CN220522799U

CN220522799U - Oil gas recovery pump and oiling machine

Info

Publication number: CN220522799U
Application number: CN202322123974.6U
Authority: CN
Inventors: 林喜彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-08-08
Filing date: 2023-08-08
Publication date: 2024-02-23
Anticipated expiration: 2033-08-08

Abstract

The utility model discloses an oil gas recovery pump and an oiling machine, the technical scheme is that a first connecting column and a second connecting column are arranged between a rotor and a first gasket and a second gasket, and then a containing groove for containing the connecting column and a waveform gasket are correspondingly arranged on the rotor, so that the first connecting column and the second connecting column can keep the first gasket and the second gasket corresponding to the first connecting column and the second gasket against each other, when the oil gas recovery pump and the oiling machine are damaged in long-term use, the first connecting column and the second connecting column can generate a certain pushing acting force through the characteristics of certain deformability of the first waveform gasket and the second waveform gasket, so that the first connecting column and the second connecting column can maintain the state of the first gasket and the second gasket corresponding to the first connecting column and the second connecting column against each other, and the first connecting column and the second connecting column can be contacted with the gasket when the rotor rotates at high speed through the structural form, so that the rotor is prevented from being directly contacted with the gaskets, the rotor is worn out too fast, the structural scheme is reliable, the maintenance cost is low, and the durability of the rotor is good.

Description

Oil gas recovery pump and oiling machine

Technical Field

The utility model relates to the field of negative pressure generating devices and automobile refueling equipment, in particular to an oil gas recovery pump and a refueling machine.

Background

The oil gas recovery of the oiling machine is used as an energy-saving and environment-friendly problem of the oiling equipment which is relatively hot at present, an oil gas recovery pipeline is arranged on an oil gun of the oiling machine, and the oil gas generated during oiling is sucked and recovered by combining a negative pressure device, so that the overflow of the oil gas during oiling of the oiling gun is avoided, on the one hand, the air cleanliness of a gas station can be effectively improved, on the other hand, the potential safety hazard of a large amount of oil gas can be eliminated, meanwhile, the loss of available energy sources is reduced, the oil gas recovery of the oiling machine mainly depends on the operation of the oil gas recovery pump to provide reliable negative pressure, and the oil gas recovery pump is mainly installed in a relatively compact space due to the structural design of the oiling machine, and the operation of the oil gas recovery pump is required to be connected with external power supply and control signals, so that the equipment is required to be maintained or replaced due to the abrasion of parts in the long-term working process, on the other hand, the traditional oil gas recovery pump is required to be in a complicated structure, the complicated matching work is required during the installation, the installation efficiency of the equipment is influenced, the installation efficiency of the traditional oil gas recovery pump is easily influenced, the negative pressure structure is easy to be attenuated, the abrasion of the rotor is also can be remarkably worn down, the existing scheme is also can be adjusted in the wear of the existing rotor is required to be worn or the rotor is worn down, and is worn down in the wear is well, the existing scheme is worn and can be worn down and worn down by the equipment is well is worn and worn down; therefore, how to optimize the part structure of the oil gas recovery pump, ensure the working reliability and stability and improve the mounting and dismounting efficiency is also a very practical topic.

Besides, after the oil gas recovery pump works for a long time, the oil gas recovery pump can stop working due to cable faults, at this time, the cable of the pump is required to be replaced, and the traditional cable connection of the pump is in a direct single-cable connection mode, when the cable is replaced, the cable is required to be deeply disassembled to mount wires on the cable in a strand-by-strand mode, under the condition, the working difficulty of replacing the cable is increased, time is consumed, equipment damage is easy to occur in the disassembling process, the process of returning the oiling machine to use is delayed, in addition, some pumps of the market pins at present can penetrate explosion-proof pipes on the cable, the connection mode of the explosion-proof pipes is single, and certain inconvenience exists in disassembling after the pump is installed, so that the efficiency of replacing the cable of the pump fault cable is improved, and the problem of ensuring the quick recovery of the pump is very practical.

Disclosure of Invention

In view of the above, the present utility model aims to provide an oil gas recovery pump and a fuel dispenser which are compact in structure, reliable in implementation, and capable of performing a certain degree of position adaptive adjustment on a wear member connected to a rotor when the wear member is worn, so as to improve the reliability of the wear member.

