Heating and stirring device for preparing sebacic dihydrazide

Abstract

The utility model belongs to the technical field of sebacic dihydrazide preparation devices, and particularly relates to a heating and stirring device for sebacic dihydrazide preparation, which comprises a support seat, a mixing barrel fixedly connected in the support seat, a barrel cover mounted in the mixing barrel, a motor II fixedly connected on the lower surface of the barrel cover, and a motor II fixedly connected on the lower surface of the motor II. An eccentric wheel is fixedly connected to the output end of the second motor and rotationally connected into the barrel cover, and a connecting rod is movably connected to the outer wall of the eccentric wheel. By arranging the second motor, the eccentric wheel, the connecting rod, the sliding block, the inserting rod and the filtering barrel, the second motor drives the eccentric wheel to rotate, drives the connecting rod to reciprocate and enables the sliding block to drive the inserting rod and the filtering barrel to slide in a reciprocating mode, and therefore sebacic acid crystals are screened through reciprocating movement of the filtering barrel, and by-product crystals are left in the filtering barrel; and sebacic acid crystals enter the mixing barrel after being screened, so that the purity of the sebacic acid dihydrazide product is prevented from being influenced by the sebacic acid crystals.

Description

Technical Field

[0001] This utility model belongs to the technical field of sebacic acid dihydrazide preparation device, specifically a heating and stirring device for preparing sebacic acid dihydrazide. Background Technology

[0002] Sebacic acid dihydrazide is an important polymeric crosslinking agent, widely used in epoxy resin curing, coatings, and adhesives. Its preparation typically involves the reaction of dimethyl sebacic acid (or sebacic acid) with hydrazine hydrate, requiring heating, stirring, and temperature control; therefore, a heating and stirring device is used.

[0003] Existing heating and stirring devices typically only have heating and stirring functions and do not include a structure for sieving sebacate crystals. Since sebacate is a white crystalline solid, it is mainly produced by high-temperature cracking of castor oil. During the cracking process, other dicarboxylic acids (such as octanoic acid and azelaic acid) or polycarboxylic acids may be generated. Their molecular structures are similar to sebacate, but their carbon chain lengths are different. The crystal structures of these byproducts differ from those of sebacate, and they are larger in size. Furthermore, they may compete with hydrazine hydrate for reaction sites during the reaction. If sebacate is directly added to the mixing tank and heated and stirred with hydrazine hydrate, the purity of the product sebacate dihydrazide will be affected. Summary of the Invention

[0004] The purpose of this invention is to provide a heating and stirring device for the preparation of sebacic acid dihydrazide, which can sieve the added sebacic acid crystals.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A heating and stirring device for preparing sebacic acid dihydrazide is provided, comprising a support base, a mixing tank fixedly connected inside the support base, a tank lid installed inside the mixing tank, a second motor fixedly connected to the lower surface of the tank lid, an eccentric wheel fixedly connected to the output end of the second motor, the eccentric wheel rotatably connected inside the tank lid, a connecting rod movably connected to the outer wall of the eccentric wheel, a slider slidably connected inside the tank lid, the connecting rod movably connected to the outer wall of the slider, sliding rods fixedly connected to both sides of the outer wall of the slider, the sliding rods slidably connected inside the tank lid, a spring is provided inside the tank lid, an insert rod slidably connected inside the slider, a filter tank fixedly connected to the lower surface of the insert rod, filter holes are provided on the side wall and bottom of the filter tank, the pore size of the filter holes is larger than the size of sebacic acid crystals and smaller than the crystal size of the by-products.

[0006] Optionally, the two ends of the spring are fixedly connected to the inner wall of the bucket lid and the side wall of the slide rod, respectively. The slider and the insertion rod are fixedly connected by bolts and nuts. A feeding tube is fixedly connected inside the bucket lid.

[0007] Optionally, a controller is fixedly connected to the outer wall of the mixing tank, multiple electric heating tubes are installed inside the mixing tank, a motor is fixedly connected to the lower surface of the mixing tank, a rotating shaft is fixedly connected to the output end of the motor, and a stirring rod is fixedly connected to the outer wall of the rotating shaft.

[0008] Optionally, a guide pipe is fixedly connected inside the mixing tank, a connecting pipe is fixedly connected to the outer wall of the guide pipe, a discharge pipe is fixedly connected inside the connecting pipe, a guide cylinder is rotatably connected inside the connecting pipe, and a connecting rod is fixedly connected to the outer wall of the guide cylinder.

