A spliced ​​filter element, a spliced ​​filter element unit and a filter

Abstract

A spliced ​​filter element, a spliced ​​filter element unit and a filter, wherein the upper end cover and the lower end cover of the spliced ​​filter element unit are respectively formed with a first connection structure and a second connection structure, and the two ends of the sealing cover are also respectively formed with a first connection structure and a second connection structure, and the spliced ​​filter element is composed of a plurality of spliced ​​filter element units and a sealing cover spliced ​​together through the first connection structure and the second connection structure, and the center positioning and sealing are maintained by the first connection ring and the second connection ring during splicing, and the locking is achieved by the U-shaped handle and the annular pull ring. Its advantages are: 1. It can be spliced ​​into different filter elements to adapt to different filters, with better versatility and low production cost; 2. The splicing structure is simple, easy to operate, and can be independently packaged and transported. When replacing the filter element, only some of the spliced ​​filter element units with serious wear and tear can be replaced without replacing all of them, and the use cost is low; 3. The design is unique, and the U-shaped handle is cleverly used, which can be used for locking and fixing during splicing, and can also be used for extraction operations.

Description

Technical Field

[0001] The present invention relates to the field of filtering technology, and in particular to a spliced ​​filter element, a spliced ​​filter element unit and a filter. Background Art

[0002] The function of the filter is to remove suspended matter and particulate matter from the water, thereby reducing turbidity and purifying water quality, thereby reducing the generation of system dirt, algae and rust, so as to ensure the water purification effect and protect the normal operation of other equipment in the system.

[0003] For example, the Chinese utility model patent CN211445159U discloses a high-precision, high-flow microporous structure in a filter, and the Chinese utility model patent CN211462286 U discloses a multi-core external pressure, high-flow filter. Both of the above utility model patents disclose a vertical structure, a high-flow multi-core filter. First, it adopts a vertical structure with a small footprint, and secondly, it contains multiple filter elements to achieve high-flow filtration and circulation. Conventional vertical high-flow multi-core filters usually include a cylinder, an upper cover, a faceplate, and a number of filter elements. The faceplate is formed with a number of positioning holes, and a number of filter elements are positioned and installed in the cylinder through the faceplate. After the filter has been working for a certain period of time, a large amount of dirt will adhere to the surface of the filter element, resulting in a decrease in filtering performance. At this time, the filter element needs to be removed for cleaning, maintenance or replacement. When the filter element needs to be removed, just open the upper cover to easily remove the filter element, and it is also very convenient to disassemble and replace.

[0004] The filter element generally comprises a filter portion and an upper end cap and a lower end cap disposed at both ends of the filter portion.

[0005] Different filter lengths require different filter element lengths, such as 10 inches, 20 inches, 30 inches, etc. At this time, it is often necessary to produce filter elements of different lengths to adapt to different filters. In addition, some longer filter elements cannot be directly processed due to the limitation of the filter membrane width or the specification of the production equipment. They often need to be connected into one by welding through multiple filter sections, which makes processing more difficult, production costs higher, and packaging and transportation more inconvenient.

[0006] In addition, in some working conditions, a filter with a bottom-in and bottom-out fluid flow direction may be used, the upper end cover of the filter element is closed, and the lower end cover needs to be open, and the filter medium flows and filters from the outside to the inside of the filter part; in other working conditions, a filter with a top-in and bottom-out fluid flow direction may be used, the upper end cover of the filter element is open, and the lower end cover needs to be closed, and the filter medium flows and filters from the inside to the outside of the filter part. Different types of filters need to have filter elements with different structures, and they cannot be used universally.

[0007] In addition, in the above-mentioned vertical filter, the service life of the lower half of the filter element is usually lower than that of the upper half. When the discharge port is located at the bottom, the lower half of the filter element carries more filtering tasks than the upper half of the filter element. The lower half of the filter element often filters most of the water, while the upper half of the filter element only filters a small part of the water. Moreover, the pollutants intercepted by the filter element will naturally sink, and the pollutants will adhere to the surface of the filter element, which will not only seriously affect the filtering flow of the filter element, but also shorten the normal service life of the filter element, causing the filtering performance of the lower half of the filter element to fail faster. However, once the service life of the lower half of the filter element reaches the end and the filtering performance cannot meet the standard, the entire filter element needs to be replaced. At this time, the upper half of the filter element often still has normal filtering capacity, which causes waste and increases costs. Summary of the invention

[0008] In order to overcome the shortcomings of the background technology, the present invention provides a spliced ​​filter element, a spliced ​​filter element unit and a filter.

[0009] The technical solution adopted by the present invention is: a spliced ​​filter element, including a filter element assembly and a sealing cover, the filter element assembly is assembled by splicing a plurality of splicable filter element units, and the sealing cover is also installed at the upper end or the lower end of the filter element assembly by splicing.

[0010] The splicable filter element unit includes a filter part, an upper end cover, and a lower end cover. The upper end cover is arranged at the upper end of the filter part, and a first through hole connected to the hollow of the filter part is formed in the center of the upper end cover, and a first connecting structure is formed at the end of the upper end cover; the lower end cover is arranged at the lower end of the filter part, and a second through hole connected to the hollow of the filter part is formed in the center of the lower end cover, and a second connecting structure is formed at the end of the lower end cover; the filter element assembly is formed by splicing a plurality of splicable filter element units in sequence through the first connecting structure and the second connecting structure.

