Water treatment filters and fluid components

Abstract

The present invention provides a water treatment filter, which is mainly used for water treatment in advanced environmental protection industries and includes a three-way pipe assembly, a branch pipe assembly and a filter assembly. The three-way pipe body has a filter abutment surface and an inner cavity for accommodating the filter assembly enclosed based on the filter abutment surface. The front end surface of the grid is attached to the filter abutment surface and the busbars on both sides of the filter are attached to the inner wall of the inner cavity, and the projection of the filter in the fluid direction completely covers the flow section of the flow channel. The rear end of the grid extends into the branch pipe and the filter has an impurity storage slot, and the grid extending into the branch pipe and the inner wall of the branch pipe are enclosed to form an impurity storage tank located outside the flow section of the flow channel. The water treatment filter provided by the present invention not only has small filtration pressure loss, large filtration area, high filtration accuracy, but also has advanced advantages such as good sealing, impurity storage isolation, easy cleaning of impurities and low maintenance frequency of the filter, so as to well meet the high-performance water treatment system for domestic water and industrial water.

Description

Technical Field

[0001] The invention relates to the technical field of fluid pipeline transportation, and in particular to a water treatment filter and a fluid component. Background Art

[0002] With the rapid development of social economy and the acceleration of urbanization, environmental problems such as water pollution, solid waste pollution and air pollution have become increasingly serious. Water is a necessary condition for the existence of life and economic development. Both domestic and industrial water need to meet the corresponding water quality standards. Therefore, water treatment has gradually become an advanced environmental protection industry in recent years. As a necessary component of the water treatment system, the structure and installation method of the filter and the treatment of impurities after the filter intercepts will affect the filtration performance, which will seriously affect the quality standards of the treated water.

[0003] At present, the filters in water treatment systems mainly include Y-type filters (such as Figure 1 As shown in the figure), YQ type filter and T type filter, when filtering, the fluid of these three types of filters must first enter the filter cartridge installed on the side branch for filtration before flowing out from the outlet. The change of fluid direction during the filtration process will cause the loss of fluid pressure, reduce the pump head, and increase the power consumption and load of the motor. Furthermore, the grid in the existing filter is formed by curling the perforated plate. The grid structure not only has a small flow area but also has a large flow resistance, which seriously affects the performance of the filter. In addition, most of the existing filters are not equipped with an impurity storage area. Part of the impurities intercepted by the filter are attached to the surface of the filter, and the other part is accumulated in the pipe on the fluid inlet side and constantly follows the fluid backflow to block the filter.

[0004] In order to achieve the treatment of filtered impurities, some filters are provided with a trough in the tube body so that the intercepted impurities can be collected in the trough and the cleaning time of the filter screen can be extended, as shown in Chinese patent CN210186659U. However, since the trough is located in the flow channel of the tube body, the impurities collected in the trough will still flow back to the inlet side with the fluid and block the filter screen, resulting in very limited improvement in the cleaning of the filter screen; and what is worse is that this impurity trough located in the flow channel of the tube body also connects the fluid inlet side and the outlet side, thereby causing a large amount of impurities to directly enter the outlet side and seriously affect the filtering performance. In addition, some people have proposed to set an impurity collection chamber in the filter cartridge to avoid impurity backflow, as shown in Chinese patent CN217139437U. This structure hopes to use the fluid to flush the filter mesh holes and bring the flushed impurities into the impurity collection chamber located above the partition in the filter cartridge. However, since the impurity collection chamber is located above the filter hole, during actual filtration, the fluid's impact force mainly acts on the impurities adhering to the filter surface, causing the impurities to be embedded in the filter holes and block the filter, and it is difficult for the impurities to follow the fluid into the impurity collection chamber above the partition. Furthermore, since the fluid force acting on the partition is small and uncontrollable, the partition is very likely to fail to open during filtration, or the impurities in the collection chamber fall back into the flow channel under the action of gravity after opening, making it difficult to effectively collect and clean the impurities.

[0005] In order to solve the problems of large fluid pressure loss and difficult handling of intercepted impurities during filtration, Chinese patent CN116422031A proposes a fluid filter in which the direction of the fluid is not changed during the filtration process and an impurity sink is formed on the filter. The filter fixing cavity in the fluid filter of this structure is surrounded by sheet-like connecting pieces; due to the limitations of the sheet material processing technology, it is necessary to assemble and weld multiple connecting pieces in sequence to increase the filter fixing cavity. Therefore, not only are the structure and installation method of the filter complex, but there are also many welding points in the main part of the filter, resulting in a significant increase in the leakage risk of the overall product. Furthermore, the impurity sink in the filter of this structure is formed based on a sheet-type grid, and the storage space for impurities is very limited, resulting in the need for frequent cleaning of the filter. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a water treatment filter and a fluid component.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a water treatment filter, which includes a three-way pipe assembly, a branch pipe assembly and a columnar filter assembly. The three-way pipe assembly includes a three-way pipe body, the three-way pipe body has a substantially coaxial fluid inlet and fluid outlet and a branch pipe opening whose axis is substantially perpendicular to the axis of the fluid inlet, and a substantially planar filter abutment surface is formed on the inner wall of the three-way pipe body opposite to the branch pipe opening, and an inner cavity for accommodating the filter assembly is formed based on the filter abutment surface. The branch pipe assembly includes a branch pipe welded to the branch pipe opening and a locking member arranged at one end of the branch pipe away from the branch pipe opening. The columnar filter assembly includes a grid and a cylindrical or curved filter arranged on the grid. The filter assembly extends into the inner cavity of the tee tube body along the branch pipe. The front end surface of the grid is fitted to the filter abutment surface and the busbars on both sides of the filter are fitted to the inner wall of the inner cavity. The projection of the filter in the fluid direction completely covers the flow section of the flow channel. The rear end of the grid extends into the branch pipe through the lowest busbar of the inner wall of the tee tube body. The filter is provided with an impurity storage slot opening opening toward the fluid inlet. An impurity storage slot located outside the flow section of the flow channel and opening toward the fluid inlet is formed between the grid and the inner wall of the branch pipe at the impurity storage slot. The lowest busbar of the inner wall refers to the busbar of the inner wall of the tee tube passing through the largest cross-section of the tee tube body and close to the side of the branch pipe. The locking piece on the branch pipe assembly seals and locks the filter assembly in the branch pipe and the tee tube body.

