阅读说明：本技术 一种采用鼠笼式限位铰链刮板装置的薄膜蒸发器 (Thin film evaporator adopting squirrel-cage limiting hinge scraper device ) 是由 张金保 陆立 殷岐 胡国宏 王炜昕 于 2019-10-30 设计创作，主要内容包括：本发明涉及一种采用鼠笼式限位铰链刮板装置的薄膜蒸发器,其由电机组件、机架、主轴、筒体、封头和转子组成,所述转子包括鼠笼转子,所述鼠笼转子套装固定在主轴上,在鼠笼转子外壁上设有若干个沿着鼠笼转子长度方向等间距设置的鼠笼式限位铰链刮板装置,鼠笼式限位铰链刮板装置底部无底轴承,靠滑块运行稳定。所述鼠笼式限位铰链刮板装置由连接板、螺栓、连接块和刮板组成。本发明其结构刚性全面加强,能避免了需更换底轴承的麻烦,转子中采用带限位铰链刮板装置,其结构巧妙合理,能够适应在高黏度物料下也能高速、高效、可靠地完成蒸发过程且不会对物料产生污染,满足产品的工艺需求。(The invention relates to a film evaporator adopting a squirrel-cage limiting hinge scraper device, which consists of a motor component, a frame, a main shaft, a cylinder, an end enclosure and a rotor, wherein the rotor comprises a squirrel-cage rotor, the squirrel-cage rotor is sleeved and fixed on the main shaft, a plurality of squirrel-cage limiting hinge scraper devices are arranged on the outer wall of the squirrel-cage rotor at equal intervals along the length direction of the squirrel-cage rotor, and the bottom of the squirrel-cage limiting hinge scraper device is provided with a bottomless bearing and runs stably by a sliding block. The squirrel-cage limiting hinge scraper device consists of a connecting plate, a bolt, a connecting block and a scraper. The rotor has the advantages that the structural rigidity is comprehensively enhanced, the trouble that a bottom bearing needs to be replaced can be avoided, the rotor adopts the scraper plate device with the limiting hinge, the structure is ingenious and reasonable, the rotor can adapt to the situation that the evaporation process can be finished at high speed, efficiently and reliably under the condition of high-viscosity materials, the materials cannot be polluted, and the process requirements of products are met.)

1. A film evaporator adopting a squirrel-cage limiting hinge scraper device comprises a motor assembly (1), a rack (2), a main shaft (3), a cylinder (4), an end enclosure (5) and a rotor, wherein the top of the cylinder (4) is hermetically connected with the rack (2), the bottom of the cylinder (4) is hermetically connected with the end enclosure (5), and the main shaft (3) is supported and installed in the center position in the cylinder (4) through a bearing piece; the motor assembly (1) is arranged at the top of the frame (2), and a power output shaft of the motor assembly (1) is downwards connected with the upper end of the main shaft (3); the rotor is arranged on the main shaft (3), and is characterized in that: the rotor includes squirrel cage rotor (6), squirrel cage rotor (6) suit is fixed on main shaft (3), is equipped with the squirrel cage spacing hinge scraper means that a plurality of equidistant setting along squirrel cage rotor (6) length direction on squirrel cage rotor (6) outer wall, and the squirrel cage spacing hinge scraper means bottom does not have end bearing, and slider (13) set up between barrel (4) and head (5), and it is stable to lean on slider (13) to operate, the squirrel cage spacing hinge scraper means passes through main shaft (3) and drives the rotation.

2. A thin film evaporator using squirrel cage limited hinge scraper means as claimed in claim 1 wherein: the squirrel-cage limiting hinge scraper devices are identical in structure and consist of connecting plates (7), bolts (12), connecting blocks (8) and scrapers (10), the connecting plates (7) are welded and fixed on the outer wall of a squirrel-cage rotor, the connecting blocks (8) are fixed on the connecting plates (7) through the bolts (12), mounting grooves parallel to the axis of the squirrel-cage rotor (6) are formed in the outer side faces of the connecting blocks (8), the inner side edges of the scrapers (10) are mounted in the mounting grooves and connected through two connecting pins, and the scrapers (10) move in the connecting blocks (8) in the radial direction.

3. A thin film evaporator using squirrel cage limited hinge scraper means as claimed in claim 2 wherein: the outer side edge of the scraper (10) is attached to the inner wall of the barrel (4), the attachment gap can be adjusted, and the scraper (10) can be prevented from damaging the barrel wall.

4. A thin film evaporator using squirrel cage limited hinge scraper means as claimed in claim 2 wherein: the connecting pin mainly comprises a bolt (11) and a nut (9).

5. A thin film evaporator using squirrel cage limited hinge scraper means as claimed in claim 3 wherein: the joint clearance between the outer side edge of the scraper (10) and the inner wall of the cylinder (4) is less than 1 mm.

Technical Field

The invention relates to a film evaporator, in particular to a film evaporator adopting a squirrel-cage limiting hinge scraper device, and belongs to the field of special mechanical equipment for chemical engineering.

