Oil and gas recovery device

Abstract

The utility model relates to the technical field of oil gas recovery, especially relates to an oil gas recovery device, including motor, pump and casing, and motor and pump are installed in the casing, the casing includes first casing, second casing and third casing, and first casing and third casing are fixed at the both ends of second casing, the second casing includes motor part and pump body part, and the motor part and pump body part are integral type structure, the motor part is provided with first via, the pump body part is provided with second via, and first via and second via are coaxial, the utility model discloses second casing makes the eccentricity of motor part and pump body part fixed when processing, and the motor shaft hole of two components on second casing is once processing forming, guarantees the coaxial degree of two component motor shaft hole and effectively eliminates the cumulative error of processing, assembly, improves the use performance and explosion -proof safety of oil gas recovery pump, and provides greater installation space for wiring bin.

Description

Technical Field

[0001] This utility model relates to the technical field of oil and gas recovery, and in particular to an oil and gas recovery device. Background Technology

[0002] The vapor recovery pump is the core component of a vapor recovery system. Its function is to efficiently and reliably recover the oil vapors generated during refueling into the fuel tank through vacuum suction, preventing the escape of oil vapors from the vehicle's fuel tank and causing environmental pollution. The vapor recovery pump mainly consists of a motor and a pump body. The motor shaft is connected to the moving components inside the pump body, driving the movement of these components to generate vacuum suction, thus achieving the functions of air intake and exhaust.

[0003] Taking the NP-type oil-gas recovery pump as an example, the main components of the pump body include a (magnetic) rotor and an impeller. The rotor can roll and displace within the impeller's groove. The motor, through a through-hole in the front cover of the motor and the lower cover of the pump body, is coaxially linked with the impeller, providing power to drive the impeller to rotate within the pump chamber. The motor shaft is not at the center point within the pump body, causing the impeller to be in an eccentric position within the pump body, creating near-end and far-end relationships with the inner wall of the pump body. This causes the impeller to drive the rotor to reciprocate along the impeller groove under the action of centrifugal force and magnetic repulsion, changing the volume of the impeller groove and achieving air intake and exhaust. The through-holes on the front cover of the motor and the lower cover of the pump body are eccentric relative to the geometric center of their respective end covers. During installation, it is essential to ensure the coaxiality of the through-holes in the lower cover of the pump body and the front cover of the motor.

[0004] In the existing technology, the motor front cover and the pump body lower cover are processed separately and then assembled. Because the motor shaft through hole of the motor front cover and the pump body lower cover is eccentric relative to the geometric center of the end cover itself, and the coaxiality of the through hole of the pump body lower cover and the through hole of the motor front cover must be ensured during installation, separate processing inevitably leads to cumulative errors in processing dimensions, and cumulative assembly errors of various components during assembly. This will aggravate the superposition of deviations in parallelism and perpendicularity of the motor shaft, the pump body lower cover and the motor front cover, reduce the performance of the pump body, and also cause problems such as high motor load and high equipment operating temperature, which is not conducive to the explosion-proof safety of gas stations. Utility Model Content

[0005] In order to improve the cumulative error problem caused by the machining and assembly of the motor shaft through hole of the eccentric motor front cover and pump body lower cover in the current oil and gas recovery device, the purpose of this utility model is to provide an oil and gas recovery device that integrates the motor front cover and pump body lower cover into one design, which can avoid the eccentric error of the motor shaft through hole, and the parallelism and perpendicularity errors of the connection between the pump body and the motor base.

[0006] To achieve the objectives of this utility model, the present utility model provides an oil and gas recovery device, which adopts the following technical solution: An oil and gas recovery device includes a motor, a pump, and a housing. The motor and the pump are installed inside the housing, and the motor drives the pump to move. The housing includes a first housing, a second housing, and a third housing. The first housing and the third housing are fixed to both ends of the second housing. The second housing includes a motor section and a pump body section, which are disposed opposite to each other and are integral structures. The motor section is fixed to the first housing for mounting the motor, and the pump body section is fixed to the third housing for mounting the pump. The motor section has a first through hole, and the pump body section has a second through hole. The first through hole and the second through hole are coaxially arranged.

