CN220143693U - Vertical centrifugal separator with open auxiliary feeding structure - Google Patents

Abstract

The utility model provides a vertical centrifugal separator with an open auxiliary feeding structure, which comprises a spiral pusher core body and a rotary drum, wherein the spiral pusher core body is positioned in the rotary drum, and a fixed box body is arranged outside the rotary drum; the outer wall of the spiral pusher core is provided with a spiral blade, the spiral blade is positioned in a cavity between the spiral pusher core and the rotary drum, the top of the rotary drum is provided with a rotary drum liquid outlet, the side wall of the bottom of the rotary drum is provided with a rotary drum slag outlet, and the position of the box body close to the rotary drum slag outlet is provided with a slag discharging structure; the spiral pusher core and the rotary drum rotate at different speeds; the top of the rotary drum is provided with a rotary drum liquid outlet; the outer wall of the box body is provided with a box body liquid outlet which is connected with a liquid outlet pipe; the bottom of the spiral pusher core body is provided with a liquid lifting pipe which is connected with the expansion cavity, and the bottom of the liquid lifting pipe is provided with a spiral lifting device. Compared with the traditional slurry pump, the utility model has less abrasion of the blade and convenient replacement.

Description

Vertical centrifugal separator with open auxiliary feeding structure

Technical Field

The utility model relates to the technical field of drilling fluid separation, in particular to a vertical centrifugal separator with an open auxiliary feeding structure.

Background

The existing drilling fluid solid-liquid separation system generally comprises 3 vibrating screens, a vacuum deaerator, a desander, a desilter, a low-speed centrifugal machine, a high-speed centrifugal machine and a plurality of sand pumps, the purchase, maintenance and transportation costs of equipment are high, the occupied space is large, the difficulty of a solid control system is increased, the occupied area of the whole equipment is large, the automation control difficulty is high, and the energy consumption is large. The vertical three-phase combined centrifugal separator of the Chinese patent document CN203380009U adopts a liquid feeding structure, the structure mainly depends on the speed difference of the rotary drum and the spiral pusher to realize a better solid-liquid separation effect, but the structure adopts a structure for driving the rotary drum and the spiral pusher to rotate from the top and the bottom respectively, so that the requirement on sealing is high, and the bearing is easy to damage. Moreover, by adopting a top liquid supply mode, the working condition is difficult to accurately control. CN104399601a describes a centrifugal separation device in which a gear box is described which drives the drum and the screw, respectively, to rotate at different speeds. However, in this structure, a pipeline pressure feeding mode is adopted, an independent slurry pump needs to be arranged, and drilling fluid containing drill cuttings can cause damage to the slurry pump quickly, and the damaged slurry pump needs to be shut down for maintenance.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a vertical centrifugal separator with an open auxiliary feeding structure, which can reduce the damage probability of the feeding structure, maintain or improve the liquid feeding efficiency and simplify the feeding structure.

In order to solve the technical problems, the utility model adopts the following technical scheme: a vertical centrifugal separator with an open auxiliary feeding structure comprises a spiral pusher core body and a rotary drum, wherein the spiral pusher core body is positioned in the rotary drum, and a fixed box body is arranged outside the rotary drum;

the spiral pusher core is of a hollow structure, the bottom of the spiral pusher core is of an inverted cone shape, a liquid outlet of the spiral pusher core is formed in the side wall of the top of the spiral pusher core, spiral blades are arranged on the outer wall of the spiral pusher core and positioned in a cavity between the spiral pusher core and the rotary drum, a rotary drum liquid outlet is formed in the top of the rotary drum, a rotary drum slag outlet is formed in the side wall of the bottom of the rotary drum, and a slag discharging structure is arranged at a position, close to the rotary drum slag outlet, of the box body;

the spiral pusher core and the rotary drum rotate at different speeds;

the top of the rotary drum is provided with a rotary drum liquid outlet;

the outer wall of the box body is provided with a box body liquid outlet which is connected with a liquid outlet pipe;

the bottom of the spiral pusher core body is provided with a liquid lifting pipe which is connected with the bottom of the spiral pusher core body;

the bottom of the lift tube is provided with a spiral lifting device.

