Scraper type film evaporation device

Abstract

The utility model provides a scraper type film evaporation device which comprises a barrel, a heating device is fixed to the outer wall of the barrel, a support is fixed to the heating device, a barrel cover is detachably fixed to the upper end of the barrel, a motor is installed at the upper end of the barrel cover, an exhaust pipe and a feeding pipe are connected to the side wall of the barrel, and the exhaust pipe and the feeding pipe are connected to the outer wall of the barrel. A discharging opening is formed in the bottom of the barrel, the motor is fixedly connected with a first rotating shaft extending into the barrel, a distributing device located on the side of the feeding pipe is fixed to the first rotating shaft, a second rotating shaft rotationally connected with the barrel is inserted into the lower end of the first rotating shaft, and the first rotating shaft can drive the second rotating shaft to rotate; and a mounting frame is fixed to the second rotating shaft, a plurality of annularly-distributed scraping plates are connected to the mounting frame in an inserted mode, and the upper ends of the scraping plates are detachably and fixedly connected with the mounting frame. The scraper can be directly replaced in the cylinder, the scraper is convenient to maintain and replace, and the replacement efficiency of the scraper can be improved.

Description

Technical Field

[0001] The present application relates to evaporation technology, and particularly to a scraping thin-film evaporation device. Background Art

[0002] In the production process of 1,4-butanediol, a scraping thin-film evaporation device is usually used to evaporate and concentrate materials. Currently, a commonly used scraping thin-film evaporation device includes a cylinder body, a heating device is sleeved on the cylinder body, a cylinder cover is detachably fixed to the upper end of the cylinder body, a motor is fixed to the upper end of the cylinder cover, a rotating shaft connected to the motor is arranged inside the cylinder body, a distributor and a mounting frame are sequentially fixed on the rotating shaft from top to bottom, and a plurality of uniformly distributed scrapers are fixed on the mounting frame. When in use, the material falls on the distributor, and at the same time, the rotating shaft drives the distributor to rotate. The distributor throws the material towards the inner wall of the cylinder body. The material flows downward along the inner wall of the cylinder body, and the flowing material is scraped into a thin film by the scraper. The thin film is evaporated by heating through the cylinder wall, the gas is discharged from the upper part of the cylinder body, and the evaporated material flows into the bottom of the cylinder body and is discharged from the discharge port at the bottom.

[0003] Currently, during the use of the existing scraping thin-film evaporation device, the rotation speed of the scraper is relatively fast, and the scraper is prone to damage after being used for a certain period of time. Therefore, the scraper needs to be maintained and replaced regularly. However, when the existing scraper is maintained and replaced, since the distributor and the scraper are fixed on the same rotating shaft, the distributor is located above the scraper, and the distributor blocks the scraper. Moreover, the rotating shaft is rotatably connected to the cylinder cover through a bearing. Therefore, the distributor, the rotating shaft, the mounting frame and the scraper need to be integrally removed from the cylinder body through the cylinder cover before the scraper can be replaced, resulting in a complex operation process for the entire replacement process, which is time-consuming and laborious. Summary of the Utility Model

[0004] The present application provides a scraping thin-film evaporation device to solve the problem that the entire replacement process of the existing scraping thin-film evaporation device is complex, time-consuming and laborious when replacing the scraper.

[0005] The present application provides a scraping thin-film evaporation device, which includes a cylinder body, a heating device is fixed on the outer wall of the cylinder body, the heating device is fixed with a bracket, a cylinder cover is detachably fixed to the upper end of the cylinder body, a motor is installed on the upper end of the cylinder cover, an exhaust pipe and a feed pipe are connected to the side wall of the cylinder body, and a discharge port is arranged at the bottom of the cylinder body;

[0006] The motor is fixedly connected with a first rotating shaft extending into the cylinder body, and a distributor is fixed on the first rotating shaft on the side of the feed pipe;

[0007] The lower end of the first rotating shaft is inserted with a second rotating shaft rotatably connected to the cylinder body, and the first rotating shaft can drive the second rotating shaft to rotate. An installation frame is fixed on the second rotating shaft, a plurality of annularly distributed scrapers are inserted on the installation frame, and the upper end of the scraper is detachably and fixedly connected to the installation frame.

