Combined filter element

Abstract

The utility model discloses a combined filter element, which is used on ultrafiltration equipment of a hydraulic system and comprises a core shell, a filter element and a filter element cover, the filter element assembly is arranged in the core shell; the central pipe is arranged in the filter element assembly in a penetrating manner; and the upper part of the central pipe is communicated with a discharging pipe, and the discharging pipe penetrates through the core shell. The filter element assembly comprises a rough filtration filter element positioned at the upper part; the fine filter element is positioned at the lower part; and the joint of the rough filtration filter element and the fine filtration filter element is designed to be communicated. According to the technology, the filter element is formed by combining a coarse filter element and a fine filter element, and filtered hydraulic oil is sucked by a central pipe in a negative pressure suction mode. According to the utility model, particulate matters such as rust and organic impurities in lubricating oil can be filtered out, fine harmful substances such as heavy metals in the oil can be filtered out by the ultrafiltration membrane, and multiple filtration is realized, so that the combination of full flow and high cleanliness is realized, the combination of large flow and ultrafiltration is also realized, the use effect of the lubricating oil is ensured, and the safety of equipment is also ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine oil ultrafiltration, and particularly relates to a combined filter element. Background Art

[0002] 70% of hydraulic system failures are caused by particle contamination of the hydraulic oil. Particle contamination will increase hydraulic system wear and cause pollutants to increase exponentially, forming a vicious cycle and is the main cause of hydraulic system failures.

[0003] Hydraulic oil is usually filtered by surface filtration or depth filtration. The filter medium of surface filtration acts as a surface to intercept dirt during operation, achieving the purpose of purifying and separating the working medium. In depth filtration, there are a large number of semi-through holes and through holes inside. Some dirt particles are blocked on the surface near the upstream of the medium, and some smaller particles enter the filter medium and are adsorbed on the hole wall under the effects of contraction, expansion, hydraulic effect, etc.

[0004] However, the most practical method now is to use ultrafiltration. In the ultrafiltration process, ultrafiltration filter elements are often required to filter the hydraulic oil.

[0005] However, there is a problem in the use of ultrafiltration filter elements. That is, the better the ultrafiltration effect is, the more residual debris will be, causing frequent blockages, affecting the filtering effect, and increasing the cost of replacing the filter element. Utility Model Content

[0006] In order to solve the problems in the related technology, the present application provides a combined filter element, which has the combined use of coarse filtration and ultrafiltration, which can filter out moisture, fine impurities and colloids in the hydraulic oil, and extend the service life of the filter element, realizing the combination of full flow and high cleanliness. It also has the combination of large flow and ultrafiltration, solving the defects mentioned in the background technology.

[0007] The technical solution is as follows:

[0008] The combined filter element is used in the ultrafiltration equipment of the hydraulic system, comprising: a core shell; a filter element assembly arranged inside the core shell; a central tube, which passes through the filter element assembly; the upper part of the central tube is connected to a discharge pipe, and the discharge pipe passes through the core shell.

[0009] Furthermore, the filter element assembly includes: a coarse filter element located at the top; a fine filter element located at the bottom; the connection between the coarse filter element and the fine filter element is a connected design; multiple inlets are opened on the side and top surface of the coarse filter element, or the side and top surface of the coarse filter element are an open design; the side and bottom surface of the fine filter element are a sealed design.

[0010] Furthermore, the coarse filter element is a coarse filter element made of glass fiber material or composite filter paper or high-flux plant fiber material.

[0011] Furthermore, the coarse filter element is designed to include at least one carbon filter and at least two polypropylene cotton filters installed at intervals, and one carbon filter is wrapped between two polypropylene cotton filters.

[0012] Furthermore, the carbon filter comprises activated carbon particles, and the polypropylene cotton filter comprises cotton filter cloth.

[0013] Furthermore, the fine filter element is a fine filter element designed and made from a water removal filter element, an ultrafiltration filter element, or a coalescing filter element.

[0014] Furthermore, the upper end of the center tube is open and the lower end is closed; a plurality of filter holes are provided in the lower part of the center tube, and the filter holes correspond to the interior of the fine filter element; the lower end of the center tube is located at the bottom or lower part of the fine filter element.

[0015] By adopting the above technical solution, compared with the prior art, the beneficial effects of the technology of this patent are:

[0016] The technology of the utility model is composed of a coarse filter element and a fine filter element, and the filtered hydraulic oil is sucked by the central tube through negative pressure suction. The utility model can filter out rust and other particles and organic impurities in the lubricating oil, and the ultrafiltration membrane can filter out heavy metals and other fine harmful substances in the oil. Multiple filtration not only realizes the combination of full flow and high cleanliness, but also has the combination of large flow and ultrafiltration, ensuring the use effect of the lubricating oil and the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the central tube of the utility model. DETAILED DESCRIPTION

[0020] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices and methods consistent with some aspects of the utility model as detailed in the attached claims.

[0021] Example 1

[0022] like Figure 1 , Figure 2 As shown, the present application discloses a combined filter element, which is used in ultrafiltration equipment of hydraulic system, and includes a core shell 5, a central tube 7 and a filter element assembly. The core shell is made of polyamide material, which has good oil resistance and corrosion resistance. Compared with stainless steel, it will not be contaminated with grease during long-term oil filtering, and is easy to clean.

