CN219344951U

CN219344951U - Oil gas recovery pump and oiling machine

Info

Publication number: CN219344951U
Application number: CN202320659559.XU
Authority: CN
Inventors: 林喜彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-07-14
Anticipated expiration: 2033-03-29

Abstract

The utility model discloses an oil gas recovery pump and an oiling machine, the design is ingenious in that a first connecting column and a second connecting column are arranged between a rotor and a first gasket and a second gasket, then a first accommodating groove and a second accommodating groove for accommodating the first connecting column and the second connecting column are correspondingly arranged on the rotor, wherein the upper end of the first connecting column is 0.02-1 mm higher than the upper end face of the rotor, the lower end of the second connecting column is 0.02-1 mm higher than the lower end face of the rotor, the first connecting column and the second connecting column can be contacted with the gasket when the rotor rotates at a high speed through the structural form, the rotor is prevented from being directly contacted with the gasket to be worn out excessively, and the first connecting column and the second connecting column are arranged in the accommodating groove in a detachable mode, so that the rotor and the first connecting column and the second connecting column can be maintained through replacing the connecting column after being worn out, the design is reliable in implementation, the maintenance cost is low, and the rotor durability is good.

Description

Oil gas recovery pump and oiling machine

Technical Field

The utility model relates to the technical field of pumps, in particular to an oil gas recovery pump and an oiling machine.

Background

The oil gas recovery of the oiling machine is used as the energy-saving and environment-friendly work of the oiling equipment which is relatively hot at present, the oil gas recovery pipeline is arranged on the oil gun of the oiling machine, the oil gas generated during oiling is sucked and recovered by combining the negative pressure device, so that the overflow of the oil gas during oiling of the oiling gun is avoided, the air cleanliness of a gas station can be effectively improved, the potential safety hazard of a large amount of oil gas can be eliminated on the other hand, the loss of available energy sources is reduced, although the market pin has some oil gas recovery pumps for the oiling machine at present, most of the oil gas recovery pumps for the oiling machine at present have more complex transmission structures, after the oil gas recovery pumps work for a long time, the equipment is required to be frequently maintained or replaced due to the abrasion of parts, and the traditional oil gas recovery pumps are complex in structure, in addition, in order to improve the negative pressure stability of the oil gas recovery pump, part of the oil gas recovery pump is provided with gaskets at the upper end and the lower end of the rotor to improve the matching tightness so as to reduce the pressure release and unstable pressure caused by the assembly clearance of parts, after the gaskets are added, the rotor is higher in the degree of fit with the gaskets, and when the rotor operates at a high speed, a certain degree of abrasion can occur, especially when the rotor works for a long time, after the temperature of the working environment of the rotor rises, the working matching friction is further increased due to the thermal expansion of the parts, so that the service life of the rotor is influenced, and the rotor is used as an important part of the oil gas recovery pump, so that the cost for replacing the rotor is higher, if the rotor can be structurally optimized, the direct abrasion of the rotor is reduced by adding a loss part, it will bring greater convenience to the use and maintenance of the oil and gas recovery pump and reduce the maintenance cost.

Disclosure of Invention

In view of the above, the utility model aims to provide an oil gas recovery pump and an oiling machine which are convenient to install, reliable to implement, long in service life of a rotor and convenient to maintain.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

an oil and gas recovery pump connected in an oil and gas recovery line of an oil and gas dispenser and for providing a negative pressure required for oil and gas recovery, comprising:

the first shell is of a cylindrical structure with two open ends;

the rotor is eccentrically arranged in the first shell, a first area and a second area which are communicated with each other are formed on two sides of the maximum distance part between the rotor and the inner wall of the first shell, and a plurality of radially extending slots are formed on the periphery of the rotor;

the blades are a plurality of blades, correspond to the slots on the rotor one by one and are arranged in the slots in a sliding way;

the base is fixedly connected with the lower end face of the first shell relatively;

the connecting seat is fixedly connected with the upper end face of the first shell, and a pair of air guide grooves which are oppositely arranged and are communicated with the first area and the second area in a one-to-one correspondence manner are arranged on the end face, close to the first shell, of the connecting seat;

