CN115417368A

CN115417368A - Oil gas recovery pump cable connection structure and oil gas recovery pump and tanker aircraft

Info

Publication number: CN115417368A
Application number: CN202211002840.2A
Authority: CN
Inventors: 林喜彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-12-02

Abstract

The invention discloses a cable connecting structure of an oil gas recovery pump, the oil gas recovery pump and an oiling machine, and the scheme of the invention ingeniously sets a connecting cable of a driving motor into a first cable and a second cable which are independently and detachably mounted, so that when a second cable connected with a commercial power or other external power supply and a control device breaks down, the connection between the first cable and the second cable can be conveniently released, the motor does not need to be deeply disassembled, the cable connecting structure can greatly facilitate the replacement of a cable external connection cable of the driving motor, and the fault maintenance efficiency of the external connection cable (the second cable) is improved; in addition, structurally at the roller of oil gas recovery pump, this scheme ingeniously has introduced and has encapsulated in magnetic column assembly and the third casing for form radial repulsion force between the roller, improve roller and second casing inner wall's laminating reliability, make the use of the device of this scheme more reliable, the durability is stronger, and the working property continuation is good, and life obtains guaranteeing.

Description

Oil gas recovery pump cable connection structure and oil gas recovery pump and tanker aircraft

Technical Field

The invention relates to the technical field of cable connecting structures, pump machine structures and oil gas recovery pumps, in particular to an oil gas recovery pump cable connecting structure, an oil gas recovery pump and an oiling machine.

Background

The oil gas recovery of the oiling machine is used as an energy-saving and environment-friendly subject of the oiling equipment which is hot in time, an oil gas recovery pipeline is arranged on an oil gun of the oiling machine, oil gas generated in oiling is sucked and recovered by combining a negative pressure device, so that the oil gas overflowing of the oiling gun is avoided, the air cleanliness of a gas station can be effectively improved, the potential safety hazard of large oil gas loss can be eliminated, and the loss of available energy is reduced.

Besides, most of oil gas recovery pumps sold in the market at present have complex transmission structures, after the oil gas recovery pumps work for a long time, the equipment is often required to be maintained or replaced due to abrasion of parts, the traditional oil gas recovery pumps are complex in structure, and need complex matching work during installation, so that the installation efficiency of the equipment is influenced to a certain extent, the transmission structures of the traditional oil gas recovery pumps are easy to cause obvious negative pressure performance attenuation due to abrasion, therefore, the part structures of the oil gas recovery pumps are optimized, the working reliability and the stability are guaranteed, and the installation and disassembly efficiency is improved.

Disclosure of Invention

In view of this, the present invention aims to provide a cable connection structure for an oil vapor recovery pump, an oil vapor recovery pump and a refueling machine, which is convenient to assemble and disassemble, simple in structure, low in cost and reliable in implementation.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

the utility model provides an oil gas recovery pump cable connection structure is connected and is used for the switch on with the driving motor of oil gas recovery pump, driving motor installs in first casing, the lower part of first casing is equipped with holding chamber and its bottom and is open structure, the bottom releasable connection of first casing has the bottom, the driving motor electricity is connected with first cable, and the holding intracavity is located to this first cable, and it has the first wire of stranded (a stranded promptly), oil gas recovery pump cable connection structure includes:

one end of the second cable is connected with the multi-strand first wires of the first cable in a detachable one-to-one correspondence manner through a wiring component;

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 with the accommodating cavity, and the other end of the first connecting sleeve vertically extends 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 lead out the accommodating cavity and is used for being connected with an external power supply.

As a possible implementation manner, further, the wire connection assembly in this scheme includes a first connector and a second connector, where the other end of the first cable is connected to the first connector, the first connector is provided with a plurality of connection plates arranged at intervals, one side of the connection plate is provided with a first conductive sheet, and a plurality of first wires at the other end of the first cable are in one-to-one correspondence with and connected to the first conductive sheet; one end of the second cable is connected with the second connector, a connecting groove in one-to-one correspondence with the connecting plate on the first connector is arranged on the second connector, the second connector is detachably connected with the connecting plate of the first connector in an inserting mode through the connecting groove, a second conducting strip in one-to-one correspondence with the first conducting strip is arranged on one side of the connecting groove, and multiple strands of second wires at the other end of the second cable are in one-to-one correspondence with the second conducting strip and connected with the second conducting strip.