[0011] The sealing cover comprises a cover body, and the two end surfaces of the cover body are respectively formed with a first connection structure and a second connection structure which are the same as the splicable filter element unit. The sealing cover and the filter element assembly are also spliced ​​and connected to each other through the first connection structure and the second connection structure.

[0012] The first connection structure includes a first connection ring and a U-shaped handle located inside the first connection ring; the second connection structure includes a second connection ring and an annular pull ring located inside the second connection ring. The second connection ring is adapted to the first connection ring, and the adaptation here means that the outer diameter of the second connection ring is adapted to the inner diameter of the first connection ring, and the second connection ring and the first connection ring can form a plug-in fit. Two slots corresponding to the U-shaped handle are symmetrically formed on the annular pull ring, and the lower end of the slot is open, and the slot includes a transverse section and a longitudinal section, and the overall shape is "7".

[0013] When the first connecting structure and the second connecting structure are spliced ​​with each other, first align the U-shaped handle of the first connecting structure with the slot opening of the annular pull ring of the second connecting structure, then plug the first connecting ring and the second connecting ring into each other, and at the same time, the U-shaped handle will enter the longitudinal section of the slot through the opening. Finally, when the U-shaped handle moves to the end of the longitudinal section, the U-shaped handle is rotated to enter the transverse section of the slot, thereby realizing the limited snap connection between the U-shaped handle and the slot, completing the mutual locking and fixation of the first connecting structure and the second connecting structure, and realizing splicing. The splicing operation is very simple.

[0014] When the first connecting structure and the second connecting structure are spliced ​​with each other, a reliable seal needs to be ensured between the first connecting ring and the second connecting ring to prevent the filter medium from leaking from the splicing. There are many ways to seal, and sealing can be achieved by a sealing ring, such as arranging a first sealing ring on the outer sleeve of the second connecting ring, and the first sealing ring can be provided with multiple layers to achieve multi-layer sealing and ensure sealing performance. Sealing can also be achieved by a sealing gasket, which can be arranged between the end of the first connecting ring and the lower end cover or the cover body, and the sealing gasket can also be arranged between the end of the second connecting ring and the upper end cover or the cover body. When the first connecting structure and the second connecting structure are spliced, an axial force can be applied. When the U-shaped handle and the annular pull ring are locked with each other, the axial force can be maintained, and the first connecting ring and / or the second connecting ring can be driven to press the sealing gasket and maintain a reliable seal.

[0015] In addition, a limiting convex point is formed on the transverse section of the slot, and the limiting convex point can be used to form a limiting match with the U-shaped handle. The limiting convex point is used for limiting, which can prevent the first connection structure and the second connection structure from rotating relative to each other, and can ensure that the first connection structure and the second connection structure will not be easily separated automatically, thereby ensuring the stability of the structure. At the same time, the convex point is used, and during the disassembly and assembly process, the limiting convex point can be easily crossed, which will not excessively increase the difficulty of disassembly and assembly.

[0016] A filter comprises a cylinder, an upper cover, a filter element positioning assembly and a plurality of the above-mentioned spliced ​​filter elements, wherein the cylinder has a cavity with an upper opening, and a feed port and a discharge port, the upper cover is openably and closably arranged at the upper end of the cylinder and can be used to close the upper end opening of the cylinder, the filter element positioning assembly is arranged inside the cylinder and is used for positioning and installing the filter element, and the spliced ​​filter element can be loaded into the cylinder through the upper end opening of the cylinder and positioned and matched with the filter element positioning assembly.

[0017] When the sealing cover of the spliced ​​filter element is spliced ​​onto the upper end of the filter element assembly, the upper end of the spliced ​​filter element remains closed.

[0018] Correspondingly, the filter element positioning assembly of the filter may include a faceplate, a pressure plate, a plurality of fastening rods, a locking nut, etc. The faceplate is arranged near the bottom of the cylinder, and the faceplate divides the internal cavity of the cylinder into a liquid inlet cavity and a liquid outlet cavity. The faceplate is also provided with a plurality of sockets that can be adapted to the second connecting ring, and the sockets are connected up and down; the fastening rods are evenly distributed on the faceplate, and the upper end of the fastening rods can pass through the pressure plate and form an external thread, and the locking nut cooperates with the fastening rod thread.

[0019] Based on the above structure, when it is necessary to install a spliced ​​filter element in the above filter, firstly, insert multiple spliced ​​filter elements into each socket through the second connecting ring at the lower end, and a second sealing ring can be sleeved outside the second connecting ring to ensure a reliable seal between the second connecting ring and the socket; then put in a pressing plate, align the hole on the pressing plate with the fastening rod, so that the pressing plate is sleeved on the fastening rod and placed above the spliced ​​filter element, and then install the locking nut to the upper end of the fastening rod and lock it. After the locking nut is locked, it can force the pressing plate to press the spliced ​​filter element downward; finally, cover the upper cover to close the upper end opening of the cylinder. When it is necessary to disassemble the spliced ​​filter element in the above filter, after opening the upper cover, loosening the locking nut, and removing the pressing plate, the spliced ​​filter element can be easily grasped and lifted out through the U-shaped handle.

