CN220143691U - Degassing device of vertical centrifugal separator - Google Patents

Abstract

The utility model provides a degassing device of a vertical centrifugal separator, which comprises a spiral pusher core body and a rotary drum, wherein the spiral pusher core body is positioned in the rotary drum, a spiral pusher core body liquid outlet is formed in the side wall of the top of the spiral pusher core body, spiral blades are arranged on the outer wall of the spiral pusher core body, the top of the rotary drum is provided with the rotary drum liquid outlet, and a rotary drum slag outlet is formed in the side wall of the bottom of the rotary drum; 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 top of the box body is provided with an air extraction opening, and the air extraction opening is used for being connected with an air extraction device so as to enable a cavity between the spiral pusher core body and the rotary drum to be negative pressure; the bottom of spiral pusher core is equipped with the stalk, is equipped with spiral liquid blocking device in the bottom of stalk, is equipped with the helical blade that blocks the feed liquor at spiral liquid blocking device to promote the vacuum in the stalk, improve mud degassing effect. The vacuum degree in the lift tube can be increased through the superposition effect in the lift tube, and then the degassing effect is improved.

Description

Degassing device of vertical centrifugal separator

Technical Field

The utility model relates to the technical field of drilling fluid separation, in particular to a degassing device of a vertical centrifugal separator.

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. In certain slurries, such as bentonite slurries, a large number of air bubbles may be incorporated which can affect the effectiveness of the slurry centrifugation process. I.e. the parameters set for the centrifuge, do not allow the centrifuge to be in an optimal operating state.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a degassing device of a vertical centrifugal separator, which can greatly improve the degassing effect of slurry, further improve the solid-liquid separation efficiency of the slurry, and is particularly beneficial to reducing the water content of stone slag.

In order to solve the technical problems, the utility model adopts the following technical scheme: the degassing device of the vertical centrifugal separator 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, 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 are 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 top of the box body is provided with an air extraction opening, and the air extraction opening is used for being connected with an air extraction device so as to enable a cavity between the spiral pusher core body and the rotary drum to be negative pressure;

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 liquid blocking device, and the spiral liquid blocking device is provided with a spiral blade for blocking liquid inlet so as to improve the vacuum degree in the lift tube and improve the degassing effect of slurry.

In the preferred scheme, the spiral hinders liquid device and is equipped with the hole enlargement casing, and the top and the lift tube of hole enlargement casing are connected, and the bottom of hole enlargement casing is open, and the inner wall of hole enlargement casing is equipped with hinders liquid helical blade, along with the rotation of lift tube, hinders liquid helical blade and is used for increasing the resistance of feed liquor.

In the preferred scheme, the liquid draining column height of the liquid draining pipe is larger than the liquid inlet column height of the liquid lifting pipe.

In the preferred scheme, a differential mechanism is arranged at the top of the box body;

the input structure of the differential mechanism is connected with the main driving device, the differential mechanism is connected with the spiral pusher core body through a differential mechanism connecting shaft, and the output structure of the differential mechanism is connected with the rotary drum, so that the spiral pusher core body and the rotary drum rotate at different speeds respectively;

the differential mechanism is of a two-stage planetary gear structure, the primary sun gear is in meshed connection with the primary planet gear, and the primary 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 the differential mechanism is connected with the main driving device, the bottom of the casing of the differential mechanism is connected with the rotary drum, the second-stage planet carrier of the second-stage planet wheel is connected with the output shaft of the differential mechanism, and the output shaft of the differential mechanism is connected with the spiral pusher core body;

the top of the box body is fixedly provided with a differential mechanism input shaft fixing bracket, 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 the differential mechanism input shaft fixing bracket is provided with a speed regulation driving device;

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

In the preferred scheme, the rotary drum is connected with the liquid discharge pump blade at a position close to the liquid discharge port of the box body so as to be used for assisting liquid discharge.

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;

the edge of the slag conveying disc is provided with a plurality of permanent magnets, and the outer wall of the box body is provided with a plurality of electromagnets for driving the slag conveying disc to rotate.

In the preferred proposal, 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.

In a preferred scheme, 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 downward unidirectional flow of liquid.

