A high sealing polytetrafluoroethylene filter cartridge

Abstract

The application discloses a high-sealing polytetrafluoroethylene filter element and relates to the field of filter elements.The high-sealing polytetrafluoroethylene filter element comprises a supporting framework one, a supporting framework two is fixed to the inner wall of the supporting framework one, a connecting pipe is fixed to one end of the supporting framework one, an end head is arranged at the end of the supporting framework one away from the connecting pipe, a stable abutting mechanism is arranged between the supporting framework one and the end head, and a reinforcing mechanism is arranged at the end of the supporting framework one close to the connecting pipe.The end head of the supporting framework one abuts against the bottom of the shell to complete the installation of the filter element;when the end head abuts against the bottom of the shell, the shell extrudes the end head, the end head extrudes the stable abutting mechanism, the stable abutting mechanism abuts against the inner wall of the shell, the stability of the supporting framework one is improved, the supporting framework one is prevented from deviating due to excessive water pressure, the connecting pipe on the supporting framework one is prevented from deviating at the connecting position, and the possibility that water flow enters the shell without being filtered is reduced.

Description

Technical Field

[0001] This application relates to the field of filter cartridges, and in particular to a high-sealing polytetrafluoroethylene filter cartridge. Background Technology

[0002] PFA pleated filter cartridges are made of PFA plastic, which is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. It has high filtration accuracy, stable chemical properties, and is resistant to acids and alkalis, corrosion, high temperatures, and oxidation. Compared with PTFE, PFA is easier to process and can melt and flow above its melting point, in addition to basically retaining the various properties of polytetrafluoroethylene (Teflon).

[0003] The existing high-sealing PTFE filter cartridge consists of inner and outer support frames, a high-sealing PTFE filter membrane, and a woven mesh. It is generally used in water filtration. In daily use, it needs to be used with an outer shell to form a filtration device. The outer frame of the filter cartridge usually has a connecting pipe fixed on it, while the outer shell is divided into two parts. One part connects directly to the water pipe, and the other part is combined with the outer shell on the water pipe to wrap the filter cartridge. When installing the filter cartridge, first, the connecting pipe on the outer support frame is sleeved onto the connecting pipe on the outer shell connected to the water pipe. The fixing method is usually plug-in fixing. Then, a sealing ring is used to improve the connection sealing. After the connecting pipe is fixed, the other part of the outer shell is sleeved onto the outer support frame of the filter cartridge, and then the two parts of the outer shell are fixed together. When water flows through, the water enters from the inner support frame, is filtered by the filter membrane, then enters the outer shell from the outer support frame, and then re-enters the water pipe from the outer shell.

[0004] In actual use, when the pressure in the water pipe is too high, when the water flows into the inner support frame, the water flow will impact the support frame and the connecting pipe because the filter membrane has a fixed filtration flow rate. The part where the connecting pipe is connected to the outer shell is only fixed by a snap-fit. Under the impact of the water flow, the connection point of the filter element connecting pipe and the connection point of the outer shell may shift, causing the water to directly enter the outer shell, thus directly affecting the filtration quality of the filter element. Utility Model Content

[0005] The purpose of this application is to address the problem mentioned in the background art: when the pressure in the water pipe is too high, the water flow impacts the support frame and connecting pipe when it enters the inner support frame. Since the filter membrane filtration flow rate is fixed, the water flow will impact the support frame and connecting pipe. The connection between the connecting pipe and the outer shell is only fixed by a snap-fit. Under the impact of the water flow, the connection between the filter element connecting pipe and the outer shell may shift, causing the water flow to directly enter the outer shell, thus directly affecting the filtration quality of the filter element. This application provides a high-sealing polytetrafluoroethylene filter element.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] A high-sealing polytetrafluoroethylene (PTFE) filter element includes a first support frame, a second support frame fixed to the inner wall of the first support frame, a first woven mesh fixed between the first and second support frames, a filter membrane fixed between the first woven mesh and the second support frame, a second woven mesh fixed between the filter membrane and the second support frame, a connecting tube fixed to one end of the first support frame, an end cap provided at the end of the first support frame away from the connecting tube, a stabilizing contact mechanism provided between the first support frame and the end cap, and a reinforcing mechanism provided at the end of the first support frame near the connecting tube.

