Corrosion-resistant filter capable of being purged on line

Abstract

The invention provides an on-line purging corrosion-resistant filter. The on-line purging corrosion-resistant filter comprises a metal cylinder, an inflation head mounted at the top of the metal cylinder, a quick-mounting chuck mounted at the bottom of the metal cylinder, and a filter element and a co-extrusion soft bag which are positioned in the metal cylinder, the co-extrusion soft bag is coated outside the filter element, and the filter element comprises an upper end cover, a lower end cover, an inner framework and a filter layer coated outside the inner framework. According to the corrosion-resistant filter capable of achieving online purging, compressed gas is inflated into the co-extrusion soft bag through the inflation head, filtrate can be completely extruded out, the utilization rate of the filtrate is increased, waste is avoided, and the cost is reduced; through isolation of the co-extrusion soft bag, the metal barrel can be prevented from being in contact with filtrate, corrosion is avoided, and the service life is long; in addition, the interior of the metal barrel is integrally replaced, use is convenient, a connector is simple, replacement is rapid, during replacement, filtrate is free of leakage and dripping, pollution to the production environment is avoided, residual filtrate does not need to be cleaned, and safety is high.

Description

Technical Field

[0001] The invention relates to the technical field of filters, and in particular to a corrosion-resistant filter capable of being purged online. Background Art

[0002] In the fields of lithium battery slurry filtration, magnetic slurry filtration, paint and ink filtration, digital imaging coating slurry material filtration, etc., the existing filters have the problem that the upstream filter medium is retained in the shell and cannot be used, resulting in waste. Especially for some high-value slurries, the cost expenditure is seriously increased. For the remaining slurry, the leakage of slurry when replacing the filter will pollute the production environment. In addition, in corrosive media, the existing filters contain metal materials. If they are in direct contact with the corrosive media, the filters will fail. Summary of the invention

[0003] The purpose of the present invention is to disclose a corrosion-resistant filter that can be purged online. Compressed gas is injected into a co-extruded soft bag through an inflation head, so that all the filtrate can be squeezed out, thereby improving the utilization rate of the filtrate, avoiding waste, and reducing costs; through the isolation of the co-extruded soft bag, the metal cylinder can avoid contact with the filtrate, will not be corroded, and has a long service life; in addition, the interior of the metal cylinder is replaced as a whole, which is easy to use, has a simple interface, and is quick to replace. When replacing, there is zero leakage and zero dripping of the filtrate, and it will not cause pollution to the production environment. There is no need to clean the residual filtrate, and it is highly safe.

[0004] To achieve the above-mentioned objectives, the present invention provides an online-purgeable corrosion-resistant filter, comprising a metal cylinder, an inflation head installed on the top of the metal cylinder, a quick-release chuck installed on the bottom of the metal cylinder, a filter element and a co-extruded soft bag located inside the metal cylinder; the co-extruded soft bag is coated on the outside of the filter element, and the filter element comprises an upper end cover, a lower end cover, an inner skeleton located between the upper end cover and the lower end cover, and a filter layer coated on the outside of the inner skeleton; it also includes a bottom end cover connected to the lower end cover, the bottom end cover is formed with a liquid inlet and a liquid outlet, a liquid inlet check valve is provided in the liquid inlet, and a liquid outlet control valve is provided in the liquid outlet; the quick-release chuck is provided with a liquid inlet channel connected to the liquid inlet and a liquid outlet channel connected to the liquid outlet.

[0005] In some embodiments, the inflation head includes a one-way valve seat, a threaded through-hole connected to the one-way valve seat, an inflation hose inserted in the threaded through-hole, a valve head and a bottom valve located in the one-way valve seat, and a reset spring; one end of the reset spring is connected to the bottom valve, and the other end of the reset spring is connected to the valve head. A guide cylinder is formed on the bottom valve, one end of the valve head slides in the guide cylinder, and the other end of the valve head fits into and closes the threaded through-hole under the action of the reset spring, and an air inlet hole is provided on the bottom valve.

[0006] In some embodiments, the top of the co-extruded soft bag is connected to the one-way valve seat, the bottom of the co-extruded soft bag is connected to the bottom end cover, and the connecting surface between the bottom of the co-extruded soft bag and the bottom end cover has a draft angle of 5 to 10 degrees.

