Oil gas recovery pump

Abstract

The oil gas recovery pump comprises a vacuum pump and a pump base, the vacuum pump comprises a pump main shaft with the first end extending out of the pump base and a housing coaxially arranged at the second end of the pump main shaft, and the outer wall of the housing is connected with the pump base through a bearing assembly. The bottom of the pump base is detachably connected with a connecting base capable of axially abutting against the bearing assembly so that the bearing assembly can be axially fixed into the pump base. The bottom of the pump base is detachably connected with the connecting base, the connecting base abuts against the bearing assembly located between the housing and the pump base, and the axial direction of the bearing assembly is limited, so that in the rotating process of the pump main shaft and the housing, the bearing is prevented from moving on the housing in the axial direction; and the service life of the vacuum pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas recovery, in particular to an oil and gas recovery pump. Background Art

[0002] Light oils used in petroleum-based machinery, especially gasoline, are highly volatile. During the refueling process, large amounts of oil vapor are inevitably released. This vaporization can cause environmental pollution, fire hazards, personal injury, and resource waste. As oil is a non-renewable energy source, closed-loop recovery of this vapor is imperative.

[0003] The recovery of oil and gas in a gas station usually involves installing an oil and gas recovery pump inside the gas station. The air inlet of the oil and gas recovery pump is connected to the oil and gas recovery type fueling gun, and the air outlet of the oil and gas recovery pump is connected to the oil storage tank through an oil and gas recovery pipeline.

[0004] The bearing assembly in the vacuum pump of the existing oil and gas recovery pump is located between the cover and the pump seat to achieve radial limitation of the cover during rotation. The existing oil and gas recovery pump lacks axial positioning of the bearing, which causes a certain amount of deviation of the bearing along the axial direction of the cover during operation of the cover, which will affect the operating stability of the vacuum pump and shorten the service life of the vacuum pump.

[0005] Therefore, how to prevent the bearing from moving along the axial direction on the housing to improve the stability of the vacuum pump operation and extend the service life of the vacuum pump has become a technical problem that needs to be urgently solved by those skilled in the art. Utility Model Content

[0006] The purpose of the utility model is to provide an oil and gas recovery pump, which can prevent the bearing from moving along the axial direction on the cover, so as to improve the stability of the vacuum pump operation and extend the service life of the vacuum pump.

[0007] To achieve the above-mentioned purpose, the utility model provides an oil and gas recovery pump, including a vacuum pump and a pump seat. The vacuum pump includes a pump main shaft with a first end extending out of the pump seat, and a cover shell coaxially arranged at the second end of the pump main shaft. The outer wall of the cover shell is connected to the pump seat through a bearing assembly, and the bottom of the pump seat is detachably connected to a connecting seat that can axially abut against the bearing assembly so that the bearing assembly is axially fixed inside the pump seat.

[0008] Preferably, the bearing assembly includes a bearing and an isolation block, wherein an isolation block is provided between two adjacent bearings, and the bearing and the isolation block are both sleeved on the outer wall of the housing, the inner ring of the bearing is connected to the housing, and the outer ring of the bearing is connected to the pump seat;

[0009] The connecting seat includes a connecting portion and an abutting portion, both of which are annular structures. The connecting portion is connected to the pump seat, and the abutting portion is vertically connected to the inner ring of the connecting portion. The inner diameter of the abutting portion is smaller than the outer diameter of the bearing so as to abut against the outer ring of the bearing.

[0010] Preferably, the cover includes a third end away from the pump main shaft, the third end is provided with an annular protrusion extending radially toward the abutment portion and spaced apart from the abutment portion, the outer diameter of the annular protrusion is larger than the inner diameter of the bearing so as to abut against the inner ring of the bearing.

[0011] Preferably, it further comprises a motor, a coupling is provided at the end of the rotating shaft of the motor, the coupling is located in the housing, and the pump head claw disc of the coupling is connected to the pump main shaft.