[0008] By adopting the above technical solution, the reinforcing mechanism abuts against the outer wall of the pipe used for connecting the outer shell, further reinforcing the connecting pipe. Then, the remaining outer shell is fitted onto the support frame one, with the end of the support frame one abutting against the bottom of the outer shell, completing the installation of the filter element. When the end abuts against the bottom of the outer shell, the outer shell squeezes the end, and the end squeezes the stabilizing abutting mechanism, causing the stabilizing abutting mechanism to abut against the inner wall of the outer shell. This improves the stability of the support frame one and reduces the possibility that the support frame one may shift due to excessive water pressure, causing the connection of the connecting pipe on the support frame one to shift, resulting in water flowing into the outer shell without being filtered, thus affecting the filtration quality.

[0009] Furthermore, the stabilizing contact mechanism includes a support ring fixed on a support frame, a plurality of circumferentially distributed contact rods are provided on the support ring, a rubber head is fixed to one end of each contact rod, a support column is slidably connected to the support ring, the support column is fixedly connected to the end, and a pushing component is provided between the support column and the contact rod.

[0010] By adopting the above technical solution, the end-squeezing and pushing component causes the pushing component to drive the contact rod to extend from the support ring and contact the outer shell used to fit the filter element. This can further improve the stability of the support frame and reduce the possibility that the support frame will shift due to excessive water pressure, causing the connection of the connecting pipe on the support frame to shift, resulting in water flowing into the outer shell without being filtered.

[0011] Furthermore, the pushing assembly includes a pushing disk fixed to the end of the support column away from the end head, a pushing rod threadedly connected to the abutment rod, the pushing rod being slidably connected to the support ring, and a pushing inclined surface being provided at the end of the pushing rod near the pushing disk.

[0012] By adopting the above technical solution, the pushing disc squeezes the pushing inclined surface on the pushing rod, thereby making it easy for the pushing rod to drive the abutment rod to extend out of the support ring.

[0013] Furthermore, a limiting rod is fixed on the push rod, and the limiting rod is slidably connected to the support ring.

[0014] By adopting the above technical solution, the push rod drives the limit rod when it slides on the support ring, thereby reducing the possibility of the push rod rotating when it slides.

[0015] Furthermore, a return spring is provided inside the support ring, and both ends of the return spring are fixedly connected to the support frame and the push plate.

[0016] By adopting the above technical solution, a pair of push plates are supported by a reset spring, which makes it easy to reset the push plate when the filter element is removed.

[0017] Furthermore, a reset block is fixed to the end of the limiting rod away from the contact rod, and a reset spring is provided between the reset block and the inner wall of the support ring. Both ends of the reset spring are fixedly connected to the support ring and the reset block.

[0018] By adopting the above technical solution, the second return spring supports the push rod, thereby making it easy for the push rod to retract into the support ring.

[0019] Furthermore, the reinforcement mechanism includes a reinforcement threaded ring disposed on one end of the support frame, and a plurality of circumferentially distributed reinforcement blocks are disposed inside the reinforcement threaded ring. The reinforcement threaded ring is threadedly connected to the plurality of reinforcement blocks. One end of the reinforcement block is fixedly connected to the support frame, and a limit block is fixed at the end of the reinforcement block away from the support frame.

[0020] By adopting the above technical solution, rotating the reinforcing threaded ring allows the reinforcing block to abut against the outer wall of the pipe used for connecting to the connecting pipe on the outer shell, thereby further improving the stability of the connecting pipe connection and further reducing the possibility of the support frame shifting.

[0021] Furthermore, the inner wall of the reinforcing block is fixed with an abutment pad.

[0022] By adopting the above technical solution, when the reinforcing block moves, it drives the contact pad to move, thereby improving the stability of the reinforcing block against the pipeline.

[0023] In summary, this application includes at least one of the following beneficial effects;

[0024] 1. In this application, when the outer shell is fitted onto the support frame, the outer shell completely covers the support frame. While fixing the outer shell, the end abuts against the outer shell. The outer shell presses against the end, and the end pushes the support column, causing the support column to drive the push plate to slide in the support ring. Then, the push plate presses against the pushing slope of the push rod. Under the action of the pushing slope, the push rod moves towards the outer shell under the restriction of the limiting rod, so that the abutting rod abuts against the inner wall of the outer shell. The abutting rod and the push rod provide limiting support for the support ring, and the support ring provides further support for the support frame. This achieves the purpose of improving the stability of the support frame and reducing the possibility of the support frame shifting due to excessive water pressure, which could cause the connection of the connecting pipe on the support frame to shift, resulting in water flowing into the outer shell without filtration and affecting the filtration quality.