the first gasket is arranged between the connecting seat and the upper end face of the first shell and separates the pair of air guide grooves, and the first gasket is provided with avoiding through grooves which are matched with the structure of the first gasket corresponding to the pair of air guide grooves;

the connecting joints are in a pair and are in one-to-one correspondence and are connected with the air guide grooves;

the power unit is arranged on one side of the base far away from the first shell, the power output end of the power unit penetrates through the base and the second gasket and is fixedly connected with the rotor, the power unit drives the rotor to rotate, blades which are arranged on the rotor in a sliding mode are enabled to rotate, gas in the first area is pushed to the second area and is output through the gas guide groove and the connecting joint corresponding to the second area, negative pressure is generated in the first area, or gas in the second area is pushed to the first area and is output through the gas guide groove and the connecting joint corresponding to the first area, and negative pressure is generated in the second area;

the second gasket is fixedly arranged between the lower end face of the first shell and the upper end face of the base, and a buffer sinking groove is arranged in the middle of the upper end face of the base corresponding to the outline of the rotor;

the center of the upper end face of the rotor is provided with a first accommodating groove, a first connecting column is detachably arranged in the first accommodating groove, and the upper end face of the first connecting column is attached to the lower end face of the first gasket; the lower end face of the rotor is provided with a plurality of second accommodating grooves in an annular array around the radial center of the rotor, second connecting columns are detachably arranged in the second accommodating grooves, and the lower end face of each second connecting column is attached to the upper end face of each second gasket.

In addition, the upper end of the first connecting column is 0.02-1 mm higher than the upper end face of the rotor, and the lower end of the second connecting column is 0.02-1 mm higher than the lower end face of the rotor.

As a possible implementation manner, the scheme further comprises a second shell and a connecting cover, wherein the second shell is of a cylindrical structure, the upper end of the second shell is fixedly connected with the base, the power unit is arranged in the second shell, and the connecting cover is detachably fixed at the lower end of the second shell;

the power unit is a motor, a driving shaft of the motor penetrates through the base and the second gasket and is fixedly connected with the rotor, the base is correspondingly provided with a penetrating hole for the driving shaft of the motor to penetrate through, and the penetrating hole is further provided with an oil seal matched with the driving shaft of the motor.

In addition, the drive shaft of motor passes through key or double-screw bolt and is connected with the rotor, the rotor center is equipped with the mounting hole of being connected with the drive shaft, when the motor passes through the key and is connected with the rotor, be equipped with the keyhole in the mounting hole of rotor, when the motor passes through the double-screw bolt and is connected with the rotor, its side still is equipped with the screw that runs through the rotor, the double-screw bolt screw thread passes the screw and with drive shaft threaded connection, with drive shaft and rotor fixed connection.

As a preferred implementation choice, preferably, in this scheme the motor is connected with first cable, lower part one side of second casing is equipped with the holding chamber, first cable is located the holding intracavity, and it has stranded first wire, and is put through with external power source through cable assembly.

As a preferred implementation option, preferably, the cable assembly according to the present embodiment includes:

one end of the second cable penetrates into the accommodating cavity and is provided with a plurality of strands of second wires corresponding to the first wires one by one, and the plurality of strands of second wires are detachably and correspondingly connected with the plurality of strands of first wires of the first cable one by one through the wiring assembly;

the first connecting sleeve is a rigid tubular structure with external thread structures at two ends, one end of the first connecting sleeve is in threaded connection with the lower part of the first shell and is communicated into the accommodating cavity, and the other end of the first connecting sleeve extends vertically upwards;

the second connecting sleeve is a flexible connecting pipe, one end of the second connecting sleeve is provided with an internal thread structure and is in threaded connection with the other end of the first connecting sleeve, and the other end of the second cable sequentially penetrates through the first connecting sleeve and the second connecting sleeve to be led out of the accommodating cavity and is used for being connected with an external power supply.