As a preferred implementation option, preferably, in this scheme the lower part of the first casing is correspondingly provided with a connecting portion matched with the first connecting sleeve, the connecting portion 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 further communicated with the accommodating cavity, the other end of the second cable penetrates through the connecting hole and the first connecting sleeve according to a sequence, and an explosion-proof ring is further sleeved on a portion of the second cable located in the connecting hole.

Based on the cable connection structure, the invention also provides an oil gas recovery pump which is connected in an oil gas recovery pipeline of the oiling machine and used for providing negative pressure required by oil gas recovery, and the oil gas recovery pump comprises the cable connection structure of the oil gas recovery pump.

As a preferred implementation choice, the present solution preferably further includes:

the base is arranged on the upper end face of the first shell and is relatively and fixedly connected with the first shell;

the second shell is of a cylindrical structure with open upper and lower ends, and the lower end face of the second shell is fixed on the upper end face of the base;

the rotor is eccentrically arranged in the second shell, the lower end face of the rotor is attached to the upper end face of the base or a gap with the distance smaller than a preset value is formed, a first area and a second area which are communicated with each other are formed on two sides of the position with the maximum distance between the rotor and the inner wall of the second shell, and a plurality of arc-shaped movable grooves extending in the radial direction are formed in the peripheral side of the rotor;

the rollers are in a cylindrical structure, the number of the rollers is multiple, the rollers correspond to the arc-shaped movable grooves on the rotor one by one and are movably arranged in the arc-shaped movable grooves;

the connecting seat is fixedly connected with the upper end face of the second shell, 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 mode are formed in the end face, close to the second shell, of the connecting seat, and the upper end face of the rotor is attached to the lower end face of the connecting seat or a gap with the distance smaller than a preset value is formed between the upper end face of the rotor and the lower end face of the connecting seat;

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

the driving shaft of the driving motor can rotatably penetrate through the first shell and the base and is fixedly connected with the rotor, the driving motor drives the rotor to rotate, the roller in the arc-shaped movable groove on the rotor rotates along with the rotor and is attached to the inner side wall of the second shell under the action of centrifugal force, gas in the first area is pushed to the second area and is output by the gas guide groove and the connecting joint corresponding to the second area, negative pressure is generated in the first area, or the gas in the second area is pushed to the first area and is output by the gas guide groove and the connecting joint corresponding to the first area, and negative pressure is generated in the second area.

As a preferred implementation choice, preferably, the present solution further includes a first gasket, the first gasket is fixedly disposed between the lower end face of the second casing and the upper end face of the base, the middle portion of the upper end face of the base is further provided with a buffer sinking groove corresponding to the profile of the rotor, and the depth of the buffer sinking groove is 0.02-3 mm.

As a preferred implementation choice, the roller of the present scheme preferably comprises:

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

the magnetic columns are in a pair in number and are axially and oppositely arranged in the third shell in a penetrating way, and the ends of the magnetic columns are opposite in opposite magnetic poles;

and the connecting cover is in threaded connection with the opened end of the third shell and encapsulates the magnetic column in the third shell.

As a preferred implementation choice, preferably, the end portions of the magnetic columns, which are far away from each other, are sleeved with metal flux sleeves, and the metal flux sleeves may be formed by iron materials.

As a better implementation choice, preferably, the scheme further includes a heat dissipation sleeve, the heat dissipation sleeve is fixedly sleeved on the outer peripheral side of the second housing, the lower part of the outer peripheral side of the second housing is provided with a lap joint part of an annular structure, the lower end of the heat dissipation sleeve abuts against the lap joint part, and the lower end of the heat dissipation sleeve does not exceed the lower end face of the first housing;

the edge of the upper end face of the connecting seat penetrates through the connecting seat through a plurality of first bolt threads and is locked with the threads at the upper end of the heat dissipation sleeve;

the edge of the lower end face of the base penetrates through the base through a plurality of second bolt threads and is locked with the threads at the lower end of the heat dissipation sleeve, and the first shell is indirectly clamped and fixed between the connecting seat and the base.

