A hot air crystallization device

Abstract

This utility model relates to the field of hot melt adhesive production technology and discloses a hot air crystallization device, including a mounting frame, an upper crystallization vessel, and a lower crystallization vessel. A top cover is fixedly installed at the end of the upper crystallization vessel away from the lower crystallization vessel. A connecting sleeve is fixedly installed at the end of the top cover away from the upper crystallization vessel. A stirring assembly is fixedly installed at the end of the connecting sleeve away from the upper crystallization vessel. An air outlet pipe is provided at the end of the top cover away from the upper crystallization vessel. This hot air crystallization device, by integrating the upper and lower crystallization vessels into a single structure, avoids material leakage from gaps during crystallization and reduces material residue at the joint. Furthermore, the conical lower vessel allows the crystallized solid material to slide quickly along the vessel wall to the bottom connecting pipe under gravity, preventing localized overheating or uneven crystallization caused by material accumulation in the flat-bottomed vessel. Simultaneously, the conical structure makes the internal space of the lower vessel wider at the top and narrower at the bottom, allowing hot air to diffuse upwards along the vessel wall after entering through the bottom air inlet pipe, improving heat transfer efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hot melt adhesive production technology, specifically a hot air crystallization device. Background Technology

[0002] Hot melt adhesive is a type of malleable adhesive whose physical state changes with temperature within a certain temperature range, while its chemical properties remain unchanged. It is non-toxic, odorless, and an environmentally friendly chemical product. It is highly favored due to its solid nature, ease of packaging, transportation, and storage; its solvent-free, pollution-free, and non-toxic properties; its simple production process; high added value; and its strong and fast bonding speed.

[0003] Chinese Utility Model Patent Publication No. CN208406152U discloses a crystallization and curing device for hot melt adhesives. The device, as described in the specification, comprises a horizontally arranged crystallization vessel with an inlet at the top and an outlet at the bottom. A condensing device is fitted around the outer wall of the crystallization vessel, and a condensing cylinder is arranged radially within the vessel. A stirring device rotates around the condensing cylinder. The condensing cylinder, in conjunction with the condensing device surrounding the vessel, accelerates cooling and improves production efficiency. However, this crystallization and curing device for hot melt adhesives lacks a designed vessel shape, making it prone to localized overheating or uneven crystallization due to material accumulation. Furthermore, it is inconvenient for hot air to enter from the bottom air inlet pipe, as it can diffuse upwards along the vessel wall, resulting in low heat transfer efficiency and hindering widespread application. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a hot air crystallization device that can effectively solve the problems in the prior art, such as the lack of a designed vessel shape, which easily leads to local overheating or uneven crystallization due to material accumulation, and the inconvenience of hot air entering from the bottom air inlet pipe and spreading upward along the vessel wall, resulting in low heat transfer efficiency and inconvenience for widespread use.

[0005] The technical solution adopted by this utility model is: a hot air crystallization device, including a mounting frame, an upper crystallization vessel and a lower crystallization vessel. A top cover is fixedly installed at the end of the upper crystallization vessel away from the lower crystallization vessel. A connecting sleeve is fixedly installed at the end of the top cover away from the upper crystallization vessel. A stirring component is fixedly installed at the end of the connecting sleeve away from the upper crystallization vessel. An air outlet pipe is provided at the end of the top cover away from the upper crystallization vessel. A fixed pipe and a Roots blower are provided at the end of the air outlet pipe away from the upper crystallization vessel. An air inlet pipe is provided at the outer edge of the lower crystallization vessel. An air inlet pipe, a distribution component and a fixed pipe are sequentially provided at the end of the air inlet pipe away from the lower crystallization vessel. The stirring assembly includes a motor, a connecting rod and a transmission rod are fixedly installed at the output end of the motor, an installation sleeve is fixedly installed at the outer edge of the transmission rod, and a stirring rod is fixedly installed at the end of the installation sleeve away from the transmission rod.

[0006] Preferably, the upper crystallization vessel and the lower crystallization vessel are an integral structure, the lower crystallization vessel has a conical cross-section, and the angle of the lower crystallization vessel is greater than 50°.

