Filtering device for recycling wire drawing liquid

Abstract

The utility model relates to a filtering device for recycling wire drawing liquid, which comprises a cylinder shell capable of completing multiple filtering of the wire drawing liquid in sections, the cylinder shell comprises a coarse filtering shell positioned at the axial upper section, a connecting guide shell positioned at the axial middle section and a fine filtering shell positioned at the axial lower section, a coarse filtering assembly, an adjustable communicating pipeline and a fine filtering assembly are respectively arranged in the coarse filtering shell, the connecting guide shell and the fine filtering shell which are connected in sequence, and the coarse filtering assembly and the fine filtering assembly are used for purifying the wire drawing liquid in a manner of constructing a two-stage filtering structure; the fine filtering assembly synchronously completes uninterrupted fine filtering and filter residue cleaning in a partitioned filtering manner; the axial upper end surface and the axial lower end surface of the cylinder shell are respectively provided with a flow inlet and a flow outlet which are used for limiting the inflow and the outflow of wire drawing liquid. The wire drawing liquid filtering device can continuously and continuously perform efficient and high-quality multiple filtering on the wire drawing liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of wire drawing liquid impurity filtering equipment, in particular to a filtering device for wire drawing liquid recycling. Background Art

[0002] Wire drawing is a metal processing technology. In metal pressure processing, the metal is forced through the wire drawing die under the action of external force, the metal cross-sectional area is compressed, and the technical processing method of obtaining the required cross-sectional area shape and size is called metal wire drawing process. During the wire drawing process, the copper wire will generate a lot of heat. If it is not cooled down immediately, it will react with the surrounding air, causing oxidation on the surface of the copper wire and reducing the conductivity of the copper conductor. The use of synthetic wire drawing liquid for continuous annealing can not only prevent the oxidation and discoloration of the copper wire after drawing, but also has excellent lubrication and extreme pressure properties, improves processing accuracy and surface finish, and has low wire drawing die consumption, effectively protects the wire or wire, minimizes the occurrence of surface quality defects, and maximizes the service life of the die. Its excellent cleaning function allows the wire drawing machine to not get metal powder and sludge on the die and the tower wheel when the wire is drawn at high speed, and greatly extends the life of the die and the tower wheel.

[0003] At present, conventional drawing liquid recycling systems usually filter the impurities of the drawing liquid through a single filter screen and a static tank, and the filtering effect and efficiency are low. For example, the patent document with the publication number CN207221485U discloses an enameled wire drawing liquid filtering device, which includes a square frame tank with a width equal to that of the drawing liquid reflux tank, a bottom support net is fixed at the bottom of the square frame tank, a layer of filter cotton is laid on the bottom support net, and a layer of stainless steel filter net is arranged on the filter cotton. Although the device can perform secondary filtration on the drawing liquid by setting filter cotton and filter screen, the continuous accumulation of impurities during the drawing process will cause the filtering efficiency and effect of such devices to gradually decay, and it is impossible to continuously and efficiently filter the drawing liquid for a long time. It is necessary to shut down for maintenance and replace the filter module after a certain period of time, which affects the efficiency of continuous production and prolongs the processing cycle. It cannot be effectively applied to the continuous production scene required for industrial mass production, and periodic shutdown, disassembly and maintenance reduce the overall production efficiency. In addition, existing filtering devices usually utilize the gravity of the drawing liquid itself and long-term static sedimentation to complete the filtering of impurities. Their filtering efficiency is low and cannot meet the output demand of the drawing liquid during the wire drawing process. As a result, a large amount of drawing liquid needs to be pre-loaded in the drawing liquid circulation system or new drawing liquid needs to be continuously injected to ensure the operability of the circulation, which increases the circulation cost. It is impossible to achieve an effective supply balance for the recycling of the drawing liquid while ensuring the filtering effect. Utility Model Content

[0004] The utility model aims to provide a drawing liquid recycling filter device capable of continuously and uninterruptedly performing efficient and high-quality multiple filtrations on the drawing liquid, so as to solve the problems of low filtration efficiency and obvious fluctuations in filtration quality as the filtration structure is used for a long time, thereby preventing continuous and long-term effective filtration.