[0008] Optionally, the second rotating shaft includes a cylindrical shaft, and a plug shaft concentric with the cylindrical shaft is fixed at the upper end of the cylindrical shaft. The plug shaft is in the shape of a regular hexagonal prism;

[0009] A jack adapted to the plug shaft is formed at the lower end of the first rotating shaft, and the plug shaft is inserted into the jack;

[0010] The mounting bracket is fixed on the cylindrical shaft.

[0011] Optionally, the upper end of the plug shaft extends to the top of the cylinder.

[0012] Optionally, the mounting bracket includes a frame body fixed on the cylindrical shaft. A plurality of slots equal in number to the number of scraping plates and distributed in a ring shape are fixed on the frame body. The slots are hollow structures with one side end and the upper end open, and the side opening ends of the slots face the inner wall of the cylinder;

[0013] The scraping plates are inserted into the slots and contact the inner walls of the slots, and the upper ends of the scraping plates are detachably and fixedly connected to the slots.

[0014] Optionally, the slots are in a rectangular structure, and limiting strips are fixed on two inner walls of the slots perpendicular to the side opening ends of the slots. Two grooves corresponding to the two limiting strips one by one and adapted to the grooves are formed on the scraping plates;

[0015] After the scraping plates are inserted into the slots, each limiting strip is inserted into the corresponding groove.

[0016] Optionally, a through hole is formed at one end of the slot perpendicular to the side opening end of the slot, and a blind hole concentric with the through hole is formed on the inner wall of the other end of the slot perpendicular to the side opening end of the slot, and the inner diameter of the blind hole is equal to the inner diameter of the through hole;

[0017] An internally threaded sleeve communicated with and concentric with the through hole is fixed on the outer wall of the slot. The internally threaded sleeve is engaged with a locking bolt having an outer diameter equal to that of the through hole, and the locking bolt can penetrate through the through hole and the scraping plate and extend into the blind hole at the same time.

[0018] Optionally, a handle is fixed at the upper end of the scraping plate.

[0019] Compared with the prior art, the beneficial effects of the present application are:

[0020] The scraping thin-film evaporation device provided by the present application has a cylinder cover detachably fixed to the upper end of the cylinder body. A motor is installed on the upper end of the cylinder cover. The motor is fixedly connected to a first rotating shaft extending into the cylinder body. A distributor is fixed on the first rotating shaft and is located on the side of the feed pipe. The lower end of the first rotating shaft is inserted into a second rotating shaft rotatably connected to the cylinder body, and the first rotating shaft can drive the second rotating shaft to rotate. An installation frame is fixed on the second rotating shaft. A plurality of annularly distributed scrapers are inserted into the installation frame, and the upper end of the scraper is detachably and fixedly connected to the installation frame. When replacing the scraper, first remove the cylinder cover, and then move the cylinder cover upward. After the cylinder cover moves upward, the cylinder cover drives the motor, the first rotating shaft, and the distributor to move upward synchronously with it. When the first rotating shaft completely moves out of the cylinder body and the cylinder cover is placed on the support, the scraper can be disassembled in the cylinder body to perform the replacement work of the scraper. Therefore, compared with the existing scraper replacement method, the replacement work of the scraper can be directly carried out in the cylinder body without removing the scraper, the installation frame, and the second rotating shaft from the cylinder body. This not only facilitates the maintenance and replacement of the scraper but also improves the replacement efficiency of the scraper. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a front view structural schematic diagram of the scraping thin-film evaporation device provided by the embodiment of the present application;

[0023] Figure 2 It is a partial front view sectional structural schematic diagram of the scraping thin-film evaporation device provided by the embodiment of the present application;

[0024] Figure 3 It is a partial exploded structural schematic diagram of the scraping thin-film evaporation device provided by the embodiment of the present application;

[0025] Figure 4 It is a partial top view structural schematic diagram of the scraping thin-film evaporation device provided by the embodiment of the present application;

[0026] Figure 5 It is a partial top view sectional structural schematic diagram of the scraping thin-film evaporation device provided by the embodiment of the present application.

[0027] Description of reference numerals: cylinder body 1, heating device 2, support 3, support plate 31, support leg 32, support member 4, cylinder cover 5, motor 6, exhaust pipe 7, feed pipe 8, discharge port 9, first rotating shaft 10, jack 101, distributor 11, second rotating shaft 12, cylindrical shaft 121, plug shaft 122, support frame 13, mounting frame 14, frame body 141, slot 142, limiting strip 143, through hole 144, blind hole 145, scraper 15, groove 151, internal thread sleeve 16, locking bolt 17, handle 18. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts also belong to the scope of protection of the present application.