[0008] According to an embodiment of the present invention, the filter assembly is cylindrical, and the filter is integrally arranged along the circumference of a mesh frame having a circular cross section.

[0009] According to one embodiment of the present invention, another impurity storage groove is formed between the inner cavity of the filter located in the branch pipe and the locking piece on the branch pipe assembly; the locking piece includes a pair of locking thread pairs, and the locking thread pairs seal and lock the filter assembly in the branch pipe and the three-way pipe body by pressing the sealing surface against the sealing piece.

[0010] According to one embodiment of the present invention, the filter screen is a cylindrical filter screen with uniform mesh size;

[0011] Alternatively, the filter includes a semi-cylindrical primary filter located on the fluid inlet side and a semi-cylindrical secondary filter located on the fluid outlet side, the impurity storage slot is formed on the side where the primary filter is located and the mesh number of the primary filter is smaller than the mesh number of the secondary filter.

[0012] According to one embodiment of the present invention, the filter assembly is an open semi-cylindrical shape, and the peripheral wall of the grid close to the fluid outlet side is covered with a curved metal filter cloth, and the open part of the metal filter cloth forms an impurity storage slot facing the fluid inlet.

[0013] According to one embodiment of the present invention, the filter abutment surface is protruded outward from the tee pipe fitting, and the filter abutment surface is higher than the highest busbar of the tee pipe body; or, the filter abutment bottom surface is roughly flush with the highest busbar of the inner wall of the tee pipe body, and the highest busbar of the inner wall refers to the busbar of the inner wall of the tee pipe that passes through the largest cross-section of the tee pipe body and is opposite to the lowest busbar of the inner wall.

[0014] According to one embodiment of the present invention, a branch pipe step for placing a seal is formed on the branch pipe, and the locking thread pair includes an internal thread located on the branch pipe and a locking screw matched with the internal thread, and the front end surface of the locking screw presses the seal;

[0015] Alternatively, the locking thread pair includes an external thread on the branch pipe and a flat-bottom screw cover matched with the external thread, and the sealing member is arranged on the bottom surface of the flat-bottom screw cover and is pressed against the end of the branch pipe.

[0016] According to an embodiment of the present invention, a multi-sided screwing portion is provided on the locking screw or the flat-bottomed screw cover.

[0017] According to an embodiment of the present invention, an anti-mistake portion is formed on the filter screen abutment surface, and an anti-mistake groove having a shape matching the anti-mistake portion is provided on the extended front end surface of the filter screen assembly.

[0018] According to one embodiment of the present invention, a connecting thread is formed on the fluid inlet end or the fluid outlet end of the three-way pipe body;

[0019] The connecting thread is directly formed on the fluid inlet end pipe wall or the fluid outlet end pipe wall of the tee pipe body;

[0020] Alternatively, the tee pipe fitting further comprises an interface threaded bushing sleeved on the fluid inlet end or the fluid outlet end of the tee pipe body, and the interface threaded bushing has an internal thread or an external thread;

[0021] Alternatively, the three-way pipe fitting further comprises a threaded joint welded to the fluid inlet end or the fluid outlet end of the three-way pipe body, and an internal thread or an external thread is formed on the threaded joint.

[0022] According to an embodiment of the present invention, the tee pipe assembly further comprises a polygonal ring sleeve arranged at the fluid inlet end or the fluid outlet end of the tee pipe body.

[0023] According to one embodiment of the present invention, the water treatment filter further comprises a filter element disposed in the filter screen, and the filter element is one or more combinations of a PP cotton filter element, an activated carbon filter element and a hollow fiber ultrafiltration membrane.

[0024] According to one embodiment of the present invention, the grid is a frame structure;

[0025] The mesh frame includes a front fixing frame, a middle fixing ring and a mouth fixing frame which are sequentially distributed along the axial direction of the filter assembly and used to support and fix the filter. The front end surface of the front fixing frame abuts against the filter abutting surface on the three-way pipe body.

[0026] Alternatively, the grid includes a front fixing frame and two semi-cylindrical grid frames, the two semi-cylindrical grid frames are relatively welded and connected to the front fixing frame, and the front end surface of the front fixing frame abuts against the filter abutment surface on the three-way pipe body.

[0027] On the other hand, the present invention also provides a fluid component, which includes a flow-through body and any one of the above-mentioned water treatment filters. The water treatment filter is connected to the input end or the output end of the flow-through body.

[0028] According to an embodiment of the present invention, the flow-through body is any one of a water distributor, a bellows, a ball valve, a gate valve, a stop valve, a throttle valve, and a butterfly valve.

[0029] In summary, in the water treatment filter and fluid assembly provided by the present invention, the filter assembly is accommodated in the inner cavity formed by the filter abutment surface in the three-way pipe body. During filtration, the fluid passes through the filter along the axial direction of the three-way pipe body without changing the flow direction to greatly reduce the fluid pressure drop loss; and the integrated inner cavity structure also makes the installation of the filter assembly have the advantages of simple structure, less process pollution, fewer welding points and good sealing. The setting of the filter abutment surface on the inner cavity, which is roughly flat, enables the insertion front end of the filter assembly to fit well on the filter abutment surface after assembly, which is not only stable in assembly but also does not have a flow gap between the two, thereby greatly improving the filtration performance. Further, in the water treatment filter provided by the present invention, the rear end of the grid extends into the branch pipe and the filter has an impurity storage slot opening facing the fluid inlet. This setting enables the grid and the inner wall of the branch pipe to enclose an external impurity storage slot located at the flow section of the flow channel. The impurities entering the impurity storage slot after filtration are isolated from the flow channel in the three-way pipe body, and the impurities will no longer follow the fluid to continuously flow back on the inlet side and block the filter. In addition, the columnar filter assembly also makes the impurity storage tank present a large-capacity semi-columnar shape, which effectively reduces the frequency of cleaning the filter and greatly facilitates the maintenance of the filter assembly.

[0030] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The figure shows a schematic diagram of the structure of a Y-type filter in the prior art.

[0032] Figure 2 Shown is a schematic diagram of the internal structure of the water treatment filter provided in Example 1 of the present invention.

[0033] Figure 3 Shown Figure 2 Orthographic projection diagram of .

