Base oil filtration and separation device

Abstract

This invention relates to the field of oil filtration equipment technology, specifically a base oil filtration and separation device. The device includes a frame with an internal cavity, a slag discharge port, and an oil injection port connected to an external positive pressure oil supply mechanism. Above the oil injection port, the internal cavity is equipped with a constraint cover and a flow-damping plate, which together form a guiding and flow-damping structure to facilitate oil flow along a curved path. Above the flow-damping plate is a filter press frame with several filter cylinders. The outer walls of the filter cylinders are covered with filter screens, and the internal space of the filter cylinders extends to the outside of the frame via an oil outlet pipe connected to the top. This invention provides a base oil filtration and separation device that effectively solves the problem of existing filtration devices using a top-down filtration path, which easily leads to rapid sedimentation of impurities in the crude oil causing filter screen blockage, and subsequent injection of crude oil continuously churning up impurities, accelerating the complete blockage of the filter screen.

Description

Technical Field

[0001] The present invention relates to the technical field of oil filtering equipment, in particular to a base oil filtering and separating device. Background Art

[0002] Base oils are used to make products including greases, motor oils and metalworking fluids. Different products require different oil compositions and properties. One of the most important factors is the viscosity of the liquid at different temperatures. The suitability of crude oil for making base oil depends on the concentration of base oil molecules and the ease of extracting these molecules. Base oils are produced by refining crude oil, which means that the crude oil is heated so that the various distillates can be separated from each other. Therefore, during the base oil production process, there are more impurities, and filtering equipment is usually required to assist in filtering the base oil to ensure the purity of the base oil during the production process.

[0003] In the prior art, patent document CN211611916U proposes an automatic base oil slag discharge device, which relates to the field of base oil technology and aims to solve the problems of high cost and poor treatment effect of existing slag discharge equipment. A filter screen is installed above the interior of the slag discharge filter box, and the filter screen includes a primary filter screen and a secondary filter screen, and the primary filter screen is located above the secondary filter screen. A filter sand fixing frame is installed below the filter screen, and filter sand is arranged inside the filter sand fixing frame. A base oil inlet pipe is installed on one side of the upper end of the slag discharge filter box, and a liquid outlet is provided on one side of the slag discharge filter box. A second base oil collection pipe is installed at one end of the liquid outlet, and the second base oil collection pipe is embedded in the interior of the slag discharge filter box. A first base oil collection pipe is installed at the other end of the liquid outlet. A backwash water inlet pipe is provided at the upper end of the first base oil collection pipe, and a backwash water discharge pipe is installed in the middle of the lower end of the slag discharge filter box.

[0004] In the above technical solution, crude oil is fed from the top of the filter box downwards, directly passing through the filter screen. This arrangement makes it easy for impurities in the crude oil to quickly settle and accumulate in the area above the filter screen due to their own gravity during the base oil filtration process, causing the filter gaps of the filter screen to be easily covered and clogged by impurities, thereby affecting the subsequent oil penetration of the crude oil. In addition, impurities located in the bottom area close to the filter screen will cause clogging of the filter screen. At the same time, impurities in the top area, affected by the subsequent injection of crude oil, will form impurity surges in the upper layer, increasing the mobility of impurities in the oil, making the oil in each area more turbid, and thus accelerating the speed at which impurities clog each area of ​​the filter screen. Therefore, there is an urgent need for a base oil filtration and separation device that can solve the above-mentioned defects. Summary of the Invention

[0005] The present invention provides a base oil filtering and separation device, which is conducive to solving the problem that some existing filtering devices adopt a top-down oil filtering path, which easily causes impurities contained in the crude oil to quickly precipitate and cause filter clogging, and the subsequent injection of crude oil continuously stirs up impurities and accelerates the complete clogging of the filter.

[0006] The present invention is achieved in that:

[0007] and a tube connecting the discharging opening of the filter element with a plug in the forward end of the crank case, said tube having a check valve in it at the pump end, and said former tube which connects the filter housing the filter housing, and said former tube which connects the filter housing, wherein the filter housing has a check valve in it at the pump end.

[0008] On the basis of the above technical solution, a cone bucket structure that is wide at the top and narrow at the bottom is provided at the bottom of the frame, a support is provided at the bottom of the outer end of the frame, and the slag discharge port is located at the bottom of the cone bucket structure.

[0009] On the basis of the above technical solution, the inner cavity is provided with a vortex finder at the bottom of the guide member, and the vortex finder is connected to the inner side wall of the frame through a bracket, and the vortex finder can generate vortex driving force upward.