[0012] Preferably, the housing further comprises a fourth end facing away from the third end, the fourth end comprising an annular plate connected to the pump main shaft and the outer wall of the housing, the plate being provided with a plurality of mounting holes whose axes are parallel to the pump main shaft, and two spaced apart positioning posts being provided on a side of the plate facing the rotating shaft;

[0013] A connecting hole corresponding to the mounting hole and a positioning hole corresponding to the positioning column for the positioning column to pass through are provided on the side of the pump head claw plate facing the plate body, so that the pump head claw plate and the pump main shaft can be detachably connected.

[0014] Preferably, the two positioning posts are cylindrical structures with semicircular bottom surfaces, and the sides of the two positioning posts facing each other are parallel to each other.

[0015] Preferably, there are three mounting holes, and the mounting holes are evenly arranged along the circumference of the plate body.

[0016] Preferably, the vacuum pump further comprises a flower wheel, which is a hollow flower wheel and is keyed to the first end of the pump main shaft.

[0017] Preferably, the coupling is a plum blossom coupling.

[0018] With respect to the above-mentioned background technology, the oil and gas recovery pump provided by the present invention includes a vacuum pump and a pump seat. The vacuum pump includes a pump main shaft with a first end extending out of the pump seat, and a cover shell coaxially arranged at the second end of the pump main shaft. The outer wall of the cover shell is connected to the pump seat through a bearing assembly. The bottom of the pump seat is detachably connected to a connecting seat that can axially abut against the bearing assembly so that the bearing assembly is axially fixed inside the pump seat. This solution detachably connects a connecting seat to the bottom of the pump seat, and the connecting seat abuts against the bearing assembly located between the cover shell and the pump seat to limit the axial direction of the bearing assembly, so that during the rotation of the pump main shaft and the cover shell, the bearing is prevented from moving along the axial direction on the cover shell, thereby improving the stability of the vacuum pump operation and extending the service life of the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of an oil and gas recovery pump provided by an embodiment of the utility model;

[0021] Figure 2 for Figure 1 A partial enlarged view of

[0022] Figure 3 A schematic structural diagram of a connecting base provided in an embodiment of the present utility model;

[0023] Figure 4 for Figure 3 The main view;

[0024] Figure 5 for Figure 4 Structural cross-section along AA;

[0025] Figure 6 A schematic diagram of the structure of the pump head claw disc provided by an embodiment of the utility model;

[0026] Figure 7 for Figure 6 Rear view;

[0027] Figure 8 for Figure 7 Structural cross-section along BB;

[0028] Figure 9 A schematic structural diagram of a pump main shaft and a housing provided by an embodiment of the utility model;

[0029] Figure 10 for Figure 9 Bottom view of

[0030] Figure 11 for Figure 9 The main view;

[0031] Figure 12 for Figure 11 Structural cross-section along CC;

[0032] Figure 13 A schematic structural diagram of a pump base provided by an embodiment of the present utility model;

[0033] Figure 14 for Figure 13 Bottom view of

[0034] Figure 15 for Figure 14 Structural cross-section view along DD.

[0035] in:

[0036] 100- pump main shaft;

[0037] 200-cover, 210-annular protrusion, 220-plate, 230-mounting hole, 240-positioning column;

[0038] 300-pump seat, 310-installation position;

[0039] 400-connecting seat, 410-connecting portion, 420-abutting portion;

[0040] 500-bearing;

[0041] 600-isolation block;

[0042] 700-pump head claw plate, 710-connection hole, 720-positioning hole;

[0043] 800-flower wheel;

[0044] 900-motor, 910-rotating shaft, 920-mounting platform. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0047] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limitations of the present invention.

[0048] The purpose of the present utility model is to provide an oil and gas recovery pump, which can prevent the bearing 500 from moving along the axial direction on the cover 200, so as to improve the stability of the vacuum pump operation and extend the service life of the vacuum pump.

[0049] See also Figures 1 to 3 To achieve the above-mentioned purpose, the utility model provides an oil and gas recovery pump, including a vacuum pump and a pump base 300. The vacuum pump includes a pump main shaft 100, a first end of which extends out of the pump base 300, and a cover shell 200 coaxially arranged at the second end of the pump main shaft 100. The outer wall of the cover shell 200 is connected to the pump base 300 through a bearing 500 assembly. The bottom of the pump base 300 is detachably connected to a connecting seat 400 that can axially abut against the bearing 500 assembly, so that the bearing 500 assembly is axially fixed inside the pump base 300.