[0034] Figure 4 and Figure 5 Shown Figure 2 The schematic diagram of the structure of the water treatment filter shown is shown in another perspective.

[0035] Figure 6 Shown Figure 2 Schematic diagram of the structure of the middle three-way pipe body.

[0036] Figure 7 Shown Figure 6 Schematic cross-section diagram of .

[0037] Figure 8 Shown Figure 2 Schematic diagram of the structure of the middle filter assembly.

[0038] Fig. 9 Shown Figure 8 Schematic diagram of the structure from another perspective.

[0039] Fig.10 Shown is a schematic structural diagram of a three-way pipe body provided in another embodiment of the present invention.

[0040] Fig.11 Shown Figure 2 Schematic diagram of the structure of a pair of locking thread pairs.

[0041] Fig.12 Shown Fig.11 Schematic diagram of the structure from another perspective.

[0042] Fig.13 Shown is a schematic structural diagram of a water treatment filter provided by another embodiment of the present invention.

[0043] Fig.14 Shown is a schematic structural diagram of a water treatment filter provided by another embodiment of the present invention.

[0044] Fig.15 Shown Fig.14 A magnified schematic diagram of center A.

[0045] Fig.16 Shown Fig.14 Schematic diagram of the processing of the inner sleeve of the middle screw.

[0046] Fig.17 Shown Figure 2 Schematic diagram of the structure of the multilateral ring.

[0047] Fig.18 Shown is a schematic structural diagram of the fluid component provided in this embodiment.

[0048] Fig.19 Shown is a schematic structural diagram of a fluid component provided in another embodiment of the present invention.

[0049] Fig. 20 Shown is a schematic structural diagram of the filter assembly provided in Embodiment 2 of the present invention.

[0050] Fig.21 and Fig. 22 A schematic structural diagram of a filter assembly provided in another embodiment of the present invention.

[0051] Fig.23 Shown is a schematic structural diagram of the filter assembly provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0052] Embodiment 1

[0053] like Figures 2 to 9 As shown, the present embodiment provides a water treatment filter including a three-way pipe assembly 1, a branch pipe assembly 2 and a columnar filter assembly 3. The three-way pipe assembly 1 includes a three-way pipe body 11, which has a substantially coaxial fluid inlet 111 and a fluid outlet 112 and a branch pipe opening 113 whose axis is substantially perpendicular to the axis of the fluid inlet 111. A substantially planar filter abutment surface 114 is formed on the inner wall of the three-way pipe body 11 opposite to the branch pipe opening 113, and an inner cavity 115 for accommodating the filter assembly is formed based on the filter abutment surface 114. The branch pipe assembly 2 includes a branch pipe 21 welded to the branch pipe opening 113 and a locking member arranged at one end of the branch pipe 21 away from the branch pipe opening 113. The columnar filter assembly 3 includes a mesh frame 31 and a cylindrical or curved filter 32 arranged around the mesh frame 31. The filter assembly 3 extends along the branch pipe 21 into the inner cavity 115 of the three-way pipe body. The front end surface 310 of the mesh frame 31 is attached to the filter abutment surface 114 and the generatrix on both sides of the filter 32 is attached to the inner wall of the inner cavity 115. The projection of the filter 32 in the direction of the fluid completely covers the flow section of the flow channel. The rear end of the mesh frame 31 passes through the lowest generatrix KK line (such as the inner wall of the three-way pipe body 11) of the inner wall of the three-way pipe body 11. Figure 7 ) extends into the branch pipe 21, the filter screen 32 has an impurity storage slot 321 opening toward the fluid inlet, and the impurity storage slot 321 is surrounded between the grid 31 and the inner wall of the branch pipe 21 to form an impurity storage slot 320 located outside the flow passage cross section and opening toward the fluid inlet 111. The lowest busbar KK of the inner wall refers to the busbar of the inner wall of the tee pipe passing through the largest cross section of the tee pipe body and close to the side of the branch pipe 21. The locking piece on the branch pipe assembly 2 seals and locks the filter screen assembly 3 in the branch pipe 21 and the tee pipe body 11.

[0054] The water treatment filter provided in this embodiment is directly based on the integrated inner cavity 115 in the three-way tube body 11 to accommodate the filter assembly 3; this arrangement greatly simplifies the installation of the filter assembly 3, and not only is the filter easy to disassemble, but also has fewer welding points, good sealing, and a large accommodating space. Furthermore, the assembly of the filter assembly 3 based on the inner cavity 115 also allows the fluid to directly penetrate the filter 32 along the axial direction of the three-way tube body 11 during filtration without changing the flow direction, thereby effectively solving the problem of excessive fluid pressure loss caused by changes in fluid direction in existing filters. Specifically, as Figure 6 and Figure 7 As shown, the three-way tube body 11 is a stainless steel thin-walled equal-diameter three-way tube body with a roughly circular cross-section. It uses a thin-walled round tube to form a branch pipe opening 113 through a hole-pulling process, and then forms a filter abutment surface 114 and an inner cavity 115 formed based on the filter abutment surface 114 through hydraulic stretching or internal high-pressure forming. The forming method of the three-way tube body 11 is simple, efficient and pollution-free; however, the present invention does not impose any restrictions on the wall thickness of the three-way tube body and its forming method. In other embodiments, a more complex casting process can also be used to form a thick-walled three-way tube body; the three-way tube body can also be a non-equal-diameter three-way tube body in which the inner diameter of the branch pipe opening is slightly larger than the inner diameter of the fluid inlet or the inner diameter of the fluid outlet. The thin-walled pipe fittings referred to in this embodiment are: for a tee pipe body 11 with an outer diameter less than 20 mm, if the pipe wall thickness is within 2 mm, it is a thin-walled pipe fitting; for a tee pipe body 11 with an outer diameter greater than or equal to 20 mm and less than or equal to 50 mm, if the pipe wall thickness is within 3 mm, it is a thin-walled pipe fitting; for a tee pipe body 11 with an outer diameter greater than or equal to 50 mm and less than or equal to 100 mm, if the pipe wall thickness is within 4 mm, it is a thin-walled pipe fitting.