[0007] In some embodiments, the co-extruded soft bag includes an inner layer and an outer layer, the inner layer is a welding layer made of HDPE or PP material, and the outer layer is a nylon reinforcement layer.

[0008] In some embodiments, the liquid inlet one-way valve includes a plastic spring head and a plastic plugging piece, the plastic spring head includes a main body and a corrugated tube body connected to the main body, the plastic plugging piece includes a pressure plate and a rod body, the pressure plate covers the liquid inlet, a limit platform connected to the bottom end cover is provided in the liquid inlet, the top of the plastic spring head is attached to the limit platform, and the rod body passes through the limit platform and is connected to the plastic spring head.

[0009] In some embodiments, the rod and the main body are threadedly connected.

[0010] In some embodiments, the liquid outlet control valve includes a plastic spring body abutting against the lower end cover, a liquid outlet plug abutting against the plastic spring body, and a ejector pin abutting against the liquid outlet plug; the plastic spring body is hollow, and the liquid outlet plug fits against the bottom end cover.

[0011] In some embodiments, the plastic spring body is formed by connecting a plurality of corrugated pipe segments, the corrugated pipe segments are provided with a plurality of openings, and the area of ​​the openings is half of the circumferential area of ​​the corrugated pipe segments.

[0012] In some embodiments, the thickness of the plastic spring body is 1.5-2 mm, and the angle between adjacent corrugated tube sections is 45°-60°.

[0013] In some embodiments, the ejector pin is located in the liquid outlet channel.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the corrosion-resistant filter that can be purged online provided by the present invention can completely squeeze out the filtrate by flushing compressed gas into the co-extruded soft bag through the inflation head, thereby improving the utilization rate of the filtrate, avoiding waste, and reducing costs; through the isolation of the co-extruded soft bag, the metal cylinder can avoid contact with the filtrate, will not be corroded, and has a long service life; in addition, the interior of the metal cylinder is replaced as a whole, which is easy to use, has a simple interface, and is quick to replace. During replacement, there is zero leakage and zero dripping of the filtrate, which will not cause pollution to the production environment, and there is no need to clean the residual filtrate, which is highly safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an appearance diagram of an online purgable corrosion-resistant filter shown in the present invention;

[0016] Figure 2 This is an internal structure diagram of an online purgable corrosion-resistant filter shown in the present invention;

[0017] Figure 3 This is an internal structure diagram of an online purgable corrosion-resistant filter shown in the present invention (metal cylinder and quick-release chuck omitted);

[0018] Figure 4 for Figure 3 Enlarged view of the center number A;

[0019] Figure 5 for Figure 3 The structural schematic diagram of the inflation head shown in;

[0020] Figure 6 for Figure 3 The structural diagram of the plastic spring head shown in ;

[0021] Figure 7 for Figure 3 The structural schematic diagram of the plastic spring body shown in;

[0022] Figure 8 for Figure 3 Schematic diagram of the structure of the bottom end cover shown in . DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0024] like Figure 1-8 The corrosion-resistant filter capable of online purge shown comprises a metal cylinder 1 and a quick-release chuck 2 installed at the bottom of the metal cylinder 1. The metal cylinder 1 and the quick-release chuck 2 are connected by a flange.

[0025] The metal cylinder 1 also includes an inflator head 3 installed on the top of the metal cylinder 1. The inflator head 3 includes a one-way valve seat 34, a threaded through hole 32 connected to the one-way valve seat 34, an inflator hose 31 inserted in the threaded through hole 32, a valve head 35 and a bottom valve 33 located in the one-way valve seat 34, and a return spring 36.

[0026] The one-way valve seat 34 and the threaded straight-through 32 are connected through a bottom valve 33, and a guide cylinder 331 and an air inlet 330 are formed on the bottom valve 33. The valve head 35 includes a pressure head 351 and a sliding part 352. The sliding part 352 slides in the guide cylinder 331, and the pressure head 351 fits and closes the threaded straight-through 32 under the action of the return spring 36 to prevent impurities from falling into, thereby ensuring the filtering effect and preventing the filtrate from being discharged from the inflation head 3, thereby ensuring zero pollution. One end of the return spring 36 is connected to the guide cylinder 331, and the other end of the return spring 36 is connected to the sliding part 352.

