CN210419363U

CN210419363U - Oil scraping device for oil-water separator

Info

Publication number: CN210419363U
Application number: CN201921199651.2U
Authority: CN
Inventors: 王鑫琦
Original assignee: Guangdong Pushi Deze Environmental Protection Co ltd
Current assignee: Guangdong Pushi Deze Environmental Protection Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-04-28
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses an oil scraping device for an oil-water separator. The oil scraper comprises an oil scraper plate and a telescopic driving piece for driving the oil scraper plate to horizontally reciprocate, wherein the telescopic driving piece is arranged outside an oil-water separator, the oil scraper plate is connected with a connecting rod, one end of the connecting rod is fixed with the oil scraper plate, a fixing assembly is arranged on the connecting rod, the fixing assembly realizes that the connecting rod is detachably connected with the telescopic end of the telescopic driving piece, the top of the oil-water separator is provided with a sliding groove for the connecting rod to slide, the tail end of the sliding groove is provided with a maintenance groove for taking out the oil scraper plate, and the oil scraper plate can be taken out through the maintenance groove at the top of the oil-water separator for maintenance, so that the maintenance is convenient; the oil scraping plate is driven to move back and forth through the telescopic driving piece to realize oil scraping, the telescopic driving piece is arranged outside the oil-water separator, the maintenance is convenient, and the occupation of the inner space of the oil-water separator is reduced.

Description

Oil scraping device for oil-water separator

Technical Field

The utility model relates to an oil-water separation field, concretely relates to frizing device that oil-water separator used.

Background

An oil-water separator is a device developed for recovering and utilizing oil from an oil-water mixture.

At present, oil-water separation mainly utilizes the gravity settling principle or other physical and chemical methods to remove impurities or complete the separation of oil and water according to the difference of density or chemical properties of water and oil.

The main oil-water separation methods include gravity separation, centrifugal separation, electric separation, adsorption separation, air flotation separation and the like, wherein the cost of the gravity separation and the air flotation separation is low, and the cost of the centrifugal separation and the starch grains is high.

The air floatation method is a method for purifying water by means of forming micro-bubbles in water and carrying flocs to float to the liquid surface. Provided that bubbles attached to the oil droplets can form oil and gas particles. The density difference between water and particles is increased by the presence of bubbles, and the particle diameter is larger than the crude oil droplets, so that the rising speed can be significantly increased by replacing the oil density with the particle density. That is, when 1 bubble (or multiple bubbles) is attached to 1 oil drop, the vertical rising speed can be increased, so that oil drops with the diameter smaller than 50 μm can be removed.

In the current patent, application number 200820178124.9's chinese utility model discloses an oil removal equipment, including box, filter screen, bubble generator and oil extraction device, box oil removal equipment box is separated into intake chamber, process chamber and the drainage chamber of bottom intercommunication each other by left and right upper folded plate, is equipped with the filter screen in the intake chamber, and the process chamber is separated into left process chamber and the right process chamber of top intercommunication each other by lower folded plate, and bubble generator is fixed to be set up in the bottom of left process chamber. The oil discharge device comprises a circulating reciprocating oil scraping device driven by a motor, an oil collecting tank and an oil discharge pipe, wherein the oil collecting tank is fixedly arranged at the tail end of the circulating reciprocating oil scraping device and used for receiving dirty oil scraped by the oil scraping plate.

This kind of oil removal device carries out solid-liquid separation through the filter screen to the sewage that gets into in the box, gets rid of thick, large granule and residue through the filter screen, produces the bubble through the bubble generator, and the bubble of come-up drives the come-up with the greasy dirt in aquatic to make oil and water take place to separate, the oil on rethread frizing device's scraper blade is dialled the oil on upper strata to the oil trap in circulating and is collected, and the water on lower floor gets into and arranges away in the drainage chamber, accomplishes oil-water separation's process, realizes the recycle of oil.

However, after the oil scraping device is used for a period of time, the driving part and the oil scraping plate need to be maintained or replaced, and the oil scraping device is not convenient to maintain or replace because the oil scraping device is arranged in the inner cavity of the oil separation device.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide an oil scraping device that oil water separator used, it includes flexible driving piece and scraper blade, sets up maintenance groove and spout on oil water separator. The oil scraping device for the oil-water separator has the advantage of convenience in maintenance.