[0020] In addition, the feed port of the cylinder can be connected to the liquid inlet cavity, and the discharge port can be connected to the liquid outlet cavity. During filtering, the filter medium can flow from the outside to the inside of the filter part to achieve filtration. The filter medium passes through the feed port, liquid inlet cavity, spliced ​​filter element, liquid outlet cavity, and discharge port in turn to achieve filtration.

[0021] When the sealing cover of the spliced ​​filter element is spliced ​​to the lower end of the filter element assembly, the lower end of the spliced ​​filter element remains closed.

[0022] Correspondingly, the filter element positioning assembly of the filter may include a faceplate, a filter element retainer, etc. The faceplate is arranged near the top of the cylinder, and the faceplate divides the cylinder into a liquid inlet chamber and a liquid outlet chamber. The faceplate is also provided with a plurality of sockets that can be adapted to the first connecting ring, and the sockets are connected up and down.

[0023] Based on the above structure, when it is necessary to install a spliced ​​filter element in the above filter, firstly, multiple spliced ​​filter elements are passed through the socket from top to bottom, and the first connecting ring at the top of the spliced ​​filter element is retained in the socket, and a third sealing ring can be sleeved outside the first connecting ring to ensure a reliable seal between the first connecting ring and the socket; then the position of the spliced ​​filter element is maintained by the filter element retainer to prevent it from falling out of the socket, and finally the upper cover is covered to close the upper end opening of the cylinder. When it is necessary to disassemble the spliced ​​filter element in the above filter, after opening the upper cover and unfastening the filter element retainer, the spliced ​​filter element can be easily grasped and lifted out by the U-shaped handle.

[0024] Among them, the filter element holder includes a U-shaped holder and a limiting cross bar. The U-shaped holder can cooperate with the U-shaped handle to limit the position. The limiting cross bar is connected to the U-shaped holder and can be mounted on the face plate and detachably connected to the face plate, thereby realizing the axial position limitation of the spliced ​​filter element and preventing it from accidentally falling out of the socket.

[0025] In addition, the feed port of the cylinder can be connected to the liquid inlet cavity, and the discharge port can be connected to the liquid outlet cavity. During filtering, the filter medium can flow from the inside to the outside of the filter part to achieve filtration. The filter medium passes through the feed port, liquid inlet cavity, spliced ​​filter element, liquid outlet cavity, and discharge port in sequence to achieve filtration.

[0026] The beneficial effects of the present invention are:

[0027] 1. The filter element assembly is assembled by splicing a number of splicable filter element units and a sealing cover. You can choose to splice different numbers of splicable filter element units to change the length of the filter element assembly, and you can also adapt to different filters by changing the installation position of the sealing cover. It has better versatility. You only need to produce one splicable filter element unit to make a variety of filter element assemblies of different specifications and types by splicing, which is more conducive to batch production and processing, and reduces production costs;

[0028] 2. The splicing structure is simple, and the assembly and disassembly operations are convenient. It can be assembled by the customer by themselves, which is not only more convenient for packaging and transportation, but also when replacing and maintaining the filter element, only the splicing filter element unit at the lower end and with more serious wear can be replaced, and the use time of the splicing filter element unit at the upper end can be extended, thereby reducing the customer's filtration cost;

[0029] 3. The U-shaped handle can not only be used as a connecting structure to cooperate with the annular pull ring to achieve splicing and locking, but can also be used as a handle. When installing and removing the spliced ​​filter element in the filter, the operator can hold the U-shaped handle to operate, which is more convenient to put in or take out the spliced ​​filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a splicable filter element unit according to an embodiment of the present invention.

[0031] Figure 2 It is a schematic structural diagram of an upper end cover of a splicable filter element unit according to an embodiment of the present invention.

[0032] Figure 3 It is a schematic structural diagram of the lower end cover of the splicable filter element unit according to the first embodiment of the present invention.

[0033] Figure 4 This is a schematic structural diagram of two connectable filter element units connected to each other in accordance with the first embodiment of the present invention.

[0034] Figure 5 The figure is a schematic diagram of the cross-sectional structure of two splicable filter element units spliced ​​together according to an embodiment of the present invention.

[0035] Figure 6 It is a structural schematic diagram of the first connecting structure and the second connecting structure in accordance with the first embodiment of the present invention.

[0036] Figure 7 It is a schematic structural diagram of a sealing cover according to a second embodiment of the present invention.

[0037] Figure 8 It is a schematic structural diagram of the sealing cover from another perspective of the second embodiment of the present invention.

[0038] Fig. 9 Schematic diagram of the structure of the spliced ​​filter element according to the third embodiment of the present invention.

[0039] Fig.10 Schematic diagram of the structure of the spliced ​​filter element according to the fourth embodiment of the present invention.

[0040] Fig.11 This is a schematic diagram of the structure of the filter according to the fifth embodiment of the present invention.