As a preferred implementation choice of the wiring assembly, preferably, the wiring assembly in this scheme includes a first connector and a second connector, wherein the other end of the first cable is connected with the first connector, a plurality of connection plates arranged at intervals are arranged on the first connector, a first conductive sheet is arranged on one side of the connection plates, and a plurality of first wires at the other end of the first cable are in one-to-one correspondence and are connected with the first conductive sheets; one end of the second cable is connected with the second connector, the second connector is provided with a connecting groove corresponding to the connecting plate on the first connector in a one-to-one mode, the second connector is detachably connected with the connecting plate of the first connector in a plugging mode through the connecting groove, one side of the connecting groove is provided with a second conducting strip corresponding to the first conducting strip in a one-to-one mode, and a plurality of second conducting wires at the other end of the second cable are corresponding to the second conducting strips in a one-to-one mode and are connected.

As another preferred implementation choice of the wiring assembly, preferably, the wiring assembly in this scheme includes a wiring frame, a plurality of fixing through slots corresponding to the first wires or the second wires one by one are arranged on the wiring frame, and fixing bolts corresponding to the fixing through slots one by one and penetrating into the fixing through slots from the outer threads of the wiring frame are also arranged on the wiring frame;

the first lead and the second lead which are correspondingly connected with each other penetrate into the fixed through groove from two sides of the fixed through groove respectively, and are pressed and fixed in the fixed through groove by the fixed bolt, so that the first lead and the second lead are fixedly butted;

in addition, the first wire and the second wire are in insulating contact with the fixed through groove.

As a preferred implementation choice, preferably, this scheme the lower part of second casing corresponds and is equipped with the connecting portion with first adapter sleeve complex, be equipped with on the connecting portion with first adapter sleeve one end complex connecting hole, the connecting hole upper end be equipped with first adapter sleeve one end threaded connection's internal thread structure, this connecting hole still communicates with the holding chamber, the other end of second cable passes connecting hole and first adapter sleeve in proper order, and wherein, the part that the second cable is located the connecting hole still overlaps and is equipped with explosion-proof circle.

As a preferred implementation option, preferably, the scheme further comprises a heat dissipation sleeve, wherein the heat dissipation sleeve is fixedly sleeved on the outer periphery of the first shell.

As a preferred implementation choice, preferably, in this scheme be equipped with the extension on the terminal surface that the connection seat kept away from first casing, this extension be equipped with a pair of with the air guide groove one-to-one and penetrate the grafting mouth in the air guide groove, a pair of attach fitting and a pair of grafting mouth one-to-one and one end peg graft and fix in the grafting mouth, still be equipped with the fire-retardant circle between grafting mouth bottom and the air guide groove.

As a preferred implementation option, preferably, the first pad and the second pad in this embodiment are wear-resistant pads.

Based on the above, the utility model also provides a fuel dispenser which comprises the oil gas recovery pump.

By adopting the technical scheme, compared with the prior art, the utility model has the beneficial effects that: the ingenious first spliced pole, second spliced pole of this scheme is through setting up between rotor and first gasket, second gasket, then corresponds on the rotor and set up first storage tank, the second storage tank that is used for holding first spliced pole, second spliced pole, and wherein, the upper end of first spliced pole exceeds rotor up end 0.02 ~ 1mm, the lower extreme of second spliced pole exceeds rotor lower terminal surface 0.02 ~ 1mm, can make the rotor when high-speed rotation through this structural style, can let first spliced pole, second spliced pole and gasket contact, avoid the rotor to directly contact with the gasket and make the rotor excessively fast wearing and tearing, and first spliced pole, second spliced pole adopt detachable form setting in the storage tank for both can maintain through replacing the spliced pole after wearing and tearing, and need not to change the rotor, this scheme structure implementation is reliable, maintenance cost is low and the rotor durability is good.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a schematic implementation of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of the present utility model, in which the second connecting sleeve is omitted;

FIG. 3 is a schematic view of the rotor and vane of the present utility model dividing the first housing into a first region and a second region;

FIG. 4 is a schematic cross-sectional view of an embodiment of the present utility model;

FIG. 5 is an exploded schematic view of a simplified embodiment of the present utility model, wherein the second connecting sleeve is hidden;

FIG. 6 is a schematic diagram of the partial structure of the scheme of the present utility model;

FIG. 7 is a schematic view of a schematic mating cut-away of a portion of the construction of the present utility model;