[0027] After the filtration is completed, compressed gas is introduced into the inflation hose 31, and the compressed gas passes through the threaded through hole 32 and presses the pressure head 351, the reset spring 36 is compressed, and the sliding part 352 slides down in the guide tube 331, thereby driving the pressure head 35 to descend, and the pressure head 35 and the threaded through hole 32 are separated, and the compressed gas enters the bottom valve 33 through the gap between the two, and enters the co-extruded soft bag 4 through the air inlet 330. After about 30 to 40 seconds of inflation, the air valve is closed, and the introduction of compressed gas is stopped. Under the action of the reset spring 36, the pressure head 351 is reset to fit the closed threaded through hole 32 again.

[0028] It also includes a filter element 5 located in the metal cylinder 1. The filter element 5 includes an upper end cover 53, a lower end cover 54, an inner frame 52 located between the upper end cover 53 and the lower end cover 54, and a filter layer 51 coated on the outside of the inner frame 52. The filtrate passes through the filter layer 51 from the outside, is filtered by the filter layer 51, enters the inner frame 52, and is finally discharged from the liquid outlet of the lower end cover 53.

[0029] It also includes a co-extruded soft bag 4 located in the metal cylinder 1. The co-extruded soft bag 4 is coated on the outside of the filter element 5. The compressed gas entering the co-extruded soft bag 4 squeezes the filtrate in the filter element 5, so that the filtrate passes through the filter layer 51 and enters the inner frame 52, so that the filtrate is discharged as much as possible, avoiding waste and reducing costs. After closing the air valve, the metal cylinder 1 is removed, and the co-extruded soft bag 4 is squeezed by hand to empty the filtrate again, so that all the internal filtrate enters the filter layer 51, thereby improving the discharge rate of the filtrate.

[0030] The co-extruded soft bag 4 can prevent the metal cylinder 1 from directly contacting the filtrate, and prevent the metal cylinder 1 from being corroded and causing failure, so that it can be reused. The co-extruded soft bag 4 includes an inner layer and an outer layer. The inner layer is a welding layer made of HDPE or PP material, which is easy to connect. The outer layer is a nylon reinforcement layer with a firm structure.

[0031] The top of the co-extruded soft bag 4 is welded to the one-way valve seat 34, and the bottom of the co-extruded soft bag 4 is welded to the bottom end cap 6, which has strong connection and good sealing, and can prevent the filtrate from leaking and causing pollution. The connection surface between the bottom of the co-extruded soft bag 4 and the bottom end cap 6 has a draft angle of 5 to 10 degrees.

[0032] The bottom end cover 6 connected to the lower end cover 54 is also included. The bottom end cover 6 is squeezed and fixed by the metal cylinder 1 and the quick-release chuck 2.

[0033] The bottom end cover 6 is formed with a liquid inlet 61 and a liquid outlet 62. The liquid inlet 61 is provided with a liquid inlet check valve, and the liquid outlet 62 is provided with a liquid outlet control valve. The quick-release chuck 2 is provided with a liquid inlet channel 21 connected to the liquid inlet 61 and a liquid outlet channel 22 connected to the liquid outlet 62. The liquid inlet channel 21 and the liquid outlet channel 22 are independent of each other.

[0034] The liquid inlet check valve comprises a plastic spring head 72 and a plastic plug 71. The plastic spring head 72 comprises a main body 721 and a corrugated tube body 722 connected to the main body 721. The plastic plug 71 comprises a pressing plate 711 and a rod body 712.

[0035] The liquid inlet 61 is provided with a limit platform connected to the bottom end cover 6. The limit platform includes an outer ring 614, an inner ring 611, and four connecting rods 613 connecting the inner ring 611 and the outer ring 614. The limit platform serves to limit the position of the plastic spring head 72.

