Filter pressing cloth type oil filter

Abstract

A filter pressing cloth type oil filter comprises a filter tank, an oil storage tank, filter cloth, a filter cloth conveying device and a control box, the filter tank is located on the oil storage tank, and the filter tank is communicated with the oil storage tank through a middle oil filter opening; an oil inlet is formed in the top of the filter box, an oil outlet is formed in the bottom of the oil storage box, the control box is electrically connected with the filter box, the oil storage box and the filter cloth conveying device, and the oil filter is characterized in that a filter plate is arranged in the filter box, the filter plate is a latticed flat plate, the filter plate is obliquely fixed in the filter box, and the filter box is divided into two mutually isolated spaces by the filter plate; the filter cloth conveying device enables the filter cloth to be tightly attached to the box wall of the filter box and tightly and flatly cover the upper surface of the filter plate, and the filter cloth conveying device enables the filter cloth to move from bottom to top along the upper surface of the filter plate. The filter cloth conveying device and the inclined filter plate are adopted, so that the problems of waste oil side leakage and large oil loss are solved, and the filter has the characteristics of simple structure, good filter effect, high automation degree, convenience in production and manufacturing and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste oil processing technical field, concretely relates to a filter press cloth type oil filter. BACKGROUND

[0002] Filtering is an economical and convenient method for removing solid impurities in industrial waste oil. The commonly used filtering device is generally a sealed multi-layer filter screen or filter core structure. Since the solid impurities in industrial waste oil are generally more, and the waste oil is relatively viscous, the multi-layer filter screen and filter core will deposit a large amount of impurities in a short time, causing the industrial waste oil to be blocked, resulting in the inability of the industrial waste oil to flow in the filtering device, and the inability to achieve a good filtering effect during the long-term recycling process of the industrial waste oil. Even if the blocked solid impurities are scraped off from the filter screen or filter core during the filtering process, the solid impurities will quickly block the multi-layer filter screen and filter core under the flow of waste oil, and a good scraping and cleaning effect cannot be achieved, requiring frequent replacement of the filter screen and filter core.

[0003] The patent document CN116966651B provides a waste oil treatment device and method, specifically discloses a waste oil treatment device, which comprises a treatment box; a filter cloth is arranged in the treatment box, the filter cloth is provided with a cleaning part, the cleaning part is provided with a first filter part and a second filter part, the first filter part is located directly above the second filter part; the impurity removal mechanism has a sliding plate, a receiving box, two partitions and two groups of driving members; the waste oil treatment device of the present application adds waste oil to the filter cloth, controls the movement of the first rotating rod and the receiving box, and the movement of the first rotating rod and the receiving box makes the supported cleaning part move on the filter cloth. During this period, the waste oil falling onto the cleaning part will be filtered through the first filter part, and the filtered impurity-free oil will pass through the second filter part. The impurities on the second filter part are back-flushed downward to make the impurities fall off the second filter part and collect in the receiving groove, preventing the impurities in the waste oil from blocking the filter screen and avoiding the reduction of waste oil filtration speed. The technical solution provided by the patent document mainly relies on back-flushing the second filter part with filtered impurity-free oil to clean the impurities, and the effect of automatic impurity removal is limited. There is still a problem of impurity accumulation and blockage of the filter cloth during long-term operation, especially when the solid impurity content in the waste oil is high. Even if the movement speed of the impurity removal mechanism is increased, there is still a problem of impurity accumulation and blockage of the filter cloth. Moreover, there is a problem of difficulty in replacing the filter cloth. The patent document CN112008606B provides a grinding machine oil line filtration system. The patent document discloses a way of multiple filtration and purification of cutting oil through sedimentation, primary filtration and secondary filtration. The secondary filtration mechanism includes a box body, a filter cloth above the box body for filtering waste oil, one end of the filter cloth wound on a unwinding drum, the other end wound on a winding drum, the unwinding drum and the winding drum rotatably arranged on the top of the box body, a distributor above the filter cloth connected to the primary filtration mechanism, the distributor uniformly distributing the waste oil onto the filter cloth for filtration, and then falling into the box. The secondary filtration mechanism adopts a filter cloth conveying method, which solves the problem of difficulty in replacing the filter cloth. However, when the solid impurity content in the waste oil is high, there is still a problem of blockage of the filter cloth. The oil loss problem caused by the waste oil not being filtered in time and being taken out by the filter cloth. In the patent document, a primary filtration mechanism is used to filter, which greatly reduces the particle content and particle size required by the filter screen of the secondary filtration mechanism, reduces the filtration burden of the filter screen, and improves the filtration speed of the filter screen. The circulating flow of the cutting oil is maintained at a high speed, solving the problem of reduced waste oil filtration speed caused by impurities blocking the filter screen. In addition, in the patent document, the filter cloth edge is not fixedly contacted, and the waste oil may leak directly from the edge to the box below without being filtered, causing the problem of side leakage of waste oil during filter cloth conveying, affecting the quality of the filtered oil. Utility model content