As a better implementation choice, preferably, this scheme the connecting seat is equipped with the extension on keeping away from the terminal surface of second casing, and this extension is equipped with a pair of interface that penetrates in the air guide groove with the air guide groove one-to-one, and a pair of attach fitting and a pair of interface one-to-one and one end are pegged graft and are fixed in the interface, still be equipped with the fire stopping collar between interface bottom and the air guide groove.

As a better implementation choice, preferably, in this scheme, the upper end face and the lower end face of the second casing are both provided with a first O-shaped sealing ring, and the end part of the connection joint inserted and fixed in the insertion port is provided with a second O-shaped sealing ring.

As a better implementation option, preferably, in the present scheme, the base is correspondingly provided with a penetrating hole through which a driving shaft of the driving motor passes, the penetrating hole is further provided with an oil seal matched with the driving shaft of the dc brushless driving motor, the penetrating hole is further provided with a bearing matched with the driving shaft, an outer ring of the bearing is fixedly connected with the penetrating hole, and a jump stopping snap spring is further arranged below the driving shaft corresponding to the bearing.

Based on the oil gas recovery pump structure, the invention also provides an oiling machine which comprises the oil gas recovery pump.

By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that: according to the scheme, the connecting cable of the driving motor is set into the first cable and the second cable which are independently and detachably installed, and the first cable and the second cable are detachably installed through the wiring component, so that when the second cable connected with a mains supply or other external power supply and a control device fails, the connection between the first cable and the second cable can be conveniently removed after the bottom cover of the first shell is detached, and the first cable connected with the driving motor is not needed to be deeply detached to share a wire on the installed cable; in addition, this scheme still cooperates with the upper and lower ends of second casing through base and connecting seat, make the inside cavity that forms relative seal of second casing, correspond on the connecting seat again and set up the air guide groove, the extension on the cooperation connecting seat connects the attach fitting that is used for oil gas input and output, again ingenious sets up rotor eccentric in the second casing, and set up the arc movable slot on the rotor and set up the roller movably, when making it rotate as the power pack by driving the rotor by driving motor, the roller can promote the air in the second casing to shift and make the second casing form the negative pressure simultaneously, make the attach fitting as the input attract oil gas to get into in the second casing, and from the attach fitting one-way output as the output, on the roller structure, this scheme has introduced magnetic column assembly and has encapsulated in the third casing, make form the radial repulsion force between the roller, improve the laminating reliability of roller and second casing inner wall, this scheme still considers the rotor during operation's heat production problem, through set up first gasket at second casing lower extreme in order to improve the durability of rotor, simultaneously, still correspond the buffer sink the heavy groove setting up of buffer, make the setting up the first gasket when rotor's working space and make it effectively take place the deformation to the heat-generating, make the rotor's life-increasing of the buffer performance, make the rotor more durable emergence of the buffer that the rotor effectively take place, the buffer that the buffer can be influenced, the efficiency of the buffer can be more.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an exploded view of a schematic implementation of an embodiment of the present invention;

FIG. 3 is a schematic bottom view of an embodiment of the present invention, wherein the bottom cover of the first housing is hidden;

FIG. 4 is an enlarged view of a portion of the structure at A in FIG. 3;

FIG. 5 is a schematic view of a schematic cut-away view of an embodiment of the present invention;

FIG. 6 is a schematic view of a first cable and a second cable of a drive motor according to an embodiment of the present invention before they are installed by a wiring assembly;

FIG. 7 is a schematic diagram illustrating the wiring fitting principle of the wiring assembly proposed in the embodiment of the present invention;

FIG. 8 is a schematic view of a prior art wiring assembly;

FIG. 9 is a schematic illustration of the prior art wiring assembly of FIG. 8 in use in the inventive arrangement;

FIG. 10 is a schematic top view of an embodiment of the present invention;

FIG. 11 isbase:Sub>A sectional view taken at A-A in FIG. 10;

FIG. 12 is an enlarged view of a portion of the structure at B in FIG. 11;

FIG. 13 is an exploded view of a portion of a schematic implementation of an embodiment of the present invention;

FIG. 14 is a schematic exploded view of a portion of the structure of an embodiment of the present invention;

FIG. 15 is a schematic two-dimensional view of the rotor, rollers and second housing in a simplified fit according to an embodiment of the invention, with portions of the components hidden and not shown;

FIG. 16 is a schematic three-dimensional view of the rotor, rollers and second housing in accordance with an embodiment of the present invention, with portions of the components hidden and not shown;

FIG. 17 is a schematic exploded view of the structure shown in FIG. 16, with portions of the components hidden and not shown;

fig. 18 is an exploded view of one of the schematic implementations of the roller according to the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only illustrative of the present invention, and do not limit the scope of the present invention. Similarly, the following examples are only some but not all examples of the present invention, and all other examples obtained by those skilled in the art without any inventive work are within the scope of the present invention.

