CN111589596A

CN111589596A - Hydraulic cyclone device

Info

Publication number: CN111589596A
Application number: CN202010401644.7A
Authority: CN
Inventors: 李晓明; 李光
Original assignee: Jutal Offshore Oil Services Zhuhai Co ltd
Current assignee: Jutal Offshore Oil Services Zhuhai Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-08-28
Anticipated expiration: 2040-05-13
Also published as: CN111589596B

Abstract

The invention discloses a hydrocyclone device, relates to the field related to water-oil separation, and aims to solve the problems that a gravity separation method in the prior art requires large occupied space of equipment, can not continuously treat oily wastewater, and has low treatment efficiency on the oily wastewater. The cyclone main body comprises a middle cyclone cylinder, the middle cyclone cylinder is arranged to be of a hollow cylindrical structure, a cyclone inner cavity is arranged inside the middle cyclone cylinder, the cyclone inner cavity is divided into a left cavity and a right cavity, the left cavity is a cylindrical cavity, the right cavity is arranged to be in a semi-horn shape, the diameter of the right cavity is gradually reduced, the maximum diameter of the right cavity is the same as that of the left cavity, a cyclone piece is arranged inside the cyclone inner cavity, the cyclone piece comprises cyclone blades, the cyclone blades comprise a straight blade part and an inclined blade part, the straight blade part and the inclined blade part are arranged to be of an integrated structure, and the distances between the straight blade part and the inclined blade part and the inner wall of the middle cyclone cylinder are equal.

Description

Hydraulic cyclone device

Technical Field

The invention relates to the field related to water-oil separation, in particular to a hydraulic cyclone device.

Background

The oily wastewater mainly comprises oil field wastewater, wastewater of oil refineries and petrochemical plants, ballast water, tank washing water and cabin water of oil tankers, cleaning water of oil tankers and the like, and mainly exists in the forms of floating oil, dissolved oil and the like. With the development of industry, the discharge of oily wastewater is increasing day by day, the pollution to the environment is becoming more serious, mainly characterized in that oil substances float on the water surface to form a film, which can reduce the content of dissolved oxygen in the air in the water, so that plankton in the water body dies due to oxygen deficiency, and the photosynthesis of aquatic plants is also hindered, thereby affecting the self-purification of the water body, even leading the water body to become odorous, and destroying the utilization value of water resources. When the oily wastewater of boats and ships is handled and is discharged, need to guarantee that treatment facility effectively uses, reduce equipment because of stranded sewage direct discharge causes the risk of environment.

Because the mass proportion of water and oil is different, a gravity separation method can be adopted for separating the water and the oil, but the gravity separation method needs very large equipment to place the oily wastewater, and then separates the oily wastewater after standing and layering, the separation difficulty at the position of a connecting liquid level is large, and the next treatment can be carried out after single separation, so that the continuous treatment operation cannot be carried out, the treatment efficiency is low, and the treatment requirement of a large amount of oily wastewater cannot be met; therefore, the market urgently needs to develop a hydraulic cyclone device to help people to solve the existing problems.

Disclosure of Invention

The invention aims to provide a hydrocyclone device to solve the problems that the existing gravity separation method proposed in the background art needs large occupied space, cannot continuously treat oily wastewater and has low treatment efficiency on the oily wastewater.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a hydrocyclone device, includes the swirler main part, the swirler main part includes middle whirl section of thick bamboo, and middle whirl section of thick bamboo sets up to the hollow circular cylinder structure, the inside of middle whirl section of thick bamboo is provided with the whirl inner chamber, and the whirl inner chamber divide into left chamber and right chamber two parts, and left chamber is the cylinder cavity, and right chamber sets up to half loudspeaker form, and right chamber diameter reduces gradually, and the maximum diameter in right chamber is the same with left chamber diameter, the internally mounted of whirl inner chamber has whirl spare, whirl spare includes the whirl blade, the whirl blade comprises straight portion of blade and blade skew portion two parts, and straight portion of blade and blade skew portion set up to the integral structure, and the distance between straight portion of blade and blade skew portion and middle whirl section of thick bamboo inner wall is impartial, and the length in the straight portion of blade is the same with the length in left chamber, and the length in the.