[0004] In order to overcome the prior art, the utility model provides a filter press cloth type oil filter, solve the problem and the problem of big oil product loss of filter cloth transmission process in the prior art, it has the advantages of simple structure, high degree of automation, easy production and manufacture.

[0005] A filter press cloth type oil filter, including filter box, oil tank, filter cloth, filter cloth conveying device and control box, filter box is located on the oil tank, and filter box and oil tank are communicated through the middle filter oil port, the top of filter box is equipped with oil inlet, the bottom of oil tank is equipped with oil outlet, control box is electric connection with filter box, oil tank, filter cloth conveying device, its characterized in that: filter box is equipped with filter plate, filter plate is grid-like flat plate, filter plate is fixed in filter box, filter plate divides filter box into two mutually isolated spaces, filter cloth conveying device makes filter cloth closely adhere to filter box wall and closely flat on filter plate upper surface, and make filter cloth move from below to above along filter plate upper surface.

[0006] The working principle of the utility model is: when waste oil flows into the filter box from the oil inlet on the top of the filter box, the clean oil filtered by the filter cloth flows into the lower part of the filter box, is collected in the oil tank through the filter oil port, and finally flows out of the oil tank through the oil outlet, the solid impurities are left on the filter cloth, and the filter cloth conveying device drives the filter cloth to move from below to above along the filter plate to the front end of the filter box, and the solid impurities adhered to the surface of the filter cloth are taken out of the filter box together. The utility model adopts the filter cloth conveying mode to directly remove the solid impurities, ensures the filtering speed while taking away the solid impurities, and ensures the filtering efficiency under complex environment; the filter cloth conveying device and the inclined filter plate are adopted, in the waste oil filtering process, the filter cloth is always closely attached to the filter plate in the rolling conveying process by using the waste oil flow rate and the gravity effect, the waste oil side leakage problem in the prior art is solved, and the waste oil remaining on the filter cloth flows to the bottom of the filter plate, so that the oil product loss is reduced.

[0007] Further, the filter cloth conveying device includes a feeding structure, a pressing plate, a winding structure, and a roller. The feeding structure is located at the rear end of the filter box, and the winding structure is located at the front end of the filter box. The filter cloth is connected to the feeding structure and the winding structure. The pressing plate is detachably fixed to the rear end of the filter box. The pressing plate is in close contact with the inner side of the filter box on both sides and close to the rear wall of the filter box. The pressing plate presses the filter cloth along the rear wall of the filter box to the bottom of the filter plate. The pressing plate and the roller make the filter cloth closely flat on the upper surface of the filter plate. The pressing plate in this structure is detachably fixed in the filter box. When the filter cloth is replaced, the cloth head of the newly replaced filter cloth reel can be quickly passed through the filter box after the pressing plate is detached. The filter cloth is pressed along the axial direction to the bottom of the filter plate by pressing the pressing plate along the rear wall of the filter box, so that the filter cloth is flatly attached to the surface of the filter plate.

[0008] Further, the filter box is further provided with a negative pressure device, which is a negative pressure fan, the air outlet of the negative pressure fan is located at the lower end of the filter plate, and the air inlet of the negative pressure fan is located at the upper end of the filter plate, so that the upper part of the filter plate becomes a high-pressure area, and the lower part of the filter plate becomes a negative pressure area, which not only helps the filter cloth to be tightly attached to the filter plate, but also helps to increase the coverage range of the waste oil on the filter cloth when falling, and accelerates the filtering speed.

