阅读说明：本技术 过滤碳棒、过滤碳棒的制备方法及其过滤装置 (Filtering carbon rod, preparation method of filtering carbon rod and filtering device of filtering carbon rod ) 是由 路钰伟 王克飞 盛新栋 于 2021-08-31 设计创作，主要内容包括：本发明公开了过滤碳棒、过滤碳棒的制备方法及其过滤装置,其中该过滤碳棒包括至少两层过滤碳层,所述过滤碳层为内外叠加或者上下叠加的过滤层碳层,所述过滤碳层的过滤精度呈梯度变化。本方案中,过滤碳棒包括至少两层不同过滤精度的过滤碳层,能够有效地防止水流中的杂质堵塞在碳棒的外层,提高碳棒的出水率、利用率和使用寿命,同时,通过定位圈和分隔槽分别固定分隔工具的上下两端,能够保证滤料在装入模具的过程中分隔工具不移位,确保不同腔室中的滤料不泄露或混合。(The invention discloses a filtering carbon rod, a preparation method of the filtering carbon rod and a filtering device of the filtering carbon rod, wherein the filtering carbon rod comprises at least two filtering carbon layers, the filtering carbon layers are filtering layer carbon layers which are overlapped inside and outside or overlapped up and down, and the filtering precision of the filtering carbon layers is changed in a gradient manner. In this scheme, filter the carbon-point and include the filtration carbon-layer of at least two-layer different filter fineness, can prevent effectively that the impurity in the rivers from blockking up the skin at the carbon-point, improve the water yield of carbon-point, utilization ratio and life, simultaneously, through the upper and lower both ends of spacer ring and partition groove fixed partition instrument respectively, can guarantee that the filter material separates the instrument and does not shift at the in-process of the mould of packing into, ensures that the filter material in the different cavities does not reveal or mix.)

1. The preparation method of the filtering carbon rod is characterized by comprising the following steps: the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are hollow and filtering layer carbon layers superposed inside and outside, the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: preparing more than two kinds of filter materials with different filtering precisions;

s2: preparing a die with a cavity with a receiving groove, wherein a separating tool for separating the receiving groove into at least two cavities is arranged in the receiving groove, and the separating tool is positioned by a positioning ring which is arranged at the top of the separating tool and can apply downward pressure to the separating tool;

s3: filling each cavity with a filter material with filtering precision, and drawing the separation tool and the positioning ring away from the die when the separation tool has no filtering structure; when the separation tool has a filtering structure, the separation tool can be selectively pulled out of the mold or kept in the mold, and the retainer ring is pulled out of the mold;

s4: and compacting the filter material by a press.

2. The method of manufacturing a filtering carbon rod according to claim 4, wherein: the filtering precision of the filter material is 8 meshes-100 meshes and 80 meshes-400 meshes respectively.

3. The method of manufacturing a filtering carbon rod according to claim 4, wherein: the separation tool is filter cloth, and the filtering precision of the filter cloth is between the filtering precisions of the two adjacent filtering carbon layers.

4. The method of manufacturing a filtering carbon rod according to claim 3, wherein: the filter cloth is PP filter cloth and/or PET filter cloth and/or nylon filter cloth.

5. The method of manufacturing a filtering carbon rod according to claim 1, wherein: the die comprises an outer barrel and a base arranged at the bottom of the outer barrel, a mandrel positioned in the outer barrel is coaxially arranged on the base, a positioning ring used for fixing the top of the separation tool is detachably sleeved on the mandrel, the positioning ring comprises a center ring and positioning clamping blocks arranged on the periphery of the center ring, the inner diameter of the center ring is consistent with the radius of the mandrel, and the length of the clamping blocks is equal to the distance from the mandrel to the separation tool.

6. The method of manufacturing a filtering carbon rod according to claim 5, wherein: the positioning ring is fixedly arranged on the top of the separation tool.

7. The method of manufacturing a filtering carbon rod according to claim 5, wherein: the upper surface of the base is also provided with separating grooves for fixing the bottoms of the separating tools, the number and the positions of the separating grooves are consistent with the number of the separating tools, and the bottoms of the separating tools are detachably embedded in the separating grooves.

8. The preparation method of the filtering carbon rod is characterized by comprising the following steps: the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are filtering layer carbon layers which are overlapped up and down, the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: preparing at least two filter materials with different filter precisions;

s2: preparing a mold having a cavity for receiving the groove;

s3: sequentially placing filter materials with different filter precisions into the accommodating groove according to a preset sequence;

s4: and compacting the filter material by a press.