In the preferred scheme, a differential mechanism is arranged at the top of the box body, the differential mechanism is of a two-stage planetary gear structure, a first-stage sun gear is in meshed connection with a first-stage planet gear, and the first-stage planet gear is in meshed connection with the inner teeth of the shell;

the first planetary gear carrier of the first planetary gear is connected with the second sun gear, the second sun gear is meshed with the second planetary gear, and the second planetary gear is meshed with the inner teeth of the shell;

the casing of differential mechanism is connected with main drive arrangement, and the casing bottom of differential mechanism is connected with the rotary drum, and the second grade planet carrier of second grade planet wheel is connected with differential mechanism output shaft, and differential mechanism output shaft is connected with spiral pusher core.

In the preferred scheme, a differential mechanism input shaft fixing bracket is fixedly arranged at the top of the box body, the differential mechanism is connected with the differential mechanism input shaft fixing bracket through a main bearing, the top of the differential mechanism input shaft fixing bracket extends to the top of the differential mechanism, and a speed regulation driving device is arranged on the differential mechanism input shaft fixing bracket;

the first-stage sun gear is connected with the speed regulation driving device through a second input shaft.

In the preferred scheme, be close to the position of box leakage fluid dram, be equipped with annular collecting tank on the box, the box leakage fluid dram is located annular collecting tank's outer wall position, and the top of rotary drum is connected with the top of flowing back pump blade, and flowing back pump blade is a plurality of, and flowing back pump blade is located annular collecting tank.

In the preferred scheme, a box body slag discharging groove is arranged at a position of the box body close to a rotary drum slag discharging opening, and a spiral slag discharging device which is horizontally arranged is arranged below the box body slag discharging groove;

in the spiral slag discharging device, a slag discharging spiral is rotatably arranged in a slag discharging spiral shell, and the length of the slag discharging spiral is shorter than the length (N) of a horizontal section of the slag discharging spiral shell at a position close to a slag discharging port of the whole machine, so that a slag discharging congestion section is formed at the slag discharging port of the whole machine;

or/and the outlet of the complete machine slag discharging port of the slag discharging spiral shell is inclined upwards, so that a slag discharging congestion section is formed at the complete machine slag discharging port.

In the preferred scheme, a rotatable slag conveying disc is arranged at a position close to a slag discharging port of the rotary drum, and the slag conveying disc is used for conveying slag to a slag discharging groove of the box body;

a slag baffle is arranged at the slag discharge groove of the box body and is used for leading slag to enter the slag discharge spiral shell;

a slag conveying disc driving motor is arranged on the box body, a slag conveying disc driving gear is arranged in the box body and connected with the slag conveying disc driving motor, a slag conveying disc driven gear is arranged on the slag conveying disc and connected with the slag conveying disc, and the slag conveying disc driven gear is meshed with the slag conveying disc driving gear;

or, a plurality of permanent magnets are arranged at the edge of the slag conveying disc, and a plurality of electromagnets are arranged on the outer wall of the box body so as to drive the slag conveying disc to rotate.

In the preferred scheme, the spiral lifting device is provided with a diameter-expanding shell, the top of the diameter-expanding shell is connected with a liquid lifting pipe, the bottom of the diameter-expanding shell is open, and lifting spiral blades are arranged on the inner wall of the diameter-expanding shell;

the lifting screw blade extends beyond the bottom of the expanded shell to form an extending screw blade.

In the preferred scheme, a conical cap is arranged in the middle of the diameter-expanding shell, and a liquid inlet channel is formed between the outer wall of the conical cap and the inner wall of the diameter-expanding shell.

In the preferred scheme, the box body extends downwards to be connected with a lift tube sleeve, the lift tube sleeve is sleeved outside the lift tube, and a power sealing mechanism is arranged between the lift tube sleeve and the lift tube;

the structure of the power sealing mechanism is as follows: the power seal upper cover and the power seal lower cover are fixedly connected with the inner wall of the liquid lifting pipe sleeve, a groove body is arranged between the power seal upper cover and the power seal lower cover, the power seal impeller is fixedly connected with the outer wall of the liquid lifting pipe, and the power seal impeller is positioned in the groove body;

the top of the power seal impeller is provided with a raised rib, and the top of the inner side of the power seal lower cover is provided with a raised rib for limiting unidirectional flow of liquid.