Preferably, the whirl piece still includes intermediate junction axle, and intermediate junction axle is located the centre of the inside swirler main part, intermediate junction axle and whirl blade fixed connection, and the length of intermediate junction axle is greater than the length of whirl blade, be provided with the fretwork groove on the intermediate junction axle, and the fretwork groove is provided with the multiunit, multiunit the upper end in fretwork groove is provided with connecting portion, multiunit the middle-end in fretwork groove is provided with middle connecting portion, the multiunit the lower extreme in fretwork groove is provided with down connecting portion, the inside of intermediate junction axle is provided with the oil pocket, and the oil pocket runs through connecting portion, middle connecting portion and fretwork groove, and lower connecting portion are the sealing process.

Preferably, the swirler main body further comprises a left connecting disc and a right connecting disc, the left connecting disc is located on one side of the middle swirling cylinder, the right connecting disc is located on the other side of the middle swirling cylinder, and the left connecting disc, the middle swirling cylinder and the right connecting disc are fixed in an adjacent mode through welding.

Preferably, the right connecting disc is fixed with the middle connecting shaft through a first ball bearing, a plurality of water outlets are arranged on the right connecting disc along the outer side of the first ball bearing, and the plurality of water outlets are arranged in an annular array.

Preferably, one side that middle whirl section of thick bamboo was kept away from to right side connection pad is installed right side protection disc, and right side protection disc passes through connecting bolt with right side connection pad and fixes, one side that right side connection pad was kept away from to right side protection disc is provided with the buffer cylinder, and the inside of buffer cylinder is provided with the cushion chamber, buffer cylinder and right side protection disc fixed connection, the centre that buffer cylinder one side was kept away from to right side protection disc is provided with the inlet tube, and the inside diameter of inlet tube is less than the inside diameter of cushion chamber, and the inlet tube is fixed with right side connection pad, and the inlet tube is fixed with right side protection disc, one side that right side protection disc was kept away from.

Preferably, a left side protection disc is installed on one side, far away from the middle cyclone cylinder, of the left side connecting disc, and the left side protection disc and the left side connecting disc are fixed through a connecting bolt.

Preferably, be provided with the oil pipe between left side protection disc and the left side connection pad, the oil pipe sets up to "L" type structure, and the outside and the left side connection pad of oil pipe pass through the clamping fixed, and the one end and the left side connection pad fixed connection of oil pipe, oil pipe and intermediate junction axle pass through the second ball bearing and are connected, and the inside diameter of oil pipe is greater than the inside diameter of intermediate junction axle.

Preferably, one side of the outer portion of the middle rotational flow cylinder is fixedly connected with an oily sewage inlet pipe, one end of the oily sewage inlet pipe extends to the inner portion of the rotational flow inner cavity, the oily sewage inlet pipes are arranged in a plurality, and the oily sewage inlet pipes are arranged in a radial mode.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, oily wastewater is treated by adopting a hydraulic cyclone mode, the oily wastewater is introduced through the oily wastewater inlet pipe, the oily wastewater can flap the cyclone piece when entering the cyclone cavity, the cyclone effect can be greatly enhanced under the action of the cyclone piece, the pressure loss is reduced, the oily wastewater rotates at a high speed in the cyclone cavity, water can be gathered at the outer side of the cyclone due to the difference of oil and water densities, the floating oil and the dispersed oil are in the center, the oil and the water are separated by utilizing the centrifugal force of the high-speed rotation and then flow out through the water outlet pipe and the water outlet pipe, so that the oily wastewater can be introduced into the oily wastewater inlet pipe all the time, the water and the oil are discharged respectively under the cyclone effect, the oily wastewater can be continuously treated by the whole equipment, the oily wastewater does not need to be introduced after one-time separation, and the treatment efficiency of the whole equipment is improved; because the equipment can continuously treat the oily wastewater, the device has small size and does not occupy too large space;

2. according to the invention, the rotational flow blade on the rotational flow member is composed of the blade straight part and the blade inclined part, oily wastewater enters the rotational flow cavity and is firstly flapped by a large margin, so that the rotational flow effect can be greatly enhanced, the pressure loss is reduced, the oily wastewater forms a vortex due to the structural design that the diameters of the blade inclined part and one side of the rotational flow cavity are contracted in the rotating process, water is gathered at the outer side of the rotational flow, floating oil and dispersed oil are in the center, so that the separation treatment is completed, the time for forming the vortex is shortened through the structural design of the rotational flow member, the formed vortex speed is higher, and the oily wastewater can be efficiently treated;