[0041] Fig.12 Schematic diagram of the structure of the filter according to the sixth embodiment of the present invention.

[0042] Fig.13 This is a schematic diagram of the structure of the faceplate according to the sixth embodiment of the present invention.

[0043] Fig.14 It is a schematic cross-sectional structure diagram of the cooperation between the filter element retainer and the first connecting structure of the upper end cover according to the sixth embodiment of the present invention.

[0044] Fig.15 It is a schematic diagram of the top view of the structure of the filter element holder and the first connecting structure of the upper end cover in accordance with the sixth embodiment of the present invention. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are further described below in conjunction with the accompanying drawings. Embodiment 1

[0046] like Figure 1-Figure 3 As shown, a splicable filter element unit includes a filter portion 11, an upper end cover 12, and a lower end cover 13.

[0047] The filter part 11 is similar to the filter part of a conventional filter element, and at least includes a hollow skeleton and a microporous filter membrane coated outside the skeleton. Different configurations can be selected according to actual needs. Its structure can adopt a wound filter element structure or a folded filter element structure, which is not specifically limited here.

[0048] The upper end cover 12 and the lower end cover 13 are fixedly mounted on the upper and lower ends of the filter part 11 and sealed by hot melt welding or glue sealing and pasting. A first through hole 121 connected to the hollow of the filter part 11 is formed at the center of the upper end cover 12, and a first connection structure is formed at the end of the upper end cover 12; a second through hole 131 connected to the hollow of the filter part is formed at the center of the lower end cover 13, and a second connection structure is formed at the end of the lower end cover 13.

[0049] The first connecting structure includes a first connecting ring 31 and a U-shaped handle 32 located on the inner side of the first connecting ring 31; the second connecting structure includes a second connecting ring 41 and an annular pull ring 42 located on the inner side of the second connecting ring 41, and two slots 421 are symmetrically formed on the annular pull ring 42, and the lower end of the slot 421 is open, and the slot includes a transverse section and a longitudinal section, and the whole is in the shape of a "7".

[0050] The first connecting ring 31 is adapted to the second connecting ring 41, and the adaptation here means that the second connecting ring and the first connecting ring can cooperate with each other to form a plug-in connection. Specifically, the outer diameter of the second connecting ring 41 is consistent with the inner diameter of the first connecting ring 31, and the lengths of the first connecting ring 31 and the second connecting ring 41 are also consistent, and the second connecting ring 41 can be inserted into the first connecting ring 31 to form a tight fit.

[0051] The slot 421 of the annular pull ring 42 is adapted to the U-shaped handle 32, and the corresponding adaptation here means that the U-shaped handle 32 and the slot 421 of the annular pull ring 42 can cooperate with each other to form a limited clamping connection. Specifically, the diameter of the annular pull ring 42 is smaller than the length of the U-shaped handle 32, and the width of the slot 421 is adapted to the width of the U-shaped handle 32. When the first connecting ring 31 and the second connecting ring 41 are correspondingly plugged, the longitudinal section of the slot 421 can be aligned with the U-shaped handle 32 and the U-shaped handle 32 can be inserted into the longitudinal section of the slot 421. By relative rotation, the U-shaped handle 32 can be further inserted into the transverse section of the slot 421, thereby achieving a tight clamping fit between the two.

[0052] The two connectable filter cartridge units can be connected to each other, specifically by the first connection structure on the upper end cover of one of the connectable filter cartridge units cooperating with the second connection structure on the lower end cover of the other connectable filter cartridge unit to achieve the connection, such as Figure 4-Figure 6As shown, when splicing, first align the U-shaped handle 32 of the first connecting structure with the longitudinal section opening of the slot 421 of the annular pull ring 42 of the second connecting structure, and then plug the first connecting ring 31 and the second connecting ring 41 into each other, and at the same time, the U-shaped handle 32 will enter the longitudinal section of the slot 421 through the opening. When plugged to the bottom, the U-shaped handle 32 is rotated to enter the transverse section of the slot 421, so as to achieve the limited position connection between the U-shaped handle 32 and the slot 421, and complete the mutual locking and fixing of the first connecting structure and the second connecting structure to achieve splicing. The splicing operation is very simple. Similarly, when it is necessary to separate two spliced ​​filter element units, firstly unlock the U-shaped handle 32 and the transverse section of the slot 421 through reverse rotation, and then axial separation is sufficient, and disassembly is also very convenient.

[0053] Among them, a limiting convex point 422 is formed on the transverse section of the clamping slot 421, and the limiting convex point 422 can be used to form a limiting match with the U-shaped handle 32. The use of the limiting convex point for limiting can prevent the first connection structure and the second connection structure from automatically rotating relative to each other, and can ensure that the first connection structure and the second connection structure will not be easily separated automatically, thereby ensuring the stability of the structure. At the same time, the use of the convex point can also make it easier to cross the limiting convex point during the disassembly and assembly operation, without excessively increasing the difficulty of disassembly and assembly.

[0054] In addition, when the first connection structure and the second connection structure are spliced ​​together, reliable sealing needs to be ensured between the first connection ring and the second connection ring to prevent the filter medium from leaking from the splicing point and affecting normal filtration.