In the preferred scheme, an auxiliary liquid inlet spiral blade is arranged on the outer wall of the liquid lifting tube, the edge of the auxiliary liquid inlet spiral blade is close to the inner wall of the liquid lifting tube sleeve, the bottom of the liquid lifting tube is closed, and a plurality of liquid inlet through holes for liquid inlet are formed in the side wall of the liquid lifting tube at the position above the liquid inlet spiral blade;

the edge of the liquid inlet spiral blade is provided with a plurality of gap eliminating blocks, and the gap eliminating blocks are in sliding contact with the inner wall of the liquid lifting pipe sleeve;

the sum of the areas of the liquid inlet through holes is larger than the flow area of the liquid lifting pipe.

The vertical centrifugal separator with the open auxiliary feeding structure has the following beneficial effects by adopting the structure:

1. the utility model can greatly simplify the existing drilling fluid solid-liquid separation system, one device can finish the work which can be finished by a vacuum deaerator, a desander, a low-speed centrifugal machine and 3 sand pumps for supplying liquid to the devices, and can be provided with 1 vibrating screen, so that the prior 8 devices can be replaced by 1 device, and the energy consumption can be greatly reduced.

2. The treatment effect is stable: compared with the mud separating structure of the cyclone, the mud treatment is not influenced by drill cuttings, is not influenced by mud viscosity, pump pressure and blockage of a discharge port, and has very stable treatment effect.

3. The spiral lifting device that sets up combines the structure of feed liquor case, compares with traditional sediment stuff pump, because adopts open structure, and the wearing and tearing of blade are less, and it is also very convenient to change.

4. The combination of the arranged liquid discharge pump blade and the spiral lifting device can generate negative pressure at the position of the annular liquid collecting tank, so that the feeding efficiency is improved.

5. The spiral slag discharging device can reduce the pressure in the rotary drum through a congestion slag discharging mode, even can enable the rotary drum to form negative pressure, and improves the mud separating effect.

6. The water content of the stone slag is lower, a filter press can be omitted in the solid control system, the slurry separation efficiency of the whole solid control system is further improved, the cost is reduced, and the occupied area of equipment is reduced.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

fig. 1 is a cross-sectional view of the overall structure of the present utility model.

Fig. 2 is a cross-sectional view A-A of fig. 1.

Fig. 3 is a sectional view of B-B in fig. 1.

Fig. 4 is a schematic structural view of the differential of the present utility model.

Fig. 5 is a cross-sectional view of the overall structure of another preferred structure of the present utility model.

Fig. 6 is a cross-sectional view of the overall structure of another preferred structure of the present utility model.

In the figure: the main drive 1, main motor housing 2, main motor pulley 3, drive belt 4, case seal 5, differential connection disk 6, main bearing lower seal 7, main bearing 8, differential 9, second input shaft 901, primary sun gear 902, primary planet 903, primary planet carrier 904, input pulley 905, secondary planet 906, housing inner teeth 907, secondary planet carrier 908, secondary sun gear 909, first output shaft 910, second output shaft 911, main bearing upper seal 10, main bearing housing 11, differential input shaft fixing support 12, differential output shaft 13, case upper cover 14, drum upper shaft disk 15, liquid discharge pump vane 16, case 17, auger core 18, auger vane 19, auger lower seal 20, auger lower end bearing 21, drum 22, slag plate 23, auger lower seal 24, case lower cover 25, a slag discharge screw housing 26, a power seal upper cover 27, a power seal impeller 28, a power seal lower cover 29, a liquid lifting tube sleeve 30, a liquid lifting tube 31, a liquid discharge tube 32, a power seal mounting seat 33, a slag conveying disc driving motor 34, a slag conveying disc driven gear 35, a slag conveying disc driving gear 36, a slag conveying disc 37, a screw pusher big end bearing 38, a screw pusher big end seal 39, a slag discharge screw 40, a slag discharge screw motor 41, an auxiliary liquid feed screw blade 42, a slag removing block 43, an expanding cavity 44, a liquid feed tank 45, a speed regulation driving device 46, an annular liquid collecting tank 47, a screw lifting device 48, an expanding housing 481, a lifting screw blade 482, a centrifugal baffle 483, a conical cap 484, an extending screw blade 485, a tank bottom seal 49, an electromagnet 50, a permanent magnet 51, a tank liquid discharge port C, a pusher core liquid discharge port D, a slag discharge port E, a tank slag discharge groove F, a complete machine slag discharge port G, the liquid outlet H, the liquid inlet I, the extraction opening J, the rotary drum liquid outlet K, the length M of the slag discharging spiral, the length N of the horizontal section, the liquid inlet column height H1 and the liquid outlet column height H2.