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 sliding grooves which extend in the radial direction are formed on the periphery of the rotor;

the rollers are a plurality of and correspond to the sliding grooves on the rotor one by one and are arranged in the sliding grooves in a sliding manner;

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 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 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 further formed in the middle of the upper end face of the base corresponding to the outline of the rotor;

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, so that a roller which is arranged on the rotor in a sliding way rotates along with the roller, the roller is attached to the inner wall of the first shell, gas in the first area is pushed to the second area and is output by a gas guide groove 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 groove corresponding to the first area, and negative pressure is generated in the second area;

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, first waveform gaskets which are in one-to-one correspondence with the first connecting columns are arranged in the first accommodating grooves, and the first waveform gaskets are arranged between the first connecting columns and the bottoms of the first accommodating grooves;

the second accommodating groove is internally provided with second waveform gaskets which are in one-to-one correspondence with the second connecting columns, and the second waveform gaskets are arranged between the second connecting columns and the bottom of the second accommodating groove.

As a possible implementation manner, the scheme further comprises a pair of connecting joints, wherein the connecting joints are in one-to-one correspondence with and are connected with the air guide grooves; the connecting seat is provided with an extension part on the end face far away from the first shell, the extension part is provided with a pair of plug ports which are in one-to-one correspondence with the air guide grooves and penetrate into the air guide grooves, the pair of connecting joints are in one-to-one correspondence with the pair of plug ports, one ends of the connecting joints are fixedly plugged in the plug ports, a fire-retarding ring is further arranged between the bottom of the plug ports and the air guide grooves, and the fire-retarding ring is sleeved with a first O-shaped sealing ring.

As a possible implementation manner, the first accommodating groove is arranged at the center of the upper end face of the rotor; the number of the rollers is 5, and the number of the sliding grooves on the rotor is 5 correspondingly.

As a possible implementation manner, in this embodiment, the upper end of the first connecting column is 0.01-0.05 mm higher than the upper end face of the rotor, and the lower end of the second connecting column is 0.01-0.05 mm higher than the lower end face of the rotor; the depth of the buffer sinking groove is 0.01-3 mm.

As a possible implementation manner, the scheme further comprises a heat dissipation sleeve fixedly sleeved on the outer periphery of the first shell; 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.

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

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 also 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, 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 provided 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 provided 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.

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: this scheme ingenious nature is through setting up first spliced pole, the second spliced pole between rotor and first gasket, the second gasket, then correspond on the rotor and set up the first storage tank that is used for holding first spliced pole, the second storage tank, and set up in first storage tank and second storage tank with first spliced pole, second spliced pole complex first wave form gasket, the second wave form gasket, make first spliced pole, the second spliced pole can keep rather than first gasket that corresponds, the second gasket offsets, and it takes place the loss when using for a long time, can have certain deformability's characteristics through first wave form gasket, the second wave form gasket, and produce certain pushing effort to first spliced pole, the second spliced pole, make it can maintain the state that offsets with its corresponding first gasket, the second gasket, can make the rotor when high-speed rotation through this structural style, can let first spliced pole, the second spliced pole and gasket contact, avoid the rotor direct to contact rather than the gasket, make the rotor contact with the first gasket, and wear and tear down the first spliced pole can be guaranteed to the second spliced pole, the wear and tear the first post is guaranteed to the second is realized, the second is realized and the wear and tear post is replaced, the second is replaced the structural style is realized, the wear and tear post is guaranteed, the connection is realized and the connection is low, the connection is realized and the connection is easy, the connection is realized and the change post is at the cost is replaced, and the pad is durable and the connection is used and the pad is replaced.

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 simplified implementation of the inventive arrangement;

FIG. 2 is an exploded schematic view of a simplified implementation of the present utility model;

FIG. 3 is a schematic illustration of a schematic embodiment of the present utility model in cross-section;

FIG. 4 is a schematic diagram of a second embodiment of the present utility model;

FIG. 5 is a third schematic illustration of a schematic embodiment of the present utility model;

FIG. 6 is a schematic diagram of a second embodiment of the present utility model, wherein some parts are hidden;

FIG. 7 is a schematic illustration of a schematic structural section of a schematic implementation of the solution of the present utility model;

fig. 8 is an exploded schematic view of one embodiment of the roller of the present utility model.

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.

