CN111003428A

CN111003428A - High-temperature spiral feeder

Info

Publication number: CN111003428A
Application number: CN202010110788.7A
Authority: CN
Inventors: 王国庆
Original assignee: Luoyang Torch Star Kiln Co ltd
Current assignee: Luoyang Torch Star Kiln Co ltd
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-04-14

Abstract

The invention relates to the field of material conveying equipment, in particular to a high-temperature spiral feeder. The device comprises a motor reducer, a cooling section, a heat insulation section and a high-temperature feeding section which are connected in sequence, wherein an output shaft of the motor reducer penetrates through the cooling section and then is connected with a packing auger main shaft in the high-temperature feeding section through a coupling in the heat insulation section; the cooling section comprises a cooling box body, a temperature sensor arranged in an inner cavity of the cooling box body, a semiconductor refrigerator arranged on the wall of the cooling box body and a temperature controller arranged outside the cooling box body, a first heat insulation gasket is clamped between the cooling box body and the motor reducer, a second heat insulation gasket is clamped between the cooling box body and the heat insulation section, the signal output of the temperature sensor is connected with the temperature controller, the signal output of the temperature controller is connected with the semiconductor refrigerator, and the temperature signal measured by the temperature sensor can control the on-off of the semiconductor refrigerator through the temperature controller; the invention has compact structure, does not need water cooling and can ensure the continuous conveying of materials at high temperature.

Description

High-temperature spiral feeder

Technical Field

The invention relates to the field of material conveying equipment, in particular to a high-temperature spiral feeder.

Background

In industrial production, a high-temperature screw feeder is required to transfer high-temperature materials between heating furnaces or between a heating furnace and an external production line. In order to ensure normal operation at high temperature, the feeding section of the high-temperature spiral feeder usually adopts high-temperature resistant materials and bearings, and the motor reducer driving the spiral auger to feed materials in a rotating manner cannot meet the requirement of high-temperature resistance. Some high-temperature spiral feeders separate the motor and the speed reducer from the feeding section, and drive the spiral packing auger to rotate through a chain or a gear. The structure can cause the volume of the whole high-temperature screw feeder to be large and the transmission to be unstable. And the output shafts of the motor and the speed reducer are directly connected with the spiral auger of the feeding section by some high-temperature spiral feeders, a continuous water cooling device is additionally arranged between the feeding section and the output shaft of the motor speed reducer, and the heat transferred from the feeding section is taken away by cooling water, so that the normal work of the motor speed reducer can be prevented from being influenced by the high temperature of the feeding section. Although the structure is compact, the water sealing of the rotating shaft at high temperature is complex, and continuous water adding is needed for cooling, so that water resources are wasted, and the operation cost is high.

Disclosure of Invention

The invention aims to provide a high-temperature spiral feeder which is compact in structure, does not need water cooling and can ensure high-temperature continuous conveying of materials.

In order to solve the technical problems, the invention adopts the technical scheme that: a high-temperature spiral feeder comprises a motor reducer, a cooling section, a heat insulation section and a high-temperature feeding section which are connected in sequence, wherein an output shaft of the motor reducer penetrates through the cooling section and then is connected with a packing auger main shaft in the high-temperature feeding section through a coupling in the heat insulation section;

the cooling section comprises a cooling box body, a temperature sensor arranged in an inner cavity of the cooling box body, a semiconductor refrigerator arranged on the wall of the cooling box body and a temperature controller arranged outside the cooling box body, a first heat insulation gasket is clamped between the cooling box body and the motor reducer, a second heat insulation gasket is clamped between the cooling box body and the heat insulation section, the signal output of the temperature sensor is connected with the temperature controller, the signal output of the temperature controller is connected with the semiconductor refrigerator, and the temperature signal measured by the temperature sensor can control the on-off of the semiconductor refrigerator through the temperature controller;

the heat insulation section comprises a heat insulation box body, the coupler is arranged in the inner cavity of the heat insulation box body and is provided with a third heat insulation gasket for separating heat transfer between the auger main shaft and the output shaft, and a fourth heat insulation gasket is clamped between the heat insulation box body and the high-temperature feeding section;

the high-temperature feeding section comprises a feeding shell, a feeding port and a discharging port are respectively arranged at two ends of the feeding shell, two ends of the auger spindle are respectively rotatably arranged in bearing seats at corresponding end parts of the feeding shell, and auger blades are arranged on the auger spindle.

