Negative pressure steam floating oil-water separator

Abstract

The utility model relates to the technical field of oil-water separation equipment, in particular to a negative-pressure steam-floating oil-water separator which comprises a separation cavity, a vacuum pump, a liquid adding port, an oil scraping mechanism, an oil discharging port and a water discharging pipe, the oil scraping mechanism comprises an oil scraping plate obliquely arranged in the separation cavity, an oil scraping disc rotationally installed below the oil scraping plate through a rotating shaft and a rotating driving piece, the lower end of the oil scraping plate abuts against the inner side wall of the separation cavity, the oil discharge outlet is formed in the side wall, close to the lower end of the oil scraping plate, of the separation cavity, an oil scraping hole which contains the upper portion of the oil scraping disc and extends to the position above the oil scraping plate is formed in the oil scraping plate in a penetrating mode, and the width of the lower end, away from the oil scraping plate, of the oil scraping hole is larger than that of the oil scraping disc. The width of the lower end, close to the oil scraping plate, of the oil scraping hole is matched with the thickness of the oil scraping disc, the rotary driving piece drives the oil scraping disc to rotate to scrape off grease floating above mixed liquid, then the oil scraping disc moves relative to the oil scraping hole in the oil scraping plate, grease adhering to the oil scraping disc can be scraped off and stored, and the separation effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil water separation equipment technical field, concretely is a kind of negative pressure floatation oil water separator. BACKGROUND

[0002] Machine tool cutting field utilizes oil water separation machine to separate used cutting fluid mixture, removes cutting fluid surface oil, to prevent cutting fluid from being contaminated by oil, and further prolong the service life of cutting fluid, so that cutting fluid can be repeatedly used, reduce production cost.Negative pressure floatation oil water separator is a kind of equipment using negative pressure (vacuum) environment and micro-bubble floatation principle to separate oil and water, system creates negative pressure (lower than atmospheric pressure) in closed container, reduces water gas solubility, promotes dissolved gas to form micro-bubble, and the micro-bubble (or external injection gas) attached to oil droplet surface, reduces oil droplet density, makes it quickly float to liquid surface and form oil layer, and oil is discharged by slagging device or overflow, and clean water flows from bottom, to realize separation.

[0003] In prior art, oil is scraped off from liquid surface by setting oil scraping disc, and then oil is sent out by conveying plate, for example, a kind of vacuum oil water separator disclosed in Chinese patent document, application number 201611271532.4, on the one hand, oil is easy to adhere to oil scraping disc, and rotating oil scraping disc can bring oil back into mixture, on the other hand, when oil scraping disc is higher than liquid surface, it can also cause failure to work, and separation effect is poor. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of negative pressure floatation oil water separator to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of negative pressure floatation oil water separator, including separation cavity, for the vacuum pump of being extracted into negative pressure inside separation cavity, liquid inlet for liquid addition inside separation cavity, oil scraping mechanism, oil outlet and drain pipe, the oil scraping mechanism includes the oil scraping plate of being obliquely arranged inside separation cavity, the oil scraping disc of being rotatably installed below oil scraping plate by rotating shaft and the rotating drive member of driving rotating shaft rotation, the lower end of oil scraping plate is abutted on the inside wall of separation cavity, for storing oil, the oil outlet is arranged on the side wall of separation cavity close to the lower end of oil scraping plate, the oil scraping hole that oil scraping plate is throughly provided with is included in the extension to the upper side of oil scraping plate on the upper portion of oil scraping disc, the width of oil scraping hole away from the lower end of oil scraping plate is greater than the width of oil scraping disc, and the width of oil scraping hole close to the lower end of oil scraping plate is adapted to the thickness of oil scraping disc, for scraping off the oil adhered to the side wall of oil scraping disc.

[0006] Furthermore, a top cover is detachably installed on the top of the separation chamber, and a mounting part is vertically extended from the edge of the top of the separation chamber, the mounting part being fixedly connected to the top cover by bolts.

[0007] Furthermore, both sides of the scraper are vertically provided with support plates, and the top of each support plate extends to the top of the separation chamber and is bent to provide a support plate. The support plate is located between the top cover and the mounting part, and the support plate is provided with mounting holes for fixing to the top cover and the mounting part.