Detailed Description

Example 1:

as shown in fig. 1, a vertical centrifugal separator with an open auxiliary feeding structure comprises a spiral pusher core 18 and a rotary drum 22, wherein the spiral pusher core 18 is positioned in the rotary drum 22, and a fixed box 17 is arranged outside the rotary drum 22;

the spiral pusher core 18 is of a hollow structure, an expansion cavity 44 is formed at the top of the spiral pusher core 18, the bottom of the expansion cavity 44 is in an inverted cone shape, a spiral pusher core liquid outlet D is formed in the side wall of the top of the expansion cavity 44, a spiral blade 19 is arranged on the outer wall of the spiral pusher core 18, the spiral blade 19 is positioned in a cavity between the spiral pusher core 18 and the rotary drum 22, a rotary drum liquid outlet K is formed in the top of the rotary drum 22, a rotary drum slag outlet E is formed in the side wall of the bottom of the rotary drum 22, and a slag discharging structure is arranged at a position, close to the rotary drum slag outlet E, of the box 17;

the auger core 18 and the drum 22 rotate at different speeds;

the top of the rotary drum 22 is provided with a rotary drum liquid outlet K;

a tank liquid outlet C is arranged on the outer wall of the tank 17 and is connected with a liquid outlet pipe 32;

the bottom of the spiral pusher core 18 is provided with a liquid lifting pipe 31, and the liquid lifting pipe 31 is connected with an expansion cavity 44;

a rotatable screw lift 48 is provided at the bottom of the lift tube 31. With this structure, the spiral lifting device 48 is driven to rotate by the rotation of the lift pipe 31, thereby realizing open auxiliary liquid feeding, and reducing energy consumption and equipment abrasion compared with a slurry pump which is independently arranged.

Example 2:

as shown in fig. 6, the spiral lifting device 48 is provided with a diameter-expanding shell 481, the top of the diameter-expanding shell 481 is connected with the liquid lifting tube 31, the bottom of the diameter-expanding shell 481 is open, and the inner wall of the diameter-expanding shell 481 is provided with lifting spiral blades 482;

the lifting screw blade 482 extends beyond the bottom of the enlarged diameter housing 481 to form an extending screw blade 485. With this configuration, the liquid can be introduced more favorably, and negative pressure can be prevented from being generated at the bottom opening position of the enlarged diameter casing 481.

As shown in fig. 6, a tapered cap 484 is provided in the middle of the diameter-enlarged housing 481, and a liquid inlet passage is formed between the outer wall of the tapered cap 484 and the inner wall of the diameter-enlarged housing 481. Through the test, the cone cap 484 can effectively promote the efficiency of feed liquor, promotes to 220m3/h from 180m 3/h. By analysis, the configuration of the cone cap 484 effectively blocks some of the turbulence returning from the central region and directs the turbulence to the lifting screw 482, thereby improving the liquid intake efficiency.

As shown in fig. 6, a centrifugal baffle 483 is provided on the outer periphery of the enlarged diameter housing 481 to block the centrifugal vortex formed by the rotation of the enlarged diameter housing 481 and to improve the efficiency of the liquid entering the bottom opening of the enlarged diameter housing 481.