[0029] As Figures 1-5 shown:

[0030] A scraper-type thin-film evaporation device provided by an embodiment of the present application includes a cylinder body 1, and a heating device 2 is fixed on the outer wall of the cylinder body 1. The heating device 2 adopts an evaporation heating device 2 with an annular structure, and the heating device 2 is sleeved and fixed on the outer wall of the cylinder body 1 to heat the cylinder wall of the cylinder body 1.

[0031] The heating device 2 is fixed with a support 3. The support 3 includes a support plate 31. Support legs 32 are fixed at the four corners of the lower end of the support plate 31. An installation hole penetrating up and down is formed in the support plate 31. A plurality of annularly distributed support members 4 are fixed on the outer wall of the annular sleeve, and all the support members 4 are fixedly connected to the upper end of the support plate 31 at the same time, and the annular sleeve penetrates through the installation hole, so as to support the heating device 2 and the cylinder body 1.

[0032] Further, in order to facilitate the staff to stand on the support plate 31 to replace the scraper 15, a ladder (not shown in the figure) is fixedly connected to the support plate 31.

[0033] The upper end of the cylinder body 1 is detachably fixed with a cylinder cover 5 by bolts. A motor 6 is fixedly installed on the upper end of the cylinder cover 5. An exhaust pipe 7 and a feed pipe 8 are connected to the side wall of the cylinder body 1. The exhaust pipe 7 is located at the top of the cylinder body 1, and a discharge port 9 is provided at the bottom of the cylinder body 1.

[0034] The motor 6 is fixedly connected with a first rotating shaft 10 extending into the cylinder body 1. Specifically, the output shaft of the motor 6 is fixedly connected with the upper end of the first rotating shaft 10 through a coupling, and the first rotating shaft 10 penetrates through the cylinder cover 5 and is rotatably connected with the cylinder cover 5 through a bearing to improve the stability of the rotation of the first rotating shaft 10. A distributor 11 is fixed on the first rotating shaft 10 and located on the side of the feed pipe 8.

[0035] The lower end of the first rotating shaft 10 is inserted with a second rotating shaft 12 rotatably connected with the cylinder body 1, and the first rotating shaft 10 can drive the second rotating shaft 12 to rotate. Specifically, the lower end of the second rotating shaft 12 is rotatably connected with a support frame 13, and the support frame 13 is fixedly connected with the inner wall of the cylinder body 1 to support the second rotating shaft 12.

[0036] A mounting frame 14 is fixed on the second rotating shaft 12, and a plurality of scraping plates 15 distributed in a ring are inserted on the mounting frame 14, and the upper end of the scraping plate 15 is detachably and fixedly connected with the mounting frame 14.

[0037] In this embodiment, the steam heating device 2 and the distributor 11 both adopt existing technologies and will not be described in detail.

[0038] During use, first start the heating device 2 to preheat the cylinder wall and heat the cylinder wall, then start the motor 6. The motor 6 drives the first rotating shaft 10 to rotate, and the first rotating shaft 10 drives the distributor 11 and the second rotating shaft 12 to rotate synchronously with it. The second rotating shaft 12 drives all the scraping plates 15 to rotate synchronously with it through the mounting frame 14. Then the material to be evaporated falls from the feed pipe 8 onto the distributor 11, and the distributor 11 rotates to throw the material towards the inner wall of the cylinder body 1. The material flows downward along the inner wall of the cylinder body 1, and the rotating scraping plates 15 scrape the flowing material into a thin film. The thin film is evaporated by heating the cylinder wall, and the gas is discharged from the exhaust pipe 7. The evaporated material flows into the bottom of the cylinder body 1 and is discharged from the discharge port 9 at the bottom.

[0039] When it is necessary to replace the scraping plate 15, first remove the cylinder cover 5, and then move the cylinder cover 5 upward. After the cylinder cover 5 is moved upward, the cylinder cover 5 drives the motor 6, the first rotating shaft 10 and the distributor 11 to move upward synchronously with it, and the first rotating shaft 10 is disengaged from the second rotating shaft 12. When the first rotating shaft 10 completely moves out of the cylinder body 1, place the cylinder cover 5 on the support plate 31. At this time, there is no obstruction above the scraping plate 15, and the scraping plate 15 is removed inside the cylinder body 1 to perform the replacement work of the scraping plate 15. After the replacement is completed, insert the first rotating shaft 10 into the second rotating shaft 12, and finally fixedly connect the cylinder cover 5 with the cylinder body 1.