FIG. 8 is a schematic illustration of the connection of the rotor and motor by studs in accordance with the present utility model;

FIG. 9 is a schematic exploded view of a portion of the construction of the present utility model;

FIG. 10 is a schematic exploded view of a portion of the construction of the present utility model;

FIG. 11 is a schematic exploded view of a portion of the construction of the present utility model;

FIG. 12 is a schematic view of one simplified embodiment of a wiring assembly in accordance with aspects of the present utility model;

FIG. 13 is a schematic illustration of one of the simplified implementation of the wiring assembly of the present utility model mounted within a second housing;

FIG. 14 is a schematic view of the front and rear of one embodiment of the utility model in which the wiring assemblies are docked;

FIG. 15 is a schematic view of another simplified embodiment of a wiring assembly in accordance with aspects of the present utility model;

fig. 16 is a schematic view in section of one embodiment of the present utility model after the wire connection assembly is mated.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustrating the present utility model, but do not limit the scope of the present utility model. Likewise, the following examples are only some, but not all, of the examples of the present utility model, and all other examples, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the present utility model.

As shown in one of fig. 1 to 16, an oil and gas recovery pump of the present embodiment is connected in an oil and gas recovery line of an oil and gas dispenser and is used for providing a negative pressure required for oil and gas recovery, and includes:

the first shell 1 is of a cylindrical structure with two open ends;

a rotor 2 eccentrically arranged in the first housing 1, wherein a first Area (AOB) and a second Area (AOC) which are communicated with each other are formed on two sides of a maximum distance part between the rotor 2 and the inner wall of the first housing 1, and a plurality of radially extending slots 21 are formed on the periphery of the rotor 2;

the blades 3 are multiple and correspond to the slots 21 on the rotor 2 one by one and are arranged in the slots 21 in a sliding manner;

the base 6 is fixedly connected with the lower end face of the first shell 1 relatively;

the connecting seat 4 is fixedly connected with the upper end face of the first shell 1, and a pair of air guide grooves 42 which are oppositely arranged and communicated with the first area and the second area in a one-to-one correspondence manner are formed in the end face, close to the first shell 1, of the connecting seat 4;

the first gasket 24 is arranged between the connecting seat 4 and the upper end surface of the first shell 1 and separates a pair of air guide grooves 42, and the first gasket 24 is provided with avoiding through grooves corresponding to the structure of the pair of air guide grooves 42;

the connecting joints 5 are a pair and are in one-to-one correspondence and connected with the air guide grooves 42;

the power unit is arranged on one side of the base 6 far away from the first shell 1, the power output end of the power unit passes through the base 6 and the second gasket 25 and is fixedly connected with the rotor 2, and in combination with the scheme shown in fig. 3, the power unit drives the rotor 2 to rotate, so that the blades 3 which are slidably arranged on the slots 21 on the rotor 2 rotate, gas in the first area is pushed to the second area and is output by the gas guide grooves 42 and the connecting joints 5 corresponding to the second area, negative pressure is generated in the first area, or gas in the second area is pushed to the first area and is output by the gas guide grooves 42 and the connecting joints 5 corresponding to the first area, and negative pressure is generated in the second area;

the second gasket 25 is fixedly arranged between the lower end face of the first shell 1 and the upper end face of the base 6, and a buffer sinking groove 62 is further arranged in the middle of the upper end face of the base 6 corresponding to the outline of the rotor 2;

the center of the upper end face of the rotor 2 is provided with a first accommodating groove 22, a first connecting column 221 is detachably arranged in the first accommodating groove 22, the upper end of the first connecting column 221 is 0.02-1 mm higher than the upper end face of the rotor 2, and the upper end face of the first connecting column 221 is attached to the lower end face of the first gasket 24.

In addition, in this scheme, first gasket 24 and second gasket 25 are wear-resisting gasket, the lower terminal surface of rotor 2 is annular array around the radial center of rotor 2 and has laid a plurality of second holding grooves 23, all can dismantle in the second holding groove 23 and be provided with second spliced pole 231, the lower extreme of second spliced pole 231 exceeds rotor 2 lower terminal surface 0.02 ~ 1mm, just the lower terminal surface of second spliced pole 231 pastes with the up end of second gasket 25.