[0050] In this solution, a connecting seat 400 is detachably connected to the bottom of the pump seat 300. The connecting seat 400 abuts against the bearing 500 assembly located between the cover 200 and the pump seat 300, thereby limiting the axial direction of the bearing 500 assembly. This prevents the bearing 500 from moving along the axial direction on the cover 200 during the rotation of the pump main shaft 100 and the cover 200, thereby improving the stability of the vacuum pump operation and extending the service life of the vacuum pump.

[0051] See also Figure 4 and Figure 5 In this embodiment, the bearing 500 assembly includes a bearing 500 and an isolation block 600. An isolation block 600 is arranged between two adjacent bearings 500. The bearing 500 and the isolation block 600 are both sleeved on the outer wall of the cover 200. The inner ring of the bearing 500 is connected to the cover 200, and the outer ring of the bearing 500 is connected to the pump seat 300; the connecting seat 400 includes a connecting portion 410 and an abutting portion 420, both of which are annular structures. The connecting portion 410 is connected to the pump seat 300, and the abutting portion 420 is vertically connected to the inner ring of the connecting portion 410, and the inner diameter of the abutting portion 420 is smaller than the outer diameter of the bearing 500, so as to abut against the outer ring of the bearing 500.

[0052] See also Figures 13 to 15 It can be understood that a mounting position 310 for installing the connecting seat 400 is provided at the bottom of the pump seat 300. Through the threaded holes corresponding to the mounting position 310 and the connecting portion 410 in the connecting seat 400, the connecting seat 400 can be detachably connected to the pump seat 300 after the screw is passed through. At the same time, the abutment portion 420 in the connecting seat 400 can axially abut against the outer ring of the bearing 500 to limit the axial position of the bearing 500.

[0053] See also Figure 9 and Figure 11The cover 200 includes a third end facing away from the pump main shaft 100, and the third end is provided with an annular protrusion 210 extending radially toward the abutment portion 420 and spaced apart from the abutment portion 420. The outer diameter of the annular protrusion 210 is larger than the inner diameter of the bearing 500 so as to abut against the inner ring of the bearing 500. The abutment portion 420 abuts against the outer ring of the bearing 500, and the annular protrusion 210 abuts against the inner ring of the bearing 500 to prevent the bearing 500 from moving along the axial direction on the cover 200.

[0054] It should be noted that the oil and gas recovery pump also includes a motor 900, and a coupling is provided at the end of the rotating shaft 910 of the motor 900. The coupling is located in the cover 200, and the pump head claw plate 700 of the coupling is connected to the pump main shaft 100. The rotating shaft 910 drives the cover 200 and the pump main shaft 100 to rotate around its own axis through the coupling. The cover 200 and the pump main shaft 100 can be an integral structure to improve the consistency of their operation. The end of the motor 900 is also provided with a mounting platform 920 that can fit the side of the connecting part 410 away from the cover 200. The mounting platform 920 can further limit the position of the connecting part 410 to prevent it from loosening in the axial direction. At the same time, the annular protrusion 210 and the mounting platform 920 are isolated to avoid affecting the rotation of the cover 200.

[0055] See also Figure 10 and Figure 12 In some embodiments, the cover 200 further includes a fourth end facing away from the third end, and the fourth end includes a circular plate 220 connected to the pump main shaft 100 and the outer wall of the cover 200. The plate 220 is provided with a plurality of mounting holes 230 whose axes are parallel to the pump main shaft 100, and two spaced apart positioning columns 240 are provided on the side of the plate 220 facing the rotating shaft 910.

[0056] See also Figures 6 to 8 The pump head claw plate 700 is provided with a connecting hole 710 corresponding to the mounting hole 230 on the side facing the plate body 220, and a positioning hole 720 corresponding to the positioning column 240 for the positioning column 240 to pass through, so that the pump head claw plate 700 and the pump main shaft 100 can be detachably connected.