[0005] The technical solution adopted by the utility model is: a filtering device for recycling drawing liquid, including a columnar shell capable of completing multiple filtration of the drawing liquid in sections, the columnar shell including a coarse filtration shell in the axial upper section, a connecting guide shell in the axial middle section and a fine filtration shell in the axial lower section, wherein a coarse filtration component, an adjustable connecting pipeline and a fine filtration component are respectively arranged in the coarse filtration shell, the connecting guide shell and the fine filtration shell connected in sequence, the coarse filtration component and the fine filtration component purify the drawing liquid by constructing a two-stage filtration structure, and the fine filtration component synchronously completes uninterrupted fine filtration and filter residue cleaning in a zoned filtration manner; the axial upper end face and the axial lower end face of the columnar shell are respectively provided with an inlet and an outlet for limiting the inflow and outflow of the drawing liquid.

[0006] According to a preferred embodiment, the fine filter assembly includes a transverse plug-in rail, a groove plate and a non-woven bag installed in the fine filter housing, wherein the groove plate is detachably plugged into the transverse plug-in rail, thereby cutting off the half-cavity channel defined by the fine filter housing; a plurality of strip grooves are spaced apart on the plate surface of the groove plate, and the non-woven bag is detachably installed in the strip grooves.

[0007] According to a preferred embodiment, the bottom surface of the groove plate is also spaced apart with inflation modules, and the inflation modules are arranged alternately with the strip grooves; the inflation modules include connecting flat tubes, pear-shaped airbags and reciprocating inflation and suction components, wherein the connecting flat tubes and the strip grooves are arranged alternately, and the axial lower end of the connecting flat tube is connected to the pear-shaped airbag connected to its lumen, and the axial upper end of the connecting flat tube is also connected to the reciprocating inflation and suction component.

[0008] According to a preferred embodiment, a positioning step is provided on the groove side wall of the strip-shaped groove, so that the bag opening of the non-woven bag can be limited on the positioning step by a positioning plate sleeve.

[0009] According to a preferred embodiment, the fine filter housing divides its shell cavity into two equal half-cavity channels by a middle partition vertical plate, so that the fine filter components arranged in the two half-cavity channels can work alternately and adjustably.

[0010] According to a preferred embodiment, continuous screening mechanisms of the coarse filter components are staggered and interspersed on two opposite shell walls of the coarse filter shell, so that the wire drawing liquid directionally flowing in the coarse filter shell can flow through multiple coarse filter components in sequence; an air blowing cleaning mechanism capable of cleaning impurities separated and transferred by the continuous screening mechanism and a collection trough for collecting the cleaned impurities are also provided on the outer wall of the coarse filter shell.

[0011] According to a preferred embodiment, the continuous screening mechanism includes guide wheels respectively supported on the outer side and inner side of the coarse filter shell by supporting diagonal rods, and a screening mesh belt mounted on the two guide wheels, wherein the two guide wheels on the outer side and inner side of the coarse filter shell are arranged with a height difference to define the screening mesh belt in an inclined state.

[0012] According to a preferred embodiment, the air blowing cleaning mechanism includes an air storage tank, a supporting air duct, a transverse exhaust pipe and a nozzle installed on the outer wall of the coarse filter housing, wherein the transverse exhaust pipe is arranged between the guide wheel and the shell wall of the coarse filter housing through the supporting air duct connected to the air storage tank, and is transversely placed between two sections of the screening mesh belts which are parallel to each other and are defined by the guide wheel.

[0013] According to a preferred embodiment, the collecting tank is detachably mounted below the horizontal exhaust pipe of the air blowing cleaning mechanism and the portion of the screening mesh belt outside the coarse filter housing to collect impurities swept out by the airflow.

[0014] According to a preferred embodiment, the adjustable connecting pipeline includes a main pipeline connected to the coarse filter housing and two branch pipelines connected through a three-way valve body and connected to the half-cavity channels in parallel.