[0009] Optionally, the connecting rod is rotatably connected to the inside of the connecting tube, a sliding plate is slidably connected to the outer wall of the connecting rod, a pin is fixedly connected to the outer wall of the sliding plate, a slot one and a slot two are provided inside the connecting tube, the slot one is located above the connecting rod, the slot two is located on the right side of the connecting rod, and a spring three is sleeved on the outer wall of the connecting rod, with the two ends of the spring three being fixedly connected to the inside of the connecting rod and the sliding plate, respectively.

[0010] Optionally, a fixing block is fixedly connected to both sides of the outer wall of the bucket lid, and a socket is slidably connected inside the fixing block. The socket is slidably connected inside the mixing bucket, and a second spring is sleeved on the outer wall of the socket. The two ends of the second spring are respectively fixedly connected to the socket and the fixing block.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This utility model is equipped with a second motor, an eccentric wheel, a connecting rod, a slider, an insert rod, and a filter barrel. In use, the second motor drives the eccentric wheel to rotate, which in turn drives the connecting rod to reciprocate and causes the slider to drive the insert rod and the filter barrel to slide back and forth. Thus, the reciprocating movement of the filter barrel achieves the sieving of sebacic acid crystals. The by-product crystals remain inside the filter barrel, while the sebacic acid crystals, after sieving, enter the interior of the mixing barrel to prevent them from affecting the preparation of sebacic acid dihydrazide.

[0013] 2. This utility model is equipped with a connecting pipe, a guide pipe, a discharge pipe, a connecting rod, a guide cylinder, a sliding plate, a pin, and a spring. When the prepared sebacic acid dihydrazide needs to be discharged, the sliding plate is pulled outward, causing the pin to slide out of the interior of the connecting pipe. The connecting rod is rotated, causing the sliding plate and the guide cylinder to rotate 90°. Then the sliding plate is released, allowing the pin to re-enter the interior of the connecting pipe, thereby aligning the through hole of the guide cylinder with the guide pipe and the discharge pipe, thus realizing the discharge. The angle of the guide cylinder can be adjusted according to the required discharge volume. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the slider of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the stirring rod of this utility model;

[0018] Figure 4 This is a schematic diagram of the material guide cylinder of this utility model.

[0019] In the diagram: 1. Support base; 2. Mixing tank; 201. Controller; 202. Electric heating element; 203. Motor 1; 204. Rotating shaft; 205. Stirring rod; 3. Tank lid; 301. Motor 2; 302. Eccentric wheel; 303. Connecting rod; 304. Sliding block; 305. Insert rod; 306. Filter tank; 307. Sliding rod; 308. Spring 1; 309. Feeding pipe; 310. Fixing block; 311. Socket; 312. Spring 2; 4. Connecting pipe; 401. Guide pipe; 402. Discharge pipe; 403. Connecting rod; 404. Guide cylinder; 405. Slide plate; 406. Pin; 407. Spring 3. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] The present invention will now be described. A heating and stirring device for the preparation of sebacic acid dihydrazide includes a support base 1. A mixing tank 2 is fixedly connected inside the support base 1. A tank cover 3 is installed inside the mixing tank 2. A motor 301 is fixedly connected to the lower surface of the tank cover 3. An eccentric wheel 302 is fixedly connected to the output end of the motor 301. The eccentric wheel 302 is rotatably connected inside the tank cover 3. A connecting rod 303 is movably connected to the outer wall of the eccentric wheel 302. A slider 304 is slidably connected inside the tank cover 3, and the slider 304 is limited to sliding inside the tank cover 3. The connecting rod 303 is movably connected to the outer wall of the slider 304. Sliding rods 307 are fixedly connected to both sides of the outer wall of the slider 304, and the sliding rods 307 are slidably connected to the inside of the tank cover 3, and the sliding rods 307 are limited to sliding inside the tank cover 3. The barrel lid 3 has a spring 308 inside, and a sliding rod 305 is slidably connected inside the slider 304. A filter barrel 306 is fixedly connected to the lower surface of the sliding rod 305. Filter holes are opened on the side wall and bottom of the filter barrel 306. The diameter of the filter holes is larger than the size of sebacic acid crystals and smaller than the size of by-product crystals. The filter barrel 306 is used to filter sebacic acid crystals. The two ends of the spring 308 are fixedly connected to the inner wall of the barrel lid 3 and the side wall of the slider 307, respectively. The spring 308 assists the slider 307 in resetting. The slider 304 and the sliding rod 305 are fixedly connected by bolts and nuts. A feeding pipe 309 is fixedly connected inside the barrel lid 3. The feeding pipe 309 facilitates the addition of sebacic acid crystals into the filter barrel 306.