[0055] There are many ways to achieve sealing. The first way is to achieve sealing through a sealing ring, such as Figure 6 As shown, a first sealing ring 5 is provided on the outer sleeve of the second connecting ring, and the sealing performance is ensured by the first sealing ring. Of course, the first sealing ring is not limited to one layer, and multiple layers can also be provided to achieve multi-layer sealing to further ensure the sealing performance.

[0056] The second sealing method is to achieve sealing through sealing gaskets, such as Figure 6 As shown, a sealing gasket 6 is arranged on the inner ring of the first connecting ring 31 and the outer ring of the second connecting ring 41. When the first connecting structure and the second connecting structure are spliced, the first connecting ring and the second connecting ring can be driven to press the corresponding sealing gasket 6 by applying an axial force. When the U-shaped handle and the annular pull ring are locked with each other, the axial force can be always maintained to ensure that the sealing gasket 6 is pressed, thereby maintaining a reliable seal.

[0057] During specific implementation, one of the sealing methods can be selected, or both sealing methods can be set at the same time to ensure reliable sealing. Embodiment 2

[0058] like Figure 7-Figure 8 As shown, a sealing cover comprises a cover body 21, and a first connecting structure and a second connecting structure are respectively formed on both end surfaces of the cover body 21.

[0059] Among them, the first connection structure on the cover body 21 is exactly the same as the first connection structure on the upper end cover of the splicable filter element unit in Example 1, and the second connection structure on the cover body 21 is exactly the same as the second connection structure on the lower end cover of the splicable filter element unit in Example 1. Therefore, the sealing cover 2 can be spliced ​​with the splicable filter element unit in Example 1, and can be spliced ​​with the upper end cover of the splicable filter element unit, and can be spliced ​​with the lower end cover of the splicable filter element unit, thereby realizing the closure of the upper end cover or the lower end cover of the splicable filter element unit.

[0060] The splicing structure and disassembly method of the cover body and the splicable filter element unit are the same as the splicing structure and disassembly method of the two splicable filter element units in Example 1. The cover body and the splicable filter element unit are also reliably sealed by the first sealing ring and the sealing gasket, which will not be described in detail here. Embodiment 3

[0061] like Fig. 9 As shown, a spliced ​​filter element includes a filter element assembly 1 and a sealing cover 2. The filter element assembly 1 is composed of two splicable filter element units as shown in Example 1 spliced ​​together, and the sealing cover 2 is the sealing cover as shown in Example 2.

[0062] The sealing cover 2 is arranged at the upper end of the filter element assembly 1 and is sealed and spliced ​​with the upper end cover at the upper end of the filter element assembly 1, so that the upper end of the spliced ​​filter element remains closed.

[0063] That is to say, the above-mentioned spliced ​​filter element is closed at the upper end and open at the lower end. During filtering, the filter medium can flow from the outside to the inside of the spliced ​​filter element to achieve filtration, and then the filtered medium flows out from the lower end opening. It can also first flow into the lower end opening of the spliced ​​filter element, and then flow from the inside to the outside to achieve filtration.

[0064] Of course, the number of connectable filter element units included in the filter element assembly 1 is not limited to 2 as shown in the figure, and can also be 3, 4, or even only 1 connectable filter element unit can be provided. Embodiment 4

[0065] like Fig.10 As shown, a spliced ​​filter element is mainly different from the third embodiment in that the sealing cover 2 is arranged at the lower end of the filter element assembly 1 and is sealed and spliced ​​with the lower end cover of the lower end of the filter element assembly 1, so that the lower end of the spliced ​​filter element remains closed.

[0066] That is to say, the above-mentioned spliced ​​filter element is closed at the lower end and open at the upper end. During filtering, the filter medium can flow from the outside to the inside of the spliced ​​filter element to achieve filtration, and then the filtered medium flows out from the upper end opening. It can also first flow into the upper end opening of the spliced ​​filter element, and then flow from the inside to the outside to achieve filtration.

[0067] Similarly, the number of splicable filter element units included in the filter element assembly 1 of the above-mentioned spliced ​​filter element is not limited to the two shown in the figure, and can also be three, four, or even only one splicable filter element unit can be provided.

[0068] The spliced ​​filter elements of the fourth embodiment and the third embodiment can be respectively adapted to different filters to meet the installation requirements of different filters. Embodiment 5

[0069] like Fig.11 As shown, a filter comprises a cylinder 7, an upper cover 8, a filter element positioning assembly and a plurality of spliced ​​filter elements 10. The number of the spliced ​​filter elements 10 can be 3, 5, 7 or the like. For the sake of convenience, only one spliced ​​filter element is shown in the figure.

[0070] The cylinder 7 has a cavity 71 with an upper opening, a feed port 72 and a discharge port 73 .

[0071] The upper sealing cover 8 is openably and closably arranged at the upper end of the cylinder 7, and can be used to close the upper end opening of the cylinder. Specifically, the upper sealing cover 8 can be clamped with the cylinder by a clamp, which is convenient for disassembly and assembly.

[0072] The filter element positioning assembly is arranged inside the cylinder body for positioning and installing the filter element. The spliced ​​filter element 10 can be installed into the cylinder body through the upper end opening of the cylinder body 7 and positioned and matched with the filter element positioning assembly for fluid filtration.