Example 3:

in the preferred scheme, as shown in fig. 1 and 5, the box 17 extends downwards to be connected with a lift tube sleeve 30, the lift tube sleeve 30 is sleeved outside a lift tube 31, and a power sealing mechanism is arranged between the lift tube sleeve 30 and the lift tube 31;

the structure of the power sealing mechanism is as follows: the power seal upper cover 27 and the power seal lower cover 29 are fixedly connected with the inner wall of the lift tube sleeve 30, a groove body is arranged between the power seal upper cover 27 and the power seal lower cover 29, the power seal impeller 28 is fixedly connected with the outer wall of the lift tube 31, and the power seal impeller 28 is positioned in the groove body;

the top of the dynamic seal impeller 28 is provided with raised ribs and the inside top of the dynamic seal lower cover 29 is provided with raised ribs for restricting the unidirectional flow of liquid. The rotation of the lift tube 31 drives the rotation of the dynamic seal impeller 28, and the dynamic seal mechanism forms negative pressure in the tank 17 to some extent.

In the preferred scheme, as shown in fig. 1 and 5, an auxiliary liquid inlet helical blade 42 is arranged on the outer wall of a liquid lifting tube 31, the edge of the auxiliary liquid inlet helical blade 42 is close to the inner wall of a liquid lifting tube sleeve 30, the bottom of the liquid lifting tube 31 is closed, and a plurality of liquid inlet through holes 53 for liquid inlet are arranged on the side wall of the liquid lifting tube 31 at the position above the liquid inlet helical blade 42; the sum of the areas of the plurality of intake through holes 53 is larger than the flow area of the lift tube 31. When the lift tube 31 rotates the auxiliary liquid feeding screw blade 42, the auxiliary liquid feeding screw blade 42 lifts the liquid and feeds the liquid from the through hole 53.

In a preferred scheme, a plurality of gap eliminating blocks 43 are arranged at the edge of the liquid inlet spiral blade 42, and the gap eliminating blocks 43 are in sliding contact with the inner wall of the lift tube sleeve 30; the anti-backlash block 43 is preferably made of polytetrafluoroethylene.

Example 4:

in the preferred schemes as shown in fig. 1, 5 and 6, a differential mechanism 9 is arranged at the top of a box body 17, the differential mechanism 9 is of a two-stage planetary gear structure, a first-stage sun gear 902 is in meshed connection with a first-stage planet gear 903, and the first-stage planet gear 903 is in meshed connection with an inner tooth 907 of a shell;

the primary planet carrier 904 of the primary planet 903 is connected with the secondary sun gear 909, the secondary sun gear 909 is in meshed connection with the secondary planet 906, and the secondary planet 906 is in meshed connection with the internal tooth 907 of the shell;

the housing of the differential mechanism 9 is connected with the main driving device 1, the bottom of the housing of the differential mechanism 9 is connected with the rotary drum 22 through a first output shaft 910, and the first output shaft 910 is a connecting structure fixedly connected with the housing of the differential mechanism 9; the secondary planet carrier 908 of the secondary planet 906 is connected to a differential output shaft 911, and the differential output shaft 911 is connected to the screw pusher core 18.

In the preferred scheme, as shown in fig. 5 and 6, a differential input shaft fixing bracket 12 is fixedly arranged at the top of a box body 17, a differential 9 is connected with the differential input shaft fixing bracket 12 through a main bearing 8, the top of the differential input shaft fixing bracket 12 extends to the top of the differential 9, and a speed regulation driving device 46 is arranged on the differential input shaft fixing bracket 12;

the primary sun gear 902 is connected to the variable speed drive 46 via a second input shaft 901.

Example 5:

in the preferred embodiments, as shown in fig. 1, 5 and 6, an annular liquid collecting tank 47 is arranged on the tank 17 at a position close to a liquid outlet C of the tank, the liquid outlet C of the tank is positioned at the outer wall of the annular liquid collecting tank 47, the top of the rotary drum 22 is connected with the top of the liquid discharging pump blades 16, the number of the liquid discharging pump blades 16 is multiple, and the liquid discharging pump blades 16 are positioned in the annular liquid collecting tank 47. With this configuration, the rotation of the drain pump blade 16 promotes the drain, and the rotation speed of the drum 22 is adjustable, so that negative pressure is generated in the drum 22 by the centrifugal drain.

