N-methylpyrrolidone purification apparatus

Abstract

The utility model discloses a kind of N-methylpyrrolidone purification equipment, it is related to N-methylpyrrolidone technical field, the utility model includes bottom plate, the top outer wall of bottom plate is fixedly connected with impurity removal tank, the top inner wall of impurity removal tank is equipped with feed inlet, the top outer wall of bottom plate is fixedly connected with distillation tank, the inner wall of impurity removal tank is provided with quick release mechanism, the utility model passes through hollow pressing rod, when hollow pressing rod continuously moves downward, L plate will contract inward at this time, after a period of time, L plate will be completely recovered to chute, at this time, L plate will not be positioned to hollow insertion rod, hollow insertion rod can be immediately extracted upward, then filter plate can be taken out from impurity removal tank to clean or replace, at this time, the effect of quickly disassembling to filter plate is achieved, greatly shorten the cleaning, replacement and maintenance time of filter plate, reduce downtime, improve production continuity and equipment utilization.

Description

Technical Field

[0001] This invention belongs to the technical field of N-methylpyrrolidone, and in particular relates to an N-methylpyrrolidone purification device. Background Technology

[0002] According to the published patent CN210385107U, an N-methylpyrrolidone purification device includes a purification tank. A raw material tank is located on one side of the purification tank. Inside the purification tank, from bottom to top, a first metal filter, an ultraviolet disinfection lamp, and a second metal filter are installed sequentially. A diaphragm pump is fixedly installed on the upper surface of the raw material tank. A discharge port is fixedly installed on the lower surface of the purification tank. A control switch is fixedly installed on one side of the purification tank. A battery is fixedly installed on the rear surface of the purification tank. A rotating filter assembly is located inside the purification tank near the second metal filter. This invention solves the problems of existing N-methylpyrrolidone purification methods being relatively simple and difficult to filter heavy metal ions from N-methylpyrrolidone. Furthermore, N-methylpyrrolidone is also associated with the growth of bacteria and other microorganisms, which, if not purified, directly affect the production quality of N-methylpyrrolidone. However, it still has the following shortcomings:

[0003] The aforementioned equipment removes residual impurities from N-methylpyrrolidone upon completion, and the ultraviolet disinfection lamp can also sterilize harmful substances within N-methylpyrrolidone. However, the filter plate in the aforementioned equipment is fixedly installed, making it difficult to clean or replace the filter plate. This results in a cumbersome and time-consuming cleaning and replacement process, extending equipment downtime, which in turn affects production efficiency and increases maintenance costs. Therefore, we propose an N-methylpyrrolidone purification device. Utility Model Content

[0004] The purpose of this invention is to provide an N-methylpyrrolidone purification device. Through a quick-release mechanism and a limiting mechanism, it solves the problem that while the above-mentioned device removes residual impurities from N-methylpyrrolidone upon completion, the ultraviolet disinfection lamp can also sterilize harmful substances in N-methylpyrrolidone. However, the filter plate in the above-mentioned device is fixedly installed, which makes it difficult to clean or replace the filter plate. This makes the cleaning and replacement process cumbersome and time-consuming, resulting in prolonged equipment downtime, which in turn affects production efficiency and increases maintenance costs.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is an N-methylpyrrolidone purification device, including a base plate, a purification tank fixedly connected to the top outer wall of the base plate, a feed inlet opened on the top inner wall of the purification tank, a distillation tank fixedly connected to the top outer wall of the base plate, and a quick-release mechanism provided on the inner wall of the purification tank.

[0007] The quick-release mechanism includes an installation ring, the outer wall of which is fixedly connected to the inner wall of the impurity removal tank. The inner wall of the installation ring has several installation grooves, and the inner walls of each of the installation grooves are in contact with a filter plate. Several hollow rods are inserted into the filter plate and the inner wall of the installation ring. The outer walls of each of the hollow rods are threaded with threaded collars. The top of the inner walls of each of the hollow rods is fixedly connected with a sliding rod. The outer walls of each sliding rod are fitted with springs. The outer walls of each sliding rod are slidably connected with hollow pressing rods. A limit mechanism is provided on the bottom inner wall of the impurity removal tank.