9. The method of manufacturing a filtering carbon rod according to any one of claims 1 to 8, wherein: the press applies a pressure of 3 kgf to 10kgf to the mold.

10. Filter equipment, its characterized in that: the filter device comprises a carbon filter rod manufactured by the method for manufacturing a carbon filter rod according to any one of claims 1 to 9.

Technical Field

The invention relates to the field, in particular to a filtering carbon rod, a preparation method of the filtering carbon rod and a filtering device of the filtering carbon rod.

Background

The carbon-point is with carrying out the die-casting sintering after certain mesh number's carbon powder and adhesive misce bene and form, and the filter fineness of current carbon-point is inside and outside generally single fixed value, and the dirty stifled meeting of rivers of this type of carbon-point can take place at the skin, and the pollutant hardly enters into the inlayer, often can take place adsorptivity ability when using and still under the fine condition, and the carbon-point just is blockked up, and the water yield of filter core is little, is difficult to continue to use, forms very big waste.

Aiming at the problems, the existing solution mainly adopts a mode of wrapping filter cloth or a filter screen outside a carbon rod to filter impurities in advance or sectional type filtration. The mode of coating the carbon rod with the filter cloth or the filter screen does not solve the problem of single filtering precision of the carbon rod, and meanwhile, the filter cloth or the filter screen is usually connected with the carbon rod in a gluing or welding mode instead of being integrated, so that the preparation process is more complicated, the tightness between the filter cloth or the filter screen and the carbon rod is lower, and the filter cloth or the filter screen is easy to fall off in the long-term use process; the sectional type filtering mode is generally to divide the filtering areas with different precisions into space and perform stage type filtering, and the mode can ensure higher filtering precision and can solve the problem of blockage by controlling the filtering precision in a sectional manner, but the mode requires a larger filtering space due to the need of dividing a plurality of filtering areas, and meanwhile, the preparation process of the filtering carbon rod is complex and the cost is higher.

Disclosure of Invention

Therefore, in order to solve the above problems, the present invention provides a filtering carbon rod, a method for preparing the filtering carbon rod, and a filtering apparatus thereof.

The invention is realized by the following technical scheme:

the preparation method of the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are hollow and filtering layer carbon layers superposed inside and outside, and the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: preparing at least two filter materials with different filter precisions;

s2: preparing a die with a cavity with a receiving groove, wherein a separation tool for separating the receiving groove into at least two cavities is arranged in the receiving groove;

s3: filling a filter material with filtering precision in each chamber;

s4: and compacting the filter material by a press.

Preferably, the filtering carbon rod is divided into at least a first filtering carbon layer and a second filtering carbon layer according to the filtering precision, the mold at least comprises a first cavity and a second cavity, the first cavity is used for accommodating the first filtering carbon layer, and the second cavity is used for accommodating the second filtering carbon layer.

Preferably, between the step S3 and the step S4, the method further comprises drawing the separation tool away from the mold from the top.

Preferably, the separation means and the filter material are compacted together.

Preferably, the separation tool is a filter cloth, and the filtering precision of the filter cloth is between the filtering precisions of the two adjacent filtering carbon layers.

Preferably, the mould includes the urceolus and sets up the base of urceolus bottom, be provided with a dabber on the axle center of base perpendicularly, detachably cover has and is used for fixing on the dabber the position circle of separating the instrument top, the position circle includes the centre ring and sets up the location fixture block of centre ring periphery, the bottom on the outer edge of location fixture block is provided with and is used for fixing separate the stopper of instrument, the internal diameter of centre ring with the radius of dabber is unanimous, the length of fixture block equals the dabber is arrived separate the distance of instrument.

Preferably, the upper surface of the base is further provided with separating grooves for fixing the bottoms of the separating tools, the number and the positions of the separating grooves are consistent with the number of the separating tools, and the bottoms of the separating tools are detachably embedded in the separating grooves.

The preparation method of the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are filtering layer carbon layers which are overlapped up and down, and the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: preparing at least two filter materials with different filter precisions;

s2: preparing a mold having a cavity for receiving the groove;

s3: sequentially placing filter materials with different filter precisions into the accommodating groove according to a preset sequence;

s4: and compacting the filter material by a press.