[0009] Further, the air outlet of the negative pressure fan is arranged at the front end of the filter box close to the filter plate, so as to avoid that when the filter box is at a high liquid level, the oil is sucked into the fan pipeline.

[0010] Further, the air inlet of the negative pressure fan is further provided with a wind guide part, the bottom of the wind guide part is a grid-shaped flat plate inclined to the oil inlet direction, which helps to uniformly send the air at the air inlet into the filter box, so as to diffuse and distribute the waste oil falling from the oil inlet on the filter cloth, accelerate the filtering speed, and blow the waste oil remaining on the filter cloth to the bottom of the filter plate, thereby reducing the oil loss.

[0011] Further, the oil inlet at the top of the filter box is further provided with an oil inlet cavity, the bottom of the oil inlet cavity is an inclined grid plate, and the lowest part of the inclined surface is provided with an empty oil return part, which is beneficial to uniformly distribute and evenly spray the waste oil on the inclined filter cloth after the waste oil flows into the oil inlet cavity from the oil inlet, thereby improving the filtering efficiency.

[0012] Further, the oil inlet is located above the middle part of the filter plate.

[0013] Further, a baffle is arranged at the front end of the filter box, and a waste residue box is further arranged below the winding structure, the filter cloth is folded towards the conveying along the bottom end of the baffle, so that the path of the filter cloth conveying from the filter box to the winding structure becomes a broken line at the bottom end of the baffle, and at the broken point, the bottom of the baffle scrapes the back of the filter cloth, which helps to scrape the solid impurities adhering to the surface of the filter cloth and drop into the waste residue box below.

[0014] Further, the winding structure comprises a winding roller and a travel switch, the travel switch is pressed against the surface of the winding roller, and when the travel switch sends a low-position alarm signal of the winding roller, the control box controls the filter cloth conveying device to stop winding the filter cloth, reminding the operator to replace a new filter cloth roller.

[0015] Further, the winding structure comprises a winding roller and a stepping motor driving the winding roller to rotate, the filter box is further provided with a float ball sensor one, and the oil inlet is further connected with an oil inlet pump; when the float ball sensor one triggers a high liquid level alarm of waste oil in the filter box, the control box controls the stepping motor to start and drive the winding roller to rotate, the filter cloth on the filter plate is replaced, and the oil inlet pump is controlled to stop working; when the float ball sensor one triggers a low liquid level alarm of waste oil in the filter box, the control box controls the oil inlet pump to start, and the waste oil flows into the filter box through the oil inlet pipe; the structure automatically adjusts the oil inlet and filter cloth conveying speed according to the waste oil filtering speed, and ensures efficient filtering.

[0016] Further, the two float ball sensors one on the filter box are independently applied to control the filter cloth conveying device and the oil inlet pump respectively, and safe working of the device is ensured.

[0017] Further, the oil storage tank is further provided with a float ball sensor two, and the oil storage tank is further connected with an oil outlet pump; when the float ball sensor two triggers a high liquid level alarm or a low liquid level alarm of the oil storage tank, the control box controls the oil outlet pump to start or stop working.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] 1. The filter plate is arranged obliquely, and the upper and lower parts of the filter box are completely isolated; when the surface of the filter cloth is blocked and the waste oil cannot be filtered in time, the residual waste oil automatically flows to the bottom area of the filter plate, so that the problems of residual waste oil overflow, high residual oil content in the filter cloth winding drum and large oil loss are solved.

[0020] 2. The filter cloth conveying device is adopted to tightly and evenly convey the filter cloth on the filter plate from bottom to top, the gravity and flow rate of the waste oil are utilized to tightly adhere the filter cloth to the filter plate during the movement, and the problem of waste oil side leakage is solved.

[0021] 3. The negative pressure device is adopted to further tightly press the filter cloth on the filter plate, so that the problem of waste oil side leakage during the filter cloth conveying process is better solved, and the waste oil filtering speed is accelerated.

