Filtering concentrator

Abstract

A filter element mounting structure is adopted in a filter device of the filter concentrator, the filter element mounting structure comprises a filter element mounting pipe, a plurality of filter element mounting pipe side joints are arranged on the filter element mounting pipe, and the filter element side joints are arranged at the end part of a filter element; each filter element side connector is provided with an axial through hole capable of containing the corresponding filter element installation pipe side connector, the inner side end of each axial through hole is communicated with an inner cavity of the corresponding filter element, and the outer side end of each axial through hole extends to the end face of the corresponding filter element side connector. An inner threaded hole is formed in the hole channel of the axial through hole close to the inner side end, and a counterbore is formed in the hole channel close to the outer side end; the filter element installation pipe side connector is provided with a pipe nozzle capable of being contained in the corresponding axial through hole, an outer threaded rod matched with the corresponding inner threaded hole is formed in the outlet position of the pipe nozzle, a sealing ring installation flange matched with the corresponding counter bore is formed in the root position of the pipe nozzle, and the sealing ring installation flange is sleeved with a sealing ring. The problem that the threads are eroded by stock solution and impurities is solved, and the filter element is convenient to install and replace.

Description

Technical Field

[0001] This utility model relates to a filter element installation structure and a filter concentrator. The filter concentrator is suitable for filtering the liquid following the crystallization reaction of secondary battery cathode material precursors, such as the co-precipitation reaction of ternary precursors, thereby concentrating the crystalline particles. Background Technology

[0002] A filtration concentrator is a device that integrates filtration and concentration functions. It is suitable for filtering the liquid after the crystallization reaction of secondary battery cathode material precursors, such as the co-precipitation reaction of ternary precursors, thereby concentrating the crystalline particles. The applicant disclosed in patent document CN116078332A that the filtration concentrator includes: a cylinder, a stirring device, and a filtration device; the stirring device includes a drive assembly, a rotating shaft assembly, and a blade assembly; the drive assembly is mounted on the upper end face of the cylinder; the upper end of the rotating shaft assembly is connected to the drive assembly, and the lower end extends into the cylinder; the blade assembly is mounted on the rotating shaft assembly; the filtration device includes at least one set of filter elements, which are installed inside the cylinder and located beside the rotating shaft assembly and / or the blade assembly; the at least one set of filter elements is connected to a clear liquid output pipeline, and the clear liquid is output... The pipeline extends to the outside of the cylinder. The filtration device employs a filter element mounting structure, which includes a filter element mounting pipe extending circumferentially along the inner wall of the filtration concentrator cylinder. This mounting pipe has a clear liquid output structure and multiple filter element mounting pipe side connectors spaced apart along its length. These side connectors are used to install filter elements and guide the clear liquid output from the corresponding filter element into the mounting pipe for discharge through the clear liquid output section. Each filter element has a side connector at its end, which is adapted to and connected to the corresponding side connector of the filter element mounting pipe. The aforementioned filtration concentrator uses a stirring device inside the cylinder to stir the raw liquid while simultaneously filtering and separating it through the filter elements. The filter element mounting structure directly affects the filtration effect and operational reliability of the equipment.

[0003] In existing filter cartridge installation structures for filtration concentrators, the filter cartridge side connector typically uses an external thread structure, which mates with the internal threaded hole on the filter cartridge mounting tube side connector. During use, the following problems have been found with this filter cartridge installation structure: First, the raw liquid outside the filter cartridge directly contacts the threaded connection, making leakage at the threaded joint easy. Especially when the stirring device is operating, the agitation of the shaft assembly and impeller assembly generates pressure fluctuations, exacerbating the risk of leakage. Impurities in the raw liquid outside the filter cartridge can easily enter the threaded meshing area, causing thread wear and affecting the sealing and reliability of the connection. With prolonged use, the threaded fit will gradually loosen, and the clarified liquid may be contaminated. Second, the installation and replacement of the filter cartridge are inconvenient. Because the filter cartridge side connector has an external thread structure, it is prone to interference with other components during disassembly and assembly, and it is difficult to ensure accurate thread alignment. Third, when the filter element side connector adopts an external thread structure, it limits the diameter of the filter element side connector, resulting in insufficient strength of the filter element side connector. During the operation of the filter concentrator, the vibration generated by the stirring device will cause the filter element side connector with external thread structure to move slightly, which will accelerate the wear and loosening of the threaded connection and affect the stable operation of the equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a filter element installation structure for a filtration concentrator and a filtration concentrator, while solving the technical problems mentioned in the background art.

