Candle filter

Abstract

The invention provides a candle type filter. A plurality of filtering elements and bag type inner bags arranged outside the filtering elements in a sleeving mode are installed in the filter. The bag type inner bag comprises a plurality of finger-shaped sub-bags independently wrapping the filter element, elastic limiting mechanisms are arranged at finger webs of the adjacent finger-shaped sub-bags, each elastic limiting mechanism comprises a forked clamping piece and a tension spring, the forked clamping pieces are connected to the finger webs of the finger-shaped sub-bags, and the two ends of each tension spring are connected with the forked clamping pieces and the inner top of the filter respectively. According to the candle filter provided by the invention, the filter element and the tension spring can be separated from the filter from the outside of the bag-type inner bag, and then the top of the bag-type inner bag is tightly hooped, so that the operation is completed in one step, the operation is convenient, zero contact with a high-risk medium is realized, and the use safety of the filter is improved; the use of the bag type inner bag is not influenced by the number and the arrangement mode of the filter elements, and each finger-shaped sub-bag independently wraps one filter element, so that material waste caused by the fact that part of the filter elements cannot be comprehensively and directly extruded is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to a candle filter. Background Art

[0002] The candle filter is a closed-operation, high-efficiency, high-precision, safe, reliable and easy-to-maintain filtering product that can be integrated with valves, instruments, electrical controls, etc. to form an intelligent, fully automatic self-cleaning filtering system.

[0003] Candle filters are widely used in many industrial fields such as petrochemical, electronic semiconductor, food and beverage, medical and pharmaceutical, etc. Candle filters can automatically filter and remove particles in liquid or gas, and can form filter cakes for discharge. They can automatically regenerate filter elements without stopping the system. They are fully automatic, do not stop work, reduce manual cleaning, and do not need to replace filter elements. They are widely used in continuous production, high-risk operating environments, and occasions where impurities are sticky and ordinary metal filter elements are not suitable.

[0004] At present, traditional candle filters have certain shortcomings: for high-risk media, when replacing filter elements, personnel will come into contact with the media, causing safety risks; filter elements are easy to clog, the regeneration effect is poor, and the service life of the elements is not long; during backwashing, material loss is serious, causing huge waste to customers; the filtration accuracy and filtration efficiency are not high, and cannot meet customers' requirements for fine filtration; the equipment structure is complex, and maintenance and repair are cumbersome and time-consuming; the sealing performance of the equipment and filter elements is not high, affecting the filtration effect, etc.

[0005] In view of this, it is necessary to design a candle filter to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to disclose a candle filter. When the filter element needs to be replaced, the filter element together with the tension spring can be separated from the filter from the outside of the capsule inner bag, and then the top of the capsule inner bag can be tightened, which is done in one go and is easy to operate, thereby achieving zero contact with high-risk media and improving the safety of filter use. The use of the capsule inner bag is not affected by the number and arrangement of filter elements. Each finger-shaped sub-bag independently wraps a filter element. When the filter element is self-cleaned, under the action of compressed gas, each finger-shaped sub-bag shrinks toward the filter element it independently wraps, and the residual liquid in the finger-shaped sub-bag and the liquid in the filter cake on the surface of the wrapped filter element are all squeezed out of the clear liquid outlet, thereby avoiding the waste of materials caused by the inability of some filter elements to be fully and directly squeezed.

[0007] To achieve the above-mentioned objectives, the present invention provides a candle filter, in which a plurality of filter elements and a bladder-type inner bag are installed outside the filter elements; the bladder-type inner bag includes a plurality of finger-shaped sub-bags that independently wrap the filter elements, and an elastic limiting mechanism is provided at the finger webs of adjacent finger-shaped sub-bags, and the elastic limiting mechanism includes a forked card connected to the finger webs of the finger-shaped sub-bags and a tension spring, and the two ends of the tension spring are respectively connected to the forked card and the top of the filter.

[0008] In some embodiments, the bifurcated card is heat-fused to the bladder-type inner bag, and the bifurcated card includes two side edges and an arc-shaped edge connecting the two side edges, the two side edges are arranged at an angle, and the two side edges of the bifurcated card extend to adjacent finger-shaped sub-bags respectively.

[0009] In some embodiments, the bladder-type inner bag includes an upper portion and a lower portion that are connected, the lower portion is a plurality of finger-shaped sub-bags, and the upper portion is a connected bag.

[0010] In some embodiments, the bifurcated card and the top of the filter are both provided with a limiting ring, and the end of the tension spring is hooked on the limiting ring.

[0011] In some embodiments, the filter includes a filter housing, a filter top cover, and a filter bottom cover; the filter top cover and the filter bottom cover are respectively connected to the upper and lower ends of the filter housing through clamps, and the filter top cover and the filter housing extrusion surface, the filter bottom cover and the filter housing extrusion surface are provided with a third sealing ring.