[0022] 4. The pressing plate is adopted to press the filter cloth to the bottom of the filter plate by tightly abutting the rear side tank wall of the filter box, so that the risk of waste oil leakage into the oil storage tank through the gap formed between the filter cloth and the rear side tank wall of the filter box when the filter cloth is conveyed downward to the bottom of the filter box is eliminated; and the pressing plate adopts a detachable fixing mode, so that the filter cloth replacement is facilitated.

[0023] 5. The filter cloth conveying device and the inclined filter plate are combined with liquid level detection, and the filter cloth is automatically conveyed according to the filtering speed, so that the problem that the filter cloth conveying mode can be used for filtering only after pretreatment in the prior art is solved, and the degree of automation is high, and the structure is simple. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Fig. 5 is a right side perspective view of a filter press cloth type oil filter;

[0025] Figure 2 Fig. 6 is a left side perspective view of a filter press cloth type oil filter;

[0026] Figure 3 Fig. 7 is a schematic view of a filter cloth conveying device;

[0027] Figure 4 Fig. 8 is an enlarged view of point A;

[0028] 1. filter box; 2. oil storage tank; 3. filter plate; 4. filter cloth conveying device; 5. filter cloth; 6. control box; 7. negative pressure fan; 8. baffle; 9. waste residue tank;

[0029] 101. oil inlet; 102. oil filtering outlet; 103. oil inlet cavity; 104. oil return part; 105. oil inlet pipe; 106. oil inlet pump; 107. float ball sensor I; 201. oil outlet; 202. oil outlet pump; 203. float ball sensor II; 204. oil outlet pipe; 401. feeding structure; 402. pressing plate; 403. winding structure; 404. roller; 405. travel switch; 406. winding roller; 407. feeding roller; 408. stepping motor; 701. air inlet; 702. air outlet; DETAILED DESCRIPTION

[0030] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, the same or similar components are designated by the same or similar reference numerals, and the description thereof will not be repeated. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples of devices and methods consistent with some aspects of the present embodiments as detailed in the appended claims.

[0031] It should be noted that all directional indications, such as upper, lower, left, right, front, back, etc., are used to explain the relative position relationship, movement condition, etc. between components in a certain posture, such as shown in the drawings, and if the certain posture changes, the directional indications will also change accordingly.

[0032] In addition, the description such as "first", "second" and the like in the embodiments is only for the purpose of description, and is not intended to particularly indicate the order or sequence, nor to limit the present application, which is merely to distinguish components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0033] In order to further understand the content, characteristics and effects of the present application, the following embodiments are exemplified and described in detail as follows with reference to the accompanying drawings:

[0034] As shown in Figure 1 , Figure 2 and Figure 3 , a filter cloth type oil filter, comprising a filter box 1, an oil storage tank 2, a filter cloth 5, a filter cloth conveying device 4 and a control box 6, the filter box 1 is located on the oil storage tank 2, and the filter box 1 and the oil storage tank 2 are communicated through the intermediate oil filter port 102; the filter box top is provided with an oil inlet 101, the oil storage tank 2 bottom is provided with an oil outlet 201, the control box 6 is electrically connected with the filter box 1, the oil storage tank 2 and the filter cloth conveying device 4, the filter box 1 is provided with a filter plate 3, the filter plate 3 is a grid-shaped flat plate, the filter plate 3 is fixedly arranged in the filter box 1, and the filter plate 3 divides the filter box 1 into two mutually isolated spaces; the filter cloth conveying device 4 comprises a feeding structure 401, a pressing plate 402, a winding structure 403 and a roller 404, the feeding structure 401 is located at the rear end of the filter box 1, the winding structure 403 is located at the front end of the filter box 1, one end of the filter cloth 5 is connected with the feeding structure, the other end is connected with the winding structure, the filter cloth 5 passes through the inside of the filter box 1 through the roller 404, the pressing plate 402 is located at the rear end of the filter box 1, the pressing plate 402 is in close contact with the inner side of the filter box 1 on both sides and close to the rear wall of the filter box 1, the pressing plate 402 presses the filter cloth 5 along the rear wall of the filter box 1 to the bottom of the filter plate 3, and the pressing plate 402 and the roller 404 together make the filter cloth 5 tightly and flatly cover on the filter plate 3, when the winding structure rotates, the filter cloth 5 is driven to move along the filter plate 3 from bottom to top.