[0005] In a first aspect, a filter element mounting structure for a filtration concentrator is provided, comprising a filter element mounting tube extending circumferentially along the inner wall of the filtration concentrator cylinder. The filter element mounting tube is provided with a clear liquid output structure and a plurality of filter element mounting tube side connectors spaced apart along the length of the filter element mounting tube. The plurality of filter element mounting tube side connectors are respectively used to mount filter elements and guide the clear liquid output from the corresponding filter element into the filter element mounting tube for discharge through the clear liquid output section. The end of each filter element is provided with a filter element side connector, which is adapted to and connected to the corresponding filter element mounting tube side connector. The filter element side connector has an axial through hole capable of accommodating the corresponding filter element mounting tube side connector, and the inner end of the axial through hole... The axial through hole is connected to the inner cavity of the corresponding filter element, and its outer end extends to the end face of the filter element side connector. An internal thread hole is formed near its inner end and a countersunk hole is formed near its outer end in the channel of the axial through hole. The filter element mounting tube side connector has a nozzle that can be accommodated in the corresponding axial through hole. The outlet position of the nozzle forms an external thread rod that matches the corresponding internal thread hole, and the root position forms a sealing ring mounting flange that matches the corresponding countersunk hole. A sealing ring is fitted on the sealing ring mounting flange. When the sealing ring is working, it is located between the corresponding countersunk hole and the corresponding sealing ring mounting flange, thereby isolating the external raw liquid of the filter element from the mutually matching internal thread hole and external thread rod.

[0006] Secondly, a filtration concentrator is provided, comprising: a cylindrical body; a stirring device including a drive assembly, a rotating shaft assembly, and a paddle assembly, wherein the drive assembly is mounted on the upper end face of the cylindrical body, the upper end of the rotating shaft assembly is connected to the drive assembly and the lower end extends into the cylindrical body, and the paddle assembly is mounted on the rotating shaft assembly; a filtration device including at least one set of filter elements, wherein the at least one set of filter elements is installed inside the cylindrical body and located beside the rotating shaft assembly and / or the paddle assembly, the at least one set of filter elements is connected to a clear liquid output pipeline, and the clear liquid output pipeline extends to the outside of the cylindrical body; the filtration device employs a filter element mounting structure, wherein the filter element mounting structure includes a filter element mounting tube extending circumferentially along the inner wall of the cylindrical body, the filter element mounting tube is provided with a clear liquid output structure and a plurality of filter element mounting tube side connectors spaced apart along the length direction of the filter element mounting tube, the plurality of filter element mounting tube side connectors being respectively used to install filter elements and output clear liquid from the corresponding filter elements. The liquid is introduced into the filter element installation tube and discharged through the clear liquid output section. The end of the filter element is provided with a filter element side connector, which is adapted to and connected to the corresponding filter element installation tube side connector. The filter element side connector has an axial through hole that can accommodate the corresponding filter element installation tube side connector. The inner end of the axial through hole is connected to the inner cavity of the corresponding filter element, and the outer end of the axial through hole extends to the end face of the filter element side connector. An internal thread hole is formed near the inner end of the axial through hole, and a countersunk hole is formed near the outer end. The filter element installation tube side connector has a nozzle that can be accommodated in the corresponding axial through hole. The outlet position of the nozzle forms an external thread rod that matches the corresponding internal thread hole, and the root position forms a sealing ring mounting flange that matches the corresponding countersunk hole. A sealing ring is fitted on the sealing ring mounting flange. When the sealing ring is working, it is located between the corresponding countersunk hole and the corresponding sealing ring mounting flange, thereby isolating the original liquid outside the filter element from the mutually adapted internal thread hole and external thread rod.