Example 6:

in the preferred scheme, as shown in fig. 1-3, a box slag discharging groove F is arranged at a position of the box 17 close to a rotary drum slag discharging opening E, and a spiral slag discharging device which is horizontally arranged is arranged below the box slag discharging groove F;

in the spiral slag discharging device, a slag discharging spiral 40 is rotatably arranged in a slag discharging spiral shell 26, and the length M of the slag discharging spiral is shorter than the length (N) of a horizontal section of the slag discharging spiral shell 26 at a position close to a slag discharging port G of the whole machine, so that a slag discharging congestion section is formed at the slag discharging port G of the whole machine;

alternatively/and, the outlet of the complete machine slag discharging port G of the slag discharging spiral shell 26 is inclined upwards so that a slag discharging congestion section is formed at the complete machine slag discharging port G. The structure of the slag-off jamming section is provided, so that air can be prevented from entering the rotary drum 22 from the slag-off jamming section.

In the preferred scheme, as shown in fig. 1-3, a rotatable slag conveying disc 37 is arranged at a position close to a slag discharging port E of the rotary drum, and the slag conveying disc 37 is used for conveying slag to a slag discharging groove F of the box body;

a slag baffle plate 23 is arranged at the position of the slag discharging groove F of the box body, and the slag baffle plate 23 is used for leading slag to enter the slag discharging spiral shell 26;

a slag conveying disc driving motor 34 is arranged on the box body 17, a slag conveying disc driving gear 36 is arranged in the box body 17, the slag conveying disc driving gear 36 is connected with the slag conveying disc driving motor 34, a slag conveying disc driven gear 35 is arranged on the slag conveying disc 37, the slag conveying disc driven gear 35 is connected with the slag conveying disc 37, and the slag conveying disc driven gear 35 is meshed with the slag conveying disc driving gear 36; with the structure, the slag discharging efficiency is improved, and the deposition of the stone slag at the bottom of the box body 17 is avoided.

In comparison with the slag pan driving motor 34, or as an alternative, as shown in fig. 5, a plurality of permanent magnets 51 are provided at the edge of the slag pan 37, and a plurality of electromagnets 50 are provided at the outer wall of the case 17 to drive the slag pan 37 to rotate. With the structure, the influence of stone slag on a transmission mechanism is avoided, and the service life of the slag conveying disc is greatly prolonged.

Example 7:

as shown in fig. 1, the top of the box 17 is provided with an air extraction opening J, and the air extraction opening J is used for connecting an air extraction device so as to make the cavity between the spiral pusher core 18 and the rotary drum 22 be negative pressure; with this structure, the suction port J is connected to the negative pressure device, so that negative pressure is formed in the drum 22 and the expansion chamber 44, and mud can be sucked from the lift pipe 31, enter the expansion chamber 44, enter the inner cavity of the drum 22 from the discharge port D of the spiral pusher core, and be separated into sludge and auxiliary exhaust. The gas is discharged from the extraction opening J, the slurry supernatant is discharged from the drum liquid outlet K at the top of the drum 22, the slurry enters the liquid outlet pipe 32 through the box liquid outlet C, and the stone slag is discharged from the drum slag outlet E. This embodiment can be combined with the foregoing embodiment.

The above embodiments are only preferred embodiments of the present utility model, and should not be construed as limiting the present utility model, and the connection mentioned in the present utility model includes direct connection and indirect connection. It is difficult to enumerate the embodiments in whole, given the space. The embodiment and the technical characteristics in the embodiment can be combined with each other to form a new technical scheme at will under the condition of no conflict. The protection scope of the present utility model is defined by the claims, and the protection scope includes equivalent alternatives to the technical features of the claims. I.e., equivalent replacement modifications within the scope of this utility model are also within the scope of the utility model.

