阅读说明：本技术 抗静电回油过滤装置 (Antistatic oil return filter equipment ) 是由 潘周雷 李崇鸣 李奕璋 于 2020-05-12 设计创作，主要内容包括：本发明公开了一种抗静电回油过滤装置,包括锁紧件、过滤芯、保护网和金属外壳,所述金属外壳的侧壁下端设置有若干进油孔,所述保护网的侧壁设置有若干滤孔,所述过滤芯设置于所述保护网内,所述过滤芯包括过滤网,所述过滤网的下游端设置有呈筒状的抗静电网,所述抗静电网包括若干沿周向均布且呈间隔设置的纬线抗静电丝和若干沿周向均布且呈间隔设置的经线抗静电丝,所述若干纬线抗静电丝和若干经线抗静电丝以交错叠压方式编织形成片状网面,再卷绕形成所述筒状的抗静电网。本发明提供了一种防止油液中的静电荷产生堆积,防止过滤器空爆,提高液压系统安全性能的抗静电回油过滤装置。(The invention discloses an antistatic oil return filtering device which comprises a locking piece, a filtering core, a protecting net and a metal shell, wherein a plurality of oil inlet holes are formed in the lower end of the side wall of the metal shell, a plurality of filtering holes are formed in the side wall of the protecting net, the filtering core is arranged in the protecting net and comprises a filtering net, a cylindrical antistatic net is arranged at the downstream end of the filtering net, the antistatic net comprises a plurality of weft antistatic wires which are uniformly distributed along the circumferential direction and are arranged at intervals and a plurality of warp antistatic wires which are uniformly distributed along the circumferential direction and are arranged at intervals, the weft antistatic wires and the warp antistatic wires are woven in a staggered and superposed mode to form a sheet net surface, and then the sheet net surface is formed by winding. The invention provides an antistatic return oil filtering device which can prevent static charges in oil from being accumulated, prevent a filter from being empty and improve the safety performance of a hydraulic system.)

1. The utility model provides an antistatic oil return filter equipment, includes retaining member, crosses filter core, protection network and metal casing, metal casing's lateral wall lower extreme is provided with a plurality of inlet ports, the lateral wall of protection network is provided with a plurality of filtration pores, cross the filter core set up in the protection network, it includes filter screen, its characterized in that to cross the filter core: the low reaches end of filter screen is provided with the antistatic net that is the tube-shape, the antistatic net includes a plurality of weft antistatic silk and a plurality of warp antistatic silk that just are the interval setting along the circumference equipartition and be the interval setting that the interval set up along the circumference equipartition, a plurality of weft antistatic silk and a plurality of warp antistatic silk weave the formation slice wire side with crisscross pressure-superposed mode, convolute the formation again the antistatic net of tube-shape.

2. The antistatic oil return filtration device of claim 1 wherein: the antistatic silk of weft is made by metal material, the antistatic silk of warp is made by antistatic PET material, and the slice net surface of formation is formed along weft direction coiling the antistatic net of tube-shape.

3. The antistatic oil return filtration device of claim 2 wherein: the anti-static wire of weft is made by 304 stainless steel material.

4. The antistatic oil return filtration device of claim 2 or 3 wherein: the lateral wall of antistatic net is along circumference with the setting of buckling of roll over the face form.

5. The antistatic oil return filtration device of claim 3 wherein: the thickness of the antistatic silk of weft is 0.18mm, the thickness of the antistatic silk of warp is 0.3 mm.

6. The antistatic oil return filtration device of claim 1 wherein: the filter core is provided with the skeleton in the downstream end of antistatic net, be provided with the galvanizing coat on the skeleton.

Technical Field

The invention belongs to the technical field of hydraulic system filtering devices, and particularly relates to an antistatic oil return filtering device.

Background

At present, because a hydraulic system mainly uses hydraulic oil to circulate in a pipeline to drive an execution element to do work, in the running process, after the energy efficiency of the hydraulic oil is reduced along with the passage of time, dissolved particles and external pollutants can slowly block a channel to cause mechanical faults, so that the hydraulic system cannot work normally, the cleanness degree of the hydraulic oil is one of important indexes of whether the whole set of hydraulic system can run normally, and therefore, an oil return filter is one of necessary accessories of the hydraulic system. The return filter is arranged in an oil tank at the tail end of a return pipeline in the system and is used for capturing pollutants generated or invaded in the system before returning to the oil tank. It is therefore the most effective and important filter to control the concentration of system contaminants.