[0015] The beneficial effects of the utility model are:

[0016] The coarse filter component provided in the present application can realize long-term impurity filtration with high efficiency and good continuous filtration effect by constructing a multi-stage alternating conveyor belt form of impurity continuous filtration and transfer structure. While ensuring the uninterrupted continuous filtration of the drawing liquid to improve the total filtration efficiency and shorten the total filtration time, the filtered impurities are continuously transferred to ensure the filtration effect of the filtration structure. In addition, the staggered multi-stage transmission belt filtration structure can perform multiple filtrations to ensure the filtration accuracy, avoiding the defects of silting or inability to fully filter the large-flow drawing liquid, and the problem that the existing filtration requires regular shutdown maintenance and increases the working time. The fine filter component provided in the present application can highly purify and filter the drawing liquid after the large particle impurities are filtered by the coarse filter component, thereby effectively removing the fine particle impurities. In particular, the fine filter component can improve the efficiency and filtration speed of fine filtration by periodic pressurized filtration, thereby improving the recovery of the drawing liquid per unit time, so as to ensure that the continuous filtration and recovery of the drawing liquid can meet the continuous output supply required for secondary drawing lubrication assistance, and ensure the feasibility of the entire circulation system. In addition, the present application constructs a dual-zone fine filter component, so that the filtering work and the disassembly and maintenance work can be carried out synchronously in different zones through intermittent alternating work, ensuring the efficiency and quality of continuous filtration, avoiding the extra time consumption of downtime maintenance and the defect of reduced filtration quality caused by long-term filtration, thereby ensuring the rate and effect of continuous filtration while also being able to improve the average quality of filtration to a certain extent. The present application performs multiple filtrations on the drawing liquid that completes the auxiliary forming work of the wire drawing process by setting a coarse filter component and a fine filter component, so as to perform efficient and continuous filtration treatment on impurities of different particle sizes in a graded manner, so as to fully meet the supply demand of the drawing liquid for the continuous wire drawing process, and also ensure the purity and recovery efficiency of the drawing liquid recovery and reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a preferred drawing liquid recycling filtering device proposed by the utility model;

[0018] Figure 2 This is a schematic structural diagram of a fine filter assembly of a preferred drawing liquid recycling filter device proposed by the utility model when it is expanded on one side;

[0019] Figure 3 It is a top view of a fine filter assembly of a preferred filter device for recycling drawing liquid proposed by the utility model.

[0020] Reference numerals list

[0021] 1: column housing; 2: coarse filter assembly; 3: adjustable connecting pipeline; 4: fine filter assembly; 5: inlet; 6: outlet; 11: coarse filter housing; 12: connecting guide housing; 13: fine filter housing; 21: continuous screening mechanism; 22: air blowing cleaning mechanism; 23: collecting tank; 31: main pipeline; 32: three-way valve body; 33: branch pipeline; 41: horizontal plug-in track; 42: groove plate; 43: non-woven bag; 44: inflation module; 131: middle partition vertical plate; 211: supporting diagonal rod; 212: guide wheel; 213: screening mesh belt; 221: air storage tank; 222: supporting air guide pipe; 223: horizontal exhaust pipe; 224: nozzle; 421: strip groove; 422: positioning step; 423: positioning plate sleeve; 441: connecting flat tube; 442: pear-shaped air bag; 443: reciprocating charging and suction piece. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] The technical solution provided by the present invention will be described in detail below by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is used to help understand the present invention, but does not constitute a limitation of the present invention. In some examples, some implementation methods are not described or are not described in detail because they belong to existing or conventional technologies.

[0024] In addition, the technical features recorded in this article, or the steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the steps or operation sequence of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is only for illustrative purposes and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0025] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, under reasonable circumstances (not constituting a self-contradiction), include direct and indirect connections (couplings).

[0026] The following is a detailed description with reference to the accompanying drawings.

[0027] Example 1

[0028] The present application provides a filtering device for recycling drawing liquid, which includes a column housing 1, a coarse filtering component 2, an adjustable connecting pipeline 3, a fine filtering component 4, an inlet 5 and an outlet 6.