[0035] The pressure plate 402 is detachably fixed inside the filter box 1. When the filter cloth 5 needs to be replaced, removing the pressure plate 402 helps to quickly pass the end of the new filter cloth roll through the filter box 1. By pressing the pressure plate 402 down along the rear wall of the filter box 1, the filter cloth 5 is quickly and evenly pressed to the bottom of the filter plate 3 in the axial direction, thus ensuring that the filter cloth 5 is flatly attached to the surface of the filter plate 3. In addition, after using tape or other methods to stick the end of the old filter cloth 5 and the end of the new filter cloth 5 together in the axial direction of the filter cloth 5, the filter cloth 5 can be manually pulled forward to easily complete the replacement of the old and new filter cloth 5.

[0036] The filter box 1 is also equipped with a negative pressure device, which is a negative pressure fan 7. The air outlet 702 of the negative pressure fan 7 is located at the lower end of the filter plate 3, and the air inlet 701 of the negative pressure fan 7 is located at the upper end of the filter plate 3. This structure makes the area above the filter plate 3 a high-pressure area and the area below the filter plate 3 a negative-pressure area. This not only helps the filter cloth 5 to adhere tightly to the filter plate 3, but also helps to increase the coverage area of ​​the waste oil on the filter cloth 5 when it falls, thus accelerating the filtration speed.

[0037] The air outlet 702 of the negative pressure fan 7 is located at the front end of the filter box 1 near the filter plate 3 to prevent oil from being sucked into the fan pipe when the filter box 1 is at a high liquid level.

[0038] The negative pressure fan 7 is also provided with an air guide 703 at the air inlet 701. The bottom of the air guide 703 is a grid-shaped plate inclined towards the oil inlet 101. The grid-shaped plate helps to quickly and evenly send the air at the air inlet 701 into the filter box 1, so that the waste oil falling from the oil inlet 101 is diffused and distributed on the filter cloth 5, which speeds up the filtration speed. It also helps to blow the waste oil remaining on the filter cloth 5 to the bottom of the filter plate 3, reducing oil loss.

[0039] like Figure 4 As shown, an oil inlet chamber 103 is also provided at the oil inlet 101 at the top of the filter box 1. The bottom of the oil inlet chamber 103 is an inclined grid plate, and the lowest point of the inclined surface is provided with an empty bottom oil return section 104. This structure is conducive to the waste oil flowing from the oil inlet 101 into the oil inlet chamber 103, and the waste oil is evenly distributed and sprayed onto the inclined filter cloth 5 at the same speed, thereby improving the filtration efficiency.

[0040] When the oil inlet 101 is located at the upper middle position of the filter plate 3, the filtration effect is optimal and the oil loss is minimal.

[0041] A baffle 8 is provided at the front end of the filter box 1, and a waste residue box 9 is provided below the winding structure 403. After the filter cloth 5 is conveyed to the bottom of the baffle 8, it is folded and conveyed to the winding structure 403. This structure makes the path of the filter cloth 5 from the filter box 1 to the winding structure 403 become a fold line at the bottom of the baffle 8. At the fold point, the baffle 8 scrapes across the back of the filter cloth 5, scraping off the solid impurities stuck to the surface of the filter cloth 5 and dropping them into the waste residue box 9 below.

[0042] The feeding structure 401 comprises a feeding roller 407 and a stroke switch 405, the stroke switch 405 is attached to the surface of the feeding roller 407, when the stroke switch 405 detects the low position alarm signal of the feeding roller 407, the control box 6 controls the filter cloth conveying device 4 to stop winding the filter cloth, reminding the operator to replace the new filter cloth roller.

[0043] The winding structure 403 comprises a winding roller 406 and a step motor 408 driving the winding roller 406 to rotate.

[0044] The filter box 1 is further provided with a floating ball sensor 107, and the oil inlet 101 is further connected with an oil inlet pump 106, when the floating ball sensor 107 triggers the high liquid level alarm of waste oil in the filter box 1, the control box 6 controls the step motor 408 to start and drive the winding roller 406 to rotate, and controls the oil inlet pump 106 to stop working; when the floating ball sensor 107 triggers the low liquid level alarm of waste oil in the filter box 1, the control box 6 controls the oil inlet pump 106 to start, and the waste oil flows into the filter box 1 through the oil inlet pipe 105, so that the oil inlet and the filter cloth conveying speed are automatically adjusted according to the waste oil filtering speed, and high-efficiency filtering is ensured.