The scheme still includes second casing 7 and connecting cover 71, second casing 7 is tubular structure, its upper end and 6 fixed connection of base, the power unit sets up in second casing 7, connecting cover 71 can dismantle the fixed lower extreme at second casing 7.

The power unit is a motor 8, a driving shaft of the motor 8 passes through the base 6 and the second gasket 25 and is fixedly connected with the rotor 2, the base 6 is correspondingly provided with a penetrating hole for the driving shaft of the motor 8 to pass through, and the penetrating hole is also provided with an oil seal 84 matched with the driving shaft of the motor 8.

In addition, the driving shaft of the motor 8 is connected with the rotor 2 through a key 27 or a stud 212, a mounting hole connected with the driving shaft is formed in the center of the rotor 2, a key hole (for example, 3) is formed in the mounting hole of the rotor 2 when the motor 8 is connected with the rotor 2 through the key, a screw hole 211 penetrating through the rotor 2 is further formed in the side surface of the motor 8 when the motor 8 is connected with the rotor 2 through the stud 212, the stud 212 is threaded through the screw hole 211 and is in threaded connection with the driving shaft 83, the driving shaft 83 is fixedly connected with the rotor 2 (for example, fig. 8), and meanwhile, the rotor can be prevented from moving through the connection of the stud 212, namely, the rotor can be prevented from moving in a matching space between the first gasket 24 and the second gasket 25.

In this solution, the motor 8 is connected with a first cable 81, a receiving cavity 721 is provided at one side of the lower portion of the second housing 7, the first cable 81 is disposed in the receiving cavity 721, and has a plurality of first wires 82, and is connected to an external power source through a cable assembly; as a preferred implementation option, preferably, the cable assembly according to the present embodiment includes:

one end of the second cable 9 penetrates into the accommodating cavity 721 and is provided with a plurality of second wires 91 corresponding to the first wires 82 one by one, the plurality of second wires 91 are detachably connected with the plurality of first wires 82 of the first cable 81 one by one through a wiring assembly 94 at one end of the second cable 9, and the plurality of wires are arranged on the first cable 81 and the second cable 9;

the first connecting sleeve 92 is a rigid tubular structure with external screw thread structures at two ends, one end of the first connecting sleeve is in screw thread connection with the lower part of the first shell 1 and is communicated into the accommodating cavity 721, and the other end of the first connecting sleeve extends vertically upwards;

the second connecting sleeve 93 is a flexible connecting tube, one end of the second connecting sleeve has an internal thread structure and is in threaded connection with the other end of the first connecting sleeve 92, and the other end of the second cable 9 sequentially passes through the first connecting sleeve 92 and the second connecting sleeve 93 to be led out of the accommodating cavity 721 and is used for being connected with an external power supply.

As shown with emphasis on one of fig. 11 to 14, as a preferred implementation choice of the wiring assembly 94, preferably, the wiring assembly 94 includes a first connector 942 and a second connector 941, where the other end of the first cable 81 is connected to the first connector 942, a plurality of connection plates 9422 arranged at intervals are provided on the first connector 942, one side of the connection plate 9422 is provided with a first conductive sheet 9421, and multiple strands of first wires 82 on the other end of the first cable 81 are in one-to-one correspondence and connected to the first conductive sheet 9421; one end of the second cable 9 is connected with the second connector 941, the second connector 941 is provided with a connecting slot 9412 corresponding to the connecting plate 9422 on the first connector 942 one by one, the second connector 941 is detachably connected with the connecting plate 9422 of the first connector 942 in a plugging manner through the connecting slot 9412, one side of the connecting slot 9412 is provided with a second conductive sheet 9411 corresponding to the first conductive sheet 9421 one by one, and a plurality of strands of second wires 91 at the other end of the second cable 9 are corresponding to the second conductive sheets 9411 one by one and are connected.

