CN210011293U - Double-screw extruder - Google Patents

Abstract

The utility model relates to a double screw extruder. The utility model comprises a threaded sleeve (9); be provided with two screw rods in the swivel nut, motor (1) is rotatory through two screw rods of gear box (4) drive, its characterized in that: any screw consists of a propelling screw (24) and a reverse-thrust screw (26), the propelling screw (24) and the reverse-thrust screw (26) are coaxial, and the propelling screw (24) and the reverse-thrust screw (26) are separated by a spacer bush (25); the tail end of the reverse thrust screw rod (26) is arranged on the screw sleeve through a bearing assembly (35) and an end plate (31). Adopt the technical scheme of the utility model afterwards, solve the cantilever structure of current screw rod, improve double screw extruder's performance.

Description

Double-screw extruder

Technical Field

The utility model relates to a double screw extruder, it adopts the double screw structure, and it is used for extruding of battery thick liquids, also can be used for the production of popped fodder.

Background

The lithium ion battery is a rechargeable battery, which mainly comprises: positive electrode, diaphragm, negative electrode, electrolyte and shell. The diaphragm is a specially formed polymer film, and the film has a microporous structure, so that lithium ions can freely pass through the film, but electrons cannot pass through the film. Known in the prior art are: in the production of lithium ion batteries, the battery slurry is produced by using a twin-screw extruder, and good quality can be obtained, such as: chinese patent publication No. CN 103531745B, CN 103872281 a.

In the existing double-screw extruder, the front part of the double screw is not supported, and the length-diameter ratio of the extruder reaches 44: 1 and above, the screw is used as a cantilever structure in the screw sleeve. The screw is subject to gravity, which inevitably produces sag. Friction can be generated between the screw sleeve and the screw rod to cause abrasion, metal can enter battery slurry, the quality of the battery is seriously affected finally, and safety accidents are caused. Regarding the cantilever structure of the screw, refer to chinese patent publication No. CN 202318879U, CN 202781761U.

Disclosure of Invention

The utility model aims at providing a double screw extruder to prior art not enough, its purpose that will realize: the cantilever structure of the existing screw is solved, and the performance of the double-screw extruder is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a double-screw extruder comprises a screw sleeve, wherein the screw sleeve is provided with a hopper, a liquid adding port and a discharge port; be provided with two screws rods in the swivel nut, the motor passes through two screw rod rotations of gear box drive, its characterized in that: any one screw consists of a propelling screw and a reverse-thrust screw, the propelling screw and the reverse-thrust screw are coaxial, the propelling screw and the reverse-thrust screw are separated by a spacer bush, and the discharge port is positioned on a screw sleeve between the propelling screw and the reverse-thrust screw; the tail end of the reverse thrust screw rod is arranged on the screw sleeve through a bearing assembly and an end plate, and the screw sleeve is supported and fixed on the rack through the screw sleeve.

As an improvement of the utility model, the screw sleeve between the propelling screw and the reverse propelling screw is provided with a magnetic suction port, and the magnetic suction port is provided with a magnetic part.

As an improvement of the utility model, a No. 2 sealing ring is arranged between the end plate and the screw sleeve, and the end plate is arranged on the screw sleeve through a positioning pin; and an adjusting gasket, a mechanical labyrinth seal, a screw gland, a sealing ring and a framework oil seal are sequentially sleeved between the tail end of the reverse thrust screw and the bearing assembly.

As an improvement of the utility model, a pressure sensor is arranged on the screw sleeve between the propelling screw rod and the reverse propelling screw rod.

As an improvement of the utility model, the screw sleeve is also provided with an air outlet, a vacuum pumping device, a temperature sensor and a cooling pipeline in sequence.

The beneficial effect after adopting above-mentioned technical scheme:

1. the cantilever structure of solving current screw rod realizes screw rod both ends bearing structure, effectively avoids the difficult problem of current screw rod one end deformation of sinking, and reducing wear improves the performance of double screw extruder.

2. The threaded sleeve at the discharge port is provided with the magnetic suction port, so that magnetic objects at the discharge port are effectively reduced or avoided, and the quality of finished products is improved.

3. The reverse-thrust screw design at the discharge port effectively reduces the pressure at the tail end of the screw, reduces the leakage of materials at the shaft end and improves the performance of the extruder. The mechanical labyrinth seal, the sealing ring and the framework oil seal form three sealing structures, so that the sealing effect of the rotating shaft is improved; a sealing ring is adopted between the end plate and the threaded sleeve, so that the annular sealing effect is ensured; and finally ensures the sealing effect of the tail end of the screw.

