Filter for polyvinyl pyrrolidone production

Abstract

The utility model discloses a filter for polyvinyl pyrrolidone production, which comprises a filter shell and a filter cylinder, a top cover is arranged at the top end of the filter shell, the filter cylinder is arranged in the filter shell, a first connecting frame and a second connecting frame are arranged on the inner side of the filter shell, a top frame is arranged at the top of the filter cylinder, and a second connecting frame is arranged on the top of the filter cylinder. A bottom frame is arranged at the bottom end of the filter cylinder, the first connecting frame abuts against the top frame, the second connecting frame abuts against the bottom frame, and a waste discharging assembly is arranged on the inner wall of the filter shell. The filter overcomes the defects in the prior art, is reasonable in design and has high social use value and application prospects, and the filter cylinder is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to a filter for producing polyvinyl pyrrolidone. Background Art

[0002] In the production process of polyvinyl pyrrolidone, copper sulfate solution is artificially injected into the reactor, steam is started, the reactor is heated to about 55°C through a coil, and then the steam is turned off. Hydrogen peroxide is then dripped into the reactor through a feed tank. The reaction is exothermic, and cooling water (5°C) is turned on to control the reactor temperature to about 80°C. N-VP undergoes polymerization reaction under normal pressure to generate polyvinyl pyrrolidone. The generated polyvinyl pyrrolidone contains organic impurities and needs to be filtered, and then spray-dried to obtain the finished polyvinyl pyrrolidone.

[0003] During the filtration process, the existing filter has very complicated steps when replacing the filter element. In order to solve the above problem, we propose a polyvinyl pyrrolidone production filter that is easy to replace the filter element. Utility Model Content

[0004] In order to solve the problems mentioned in the above background technology, the utility model provides a filter for producing polyvinyl pyrrolidone.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A filter for producing polyvinyl pyrrolidone comprises a filter housing and a filter cylinder. A top cover is provided at the top of the filter housing, and the top cover can be locked and fixed by a fixed hand wheel. The filter cylinder is arranged inside the filter housing. A first connecting frame and a second connecting frame are provided inside the filter housing. A top frame is provided at the top of the filter cylinder, and a bottom frame is provided at the bottom end of the filter cylinder. The first connecting frame abuts against the top frame, and the second connecting frame abuts against the bottom frame, so that the filter cylinder can be detachably fixed inside the filter housing. A waste discharge assembly is provided on the inner wall of the filter housing.

[0007] Preferably, the first connecting frame is provided with an engaging groove, the top frame is rotatably connected with a second rotating shaft, the bottom end of the second rotating shaft is provided with a clamping block, the second rotating shaft is sleeved with a torsion spring, the top end of the second rotating shaft is provided with a rotating handle, and the top of the clamping block abuts against the bottom end of the first connecting frame.

[0008] Preferably, the top cover is rotatably connected to a first rotating shaft, an axial side wall of the first rotating shaft is provided with a connecting rod, a fixing plate is provided at the side end of the connecting rod, a brush is provided on the outer side wall of the fixing plate, and the brush abuts against the inner wall of the filter cylinder.

[0009] Preferably, the waste discharge assembly includes a fixed frame fixed to the inner wall of the filter housing, the fixed frame is rotatably connected to a threaded rod, the threaded rod is threadedly connected to a slider, the top of the slider is fixedly connected to a waste support plate through a support rod, the waste support plate is a conical structure, and the waste support plate is snap-connected to the bottom frame. Through such a design, waste residue can be collected to the top of the waste support plate, a second connecting rod is provided on the side wall of the slider, a sliding block is provided on the outer end of the second connecting rod, and the sliding block is limitedly slidably connected to the inner wall of the filter housing.

[0010] Preferably, a worm is rotatably connected to the side wall of the filter housing, a worm wheel is provided at the bottom end of the threaded rod, the worm wheel is meshingly connected to the worm, a second motor is provided on the outer side wall of the filter housing, and the output end of the second motor is fixedly connected to the worm.

[0011] Preferably, a feed inlet is provided on the side wall of the filter housing near the top end, a discharge port is provided on the side wall of the filter housing near the bottom end, and a waste outlet is provided at the bottom of the filter housing.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. If the filter cylinder needs to be removed for dredging or replacement, open the top cover, turn the handle to release the abutment between the top of the block and the bottom of the first connecting frame, lift the filter cylinder, and the block can pass through the engaging groove, and the filter cylinder can be removed. When installing the filter cylinder, just turn the handle to lower the filter cylinder. After the block passes through the engaging groove, the top of the block abuts against the bottom of the first connecting frame through the resetting action of the torsion spring, and the filter cylinder is re-fixed. The filter cylinder is convenient for disassembly and assembly, and the filter cylinder can be cleaned or replaced.

[0014] 2. The brush moves relative to the inner wall of the filter cylinder, which can sweep away the waste residue attached to the inner wall of the filter cylinder, avoid clogging the filter holes with waste residue, and improve the filtration efficiency.

[0015] 3. After the filter has been used for a period of time, the second motor is started to drive the threaded rod to rotate, thereby driving the slider to move downward, and the waste support plate moves downward accordingly. The engagement between the waste support plate and the bottom frame is released, and the filtered waste residue on the waste support plate falls to the bottom of the inner wall of the filter housing by gravity and is discharged from the waste outlet. This design facilitates the discharge of filtered waste residue from the filter and avoids the tedious step of removing the filter screen for residue discharge after a period of use.

[0016] In summary, the utility model overcomes the shortcomings of the prior art, has a reasonable design, and the filter cylinder is easy to replace, and has high social use value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the filter cylinder structure of the utility model;

[0021] Figure 4 For the utility model Figure 3 A magnified view of the structure at center;

[0022] Figure 5 This is a schematic diagram of the filter housing structure of the utility model;

[0023] Figure 6 This is a schematic diagram of the rotating shaft structure of the utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the waste discharge assembly of the utility model;

[0025] Figure 8 For the utility model Figure 7 Enlarged view of the structure at point B in the middle.

[0026] In the figure: filter housing 1, top cover 2, support frame 11, fixed hand wheel 21, feed port 111, discharge port 141, liquid chamber 14, waste outlet 112, filter cylinder 3, top frame 31, bottom frame 32, block 34, torsion spring 35, rotating handle 36, first connecting frame 12, engaging groove 121, second connecting frame 13, engaging groove 131, first rotating shaft 22, connecting rod 221, fixing plate 222, brush 223, motor 224, waste discharge assembly 4, fixing frame 401, threaded rod 41, slider 421, support rod 422, waste support plate 423, second connecting rod 424, sliding block 425, worm gear 411, worm 412, second motor 413. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0028] Reference Figure 1-8 , a filter for polyvinyl pyrrolidone production, comprising a filter housing 1 and a filter cylinder 3, a top cover 2 is provided at the top of the filter housing 1, the top cover 2 can be locked and fixed by a fixed hand wheel 21, the filter cylinder 3 is arranged inside the filter housing 1, a feed port 111 is provided on the side wall of the filter housing 1 near the top, a discharge port 141 is provided on the side wall of the filter housing 1 near the bottom, a waste outlet 112 is provided at the bottom of the filter housing 1, a first connecting frame 12 and a second connecting frame 13 are provided on the inside of the filter housing 1, a top frame 31 is provided on the top of the filter cylinder 3, a bottom frame 32 is provided at the bottom of the filter cylinder 3, the first connecting frame 12 abuts against the top frame 31, and the second connecting frame 13 abuts against the bottom frame 32, so that the filter cylinder 3 can be detachably fixed inside the filter housing 1, and a waste discharge assembly 4 is provided on the inner wall of the filter housing 1;

[0029] Furthermore, a locking groove 121 is provided on the first connecting frame 12, and a second rotating shaft is rotatably connected to the top frame 31. A clamping block 34 is provided at the bottom end of the second rotating shaft. A torsion spring 35 is sleeved on the second rotating shaft. A rotating handle 36 is provided at the top end of the second rotating shaft. The top of the clamping block 34 abuts against the bottom end of the first connecting frame 12, thereby fixing the filter cylinder 3.

[0030] When the filter cylinder 3 is damaged or blocked and affects the filtering efficiency of polyvinyl pyrrolidone, it is necessary to remove the filter cylinder 3 for unblocking or replacing. The top cover 2 is opened and the rotating handle is turned to release the abutment between the top of the block 34 and the bottom end of the first connecting frame 12. The filter cylinder 3 is lifted and the block 34 can pass through the engaging groove 121. The filter cylinder 3 can be removed. When installing the filter cylinder 3, it is only necessary to rotate the rotating handle 36 to lower the filter cylinder 3. After the block 34 passes through the engaging groove 121, the torsion spring 35 is reset to reset the top of the block 34 to abut against the bottom end of the first connecting frame 12, and the filter cylinder 3 is re-fixed. The filter cylinder 3 is convenient for disassembly and assembly, and the filter cylinder 3 can be cleaned or replaced, thereby improving the filtering efficiency. Example 2

[0031] Reference Figure 1-8The difference between this embodiment and embodiment 1 is that a first rotating shaft 22 is rotatably connected to the top cover 2, a connecting rod 221 is provided on the axial side wall of the first rotating shaft 22, a fixing plate 222 is provided on the side end of the connecting rod 221, a brush 223 is provided on the outer wall of the fixing plate 222, the brush 223 abuts against the inner wall of the filter cylinder 3, a motor 224 is provided on the top of the top cover 2, and the output end of the motor 224 is fixedly connected to the first rotating shaft 22.

[0032] The starting motor 224 drives the first rotating shaft 22 to rotate, thereby driving the brush 223 and the inner wall of the filter cylinder 3 to move relative to each other. The brush 223 can sweep away the waste residue attached to the inner wall of the filter cylinder 3 to prevent the waste residue from clogging the filter holes, thereby improving the filtering efficiency.

[0033] For other structures not described, refer to Example 1. Example 3

[0034] Reference Figure 1-8 The difference between this embodiment and embodiment 2 is that the waste discharge assembly 4 includes a fixing frame 401 fixed to the inner wall of the filter housing 1, the fixing frame 401 is rotatably connected to a threaded rod 41, the threaded rod 41 is threadedly connected to a slider 421, the top of the slider 421 is fixedly connected to a waste support plate 423 through a support rod 422, the waste support plate 423 is a conical structure, the waste support plate 423 is snap-connected to the bottom frame 32, and through such a design, waste residues can be collected to the top of the waste support plate 423, a second connecting rod 424 is provided on the side wall of the slider 421, a sliding block 425 is provided on the outer end of the second connecting rod 424, and the sliding block 425 is limitedly slidably connected to the inner wall of the filter housing 1, a worm 412 is rotatably connected to the side wall of the filter housing 1, a worm wheel 411 is provided at the bottom end of the threaded rod 41, the worm wheel 411 is meshedly connected to the worm 412, and a second motor 413 is provided on the outer wall of the filter housing 1, and the output end of the second motor 413 is fixedly connected to the worm 412.

[0035] After the filter has been used for a period of time, the second motor 413 is started to drive the threaded rod 41 to rotate, thereby driving the slider 421 to move downward, and the waste support plate 423 moves downward accordingly. The engagement between the waste support plate 423 and the bottom frame 32 is released, and the filtered waste residue on the waste support plate 423 falls to the bottom of the inner wall of the filter housing 1 by gravity and is discharged from the waste outlet 112. This design facilitates the discharge of filtered waste residue from the filter, avoids the tedious steps of removing the filter screen for residue discharge after a period of use, and greatly improves the filtration efficiency.

[0036] For other structures not described, refer to Example 2.

[0037] Working principle: In the utility model, polyvinyl pyrrolidone enters the filter cylinder 3 from the feed port 111 for filtration, and the polyvinyl pyrrolidone obtained after filtration flows out from the filter hole to the liquid chamber 14 and is discharged from the discharge port 141 for the next process, and the filter residue falls on the waste support plate 423;

[0038] The starter motor 224 drives the first rotating shaft 22 to rotate, thereby driving the brush 223 to move relative to the inner wall of the filter cylinder 3. The brush 223 can sweep away the waste residue attached to the inner wall of the filter cylinder 3 to prevent the waste residue from clogging the filter holes.

[0039] After the filter has been used for a period of time, the second motor 413 is started to drive the threaded rod 41 to rotate, thereby driving the slider 421 to move downward, and the waste support plate 423 moves downward accordingly, and the engagement between the waste support plate 423 and the bottom frame 32 is released, and the filtered waste residue on the waste support plate 423 falls to the bottom of the inner wall of the filter housing 1 by gravity and is discharged from the waste outlet 112;

[0040] When the filter cylinder 3 needs to be removed for unclogging or replacement, open the top cover 2, turn the rotating handle to release the abutment between the top of the block 34 and the bottom end of the first connecting frame 12, lift the filter cylinder 3, and the block 34 can pass through the engaging groove 121, and the filter cylinder 3 can be removed. When installing the filter cylinder 3, just turn the rotating handle 36 to lower the filter cylinder 3. After the block 34 passes through the engaging groove 121, the torsion spring 35 resets and the top of the block 34 abuts against the bottom end of the first connecting frame 12, and the filter cylinder 3 is re-fixed.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A filter for polyvinyl pyrrolidone production, comprising a filter housing (1) and a filter cylinder (3), characterized in that: The filter housing (1) has a top cover (2) at the top end, the filter cylinder (3) is arranged inside the filter housing (1), a first connecting frame (12) and a second connecting frame (13) are arranged inside the filter housing (1), a top frame (31) is arranged at the top of the filter cylinder (3), a bottom frame (32) is arranged at the bottom end of the filter cylinder (3), the first connecting frame (12) is in contact with the top frame (31), the second connecting frame (13) is in contact with the bottom frame (32), and a waste discharge assembly (4) is arranged on the inner wall of the filter housing (1).

2. A filter for polyvinyl pyrrolidone production according to claim 1, characterized in that: The first connecting frame (12) is provided with a locking groove (121), the top frame (31) is rotatably connected to a second rotating shaft, a clamping block (34) is provided at the bottom end of the second rotating shaft, a torsion spring (35) is sleeved on the second rotating shaft, a rotating handle (36) is provided at the top end of the second rotating shaft, and the top of the clamping block (34) abuts against the bottom end of the first connecting frame (12).

3. A filter for polyvinyl pyrrolidone production according to claim 1, characterized in that: The top cover (2) is rotatably connected to a first rotating shaft (22); an axial side wall of the first rotating shaft (22) is provided with a connecting rod (221); a side end of the connecting rod (221) is provided with a fixing plate (222); an outer side wall of the fixing plate (222) is provided with a brush (223); the brush (223) abuts against the inner wall of the filter cylinder (3).

4. A filter for polyvinyl pyrrolidone production according to claim 1, characterized in that: The waste discharge assembly (4) comprises a fixing frame (401) fixed to the inner wall of the filter housing (1); a threaded rod (41) is rotatably connected to the fixing frame (401); a slider (421) is threadedly connected to the threaded rod (41); a waste support plate (423) is fixedly connected to the top end of the slider (421) via a support rod (422); and the waste support plate (423) is snap-fitted and connected to the bottom frame (32).

5. A filter for polyvinyl pyrrolidone production according to claim 1, characterized in that: A worm (412) is rotatably connected to the side wall of the filter housing (1); a worm wheel (411) is provided at the bottom end of the threaded rod (41); the worm wheel (411) is meshingly connected to the worm (412); a second motor (413) is provided on the outer side wall of the filter housing (1); and an output end of the second motor (413) is fixedly connected to the worm (412).

6. A filter for polyvinyl pyrrolidone production according to claim 1, characterized in that: A feed inlet (111) is provided on the side wall of the filter housing (1) near the top end, a discharge outlet (141) is provided on the side wall of the filter housing (1) near the bottom end, and a waste outlet (112) is provided at the bottom of the filter housing (1).

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