[0025] 2. In this application, after connecting the connecting pipe on the support frame to the outer shell connected to the water pipe, the reinforcing threaded ring is rotated to move the reinforcing threaded ring on several reinforcing blocks, so that the several reinforcing blocks move closer to each other, and the abutment pads on the reinforcing blocks are pressed against the outer wall of the pipe inside the outer shell connected to the connecting pipe. This achieves the purpose of further improving the stability of the connecting pipe connection and further reducing the possibility of the support frame shifting. Attached Figure Description

[0026] Figure 1 This is a first three-dimensional structural schematic diagram of the filter element in this application;

[0027] Figure 2 This is a schematic diagram of the internal structure of the filter element in this application;

[0028] Figure 3 This application Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This application Figure 2 Enlarged view of point B in the middle;

[0030] Figure 5 This is a partial structural diagram of the driving component in this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Support frame one; 2. Woven mesh one; 3. Filter membrane; 4. Woven mesh two; 5. Connecting pipe; 6. End; 7. Stabilizing contact mechanism; 71. Contact rod; 72. Support ring; 73. Support column; 74. Pushing assembly; 741. Pushing disc; 742. Pushing rod; 743. Pushing inclined plane; 744. Limiting rod; 745. Return spring one; 746. Return block; 747. Return spring two; 8. Reinforcing mechanism; 81. Reinforcing block; 82. Reinforcing threaded ring; 83. Limiting block; 84. Contact pad; 9. Support frame two. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 —5 provides further details regarding this application.

[0034] This application discloses a high-sealing polytetrafluoroethylene filter element.

[0035] Reference Figure 1 , Figure 2 and Figure 3 A high-sealing polytetrafluoroethylene filter element includes a support frame 1, a support frame 2 9 fixed to the inner wall of the support frame 1, a woven mesh 2 fixed between the support frame 1 and the support frame 2 9, a filter membrane 3 fixed between the woven mesh 2 and the support frame 2 9, a woven mesh 2 4 fixed between the filter membrane 3 and the support frame 2 9, a connecting pipe 5 fixed to one end of the support frame 1, an end cap 6 provided at the end of the support frame 1 away from the connecting pipe 5, a stabilizing contact mechanism 7 provided between the support frame 1 and the end cap 6, and a reinforcing mechanism 8 provided at the end of the support frame 1 near the connecting pipe 5.

[0036] This filter element is generally used in conjunction with a housing. In daily use, a portion of the housing is connected to the water pipe. Then, the connecting pipe 5 on the support frame 1 is clamped together with the connecting pipe sleeve in the housing connected to the water pipe. The connecting pipe 5 supports the support frame 1, while the reinforcing mechanism 8 abuts against the outer wall of the connecting pipe in the housing, further reinforcing the connecting pipe 5. The remaining housing is then fitted onto the support frame 1, with the end 6 of the support frame 1 abutting against the bottom of the housing, completing the filter element installation. When the end 6 abuts against the bottom of the housing, the housing presses against the end 6, which in turn presses against the stabilizing contact mechanism 7, causing the stabilizing contact mechanism 7 to abut against the inner wall of the housing, further securing the support frame 1. When water flows through the pipe, water enters the support frame 9 from the connecting pipe 5. The water is filtered sequentially by the woven mesh 2, filter membrane 3, and woven mesh 2, then flows from the support frame 1 into the outer shell, and then flows again from the outer shell into the water pipe, completing the filtration operation. When the water pressure is high, the stabilizing contact mechanism 7 supports the support frame 1, reducing the possibility of the support frame 1 shifting due to excessive water pressure. At the same time, the reinforcing mechanism 8 further assists in the connection of the connecting pipe 5. By setting the stabilizing contact mechanism 7 on the support frame 1, when the outer shell is fitted onto the support frame 1, the stabilizing contact mechanism 7 abuts against the inner wall of the outer shell, thereby improving the stability of the support frame 1 and reducing the possibility of the support frame 1 shifting due to excessive water pressure, which could cause the connection of the connecting pipe 5 on the support frame 1 to shift, resulting in water flowing into the outer shell without being filtered, thus affecting the filtration quality.

[0037] Reference Figure 2 , Figure 3 and Figure 5 The stabilizing contact mechanism 7 includes a support ring 72 fixed on the support frame 1. The support ring 72 is provided with a plurality of circumferentially distributed contact rods 71. One end of each contact rod 71 is fixed with a rubber head. A support column 73 is slidably connected to the support ring 72. The support column 73 is fixedly connected to the end 6. A pushing component 74 is provided between the support column 73 and the contact rods 71.