[0007] By adopting the above technical solution, the motor section (which serves as the front cover of the motor) and the pump body section (which serves as the lower cover of the pump body) are designed as a single unit. Then, the first and second through holes are simultaneously machined on this single unit, according to eccentricity requirements, ensuring the coaxiality of the first and second through holes and resolving the cumulative dimensional errors caused by separate perforations in the motor front cover and pump body lower cover. Furthermore, by making the motor front cover and pump body lower cover a single unit with a fixed eccentricity, assembly is eliminated, and the pump body and motor base no longer have mounting surfaces, eliminating the previously inevitable cumulative assembly errors. This significantly reduces the high requirements for machining accuracy and dimensional stability of the two key components, and avoids eccentricity errors in the motor shaft through holes, as well as parallelism and perpendicularity errors in the pump-motor connection. This ensures reliable operation of the components inside the pump that receive motor shaft transmission, avoids additional wear caused by unstable factors such as component installation and dimensional inconsistencies, and reduces heat generated by wear, thereby ensuring production consistency, improving quality reliability, and enhancing the explosion-proof safety of the operating environment.

[0008] The implementation can include any or all of the following features.

[0009] In some embodiments, the second housing is provided with a wiring compartment, the wiring compartment including a compartment body and a cover plate, the cover plate being fixed to the compartment body; the interior of the compartment body is a cavity, and the cover plate is provided with a first wire-passing hole, the first wire-passing hole communicating with the cavity.

[0010] In the above technical solution, the second housing, which is formed by the integrated design of the motor front cover and the pump body lower cover, provides a structural platform for further improvement of the oil and gas recovery pump. The wiring compartment on the second housing provides sufficient and stable design space compared to the original wiring method on the motor front cover, and provides a safe and explosion-proof installation space for accommodating cables and electrical control modules.

[0011] In some embodiments, a wiring section is provided inside the cavity, one end of which is connected to the motor, and the other end is provided with a second interface. An external cable is connected to a first interface at one end inside the cavity, and the first interface and the second interface are plugged in and matched.

[0012] Through the above technical solution, the external cable can be quickly connected and disconnected from the motor in the wiring compartment using the first and second interfaces, which can effectively reduce the time for maintenance and disassembly / replacement of the oil and gas recovery pump, significantly shorten the downtime of gas station equipment maintenance, and improve economic efficiency.

[0013] In some embodiments, a conduit is fixed on the cover plate, the first through hole passes through the conduit, a seal is installed inside the conduit, the outer peripheral wall of the seal abuts against the inner peripheral wall of the conduit, and the inner peripheral wall of the seal abuts against the outer peripheral wall of the external cable.

[0014] In some embodiments, the outer cable is sheathed with a corrugated tube, one end of the conduit is fixed to the cover plate, and the other end is fixed to the corrugated tube. In some embodiments, a gap is provided between the end faces of the motor section and the pump body section that are close to each other, the motor section and the pump body section are located on opposite sides of the chamber, one side of the chamber is integrally connected to the motor section, and the other side is integrally connected to the pump body section.

[0015] The above technical solution can further increase the installation space on the second housing and increase the volume of the wiring compartment.

[0016] In some embodiments, a connector is provided between the motor part and the pump body part, with one end of the connector integrally connected to the motor part and the other end integrally connected to the pump body part.

[0017] In some embodiments, the connector and the housing are respectively disposed at two radially opposite ends of the second housing, with the housing located above the connector.

[0018] The above technical solution helps to improve the stability of the second housing structure by setting a gap between the connector and the wiring compartment in the motor part and the pump body part, and can also increase the volume of the wiring compartment by combining the gap.

[0019] In some embodiments, a first support member is fixed to the connector, the first support member protruding from the lower end face of the connector, and the lower end face of the motor part is above the lower end face of the first support member.

[0020] In some embodiments, a second support member is fixed to the motor unit, the second support member is located on both sides of the first support member, and the lower end surface of the second support member is in the same plane as the lower end surface of the first support member.

[0021] Through the above technical solution, the first support and the second support can provide stable support during the operation of the oil and gas recovery pump, ensuring that the equipment will not move or tilt during operation.

[0022] In summary, this utility model provides an oil and gas recovery device with the following beneficial effects: First, by replacing the original separate motor front cover and pump body lower cover with an integrated second housing, the eccentricity of the motor and pump body is kept consistent during processing. Furthermore, the motor shaft through holes of the motor and pump body can be machined in one go, ensuring coaxiality. This effectively eliminates the cumulative dimensional errors caused by separate processing and assembly in the traditional separate structure, reduces the high requirements for processing accuracy and dimensional stability, reduces component wear and heat generation caused by installation and unstable dimensional stability, ensures the performance of the oil and gas recovery pump, and improves explosion-proof safety.