Preferably, the press applies a pressure of 3 kgf to 10kgf to the mold.

A filter device comprising the carbon filter rod manufactured by the method for manufacturing the carbon filter rod as described above.

The technical scheme of the invention has the following beneficial effects:

1. the filtering carbon rod in the scheme comprises at least two filtering carbon layers with different filtering precisions, so that impurities in water flow can be effectively prevented from being blocked on the outer layer of the carbon rod, the water yield and the utilization rate of the carbon rod are improved, and the service life of the carbon rod is prolonged;

2. according to the preparation method of the carbon rod for filtering, the upper end and the lower end of the separating tool are respectively fixed through the positioning ring and the separating groove, so that the separating tool can be prevented from shifting in the process of filling the filter material into the die, and the filter material in different cavities can be prevented from leaking or mixing;

3. the multilayer filtering carbon layers in the scheme are simultaneously die-cast, so that the tightness among the filtering carbon layers of the filtering carbon rod is ensured, the process steps are reduced, and the production efficiency is improved;

4. in the filtering carbon rod, each layer of filtering carbon layer can be separated by the filter cloth, the filter cloth and the filtering carbon layers are integrally formed by die casting, the filtering precision is between the filtering precisions of two adjacent filtering carbon layers, the filter cloth can not only separate the filtering carbon layers with different filtering precisions, but also can achieve the effects of further filtering and removing the coloring agent in the carbon powder to prevent water flow from turning black;

5. the filtering carbon rods in the scheme are stacked layer by layer and are tightly matched, and meanwhile, filtering materials with other filtering effects can be added into different filtering carbon layers, so that the filtering requirements of different filter elements can be met;

6. the filtering carbon rod in the scheme can be used as one part of the filter element to be matched with other filter elements or the filtering carbon rod is matched for use, so that the filter has stronger adaptability;

7. the filtering carbon rod in the scheme can adjust the volume of each filtering carbon layer according to the water quality difference and the filtering requirement so as to achieve different filtering effects;

8. in the preparation method of the filtering carbon rod, the step of die casting the carbon powder is divided into single die casting and multiple die casting; the carbon rod has the advantages that the carbon rod is structurally selected, the carbon rod is overlapped in an internal and external mode, the carbon rod is overlapped up and down, the position selection of the filtering carbon layer with each filtering precision can be adjusted according to the requirements according to different selections of a water inlet mode and a water outlet mode, and the flexibility of the carbon rod and the preparation process of the carbon rod is greatly improved.

Drawings

FIG. 1: is a longitudinal section view of the die for preparing the filtering carbon rod in the invention;

FIG. 2: is a longitudinal section view of the filtering carbon rod prepared by the preparation method in the first scheme;

FIG. 3: is a top view of the filtering carbon rod prepared by the preparation method in the first scheme;

FIG. 4: is a longitudinal section view of the filtering carbon rod prepared by the preparation method in the second scheme;

FIG. 5: is a top view of the positioning ring of the invention;

FIG. 6: the relationship between the water passing amount and the pressure difference of the single-precision carbon rod and the composite gradient filtering carbon rod in the scheme is shown schematically.

Detailed Description

In order that the objects, advantages and features of the invention will be more clearly and specifically shown and described, there shall now be shown and explained by way of the following non-limiting illustration of preferred embodiments. The embodiment is only a typical example of the technical solution of the present invention, and any technical solution formed by adopting equivalent replacement or equivalent transformation falls within the scope of the present invention.

It is also stated that in the description of the schemes, it is to be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first" and "second" in this document are used for descriptive purposes only and are not to be construed as indicating or implying a ranking of importance or an implicit indication of the number of technical features shown. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the present invention, "a plurality" means two or more unless specifically defined otherwise.

The invention discloses a filtering carbon rod, a preparation method of the filtering carbon rod and a filtering device of the filtering carbon rod, wherein the filtering carbon rod comprises at least two filtering carbon layers, the filtering carbon layers are filtering layer carbon layers which are overlapped inside and outside or overlapped up and down, and the filtering precision of the filtering carbon layers is changed in a gradient manner.