[0010] Based on the above technical solution, the vortex finder is located in the area below the oil filling port.

[0011] Based on the above technical solution, the slow flow plate includes a first plate body and a second plate body distributed longitudinally at intervals. The first plate body is located below the second plate body. The first plate body is provided with a blocking portion in the radial center area opposite the perforation. A number of slow flow holes are evenly arranged on the periphery of the blocking portion, and the slow flow holes penetrate the first plate body longitudinally; a number of slow flow grooves are provided on the second plate body, and the slow flow grooves penetrate the second plate body longitudinally.

[0012] Based on the above technical solution, the filter press frame includes two longitudinally spaced mounting plates, the filter cartridge is vertically arranged between the mounting plates, the sides of the filter cartridge are evenly distributed with hollow holes, and the outer wall of the filter cartridge is centrally symmetrically arranged with several ribs around its axial center line, and the filter screen is arranged against the outer end of the rib.

[0013] Based on the above technical solution, the filter screen between adjacent ribs has a curved structure.

[0014] On the basis of the above technical solution, a diversion hood is arranged at intervals on the outer end of the filter cartridge. The diversion hood is arranged vertically, and the axial ends of the diversion hood are connected to the mounting plate of the filter press frame. A number of diversion holes are provided on the side wall of the diversion hood, and the diversion holes radially penetrate the side wall of the diversion hood.

[0015] On the basis of the above technical solution, an elastic pad is arranged between the diverter hood and the filter screen, and several elastic pads are arranged symmetrically around the axial center line of the diverter hood. The axial ends of the diverter hood are movably connected to the mounting frame, and the elastic pads constitute an elastic support structure in the radial direction of the diverter hood.

[0016] On the basis of the above technical solution, a longitudinal elastic support structure is provided between the slow flow plate and the inner side wall of the frame.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] 1. The present invention realizes the flow of oil along a complex curved path by arranging the oil filling port at the bottom and the oil outlet pipe at the top, and utilizes the combined design of the restraining cover, the slow flow plate and the guide piece, thereby effectively slowing down the oil flow speed, so that the impurities contained in the oil can quickly form sediments at the bottom of the inner cavity, reducing the amount of impurities rising, and further reducing the direct impact and rapid accumulation of impurities on the filter screen. This is conducive to solving the problem that some existing filtering devices adopt a top-down oil filtering path, which easily leads to the clogging of the filter screen due to the rapid precipitation of impurities contained in the crude oil, and the subsequent injection of crude oil continuously stirs up the impurities and accelerates the complete clogging of the filter screen.

[0019] 2. A flow guide is set under the restraint cover so that the crude oil entering the inner cavity through the oil filling port can be guided by the flow in the first time. In conjunction with the positive pressure conditions provided by the outside, the setting of the spiral blades enables the entire oil to flow in a spiral ascending path, which has a convergence and directional effect, and avoids the confusion of the positions of the oil entering the inner cavity from the front and back. In addition, the design of the resistance-increasing flange makes the oil receive a certain degree of resistance during the flow process. This resistance can control the flow rate and make the impurities mixed in the oil be initially intercepted, and a clustering effect is generated after multiple superposition in quantity. This is conducive to the rapid precipitation of impurities by their own weight after accumulation to a certain amount, further promoting the separation and sedimentation of impurities in the oil and improving the filtration efficiency.

[0020] 3. The optimized design of the filter cartridge and diversion cover increases the filtration area, improves the filtration efficiency, and reduces the risk of local overload of the filter.

[0021] 4. The longitudinal elastic support structure ensures that the slow flow plate can form an autonomous tensioning structure during long-term use, providing a certain degree of help in flow rate control, making the flow of oil more stable and durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a base oil filtering and separation device in one embodiment;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the middle slow flow plate;

[0025] Figure 3 Schematic diagram of the partial structure of a spiral blade in one embodiment;

[0026] Figure 4 This is a schematic structural diagram of a filter cartridge in one embodiment;

[0027] Figure 5 for Figure 4 Schematic diagram of the structure of the middle splitter hood;

[0028] Figure 6 for Figure 4 sectional view of

[0029] Figure 7 is a cross-sectional view of a filter cartridge in another embodiment;

[0030] Figure 8 for Figure 7 Schematic diagram of the compressed state of the elastic pad;

[0031] Figure 9 is a cross-sectional view of an elastic pad in another embodiment;

[0032] Figure 10 is a cross-sectional view of an elastic pad in yet another embodiment;

[0033] Figure 11 Schematic diagram of the longitudinal elastic support structure of the slow flow plate in one embodiment.

