CN113511702A

CN113511702A - Sewage treatment's profit autosegregation device

Info

Publication number: CN113511702A
Application number: CN202110999424.3A
Authority: CN
Inventors: 盖明秀
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-29
Filing date: 2021-08-29
Publication date: 2021-10-19

Abstract

The invention relates to an oil-water automatic separation device for sewage treatment, which solves the problems that in the prior art, clear oil is not thorough and oil content is easy to contain water; the technical scheme includes that the device comprises an oil separation tank, an oil filtering unit, an oil scraping plate, a partition plate, a water collecting tank and an oil storage tank, wherein the oil filtering unit is positioned in the oil separation tank, the partition plate is positioned in the middle of the oil separation tank and divides the oil separation tank into two parts, liquid channels are arranged on the left end surface and the right end surface of the partition plate, the water collecting tank is positioned below the oil separation tank, the water collecting tank is internally provided with a water scraping plate capable of moving up and down, the water collecting tank is divided into two chambers by the water scraping plate, a water outlet of the oil separation tank is communicated with the chambers above the oil separation tank through a pipeline, the oil storage tank is positioned in the chambers above the oil separation plate and is communicated with the oil filtering unit through oil pipes, the oil scraping plate is respectively arranged on the left side and the right side in the oil separation tank, the oil scraping plate is close to the lower part of the oil filtering unit, and is in threaded connection with the water scraping plate below through a rotating shaft; the invention has novel conception, smart structure and strong practicability.

Description

Sewage treatment's profit autosegregation device

Technical Field

The invention relates to the field of sewage treatment machinery, in particular to an automatic oil-water separation device for sewage treatment.

Background

The existing oil-water separation generally utilizes the difference of specific gravity of suspended matters and water in the waste water to achieve the separation purpose. The structure of the oil separation tank adopts a horizontal flow mode mostly, oily wastewater enters the oil separation tank with a rectangular plane through a water distribution tank, slowly flows along the horizontal direction, an oil product floats on the water surface in the flow, and is pushed into an oil collecting pipe by an oil collecting pipe or an oil scraper arranged on the surface of the tank to flow into a dehydration tank; this method has the following problems: firstly, the oil amount collected is uncertain, so that the position of an oil discharge port cannot be accurately determined; secondly, if new mixed liquid is continuously injected during the working period of controlling the oil discharging liquid, the liquid level fluctuation is improved, the oil outlet can overflow into the water layer, and the separation is unclear, so that no liquid is injected during oil discharging, no oil is discharged during liquid injecting, and the oil-water separator does not work continuously; and finally: the thin oil layer is difficult to be completely discharged, or more water can be brought out when less oil layers are discharged, secondary separation is needed, and the efficiency is low.

Disclosure of Invention

In view of the above situation, the present invention provides an automatic oil-water separator for sewage treatment, which solves the problems of incomplete oil cleaning and easy water content in oil in the prior art.

The technical scheme for solving the problem is as follows: the oil filter unit is positioned in the oil separation tank and is close to the upper part, the partition plate is positioned in the middle of the oil separation tank and is placed in the front-back direction, the partition plate divides the oil separation tank into two parts which are bilaterally symmetrical, liquid channels which are used for communicating the oil separation tank with the oil filter unit are respectively arranged on the left end surface and the right end surface of the partition plate, the water collecting tank is positioned below the oil separation tank, a water-stop plate which can move up and down is arranged in the water collecting tank, the water-stop plate divides the water collecting tank into an upper independent chamber and a lower independent chamber, a water outlet of the oil separation tank is communicated with the chambers above the water-stop plate through a pipeline, the oil storage tank is positioned in the chambers above the oil separation plate and is communicated with the oil filter unit through an oil pipe, the oil-stop plate is respectively arranged at the left side and the right side in the oil separation tank, the oil scraping plate is close to the lower part of the oil filtering unit, the oil scraping plate is in threaded connection with a water-stop plate below the oil scraping plate through a rotating shaft, the water-stop plate can drive the oil scraping plate to rotate in a reciprocating mode by moving up and down, oil on the upper layer of the oil separating pool is scraped into the oil filtering unit when the oil scraping plate rotates, and the oil is precipitated by the oil filtering unit for a certain time and then discharged into the oil storage tank.

Preferably, the oil separation tank comprises an outer barrel, a middle barrel and an inner barrel which are coaxial, intervals are arranged between the outer barrel and the middle barrel, between the middle barrel and the inner barrel, the upper end and the lower end of the outer barrel are sealed, the upper end and the lower end of the middle barrel are opened, intervals are arranged between the upper end and the lower end of the middle barrel and between the upper end and the lower end of the outer barrel, the opening of the inner barrel is downward, the lower wall of the inner barrel is positioned below the lower end of the middle barrel, the upper end of the inner barrel is sealed and positioned below the upper end of the middle barrel, the axis of the partition plate is coaxial with the axis of the outer barrel, two ends of the partition plate are fixed on the inner wall of the outer barrel, the middle barrel and the inner barrel are divided into two parts which are symmetrical left and right by the partition plate, the side walls of the outer barrel on the left side and the right side of the partition plate are respectively provided with a water inlet and a water outlet, the water inlet and the water outlet are close to the upper part of the outer barrel and positioned below the oil scraping plate, the inner barrel is internally provided with a sleeve which is coaxial with the inner barrel, the upper end of the sleeve is closed and is positioned above the inner barrel, the lower end of the sleeve is fixedly connected with the lower end face of the outer barrel, the side walls of the sleeve at the left side and the right side of the clapboard are both provided with through holes, and the through holes are close to the upper part of the sleeve.