Preferably, the semiconductor refrigerator comprises semiconductor refrigeration sheets fixed on the wall of the cooling box body, a cold guide device and a cooling fan are sequentially arranged on one side, facing the inner cavity of the cooling box body, of each semiconductor refrigeration sheet, and a radiator and a radiating fan are sequentially arranged on one side, facing the outside of the cooling box body, of each semiconductor refrigeration sheet.

Preferably, the cooling section is provided with three semiconductor refrigerators, and the three semiconductor refrigerators are distributed at intervals along the circumferential direction of the cooling box body.

Preferably, the first heat-insulating gasket, the second heat-insulating gasket, the third heat-insulating gasket and the fourth heat-insulating gasket are asbestos gaskets and have a thickness of 3-5 mm.

Preferably, the auger blade comprises a forward rotation auger and a reverse rotation auger which are respectively positioned at two sides of the discharge port.

Preferably, the feeding shell is of a sandwich structure and comprises an outer wall and an inner wall, and an aerogel layer and an aluminum oxide heat-insulating blanket layer are sequentially clamped between the outer wall and the inner wall.

Advantageous effects

The invention realizes the direct connection of the output shaft of the motor reducer and the auger main shaft, and has simple and compact integral structure.

According to the invention, the heat insulation section and the cooling section are arranged between the high-temperature feeding section and the motor reducer, so that the normal work of the motor reducer can be ensured without water cooling, the structure is simple and reliable, the energy is saved, and the operation cost is low.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an enlarged view of the section of FIG. 1;

FIG. 3 is a schematic view of the assembled structure of the semiconductor cooler portion of the present invention;

the labels in the figure are: 1. the device comprises a bearing end cover, 2, a first bearing seat, 3, a first bearing, 4, a packing auger main shaft, 5, a reverse-rotation packing auger, 6, an outer wall, 7, an aerogel layer, 8, an alumina heat insulation blanket layer, 9, an inner wall, 10, a forward-rotation packing auger, 11, a feeding port, 12, a fourth heat insulation gasket, 13, a second bearing seat, 14, a second bearing, 15, a heat insulation box body, 16, a coupler, 17, a third heat insulation gasket, 18, an output shaft, 19, a second heat insulation gasket, 20, a cooling box body, 21, a semiconductor refrigerator, 22, a first heat insulation gasket, 23, a motor reducer, 24, a cooling section, 25, a heat insulation section, 26, a high-temperature feeding section, 27, a discharging port, 28, a temperature controller, 29, a temperature sensor, 30, a cooling fan, 31, a cold guiding device, 32, a semiconductor refrigerating sheet, 33, a radiator, 34 and a.

Detailed Description

As shown in fig. 1, the high-temperature screw feeder of the present invention includes a motor reducer 23, a cooling section 24, a heat insulation section 25, and a high-temperature feeding section 26, which are connected in sequence from left to right. An output shaft 18 of the motor reducer 23 penetrates through the cooling section 24 and then is connected with the packing auger main shaft 4 in the high-temperature feeding section 26 in the heat insulation section 25 through the coupling 16.

