Ultrafiltration device for producing adblue

Abstract

The utility model relates to an ultrafiltration device for producing adblue, which comprises a rack, and further comprises a filter box communicated with a water inlet, a filter plate and a driving mechanism, the filter box is horizontally arranged and located on the rack, the bottom of the filter box is connected with the rack, a filter cavity is horizontally formed in the filter box, a water inlet hole is formed in the top of the filter box, and a water outlet hole is formed in the bottom of the filter box. The side wall of the filter box is provided with a transmission hole through which the filter plate can penetrate, the transmission hole is horizontally arranged and communicated with the filter cavity, the filter plate is horizontally arranged and located in the filter cavity, the filter plate is located above the transmission hole, the side wall of the filter plate is in contact with the side wall of the filter cavity, and the driving mechanism is located on the filter box. The driving mechanism is connected with the filter plate and used for driving the filter plate to be separated from the filter box after passing through the transmission hole. The device has the advantages that impurities and solid particles are not prone to blocking the ultrafiltration membrane set, and the cost of maintaining the ultrafiltration membrane set is reduced.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to an ultrafiltration device for producing automotive urea. Background Art

[0002] Automotive urea is usually made from urea solution, and its production process is usually treated and concentrated using an ultrafiltration device. An ultrafiltration device is a membrane separation technology device used to separate and concentrate macromolecular substances in a solution. The ultrafiltration device uses a special ultrafiltration membrane as a filter medium. By applying pressure, macromolecular substances such as proteins and polymers are retained on the membrane, while small molecules and solvents are separated through the membrane pores.

[0003] The Chinese utility model patent with authorization announcement number CN211328943U discloses an ultrafiltration membrane group for ultrafiltration treatment of high turbidity wastewater, including a filter cartridge, a water inlet pipe connected to the water inlet of the filter cartridge, a source water pump connected to the water inlet pipe, a water outlet pipe connected to the water outlet of the filter cartridge and a water tank connected to the water outlet pipe, a backwash pump is provided between the water tank and the filter cartridge, a circulation pipe is provided at the concentrate return port of the filter cartridge, one end of the circulation pipe is connected to the concentrate return port, and the other end is connected to the water inlet pipe, and a circulation pump is provided on the circulation pipe; the concentrate return port is also connected to a first sewage pipe, the first sewage pipe is arranged in parallel with the circulation pipe, and a first sewage valve is provided.

[0004] The ultrafiltration membrane group for the above-mentioned wastewater ultrafiltration treatment has a large volume of impurities and solid particles in the solution. When the solution passes through the ultrafiltration membrane group, impurities and solid particles are easy to clog the ultrafiltration membrane group, which requires staff to maintain the ultrafiltration membrane assembly, thereby increasing maintenance costs. Utility Model Content

[0005] In order to reduce the clogging of the ultrafiltration membrane group by impurities and solid particles and reduce the cost of maintaining the ultrafiltration membrane group, the present application provides an ultrafiltration device for the production of automotive urea.

[0006] The present application provides an ultrafiltration device for producing automotive urea, which adopts the following technical solution:

[0007] An ultrafiltration device for producing automotive urea comprises a frame, and also comprises a filter box connected to a water inlet, a filter plate and a driving mechanism, wherein the filter box is horizontally arranged and located on the frame, and the bottom of the filter box is connected to the frame, a filter cavity is provided in the filter box, and the filter cavity is horizontally arranged, a water inlet is provided on the top of the filter box, and the water inlet is vertically arranged and connected to the filter cavity, a transmission hole for the filter plate to pass through is provided on the side wall of the filter box, and the transmission hole is horizontally arranged and connected to the filter cavity, the filter plate is horizontally arranged and located in the filter cavity, the filter plate is located above the transmission hole, and the side wall of the filter plate contacts the side wall of the filter cavity, and the driving mechanism is located on the filter box, and the driving mechanism is connected to the filter plate and is used to drive the filter plate to detach from the filter box after passing through the transmission hole.