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

the utility model provides a frizing device that oil water separator used, includes the frizing, still includes the drive the frizing level reciprocating motion's flexible driving piece, flexible driving piece sets up outside oil water separator, be connected with the connecting rod on the frizing, the one end of connecting rod with the frizing is fixed, be provided with fixed subassembly on the connecting rod, fixed subassembly is realized the connecting rod with the flexible end of flexible driving piece can be dismantled and be connected, and the confession has been seted up at the oil water separator top the gliding spout of connecting rod, the end of spout has been seted up and has been supplied to take out the maintenance groove of frizing.

Through the arrangement, the oil scraping plate is driven to move back and forth by the telescopic driving piece to achieve the purpose of horizontal oil scraping, and the telescopic driving piece is arranged outside the oil-water separator, so that the telescopic driving piece is convenient to install, overhaul and maintain, and the space occupation of the telescopic driving piece along with the inside of the oil-water separator is reduced; the connecting rod slides along the sliding chute through the sliding chute formed in the top of the oil-water separator, so that the moving stability of the moving scraper is improved; through setting up in the terminal maintenance groove of spout, the connecting rod of being connected with the frizing can be dismantled through the flexible end of fixed subassembly with flexible driving piece and be connected, and then can take out the frizing from the maintenance groove and change or maintain, and it is convenient to maintain, and only sets up spout and maintenance groove for oil water separator's whole closure is better, reduces the possibility that carries out secondary pollution to the oil water mixture in the oil water separator.

Preferably, the telescopic driving member is one of a pneumatic telescopic cylinder, a hydraulic telescopic cylinder and an electric telescopic cylinder.

As preferred, fixed subassembly includes fixing base, connecting block and threaded connection spare, the fixing base with the connecting rod is fixed, offer the confession on the fixing base the spread groove of the flexible end grafting of flexible driving piece, the connecting block for the fixing base activity set up and can with the outer wall butt of the flexible end of flexible driving piece, threaded connection spare will the connecting block with the fixing base is connected, just threaded connection spare can drive the connecting block with the flexible end butt of flexible driving piece or keep away from the flexible end of flexible driving piece.

Through setting up like this, flexible end of flexible driving piece is pegged graft in the spread groove of fixing base, and the flexible end that is close to flexible end of flexible driving piece and the outer wall butt of the flexible end of flexible driving piece or keeps away from flexible driving piece through threaded connection spare drive connecting block to the realization is to the clamp of the flexible end of flexible driving piece or dismantle, is convenient for dismantle the flexible end of flexible driving piece and maintains.

Preferably, the fixing seat is further provided with a conical guide groove, the conical guide groove is communicated with the connecting groove, the connecting blocks are at least two, the connecting blocks are in sliding fit with the inner wall of the conical guide groove, and the threaded connecting piece drives the connecting blocks to slide along the conical guide groove to be close to or far away from the center of the connecting groove.

Through setting up like this, flexible end of flexible driving piece is pegged graft in the spread groove of fixing base, and threaded connection spare drive connecting block slides along the toper guide way to the connecting block is close to or keeps away from the center of spread groove when sliding along the toper guide way, and then reaches the flexible end of pressing from both sides tight fixed flexible driving piece or the contact presss from both sides the tight separation of dismantling with flexible end and the connecting rod of flexible driving piece to the flexible end of flexible driving piece, convenient maintenance.

Preferably, the connecting blocks are at least two, the threaded connecting piece corresponds to each connecting block and is provided with one, one end of the threaded connecting piece is connected with the fixed seat, and the other end of the threaded connecting piece is connected with the connecting block.

Through setting up like this, fall into two piece at least settings with the connecting block setting, convenient processing is favorable to realizing the quick dismantlement of connecting rod and flexible driving piece.

Preferably, still be connected with dustproof sunshade on the connecting rod, dustproof sunshade is located the top of spout, oil water separator is last to have seted up and to have held dustproof sunshade's holding tank, dustproof sunshade with the connection can be dismantled to the connecting rod.

Through setting up like this, dustproof sunshade with the connecting rod is fixed, follows the removal of connecting rod and removes, and dustproof sunshade is located the top of spout, shelters from through the impurity to the oil water separator is outer, further improves oil water separator's closure, reduces the possibility that causes secondary pollution to the liquid in the oil water separator.

Preferably, the dust cover is connected to the link by a screw.

Preferably, dust collecting grooves are formed in the two sides, located on the dustproof shielding plate, of the oil-water separator, dust removing scrapers are arranged on the oil-water separator, dust removing grooves for the dustproof shielding plate to penetrate through are formed in the dust removing scrapers, and the dust removing grooves are in contact with the upper surface and the two side faces of the dustproof shielding plate.