[0007] By providing an axial through hole on the filter element side connector to accommodate the filter element mounting tube side connector, and forming an internal threaded hole and a countersunk hole within this through hole, while correspondingly providing an external threaded rod and a sealing ring mounting flange on the nozzle of the filter element mounting tube side connector, the threaded mating area is completely isolated from the external raw liquid by the sealing ring. This not only solves the problem of corrosion of the threads by the raw liquid and impurities, but also provides a reliable sealing effect through the cooperation of the sealing ring and the countersunk hole. In addition, the large-diameter sleeve structure of the filter element side connector significantly improves its structural strength, effectively resisting the vibration generated by the stirring device and preventing fretting and loosening. At the same time, this internal threaded mating structure also facilitates the installation and replacement of the filter element, avoids interference with other components, and improves the operational reliability and maintenance convenience of the filtration concentrator.

[0008] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice. Attached Figure Description

[0009] The accompanying drawings, which form part of this specification, are used to aid in understanding the present invention. The contents provided in the drawings and their related descriptions in this specification can be used to explain the present invention, but do not constitute an undue limitation on the present invention.

[0010] Figure 1 This is a schematic diagram of the filter element installation structure of the filter concentrator according to Embodiment 1 of this utility model.

[0011] Figure 2 for Figure 1 Axial view of the side connector of the middle filter element.

[0012] Figure 3 This is a schematic diagram of the filter element installation structure of the filter concentrator in Embodiment 2 of this utility model.

[0013] Figure 4 This is a schematic diagram of the filter element installation structure of the filter concentrator in Embodiment 3 of this utility model.

[0014] Figure 5 for Figure 4 Axial view of the side connector of the middle filter element.

[0015] The markings in the diagram are as follows: 1-Filter element mounting tube, 2-Filter element mounting tube side connector, 21-External threaded rod, 22-Sealing ring mounting flange, 23-Sealing ring axial positioning flange, 24-Filter element side connector axial positioning flange, 3-Filter element, 4-Filter element side connector, 41-Axial through hole, 411-Internal threaded hole, 412-Counterhead hole, 5-Sealing ring, 6-Heat dissipation groove. Detailed Implementation

[0016] The present invention will now be clearly and completely described in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that:

[0017] The technical solutions and features provided in the various sections, including the following description, can be combined with each other without conflict. Furthermore, where possible, these technical solutions, features, and related combinations can be given specific technical subject matter and protected by relevant patents.

[0018] The embodiments of the present invention described below are generally only some embodiments and not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of patent protection.

[0019] Regarding the terminology and units in this specification: The terms "comprising," "including," "having," and any variations thereof in this specification, the corresponding claims, and related sections are intended to cover non-exclusive inclusion. Furthermore, other related terms and units can be reasonably interpreted based on the relevant content provided in this specification.

[0020] Figure 1 This is a schematic diagram of the filter element 3 installation structure of the filter concentrator in Embodiment 1 of this utility model. Figure 2 for Figure 1 Axial view of the three side connectors of the middle filter element. (See image.) Figures 1-2 As shown, the filter element 3 mounting structure of the filtration concentrator includes a filter element 3 mounting tube extending circumferentially along the inner wall of the filtration concentrator cylinder. The filter element 3 mounting tube has a clear liquid output structure and multiple filter element 3 mounting tube side connectors spaced apart along the length of the tube. These multiple filter element 3 mounting tube side connectors are used to install the filter element 3 and guide the clear liquid output from the corresponding filter element 3 into the filter element 3 mounting tube for discharge through the clear liquid output section. The end of the filter element 3 has a filter element 3 side connector, which is adapted to and connected to the corresponding filter element 3 mounting tube side connector. The filter element 3 side connector has an axial through hole 41 that can accommodate the corresponding filter element 3 mounting tube side connector. The inner end of the axial through hole 41 communicates with the inner cavity of the corresponding filter element 3, and the outer end of the axial through hole 41 extends to... On the end face of the side connector of the filter element 3, an internal threaded hole 411 is formed near its inner end of the channel of the axial through hole 41, and a countersunk hole 412 is formed near its outer end; the filter element 3 mounting tube side connector has a nozzle that can be accommodated in the corresponding axial through hole 41. The outlet position of the nozzle forms an external threaded rod filter element 3 mounting tube side connector 21 that matches the corresponding internal threaded hole 411, and the root position forms a sealing ring 5 mounting flange 22 that matches the corresponding countersunk hole 412. A sealing ring 5 is fitted on the sealing ring 5 mounting flange 22. When the sealing ring 5 is working, it is located between the corresponding countersunk hole 412 and the corresponding sealing ring 5 mounting flange 22, thereby isolating the external raw liquid of the filter element 3 from the mutually matching internal threaded hole 411 and external threaded rod filter element 3 mounting tube side connector 21.

