Drying device for DHPPA

Abstract

The invention discloses a drying device for DHPPA, and relates to the technical field of DHPPA processing.The drying device comprises a double-cone rotary vacuum drying machine body, a vacuum filtering cover is arranged in a tank body of the double-cone rotary vacuum drying machine body, and the vacuum filtering cover is sleeved with a sleeve fixed to the inner wall of the tank body; and a cleaning mechanism for cleaning the filter holes in the vacuum filter cover to prevent blockage is arranged in the sleeve. According to the double-cone rotary vacuum drying machine, the tank body of the double-cone rotary vacuum drying machine body drives the extrusion plate of the telescopic frame to rotate along the convex plate of the fixed frame while rotating, the cleaning brush is driven by the convex plate to extend out of the sleeve to brush the vacuum filter cover, and the cleaning brush is reset into the sleeve under the action of the tension spring; bristles on the cleaning brush are shifted under the action of a shifting ring on the inner side of a convex plate, so that the cleaning brush is kept integral, and the effect of cleaning the vacuum filter cover again by the cleaning brush is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of DHPPA processing, and in particular to a drying device for DHPPA. Background Art

[0002] The quality requirement for DHPPA (R-(+)-2-(4-hydroxyphenoxy)propionic acid) is that its water content per unit mass must be less than 0.3%. Therefore, it needs to be dried during the production process to ensure that the product meets quality standards. DHPPA is generally dried using a double-cone rotary vacuum drying device. Its vacuum environment and dynamic rotary heating design can effectively reduce product loss during the drying process, thereby improving product yield. When drying in the double-cone rotary vacuum drying device, a vacuum pump is required to evacuate the tank to maintain the vacuum state of the tank. However, the vacuum filter cover used for exhaust is easily clogged with DHPPA powder, thereby affecting the vacuum effect. Summary of the Invention

[0003] The object of the present invention is to provide a drying device for DHPPA to overcome the above-mentioned defects in the prior art.

[0004] A drying device for DHPPA, comprising a double-cone rotary vacuum dryer body, wherein a vacuum filter cover is provided in a tank body of the double-cone rotary vacuum dryer body, and a sleeve is provided on the vacuum filter cover and fixed to the inner wall of the tank body;

[0005] The sleeve is provided with a cleaning mechanism for cleaning the filter holes on the vacuum filter cover to prevent clogging.

[0006] Preferably, the cleaning mechanism includes a guide rod, a telescopic frame, a tension spring, a cleaning brush and a fixed frame, the two ends of the guide rod are respectively connected to the outer retaining ring and the inner retaining ring on the sleeve, the telescopic frame is slidably connected to the guide rod, the tension spring is sleeved on the guide rod and one end thereof is connected to the telescopic frame, the other end of the tension spring is connected to the inner retaining ring, the cleaning brush is arranged at the outer end of the telescopic frame, the telescopic frame is provided with an extrusion plate, the fixed frame is arranged on the connecting pipe of the vacuum filter cover, and the fixed frame is provided with a convex plate.

[0007] Preferably, arc-shaped transition surfaces are provided at the connection points between the two sides of the convex plate and the fixing frame.

[0008] Preferably, the fixing frame is fixed to the connecting pipe of the vacuum filter cover via a connecting ring.

[0009] Preferably, the fixing frame is provided with a shifting ring on the inner side of the protruding plate, which is directly opposite to the connecting ring, and the shifting ring is slidably inserted into a limiting block on the inner wall of the protruding plate.

[0010] Preferably, one end of each extrusion plate that contacts the convex plate is rotatably connected to a guide wheel.

[0011] Preferably, two guide rods are provided and are symmetrically arranged on both sides of the telescopic frame.

[0012] Preferably, the cleaning brush is an arc-shaped structure and is provided in plurality, and the cleaning brushes are evenly distributed along the circumference of the telescopic frame.

[0013] Preferably, the guide rod is slidably connected to a connecting ear on a side of the telescopic frame.

[0014] Preferably, a plurality of extrusion plates with triangular structures are evenly distributed along the circumference of the inner end of the telescopic frame, and a plurality of convex plates with triangular structures are evenly distributed along the circumference of the fixed frame, and the extrusion plates correspond to the convex plates one by one.