Claims (10)

1. A vertical centrifuge with an open auxiliary feed structure, characterized by: comprises a spiral pusher core body (18) and a rotary drum (22), wherein the spiral pusher core body (18) is positioned in the rotary drum (22), and a fixed box body (17) is arranged outside the rotary drum (22);

the spiral pusher core (18) is of a hollow structure, the bottom of the spiral pusher core (18) is of an inverted cone shape, a spiral pusher core liquid outlet (D) is formed in the side wall of the top of the spiral pusher core (18), a spiral blade (19) is arranged on the outer wall of the spiral pusher core (18), the spiral blade (19) is positioned in a cavity between the spiral pusher core (18) and the rotary drum (22), a rotary drum liquid outlet (K) is formed in the top of the rotary drum (22), a rotary drum slag outlet (E) is formed in the side wall of the bottom of the rotary drum (22), and a slag discharging structure is formed in the position, close to the rotary drum slag outlet (E), of the box (17);

the auger core (18) and the drum (22) rotate at different speeds;

a drum liquid outlet (K) is arranged at the top of the drum (22);

a box liquid outlet (C) is arranged on the outer wall of the box (17), and the box liquid outlet (C) is connected with a liquid discharge pipe (32);

a liquid lifting pipe (31) is arranged at the bottom of the spiral pusher core (18), and the liquid lifting pipe (31) is connected with the bottom of the spiral pusher core (18);

a spiral lifting device (48) is arranged at the bottom of the lift tube (31).

2. A vertical centrifugal separator with an open auxiliary feed structure according to claim 1, characterized in that: the top of the box body (17) is provided with a differential mechanism (9), the differential mechanism (9) is of a two-stage planetary gear structure, a first-stage sun wheel (902) is in meshed connection with a first-stage planet wheel (903), and the first-stage planet wheel (903) is in meshed connection with inner teeth (907) of the shell;

the first-stage planet carrier (904) of the first-stage planet wheel (903) is connected with the second-stage sun wheel (909), the second-stage sun wheel (909) is connected with the second-stage planet wheel (906) in a meshed manner, and the second-stage planet wheel (906) is connected with the inner teeth (907) of the shell in a meshed manner;

the casing of differential mechanism (9) is connected with main drive arrangement (1), and the casing bottom of differential mechanism (9) is connected with rotary drum (22), and second grade planet carrier (908) of second grade planet wheel (906) is connected with differential mechanism output shaft (911), and differential mechanism output shaft (911) is connected with spiral pusher core (18).

3. A vertical centrifugal separator with an open auxiliary feed structure according to claim 2, characterized in that: a differential mechanism input shaft fixing bracket (12) is fixedly arranged at the top of the box body (17), the differential mechanism (9) is connected with the differential mechanism input shaft fixing bracket (12) through a main bearing (8), the top of the differential mechanism input shaft fixing bracket (12) extends to the top of the differential mechanism (9), and a speed regulation driving device (46) is arranged on the differential mechanism input shaft fixing bracket (12);

the primary sun gear (902) is connected with the speed regulating driving device (46) through a second input shaft (901).

4. A vertical centrifugal separator with an open auxiliary feed structure according to claim 1, characterized in that: the liquid discharge device is characterized in that an annular liquid collecting groove (47) is formed in the box body (17) at a position close to a liquid discharge opening (C) of the box body, the liquid discharge opening (C) of the box body is located at the outer wall of the annular liquid collecting groove (47), the top of the rotary drum (22) is connected with the top of the liquid discharge pump blades (16), the number of the liquid discharge pump blades (16) is multiple, and the liquid discharge pump blades (16) are located in the annular liquid collecting groove (47).

5. A vertical centrifugal separator with an open auxiliary feed structure according to claim 1, characterized in that: a box body slag discharging groove (F) is arranged at the position of the box body (17) close to the rotary drum slag discharging opening (E), and a horizontally arranged spiral slag discharging device is arranged below the box body slag discharging groove (F);

in the spiral slag discharging device, a slag discharging spiral (40) is rotatably arranged in a slag discharging spiral shell (26), and the length (M) of the slag discharging spiral is shorter than the length (N) of a horizontal section of the slag discharging spiral shell (26) at a position close to a slag discharging port (G) of the whole machine, so that a slag discharging congestion section is formed at the slag discharging port (G) of the whole machine;

or/and the outlet of the whole machine slag discharging port (G) of the slag discharging spiral shell (26) is inclined upwards, so that a slag discharging congestion section is formed at the whole machine slag discharging port (G).