As shown in fig. 2:

the cooling section 24 mainly functions to absorb heat transferred from the high-temperature feeding section 26 through the heat insulation section 25 by adopting a refrigeration method, and the temperature of the cooling section 24 and the temperature of the output shaft 18 are controlled to be about room temperature. The cooling section 24 comprises a cooling box body 20, a temperature sensor 29 arranged in the inner cavity of the cooling box body 20, a semiconductor refrigerator 21 arranged on the wall of the cooling box body 20 and a temperature controller 28 arranged outside the cooling box body 20, wherein a first heat insulation gasket 22 is arranged between the cooling box body 20 and the motor reducer 23 in a clamping mode, and a second heat insulation gasket 19 is arranged between the cooling box body 20 and the heat insulation section 25 in a clamping mode. The signal output of the temperature sensor 29 is connected to the temperature controller 28, the signal output of the temperature controller 28 is connected to the semiconductor refrigerator 21, and the temperature signal measured by the temperature sensor 29 can be used to control the on/off of the semiconductor refrigerator 21 by the temperature controller 28. The temperature controller 28 detects the temperature of the cooling box 20 through the temperature sensor 29, and starts the semiconductor refrigerator 21 to operate to lower the temperature of the cooling box 20 when the temperature is higher than a set value (e.g., 25 ℃); when the temperature is lower than the set value, the semiconductor refrigerator 21 is turned off, and closed-loop control of the temperature of the cooling box 20 is realized.

As shown in fig. 3, the semiconductor cooler 21 is mainly composed of a semiconductor cooling fin 32, a heat sink 33, a heat radiation fan 34, a cold conductor 31, a cooling fan 30, and the like. The semiconductor refrigerator 21 performs refrigeration by using a thermoelectric effect of the semiconductor refrigeration sheet 32, after the semiconductor refrigeration sheet 32 is powered on, one side of the cold end absorbs heat to the outside, and cold air is blown into the cooling box body 20 through the cold guider 31 and the cooling fan 30 to reduce the temperature of the cooling box body 20. The hot side temperature rises and the hot air is discharged to the outside air through the radiator 33 and the radiator fan 34. The semiconductor refrigerator 21 does not need a refrigerant, has the characteristics of small volume, light weight and the like, works reliably, is simple and convenient to operate, and is convenient for adjusting the refrigeration temperature.

In the present embodiment, the cooling section 24 has three semiconductor refrigerators 21 therein, and the three semiconductor refrigerators 21 are spaced apart from each other in the circumferential direction of the cooling box 20. The cooling box 20 is connected to a motor reducer 23 through a first heat insulating spacer 22. The first heat-insulating pad 22 is made of asbestos or ceramic fiber board with a thickness of 3mm, and the heat transferred from the high-temperature end is further reduced. The semiconductor refrigerator 21 selects a TEC1-12706 refrigerating sheet with rated voltage of 12V, refrigerating power of 58W-65W and temperature range of-55-83 ℃. The heat quantity transferred from the high-temperature feeding section 26 to the cooling section 24 is estimated to be about 146W, the refrigerating power of the three semiconductor refrigerators 21 is 174W, and the heat quantity transferred from the high-temperature section can be absorbed and cooled to ensure the normal operation of the motor reducer 23. The temperature controller 28 is selected from a creative E-1000 type, and an NTC temperature sensor 29 is arranged in the cooling box body 20 and can detect the temperature of the cooling box body 20. The three switching value outputs of the temperature controller 28 are respectively connected to the three semiconductor refrigerators 21, and the on-off of the three semiconductor refrigerators 21 can be controlled according to the difference between the set temperature and the actual detected temperature, so that the closed-loop control of the temperature of the cooling box 20 is realized.