[0008] By adopting the above technical scheme, before the solution is transmitted to the ultrafiltration membrane group through the water inlet hole, the staff transmits the solution to the filter box after passing through the water inlet hole, and the impurities and solid particles and other dirt in the solution are reduced through the filtering effect of the filter plate in the filter cavity, so that it is not easy to clog the ultrafiltration membrane group, thereby eliminating the need for the staff to frequently disassemble and replace the ultrafiltration membrane group, reducing the maintenance cost of the ultrafiltration membrane group. When dirt accumulates on the filter plate, the filter plate is detached from the filter box after passing through the transmission hole through the driving mechanism, thereby facilitating the staff to disassemble and replace the filter plate, further reducing the dirt in the solution.

[0009] Preferably, a support plate is provided in the filter cavity, the support plate is horizontally arranged and contacts the side wall of the filter cavity, a support groove is provided on the support plate, the support groove penetrates the support plate in a vertical direction, the side wall of the support groove contacts the side wall of the filter plate, the driving mechanism comprises a driving plate, a lifting member and a driving source, the driving plate is vertically arranged and located in the filter cavity, the driving plate is located on the side of the filter plate away from the transmission hole, the lifting member is located at the bottom of the support plate, the lifting member is connected to the support plate and is used to lift the support plate in the vertical direction, the side wall of the driving plate contacts the side wall of the filter cavity, the driving source is located on the side wall of the filter box, the driving source is connected to the driving plate and is used to move the driving plate in a direction close to or away from the transmission hole.

[0010] By adopting the above technical solution, the support plate supports the filter plate, and the filter plate is located in the support groove. When impurities, solid particles and other dirt on the filter plate accumulate on the filter plate, the staff starts the lifting member, so that the support plate drives the filter plate to rise and fall to the set position, and then the staff starts the driving source to move the driving plate in the horizontal direction, thereby driving the support plate and the filter plate to move synchronously. Finally, the support plate and the filter plate are separated from the filter box through the transmission hole, so that it is convenient for the staff to disassemble and replace the filter plate.

[0011] Preferably, a lifting groove is provided at the bottom of the support plate, and the lifting groove is horizontally arranged. The lifting member includes a lifting block and a lifting rod. The lifting block is horizontally arranged and located at the bottom of the support plate. The top of the lifting block extends into the lifting groove and contacts the side wall of the lifting groove. The lifting rod is vertically arranged, and the bottom of the lifting rod is connected to the bottom of the filter chamber. A transmission member is provided on the lifting rod, and the transmission member is located at the top of the lifting rod. The transmission member is connected to the lifting block and is used to drive the lifting block to rise and fall.

[0012] By adopting the above technical solution, the lifting rod supports the transmission member. The staff adjusts the transmission member to make the lifting block move along the circumference of the lifting rod. Through the lifting groove, the support plate and the lifting block move synchronously, thereby driving the support plate and the filter plate to move synchronously, making it convenient for the staff to take out the filter plate.

[0013] Preferably, a thread groove is coaxially opened on the top of the lifting rod, and the thread groove is vertically arranged. The transmission member includes a driving motor and a screw. The driving motor is located at the bottom of the filter box and is connected to the filter box. The output shaft of the driving motor is coaxially connected to the lifting rod, and the screw is coaxially arranged with the lifting rod. One end of the screw is connected to the bottom of the lifting block, and the other end of the screw extends into the thread groove and is threadedly connected to the thread groove.

[0014] By adopting the above technical solution, the staff starts the driving motor, and the output shaft of the driving motor rotates to drive the lifting rod to rotate synchronously. The screw is threadedly connected to the thread groove, so that the screw is lifted and lowered along the axial direction of the lifting rod, thereby driving the lifting block to lift and lower synchronously, so that it is convenient for the staff to adjust the height of the support plate and the filter plate, and then it is convenient for the staff to disassemble and replace the filter plate through the transmission hole.

