Cooling crystallization device for urea resin production

Abstract

The utility model provides a cooling crystallization device for urea resin production, which comprises a bottom plate and is characterized in that a first vertical plate is fixedly mounted on the left side of the top of the bottom plate, a second vertical plate is fixedly mounted on the right side of the top of the bottom plate, a crystallization box is arranged at the top of the bottom plate, and a feeding valve is fixedly mounted at the top of the crystallization box; a discharging valve is fixedly installed at the bottom of the crystallization box, a scraping mechanism is arranged on the surface of a first vertical plate, scrapers are arranged on the outer sides of two movable plates, and by arranging the scraping mechanism, the situation that urea resin adheres to the inner wall of the crystallization box after being crystallized and cannot be completely scraped away by components such as scrapers can be effectively avoided, and the crystallization efficiency is improved. According to the present invention, the material waste caused by the residual of the resin in the inner cavity of the crystallization box can be avoided, and the scraper and the material scraping plate have the moving characteristic so as to avoid the poor resin strength caused by the scraping of the resin when the resin is not completely crystallized.

Description

Technical Field

[0001] The utility model relates to a cooling crystallization device for urea resin production, belonging to the technical field of crystallization devices. Background Art

[0002] Urea resin, also known as urea formaldehyde resin, is obtained by polycondensing urea and formaldehyde under the action of a catalyst to form an initial urea formaldehyde resin, and then forming an insoluble and infusible final thermosetting resin under the action of a curing agent or an auxiliary agent. The cured urea formaldehyde resin is lighter in color than phenolic resin, semi-transparent, resistant to weak acids and weak bases, has good insulation performance, excellent wear resistance, and is inexpensive. It is the most widely used variety in adhesives.

[0003] Chinese Patent Publication (Publication No.: CN 218166024 U) discloses a cooling crystallization device for urea production, which relates to the technical field of urea crystallization. It includes a base, on the top of which a box body is welded. Inside the left side of the box body, there is a crystallization drum. Inside the crystallization drum, a connecting cylinder is installed, and a spiral tube is wound around the outside of the connecting cylinder. The right end of the spiral tube is connected to a first connecting pipe, and the left end of the spiral tube is provided with a second connecting pipe. On the outside right side of the first connecting pipe, a second bevel gear is sleeved, and above the outside left side of the second bevel gear, a first bevel gear is installed in a mating manner. Inside the first bevel gear, a rotating shaft is connected. In the utility model, by injecting cooling water into the first connecting pipe, the cooling water can enter the inside of the spiral tube to cool the crystallization drum, and finally the cooling water is discharged through the second connecting pipe, so as to continuously cool the crystallization drum. The spiral tube is wound around the outside of the connecting cylinder, and the cooling contact surface is large, and the cooling effect is good.

[0004] Although the above device can collect the crystalline substances on the surface of the crystallization drum, due to the property of heat conduction of temperature, crystalline substances will also adhere to the inner cavity of the box body, resulting in incomplete collection of the crystallized urea resin. At the same time, since the scraper always adheres to the surface of the crystallization drum, the urea that has just solidified but whose inside has not been completely crystallized will also be scraped off. These incompletely crystallized urea resins may exhibit lower mechanical strength and hardness, resulting in easier degradation reaction of the resin during later use.

[0005] Therefore, a cooling crystallization device for urea resin production is proposed. Summary of the Utility Model

[0006] In view of this, the utility model provides a cooling crystallization device for urea resin production to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0007] The technical solution of the present utility model is realized as follows: A cooling crystallization device for urea resin production, including a bottom plate, characterized in that a first vertical plate is fixedly installed on the left side of the top of the bottom plate, a second vertical plate is fixedly installed on the right side of the top of the bottom plate, a crystallization box is arranged on the top of the bottom plate, a feed valve is fixedly installed on the top of the crystallization box, and a discharge valve is fixedly installed on the bottom of the crystallization box;

[0008] A scraping mechanism is arranged on the surface of the first vertical plate. The scraping mechanism includes an L-shaped rod and a moving plate. Both L-shaped rods are located on the upper and lower sides of the top of the crystallization box. Moving blocks are fixedly installed on the inner sides of both L-shaped rods. Both moving plates are located on the left and right sides of both moving blocks. Scraping knives are arranged on the outer sides of both moving plates.