[0036] The pressing plate 711 covers the liquid inlet 61. The top of the corrugated tube 722 is attached to the limit platform, and the rod 712 passes through the inner ring 611 and is connected to the plastic spring head 72. The rod 712 and the main body 721 are screwed together, so that the plastic spring head 72 and the plastic plug 71 rise and fall synchronously.

[0037] After the inlet valve is opened, the filtrate flows into the inlet port 61 from the inlet channel 21, the corrugated tube body 722 is compressed, and the plastic spring head 72 is driven to move upward as a whole. Since the plastic spring head 72 and the plastic plug 71 are an integrated structure, the rod body 712 rises in the inner ring 611, the pressure plate 711 rises, the inlet port 61 is opened, and the filtrate enters. After the inlet valve is closed, the corrugated tube body 722 returns to its original state, the plastic spring head 72 is reset, and the rod body 712 is driven to descend in the inner ring 611, and the pressure plate 711 descends and continues to cover the inlet port 61, and the filtrate will not be discharged from the inlet port 61. When replacing, there is no leakage or dripping of the filtrate, and no pollution is caused to the production environment.

[0038] The bottom end cover 6 is formed with a receiving tube 63, and the lower end cover 54 is formed with an extension tube 541, which is inserted into the receiving tube 63 and sealed by an O-ring. The liquid outlet of the lower end cover 54 is located in the extension tube 541, and the liquid outlet 62 is located in the receiving tube 63.

[0039] The liquid outlet control valve includes a plastic spring body 82 abutting against the lower end cover 54 , a liquid outlet plug 81 abutting against the plastic spring body 82 , and a ejector pin 23 abutting against the liquid outlet plug 81 .

[0040] The plastic spring body 82 and the liquid outlet plug 81 are both located in the extension tube 541. The upper end of the plastic spring body 82 abuts against the liquid outlet of the lower end cover 54, so that the filtered liquid enters the plastic spring body 82. The lower end of the liquid outlet plug 81 blocks the liquid outlet 62. The ejector pin 23 is located in the liquid outlet channel 22.

[0041] The ejector pin 23 pushes up the liquid outlet plug 81, the plastic spring body 82 is compressed, the liquid outlet 62 is opened, and the filtered liquid flows out from the plastic spring body 82, and then enters the liquid outlet channel 22 from the liquid outlet 62. When the quick-release chuck 2 is disassembled, the ejector pin 23 is separated from the liquid outlet plug 81, and the plastic spring body 82 returns to its original state, pressing the liquid outlet plug 81, so that the liquid outlet plug 81 continues to press and block the liquid outlet 62, and the filtrate cannot be discharged from the liquid outlet 62. When replacing, the filtrate has zero leakage and zero dripping, and will not cause pollution to the production environment.

[0042] The plastic spring body 82 is hollow. The plastic spring body 82 is formed by connecting a plurality of corrugated tube segments 821, and a plurality of openings 822 are provided on the corrugated tube segments 821. The area of ​​the openings 822 is half of the circumferential area of ​​the corrugated tube segments 821, and the area of ​​the openings 822 and the plastic spring body 82 reach a balance state, which not only maximizes the area of ​​the openings 822, so that the filtered liquid entering the plastic spring body 82 can be discharged from the openings 822 as soon as possible, but also does not affect the plastic spring body 82 to press the liquid outlet plug 81, so that the liquid outlet 62 is closed.

[0043] The thickness b of the plastic spring body 82 is 1.5-2 mm, and the angle a between adjacent corrugated tube sections 821 is 45°-60°, so that the plastic spring body 82 has sufficient rigidity and also has resilience.

[0044] The working principle of the online purgeable corrosion-resistant filter is as follows: assemble the metal cylinder 1 and the quick-release chuck 2, open the liquid inlet valve, and the filtrate flows into the liquid inlet 61 from the liquid inlet channel 21. The liquid inlet check valve is opened, and the filtrate enters the filter, and enters the inner skeleton 52 after being filtered by the filter layer 51. The filtered liquid enters the plastic spring body 82 through the lower end cover 54, and then flows out from the plastic spring body 82, and finally enters the liquid outlet channel 22 from the liquid outlet 62. After the filtration work is completed, close the liquid inlet valve, the liquid inlet 61 is blocked, and the liquid outlet 62 remains open. Open the air valve, fill the filter with compressed gas through the inflation head 3, and use the compressed gas to squeeze the remaining filtrate. Close the air valve, remove the metal cylinder 1, and squeeze the co-extruded soft bag 4 by hand to further discharge the internal filtrate. Finally, remove the quick-release chuck 2 and close the liquid outlet 62. The metal cylinder 1 and the quick-release chuck 2 are reused, and the rest are replaced.