The degassing device of the vertical centrifugal separator has the following beneficial effects that the degassing device is influenced by certain equipment parameters, for example, the vacuum degree of a water ring pump is 0.097MPa, the exhaust effect of slurry is poor under the vacuum degree, and the vacuum degree in a liquid lifting pipe can be increased through the superposition effect by the spiral liquid blocking device, so that the degassing effect is improved. In the preferred scheme, the combination of one or more of the arranged liquid discharge pump blades, the spiral slag discharging device and the power sealing mechanism and the spiral pusher core body with the adjustable rotating speed is beneficial to further improving the negative pressure level in the spiral pusher core body, ensuring smooth feeding, improving the degassing effect of slurry, further improving the efficiency of slurry separation and reducing the water content of stone slag.

The solid control system has the beneficial effects that the structure can be greatly simplified, the work which can be completed by the vacuum deaerator, the desander, the desilter, the low-speed centrifugal machine and 3 sand pumps for supplying liquid to the equipment can be completed before one equipment can be completed, and the quantity of the work can be reducedThe vibrating screen is matched with 1 vibrating screen, so that 1 device can replace the previous 8 devices, and the energy consumption can be greatly reduced. 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. The spiral liquid blocking device adopts a detachable structure, and can correspondingly adjust different working states, such as a self-priming working state, a spiral auxiliary liquid inlet state, a spiral liquid blocking degassing state and the like, according to working condition requirements, namely, factors such as slurry viscosity, gas content, pump pressure, drilling cuttings content and the like. Furthermore, the combination of the spiral pusher core body and the free stepless adjustment of the absolute rotating speed and the relative rotating speed difference of the rotary drum can further adjust according to the characteristics of different slurries, so that the efficiency of slurry separation is further improved. In particular to the water content of slag discharge can be greatly reduced. The utility model can reduce the overall purchase cost of the slurry separation treatment system, simplify the solid control system, reduce the occupied area of equipment, is very convenient to move, can also reduce the total amount of waste slurry in the circulating slurry, and reduces the slurry cost and the waste treatment cost. Can be conveniently combined with other equipment to realize the recycling of sand and clear water. The utility model is beneficial to realizing automation: the variety and the quantity of equipment are reduced, the running performance and the working condition of the equipment are realized by adjusting the rotating speed and the displacement in a self-adaptive way, the screen mesh with different meshes is not required to be replaced by the vibrating screen, the remote control and the automatic control can be realized, the labor consumption is reduced, and the safe and efficient drilling construction is realized. The utility model can simplify the pipeline design of the whole system and can cancel the slurry pump for liquid supply: the liquid supply mode mainly based on self suction is realized, the liquid lifting pipe is inserted into the slurry tank, and an additional liquid supply pipeline and a pump are not required to be arranged. Saving the cost of the sand pump, as well as the time and labor consumed by maintaining the sand pump. The separation efficiency of the utility model reaches 240m ³ And/h, the water content of the stone slag can reach 20%, and the water content of the powdery clay and bentonite slurry can be lower than 40%, so that the technical route of the solid control system is changed, for example, cyclone equipment can be omitted, and the slurry separation efficiency of the whole solid control system is further improved. And can also be due to lower water content of the stone slagThe filter press can be omitted in the solid control system, so that the slurry separation efficiency of the whole solid control system is further improved. But also can reduce the cost and the occupied area of the equipment.

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 of the whole structure of the present utility model after being detached and replaced with a bottom auxiliary liquid inlet structure.

FIG. 3 is a cross-sectional view of the whole structure of the present utility model when the negative pressure liquid inlet structure is replaced.

Fig. 4 is a cross-sectional view of the overall structure of the present utility model for facilitating the adjustment of the rotational speed of the screw feeder core.

Fig. 5 is a cross-sectional view A-A in fig. 3.

Fig. 6 is a sectional view of B-B in fig. 1.

Fig. 7 is a schematic structural view of the differential of the present utility model.