As shown in one of fig. 1 to 7, an oil vapor recovery pump cable connection structure according to an embodiment of the present invention is connected to a driving motor 1 (which may be a dc brushless motor) of an oil vapor recovery pump and used for connecting a power supply, the driving motor 1 is installed in a first housing 2, a receiving cavity 22 is formed in a lower portion of the first housing 2, a bottom of the first housing 2 is an open structure, a bottom cover 21 is detachably connected to a bottom of the first housing 2, the driving motor 1 is electrically connected to a first cable 11, the first cable 11 is installed in the receiving cavity 22 and has a plurality of first wires 1101, and the oil vapor recovery pump cable connection structure includes:

a second cable 3, one end of which penetrates into the accommodating cavity 22 and is provided with a plurality of strands of second conducting wires 301 corresponding to the first conducting wires 1101 one by one, wherein one end of the second cable 3 connects the plurality of strands of second conducting wires 301 with the plurality of strands of first conducting wires 1101 of the first cable in a detachable one-to-one correspondence manner through a wiring assembly 33;

the first connecting sleeve 31 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 2 and communicated into the accommodating cavity 22, and the other end of the first connecting sleeve extends vertically upwards;

the second connecting sleeve 32 is a flexible connecting pipe (which may be an explosion-proof pipe), 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 31, and the other end of the second cable 3 sequentially passes through the first connecting sleeve 31 and the second connecting sleeve 32 to be led out of the accommodating cavity 22 and is used for being connected with an external power supply or a control device.

In order to conveniently disassemble and assemble the first cable 11 and the second cable 3, the wiring assembly 33 of the present disclosure includes a first connector 331 and a second connector 332, wherein the other end of the first cable 11 is connected to the first connector 331, a plurality of connection plates 3311 arranged at intervals are disposed on the first connector 331, a first conductive plate 3312 is disposed on one side of the connection plate 3311, and a plurality of first wires 1101 at the other end of the first cable 11 are in one-to-one correspondence with and connected to the first conductive plates 3312; one end of the second cable 3 is connected to the second connector 332, a connection groove 3321 corresponding to the connection plate 3311 of the first connector 331 one to one is formed in the second connector 332, the second connector 332 is detachably connected to the connection plate 3311 of the first connector 331 through the connection groove 3321 in an inserting manner, a second conductive sheet 3322 corresponding to the first conductive sheet 3312 one to one is formed on one side of the connection groove 3321, and the plurality of second wires 301 at the other end of the second cable 3 are corresponding to and connected to the second conductive sheet 3322 one to one.

After the second cable 3 and the first cable 11 are installed in a butt joint manner, in a using process, there may be abnormal problems such as peeling and breaking of a portion where the second cable 3 penetrates into the accommodating cavity 22 and loosening of a connection relationship between the first cable 11 and the second cable 3 due to the fact that the second cable 3 is dragged, and as a better implementation choice, preferably, in the present embodiment, the lower portion of the first housing 2 is correspondingly provided with a connecting portion 221 matched with the first connecting sleeve 31, the connecting portion 221 is provided with a connecting hole 23 matched with one end of the first connecting sleeve 31, the upper end of the connecting hole 23 is provided with an internal thread structure in threaded connection with one end of the first connecting sleeve 31, the connecting hole 23 is further communicated with the accommodating cavity 22, the other end of the second cable 3 sequentially penetrates through the connecting hole 23 and the first connecting sleeve 31, and an explosion-proof ring 34 is further sleeved on a portion of the second cable 3 located in the connecting hole 23.