[0009] Further preferably, a driving motor is fixedly installed on the top of the first vertical plate. The output end of the driving motor is fixedly connected with a bidirectional screw rod. Threaded blocks are threadedly connected to both the upper and lower sides of the surface of the bidirectional screw rod. The left sides of both L-shaped rods are fixedly connected to the right sides of both threaded blocks. Link rods are movably connected to the outer sides of both moving blocks. All four link rods are movably connected to the inner sides of both moving plates.

[0010] Further preferably, mounting bolts are threadedly connected to the surfaces of both scraping knives. The inner sides of the mounting bolts are threadedly connected to the inner surface of the moving plate.

[0011] Further preferably, scraping plates are fixedly installed on the surfaces of both L-shaped rods. The outer sides of the scraping plates are attached to the upper and lower sides of the inner cavity of the crystallization box.

[0012] Further preferably, notch openings are formed on both the upper and lower sides of the crystallization box. Both L-shaped rods penetrate through the inner cavities of both notch openings and extend into the inner cavity of the crystallization box.

[0013] Further preferably, limiting grooves are formed on both the upper and lower sides of the surface of the first vertical plate. The left sides of both threaded blocks are slidably connected to the inner cavities of both limiting grooves.

[0014] Further preferably, support frames are rotatably connected to both the upper and lower sides of the surface of the crystallization box through bearings. Both support frames are fixedly installed on the inner sides of the first vertical plate and the second vertical plate. A rotating motor is fixedly installed on the top of the support frame. The output end of the rotating motor is fixedly connected with a gear. A toothed ring is fixedly installed on the surface of the crystallization box. The surface of the gear meshes with the surface of the toothed ring.

[0015] Further preferably, a liquid inlet pipe is fixedly installed on the bottom of the bottom plate. The top end of the liquid inlet pipe is communicated with a cooling pipe. A cavity is formed on the inner surface of the bottom plate. The cooling pipe is fixedly installed in the inner cavity of the cavity.

[0016] Due to the adoption of the above technical solutions in the embodiments of the present utility model, it has the following advantages:

[0017] First, by setting up a scraping mechanism in the present utility model, through the output of the driving motor, the screw block drives the moving block to move outward, and causes the connecting rod to flip. At this time, the scraper and the scraping plate are respectively attached to the four sides and the upper and lower sides of the inner cavity of the crystallization tank. By the contact of the scraper and the scraping plate with the four sides and the upper and lower ends of the inner cavity of the crystallization tank respectively, it can effectively prevent the urea resin from sticking to the inner wall of the crystallization tank after crystallization, and parts such as the scraper cannot completely scrape it, resulting in its residue in the inner cavity of the crystallization tank, causing material waste. At the same time, due to the moving characteristics of both the scraper and the scraping plate, it can also avoid scraping the resin when it is not completely crystallized, resulting in the deterioration of the resin strength.

[0018] Second, by setting installation bolts in the present utility model, the scraper can be disassembled, which is convenient for replacement when the edge of the scraper becomes blunt after long-term use. By setting the scraping plate, scraping work can be carried out on the upper and lower sides of the inner cavity of the crystallization tank, reducing the residue of urea crystals in the inner cavity of the crystallization tank. By setting the notch, the movement of the L-shaped rod can be limited, avoiding the deviation of the L-shaped rod during movement, thus affecting the scraping work of the crystals in the inner cavity of the crystallization tank. By setting the limiting groove, the screw block can be limited, avoiding the screw block rotating synchronously with the bidirectional screw, thus affecting the scraping work of the crystal material in the inner cavity of the crystallization tank. By setting the rotating motor, the gear and the toothed ring, the crystallization tank can be rotated, so that through the rotation of the crystallization tank, the scraping plate and the scraper can scrape the crystal substances on the inner wall of the bottom plate. By setting the liquid inlet pipe and the cooling pipe, the temperature in the inner cavity of the bottom plate can be refrigerated, thus realizing the crystallization work of the resin in the inner cavity of the bottom plate.