[0040] The scraping thin-film evaporation device provided in this embodiment has a cylinder cover 5 detachably fixed to the upper end of the cylinder body 1. A motor 6 is installed on the upper end of the cylinder cover 5. The motor 6 is fixedly connected to a first rotating shaft 10 extending into the cylinder body 1. A distributor 11 is fixed on the first rotating shaft 10 and located on the side of the feed pipe 8. The lower end of the first rotating shaft 10 is inserted with a second rotating shaft 12 rotatably connected to the cylinder body 1, and the first rotating shaft 10 can drive the second rotating shaft 12 to rotate. An installation frame 14 is fixed on the second rotating shaft 12. A plurality of annularly distributed scrapers 15 are inserted into the installation frame 14, and the upper end of the scraper 15 is detachably and fixedly connected to the installation frame 14. When replacing the scraper 15, it is only necessary to remove the motor 6, the first rotating shaft 10, and the distributor 11 from the cylinder body 1 through the cylinder cover 5, and then the replacement work of the scraper 15 can be carried out inside the cylinder body 1. It is not necessary to remove the scraper 15, the installation frame 14, and the second rotating shaft 12 from the cylinder body 1. This not only facilitates the maintenance and replacement of the scraper 15 but also improves the replacement efficiency of the scraper 15.

[0041] In some embodiments of the present application, the second rotating shaft 12 includes a cylindrical shaft 121. A plug shaft 122 concentric with it is fixed to the upper end of the cylindrical shaft 121. The plug shaft 122 is in the shape of a regular hexagonal prism. A jack 101 adapted to the plug shaft 122 is opened at the lower end of the first rotating shaft 10. The plug shaft 122 is inserted into the jack 101, thus realizing the insertion effect between the first rotating shaft 10 and the second rotating shaft 12. The installation frame 14 is fixed on the cylindrical shaft 121.

[0042] Furthermore, the lower end of the cylindrical shaft 121 is rotatably connected to the support frame 13 through a bearing.

[0043] In this embodiment, in order to improve the stability of the first rotating shaft 10, the cylindrical shaft 121 and the connecting shaft are integrally formed.

[0044] In some embodiments of the present application, the upper end of the plug shaft 122 extends to the top of the cylinder body 1, which is convenient for the staff to align the jack 101 with the plug shaft 122 and facilitates inserting the first rotating shaft 10 onto the second rotating shaft 12.

[0045] In some embodiments of the present application, the installation frame 14 includes a frame body 141 fixed on the cylindrical shaft 121. A plurality of slots 142 equal in number to the scrapers 15 and annularly distributed are fixed on the frame body 141. The slots 142 are hollow structures with one side end and the upper end open, and the side opening end of the slots 142 faces the inner wall of the cylinder body 1.

[0046] The scraper 15 is inserted into the slot 142 and contacts the inner wall of the slot 142 to improve the stability of the scraper 15 inserted into the slot 142. The upper end of the scraper 15 is detachably and fixedly connected to the slot 142, which is convenient for the staff to disassemble the scraper 15 inside the cylinder body 1.

[0047] During use, the fixed connection between the upper end of the scraping plate 15 and the slot 142 is released, and the scraping plate 15 can be removed by pulling it upward. Then, a new scraping plate 15 is inserted into the slot 142, and the upper end of the new scraping plate 15 is fixedly connected to the slot 142.

[0048] In some embodiments of the present application, the slot 142 has a rectangular structure. Limiting bars 143 are fixedly provided on both inner walls of the slot 142 that are perpendicular to its side opening end. Two grooves 151 corresponding to and adapted to the two limiting bars 143 are formed on the scraping plate 15. After the scraping plate 15 is inserted into the slot 142, each limiting bar 143 is inserted into the corresponding groove 151, and the scraping plate 15 is limited, so that the scraping plate 15 can only move along the height direction of the slot 142, thereby improving the stability of the scraping plate 15 after being installed in the slot 142.

[0049] In some embodiments of the present application, a through hole 144 is formed at one end of the slot 142 that is perpendicular to its side opening end, and a blind hole 145 concentric with the through hole 144 is formed on the inner wall of the other end of the slot 142 that is perpendicular to its side opening end, and the inner diameter of the blind hole 145 is equal to the inner diameter of the through hole 144.

