Box body of double-screw extruder

Abstract

The utility model relates to a double-screw extruder box body which comprises a cylindrical gear box body, a cooling sleeve is arranged on the outer side of the gear box body, the cooling sleeve extends in the circumferential direction of the outer side wall of the gear box body, a plurality of sets of heat dissipation through grooves are formed in the inner side of the gear box body from top to bottom, the heat dissipation through grooves are formed in a ring shape in the circumferential direction of the gear box body, and the cooling sleeve is arranged in the gear box body. A heat dissipation through groove is formed in the gear box body, a semi-annular cooling block is arranged in the heat dissipation through groove, one side of the semi-annular cooling block penetrates through the heat dissipation through groove and then is connected with the cooling sleeve, and a rotating assembly is arranged at one end of the gear box body and used for driving the gear box body to rotate in the circumferential direction of the cooling sleeve. The internal part of the gear box body can be uniformly radiated, and the damage to internal parts of the gear box body caused by over-high local temperature in the gear box body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of twin-screw extruder gear boxes, in particular to a twin-screw extruder box. Background Art

[0002] The twin-screw extruder has the characteristics of forced extrusion, high quality, wide application range, long life, low shear rate, no amount of decomposition, good mixing and plasticizing performance, etc. The twin-screw extruder is used in conjunction with the gear box.

[0003] Since the input shaft speed of the gearbox is high, the temperature inside the gearbox is prone to be too high when the gearbox works for a long time. Generally, the heat dissipation inside the gearbox is carried out naturally through the heat dissipation strips installed on the gearbox, which only allows the surface temperature of the gearbox to be dissipated to a certain extent, but it is difficult to dissipate the heat inside the gearbox evenly, resulting in a high local temperature inside the gearbox, which accelerates the aging of the internal parts of the gearbox and reduces the service life of the product. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a twin-screw extruder housing. The specific technical scheme is as follows:

[0005] The twin-screw extruder case includes a gear case arranged in a cylindrical shape, a cooling sleeve is arranged on the outside of the gear case, the cooling sleeve extends circumferentially along the outer wall of the gear case, a plurality of groups of heat dissipation grooves are arranged on the inside of the gear case from top to bottom, the heat dissipation grooves are opened in a ring shape along the circumference of the gear case, a semi-annular cooling block is arranged in the heat dissipation groove, one side of the semi-annular cooling block passes through the heat dissipation groove and is connected to the cooling sleeve, a rotating component is arranged at one end of the gear case, and the rotating component is used to drive the gear case to rotate around the circumference of the cooling sleeve.

[0006] As an improvement of the above technical solution: it also includes a protective sleeve, the gear housing is located inside the protective sleeve, an annular groove is formed between the outer side of the gear housing and the inner side of the protective sleeve, the cooling sleeve is slidably connected in the annular groove, and the gear housing, protective sleeve, cooling sleeve and semi-annular cooling block are all made of aluminum or copper materials.

[0007] As an improvement of the above technical solution: the rotating assembly includes a fixed plate, a drive motor and a connecting frame, the fixed plate is installed on the protective sleeve, the drive motor is installed at the center of one side of the fixed plate close to the gear box body, and the output shaft of the drive motor is fixedly connected to the cooling sleeve through the connecting frame.

[0008] As an improvement of the above technical solution: it also includes a cooling component, which includes a cooling box, a first liquid pipe and a second liquid pipe. The cooling box is installed on a cooling jacket, and a coolant is provided inside the cooling jacket. A circulating pump and a heat exchanger are provided in the cooling box, and the heat exchanger is connected to the circulating pump through a pipeline. One end of the first liquid pipe is connected to the interior of the cooling jacket, and the other end is connected to the input end of the circulating pump. One end of the second liquid pipe is connected to the interior of the cooling jacket, and the other end is connected to the output end of the circulating pump.

[0009] As an improvement of the above technical solution: a first filter mesh block is arranged on the top of the annular chute, a second filter mesh block is arranged on the bottom of the annular chute, the cross-sectional area formed by the combination of the cooling sleeve and the first filter mesh block is annular, the second filter mesh block is arranged in an annular shape, and a plurality of heat dissipation openings are arranged on the protective sleeve.

[0010] As an improvement of the above technical solution: a fan is installed on one side of the cooling jacket, the air exhaust end of the fan is fixedly connected to an air outlet main pipe, and a side of the air outlet main pipe close to the heat dissipation groove is fixedly connected to a plurality of air outlet branch pipes.