[0034] The following are marked in the figure: 1, frame; 11, inner cavity; 12, oil filling port; 13, slag discharge port; 14, support; 15, pressure relief valve; 2, restraint cover; 21, perforation; 22, guide cone; 3, flow guide; 31, spiral blade; 32, boss; 4, slow flow plate; 41, first plate; 411, baffle; 412, slow flow hole; 42, second plate; 421, slow flow groove; 43, limit Positioning rod; 44, spring; 5, filter press frame; 51, oil outlet pipe; 6, filter cartridge; 61, cylinder; 611, rib; 62, filter screen; 63, oil outlet; 64, diverter cover; 641, diverter hole; 65, elastic pad; 651, inner plate; 652, outer plate; 653, support beam; 654, buffer chamber; 655, auxiliary beam; 656, pleated beam; 657, cavity; 7, vortex finder DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0036] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1: Figure 1As shown, this embodiment discloses a base oil filtration and separation device, including a frame 1 with a cylindrical structure, with an inner cavity 11 provided inside the frame 1. The inner cavity 11 serves as the main space for oil filtration. A cone-shaped bucket structure that is wide at the top and narrow at the bottom is provided at the bottom of the outer end of the frame 1. Support pillars 14 are provided at the bottom of the outer end of the frame 1. Multiple support pillars 14 support the frame 1. A slag discharge port 13 is located at the bottom of the cone-shaped bucket structure. The support pillars 14 also elevate the position of the slag discharge port 13 to facilitate external piping and slag discharge operations. A pressure relief valve 15 is provided at the top of the frame 1 to prevent internal pressure from overpressure and loss of control.

[0040] An oil inlet 12 is provided on the side wall of the frame 1 above the slag discharge port 13. This inlet 12 is connected to an external positive-pressure oil supply mechanism. This is prior art, and its specific structure and operating principle will not be described in detail here. Those skilled in the art will be able to select and implement a suitable model from the existing technology based on actual operational conditions. It should be noted that the oil inlet 12 in this embodiment is tilted in direction. This allows the crude oil, after entering the inner cavity 11 through the inlet 12, to flow along the inner side wall of the frame 1 in a threshold direction, thereby cooperating with the structure of the flow guide 3.

[0041] The inner cavity 11 is located above the oil filling port 12 and is provided with a restraining cover 2 with a conical structure that is narrow at the top and wide at the bottom, similar to a bamboo hat structure, wherein the radial outer end of the restraining cover 2 is fitly connected to the inner wall of the frame 1, so that the oil below cannot penetrate from the periphery and bypass the restraining cover 2. A through-hole 21 with a longitudinal through-hole structure is provided at the center position of the top of the restraining cover 2. The function of the through-hole 21 is to allow the oil below to converge and then ascend to the upper area, that is, to have a directional effect on the flow path of the oil. The lower section of the restraining cover 2 is a guiding cone surface 22 to make the flow of the oil smoother and more stable.

[0042] The inner cavity 11 is located above the restraint cover 2 and is provided with a slow flow plate 4. The slow flow plate 4 and the restraint cover 2 form a guiding slow flow structure for the oil to flow along a curved path, which effectively controls the flow rate and helps to intercept more impurities through the tortuous path.

[0043] Specifically, in this embodiment, combined with Figure 2As shown, the slow flow plate 4 includes a first plate body 41 and a second plate body 42 distributed longitudinally at intervals. The first plate body 41 is located below the second plate body 42. The first plate body 41 is provided with a blocking portion 411 in the radial center area opposite the through hole 21. A plurality of slow flow holes 412 are evenly arranged on the periphery of the blocking portion 411. The slow flow holes 412 are circular through-hole structures, and the slow flow holes 412 longitudinally penetrate the first plate body 41; a plurality of slow flow grooves 421 are provided on the second plate body 42, and the slow flow grooves 421 are arc-shaped slot hole structures, and the slow flow grooves 421 longitudinally penetrate the second plate body 42. It should be noted that the slow-flow groove 421 and the slow-flow hole 412 are staggered. The slow-flow plate 4 utilizes a double-layer plate structure and an ingenious through-hole structure design. Due to the existence of the blocking portion 411, the oil passing through the perforation 21 of the constraint cover 2 cannot directly ascend vertically, and needs to turn horizontally to the outer area and be diverted through the slow-flow hole 412. This not only reduces the flow rate but also makes the distribution of fine impurities in the oil more even. In this process, some impurities will precipitate due to their own weight and be intercepted in the top area of ​​the constraint cover 2, so that the impurity content of the subsequent upward oil is further reduced.