[0029] according to Figure 1-3A specific embodiment is shown, in which the cylindrical shell 1 performs multiple filtrations on the drawing liquid that completes the auxiliary work of drawing by constructing a variety of filtering structures in its shell cavity in sections. The cylindrical shell 1 is provided with a coarse filtering component 2, an adjustable connecting pipeline 3 and a fine filtering component 4 connected in sequence in sections. The coarse filtering component 2 and the fine filtering component 4 purify the drawing liquid by constructing a two-stage filtering structure. The coarse filtering component 2 realizes continuous and uninterrupted filtration of the drawing liquid by setting a filtering structure for continuous filter residue transfer, thereby ensuring the filtering effect, and it ensures multiple effective filtration of the drawing liquid with a large flow rate by setting a plurality of staggered transmission filtering structures, further ensuring the filtering effect. The fine filtering component 4 simultaneously completes uninterrupted fine filtration and filter residue cleaning in a partition filtering manner, thereby realizing continuous filtration and improving the continuous filtration efficiency and quality. The axial upper end face and the axial lower end face of the cylindrical shell 1 are respectively provided with an inlet 5 and an outlet 6 for limiting the inflow and outflow of the drawing liquid. The present application performs multiple filtrations on the wire drawing liquid that completes the auxiliary forming work of the wire drawing process by setting a coarse filter component 2 and a fine filter component 4, so as to perform efficient and continuous filtration treatment on impurities of different particle sizes in a graded manner, so as to fully meet the supply demand of the wire drawing liquid for the continuous wire drawing process, and also ensure the purity and recovery efficiency of the wire drawing liquid recycling and reuse. The coarse filter component 2 set in the present application constructs a continuous impurity filtration and transfer structure in the form of a multi-stage alternating conveyor belt, so that it can achieve efficient and continuous long-term impurity filtration with good filtering effect. While ensuring the uninterrupted continuous filtration of the wire drawing liquid to improve the total filtration efficiency and shorten the total filtration time, it also continuously transfers the filtered impurities, ensuring the filtering effect of the filtering structure. In addition, the staggered multi-stage transmission belt filtration structure can perform multiple filtrations to ensure the filtering accuracy, avoiding the defects of silting or inability to fully filter the large flow wire drawing liquid, and the problem that the existing filtration requires regular shutdown maintenance and increases the working time. The fine filter component 4 set in the present application can highly purify and filter the wire drawing liquid after the large particle impurities are filtered by the coarse filter component 2, thereby effectively removing fine particle impurities. In particular, the fine filter assembly 4 can improve the efficiency and filtering speed of fine filtering by periodic pressure filtering, thereby increasing the recovery of the drawing liquid per unit time, so as to ensure that the continuous filtering and recovery of the drawing liquid can meet the continuous output supply required for secondary drawing lubrication assistance, and ensure the feasibility of the entire circulation system. In addition, the present application constructs the fine filter assembly 4 in two zones, so that the filtering work and the disassembly and maintenance work can be carried out synchronously in different zones through intermittent alternating work, ensuring the efficiency and quality of continuous filtering, avoiding the extra time consumption of downtime maintenance and the defect of reduced filtering quality caused by long-term filtering, thereby ensuring the rate and effect of continuous filtering while also being able to improve the average quality of filtering to a certain extent.

[0030] Preferably, the column housing 1 comprises a coarse filter housing 11 in the upper axial section, a connecting guide housing 12 in the middle axial section, and a fine filter housing 13 in the lower axial section. Preferably, a coarse filter assembly 2, an adjustable connecting pipeline 3, and a fine filter assembly 4 are respectively arranged in the coarse filter housing 11, the connecting guide housing 12, and the fine filter housing 13 connected in sequence. Preferably, the fine filter housing 13 is divided into two equal half-cavity channels 131 by a middle partition vertical plate 132, so that the fine filter assembly 4 arranged in the two half-cavity channels 131 can work alternately and adjustable.