[0038] In addition, the pushing assembly 74 includes a pushing disk 741 fixed to the end of the support column 73 away from the end 6, a pushing rod 742 threadedly connected to the abutment rod 71, the pushing rod 742 being slidably connected to the support ring 72, and a pushing inclined surface 743 being provided at the end of the pushing rod 742 near the pushing disk 741.

[0039] Furthermore, a limit rod 744 is fixed on the push rod 742, and the limit rod 744 is slidably connected to the support ring 72.

[0040] When the outer shell is fitted onto the support frame 1, the outer shell completely encloses the support frame 1. Simultaneously, the end 6 abuts against the outer shell, pressing against it. The outer shell presses against the end 6, which in turn pushes the support column 73, causing the support column 73 to drive the push plate 741 to slide within the support ring 72. Then, the push plate 741 presses against the pushing ramp 743 of the push rod 742. Under the action of the pushing ramp 743, the push rod 742 moves towards the outer shell under the restriction of the limiting rod 744, causing the contact rod 71 to abut against the inner wall of the outer shell. The contact rod 71 and the push rod 742 provide limiting support for the support ring 72, which in turn supports the support frame 1. For further support, when the inner diameter of the outer shell is different, the abutment rod 71 can be rotated to move on the push rod 742, allowing the extension length of the abutment rod 71 to be adjusted. When the outer shell is fitted onto the support frame 1, the push rod 742, driven by the outer shell, causes the abutment rod 71 to extend from the support ring 72 and abut against the inner wall of the outer shell. This further improves the stability of the support frame 1 and reduces the possibility of the support frame 1 shifting due to excessive water pressure, causing the connection of the connecting pipe 5 on the support frame 1 to shift, resulting in water entering the outer shell without filtration.

[0041] Reference Figure 3 and Figure 5 A return spring 745 is provided inside the support ring 72. Both ends of the return spring 745 are fixedly connected to the support frame 1 and the push plate 741.

[0042] In addition, a reset block 746 is fixed to the end of the limiting rod 744 away from the contact rod 71. A reset spring 747 is provided between the reset block 746 and the inner wall of the support ring 72. Both ends of the reset spring 747 are fixedly connected to the support ring 72 and the reset block 746.

[0043] When the outer casing pushes end 6, end 6 pushes support column 73. Support column 73 drives push plate 741 to squeeze reset spring 1 745. At the same time, when push rod 742 drives contact rod 71 to extend from support column 73, push rod 742 drives reset block 746 on limit rod 744 to squeeze reset spring 1 745. When the outer casing is removed, push plate 741 is reset by the push of reset spring 1 745. At the same time, push rod 742 drives contact rod 71 to retract into support ring 72 by the push of reset spring 2 747. Then the outer casing is removed. By using reset spring 1 745 to support push plate 741 and reset spring 2 747 to support push rod 742, contact rod 71 can be easily separated from outer casing. Then the outer casing can be removed from support frame 1 for easy replacement of new filter element body.

[0044] Reference Figure 1 , Figure 2 and Figure 4 The reinforcement mechanism 8 includes a reinforcement threaded ring 82 disposed on one end of the support frame 1. The reinforcement threaded ring 82 is provided with a plurality of circumferentially distributed reinforcement blocks 81. The reinforcement threaded ring 82 is threadedly connected to the plurality of reinforcement blocks 81. One end of the reinforcement block 81 is fixedly connected to the support frame 1, and a limit block 83 is fixedly fixed at the end of the reinforcement block 81 away from the support frame 1.

[0045] In addition, the inner wall of the reinforcing block 81 is fixed with an abutment pad 84.

[0046] After connecting the connecting pipe 5 on the support frame 1 to the outer shell connected to the water pipe, rotate the reinforcing threaded ring 82 to move it on several reinforcing blocks 81. The reinforcing blocks 81 form a circle and open outwards. The reinforcing blocks 81 are made of flexible plastic. Under the movement restriction of the reinforcing threaded ring 82, the reinforcing blocks 81 move closer to each other, and the abutment pads 84 on the reinforcing blocks 81 press against the outer wall of the pipe inside the outer shell connected to the connecting pipe 5. When rotating the reinforcing threaded ring 82, the limiting block 83 on the reinforcing block 81 limits the reinforcing block 81, reducing the possibility of the reinforcing threaded ring 82 disengaging from the reinforcing block 81. By locking the connecting pipe 5 on the support frame 1 to the pipe sleeve used for connecting the outer shell, and using the reinforcing blocks 81 to abut against the outer wall of the pipe used for connecting the outer shell, the stability of the connection of the connecting pipe 5 can be further improved, and the possibility of the support frame 1 shifting can be further reduced.

