Oil pressing filtering mechanism

Abstract

The utility model provides an oil pressing filtering mechanism which comprises a filtering barrel forming a sealed space and is provided with an oil inlet pipeline and an oil outlet pipeline. The booster pump is used for adding hydraulic pressure to the filtering barrel; the filtering device comprises a flat strip-shaped filtering bag, and a supporting net is adaptively arranged in the filtering bag, so that the inner surface of the filtering bag is attached to the surface of the supporting net; and the oil outlet interface is connected to the filter bag in a sealing manner and is connected with the oil outlet pipeline. During working, the filtering device only needs to be placed in the filtering barrel; during filtration, the whole filter bag is in a flat state and does not deform, meanwhile, oil residues are blocked on the outer surface of the filter bag, and during residue removal, only the filter device needs to be taken out, and the oil residues on the surfaces of the two sides of the filter bag are removed by tools such as a scraper knife; in conclusion, the filtering mechanism is simple in structure, free of installation and disassembly, stable in filtering effect and convenient in slag removal.

Description

Technical Field

[0001] This utility model relates to the field of oil pressing equipment technology, specifically to an oil pressing and filtering mechanism. Background Technology

[0002] During the operation of small-scale commercial oil presses, the pressed vegetable oil contains a lot of impurities and is generally quite turbid, requiring further filtration to clarify the oil. Suitable filtration structures for this type of oil pressing scale and efficiency include bag filters and plate and frame filters. The basic structure of a bag filter involves placing a filter bag at the top inside a sealed container. The inlet of the filter bag is fixed and sealed to the perimeter of the container. Pressurized oil enters the filter bag from the top, while a support frame is provided on the outside of the filter bag to prevent it from bursting or the mesh openings from becoming too large. This filtration method requires a very high degree of sealing along the edges of the filter bag; otherwise, oil will leak out from the edges, failing to achieve the desired filtration effect. Furthermore, the mesh openings of the filter bag are prone to deformation and enlargement, affecting the filtration efficiency. The basic structure of a plate and frame filter press involves fixing the filter cloth to a plate and frame, and using multiple layers of plates, frames, and filter cloth. While this structure makes the filter cloth less prone to deformation, installation and cleaning are difficult, impacting production efficiency. Taking one improved plate and frame structure as an example, it includes a support frame with a central disc, several radially extending spokes, and edge rings connected to the outer ends of the spokes. It also includes a first layer of filter cloth, a support mesh, and a second layer of filter cloth stacked sequentially on top of the support frame. Several layers are stacked in this manner, and then the top support frame is locked downwards, sealing the edges of the two filter cloth layers between them using the edge rings of adjacent supports. To increase the filtration area, multiple layers are typically required, but each layer needs an oil outlet. This improved plate and frame structure requires disassembling and reassembling the top clamping structure, and then stacking or removing the filter cloth, support mesh, and support frame layer by layer on one side. While this simplifies disassembly and assembly compared to the traditional plate and frame structure, it remains relatively cumbersome. Regardless of the filtration structure used, because the oil contains a large amount of oil residue, after a period of filtration, a thick layer of sludge-like oil residue will accumulate on the surface of the filter cloth, which seriously affects filtration. Therefore, a sludge cleaning operation is required. Both of the above filtration structures require disassembly and reassembly of the filter structure when performing the sludge cleaning operation, which is difficult and inefficient. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an oil pressing and filtering mechanism that is simple in structure, easy to install, and easy to clean residue.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An oil pressing and filtering mechanism, including

[0006] The filter barrel forms a sealed space through the cover and is connected to the oil inlet pipe and the oil outlet pipe;

[0007] A booster pump, located on the oil inlet pipe, increases the hydraulic pressure to the filter barrel;

[0008] A filtration device includes a flat, strip-shaped filter bag, wherein a support mesh is adaptedly disposed inside the filter bag so that the inner surface of the filter bag is in contact with the surface of the support mesh.

[0009] The oil outlet is sealed and connected to the filter bag and the oil outlet pipeline.

[0010] In a preferred embodiment, the filter device is wound into a gradually changing spiral structure along its length, comprising multiple spiral coils, with gaps between each spiral coil; the axis of the gradually changing spiral structure is vertically oriented.

