleeve 1212 and the abutting ring 1213, the sealing ring 122 is mounted in the mounting groove, the connecting rod 1214 is connected with the movable piece 124 in a plug-in manner, and the connecting rod 1214 is inserted into the plug-in channel.

[0042] As an optional implementation, the outer diameter of the blocking plate 1211 is greater than the outer diameter of the abutting ring 1213, so as to avoid the sealing ring 122 from being separated from the blocking piece 121, and also so as to enhance the sealing effect, a plurality of stepped grooves are arranged on the connecting rod 1214, and a chamfer is arranged on the outer end of the abutting ring 1213, which is used for aligning the transition channel 114.

[0043] As an optional implementation, the movable piece 124 comprises a connecting sleeve 1241, a fixed plate 1242, a connecting piece 1243 and a plurality of positioning plates 1244, the connecting sleeve 1241, the fixed plate 1242 and the connecting piece 1243 are fixedly connected in sequence and are provided with plug-in channels inside, the number of the positioning plates 1244 is plural, all the positioning plates 1244 are distributed along the circumferential direction of the connecting piece 1243, a part of the positioning plates 1244 is fixedly connected with the connecting piece 1243, and the other part of the positioning plates 1244 exceeds the connecting piece 1243 and is connected, the spring 123 is sleeved on the positioning plates 1244, when the fixed plate 1242 is located in the blocking channel 111, the oil and gas passing through the penetrating channel 112 into the blocking channel 111 will flow between the adjacent two positioning plates 1244.

[0044] As an optional implementation, the positioning plate 1244 comprises a fixed segment 12441, a connecting segment 12442 and a limiting segment 12443, the fixed segment 12441 is fixedly connected with the connecting piece 1243, the connecting segment 12442 is fixedly connected with the inner side of the end of the fixed segment 12441, the limiting segment 12443 is fixedly connected with the outer side of the end of the fixed segment 12441, the connecting segment 12442 and the limiting segment 12443 are located at the same end of the fixed segment 12441, the connecting segments 12442 on all the positioning plates 1244 are fixedly connected, and the limiting segments 12443 abut against the other end of the spring 123.

[0045] As an optional implementation, the interfaces on the air inlet three-way joint 2 and the air outlet three-way joint 3 are provided with external threads, the end inner ring of the valve sleeve 11 is provided with internal threads, the oil gun pipeline 4, the oil tank pipeline 5, the air suction pipeline 61 and the air outlet pipeline 62 are all provided with locking nuts, the locking nuts are threadedly connected with the external threads, and the external threads and the internal threads are threadedly connected.

[0046] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An ORVR valve for an ORVR vacuum pump, characterized by, The ORVR valve body (1), the air inlet tee joint (2), the air outlet tee joint (3), the oil gun pipeline (4) and the oil tank pipeline (5) are included, wherein, The air inlet end of the ORVR valve body (1) is connected with the first interface of the air inlet tee joint (2), the air outlet end of the ORVR valve body (1) is connected with the first interface of the air outlet tee joint (3), the air suction pipeline (61) of the vacuum pump (6) is connected with the second interface of the air inlet tee joint (2), the air exhaust pipeline (62) of the vacuum pump (6) is connected with the second interface of the air outlet tee joint (3), the oil gun pipeline (4) is connected with the third interface of the air inlet tee joint (2), and the oil tank pipeline (5) is connected with the third interface of the air outlet tee joint (3).

2. An ORVR valve for an ORVR vacuum pump according to claim 1, characterized in that, The ORVR valve body (1) includes a valve sleeve (11) and a valve core (12), the valve core (12) is located in the valve sleeve (11) and is in sliding connection with the valve sleeve (11), the valve core (12) can control the opening and closing of the valve sleeve (11), and the two ends of the valve sleeve (11) are respectively connected with the first interface of the air inlet tee joint (2) and the first interface of the air outlet tee joint (3).

3. An ORVR valve for an ORVR vacuum pump according to claim 2, characterized in that, An inner thread is arranged on the inner ring of the end of the valve sleeve (11).