[0055] In this embodiment, the arrangement of the filter screen contact surface 114 enables the front end face 310 of the mesh frame and the busbars on both sides of the filter screen 32 to fit well with the inner wall of the inner cavity 115, and there is no gap between the filter screen 32 and the inner cavity 115 that directly connects the fluid inlet 111 and the fluid outlet 112 to improve the filtering accuracy. At the same time, the filter screen contact surface 114 also provides a plane support for the front end face 310 of the mesh frame, so that the filter screen assembly 3 can be stably assembled in the inner cavity 115 after the locking thread pair is tightly sealed to withstand the impact of the fluid. In addition, the plane-fitting mesh frame front end face 310 also allows the metal mesh cloth to form a cylindrical or curved filter screen by bending along the circumferential direction; compared with the existing special-shaped filter screen structure with inclined or spherical ends that can only be formed manually, with low forming efficiency and precision and poor consistency after forming, the filter screen 32 in this embodiment is not only simple in structure but can also be formed automatically by machine, so it has the advantages of high processing efficiency and good consistency after forming.

[0056] like Figure 6 and Figure 7As shown, the inner cavity 115 is a cylindrical inner cavity with the filter abutment surface 114 as the bottom surface and the tube wall protruding outward near it. The flow area at the inner cavity 115 is larger than the flow area at the fluid inlet 111 of the three-way tube body, thereby providing a large accommodation space for the filter assembly 3 so that the filter can have a larger filtering area. Specifically, in this embodiment, the filter assembly 3 is a cylindrical structure, and the corresponding inner cavity 115 is also a cylindrical structure. However, the present invention does not impose any limitation on this. In other embodiments, when the filter assembly is semi-cylindrical, the inner cavity can also be set to be semi-cylindrical or cylindrical; or, in other embodiments, the filter assembly and the inner cavity can also be set to be truncated cone-shaped. In order to further increase the volume of the inner cavity 115, in this embodiment, the filter abutment surface 114 is arranged to protrude outward from the tee pipe fitting 11, and the filter abutment surface 114 is higher than the highest busbar (K'-K') of the tee pipe body 11, thereby increasing the space of the inner cavity 115 in the axial direction of the branch pipe opening 113. The highest busbar (K'-K') of the inner wall refers to the busbar of the inner wall of the tee pipe that passes through the largest cross-section of the tee pipe body 11 and is opposite to the lowest busbar (KK) of the inner wall. However, the present invention does not impose any limitation on this. In other embodiments, the bottom surface of the filter abutment may also be roughly flush with or lower than the highest busbar of the inner wall of the tee pipe body.

[0057] In this example, the filter assembly 3 is cylindrical, and the filter 32 is integrally arranged around the frame 31 with a circular cross section along the circumferential direction. Figure 2 and Figure 8 As shown, the mesh frame 31 includes a front end fixing frame 311, a middle fixing ring 312 and a mouth fixing frame 313 which are distributed in sequence along the axial direction of the filter assembly 3 and are approximately circular. The front end face of the front end fixing frame 311 becomes the front end face 310 of the mesh frame to abut against the filter abutting surface 114 on the three-way pipe body 11. The metal mesh cloth is circumferentially coated and welded to the front end fixing frame 311, the middle fixing ring 312 and the mouth fixing frame 313 to form a cylindrical filter 32. The cylindrical filter 32 is formed with an impurity storage slot 321 opening toward the fluid inlet 111 between the middle fixing ring 312 and the mouth fixing frame 313; the mesh frame 31 also includes a partition plate 314 arranged between the middle fixing ring 312 and the mouth fixing frame 313 and opposite to the impurity storage slot 321. The rear end of the grid 31 extends into the branch pipe 21 through the lowest busbar KK of the inner wall of the three-way pipe body. This arrangement enables the mouth fixing frame 313 to be located in the branch pipe 21. An impurity storage tank 320 away from the flow section of the flow channel in the three-way pipe body 11 is formed between the partition 314, the mouth fixing frame 313 and the inner wall of the branch pipe 21. The partition 314 blocks the direct connection between the inside of the cylindrical filter screen 32 and the impurity storage tank 320.

[0058] In practical applications, the water treatment filter provided in this embodiment is installed in the pipeline system in a manner that the axis of the branch pipe 21 is horizontal, the axis of the branch pipe 21 is vertically downward along the direction of gravity, or the axis of the branch pipe 21 intersects the direction of gravity at an acute angle. All three installation methods allow the impurities intercepted by the filter screen 32 on the fluid inlet side to enter and settle into the impurity storage tank 320 under the action of the gravity component. Since the impurity storage tank 320 is located outside the flow section of the flow channel, the fluid in the flow channel no longer acts on the precipitated impurities, that is, the precipitated impurities will no longer follow the fluid back to the inlet side and block the filter screen. In the water treatment filter provided in this embodiment, the impurity storage tank 320 realizes the collection and storage of filtered impurities, and more importantly, it also realizes the isolation of stored impurities and flow channels, thereby effectively avoiding the various problems caused by the reflux of impurities after precipitation, such as filtration accuracy, large filtration pressure loss, and easy clogging of the filter screen and frequent cleaning. Further, the impurity storage tank 320 formed based on the columnar grid 31 is not only convenient for impurity cleaning but also has a large space for impurity accommodation. This setting can further reduce the cleaning frequency of the filter screen and greatly facilitate the maintenance of the filter screen assembly.

[0059] In this embodiment, the partition 314 is a filter screen partition with filter holes. The partition 314 not only blocks the impurity storage tank 320 and the inside of the cylindrical filter screen 32, but also increases the filtering area. However, the present invention is not limited to this. In other embodiments, the partition may also be a solid partition. In this embodiment, if Figure 2 As shown, the mouth fixing frame 313 has an impurity through hole 3131 near the fluid outlet side that connects the interior of the cylindrical filter screen 32 and the locking thread pair at the end of the branch pipe 21. Another impurity storage groove 320' located outside the flow section of the flow channel is formed between the inner cavity of the filter screen 32 and the inner bottom surface of the locking member. Similarly, in other embodiments, the mouth fixing frame can also be set as a hollow ring, and the partition extends to the inner bottom surface of the locking member. In this case, the partition, the inner bottom surface of the locking member and the inner wall of the branch pipe will be surrounded by an impurity storage groove facing the fluid inlet side. Based on the other impurity storage groove 320' and / or the impurity storage groove 320 surrounded by the locking member, a drain valve 5 (such as Fig.13 As shown) to achieve the cleaning of impurities without removing the filter assembly 3, thereby better achieving the maintenance of the filter assembly.