3. in the invention, the middle connecting shaft is provided with the plurality of hollow grooves, so that dispersed oil can enter the oil cavity, the upper connecting part, the middle connecting part and the connecting rings between the plurality of hollow grooves can well fix the rotational flow blades, the rotational flow blades and the middle connecting shaft have better fixing effect, the lower connecting part is subjected to sealing treatment, and the oil body is positioned at the middle position, so that the sealing treatment can prevent the oil body from reaching the circulation position of a water body through the middle connecting shaft, and the water and the oil are more fully separated;

4. according to the invention, the water inlet pipe and the buffer cylinder are additionally arranged, water is gathered at the outer side of the rotational flow and enters the water inlet pipe along the water outlet at the position of the right connecting disc, at the moment, no oil body exists in the water inlet pipe, the speed of the rotational flow is high, impact force is generated when the water is directly discharged into a water body, and the survival of animals and plants in the water body is not facilitated, so that the buffer cavity is arranged, the rotational flow loses a component for supporting the rotational flow, the inner diameter of the buffer cylinder is suddenly increased, the tendency of the rotational flow is slowed down, and the speed of water flow.

Drawings

FIG. 1 is an overall configuration of a hydrocyclone apparatus of the present invention;

FIG. 2 is a partial cross-sectional view of a hydrocyclone apparatus of the present invention;

FIG. 3 is an overall structural view of the swirling member of the present invention;

fig. 4 is an overall structural view of an intermediate connecting shaft of the present invention;

FIG. 5 is a front view of the right side interface disc of the present invention;

FIG. 6 is a view of the connection of the outlet pipe and the intermediate connecting shaft according to the present invention;

fig. 7 is an overall configuration diagram of the buffer tube of the present invention.

In the figure: 1. a left protective disk; 2. a swirler body; 3. a left connecting disc; 4. a middle cyclone cylinder; 5. a right side connecting disc; 6. a right side protection disc; 7. a buffer cylinder; 8. an oil outlet pipe; 9. an oily sewage inlet pipe; 10. a water outlet pipe; 11. a connecting bolt; 12. a rotational flow inner cavity; 13. a swirl member; 14. a middle connecting shaft; 15. a swirl vane; 16. a blade straight portion; 17. a blade bevel; 18. an upper connecting portion; 19. an intermediate connecting portion; 20. a lower connecting portion; 21. hollowing out the grooves; 22. an oil chamber; 23. a first ball bearing; 24. a water outlet; 25. a second ball bearing; 26. and (4) a water inlet pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-7, an embodiment of the present invention is shown: a hydraulic cyclone device comprises a cyclone main body 2, the cyclone main body 2 comprises a middle cyclone barrel 4, the middle cyclone barrel 4 is of a hollow cylindrical structure, a cyclone inner cavity 12 is arranged inside the middle cyclone barrel 4, the cyclone inner cavity 12 is divided into a left cavity and a right cavity, the left cavity is a cylindrical cavity, the right cavity is of a semi-horn shape, the diameter of the right cavity is gradually reduced, the maximum diameter of the right cavity is the same as that of the left cavity, a cyclone piece 13 is arranged inside the cyclone inner cavity 12, the cyclone piece 13 is located inside the cyclone inner cavity 12 and does not have the rotation capability per se, but water flow is pumped in under the action of a pressure pump to provide power for the rotation of the cyclone piece 13, the rotation of the cyclone piece 13 is used for reducing the loss of water flow pressure during entering, so that the water flow continues to rotate under the pumping pressure inside, the cyclone piece 13 rotates along with the action of the water flow pressure, the rotational action can also play a role in increasing the rotation of water flow and reduce the loss of water flow pressure when entering as much as possible, the middle of a plurality of prior swirlers is not designed related to the structure, the water flow can only rotate downwards through the pressure of the water flow, so the stroke of the vortex is longer and the length of equipment can be increased, or a part of the middle of the swirler is provided with a spiral channel, the water flow forms the vortex through a fixed spiral channel, but the mode has larger abrasion to the component, the pressure of the water flow entering is larger and directly impacts on the fixed swirling piece 13, the swirling piece 13 is easy to be broken easily, the swirling piece 13 comprises swirling vanes 15, the swirling vanes 15 are composed of two parts of straight vane parts 16 and inclined vane parts 17, the straight vane parts 16 and the inclined vane parts 17 are arranged into an integrated structure, the distances between the straight vane parts 16 and the inclined vane parts 17 and the inner wall of the middle swirling barrel 4 are equal, and a good condition for, the length of straight portion 16 of blade is the same with the length in left chamber, and straight portion 16 of blade rotates at left intracavity, through straight portion 16 of blade can increase area of contact when rivers get into to avoid pressure loss, the length of the oblique portion 17 of blade is the same with the length in right chamber.