[0019] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the above-described illustrative aspects, embodiments and features, further aspects, embodiments and features of the present utility model will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 use in the description of the embodiments or the prior art. Obviously, the following drawings are only 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.

[0021] Figure 1 It is a schematic front three-dimensional structure diagram of the present utility model;

[0022] Figure 2 is a schematic plan view of the present utility model;

[0023] Figure 3 is a schematic structural view of the scraping mechanism of the present utility model;

[0024] Figure 4 is a schematic internal structural view of the crystallization tank of the present utility model;

[0025] Figure 5 is the Figure 4 schematic enlarged structural view at position A of the present utility model.

[0026] Reference numerals: 1, bottom plate; 2, scraping mechanism; 201, driving motor; 202, bidirectional screw; 203, screw block; 204, L-shaped rod; 205, moving block; 206, connecting rod; 207, moving plate; 208, scraper; 209, mounting bolt; 210, scraping plate; 211, notch; 212, limiting groove; 3, first vertical plate; 4, second vertical plate; 5, crystallization tank; 6, feed valve; 7, discharge valve; 8, cavity; 9, liquid inlet pipe; 10, cooling pipe; 11, support frame; 12, rotating motor; 13, gear; 14, toothed ring. Detailed implementation manners

[0027] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0028] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0029] Embodiment 1

[0030] As Figures 1-5 shown, the embodiment of the present utility model provides a cooling crystallization device for urea resin production, including a bottom plate 1. It is characterized in that a first vertical plate 3 is fixedly installed on the left side of the top of the bottom plate 1, a second vertical plate 4 is fixedly installed on the right side of the top of the bottom plate 1, a crystallization tank 5 is arranged on the top of the bottom plate 1, a feed valve 6 is fixedly installed on the top of the crystallization tank 5, and a discharge valve 7 is fixedly installed on the bottom of the crystallization tank 5;

[0031] A scraping mechanism 2 is arranged on the surface of the first vertical plate 3. The scraping mechanism 2 includes an L-shaped rod 204 and a moving plate 207. Both L-shaped rods 204 are located on the upper and lower sides of the top of the crystallization tank 5. Moving blocks 205 are fixedly installed on the inner sides of both L-shaped rods 204. Both moving plates 207 are located on the left and right sides of both moving blocks 205. Scraping blades 208 are arranged on the outer sides of both moving plates 207. A driving motor 201 is fixedly installed on the top of the first vertical plate 3. The output end of the driving motor 201 is fixedly connected to a bidirectional screw 202. Threaded blocks 203 are threadedly connected to both the upper and lower sides of the surface of the bidirectional screw 202. The left sides of both L-shaped rods 204 are fixedly connected to the right sides of both threaded blocks 203. Connecting rods 206 are movably connected to the outer sides of both moving blocks 205. All four connecting rods 206 are movably connected to the inner sides of both moving plates 207. Mounting bolts 209 are threadedly connected to the surfaces of both scraping blades 208. The inner sides of the mounting bolts 209 are threadedly connected to the inner surfaces of the moving plates 207. Scraping plates 210 are fixedly installed on the surfaces of both L-shaped rods 204. The outer sides of the scraping plates 210 are attached to the upper and lower sides of the inner cavity of the crystallization tank 5. Notch openings 211 are formed on both the upper and lower sides of the crystallization tank 5. Both L-shaped rods 204 penetrate through the inner cavities of both notch openings 211 and extend into the inner cavity of the crystallization tank 5. Limiting grooves 212 are formed on both the upper and lower sides of the surface of the first vertical plate 3. The left sides of both threaded blocks 203 are slidably connected to the inner cavities of both limiting grooves 212.