[0012] In some embodiments, the filter top cover is provided with a plurality of sockets, the filter element is provided with a first sealing ring, the filter element is inserted into the sockets, and the first sealing ring is in a squeezed state.

[0013] In some embodiments, the open end of the bladder-type inner bag is clamped between the filter housing and the filter top cover, and a second sealing ring is provided at the open end of the bladder-type inner bag, and the second sealing ring is in a squeezed state.

[0014] In some embodiments, the second sealing ring is hollow, and a draw cord is provided inside the second sealing ring.

[0015] In some embodiments, a raw liquid inlet and a clear liquid outlet are provided on the filter top cover, the raw liquid inlet is connected to the bladder-type inner bag, and the clear liquid outlet is connected to the filter element outlet.

[0016] In some embodiments, the raw liquid inlet is externally connected to a liquid inlet pipe, the clean liquid outlet is externally connected to a liquid outlet pipe, and an air inlet pipe is provided on the bottom cover of the filter.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: when the candle-type filter provided by the present invention needs to replace the filter element, the filter element together with the tension spring can be separated from the filter from the outside of the capsule inner bag, and then the top of the capsule inner bag can be tightened, which is done in one go and easy to operate, thereby achieving zero contact with high-risk media and improving the safety of filter use; the use of the capsule inner bag is not affected by the number and arrangement of filter elements, each finger-shaped sub-bag independently wraps a filter element, and when the filter element is self-cleaned, under the action of compressed gas, each finger-shaped sub-bag shrinks toward the filter element it independently wraps, and squeezes out all the residual liquid in the finger-shaped sub-bag and the liquid in the filter cake on the surface of the wrapped filter element out of the clear liquid outlet, thereby avoiding the waste of materials caused by the inability of some filter elements to be fully and directly squeezed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the candle filter shown in the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of the center number A;

[0020] Figure 3 for Figure 1 An enlarged view of the part labeled B;

[0021] Figure 4 It is a structural schematic diagram of the bag-type inner bag shown in the present invention. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 1-4 The candle filter shown has a self-cleaning function while ensuring filtering performance, thereby increasing the service life of the filter element 6.

[0024] The filter comprises a filter housing 1, a filter top cover 2, and a filter bottom cover 3. The filter top cover 2 is connected to the upper end of the filter housing 1 through a clamp 42, and the filter bottom cover 3 is connected to the lower end of the filter housing 1 through a clamp 41. The device has a simple structure, and the filter adopts a quick-release structure at the top and bottom, which is convenient for disassembly and assembly, greatly improving the convenience of maintenance and disassembly.

[0025] The filter top cover 2 and the filter housing 1 extrusion surface are provided with a third sealing ring 12, and the filter bottom cover 3 and the filter housing 1 extrusion surface are provided with a third sealing ring 11, which improves the sealing performance of the filter and ensures the filtering effect.

[0026] The filter top cover 2 is provided with a raw liquid inlet 21 and a clear liquid outlet 22, the raw liquid inlet 21 is connected to the bladder-type inner bag 5, and the clear liquid outlet 22 is connected to the filter element outlet 62. The raw liquid inlet 21 is externally connected to a liquid inlet pipe 23, and the clear liquid outlet 22 is externally connected to a liquid outlet pipe 24. The filter bottom cover 3 is provided with an air inlet pipe 31 for introducing compressed air.

[0027] A plurality of filter elements 6 are installed in the filter, and the filter elements 6 can be arranged in any arrangement. The filter elements 6 are high-efficiency and high-precision filter elements, with a filtration precision of up to 0.1 micron and a filtration efficiency of 99.9%.

[0028] The filter top cover 2 is provided with a plurality of sockets, and the filter element 6 is plugged into the sockets, which is convenient for plugging and unplugging, and is convenient for removing the filter element 6 from the outside of the capsule inner bag 5. The filter element 6 is provided with a first sealing ring 61, which is squeezed by the filter element 6 and the inner wall of the socket and is in a squeezed state, thereby improving the sealing performance of the filter and ensuring the filtering effect.

[0029] It also includes a bladder-type inner bag 5 sleeved on the outside of the filter element 6. The bladder-type inner bag 5 is a flexible acid-resistant and alkali-resistant plastic bag suitable for various high-risk media. The bladder-type inner bag 5 is relatively large, so it is convenient for filtering and self-cleaning. The bladder-type inner bag 5 includes an upper part and a lower part that are connected. The lower part is a plurality of finger-shaped sub-bags 51, and the upper part is a connecting bag 53. The connecting bag 53 is convenient for fixing the open end of the bladder-type inner bag 5, and it is convenient for injecting the medium into each finger-shaped sub-bag 51.