Preferably, the liquid channel comprises a through groove along the front-back direction of the partition board, the tail end of the through groove is communicated with the oil filtering unit, through holes perpendicular to the through groove are formed in the left side wall and the right side wall of the through groove, a plurality of through holes are arranged along the front-back direction of the partition board, a one-way valve is arranged in each through hole, a baffle is arranged in the oil separating tank and is positioned above the through holes, the outer end surface of the baffle is tightly attached to the inner end surface of the outer barrel, the lower end surface of the oil scraping plate is positioned below the upper end surface of the inner barrel, the outer end of the oil scraping plate is attached to the inner wall of the outer barrel, an avoiding groove is arranged at a position close to the upper end surface of the inner barrel, the inner barrel can not interfere with the rotation of the oil scraping plate, the upper end surface of the oil scraping plate is attached to the baffle, an avoiding groove is formed at a position close to the oil filtering unit, the avoiding groove ensures that the oil filtering unit does not interfere the rotation of the oil scraping plate; the rotating shaft is positioned in the sleeve and is coaxial with the sleeve, and the lower end of the rotating shaft penetrates through the outer barrel and is connected with the water-stop sheet; the rotating shaft is connected with the water-stop plate through non-self-locking threads, and the thread length satisfies that when the water-stop plate moves downwards from the beginning to the lowest end of the displacement of the water-stop plate, the rotating shaft drives the oil scraping plate to rotate for half a circle.

Preferably, the oil filtering unit comprises a sleeve, the sleeve is coaxial with the oil separation pool, a through hole communicated with a cavity inside the sleeve is formed in the joint of the sleeve and the partition plate, the through hole is close to the lower side of the sleeve, an annular groove is formed in the sleeve, the annular groove is close to the lower side of the sleeve and is located above the baffle, an oil separation film is installed in the annular groove, an oil filtering barrel is sleeved in the sleeve, an interval is formed between the oil filtering barrel and the sleeve, an interval is formed between the upper end of the oil filtering barrel and the sleeve, a notch is formed in the upper end face of the oil filtering barrel, and the notch is close to the right side of the sleeve.

Preferably, a transmission shaft coaxial with the oil filtering barrel is installed in the oil filtering barrel, the lower end of the transmission shaft penetrates through the sleeve and is positioned below the sleeve, the transmission shaft is connected with the rotating shaft through a one-way clutch, the rotating shaft can drive the transmission shaft to rotate in a one-way mode, a plurality of push plates along the radial direction of the transmission shaft are evenly distributed on the circumference of the transmission shaft, the outer end face of each push plate is attached to the inner wall of the oil filtering barrel, the push plates evenly divide the inside of the oil filtering barrel into a plurality of spaces, a supporting barrel coaxial with the oil filtering barrel is installed at the lower end of the oil filtering barrel, a supporting plate is installed at the upper end face of the supporting barrel, a vertical L-shaped plate is installed in the supporting barrel, the supporting barrel is divided into two independent cavities by the L-shaped plate, and oil ports are formed in the supporting plate of an acute angle area corresponding to the L-shaped plate and the bottom surface of the oil filtering barrel, all seted up a sector groove on the backup pad of the obtuse angle region that corresponds with the L template and the oil filter bucket bottom surface, the sector groove on install and separate the oil film, seted up a through-hole on the sleeve lower extreme terminal surface of the acute angle region that corresponds with the L template, install the check valve on the through-hole, install one with the acute angle region that the L template corresponds and rotate the oil pipe of being connected with the pivot, seted up the fluid passageway coaxial with the pivot in the pivot, fluid passageway lower extreme export be located the batch oil tank in.

Preferably, the position cover that the transmission shaft lower extreme is located to support the bucket be equipped with a adapter sleeve, the adapter sleeve cavity, the position that the transmission shaft is located the adapter sleeve set up to be a diameter less than the connecting axle of transmission shaft, connecting axle and adapter sleeve between have the interval, the fluid passageway with adapter sleeve and connecting axle between the interval communicate with each other.

Preferably, the water-stop sheet on install the apopore, install the plugging device that can reciprocate on the apopore, plugging device including installing in the apopore and the plugging plate that can reciprocate, the plugging plate is with the apopore shutoff when being located the apopore, plugging plate below be connected with a horizontally connecting plate through the montant, the connecting plate on set up the through-hole that link up the connecting plate from top to bottom, the connecting plate with the water-stop sheet between through spring coupling, the catch basin under install outlet conduit on the terminal surface, the catch basin under install vertical ejector pin on the terminal surface, water-stop sheet and catch basin between install overload device.