[0021] By providing an axial through hole 41 on the side connector of filter element 3 to accommodate the side connector of filter element 3 mounting tube, and forming an internal threaded hole 411 and a countersunk hole 412 in the through hole, and correspondingly providing an external threaded rod filter element 3 mounting tube side connector 21 and a sealing ring 5 mounting flange 22 on the nozzle of the side connector of filter element 3 mounting tube, the threaded mating part is completely isolated from the external raw liquid of filter element 3 by the sealing ring 5. This not only solves the problem of corrosion of the threads by raw liquid and impurities, but also provides a reliable sealing effect through the cooperation of sealing ring 5 and countersunk hole 412. In addition, since the side connector of filter element 3 adopts a sleeve structure with a large outer diameter, its structural strength is significantly improved, which can effectively resist the vibration generated by the stirring device and prevent micro-movement and loosening. At the same time, this internal threaded mating structure also facilitates the installation and replacement of filter element 3, avoids interference with other components, and improves the operational reliability and maintenance convenience of the filtration concentrator.

[0022] The countersunk hole 412 has a tapered channel at its inner end near the axial through hole 41, and a cylindrical channel at its outer end near the axial through hole 41. The cylindrical channel connects to the large end of the corresponding tapered channel. The nozzle has an axial positioning flange 23 for the sealing ring 5 at the bottom of the mounting flange 22. When the sealing ring 5 is working, it is axially pressed into the space formed by the corresponding tapered channel, the corresponding cylindrical channel, the mounting flange 22, and the axial positioning flange 23.

[0023] By designing the countersunk hole 412 as a combination of an inner tapered channel and an outer cylindrical channel, and setting an axial positioning flange 23 for the sealing ring 5 on the nozzle, the sealing ring 5 can be precisely pressed within the space defined by these four structural components when the sealing ring 5 mounting flange 22 is tightened. The tapered channel can guide the sealing ring 5 to undergo radial deformation, while the cylindrical channel provides stable radial support. Combined with the axial pressing action of the sealing ring 5 mounting flange 22 and the sealing ring 5 axial positioning flange 23, a reliable three-dimensional sealing effect is formed.

[0024] Furthermore, in this embodiment, the outer peripheral wall of the filter element 3 side connector has a rotation-carrying structure. Specifically, the rotation-carrying structure is an external hexagonal head. Providing an external hexagonal head as a rotation-carrying structure on the outer peripheral wall of the filter element 3 side connector facilitates the installation and removal of the filter element 3 by operators using a standard wrench. Simultaneously, the external hexagonal structure provides a larger torque transmission area, preventing damage to the filter element 3 side connector during tightening and ensuring reliable connection.

[0025] Furthermore, in this embodiment, a heat dissipation groove 6 is provided on the outer peripheral wall of the filter element 3 side connector. Providing the heat dissipation groove 6 on the outer peripheral wall of the filter element 3 side connector increases the heat dissipation area and accelerates heat dissipation around the filter element 3 side connector. This is of great significance for the stable operation of the filtration concentrator under high-temperature conditions, and also prevents localized overheating from adversely affecting the sealing ring 5.