[0015] Preferably, the driving source includes a cylinder and a driving rod, the cylinder is located on the side wall of the filter box, the cylinder body of the cylinder is connected to the side wall of the filter box, the piston rod of the cylinder is horizontally arranged, the piston rod of the cylinder is connected to the driving rod, the driving rod is horizontally arranged, one end of the driving rod passes through the side wall of the filter box and extends into the filter cavity and is connected to the driving plate.

[0016] By adopting the above technical solution, when the support plate and the filter plate are lifted or lowered to the set height in the vertical direction, the staff starts the cylinder, and the piston rod of the cylinder is extended and retracted to drive the driving rod to move synchronously, so that the driving plate is driven by the driving rod and the driving plate moves synchronously in the horizontal direction, thereby driving the support plate and the filter plate to move synchronously, making it convenient for the staff to disassemble and replace the filter plate.

[0017] Preferably, a slope and a brush are provided at the top of the driving plate, the slope is vertically arranged with the inclined surface of the slope facing the filter plate, the top of the slope contacts the top of the filter chamber, the bottom of the slope is connected to the top of the driving plate, the brush is located at the top of the slope, the bottom of the brush is connected to the slope, and the top of the brush contacts the top wall of the filter chamber.

[0018] By adopting the above technical solution, when the driving plate moves in the horizontal direction, the brush contacts the top wall of the filter chamber to clean the dirt on the top wall of the filter chamber. Driven by its own gravitational potential energy, the dirt is transmitted to the inclined surface of the slope, and falls onto the filter plate after passing the inclined surface of the slope, thereby reducing the dirt on the top wall of the filter chamber.

[0019] Preferably, a cover plate is provided on the side wall of the filter box, the cover plate is vertically arranged, the cover plate is detachably connected to the side wall of the filter box, and the cover plate is used to cover the transmission hole.

[0020] By adopting the above technical solution, the cover plate is used to cover the transmission hole, so that when the filter box transmits the solution, the solution is not easy to overflow from the transmission hole, and the cover plate is detachably connected to the side wall of the transmission hole, so that when dirt accumulates on the filter plate, it is convenient for the staff to remove the cover plate and then remove and replace the filter plate.

[0021] Preferably, a ball is provided on the top of the lifting block, one side of the ball is connected to the lifting block, and the other side of the ball is in contact with the top of the lifting groove.

[0022] By adopting the above technical solution, the ball converts the sliding friction between the lifting block and the lifting groove into rolling friction, thereby reducing the friction between the lifting block and the lifting groove, and further reducing the wear between the lifting block and the lifting groove, thereby extending the service life of the lifting block.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Before the solution is transmitted to the water inlet, the staff transmits the solution to the filter box through the water inlet hole. Through the filtering effect of the filter plate in the filter cavity, impurities and solid particles in the solution are not easily transmitted to the filter plate, thereby reducing the dirt in the solution, and then making it difficult for the dirt to clog the ultrafiltration membrane group, so that the staff does not need to frequently disassemble and replace the ultrafiltration membrane group, reducing the maintenance cost of the staff;

[0025] 2. When impurities and solid particles in the solution accumulate on the filter plate, the staff disassembles and removes the cover plate, and then uses the lifting member to lift the filter plate to the set height. The staff then uses the driving source to move the driving plate synchronously in the horizontal direction, so that the support plate and the filter plate move synchronously, which makes it convenient for the staff to disassemble and replace the filter plate;

[0026] 3. One side of the ball is connected to the top of the lifting block, and the other side of the ball is in contact with the top wall of the lifting slot, thereby converting the sliding friction between the lifting block and the lifting slot into rolling friction, thereby reducing the wear between the lifting block and the support plate and extending the service life of the lifting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic diagram of the overall structure of an ultrafiltration device for producing automotive urea.

[0028] Figure 2 An exploded schematic diagram of a portion of the structure of an ultrafiltration device for the production of automotive urea, mainly showing the transmission holes.