Through setting up like this, through setting up dust removal scraper blade, the dust screen passes the dust groove, and then the dust removal scraper blade scrapes the impurity attached to on dust screen upper surface and the side and falls to the dust groove in, reduces because of the dust screen along with the in-process of connecting rod removal with impurity bring into oil water separator's possibility.

Preferably, the maintenance groove is provided with a dustproof cover plate.

Preferably, one side of the dustproof cover plate is hinged with the oil-water separator, and the other side of the dustproof cover plate is rotatably covered or opened on the hinged position to close or open the maintenance groove.

Through setting up like this, through setting up dustproof apron, block debris, further improve oil water separator's closure, it is articulated with oil water separator through setting up dustproof apron, conveniently open or close the maintenance groove.

Preferably, the hinged position of the dustproof cover plate is provided with a reset torsion spring, one end of the reset torsion spring is connected with the dustproof cover plate, the other end of the reset torsion spring is connected with the oil-water separator, and the reset torsion spring enables the dustproof cover plate to be in a normally closed state.

Compared with the prior art, the utility model discloses profitable technological effect has been obtained:

1. the oil scraping plate can be taken out for maintenance through a maintenance groove at the top of the oil-water separator, and the maintenance is convenient; the oil scraping plate is driven to move back and forth through the telescopic driving piece to realize oil scraping, the telescopic driving piece is arranged outside the oil-water separator, the maintenance is convenient, and the occupation of the inner space of the oil-water separator is reduced.

2. Through setting up fixed subassembly, realize flexible driving piece's flexible end and connecting rod can dismantle and be connected, and then be convenient for realize taking out the scraper blade from water oil separating and maintain.

3. Through setting up dustproof sunshade, shield the spout, reduce debris and get into in the oil water separator through the spout and cause the possibility of polluting to liquid in it.

4. Through setting up dustproof apron, shield the maintenance groove, reduce debris and get into in the oil water separator through the maintenance groove and cause the possibility of polluting to liquid in it.

Drawings

FIG. 1 is a schematic view of an oil-water separator according to an embodiment of the present invention;

FIG. 2 is a schematic view of the oil-water separator of the embodiment of the present invention with the outer cover removed;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is an enlarged view of section C of FIG. 2;

FIG. 6 is a schematic view of the connection of the connecting rod to the dust shield and the telescopic end of the telescopic driving member according to the embodiment of the present invention;

FIG. 7 is a schematic view of the inside of the oil-water separator according to the embodiment of the present invention;

fig. 8 is an enlarged view of a portion D in fig. 7.

Wherein, the technical characteristics that each reference numeral refers to are as follows:

1. an oil-water separator; 101. a solid-liquid separation chamber; 102. a bubble generation chamber; 103. an oil-water separation chamber; 104. a drainage cavity; 105. an oil sump; 1051. an oil discharge pipe; 106. a water discharge tank; 1061. a drain pipe; 107. an exhaust port; 108. a chute; 109. maintaining the groove; 1091. a dust-proof cover plate; 10911. a horizontal plane; 10912. an inclined surface; 1092. a cover plate groove; 2. an oil scraping device; 201. a scraper plate; 2011. a connecting rod; 202. a telescopic driving member; 3. a partition plate; 4. a filter screen; 5. a bubble generator; 6. a fixing assembly; 601. a fixed seat; 6011. a first connecting seat; 6012. a second connecting seat; 602. connecting blocks; 603. a threaded connection; 7. a dust-proof shield; 8. accommodating grooves; 9. a dust collecting groove; 10. a dust removal scraper; 11. a housing; 12. and (4) screws.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following specific embodiments.

Examples

Referring to fig. 1, fig. 2 and fig. 7, the present embodiment discloses an oil scraping device 2 for an oil-water separator, which includes an oil scraping plate 201 and a telescopic driving member 202, wherein the telescopic driving member 202 is disposed outside the oil-water separator 1, in the present embodiment, the telescopic driving member 202 is a pneumatic telescopic cylinder, in other embodiments, the telescopic driving member 202 may also be a hydraulic telescopic cylinder or an electric telescopic cylinder, the telescopic driving member 202 drives the oil scraping plate 201 to horizontally reciprocate in the oil-water separator 1, and a lower end of the oil scraping plate 201 is located in an oil layer in layered liquid in the oil-water separator 1.