[0026] Furthermore, in this embodiment, the diameter of the outer peripheral wall of the side connector of the filter element 3 is equal to the outer diameter of the filter cartridge portion of the filter element 3. Designing the outer peripheral wall diameter of the side connector of the filter element 3 to be equal to the outer diameter of the filter cartridge portion of the filter element 3 ensures sufficient strength and rigidity, avoids local protrusions affecting installation, and also facilitates the manufacturing and processing of the filter element 3, improving product consistency and interchangeability.

[0027] Figure 3 This is a schematic diagram of the filter element 3 installation structure of the filtration concentrator in Embodiment 2 of this utility model. Figure 3 As shown, the filter element 3 mounting structure of the filtration concentrator includes a filter element 3 mounting tube extending circumferentially along the inner wall of the filtration concentrator cylinder. The filter element 3 mounting tube has a clear liquid output structure and multiple filter element 3 mounting tube side connectors spaced apart along the length of the tube. These multiple filter element 3 mounting tube side connectors are used to install the filter element 3 and guide the clear liquid output from the corresponding filter element 3 into the filter element 3 mounting tube for discharge through the clear liquid output section. The end of the filter element 3 has a filter element 3 side connector, which is adapted to and connected to the corresponding filter element 3 mounting tube side connector. The filter element 3 side connector has an axial through hole 41 that can accommodate the corresponding filter element 3 mounting tube side connector. The inner end of the axial through hole 41 communicates with the inner cavity of the corresponding filter element 3, and the outer end of the axial through hole 41 extends to... On the end face of the side connector of the filter element 3, an internal threaded hole 411 is formed near its inner end of the channel of the axial through hole 41, and a countersunk hole 412 is formed near its outer end; the filter element 3 mounting tube side connector has a nozzle that can be accommodated in the corresponding axial through hole 41. The outlet position of the nozzle forms an external threaded rod filter element 3 mounting tube side connector 21 that matches the corresponding internal threaded hole 411, and the root position forms a sealing ring 5 mounting flange 22 that matches the corresponding countersunk hole 412. A sealing ring 5 is fitted on the sealing ring 5 mounting flange 22. When the sealing ring 5 is working, it is located between the corresponding countersunk hole 412 and the corresponding sealing ring 5 mounting flange 22, thereby isolating the external raw liquid of the filter element 3 from the mutually matching internal threaded hole 411 and external threaded rod filter element 3 mounting tube side connector 21.

[0028] Specifically, in this embodiment, the nozzle has an axial positioning flange 24 for the filter element 3 side connector located at the bottom of the mounting flange 22 of the sealing ring 5. This axial positioning flange 24 for the filter element 3 side connector is used for contact and positioning with the corresponding end face. In addition, two sealing rings 5 ​​are axially spaced on the mounting flange 22 of the sealing ring 5.

[0029] By setting an axial positioning flange 24 on the filter element 3 side connector on the nozzle, accurate axial positioning can be formed with the end face of the filter element 3 side connector during installation, avoiding the filter element 3 side connector being installed too tight or too loose. At the same time, two sealing rings 5 ​​are axially spaced on the sealing ring 5 mounting flange 22, forming a double sealing protection. Even if one sealing ring 5 ages or is damaged, the other sealing ring 5 can still maintain the sealing effect, further improving the sealing reliability of the filter element 3 installation structure during the long-term operation of the filter concentrator.

[0030] Furthermore, in this embodiment, the outer peripheral wall of the filter element 3 side connector has a rotating structure. Specifically, the rotating structure is an external hexagonal head. A heat dissipation groove 6 is also formed on the outer peripheral wall of the filter element 3 side connector. In addition, the diameter of the outer peripheral wall of the filter element 3 side connector is equal to the outer diameter of the filter cartridge portion of the filter element 3.