[0060] In this embodiment, the filter screen 32 includes a primary filter screen 322 located at the fluid inlet side and a secondary filter screen 323 located at the fluid outlet side and a semi-cylindrical shape. The impurity storage slot 321 is formed on the side where the primary filter screen 322 is located, and the mesh number of the primary filter screen 322 is smaller than the mesh number of the secondary filter screen 323. The primary filter screen 322 with a small mesh number performs initial filtration on the fluid and the impurities after filtration are precipitated into the impurity storage tank 320. The fluid after primary filtration enters the interior of the cylindrical filter screen 32 and is filtered again by the secondary filter screen 323. The fine impurities filtered again are precipitated into another impurity storage tank 320'. However, the present invention does not impose any limitation on the mesh number of this cylindrical filter screen. In other embodiments, the filter screen can also be a cylindrical filter screen with a uniform mesh number. In this case, the filter screen still filters the fluid twice.

[0061] The impurity storage slot 321 on the filter assembly 3 facing the fluid inlet side requires the filter to be assembled into the three-way pipe body 11 along a predetermined direction. In order to avoid the filter assembly 3 from being assembled incorrectly, in this embodiment, a foolproof portion 116 is formed on the filter abutment surface 114, and a foolproof groove 3111 whose shape matches the foolproof portion 116 is formed on the front end surface 310 of the mesh frame. Specifically, as shown in FIG. Figure 6 and Figure 7 As shown in FIG. 1 , the fool-proof portion 116 is a triangular protrusion formed in the middle area of ​​the filter screen contact surface 114 and extending into the three-way pipe body 11. However, the present invention is not limited to this. In other embodiments, such as Fig.10 As shown, a triangular inner lining plate can also be added to the inner wall of the filter abutment surface 114 to form an anti-idiot portion 116. At the same time, the installation of the drain valve can be achieved based on the inner lining plate type anti-idiot portion 116. Specifically, a drain hole 1141 is provided on the filter abutment surface 114, and a lining plate hole 1161 coaxial with the drain hole 1141 is provided on the inner lining plate type anti-idiot portion 116. The drain valve 6 can be inserted into the drain hole 1141 and extended into the lining plate hole 1161 to be welded and connected to the water treatment filter. When the pipeline is inspected or the drainage is prevented from freezing in winter, the drain valve 6 can be opened to drain the water in the pipeline. However, the present invention does not impose any restrictions on the position of the anti-idiot portion and the anti-idiot groove and their specific shapes. Other anti-idiot structures that can achieve the limitation of the installation direction of the filter assembly are within the protection scope of the present invention.

[0062] In this embodiment, the locking member includes a pair of locking thread pairs, and the pair of locking thread pairs seals the filter assembly in the branch pipe 21 and the three-way pipe body 11 by pressing the sealing member 4 with the sealing surface; that is, the water treatment filter provided in this embodiment realizes the sealing and locking of the filter assembly 3 after assembly only by a pair of locking thread pairs. This setting is not only simple in structure and has few leakage points, but also the surface sealing method makes the sealing member 4 deform as a whole and has an excellent sealing effect. Specifically, in this embodiment, if Figure 2 and Fig.11As shown, a pair of locking thread pairs includes an external thread 211 located at the end of the branch pipe 21 and a flat-bottomed screw cover 22 that matches the external thread 211 of the branch pipe. The inner wall of the flat-bottomed screw cover 22 is formed with a screw cover step 220 for placing the seal 4. The end face of the branch pipe 21 and the screw cover step 220 serve as sealing surfaces to jointly press the seal 4 to achieve the sealing of the filter assembly 3. The provision of the screw cover step 220 increases the internal cavity of the flat-bottomed screw cover 22, which not only increases the storage volume of another impurity storage tank 320', but also provides a holding space for the handle 33 on the filter assembly 3. However, the present invention does not impose any limitation on this. In other embodiments, there is no need to provide a screw cover step on the flat-bottomed screw cover, and the seal is directly placed on the inner bottom surface of the flat-bottomed screw cover. The end face of the branch pipe and the inner bottom surface of the flat-bottomed screw cover serve as sealing surfaces to jointly press the seal. In addition, in order to facilitate the thread locking of the flat-bottomed threaded cover 22 and the external thread 211 on the branch pipe, in this embodiment, as Fig.12 As shown, the flat-bottomed screw cover 22 is also provided with a multi-sided screwing portion 224; for example, an outer hexagonal screwing portion formed on the outer peripheral wall of the flat-bottomed screw cover or an inner hexagonal screwing portion formed on the outer bottom wall of the flat-bottomed screw cover.

[0063] In this embodiment, if Fig.11 As shown, the flat-bottomed screw cap 22 includes a screw cap body 221 and a threaded sleeve 222 which is sleeved inside the screw cap body 221, and the threaded sleeve 222 has an internal thread. Correspondingly, the branch pipe assembly 2 also includes a branch pipe threaded sleeve 23 which is sleeved outside the end of the branch pipe 21, and the branch pipe threaded sleeve 23 has an external thread 211. The split structure allows the screw cap body 221 to be made of stainless steel with a thinner wall thickness, which not only has low material cost but also is easy to process. Similarly, the provision of the branch pipe threaded sleeve 23 allows the branch pipe 21 to be made of stainless steel with a thinner wall thickness to reduce material cost; on the other hand, the sealing surface of the seal 4 is formed based on the front end of the branch pipe threaded sleeve 23 with a thicker wall thickness, so as to increase the compression sealing area and improve the sealing effect. However, the present invention does not make any limitation to this. In other embodiments, the external thread can also be directly formed on the outer wall of the branch pipe, and the flat-bottomed screw cap can also be an integral structure and its inner wall is directly threaded. In other embodiments, in order to further improve the sealing effect, a branch pipe bushing may be placed inside the branch pipe to increase the compression sealing area at the front end of the branch pipe; and the branch pipe bushing may be formed by straight seam welding of two semicircular parts.