Referring to fig. 7, a partition plate 3 is arranged in the oil-water separator 1, the partition plate 3 divides the space inside the oil-water separator 1 into a solid-liquid separation chamber 101, a bubble generation chamber 102, an oil-water separation chamber 103 and a drainage chamber 104, and a filter screen 4 is arranged in the solid-liquid separation chamber 101 for filtering solid impurities and realizing solid-liquid separation;

the bubble generator 5 is arranged in the bubble generating cavity 102, and the oil scraping device 2 is arranged in the oil-water separation cavity 103, in the embodiment, the bubble generator 5 is a common micro-bubble generator in the market;

an oil collecting tank 105 is arranged on the inner wall of the oil-water separation cavity 103 close to the drainage cavity 104, an oil drainage pipe 1051 communicated with the outside of the oil-water separator 1 is arranged at the bottom of the oil collecting tank 105, and an oil drainage valve (not shown in the figure) is arranged on the oil drainage pipe 1051.

The bubble generator 5 generates bubbles, the floating bubbles carry the oil in the sewage to float, the telescopic driving piece 202 drives the oil scraping plate 201 to move towards the oil collecting tank 105, the oil scraping plate 201 scrapes the oil layer device floating above the water layer into the oil collecting tank 105, and then the oil is discharged out of the oil-water separator 1 through the oil collecting tank 105.

Referring to fig. 7, a drainage groove 106 is arranged in the drainage cavity 104, a drainage pipe 1061 is communicated with the bottom of the drainage groove 106, a drainage valve (not shown) is arranged on the drainage pipe 1061, an exhaust port 107 is arranged above the drainage cavity 104, and an exhaust valve (not shown) is arranged at the exhaust port 107.

Referring to fig. 2, fig. 3, fig. 6 and fig. 7, be connected with connecting rod 2011 on the frizing 201, the one end and the frizing 201 of connecting rod 2011 are fixed, be provided with fixed subassembly 6 on the connecting rod 2011, fixed subassembly 6 is connected with the flexible end of flexible driving piece 202, it is connected to realize that connecting rod 2011 and flexible end of flexible driving piece 202 can be dismantled, oil water separator 1 top is seted up and is supplied the gliding spout 108 of connecting rod 2011, the maintenance groove 109 that supplies to take out frizing 201 is seted up to the end of spout 108, spout 108 is "T" shape with maintenance groove 109 and distributes.

Referring to fig. 3 and fig. 6, the fixing assembly 6 includes a fixing base 601, a connecting block 602 and a threaded connection member 603, the fixing base 601 is fixed to the connecting rod 2011, a connecting slot (not labeled in the figures) for inserting the telescopic end of the telescopic driving member 202 is formed in the fixing base 601, the connecting block 602 is movably disposed relative to the fixing base 601 and can abut against an outer wall of the telescopic end of the telescopic driving member 202, the threaded connection member 603 connects the connecting block 602 with the fixing base 601, and the threaded connection member 603 can drive the connecting block 602 to abut against the telescopic end of the telescopic driving member 202 or keep away from the telescopic end of the telescopic driving.

Referring to fig. 3 and 6, the fixing base 601 is divided into a first connecting base 6011 and a second connecting base 6012 connected to the first connecting base 6011 along a center of the connecting slot in a bisection manner, the first connecting base 6011 is connected to the second connecting base 6012 through a screw 12, an insertion slot (not labeled in the drawing) for connecting a connecting rod 2011 is formed in the first connecting base 6011 and the second connecting base 6012, and the connecting rod 2011 is tightly fitted to the insertion slot.

Referring to fig. 6, a tapered guide groove is further formed in the fixing base 601, the tapered guide groove (not labeled in the figure) is communicated with the connecting groove, at least two connecting blocks 602 are arranged, the connecting blocks 602 are in sliding fit with the inner wall of the tapered guide groove, and the threaded connection member 603 drives the connecting blocks 602 to slide close to or away from the center of the connecting groove along the tapered guide groove.

Referring to fig. 3 and 6, at least two connecting blocks 602 are provided, one threaded connector 603 is provided corresponding to each connecting block 602, one end of the threaded connector 603 is connected to the fixing base 601, and the other end of the threaded connector 603 is connected to the connecting block 602.