[0007] The above technical solution integrates the upper and lower crystallizing vessels into a single structure, preventing material leakage from gaps during crystallization and reducing material residue at the joints. Furthermore, the conical lower vessel allows the crystallized solid material to slide quickly along the vessel wall to the bottom connecting pipe under gravity, preventing localized overheating or uneven crystallization caused by material accumulation in the flat-bottomed vessel. The conical structure also makes the internal space of the lower vessel wider at the top and narrower at the bottom, allowing hot air to enter from the bottom air inlet pipe and diffuse upwards along the vessel wall, improving heat transfer efficiency.

[0008] Preferably, two stirring rods are fixedly installed at the outer edge of one of the mounting sleeves, and multiple sets of the mounting sleeves and stirring rods are provided, with the multiple sets of mounting sleeves and stirring rods distributed at equal intervals about the center line of the transmission rod.

[0009] The above technical solution uses two stirring rods in each set of installation sleeves, and multiple sets are distributed at equal intervals along the transmission rod to form a three-dimensional stirring network. This ensures that the material in the reactor is in full contact with the hot air, avoids uneven heating of local materials which can lead to inconsistent crystal particle size, and facilitates uniform crystallization.

[0010] Preferably, a connecting pipe is provided at the end of the lower crystallizer away from the upper crystallizer, and a fan is fixedly installed at the end of the connecting pipe away from the lower crystallizer. The upper crystallizer, the connecting pipe, and the fan are interconnected.

[0011] Through the above technical solution, the design of the airlock allows the rotating impeller to discharge the material from the connecting pipe, which facilitates the prevention of external air from entering the reactor. Furthermore, the airlock can operate continuously, and in conjunction with the gravity discharge of the lower reactor's conical structure, it enables continuous output of crystalline materials, avoiding production interruptions caused by traditional intermittent discharge.

[0012] Preferably, a heat exchanger is fixedly installed at the end of the fixed pipe two away from the distribution component, a fixed pipe three is provided at the end of the heat exchanger away from the fixed pipe two, and a fan body is provided at the end of the fixed pipe three away from the distribution component.

[0013] The above technical solution provides air source through the fan body, heat exchanger heats cold air into hot air, and sends it into the lower crystallization vessel through fixed pipe 2 and distribution components, forming a relatively stable and controllable hot air supply, so that the temperature and air volume required for crystallization are constant, which facilitates efficient heat transfer.

[0014] Preferably, the distribution component includes an installation pipe, with connecting flanges fixedly installed at both ends of the installation pipe, a through groove opened inside the installation pipe, and a baffle plate fixedly installed on the installation pipe through the through groove. The distribution component has three identical baffle plates.

[0015] The above technical solution uses three sets of distribution components distributed circumferentially along the lower crystallizer. The baffles inside the installation pipe change the direction of hot air flow, achieving uniform distribution of hot air in the reactor and avoiding excessive drying or insufficient crystallization of materials caused by local hot air concentration.

[0016] Preferably, a connecting frame is fixedly installed at the outer edge of the mounting frame, and the air outlet pipe, the fixed pipe and the Roots blower are interconnected.

[0017] Through the above technical solution, the supporting rigidity of the mounting frame is enhanced by the connecting frame, and the Roots blower draws out the hot and humid air in the vessel through the air outlet pipe and the fixed pipe to form a hot air circulation loop, which not only ensures the structural stability of the device, but also improves the utilization rate of hot air.