[0015] The beneficial effects achieved by the present invention are:

[0016] The present application drives the extrusion plate of the telescopic frame to rotate along the convex plate of the fixed frame while the tank body of the double-cone rotary vacuum dryer rotates, and the cleaning brush is driven by the convex plate to extend out of the sleeve to brush the vacuum filter cover, and is reset to the sleeve under the action of the tension spring, and the bristles on the cleaning brush are moved by the action of the shifting ring on the inner side of the convex plate, so that the cleaning brush remains intact, thereby improving the effect of the cleaning brush in cleaning the vacuum filter cover again. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall internal structure of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the outer side of the sleeve and the cleaning mechanism of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the inner side of the sleeve and the cleaning mechanism of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the cleaning mechanism of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the telescopic frame, cleaning brush and extrusion plate of the present invention.

[0022] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0023] Figure 7 It is a structural schematic diagram of the fixing frame, connecting ring, convex plate and shifting ring of the present invention.

[0024] In the figure, 1. Double-cone rotary vacuum dryer body; 2. Tank body; 3. Casing; 31. Outer retaining ring; 32. Inner retaining ring; 4. Vacuum filter cover; 5. Cleaning mechanism; 51. Guide rod; 52. Telescopic frame; 53. Tension spring; 54. Cleaning brush; 55. Extrusion plate; 551. Guide wheel; 56. Fixed frame; 561. Connecting ring; 562. Convex plate; 563. Arc transition surface; 57. Dial ring; 58. Limit block. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention.

[0026] like Figure 1-7 As shown, the present invention provides a drying device for DHPPA, comprising a double-cone rotary vacuum dryer body 1, a tank body 2 of the double-cone rotary vacuum dryer body 1 is provided with a vacuum filter cover 4, and a sleeve 3 fixed to the inner wall of the tank body 2 is sleeved on the vacuum filter cover 4;

[0027] The sleeve 3 is provided with a cleaning mechanism 5 for cleaning the filter holes on the vacuum filter cover 4 to prevent clogging. The cleaning mechanism 5 includes a guide rod 51, a telescopic frame 52, a tension spring 53, a cleaning brush 54 and a fixing frame 56. The guide rod 51 is provided with two and is symmetrically arranged on both sides of the telescopic frame 52. The guide rod 51 is slidably connected to the connecting ears on the side of the telescopic frame 52. The two ends of the guide rod 51 are respectively connected to the outer retaining ring 31 and the inner retaining ring 32 on the sleeve 3. The telescopic frame 52 is slidably connected to the guide rod 51. The tension spring 53 is sleeved on the guide rod 51 and one end of it is connected to the telescopic frame 52. The other end of the tension spring 53 is connected to the inner retaining ring 32.

[0028] The cleaning brush 54 is an arc-shaped structure and is provided with several thereof. The cleaning brushes 54 are evenly distributed along the circumference of the telescopic frame 52. The vacuum filter cover 4 is cleaned by the provided cleaning brushes 54. An extrusion plate 55 is provided on the telescopic frame 52. The fixed frame 56 is fixed to the connecting pipe of the vacuum filter cover 4 through a connecting ring 561. A convex plate 562 is provided on the fixed frame 56. The end of each extrusion plate 55 in contact with the convex plate 562 is rotatably connected to a guide wheel 551, thereby reducing the friction between the extrusion plate 55 and the convex plate 562. Arc-shaped transition surfaces 563 are provided at the connection between the two sides of the convex plate 562 and the fixed frame 56.

[0029] Several triangular extrusion plates 55 are evenly distributed along the circumference of the inner end of the telescopic frame 52, and several triangular convex plates 562 are evenly distributed along the circumference of the fixed frame 56. The extrusion plates 55 correspond to the convex plates 562 one by one.

[0030] The fixing frame 56 is provided with a shifting ring 57 on the inner side of the protruding plate 562 , facing the connecting ring 561 . The shifting ring 57 is slidably inserted into a limiting block 58 on the inner wall of the protruding plate 562 .

[0031] Specific implementation and principle:

[0032] During operation, the DHPPA to be dried is placed in the tank body 2 through the feed port on the top of the tank body 2 of the double-cone rotary vacuum dryer body 1, and then the top of the tank body 2 is sealed. Then, under the action of the vacuum pump, the tank body 2 is vacuumed through the vacuum filter cover 4. At this time, the cleaning brush 54 is located in the sleeve 3. After the tank body 2 is vacuumed, the heating mechanism in the tank body 2 is started and the motor is turned on. The motor drives the tank body 2 to rotate. When the tank body 2 rotates, the sleeve 3 on its inner wall is driven to rotate, thereby rotating the telescopic frame 52. When the telescopic frame 52 rotates, the extrusion plate 55 thereon moves under the drive of the convex plate 562 of the fixed frame 56. , thereby driving the cleaning brush 54 to extend out of the sleeve 3, and brushing the filter holes on the vacuum filter cover 4 through the cleaning brush 54. When the extrusion plate 55 on the telescopic frame 52 is located between the two convex plates 562 of the fixed frame 56, the cleaning brush 54 is reset to the sleeve 3 under the action of the tension spring 53 on the guide rod 51, and the bristles on the cleaning brush 54 are moved under the action of the dial ring 57 to keep it tidy. The pressure gauge on the tank body 2 can monitor the pressure inside the tank body 2 at all times. When it does not meet the set vacuum degree, the vacuum pump can vacuumize during the drying process. The cleaning of the filter holes on the vacuum filter cover 4 by the cleaning brush 54 can avoid affecting the vacuuming efficiency.