Further, the rotational flow member 13 further comprises an intermediate connecting shaft 14, the intermediate connecting shaft 14 is located in the middle of the inside of the cyclone main body 2, the intermediate connecting shaft 14 is fixedly connected with the rotational flow blades 15, the length of the intermediate connecting shaft 14 is greater than that of the rotational flow blades 15, hollow grooves 21 are formed in the intermediate connecting shaft 14, a plurality of groups of hollow grooves 21 are formed, upper connecting portions 18 are arranged at the upper ends of the groups of hollow grooves 21, intermediate connecting portions 19 are arranged at the middle ends of the groups of hollow grooves 21, the upper end and the lower end of the inner side of each rotational flow blade 15 are respectively fixed on the upper connecting portions 18 and the intermediate connecting portions 19, the middle of the inner side of each rotational flow blade 15 is fixed on connecting portions among the groups of hollow grooves 21, the fixing capacity between the intermediate connecting shaft 14 and the rotational flow blades 15 is improved on the premise that water flow is not blocked, lower connecting portions 20 are, the oil chamber 22 penetrates through the upper connecting part 18, the middle connecting part 19 and the hollow groove 21, the lower connecting part 20 is sealed, and the oil body is located in the middle position, so that the oil body can be prevented from reaching the circulation position of the water body through the middle connecting shaft 14 through sealing treatment, and the water and the oil can be separated more fully.

Further, the swirler main body 2 further comprises a left connecting disc 3 and a right connecting disc 5, the left connecting disc 3 is located on one side of the middle swirler barrel 4, the right connecting disc 5 is located on the other side of the middle swirler barrel 4, and the left connecting disc 3, the middle swirler barrel 4 and the right connecting disc 5 are fixed through welding between the adjacent parts.

Further, the right connecting disc 5 is fixed with the middle connecting shaft 14 through a first ball bearing 23, the first ball bearing 23 is a waterproof and corrosion-resistant ball bearing, a water outlet 24 is formed in the right connecting disc 5 along the outer side of the first ball bearing 23, the water outlets 24 are multiple, and the multiple water outlets 24 are arrayed in an annular mode.

Further, a right side protection disc 6 is installed on one side of the right side connecting disc 5, which is far away from the middle rotational flow cylinder 4, the right side protection disc 6 and the right side connecting disc 5 are fixed through a connecting bolt 11, a buffer cylinder 7 is arranged on one side of the right side protection disc 6, which is far away from the right side connecting disc 5, a buffer cavity is arranged inside the buffer cylinder 7, the buffer cylinder 7 and the right side protection disc 6 are fixedly connected, a water inlet pipe 26 is arranged in the middle of one side of the right side protection disc 6, which is far away from the buffer cylinder 7, the inner diameter of the water inlet pipe 26 is smaller than that of the buffer cavity, the whole space is increased because the diameter of the buffer cylinder 7 is obviously larger than that of the water inlet pipe 26, and rotational flow loses a component supporting the rotational flow, so that the vortex trend is slowed down, the water speed is slowed down, water flow buffered by the buffer, and a water outlet pipe 10 is arranged on one side of the buffer cylinder 7, which is far away from the right protection disc 6, and the water outlet pipe 10 is fixed with the buffer cylinder 7.

Further, a left protection disc 1 is installed on one side, away from the middle cyclone cylinder 4, of the left connection disc 3, and the left protection disc 1 and the left connection disc 3 are fixed through a connection bolt 11.