Preferably, the fixing device fixes the position of the water-stop sheet, the water-stop sheet comprises a positioning pin installed on the side wall of the water-stop sheet, the positioning pin can horizontally move on the water-stop sheet, a spring is installed between the positioning pin and the water-stop sheet, and a positioning groove matched with the positioning pin is formed in the side wall of the water collecting tank.

The device has the following advantages:

1, in the oil-water separation process, the water outlet amount through sewage treatment controls the oil scraping plate to rotate in a reciprocating mode to scrape the upper oil component intermittently, so that the oil component enters the oil filtering unit, the upper oil component can be cleared out of the oil separation tank in time, and the filtering effect is prevented from being influenced by too much oil.

2, through setting up oil strain unit, sleeve to and oil strain bucket cooperation oil-separating film, can realize no matter how much the oil content, can both guarantee that the oil reservoir of top oozes into in the oil strain bucket gradually, what can guarantee to enter into the oil strain bucket when oozing into at every turn is the oil content of many times accumulations, the moisture that the reduction oil content contains as far as possible.

3, in the process of oil-water separation, the oil scraping plate is controlled by the water yield of sewage treatment to scrape the upper oil component intermittently, so that the oil component enters the oil filtering unit, and the upper oil component can be removed out of the oil separation tank in time; the control method does not need to consider the arrangement of the oil outlet position, does not need to stop when scraping oil, and can improve the efficiency.

Drawings

FIG. 1 is a front sectional view of the present invention in use.

Fig. 2 is a top sectional view of the oil interceptor of the present invention.

Fig. 3 is a top sectional view of an oil filter unit according to the invention.

Fig. 4 is a front sectional view of an oil filter unit according to the invention.

Fig. 5 is a partial enlarged view of the invention at a in fig. 1.

Fig. 6 is a partially enlarged view of the present invention at the time of water discharge at a in fig. 1.

Fig. 7 is an enlarged view of a portion of the overload device of fig. 1 in accordance with the present invention.

Fig. 8 is a partial enlarged view of the present invention at B in fig. 4.

Fig. 9 is a top sectional view of the support plate of the present invention attached to an L-shaped plate.

Detailed Description

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1 to 9, the invention comprises an oil separation tank 1, an oil filtering unit 2, an oil scraping plate 3, a partition plate 4, a water collecting tank 5 and an oil storage tank 6, wherein the oil filtering unit 2 is positioned in the oil separation tank 1 and close to the upper part, the partition plate 4 is positioned in the middle of the oil separation tank 1 and is placed in the front-back direction, the oil separation tank 1 is divided into two parts which are bilaterally symmetrical by the partition plate 4, liquid channels 8 for communicating the oil separation tank 1 with the oil filtering unit 2 are respectively arranged on the left end surface and the right end surface of the partition plate 4, the water collecting tank 5 is positioned below the oil separation tank 1, a water baffle 7 which can move up and down is arranged in the water collecting tank 5, the water baffle 7 divides the water collecting tank 5 into an upper independent chamber and a lower independent chamber, a water outlet of the oil separation tank 1 is communicated with the chamber above the water baffle 7 through a pipeline, the oil storage tank 6 is positioned in the chamber above the oil separation tank and is communicated with the oil filtering unit 2 through an oil pipe, the oil scraping plate 3 is arranged in the oil separation pool 1 in a left-right mode, the oil scraping plate 3 is close to the lower portion of the oil filtering unit 2, the oil scraping plate 3 is in threaded connection with a water-stop plate 7 below through a rotating shaft 9, the water-stop plate 7 can drive the oil scraping plate 3 to rotate in a reciprocating mode due to up-down movement, oil on the upper layer of the oil separation pool 1 is scraped into the oil filtering unit 2 when the oil scraping plate 3 rotates, and the oil is precipitated for a certain time through the oil filtering unit 2 and then discharged into the oil storage tank 6.