[0008] Furthermore, the inner walls of several hollow pressing rods are slidably connected to the inner wall of the hollow insert rod, the inner walls of several hollow insert rods are provided with sliding grooves, the inner walls of several sliding grooves are fixedly connected to fixed shafts, and the outer walls of several fixed shafts are rotatably connected to L-plates, the outer walls of the L-plates being in contact with the inner walls of the hollow pressing rods.

[0009] Furthermore, the limiting mechanism includes a discharge pipe, the outer wall of which is fixedly connected to the bottom inner wall of the impurity removal tank, and a feed pipe fixedly connected to the inner wall of the distillation tank. Several bolts are inserted into the inner walls of both the discharge pipe and the feed pipe, and nuts are threaded onto the outer walls of the bolts. Several hollow fixing plates are fixedly connected to the outer wall of the distillation tank, and a bidirectional threaded rod is rotatably connected to the inner wall of the top hollow fixing plate. A fixing ring is fixedly connected to the outer wall of the bidirectional threaded rod, and several fixing holes are opened on the inner wall of the fixing ring.

[0010] Furthermore, a plug rod is slidably connected to the inner wall of the hollow fixing plate at the top, and the outer wall of the plug rod is inserted into the inner wall of the fixing hole.

[0011] Furthermore, a limit rod is fixedly connected to the inner wall of the hollow fixed plate at the bottom, and several sliding plates are threadedly connected to the outer wall of the bidirectional threaded rod.

[0012] Furthermore, the inner wall of one end of each of the sliding plates away from the insertion rod is slidably connected to the outer wall of the limiting rod, and a positioning plate is fixedly connected to the top outer wall of each of the sliding plates.

[0013] Furthermore, each of the positioning plates has a telescopic rod fixedly connected to its inner wall, and each of the telescopic rods has a spring sleeved on its outer wall.

[0014] Furthermore, a compression block is fixedly connected to the outer wall of one end of each of the telescopic rods away from the positioning plate, and the outer wall of the compression block contacts the outer wall of the nut.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model incorporates a hollow pressing rod. As the hollow pressing rod moves downwards, the L-plate retracts inwards. After a period of time, the L-plate is completely retracted into the groove. At this point, the L-plate no longer limits the hollow insert rod, allowing it to be pulled upwards. Subsequently, the filter plate can be removed from the impurity removal tank for cleaning or replacement. This achieves the effect of quick disassembly of the filter plate, significantly shortening the cleaning, replacement, and maintenance time of the filter plate, reducing downtime, and improving production continuity and equipment utilization.

[0017] 2. This utility model incorporates a positioning plate. When the positioning plate moves a certain distance, one end of the telescopic rod fixed to its inner wall will contact the outer wall of the nut through the compression block. At this time, the compression block will move downward due to the compression of the nut. During the movement, it will cause the telescopic rod to retract. When the telescopic rod retracts, it will compress the second spring. When the second spring is compressed, it will retract, thus achieving the effect of fixing and limiting the nut, preventing the nut from loosening due to mechanical vibration or impact, which could lead to the leakage of N-methylpyrrolidone.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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 schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the mounting ring structure of this utility model;

[0023] Figure 4 This is an exploded view of the hollow insert rod of this utility model;

[0024] Figure 5 This is a schematic diagram of the skateboard structure of this utility model;

[0025] Figure 6 This utility model Figure 5 Enlarged view of point A in the middle.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Base plate; 101. Impurity removal tank; 102. Feed inlet; 103. Distillation tank; 2. Quick release mechanism; 201. Mounting ring; 202. Mounting groove; 203. Filter plate; 204. Hollow insert rod; 205. Threaded collar; 206. Hollow pressing rod; 207. Slide rod; 208. Spring; 209. Slide groove; 210. L-plate; 211. Fixed shaft; 3. Limiting mechanism; 301. Discharge pipe; 302. Feed pipe; 303. Bolt; 304. Nut; 305. Hollow fixing plate; 306. Bidirectional threaded rod; 307. Fixing ring; 308. Fixing hole; 309. Insert rod; 311. Limiting rod; 312. Slide plate; 313. Positioning plate; 314. Telescopic rod; 315. Spring II; 316. Extrusion block. Detailed Implementation