Further, be provided with out oil pipe 8 between left side protection disc 1 and the left side connection pad 3, the setting of left side protection disc 1 is for protecting out oil pipe 8, it sets up to "L" type structure to go out oil pipe 8, it is fixed that the outside of going out oil pipe 8 passes through the clamping with left side connection pad 3, the one end and the left side connection pad 3 fixed connection of going out oil pipe 8, it is connected through second ball bearing 25 with intermediate junction axle 14 to go out oil pipe 8, second ball bearing 25 adopts waterproof corrosion resistant ball bearing, the inside diameter of going out oil pipe 8 is greater than the inside diameter of intermediate junction axle 14, consequently because the increase of diameter when the interior oil body of intermediate junction axle 14 gets into out oil pipe 8, its velocity of flow also can be reduced.

Further, pipe 9 is advanced to middle whirl section of thick bamboo 4 outside one side fixedly connected with oily sewage, oily sewage advances the inside that the one end of pipe 9 extends to whirl inner chamber 12, oily sewage advances pipe 9 and is provided with a plurality ofly, a plurality of oily sewage advance the radial setting of pipe 9, oily waste water advances pipe 9 and gets into from a plurality of oily sewage that middle whirl section of thick bamboo 4 periphery is radial distribution under pressure, a large amount of oily waste water directly pat the straight portion 16 of blade, thereby can strengthen the whirl effect greatly, and reduce loss of pressure.

The working principle is as follows: when the device is used, oily wastewater is introduced through the oil-containing wastewater inlet pipes 9 which are arranged in a radioactive manner, the oily wastewater enters the middle cyclone cylinder 4 from the oil-containing wastewater inlet pipes 9, when the oily wastewater enters the cyclone inner cavity 12, the oily wastewater firstly flares the straight blade parts 16 of the cyclone pieces 13 to a large extent, so that the cyclone effect can be greatly enhanced, and the pressure loss is reduced, the oily wastewater forms a vortex due to the structural design that the diameters of the inclined blade parts 17 and one side of the cyclone inner cavity 12 are contracted in the rotating process, water is gathered at the outer side of the cyclone, floating oil and dispersed oil are in the center, so that oil bodies enter the oil cavity 22 from the hollow groove 21 of the middle connecting shaft 14, the closed design at the lower connecting part 20 prevents the oil bodies from entering the water inlet pipe 26 through the middle connecting shaft 14, so that the wastewater entering the water inlet pipe 26 does not contain the oil bodies, the speed of the entering water vortex is high, for the unfavorable existence of animals and plants in the water, therefore rivers flow out from delivery port 24, enter the inside to buffer cylinder 7 through inlet tube 26 of connecting, because the diameter of buffer cylinder 7 is obviously greater than the diameter of inlet tube 26, whole space increases, and the whirl loses the component that supports its rotation, therefore the vortex trend is slowed down, and the water speed is slowed down, and the rivers after buffer cylinder 7 buffering are discharged through outlet pipe 10. The oil body entering the oil cavity 22 gradually moves upwards under the action of the rotational flow until reaching the top position of the intermediate connecting shaft 14 and enters the oil outlet pipe 8, and because the intermediate connecting shaft 14 and the oil outlet pipe 8 are fixed through the second ball bearing 25, the oil outlet pipe 8 is fixed with the left connecting disc 3, the oil body enters the oil outlet pipe 8 and loses the force supporting the rotation of the oil body, and flows out of the oil outlet pipe 8 through the inertia of the oil body.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A hydrocyclone installation comprising a cyclone main body (2), characterized in that: the cyclone main body (2) comprises a middle cyclone cylinder (4), the middle cyclone cylinder (4) is of a hollow cylindrical structure, a cyclone inner cavity (12) is arranged inside the middle cyclone cylinder (4), the cyclone inner cavity (12) is divided into a left cavity and a right cavity, the left cavity is a cylindrical cavity, the right cavity is of a semi-horn shape, the diameter of the right cavity is gradually reduced, the maximum diameter of the right cavity is the same as that of the left cavity, a cyclone piece (13) is arranged inside the cyclone inner cavity (12), the cyclone piece (13) comprises cyclone blades (15), each cyclone blade (15) is composed of a straight blade part (16) and an inclined blade part (17), the straight blade part (16) and the inclined blade part (17) are of an integrated structure, the distances between the straight blade part (16) and the inclined blade part (17) and the inner wall of the middle cyclone cylinder (4) are equal, and the length of the straight blade part (16) is the same as that of the left cavity, the length of the blade inclined part (17) is the same as that of the right cavity.