[0018] Compared with the prior art, the present invention provides a hot air crystallization device, which has the following beneficial effects: 1. This hot air crystallization device uses an integrated structure of upper and lower crystallization vessels to prevent material leakage from gaps during crystallization and reduce material residue at the joints. The conical lower vessel allows the crystallized solid material to slide quickly along the vessel wall to the bottom connecting pipe under gravity, avoiding local overheating or uneven crystallization caused by material accumulation in the flat-bottomed vessel. At the same time, the conical structure makes the internal space of the lower vessel wider at the top and narrower at the bottom, allowing hot air to enter from the bottom air inlet pipe and diffuse upwards along the vessel wall, improving heat transfer efficiency. 2. This hot air crystallization device, with each set equipped with two stirring rods, and multiple sets evenly distributed along the transmission rod, forms a three-dimensional stirring network. This ensures that the material inside the vessel is in full contact with the hot air, avoiding uneven heating of local materials that leads to inconsistent crystal particle size, thus facilitating uniform crystallization. The design of the airlock fan allows the rotating impeller to discharge the material from the connecting pipe, effectively preventing external air from entering the vessel. Furthermore, the airlock fan can operate continuously, combined with the gravity discharge of the lower conical structure of the vessel, achieving continuous output of crystallized material and avoiding production interruptions caused by traditional intermittent discharge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ; Figure 4This is a schematic diagram of the mounting frame and connecting frame of this utility model. Figure 5 This is a schematic diagram of the disassembled structure of this utility model; Figure 6 This is a schematic diagram showing the disassembled structure of the upper and lower crystallization vessels of this utility model; Figure 7 This is a schematic diagram of the cross-sectional structure of the upper and lower crystallization vessels of this utility model; Figure 8 This is a three-dimensional structural diagram of the stirring assembly of this utility model. Figure 9 This is a schematic cross-sectional view of the distribution component of this utility model. The components are as follows: 1. Mounting frame; 2. Connecting frame; 3. Upper crystallizer; 4. Lower crystallizer; 5. Top cover; 6. Connecting sleeve; 7. Stirring assembly; 701. Motor; 702. Connecting rod; 703. Transmission rod; 704. Mounting sleeve; 705. Stirring rod; 8. Connecting pipe; 9. Shut-off fan; 10. Air outlet pipe; 11. Fixed pipe one; 12. Roots blower; 13. Air inlet pipe; 14. Distribution assembly; 1401. Mounting pipe; 1402. Connecting flange; 1403. Through groove; 1404. Baffle plate; 15. Fixed pipe two; 16. Heat exchanger; 17. Fixed pipe three; 18. Blower body. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1: As Figure 1-9 As shown, the hot air crystallization device provided by this utility model includes a mounting frame 1, an upper crystallization vessel 3 and a lower crystallization vessel 4. A top cover 5 is fixedly installed at the end of the upper crystallization vessel 3 away from the lower crystallization vessel 4. A connecting sleeve 6 is fixedly installed at the end of the top cover 5 away from the upper crystallization vessel 3. A stirring component 7 is fixedly installed at the end of the connecting sleeve 6 away from the upper crystallization vessel 3. An air outlet pipe 10 is provided at the end of the top cover 5 away from the upper crystallization vessel 3. A fixed pipe 11 and a Roots blower 12 are provided at the end of the air outlet pipe 10 away from the upper crystallization vessel 3. An air inlet pipe 13 is provided at the outer edge of the lower crystallization vessel 4. An air inlet pipe 13, a distribution component 14 and a fixed pipe 15 are sequentially provided at the end of the air inlet pipe 13 away from the lower crystallization vessel 4. The stirring assembly 7 includes a motor 701. A connecting rod 702 and a transmission rod 703 are fixedly installed at the output end of the motor 701. An installation sleeve 704 is fixedly installed at the outer edge of the transmission rod 703. A stirring rod 705 is fixedly installed at the end of the installation sleeve 704 away from the transmission rod 703.

[0022] Specifically, the upper crystallizing vessel 3 and the lower crystallizing vessel 4 are an integrated structure. The lower crystallizing vessel 4 has a conical cross-section with an angle greater than 50°. The advantage is that by integrating the upper crystallizing vessel 3 and the lower crystallizing vessel 4, material leakage from the gaps during the crystallization process is avoided, and material residue at the joint is reduced. Furthermore, the conical lower vessel allows the crystallized solid material to slide quickly along the vessel wall to the bottom connecting pipe 8 under gravity, avoiding local overheating or uneven crystallization caused by material accumulation in the flat-bottomed vessel. At the same time, the conical structure makes the internal space of the lower vessel wider at the top and narrower at the bottom. After hot air enters from the bottom air inlet pipe 13, it can diffuse upward along the vessel wall, improving heat transfer efficiency.