[0064] Although this embodiment takes the branch pipe 21 with external threads as an example to illustrate a pair of locking thread pairs, the present invention does not make any limitation to this. Fig.14 and Fig.15As shown, a branch pipe step 212 for placing a seal is formed on the branch pipe 21, and a pair of locking thread pairs refers to an internal thread 211' located on the branch pipe 21 and a locking screw 22' matched with the internal thread 211'; the branch pipe step 212 and the front end surface of the locking screw 22' are used together as a sealing surface to compress the seal 4. Similarly, in this structure, the locking screw 22' can be a split structure, which includes a screw body 221', a threaded bushing 222' sleeved on the screw body 221', and a screw bushing 223' sleeved on the screw body 221', and the threaded bushing 222' has an external thread. The split screw bushing 223' and the threaded bushing 222' allow the screw body 221' to be processed with stainless steel material with a thinner wall thickness to reduce material costs. In addition, the provision of the screw bushing 223' also increases the compression area of ​​the seal 4 and improves the sealing effect, and it can be formed by two semicircular parts through straight seam welding, which is very convenient to process. Similarly, the branch pipe assembly 2 also includes a branch pipe threaded sleeve 23 that is internally sleeved on the end of the branch pipe 21, and the branch pipe threaded sleeve 23 has an internal thread 211'. However, the present invention does not impose any limitation on this. In other embodiments, the internal thread can also be directly formed on the inner wall of the branch pipe, and the locking screw can also be an integral structure, and the external thread is directly turned on its outer wall. In order to further increase the compression sealing area, such as Fig.15 As shown, a seal carrying ring 213 having a width greater than that of the branch pipe step 212 may also be provided on the branch pipe step 212 .

[0065] Although the present embodiment is described by taking the locking member as a pair of locking thread pairs as an example. However, the present invention does not impose any limitation on the specific structure of the locking member. Other detachable structures that can seal and lock the filter assembly in the branch pipe and the tee pipe body are within the protection scope of the present invention. In the embodiment thereof, the locking member can also be a locking pressure plate; the locking pressure plate includes a flat pressure plate and a fastener, and the fastener presses the sealing member placed on the flat pressure plate to the end of the branch pipe to achieve the sealing of the filter assembly.

[0066] The structure of the three-way tube body 11, the structure of the filter assembly 3, the installation position of the filter assembly 3 in the three-way tube body 11, and the sealing structure of the filter assembly 3 by a pair of locking thread pairs at the end of the branch pipe 21, make the water treatment filter provided in this embodiment not only have small filtration pressure loss, large filtration area, high filtration accuracy, but also have the advantages of good sealing, impurity storage and isolation, easy cleaning of impurities and low filter maintenance frequency.

[0067] In practical applications, the water treatment filter 20 needs to be connected to a water treatment system. To facilitate its connection with the system pipeline, a connecting thread is formed on the inlet end or the fluid outlet end of the three-way pipe body 11. Figure 2As shown in FIG. 1 , the tee pipe fitting 1 further includes an interface threaded bushing 12 sleeved on the fluid inlet end of the tee pipe body 11, and the interface threaded bushing 12 has an internal thread. However, the present invention does not limit this in any way. In other embodiments, the interface threaded bushing may also be formed at the body inlet end of the tee pipe body; or, the body inlet end and the fluid outlet end of the tee pipe body are both provided with interface threaded bushings (such as Fig.10 As shown in FIG. 1 , the interface thread bushing may also have an external thread. Alternatively, in other embodiments, the connection thread may also be directly formed on the fluid inlet end pipe wall and / or the fluid outlet end pipe wall of the tee pipe body. Alternatively, the tee pipe fitting also includes a threaded joint welded to the fluid inlet end or the fluid outlet end of the tee pipe body.

[0068] Furthermore, in this embodiment, Figure 2 As shown, the tee pipe assembly 1 also includes a multilateral ring sleeve 13 disposed at the fluid inlet end or the fluid outlet end of the tee pipe body. Specifically, the multilateral ring sleeve 13 can be directly covered on the outer wall of the tee pipe body 1; or, when the tee pipe body assembly includes an interface threaded bushing, the multilateral ring sleeve 13 can also be directly covered on the interface threaded bushing. In this embodiment, the multilateral ring sleeve 13 is a hexagonal ring sleeve, and its structure is as follows: Fig.17 As shown, it can be welded in a split manner to the pipe wall of the tee pipe body, the outer wall of the interface threaded bushing and the outer wall of the threaded joint; it can also be integrally formed with the above-mentioned interface components. Figure 2 As shown, the cross-sectional outer edge of the polygonal ring 13 is hexagonal and it is integrally formed with the interface threaded bushing 12, and the two together form a hexagonal threaded joint. However, the present invention does not make any limitation to this.

[0069] With the continuous development of economy, the types of pollutants that affect water quality standards are diverse. In order to improve the filtering performance of water treatment filters, filter elements can also be set in the filter screen. The filter element can be selected from one or more combinations of PP cotton filter element, activated carbon filter element and hollow fiber ultrafiltration membrane according to the pollutants treated by the water treatment system.

[0070] Correspondingly, this embodiment further provides a fluid component, which includes a flow body 10 and the above-mentioned water treatment filter 20, and the water treatment filter 20 is connected to the input end or the output end of the flow body 10. Specifically, in this embodiment, Fig.18 As shown, the flow body 10 is a bellows, and one end of the bellows is connected to the fluid outlet 112 of the water treatment filter 20. However, the present invention does not make any limitation to this. In other embodiments, the bellows as the flow body can also be connected to the fluid inlet 111 of the water treatment filter 20.

[0071] Although this embodiment uses a bellows as an example to illustrate the application of the water treatment filter provided by the present invention, the present invention does not make any limitation to this. Fig.19 As shown, the flow body 10 may also be a water distributor, which includes a main pipe 101 and multiple branch pipes 102. The fluid outlet 112 of the water treatment filter 20 is connected to the collecting hole on the main pipe 101, and the filtered water is distributed to the multiple main pipes 102 through the main pipe 101. In addition, the flow body may also be any one of a ball valve, a gate valve, a stop valve, a throttle valve, and a butterfly valve.