[0008] Furthermore, the number of oil scraping discs is set to multiple, and several oil scraping discs are fixed on the rotating shaft, with each oil scraping hole corresponding to one of the oil scraping discs.

[0009] Furthermore, a movable partition is provided inside the separation chamber via a linear drive component, which is used to push the movable partition to slide up and down inside the separation chamber. The movable partition is located below the oil scraper and divides the separation chamber into upper and lower cavities. The drain pipe is fixed to the bottom end of the movable partition, and a through hole adapted to the drain pipe is provided through the movable partition. The bottom end of the drain pipe extends to the outside of the separation chamber and is equipped with a valve.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] (1) The negative pressure steam flotation oil-water separator is equipped with an oil scraper, an oil scraper disc, a rotating shaft and a rotary drive. The rotary drive drives the oil scraper disc to rotate and scrape off the grease floating on the top of the mixture. The oil scraper disc is provided with oil scraping holes. When the top of the oil scraper disc rotates to the top of the oil scraper disc, it moves relative to the oil scraping holes, which can scrape off and store the grease adhering to the oil scraper disc, resulting in a good separation effect.

[0012] (2) By setting a movable baffle and a linear drive at the bottom of the separation chamber, the linear drive pushes the movable baffle to move up and down inside the separation chamber. The liquid level can be adjusted according to the amount of mixture, so that the bottom of the oil scraper is always below the liquid level, thus avoiding the inability to scrape oil when there is little mixture. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 3 This is an exploded view of the present invention;

[0016] Figure 4 This is a three-dimensional structural diagram of the oil scraping mechanism of this utility model;

[0017] In the figure: 1, separation cavity; 101, mounting portion; 2, vacuum pump; 3, liquid inlet; 4, oil scraping mechanism; 401, oil scraping plate; 4011, oil scraping hole; 4012, support vertical plate; 4013, support horizontal plate; 402, oil scraping disc; 403, rotating shaft; 404, rotating driving part; 5, oil outlet; 6, drain pipe; 7, movable partition plate; 8, linear driving part; 9, top cover. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. In the description of the utility model, it should be explained that the description of terms "first", "second" and the like is only for the purpose of description and does not mean to particularly indicate the order or sequence and is not used to limit the utility model. It is only to distinguish the components or operations described by the same technical terms and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the specification and claims of the utility model and the above drawings, the term "comprising" and any variations thereof are intended to cover the non-exclusive inclusion.

[0019] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "setting" should be understood in a broad sense. For example, it can be fixed connection or detachable connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, in the description of the utility model, it should be understood that the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation of the utility model.

[0020] Please refer to Figures 1-4The utility model provides an embodiment: a kind of negative pressure float oil-water separator, including separation cavity 1, for the vacuum pump 2 of being extracted into negative pressure inside separation cavity 1, liquid inlet 3 to the liquid addition inside separation cavity 1, oil scraping mechanism 4, oil outlet 5 and drain pipe 6, specifically, detachably installed with top cover 9 at the top end of separation cavity 1, top cover 9 covers in the top end of separation cavity 1, make the inside of separation cavity 1 form closed cavity, the edge of the top end of separation cavity 1 is vertically extended and is provided with mounting portion 101, mounting hole is provided at the edge of both sides of top cover 9 in mounting portion 101, mounting portion 101 is fixedly connected with top cover 9 by bolt, it is convenient to disassemble and wash and maintain inside, vacuum pump 2 is installed at the top end of top cover 9, and it is communicated with inside separation cavity 1, for the inside separation cavity 1 is extracted into negative pressure, accelerates inside oil drop to float.