Specifically, for the carbon-point of single precision, because it includes the filtration carbon-point of two-layer at least different filter fineness's filtration carbon-point to filter the carbon-point, impurity is difficult to block up at the carbon-point is outer, reduces the pressure differential of carbon-point, can improve the holistic water yield of carbon-point, as shown in figure 6, line 5 filters the carbon-point for the compound gradient of the filtration carbon-point of the different filter fineness in both sides, and line 6 is the carbon-point of the single precision with diameter and volume, and wherein, the ordinate is the pressure differential when the carbon-point crosses water, and the abscissa is the water yield of crossing of carbon-point.

According to the attached figure 6, under the condition of the same water passing amount, the pressure difference of the carbon rod with single precision far exceeds the pressure difference of the composite gradient filtering carbon rod, and meanwhile, the whole water passing amount of the composite gradient filtering carbon rod is far larger than that of the carbon rod with single precision.

In addition, according to the difference of the structure of the filtering carbon rod, the following two different schemes can be roughly distinguished:

the first scheme is as follows:

the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are hollow and filtering layer carbon layers superposed inside and outside, the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: preparing more than two kinds of filter materials with different filtering precisions;

s2: preparing a die with a cavity with a receiving groove, wherein a separating tool for separating the receiving groove into at least two cavities is arranged in the receiving groove, and the separating tool is positioned by a positioning ring which is arranged at the top of the separating tool and can apply downward pressure to the separating tool;

s3: filling each cavity with a filter material with filtering precision, and drawing the separation tool and the positioning ring away from the die when the separation tool has no filtering structure; when the separation tool has a filtering structure, the separation tool can be selectively pulled out of the mold or kept in the mold, and the retainer ring is pulled out of the mold;

s4: and compacting the filter material by a press.

Specifically, the press applies a pressure of 3 kgf to 10kgf to the mold.

Specifically, the mold comprises an outer cylinder 5 and a base 9 arranged at the bottom of the outer cylinder 5, a mandrel 10 is vertically arranged on the axis of the base 9, the diameter of the mandrel 10 is consistent with the diameter of a through hole 4 in the middle of the carbon rod to be filtered, a positioning ring 12 for fixing the top of the separation tool 8 is detachably sleeved on the mandrel 10, the positioning ring 12 comprises a center ring 121 and positioning blocks 122 arranged on the periphery of the center ring 121, at least two positioning blocks 122 are provided, feed inlets for passing filter materials are arranged between the positioning blocks 122, a limiting block for fixing the separation tool 8 is arranged at the bottom of the outer edge of each positioning block 122, the inner diameter of the center ring 121 is consistent with the radius of the mandrel 10, the length of each positioning block is equal to the distance from the mandrel 10 to the separation tool 8, specifically, the inner side of the limiting block just contacts with the top of the outer wall of the separation tool 8, the center ring 121 is movably sleeved on the periphery of the mandrel 10, when the separation tool 8 is required to be positioned, the top end of the separation tool 8 is fixed to the limiting block on the positioning ring 12, the separation tool 8 is placed into a mold, and finally the center ring 121 on the positioning ring 12 penetrates through the mandrel 10 and is influenced by the gravity of the positioning ring 12, and the separation tool 8 cannot move randomly in the feeding process.

The separation tool 8 in this embodiment may be a separation tool 8 of any shape and material capable of separating different carbon filter layers, and in a specific implementation process, specific process steps and structures of the carbon filter rod may be adjusted according to differences of the separation tool 8, and specifically includes the following embodiments:

example 1:

the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are hollow and filtering layer carbon layers superposed inside and outside, the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: respectively preparing filter materials with particle sizes of 8-100 meshes and 80-400 meshes and different filtering precisions;

s2: preparing a die with a cavity with a receiving groove, wherein a separating tool for separating the receiving groove into at least two cavities is arranged in the receiving groove, and the separating tool is positioned by a positioning ring which is arranged at the top of the separating tool and can apply downward pressure to the separating tool;

s3: filling a filter material with filtering precision in each chamber;

s31: the separation tool 8 and the positioning ring are drawn out of the mould from the top;

s4: and compacting the filter material by a press.