Referring to fig. 3, 6 and 7, the connecting rod 2011 is further connected to a dust-proof shield 7, the dust-proof shield 7 is located above the sliding groove 108, the oil-water separator 1 is provided with a receiving groove 8 for receiving the dust-proof shield 7, the dust-proof shield 7 is detachably connected to the connecting rod 2011, and in this embodiment, the dust-proof shield 7 is connected to the fixing base 601 through a screw 12.

Referring to fig. 2, 4 and 5, dust collecting grooves 9 are formed in the oil-water separator 1 at two sides of the dust-proof shield 7, a dust removing scraper 10 is arranged on the oil-water separator 1, a dust removing groove (not labeled in the figures) for the dust-proof shield 7 to pass through is formed in the dust removing scraper 10, and the dust removing groove is in contact with the upper surface and two side surfaces of the dust-proof shield 7.

Referring to fig. 2, 4 and 5, in this embodiment, at least two sets of dust collecting grooves 9 are distributed along the moving direction of the dust-proof shield 7, and two sets of dust collecting grooves 9 are distributed on both sides of the width direction of the maintenance groove 109, so that the dust-proof shield 7 connected to both sides of the connecting rod 2011 can be well dedusted, and the possibility that the dust and other impurities on the dust-proof shield 7 move along with the dust-proof shield 7 is further reduced.

Referring to fig. 2, 7 and 8, a dust-proof cover plate 1091 is disposed on the maintenance groove 109, the dust-proof cover plate 1091 is disposed on each of two sides of the sliding groove 108, one side of the dust-proof cover plate 1091 is hinged to the oil-water separator 1, the other side of the dust-proof cover plate 1091 is rotatably covered or opened on the maintenance groove 109 around the hinged portion, a reset torsion spring (not shown in the figure) may be disposed on the hinged portion of the dust-proof cover plate 1091, one end of the reset torsion spring is connected to the dust-proof cover plate 1091, the other end of the reset torsion spring is connected to the oil-water separator 1, the reset torsion spring enables the dust-proof cover plate 1091 to be in a normally closed state, the reset torsion spring is convenient for.

Referring to fig. 7 and 8, a cover plate groove 1092 for accommodating the dust-proof cover plate 1091 is formed in the oil-water separator 1, the cover plate groove 1092 is formed in an inclined manner, the cover plate groove 1092 forms an included angle of 15 to 20 degrees with the top surface of the oil-water separator 1, the dust-proof cover plate 1091 comprises a horizontal surface 10911 and an inclined surface 10912, when the dust-proof cover plate 1091 is accommodated in the cover plate groove 1092, the inclined surface 10912 of the dust-proof cover plate 1091 contacts with the bottom surface of the cover plate groove 1092, and the horizontal surface 10911 of the dust-proof cover plate 1091 is flush with the top surface of the oil-water separator 1, so that the movement of the.

Referring to fig. 1, the oil-water separator 1 further includes an outer cover 11, one side of the outer cover 11 is hinged to the oil-water separator 1, and the outer cover 11 is disposed to shield the telescopic driving member 202 exposed outside the oil-water separator 1 and effectively prevent external impurities such as dust from falling on the top surfaces of the dust-proof cover plate 1091 and the dust-proof shielding plate 7.

The utility model discloses use and principle of embodiment:

when the oil-water separator 1 normally works, solid-liquid mixed sewage enters the solid-liquid separation cavity 101 from an inlet of the oil-water separator 1, passes through the solid-liquid separation cavity 101, solid impurities are filtered by the filter screen 4, the filtered liquid is an oil-water mixture, the liquid continuously enters the bubble generation cavity 102 in the oil-water separator 1, then the bubble generator 5 works to generate bubbles, so that oil in the oil-water mixed liquid is brought to the upper layer of the liquid, then the telescopic driving piece 202 works to drive the connecting rod 2011 to move along the sliding groove 108 through extension or shortening, so that the oil scraping plate 201 is driven to move in the oil-water separation cavity 103, the oil scraping plate 201 scrapes the oil on the upper layer of the liquid surface in the oil-water separation cavity 103 into the oil collecting tank 105, so that oil-water separation is completed, the collected oil is discharged through the oil discharge pipe 1051, and the water entering the water discharge cavity 104 is discharged through.