Under this structure, owing to have the traction of first adapter sleeve 31 and second adapter sleeve 32, can make the part that second cable 3 is close first cable 11 be in comparatively stable guard state, and simultaneously, the vertical drawing of second cable 3 has also made things convenient for driving motor 1 to install when the tanker aircraft lower part, can avoid the part that second cable 3 is close first cable 11 to appear subaerial scraping scheduling problem.

In addition to the above-mentioned wiring assembly structure, in combination with fig. 8 or fig. 9, the solution of this embodiment can also directly use a small-volume wire quick-connection assembly sold in the market to connect the first cable and the second cable, which is not limited to the foregoing structure.

Through the structure, when the second cable 3 breaks down and needs to be replaced, a maintainer only needs to disassemble the bottom cover 21, then directly removes the connection relationship between the first joint 331 and the second joint 332, so that the second cable 3 with the fault is removed, then sequentially detaches the first connecting sleeve 31 and the second connecting sleeve 32, so that the second cable 3 with the fault is taken out and detached and removed, then installs the newly replaced second cable 33 which is connected with the second connector 332 in advance, sequentially leads out the other end of the second cable 33 from the connecting hole 23, then installs the explosion-proof ring 34 on the second cable 3, sequentially penetrates the other end of the second cable 3 through the first connecting sleeve 31 and the second connecting sleeve 32 which are connected in advance, and finally, threadedly connects one end of the first connecting sleeve 31 with the connecting hole 23, so that the first cable 3 is installed in place, and the explosion-proof ring 34 is installed in place.

On the basis of the structure shown in one of fig. 1 to fig. 9, further with reference to one of fig. 11 to fig. 18, based on the cable connection structure, the present embodiment further provides an oil and gas recovery pump connected in an oil and gas recovery pipeline of the fuel dispenser and used for providing negative pressure required for oil and gas recovery, and on the basis of the structure, the present embodiment further includes:

the base 4 is arranged on the upper end face of the first shell 2 and is relatively and fixedly connected with the first shell;

the second shell 5 is a cylindrical structure with open upper and lower ends, and the lower end face of the second shell is fixed on the upper end face of the base 4;

the rotor 6 is eccentrically arranged in the second shell 5, the lower end face of the rotor is attached to the upper end face of the base 4 or a gap with a distance smaller than a preset value is formed, a first area 52 and a second area 53 which are communicated with each other are formed on two sides of the maximum distance position of the inner wall of the rotor 6 and the inner wall of the second shell 5, and a plurality of arc-shaped movable grooves 61 which extend in the radial direction are arranged on the peripheral side of the rotor 6, wherein the rotor can be made of stainless steel or other hard metals;

the rollers 7 are cylindrical structures, the number of the rollers is multiple, the rollers correspond to the arc-shaped movable grooves 61 on the rotor 6 one by one and are movably arranged in the arc-shaped movable grooves 61, the parts, close to the radial center of the rotor 6, of the arc-shaped movable grooves 61 are semicircular structures matched with the outer diameter of the rollers 7, and the distance between the side walls of the parts, far away from the radial center of the rotor 6, of the arc-shaped movable grooves 61 is 1.005-1.1 times of the diameter of the rollers 7.

The connecting seat 8 is fixedly connected with the upper end face of the second shell 5, a pair of air guide grooves 84 which are oppositely arranged and correspondingly communicated with the first area 52 and the second area 53 one by one are arranged on the end face, close to the second shell 5, of the connecting seat 8, and the upper end face of the rotor 6 is attached to the lower end face of the connecting seat 8 or a gap with the distance smaller than a preset value is formed between the upper end face of the rotor 6 and the lower end face of the connecting seat 8;

the connecting joints 9 are a pair and are connected with the air guide grooves 84 in a one-to-one correspondence manner;