[0031] Figure 4 This is a schematic diagram of the filter element 3 installation structure of the filter concentrator in Embodiment 3 of this utility model. Figure 5 for Figure 4 Axial view of the three side connectors of the middle filter element. (See image.) Figures 4-5As shown, the filter element 3 mounting structure of the filtration concentrator includes a filter element 3 mounting tube extending circumferentially along the inner wall of the filtration concentrator cylinder. The filter element 3 mounting tube has a clear liquid output structure and multiple filter element 3 mounting tube side connectors spaced apart along the length of the tube. These multiple filter element 3 mounting tube side connectors are used to install the filter element 3 and guide the clear liquid output from the corresponding filter element 3 into the filter element 3 mounting tube for discharge through the clear liquid output section. The end of the filter element 3 has a filter element 3 side connector, which is adapted to and connected to the corresponding filter element 3 mounting tube side connector. The filter element 3 side connector has an axial through hole 41 that can accommodate the corresponding filter element 3 mounting tube side connector. The inner end of the axial through hole 41 communicates with the inner cavity of the corresponding filter element 3, and the outer end of the axial through hole 41 extends to... On the end face of the side connector of the filter element 3, an internal threaded hole 411 is formed near its inner end of the channel of the axial through hole 41, and a countersunk hole 412 is formed near its outer end; the filter element 3 mounting tube side connector has a nozzle that can be accommodated in the corresponding axial through hole 41. The outlet position of the nozzle forms an external threaded rod filter element 3 mounting tube side connector 21 that matches the corresponding internal threaded hole 411, and the root position forms a sealing ring 5 mounting flange 22 that matches the corresponding countersunk hole 412. A sealing ring 5 is fitted on the sealing ring 5 mounting flange 22. When the sealing ring 5 is working, it is located between the corresponding countersunk hole 412 and the corresponding sealing ring 5 mounting flange 22, thereby isolating the external raw liquid of the filter element 3 from the mutually matching internal threaded hole 411 and external threaded rod filter element 3 mounting tube side connector 21.

[0032] The nozzle has an axial positioning flange 23 at the bottom of the mounting flange 22 of the sealing ring 5. During operation, the sealing ring 5 is axially pressed within the space defined by the corresponding countersunk hole 412, the mounting flange 22, and the axial positioning flange 23. This space is cylindrical; the sealing ring 5 is also cylindrical.

[0033] By setting an axial positioning flange 23 at the bottom of the sealing ring 5 mounting flange 22 at the nozzle, and confining the sealing ring 5 within the cylindrical space formed by the countersunk hole 412, the sealing ring 5 mounting flange 22, and the sealing ring 5 axial positioning flange 23, and using a cylindrical sealing ring 5 that matches this space, the sealing ring 5 can maintain stable radial deformation while being axially compressed during the tightening process, avoiding twisting or local deformation of the sealing ring 5. This ensures a uniform and reliable sealing effect between the sealing ring 5 and each contact surface, and more effectively prevents the external raw liquid of the filter element 3 from seeping into the threaded mating parts.

[0034] Furthermore, in this embodiment, the outer peripheral wall of the filter element 3 side connector has a rotating structure. Specifically, the rotating structure is an external hexagonal head. A heat dissipation groove 6 is also formed on the outer peripheral wall of the filter element 3 side connector. Additionally, the outer peripheral wall of the filter element 3 side connector is slightly smaller than or equal to the outer diameter of the filter cartridge portion of the filter element 3.

[0035] This utility model also provides a filtration concentrator, comprising: a cylindrical body; a stirring device including a drive assembly, a rotating shaft assembly, and a paddle assembly, wherein the drive assembly is mounted on the upper end face of the cylindrical body, the upper end of the rotating shaft assembly is connected to the drive assembly and the lower end extends into the cylindrical body, and the paddle assembly is mounted on the rotating shaft assembly; a filtration device including at least one set of filter elements 3, wherein the at least one set of filter elements 3 is mounted inside the cylindrical body and located beside the rotating shaft assembly and / or the paddle assembly, and the at least one set of filter elements 3 is connected to a clear liquid output pipeline, the clear liquid output pipeline extending to the outside of the cylindrical body; the filtration device adopts the above-mentioned filter element 3 mounting structure.

[0036] The foregoing has described the relevant content of this utility model. Those skilled in the art will be able to implement this utility model based on these descriptions. All other embodiments obtained by those skilled in the art based on the foregoing content of this specification without inventive effort should fall within the scope of patent protection.