[0033] To sum up, in the present application, the tank body 2 of the double-cone rotary vacuum dryer body 1 drives the extrusion plate 55 of the telescopic frame 52 to rotate along the convex plate 562 of the fixed frame 56 while rotating, and drives the cleaning brush 54 to extend out of the sleeve 3 to brush the vacuum filter cover 4 under the drive of the convex plate 562, and resets it to the sleeve 3 under the action of the tension spring 53, and the bristles on the cleaning brush 54 are moved under the action of the shifting ring 57 on the inner side of the convex plate 562, so that the cleaning brush 54 remains intact, thereby improving the effect of the cleaning brush 54 in cleaning the vacuum filter cover 4 again.

[0034] The above-described embodiments of the present invention do not limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A drying device for DHPPA, comprising a double-cone rotary vacuum dryer body (1), wherein a vacuum filter cover (4) is provided in a tank body (2) of the double-cone rotary vacuum dryer body (1), and characterized in that: The vacuum filter cover (4) is sleeved with a sleeve (3) fixed to the inner wall of the tank body (2); The sleeve (3) is provided with a cleaning mechanism (5) for cleaning the filter holes on the vacuum filter cover (4) to prevent clogging.

2. A drying device for DHPPA according to claim 1, characterized in that: The cleaning mechanism (5) comprises a guide rod (51), a telescopic frame (52), a tension spring (53), a cleaning brush (54) and a fixed frame (56). The two ends of the guide rod (51) are respectively connected to the outer retaining ring (31) and the inner retaining ring (32) on the sleeve (3). The telescopic frame (52) is slidably connected to the guide rod (51). The tension spring (53) is sleeved on the guide rod (51) and one end of the tension spring is connected to the telescopic frame (52). The other end of the tension spring (53) is connected to the inner retaining ring (32). The cleaning brush (54) is arranged at the outer end of the telescopic frame (52). The telescopic frame (52) is provided with an extrusion plate (55). The fixed frame (56) is arranged on the connecting pipe of the vacuum filter cover (4). The fixed frame (56) is provided with a convex plate (562).

3. A drying device for DHPPA according to claim 2, characterized in that: Arc-shaped transition surfaces (563) are provided at the connection points between the two sides of the convex plate (562) and the fixing frame (56).

4. A drying device for DHPPA according to claim 2, characterized in that: The fixing frame (56) is fixed to the connecting pipe of the vacuum filter cover (4) via a connecting ring (561).

5. A drying device for DHPPA according to claim 4, characterized in that: The fixing frame (56) is provided with a shifting ring (57) on the inner side of the convex plate (562) and directly facing the connecting ring (561). The shifting ring (57) is slidably inserted into a limiting block (58) on the inner wall of the convex plate (562).

6. A drying device for DHPPA according to claim 2, characterized in that: One end of each extrusion plate (55) that contacts the convex plate (562) is rotatably connected to a guide wheel (551).

7. A drying device for DHPPA according to claim 2, characterized in that: The guide rods (51) are provided in two and are symmetrically arranged on both sides of the telescopic frame (52).

8. The drying device for DHPPA according to claim 2, characterized in that: The cleaning brushes (54) are of arc-shaped structure and are provided in plurality. The cleaning brushes (54) are evenly distributed along the circumference of the telescopic frame (52).

9. A drying device for DHPPA according to claim 7, characterized in that: The guide rod (51) is slidably connected to a connecting ear on the side of the telescopic frame (52).

10. The drying device for DHPPA according to claim 2, characterized in that: Several triangular extrusion plates (55) are evenly distributed along the circumference of the inner end of the telescopic frame (52), and several triangular convex plates (562) are evenly distributed along the circumference of the fixed frame (56), and the extrusion plates (55) correspond to the convex plates (562) one by one.

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