Background

The film evaporator is a device which is applied to the industries of petrochemical industry, pharmacy, food processing and the like and is used for removing volatile matters and distilling products from materials which are fed in liquid state, discharged in liquid state or solid state, and the like, can carry out falling film evaporation under the vacuum condition by forcibly forming a film through a rotary scraper, and is widely applied to the industries of chemical industry, petrifaction, medicine, pesticide, daily chemicals, food, fine chemical industry and the like. With the rapid development of the chemical industry, the development of newer equipment more suitable for the process is accelerated by chemical equipment, and a film evaporator involved in the evaporation process needs to be developed continuously.

The existing film evaporator mainly comprises a main shaft, a scraper device driven by the main shaft, a jacket, a cylinder, a seal head, a driving assembly and other parts. With the vigorous development of the evaporator distillation technology industry, the film evaporator is gradually enlarged, and the length of the main shaft is continuously lengthened, so that the problems of the strength and the rigidity of the main shaft are more obvious. The traditional design scheme is to adopt a hollow shaft to replace a solid shaft so as to reduce the shaft weight and effectively improve the critical rotating speed of a rotor, and solve the vibration problem of the shaft, so that the rotor device obtains a good stable operation effect. However, in actual production, due to the increase of material viscosity, the stress of the rotor is uneven in the rotating process, so that the main shaft is affected by eccentric force in the rotating process, the shaft is eccentric, the amplitude of the rotor is increased, the eccentric wear of the scraper is caused, and the normal operation of equipment is influenced. The novel rotor structure is searched for the large-scale film evaporator applied to high-viscosity materials, good rigidity and strength of the rotor are obtained, and the technical problem which is continuously solved by the development of the current film evaporator industry is solved.

In the thin film evaporator, a scraper device is a key device, and materials are forcedly formed into a film on the wall of the evaporator cylinder through the scraper device in the separation process of the materials entering equipment, so that the working process of falling film evaporation under a vacuum condition is realized. Therefore, whether the structural form of the scraper device is adapted to the process requirements or not becomes a key factor for determining the evaporation capacity of the equipment. For the current highly refined industry, the film evaporator with one structure can not be simply used for being suitable for various working conditions, but the film evaporator needs to be classified and designed according to different industries and different material characteristics.

The prior scraper device mainly has the following problems: 1. the conventional movable scraper is thin and cannot bear high rotating speed and large load; 2. the two ends of the conventional fixed scraper are supported by bearings, the bottom of the conventional fixed scraper is provided with the bearings, the relative stability of operation is poor, and the replacement of the bottom bearings is troublesome; 3. the conventional scraper can finish the evaporation process under high-viscosity materials, and has poor speed, efficiency and reliability and can pollute the materials.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the film evaporator adopting the squirrel-cage limiting hinge scraper device, which has the advantages of compact structure and reasonable design, can be adapted to high-speed, high-efficiency and reliable completion of an evaporation process under high-viscosity materials, does not pollute the materials, and meets the process requirements of products.

According to the technical scheme provided by the invention: a film evaporator adopting a squirrel-cage limiting hinge scraper device comprises a motor assembly, a rack, a main shaft, a cylinder, an end enclosure and a rotor, wherein the top of the cylinder is connected with the rack in a sealing manner, the bottom of the cylinder is connected with the end enclosure in a sealing manner, and the main shaft is supported and installed in the center of the cylinder through a bearing piece; the motor assembly is arranged at the top of the frame, and a power output shaft of the motor assembly is downwards connected with the upper end of the main shaft; the rotor is arranged on the main shaft, and is characterized in that: the rotor comprises a squirrel cage rotor, the squirrel cage rotor is sleeved and fixed on the main shaft, a plurality of squirrel cage type limit hinge scraper devices are arranged on the outer wall of the squirrel cage rotor at equal intervals along the length direction of the squirrel cage rotor, a bottomless bearing is arranged at the bottom of each squirrel cage type limit hinge scraper device, a sliding block is arranged between a cylinder body and an end enclosure and runs stably by virtue of the sliding block, and the squirrel cage type limit hinge scraper devices are driven to rotate by the main shaft.

As a further improvement of the invention, each squirrel-cage limiting hinge scraper device has the same structure and consists of a connecting plate, a bolt, a connecting block and a scraper, wherein the connecting plate is welded and fixed on the outer wall of the squirrel-cage rotor, the connecting block is fixed on the connecting plate through the bolt, the outer side surface of the connecting block is provided with an installation groove parallel to the axis of the squirrel-cage rotor, the inner side of the scraper is arranged in the installation groove and connected through two connecting pins, and the scraper moves in the connecting block in the radial direction.

As a further improvement of the invention, the outer side edge of the scraper is attached to the inner wall of the cylinder body, and the attachment gap can be adjusted, so that the growth of scales on the cylinder wall of materials can be effectively prevented, the scales can be scraped at the initial stage of formation, and the existing scales can be scraped in time. Simultaneously, the gap can be adjusted according to the material characteristics and the working condition, and the scraping plate is prevented from damaging the cylinder wall.

As a further improvement of the invention, the connecting pin mainly comprises a bolt and a nut, so that the scraper can be conveniently detached and replaced.

As a further improvement of the invention, the clearance between the outer side edge of the scraper and the inner wall of the cylinder body is less than 1 mm.