[0023] Specifically, two stirring rods 705 are fixedly installed on the outer edge of an installation sleeve 704. Multiple sets of the installation sleeve 704 and stirring rods 705 are provided, and the multiple sets of installation sleeves 704 and stirring rods 705 are distributed at equal intervals about the center line of the transmission rod 703. The advantage is that by having two stirring rods 705 on each set of installation sleeves 704, and multiple sets distributed at equal intervals along the transmission rod 703, a three-dimensional stirring network is formed, which makes the material in the reactor fully contact with the hot air, avoids uneven heating of local materials and causes uneven crystal particle size, and facilitates uniform crystallization.

[0024] Specifically, a connecting pipe 8 is provided at the end of the lower crystallizer 4 away from the upper crystallizer 3, and a fan 9 is fixedly installed at the end of the connecting pipe 8 away from the lower crystallizer 4. The upper crystallizer 3, the connecting pipe 8 and the fan 9 are interconnected.

[0025] The advantage is that the design of the airlock 9 allows the rotating impeller to discharge the material from the connecting pipe 8, which facilitates the blocking of external air from entering the reactor. In addition, the airlock 9 can operate continuously, and together with the gravity discharge of the lower reactor's conical structure, it can achieve continuous output of crystalline materials, avoiding production interruptions caused by traditional intermittent discharge.

[0026] Example 2: Figure 2-9 As shown, this is an improvement on the previous embodiment.

[0027] Specifically, a heat exchanger 16 is fixedly installed at the end of the fixed pipe 15 away from the distribution component 14, and a fixed pipe 17 is provided at the end of the heat exchanger 16 away from the fixed pipe 15. A fan body 18 is provided at the end of the fixed pipe 17 away from the distribution component 14. The advantage is that the fan body 18 provides the air source, the heat exchanger 16 heats the cold air into hot air, and sends it into the lower crystallizer 4 through the fixed pipe 15 and the distribution component 14, forming a relatively stable and controllable hot air supply, so that the temperature and air volume required for crystallization are constant, which facilitates efficient heat transfer.

[0028] Specifically, the distribution component 14 includes an installation pipe 1401, with connecting flanges 1402 fixedly installed at both ends of the installation pipe 1401. A through groove 1403 is opened inside the installation pipe 1401, and a baffle plate 1404 is fixedly installed on the installation pipe 1401 through the through groove 1403. The distribution component 14 is provided with three identical components. The advantage is that by distributing the three sets of distribution components 14 around the lower crystallizer 4, the baffle plate 1404 in the installation pipe 1401 changes the direction of hot air flow, thereby achieving uniform distribution of hot air in the reactor and avoiding excessive drying or insufficient crystallization of materials caused by local hot air concentration.

[0029] Specifically, a connecting frame 2 is fixedly installed on the outer edge of the mounting frame 1. The air outlet pipe 10, the fixed pipe 11 and the Roots blower 12 are interconnected. The advantage is that the connecting frame 2 enhances the support rigidity of the mounting frame 1. The Roots blower 12 draws out the hot and humid air in the vessel through the air outlet pipe 10 and the fixed pipe 11, forming a hot air circulation loop, which not only ensures the stability of the device structure, but also improves the utilization rate of hot air.