[0023] A filter element assembly is arranged inside the core shell 5. The filter element assembly includes a coarse filter element 3 located at the upper part and a fine filter element 4 located at the lower part. The connection between the coarse filter element 3 and the fine filter element 4 is designed to be connected. Multiple inlets are provided on the side and top surface of the coarse filter element 3, and the side and bottom surface of the fine filter element are designed to be sealed.

[0024] In this embodiment, the coarse filter element 3 is a coarse filter element made of glass fiber material, composite filter paper or high-throughput plant fiber material. The fine filter element 4 is a fine filter element designed and made of a water removal filter element, an ultrafiltration filter element or a coalescing filter element.

[0025] The central tube 7 is inserted into the filter element assembly, and the upper part of the central tube 7 is connected to the discharge pipe 1, and the discharge pipe 1 passes through the core shell 5. In this embodiment, the upper end of the central tube 7 is open and the lower end is closed. A plurality of filter holes 6 are provided at the lower part of the central tube 7, and the filter holes 6 correspond to the interior of the fine filter element. The lower end of the central tube 7 is located at the bottom or lower part of the fine filter element 4.

[0026] When working, the hydraulic oil first enters the coarse filter element 3 to filter out rust and other particles and organic impurities. The hydraulic oil after coarse filtration enters the fine filter element 4 to filter out heavy metals and other fine harmful substances in the hydraulic oil. The hydraulic oil after ultrafiltration enters the central tube. At this time, the discharge pipe 1 is connected to the external negative pressure suction equipment, and the hydraulic oil in the central tube enters the next step of equipment by negative pressure suction.

[0027] Example 2

[0028] The present application discloses a combined filter element, which is used in ultrafiltration equipment of hydraulic system, and includes a core shell, a central tube and a filter element assembly. The core shell is made of polyamide material, which has good oil resistance and corrosion resistance. Compared with stainless steel, it will not be contaminated with grease during long-term oil filtering, and is easy to clean.

[0029] A filter element assembly is arranged inside the core housing. The filter element assembly includes a coarse filter element at the top and a fine filter element at the bottom. The connection between the coarse filter element and the fine filter element is a connected design. The side and top surfaces of the coarse filter element are open designs, and the side and bottom surfaces of the fine filter element are sealed designs.

[0030] In this embodiment, the coarse filter element is at least one carbon filter and at least two polypropylene cotton filters installed at intervals, and one of the carbon filters is wrapped between the two polypropylene cotton filters. The carbon filter includes activated carbon particles, and the polypropylene cotton filter includes cotton filter cloth. The fine filter element is made of ultrafiltration membrane through a laminated design.

[0031] The central tube 7 is inserted into the filter element assembly, and the upper part of the central tube is connected to a discharge pipe, which passes through the core shell. In this embodiment, the upper end of the central tube is open and the lower end is closed. The lower part of the central tube is provided with a plurality of filter holes, and the filter holes correspond to the interior of the fine filter element. The lower end of the central tube is located at the bottom or lower part of the fine filter element.

[0032] When working, the hydraulic oil first enters the coarse filter element to filter out rust and other particles and organic impurities. The hydraulic oil after coarse filtration enters the fine filter element to filter out heavy metals and other fine harmful substances in the hydraulic oil. The hydraulic oil after ultrafiltration enters the central tube. At this time, the discharge pipe is connected to the external negative pressure suction equipment, and the hydraulic oil in the central tube enters the next step of equipment through negative pressure suction.

[0033] The technology of the utility model is composed of a coarse filter element and a fine filter element, and the filtered hydraulic oil is sucked by the central tube through negative pressure suction. The utility model can filter out rust and other particles and organic impurities in the lubricating oil, and the ultrafiltration membrane can filter out heavy metals and other fine harmful substances in the oil. Multiple filtration not only realizes the combination of full flow and high cleanliness, but also has the combination of large flow and ultrafiltration, ensuring the use effect of the lubricating oil and the safety of the equipment.

[0034] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not present in the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

[0035] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. Combined filter element, used in ultrafiltration equipment of hydraulic system, characterized by: include: core shell; A filter element assembly disposed inside the core housing; A central tube is inserted into the filter element assembly; The upper part of the central tube is connected with a discharge pipe, and the discharge pipe passes through the core shell; The filter element assembly comprises: The coarse filter element is located at the upper part; The fine filter element is located at the bottom; The connection between the coarse filter element and the fine filter element is designed to be connected; A plurality of inlets are provided on the side and top surface of the coarse filter element, or the side and top surface of the coarse filter element are of open design; The side surface and bottom surface of the fine filter element are of sealing design.

2. The combined filter element according to claim 1, characterized in that: The coarse filter element is a coarse filter element made of glass fiber material or composite filter paper or high-flux plant fiber material.

3. The combined filter element according to claim 1, characterized in that: The coarse filter element is composed of at least one carbon filter and at least two polypropylene cotton filters which are designed and installed at intervals, and one carbon filter is wrapped between two polypropylene cotton filters.

4. The combined filter element according to claim 3, characterized in that: The carbon filter includes activated carbon particles and the polypropylene cotton filter includes cotton filter cloth.

5. The combined filter element according to claim 1, characterized in that: The fine filter element is a fine filter element designed and made of a water removal filter element, an ultrafiltration filter element or a coalescence filter element.

6. The combined filter element according to claim 1, characterized in that: The upper end of the central tube is open and the lower end is closed; a plurality of filter holes are provided at the lower part of the central tube, and the filter holes correspond to the interior of the fine filter element; the lower end of the central tube is located at the bottom or lower part of the fine filter element.

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