wherein, the driving shaft 12 of the driving motor 1 rotatably passes through the first housing 2 and the base 4 and is fixedly connected with the rotor 6 (which may be connected by a key or locked by a latch), the dc brushless driving motor 1 drives the rotor 6 to rotate, so that the rollers 7 in the arc-shaped movable groove 61 on the rotor 6 have the same magnetic repulsion effect and rotate with the same magnetic repulsion effect, and tightly adhere to the inner side wall of the second housing 5 under the centrifugal force effect, so that the gas in the first region 52 is pushed to the second region 53 and is output by the gas guide groove 84 and the connection joint 9 corresponding to the second region 53, and the negative pressure is generated in the first region 52 or the gas in the second region 53 is pushed to the first region 52 and is output by the gas guide groove 84 and the connection joint 9 corresponding to the first region 52, so that the negative pressure is generated in the second region 53; taking fig. 16 as an example, if the driving motor 1 drives the rotor 6 to rotate clockwise, the gas in the second area 53 is pushed to the first area 52, because the volume of the space formed between the rollers 7 is reduced when the balls 7 move along the rotor 6 in the first area 52, the gas therein is pressed into the gas guide grooves 84 and the connection joints 9 corresponding to the first area 52 for output, at this time, the connection joints 9 corresponding to the first area 52 can be set as output joints, and the gas in the second area 53 is pushed to the first area 52, at this time, the second area 53 forms a negative pressure, so as to pull the gas guide grooves 84 and the connection joints 9 corresponding to the second area 53 to attract the oil-gas negative pressure to the second area 53, at this time, the connection joints 9 corresponding to the second area 53 can be set as input joints.

The scheme also comprises a first gasket 54, the first gasket 54 is fixedly arranged between the lower end face of the second shell 5 and the upper end face of the base 4, when the rotor 6 is driven to rotate by the driving motor 1, gas in the second shell 5 can be compressed, and meanwhile, a certain friction force can be generated when the rotor 6 works to drive the roller 7 to be in contact with the inner wall of the second shell 5, so that when the device works, a large amount of heat can be generated in the second shell 5, because the device is assembled to a certain extent, relatively precise assembly is formed, and the rotor 6 expands after being heated, at this moment, if the device works continuously, the contact friction force between the rotor 6 and the first gasket 54 can be increased, so that the working resistance is increased, and meanwhile, the matching abrasion can be intensified, in the scheme, the middle of the upper end face of the base 4 is further provided with a buffer sinking groove 41 corresponding to the outline of the rotor 6, as an example of a size, the depth of the buffer sinking groove 51 is 0.02-3 mm, but the scheme is not limited to the size, and through the arrangement of the buffer sinking groove 41, when the rotor 6 is heated, the acting force generated by the expansion of the rotor 6 can push the first gasket 54 to deform, so that the first gasket is deformed along the direction of the buffer sinking groove 41, the matching space of the rotor 6 is increased, and excessive friction interference on the first gasket 54 when the rotor 6 is heated is avoided; first gasket 54 adopts the wear-resisting gasket of elasticity, in addition, also can improve the cooperation reliability of rotor 6 up end and connecting seat 8 up end through setting up the second gasket that is similar to first gasket 54 between the up end of connecting seat 8 and rotor 6, and the second gasket structurally need be equipped with the mouth of dodging that adapts to with air guide groove 84.

Because the driving motor 1 drives the roller 7 to be attached to the inner wall of the second housing 5 by centrifugal force when in operation, in order to improve the reliability of the attachment of the roller 7 to the inner wall of the second housing 5, the roller 7 comprises:

a third housing 71 having a tubular structure with an open end, wherein the open end is provided with an internal thread structure;

the magnetic columns 72 are in a pair in number and axially oppositely penetrate through the third shell 71, and the opposite poles of the ends of the magnetic columns 72 are opposite; preferably, the end portions of the magnetic pillars 72 far away from each other are sleeved with a metal flux sleeve 74, and the metal flux sleeve 74 may be formed by an iron material;

and a connection cap 73 screwed to the open end of the third housing 7 to enclose the magnetic cylinder 72 in the third housing 71.

In this structure, since the magnetic columns 72 in all the rollers 7 are opposite in like magnetic poles at the same position, they generate a magnetic repulsive force, so that the magnetic columns 72 are forced in a direction away from the radial center, and the rollers 7 are kept in contact with the inner wall of the second housing 5 by the centrifugal force of the rotor 6, thereby improving the negative pressure productivity.

In order to avoid damage to parts caused by overheating during operation, the heat dissipation sleeve 51 is further included, the heat dissipation sleeve 51 is fixedly sleeved on the outer peripheral side of the second shell 5, the lower portion of the outer peripheral side of the second shell 5 is provided with an overlapping portion 56 of an annular structure, the lower end of the heat dissipation sleeve 51 abuts against the overlapping portion 56, and the lower end of the heat dissipation sleeve does not exceed the lower end face of the first shell 2.