[0023] Secondly, integrating the front cover of the motor and the lower cover of the pump body into one piece provides ample installation space for the oil and gas recovery pump. A larger wiring compartment can be integrated into the second housing, providing a safe and explosion-proof installation space for more wires and electronic components. This facilitates a more intelligent and explosion-proof design for the oil and gas recovery pump. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the oil and gas recovery pump of this utility model; Figure 2 This is a front view schematic diagram of the connection between the second housing and the first housing of this utility model; Figure 3 This is a schematic diagram of the connection between the second shell and the first shell of this utility model from another perspective; Figure 4 This is a schematic diagram of the connection structure between the cover plate and the external cable of this utility model; Figure 5 This is a schematic diagram of the connection structure between the second shell and the first shell, which is hidden by the cover plate of this utility model; Figure 6 This is a schematic cross-sectional view of the internal structure of the conduit of this utility model.

[0025] Explanation of reference numerals in the attached figures: 1. Shell; 11. First shell; 12. Second housing; 121. Motor section; 1211. First through hole; 1212. Second support member; 122. Pump body section; 1221. Second through hole; 123. Spacing; 124. Wiring compartment; 1241. Compartment body; 1242. Cover plate; 12421. Conduit; 12422. First wiring hole; 125. Connector; 1251. First support member; 13. Third shell; 2. Motor; 21. Motor shaft; 3. Pump; 4. External cable; 41. First interface; 5. Wiring section; 51. Second interface; 6. Seals; 61. Gaskets; 62. Sheaths; 7. Tighten the nut. Detailed Implementation

[0026] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, back, bottom, and top, are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present utility model.

[0027] This utility model discloses an oil and gas recovery device, referring to... Figure 1 It includes a motor 2 and a pump 3. The motor shaft 21 of the motor 2 is coaxially fixed with the rotor of the pump 3 (not shown in the figure). The output torque of the motor shaft 21 drives the rotor of the pump 3 to rotate.

[0028] Reference Figure 1Motor 2 and pump 3 are installed in housing 1. Housing 1 includes a first housing 11, a second housing 12, and a third housing 13. The first housing 11 is fixed to one axial end of the second housing 12, and the third housing 13 is fixed to the other axial end of the second housing 12. The first housing 11 and the third housing 13 are arranged opposite each other. The second housing 12 includes a motor part 121 and a pump body part 122, which are located on opposite sides of the second housing 12 and are an integral structure. The motor part 121 is fixed to the first housing 11, and the internal space formed after the motor part 121 and the first housing 11 are fixed is used to install motor 2. The pump body part 122 is fixed to the third housing 13, and the internal space formed after the pump body part 122 and the third housing 13 are fixed is used to install pump 3.

[0029] Reference Figure 2 The motor section 121 has a first through hole 1211, the central axis of which is horizontal and eccentrically horizontal to the central axes of the motor section 121 and the first housing 11. The pump body section 122 has a second through hole 1221, the central axis of which is horizontal and collinear with the central axis of the first through hole 1211. (Refer to...) Figure 3 The central axis of the second through hole 1221 is horizontally eccentric to the central axes of the pump body 122 and the third housing 13, as described above. This horizontal eccentricity can range from 1mm to 4mm. The first through hole 1211 and the second through hole 1221 are used to pass through the motor shaft 21, ensuring that the rotation center of the motor shaft 21 is horizontally eccentric to the geometric center of the pump body 122 and the third housing 13. The first through hole 1211 and the second through hole 1221 are machined in one continuous pass from one end of the second housing 12 to the other, reducing machining steps and avoiding accumulated machining errors.

[0030] Reference Figure 2 A gap 123 is provided between the end faces of the motor section 121 and the pump body section 122 that are close to each other. A wiring compartment 124 and a connector 125 are simultaneously fixed on the radially opposite sides of the motor section 121 and the pump body section 122, with the wiring compartment 124 located above the connector 125. The wiring compartment 124 includes a compartment body 1241 and a cover plate 1242, with the cover plate 1242 detachably fixed to the upper end of the compartment body 1241. One end of the compartment body 1241 facing the motor section 121 is integrally fixed to the upper end of the motor section 121, and the other end facing the pump body section 122 is integrally fixed to the upper end of the pump body section 122 across the gap 123. One end of the connector 125 in the longitudinal direction is integrally fixed to the end face of the motor section 121, and the other end is integrally fixed to the lower radial end of the pump body section 122 across the gap 123. (Refer to...) Figure 3A first support member 1251 is fixed to the middle of the connector 125. The first support member 1251 protrudes from the lower end face of the connector 125, and the lower end face of the motor part 121 is located above the lower end face of the first support member 1251. Two second support members 1212 are fixed to the motor part 121, symmetrically located on both sides of the first support member 1251. The lower end face of the second support member 1212 is on the same plane as the lower end face of the first support member 1251. The first support member 1251 and the second support member 1212 simultaneously provide support for the oil and gas recovery pump, ensuring that the oil and gas recovery pump is horizontally arranged in the operating environment.