Specifically, the filter material in the scheme is divided into a first filter carbon layer 1 and a second filter carbon layer 2 according to the filter precision, the mould is cylindrical as a whole and comprises a first cavity 6 and a second cavity 7, the first cavity 6 is used for accommodating the first filtering carbon layer 1, the second cavity 7 is used for accommodating the second filtering carbon layer 2, a separating tool 8 is detachably arranged between the first cavity 6 and the second cavity 7 through a positioning ring 12, the height of the separating tool 8 is higher than that of the outer cylinder 5 of the mold, in this embodiment, the separation tool 8 may be any cylindrical separation tool 8 made of a hard material, such as a metal cylinder, a plastic cylinder, a hard paper cylinder, etc., after all the filter material is poured, the retainer ring 12 and the separation tool 8 are respectively taken out, the end cover 11 is covered, then the die filled with the filter material is placed into a press for die-casting forming, so that the first filtering carbon layer 1 and the second filtering carbon layer 2 are tightly matched.

Further, the type of the filter material and the number of the chambers can be adjusted as required, specifically, more than two chambers can be provided, and the filter material is selectively distributed in each chamber according to the gradient sequence of the filter precision and different functions of the filter material.

Example 2:

the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are hollow and filtering layer carbon layers superposed inside and outside, the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: respectively preparing filter materials with particle sizes of 8-100 meshes and 80-400 meshes and different filtering precisions;

s2: preparing a die with a cavity with a receiving groove, wherein a separating tool for separating the receiving groove into at least two cavities is arranged in the receiving groove, and the separating tool is positioned by a positioning ring which is arranged at the top of the separating tool and can apply downward pressure to the separating tool;

s3: filling a filter material with filtering precision in each chamber;

s4: drawing the positioning ring away from the mold;

s5: and compacting the filter material by a press.

Specifically, in the present embodiment, the separation tool 8 is a filter cloth 3, the filter cloth 3 is made of a material having a certain hardness, and specifically, the filter cloth 3 can be one or more of PP filter cloth, PET filter cloth and nylon filter cloth, the filtering precision of the filter cloth 3 is between the filtering precision of two adjacent filtering carbon layers, the height of the filter cloth 3 is consistent with that of the outer cylinder 5 of the mold and is positioned by a positioning ring 12, the filter cloth 3 and the positioning ring 12 are positioned in the same way as the separation tool 8 and the positioning ring 12 in the embodiment 1, after the filter cloth 3 is positioned, two filter materials with different filtering precisions of 8 meshes to 100 meshes and 80 meshes to 400 meshes are respectively poured into the first cavity 6 and the second cavity 7, after all the filter material is poured, the end cover 11 is covered, and then the die filled with the filter material and the filter cloth 3 is placed into a press for die-casting forming.

Further, in this embodiment, before the filter cloth 3 is placed in the mold, the filter cloth 3 needs to be cut and glued, the height and the circumference of the filter cloth 3 are determined according to the height of the outer cylinder 5 in the mold and the diameter of the cavity, the glued part is reserved, the filter cloth 3 is cut, and after the cutting is completed, glue is coated and glued on the glued part on one side of the filter cloth 3.

Example 3:

the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are hollow and filtering layer carbon layers superposed inside and outside, the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: respectively preparing filter materials with particle sizes of 8-100 meshes and 80-400 meshes and different filtering precisions;

s2: preparing a die having a cavity with a receiving groove, wherein a separation tool 8 for separating the receiving groove into two cavities is arranged in the receiving groove;

s3: filling a filter material with filtering precision in one cavity, and compacting the filter material by a press;

s31: the separation tool 8 and the positioning ring are drawn out of the mould from the top;

s4: the other chamber is filled with another filter material of a different filtration precision and all the filter material is compacted together.

Example 4:

the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are hollow and filtering layer carbon layers superposed inside and outside, the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: respectively preparing filter materials with particle sizes of 8-100 meshes and 80-400 meshes and different filtering precisions;

s2: preparing a die having a cavity with a receiving groove, wherein a separation tool 8 for separating the receiving groove into two cavities is arranged in the receiving groove;

s3: filling a filter material with filtering precision in one cavity, and compacting the filter material by a press after the positioning ring is pulled away;

s4: the other chamber is filled with another filter material of a different filter fineness and all filter material and the separating means are compacted together.

Further, in the first embodiment, the upper surface of the base 9 is further provided with separating grooves 91 for fixing the bottoms of the separating tools 8, the number and the positions of the separating grooves 91 are the same as the number of the separating tools 8, the positions of the separating grooves 91 can be set according to the volume requirement of each chamber, the bottoms of the separating tools 8 can be detachably embedded in the separating grooves 91, specifically, the separating grooves 91 are wide at the top and narrow at the bottom as a whole, and the longitudinal section of the separating grooves 91 is in a "V" shape, and the separating grooves 91 can cooperate with the positioning rings 12 to respectively fix the bottom ends and the top ends of the separating tools 8.