[0044] A filter press frame 5 is located above the slow flow plate 4. Several filter cartridges 6 are mounted on the frame 5. Filter screens 62 are wrapped around the outer walls of the filter cartridges 6. An oil outlet 63 is located at the top of the filter cartridges 6. This outlet 63 connects the interior of the filter cartridges 6 to the oil outlet pipe 51 at the top, extending to the outside of the frame 1 for easy drainage of the filtered oil. The filter press frame 5 secures the filter cartridges 6, which filter impurities from the oil. The purified oil then enters the filter cartridges 6 and is discharged along the oil outlet pipe 51.

[0045] Specific, combined Figure 4 The filter press frame 5 includes two longitudinally spaced mounting plates, with a filter cartridge 6 vertically positioned between the mounting plates. Hollow holes are evenly distributed on the sides of the filter cartridge 6, allowing filtered oil to enter the interior of the filter cartridge 6. The size and number of the hollow holes are designed according to actual processing requirements. A cylindrical body 61 is provided inside the filter cartridge 6, and a plurality of ribs 611 are centrally symmetrically arranged on the outer wall of the cylindrical body 61 around its axial centerline. Figure 6 As shown, the ribs 611 and the cylinder 61 are an integrated structure. The function of the ribs 611 is to radially extend the radial outer contour of the cylinder 61 and to create a side space for the cylinder 61. The filter screen 62 is arranged against the outer end of the ribs 611 as the main structure for fine filtration.

[0046] It should be noted that the filter screen 62 between adjacent ribs 611 has a curved structure, which increases the surface area of ​​the filter screen 62 and, in conjunction with the overhead effect of the ribs 611, greatly improves the filtering efficiency.

[0047] Further, combined Figure 4 and Figure 6The outer end of the cylinder 61 is provided with a diverter cover 64 at intervals. The diverter cover 64 is vertically arranged. The axial ends of the diverter cover 64 are connected to the mounting plate of the filter press frame 5. A plurality of diverter holes 641 are provided on the side wall of the diverter cover 64. The diverter holes 641 have a strip-shaped slot structure. The diverter holes 641 radially penetrate the side wall of the diverter cover 64. The function of the diverter cover 64 is to construct a flow limiting and diverting structure on the periphery of each cylinder 61, so that the oil on the periphery of the filter cartridge 6 can contact each area of ​​the filter screen 62 more evenly and comprehensively, reducing the occurrence of local working overload, which is conducive to ensuring the filtration quality and improving the filtration efficiency.

[0048] In this embodiment, in order to achieve a relatively ideal coarse filtering effect on the crude oil entering the inner cavity 11 at the first time, the Figure 1 and Figure 3 As shown, a guide member 3 is further provided under the restraint cover 2. The guide member 3 is a cylindrical mechanism arranged in contact with the inner wall of the frame 1. A spiral blade 31 is provided on the inner wall of the guide member 3 which is adapted to the oil inlet direction of the oil filling port 12. After entering the oil filling port 12, the oil will flow along the inner wall of the guide member 3. Due to the presence of the spiral blade 31, the oil is guided when flowing, generating an upward spiral flow path. A plurality of resistance-increasing flanges are provided at the bottom of the spiral blade 31. The resistance-increasing flanges are specifically a plurality of convex columns 32. The function of the convex columns 32 is to increase the contact area between the spiral blade 31 and the oil and increase the friction so that impurities can be effectively intercepted, thereby facilitating the precipitation of impurities by gravity.

[0049] Furthermore, in order to compensate for the upward spiral driving force of the oil, the inner cavity 11 is provided with a vortex finder 7 at the bottom of the guide member 3. The vortex finder 7 is connected to the inner wall of the frame 1 through a bracket. The vortex finder 7 can generate an upward vortex driving force, so that the oil can spiral upward more stably. Correspondingly, due to the increase in the vortex driving force and the pressure provided by the outside, the oil will actually be affected by centrifugal force during the upward process, resulting in more impurities being gathered in the peripheral area, increasing the contact friction with the inner wall of the guide member 3, and then under the auxiliary influence of the boss 32, the effect of autonomous precipitation of impurities is improved, and a low-energy coarse filtration process is performed.