The oil separation tank 1 comprises an outer barrel 101, a middle barrel 102 and an inner barrel 103 which are coaxial, the outer barrel 101, the middle barrel 102, the inner barrel 103 are spaced, the upper end and the lower end of the outer barrel 101 are sealed, the upper end and the lower end of the middle barrel 102 are open, the upper end and the lower end of the middle barrel 102 are spaced from the upper end and the lower end of the outer barrel 101, the inner barrel 103 is open downwards, the lower wall of the inner barrel 103 is positioned below the lower end of the middle barrel 102, the upper end of the inner barrel 103 is sealed and positioned below the upper end of the middle barrel 102, the axis of the partition plate 4 is coaxial with the axis of the outer barrel 101, the two ends of the partition plate 4 are fixed on the inner wall of the outer barrel 101, the middle barrel 102 and the inner barrel 103 are divided into two parts which are symmetrical left and right by the partition plate 4, the side walls of the outer barrel 101 at the left side and the right side of the partition plate 4 are respectively provided with a water inlet and a water outlet, the water inlet and the water outlet are both close to the upper part of the outer barrel 101 and are positioned below the oil scraping plate 3, a sleeve 104 which is coaxial with the inner barrel 103 is arranged in the inner barrel 103, the upper end of the sleeve 104 is closed and is positioned above the inner barrel 103, the lower end of the sleeve 104 is fixedly connected with the lower end surface of the outer barrel 101, through holes are respectively arranged on the side walls of the sleeve 104 at the left side and the right side of the partition board 4, and the through holes are close to the upper part of the sleeve 104; the sewage to be filtered firstly enters the space between the outer barrel 101 and the middle barrel 102 from the water inlet and gradually flows into the space between the middle barrel 102 and the inner barrel 103, the oil gradually floats upwards due to low density of the oil in the flowing process, the density of the water is greatly positioned below, the upper end of the inner barrel 103 is closed, the heavier water enters the area on the right side of the partition plate 4 from the lower end of the inner barrel 103 through the through hole sleeve 104, the oil floating above the water is blocked in the area on the left side of the partition plate 4 close to the upper side, and similarly, the water flowing into the area on the right side of the partition plate 4 flows into the space between the outer barrel 101 and the middle barrel 102 from the lower end of the inner barrel 103 and is discharged from the liquid outlet, and the oil positioned above is blocked by the upper end of the middle barrel 102 and is remained in the area on the right side of the partition plate 4 close to the upper side.

In order to realize that when the oil scraping plate 3 rotates in a reciprocating manner, the oil above the oil separation tank 1 can enter the oil filtering unit 2, the liquid channel 8 comprises a through groove along the front-back direction of the partition plate 4, the tail end of the through groove is communicated with the oil filtering unit 2, through holes perpendicular to the through groove are respectively arranged on the left side wall and the right side wall of the through groove, a plurality of through holes are arranged along the front and back of the partition plate 4, a one-way valve is arranged in each through hole, a baffle plate 10 is arranged in the oil separation tank 1, the baffle plate 10 is positioned above the through holes, the outer end surface of the baffle plate 10 is tightly attached to the inner end surface of the outer barrel 101, the lower end surface of the oil scraping plate 3 is positioned below the upper end surface of the inner barrel 103, the outer end of the oil scraping plate 3 is attached to the inner wall of the outer barrel 101, and a avoiding groove 11 is arranged at a position close to the upper end surface of the inner barrel 103, the avoidance groove 11 can ensure that the inner barrel 103 does not interfere the rotation of the oil scraping plate 3, the upper end surface of the oil scraping plate 3 is attached to the baffle 10, the avoidance groove 11 is arranged at the position close to the oil filtering unit 2, and the avoidance groove 11 ensures that the oil filtering unit 2 does not interfere the rotation of the oil scraping plate 3; the rotating shaft 9 is positioned in the sleeve 104 and is coaxial with the sleeve 201, and the lower end of the rotating shaft 9 penetrates through the outer barrel 101 and is connected with the water-stop sheet 7; the rotating shaft 9 is connected with the water stop sheet 7 through a non-self-locking thread, and the length of the thread is such that when the water stop sheet 7 moves downwards from the beginning to the lowest end of the displacement of the water stop sheet 7, the rotating shaft 9 drives the oil scraping plate 3 to rotate for a half cycle; when the water-stop sheet 7 is located at the lowest end of the displacement, the oil scraping plate 3 on the right side of the partition plate 4 is located when the water-stop sheet 7 moves downwards, the rotating shaft 9 is driven to rotate, the rotating shaft 9 drives the oil scraping plate 3 to rotate together, and due to the blocking of the baffle plate 10 and the partition plate 4 above, the rotation of the oil scraping plate 3 can increase the pressure on one side of the oil scraping plate, which is the same as the rotating direction, so that the oil scraping plate 3 scrapes oil to enable the oil to enter the oil filtering unit 2 through the liquid channel 8.

The oil filtering unit 2 comprises a sleeve 201, the sleeve 201 is coaxial with the oil separation pool 1, a through hole 204 communicated with the inner cavity of the sleeve 201 is formed at the joint of the sleeve 201 and the partition plate 4, the through hole 204 is close to the lower side of the sleeve 201, an annular groove 202 is formed in the sleeve 201, the annular groove 202 is close to the lower side of the sleeve 201 and is positioned above the baffle plate 10, an oil separating film 203 is installed in the annular groove 202, an oil filtering barrel 205 is sleeved in the sleeve 201, a gap is formed between the oil filtering barrel 205 and the sleeve 201, a gap is formed between the upper end of the oil filtering barrel 205 and the sleeve 201, a gap 206 is formed in the upper end surface of the oil filtering barrel 205, and the gap 206 is close to the right side of the sleeve 201; when the oil scraping plate 3 rotates and oil above the oil filter sump is scraped into the space between the sleeve 201 and the oil filter drum 205, the oil floats above the oil due to the fact that the density of water is greater than that of the oil, and the substance in the oil filter sump 1 enters the sleeve 201 from the lower portion of the sleeve 201, so that when the sleeve 201 and the oil filter drum 205 are full of the substance, the oil precipitated at the upper layer enters the oil filter drum 205, and the water flows out from the oil separation film 203 below the oil filter drum.