[0011] In a preferred embodiment, the filter bucket is provided with multiple sets of the filter devices, and there are gaps between the filter bags of each filter device.

[0012] In a preferred embodiment, the filter bag comprises two or more layers that are adapted and fitted together.

[0013] In a preferred embodiment, the filter bag has one or both open ends along its length and is sealed by a detachable clamping assembly.

[0014] In a preferred embodiment, the clamping assembly includes a first clamping plate disposed along the width direction of the filter bag and folded and wrapped around the filter bag several times, a second clamping plate disposed corresponding to the first clamping plate, and a plurality of first screws for locking the first clamping plate and the second clamping plate from both ends.

[0015] In a preferred embodiment, the oil outlet includes an annular plate with a central through hole that fits against the inner surface of the filter bag, and a pressure cap corresponding to the annular plate on the outer surface of the filter bag. The pressure cap has an adapter hole that corresponds to and communicates with the central through hole, and the adapter hole communicates with the oil outlet pipeline. The annular plate and the pressure cap are locked together by a plurality of second screws to press and seal the corresponding area of ​​the filter bag between the annular plate and the pressure cap on opposite annular planes.

[0016] In a preferred embodiment, the bottom of the filter barrel also has a filter baffle, including a support mesh plate with a certain distance from the bottom surface of the filter barrel and whose outline is adapted to the outline of the inner wall of the filter barrel, and a filter cloth laid on the support mesh plate, wherein the periphery of the filter cloth is in sealed contact with the inner wall of the filter barrel; and an oil outlet that can be controlled to open and close is provided on the filter barrel corresponding to the lower part of the filter baffle.

[0017] In a preferred embodiment, the filter barrel is further connected to an air pressure inlet for increasing air pressure, located above the supporting perforated plate.

[0018] The advantages of this invention are as follows: During use, the filter device simply needs to be placed inside the filter bucket, requiring no additional installation or disassembly. During filtration, the pressurized oil to be filtered enters the filter bag from the outside and flows out from the oil outlet. Because a support mesh is fitted inside the filter bag, the entire filter bag remains flat, preventing deformation, tearing, or enlarging the mesh and reducing filtration efficiency. Simultaneously, oil residue is trapped on the outer surface of the filter bag. Cleaning is simple: just remove the filter device and use a scraper or similar tool to remove the oil residue from both sides of the filter bag; there is no need to disassemble the filter device for cleaning. In summary, this filtration mechanism has a simple structure, requires no installation or disassembly, provides stable filtration, and is easy to clean. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the longitudinal cross-sectional structure of the filtration mechanism in the embodiment;

[0021] Figure 2 This is a schematic cross-sectional view of the filtering mechanism in the embodiment;

[0022] Figure 3 This is a schematic diagram of the filter device in the embodiment;

[0023] Figure 4 This is a cross-sectional view of the oil outlet in the embodiment. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] refer to Figures 1 to 4 An oil pressing and filtering mechanism according to an embodiment includes:

[0026] The filter barrel 1 forms a sealed space through the cover and is connected to an oil inlet pipe 11 and an oil outlet pipe 12; the oil inlet pipe 11 and the oil outlet pipe 12 are both sealed and installed on the barrel wall of the filter barrel 1.

[0027] A booster pump is installed on the oil inlet pipe 11 to increase the hydraulic pressure for the filter barrel 1.

[0028] The filter device 2 includes a flat, strip-shaped filter bag 21. A support mesh 22 is adaptedly disposed inside the filter bag 21 so that the inner surface of the filter bag 21 is in contact with the surface of the support mesh 22. In this embodiment, the support mesh 22 is made of metal woven mesh, which has high support strength and is easy to bend, and also has gaps for the lateral flow of oil. The weaving density of the mesh can be set as needed; the denser the weave, the stronger the support. In other embodiments, a double-layered perforated plate 41 can be used, with the holes between the two layers of perforated plates 41 staggered, or a customized support plate can be used, with lateral textures for the flow of oil on the support plate, etc.

[0029] The oil outlet 3 is sealed and connected to the filter bag 21 and connected to the oil outlet pipeline 12.