[0032] By setting up the scraping mechanism 2, through the output of the driving motor 201, the screw block 203 drives the moving block 205 to move outward, and causes the connecting rod 206 to turn over. At this time, the scraper 208 and the scraping plate 210 are respectively attached to the four sides and the upper and lower sides of the inner cavity of the crystallization tank 5. By the contact of the scraper 208 and the scraping plate 210 with the four sides and the upper and lower ends of the inner cavity of the crystallization tank 5 respectively, it can effectively prevent the urea resin from sticking to the inner wall of the crystallization tank 5 after crystallization, and parts such as the scraper cannot completely scrape it, resulting in its residue in the inner cavity of the crystallization tank 5 and causing material waste. At the same time, because both the scraper 208 and the scraping plate 210 have the characteristic of moving, it can also avoid scraping the resin when it is not completely crystallized, resulting in the deterioration of the resin strength. By setting the mounting bolt 209, the scraper 208 can be disassembled, which is convenient for replacement when the edge position of the scraper 208 becomes blunt after long-term use. By setting the scraping plate 210, scraping work can be carried out on the upper and lower sides of the inner cavity of the crystallization tank 5, reducing the residue of urea crystals in the inner cavity of the crystallization tank 5. By setting the notch 211, the movement of the L-shaped rod 204 can be limited, avoiding the deviation of the L-shaped rod 204 during movement, thereby affecting the scraping work of the crystals in the inner cavity of the crystallization tank 5. By setting the limiting groove 212, the screw block 203 can be limited, avoiding the screw block 203 rotating synchronously with the bidirectional screw 202, thereby affecting the scraping work of the crystal material in the inner cavity of the crystallization tank 5.

[0033] Example 2

[0034] As Figure 1 、 Figure 2 and Figure 4 shown, in one embodiment, both the upper and lower sides of the surface of the crystallization tank 5 are movably connected to the support frames 11 through bearings. Both support frames 11 are fixedly installed inside the first vertical plate 3 and the second vertical plate 4. The top of the support frame 11 is fixedly installed with a rotating motor 12. The output end of the rotating motor 12 is fixedly connected with a gear 13. The surface of the crystallization tank 5 is fixedly installed with a toothed ring 14. The surface of the gear 13 meshes with the surface of the toothed ring 14. The bottom of the bottom plate 1 is fixedly installed with a liquid inlet pipe 9. The top end of the liquid inlet pipe 9 is communicated with a cooling pipe 10. A cavity 8 is opened on the inner surface of the bottom plate 1. The cooling pipe 10 is fixedly installed in the inner cavity of the cavity 8.

[0035] By setting the rotating motor 12, the gear 13 and the toothed ring 14, the crystallization tank 5 can be made to rotate, so that through the rotation of the crystallization tank 5, the scraping plate 210 and the scraper 208 can scrape the crystal substances on the inner wall of the bottom plate 1. By setting the liquid inlet pipe 9 and the cooling pipe 10, the temperature in the inner cavity of the bottom plate 1 can be refrigerated, so as to realize the crystallization work of the resin in the inner cavity of the bottom plate 1.

[0036] When the utility model works: First, urea resin is injected into the inner cavity of the crystallization tank 5 through the feed valve 6. Subsequently, cooling water is injected into the inner cavity of the cooling pipe 10 through the liquid inlet pipe 9. Through the conduction of heat, the cooling water cools the temperature in the inner cavity of the crystallization tank 5. Then, through the output of the rotating motor 12, the gear 13 and the toothed ring 14 cooperate with each other to drive the crystallization tank 5 to rotate, accelerating the crystallization of the urea resin in the inner cavity of the crystallization tank 5. When the urea resin in the inner cavity of the crystallization tank 5 is completely crystallized, through the output of the driving motor 201, the bidirectional screw 202 drives the screw block 203 and the L-shaped rod 204 to move synchronously outward. At this time, the moving block 205 moves outward following the L-shaped rod 204, causing the connecting rod 206 to flip. The moving plate 207 drives the scraper 208 to contact the inner wall of the crystallization tank 5. While the L-shaped rod 204 moves outward, the outer sides of the scraping plates 210 are respectively attached to the upper and lower sides of the inner wall of the crystallization tank 5. At this time, with the rotation of the crystallization tank 5, the crystalline substances are scraped off from the inner wall and the upper and lower ends of the crystallization tank 5. Due to the influence of their own weight, the scraped crystalline substances fall to the bottom of the inner cavity of the crystallization tank 5. Subsequently, the crystalline substances are discharged through the discharge valve 7, completing the crystallization work of the urea resin.