In the structural installation, the edge of the upper end surface of the connecting seat 8 penetrates through the connecting seat 8 through a plurality of first bolts 83 and is locked with the upper end thread of the heat dissipation sleeve 51; the edge of the lower end face of the base 4 passes through the base 4 through the threads of a plurality of second bolts 42 and is locked with the threads of the lower end of the heat dissipation sleeve 51, so that the first shell 2 is indirectly clamped and fixed between the connecting seat 8 and the base 4.

In order to improve the safety and the sealing performance of the air inlet and the air outlet, as a better implementation choice, preferably, an extension part 82 is arranged on the end surface of the connecting seat 8 far away from the second shell 5, the extension part 82 is provided with a pair of insertion ports 81 which correspond to the air guide grooves 84 one by one and penetrate into the air guide grooves 84, a pair of connecting joints 9 corresponds to the pair of insertion ports 81 one by one, one ends of the connecting joints are inserted and fixed in the insertion ports, and a fire stopping ring 92 is further arranged between the bottom of the insertion ports and the air guide grooves 84; in addition, in the scheme, the upper end face and the lower end face of the second shell 5 are both provided with first O-shaped sealing rings 55, and the end part of the connecting joint 9 which is fixedly inserted in the insertion port is provided with a second O-shaped sealing ring 91; in addition, in order to improve the installation reliability of the connection joint 9, the connection joint 9 may be fixedly installed in the insertion opening 81 by an auxiliary installation plate 93 in cooperation with the locking bolt 85.

In the connection transition of the driving motor 1 and the rotor 6, the base 4 is correspondingly provided with a penetrating hole 43 through which the driving shaft 12 of the driving motor 1 penetrates, the penetrating hole 43 is further provided with an oil seal 13 matched with the driving shaft 12 of the driving motor 1, the penetrating hole 43 is further provided with a bearing 14 matched with the driving shaft 12, the outer ring of the bearing 14 is fixedly connected with the penetrating hole 43, and a fleeing-preventing snap spring 141 is further arranged below the driving shaft 12 corresponding to the bearing 14.

When the oil-gas recovery pump adopting the scheme is applied, only one connector of the connecting connector 9 needs to be connected into an oil-gas output pipe of the oiling machine, at this time, the connecting connector 9 is set as an input connector (if the driving motor rotates clockwise as shown in fig. 16, the corresponding inner area of the second shell 5 is the second area 53), the other connecting connector 9 is connected to an oil-gas recovery pipe of the oiling machine, the pipe is connected to a device for storing oil gas, meanwhile, the connecting connector 9 is set as an output connector (the corresponding inner area of the second shell 5 is the first area 52), when the device of the scheme works, the driving motor 1 is used as a power unit to drive the rotor 6, the rotor 6 rotates along the clockwise direction in fig. 16, the gas in the second area 53 is pushed to the first area 52 and is output by the gas guide groove 84 corresponding to the first area 52 and the connecting connector 9 (namely the output connector), so that negative pressure is generated in the second area 53, and then the gas suction is performed on the oil-gas recovery pipe in the oiling gun through the input connector, so that oil gas in the oiling machine is recovered.

The above description is only a part of the embodiments of the present invention, and not intended to limit the scope of the present invention, and all equivalent devices or equivalent processes performed by the present invention through the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides an oil gas recovery pump cable connection structure is connected and is used for the switch on with the driving motor of oil gas recovery pump, driving motor installs in first casing, the lower part of first casing is equipped with holding chamber and its bottom and is open structure, the bottom releasable connection of first casing has the bottom, the driving motor electricity is connected with first cable, and the holding intracavity is located to this first cable, and it has the first wire of stranded, its characterized in that, oil gas recovery pump cable connection structure includes:

one end of the second cable penetrates into the accommodating cavity and is provided with a plurality of strands of second conducting wires which are in one-to-one correspondence with the first conducting wires, and the plurality of strands of second conducting wires are detachably connected with the plurality of strands of first conducting wires of the first cable in one-to-one correspondence through the wiring assembly;