In addition to the structure shown in fig. 11 to 14, as an alternative preferred implementation of the wiring assembly 94, as shown in fig. 15 or 16, preferably, the wiring assembly 94 includes a wiring frame, a plurality of fixing through slots 943 corresponding to the first wires 82 or the second wires 91 one by one are provided on the wiring frame, and fixing bolts 944 corresponding to the fixing through slots 943 one by one and penetrating into the fixing through slots 943 from the outer threads of the wiring frame are further provided on the wiring frame;

the first wire 82 and the second wire 91 which are correspondingly connected with each other respectively penetrate into the fixed through groove 943 from two sides of the fixed through groove 943, and are pressed and fixed in the fixed through groove 943 by the fixing bolt 944, so that the first wire 82 and the second wire 91 are fixedly butted;

in addition, the first wire 82 and the second wire 91 are in insulated contact with the fixing through groove 943.

In addition to the above, the lower portion of the second housing 7 is correspondingly provided with a connecting portion 72 matched with the first connecting sleeve 92, the accommodating cavity 721 is located in the connecting portion 72, a connecting hole matched with one end of the first connecting sleeve 92 is formed in the connecting portion 72, an internal thread structure in threaded connection with one end of the first connecting sleeve 92 is arranged at the upper end of the connecting hole, the connecting hole is further communicated with the accommodating cavity 721, the other end of the second cable 9 sequentially passes through the connecting hole and the first connecting sleeve 92, and an explosion-proof ring 921 is further sleeved on the portion, located in the connecting hole, of the second cable 9.

In order to improve the heat dissipation effect of the first housing 1, the present embodiment further includes a heat dissipation sleeve 26, where the heat dissipation sleeve 26 is fixedly sleeved on the outer periphery side of the first housing 1.

In terms of the structure of the connection base 4, as a preferred implementation choice, preferably, in this solution, an extension portion 41 is provided on an end surface of the connection base 4 far away from the first housing 1, the extension portion 41 is provided with a pair of plug ports corresponding to the air guide grooves 42 one by one and penetrating into the air guide grooves 42, a pair of connection connectors 5 corresponding to the plug ports one by one and having one ends plugged and fixed in the plug ports, a fire-retardant ring 43 is further provided between the bottom of the plug ports and the air guide grooves 42, a first O-shaped sealing ring 431 is sleeved on the fire-retardant ring, in this embodiment, the connection base 4 and the base 6 are in a cylindrical structure with one open ends, the disassembling ends of the connecting base 4 and the base 6 are sleeved on the outer periphery side of the first housing 1, and the upper end and the lower end of the outer periphery side of the first housing 1 are corresponding to the base 4 and the connection base 6 are provided with second O-shaped sealing rings 261 and 262.

According to the oil gas recovery pump adopting the scheme, when the oil gas recovery pump is applied, only one connector of the connector 5 is connected to the oil gas output pipe of the oiling machine, at the moment, the connector 5 is set to be an input connector (the inner area of the corresponding first shell 1 is the first area), the other connector is connected to the oil gas recovery pipe of the oiling machine, the pipe is connected to a device for storing oil gas, meanwhile, the connector is set to be an output connector (the inner area of the corresponding first shell 1 is the second area), and the rotor 2 is driven by the motor as a power unit when the oil gas recovery pump is combined with the device shown in fig. 3, so that the rotor 2 rotates clockwise in the fig. 3, gas in the first area is pushed to the second area and is output by the gas guide groove and the connector (namely the output connector) corresponding to the second area, negative pressure is generated in the first area, and then the gas recovery pipe of the oiling machine is sucked through the input connector, so that the oil gas in the oil gas recovery tank is recovered when the oiling gun is used for oiling.

The foregoing description is only a partial embodiment of the present utility model, and is not intended to limit the scope of the present utility model, and all equivalent devices or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.

Claims

1. An oil and gas recovery pump connected in an oil and gas recovery line of an oil and gas dispenser and for providing a negative pressure required for oil and gas recovery, comprising:

the first shell is of a cylindrical structure with two open ends;

it is characterized in that the method comprises the steps of,

a first accommodating groove is formed in the center of the upper end face of the rotor, a first connecting column is detachably arranged in the first accommodating groove, and the upper end face of the first connecting column is attached to the lower end face of the first gasket;

the lower end face of the rotor is provided with a plurality of second accommodating grooves in an annular array around the radial center of the rotor, second connecting columns are detachably arranged in the second accommodating grooves, and the lower end face of each second connecting column is attached to the upper end face of each second gasket.