[0073] The above-mentioned spliced ​​filter element 10 adopts the spliced ​​filter element as shown in the third embodiment.

[0074] The filter element positioning assembly includes a faceplate 91, a pressure plate 92, a plurality of fastening rods 93, a locking nut 94, etc. The faceplate 91 is arranged near the bottom of the cylinder 7. The faceplate 91 divides the cavity 71 inside the cylinder 7 into a liquid inlet cavity and a liquid outlet cavity. The faceplate 91 is also provided with a plurality of circumferentially evenly distributed sockets, which are connected up and down and are compatible with the second connecting ring 41; the fastening rods 93 are also evenly distributed on the faceplate 91, and the upper ends of the fastening rods 93 can pass through the pressure plate 92 and are formed with external threads, and the locking nut 94 is threadedly matched with the fastening rods 93.

[0075] When installing a spliced ​​filter element in the above-mentioned filter, firstly, a plurality of spliced ​​filter elements 10 are respectively inserted into each socket through the second connecting ring 41 at the lower end, and then the pressure plate 92 is inserted, and the hole on the pressure plate 92 is aligned with the fastening rod 93, so that the pressure plate 92 is sleeved on the fastening rod 93 and placed above each spliced ​​filter element 10, and then the locking nut 94 is installed on the upper end of the fastening rod 93 and locked. After the locking nut 94 is locked, it can force the pressure plate 92 to press the spliced ​​filter element 10 downward; finally, the upper cover 8 is covered and the upper end opening of the cylinder 7 is closed.

[0076] When disassembling the spliced ​​filter element in the above filter, the upper cover 8 is opened, the locking nut 94 is loosened, and the pressing plate 92 is removed, and then the spliced ​​filter element can be directly taken out.

[0077] When disassembling and assembling the spliced ​​filter element, the staff can directly grasp the spliced ​​filter element through the U-shaped handle, which greatly facilitates the operation and improves the disassembly and assembly efficiency.

[0078] Of course, when the spliced ​​filter element is inserted into the socket through the second connecting ring, a second sealing ring is provided on the outer sleeve of the second connecting ring to ensure reliable sealing between the second connecting ring and the socket to prevent leakage.

[0079] In addition, the feed port 72 of the cylinder 7 is connected to the liquid inlet cavity, and the discharge port 73 is connected to the liquid outlet cavity. During filtering, the filter medium flows into the liquid inlet cavity from the feed port 72, and then flows from the outside to the inside of the filter part to achieve filtration. The medium on the inside of the filter part flows into the liquid outlet cavity through the opening at the lower end of the spliced ​​filter element, and finally flows out from the discharge port 73. Embodiment 6

[0080] like Figure 12-Figure 15 As shown, a filter comprises a barrel 7, an upper cover 8, a filter element positioning assembly and three spliced ​​filter elements 10. Of course, the number of the spliced ​​filter elements 10 can be 5, 7, etc.

[0081] The cylinder 7 has a cavity 71 with an upper opening, a feed port 72 and a discharge port 73 .

[0082] The upper sealing cover 8 is openably and closably arranged at the upper end of the cylinder 7, and can be used to close the upper end opening of the cylinder. Specifically, the upper sealing cover 8 can be clamped with the cylinder by a clamp, which is convenient for disassembly and assembly.

[0083] The filter element positioning assembly is arranged inside the cylinder body for positioning and installing the filter element. The spliced ​​filter element 10 can be installed into the cylinder body through the upper end opening of the cylinder body 7 and positioned and matched with the filter element positioning assembly for fluid filtration.

[0084] The above-mentioned spliced ​​filter element 10 adopts the spliced ​​filter element as shown in the fourth embodiment.

[0085] The filter element positioning assembly includes a faceplate 91 and a filter element retainer. The faceplate 91 is arranged near the top of the cylinder 7. The faceplate 91 divides the cylinder 7 into a liquid inlet chamber and a liquid outlet chamber. The faceplate 91 is also provided with a plurality of sockets 911 that can be adapted to the first connecting ring 31, and the sockets 911 are connected up and down.

[0086] The filter element holder includes a U-shaped holder 96 and a limiting cross bar 97. The U-shaped holder 96 is a U-shaped structure and can hook the U-shaped handle. The limiting cross bar 97 is connected to the U-shaped holder 96. The limiting cross bar 97 and the U-shaped holder 96 can be an integral structure or can be separately arranged. When they are separately arranged, a connecting hole is formed on the U-shaped holder 96, and the limiting cross bar 97 can penetrate the connecting hole to form a connection with the U-shaped holder 96, so that installation and assembly are more convenient.

[0087] The position of the faceplate 91 corresponding to the socket 911 is also provided with a bayonet 912 adapted to the limiting crossbar 97, which can be used to place the limiting crossbar 97. The limiting crossbar can directly form a limiting clamping connection with the bayonet to realize the limiting installation of the limiting crossbar, such as setting the bayonet into an L shape, or the limiting crossbar can be restricted in the bayonet by an additional pressure plate to realize the limiting installation, and the pressure plate can be detachably connected to the faceplate by bolts.