6. A vertical centrifugal separator with an open auxiliary feed structure according to claim 5, characterized in that: a rotatable slag conveying disc (37) is arranged at a position close to the slag discharging opening (E) of the rotary drum, and the slag conveying disc (37) is used for conveying slag to a slag discharging groove (F) of the box body;

a slag baffle (23) is arranged at the slag discharge groove (F) of the box body, and the slag baffle (23) is used for leading slag to enter the slag discharge spiral shell (26);

a slag conveying disc driving motor (34) is arranged on the box body (17), a slag conveying disc driving gear (36) is arranged in the box body (17), the slag conveying disc driving gear (36) is connected with the slag conveying disc driving motor (34), a slag conveying disc driven gear (35) is arranged on the slag conveying disc (37), the slag conveying disc driven gear (35) is connected with the slag conveying disc (37), and the slag conveying disc driven gear (35) is in meshed connection with the slag conveying disc driving gear (36);

or, a plurality of permanent magnets are arranged at the edge of the slag conveying disc (37), and a plurality of electromagnets are arranged on the outer wall of the box body (17) so as to drive the slag conveying disc (37) to rotate.

7. A vertical centrifugal separator with an open auxiliary feed structure according to claim 1, characterized in that: the spiral lifting device (48) is provided with a diameter-expanding shell (481), the top of the diameter-expanding shell (481) is connected with a liquid lifting pipe (31), the bottom of the diameter-expanding shell (481) is open, and the inner wall of the diameter-expanding shell (481) is provided with lifting spiral blades (482);

the lifting screw blade (482) extends beyond the bottom of the diameter-expanding housing (481) to form an extending screw blade (485).

8. A vertical centrifugal separator with an open auxiliary feed structure according to claim 1, characterized in that: a conical cap (484) is arranged in the middle of the diameter-expanding shell (481), and a liquid inlet channel is formed between the outer wall of the conical cap (484) and the inner wall of the diameter-expanding shell (481).

9. A vertical centrifugal separator with an open auxiliary feed structure according to claim 1, characterized in that: the box body (17) extends downwards to be connected with a lift tube sleeve (30), the lift tube sleeve (30) is sleeved outside the lift tube (31), and a power sealing mechanism is arranged between the lift tube sleeve (30) and the lift tube (31);

the structure of the power sealing mechanism is as follows: the power sealing upper cover (27) and the power sealing lower cover (29) are fixedly connected with the inner wall of the liquid lifting pipe sleeve (30), a groove body is arranged between the power sealing upper cover (27) and the power sealing lower cover (29), the power sealing impeller (28) is fixedly connected with the outer wall of the liquid lifting pipe (31), and the power sealing impeller (28) is positioned in the groove body;

the top of the power sealing impeller (28) is provided with a raised rib, and the top of the inner side of the power sealing lower cover (29) is provided with a raised rib for limiting the unidirectional flow of liquid.

10. A vertical centrifugal separator with an open auxiliary feed structure according to claim 9, characterized in that: an auxiliary liquid inlet spiral blade (42) is arranged on the outer wall of the liquid lifting tube (31), the edge of the auxiliary liquid inlet spiral blade (42) is close to the inner wall of the liquid lifting tube sleeve (30), the bottom of the liquid lifting tube (31) is closed, and a plurality of liquid inlet through holes (53) for liquid inlet are formed in the side wall of the liquid lifting tube (31) at the position above the liquid inlet spiral blade (42);

the edges of the liquid inlet spiral blades (42) are provided with a plurality of gap eliminating blocks (43), and the gap eliminating blocks (43) are in sliding contact with the inner wall of the liquid lifting tube sleeve (30);

the sum of the areas of the plurality of liquid inlet through holes (53) is larger than the flow area of the lift pipe (31).