[0011] As an improvement of the above technical solution: the heat dissipation slot array is provided with a plurality of U-shaped connecting blocks, and the semi-annular cooling block is fixedly connected to the inner wall of the gear box body.

[0012] Beneficial effects of the utility model:

[0013] 1. When the gearbox is running for a long time, start the rotating assembly to slowly drive the cooling jacket to rotate in the annular chute, and simultaneously rotate multiple semi-annular cooling blocks on the upper, middle and lower sides of the gearbox, so that the semi-annular cooling blocks can evenly absorb the heat inside the gearbox, and then transfer the heat to the cooling jacket through the semi-annular cooling blocks, so that the cooling jacket can dissipate the heat to the outside. And while rotating, the inner side of the cooling jacket can effectively contact the outer side of the gearbox, so that the cooling jacket absorbs the heat absorbed by the gearbox and then dissipates the heat.

[0014] 2. When the semi-annular cooling block rotates, the heat inside the gear box will be dissipated from each heat dissipation groove to the annular groove, and then dissipated from the annular groove to the outside, thereby further dissipating the heat evenly inside the gear box and avoiding the local temperature inside the gear box from being too high and causing damage to the internal components of the gear box.

[0015] 3. While rotating the cooling jacket, start the fan. The hot air from the upper, middle and lower sides of the gear box can be evenly drawn out through the main air outlet pipe and branch pipes, and dissipated to the outside through the annular chute. At the same time, it can also take away part of the heat in the annular chute, cooling jacket and semi-annular cooling block, so as to achieve better heat dissipation effect inside the gear box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the connection structure between the overall gear box body and the protective sleeve of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal structure of the utility model as a whole;

[0019] Figure 4 This is a schematic diagram of the enlarged structure at point A in Figure 3.

[0020] Figure numerals: 1, gear box body; 100, heat dissipation groove; 200, annular slide groove; 2, protective sleeve; 21, heat dissipation port; 3, cooling jacket; 31, semi-annular cooling block; 4, U-shaped connecting block; 5, cooling box body; 51, first liquid pipe; 52, second liquid pipe; 6, fan; 61, air outlet main pipe; 7, first filter block; 8, fixing plate; 81, drive motor; 82, connecting frame; 9, second filter block. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] Example

[0023] Please refer to Figure 1-Figure 4 The twin-screw extruder casing comprises a gear case 1 which is arranged in a cylindrical shape, a cooling jacket 3 is arranged on the outside of the gear case 1, a coolant is injected into the cooling jacket 3, the cooling jacket 3 extends circumferentially along the outer wall of the gear case 1, a plurality of heat dissipation grooves 100 are arranged on the inside of the gear case 1 from top to bottom, the heat dissipation grooves 100 are opened in a ring shape along the circumference of the gear case 1, a semi-annular cooling block 31 is arranged in the heat dissipation groove 100, and one side of the semi-annular cooling block 31 passes through the heat dissipation groove 100 and is connected to the inside of the cooling jacket 3.

[0024] Furthermore, one side of the semi-annular cooling block 31 is connected to the interior of the cooling sleeve 3, so that the semi-annular cooling block 31 is also filled with coolant. A rotating component is provided at one end of the gear box body 1, and the rotating component is used to drive the gear box body 1 to rotate around the circumference of the cooling sleeve 3.

[0025] In an optional embodiment: it also includes a protective sleeve 2, the gear case 1 is located inside the protective sleeve 2, an annular groove 200 is formed between the outer side of the gear case 1 and the inner side of the protective sleeve 2, the cooling sleeve 3 is slidably connected in the annular groove 200, the gear case 1, the protective sleeve 2, the cooling sleeve 3 and the semi-annular cooling block 31 are all made of aluminum or copper materials, so that they have good thermal conductivity, and the mutual contact between the cooling sleeve 3 and the gear case 1 and the protective sleeve 2 can conveniently transfer the heat generated by the working operation inside the gear case 1 through them, and the protective sleeve 2 can protect the gear case 1 and the cooling sleeve 3.

[0026] In an optional embodiment: the rotating assembly includes a fixed plate 8, a driving motor 81 and a connecting frame 82, the fixed plate 8 is installed on the protective tube sleeve 2, the driving motor 81 is installed at the center of one side of the fixed plate 8 close to the gear box body 1, and the output shaft of the driving motor 81 is fixedly connected to the cooling sleeve 3 through the connecting frame 82. Furthermore, the driving motor 81 is a reduction motor, which can enable the driving motor 81 to drive the cooling sleeve 3 to rotate slowly to prevent it from rotating too fast and generating a large amount of heat due to friction.