2. The oil and gas recovery pump of claim 1, wherein the upper end of the first connecting column is 0.02-1 mm higher than the upper end face of the rotor, and the lower end of the second connecting column is 0.02-1 mm higher than the lower end face of the rotor.

3. The oil and gas recovery pump according to claim 1 or 2, further comprising a second housing and a connecting cover, wherein the second housing is of a cylindrical structure, the upper end of the second housing is fixedly connected with the base, the power unit is arranged in the second housing, and the connecting cover is detachably fixed at the lower end of the second housing;

the power unit is a motor, a driving shaft of the motor penetrates through the base and the second gasket and is fixedly connected with the rotor, the base is correspondingly provided with a penetrating hole for the driving shaft of the motor to penetrate through, and the penetrating hole is also provided with an oil seal matched with the driving shaft of the motor;

4. The oil and gas recovery pump of claim 3, wherein the motor is connected with a first cable, a containing cavity is arranged at one side of the lower part of the second shell, the first cable is arranged in the containing cavity, the first cable is provided with a plurality of strands of first wires, and the first cable is connected with an external power supply through a cable assembly.

5. The oil and gas recovery pump of claim 4 wherein said cable assembly comprises:

6. The oil and gas recovery pump of claim 5, wherein the wiring assembly comprises a first connector and a second connector, wherein the other end of the first cable is connected with the first connector, a plurality of connecting plates are arranged on the first connector at intervals, a first conducting plate is arranged on one side of the connecting plates, and a plurality of first wires at the other end of the first cable are in one-to-one correspondence and are connected with the first conducting plates; one end of the second cable is connected with the second connector, the second connector is provided with a connecting groove corresponding to the connecting plate on the first connector in a one-to-one mode, the second connector is detachably connected with the connecting plate of the first connector in a plugging mode through the connecting groove, one side of the connecting groove is provided with a second conducting strip corresponding to the first conducting strip in a one-to-one mode, and a plurality of second conducting wires at the other end of the second cable are corresponding to the second conducting strips in a one-to-one mode and are connected.

7. The oil and gas recovery pump of claim 5, wherein the wiring assembly comprises a wiring frame, a plurality of fixing through grooves corresponding to the first wires or the second wires one by one are arranged on the wiring frame, and fixing bolts corresponding to the fixing through grooves one by one and penetrating into the fixing through grooves from the outer side threads of the wiring frame are also arranged on the wiring frame;

8. The oil gas recovery pump according to any one of claims 5 to 6, wherein the lower part of the second housing is correspondingly provided with a connecting part matched with the first connecting sleeve, the connecting part is provided with a connecting hole matched with one end of the first connecting sleeve, the upper end of the connecting hole is provided with an internal thread structure in threaded connection with one end of the first connecting sleeve, the connecting hole is also communicated with the accommodating cavity, the other end of the second cable sequentially passes through the connecting hole and the first connecting sleeve, and the part of the second cable positioned in the connecting hole is also sleeved with an explosion-proof ring.

9. The oil and gas recovery pump of claim 1, further comprising a heat dissipation sleeve fixedly sleeved on the outer periphery of the first housing;

the end face, far away from the first shell, of the connecting seat is provided with an extension part, the extension part is provided with a pair of inserting ports which are in one-to-one correspondence with the air guide grooves and penetrate into the air guide grooves, a pair of connecting joints are in one-to-one correspondence with a pair of inserting ports, one ends of the connecting joints are inserted and fixed in the inserting ports, a fire-retarding ring is further arranged between the bottom of the inserting ports and the air guide grooves, and the fire-retarding ring is sleeved with a first O-shaped sealing ring;

the upper end and the lower end of the outer periphery of the first shell are provided with second O-shaped sealing rings corresponding to the base and the connecting seat;

the first gasket and the second gasket are wear-resistant gaskets.

10. A fuel dispenser comprising the oil and gas recovery pump of any one of claims 1 to 9.