[0088] When installing a spliced ​​filter element in the above-mentioned filter, first assemble the U-shaped retaining piece 96 and the limiting cross bar 97 to the U-shaped handle at the uppermost end of the spliced ​​filter element, and then sequentially pass a plurality of spliced ​​filter elements 10 through the socket 911 from top to bottom, and the first connecting ring 31 at the uppermost end of the spliced ​​filter element is retained in the socket 911, and the limiting cross bar 97 is snapped into the snap-on socket of the face disc, thereby fixing and locking the limiting cross bar 97 on the face disc 91, and finally cover the upper cover 8 to close the upper end opening of the cylinder 7.

[0089] When disassembling the spliced ​​filter element in the above filter, the upper cover 8 is opened, and the limiting cross bar 97 is unlocked, so that the spliced ​​filter element can be directly taken out.

[0090] In addition, the filter element holder can also be a filter element holding basket arranged at the bottom of the faceplate 91, and the filter element holding basket limits the position of the spliced ​​filter element to prevent the spliced ​​filter element from sliding down or shifting. Similarly, a pressure plate can be detachably installed on the upper end of the faceplate to limit the upper end of the spliced ​​filter element, making the disassembly and assembly operation of the spliced ​​filter element in the filter more convenient.

[0091] In addition, when disassembling and assembling the spliced ​​filter element, the staff can directly grasp the spliced ​​filter element through the U-shaped handle, which greatly facilitates the operation and improves the disassembly and assembly efficiency.

[0092] Of course, when the first connecting ring of the spliced ​​filter element is retained in the socket 911, a third sealing ring is provided on the outer sleeve of the first connecting ring to ensure reliable sealing between the first connecting ring and the socket to prevent leakage.

[0093] In addition, the feed port 72 of the cylinder 7 is connected to the liquid inlet cavity, and the discharge port 73 is connected to the liquid outlet cavity. During filtering, the filter medium flows into the liquid inlet cavity from the feed port 72, and then flows into the inner side of the filter part through the opening at the upper end of the spliced ​​filter element, and then flows from the inner side of the filter part to the outer side to achieve filtration and flow into the liquid outlet cavity, and finally flows out from the discharge port 73.

[0094] The spliced ​​filter element, spliced ​​filter element unit and filter shown in the above embodiments have the following beneficial effects:

[0095] 1. The filter element assembly is assembled by splicing a number of splicable filter element units and a sealing cover. You can choose to splice different numbers of splicable filter element units to change the length of the filter element assembly, and you can also adapt to different filters by changing the installation position of the sealing cover. It has better versatility. You only need to produce one splicable filter element unit to make a variety of filter element assemblies of different specifications and types by splicing, which is more conducive to batch production and processing, and reduces production costs;

[0096] 2. The splicing structure is simple, and the assembly and disassembly operations are convenient. It can be assembled by the customer by themselves, which is not only more convenient for packaging and transportation, but also when replacing and maintaining the filter element, you can choose to only replace the splicing filter element unit at the lower end and with more serious wear, and extend the service life of the splicing filter element unit at the upper end, thereby reducing the customer's filtration cost;

[0097] 3. The U-shaped handle can not only be used as a connecting structure to cooperate with the annular pull ring to achieve splicing and locking, but can also be used as a handle. When installing and removing the spliced ​​filter element in the filter, the operator can hold the U-shaped handle to operate, which is more convenient to put in or take out the spliced ​​filter element.

[0098] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0099] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0100] Technical personnel should note that: Although the present invention has been described according to the above specific implementation methods, the inventive concept of the present invention is not limited to this invention, and any modification using the inventive concept will be included in the scope of protection of this patent right.

Claims

1. A spliced ​​filter element, characterized in that: It comprises a filter element assembly (1) and a sealing cover (2); The filter element assembly (1) is composed of a plurality of connectable filter element units, wherein the connectable filter element units include: Filter unit (11); An upper end cover (12) is arranged at the upper end of the filter portion (11), a first through hole (121) communicating with the hollow of the filter portion is formed at the center of the upper end cover (12), and a first connection structure is formed at the end of the upper end cover (12); A lower end cover (13) is arranged at the lower end of the filter portion (11), a second through hole (131) communicating with the hollow of the filter portion is formed at the center of the lower end cover (13), and a second connection structure is formed at the end of the lower end cover (13); The filter element assembly (1) is formed by splicing a plurality of splicable filter element units together through a first connecting structure and a second connecting structure; The sealing cover (2) comprises a cover body (21), and a first connecting structure and a second connecting structure are respectively formed on both end surfaces of the cover body (21), and the sealing cover (2) is spliced ​​to the upper end or the lower end of the filter element assembly (1) via the first connecting structure and the second connecting structure; Wherein, the first connection structure comprises: First connecting ring (31): A U-shaped handle (32) located on the inner side of the first connecting ring (31); The second connection structure includes: A second connecting ring (41) adapted to fit the first connecting ring (31); An annular pull ring (42) located on the inner side of the second connecting ring (41), the annular pull ring (42) having two symmetrically formed lower end openings and "7"-shaped clamping grooves (421); When the first connection structure and the second connection structure are spliced ​​together, the first connection ring (31) and the second connection ring (41) are sleeved together and sealed, and the annular pull ring (42) is limitedly engaged with the U-shaped handle (32) through the engagement groove (421).