[0027] In an optional embodiment: it also includes a cooling component, the cooling component includes a cooling box 5, a first liquid pipe 51 and a second liquid pipe 52, the cooling box 5 is installed on the cooling jacket 3, the cooling jacket 3 is provided with coolant inside, a circulating pump and a heat exchanger are provided in the cooling box 5, the heat exchanger is connected to the circulating pump through a pipeline, one end of the first liquid pipe 51 is connected to the interior of the cooling jacket 3, and the other end is connected to the input end of the circulating pump, one end of the second liquid pipe 52 is connected to the interior of the cooling jacket 3, and the other end is connected to the output end of the circulating pump.

[0028] Specifically, the circulating pump can drive the coolant inside the cooling jacket 3 to flow continuously, and the heat exchanger can cool the passing coolant, thereby maintaining the cooling effect of the coolant, allowing the cooling jacket 3 and the semi-annular cooling block 31 to continuously and effectively absorb the heat dissipated from the gear box 1.

[0029] In an optional embodiment: a first filter mesh block 7 is arranged on the top of the annular chute 200, a second filter mesh block 9 is arranged on the bottom of the annular chute 200, the cross-sectional area formed by the combination of the cooling jacket 3 and the first filter mesh block 7 is annular, and the second filter mesh block 9 is arranged in an annular shape, so that the top of the annular chute 200 can be blocked by the cooling jacket 3 and the first filter mesh block 7, and the bottom of the annular chute 200 can be blocked by the second filter mesh block 9, so as to prevent external impurities from entering the interior of the gear box body 1 through the annular chute 200 and the heat dissipation groove 100, and a plurality of heat dissipation openings 21 are provided on the protective sleeve 2, and a filter mesh is installed in the heat dissipation opening 21, and hot air is dispersed to the outside through the heat dissipation opening 21.

[0030] In an optional embodiment: a fan 6 is installed on one side of the cooling jacket 3, and the exhaust end of the fan 6 is fixedly connected to an air outlet main pipe 61, and a plurality of air outlet branch pipes are fixedly connected to the side of the air outlet main pipe 61 close to the heat dissipation groove 100. Furthermore, the air outlet branch pipes are located in the heat dissipation groove 100. During heat dissipation, the hot air inside the gear box body 1 can be quickly extracted by the fan 6, and the hot air mainly flows out through the heat dissipation port 21, thereby improving the heat dissipation rate inside the gear box body 1.

[0031] In an optional embodiment: the heat dissipation groove 100 array is provided with a plurality of U-shaped connecting blocks 4, the semi-annular cooling block 31 is fixedly connected to the inner wall of the gear box body 1, and the semi-annular cooling block 31 is located on the inner side of the U-shaped connecting block 4, and the gear box body 1 itself is reinforced by a plurality of U-shaped connecting blocks 4.

[0032] Specifically, when the gear box 1 is operated for a short time, on the one hand, the heat inside the gear box 1 can naturally flow into the annular groove 200 through the heat dissipation groove 100, and then flow out from the annular groove 200 to the outside of the protective sleeve 2; on the other hand, the semi-annular cooling block 31 and the cooling sleeve 3 filled with coolant can also absorb the heat dissipated from the inside of the gear box 1, thereby achieving the heat dissipation effect on the inside of the gear box 1.

[0033] When the gear box 1 is running for a long time, the circulation pump and heat exchanger inside the cooling box 5 are operated to maintain the cooling effect of the coolant inside the cooling jacket 3 and the semi-annular cooling block 31. The cooling jacket 3 is slowly driven to rotate in the annular groove 200 through the rotating component, and multiple semi-annular cooling blocks 31 are synchronously rotated on the upper, middle and lower sides of the gear box 1, so that the semi-annular cooling blocks 31 can evenly absorb the heat inside the gear box 1. The coolant injected into the semi-annular cooling blocks 31 can accelerate the absorption of heat and improve the heat dissipation effect. The heat is then transferred to the cooling jacket 3 through the semi-annular cooling blocks 31, allowing the cooling jacket 3 to dissipate the heat to the outside. And while rotating, the inner side of the cooling sleeve 3 can effectively contact the outer side of the gear box body 1, so that the cooling sleeve 3 absorbs the heat absorbed by the gear box body 1 and then dissipates the heat. When the semi-annular cooling block 31 rotates, the heat inside the gear box body 1 will be dissipated from each heat dissipation groove 100 to the annular groove 200, and then dissipated from the annular groove 200 to the outside world, so that the inside of the gear box body 1 can be evenly cooled to avoid the local temperature inside the gear box body 1 being too high and causing damage to the internal components of the gear box body 1.