[0047] Working principle: When using this filter element, firstly, connect a portion of the outer shell to the water pipe. Then, connect the connecting pipe 5 on the support frame 1 to the connecting pipe sleeve in the outer shell connected to the water pipe. The connecting pipe 5 supports the support frame 1. Then, rotate the reinforcing threaded ring 82, allowing it to move on several reinforcing blocks 81, bringing the blocks closer together. This causes the contact pads 84 on the reinforcing blocks 81 to press against the outer wall of the pipe inside the outer shell connected to the connecting pipe 5, further reinforcing the connection of the connecting pipe 5. Then, place the remaining outer shell onto the support frame 1, completely enclosing it. While fixing the outer shell, the end 6 abuts against the outer shell. The outer shell squeezes the end 6, which pushes the support column 73, causing the support column 73 to drive the push plate 741 to slide in the support ring 72. Then, the push plate 741 squeezes the push slope 743 of the push rod 742. Under the action of the push slope 743, the push rod 742 moves towards the outer shell under the restriction of the limit rod 744, causing the abutment rod 71 to abut against the inner wall of the outer shell. The abutment rod 71 and the push rod 742 provide limit support for the support ring 72, and the support ring 72 provides further support for the support frame 1. Then, water is introduced, and the water flows into the support frame 2 9. After passing through the woven mesh 2 4, the filter membrane 3, and the woven mesh 2, the water enters the outer shell from the support frame 1 and then enters the water pipe from the outer shell.

Claims

1. A high-sealing polytetrafluoroethylene filter element, comprising a support frame (1), characterized in that: A second support frame (9) is fixed to the inner wall of the first support frame (1). A woven mesh (2) is fixed between the first support frame (1) and the second support frame (9). A filter membrane (3) is fixed between the first woven mesh (2) and the second support frame (9). A woven mesh (4) is fixed between the filter membrane (3) and the second support frame (9). A connecting pipe (5) is fixed to one end of the first support frame (1). An end (6) is provided at the end of the first support frame (1) away from the connecting pipe (5). A stabilizing contact mechanism (7) is provided between the first support frame (1) and the end (6). A reinforcing mechanism (8) is provided at the end of the first support frame (1) close to the connecting pipe (5).

2. The high-sealing polytetrafluoroethylene filter element according to claim 1, characterized in that: The stabilizing contact mechanism (7) includes a support ring (72) fixed on a support frame (1). The support ring (72) is provided with a plurality of circumferentially distributed contact rods (71). One end of each contact rod (71) is fixed with a rubber head. A support column (73) is slidably connected to the support ring (72). The support column (73) is fixedly connected to the end (6). A pushing component (74) is provided between the support column (73) and the contact rod (71).

3. The high-sealing polytetrafluoroethylene filter element according to claim 2, characterized in that: The pushing assembly (74) includes a pushing disk (741) fixed to the end of the support column (73) away from the end (6), a pushing rod (742) is threaded onto the abutting rod (71), the pushing rod (742) is slidably connected to the support ring (72), and a pushing inclined surface (743) is provided at the end of the pushing rod (742) near the pushing disk (741).

4. The high-sealing polytetrafluoroethylene filter element according to claim 3, characterized in that: A limiting rod (744) is fixed on the push rod (742), and the limiting rod (744) is slidably connected to the support ring (72).

5. A high-sealing polytetrafluoroethylene filter element according to claim 4, characterized in that: The support ring (72) is provided with a reset spring (745), and both ends of the reset spring (745) are fixedly connected to the support frame (1) and the push plate (741).

6. The high-sealing polytetrafluoroethylene filter element according to claim 5, characterized in that: The end of the limiting rod (744) away from the contact rod (71) is fixed with a reset block (746). A reset spring (747) is provided between the reset block (746) and the inner wall of the support ring (72). Both ends of the reset spring (747) are fixedly connected to the support ring (72) and the reset block (746).

7. The high-sealing polytetrafluoroethylene filter element according to claim 1, characterized in that: The reinforcement mechanism (8) includes a reinforcement threaded ring (82) disposed on one end of the support frame (1). The reinforcement threaded ring (82) contains a plurality of circumferentially distributed reinforcement blocks (81). The reinforcement threaded ring (82) is threadedly connected to the plurality of reinforcement blocks (81). One end of the reinforcement block (81) is fixedly connected to the support frame (1). A limit block (83) is fixed at the end of the reinforcement block (81) away from the support frame (1).

8. A high-sealing polytetrafluoroethylene filter element according to claim 7, characterized in that: The inner wall of the reinforcing block (81) is fixed with an abutment pad (84).

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