Example 1

As shown in one of fig. 1 to 7, the present embodiment is an oil and gas recovery pump connected in an oil and gas recovery line of an oil and gas dispenser for providing a negative pressure required for oil and gas recovery, comprising:

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 212 (AOB) and a second area 213 (AOC) which are communicated with each other are formed at two sides of a maximum distance part between the rotor 2 and the inner wall of the first housing 1, and a plurality of sliding grooves 21 extending in radial direction are formed at the periphery of the rotor 2;

the rollers 211 are a plurality of and correspond to the sliding grooves 21 on the rotor 2 one by one and are arranged in the sliding grooves 21 in a sliding manner;

the base 3 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 surface of the first shell 1, and a pair of air guide grooves 41 which are oppositely arranged and are communicated with the first area 212 and the second area 213 in a one-to-one correspondence manner are arranged on the connecting seat 4;

a first gasket 42 disposed between the connection seat 4 and the upper end surface of the first housing 1 and separating the pair of air guide grooves 41, where the first gasket 42 is provided with a dodging through groove 421 corresponding to the structure of the pair of air guide grooves 41;

the second gasket 31 is fixedly arranged between the lower end face of the first shell 1 and the upper end face of the base 3, and a buffer sinking groove 32 is arranged in the middle of the upper end face of the base 3 corresponding to the outline of the rotor 2;

the power unit is arranged on one side of the base 3 far away from the first shell 1, the power output end of the power unit passes through the base 3 and the second gasket 31 and is fixedly connected with the rotor 2, the power unit drives the rotor 2 to rotate, so that the roller 211 which is arranged on the rotor 2 in a sliding way and penetrates through the sliding groove 21 rotates along with the inner wall of the first shell 1, the roller is attached to the inner wall of the first shell 1, the gas in the first area 212 is pushed to the second area 213 and is output by the gas guide groove 41 corresponding to the second area 213, the negative pressure is generated in the first area 212, or the gas in the second area 213 is pushed to the first area 212 and is output by the gas guide groove 41 corresponding to the first area 212, and the negative pressure is generated in the second area 213.

The upper end face of the rotor 2 is provided with a first accommodating groove 22, a first connecting column 23 is detachably arranged in the first accommodating groove 22, and the upper end face of the first connecting column 23 is attached to the lower end face of a first gasket 42;

the lower end face of the rotor 2 is provided with a plurality of second accommodating grooves 24 in an annular array around the radial center of the rotor 2, second connecting columns 25 are detachably arranged in the second accommodating grooves 24, and the lower end face of the second connecting columns 25 is attached to the upper end face of a second gasket 31.

In addition, first wave-shaped gaskets 231 corresponding to the first connecting columns 23 one by one are arranged in the first accommodating groove 22, and the first wave-shaped gaskets 231 are arranged between the first connecting columns 23 and the bottom of the first accommodating groove 22;

the second accommodating groove 24 is provided with second wave-shaped gaskets 251 corresponding to the second connecting columns 25 one by one, and the second wave-shaped gaskets 251 are arranged between the second connecting columns 25 and the bottom of the second accommodating groove 24.

In this solution, the primary function of the first wave washer 231 and the second wave washer 251 is that they can deform to a certain extent, and when initially installed, they are pressed by the first connecting post 23 and the second connecting post 25 to be compressed at the bottoms of the first accommodating groove 22 and the second accommodating groove 24, and when the rotor 2 works to wear the first connecting post 23 and the second connecting post 25, the first wave washer 231 and the second wave washer 251 gradually recover to the original wave state, and the first connecting post 23 and the second connecting post 25 are pushed to keep contact with the corresponding first washer 42 and second washer 31.

In order to facilitate installation and butt joint with an external negative pressure pipeline, the scheme also comprises a pair of connecting joints 43, wherein the connecting joints 43 are in one-to-one correspondence with and are connected with the air guide grooves 41; the end face, far away from the first shell 1, of the connecting seat 4 is provided with an extension portion 45, the extension portion 45 is provided with a pair of plug-in ports 431 which are in one-to-one correspondence with the air guide grooves 41 and penetrate into the air guide grooves 41, a pair of connecting joints 43 are in one-to-one correspondence with the pair of plug-in ports and one ends of the connecting joints are plugged and fixed in the plug-in ports 431, a fire-retarding ring 44 is further arranged between the bottom of the plug-in ports 431 and the air guide grooves 41, a first O-shaped sealing ring 441 is sleeved on the fire-retarding ring 44, and the other ends of the connecting joints 43 are used for being connected with an external negative pressure pipeline.

In this embodiment, the first accommodating groove 22 is disposed at the center of the upper end face of the rotor 2; the number of the rollers 211 is 5, and the number of the sliding grooves 21 on the rotor 2 is 5.