Traditional oil return filter includes retaining member and filter element, filter element wholly is the tubular structure, filter element includes inside and outside two-layer insulation support frame and sets up the filter screen between inside and outside two-layer insulation support frame, among the prior art, inside and outside layer insulation support frame all adopts epoxy net parcel wire netting to constitute in order to realize better corrosion resistance, and the filter screen adopts glass fiber to make, because of it has that filter fineness is high, the logical oil ability is big, original loss of pressure is few, receive dirty advantage such as big, by wide application in the manufacturing of filter screen. However, in the hydraulic system, when oil flows through the filter screen, friction is formed between the oil and the filter screen made of glass fiber to generate a large amount of static charges, the large amount of static charges can form a large amount of accumulation on the screen surface of the outer-layer insulation support frame along with the flowing of the oil (the outer-layer insulation support frame adsorbs the static charges), and the accumulation of the static charges can rise in geometric times, so that empty explosion is easily formed at the downstream end of the filter screen (between the filter screen and the outer-layer insulation support frame), the filter is broken and damaged, and even the damaged formed residues enter a mailbox and enter the hydraulic system along with the circulation of the oil to cause more serious safety accidents.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the antistatic oil return filtering device which can prevent static charges in oil from being accumulated, prevent a filter from being empty and improve the safety performance of a hydraulic system.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an antistatic oil return filter equipment, includes retaining member, filter core, protection network and metal casing, metal casing's lateral wall lower extreme is provided with a plurality of inlet ports, the lateral wall of protection network is provided with a plurality of filtration pores, filter core set up in the protection network, filter core includes the filter screen, the low reaches end of filter screen is provided with the antistatic net that is the tube-shape, antistatic net includes a plurality of weft antistatic silk and a plurality of warp antistatic silk that just are the interval setting along the circumference equipartition that just is the interval setting along the circumference equipartition along circumference equipartition, a plurality of weft antistatic silk and a plurality of warp antistatic silk weave with crisscross pressure-superposed mode and form the slice wire side, convolute the formation again the antistatic net of tube-shape.

Adopt above-mentioned scheme, after fluid produced a large amount of static charges through the filter screen, downstream end through at the filter screen sets up the antistatic network, because a plurality of weft antistatic wires and a plurality of warp antistatic wires of antistatic network can prevent that a large amount of static charges from forming on the antistatic network in the fluid and piling up, play the purpose of guide static charge, make a large amount of static charges directly get into hydraulic system's oil tank in, again because of hydraulic system's the highest oil level of oil tank can not be higher than 90% of oil tank height, make the fluid top of oil tank form the release space that is arranged in the static charge release to the air, the antistatic network effectively prevents piling up of static charge, the air explosion that has eliminated the filter takes place, hydraulic system's security performance has been improved.

As a further arrangement of the invention, the weft antistatic wires are made of metal material, the warp antistatic wires are made of antistatic PET material, and the formed sheet-shaped net surface is wound along the weft direction to form the cylindrical antistatic net.

Adopt above-mentioned scheme, the antistatic silk of weft is made by metal material, can resist the static net on the one hand and play the supporting role, prevents that the antistatic net from collapsing, and on the other hand because the antistatic net is the tube-shape, through coiling along the metal weft direction, can make the antistatic net that the coiling formed difficult extension, makes it keep the form of curling, the manufacturing and processing of the follow-up antistatic net of being convenient for. In addition, the warp is made of the antistatic PET material, the antistatic PET material has certain flexibility, so that the warp can be conveniently woven with metal weft to form a net structure, and the antistatic PET material is added with an antistatic agent in the melting process and is cooled and drawn to form a filamentous braided wire, so that the antistatic capacity of the warp can be kept for a long time, and static charges in oil can be prevented from being accumulated on the antistatic net for a long time.