When the oil scraping plate 201 or the telescopic driving member 202 needs to be maintained, the outer cover 11 on the oil-water separator 1 is opened, the telescopic driving member 202 drives the connecting rod 2011 to the junction of the maintenance groove 109 and the sliding groove 108, next, the screw 12 used for fixing the dustproof shielding plate 7 is disassembled, the dustproof shielding plate 7 is separated from the connecting rod 2011, then the threaded connecting piece 603 on the connecting block 602 is unscrewed, the connecting block 602 is separated from the telescopic end of the telescopic driving member 202 in an abutting mode, and the telescopic end of the telescopic driving member 202 is separated from the fixing seat 601 of the fixing assembly 6; next, the fixing base 601 is detached from the link 2011, and then the link 2011 is taken out of the maintenance groove 109 together with the oil scraping plate 201, so that the oil scraping plate 201 and the telescopic driving member 202 can be maintained.

After the oil scraping plate 201 is taken out or the oil scraping plate 201 is placed in the oil-water separator 1, the dustproof cover plate 1091 is driven by the reset torsion spring to seal the maintenance groove 109, so that impurities in the maintenance process are prevented from entering the oil-water separator 1 from the maintenance groove 109.

After the maintenance is completed, the oil scraping plate 201 is put back into the oil-water separator 1 in the reverse order, and then the connecting rod 2011 is connected with the telescopic driving member 202 through the fixing assembly 6, and the dust-proof shielding plate 7 is connected with the connecting rod 2011 through the screw 12.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used in the specification, the terms are used for convenience of description and do not limit the utility model in any way.

Claims

1. The utility model provides a frizing device that oil water separator used, includes the frizing, its characterized in that still includes the drive the frizing level round trip movement's flexible driving piece, flexible driving piece sets up outside oil water separator, be connected with the connecting rod on the frizing, the one end of connecting rod with the frizing is fixed, be provided with fixed subassembly on the connecting rod, fixed subassembly is realized the connecting rod with the flexible end of flexible driving piece can be dismantled and connect, and the confession has been seted up at oil water separator top the gliding spout of connecting rod, the end of spout has been seted up and has been supplied to take out the maintenance groove of frizing.

2. The oil scraping device for an oil-water separator as claimed in claim 1, wherein the telescopic driving member is one of a pneumatic telescopic cylinder, a hydraulic telescopic cylinder and an electric telescopic cylinder.

3. The oil scraping device for the oil-water separator as claimed in claim 1 or 2, wherein the fixing assembly comprises a fixing seat, a connecting block and a threaded connecting piece, the fixing seat is fixed to the connecting rod, a connecting groove for the telescopic end of the telescopic driving piece to be inserted is formed in the fixing seat, the connecting block is movably arranged relative to the fixing seat and can be abutted to the outer wall of the telescopic end of the telescopic driving piece, the threaded connecting piece is connected with the fixing seat, and the threaded connecting piece can drive the connecting block to be abutted to the telescopic end of the telescopic driving piece or keep away from the telescopic end of the telescopic driving piece.

4. The oil scraping device for the oil-water separator as claimed in claim 3, wherein the fixing base is further provided with at least two tapered guide grooves, the tapered guide grooves are communicated with the connecting groove, the connecting blocks are slidably engaged with the inner wall of the tapered guide grooves, and the threaded connecting member drives the connecting blocks to slide along the tapered guide grooves to be close to or far from the center of the connecting groove.

5. The oil scraping device for the oil-water separator as claimed in claim 4, wherein one threaded connector is provided corresponding to each connecting block, one end of the threaded connector is connected to the fixing base, and the other end of the threaded connector is connected to the connecting block.

6. The oil scraper of claim 1, 2, 4 or 5, wherein the connecting rod is further connected to a dust-proof shield, the dust-proof shield is located above the sliding groove, the oil separator is provided with a receiving groove for receiving the dust-proof shield, and the dust-proof shield is detachably connected to the connecting rod.

7. The oil wiper for an oil-water separator according to claim 6, wherein said dust-proof shield is connected to said connecting rod by a screw.

8. The oil separator according to claim 6, wherein dust collecting grooves are formed in the oil separator on both sides of the dust-proof shield, a dust-removing scraper is provided in the oil separator, dust-removing grooves through which the dust-proof shield passes are formed in the dust-removing scraper, and the dust-removing grooves are in contact with an upper surface and both side surfaces of the dust-proof shield.

9. The oil scraping device for an oil-water separator according to any one of claims 1, 2, 4, 5, 7 or 8, wherein a dust-proof cover plate is provided on the maintenance groove.

10. The oil scraper of claim 9, wherein the dust-proof cover is hinged to the oil-water separator at one side and is adapted to close or open the maintenance groove by rotating around the hinge at the other side.