[0025] The heating and stirring device for preparing sebacic acid dihydrazide provided by this utility model, compared with the prior art, can screen the crystals of by-products contained in the sebacic acid crystals added into the mixing tank 2, so as to prevent them from affecting the purity of the product sebacic acid dihydrazide.

[0026] Please refer to another embodiment of this utility model as well. Figures 1 to 4 A controller 201 is fixedly connected to the outer wall of the mixing tank 2. Multiple electric heating elements 202 are installed inside the mixing tank 2. The controller 201 controls the electric heating elements 202 to heat the mixing tank 2. A motor 203 is fixedly connected to the lower surface of the mixing tank 2. A rotating shaft 204 is fixedly connected to the output end of the motor 203. A stirring rod 205 is fixedly connected to the outer wall of the rotating shaft 204. When the motor 203 is working, it drives the rotating shaft 204 and the stirring rod 205 to rotate and stir. An internal guide pipe 401 is fixedly connected, and a connecting pipe 4 is fixedly connected to the outer wall of the guide pipe 401. An outlet pipe 402 is fixedly connected inside the connecting pipe 4. A guide cylinder 404 is rotatably connected inside the connecting pipe 4, and the guide cylinder 404 is limited to rotate within the connecting pipe 4. A connecting rod 403 is fixedly connected to the outer wall of the guide cylinder 404, and the connecting rod 403 is rotatably connected inside the connecting pipe 4. A sliding plate 405 is slidably connected to the outer wall of the connecting rod 403, and the sliding plate 405 is limited to slide within the connecting rod 403. The outer wall of the 03 slide plate 405 is fixedly connected to the pin 406. The inside of the connecting tube 4 is provided with slot one and slot two. Slot one is located above the connecting rod 403, and slot two is located on the right side of the connecting rod 403. The pin 406 can be slidably connected to the inside of slot one or slot two. The outer wall of the connecting rod 403 is fitted with spring three 407. The two ends of spring three 407 are fixedly connected to the inside of the connecting rod 403 and the slide plate 405 respectively. Spring three 407 supports the slide plate 405, thereby limiting the position of pin 406 inside the connecting tube 4. The outer walls of the bucket lid 3 are fixedly connected to the two sides of the fixing block 310. The inside of the fixing block 310 is slidably connected to the socket 311. The socket 311 is slidably connected to the inside of the mixing bucket 2. The outer wall of the socket 311 is fitted with spring two 312. The two ends of spring two 312 are fixedly connected to the inside of the socket 311 and the fixing block 310 respectively. Pull the socket 311 outward to make it slide away from the inside of the mixing bucket 2, and then move it upward to remove the bucket lid 3.