[0021] Oil scraping mechanism 4 includes obliquely arranged oil scraping plate 401 in the inside of separation cavity 1, oil scraping disc 402 rotatably installed below oil scraping plate 401 by rotating shaft 403 and rotation driving part 404 for driving rotating shaft 403 to rotate, the lower end of oil scraping plate 401 is abutted on the inner side wall of separation cavity 1, for storing grease, oil outlet 5 is arranged on the side wall of separation cavity 1 close to the lower end of oil scraping plate 401, in the embodiment, the higher end of oil scraping plate 401 and the inner side wall of separation cavity 1 are reserved with gap, liquid inlet 3 is installed on the side of the top end of top cover 9 close to the gap, mixed liquid can be directly added into the inside of separation cavity 1 by liquid inlet 3, oil scraping hole 4011 that oil scraping disc 402 upper portion extends to the above of oil scraping plate 401 is provided on oil scraping plate 401, the width of oil scraping hole 4011 away from the lower end of oil scraping plate 401 is greater than the width of oil scraping disc 402, and the width of oil scraping hole 4011 close to the lower end of oil scraping plate 401 is adapted to the thickness of oil scraping disc 402, for scraping the grease adhered on the side wall of oil scraping disc 402, after oil scraping disc 402 is immersed in mixed liquid below liquid level and adheres oil, it is rotated to the above of oil scraping plate 401 by the wider end of oil scraping hole 4011, then is contacted with the narrower end of oil scraping hole 4011, and the grease adhered on oil scraping disc 402 is scraped, and the scraped oil drops under the action of gravity and slides to the lower end of oil scraping plate 401, and finally is discharged through oil outlet 5.

[0022] In the embodiment, rotating shaft 403 is rotatably installed on the opposite two side walls of separation cavity 1, and one end of rotating shaft 403 extends to the outside of separation cavity 1, and rotation driving part 404 is specifically motor, is installed on the outer side wall of separation cavity 1, and is fixedly connected with rotating shaft 403, the number of oil scraping disc 402 is provided with two, and can also be set to other quantities according to needs, and the two oil scraping discs 402 are fixed on rotating shaft 403, oil scraping hole 4011 corresponds to oil scraping disc 402 one by one, and the two oil scraping discs 402 work simultaneously, improve the oil scraping rate.

[0023] In this embodiment, the two sides of the oil scraping plate 401 are vertically provided with support vertical plates 4012, and the top ends of the support vertical plates 4012 extend above the separation cavity 1 and are bent to be provided with support horizontal plates 4013, which are located between the top cover 9 and the mounting portion 101, and the support horizontal plates 4013 are provided with mounting holes fixed with the top cover 9 and the mounting portion 101. When assembling, the top cover 9 is removed, the oil scraping plate 401 is inserted into the inside of the separation cavity 1, and then the top cover 9 is closed. The top cover 9, the support horizontal plate 4013 and the mounting portion 101 are fixed by bolts passing through the through holes, which is convenient for cleaning or replacing the oil scraping plate 401 when it is worn out, and is also convenient for maintaining and replacing other parts.

[0024] In this embodiment, the inside of the separation cavity 1 is provided with a movable partition plate 7 by a linear drive 8, and the linear drive 8 is used to push the movable partition plate 7 to slide up and down in the inside of the separation cavity 1. The bottom end of the separation cavity 1 is fixed with support legs at four corners. The linear drive 8 is specifically two electric push rods mounted at the bottom end of the separation cavity 1, and can also be provided as a pneumatic cylinder, a hydraulic telescopic rod, etc. The output end of the linear drive 8 extends into the inside of the separation cavity 1 and is fixedly connected with the bottom end of the movable partition plate 7. The linear drive 8 drives the movable partition plate 7 to move up and down in the inside of the separation cavity 1 through expansion and contraction. The movable partition plate 7 is located below the oil scraping disc 402, and the movable partition plate 7 divides the inside of the separation cavity 1 into two cavities in upper and lower positions. The mixed liquid is stored in the chamber above the movable partition plate 7. The liquid level can be adjusted by the expansion and contraction of the linear drive 8, so that the bottom end of the oil scraping disc 402 is always below the liquid level. Further, a sealing ring is arranged on the contact surface between the movable partition plate 7 and the separation cavity 1 to improve the sealing performance. The drain pipe 6 is fixed to the bottom end of the movable partition plate 7, and a through hole matched with the drain pipe 6 is arranged through the movable partition plate 7. The bottom end of the drain pipe 6 extends to the outside of the separation cavity 1 and is provided with a valve, so that the separated water can be discharged downward.