In order to avoid abrasion of the rotor 2 and avoid obvious influence on negative pressure generated by the operation of the rotor, as a possible implementation manner, further, the upper end of the first connecting column 23 is 0.01-0.05 mm higher than the upper end face of the rotor 2, and the lower end of the second connecting column 25 is 0.01-0.05 mm higher than the lower end face of the rotor 2; in this scheme, the main effect of the buffer sink 32 is that when the rotor 2 rotates and works and heats, it will be heated and expand to increase the rotation resistance, and the buffer sink 32 utilizes the deformation of the second gasket 31 to provide a certain fit space to float, the depth of the buffer sink 32 is 0.01-3 mm, in order to reduce the abrasion, preferably, the first gasket 42 and the second gasket 31 are wear-resistant gaskets.

In this scheme, the main effect of buffering heavy groove 32 lies in rotor 2 during long-time rotatory during operation, and it can be heated and take place expend with heat and contract with cold, under this circumstances, can improve the frictional force of spliced pole to the gasket, and set up the mode of buffering heavy groove 32, can avoid rotor 2 to take place excessive wear or the problem of jamming after the thermal expansion through forming certain inflation and dodging the space.

In order to improve the heat dissipation efficiency and the connection tightness, as a possible implementation manner, the scheme further comprises a heat dissipation sleeve 12, wherein the heat dissipation sleeve 12 is fixedly sleeved on the outer periphery side of the first shell 1; the upper end and the lower end of the outer periphery side of the first shell 1 are provided with second O-shaped sealing rings 11 corresponding to the base 3 and the connecting seat 4; in this solution, the base 3 and the connection seat 4 may be a cylindrical housing structure with an annular extension portion, that is, the cylindrical inner walls of the base 3 and the connection seat 4 are tightly matched with the second O-ring 11 on the outer peripheral side of the first housing 1, so as to improve the air tightness inside the first housing 1.

In addition, the scheme further comprises a second shell 52 and a connecting cover 53, wherein the second shell 52 is of a cylindrical structure, the upper end of the second shell 52 is fixedly connected with the base 3, the power unit is arranged in the second shell 52, and the connecting cover 53 is detachably fixed at the lower end of the second shell 52;

the power unit is a motor 5, a driving shaft 51 of the motor 5 passes through the base 3 and the second gasket 31 and is fixedly connected with the rotor 2, the base 3 is correspondingly provided with a penetrating hole for the driving shaft 51 of the motor 5 to pass through, and the penetrating hole is also provided with an oil seal 511 matched with the driving shaft of the motor 5;

in addition, the driving shaft 51 of the motor 5 is connected with the rotor 2 through a key or a stud 512, a mounting hole connected with the driving shaft 511 is formed in the center of the rotor 2, a key hole is formed in the mounting hole of the rotor 2 when the motor 5 is connected with the rotor 2 through the key, a screw hole penetrating through the rotor 2 is further formed in the side surface of the motor 5 when the motor 5 is connected with the rotor 2 through the stud 512, and the stud 512 is threaded through the screw hole and is in threaded connection with the driving shaft, so that the driving shaft is fixedly connected with the rotor 2.

In the line connection, as a preferred implementation option, preferably, the motor 5 is connected with a first cable 55, a receiving cavity 541 is disposed on one side of the lower portion of the second housing 52, the first cable 55 is disposed in the receiving cavity 541, and has a plurality of first wires 551, and is connected to an external power source through a cable assembly 6; preferably, the cable assembly 6 according to the present embodiment includes:

one end of the second cable 61 penetrates into the accommodating cavity 541 and is provided with a plurality of strands of second wires 611 corresponding to the first wires one by one, and one end of the second cable 61 is used for detachably connecting the plurality of strands of second wires 611 with the plurality of strands of first wires 551 of the first cable one by one through a wiring assembly;

the first connecting sleeve 63 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 541, and the other end of the first connecting sleeve extends vertically upwards;

the second connecting sleeve 64 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 63, and the other end of the second cable 61 is led out of the accommodating cavity 541 by sequentially penetrating through the first connecting sleeve 63 and the second connecting sleeve 64 and is used for being connected with an external power supply.

In order to improve the connection convenience of the first cable 55 and the second cable 61, as a preferred implementation choice, preferably, the wiring assembly in this scheme includes a wiring frame 62, a plurality of fixing through slots 621 corresponding to the first wires 551 or the second wires 611 one by one are provided on the wiring frame 62, and fixing bolts 622 corresponding to the fixing through slots 621 one by one and penetrating into the fixing through slots 621 by the outer threads of the wiring frame 62 are further provided on the wiring frame 62.