[0029] Figure 3 It is a partial structural diagram of an ultrafiltration device for producing automotive urea, mainly showing the filter cavity.

[0030] Figure 4 It is a cross-sectional schematic diagram of a partial structure of an ultrafiltration device for producing automotive urea, mainly showing the lifting tank.

[0031] Figure 5 It is an exploded schematic diagram of a part of the structure of an ultrafiltration device for the production of automotive urea, mainly showing the thread groove.

[0032] Explanation of the accompanying drawings: 1. Frame; 11. Valve; 12. Connecting pipe; 13. Connecting cylinder; 2. Filter box; 21. Water inlet hole; 22. Filter chamber; 23. Transmission hole; 24. Filter plate; 25. Ball; 3. Support plate; 31. Support groove; 32. Lifting groove; 41. Drive plate; 42. Lifting member; 421. Lifting block; 422. Lifting rod; 43. Drive source; 431. Cylinder; 432. Drive rod; 5. Transmission member; 51. Drive motor; 52. Screw; 6. Threaded groove; 7. Cover plate; 71. Seal; 81. Ramp; 82. Brush. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0034] The embodiment of the present application discloses an ultrafiltration device for producing automotive urea.

[0035] Reference Figure 1 and Figure 2, an ultrafiltration device for producing automotive urea includes a filter box 2, a connecting pipe 12, a connecting tube 13 and an ultrafiltration membrane group located on a frame 1, the horizontally arranged filter box 2 is fixedly connected to the frame 1, a water inlet hole 21 and a filter cavity 22 are opened on one side of the filter box 2 along the transmission direction of the solution, the vertically arranged water inlet hole 21 is located at the top of the filter box 2, and a filter cavity 22 is opened at the bottom of the water inlet hole 21, the horizontally arranged filter cavity 22 is connected with the water inlet hole 21, a filter plate 24 is arranged in the filter box 2, and the horizontally arranged filter plate 24 is in contact with the side wall of the filter cavity 22; a connecting rod is located at the bottom of the filter box 2, one end of the connecting rod is connected to the bottom of the filter box 2, and the other end of the filter box 2 is connected to the connecting tube 13, the vertically arranged connecting tube 13 is located on one side of the filter box 2, and the bottom of the connecting tube 13 is fixedly connected to the frame 1, the ultrafiltration membrane group is located in the connecting tube 13, and the ultrafiltration membrane group is in contact with the solution after passing through the filter box 2.

[0036] The solution is transmitted from the water inlet 21 to the filter plate 24 in the filter box 2, and then passes through the connecting pipe 12, is transmitted to the connecting cylinder 13, passes through the ultrafiltration membrane group, and is transmitted to the set position, so as to facilitate subsequent processing of the solution. Under the filtering action of the filter plate 24, impurities, solid particles and other pollutants in the solution are reduced, so that impurities, solid particles and other pollutants are not easy to clog the ultrafiltration membrane group and affect the normal use of the ultrafiltration membrane group, so that the staff does not need to frequently replace the ultrafiltration membrane group, reducing maintenance costs.

[0037] Reference Figure 2 and Figure 3 A valve 11 is installed on the top of the filter box 2, and the bottom of the valve 11 is connected to the water inlet 21, so that the solution passes through the valve 11 and then passes through the water inlet 21 to the filter box 2, thereby controlling the on and off of the filter box 2. A transmission hole 23 for the filter plate 24 to pass through is opened on the side wall of the filter box 2. The horizontally arranged transmission hole 23 is connected to the filter cavity 22. A cover plate 7 and a sealing member 71 are installed on the side wall of the filter box 2. The vertically arranged cover plate 7 is detachably connected to the side wall of the filter box 2 by bolts. The cover plate 7 is used to cover the transmission hole 23. The sealing member 71 is located on the side wall of the cover plate 7. The sealing member 71 is made of rubber material. One side of the sealing member 71 is bonded to the side wall of the cover plate 7, and the other side of the sealing member 71 is used to contact the side wall of the transmission hole 23, thereby improving the sealing performance of the filter box 2, so that the solution is not easy to spill out of the transmission hole 23.