[0031] Reference Figure 3 A conduit 12421 is provided on the cover plate 1242, and a first threading hole 12422 is opened inside the conduit 12421. The first threading hole 12422 passes through the conduit 12421 axially. The interior of the compartment 1241 is a hollow cavity, and the first threading hole 12422 communicates with the cavity. (Refer to...) Figure 4 The external cable 4, which connects to the fuel dispenser and the vapor recovery device, and the wire introduced into the housing 1241 from inside the motor 2 are connected inside the housing 1241. One end of the wire inside the motor 2 is inside the cavity of the wiring compartment 124, and the other end is connected to the stator inside the motor 2. The external cable 4 enters the cavity of the wiring compartment 124 from the first through hole 12422 of the through pipe 12421.

[0032] Reference Figure 4 Preferably, the internal wiring of the motor 2 and the external cable 4 are connected via a plug-in interface. Specifically, one end of the external cable 4 located inside the cavity is connected to a first interface 41, as shown in the reference. Figure 5 A wiring part 5 is fixed inside the cavity. One end of the wiring part 5 inside the cavity is connected to a second interface 51. The first interface 41 and the second interface 51 are plugged in and matched. The other end of the wiring part 5 extends out of the cavity and is connected to the motor 2.

[0033] Reference Figure 6The conduit 12421 is fixed to the cover plate 1242, and a seal 6 and a clamping nut 7 are installed inside the conduit 12421. The external cable 4 is introduced into the chamber 1241 through the seal 6 and the clamping nut 7. After the clamping nut 7 is screwed onto the conduit 12421, it compresses the seal 6, causing it to deform and expand radially, thus tightly abutting against the external cable 4 and the inner circumferential wall of the conduit 12421. At the oil and gas recovery device end, the external cable 4 passes through the clamping nut 7 and the seal 6 of the conduit 12421 into the cavity and is inserted into the second interface 51. The outer circumferential wall of the external cable 4 abuts against the inner circumferential wall of the seal 6. The clamping nut 7 can be a double-threaded connector; for example, the inner wall of the conduit 12421 opening has an internal thread, and one axial end of the clamping nut 7 has an external thread that matches the internal thread of the conduit 12421, thus fixing the clamping nut 7 and the conduit 12421. The external cable 4 is fitted with a corrugated tube, and the other end of the clamping nut 7 has an external thread that matches the connector of the corrugated tube. The connector of the corrugated tube and the clamping nut 7 are threadedly connected to meet the installation requirements of the fuel dispenser cable. The selection and design of the seal 6 and the clamping nut 7 must comply with the relevant explosion-proof safety requirements in GB / T3836.1 and GB / T 3836.2.

[0034] Currently, the external cables of the vapor recovery unit are inseparable from the motor as motor wires. The fuel dispenser design requires that the hydraulic area cables be guided to the explosion-proof layer using corrugated conduits and sealed with components before being led into the fuel dispenser's electrical box and connected to the control unit. Replacing the vapor recovery unit requires disassembling and reassembling the external cables, corrugated conduits, the fuel dispenser's explosion-proof layer seals, and the control unit's connectors. After replacing the vapor recovery unit and reinstalling these components, the corrugated conduits also need to be reorganized, resulting in prolonged replacement and maintenance time. Furthermore, the fuel dispenser's wiring connections involve multiple wires, requiring personnel to accurately identify the external cables from among them.

[0035] The oil and gas recovery device provided in this application has a wiring compartment 124 that provides an explosion-proof and sealed safety space for the plug-in connection of the external cable 4 and the motor 2. When replacing the device, it is not necessary to disassemble and install the entire set of external cables and accessories on the fuel dispenser with complex electrical connections, nor is it necessary to disassemble and install the clamping nut 7, seal 6 and bellows on this device. The external cable 4, clamping nut 7, seal 6 and the bellows and cover plate 1242 sleeved on the external cable 4 are integrated as a whole. The external cable and bellows maintain the factory standard at the fuel dispenser end and maintain the original connection with the cover plate at the oil and gas recovery vacuum device end. It is only necessary to open the cover plate 1242 of the wiring compartment 124 and quickly connect and disconnect the external cable 4 and the motor 2 by plugging and unplugging the second interface 51 and the first interface 41. Then, the cover plate 1242 is sealed and installed on the compartment body 1241 of the wiring compartment 124 of the replaced device. This greatly simplifies the disassembly and assembly process of the external cable 4, shortens the disassembly and assembly time of the oil and gas recovery device, and also eliminates the situation of accidental disconnection due to incorrect wire identification.