As a further arrangement of the invention, the weft antistatic wires are made of 304 stainless steel materials.

Adopt above-mentioned scheme, prevent that the weft from corroding to rust, prolong antistatic network's life.

As a further arrangement of the invention, the side wall of the antistatic net is bent in a zigzag shape along the circumferential direction.

By adopting the scheme, the filtering area of the antistatic network can be increased, and the filtering speed of oil is improved.

As a further arrangement of the invention, the thickness of the weft antistatic yarn is 0.18mm, and the thickness of the warp antistatic yarn is 0.3 mm.

Adopt above-mentioned scheme, because weft adopts 304 stainless steel material to support, warp adopts antistatic PET material to make, when the anti-static net weaves, weft can crisscross with warp and fold and press, consequently can lead to the silk thread to produce extrusion deformation in folding the position, if extrusion deformation's degree is too big, can lead to the warp fracture, in order to prevent the excessive extrusion deformation of warp, need be greater than the antistatic silk of weft with the thickness of the antistatic silk of warp, but too big also leads to it to be difficult for weaving the net formation easily.

As a further arrangement of the invention, the filter element is provided with a framework at the downstream end of the antistatic network, and the framework is provided with a zinc coating.

Adopt above-mentioned scheme, be provided with the skeleton in the low reaches end of antistatic net, improve the bulk strength of crossing the filter core, be provided with the galvanizing coat on the skeleton and can prevent that the skeleton from corroding to rust.

The invention is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic exterior view of an embodiment of the present invention;

FIG. 2 is an exploded view of an embodiment of the present invention;

FIG. 3 is a cross-sectional view of an embodiment of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic view of a partial appearance of the anti-static network when unwound;

FIG. 6 is an enlarged view of portion B of FIG. 5;

FIG. 7 is a schematic diagram of the detection performed when the embodiment of the present invention is applied to the inside of the fuel tank.

Detailed Description

The specific embodiment of the invention is shown in fig. 1-7, and the antistatic oil return filtering device comprises a locking piece 1, a filter element 2, a protective net 3 and a metal shell 5, wherein the lower end of the side wall of the metal shell 5 is provided with a plurality of diffusion holes 51, the locking piece 1 is used for fixedly mounting the filtering device on an oil tank 4, the locking piece 1 is provided with an oil inlet 11, the oil outlet 12 is communicated with the inside of the filter element 2, oil enters the filtering device through the oil inlet 11 for filtering, the oil is divided through a flow dividing body (not shown in the figure) arranged inside the locking piece 1, the oil flows along the inner wall of the metal shell 5, then sequentially passes through the protective net 3 and the filter element 2 from outside to inside, then passes through the oil outlet (not shown in the figure) inside the filter element 2, diffuses the oil through the diffusion holes 51, and then flows into the oil tank 4, the flow dividing body is a flow, the lateral wall of guard net 3 is provided with a plurality of filtration pores 31, cross filter element 2 set up in the guard net 3, it is provided with filter screen 22, antistatic net 23 and skeleton 21 (skeleton 21, filter screen 22 and antistatic net 23 in the figure that this embodiment shows are simple and easy drawing method to cross filter element 2 along fluid flow direction outside-in laminating in proper order, and actual thickness is filter screen 22> skeleton 21> antistatic net 23), skeleton 21 sets up in antistatic net 23's low reaches end, be provided with the galvanizing coat on skeleton 21, antistatic net 23 sets up in filter screen 22's low reaches end, filter screen 22 comprises non-woven fabrics layer and the glass fiber layer of laying on non-woven fabrics both ends face, antistatic net 23 includes a plurality of weft antistatic silk 231 that just are the interval setting along circumference equipartition and a plurality of warp antistatic silk 232 that just are the interval setting along circumference equipartition, a plurality of weft antistatic silk 231 and a plurality of warp antistatic silk 232 weave with crisscross pressure-superposed mode and form the slice wire side that has a plurality of "well" style of calligraphy, convolute the formation again the antistatic net 23 of tube-shape.