[0038] Reference Figure 3 , Figure 4 and Figure 5A support plate 3 and a driving mechanism 4 are installed in the filter chamber 22. The horizontally arranged support plate 3 is located in the filter chamber 22, and a support groove 31 is provided on the support plate 3. The support groove 31 penetrates the support plate 3 in the vertical direction, and the support groove 31 is I-shaped. The side wall of the support groove 31 is in contact with the side wall of the filter plate 24. A lifting groove 32 is provided at the bottom of the support plate 3, and the horizontally arranged lifting groove 32 is T-shaped.

[0039] The driving mechanism 4 includes a driving plate 41, a driving source 43 and a lifting member 42. The driving plate 41 is vertically arranged and located in the filter chamber 22. The driving plate 41 is located on the side of the filter plate 24 away from the transmission hole 23. A slope 81 and a brush 82 are installed on the top of the driving plate 41. The inclined surface of the vertically arranged slope 81 faces the filter plate 24. The top of the slope 81 contacts the top of the filter chamber 22. The bottom of the slope 81 is fixedly connected to the top of the driving plate 41. The brush 82 is located at the top of the slope 81. The bottom of the brush 82 is fixedly connected to the slope 81. The top of the brush 82 contacts the top wall of the filter chamber 22. Therefore, when the driving plate 41 moves in the horizontal direction, the brush 82 cleans the dirt on the top wall of the filter chamber 22. The dirt is transmitted to the inclined surface of the slope 81 and finally to the filter plate 24 under the drive of its own gravitational potential energy.

[0040] The driving source 43 includes a cylinder 431 and a driving rod 432. The cylinder 431 is located on the side wall of the filter box 2. The cylinder body of the cylinder 431 is connected to the side wall of the filter box 2. The piston rod of the cylinder 431 is horizontally arranged. The piston rod of the cylinder 431 is connected to the driving rod 432. The driving rod 432 is horizontally arranged. One end of the driving rod 432 passes through the side wall of the filter box 2 and extends into the filter cavity 22 and is fixedly connected to the side wall of the driving plate 41.

[0041] The lifting member 42 includes a lifting block 421 and a lifting rod 422, and a transmission member 5 is installed on the lifting rod 422, and the transmission member 5 includes a driving motor 51 and a screw 52. The horizontally arranged lifting block 421 is T-shaped, and the lifting block 421 is located at the bottom of the support plate 3, and the top of the lifting block 421 extends into the lifting groove 32 and contacts the side wall of the lifting groove 32. A ball 25 is installed on the top of the lifting block 421, and one side of the ball 25 is rotatably connected to the top of the lifting block 421, and the other side of the ball 25 contacts the top wall of the lifting groove 32, thereby reducing wear and extending the service life of the lifting block 421.

[0042] The bottom of the vertically arranged lifting rod 422 is rotatably connected to the bottom of the filter chamber 22, and the top of the lifting rod 422 is coaxially provided with a thread groove 6, which is arranged vertically. The driving motor 51 is located at the bottom of the filter box 2 and is fixedly connected to the filter box 2, and the output shaft of the driving motor 51 is coaxially fixedly connected to the bottom of the lifting rod 422, the screw 52 is coaxially arranged with the lifting rod 422, and one end of the screw 52 extends into the thread groove 6 and is threadedly connected to the thread groove 6, and the other end of the screw 52 is rotatably connected to the bottom of the lifting block 421 through a bearing.