[0030] Working Principle: During use, the upper crystallizing vessel 3 and the lower crystallizing vessel 4 are integrated into a single structure, preventing material leakage from gaps during crystallization and reducing material residue at the joints. The conical lower vessel allows the crystallized solid material to slide quickly along the vessel wall to the bottom connecting pipe 8 under gravity, preventing localized overheating or uneven crystallization caused by material accumulation in the flat-bottomed vessel. The conical structure also makes the internal space of the lower vessel wider at the top and narrower at the bottom, allowing hot air entering from the bottom air inlet pipe 13 to diffuse upwards along the vessel wall, improving heat transfer efficiency. Each set of mounting sleeves 704 carries two stirring rods 705, and multiple sets are evenly distributed along the transmission rod 703, forming a three-dimensional stirring network. This ensures full contact between the material inside the vessel and the hot air, preventing uneven heating of localized materials and resulting in inconsistent crystal particle size, facilitating uniform crystallization. The design of the airlock 9 allows the rotating impeller to discharge material from the connecting pipe 8, effectively preventing external air from entering the vessel. Furthermore, the blower 9 can operate continuously, and in conjunction with the gravity discharge of the lower reactor's conical structure, it achieves continuous output of crystalline materials, avoiding production interruptions caused by traditional intermittent discharge. The blower body 18 provides the air source, and the heat exchanger 16 heats the cold air into hot air, which is then sent into the lower crystallizer 4 through the fixed pipe 15 and the distribution components 14, forming a relatively stable and controllable hot air supply. This ensures that the temperature and air volume required for crystallization are constant, facilitating efficient heat transfer. The three sets of distribution components 14 are distributed around the lower crystallizer 4, and the baffles 1404 in the mounting pipe 1401 change the direction of the hot air flow, achieving uniform distribution of hot air in the reactor. This avoids excessive drying of materials or insufficient crystallization caused by local hot air concentration. The connecting frame 2 enhances the support rigidity of the mounting frame 1, and the Roots blower 12 draws out the hot and humid air in the reactor through the outlet pipe 10 and the fixed pipe 11, forming a hot air circulation loop. This ensures the stability of the device structure and improves the utilization rate of hot air.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot air crystallization apparatus, comprising a mounting frame (1), an upper crystallization vessel (3), and a lower crystallization vessel (4), characterized in that: A top cover (5) is fixedly installed at the end of the upper crystallizer (3) away from the lower crystallizer (4). A connecting sleeve (6) is fixedly installed at the end of the top cover (5) away from the upper crystallizer (3). A stirring assembly (7) is fixedly installed at the end of the connecting sleeve (6) away from the upper crystallizer (3). An air outlet pipe (10) is provided at the end of the top cover (5) away from the upper crystallizer (3). A fixed pipe (11) and a Roots blower (12) are provided at the end of the air outlet pipe (10) away from the upper crystallizer (3). An air inlet pipe (13) is provided at the outer edge of the lower crystallizer (4). An air inlet pipe (13), a distribution assembly (14), and a fixed pipe (15) are sequentially provided at the end of the air inlet pipe (13) away from the lower crystallizer (4). The stirring assembly (7) includes a motor (701), a connecting rod (702) and a transmission rod (703) are fixedly installed at the output end of the motor (701), an installation sleeve (704) is fixedly installed at the outer edge of the transmission rod (703), and a stirring rod (705) is fixedly installed at the end of the installation sleeve (704) away from the transmission rod (703).

2. The hot air crystallization apparatus according to claim 1, characterized in that: The upper crystallization vessel (3) and the lower crystallization vessel (4) are an integral structure. The lower crystallization vessel (4) has a "conical" cross-section and the angle of the lower crystallization vessel (4) is greater than 50°.

3. The hot air crystallization apparatus according to claim 1, characterized in that: Two stirring rods (705) are fixedly installed on the outer edge of one of the mounting sleeves (704). The mounting sleeves (704) and stirring rods (705) are provided in multiple sets, and the multiple sets of mounting sleeves (704) and stirring rods (705) are distributed at equal intervals about the center line of the transmission rod (703).

4. The hot air crystallization apparatus according to claim 1, characterized in that: The lower crystallizer (4) is provided with a connecting pipe (8) at the end away from the upper crystallizer (3). A fan (9) is fixedly installed at the end of the connecting pipe (8) away from the lower crystallizer (4). The upper crystallizer (3), the connecting pipe (8) and the fan (9) are interconnected.

5. A hot air crystallization apparatus according to claim 1, characterized in that: A heat exchanger (16) is fixedly installed at one end of the fixed pipe two (15) away from the distribution component (14). A fixed pipe three (17) is provided at one end of the heat exchanger (16) away from the fixed pipe two (15). A fan body (18) is provided at one end of the fixed pipe three (17) away from the distribution component (14).

6. The hot air crystallization apparatus according to claim 1, characterized in that: The distribution component (14) includes an installation pipe (1401), with connecting flanges (1402) fixedly installed at both ends of the installation pipe (1401). A through groove (1403) is provided inside the installation pipe (1401), and a baffle plate (1404) is fixedly installed on the installation pipe (1401) through the through groove (1403). The distribution component (14) has three identical baffle plates.

7. A hot air crystallization apparatus according to claim 1, characterized in that: A connecting frame (2) is fixedly installed on the outer edge of the mounting frame (1), and the air outlet pipe (10), the fixed pipe (11) and the Roots blower (12) are interconnected.

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