[0057] Two positioning columns 240 are passed through the corresponding positioning holes 720 to radially position the pump head claw plate 700 and the plate body 220 to limit the relative rotation of the pump head claw plate 700 and the plate body 220. Then, they are connected to the corresponding mounting holes 230 and connecting holes 710 through bolts to axially position the pump head claw plate 700 and the plate body 220 to avoid relative movement of the pump head claw plate 700 and the plate body 220, so as to increase the stability of the operation of the pump main shaft 100 and the cover shell 200.

[0058] Preferably, the two positioning columns 240 are specifically cylindrical structures with a semicircular bottom surface, and the two facing sides of the two positioning columns 240 are parallel to each other, or an "I"-shaped groove structure can be set on the column, and an "I"-shaped convex plate structure adapted to the "I"-shaped groove structure is set in the through hole of the pump head claw plate 700 for installing the column. In addition, there are three mounting holes 230, and the mounting holes 230 are evenly arranged along the circumference of the plate body 220. The "I"-shaped groove structure, the "I"-shaped convex plate structure, the mounting holes 230 and the connecting holes 710 are used to shorten the length of the coupling, increase the installation tightness, and also reduce the difficulty of the processing technology.

[0059] In this embodiment, the vacuum pump further includes a hollowed-out flower wheel 800 that is keyed to the first end of the pump main shaft 100. Sliders are evenly distributed around the circumference of the flower wheel 800. The flower wheel 800 is provided with mounting grooves for mounting the sliders. The mounting grooves extend from a position near the center of the flower wheel 800 toward the outer wall of the flower wheel 800, offset from the radial direction of the flower wheel 800. The notches of the mounting grooves are located on the outer circumference of the flower wheel 800, and multiple mounting grooves are evenly distributed around the circumference of the flower wheel 800.

[0060] The pump cover and pump seat 300 of the oil and gas recovery pump are respectively set at the two ends of the axial direction of the flower wheel 800. One end of the axial direction of the flower wheel 800 is against the pump cover, and the other end of the axial direction of the flower wheel 800 is against the pump seat 300. An upper wear-resistant plate is set between the flower wheel 800 and the pump cover, and a lower wear-resistant plate is set between the flower wheel 800 and the pump seat 300. A pump body is connected between the upper wear-resistant plate and the lower wear-resistant plate, and the pump body is arranged on the outer periphery of the pulley at intervals.

[0061] The sliding vanes of the Flower Wheel 800 are self-lubricating carbon sheets. These sheets offer excellent wear resistance and are environmentally friendly. The Flower Wheel 800 does not contact the pump body, end cap, or pump base 300, significantly extending the life of the vacuum pump and effectively reducing secondary oil and vapor recovery costs at gas stations.

[0062] The sliding vanes are made of wear-resistant materials, which greatly extends the service life of the vacuum pump and effectively reduces the cost of secondary oil and gas recovery at gas stations.

[0063] As the flower wheel 800 rotates, the vanes adhere tightly to the pump cavity wall under the influence of centrifugal force, forming multiple spaces between the flower wheel 800, the vanes, the pump cover, the pump cavity wall, and the pump base 300. These spaces gradually expand and contract along the circumference of the flower wheel 800. The spaces formed at the inlet end gradually increase, reaching their maximum near the outlet end, and their minimum near the outlet end. With each rotation of the flower wheel 800, the spaces formed expand and then decrease, completing a vacuum pump cycle. This ensures a high vacuum level and excellent operational stability during operation of the oil vapor recovery pump.

[0064] In some embodiments of the present application, the number of the sliding sheets is five, and the number of spaces formed is six.

[0065] The weight of the flower wheel 800 affects the torque and power of the vacuum pump. The heavier the flower wheel 800, the greater the power required by the motor 900, resulting in increased energy consumption by the oil and vapor recovery pump. To reduce the energy consumption of the oil and vapor recovery pump, the present application provides weight-reducing holes within the flower wheel 800 to form a hollow flower wheel 800, reducing the weight of the flower wheel 800. Given the same volume, the weight of the flower wheel 800 is reduced, thereby reducing the power required by the motor 900 and reducing the energy consumption of the oil and vapor recovery pump.

[0066] The specific method of opening the weight-reducing holes is selected by those skilled in the art according to actual needs and is not specifically limited here.