[0045] The two floating ball sensors 107 on the filter box are independently applied to control the step motor 408 of the filter cloth conveying device 4 and the oil inlet pump 106, so that the step motor 408 and the oil inlet pump 106 can work safely.

[0046] The oil storage tank 2 is further provided with a floating ball sensor 203, and the oil storage tank 2 is further connected with an oil outlet pump 202, when the floating ball sensor 203 triggers the high liquid level alarm or the low liquid level alarm of the oil storage tank 2, the control box 6 controls the oil outlet pump 202 to start or stop working.

[0047] The working principle of the utility model is as follows:

[0048] In the initial state, the filter cloth 5 is pre-wound on the feeding roller 407, enters the filter box 1 through the roller 404, is pressed to the bottom of the filter plate 3 by the pressing plate 402, reaches the front end of the filter box 1 along the filter plate 3, and then reaches the winding roller 406, and the filter cloth 5 is tightly pressed on the filter plate 3 by the pressing plate 402 and the roller 404.

[0049] After entering the working state, the control box 6 drives the oil inlet pump 106 to work, waste oil enters the filter box 1, and is sprayed on the lower half of the filter cloth 5, the waste oil flows into the oil storage tank 2 after being filtered by the filter cloth 5, and the waste oil that cannot be filtered flows into the bottom area of the filter plate 3, when the filter cloth 5 is seriously blocked, the liquid level of the waste oil in the filter box 1 rises to a high liquid level, the float ball sensor one 107 triggers a high liquid level alarm, the control box 6 stops the oil inlet pump 106 from working, stops the oil inlet, and starts the stepping motor 408 to drive the winding roller 406 to roll, drives the filter cloth 5 to move along the filter plate 3 from bottom to top and roll on the winding roller 406, the new filter cloth moves to the bottom of the filter plate 3 and continues to filter, the filter cloth 5 originally below the liquid level line is moved above the liquid level line, and the solid impurities adhered to the filter cloth 5 are also taken together to above the liquid level line, the waste oil remaining on the filter cloth flows into the oil storage tank 2 after being filtered by gravity and negative pressure fan, and part of it flows to the bottom area of the filter plate 3; when the float ball sensor one 107 triggers a low liquid level alarm, the control box 6 starts the oil inlet pump 106, and the waste oil flows into the filter box 1 to continue filtering; when the float ball sensor one 107 triggers a high liquid level alarm again, the control box 6 stops the oil inlet pump 106 from working, stops the oil inlet, and starts the stepping motor 408 to drive the filter cloth 5 to move, takes the upper half of the filter cloth 5 out of the filter box 1, and the baffle 8 scrapes the solid impurities from the back of the filter cloth 5, so that the solid impurities are separated from the filter cloth 5 and fall into the waste residue tank 9 below.

[0050] When the clean oil in the oil storage tank 2 is at a high liquid level, the float ball sensor two 203 triggers a high liquid level alarm, and the control box 6 starts the oil outlet pump 202 to work to pump out the clean oil; when the float ball sensor two 203 triggers a low liquid level alarm, the control box 6 controls the oil outlet pump 202 to stop working.

[0051] Finally, it should be noted that: the above disclosure is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model. The scope of the present application is limited by the appended claims only.

Claims

1. A filter cloth type oil filter, comprising a filter box (1), an oil storage tank (2), a filter cloth (5), a filter cloth conveying device (4) and a control box (6), the filter box (1) is located on the oil storage tank (2), and the filter box (1) and the oil storage tank (2) are communicated through an intermediate oil filter port (102); the top of the filter box (1) is provided with an oil inlet (101), the bottom of the oil storage tank (2) is provided with an oil outlet (201), and the control box (6) is electrically connected with the filter box (1), the oil storage tank (2) and the filter cloth conveying device (4), characterized in that: The filter box (1) is provided with a filter plate (3), the filter plate (3) is a grid-shaped flat plate, the filter plate (3) is fixedly arranged in the filter box (1), and the filter plate (3) divides the filter box (1) into two mutually isolated spaces; the filter cloth conveying device (4) makes the filter cloth (5) closely adhere to the filter box (1) wall and closely cover the upper surface of the filter plate (3), and the filter cloth conveying device (4) moves the filter cloth (5) along the upper surface of the filter plate (3) from bottom to top.