2. A hydrocyclone installation according to claim 1, wherein: the cyclone piece (13) also comprises an intermediate connecting shaft (14), the intermediate connecting shaft (14) is positioned in the middle of the inside of the cyclone main body (2), the intermediate connecting shaft (14) is fixedly connected with the cyclone blades (15), the length of the intermediate connecting shaft (14) is greater than that of the cyclone blades (15), the intermediate connecting shaft (14) is provided with a hollow groove (21), and a plurality of groups of hollow grooves (21) are arranged, the upper ends of a plurality of groups of hollow grooves (21) are provided with upper connecting parts (18), the middle ends of a plurality of groups of hollow grooves (21) are provided with middle connecting parts (19), the lower ends of a plurality of groups of hollow grooves (21) are provided with lower connecting parts (20), an oil cavity (22) is formed in the middle connecting shaft (14), the oil cavity (22) penetrates through the upper connecting portion (18), the middle connecting portion (19) and the hollow groove (21), and the lower connecting portion (20) is sealed.

3. A hydrocyclone installation according to claim 2, wherein: the cyclone main body (2) further comprises a left side connecting disc (3) and a right side connecting disc (5), the left side connecting disc (3) is located on one side of the middle cyclone cylinder (4), the right side connecting disc (5) is located on the other side of the middle cyclone cylinder (4), and the left side connecting disc (3), the middle cyclone cylinder (4) and the right side connecting disc (5) are fixed through welding between the left side connecting disc (3), the middle cyclone cylinder (4) and the right side connecting disc (5).

4. A hydrocyclone installation according to claim 3, wherein: the right connecting disc (5) is fixed with the middle connecting shaft (14) through a first ball bearing (23), a plurality of water outlets (24) are arranged on the right connecting disc (5) along the outer side of the first ball bearing (23), and the plurality of water outlets (24) are arrayed in an annular mode.

5. A hydrocyclone installation according to claim 4, wherein: one side of the right side connecting disc (5) far away from the middle cyclone cylinder (4) is provided with a right side protection disc (6), the right side protection disc (6) is fixed with the right side connecting disc (5) through a connecting bolt (11), one side of the right side protection disc (6) far away from the right side connecting disc (5) is provided with a buffer cylinder (7), the inside of the buffer cylinder (7) is provided with a buffer cavity, the buffer cylinder (7) is fixedly connected with the right side protection disc (6), the middle of one side of the right side protection disc (6) far away from the buffer cylinder (7) is provided with a water inlet pipe (26), the inner diameter of the water inlet pipe (26) is smaller than the inner diameter of the buffer cavity, the water inlet pipe (26) is fixed with the right side connecting disc (5), the water inlet pipe (26) is fixed with the right side protection disc (6), one side of the buffer cylinder (, the water outlet pipe (10) is fixed with the buffer cylinder (7).

6. A hydrocyclone installation according to claim 3, wherein: and a left side protection disc (1) is installed on one side, far away from the middle cyclone cylinder (4), of the left side connecting disc (3), and the left side protection disc (1) is fixed with the left side connecting disc (3) through a connecting bolt (11).

7. A hydrocyclone installation according to claim 6, wherein: be provided with between left side protection disc (1) and the left side connection pad (3) and go out oil pipe (8), go out oil pipe (8) and set up to "L" type structure, the outside and the left side connection pad (3) of going out oil pipe (8) are fixed through the clamping, the one end and the left side connection pad (3) fixed connection of going out oil pipe (8), go out oil pipe (8) and intermediate junction axle (14) are connected through second ball bearing (25), the inside diameter that goes out oil pipe (8) is greater than the inside diameter of intermediate junction axle (14).

8. A hydrocyclone installation according to claim 1, wherein: the middle cyclone cylinder (4) is fixedly connected with oily sewage on one side of the outer portion into a pipe (9), one end of the oily sewage into the pipe (9) extends to the inner portion of the cyclone inner cavity (12), the oily sewage into the pipe (9) is provided with a plurality of pipes, and the oily sewage into the pipes (9) are radially arranged.