[0030] In use, simply place the filter device 2 inside the filter bucket 1; no additional installation or disassembly is required. During filtration, the pressurized oil to be filtered enters the filter bag 21 from the outside and flows out from the oil outlet 3. Because the filter bag 21 is fitted with a support mesh 22, the filter bag 21 remains flat, preventing deformation, tearing, or enlarging the mesh and reducing filtration efficiency. Simultaneously, oil residue is trapped on the outer surface of the filter bag 21. Cleaning is simple: just remove the filter device 2 and use a scraper or similar tool to remove the oil residue from both sides of the filter bag 21; there is no need to disassemble the filter device 2 for cleaning. In summary, this filtration mechanism has a simple structure, requires no installation or disassembly, provides stable filtration, and is easy to clean.

[0031] In a preferred embodiment, the filter device 2 of this embodiment is wound into a gradually changing spiral structure along its length, including multiple spiral coils, with gaps between each spiral coil; the axis of the gradually changing spiral structure is vertically arranged. The gradually changing spiral structure has a simple arrangement, a large filtration area, and can make full use of the space inside the filter barrel 1; the gaps between the spiral coils facilitate the flow of oil and sludge, preventing local blockage. In other embodiments, the filter device 2 may also be a repeatedly folded louver structure, or multiple sets of staggered placement, etc.

[0032] In a preferred embodiment, the filter tank 1 of this embodiment is provided with multiple sets of filter devices 2, and there are gaps between the filter bags 21 of each filter device 2. When multiple sets of filter devices 2 are provided, oil can be discharged through multiple oil outlets 3, which can improve the filtration efficiency.

[0033] In a preferred embodiment, the filter bag 21 includes two or more layers that are fitted together. When two or more layers of filter bags 21 are provided, the oil needs to pass through two or more layers of filtration before flowing out from the oil outlet 3, further improving the filtration effect while having the same advantages.

[0034] In a preferred embodiment, the filter bag 21 in this embodiment has one or both open ends along its length and is sealed by a detachable clamping assembly 23. Sealing from the end with the clamping assembly 23 facilitates the removal of the filter bag 21 for cleaning; simultaneously, the filter bag 21 can be sewn along its length without requiring an additional sealing structure.

[0035] In a preferred embodiment, the clamping assembly 23 includes a first clamping plate arranged along the width direction of the filter bag 21 and folded and wrapped around the filter bag 21 several times, a second clamping plate 231 corresponding to the first clamping plate, and a plurality of first screws 232 locking the first clamping plate and the second clamping plate 231 from both ends. The filter bag 21 is rolled around the first clamping plate and then clamped and locked by the second clamping plate 231, resulting in a good sealing effect at the end of the sealed bag and easy installation and disassembly. In other embodiments, other clamping and sealing structures can also be used, such as two clamping plates hinged at one end and interlocked at the other end; or the end of the filter bag 21 can be simply sewn together.

[0036] In a preferred embodiment, the oil outlet 3 includes an annular piece 31 with a central through hole 311 and fitted to the inner surface of the filter bag 21, and a pressure cap 32 corresponding to the annular piece 31 and disposed on the outer surface of the filter bag 21. The pressure cap 32 has a transition hole 321 corresponding to and communicating with the central through hole 311, and the transition hole 321 is connected to the oil outlet pipeline 12. The annular piece 31 and the pressure cap 32 are locked together by a plurality of second screws 33 to press and seal the corresponding area of ​​the filter bag 21 between the annular planes of the annular piece 31 and the pressure cap 32. The filtered oil flows out of the oil outlet 3 and into the oil outlet pipe 12 under pressure. Specifically, the oil enters the adapter hole 321 of the pressure cap 32 through the central through hole 311 of the annular plate 31, and then flows from the adapter hole 321 to the oil outlet pipe 12 through the pipe. The filter bag 21 corresponding to the central through hole 311 can have a corresponding hole, or it can be without a hole, as pressurized oil can flow. In other embodiments, the oil outlet 3 can also be in other forms, such as an elongated hole extending from the side of the filter bag 21, with the interface of the oil outlet pipe 12 extending into the elongated hole of the filter bag 21, and then being clamped to the outer wall of the elongated hole by an annular component; or two clamping plates with opposite grooves clamp the edges of the filter bag 21 from both sides, and then connect the hole formed by the two opposite grooves to the oil outlet pipe 12.