[0034] While rotating the cooling sleeve 3, start the fan 6, and the hot air from the upper, middle and lower sides of the gear box 1 can be evenly drawn out through the main air outlet pipe 61 and the branch pipes, and dissipated to the outside through the annular groove 200. At the same time, it can also take away part of the heat in the annular groove 200, the cooling sleeve 3 and the semi-annular cooling block 31, so that the heat dissipation effect inside the gear box 1 is better.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Twin-screw extruder casing, characterized in that: The invention comprises a gear case (1) arranged in a cylindrical shape, a cooling sleeve (3) being arranged on the outer side of the gear case (1), the cooling sleeve (3) extending circumferentially along the outer wall of the gear case (1), a plurality of heat dissipation grooves (100) being arranged on the inner side of the gear case (1) from top to bottom, the heat dissipation grooves (100) being opened in a ring shape along the circumference of the gear case (1), a semi-annular cooling block (31) being arranged in the heat dissipation groove (100), one side of the semi-annular cooling block (31) passing through the heat dissipation groove (100) and connected to the cooling sleeve (3), a rotating assembly being arranged at one end of the gear case (1), the rotating assembly being used to drive the gear case (1) to rotate around the circumference of the cooling sleeve (3).

2. The twin-screw extruder casing according to claim 1, characterized in that: It also includes a protective sleeve (2), the gear housing (1) is located inside the protective sleeve (2), an annular groove (200) is formed between the outer side of the gear housing (1) and the inner side of the protective sleeve (2), the cooling sleeve (3) is slidably connected in the annular groove (200), and the gear housing (1), the protective sleeve (2), the cooling sleeve (3) and the semi-annular cooling block (31) are all made of aluminum or copper.

3. The twin-screw extruder casing according to claim 2, characterized in that: The rotating assembly comprises a fixed plate (8), a driving motor (81) and a connecting frame (82); the fixed plate (8) is mounted on the protective sleeve (2); the driving motor (81) is mounted at the center of one side of the fixed plate (8) close to the gear box (1); and the output shaft of the driving motor (81) is fixedly connected to the cooling sleeve (3) via the connecting frame (82).

4. The twin-screw extruder casing according to claim 3, characterized in that: The invention also comprises a cooling assembly, wherein the cooling assembly comprises a cooling box (5), a first liquid pipe (51) and a second liquid pipe (52); the cooling box (5) is mounted on a cooling jacket (3); a cooling liquid is provided inside the cooling jacket (3); a circulating pump and a heat exchanger are provided inside the cooling box (5); the heat exchanger is connected to the circulating pump through a pipeline; one end of the first liquid pipe (51) is connected to the inside of the cooling jacket (3), and the other end is connected to the input end of the circulating pump; one end of the second liquid pipe (52) is connected to the inside of the cooling jacket (3), and the other end is connected to the output end of the circulating pump.

5. The twin-screw extruder casing according to claim 4, characterized in that: A first filter mesh block (7) is arranged at the top of the annular slide groove (200), a second filter mesh block (9) is arranged at the bottom of the annular slide groove (200), the cross-sectional area formed by the combination of the cooling sleeve (3) and the first filter mesh block (7) is annular, the second filter mesh block (9) is arranged in an annular shape, and a plurality of heat dissipation openings (21) are arranged on the protective sleeve sleeve (2).

6. The twin-screw extruder casing according to claim 5, characterized in that: A fan (6) is installed on one side of the cooling jacket (3); an air exhaust end of the fan (6) is fixedly connected to an air outlet main pipe (61); and a side of the air outlet main pipe (61) close to the heat dissipation groove (100) is fixedly connected to a plurality of air outlet branch pipes.

7. The twin-screw extruder casing according to claim 1, characterized in that: The heat dissipation groove (100) array is provided with a plurality of U-shaped connection blocks (4), and the semi-annular cooling block (31) is fixedly connected to the inner wall of the gear box body (1).

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