[0030] The open end of the bladder-type inner bag 5 is clamped between the filter housing 1 and the filter top cover 2. The open end of the bladder-type inner bag 5 is provided with a second sealing ring 52. The second sealing ring 52 is squeezed by the filter housing 1 and the filter top cover 2 and is in a squeezed state, thereby improving the sealing of the filter and ensuring the filtering effect.

[0031] The second sealing ring 52 is hollow, and a drawstring is provided inside the second sealing ring 52 , which is similar to the drawstring garbage bag structure, and can quickly tighten the top of the sac inner bag 5 .

[0032] By adopting the first sealing ring 61, the second sealing ring 52, the third sealing ring 11, and the third sealing ring 12, a multi-pass sealing structure is adopted to ensure the sealing effect of the filter.

[0033] The bladder-type inner bag 5 includes a plurality of finger-shaped sub-bags 51 . The bladder-type inner bag 5 is suitable for wrapping a plurality of filter elements 6 , especially filter elements 6 in any arrangement, and is not affected by the number of the filter elements 6 and the arrangement thereof.

[0034] Each finger-shaped sub-bag 51 independently wraps a filter element 6. When the filter element 6 is self-cleaning, under the action of compressed gas, each finger-shaped sub-bag 51 shrinks toward the filter element 6 it independently wraps, and all the residual liquid in the finger-shaped sub-bag 51 and the liquid in the filter cake on the surface of the wrapped filter element 6 are squeezed out of the clear liquid outlet 22. Each finger-shaped sub-bag 51 is responsible for one filter element 6, avoiding the waste of material caused by the inability to fully and directly squeeze some filter elements 6.

[0035] An elastic limiting mechanism is provided at the webs 52 of adjacent finger-shaped sub-bags 51, i.e., the part between adjacent finger-shaped sub-bags 51, to assist in positioning the finger-shaped sub-bags 51 and lift the finger-shaped sub-bags 51 to better wrap the filter element 6, so that different filter elements 6 are separated, and the filter cake on the surface of each filter element 6 can be fully squeezed to avoid material waste.

[0036] The elastic limiting mechanism includes a bifurcated card 8 connected to the finger web 52 of the finger-shaped sub-bag 51 and a tension spring 7. The bifurcated card 8 is a plastic sheet and is hot-melt connected to the bladder-type inner bag 5. The bifurcated card 8 is also hot-melt-connected with a limiting ring 70, which is a plastic ring.

[0037] The bifurcated card 8 includes two side edges 82 and an arcuate edge 81 connecting the two side edges 82. The two side edges 82 are arranged at an angle, so that during self-cleaning, it is easier for the compressed gas to rush into the space between the adjacent finger-shaped sub-bags 51. By providing the arcuate edge 81, the bendability and elasticity of the bifurcated card 8 are improved, and when the finger-shaped sub-bag 51 is attached to the corresponding filter element 6, it is not easy to be damaged.

[0038] The two side edges 82 of the bifurcated card 8 extend to the adjacent finger-shaped sub-bags 51 respectively, playing a role in positioning and shaping, so that there is a gap between the outsides of adjacent finger-shaped sub-bags 51, and the adjacent finger-shaped sub-bags 51 are open. On the one hand, during self-cleaning, it is convenient for compressed gas to rush into the space between adjacent finger-shaped sub-bags 51, so that the adjacent finger-shaped sub-bags 51 can be quickly separated; on the other hand, during self-cleaning, under the action of compressed gas, each finger-shaped sub-bag 51 can quickly and accurately shrink toward the filter element 6 independently wrapped by it, to prevent confusion; on the other hand, during self-cleaning, the bifurcated card 8 plays a role in resisting the impact of compressed gas, thereby protecting the stability of the bladder-type inner bag 5.

[0039] A limiting ring 70 is heat-fused on the bifurcated card 8, and a limiting ring 71 is integrally formed on the filter top cover 2. The upper and lower ends of the tension spring 7 are respectively hooked on the limiting ring 71 and the limiting ring 70, which is convenient for disassembly and assembly, and the tension spring 7 can be easily removed from the outside of the capsule inner bag 5.

[0040] The medium enters the filter housing 1 from the raw liquid inlet 21. Under the action of pressure, the bladder-type inner bag 5 expands and fits tightly against the inner wall of the filter housing 1. Adjacent finger-shaped sub-bags 51 fit together, and the finger-shaped sub-bags 51 fall down. The tension spring 7 is stretched and filtered from the outside to the inside through the filter element 6. Impurities are intercepted on the surface of the filter element 6, and the filtered clear liquid enters the clear liquid outlet 22 through the filter element outlet 62 and flows out.