[0037] In a preferred embodiment, the bottom of the filter barrel 1 further includes a filter baffle 4, comprising a perforated plate 22 with a certain distance from the bottom surface of the filter barrel 1 and whose outline is adapted to the outline of the inner wall of the filter barrel 1, and a filter cloth 42 laid on the perforated plate 22, wherein the periphery of the filter cloth 42 is in sealed contact with the inner wall of the filter barrel 1; an oil outlet 13 that can be controlled to open and close is provided on the filter barrel 1 below the filter baffle 4. When the oil filtration is almost finished, the oil in the filter barrel 1 decreases and loses its inlet pressure, the remaining oil can be filtered through the filter cloth 42. At this time, the oil can be filtered through the filter cloth 42 by its own gravity or by external pressure. In this embodiment, by connecting an air pressure inlet above the perforated plate 22 in the filter barrel 1, pressure can be applied to the tail oil. Of course, in other embodiments, a negative pressure structure can also be provided below the filter baffle 4 to apply pressure to the tail oil as well. When the oil is filtered through the filter device 2, the oil outlet is closed to prevent the oil from being filtered through the filter cloth 42. The oil outlet is only opened after the filter bag 21 stops filtering to filter the tail oil.

[0038] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. An oil pressing and filtering mechanism, characterized in that, include The filter barrel forms a sealed space through the cover and is connected to the oil inlet pipe and the oil outlet pipe; A booster pump, located on the oil inlet pipe, increases the hydraulic pressure to the filter barrel; A filtration device includes a flat, strip-shaped filter bag, wherein a support mesh is adaptedly disposed inside the filter bag so that the inner surface of the filter bag is in contact with the surface of the support mesh. The oil outlet is sealed and connected to the filter bag and the oil outlet pipeline.

2. The oil pressing and filtering mechanism according to claim 1, characterized in that: The filter device is wound into a gradually changing spiral structure along its length, including multiple spiral coils, and there is a gap between each spiral coil; the axis of the gradually changing spiral structure is arranged vertically.

3. The oil pressing and filtering mechanism according to claim 1, characterized in that: The filter bucket is equipped with multiple sets of the filter devices, and there are gaps between the filter bags of each filter device.

4. The oil pressing and filtering mechanism according to claim 1, characterized in that: The filter bag comprises two or more layers that are fitted together.

5. The oil pressing and filtering mechanism according to claim 1, characterized in that: The filter bag has one or both open ends along its length and is sealed by a detachable clamping assembly.

6. The oil pressing and filtering mechanism according to claim 5, characterized in that: The clamping assembly includes a first clamping plate arranged along the width direction of the filter bag and folded and wrapped around the filter bag several times, a second clamping plate arranged corresponding to the first clamping plate, and a plurality of first screws that lock the first clamping plate and the second clamping plate from both ends.

7. The oil pressing and filtering mechanism according to claim 1, characterized in that: The oil outlet includes an annular piece with a central through hole that fits against the inner surface of the filter bag, and a pressure cap corresponding to the annular piece on the outer surface of the filter bag. The pressure cap has a transition hole that corresponds to and communicates with the central through hole, and the transition hole communicates with the oil outlet pipeline. The annular piece and the pressure cap are locked together by a number of second screws to press and seal the corresponding area of ​​the filter bag between the annular pieces and the pressure cap on opposite annular planes.

8. The oil pressing and filtering mechanism according to claim 1, characterized in that: The bottom of the filter barrel also has a filter baffle, including a support mesh plate with a certain distance from the bottom surface of the filter barrel and whose outline is adapted to the outline of the inner wall of the filter barrel, and a filter cloth laid on the support mesh plate, wherein the periphery of the filter cloth is in sealed contact with the inner wall of the filter barrel; an oil outlet that can be controlled to open and close is provided on the filter barrel corresponding to the lower part of the filter baffle.

9. The oil pressing and filtering mechanism according to claim 8, characterized in that: The filter barrel is also connected to a pressure inlet for increasing air pressure, located above the supporting mesh plate.

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