[0036] Reference Figure 5 With the integrated design of the motor front cover and the pump lower cover, the installation space on the second housing 12 is larger, allowing for the design of a more redundant wiring compartment 124. In some embodiments, a PCBA board as a wiring section 5 can be installed inside the large-volume wiring compartment 124, integrating the second interface 51 onto the PCBA board. The first interface 41 can be connected and disconnected from the motor 2 by plugging and unplugging the second interface 51. In some embodiments, at least one sensor for monitoring its operating condition can also be installed on the pump 3 or the motor 2. The signal output terminal of the sensor is electrically connected to the signal input terminal on the PCBA board. Based on the signal transmitted from the sensor, the PCBA board performs safety monitoring and intelligent control of the oil and gas recovery pump. Through this real-time monitoring and active safety protection, the oil and gas recovery pump meets higher explosion-proof safety requirements. In some implementations, a communication interface can be built into the PCBA board. This communication interface can be used to establish digital communication between the PCBA board and the control board of the fuel dispenser control section, forming a centralized control system in which a single fuel dispenser control board manages multiple vapor recovery pumps. This enables one fuel dispenser control board to control multiple vapor recovery devices, effectively reducing the amount of materials required for vapor recovery devices, simplifying the design complexity of the fuel dispenser electrical box, and significantly reducing installation material costs and maintenance labor hours due to the reduction of connectors and the simplification of wiring.

[0037] Of course, the above embodiments are the preferred embodiments of this utility model, and are only used to illustrate the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly, and should not be used to limit the protection scope of this utility model. All modifications made in accordance with the spirit and essence of the main technical solution of this utility model should be included within the protection scope of this utility model.

Claims

1. An oil and gas recovery device, characterized in that, The device includes a motor, a pump, and a housing. The motor and the pump are installed inside the housing, and the motor drives the pump to move. The housing includes a first housing, a second housing, and a third housing. The first housing and the third housing are fixed to both ends of the second housing. The second housing includes a motor section and a pump body section, which are disposed opposite to each other and are an integral structure. The motor section is fixed to the first housing for mounting the motor, and the pump body section is fixed to the third housing for mounting the pump. The motor section has a first through hole, and the pump body section has a second through hole. The first through hole and the second through hole are coaxially arranged.

2. The oil and gas recovery device as described in claim 1, characterized in that, The second housing is provided with a wiring compartment, which includes a compartment body and a cover plate. The cover plate is fixed on the compartment body. The interior of the compartment body is a cavity. The cover plate is provided with a first wire-passing hole, which communicates with the cavity.

3. The oil and gas recovery device as described in claim 2, characterized in that, The cavity is provided with a wiring part, one end of which is connected to the motor, and the other end is provided with a second interface. The end of the external cable located in the cavity is connected to a first interface, and the first interface and the second interface are plugged in and matched.

4. The oil and gas recovery device as described in claim 2, characterized in that, A conduit is fixed on the cover plate, the first through hole passes through the conduit, a seal is installed inside the conduit, the outer peripheral wall of the seal abuts against the inner peripheral wall of the conduit, and the inner peripheral wall of the seal abuts against the outer peripheral wall of the external cable.

5. The oil and gas recovery device as described in claim 4, characterized in that, The outer cable is sheathed with a corrugated tube, one end of the conduit is fixed to the cover plate, and the other end is fixed to the corrugated tube.

6. The oil and gas recovery device as described in claim 2, characterized in that, A gap is provided between the end faces of the motor section and the pump body section that are close to each other. The motor section and the pump body section are located on opposite sides of the chamber. One side of the chamber is integrally connected to the motor section, and the other side is integrally connected to the pump body section.

7. The oil and gas recovery device as described in claim 6, characterized in that, A connector is also provided between the motor part and the pump body part. One end of the connector is integrally connected to the motor part, and the other end is integrally connected to the pump body part.

8. The oil and gas recovery device as described in claim 7, characterized in that, The connector and the housing are respectively disposed at two radially opposite ends of the second housing, with the housing located above the connector.

9. The oil and gas recovery device as described in claim 8, characterized in that, A first support member is fixed to the connector, the first support member protruding from the lower end face of the connector, and the lower end face of the motor part is above the lower end face of the first support member.

10. An oil and gas recovery device as described in claim 9, characterized in that, A second support member is fixed on the motor part. The second support member is located on both sides of the first support member, and the lower end surface of the second support member is on the same plane as the lower end surface of the first support member.

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