[0028] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-6 As shown, this utility model is an N-methylpyrrolidone purification device, including a base plate 1. A purification tank 101 is fixedly connected to the top outer wall of the base plate 1. The purification tank 101 is used to perform preliminary filtration of N-methylpyrrolidone, thereby preventing impurities on the inner wall of N-methylpyrrolidone from clogging subsequent devices. An inlet 102 is opened on the top inner wall of the purification tank 101. N-methylpyrrolidone enters into the purification tank 101 through the inlet 102, thereby allowing the purification tank 101 to perform preliminary filtration of N-methylpyrrolidone. A distillation tank 103 is fixedly connected to the top outer wall of the base plate 1. The distillation tank 103 is used for subsequent purification of N-methylpyrrolidone. A quick-release mechanism 2 is provided on the inner wall of the purification tank 101.

[0030] The quick-release mechanism 2 includes a mounting ring 201. The outer wall of the mounting ring 201 is fixedly connected to the inner wall of the impurity removal tank 101. The mounting ring 201 is used for positioning the filter plate 203 during installation, making the installation of the filter plate 203 more convenient. The inner wall of the mounting ring 201 has several mounting grooves 202, and the inner walls of the mounting grooves 202 are in contact with the filter plate 203. The mounting grooves 202 provide initial support and positioning for the filter plate 203, thereby facilitating subsequent installation and disassembly. Several hollow insert rods 204 are inserted into both the filter plate 203 and the inner wall of the mounting ring 201. The filter plate 203 is used for N-methylpyridine... The pyrrolidone is filtered to block the impurities inside. The outer walls of several hollow inserts 204 are threaded with threaded collars 205. The top of the inner walls of several hollow inserts 204 are fixedly connected with slide rods 207. The outer walls of several slide rods 207 are fitted with springs 208. The outer walls of several slide rods 207 are slidably connected with hollow pressing rods 206. When the hollow pressing rods 206 move downward, they will simultaneously slide downward on the slide rods 207. When sliding, they will compress the springs 208. When the springs 208 are compressed, they will contract. The bottom inner wall of the impurity removal tank 101 is provided with a limit mechanism 3.

[0031] The inner walls of several hollow pressing rods 206 are slidably connected to the inner walls of hollow insert rods 204. The inner walls of several hollow insert rods 204 are provided with grooves 209, which facilitate the outward expansion and inward contraction of subsequent parts. Fixed shafts 211 are fixedly connected to the inner walls of several grooves 209. L-plates 210 are rotatably connected to the outer walls of several fixed shafts 211. The outer walls of the L-plates 210 are connected to the inner walls of the hollow pressing rods 206. When the hollow pressing rod 206 begins to move downwards, it will cause the L plate 210 to rotate through the fixed shaft 211. After rotating a certain distance, it will completely retract into the slide groove 209. The limiting mechanism 3 includes a discharge pipe 301. The outer wall of the discharge pipe 301 is fixedly connected to the bottom inner wall of the impurity removal tank 101. The inner wall of the distillation tank 103 is fixedly connected to the feed pipe 302. N-methylpyrrolidone enters the feed pipe 302 through the discharge pipe 301. In step 2, as the device moves downwards, several bolts 303 are inserted into the inner walls of both the discharge pipe 301 and the feed pipe 302. Nuts 304 are threaded onto the outer walls of the bolts 303. The discharge pipe 301 and the feed pipe 302 are connected by the bolts 303 and then locked and fixed by the nuts 304. Several hollow fixing plates 305 are fixedly connected to the outer wall of the distillation tank 103. A bidirectional threaded rod 306 is rotatably connected to the inner wall of the top hollow fixing plate 305. A fixing ring 307 is fixedly connected to the outer wall of the bidirectional threaded rod 306. Several fixing holes 308 are opened on the inner wall of the fixing ring 307. An insert rod 309 is slidably connected to the inner wall of the top hollow fixing plate 305. When the bidirectional threaded rod 306 is not in use, the insert rod 309 can be inserted into the fixing holes 308 in the fixing ring 307 to fix and limit its movement. The outer wall of the insert rod 309 is inserted into the inner wall of the fixing hole 308.