2. The spliced ​​filter element according to claim 1, characterized in that: The outer sleeve of the second connecting ring (41) is provided with a first sealing ring (5), and the second connecting ring (41) and the first connecting ring (31) are sealed by the first sealing ring (5).

3. The spliced ​​filter element according to claim 1, characterized in that: It also includes a sealing gasket (6), and the first connecting structure and the second connecting structure are mutually locked and apply axial force through a U-shaped handle (32) and an annular pull ring (42), which can drive the first connecting ring (31) and / or the second connecting ring (41) to press the sealing gasket (6) and maintain the seal.

4. The spliced ​​filter element according to claim 1, characterized in that: The clamping slot (421) comprises a transverse section and a longitudinal section, and the transverse section of the clamping slot (421) is formed with a limiting protrusion (422) for forming a limiting match with the U-shaped handle (32).

5. A splicable filter element unit, characterized in that: include: Filter unit (11); An upper end cover (12) is arranged at the upper end of the filter portion (11), a first through hole (121) communicating with the hollow of the filter portion is formed at the center of the upper end cover (12), and a first connection structure is formed at the end of the upper end cover (12); A lower end cover (13) is arranged at the lower end of the filter portion (11), a second through hole (131) communicating with the hollow of the filter portion is formed at the center of the lower end cover (13), and a second connection structure is formed at the end of the lower end cover (13); Wherein, the first connection structure comprises: First connecting ring (31): A U-shaped handle (32) located on the inner side of the first connecting ring (31); The second connection structure includes: A second connecting ring (41) adapted to fit the first connecting ring (31); An annular pull ring (42) located on the inner side of the second connecting ring (41), the annular pull ring (42) having two symmetrically formed lower end openings and "7"-shaped clamping grooves (421); The first connection structure and the second connection structure can be spliced ​​together. When spliced ​​together, the first connection ring (31) and the second connection ring (41) are sleeved together, and the annular pull ring (42) is limitedly engaged with the U-shaped pull handle (32) through the engagement groove (421).

6. A filter, characterized in that: include: A cylinder (7) having a cavity with an open upper end; An upper sealing cover (8) which is openably and closably arranged at the upper end of the cylinder (7) and is used to seal the upper end opening of the cylinder (7); A filter element positioning assembly, which is arranged inside the cylinder and is used for positioning and installing the filter element; And the spliced ​​filter element (10) according to any one of claims 1 to 4, which can be installed into the cylinder (7) through the upper end opening of the cylinder (7) and positioned and matched with the filter element positioning assembly.

7. The filter according to claim 6, characterized in that The filter element positioning assembly comprises a faceplate (91) which is arranged in a position close to the bottom of the cylinder (7), the faceplate (91) dividing the cylinder (7) into a liquid inlet cavity and a liquid outlet cavity, and the faceplate (91) is also provided with a plurality of sockets which can be matched with the second connecting ring (41), and the sockets are connected up and down; The sealing cover (2) of the spliced ​​filter element (10) is spliced ​​to the upper end of the filter element assembly (1), so that the upper end of the spliced ​​filter element (10) remains closed, and the lower end of the spliced ​​filter element (10) is inserted into the socket via a second connecting ring and remains sealed with the socket.

8. The filter according to claim 7, characterized in that The filter element positioning assembly also includes: A pressure plate (92) disposed inside the cylinder (7) and located above the spliced ​​filter element (10); A plurality of fastening rods (93) evenly distributed on the faceplate (91), wherein the upper ends of the fastening rods (93) pass through the pressing plate (92) and are formed with external threads; The locking nut (94) is threadably matched with the fastening rod (93); after the locking nut (94) is locked, it can force the pressure plate (92) to press the spliced ​​filter element (10) downward.

9. The filter according to claim 6, characterized in that The filter element positioning assembly comprises a faceplate (91) which is arranged in a position close to the top of the cylinder (7), the faceplate (91) dividing the cylinder (7) into a liquid inlet cavity and a liquid outlet cavity, and the faceplate (91) is also provided with a plurality of sockets (911) which can be matched with the first connecting ring (31), and the sockets (911) are connected up and down; The sealing cover (2) of the spliced ​​filter element (10) is spliced ​​to the lower end of the filter element assembly (1), so that the lower end of the spliced ​​filter element (10) remains closed; the spliced ​​filter element (10) passes through the socket (911) from top to bottom, and the first connecting ring at the uppermost end of the spliced ​​filter element (10) is retained in the socket (911) and remains sealed with the socket (911).

10. The filter according to claim 9, characterized in that The filter element positioning assembly further comprises a filter element retainer for retaining the spliced ​​filter element (10) in the socket (911), the filter element retainer comprising: A U-shaped retaining member (96) configured to cooperate with the U-shaped handle in a limiting manner; A limiting cross bar (97) is connected to the U-shaped retaining member (96) and is detachably mounted on the faceplate (91).

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