2. The filter press type oil filter according to claim 1, characterized in that: The filter cloth conveying device (4) comprises a feeding structure (401), a pressing plate (402), a winding structure (403) and a roller (404), the feeding structure (401) is located at the rear end of the filter box (1), the winding structure (403) is located at the front end of the filter box (1), the filter cloth (5) is connected with the feeding structure (401) and the winding structure (403), the pressing plate (402) is detachably fixed to the rear end of the filter box (1), the pressing plate (402) is in close contact with the inner side of the filter box (1) on both sides and close to the rear wall of the filter box (1), the pressing plate (402) presses the filter cloth (5) along the rear wall of the filter box (1) to the bottom of the filter plate (3), and the pressing plate (402) and the roller (404) make the filter cloth (5) closely cover the filter plate (3).

3. The filter press type oil filter according to claim 1 or 2, characterized in that: The filter box (1) is provided with a negative pressure device at the top, the negative pressure device is a negative pressure fan (7), the air inlet (701) of the negative pressure fan (7) is located at the upper end of the filter plate (3), and the air outlet (702) of the negative pressure fan (7) is located at the lower end of the filter plate (3).

4. The filter press type oil filter according to claim 3, characterized in that: The air outlet (702) of the negative pressure fan (7) is located at the front end of the filter box (1) close to the filter plate (3).

5. The filter press type oil filter according to claim 3, characterized in that: The air inlet (701) of the negative pressure fan (7) is further provided with an air guide part (703), and the bottom of the air guide part (703) is a grid-shaped flat plate inclined towards the oil inlet (101).

6. The filter press type oil filter according to claim 1 or 2, characterized in that: The filter box (1) is provided with an oil inlet (101) at the top, and an oil inlet cavity (103) is further arranged at the oil inlet (101), the bottom of the oil inlet cavity (103) is a grid-shaped flat plate with an inclined surface, and the lowest part of the inclined surface is provided with an empty bottom oil return part (104).

7. The filter press type oil filter according to claim 1 or 2, characterized in that: The filter box (1) is further provided with a baffle (8) at the front end, and a waste residue box (9) is further arranged below the baffle (8), and the filter cloth (5) is folded at the bottom end of the baffle (8).

8. The filter press type oil filter according to claim 2, characterized in that: The feeding structure (401) comprises a feeding roller (407) and a travel switch (405), the travel switch (405) is pressed and attached to the surface of the feeding roller (407), and when the travel switch (405) sends a low-position alarm signal of the feeding roller (407), the control box (6) controls the winding structure (403) to stop winding the filter cloth.

9. The filter press type oil filter according to claim 2, wherein: The winding structure (403) comprises a winding roller (406) and a stepping motor (408) for driving the winding roller (406) to rotate, the filter box (1) is further provided with a floating ball sensor I (107), the oil inlet (101) is further connected with an oil inlet pump (106), when the floating ball sensor I (107) triggers the high liquid level alarm of waste oil in the filter box (1), the control box (6) controls the stepping motor (408) to start, drives the winding roller (406) to rotate, and controls the oil inlet pump (106) to stop working; when the floating ball sensor I (107) triggers the low liquid level alarm of waste oil in the filter box (1), the control box (6) controls the oil inlet pump (106) to start, and the waste oil flows into the filter box (1) through the oil inlet pipe (105).

10. The filter press type oil filter according to claim 2, characterized in that: The oil storage tank (2) is further provided with a floating ball sensor II (203), and the oil storage tank (2) is further connected with an oil outlet pump (202), when the floating ball sensor II (203) triggers the high liquid level alarm or the low liquid level alarm of the oil storage tank (2), the control box (6) controls the oil outlet pump (202) to start or stop working.

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