[0045] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A corrosion-resistant filter that can be purged online, characterized in that: It includes a metal cylinder, an inflation head installed on the top of the metal cylinder, a quick-release chuck installed on the bottom of the metal cylinder, a filter element and a co-extruded soft bag located in the metal cylinder; the co-extruded soft bag is coated on the outside of the filter element, and the filter element includes an upper end cover, a lower end cover, an inner frame located between the upper end cover and the lower end cover, and a filter layer coated on the outside of the inner frame; it also includes a bottom end cover connected to the lower end cover, the bottom end cover is formed with a liquid inlet and a liquid outlet, the liquid inlet is provided with a liquid inlet one-way valve, and the liquid outlet is provided with a liquid outlet control valve; the quick-release chuck is provided with a liquid inlet channel connected to the liquid inlet and a liquid outlet channel connected to the liquid outlet.

2. The corrosion-resistant filter capable of online purge according to claim 1, characterized in that: The inflation head includes a one-way valve seat, a threaded through-hole connected to the one-way valve seat, an inflation hose inserted in the threaded through-hole, a valve head and a bottom valve located in the one-way valve seat, and a reset spring; one end of the reset spring is connected to the bottom valve, and the other end of the reset spring is connected to the valve head, a guide cylinder is formed on the bottom valve, one end of the valve head slides in the guide cylinder, and the other end of the valve head fits into and closes the threaded through-hole under the action of the reset spring, and an air inlet hole is provided on the bottom valve.

3. The corrosion-resistant filter capable of online purge according to claim 2, characterized in that: The top of the co-extruded soft bag is connected to the one-way valve seat, the bottom of the co-extruded soft bag is connected to the bottom end cover, and the connecting surface between the bottom of the co-extruded soft bag and the bottom end cover has a draft angle of 5 to 10 degrees.

4. The online purgeable corrosion-resistant filter according to claim 3, characterized in that: The co-extruded soft bag comprises an inner layer and an outer layer, wherein the inner layer is a welding layer made of HDPE or PP material, and the outer layer is a nylon reinforcement layer.

5. The online purgeable corrosion-resistant filter according to claim 1, characterized in that: The liquid inlet one-way valve includes a plastic spring head and a plastic plugging piece. The plastic spring head includes a main body and a corrugated tube body connected to the main body. The plastic plugging piece includes a pressure plate and a rod body. The pressure plate covers the liquid inlet. A limit platform connected to the bottom end cover is provided in the liquid inlet. The top of the plastic spring head fits the limit platform, and the rod body passes through the limit platform and is connected to the plastic spring head.

6. The corrosion-resistant filter capable of online purge according to claim 5, characterized in that: The rod body and the main body are threadedly connected.

7. The corrosion-resistant filter capable of online purge according to claim 1, characterized in that: The liquid outlet control valve comprises a plastic spring body abutting against the lower end cover, a liquid outlet plug abutting against the plastic spring body, and a ejector pin abutting against the liquid outlet plug; the plastic spring body is hollow, and the liquid outlet plug fits against the bottom end cover.

8. The corrosion-resistant filter capable of online purge according to claim 7, characterized in that: The plastic spring body is formed by connecting a plurality of corrugated pipe sections, and a plurality of openings are arranged on the corrugated pipe section, and the area of ​​the openings is half of the circumferential area of ​​the corrugated pipe section.

9. The corrosion-resistant filter capable of online purge according to claim 8, characterized in that: The thickness of the plastic spring body is 1.5-2 mm, and the angle between adjacent corrugated tube sections is 45°-60°.

10. The corrosion-resistant filter capable of online purge according to claim 7, characterized in that: The ejector pin is located in the liquid outlet channel.

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