[0025] Working principle: The oil-water mixture is added into the inside of the separation cavity 1 through the liquid inlet 3. The inside of the separation cavity 1 is in a negative pressure state by the vacuum pump 2 to accelerate the floating of oil droplets. The rotating drive 404 drives the rotating shaft 403 to rotate, and then drives the two oil scraping discs 402 to rotate at the same time. The bottom end of the oil scraping disc 402 is immersed below the liquid level, and then rotates upward after adhering oil. When the oil scraping disc 402 rotates to the oil scraping hole 4011, the adhered oil is scraped off and falls to the lower end of the oil scraping plate 401. The collected oil can be discharged through the oil outlet 5, the separated water can be discharged through the drain pipe 6, and the mixed liquid can be pushed to move up and down in the inside of the separation cavity 1 by the linear drive 8 to push the movable partition plate 7 to move up and down in the inside of the separation cavity 1, so that the bottom end of the oil scraping disc 402 is always below the liquid level, which is convenient for scraping oil.

[0026] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A negative pressure gas-float oil-water separator comprising a separation chamber (1), a vacuum pump (2) for drawing the inside of the separation chamber (1) into negative pressure, a liquid inlet (3) for adding liquid into the inside of the separation chamber (1), an oil scraping mechanism (4), an oil outlet (5) and a water outlet pipe (6), characterized in that: The oil scraping mechanism (4) comprises an oil scraping plate (401) obliquely arranged inside the separation cavity (1), an oil scraping disc (402) rotatably arranged below the oil scraping plate (401) through a rotating shaft (403), and a rotary driving member (404) for driving the rotating shaft (403) to rotate, the lower end of the oil scraping plate (401) abuts against the inner side wall of the separation cavity (1) and is used for storing oil, the oil discharge port (5) is arranged on the side wall of the separation cavity (1) close to the lower end of the oil scraping plate (401), the oil scraping hole (4011) is arranged through the oil scraping plate (401) and is used for accommodating the upper part of the oil scraping disc (402) extending above the oil scraping plate (401), the width of the oil scraping hole (4011) away from the lower end of the oil scraping plate (401) is greater than the width of the oil scraping disc (402), and the width of the oil scraping hole (4011) close to the lower end of the oil scraping plate (401) is matched with the thickness of the oil scraping disc (402), so as to scrape off the oil adhering to the side wall of the oil scraping disc (402).

2. A negative pressure gas-float oil-water separator according to claim 1, characterized in that: The top end of the separation cavity (1) is detachably provided with a top cover (9), and the edge of the top end of the separation cavity (1) is vertically and extendingly provided with a mounting portion (101), and the mounting portion (101) is fixedly connected with the top cover (9) through bolts.

3. A negative pressure gas-float oil-water separator according to claim 2, characterized in that: The two sides of the oil scraping plate (401) are vertically provided with support vertical plates (4012), and the top ends of the support vertical plates (4012) extend above the separation cavity (1) and are bent to be provided with support horizontal plates (4013), the support horizontal plates (4013) are located between the top cover (9) and the mounting portion (101), and the support horizontal plates (4013) are provided with mounting holes fixed with the top cover (9) and the mounting portion (101).

4. A negative pressure gas-float oil-water separator according to claim 1, characterized in that: The number of the oil scraping discs (402) is plural, and the oil scraping discs (402) are fixed on the rotating shaft (403), and the oil scraping hole (4011) corresponds to the oil scraping disc (402) one by one.

5. A negative pressure gas-float oil-water separator according to claim 1, characterized in that: The inside of the separation cavity (1) is provided with a movable partition plate (7) through a linear driving member (8), the linear driving member (8) is used for pushing the movable partition plate (7) to slide up and down in the separation cavity (1), the movable partition plate (7) is located below the oil scraping disc (402), and the movable partition plate (7) divides the inside of the separation cavity (1) into two cavities, the drain pipe (6) is fixed at the bottom end of the movable partition plate (7), the movable partition plate (7) is provided with a through hole matched with the drain pipe (6), the bottom end of the drain pipe (6) extends to the outside of the separation cavity (1) and is provided with a valve.

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