4. The discharge port and the pressure sensor are both positioned on the screw sleeve between the pushing screw and the reverse pushing screw, so that the production pressure of the material during extrusion is conveniently adjusted and stabilized, and the production performance of the double-screw extruder is improved.

5. An exhaust port for discharging excess gas during production; the vacuumizing device is used for improving the vacuum degree of the front section of the discharge hole; the temperature sensor is used for transmitting the temperature of the front section of the discharging port in time; and the cooling water pipe is used for cooling the material temperature of the front section of the discharge port in time.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is a schematic view of a partial cross-sectional structure of the area C in FIG. 1;

FIG. 4 is a schematic view of a partial cross-sectional structure of the area B in FIG. 2;

FIG. 5 is a left side view of FIG. 1;

fig. 6 is a right side view of fig. 1.

In the figure:

1. a motor; 2. 1# shield; 3. a torque limiter; 4. a gear case; 5. a junction box; 6. 2# shield; 7. a hopper; 8. a liquid addition port; 9. a threaded sleeve; 10. an exhaust port; 11. adjusting the foot pad; 12. a frame; 13. a wire slot; 14. a vacuum pumping device; 15. a temperature sensor; 16. a cooling pipeline; 17. supporting by a threaded sleeve; 18. a pressure sensor; 19. a rotating arm; 20. a mold temperature controller; 21. a discharge port; 22. 1# sealing ring; 23. a magnetic suction port; 24. a screw is advanced; 25. a spacer sleeve; 26. reversely pushing the screw; 27. adjusting the gasket; 28. mechanical labyrinth sealing; 29. positioning pins; 30. 2# sealing ring; 31. an end plate; 32. a screw rod gland bush; 33. a seal ring; 34. framework oil seal; 35. a bearing assembly;

s, the material advancing direction, and D, the material reverse-pushing direction.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example one

As shown in fig. 1 to 6, a twin-screw extruder comprises a barrel 9, a hopper 7, a liquid adding port 8 and a discharge port 21 are arranged on the barrel, two screws are arranged in the barrel, a motor 1 drives the two screws to rotate through a torque limiter 3 and a gear box 4, a # 1 shield 2 is arranged between the motor 1 and the torque limiter 3, and a # 2 shield 6 is arranged between the gear box 4 and the barrel 9, wherein:

as shown in fig. 3 to 4, any one of the screws is composed of a pushing screw 24 and a reverse pushing screw 26, the pushing screw 24 and the reverse pushing screw 26 are coaxial, and the pushing screw 24 and the reverse pushing screw 26 are separated by a spacer 25; the discharge port 21 is positioned on a threaded sleeve between the pushing screw and the reverse pushing screw, and a No. 1 sealing ring 22 is arranged between the discharge port 21 and the threaded sleeve;

an end plate 31 is further arranged, a No. 2 sealing ring 30 is arranged between the end plate 31 and the threaded sleeve 9, and the end plate 30 is mounted on the threaded sleeve 9 through a positioning pin 29 and a rotating arm 19;

the tail end of the reverse thrust screw 26 is sequentially sleeved with an adjusting gasket 27, a mechanical labyrinth seal 28, a screw gland 32, a sealing ring 33 and a framework oil seal 34, and the reverse thrust screw 26 is finally installed on the threaded sleeve 9 through a bearing assembly 35 and an end plate 31;

the screw sleeve 9 is fixed on a frame 12 through a screw sleeve support 17, and the frame 12 is placed on the ground through an adjusting foot pad 11;

in order to facilitate electrical connection, the rack 12 is further provided with a junction box 5 and a wire casing 13.

In order to conveniently control the temperature, the double-screw extruder can be further provided with a mold temperature controller 20 and a cooling pipeline 16, and a temperature sensor 15 is further arranged on the screw sleeve. According to the temperature data detected by the temperature sensor 15, the mold temperature controller 20 is connected with the cooling pipeline 16 to ensure that the normal working temperature of the twin-screw extruder is within a set range, such as: when producing the battery paste, the set temperature was 25 ℃.

For the convenience of exhausting and vacuumizing, an exhaust port 10 and a vacuumizing device 14 are also arranged on the screw sleeve.

