Centrifugal drying device for producing polyphenyl sulfone resin

Abstract

The utility model discloses a centrifugal drying device for producing polyphenyl sulfone resin, which comprises a centrifugal dewatering unit and a negative pressure drying unit, the negative pressure drying unit comprises a vacuum drying tank, the vacuum drying tank is fixed on a support, a stirring screw rod is rotatably mounted in the vacuum drying tank, and the stirring screw rod is fixed on the support. The top end and the bottom end of the vacuum drying tank are provided with a feeding port and a discharging port respectively, a heating jacket is arranged outside the vacuum drying tank, and a heating medium inlet and a heating medium outlet are formed in the heating jacket. According to the utility model, the driving mechanism is matched with the multi-gear transmission chain through the incomplete gear (the first gear), so that the continuous reciprocating rotation of the stirring screw rod is realized. When the first gear is alternately meshed with the second gear and the fourth gear, the screw can rotate in the forward direction or the reverse direction through transmission of the belt pulley and the gears, material accumulation caused by single-direction stirring is avoided, materials are heated more evenly in the vacuum drying tank, and the drying efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of polyphenylsulfone resin production technology, and in particular to a centrifugal drying device for polyphenylsulfone resin production. Background Technology

[0002] Polyphenylsulfone (PPSU) resin, as a high-performance engineering plastic, possesses high temperature resistance, chemical corrosion resistance, and excellent mechanical properties, and is widely used in electronics, medical devices, and aerospace industries. In its production process, drying is a crucial step: the wet material after centrifugation and dehydration needs to be dried to remove residual solvents (such as water or organic solvents) to meet the requirements of subsequent granulation and molding processes. Drying efficiency and uniformity directly affect the resin's molecular weight distribution, thermal stability, and the final product performance.

[0003] Currently, traditional polyphenylsulfone resin drying equipment mainly suffers from the following problems:

[0004] 1. Most methods employ unidirectional stirring or static drying, which easily leads to material accumulation on the tank walls or near the stirring shaft, resulting in uneven heating, long drying times, and high energy consumption. Especially under negative pressure, insufficient stirring can easily cause localized excessive residual moisture, requiring multiple reprocessing steps.

[0005] 2. Some equipment uses hydraulic reversing valves or servo motors to control the forward and reverse rotation of the stirring shaft, which not only increases equipment costs, but also causes severe wear of mechanical parts and reduces reliability due to frequent reversals. Utility Model Content

[0006] In order to solve the problems mentioned in the background art, the present invention provides a centrifugal drying device for the production of polyphenylsulfone resin.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A centrifugal drying device for the production of polyphenylsulfone resin includes a centrifugal dehydration unit and a negative pressure drying unit. The negative pressure drying unit includes a vacuum drying tank, which is fixed on a support. A stirring screw is rotatably installed inside the vacuum drying tank. The top and bottom of the vacuum drying tank are respectively provided with a feed port and a discharge port. A heating jacket is provided outside the vacuum drying tank, and the heating jacket is provided with a heat medium inlet and outlet. A drive mechanism is installed on the support, and the drive mechanism drives the stirring screw to rotate continuously.

[0009] Preferably, the drive mechanism includes a rotary motor, and a motor reducer is installed in conjunction with the drive mechanism. The input end of the motor reducer is connected to the output end of the motor reducer, and a first pulley is fixed to the output end of the motor reducer.

[0010] Preferably, a second pulley is rotatably mounted on the bracket via a fixed frame, and a first belt is installed between the first pulley and the second pulley.

[0011] Preferably, a first gear is fixed on the second pulley, and a second gear is fixed on the mounting shaft of the stirring screw, with the first gear meshing with the second gear.

[0012] Preferably, a third gear and a fourth gear are rotatably mounted on the outer wall of the vacuum drying tank, the third gear and the fourth gear meshing with each other, and the fourth gear meshing with the first gear.

[0013] Preferably, the first gear is an incomplete gear, and the first gear only meshes with one of the two gears, the second gear and the fourth gear, at any given time. The third gear, the fourth gear and the second gear have the same diameter, and a third pulley is fixed on the third gear, a fourth pulley is fixed on the second gear, and a second belt is installed between the third pulley and the fourth pulley.