[0031] Preferably, continuous screening mechanisms 21 of the coarse filtering components 2 are staggered and spaced on two opposite shell walls of the coarse filtering housing 11, so that the wire drawing liquid that flows directionally in the coarse filtering housing 11 can flow through multiple coarse filtering components 2 in sequence. Preferably, an air blowing cleaning mechanism 22 that can clean the impurities separated and transferred by the continuous screening mechanism 21 and a collection tank 23 that collects the cleaned impurities are also provided on the outer side wall of the coarse filtering housing 11. Preferably, through openings are alternately spaced on two opposite side surfaces of the coarse filtering housing 11 to facilitate the continuous screening mechanism 21 to be partially inserted into the shell cavity.

[0032] Preferably, the continuous screening mechanism 21 includes a guide wheel 212 supported by a support inclined rod 211 on the outside and inside of the coarse filter housing 11, and a screening mesh belt 213 sleeved on the two guide wheels 212. Preferably, the two guide wheels 212 on the outside and inside of the coarse filter housing 11 are arranged in a manner with a height difference to define the screening mesh belt 213 in an inclined state. Preferably, the two guide wheels 212 on the outside of the coarse filter housing 11 are connected to the driving motor on the support inclined rod 211 to drive the screening mesh belt 213 to rotate in a directional manner. Preferably, the belt body of the screening mesh belt 213 is made of a filter mesh with a filter mesh hole of a certain size, so that impurities with larger particle sizes in the drawing liquid can be effectively screened out. Further preferably, the screening mesh belt 213 is provided with interception mesh plates at intervals in the length direction of the belt body to ensure effective interception and transfer of impurities.

[0033] Preferably, the air blowing cleaning mechanism 22 comprises an air storage tank 221, a supporting air duct 222, a horizontal exhaust pipe 223 and a nozzle 224 mounted on the outer side wall of the coarse filter housing 11. Preferably, the horizontal exhaust pipe 223 is arranged between the guide wheel 212 and the shell wall of the coarse filter housing 11 through the supporting air duct 222 connected to the air storage tank 221, and is horizontally arranged between two sections of screening mesh belts 213 that are parallel to each other and are limited by the guide wheel 212, so that the nozzle 224 to be arranged on its pipe body can adjustably spray the cleaning airflow to the part of the screening mesh belt 213 below it. Preferably, high-pressure nitrogen is stored in the air storage tank 221. Preferably, the supporting air duct 222 can locate the position of the horizontal exhaust pipe 223 and connect multiple horizontal exhaust pipes 223 at intervals on its pipe body. Further preferably, a switch valve is arranged in the supporting air duct 222 to limit the output of the airflow. Preferably, a plurality of transverse exhaust pipes 223 on one side of the coarse filter housing 11 are connected in parallel.

[0034] Preferably, the collecting tank 23 is detachably installed below the horizontal exhaust pipe 223 of the air blowing cleaning mechanism 22 and the partial screening mesh belt 213 outside the coarse filtering housing 11 to collect the impurities swept out by the airflow.

[0035] Preferably, the adjustable connecting pipeline 3 includes a main pipeline 31 connected to the coarse filter housing 11 and two branch pipelines 33 connected to the parallel half-cavity channels 131 through a three-way valve body 32 .