[0050] It should be noted that the vortex finder 7 is located in the area below the oil filling port 12, which can maintain the effective utilization rate of the vortex driving force and prevent part of the oil from directly escaping to the area below to cause a flow dead zone.

[0051] Example 2: Based on Example 1, Figure 7As shown, in this embodiment, an elastic pad 65 is disposed between the diverter cover 64 and the filter screen 62. The elastic pad 65 is a strip-shaped structure with its long side parallel to the axial direction of the diverter cover 64. A plurality of elastic pads 65 are centrally symmetrically arranged around the axial centerline of the diverter cover 64. The diverter cover 64 is movably connected to the mounting bracket at both axial ends. The elastic pads 65 form an elastic support structure in the radial direction of the diverter cover 64. This allows the elastic pads 65 to provide corresponding elastic support when the oil flow rate in the outer area of ​​the diverter cover 64 is too high, generating local radial inward pressure on the diverter cover 64. Specifically, the elastic pads 65 in the pressured area absorb some of the pressure and contract. This contraction compresses the gap between the diverter cover 64 and the inner filter screen 62 in that area, reducing the flow resistance in that area. This increases the flow resistance in that area, which in turn feeds back to the oil outside that area, reducing the flow rate in that area. Thus, autonomous flow control is achieved, allowing the filter screens 62 in each area to operate with a relatively balanced workload, thereby improving filtration efficiency and ensuring filtration quality.

[0052] Further, combined Figure 8 As shown, the elastic pad 65 in this embodiment includes an inner plate 651, an outer plate 652 and a support beam 653 made of elastic material (rubber, silicone, etc., the material of which is selected according to the characteristics of the oil actually processed). The cross-section formed by the inner plate 651 and the outer plate 652 is a "D"-shaped structure. The inner ends of the inner plate 651 and the outer plate 652 form two buffer chambers 654, which makes the structure of the elastic pad 65 more sensitive and elastic. The inner side of the inner plate 651 abuts against the filter 62, and the outer side of the outer plate 652 is connected and fixed to the inner wall of the diverter cover 64. The support beam 653 serves as the main elastic support. When receiving pressure, the support beam 653 will produce passive deformation to absorb part of the pressure.

[0053] Example 3: Based on Example 2, combined Figure 9 As shown, in this embodiment, the inner sheet 651 of the elastic pad 65 is located on one side of the buffer cavity 654 and is further provided with a plurality of auxiliary beams 655. The radial height of the auxiliary beams 655 is lower than the height of the support beams 653. The function of the auxiliary beams 655 is that when the elastic pad 65 is subjected to a large degree of extrusion pressure, the outer sheet 652 and the support beams 653 shrink to a large extent, and the auxiliary beams 655 can provide auxiliary support to prevent the elastic pad 65 from being excessively squeezed. This also enables the elastic support effect of the elastic band to be achieved in segments, and the buffering performance is richer.

[0054] Example 4: Based on Example 2, combined Figure 10As shown, in this embodiment, a pleated beam 656 is used between the inner plate 651 and the outer plate 652 to replace the support beam 653 in Example 2. The pleated beam 656 is a beam structure having a number of staggered sizes and interconnected in a linear manner. A cavity 657 is provided inside the pleated beam 656. The cavity 657 softens the structural rigidity of the pleated beam 656, so that it has sensitive multi-stage elastic characteristics on the basis of having a certain supporting function. The specifications of the pleated beam 656 can be designed and processed according to the actual elastic support requirements.