Wherein, the first wire and the second wire 611 which are mutually corresponding to each other are respectively penetrated into the fixed through groove 621 from two sides of the fixed through groove 621, and are pressed and fixed in the fixed through groove 621 by the fixed bolt, so that the first wire and the second wire 611 are fixedly butted;

in addition, the first and second wires 611 are in insulated contact with the fixing through groove 621.

As a preferred implementation choice, preferably, the lower part of the second casing 52 in this solution is correspondingly provided with a connection portion 54 that is matched with the first connection sleeve 63, a connection hole that is matched with one end of the first connection sleeve 63 is provided on the connection portion 54, an internal thread structure that is screwed with one end of the first connection sleeve 63 is provided on the upper end of the connection hole, the connection hole is further communicated with the accommodating cavity 541, and the other end of the second cable 61 sequentially passes through the connection hole and the first connection sleeve 63, where an explosion-proof ring is further sleeved on a portion of the second cable 61 located in the connection hole.

Based on the above, the oil gas recovery pump of this embodiment may be used in an oil dispenser to provide negative pressure power for oil gas recovery of the oil dispenser, when the oil gas recovery pump is applied, only one of the connectors 43 needs to be connected to the oil gas output pipe of the oil dispenser, at this time, the connector 43 is set as an input connector (the corresponding inner area of the first housing 1 is the first area 212), the other connector is connected to the oil gas recovery pipe of the oil dispenser, the pipe is connected to a device for storing oil gas, meanwhile, the connector is set as an output connector (the corresponding inner area of the first housing 1 is the second area 213), and in combination with fig. 5, when the device is in operation, the motor is used as a power unit to drive the rotor 2, so that the rotor 2 rotates anticlockwise in fig. 3, the gas in the first area 212 is pushed to the second area 213 and is output by the gas guide groove and the connector (i.e. the output connector) corresponding to the second area 213, so that negative pressure is generated in the first area 212, and then the oil gas recovery pipe of the oil dispenser is sucked by the input connector, so that when the oil is filled, the oil gas is recovered in the oil tank.

Example 2

On the basis of one of fig. 1 to 7, further referring to fig. 8, the present embodiment is substantially the same as embodiment 1, in which the structure of the roller 211 is different from embodiment 1, specifically, since the motor 5 drives the roller 211 to be attached to the inner wall of the first housing 1 by centrifugal force when in operation, and in order to improve the attaching reliability of the roller 211 to the inner wall of the first housing 1, the roller 211 includes:

the third casing 71 is a tubular structure with one end open, and the open end is provided with an internal thread structure;

the number of the magnetic columns 72 is one, the magnetic columns 72 axially oppositely penetrate into the third shell 71, and the end parts of the magnetic columns 72 are opposite in opposite magnetic poles; preferably, the magnetic posts 72 are sleeved with metal magnetic sleeves 74 at the ends far away from each other, and the metal magnetic sleeves 74 can be made of iron;

a connection cap 73 screwed to the open end of the third housing 7 encloses the magnetic column 72 within the third housing 71.

In this structural form, since the magnetic poles 72 in all the rollers 211 are opposite in the same position and have the same magnetic poles, a magnetic repulsive force is generated, so that the magnetic poles 72 are stressed in a direction away from the radial center, and the rollers 211 are kept in contact with the inner wall of the first housing 1 by combining the centrifugal force of the rotor 6, thereby improving the negative pressure generating effect.

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;

the method is characterized in that:

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

3. The oil and gas recovery pump of claim 1, wherein the first accommodation groove is arranged at the center of the upper end face of the rotor; the number of the rollers is 5, and the number of the sliding grooves on the rotor is correspondingly 5;

the upper end of the first connecting column is 0.01-0.05 mm higher than the upper end face of the rotor, and the lower end of the second connecting column is 0.01-0.05 mm higher than the lower end face of the rotor; the depth of the buffer sinking groove is 0.01-3 mm.

4. 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 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.

5. The oil and gas recovery pump of claim 1, 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;

6. The oil and gas recovery pump of claim 5, wherein the motor is connected with a first cable, a receiving cavity is arranged at one side of the lower part of the second shell, the first cable is arranged in the receiving 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.

7. The oil and gas recovery pump of claim 6, wherein the cable assembly comprises:

8. The oil and gas recovery pump of claim 7, 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;

9. The oil and gas recovery pump of claim 8, 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.

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