[0036] Preferably, the fine filter assembly 4 comprises a transverse plug-in track 41, a groove plate 42 and a non-woven bag 43 installed in the fine filter housing 13. Preferably, the groove plate 42 is detachably plugged into the transverse plug-in track 41, thereby truncating the half-cavity channel 131 defined by the fine filter housing 13. Preferably, a plurality of strip grooves 421 are spaced apart on the plate surface of the groove plate 42, and the non-woven bag 43 is detachably installed in the strip grooves 421. Preferably, the bottom surface of the groove plate 42 is also spaced apart with an inflation module 44, and the inflation module 44 is alternately arranged with the strip grooves 421. Preferably, a positioning step 422 is provided on the side wall of the strip groove 421, so that the bag mouth of the non-woven bag 43 can be limited on the positioning step 422 through the positioning plate sleeve 423, so that the drawing liquid flowing into the strip groove 421 can flow into the non-woven bag 43, and then the fine particle impurities in the drawing liquid are filtered through the non-woven layer. Preferably, the positioning plate sleeve 423 includes an annular plate body that can fit with the positioning step 422 and a convergence tube body perpendicular to the annular plate body. Preferably, the bag mouth of the non-woven bag is pressed and positioned on the positioning step 422 by a positioning screw or other structure on the annular plate body. Further preferably, when the bag body of the non-woven bag 43 is inserted into the strip groove 421 and extends to the bottom of the strip groove 421, the converging tube body is inserted into the unfolded bag mouth of the non-woven bag 43, thereby guiding the drawing liquid connected by the groove plate 42 and flowing into the strip groove 421 to flow into the non-woven bag 43.

[0037] Preferably, the inflation expansion module 44 includes a connecting flat tube 441, a pear-shaped airbag 442 and a reciprocating suction member 443. Further preferably, the connecting flat tube 441 and the strip groove 421 are arranged alternately, and the axial lower end of the connecting flat tube 441 is connected to a pear-shaped airbag 442 connected to its lumen. Preferably, the axial upper end of the connecting flat tube 441 is also connected to a reciprocating suction member 443 to drive the pear-shaped airbag 442 to expand periodically and squeeze the non-woven bag 43, thereby accelerating the filtration rate of the non-woven bag 43 for the drawing liquid contained therein. Specifically, when two adjacent pear-shaped airbags 442 expand, they compress the occupied space of the non-woven bag 43 so that the non-woven bag 43 is squeezed and the filtration of the drawing liquid is accelerated. When the pear-shaped airbag 442 blocks the middle bag body of the non-woven bag 43, it is mainly filtered and separated through the lower bag body, and the partition-type extrusion can ensure that the drawing liquid in the lower bag body can only be transferred outward through the non-woven layer, thereby achieving effective pressurized filtration. Preferably, the reciprocating suction member 443 can be a hydraulic drive rod that drives the plug body to reciprocate in the tube body to drive the reciprocating input and output of the gas, or it can be a motor screw guide structure that drives the screw to drive the plug body to reciprocate in the tube body to change the size of the closed tube cavity, thereby achieving the reciprocating input and output of the tube cavity gas. Further preferably, the main structure of the reciprocating filling and suction member 443 can be a syringe-like syringe-like syringe and piston mechanism, wherein the driving end of the piston outputs power through a reciprocating translation axis or a reciprocating telescopic hydraulic rod, thereby continuously and reciprocatingly changing the size of the inner space chamber defined by the cylinder and the piston, so as to periodically drive the pear-shaped airbag 442 to expand and contract, and then periodically pressurize the non-woven bag 43 to promote its filtration of the drawing liquid.

[0038] The present utility model is not limited to the above optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope of the claims of the present utility model fall within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute limitations on the claims. The protection scope of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A filtration device for recycling drawing liquid, comprising a cylindrical housing (1) capable of performing multiple filtration of the drawing liquid in sections, characterized in that: The column housing (1) comprises a coarse filter housing (11) in an axially upper section, a connecting guide housing (12) in an axially middle section, and a fine filter housing (13) in an axially lower section, wherein: A coarse filter assembly (2), an adjustable connecting pipeline (3) and a fine filter assembly (4) are respectively arranged in the coarse filter housing (11), the connecting guide housing (12) and the fine filter housing (13) which are connected in sequence. The coarse filter assembly (2) and the fine filter assembly (4) purify the wire drawing liquid by constructing a double-stage filtering structure, and the fine filter assembly (4) simultaneously completes uninterrupted fine filtering and filter residue cleaning in a partition filtering manner; The axial upper end surface and the axial lower end surface of the cylindrical shell (1) are respectively provided with an inlet (5) and an outlet (6) for limiting the inflow and outflow of the drawing liquid.