A transmission shaft 16 which is coaxial with the oil filtering barrel 205 is arranged in the oil filtering barrel 205, the lower end of the transmission shaft 16 penetrates through the sleeve 201 and is positioned below the sleeve 201, the transmission shaft 16 is connected with the rotating shaft 9 through a one-way clutch, the rotating shaft 9 rotates to drive the transmission shaft 16 to rotate in a one-way manner, a plurality of push plates 17 which are radial along the transmission shaft 16 are uniformly distributed on the circumference of the transmission shaft 16, the outer end surface of each push plate 17 is attached to the inner wall of the oil filtering barrel 205, the push plates 17 equally divide the interior of the oil filtering barrel 205 into a plurality of spaces, a supporting barrel 19 which is coaxial with the oil filtering barrel 205 is arranged at the lower end of the oil filtering barrel 205, a supporting plate 20 is arranged at the upper end surface of the supporting barrel 19, a vertical L-shaped plate 21 is arranged in the supporting barrel 19, and the supporting barrel 19 is divided into two independent chambers by the L-shaped plate 21, oil ports are formed in the bottom surfaces of the supporting plate 20 and the oil filtering barrel 205 in the acute angle region corresponding to the L-shaped plate 21, fan-shaped grooves 22 are formed in the bottom surfaces of the supporting plate 20 and the oil filtering barrel 205 in the obtuse angle region corresponding to the L-shaped plate 21, oil separating films 203 are installed on the fan-shaped grooves 22, a through hole is formed in the lower end face of the sleeve 201 in the acute angle region corresponding to the L-shaped plate 21, a check valve is installed on the through hole, an oil pipe rotatably connected with the rotating shaft 9 is installed in the acute angle region corresponding to the L-shaped plate 21, an oil channel 23 coaxial with the rotating shaft 9 is formed in the rotating shaft 9, and an outlet at the lower end of the oil channel 23 is located in the oil storage tank 6; every time the oil content that flows into in the sleeve 201 all can flow into a space that push pedal 17 formed, and moisture flows out from oil removal membrane 203, when water-stop sheet 7 moves down, can drive transmission shaft 16 through pivot 9 and rotate an angle, transmission shaft 16 can drive push pedal 17 and rotate jointly when rotating, push pedal 17 rotates the oil content that drives two adjacent regions and shifts, after water-stop sheet 7 descends several processes, push pedal 17 can drive the oil content of a period of stewing and flow into the acute angle region that L template 21 constitutes and flow into oil storage tank 6 through fluid passageway 23 from the through-hole in, moisture can flow into the obtuse angle region that L template 21 formed, and flow into through the check valve in oil interceptor 1.

The position cover that the transmission shaft 16 lower extreme is located in supporting bucket 19 be equipped with a adapter sleeve 24, adapter sleeve 24 cavity, the position that transmission shaft 16 is in adapter sleeve 24 set up to be a diameter less than the connecting axle 25 of transmission shaft 16, connecting axle 25 and adapter sleeve 24 between have the interval, fluid passageway 23 with adapter sleeve 24 and connecting axle 25 between the interval communicate with each other.

In order to realize that after the water stop sheet 7 moves downwards, the water in the cavity above the water stop sheet 7 can be discharged, the water stop sheet 7 is provided with a water outlet hole 701, a plugging device capable of moving up and down is arranged on the water outlet hole 701, the plugging device comprises a plugging plate 702 which is arranged in the water outlet hole 701 and can move up and down, the water outlet hole 701 is plugged when the plugging plate 702 is positioned in the water outlet hole 701, the lower part of the plugging plate 702 is connected with a horizontal connecting plate 703 through a vertical rod, the connecting plate 703 is provided with a through hole which vertically penetrates through the connecting plate 703, the connecting plate 703 is connected with the water stop sheet 7 through a spring, the lower end surface of the water collecting tank 5 is provided with a water outlet pipeline, the lower end surface of the water collecting tank 5 is provided with a vertical ejector rod 705, an overload device is arranged between the water stop sheet 7 and the water collecting tank 5, when the water stop sheet 7 moves downwards to the lowest end of the displacement, the water-stop plate 7 is fixed by the overload device, meanwhile, the ejector rod 705 pushes the connecting plate 703 to move upwards, meanwhile, the plugging plate 702 moves upwards to open the water outlet hole 701, water above the water-stop plate 7 flows out through the water outlet hole 701, and after water flow above the water-stop plate 7 is completed, the spring on the elastic plate drives the water-stop plate 7 to break through the overload and move upwards to reset.

In order to realize when water-stop sheet 7 moves down its displacement lower extreme, the position of the fixed water-stop sheet 7 of fixing device, water-stop sheet 7 including installing dowel 14 on the lateral wall of water-stop sheet 7, dowel 14 can water-stop sheet 7 on horizontal migration, locating pin and water-stop sheet 7 between install the spring, the lateral wall of catch basin 5 on offer with dowel 14 complex positioning groove 15, when water-stop sheet 7 moves down its displacement lower extreme, dowel 14 be located positioning groove 15, water-stop sheet 7's position is fixed.