The heat insulation section 25 is mainly used for connecting the output shaft 18 of the motor reducer 23 and the auger spindle 4 of the spiral auger to transmit power, and meanwhile, heat insulation measures are adopted to reduce the heat transmission of the high-temperature material feeding section 26 to one side of the motor reducer 23. The heat insulation section 25 comprises a heat insulation box body 15, a coupler 16 is arranged in the inner cavity of the heat insulation box body 15 and is provided with a third heat insulation gasket 17 used for separating heat transfer between the auger spindle 4 and the output shaft 18, and a fourth heat insulation gasket 12 is clamped between the heat insulation box body 15 and the high-temperature feeding section 26. The heat of the high-temperature material conveying section 26 is transferred to one side of the motor reducer 23 mainly by means of heat conduction, and can be transferred through the packing auger spindle 4 on one hand and the shell of the high-temperature material conveying section 26 on the other hand. The use of an insulated coupling 16, i.e. a third insulating gasket 17 (e.g. an asbestos gasket) in the middle of the coupling 16, reduces the heat transfer from the auger shaft 4. The fourth heat-insulating gasket 12 (such as asbestos gasket) is added at the connecting flange of the high-temperature feeding section 26 and the heat-insulating section 25 and the connecting flange of the heat-insulating section 25 and the cooling section 24, so that the heat transferred by the shell of the high-temperature feeding section 26 can be reduced. The length of the heat insulation section 25, the thickness and the material of the heat insulation gasket are adjusted, namely, the thermal resistance between the high-temperature feeding section 26 and the motor reducer 23 is controlled, so that the heat transferred to the cooling section 24 is less than about 150W.

In the embodiment, the heat insulation box body 15 and the coupling 16 can be made of steel with a small heat conductivity coefficient, such as 304 stainless steel with a heat conductivity coefficient of 16W/m.K; the third insulating mat 17, the second insulating mat 19 and the fourth insulating mat 12 can be made of a heat insulating material having a small thermal conductivity, for example, an asbestos board or a ceramic fiber board having a thermal conductivity of 0.17W/m.K, and have a thickness of 5 mm.

The main function of the high temperature feed section 26 is to transfer high temperature material up to 1050 ℃ from the feed inlet 11 to the discharge outlet 27. The high-temperature feeding section 26 comprises a feeding shell, a feeding port 11 and a discharging port 27 are respectively arranged at two ends of the feeding shell, and two ends of the auger spindle 4 are respectively rotatably arranged in bearing seats at corresponding end parts of the feeding shell. The auger spindle 4 on the right side of the discharge port 27 is welded with the forward-rotating auger 10 which can forward push high-temperature materials entering from the feed port 11. The auger spindle 4 on the right side of the discharge port 27 is welded with the reverse rotation auger 5, which can prevent the materials from being continuously pushed forward and reversely push the materials to flow out from the discharge port 27. The feeding shell is of a sandwich structure and comprises an outer wall 6 and an inner wall 9, and an aerogel layer 7 and an alumina heat-insulating blanket layer 8 are sequentially clamped between the outer wall 6 and the inner wall 9. In order to meet the high-temperature environment, parts of a bearing end cover 1, a first bearing seat 2 on the left side, an auger main shaft 4, a reverse-rotation auger 5, an inner wall 9, a forward-rotation auger 10, a feeding port 11, a second bearing seat 13 on the right side, a discharging port 27 and the like in the figure 2, which are in contact with materials, are made of 310 high-temperature stainless steel (capable of resisting 1150 ℃ high temperature). The first bearing 3 and the second bearing 14 for supporting the rotation of the auger main shaft 4 are both made of alumina ceramic bearings (capable of resisting 1200 ℃ of high temperature). The inner wall 9 is made of 310 stainless steel, the aerogel layer 7 between the inner wall 9 and the outer wall 6 is made of alumina fiber reinforced silica aerogel composite material, the alumina heat insulation blanket layer 8 is made of alumina fiber, the using temperature is 1300-1400 ℃, and the heat conductivity coefficient is 0.17W/m.K, so that the heat inside the feeding section is prevented from being dissipated outwards, and the temperature of the high-temperature material is kept.