[0067] The coupling is a plum blossom coupling, consisting of a motor 900 claw plate, an elastomer, and a pump head claw plate 700 for connecting to the rotating shaft 910. These plates are constructed of 45-grade steel, while the elastomer is engineered plastic or rubber. The elastomer provides cushioning and vibration reduction. The motor 900 claw plate, elastomer, and pump head claw plate 700 can be designed in a plum blossom shape with three, four, six, eight, or ten petals. The plum blossom coupling boasts a simple structure, requires no lubrication, is easy to service, inspect, and maintain, is wear-resistant and oil-resistant, and offers excellent shock absorption, cushioning, and electrical insulation properties. Operating in temperatures from -35°C to +80°C, it fully meets the requirements of the oil and gas recovery pump's operating environment and can operate continuously for extended periods.

[0068] The transmission is connected through a plum blossom flexible coupling, which has good coaxiality compensation capability, overcomes the technical difficulty of ensuring the coaxiality of the separately arranged motor 900 and the pump main shaft 100 in the vacuum pump, can effectively reduce the noise and temperature during the operation of the vacuum pump, ensure the service life of the vacuum pump, and is easy to disassemble and assemble, fundamentally solving the problem that the existing oil and gas recovery pump with an integrated structure cannot be replaced or repaired separately and has high use costs.

[0069] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0070] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0071] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. An oil and gas recovery pump, characterized in that: It includes a vacuum pump and a pump seat, the vacuum pump includes a pump main shaft with a first end extending out of the pump seat, and a cover shell coaxially arranged at the second end of the pump main shaft, the outer wall of the cover shell is connected to the pump seat through a bearing assembly, and the bottom of the pump seat is detachably connected to a connecting seat that can axially abut against the bearing assembly to fix the bearing assembly axially inside the pump seat.

2. The oil and gas recovery pump according to claim 1, characterized in that: The bearing assembly includes a bearing and an isolation block, wherein the isolation block is arranged between two adjacent bearings, and the bearing and the isolation block are both sleeved on the outer wall of the housing, the inner ring of the bearing is connected to the housing, and the outer ring of the bearing is connected to the pump seat; The connecting seat includes a connecting portion and an abutting portion, both of which are annular structures. The connecting portion is connected to the pump seat, and the abutting portion is vertically connected to the inner ring of the connecting portion. The inner diameter of the abutting portion is smaller than the outer diameter of the bearing so as to abut against the outer ring of the bearing.

3. The oil and gas recovery pump according to claim 2, characterized in that: The cover includes a third end facing away from the pump main shaft, and the third end is provided with an annular protrusion radially extending toward the abutment portion and spaced apart from the abutment portion. The outer diameter of the annular protrusion is larger than the inner diameter of the bearing so as to abut against the inner ring of the bearing.

4. The oil and gas recovery pump according to claim 3, characterized in that: It also includes a motor, wherein a coupling is provided at the end of the rotating shaft of the motor, the coupling is located in the housing, and the pump head claw plate of the coupling is connected to the pump main shaft.

5. The oil and gas recovery pump according to claim 4, characterized in that: The housing further includes a fourth end facing away from the third end, the fourth end including an annular plate connected to the pump main shaft and the outer wall of the housing, the plate being provided with a plurality of mounting holes whose axes are parallel to the pump main shaft, and two spaced apart positioning posts being provided on a side of the plate facing the rotating shaft; The pump head claw plate is provided with a connecting hole corresponding to the mounting hole and a positioning hole corresponding to the positioning column for the positioning column to pass through on one side of the plate body, so that the pump head claw plate and the pump main shaft can be detachably connected.

6. The oil and gas recovery pump according to claim 5, characterized in that: The two positioning posts are specifically cylindrical structures with semicircular bottom surfaces, and the sides of the two positioning posts facing each other are parallel to each other.

7. The oil and gas recovery pump according to claim 5, characterized in that: There are three mounting holes, and the mounting holes are evenly arranged along the circumference of the plate body.

8. The oil and gas recovery pump according to any one of claims 1 to 7, characterized in that: The vacuum pump further comprises a flower wheel, which is a hollow flower wheel and is key-connected to the first end of the pump main shaft.

9. The oil and gas recovery pump according to claim 4, characterized in that: The coupling is a plum blossom coupling.

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