[0032] A limiting rod 311 is fixedly connected to the inner wall of the bottom hollow fixed plate 305. Several sliding plates 312 are threadedly connected to the outer wall of the bidirectional threaded rod 306. The limiting rod 311 is used to limit the sliding plates 312, thereby preventing them from deviating during use. The inner wall of the end of each sliding plate 312 away from the insert rod 309 is slidably connected to the outer wall of the limiting rod 311. Positioning plates 313 are fixedly connected to the top outer wall of each sliding plate 312. When the sliding plate 312 begins to move, it will cause the positioning plates 313 to slide through the limiting rod 311. Telescopic rods 314 are fixedly connected to the inner wall of the positioning plate 313. Springs 315 are sleeved on the outer wall of several telescopic rods 314. A pressing block 316 is fixedly connected to the outer wall of the end of several telescopic rods 314 away from the positioning plate 313. When the pressing block 316 contacts the nut 304, it will be compressed. At this time, the pressing block 316 will start to move downward. During the movement, it will drive the telescopic rods 314 to retract. During the retraction of the telescopic rods 314, it will compress the springs 315. The outer wall of the pressing block 316 contacts the outer wall of the nut 304.

[0033] One specific application of this embodiment is:

[0034] When the equipment is needed, N-methylpyrrolidone is first fed into the impurity removal tank 101 through the inlet 102. Upon entering the tank, the N-methylpyrrolidone comes into contact with the filter plate 203, which then filters it. The filtered N-methylpyrrolidone then flows through the outlet pipe 301 into the inlet pipe 302, and subsequently into the distillation tank 103 for further purification. If the filter plate 203 becomes damaged due to accumulated impurities after prolonged use, the threaded collar 205 should be rotated upwards to a suitable distance. The hollow insert rod 204 is then moved downwards a short distance, followed by the downward pressing of the hollow pressing rod 206. As the hollow pressing rod 206 begins to move downwards, it causes one end of the L-plate 210 to rotate downwards in the slide groove 209 via the fixed shaft 211. Simultaneously, the hollow pressing rod 206 slides downwards on the slide rod 207, compressing the spring 208. When the spring 208 is compressed, it contracts. As the hollow pressing rod 206 continues to move downwards, the L-plate 210 contracts inwards. After a period of time, the L-plate 210 is completely retracted into the slide groove. In slot 209, L plate 210 will no longer limit the hollow insert rod 204, allowing the hollow insert rod 204 to be pulled upwards. The filter plate 203 can then be removed from the impurity removal tank 101 for cleaning or replacement, achieving quick disassembly of the filter plate 203. After prolonged use, the discharge pipe 301 and feed pipe 302 may experience loosening of the nut 304 due to vibrations during operation. In this case, simply rotate the bidirectional threaded rod 306 after installation. When the bidirectional threaded rod 306 starts to rotate, it will drive the two sliding plates 312 to be aligned bidirectionally via the limiting rod 311. When the limiting rod 311 starts to move, it will drive the positioning plate 313 to move along the same trajectory. When the positioning plate 313 moves a certain distance, one end of the telescopic rod 314 fixed on its inner wall will contact the outer wall of the nut 304 through the pressing block 316. At this time, the pressing block 316 will move downward due to the pressing of the nut 304. During the movement, it will drive the telescopic rod 314 to retract. When the telescopic rod 314 retracts, it will press the second spring 315. When the second spring 315 is pressed, it will retract. At this time, the pressing block 316 will fix and limit the nut 304, thereby preventing the nut 304 from loosening.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An N-methylpyrrolidone purification device, comprising a base plate (1), characterized in that: The top outer wall of the base plate (1) is fixedly connected to a cleaning tank (101), the top inner wall of the cleaning tank (101) is provided with a feed inlet (102), the top outer wall of the base plate (1) is fixedly connected to a distillation tank (103), and the inner wall of the cleaning tank (101) is provided with a quick-release mechanism (2). The quick-release mechanism (2) includes a mounting ring (201). The outer wall of the mounting ring (201) is fixedly connected to the inner wall of the impurity removal tank (101). The inner wall of the mounting ring (201) has several mounting grooves (202). The inner walls of the several mounting grooves (202) are in contact with filter plates (203). Several hollow insert rods (204) are inserted into both the filter plates (203) and the inner wall of the mounting ring (201). Each hollow insert (204) has a threaded collar (205) threaded to its outer wall. Each hollow insert (204) has a slide rod (207) fixedly connected to its inner top. Each slide rod (207) has a spring (208) sleeved on its outer wall. Each slide rod (207) has a hollow pressing rod (206) slidably connected to its outer wall. The bottom inner wall of the impurity removal tank (101) is provided with a limit mechanism (3).