2. The drawing liquid recycling filtering device according to claim 1, characterized in that: The fine filter assembly (4) comprises a transverse plug-in rail (41), a groove plate (42) and a non-woven bag (43) installed in the fine filter housing (13), wherein: The groove plate (42) is detachably plugged into the transverse plug-in rail (41), thereby cutting off the half-cavity channel (131) defined by the fine filter housing (13); A plurality of strip-shaped grooves (421) are arranged at intervals on the plate surface of the groove plate (42), and the non-woven fabric bag (43) is detachably installed in the strip-shaped grooves (421).

3. The drawing liquid recycling filtering device according to claim 2, characterized in that: The bottom surface of the groove plate (42) is also provided with inflation modules (44) at intervals, and the inflation modules (44) are arranged alternately with the strip grooves (421); The inflation module (44) comprises a connecting flat tube (441), a pear-shaped air bag (442) and a reciprocating inflating and sucking member (443), wherein the connecting flat tube (441) and the strip-shaped groove (421) are arranged alternately. The axial lower end of the connecting flat tube (441) is connected to the pear-shaped air bag (442) which is in communication with its lumen, and the axial upper end of the connecting flat tube (441) is also in communication with the reciprocating suction and filling member (443).

4. The drawing liquid recycling filtering device according to claim 3, characterized in that: A positioning step (422) is provided on the groove side wall of the strip-shaped groove (421), so that the bag opening of the non-woven bag (43) can be limited on the positioning step (422) through the positioning plate sleeve (423).

5. The drawing liquid recycling filtering device according to claim 4, characterized in that: The fine filter housing (13) divides its housing cavity into two equal half-cavity channels (131) through a middle partition vertical plate (132), so that the fine filter components (4) arranged in the two half-cavity channels (131) can work alternately and adjustably.

6. The drawing liquid recycling filtering device according to claim 5, characterized in that: The continuous screening mechanisms (21) of the coarse filtering components (2) are arranged alternately and spaced apart on two opposite shell walls of the coarse filtering housing (11), so that the wire drawing liquid flowing directionally in the coarse filtering housing (11) can flow through the plurality of coarse filtering components (2) in sequence; An air blowing cleaning mechanism (22) capable of cleaning the impurities separated and transferred by the continuous screening mechanism (21) and a collecting tank (23) for collecting the cleaned impurities are also provided on the outer side wall of the coarse filtering housing (11).

7. The drawing liquid recycling filtering device according to claim 6, characterized in that: The continuous screening mechanism (21) comprises guide wheels (212) respectively supported on the outer side and the inner side of the coarse filtering housing (11) by supporting inclined rods (211), and a screening mesh belt (213) sleeved on the two guide wheels (212), wherein: The two guide wheels (212) located on the outer side and the inner side of the coarse filtering housing (11) are arranged in a manner with a height difference to define the screening mesh belt (213) in an inclined state.

8. The drawing liquid recycling filtering device according to claim 7, characterized in that: The blowing The cleaning mechanism (22) comprises an air storage tank (221) mounted on the outer side wall of the coarse filtering housing (11), a supporting air guide pipe (222), a horizontal exhaust pipe (223) and a nozzle (224), wherein: The transverse exhaust pipe (223) is disposed between the guide wheel (212) and the shell wall of the coarse filtering housing (11) through a supporting air guide pipe (222) connected to the air storage tank (221), and is transversely disposed between two sections of the screening mesh belt (213) which are parallel to each other and are defined by the guide wheel (212).

9. The drawing liquid recycling filtering device according to claim 8, characterized in that: The collecting tank (23) is detachably mounted below the horizontal exhaust pipe (223) of the air blowing cleaning mechanism (22) and the portion of the screening mesh belt (213) outside the coarse filtering housing (11) to collect impurities swept out by the airflow.

10. The drawing liquid recycling filtering device according to claim 9, characterized in that: The adjustable connecting pipeline (3) comprises a main pipeline (31) connected to the coarse filter housing (11) and two branch pipelines (33) connected to the half-cavity channels (131) in parallel and respectively connected via a three-way valve body (32).

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