[0037] The above is only the specific implementation manner of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model can easily think of various changes or substitutions, and these should all be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A cooling crystallization device for urea resin production, comprising a bottom plate (1), characterized in that, On the left side of the top of the bottom plate (1), a first vertical plate (3) is fixedly installed. On the right side of the top of the bottom plate (1), a second vertical plate (4) is fixedly installed. On the top of the bottom plate (1), a crystallization tank (5) is arranged. On the top of the crystallization tank (5), a feed valve (6) is fixedly installed. On the bottom of the crystallization tank (5), a discharge valve (7) is fixedly installed. On the surface of the first vertical plate (3), a scraping mechanism (2) is arranged. The scraping mechanism (2) includes an L-shaped rod (204) and a moving plate (207). Both of the two L-shaped rods (204) are located on the upper and lower sides of the top of the crystallization tank (5). On the inner sides of both of the two L-shaped rods (204), a moving block (205) is fixedly installed. Both of the two moving plates (207) are located on the left and right sides of the two moving blocks (205). On the outer sides of both of the two moving plates (207), a scraping blade (208) is arranged.

2. The cooling crystallization device for urea resin production according to claim 1, wherein: On the top of the first vertical plate (3), a driving motor (201) is fixedly installed. The output end of the driving motor (201) is fixedly connected to a bidirectional screw rod (202). On the upper and lower sides of the surface of the bidirectional screw rod (202), a screw block (203) is threadedly connected. The left sides of both of the two L-shaped rods (204) are fixedly connected to the right sides of the two screw blocks (203). On the outer sides of both of the two moving blocks (205), a connecting rod (206) is movably connected. All of the four connecting rods (206) are movably connected to the inner sides of the two moving plates (207).

3. A cooling crystallization device for urea resin production according to claim 1, characterized in that: On the surfaces of both of the two scraping blades (208), a mounting bolt (209) is threadedly connected. The inner side of the mounting bolt (209) is threadedly connected to the inner surface of the moving plate (207).

4. A cooling crystallization device for urea resin production according to claim 1, characterized in that: On the surfaces of both of the two L-shaped rods (204), a scraping plate (210) is fixedly installed. The outer sides of the scraping plates (210) are attached to the upper and lower sides of the inner cavity of the crystallization tank (5).

5. A cooling crystallization device for urea resin production according to claim 1, characterized in that: On the upper and lower sides of the crystallization tank (5), a notch (211) is opened. Both of the two L-shaped rods (204) penetrate through the inner cavities of the two notches (211) and extend into the inner cavity of the crystallization tank (5).

6. The cooling crystallization device for urea resin production according to claim 2, characterized in that: On the upper and lower sides of the surface of the first vertical plate (3), a limiting groove (212) is opened. The left sides of both of the two screw blocks (203) are slidably connected to the inner cavities of the two limiting grooves (212).

7. A cooling crystallization device for urea resin production according to claim 1, characterized in that: On the upper and lower sides of the surface of the crystallization tank (5), a support frame (11) is movably connected through a bearing. Both of the two support frames (11) are fixedly installed on the inner sides of the first vertical plate (3) and the second vertical plate (4). On the top of the support frame (11), a rotating motor (12) is fixedly installed. The output end of the rotating motor (12) is fixedly connected to a gear (13). On the surface of the crystallization tank (5), a toothed ring (14) is fixedly installed. The surface of the gear (13) is meshed with the surface of the toothed ring (14).

8. A cooling crystallization device for urea resin production according to claim 1, characterized in that: On the bottom of the bottom plate (1), a liquid inlet pipe (9) is fixedly installed. The top end of the liquid inlet pipe (9) is communicated with a cooling pipe (10). In the inner surface of the bottom plate (1), a cavity (8) is opened. The cooling pipe (10) is fixedly installed in the inner cavity of the cavity (8).

Images