[0055] Example 5: Based on Example 1, Figure 11 As shown, in this embodiment, in order to enrich the structure and function of the slow flow plate 4, a longitudinal elastic support structure is provided between the slow flow plate 4 and the inner side wall of the frame 1. The elastic support structure specifically includes a structure provided on the slow flow plate 4 (including a first plate body 41 and a second plate body 42, Figure 11 The bottom end of the spring 44 is connected and fixed to the bottom end of the limit rod 43, and the spring 44 actually plays the role of pulling the slow flow plate 4 down and resetting it. When the upward oil liquid produces excessive upward push on the slow flow plate 4 due to too fast flow rate, the spring 44 can pull the slow flow plate 4 down and support it, thereby playing the role of autonomously adjusting the resistance of the upward oil liquid, so that the flow rate is stably and dynamically controlled, providing relatively stable conditions for subsequent filtration.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A base oil filtering and separating device, characterized in that: The machine frame (1) comprises a cylinder (61) structure, an inner cavity (11) is provided inside the machine frame (1), a slag discharge port (13) which can be opened and closed is provided at the bottom of the inner cavity (11), an oil injection port (12) is provided on the side wall of the machine frame (1) above the slag discharge port (13), and the oil injection port (12) is connected to an external positive pressure oil supply mechanism; a restraining cover (2) with a frustum structure having a narrow top and a wide bottom is provided above the inner cavity (11) and above the oil injection port (12), the radial outer end of the restraining cover (2) is fitted and connected to the inner wall of the machine frame (1), and the restraining cover (2) is provided to prevent the restraining cover (2) from being damaged. A perforation (21) with a longitudinal through-hole structure is provided at the center of the top of the cover (2); a slow-flow plate (4) is provided on the inner cavity (11) above the restraining cover (2); the slow-flow plate (4) and the restraining cover (2) form a guiding slow-flow structure for oil to flow along a curved path; a filter press frame (5) is provided above the slow-flow plate (4); a plurality of filter cartridges (6) are provided on the filter press frame (5); a filter screen (62) is wrapped on the outer wall of the filter cartridge (6); and the inner space of the filter cartridge (6) extends to the outside of the frame (1) through an oil outlet pipe (51) connected to the top; A flow guide (3) is also provided below the restraining cover (2). The flow guide (3) is a cylinder (61) mechanism arranged in contact with the inner wall of the frame (1). A spiral blade (31) adapted to the oil inlet direction of the oil filling port (12) is provided on the inner wall of the flow guide (3). A plurality of resistance-increasing flanges are provided at the bottom of the spiral blade (31). The filter press frame (5) comprises two mounting plates spaced apart in the longitudinal direction, the filter cartridge (6) is vertically arranged between the mounting plates, the side of the filter cartridge (6) is evenly provided with hollow holes, and a plurality of ribs (611) are centrally symmetrically arranged on the outer wall of the filter cartridge (6) around its axial center line, and the filter screen (62) is arranged against the outer end of the rib (611); A flow divider (64) is arranged at intervals on the outer end of the filter cartridge (6), the flow divider (64) is arranged vertically, the axial ends of the flow divider (64) are connected to the mounting plate of the filter press frame (5), a plurality of flow divider holes (641) are arranged on the side wall of the flow divider (64), and the flow divider holes (641) radially penetrate the side wall of the flow divider (64); An elastic pad (65) is disposed between the flow splitter cover (64) and the filter screen (62), and a plurality of elastic pads (65) are centrally symmetrically arranged around the axial center line of the flow splitter cover (64). Both axial ends of the flow splitter cover (64) are movably connected to the mounting frame, and the elastic pads (65) constitute an elastic supporting structure of the flow splitter cover (64) in the radial direction.

2. The base oil filtering and separating device according to claim 1, characterized in that: A cone bucket structure that is wide at the top and narrow at the bottom is provided at the bottom of the frame (1), a support column (14) is provided at the bottom of the outer end of the frame (1), and the slag discharge port (13) is located at the bottom of the cone bucket structure.

3. The base oil filtering and separating device according to claim 1, characterized in that: The inner cavity (11) is provided with a vortex finder (7) at the bottom of the flow guide (3); the vortex finder (7) is connected to the inner side wall of the frame (1) via a bracket; the vortex finder (7) is capable of generating vortex driving force upwards.

4. The base oil filtering and separating device according to claim 3, characterized in that: The vortex finder (7) is located in the area below the oil filling port (12).

5. The base oil filtering and separating device according to claim 1, characterized in that: The slow flow plate (4) comprises a first plate body (41) and a second plate body (42) which are spaced apart in the longitudinal direction. The first plate body (41) is located below the second plate body (42). A baffle (411) is provided in the radial center area of ​​the first plate body (41) facing the through hole (21). A plurality of slow flow holes (412) are evenly arranged around the baffle (411). The slow flow holes (412) penetrate the first plate body (41) in the longitudinal direction. The second plate body (42) is provided with a plurality of slow flow grooves (421). The slow flow grooves (421) penetrate the second plate body (42) in the longitudinal direction.

6. The base oil filtering and separating device according to claim 1, characterized in that: The filter screen (62) between adjacent ribs (611) has a curved structure.

7. The base oil filtering and separating device according to claim 1, characterized in that: A longitudinal elastic support structure is provided between the slow flow plate (4) and the inner wall of the frame (1).

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