Compared with the prior art, the invention has the advantages that:

1) the structural rigidity of the mouse cage type limiting hinge scraper device is comprehensively enhanced, the bottom bearing is not arranged at the bottom of the mouse cage type limiting hinge scraper device, the mouse cage type limiting hinge scraper device runs stably by means of the sliding block, and the trouble that the bottom bearing needs to be replaced is avoided. After the welding of the squirrel-cage structure rotor is finished, 2) and the rotor adopt scraper devices with limiting hinges, the structure is ingenious and reasonable, the evaporation process can be finished at high speed, efficiently and reliably under high-viscosity materials, and the pollution to the materials is avoided.

Drawings

FIG. 1 is a front view of the structure of an embodiment of the present invention.

Fig. 2 is a top view of each squirrel cage check hinge scraper device.

Fig. 3 is a structural side view of each squirrel cage limit hinge scraper device.

Description of reference numerals: 1-motor component, 2-frame, 3-main shaft, 4-cylinder, 5-end enclosure, 6-squirrel cage rotor, 7-connecting plate, 8-connecting block, 9-nut, 10-scraper, 11-bolt pin, 12-bolt, 13-slide block.

Detailed Description

The invention is further illustrated by the following specific figures and examples.

As shown in fig. 1: the embodiment discloses a film evaporator adopting a squirrel-cage limiting hinge scraper device, which mainly comprises a motor component 1, a rack 2, a main shaft 3, a cylinder 4, an end enclosure 5 and a rotor, wherein the top of the cylinder 4 is hermetically connected with the rack 2, the bottom of the cylinder 4 is hermetically connected with the end enclosure 5, and the main shaft 3 is supported and installed at the central position in the cylinder 4 through a bearing piece; the motor assembly 1 is arranged at the top of the frame 2, and a power output shaft of the motor assembly 1 is downwards connected with the upper end of the main shaft 3; the rotor is arranged on the main shaft 3, and the squirrel-cage limiting hinge scraper device is driven to rotate by the main shaft 3.

As shown in fig. 1 ~ and fig. 3, in this embodiment, the rotor includes a cage rotor 6, the cage rotor 6 is fixed on the main shaft 3 in a sleeved manner, a plurality of cage-type limiting hinge scraper devices are arranged on the outer wall of the cage rotor 6 at equal intervals along the length direction of the cage rotor 6, the bottom of each cage-type limiting hinge scraper device is provided with a bottomless bearing, and the operation is stable by a sliding block 13, the sliding block 13 is arranged between the cylinder 4 and the end enclosure 5, and the operation is stable by the sliding block 13.

As shown in fig. 2 and 3, in this embodiment, each of the squirrel-cage limiting hinge scraper devices has the same structure, each of the squirrel-cage limiting hinge scraper devices is composed of a connecting plate 7, a bolt 12, a connecting block 8 and a scraper 10, the connecting plate 7 is welded and fixed on the outer wall of the squirrel-cage rotor, the connecting block 8 is fixed on the connecting plate 7 through the bolt 12, an installation groove parallel to the axis of the squirrel-cage rotor 6 is formed in the outer side surface of the connecting block 8, the inner side edge of the scraper 10 is installed in the installation groove and connected through two connecting pins, and the scraper 10 can slightly move in the connecting block 8 in the radial direction.

In this embodiment, the laminating between scraper blade 10 outside limit and the 4 inner walls of barrel can prevent effectively that the material from the increase of scale deposit on section of thick bamboo wall for scale deposit just can be scraped at the initial stage of formation, and carry out timely scraping to the scale deposit that exists. Meanwhile, the gap can be adjusted according to the physical properties and working conditions of the materials, so that the scraping plate 10 is prevented from damaging the cylinder wall. The clearance between the outer side edge of the scraper 10 and the inner wall of the cylinder body is smaller than 1 mm.

In the present embodiment, as shown in fig. 2 and 3, the connecting pin mainly comprises a bolt pin 11 and a nut 9, so that the scraper 10 can be easily removed and replaced.

The working principle and the working process of the invention are as follows:

when the evaporator works, materials enter a closed container of the cylinder body 4, the motor component 1 drives the shaft squirrel-cage limiting hinge scraper device to rotate through the main shaft 3, and under the high-speed rotation, the scraper 10 in the squirrel-cage limiting hinge scraper device is forced to form a film on the inner wall of the evaporator cylinder body 4, so that the working process is realized.

In the rotating process of the squirrel-cage limiting hinge scraper device, if the scraper 10 encounters scaling substances and is difficult to scrape the scaling substances at one time, the scraper 10 can rotate slightly in the radial direction to avoid the scaling substances, and at a high rotating speed, the subsequent scraper 10 can form a continuous scraping effect on the scaling substances and has good adaptability to the consolidation materials on the wall of the cylinder 4. In addition, when the squirrel-cage limiting hinge scraper device rotates, the sliding block at the bottom of the squirrel-cage limiting hinge scraper device slides along the inner wall of the film evaporator, so that the rotating vibration of the large-scale rotating frame is reduced, and the effect of stable operation of equipment is achieved.