[0050] An internal thread sleeve 16 communicating with and concentric with the through hole 144 is fixedly provided on the outer wall of the slot 142. The internal thread sleeve 16 engages with a locking bolt 17 having an outer diameter equal to that of the through hole 144, and the locking bolt 17 can penetrate through the through hole 144 and the scraping plate 15 and extend into the blind hole 145.

[0051] During use, only by rotating the bolt can the fixed connection between the upper end of the scraping plate 15 and the slot 142 be realized, which has the effect of convenient operation.

[0052] In order to facilitate the extraction of the scraping plate 15 from the slot 142, in some embodiments of the present application, a handle 18 is fixedly provided at the upper end of the scraping plate 15.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A scraper-type thin film evaporation device, comprising a barrel (1), a heating device (2) is fixed to the outer wall of the barrel (1), a bracket (3) is fixed to the heating device (2), a barrel cover (5) is detachably fixed to the upper end of the barrel (1), a motor (6) is installed at the upper end of the barrel cover (5), an exhaust pipe (7) and a feed pipe (8) are connected to the side wall of the barrel (1), and a discharge port (9) is provided at the bottom of the barrel (1), characterized in that: The motor (6) is fixedly connected to a first rotating shaft (10) extending into the cylinder (1), and a distributor (11) located on the side of the feed pipe (8) is fixed to the first rotating shaft (10); A second rotating shaft (12) rotatably connected to the cylinder (1) is plugged into the lower end of the first rotating shaft (10), and the first rotating shaft (10) can drive the second rotating shaft (12) to rotate. A mounting frame (14) is fixed to the second rotating shaft (12), and a plurality of scrapers (15) distributed in an annular shape are plugged into the mounting frame (14), and the upper ends of the scrapers (15) are detachably fixedly connected to the mounting frame (14).

2. The scraped thin film evaporator according to claim 1, characterized in that: The second rotating shaft (12) comprises a cylindrical shaft (121), a plug-in shaft (122) concentric with the cylindrical shaft (121) being fixed at the upper end thereof, and the plug-in shaft (122) is in the shape of a regular hexagonal prism; The lower end of the first rotating shaft (10) is provided with a plug hole (101) adapted to the plug shaft (122), and the plug shaft (122) is plugged into the plug hole (101); The mounting frame (14) is fixed on the cylindrical shaft (121).

3. The scraped thin film evaporator according to claim 2, characterized in that: The upper end of the plug-in shaft (122) extends to the top of the cylinder (1).

4. The scraped thin film evaporator according to claim 2, characterized in that: The mounting frame (14) comprises a frame body (141) fixed on the cylindrical shaft (121), and slots (142) equal in number to the number of the scrapers (15) and distributed in an annular manner are fixed on the frame body (141), and the slots (142) are hollow structures with one side end and an upper end open, and the side open end of the slots (142) faces the inner wall of the cylinder (1); The scraper (15) is inserted into the slot (142) and contacts the inner wall of the slot (142), and the upper end of the scraper (15) is detachably fixedly connected to the slot (142).

5. The scraped thin film evaporator according to claim 4, characterized in that: The slot (142) is of a rectangular structure, and two inner walls of the slot (142) perpendicular to its side opening end are fixed with limit strips (143), and the scraper (15) is provided with two grooves (151) corresponding to and matching the two limit strips (143) in a one-to-one manner; After the scraper (15) is inserted into the slot (142), each limiting strip (143) is inserted into the corresponding groove (151).

6. The scraped thin film evaporator according to claim 5, characterized in that: A through hole (144) is formed at one end of the slot (142) perpendicular to its side opening end, and a blind hole (145) concentric with the through hole (144) is formed on the inner wall of the other end of the slot (142) perpendicular to its side opening end, and the inner diameter of the blind hole (145) is equal to the inner diameter of the through hole (144); An internal threaded sleeve (16) connected to and concentric with the through hole (144) is fixed on the outer wall of the slot (142); the internal threaded sleeve (16) is engaged with a locking bolt (17) having an outer diameter equal to that of the through hole (144); and the locking bolt (17) can simultaneously penetrate the through hole (144) and the scraper (15) and extend into the blind hole (145).

7. The scraped thin film evaporation device according to any one of claims 1 to 6, characterized in that: A handle (18) is fixed to the upper end of the scraper (15).

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