[0043] When impurities, solid particles and other dirt accumulate on the filter plate 24, the staff starts the drive motor 51, and the output shaft of the drive motor 51 rotates to drive the lifting rod 422 to rotate synchronously, and the screw 52 is threadedly connected with the thread groove 6 on the lifting rod 422, so that the lifting rod 422 rotates to drive the screw 52 to rise and fall in the vertical direction, thereby driving the lifting block 421, the support plate 3 and the filter plate 24 to rise and fall synchronously with the screw 52 until the support plate 3 and the filter plate 24 are at the transmission hole 23 of the lifting shaft. The staff adjusts the cover plate 7 so that the cover plate 7 is separated from the transmission hole 23, and the staff Start the cylinder 431 again, and the piston rod of the cylinder 431 will extend and retract to drive the driving rod 432 to move synchronously, so that the driving plate 41 can move synchronously along the axial direction of the driving rod 432, thereby pushing the support plate 3 and the filter plate 24 to move in a direction away from the cylinder 431 until the support plate 3 and the filter plate 24 pass through the transmission hole 23. The staff then manually removes the filter plate 24 and the support plate 3, thereby facilitating the staff to disassemble and replace the filter plate 24, thereby reducing impurities, solid particles and other contaminants in the solution, thereby eliminating the need for frequent replacement of the ultrafiltration membrane group and saving maintenance costs.

[0044] The implementation principle of the ultrafiltration device for producing automotive urea in an embodiment of the present application is as follows: the staff allows the solution to pass through the valve 11, the filter box 2, the filter plate 24 and the connecting pipe 12 in sequence, and then transmits it to the ultrafiltration membrane group in the connecting cylinder 13, so as to filter impurities and solid particles and other pollutants in the solution, so that the impurities and solid particles and other pollutants are not easy to clog the ultrafiltration membrane group.

[0045] When impurities, solid particles and other dirt accumulate on the filter plate 24, the staff first closes the valve 11 to prevent the solution from entering the filter box 2. The staff then starts the drive motor 51. The output shaft of the drive motor 51 rotates to drive the lifting rod 422 to rotate synchronously. The screw 52 is threadedly connected to the threaded groove 6 on the lifting rod 422. The screw 52 moves along the axial direction of the lifting rod 422, thereby driving the lifting block 421 to rise and fall synchronously. Through the lifting groove 32, the support plate 3 and the filter plate 24 are lifted to the set position. The staff then starts the cylinder 431. The piston rod of the cylinder 431 is extended and retracted to drive the drive rod 432 to move synchronously, so that the drive plate 41 moves in a direction close to the transmission hole 23, thereby pushing the support plate 3 and the filter plate 24 to move synchronously. Finally, the filter plate 24 and the support plate 3 are separated from the filter box 2 after passing through the transmission hole 23, thereby facilitating the staff to disassemble and replace the filter plate 24.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ultrafiltration device for producing automotive urea, comprising a frame (1), characterized in that: It also comprises a filter box (2) connected to the water inlet, a filter plate (24) and a driving mechanism, wherein the filter box (2) is arranged horizontally and located on the frame (1), the bottom of the filter box (2) is connected to the frame (1), a filter chamber (22) is provided in the filter box (2), the filter chamber (22) is arranged horizontally, a water inlet hole (21) is provided on the top of the filter box (2), the water inlet hole (21) is arranged vertically and connected to the filter chamber (22), and a filter plate (24) is provided on the side wall of the filter box (2) for the filter plate (24) to pass through. 4) passing through a transmission hole (23), the transmission hole (23) being arranged horizontally and communicating with the filter cavity (22), the filter plate (24) being arranged horizontally and located in the filter cavity (22), the filter plate (24) being located above the transmission hole (23), the side wall of the filter plate (24) being in contact with the side wall of the filter cavity (22), the driving mechanism being located on the filter box (2), the driving mechanism being connected to the filter plate (24) and being used for driving the filter plate (24) to separate from the filter box (2) after passing through the transmission hole (23).