[0014] Preferably, an upper sealing cover and a lower sealing cover are rotatably installed on the feed port and discharge port of the vacuum drying tank, respectively. Both the upper and lower sealing covers are arc-shaped structures. An inclined guide plate is fixed on the support directly below the discharge port. Rollers are fixed at the four corners of the bottom end of the support. A suction port is provided on one side of the vacuum drying tank, and the suction port is connected to the vacuum pumping device through a conduit.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The drive mechanism achieves continuous reciprocating rotation of the stirring screw through the engagement of an incomplete gear (first gear) and a multi-gear transmission chain. When the first gear alternately meshes with the second and fourth gears, the screw can rotate in either the forward or reverse direction via a pulley and gear transmission, avoiding material accumulation caused by unidirectional stirring, and ensuring more uniform heating of the material in the vacuum drying tank, thereby improving drying efficiency.

[0017] 2. The vacuum drying tank is connected to a vacuum device through a suction port to maintain a low internal pressure state, reduce the boiling point of the material, and, together with the heat medium circulation in the heating jacket, achieve low-temperature and high-efficiency drying, avoid degradation of polyphenylsulfone resin due to high temperature, and ensure product quality.

[0018] 3. Only one rotary motor and motor reducer are needed. Through the transmission of the first pulley, the second pulley and gear set, the unidirectional rotation of the motor is converted into the reciprocating rotation of the screw. There is no need for complicated reversing control circuit, which simplifies the equipment structure and reduces energy consumption and maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a first-view perspective perspective view of the present invention;

[0021] Figure 2 This is a second-view perspective perspective view of the present invention;

[0022] Figure 3 This is the left view of the present invention;

[0023] Figure 4 This is a front-view sectional view of the present invention;

[0024] In the diagram: 1. Support; 101. Roller; 102. Inclined guide plate; 2. Vacuum drying tank; 201. Heating jacket; 202. Stirring screw; 203. Upper sealing cover; 204. Lower sealing cover; 205. Suction port; 206. Guide tube; 3. Rotary motor; 301. Motor reducer; 302. First pulley; 303. Fixing frame; 304. Second pulley; 305. First belt; 306. First gear; 307. Second gear; 308. Fourth pulley; 309. Third gear; 310. Fourth gear; 311. Third pulley; 312. Second belt. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Example

[0027] Reference Figure 1-4A centrifugal drying device for the production of polyphenylsulfone resin includes a centrifugal dehydration unit and a negative pressure drying unit. The negative pressure drying unit includes a vacuum drying tank 2, which is fixed on a support 1. A stirring screw 202 is rotatably installed inside the vacuum drying tank 2. The top and bottom of the vacuum drying tank 2 are respectively provided with a feeding port and a discharge port. The outside of the vacuum drying tank 2 is provided with a heating jacket 201, which is provided with a heat medium inlet and outlet. A drive mechanism is installed on the support 1, which drives the stirring screw 202 to rotate continuously.

[0028] First, the wet material is put into a centrifuge for dehydration. Then, the dehydrated material is put into a vacuum drying tank 2, a vacuum is drawn, and hot steam is introduced into the heating jacket 201. The stirring screw 202 is driven by the drive mechanism to rotate continuously. During the reciprocating rotation of the stirring screw 202, the material is stirred, which increases the uniformity of heating of the material and thus improves the drying efficiency. After drying is completed, the material is discharged from the discharge port.

[0029] The drive mechanism includes a rotary motor 3, and a motor reducer 301 is installed in conjunction with it. The input end of the motor reducer 301 is connected to the output end of the motor reducer 301. A first pulley 302 is fixed to the output end of the motor reducer 301. A second pulley 304 is rotatably mounted on the bracket 1 via a fixing bracket 303. A first belt 305 is installed between the first pulley 302 and the second pulley 304. A first gear 306 is fixed to the second pulley 304. A second gear 307 is fixed to the mounting shaft of the stirring screw 202. The first gear 306 and the second gear 307 mesh. The outer wall of the vacuum drying tank 2 also has a rotating... The device is equipped with a third gear 309 and a fourth gear 310, which mesh with each other. The fourth gear 310 also meshes with a first gear 306. The first gear 306 is an incomplete gear, and it only meshes with one of the two gears, the second gear 307 and the fourth gear 310, at any given time. The third gear 309, the fourth gear 310, and the second gear 307 have the same diameter. A third pulley 311 is fixed on the third gear 309, and a fourth pulley 308 is fixed on the second gear 307. A second belt 312 is installed between the third pulley 311 and the fourth pulley 308.