In the figure: the main drive 1, the main motor housing 2, the main motor pulley 3, the drive belt 4, the housing seal 5, the differential connection disk 6, the main bearing lower seal 7, the main bearing 8, the differential 9, the second input shaft 901, the primary sun gear 902, the primary planet 903, the primary planet carrier 904, the input pulley 905, the secondary planet 906, the housing inner teeth 907, the secondary planet carrier 908, the secondary sun gear 909, the first output shaft 910, the second output shaft 911, the main bearing upper seal 10, the main bearing housing 11, the differential input shaft fixing support 12, the differential output shaft 13, the housing upper cover 14, the drum upper shaft disk 15, the liquid discharge pump blade 16, the housing 17, the screw pusher core 18, the screw blade 19, the screw pusher small end upper seal 20, the screw pusher small end bearing 21, the drum 22, the slag blocking plate 23, the screw pusher small end lower seal 24, the housing lower cover 25, the slag pusher screw housing 26, a power seal upper cover 27, a power seal impeller 28, a power seal lower cover 29, a lift tube sleeve 30, a lift 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 discharging screw 40, a slag discharging screw motor 41, a permanent magnet 42, an electromagnet 43, an expanding cavity 44, a liquid inlet box 45, a speed regulation driving device 46, an annular liquid collecting groove 47, a screw lifting device 48, an expanding shell 481, a lifting screw blade 482, a centrifugal baffle 483, a conical cap 484, an extending screw blade 485, a liquid blocking screw blade 486, a box lower seal 49, a screw liquid blocking device 50, a box liquid discharge port C, a pusher core liquid discharge port D, a drum slag discharge port E, a box 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 degassing device of a vertical centrifugal separator 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, the top of the box 17 is provided with an extraction opening J, and the extraction opening J is used for connecting an air extractor so as to enable a cavity between the spiral pusher core 18 and the rotary drum 22 to be negative pressure;

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;

the bottom of the lift tube 31 is provided with a spiral liquid blocking device 50, and the spiral liquid blocking device 50 is provided with a spiral blade for blocking liquid inlet so as to improve the vacuum degree in the lift tube 31 and improve the degassing effect of slurry.

In a preferred embodiment, as shown in fig. 1, the spiral liquid blocking device 50 is provided with an expanding shell 481, the top of the expanding shell 481 is connected with a liquid lifting tube 31, the bottom of the expanding shell 481 is open, the inner wall of the expanding shell 481 is provided with a liquid blocking spiral blade 486, and the liquid blocking spiral blade 486 rotates along with the rotation of the liquid lifting tube 31, so as to increase the liquid feeding resistance. This structure increases the vacuum degree in the lift tube 31 to improve the exhaust effect, and the gas is discharged from the drum drain port K. When the spiral liquid blocking device is used, the air suction opening J is connected into the water ring vacuum pump, the vacuum degree is about-0.097 MPa, the vacuum degree generated by the spiral liquid blocking device 50 is about 0.02 MPa, and the vacuum degree of liquid inlet is about-0.12 MPa, so that bubbles are more easily separated from slurry, and the degassing effect of the slurry is improved.

In a preferred embodiment, as shown in fig. 2, the spiral liquid blocking device 50 is in a detachable structure, for example, the spiral lifting device 48 is replaced by a detachable structure, the spiral lifting device 48 is provided with a diameter-enlarging shell 481, the top of the diameter-enlarging shell 481 is connected with the liquid lifting tube 31, the bottom of the diameter-enlarging shell 481 is open, the inner wall of the diameter-enlarging shell 481 is provided with a lifting spiral blade 482, and the rotation direction of the lifting spiral blade 482 is opposite to that of the liquid blocking spiral blade 486. The spiral lifting device 48 is driven to rotate by the liquid lifting pipe 31, and the rotation of the spiral blade 482 generates axial upward thrust to realize auxiliary liquid feeding. For some working conditions, vacuum is not added, and the structure can independently complete liquid feeding operation.

The preferred embodiment is shown in fig. 2, in which the lifting screw 482 extends beyond the bottom of the enlarged diameter housing 481 to form an extending screw 485. With this structure, better liquid feeding is realized.

As shown in fig. 2, a taper cap 484 is preferably provided in the middle of the diameter-enlarged housing 481; the taper cap 484 can improve the auxiliary liquid intake efficiency.

Further preferably, as shown in fig. 2, an annular centrifugal baffle 483 is provided near the diameter-enlarged housing 481. The centrifugal baffle 483 can block slurry thrown away by centrifugal force, so that vortex is prevented from being formed at the liquid inlet position, and the liquid inlet effect is improved.