In this embodiment, the antistatic silk 231 of weft is made by metal material, preferably adopts 304 stainless steel materials to make, can prevent that weft from corroding to rust, prolongs the life of antistatic net 23, the antistatic silk 232 of warp is made by antistatic PET material, and the slice reticulum of formation is followed the weft direction and is convoluteed and form the antistatic net 23 of tube-shape. The warp made of the antistatic PET material is prepared by the following process:

step 1: weighing an antistatic agent, ethylene glycol and terephthalic acid, wherein the mass ratio of the antistatic agent to the ethylene glycol to the terephthalic acid is 5-40: 600: 1000, wherein the antistatic agent is titanium dioxide/layered double hydroxide;

step 2: adding the antistatic agent weighed in the step 1 into ethylene glycol, uniformly mixing to obtain a mixed solution, adding the terephthalic acid weighed in the step 1 into the mixed solution, stirring under the condition of nitrogen protection atmosphere, controlling the stirring speed to be 800 r/min-1000 r/min, heating to 230-240 ℃, keeping for 2-3 h, heating to 270-280 ℃, vacuumizing to 500-510 Pa, keeping for 1-1.5 h, vacuumizing to 70-75 Pa, keeping for 2-3 h to obtain a precursor;

and step 3: adding the precursor obtained in the step 2 into an anti-adhesion screw extruder, extruding filaments while cooling by a screw to obtain 2mm thick filaments, and stretching the thick filaments to 1 mm;

and 4, step 4: and (4) performing secondary hot stretching on the 1mm silk thread obtained in the step (3) at the temperature of 215 ℃ to obtain a 0.8mm silk thread.

And 5: and (4) performing three-stage cold stretching on the 0.8mm silk thread obtained in the step (4) to obtain 0.3mm finished silk.

Through the downstream end at filter screen 22 sets up antistatic network 23, because a plurality of weft antistatic wire 231 and a plurality of warp antistatic wire 232 of antistatic network 23 can prevent that a large amount of static charges form piling up on antistatic network 23 in the fluid, play the purpose of guide static charge, make in a large amount of static charges directly get into hydraulic system's oil tank 4, again because of hydraulic system's 4 highest oil levels of oil tank can not be higher than 90% of oil tank 4 height (as shown in fig. 7), make the fluid top of oil tank 4 form the release space that is arranged in the static charge release to the air, antistatic network 23 effectively prevents piling up of static charge, the air explosion that has reduced the filter takes place, hydraulic system's security performance has been improved.

The detection device comprises: the electrostatic voltage detection equipment comprises: static electricity detector of SIMCO FMX-004

And (3) detection results:

by adopting the detection method, the common filter element and the antistatic filter element are compared, and the static charge voltage accumulation on the box body is obviously reduced after the antistatic filter element is adopted compared with the common filter element. Because filter and the inside intercommunication of box, and the outer wall coating of box has the insulating layer, the static charge on the filter can be piled up on the box inner wall at first in getting into the box usually, then release to the air in, if pile up a large amount of static charges on the filter, then also can survey the large voltage on being close to the box outer wall of filter, consequently, through the change that detects the voltage number on the box outer wall, thereby can judge that the accumulation volume of static charge in the filter is corresponding to be reduced, static charge passes through the guide effect of antistatic net 23, at first can not pile up on the filter core, then can release in the release space in oil tank 4 after oil gets into in the oil tank 4 step by step.

In this embodiment, the lateral wall of antistatic net 23 is bent along circumference with a roll over the setting of face form for increase filter area, the crease 233 of buckling is 70~80 book, can satisfy filter area, improves the filter effect.

In this embodiment, the thickness of the weft antistatic wire 231 is 0.18mm, and the thickness of the warp antistatic wire 232 is 0.3 mm.

In this embodiment, in order to further improve the safety of the filter, improve the supporting strength of the filter element, and prevent reverse accumulation of static charges formed at the upstream end of the filter screen 22, a layer of metal mesh 24 may be added between the protection mesh 3 and the filter screen 22 at the upstream end of the filter screen 22, so as to further reinforce and support the filter element, and the metal mesh 24 may improve the circulation of static charges to some extent, thereby preventing reverse accumulation of static charges.

The present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention.