Silica sol product purification device

Abstract

The utility model relates to the technical field of silica sol processing, and discloses a silica sol product purifying device which comprises a processing box, a supporting rack installed at the bottom of the processing box, a discharging pipe and a feeding pipe installed at the top of the processing box. A stirring and cutting assembly movably connected with the interior of the supporting rack in a sleeving mode is installed on the surface of the transmission shaft, and one end of the bottom of the transmission shaft penetrates through the bottom structure of the treatment box and extends to the outer side of the bottom of the treatment box. Kinetic energy output by the servo motor is linked to the linkage output assembly through the linkage disc, the arc-shaped toothed plate on the surface of the linkage disc and the transmission gear, and then the linkage output assembly automatically drives the cleaning and brushing plate to automatically and rotationally clean and brush the filter screen disc which is continuously filtered in a reciprocating mode. The long-time efficient filtering effect of the filter screen disc is fully ensured, and then the problems in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of silica sol processing, in particular to a silica sol product purification device. BACKGROUND

[0002] As a nanometer-sized silica dispersion liquid in water or other organic solvents, silica sol is widely used in industries such as precision casting, refractory materials, coatings, textiles, and precision polishing.

[0003] At present, in the actual use process, in order to avoid the appearance of large particles and eliminate large-diameter impurities, the prior art adopts a technical scheme combining stirring separation and filtration to purify silica sol. For example, the patent document with the application number CN202320609214.3 adopts the above technical scheme. However, when batch purification of silica sol is required, the filter screen structure used for filtration may be blocked due to prolonged use, thereby failing to meet the long-term high-efficiency operation requirements of the overall equipment. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a silica sol product purification device to solve the problems raised in the above background art.

[0005] The utility model provides the following technical scheme: a silica sol product purification device, comprising a treatment box, a support rack installed at the bottom of the treatment box, a discharge pipe, and a feeding pipe installed at the top of the treatment box. The inside of the treatment box is sleeved with a transmission shaft through a shaft seal ring. A stirring and cutting assembly is installed on the surface of the transmission shaft and movably connected to the inside of the support rack. One end of the bottom of the transmission shaft penetrates the bottom structure of the treatment box and extends to the outside of the bottom of the treatment box. A servo motor is transmissionally connected to the end of the bottom of the transmission shaft inside the support rack.

[0006] A filter screen disc, a cleaning brush plate, and a linkage output assembly are sleeved inside the discharge pipe. The two sides of the cleaning brush plate are movably connected to one side of the filter screen disc and transmissionally connected to the output end of the linkage output assembly. The input end of the linkage output assembly is sleeved with the bottom structure of the discharge pipe through a shaft seal ring and in a penetrating state. A linkage disc is sleeved with the output end of the servo motor. The input end of the linkage output assembly is transmissionally connected with a transmission gear. The inside of the linkage disc includes an arc-shaped toothed plate that can be transmissionally engaged with the transmission gear.

[0007] In particular, the stirring and cutting assembly includes a transverse cutting plate and a longitudinal cutting plate. One end of the transverse cutting plate is fixedly connected to the surface of the transmission shaft. The number of longitudinal cutting plates is not less than two and is equally arranged and installed on the surface of the transverse cutting plate. In this way, the silica sol inside the treatment box is provided with the use condition of energizing stirring and cutting.

[0008] The selected cleaning brush plate includes a support frame plate, and a plurality of flexible cleaning brush strips are arranged and installed on one side of the support frame plate to ensure intensive cleaning effect. One end of each of the flexible cleaning brush strips can be in contact with the side surface of one side of the filter screen disc. A clearance is provided between the surface of the support frame plate and the inner wall of the discharge pipe to avoid structural interference.

[0009] The selected linkage output assembly includes a bevel gear box and a double-cone protection cylinder sleeved outside the bevel gear box. The output end of the bevel gear box penetrates one side of the double-cone protection cylinder and is in transmission connection with the other side of the support frame plate. The input structure of the bevel gear box penetrates the bottom of the double-cone protection cylinder, the bottom of the discharge pipe and extends to the outside of the discharge pipe. First auxiliary sealing rings are nested at the sleeving positions of the output end and the input end of the bevel gear box and the double-cone protection cylinder to prevent the main structure of the bevel gear box from being corroded. A fixing seat is installed between the surface of the double-cone protection cylinder and the inner wall of the discharge pipe to ensure the stability of the linkage output assembly during use.

[0010] The inside of the transmission gear and the inside of the linkage disc are both provided with weight-reducing grooves to reduce the working load of the servo motor. The middle inner side of the transmission gear is in transmission connection with the input end of the bevel gear box. The number of the arc-shaped toothed plates is not less than two and they are equidistantly distributed along the circumference of the linkage disc to periodically engage the transmission gear.

[0011] The bottom of the filter screen disc is provided with a composite flow guide pipe and a composite collection assembly. The top of the composite collection assembly is sleeved inside the bottom of the composite flow guide pipe. The composite flow guide pipe includes an internally threaded sleeve, a conical pipe, an annular filter screen plate and a return pipe. One end of the conical pipe is fixedly sleeved inside the bottom of the discharge pipe. The internally threaded sleeve is sleeved outside the middle of the conical pipe. The two ends of the return pipe are sleeved inside the top of the internally threaded sleeve and the bottom of the discharge pipe, respectively. The annular filter screen plate is nested inside one end of the return pipe. The composite collection assembly cooperates with the composite flow guide pipe to collect the impurities cleaned by the cleaning brush plate without interfering with the liquid delivery of the discharge pipe.

[0012] The selected composite collection assembly includes a collection cylinder. The top structure of the collection cylinder is in threaded connection with the inner side of the internally threaded sleeve and is sleeved with the conical pipe to provide convenient installation or dismounting conditions for subsequent dismounting and cleaning of the collection cylinder.

[0013] The surface of the collecting cylinder is provided with a handle, the bottom inside of the collecting cylinder is sleeved with a drainage pipe, the bottom inside and the bottom outside of the drainage pipe are respectively embedded with an inner filter screen plate and a protective cover which is threadedly connected, and the combined assembly of the drainage pipe, the protective cover and the inner filter screen plate can provide drainage structure conditions for cleaning of the collecting cylinder in addition to maintaining the closed use of the internal space of the collecting cylinder.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1、The utility model discloses a linkage disc is provided with arc toothed plate on the surface of linkage disc, and the kinetic energy of servo motor output is linked to linkage output assembly through transmission gear, and then linkage output assembly automatic transmission cleaning and brushing plate piece is used for automatic reciprocating rotation cleaning and brushing to the filter screen disc that does not pass through, and the long time high -efficient filtering effect of filter screen disc is fully guaranteed, and then the problems existing in the prior art are solved.

[0016] 2、The utility model discloses a composite flow guide pipe spare and composite collection subassembly cooperation form collecting device, and the solution of big particle raw material and impurity that cleaning and brushing plate piece cleans and brushes can be carried out secondary flow collection through the solution that handling box is output through discharge pipe, and the improvement effect of further optimizing the filter screen disc continuous use aspect is optimized. DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the partial section schematic view of the structure of the utility model;

[0018] Figure 2 It is the front view schematic view of the structure of the utility model;

[0019] Figure 3 It is the overhead schematic view of the structure of the utility model;

[0020] Figure 4 It is the partial enlarged schematic view of the structure transverse cutting plate of the utility model;

[0021] Figure 5 It is the structure of the utility model Figure 1 It is the enlarged schematic view of A of the structure of the utility model;

[0022] Figure 6 It is the section schematic view of the composite flow guide pipe spare of the structure of the utility model.

[0023] In the figure: 1, processing box; 2, support frame; 3, servo motor; 4, transmission shaft; 5, transverse cutting plate; 6, longitudinal cutting plate; 7, feeding pipe; 8, discharge pipe; 9, filter screen disc; 10, linkage disc; 11, transmission gear; 12, linkage output assembly; 121, bevel gear box; 122, double-cone protective cylinder; 13, cleaning brush plate; 131, support frame plate; 132, flexible cleaning brush strip; 14, composite flow guide pipe; 141, internally threaded sleeve; 142, conical pipe; 143, annular filter screen plate; 144, return pipe; 15, composite collection assembly; 151, collection cylinder; 152, drainage pipe; 153, protective cover; 154, inner filter screen plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Embodiment one

[0026] Please refer to Figures 1-5 A kind of silica sol product purification device, including processing box 1, support frame 2 being installed at the bottom of processing box 1, discharge pipe 8, feeding pipe 7 being installed at the top of processing box 1, the inside of processing box 1 is equipped with transmission shaft 4 by shaft seal ring, the surface of transmission shaft 4 is equipped with stirring cutting assembly with the inside of support frame 2 movable sleeve connection, stirring cutting assembly includes transverse cutting plate 5, longitudinal cutting plate 6, one end of transverse cutting plate 5 is fixedly connected to the surface of transmission shaft 4, the setting number of longitudinal cutting plate 6 is not less than two and equidistantly arranged on the surface of transverse cutting plate 5, thereby to provide the use condition of energizing stirring division to the silica sol in the inside of processing box 1, one end of transmission shaft 4 bottom penetrates the bottom structure of processing box 1 and extends to the outside of the bottom of processing box 1, the inside of support frame 2 is equipped with servo motor 3 of transmission connection of transmission shaft 4 bottom end head;

[0027] The inside of discharge pipe 8 is equipped with filter screen disc 9, cleaning brush plate 13 and linkage output assembly 12, the two sides of cleaning brush plate 13 are respectively movably contacted with one side surface of filter screen disc 9 and transmissionally connected with the output end of linkage output assembly 12, and the input end of linkage output assembly 12 is equipped with discharge pipe 8 bottom structure through shaft seal ring and is in the state of penetration;

[0028] The cleaning brush plate 13 comprises a support frame plate 131, one side of the support frame plate 131 is arranged and mounted with a plurality of flexible cleaning brush strips 132, which can ensure intensive cleaning effect, one end of each of the plurality of flexible cleaning brush strips 132 can be in contact with the side surface of one side of the filter screen disc 9, and a clearance is arranged between the surface of the support frame plate 131 and the inner wall of the discharge pipe 8 to avoid structural interference. The linkage output assembly 12 comprises a bevel gear box 121 and a double-tapered protective cylinder 122 sleeved outside the bevel gear box 121, the output end of the bevel gear box 121 penetrates one side of the double-tapered protective cylinder 122 and is in transmission connection with the other side of the support frame plate 131, the input structure of the bevel gear box 121 penetrates the bottom of the double-tapered protective cylinder 122, the bottom of the discharge pipe 8 and extends to the outside of the discharge pipe 8 in turn, and the output end and the input end of the bevel gear box 121 are both nested with a first auxiliary sealing ring at the sleeving position of the double-tapered protective cylinder 122 to avoid corrosion of the main body structure of the bevel gear box 121, and a fixing seat is arranged between the surface of the double-tapered protective cylinder 122 and the inner wall of the discharge pipe 8 to ensure the stability of the linkage output assembly 12 during use.

[0029] The output end of the servo motor 3 is sleeved with a linkage disc 10, the input end of the linkage output assembly 12 is in transmission connection with a transmission gear 11, the inside of the linkage disc 10 comprises an arc-shaped tooth plate capable of meshing transmission with the transmission gear 11, the inside of the transmission gear 11 and the inside of the linkage disc 10 are both provided with lightening grooves to reduce the working load of the servo motor 3, the middle inner side of the transmission gear 11 is in transmission connection with the input end of the bevel gear box 121, and the number of the arc-shaped tooth plates is not less than two and is distributed equidistantly along the circumference of the linkage disc 10, so as to periodically mesh transmission with the transmission gear 11.

[0030] Working principle: when in use, the silicon sol to be treated is guided into the inside of the treatment box 1 through the feeding pipe 7, at the same time, the servo motor 3 is started to drive the transmission shaft 4, the transverse cutting plate 5 and the longitudinal cutting plate 6 to rotate synchronously, then the transverse cutting plate 5 and the longitudinal cutting plate 6 are used to stir and cut the silicon sol in the treatment box 1, and the silicon sol after stirring and cutting is guided to the next process through the discharge pipe 8, and during the guiding process, the filter screen disc 9 in the discharge pipe 8 filters the silicon sol to avoid large particles or impurities flowing into the next process.

[0031] In order to maintain the long-term high-efficiency filtering effect of the filter screen disc 9, the servo motor 3 is in transmission, the linkage disc 10 and the arc-shaped tooth plate arranged on the surface of the linkage disc 10 periodically mesh transmission with the transmission gear 11, then the transmission gear 11 drives the cleaning brush plate 13 through the linkage output assembly 12 to rotate and clean the filtering surface of the filter screen disc 9, so as to avoid the filter screen disc 9 from being blocked.

[0032] Example two

[0033] Please refer to Figures 1-6 A kind of silica sol product purification device, including processing box 1, support frame 2 installed at the bottom of processing box 1, discharge pipe 8, feeding pipe 7 installed at the top of processing box 1, the inside of processing box 1 is equipped with transmission shaft 4 by shaft seal ring, the surface of transmission shaft 4 is equipped with the stirring cutting component that is movably sleeved with the inside of support frame 2, stirring cutting component includes transverse cutting plate 5, longitudinal cutting plate 6, one end of transverse cutting plate 5 is fixedly connected to the surface of transmission shaft 4, the setting number of longitudinal cutting plate 6 is not less than two and equidistantly arranged on the surface of transverse cutting plate 5, thereby to the silica sol in the inside of processing box 1 provide energizing stirring division use condition, one end of transmission shaft 4 bottom penetrates the bottom structure of processing box 1 and extends to the outside of the bottom of processing box 1, the inside of support frame 2 is equipped with servo motor 3 that is drivingly connected to the bottom end of transmission shaft 4;

[0034] The inside of discharge pipe 8 is equipped with filter screen disc 9, cleaning brush plate piece 13 and linkage output assembly 12, the two sides of cleaning brush plate piece 13 are movably contacted with one side of filter screen disc 9 and drivingly connected with the output end of linkage output assembly 12, and the input end of linkage output assembly 12 is equipped with seal ring and penetrates the bottom structure of discharge pipe 8 and is in the state of penetration;

[0035] Cleaning brush plate piece 13 includes support frame plate 131, a plurality of flexible cleaning brush strips 132 are arranged on one side of support frame plate 131, to ensure intensive cleaning effect, one end of a plurality of flexible cleaning brush strips 132 can be in contact with the side of filter screen disc 9, and a clearance is provided between the surface of support frame plate 131 and the inner wall of discharge pipe 8 to avoid structural interference, linkage output assembly 12 includes bevel gear box 121, double-cone protection cylinder 122 sleeved on the outside of bevel gear box 121, the output end of bevel gear box 121 penetrates one side of double-cone protection cylinder 122 and is drivingly connected with the other side of support frame plate 131, the input structure of bevel gear box 121 penetrates the bottom of double-cone protection cylinder 122, the bottom of discharge pipe 8 and extends to the outside of discharge pipe 8 in sequence, and the output end and input end of bevel gear box 121 are embedded with first auxiliary sealing ring at the sleeving position of double-cone protection cylinder 122, to avoid the corrosion of the main body structure of bevel gear box 121, a fixing seat is installed between the surface of double-cone protection cylinder 122 and the inner wall of discharge pipe 8 to ensure the stability of linkage output assembly 12 during use;

[0036] The output end of the servo motor 3 is sleeved with a linkage disc 10, the input end of a linkage output assembly 12 is drivingly connected with a transmission gear 11, the inside of the linkage disc 10 comprises an arc-shaped toothed plate capable of meshing transmission with the transmission gear 11, the inside of the transmission gear 11 and the inside of the linkage disc 10 are both provided with lightening grooves, so as to reduce the operation load of the servo motor 3, the middle inside of the transmission gear 11 is drivingly connected with the input end head of a bevel gear box 121, the number of the arc-shaped toothed plates is not less than two and is equidistantly distributed along the circumference of the linkage disc 10, so as to periodically mesh transmission with the transmission gear 11;

[0037] The bottom of the filter screen disc 9 is provided with a composite flow guide pipe fitting 14 and a composite collection assembly 15, the top of the composite collection assembly 15 is sleeved on the inside of the bottom of the composite flow guide pipe fitting 14, the composite flow guide pipe fitting 14 comprises an internally threaded sleeve 141, a tapered pipe 142, an annular filter screen plate 143 and a backflow pipe 144, one end of the tapered pipe 142 is fixedly sleeved on the inside of the bottom of the discharge pipe 8, the middle inside of the internally threaded sleeve 141 is sleeved on the middle outside of the tapered pipe 142, the two ends of the backflow pipe 144 are respectively sleeved on the inside of the top of the internally threaded sleeve 141 and the inside of the bottom of the discharge pipe 8, and the annular filter screen plate 143 is embedded in the inside of one end of the backflow pipe 144, the composite collection assembly 15 cooperates with the composite flow guide pipe fitting 14 to collect the impurities brushed out by the brush plate 13 without interfering with the liquid delivery of the discharge pipe 8.

[0038] The composite collection assembly 15 comprises a collection cylinder 151, the top structure of the collection cylinder 151 is threadedly connected with the inside of the internally threaded sleeve 141 and is sleeved with the tapered pipe 142, so as to provide convenient installation or dismounting conditions for the subsequent dismounting and cleaning of the collection cylinder 151, a handle is mounted on the surface of the collection cylinder 151, so as to facilitate the subsequent dismounting and twisting force of the collection cylinder 151, a drainage pipe 152 is sleeved on the inside of the bottom of the collection cylinder 151, an inner filter screen plate 154 is embedded in the inside of the bottom of the drainage pipe 152 and a protective cover 153 is threadedly connected with the outside of the bottom of the drainage pipe 152, the assembled combination of the drainage pipe 152, the protective cover 153 and the inner filter screen plate 154 can not only keep the inside space of the collection cylinder 151 closed for use, but also provide drainage structure conditions for the cleaning of the collection cylinder 151.

[0039] Working principle: when in use, the purification treatment of the silica sol can be operated according to the technical solution disclosed in the above embodiment one;

[0040] And for further convenient collection of large particles of raw materials and impurities filtered out by the filter screen disc 9, the composite flow guide pipe 14 and the composite collection assembly 15 are arranged, and then in the subsequent use process and in the device idle maintenance process, a small flow of cleaning liquid is guided through the feeding pipe 7, at the same time, the servo motor 3 is started, and in the transmission process of the servo motor 3, the arc-shaped toothed plate arranged on the linkage disc 10 is periodically engaged with the transmission gear 11, and then the transmission gear 11 drives the cleaning brush plate 13 through the linkage output assembly 12 to rotate and clean the filter surface of the filter screen disc 9;

[0041] And the large particles of raw materials and impurities cleaned by the cleaning brush plate 13 are guided into the collection cylinder 151 through the conical pipe 142 under the synchronous conveying of the solution guided in the treatment box 1 and the discharge pipe 8, and when the cleaning liquid in the collection cylinder 151 reaches a certain amount, the conveying of the cleaning liquid is stopped, the protective cover 153 is screwed, the cleaning liquid in the collection cylinder 151 is filtered and released through the drainage pipe 152 and the inner filter screen plate 154, and the collected large particles of raw materials and impurities are temporarily stored in the collection cylinder 151, and after the cleaning liquid is recycled, the collection cylinder 151 is screwed, the collected large particles of raw materials and impurities in the collection cylinder 151 are poured out, and after cleaning, the collection cylinder 151 is reset and installed, and then the protective cover 153 is reset and installed, so that the next use can be met.

[0042] It should be noted that in this paper, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. In the drawings of the utility model, the filling pattern is only used to distinguish the layers, and is not limited in any other way.

[0043] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A device for purifying a silica sol product, comprising a treatment tank (1), a support frame (2) installed at the bottom of the treatment tank (1), a discharge pipe (8), and a feeding pipe (7) installed at the top of the treatment tank (1), characterized in that: The inside of the processing box (1) is sleeved with a transmission shaft (4) through a shaft sealing ring, the surface of the transmission shaft (4) is provided with a stirring and cutting assembly movably sleeved with the inside of a support frame (2), one end of the bottom of the transmission shaft (4) penetrates through the bottom structure of the processing box (1) and extends to the outside of the bottom of the processing box (1), and the inside of the support frame (2) is sleeved with a servo motor (3) drivingly connected with the bottom end of the transmission shaft (4); The inside of the discharge pipe (8) is sleeved with a filter screen disc (9), a cleaning brush plate (13) and a linkage output assembly (12), the two sides of the cleaning brush plate (13) are movably contacted with one side of the filter screen disc (9) and drivingly connected with the output end of the linkage output assembly (12), respectively, the input end of the linkage output assembly (12) is sleeved with the bottom structure of the discharge pipe (8) through a shaft sealing ring and is in a penetrating state, the output end of the servo motor (3) is sleeved with a linkage disc (10), the input end of the linkage output assembly (12) is drivingly connected with a transmission gear (11), and the inside of the linkage disc (10) comprises an arc-shaped tooth plate capable of meshing transmission with the transmission gear (11).

2. A device for purifying a silica sol product according to claim 1, characterized in that: The stirring and cutting assembly comprises a transverse cutting plate (5) and a longitudinal cutting plate (6), one end of the transverse cutting plate (5) is fixedly connected with the surface of the transmission shaft (4), and the longitudinal cutting plate (6) is arranged in number of not less than two and is equidistantly arranged on the surface of the transverse cutting plate (5).

3. A device for purifying a silica sol product according to claim 1, characterized in that: The cleaning brush plate (13) comprises a support frame plate (131), a plurality of flexible cleaning brush strips (132) are arranged on one side of the support frame plate (131), one end of each of the flexible cleaning brush strips (132) can be in contact with one side of the filter screen disc (9), and a clearance is arranged between the surface of the support frame plate (131) and the inner wall of the discharge pipe (8).

4. A device for purifying a silica sol product according to claim 1, characterized in that: The linkage output assembly (12) comprises a bevel gear box (121) and a double-cone protection cylinder (122) sleeved outside the bevel gear box (121), the output end of the bevel gear box (121) penetrates through one side of the double-cone protection cylinder (122) and is drivingly connected with the other side of the support frame plate (131), the input structure of the bevel gear box (121) penetrates through the bottom of the double-cone protection cylinder (122), the bottom of the discharge pipe (8) and extends to the outside of the discharge pipe (8) in sequence, and the output end and the input end of the bevel gear box (121) are both embedded with a first auxiliary sealing ring at the sleeving position of the double-cone protection cylinder (122), and a fixing seat is arranged between the surface of the double-cone protection cylinder (122) and the inner wall of the discharge pipe (8).

5. A device for purifying a silica sol product according to claim 4, characterized in that: The inside of the transmission gear (11) and the inside of the linkage disc (10) are both provided with a lightening groove, the middle inside of the transmission gear (11) is drivingly connected with the input end of the bevel gear box (121), and the number of the arc-shaped tooth plates is not less than two and is equidistantly distributed along the circumference of the linkage disc (10).

6. A device for purifying a silica sol product according to claim 1, characterized in that: The bottom of the filter screen disc (9) is provided with a composite flow guide pipe fitting (14) and a composite collection assembly (15), the top of the composite collection assembly (15) is sleeved on the inside of the bottom of the composite flow guide pipe fitting (14), the composite flow guide pipe fitting (14) comprises an internally threaded sleeve (141), a tapered pipe (142), an annular filter screen plate (143) and a reflux pipe (144), one end of the tapered pipe (142) is fixedly sleeved on the inside of the bottom of the discharge pipe (8), the middle inside of the internally threaded sleeve (141) is sleeved on the middle outside of the tapered pipe (142), the two ends of the reflux pipe (144) are respectively sleeved on the inside of the top of the internally threaded sleeve (141) and the inside of the bottom of the discharge pipe (8), and the annular filter screen plate (143) is embedded in the inside of one end of the reflux pipe (144).

7. A device for purifying a silica sol product according to claim 6, characterized in that: The composite collection assembly (15) comprises a collection cylinder (151), the top structure of the collection cylinder (151) is in threaded connection with the inside of the internally threaded sleeve (141) and is sleeved on the tapered pipe (142).

8. A device for purifying a silica sol product according to claim 7, characterized in that: A handle is mounted on the surface of the collection cylinder (151), a drainage pipe (152) is sleeved on the inside of the bottom of the collection cylinder (151), an inner filter screen plate (154) is embedded in the inside of the bottom of the drainage pipe (152) and a protective cover (153) is in threaded connection with the outside of the bottom of the drainage pipe (152).

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