Example 2:

in the preferred embodiment, as shown in fig. 3, the height H2 of the drain column of the drain pipe 32 is greater than the height H1 of the liquid column of the lift pipe 31. With this structure, the vacuum degree in the screw pusher core 18 is further increased by the liquid intake and discharge level difference. So as to further improve the degassing effect and the liquid discharge effect.

The preferred embodiment is shown in fig. 3 where the bottom of the drain 32 is below or flush with the bottom of the lift tube 31. With this configuration, a liquid level difference is formed between the drain pipe 32 and the lift pipe 31, thereby assisting in draining.

Example 3:

in a preferred embodiment, as shown in fig. 7, a differential 9 is provided on the top of the casing 17;

the input structure of the differential 9 is connected with the main driving device 1, the differential 9 is connected with the spiral pusher core 18 through the differential connecting shaft 13, and the output structure of the differential 9 is connected with the rotary drum 22, so that the spiral pusher core 18 and the rotary drum 22 rotate at different speeds respectively.

Preferably, the differential 9 is of a two-stage planetary gear structure, the primary sun gear 902 is in meshed connection with the primary planet gears 903, and the primary planet gears 903 are in meshed connection with the inner teeth 907 of the 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 9 is connected to the main drive 1, the housing bottom of the differential 9 is connected to the drum 22, the secondary planet carrier 908 of the secondary planet wheel 906 is connected to the differential output shaft 911, and the differential output shaft 911 is connected to the screw pusher core 18. Preferably, an input pulley 905 is arranged on the outer wall of the casing of the differential 9, the main driving device 1 is connected with the main motor pulley 3, the main motor pulley 3 is connected with the input pulley 905 through a transmission belt 4, the bottom of the casing of the differential 9 is connected with the rotary drum 22 through a casing connecting part 910, namely the rotary drum 22 directly transmits through the casing of the differential 9, the secondary planet carrier 908 of the secondary planet wheel 906 is connected with a differential output shaft 911, and the differential output shaft 911 is connected with the spiral pusher core 18. With this structure, more speed control schemes are realized.

The top of the box 17 is fixedly provided with a differential input shaft fixing bracket 12, the 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 the differential input shaft fixing bracket 12 is provided with a speed regulation driving device 46;

the primary sun gear 902 is connected to the variable speed drive 46 via a second input shaft 901. Preferably, the speed-adjusting drive 46 is an adjustable-speed motor with its own speed reducer, such as a DC permanent magnet motor with its own speed reducer, a stepper motor, or the like. The second input shaft 901 is driven to rotate forward or backward at different speeds by the speed regulation driving device 46, so that the rotating speed of the spiral pusher core 18 can be conveniently regulated, and the optimal rotating speed can be regulated according to the mud state.

Example 4:

in a preferred embodiment, as shown in fig. 1-4, the drum 22 is connected to the drainage pump blade 16 at a location near the tank drain port C for assisting drainage. By the rotation of the liquid discharge pump vane 16, the liquid is discharged from the tank liquid discharge port C by the centrifugal force.

In the preferred scheme, be close to box leakage fluid dram C's position, be equipped with annular liquid collecting groove 47 on the box 17, box leakage fluid dram C is located annular liquid collecting groove 47's outer wall position, and the top of rotary drum 22 is connected with the top of drainage pump blade 16, and drainage pump blade 16 is a plurality of, and drainage pump blade 16 is located annular liquid collecting groove 47. With this structure, the negative pressure is generated at the position by the centrifugal force of the liquid discharge pump blade 16, so that the vacuum degree at the position of the liquid discharge port C of the tank is increased, and the solid-liquid separation efficiency is further improved.

Example 5:

in the preferred proposal, as shown in figures 3, 5 and 6, a box slag discharging groove F is arranged at the position of the box 17 close to the 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, the outlet of the complete machine slag discharging port G of the slag discharging spiral shell 26 is inclined upward so that a slag discharging congestion section is formed at the complete machine slag discharging port G.

In the preferred scheme, as shown in fig. 4, a rotatable slag conveying disc 37 is arranged at a position close to a 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 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 17 so as to drive the slag conveying disc 37 to rotate. With the structure, the contact type driving structure is reduced, and the contact type driving structure is prevented from being blocked by slag discharge.

In a preferred embodiment, as shown in fig. 5 and 6, a slag baffle 23 is provided at the slag discharging groove F of the case, and the slag baffle 23 is used to make slag enter the slag discharging spiral case 26.