[0041] When the pressure difference between the filter inlet and outlet reaches the set value, the filter needs to be self-cleaned to regenerate the filter element 6. The valve of the raw liquid inlet 21 is cut off, the medium in the capsule inner bag 5 is reduced, the tension spring 7 is reset, and under the pull of the tension spring 7, the finger-shaped sub-bag 51 is reset and rises to fully wrap the filter element 6. Compressed air is introduced from the air inlet pipe 31, so that the capsule inner bag 5 shrinks inward and wraps the outside of the filter element 6. Specifically, each finger-shaped sub-bag 51 shrinks toward the filter element 6 that it independently wraps, and the residual liquid in the filter and the liquid in the filter cake on the surface of the filter element 6 are all squeezed out of the clear liquid outlet 22, avoiding the waste of user materials, while reducing the moisture content of the filter cake on the outer surface of the filter element 6, thereby improving the efficiency of backblowing and cake removal. When the liquid is completely squeezed out of the filter, the gas from the air inlet pipe 31 is stopped, and compressed air or clean liquid is introduced from the clear liquid outlet 22 to backblow or backwash the filter element 6, so that the filter cake on the outer surface of the filter element 6 falls off, thereby regenerating the filter element 6.

[0042] When the filter element 6 reaches the end of its service life and needs to be replaced, the clamp 41 can be opened, the filter bottom cover 3 and the third sealing ring 11 can be removed, and the filter element 6 together with the first sealing ring 61 can be removed from the outside of the capsule inner bag 5, and then the tension spring 7 can be separated from the filter top cover 2, and the top clamp 42 can be opened, and the second sealing ring 52 can be removed from the filter top cover 2. The top of the capsule inner bag 5 can be tightened with the drawstring of the second sealing ring 52, and the filter element 6 and the tension spring 7 in the bag can be discarded or sent to a safe area for cleaning. It is done in one go, easy to operate, and achieves zero contact with high-risk media, which improves the safety of the filter. After cleaning the filter parts, install new capsule inner bag 5, filter element 6, tension spring 7 and other components.

[0043] 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.

[0044] 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. Candle filter, characterized in that: The filter is equipped with a plurality of filter elements and a bladder-type inner bag which is sleeved on the outside of the filter elements; the bladder-type inner bag includes a plurality of finger-shaped sub-bags which independently wrap the filter elements, and an elastic limiting mechanism is provided at the finger webs of adjacent finger-shaped sub-bags, and the elastic limiting mechanism includes a forked card connected to the finger webs of the finger-shaped sub-bags and a tension spring, and the two ends of the tension spring are respectively connected to the forked card and the top of the filter.

2. The candle filter according to claim 1, characterized in that The bifurcated card is heat-fused on the pouch-type inner bag. The bifurcated card includes two side edges and an arc-shaped edge connecting the two side edges. The two side edges are arranged at an angle. The two side edges of the bifurcated card extend to adjacent finger-shaped sub-bags respectively.

3. The candle filter according to claim 2, characterized in that: The bladder-type inner bag comprises an upper part and a lower part which are connected to each other, wherein the lower part is a plurality of finger-shaped sub-bags, and the upper part is a connecting bag.

4. The candle filter according to claim 2, characterized in that: The forked card and the top of the filter are both provided with a limiting ring, and the end of the tension spring is hooked on the limiting ring.

5. The candle filter according to claim 1, characterized in that: The filter comprises a filter housing, a filter top cover, and a filter bottom cover; the filter top cover and the filter bottom cover are respectively connected to the upper and lower ends of the filter housing through clamps, and the extrusion surfaces of the filter top cover and the filter housing, and the filter bottom cover and the filter housing are all provided with a third sealing ring.

6. The candle filter according to claim 5, characterized in that: The filter top cover is provided with a plurality of sockets, the filter element is provided with a first sealing ring, the filter element is plugged into the sockets, and the first sealing ring is in a squeezed state.

7. The candle filter according to claim 6, characterized in that The open end of the bladder-type inner bag is clamped between the filter housing and the filter top cover, and a second sealing ring is provided at the open end of the bladder-type inner bag, and the second sealing ring is in a squeezed state.

8. The candle filter according to claim 7, characterized in that The second sealing ring is hollow, and a draw cord is arranged inside the second sealing ring.

9. The candle filter according to claim 7, characterized in that: The filter top cover is provided with a raw liquid inlet and a clear liquid outlet, the raw liquid inlet is communicated with the capsule inner bag, and the clear liquid outlet is communicated with the filter element outlet.

10. The candle filter according to claim 9, characterized in that The raw liquid inlet is externally connected to a liquid inlet pipe, the clean liquid outlet is externally connected to a liquid outlet pipe, and an air inlet pipe is arranged on the bottom cover of the filter.

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