Take the production of battery paste as an example. The powder material enters the propelling screw 24 from the hopper 7; liquid materials enter the propelling screw 24 from the liquid adding port 8 and finally are dispersed and mixed in solid and liquid; the exhaust port 10 is used for natural exhaust near the feed port and exhausting gas brought in by the powdery material; the vacuum pumping device 14 forcibly pumps air in the process of dispersing and mixing the materials to ensure that no air exists in the slurry.

During normal production, as shown in fig. 3-4, the material advancing direction S is opposite to the material direction D. After the screw 24 is pushed, a spacer bush 25 is arranged to buffer materials for convenient discharging; the reverse-pushing screw rod 26 reversely pushes the forward moving material back to the area of the discharge hole to serve as a first seal to protect a sealing device behind the first seal; a second seal is arranged behind the thrust screw 26: a mechanical labyrinth seal 28; the pushing screw 24, the spacer 25, the reverse pushing screw 26 and the mechanical labyrinth seal 28 are locked by the screw gland 32.

For conveniently dismantling the screw rod and changing the screw rod configuration, the end plate 31 passes through locating pin 29 and swivel nut 9 location, and the end plate 31 is provided with 2# sealing ring 33, skeleton oil blanket 34 and is sealed as third and fourth, guarantees that the material does not reveal. Meanwhile, the end plate 31 is also provided with a bearing assembly 35 which supports the head of the screw rod, and the cantilever structure of the screw rod is changed into a two-end supporting structure, so that the problem of sinking and deformation of one end of the conventional screw rod is effectively solved, the abrasion is reduced, and the performance of the double-screw extruder is improved.

Example two

As an improvement of the first embodiment of the present invention, as shown in fig. 1 to 3, a magnetic suction port 23 is further provided on the threaded sleeve between the thrust screw 24 and the reverse thrust screw 26, and a magnetic component is mounted on the magnetic suction port.

This magnetism is inhaled mouth 23 and is located discharge gate 21 top, and magnetic part can absorb the magnetic metal after the wearing and tearing, promotes the product quality.

EXAMPLE III

As an improvement of the first embodiment of the present invention, as shown in fig. 1 to 3, a pressure sensor 18 is further disposed on the screw sleeve between the thrust screw 24 and the reverse thrust screw 26.

The present invention is not limited to the above embodiments, and all technical solutions formed by equivalent replacement or equivalent replacement belong to the scope of the claimed invention.

Claims (5)

1. A double-screw extruder comprises a screw sleeve (9), wherein a hopper (7), a liquid adding port (8) and a discharging port are arranged on the screw sleeve; be provided with two screw rods in the swivel nut, motor (1) is rotatory through two screw rods of gear box (4) drive, its characterized in that:

any screw consists of a propelling screw (24) and a reverse-thrust screw (26), the propelling screw (24) and the reverse-thrust screw (26) are coaxial, the propelling screw (24) and the reverse-thrust screw (26) are separated by a spacer bush (25), and the discharge port (21) is positioned on a screw sleeve between the propelling screw and the reverse-thrust screw;

the tail end of the reverse thrust screw rod (26) is mounted on a screw sleeve through a bearing assembly (35) and an end plate (31), and the screw sleeve (9) is fixed on the rack (12) through a screw sleeve support (17).

2. A twin screw extruder as defined in claim 1 wherein: and a magnetic suction port (23) is also arranged on the threaded sleeve between the propelling screw rod (24) and the reverse propelling screw rod (26), and a magnetic part is installed on the magnetic suction port.

3. A twin screw extruder as defined in claim 1 wherein: a No. 2 sealing ring (30) is arranged between the end plate (31) and the threaded sleeve (9), and the end plate (31) is installed on the threaded sleeve (9) through a positioning pin (29); an adjusting gasket (27), a mechanical labyrinth seal (28), a screw gland (32), a sealing ring (33) and a framework oil seal (34) are sequentially sleeved between the tail end of the reverse thrust screw (26) and the bearing assembly (35).

4. A twin screw extruder as defined in claim 1 wherein: and a pressure sensor (18) is also arranged on the screw sleeve between the propelling screw rod (24) and the reverse propelling screw rod (26).

5. A twin screw extruder as defined in claim 1 wherein: the screw sleeve is also provided with an exhaust port (10), a vacuumizing device (14), a temperature sensor (15) and a cooling pipeline (16).

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