In another alternative scheme, as shown in fig. 5 and 6, 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 inner side of the box body 17, the slag conveying disc driven gear 35 is connected with a slag conveying disc 37, and the slag conveying disc driven gear 35 is in meshed connection with the slag conveying disc driving gear 36. With this structure, the slag conveying dish 37 is driven to reciprocally rotate. The scheme is suitable for more viscous slurry.

Example 6:

in the preferred embodiment, as shown in fig. 1 and 3, the box 17 extends downward to be connected with the 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.

In a preferred embodiment, as shown in fig. 1 and 3, the power sealing mechanism has the following structure: 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 downward. The dynamic seal impeller 28 of the dynamic seal mechanism acts like a centrifugal pump vane to achieve a one-way seal and has a clearance that allows for self-adaptive adjustment of the center of rotation. The power sealing mechanism is helpful for improving the vacuum degree of the J position of the extraction opening.

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. 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 degassing device of a vertical centrifugal separator, which is characterized in that: 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, a spiral pusher core liquid outlet (D) is formed in the top side wall 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 bottom side wall 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), the top of the box body (17) is provided with an extraction opening (J), and the extraction opening (J) is used for being connected with an air extractor so as to enable a cavity between the spiral pusher core (18) and the rotary drum (22) to be negative pressure;

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);

the bottom of the lift tube (31) is provided with a spiral liquid blocking device (50), and the spiral liquid blocking device (50) is provided with a spiral blade for blocking liquid inlet so as to improve the vacuum degree in the lift tube (31) and the degassing effect of slurry.

2. A degassing apparatus for a vertical centrifugal separator according to claim 1, wherein: the spiral liquid blocking device (50) is provided with an expanding shell (481), the top of the expanding shell (481) is connected with the liquid lifting pipe (31), the bottom of the expanding shell (481) is open, the inner wall of the expanding shell (481) is provided with liquid blocking spiral blades (486), and the liquid blocking spiral blades (486) are used for increasing the liquid inlet resistance along with the rotation of the liquid lifting pipe (31).

3. A degassing apparatus for a vertical centrifugal separator according to claim 1, wherein: the liquid draining column height (H2) of the liquid draining pipe (32) is larger than the liquid inlet column height (H1) of the liquid lifting pipe (31).

4. A degassing apparatus for a vertical centrifugal separator according to claim 1, wherein: the differential mechanism (9) is arranged at the top of the box body (17);

the input structure of the differential mechanism (9) is connected with the main driving device (1), the differential mechanism (9) is connected with the spiral pusher core body (18) through a differential mechanism connecting shaft (13), and the output structure of the differential mechanism (9) is connected with the rotary drum (22) so that the spiral pusher core body (18) and the rotary drum (22) rotate at different speeds respectively;

the differential mechanism (9) is of a two-stage planetary gear structure, the primary sun gear (902) is connected with the primary planet gear (903) in a meshed mode, and the primary planet gear (903) is connected with the inner teeth (907) of the shell in a meshed mode;

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 the differential mechanism (9) is connected with the main driving device (1), the bottom of the casing of the differential mechanism (9) is connected with the rotary drum (22), the second-stage planet carrier (908) of the second-stage planet wheel (906) is connected with the differential mechanism output shaft (911), and the differential mechanism output shaft (911) is connected with the spiral pusher core (18);

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).

5. A degassing apparatus for a vertical centrifugal separator according to claim 1, wherein: at a position close to the liquid discharge port (C) of the tank body, the rotary drum (22) is connected with the liquid discharge pump blade (16) for assisting liquid discharge.

6. A degassing apparatus for a vertical centrifugal separator according to claim 5, wherein: 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).

7. A degassing apparatus for a vertical centrifugal separator according to claim 1, wherein: 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 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).

8. A degassing apparatus for a vertical centrifugal separator according to claim 7, wherein: 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;

the edge of the slag conveying disc (37) is provided with a plurality of permanent magnets, and the outer wall of the box body (17) is provided with a plurality of electromagnets to drive the slag conveying disc (37) to rotate.

9. A degassing apparatus for a vertical centrifugal separator according to claim 1, wherein: 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).

10. A degassing apparatus for a vertical centrifugal separator according to claim 9, wherein: 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 downward unidirectional flow of liquid.