According to the invention, the output shaft 18 of the motor reducer 23 is directly connected with the auger main shaft 4 of the auger, mechanical parts such as the auger of the high-temperature feeding section 26 and the like are made of high-temperature 310 stainless steel, the bearings are made of alumina ceramic bearings, and the feeding shell is made of a heat insulation layer, so that the conveying of high-temperature materials at 1050 ℃ can be realized. The invention arranges the heat insulation section 25 and the cooling section 24 between the high-temperature feeding section 26 and the motor reducer 23, can ensure the normal work of the motor reducer 23 without water cooling, has simple and reliable structure, saves energy and has low operation cost.

Claims

1. A high temperature screw feeder characterized by: the device comprises a motor reducer (23), a cooling section (24), a heat insulation section (25) and a high-temperature material conveying section (26) which are connected in sequence, wherein an output shaft (18) of the motor reducer (23) penetrates through the cooling section (24) and then is connected with a packing auger main shaft (4) in the high-temperature material conveying section (26) in the heat insulation section (25) through a coupling (16);

the cooling section (24) comprises a cooling box body (20), a temperature sensor (29) arranged in an inner cavity of the cooling box body (20), a semiconductor refrigerator (21) arranged on the wall of the cooling box body (20) and a temperature controller (28) arranged outside the cooling box body (20), a first heat insulation gasket (22) is clamped between the cooling box body (20) and the motor reducer (23), a second heat insulation gasket (19) is clamped between the cooling box body (20) and the heat insulation section (25), the signal output of the temperature sensor (29) is connected with the temperature controller (28), the signal output of the temperature controller (28) is connected with the semiconductor refrigerator (21), and the temperature signal measured by the temperature sensor (29) can be used for controlling the on-off of the semiconductor refrigerator (21) by the temperature controller (28);

the heat insulation section (25) comprises a heat insulation box body (15), the coupler (16) is arranged in an inner cavity of the heat insulation box body (15) and is provided with a third heat insulation gasket (17) for separating heat transfer between the packing auger main shaft (4) and the output shaft (18), and a fourth heat insulation gasket (12) is clamped between the heat insulation box body (15) and the high-temperature feeding section (26);

the high-temperature feeding section (26) comprises a feeding shell, a feeding port (11) and a discharging port (27) are respectively arranged at two ends of the feeding shell, two ends of the packing auger main shaft (4) are respectively rotatably arranged in bearing seats at corresponding end parts of the feeding shell, and packing auger blades are arranged on the packing auger main shaft (4).

2. A high temperature screw feeder as claimed in claim 1, wherein: the semiconductor refrigerator (21) comprises semiconductor refrigerating sheets (32) fixed on the wall of the cooling box body (20), a cold guide device (31) and a cooling fan (30) are sequentially arranged on one side, facing the inner cavity of the cooling box body (20), of the semiconductor refrigerating sheets (32), and a radiator (33) and a radiating fan (34) are sequentially arranged on one side, facing the outside of the cooling box body (20), of the semiconductor refrigerating sheets (32).

3. A high temperature screw feeder as claimed in claim 2, wherein: the cooling section (24) is internally provided with three semiconductor refrigerators (21), and the three semiconductor refrigerators (21) are distributed at intervals along the circumferential direction of the cooling box body (20).

4. A high temperature screw feeder as claimed in claim 1, wherein: the first heat insulation gasket (22), the second heat insulation gasket (19), the third heat insulation gasket (17) and the fourth heat insulation gasket (12) are asbestos gaskets, and the thickness of the asbestos gaskets is 3-5 mm.

5. A high temperature screw feeder as claimed in claim 1, wherein: the screw blade comprises a forward rotation screw (10) and a reverse rotation screw (5) which are respectively positioned at the two sides of the discharge hole (27).

6. A high temperature screw feeder as claimed in claim 1, wherein: the feeding shell is of a sandwich structure and comprises an outer wall (6) and an inner wall (9), and an aerogel layer (7) and an alumina heat-insulating blanket layer (8) are sequentially clamped between the outer wall (6) and the inner wall (9).