2. The oil and gas recovery pump cable connection structure of claim 1, 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, the first connector is provided with a plurality of connecting plates arranged at intervals, one side of each connecting plate is provided with a first conducting strip, and a plurality of first wires at the other end of the first cable are in one-to-one correspondence with and connected with the first conducting strips; one end of the second cable is connected with the second connector, a connecting groove in one-to-one correspondence with the upper connecting plate of the first connector is arranged on the second connector, the second connector is detachably connected with the connecting plate of the first connector in an inserting mode through the connecting groove, a second conducting strip in one-to-one correspondence with the first conducting strip is arranged on one side of the connecting groove, and multiple second wires at the other end of the second cable are in one-to-one correspondence with the second conducting strip and connected with the second conducting strip.

3. The vapor recovery pump cable connection structure of claim 2, wherein the lower portion of the first housing is correspondingly provided with a connection portion engaged with the first connection sleeve, the connection portion is provided with a connection hole engaged with one end of the first connection sleeve, an upper end of the connection hole is provided with an internal thread structure threadedly connected with one end of the first connection sleeve, the connection hole is further communicated with the accommodation chamber, the other end of the second cable sequentially passes through the connection hole and the first connection sleeve, and wherein a portion of the second cable located in the connection hole is further sleeved with an explosion-proof ring.

4. An oil gas recovery pump connected in an oil gas recovery pipeline of a fuel dispenser and used for providing a negative pressure required for oil gas recovery, characterized by comprising the oil gas recovery pump cable connection structure of one of claims 1 to 3.

5. The oil and gas recovery pump of claim 4, further comprising:

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

the driving shaft of the driving motor rotatably penetrates through the first shell and the base and is fixedly connected with the rotor, the driving motor drives the rotor to rotate, the roller in the arc-shaped movable groove on the rotor rotates along with the rotor and is attached to the inner side wall of the second shell under the action of centrifugal force, gas in the first area is pushed to the second area and is output by the gas guide groove and the connecting joint corresponding to the second area, negative pressure is generated in the first area, or the gas in the second area is pushed to the first area and is output by the gas guide groove and the connecting joint corresponding to the first area, and negative pressure is generated in the second area.

6. The oil and gas recovery pump according to claim 5, further comprising a first spacer fixedly disposed between the lower end surface of the second casing and the upper end surface of the base, wherein a buffer sink groove is further disposed in the middle of the upper end surface of the base corresponding to the contour of the rotor, and the depth of the buffer sink groove is 0.02-3 mm.

7. The oil and gas recovery pump of claim 5, wherein the rollers comprise:

the connecting cover is in threaded connection with the open end of the third shell and used for packaging the magnetic column in the third shell;

and the end parts of the magnetic columns, which are far away from each other, are sleeved with metal magnetic conduction sleeves.

8. The oil and gas recovery pump according to claim 5, further comprising a heat radiation sleeve fixedly fitted around an outer peripheral side of the second casing, wherein a lower portion of the outer peripheral side of the second casing is provided with a lap joint portion of an annular structure, a lower end of the heat radiation sleeve abuts against the lap joint portion, and a lower end thereof does not exceed a lower end surface of the first casing;

9. The oil and gas recovery pump of claim 7, wherein the end surface of the connecting seat away from the second casing is provided with an extension part, the extension part is provided with a pair of insertion ports which correspond to the air guide grooves one by one and penetrate into the air guide grooves, a pair of connecting joints correspond to the pair of insertion ports one by one, one end of each connecting joint is inserted and fixed in the insertion ports, and a fire stopping ring is further arranged between the bottom of each insertion port and the air guide groove;

the upper end surface and the lower end surface of the second shell are both provided with first O-shaped sealing rings, and the end part of the connecting joint which is inserted and fixed in the inserting port is provided with a second O-shaped sealing ring;

the base is correspondingly provided with a penetrating hole for the driving shaft of the driving motor to penetrate through, an oil seal matched with the driving shaft of the driving motor is further arranged on the penetrating hole, a bearing matched with the driving shaft is further arranged on the penetrating hole, the outer ring of the bearing is fixedly connected with the penetrating hole, and a fleeing-preventing snap spring is further arranged below the driving shaft corresponding to the bearing.

10. A fuel dispenser, characterized in that it comprises an oil and gas recovery pump according to any one of claims 5 to 9.