2. The ultrafiltration device for producing automotive urea according to claim 1, characterized in that: A support plate (3) is arranged in the filter cavity (22); the support plate (3) is arranged horizontally and contacts the side wall of the filter cavity (22); a support groove (31) is provided on the support plate (3); the support groove (31) penetrates the support plate (3) in a vertical direction; the side wall of the support groove (31) contacts the side wall of the filter plate (24); the drive mechanism comprises a drive plate (41), a lifting member (42) and a drive source (43); the drive plate (41) is arranged vertically and is located in the filter cavity (22); the drive plate ( The filter box (24) is provided with a filter element (41) which is located on a side of the filter plate (24) away from the transmission hole (23); the lifting member (42) is located at the bottom of the support plate (3); the lifting member (42) is connected to the support plate (3) and is used to lift the support plate (3) in a vertical direction; the side wall of the drive plate (41) is in contact with the side wall of the filter cavity (22); the drive source (43) is located on the side wall of the filter box (2); the drive source (43) is connected to the drive plate (41) and is used to move the drive plate (41) in a direction close to or away from the transmission hole (23).

3. The ultrafiltration device for producing automotive urea according to claim 2, characterized in that: A lifting groove (32) is provided at the bottom of the support plate (3), and the lifting groove (32) is arranged horizontally. The lifting member (42) comprises a lifting block (421) and a lifting rod (422). The lifting block (421) is arranged horizontally and is located at the bottom of the support plate (3). The top of the lifting block (421) extends into the lifting groove (32) and contacts the side wall of the lifting groove (32). The lifting rod (422) is arranged vertically, and the bottom of the lifting rod (422) is connected to the bottom of the filter chamber (22). A transmission member (5) is provided on the lifting rod (422), and the transmission member (5) is located at the top of the lifting rod (422). The transmission member (5) is connected to the lifting block (421) and is used to drive the lifting block (421) to move up and down.

4. The ultrafiltration device for producing automotive urea according to claim 3, characterized in that: A thread groove (6) is coaxially formed on the top of the lifting rod (422), and the thread groove (6) is arranged vertically. The transmission member (5) comprises a driving motor (51) and a screw rod (52). The driving motor (51) is located at the bottom of the filter box (2) and is connected to the filter box (2). The output shaft of the driving motor (51) is coaxially connected to the lifting rod (422). The screw rod (52) is coaxially arranged with the lifting rod (422). One end of the screw rod (52) is connected to the bottom of the lifting block (421), and the other end of the screw rod (52) extends into the thread groove (6) and is threadedly connected to the thread groove (6).

5. The ultrafiltration device for producing automotive urea according to claim 2, characterized in that: The driving source (43) comprises a cylinder (431) and a driving rod (432); the cylinder (431) is located on the side wall of the filter box (2); the cylinder body of the cylinder (431) is connected to the side wall of the filter box (2); the piston rod of the cylinder (431) is arranged horizontally; the piston rod of the cylinder (431) is connected to the driving rod (432); the driving rod (432) is arranged horizontally; one end of the driving rod (432) passes through the side wall of the filter box (2) and then extends into the filter cavity (22) and is connected to the driving plate (41).

6. The ultrafiltration device for producing automotive urea according to claim 2, characterized in that: A slope (81) and a brush (82) are provided at the top of the driving plate (41); the slope (81) is arranged vertically and the inclined surface of the slope (81) faces the filter plate (24); the top of the slope (81) contacts the top of the filter cavity (22); the bottom of the slope (81) is connected to the top of the driving plate (41); the brush (82) is located at the top of the slope (81); the bottom of the brush (82) is connected to the slope (81); and the top of the brush (82) contacts the top wall of the filter cavity (22).

7. The ultrafiltration device for producing automotive urea according to claim 1, characterized in that: A cover plate (7) is arranged on the side wall of the filter box (2); the cover plate (7) is arranged vertically, the cover plate (7) is detachably connected to the side wall of the filter box (2), and the cover plate (7) is used to cover the transmission hole (23).

8. The ultrafiltration device for producing automotive urea according to claim 3, characterized in that: A ball (25) is provided on the top of the lifting block (421); one side of the ball (25) is connected to the lifting block (421), and the other side of the ball (25) is in contact with the top of the lifting groove (32).

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