When the device is used:

sewage enters the box body from an oil inlet of the oil separation tank 1, sewage to be filtered firstly enters a space between the outer barrel 101 and the middle barrel 102 from the water inlet and gradually flows into a space between the middle barrel 102 and the inner barrel 103, the sewage gradually floats upwards due to low oil density in the flowing process, the water density is greatly positioned below, the upper end of the inner barrel 103 is closed, heavy water enters the area on the right side of the partition plate 4 from the lower end of the inner barrel 103 through the through hole sleeve 201, the oil floating above the water is blocked in the area on the left side close to the upper part of the partition plate 4, and similarly, the water flowing into the area on the right side of the partition plate 4 flows into the space between the outer barrel 101 and the middle barrel 102 from the lower end of the inner barrel 103 and is discharged from the liquid outlet, and the oil above is blocked by the upper end of the middle barrel 102 and is left in the area on the right side close to the upper part of the partition plate 4;

the treated water flows into the water collecting tank 5 from the water outlet and drives the water-stop sheet 7 to move downwards, and the water-stop sheet 7 moves downwards;

when the water stop sheet 7 is located at the uppermost end of the displacement, the oil scraping plate 3 on the right side of the partition plate 4 is close to the baffle 10 on the front side, when the water stop sheet 7 moves downwards, the rotating shaft 9 is driven to rotate, the rotating shaft 9 drives the oil scraping plate 3 to rotate together, due to the blocking of the baffle 10 and the partition plate 4 above, the rotation of the oil scraping plate 3 can increase the pressure on one side in the same direction of rotation, and therefore the oil scraping plate 3 scrapes oil so that the oil enters the interval between the sleeve 201 and the oil filtering barrel 205 through the liquid channel 8.

Because the density of water is greater than that of oil, oil can float above, and because the substance in the oil separation tank 1 enters the sleeve 201 from the lower part of the sleeve 201, when the sleeve 201 and the oil filter barrel 205 are full of substances, the oil precipitated at the upper layer enters the oil filter barrel 205, and the water can flow out from the oil separation film 203 below.

When the water-stop sheet 7 moves downwards to the lowest end of the displacement, the water-stop sheet 7 is fixed by the overload device, the ejector rod 705 pushes the connecting plate 703 to move upwards, the plugging plate 702 moves upwards to open the water outlet hole 701, water above the water-stop sheet 7 flows out through the water outlet hole 701, and after the water above the water-stop sheet 7 is completely flowed, the spring on the elastic plate drives the water-stop sheet 7 to break through the overload to move upwards for resetting;

the filtered water continuously passes through the water collecting tank 5 and drives the water-stop sheet 7 to move up and down in such a reciprocating way, so that the oil scraping plate 3 rotates in a reciprocating way, and the upper-layer oil is extruded into the oil filtering unit 2; from this, at oil-water separation's in-process, the upper oil content is scraped to the play water content control frizing 3 interval through sewage treatment for in the oil content enters into oil strain unit 2, can in time clear away the oil content on upper strata oil interceptor 1, prevent that the oil content is too much to influence the filter effect.

More and more oil in the sleeve 201 and the oil-separating barrel are gathered, water is contained in the oil after the oil enters the oil filtering unit 2, but the oil floats to the upper layer due to low density of the oil, the water flows out through the oil-separating membrane 203, and the inlet of the sleeve 201 is close to the lower part, so that when the oil in the sleeve 201 is higher than that in the oil filtering barrel 205, the last time of oil enters the outer barrel 101, the last time of oil enters the lower part, the oil layer above gradually overflows into the oil filtering barrel 205, and the oil accumulated for multiple times can be ensured to enter the oil filtering barrel 205 every time of overflow; therefore, in the process of oil-water separation, the oil scraping plate 3 is controlled by the water outlet amount of sewage treatment to scrape the upper oil component intermittently, so that the oil component enters the oil filtering unit 2, and the upper oil component can be removed out of the oil separation tank 1 in time; the control method does not need to consider the arrangement of the oil outlet position, does not stop when scraping oil, and can improve the efficiency.

When the height of the oil in the sleeve 201 is the same as the uppermost end of the oil filter barrel 205, the oil scraping plate 3 can make the uppermost oil in the outer barrel 101 enter the oil filter barrel 205 by moving each time, even if part of the water entering the oil filter barrel 205 flows out from the oil separating film 203, and the oil flowing into the sleeve 201 flows into a space formed by the push plate 17 each time, and the water flows out from the oil separating film 203, when the water-stop plate 7 moves downwards, the transmission shaft 16 is driven by the rotating shaft 9 to rotate for an angle, the transmission shaft 16 drives the push plate 17 to rotate together when rotating, the push plate 17 rotates to drive the oil in two adjacent areas to be transferred, when the water-stop plate 7 descends for several processes, the push plate 17 drives the oil standing for a period to flow into an acute angle area formed by the L-shaped plates 21 from the through holes and flow into the oil storage tank 6 through the oil channel 23, and the water flows into an obtuse angle area formed by the L-shaped plates 21, and flows into the oil separation tank 1 through a one-way valve; therefore, no matter how much oil is, the oil layer above can be ensured to gradually overflow into the oil filter barrel 205, the oil which is accumulated for many times can be ensured to enter into the oil filter barrel 205 every time of overflow, and the moisture contained in the oil can be reduced as much as possible.