[0072] Embodiment 2

[0073] This embodiment is basically the same as the first embodiment and its variations, except that: Fig. 20 As shown, the filter assembly 3 is an open semi-cylindrical shape, and the peripheral wall of the grid frame 31 near the fluid outlet side is covered with a curved metal filter cloth to form a filter 32, and the open part of the metal filter cloth forms an impurity storage slot 321 facing the fluid inlet. Similarly, the grid frame 31 extends into the branch pipe through the lowest busbar KK of the inner wall of the three-way pipe body 11, and the mouth fixing frame 313 on the grid frame 31 and the inner wall of the branch pipe will be surrounded to form an impurity storage tank to achieve the precipitation, collection and isolation of filtered impurities from the flow channel. In addition, in other embodiments, the mouth fixing frame of the grid frame can also be set to a hollow structure, and the filtered impurities fall into the locking thread pair locked at the end of the branch pipe through the mouth fixing frame. At this time, the locking thread pair, the mouth fixing frame and the inner wall of the branch pipe will be surrounded to form an impurity storage tank with a larger volume.

[0074] exist Fig. 20 In the embodiment, the mesh frame 31 is still a cylindrical structure surrounded by the front fixing frame 311, the middle fixing ring 312 and the mouth fixing frame 313, but the filter screen 32 is a semi-cylindrical structure. However, the present invention does not make any limitation to this. In other embodiments, the mesh frame 31 may also be a semi-cylindrical structure, such as Fig.21 shown.

[0075] Although the metal filter cloth is arranged on the side of the mesh frame facing the fluid outlet in this embodiment, the present invention does not limit this. In other embodiments, the metal filter cloth can also be arranged on the side of the mesh frame facing the fluid inlet, such as Fig. 22 As shown. An impurity storage slot 321 is formed on one side of the filter 32 near the mouth fixing frame 313. The portion of the mesh frame 31 extending into the branch pipe through the lowest busbar of the inner wall of the three-way pipe body and the inner wall of the branch pipe enclose an impurity storage slot; specifically, the semicircular mouth fixing frame 313 on the mesh frame 31 and the inner wall of the branch pipe enclose an impurity storage slot. The filter assembly also includes a partition 314 arranged opposite to the impurity storage slot, and the partition 314 blocks the impurity storage slot and the fluid outlet; the partition 314 can be a solid partition or a filter-type partition with filter holes.

[0076] Embodiment 3

[0077] This embodiment is basically the same as the first embodiment and its variations, except that the structure of the grid frame 31' is different and the arrangement of the filter screen on the grid frame 31' is also different.

[0078] In this embodiment, if Fig.23 As shown, the grid 31' includes a front-end fixing frame 311' and a first grid frame 312' and a second grid frame 313' in the shape of a semi-cylindrical column. The first grid frame 312' is close to the fluid inlet and has a semi-cylindrical primary filter screen 322' welded to its inner side. The second grid frame 313' is close to the fluid outlet and has a semi-cylindrical secondary filter screen 323' welded to its inner side. The two semi-cylindrical grid frames are spliced ​​relative to each other and straight-seam welded, and then welded to the front-end fixing frame 311' to form a cylindrical grid 31'. Correspondingly, the primary filter screen 322' and the secondary filter screen 323' are also spliced ​​to form a cylindrical filter screen structure.

[0079] In this embodiment, the first grid frame 312' is formed with an impurity storage slot 321 opening toward the fluid inlet, and the grid frame 31' further includes a partition 314, which is disposed on a side of the first grid frame 312' close to the secondary filter screen 323' and opposite to the impurity storage slot 321. The bottom end of the first grid frame 312' extends into the branch pipe, and an impurity storage slot is formed between the partition 314, the first grid frame 312' and the inner wall of the branch pipe, and the partition 314 blocks the direct communication between the secondary filter screen 323' and the impurity storage slot.

[0080] Compared with the first embodiment, in this embodiment, the primary filter screen 322' and the secondary filter screen 323' are both attached to the inner side of the grid frame 31', and the two grid frames respectively support the inner filter screens to improve the strength of the filter screens. In this embodiment, the two semi-cylindrical grid frames are formed by stamping to facilitate grid processing. However, the present invention does not make any limitation to this.

[0081] In this embodiment, the mesh number of the primary filter 322' is smaller than that of the secondary filter 323'. However, the present invention is not limited to this. In other embodiments, the mesh numbers of the primary filter and the secondary filter may be the same. Similarly, in this embodiment, the partition 314 is a filter-type partition with filter holes.

[0082] Although the present embodiment is described by taking the grid frame including two semi-cylindrical grid frames as an example, the present invention does not make any limitation to this. In other embodiments, the grid frame may also include only one semi-cylindrical grid frame, and the filter screen is a curved filter screen attached to the inner side of the semi-cylindrical grid frame.

[0083] In summary, in the water treatment filter and fluid assembly provided by the present invention, the filter assembly is accommodated in the inner cavity formed by the filter abutment surface in the three-way pipe body. During filtration, the fluid passes through the filter along the axial direction of the three-way pipe body without changing the flow direction to greatly reduce the fluid pressure drop loss; and the integrated inner cavity structure also makes the installation of the filter assembly have the advantages of simple structure, less process pollution, fewer welding points and good sealing. The setting of the filter abutment surface on the inner cavity, which is roughly flat, enables the insertion front end of the filter assembly to fit well on the filter abutment surface after assembly, which is not only stable in assembly but also does not have a flow gap between the two, thereby greatly improving the filtration performance. Further, in the water treatment filter provided by the present invention, the rear end of the grid extends into the branch pipe and the filter has an impurity storage slot opening facing the fluid inlet. This setting enables the grid and the inner wall of the branch pipe to enclose an external impurity storage slot located at the flow section of the flow channel. The impurities entering the impurity storage slot after filtration are isolated from the flow channel in the three-way pipe body, and the impurities will no longer follow the fluid to continuously flow back on the inlet side and block the filter. In addition, the columnar filter assembly also makes the impurity storage tank present a large-capacity semi-columnar shape, which effectively reduces the cleaning frequency of the filter and greatly facilitates the maintenance of the filter assembly.

[0084] Although the present invention has been disclosed as above by the preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection required by the claims.