[0030] When the rotary motor 3 is turned on, the motor reducer 301 drives the first pulley 302 to rotate slowly, which in turn drives the second pulley 304 to rotate slowly, which in turn drives the first gear 306 to rotate. When the first gear 306 meshes with the second gear 307, it can drive the stirring screw 202 to rotate in the opposite direction. When the first gear 306 meshes with the fourth gear 310, the transmission chain of the first gear 306, the fourth gear 310, the third gear 309, the third pulley 311, the second belt 312 and the fourth pulley 308 can drive the stirring screw 202 to rotate in the forward direction. Thus, the effect of driving the stirring screw 202 to rotate continuously and reciprocally is achieved simply by turning on the rotary motor 3 and rotating it continuously in the same direction.

[0031] The vacuum drying tank 2 has an upper sealing cover 203 and a lower sealing cover 204 rotatably installed on its feeding port and discharge port, respectively. Both the upper sealing cover 203 and the lower sealing cover 204 are arc-shaped structures. An inclined guide plate 102 is fixed on the support 1 directly below the discharge port. Rollers 101 are fixed at the four corners of the bottom end of the support 1. A suction port 205 is provided on one side of the vacuum drying tank 2. The suction port 205 is connected to the vacuum pumping device through a conduit 206. The presence of the inclined guide plate 102 facilitates the collection of dried materials. By maintaining a low air pressure inside the vacuum drying tank 2, the drying efficiency can be improved.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A centrifugal drying apparatus for the production of polyphenylsulfone resin, comprising a centrifugal dehydration unit and a negative pressure drying unit, characterized in that: The negative pressure drying unit includes a vacuum drying tank (2), which is fixed on a support (1). A stirring screw (202) is rotatably installed inside the vacuum drying tank (2). The top and bottom of the vacuum drying tank (2) are respectively provided with a feeding port and a discharge port. A heating jacket (201) is provided outside the vacuum drying tank (2). A heat medium inlet and outlet are provided on the heating jacket (201). A driving mechanism is installed on the support (1). The driving mechanism drives the stirring screw (202) to rotate continuously.

2. The centrifugal drying apparatus for polyphenylsulfone resin production according to claim 1, characterized in that: The drive mechanism includes a rotary motor (3), and a motor reducer (301) is installed in the drive mechanism. The input end of the motor reducer (301) is connected to the output end of the motor reducer (301), and a first pulley (302) is fixed to the output end of the motor reducer (301).

3. The centrifugal drying apparatus for polyphenylsulfone resin production according to claim 2, characterized in that: A second pulley (304) is rotatably mounted on the bracket (1) via a fixing frame (303), and a first belt (305) is installed between the first pulley (302) and the second pulley (304).

4. The centrifugal drying apparatus for polyphenylsulfone resin production according to claim 3, characterized in that: The second pulley (304) is fixed with a first gear (306), and the mounting shaft of the stirring screw (202) is fixed with a second gear (307). The first gear (306) meshes with the second gear (307).

5. The centrifugal drying apparatus for polyphenylsulfone resin production according to claim 4, characterized in that: The outer wall of the vacuum drying tank (2) is also rotatably mounted with a third gear (309) and a fourth gear (310), which mesh with each other, and the fourth gear (310) meshes with the first gear (306).

6. The centrifugal drying apparatus for polyphenylsulfone resin production according to claim 5, characterized in that: The first gear (306) is an incomplete gear, and the first gear (306) only meshes with one of the two gears, the second gear (307) and the fourth gear (310), at the same time. The third gear (309), the fourth gear (310) and the second gear (307) have the same diameter. A third pulley (311) is fixed on the third gear (309), and a fourth pulley (308) is fixed on the second gear (307). A second belt (312) is installed between the third pulley (311) and the fourth pulley (308).

7. The centrifugal drying apparatus for polyphenylsulfone resin production according to claim 1, characterized in that: The vacuum drying tank (2) has an upper sealing cover (203) and a lower sealing cover (204) rotatably installed on the feeding port and the discharge port, respectively. Both the upper sealing cover (203) and the lower sealing cover (204) are arc-shaped structures. An inclined guide plate (102) is fixed on the support (1) directly below the discharge port. Rollers (101) are fixed at the four corners of the bottom end of the support (1). A suction port (205) is provided on one side of the vacuum drying tank (2). The suction port (205) is connected to the vacuum device through a conduit (206).

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