Claims

1. An oil-water automatic separation device for sewage treatment is characterized by comprising an oil separation tank (1), an oil filtering unit (2), an oil scraping plate (3), a partition plate (4), a water collecting tank (5) and an oil storage tank (6), wherein the oil filtering unit (2) is positioned in the oil separation tank (1) and is close to the upper part, the partition plate (4) is positioned in the middle of the oil separation tank (1) and is placed in the front-back direction, the oil separation tank (1) is divided into two parts which are bilaterally symmetrical by the partition plate (4), liquid channels (8) which are used for communicating the oil separation tank (1) with the oil filtering unit (2) are respectively arranged on the left end surface and the right end surface of the partition plate (4), the water collecting tank (5) is positioned below the oil separation tank (1), a water baffle plate (7) which can move up and down is arranged in the water collecting tank (5), and the water baffle plate (7) divides the water collecting tank (5) into an upper independent chamber and a lower independent chamber, the oil filter is characterized in that a water outlet of the oil separation tank (1) is communicated with a cavity above the water-stop plate (7) through a pipeline, the oil storage tank (6) is positioned in the cavity above the oil-stop plate and is communicated with the oil filtering unit (2) through an oil pipe, the oil-stop plate (3) is arranged in the oil separation tank (1) in a left-right mode, one oil-stop plate is arranged in the oil separation tank (1), the oil-stop plate (3) is close to the lower portion of the oil filtering unit (2), the oil-stop plate (3) is in threaded connection with the water-stop plate (7) below through a rotating shaft (9), the water-stop plate (7) can drive the oil-stop plate (3) to rotate in a reciprocating mode, oil on the upper layer of the oil separation tank (1) is scraped into the oil filtering unit (2) when the oil-stop plate (3) rotates, and the oil is discharged into the oil storage tank (6) after being precipitated for a certain time through the oil filtering unit (2).

2. The automatic oil-water separation device for sewage treatment according to claim 1, wherein the oil separation tank (1) comprises an outer barrel (101), a middle barrel (102) and an inner barrel (103) which are coaxial, the outer barrel (101), the middle barrel (102) and the inner barrel (103) are spaced, the upper end and the lower end of the outer barrel (101) are closed, the upper end and the lower end of the middle barrel (102) are open, the upper end and the lower end of the middle barrel (102) are spaced from the upper end and the lower end of the outer barrel (101), the inner barrel (103) is open downwards, the lower wall of the inner barrel (103) is positioned below the lower end of the middle barrel (102), the upper end of the inner barrel (103) is closed and positioned below the upper end of the middle barrel (102), and the axis of the partition plate (4) is coaxial with the axis of the outer barrel (101), the two ends of the clapboard (4) are fixed on the inner wall of the outer barrel (101), the middle barrel (102) and the inner barrel (103) are divided into two parts which are symmetrical left and right by the clapboard (4), a water inlet and a water outlet are respectively arranged on the side walls of the outer barrel (101) at the left side and the right side of the clapboard (4), the water inlet and the water outlet are both close to the upper part of the outer barrel (101) and are positioned below the oil scraping plate (3), a sleeve (104) which is coaxial with the inner barrel (103) is arranged in the inner barrel (103), the upper end of the sleeve (104) is closed and is positioned above the inner barrel (103), the lower end of the sleeve (104) is fixedly connected with the lower end surface of the outer barrel (101), through holes are formed in the side walls of the sleeves (104) on the left side and the right side of the partition plate (4), and the through holes are close to the upper portions of the sleeves (104).

3. The automatic oil-water separation device for sewage treatment according to claim 2, wherein the liquid channel (8) comprises a through groove along the front-back direction of the partition board (4), the end of the through groove is communicated with the oil filtering unit (2), through holes perpendicular to the through groove are formed in the left and right side walls of the through groove, a plurality of through holes are arranged along the front-back direction of the partition board (4), a one-way valve is installed in each through hole, a baffle (10) is installed in the oil separating tank (1), the baffle (10) is located above the through holes, the outer end surface of the baffle (10) is closely attached to the inner end surface of the outer barrel (101), the lower end surface of the oil scraping plate (3) is located below the upper end surface of the inner barrel (103), and the outer end of the oil scraping plate (3) is attached to the inner wall of the outer barrel (101), an avoiding groove (11) is formed in the position close to the upper end face of the inner barrel (103), the inner barrel (103) can not interfere with the rotation of the oil scraping plate (3) due to the avoiding groove (11), the upper end face of the oil scraping plate (3) is attached to the baffle (10), the avoiding groove (11) is formed in the position close to the oil filtering unit (2), and the oil filtering unit (2) cannot interfere with the rotation of the oil scraping plate (3) due to the avoiding groove (11); the rotating shaft (9) is positioned in the sleeve (104) and is coaxial with the sleeve (201), and the lower end of the rotating shaft (9) penetrates through the outer barrel (101) and is connected with the water-stop plate (7); the oil scraper is characterized in that the rotating shaft (9) is connected with the water stop plate (7) through non-self-locking threads, the thread length meets the requirement that when the water stop plate (7) moves downwards to the lowest end of the displacement of the water stop plate (7) from the beginning, the rotating shaft (9) drives the oil scraper (3) to rotate for a half cycle.