Scheme II:

the filtering carbon rod comprises at least two filtering carbon layers, wherein the filtering carbon layers are filtering layer carbon layers which are overlapped up and down, the filtering precision of the filtering carbon layers is changed in a gradient manner, and the preparation method at least comprises the following steps:

s1: preparing at least two filter materials with different filter precisions;

s2: preparing a mold having a cavity for receiving the groove;

s3: sequentially placing filter materials with different filter precisions into the accommodating groove according to a preset sequence;

s4: and compacting the filter material by a press.

Specifically, the press applies a pressure of 3 kgf to 10kgf to the mold.

Further, the mold may be any mold having a shape of an accommodating space, and the accommodating groove of the mold may be cylindrical, square, truncated cone, or the like; and a layer of filter cloth 3 or a filter screen can be laid between every two layers of filter materials, the filter precision of the filter cloth 3 or the filter screen is between the filter precision of the adjacent two layers of filter carbon layers, after the filter materials are assembled, a die filled with the filter materials and the filter cloth 3 is placed into a press, and the filter materials and the filter cloth 3 are compacted.

In the first and second solutions, the positions of the filtering carbon layers with different precisions can be adjusted according to the difference between the water inlet end and the water outlet end, specifically, the filtering carbon layers near the water inlet end have lower filtering precision, the filtering carbon layers near the water outlet end have higher filtering precision, and the filtering precision of the filtering carbon layers of other layers are sequentially arranged according to the gradually increasing or decreasing gradient sequence with reference to the positions of the water inlet end and the water outlet end.

Specifically, as in the first embodiment, if the water inlet end is disposed at the through hole 4 in the middle of the carbon rod, and the water outlet end is disposed on the outer surface of the carbon rod, the filtering accuracy of the innermost filtering carbon layer of the carbon rod is the lowest, and then the filtering accuracy of each filtering carbon layer increases progressively from inside to outside until the outermost filtering carbon layer reaches the maximum filtering accuracy; if the water inlet end is arranged on the outer surface of the carbon rod and the water inlet end is arranged on the inner wall of the through hole 4 in the carbon rod, the arrangement sequence of the precision filtering carbon layers is opposite to the arrangement sequence; meanwhile, according to the scheme, the water inlet end is arranged at the top of the filtering carbon rod, the water outlet end is arranged at the bottom of the filtering carbon rod, the filtering precision of each filtering carbon layer is sequentially increased from top to bottom, and otherwise, the filtering precision is sequentially decreased from top to bottom.

Further, the volume ratio of each filtering carbon layer can be adjusted according to the difference of the filtering precision requirements of the carbon rod, specifically, when the filtering water body has more impurities, larger water flow and lower requirements on the filtering precision of water, the volume of the filtering carbon layer with low filtering precision can be properly increased, the volume of the filtering carbon layer with high filtering precision is reduced, and at the moment, the water yield of the carbon rod is large, the carbon rod is not easy to block, and the service life of the carbon rod is longer; when the impurity in the filtering water body is less and the requirement on the filtering precision of water is higher, the volume of the filtering carbon layer with high filtering precision can be properly increased, the volume of the carbon layer with low filtering precision is reduced, and the integral filtering precision of the carbon rod is higher at the moment.

Furthermore, the type of the filter material of each filter carbon layer can be adjusted as required to increase the filtering performance of the carbon rod, for example, the filter material of the filter carbon layer near the water inlet end adopts common carbon powder, the filter material of the filter carbon layer near the water outlet end adopts activated carbon powder, the filter material with other filtering functions can be added into the carbon powder according to different filtering requirements, the adhesive is mixed into the filter material, and the filter material and the activated carbon powder are together placed into a die for die casting and calcination to prepare the multifunctional composite carbon rod.

The invention further discloses a filtering carbon rod which comprises the filtering carbon rod manufactured by the preparation method of the filtering carbon rod, specifically, the filtering carbon rod manufactured by the preparation method can be used alone, can be used as a part of a filter element and placed in the filtering carbon rod, and can be used for wrapping a framework, an end cover 11 or a filter screen on the outer layer of the carbon rod to manufacture the filter element.

The invention has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the invention.