Claims

1. A filtration and concentrator, including: cylindrical body; A stirring device includes a drive assembly, a shaft assembly, and a blade assembly. The drive assembly is mounted on the upper end face of the cylinder. The upper end of the shaft assembly is connected to the drive assembly, and the lower end extends into the cylinder. The blade assembly is mounted on the shaft assembly. A filtration device comprising at least one set of filter elements, the at least one set of filter elements being installed inside the cylinder and located beside the rotating shaft assembly and / or the blade assembly, the at least one set of filter elements being connected to a clear liquid output pipeline, the clear liquid output pipeline extending to the outside of the cylinder; The filtration device employs a filter element mounting structure, which includes a filter element mounting tube extending circumferentially along the inner wall of the cylinder. The filter element mounting tube is provided with a clear liquid output structure and a plurality of filter element mounting tube side connectors arranged at intervals along the length of the filter element mounting tube. The plurality of filter element mounting tube side connectors are respectively used to install filter elements and guide the clear liquid output from the corresponding filter element into the filter element mounting tube and discharge it through the clear liquid output section. The end of the filter element is provided with a filter element side connector, and the filter element side connector is adapted to and connected to the corresponding filter element mounting tube side connector. Its features are: The filter element side connector has an axial through hole that can accommodate the corresponding filter element mounting tube side connector. The inner end of the axial through hole is connected to the inner cavity of the corresponding filter element, and the outer end of the axial through hole extends to the end face of the filter element side connector. An internal thread hole is formed near its inner end in the channel of the axial through hole, and a countersunk hole is formed near its outer end. The filter element mounting tube side connector has a nozzle that can be accommodated in the corresponding axial through hole. The outlet position of the nozzle forms an external thread rod that matches the corresponding internal thread hole, and the root position forms a sealing ring mounting flange that matches the corresponding countersunk hole. A sealing ring is fitted on the sealing ring mounting flange. When the sealing ring is working, it is located between the corresponding countersunk hole and the corresponding sealing ring mounting flange, thereby isolating the external raw liquid of the filter element from the mutually matching internal thread hole and external thread rod.

2. The filtration and concentrator as described in claim 1, characterized in that: The inner end of the countersunk hole near the axial through hole is a tapered channel, and the outer end of the countersunk hole near the axial through hole is a cylindrical channel. The cylindrical channel connects to the large end of the corresponding tapered channel. The nozzle has an axial positioning flange for the sealing ring at the bottom of the sealing ring mounting flange. When the sealing ring is working, it is axially pressed into the space defined by the corresponding tapered channel, the corresponding cylindrical channel, the corresponding sealing ring mounting flange, and the corresponding sealing ring axial positioning flange.

3. The filtration and concentrator as described in claim 1, characterized in that: The nozzle has an axial positioning flange for the filter element side connector located at the bottom of the sealing ring mounting flange. This axial positioning flange for the filter element side connector is used to contact and position itself with the corresponding end face.

4. The filtration and concentrator as described in claim 3, characterized in that: The sealing ring mounting flange has two sealing rings spaced axially at intervals.

5. The filtration and concentrator as described in claim 1, characterized in that: The nozzle has an axial positioning flange for the sealing ring located at the bottom of the sealing ring mounting flange. When the sealing ring is in operation, it is axially pressed into the space defined by the corresponding countersunk hole, the corresponding sealing ring mounting flange, and the corresponding sealing ring axial positioning flange.

6. The filtration and concentrator as described in claim 5, characterized in that: The space is a cylindrical space; the sealing ring is a cylindrical sealing ring.

7. The filtration and concentrator as described in claim 1, characterized in that: The outer peripheral wall of the filter element side connector has a rotating structure.

8. The filtration and concentrator as described in claim 7, characterized in that: The carrying structure is an external hexagonal head.

9. The filtration and concentrator as described in claim 1, characterized in that: The filter element side connector has heat dissipation grooves on its outer peripheral wall.

10. The filtration and concentrator as described in claim 1, characterized in that: The diameter of the outer peripheral wall of the filter element side connector is less than or equal to the outer diameter of the filter element cartridge portion.

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