4. The automatic oil-water separation device for sewage treatment according to claim 1, wherein the oil filtering unit (2) comprises a sleeve (201), the sleeve (201) is coaxial with the oil separation tank (1), a connection part of the sleeve (201) and the partition plate (4) is provided with a through hole (204) communicated with an inner cavity of the sleeve (201), the through hole (204) is close to the lower side of the sleeve (201), the sleeve (201) is provided with an annular groove (202), the annular groove (202) is close to the lower side of the sleeve (201) and is positioned above the baffle plate (10), an oil separation film (203) is arranged in the annular groove (202), an oil filtering barrel (205) is sleeved in the sleeve (201), and a gap is formed between the oil filtering barrel (205) and the sleeve (201), the upper end of straining oil drum (205) with sleeve (201) between have the interval, strain oil drum (205) up end on seted up a breach (206), breach (206) be close to the right side of sleeve (201).

5. The automatic oil-water separation device for sewage treatment according to claim 4, wherein a transmission shaft (16) coaxial with the oil filter barrel (205) is installed in the oil filter barrel (205), the lower end of the transmission shaft (16) penetrates through the sleeve (201) and is located below the sleeve (201), the transmission shaft (16) is connected with the rotating shaft (9) through a one-way clutch, the rotating shaft (9) rotates to drive the transmission shaft (16) to rotate in a one-way manner, a plurality of push plates (17) radial along the transmission shaft (16) are evenly distributed on the circumference of the transmission shaft (16), the outer end surface of each push plate (17) is attached to the inner wall of the oil filter barrel (205), the push plates (17) evenly divide the inside of the oil filter barrel (205) into a plurality of spaces, and a support barrel (19) coaxial with the oil filter barrel (205) is installed at the lower end of the oil filter barrel (205), a supporting plate (20) is installed on the upper end face of the supporting barrel (19), a vertical L-shaped plate (21) is installed in the supporting barrel (19), the supporting barrel (19) is divided into two independent chambers by the L-shaped plate (21), oil ports are formed in the bottom faces of the supporting plate (20) and the oil filtering barrel (205) of an acute angle region corresponding to the L-shaped plate (21), fan-shaped grooves (22) are formed in the bottom faces of the supporting plate (20) and the oil filtering barrel (205) of an obtuse angle region corresponding to the L-shaped plate (21), an oil separating film (203) is installed on each fan-shaped groove (22), a through hole is formed in the lower end face of a sleeve (201) of an acute angle region corresponding to the L-shaped plate (21), a check valve is installed on each through hole, an oil pipe rotatably connected with the rotating shaft (9) is installed in the acute angle region corresponding to the L-shaped plate (21), and an oil channel (23) coaxial with the rotating shaft (9) is formed in the rotating shaft (9), and an outlet at the lower end of the oil channel (23) is positioned in the oil storage tank (6).

6. The automatic oil-water separation device for sewage treatment according to claim 4, wherein a connecting sleeve (24) is sleeved at a position of the lower end of the transmission shaft (16) in the supporting barrel (19), the connecting sleeve (24) is hollow, a connecting shaft (25) with a diameter smaller than that of the transmission shaft (16) is arranged at a position of the transmission shaft (16) in the connecting sleeve (24), a gap is formed between the connecting shaft (25) and the connecting sleeve (24), and the oil passage (23) is communicated with the gap between the connecting sleeve (24) and the connecting shaft (25).

7. The automatic oil-water separation device for sewage treatment according to claim 1, wherein the water-stop plate (7) is provided with a water outlet hole (701), the water outlet hole (701) is provided with a plugging device capable of moving up and down, the plugging device comprises a plugging plate (702) which is arranged in the water outlet hole (701) and capable of moving up and down, the water outlet hole (701) is plugged when the plugging plate (702) is positioned in the water outlet hole (701), the lower part of the plugging plate (702) is connected with a horizontal connecting plate (703) through a vertical rod, the connecting plate (703) is provided with a through hole which penetrates the connecting plate (703) up and down, the connecting plate (703) is connected with the water-stop plate (7) through a spring, the lower end surface of the water collecting tank (5) is provided with a water outlet pipeline, the lower end surface of the water collecting tank (5) is provided with a vertical push rod (705), and an overload device is arranged between the water-stop sheet (7) and the water collecting tank (5).

8. The automatic oil-water separation device for sewage treatment according to claim 1, wherein the water-stop plate (7) comprises a positioning pin (14) installed on a side wall of the water-stop plate (7), the positioning pin (14) can horizontally move on the water-stop plate (7), a spring is installed between the positioning pin and the water-stop plate (7), and a positioning groove (15) matched with the positioning pin (14) is formed on a side wall of the water collection tank (5).