[0027] Working principle: In use, open the feed pipe 309 and add the sebacic acid crystals into the filter tank 306. Then add hydrazine hydrate, start the motor 301, which drives the eccentric wheel 302 to rotate, causing the connecting rod 303 to reciprocate and the slider 304 to slide back and forth. This, in turn, causes the insertion rod 305 and the filter tank 306 to move back and forth, thereby screening the sebacic acid crystals. The by-product crystals remain inside the filter tank 306, while the sebacic acid crystals enter the mixing tank 2. Then, start the electric heating element 202. The interior of mixing tank 2 is heated, and motor 203 is started, driving the rotating shaft 204 and stirring rod 205 to stir. After the preparation of sebacic acid dihydrazide is completed, the pin 406 is now locked inside slot 2. The through hole of the guide cylinder 404 is misaligned with the guide pipe 401 and the discharge pipe 402. Pulling the slide plate 405 outward causes the pin 406 to slide out of the slot 2 and rotate the connecting rod 403, causing the slide plate 405, pin 406, and guide cylinder 404 to rotate 90°. At this time, the pin 406 and the guide cylinder 205 are locked together. Align the slots in position one, then release the slide plate 405, causing the spring three 407 to drive the slide plate 405 back to its original position and causing the pin 406 to engage inside the slot one. This rotates the guide cylinder 404 90° so that its through hole aligns with the guide tube 401 and the discharge tube 402, thus enabling material discharge. The angle of the guide cylinder 404 can be controlled according to the actual required discharge volume. When the required discharge volume is reached, repeat the above operation to rotate the guide cylinder 404 90° and engage the pin 406 inside the slot two, so that the guide cylinder 404... 04 is enclosed between the feed pipe 401 and the discharge pipe 402; when it is necessary to clean the crystals of the by-products remaining inside the filter barrel 306, pull the socket 311 outward and let it slide out of the mixing barrel 2, then move the socket 311, the fixing block 310 and the barrel cover 3 upward, the barrel cover 3 drives the slider 304 and the insert rod 305 and the filter barrel 306 out of the mixing barrel 2, and remove the bolts and nuts between the slider 304 and the insert rod 305, so that the insert rod 305 and the filter barrel 306 can be removed for cleaning.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heating and stirring apparatus for the preparation of sebacic acid dihydrazide, comprising a support base (1), characterized in that: A mixing tank (2) is fixedly connected inside the support base (1). A lid (3) is installed inside the mixing tank (2). A motor (301) is fixedly connected to the lower surface of the lid (3). An eccentric wheel (302) is fixedly connected to the output end of the motor (301). The eccentric wheel (302) is rotatably connected inside the lid (3). A connecting rod (303) is movably connected to the outer wall of the eccentric wheel (302). A slider (304) is slidably connected inside the lid (3). The connecting rod (303) is movably connected to the slider. The outer wall of the slider (304) is fixedly connected to two sides of the outer wall of the slider (304). The slider (307) is slidably connected to the inside of the bucket lid (3). The inside of the bucket lid (3) is provided with a spring (308). The inside of the slider (304) is slidably connected to an insert rod (305). The lower surface of the insert rod (305) is fixedly connected to a filter bucket (306). The side wall and bottom of the filter bucket (306) are provided with filter holes. The pore size of the filter holes is larger than the size of sebacic acid crystals and smaller than the crystal size of the by-products.

2. The heating and stirring apparatus for preparing sebacic acid dihydrazide as described in claim 1, characterized in that: The two ends of the spring (308) are fixedly connected to the inner wall of the barrel cover (3) and the side wall of the slide rod (307), respectively. The slider (304) and the insert rod (305) are fixedly connected by bolts and nuts. The feed tube (309) is fixedly connected inside the barrel cover (3).

3. The heating and stirring apparatus for the preparation of sebacic acid dihydrazide as described in claim 1, characterized in that: A controller (201) is fixedly connected to the outer wall of the mixing tank (2). Multiple electric heating tubes (202) are installed inside the mixing tank (2). A motor (203) is fixedly connected to the lower surface of the mixing tank (2). A rotating shaft (204) is fixedly connected to the output end of the motor (203). A stirring rod (205) is fixedly connected to the outer wall of the rotating shaft (204).

4. The heating and stirring apparatus for the preparation of sebacic acid dihydrazide as described in claim 3, characterized in that: The mixing tank (2) is fixedly connected to a guide pipe (401), the outer wall of the guide pipe (401) is fixedly connected to a connecting pipe (4), the inner wall of the connecting pipe (4) is fixedly connected to a discharge pipe (402), the inner wall of the connecting pipe (4) is rotatably connected to a guide cylinder (404), and the outer wall of the guide cylinder (404) is fixedly connected to a connecting rod (403).

5. The heating and stirring apparatus for preparing sebacic acid dihydrazide as described in claim 4, characterized in that: The connecting rod (403) is rotatably connected to the inside of the connecting tube (4). A sliding plate (405) is slidably connected to the outer wall of the connecting rod (403). A pin (406) is fixedly connected to the outer wall of the sliding plate (405). The inside of the connecting tube (4) is provided with slot one and slot two. Slot one is located above the connecting rod (403), and slot two is located on the right side of the connecting rod (403). A spring three (407) is sleeved on the outer wall of the connecting rod (403). The two ends of the spring three (407) are fixedly connected to the inside of the connecting rod (403) and the sliding plate (405), respectively.

6. The heating and stirring apparatus for the preparation of sebacic acid dihydrazide as described in claim 1, characterized in that: Fixing blocks (310) are fixedly connected to both sides of the outer wall of the bucket lid (3). A socket (311) is slidably connected inside the fixing block (310). The socket (311) is slidably connected inside the mixing bucket (2). A second spring (312) is sleeved on the outer wall of the socket (311). The two ends of the second spring (312) are fixedly connected to the inside of the socket (311) and the fixing block (310) respectively.

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