2. The N-methylpyrrolidone purification device according to claim 1, characterized in that, The inner walls of several hollow pressing rods (206) are slidably connected to the inner wall of hollow insert rods (204). The inner walls of several hollow insert rods (204) are provided with sliding grooves (209). The inner walls of several sliding grooves (209) are fixedly connected to fixed shafts (211). The outer walls of several fixed shafts (211) are rotatably connected to L-plates (210). The outer walls of L-plates (210) are in contact with the inner walls of hollow pressing rods (206).

3. The N-methylpyrrolidone purification device according to claim 2, characterized in that, The limiting mechanism (3) includes a discharge pipe (301), the outer wall of which is fixedly connected to the bottom inner wall of the impurity removal tank (101), the inner wall of the distillation tank (103) is fixedly connected to a feed pipe (302), and several bolts (303) are inserted into the inner walls of both the discharge pipe (301) and the feed pipe (302). Nuts (304) are threaded onto the outer walls of the bolts (303). Several hollow fixing plates (305) are fixedly connected to the outer wall of the distillation tank (103). A bidirectional threaded rod (306) is rotatably connected to the inner wall of the hollow fixing plate (305) at the top. A fixing ring (307) is fixedly connected to the outer wall of the bidirectional threaded rod (306), and several fixing holes (308) are opened on the inner wall of the fixing ring (307).

4. The N-methylpyrrolidone purification device according to claim 3, characterized in that, A plug rod (309) is slidably connected to the inner wall of the hollow fixing plate (305) at the top, and the outer wall of the plug rod (309) is inserted into the inner wall of the fixing hole (308).

5. The N-methylpyrrolidone purification device according to claim 4, characterized in that, A limit rod (311) is fixedly connected to the inner wall of the hollow fixed plate (305) at the bottom, and a plurality of sliding plates (312) are threadedly connected to the outer wall of the bidirectional threaded rod (306).

6. The N-methylpyrrolidone purification device according to claim 5, characterized in that, The inner wall of one end of each of the slide plates (312) away from the insert rod (309) is slidably connected to the outer wall of the limiting rod (311), and a positioning plate (313) is fixedly connected to the top outer wall of each of the slide plates (312).

7. The N-methylpyrrolidone purification device according to claim 6, characterized in that, The inner walls of several positioning plates (313) are fixedly connected with telescopic rods (314), and the outer walls of several telescopic rods (314) are fitted with springs (315).

8. The N-methylpyrrolidone purification device according to claim 7, characterized in that, A compression block (316) is fixedly connected to the outer wall of one end of each of the telescopic rods (314) away from the positioning plate (313), and the outer wall of the compression block (316) is in contact with the outer wall of the nut (304).

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