4. An ORVR valve for an ORVR vacuum pump according to claim 2, wherein The valve core (12) includes a plugging piece (121), a sealing ring (122), a spring (123) and a movable piece (124), the plugging piece (121) is in plug-in connection with the movable piece (124), the sealing ring (122) is sleeved on the plugging piece (121), and the spring (123) is sleeved on the movable piece (124).

5. An ORVR valve for an ORVR vacuum pump according to claim 4, characterized in that, The valve sleeve (11) is provided with a plugging channel (111), a through channel (112) and a compression channel (113), the inner diameter of the plugging channel (111) is greater than that of the through channel (112), the inner diameter of the compression channel (113) is greater than that of the through channel (112), the plugging channel (111) and the through channel (112) are connected in communication through a transition channel (114), the through channel (112) and the compression channel (113) are connected in communication, a stepped structure (115) is arranged at the connection of the through channel (112) and the compression channel (113), the movable piece (124) is in sliding connection with the through channel (112), the two ends of the movable piece (124) pass through the two ends of the through channel (112) respectively, the spring (123) is located at the compression channel (113), one end of the spring (123) abuts against the stepped structure (115), and the plugging piece (121) can plug the plugging channel (111).

6. An ORVR valve for an ORVR vacuum pump according to claim 4, wherein The sealing piece (121) comprises a sealing plate (1211), a sealing sleeve (1212), an abutting ring (1213) and a connecting rod (1214), the sealing plate (1211) is fixedly connected with one end of the sealing sleeve (1212), the inner ring of the abutting ring (1213) is fixedly connected with the outer ring of the other end of the sealing sleeve (1212), the end of the connecting rod (1214) is located in the sealing sleeve (1212) and is fixedly connected with the sealing plate (1211), the sealing plate (1211), the outer wall of the sealing sleeve (1212) and the abutting ring (1213) form a mounting groove therebetween, the sealing ring (122) is mounted in the mounting groove, and the connecting rod (1214) is insertedly connected with the movable piece (124).

7. An ORVR valve for an ORVR vacuum pump according to claim 6, characterized in that, The outer diameter of the sealing plate (1211) is greater than the outer diameter of the abutting ring (1213), a plurality of stepped grooves are arranged on the connecting rod (1214), and a chamfer is arranged on the outer end of the abutting ring (1213).

8. An ORVR valve for an ORVR vacuum pump according to claim 4, wherein The movable piece (124) comprises a connecting sleeve (1241), a fixed plate (1242), a connecting piece (1243) and a positioning plate (1244), the connecting sleeve (1241), the fixed plate (1242) and the connecting piece (1243) are fixedly connected in sequence and are provided with an inserted passage in the interiors thereof, the number of the positioning plates (1244) is plural, all the positioning plates (1244) are distributed along the circumferential direction of the connecting piece (1243), a part of the positioning plates (1244) is fixedly connected with the connecting piece (1243), the other part of all the positioning plates (1244) exceeds the connecting piece (1243) and is connected, and the spring (123) is sleeved on the positioning plates (1244).

9. An ORVR valve for an ORVR vacuum pump according to claim 8, characterized in that, The positioning plate (1244) comprises a fixed segment (12441), a connecting segment (12442) and a limiting segment (12443), the fixed segment (12441) is fixedly connected with the connecting piece (1243), the connecting segment (12442) is fixedly connected on the inner side of the end of the fixed segment (12441), the limiting segment (12443) is fixedly connected on the outer side of the end of the fixed segment (12441), the connecting segments (12442) on all the positioning plates (1244) are fixedly connected, and the limiting segments (12443) abut against the other end of the spring (123).

10. An ORVR valve for an ORVR vacuum pump of claim 1, wherein, The interfaces on the air inlet three-way joint (2) and the air outlet three-way joint (3) are provided with external threads, the oil gun pipeline (4), the oil tank pipeline (5), the air suction pipeline (61) and the air exhaust pipeline (62) are provided with locking nuts, and the locking nuts are threadedly connected with the external threads.

Images