Claims

1. A water treatment filter, characterized in that: include: A tee pipe assembly, comprising a tee pipe body, the tee pipe body having a substantially coaxial fluid inlet and fluid outlet and a branch pipe opening whose axis is substantially perpendicular to the axis of the fluid inlet, a substantially planar filter abutment surface formed on the inner wall of the tee pipe body opposite to the branch pipe opening, and an inner cavity body for accommodating the filter assembly formed by the filter abutment surface, the inner cavity body being a cylindrical inner cavity with the filter abutment surface as the bottom surface and the pipe wall near the filter abutment surface protruding outward, and a flow area at the inner cavity body being larger than a flow area at the fluid inlet of the tee pipe body; A branch pipe assembly, comprising a branch pipe welded to a branch pipe opening and a locking member arranged at an end of the branch pipe away from the branch pipe opening; A columnar filter assembly comprises a mesh frame and a filter in a cylindrical or curved shape arranged on the mesh frame, wherein the filter assembly extends into the inner cavity of the tee tube body along the branch pipe, the plane of the front end surface of the mesh frame is in contact with the filter abutment surface, and the busbars on both sides of the filter are in contact with the inner wall of the inner cavity, and there is no gap between the filter and the inner cavity that directly connects the fluid inlet and the fluid outlet, and the projection of the filter in the fluid direction completely covers the flow section of the flow channel; the rear end of the mesh frame extends into the branch pipe through the lowest busbar of the inner wall of the tee tube body, and the filter is provided with an impurity storage slot opening with an opening toward the fluid inlet, and an impurity storage slot located outside the flow section of the flow channel and opening toward the fluid inlet is formed between the mesh frame at the impurity storage slot and the inner wall of the branch pipe, and the lowest busbar of the inner wall refers to the busbar of the inner wall of the tee tube passing through the largest cross-section of the tee tube body and close to the side of the branch pipe; the locking piece on the branch pipe assembly seals and locks the filter assembly in the branch pipe and the tee tube body; Wherein, the filter assembly is cylindrical, and the filter is integrally arranged circumferentially around a mesh frame with a circular cross-section; or, the filter assembly is an open semi-cylindrical shape, and the peripheral wall of the mesh frame close to the fluid outlet side is covered with a curved metal filter cloth.

2. The water treatment filter according to claim 1, characterized in that: Another impurity storage groove is formed between the inner cavity of the filter located in the branch pipe and the locking piece on the branch pipe assembly; the locking piece includes a pair of locking thread pairs, and the pair of locking thread pairs seals and locks the filter assembly in the branch pipe and the three-way pipe body by pressing the sealing surface against the sealing piece.

3. The water treatment filter according to claim 1, characterized in that: The filter screen is a cylindrical filter screen with uniform mesh size; Alternatively, the filter screen includes a semi-cylindrical primary filter screen located on the fluid inlet side and a semi-cylindrical secondary filter screen located on the fluid outlet side, the impurity storage slot is formed on the side where the primary filter screen is located and the mesh number of the primary filter screen is smaller than the mesh number of the secondary filter screen.

4. The water treatment filter according to claim 1, characterized in that: When the filter assembly is in an open semi-cylindrical shape, the open portion of the metal filter cloth forms an impurity storage slot facing the fluid inlet.

5. The water treatment filter according to claim 1, characterized in that: The filter screen abutting surface is protruding toward the outside of the tee body, and the filter screen abutting surface is higher than the highest busbar of the tee body; or, the filter screen abutting bottom surface is roughly flush with the highest busbar of the inner wall of the tee body, and the highest busbar of the inner wall refers to the busbar of the inner wall of the tee that passes through the largest cross-section of the inner part of the tee body and is opposite to the lowest busbar of the inner wall.

6. The water treatment filter according to claim 2, characterized in that: The branch pipe is formed with a branch pipe step for placing a seal, and the locking thread pair comprises an internal thread on the branch pipe and a locking screw matched with the internal thread, and the front end surface of the locking screw presses the seal; Alternatively, the locking thread pair comprises an external thread on the branch pipe and a flat-bottom screw cover matching the external thread, and the sealing member is arranged on the bottom surface of the flat-bottom screw cover and is pressed against the end of the branch pipe.

7. The water treatment filter according to claim 6, characterized in that: The locking screw or the flat-bottomed nut cover is provided with a multi-sided screwing portion.

8. The water treatment filter according to claim 1, characterized in that: An anti-mistake portion is formed on the filter screen abutting surface, and an anti-mistake groove whose shape matches the anti-mistake portion is formed on the extended front end surface of the filter screen assembly.

9. The water treatment filter according to claim 1, characterized in that: A connecting thread is formed on the fluid inlet end or the fluid outlet end of the three-way pipe body; The connecting thread is directly formed on the fluid inlet end tube wall or the fluid outlet end tube wall of the three-way tube body; Alternatively, the three-way pipe body further comprises an interface threaded bushing sleeved on the fluid inlet end or the fluid outlet end of the three-way pipe body, and the interface threaded bushing has an internal thread or an external thread; Alternatively, the three-way pipe body further comprises a threaded joint welded to the fluid inlet end or the fluid outlet end of the three-way pipe body, and the threaded joint is formed with an internal thread or an external thread.

10. The water treatment filter according to claim 9, characterized in that: The three-way pipe assembly also includes a polygonal ring sleeve arranged at the fluid inlet end or the fluid outlet end of the three-way pipe body.

11. The water treatment filter according to claim 1, characterized in that: The water treatment filter also includes a filter element arranged in the filter screen, and the filter element is one or more combinations of a PP cotton filter element, an activated carbon filter element and a hollow fiber ultrafiltration membrane.

12. The water treatment filter according to claim 1, characterized in that: The grid is a frame structure; The mesh frame includes a front fixing frame, a middle fixing ring and a mouth fixing frame which are sequentially distributed along the axial direction of the filter assembly and used to support and fix the filter, and the front end surface of the front fixing frame abuts against the filter abutting surface on the three-way pipe body; Alternatively, the grid comprises a front end fixing frame and two semi-cylindrical grid frames, the two semi-cylindrical grid frames are connected to the front end fixing frame after being spliced ​​and welded relative to each other, and the front end surface of the front end fixing frame abuts against the filter abutment surface on the three-way pipe body.

13. A fluid component, characterized in that: include: Current subject; The water treatment filter according to any one of claims 1 to 12 is connected to the input end or the output end of the flow body.

14. The fluid assembly according to claim 13, characterized in that The flow-through body is any one of a water distributor, a bellows, a ball valve, a gate valve, a stop valve, a throttle valve and a butterfly valve.

Images