Filter element of filter and filter

Abstract

The utility model provides a filter element and filter, relates to filter technical field, filter element includes upper end cover, lower end cover, inner tube, outer tube and filter layer structure, outer tube is sleeved outside the inner tube, lower end cover is connected to outer tube and one end of inner tube, upper end cover is connected to outer tube and the other end of inner tube, filter layer structure is connected to outer tube and the other end of inner tube. The upper end cover is provided with a connecting hole used for being connected with a connector, the connecting hole is communicated with the inner pipe, the inner pipe and the outer pipe are each provided with a plurality of filtering holes, the filtering layer structure is arranged between the outer pipe and the inner pipe and comprises a first filtering layer and a second filtering layer which are arranged from outside to inside, and the diameter of the filtering holes in the first filtering layer is larger than that of the filtering holes in the second filtering layer. According to the utility model, the inner pipe and the outer pipe are used as main supporting structures to bear the pressure brought by bidirectional flow of hydraulic oil to the filter element, so that the overall structural strength of the filter element is improved, the filter element can bear the pressure difference generated by the bidirectional flow of the hydraulic oil, and the structure of the filter element is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technology field, specifically, relate to a filter filter core and filter. BACKGROUND

[0002] Various impurities appearing in the hydraulic system are filtered mainly through the filter, and the sources mainly have mechanical impurities such as water rust, cast sand, welding slag and iron filings still remaining in the hydraulic system after cleaning. The basic filtering mechanism of the filter is physical screening, and the filter core realizes physical interception of the pollutants in the oil liquid according to the gap size. One end of the existing filter core is connected with the connector, and the design can only withstand the one-way pressure difference from the outside of the filter core to the connector direction, and cannot withstand the reverse pressure difference. When the flow through the filter core instantaneously increases or the oil flow reverses, the filter core will be crushed and damaged, and the damaged filter core enters the system as a pollutant, causing more serious pollution. SUMMARY

[0003] The problem to be solved by the utility model is how to improve the structural stability of the filter core.

[0004] Therefore, the utility model provides a filter filter core, which comprises an upper end cover, a lower end cover, an inner tube, an outer tube and a filter layer structure, the outer tube is sleeved outside the inner tube, the lower end cover is connected with one end of the outer tube and the inner tube, the upper end cover is connected with the other end of the outer tube and the inner tube, a connecting hole for being connected with a connector is formed in the upper end cover, the connecting hole is communicated with the inner tube, a plurality of filter holes are formed in the inner tube and the outer tube, the filter layer structure is arranged between the outer tube and the inner tube, the filter layer structure comprises a first filter layer and a second filter layer arranged from outside to inside, and the diameter of the filter hole in the first filter layer is greater than that of the filter hole in the second filter layer.

[0005] Optionally, the first filter layer is made of non-woven fabric, and the second filter layer is made of glass fiber filter material.

[0006] Optionally, the filter layer structure further comprises an outer support net and an inner support net, the outer support net is arranged between the outer tube and the first filter layer, and the inner support net is arranged between the inner tube and the second filter layer.

[0007] Optionally, the outer support net and the inner support net are both nylon support nets.

[0008] Optionally, the filter layer structure further comprises a stainless steel wire mesh, and the stainless steel wire mesh is arranged between the inner tube and the inner support net.

[0009] Optionally, a sealing groove is formed in the hole wall of the connecting hole, and a sealing ring is arranged in the sealing groove.

[0010] Optionally, the upper end cover lower surface is provided with an upper connecting groove, the lower end cover upper surface is provided with a lower connecting groove, the outer tube, the filter layer structure and one end of the inner tube are inserted into the upper connecting groove, and the outer tube, the filter layer structure and the other end of the inner tube are inserted into the lower connecting groove.

[0011] Optionally, the two ends of the outer tube, the filter layer structure and the inner tube are respectively glued to the upper connecting groove and the lower connecting groove.

[0012] Optionally, the upper connecting groove and the lower connecting groove are annular grooves, the inner side wall bottom of the upper connecting groove and the inner side wall bottom of the lower connecting groove are provided with glue grooves extending towards the inner tube central axis direction.

[0013] Compared with the prior art, the filter cartridge of the utility model has the beneficial effects that:

[0014] The utility model discloses a inner tube and outer tube are set up, and the diameter of outer tube is greater than the diameter of inner tube, and the outer tube is set on the outside of inner tube, and is coaxial arrangement, and the side away from the central axis of inner tube and outer tube is outside, and the side towards the central axis of inner tube and outer tube is inside, and inner tube and outer tube are the support structure of filter core, and filter layer structure is set between inner tube and outer tube, and filter layer structure plays the role of filtering, and the lower end cover is arranged on one side of outer tube and inner tube, and the lower end cover seals one side of inner tube and outer tube, and the upper end cover is arranged on the other side of outer tube and inner tube, and the upper end cover is provided with connecting hole, and one end of connecting hole is communicated with inner tube, and the other end is connected with joint, and a plurality of filter holes are formed in inner tube and outer tube, and when working normally, hydraulic oil is from the outside of outer tube through the filter hole on outer tube, filter layer structure, filter hole on inner tube, enters the inside of inner tube, and then enters hydraulic system through joint, and filter layer structure includes first filter layer on the outside and second filter layer on the inside, and the filter hole diameter on first filter layer is greater than the filter hole diameter on second filter layer, that is to say, second filter layer is more compact than first filter layer, and second filter layer can filter smaller impurities, and hydraulic oil passes through first filter layer and second filter layer in turn, and improves the filtering effect, and in the process, outer tube is the main support structure, and bears the pressure of hydraulic oil flow to filter core, and outer tube can also bear the instantaneous increased hydraulic pressure, and when hydraulic oil flows reversely, inner tube is the main support structure, and bears the pressure of hydraulic oil flow to filter core, and improves the structural strength of filter core as a whole, and makes filter core bear the pressure difference produced by the bidirectional flow of hydraulic oil, and makes the filter core structure more stable.

[0015] In addition, in order to solve the above problems, the utility model also provides a filter, including any one of the above-mentioned filter.

[0016] Compared with the prior art, the filter of the utility model has the beneficial effects and the beneficial effects of the above-mentioned filter are basically the same, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Structure diagram of the filter core of the embodiment of the present application is shown in the figure.

[0018] Figure 2 Structure diagram of the upper end cover of the embodiment of the present application is shown in the figure.

[0019] Figure 3 Structure diagram of the lower end cover of the embodiment of the present application is shown in the figure. Figure 2 Enlarged view of the middle Ⅱ.

[0020] Figure 4 Structure diagram of the lower end cover of the embodiment of the present application is shown in the figure.

[0021] Figure 5 Structure diagram of the lower end cover of the embodiment of the present application is shown in the figure. Figure 4 Enlarged view of the middle Ⅰ.

[0022] Explanation of the reference signs:

[0023] 1-upper end cover; 11-connecting hole; 12-sealing groove; 13-upper connecting groove; 2-lower end cover; 21-lower connecting groove; 3-inner tube; 4-outer tube; 5-filter layer structure; 51-first filter layer; 52-second filter layer; 53-outer support net; 54-inner support net; 55-wire mesh; 6-sealing ring; 7-gum groove. DETAILED DESCRIPTION

[0024] In order to make the above purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0025] It should be noted that in the description of the present application, the directions or position relationships indicated by "up", "down", "left", "right", "top", "bottom", "front", "back", "inner" and "outer" are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0026] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0027] Moreover, while specific embodiments of the application have been described herein, it is understood that these embodiments are merely examples of the principles and application of the application. It is understood that many modifications can be made to the example embodiments described herein, and that other arrangements can be devised without departing from the spirit and scope of the application as defined by the appended claims. It is understood that features described in relation to one embodiment can be combined with features described in relation to other embodiments. It is also understood that features described in relation to separate embodiments can be used in combination.

[0028] To solve the above problems, as shown in Figure 1 , Figure 2 and Figure 4 The utility model provides a filter filter core, including upper end cover 1, lower end cover 2, inner tube 3, outer tube 4 and filter layer structure 5, the outer tube 4 is set in the outer side of inner tube 3, lower end cover 2 is connected in the outer tube 4 with inner tube 3 one end, upper end cover 1 is connected in the outer tube 4 with inner tube 3 the other end, be equipped with the connecting hole 11 for being connected with the joint on upper end cover 1, the connecting hole 11 with inner tube 3 intercommunication, the inner tube 3 with the outer tube 4 all is equipped with a plurality of filter holes, filter layer structure 5 sets up between the outer tube 4 with inner tube 3, filter layer structure 5 includes by the first filter layer 51 and second filter layer 52 setting from outside to inside, the diameter of filter hole on first filter layer 51 is greater than the diameter of filter hole on second filter layer 52.

[0029] In the embodiment, the inner tube 3 and the outer tube 4 are arranged, the diameter of the outer tube 4 is greater than that of the inner tube 3, the outer tube 4 is sleeved outside the inner tube 3, and the outer tube 4 is coaxially arranged. The side away from the center axis of the inner tube 3 and the outer tube 4 is the outer side, and the side toward the center axis of the inner tube 3 and the outer tube 4 is the inner side. The inner tube 3 and the outer tube 4 are the support structure of the filter element. The filter layer structure 5 is arranged between the inner tube 3 and the outer tube 4. The filter layer structure plays a filtering role. The lower end cover 2 is arranged on one side of the outer tube 4 and the inner tube 3. The lower end cover 2 seals one side of the inner tube 3 and the outer tube 4. The upper end cover 1 is arranged on the other side of the outer tube 4 and the inner tube 3. The upper end cover 1 is provided with a connecting hole 11. One end of the connecting hole 11 is in communication with the inner tube 3, and the other end is connected with a joint. A plurality of filter holes are arranged on the inner tube 3 and the outer tube 4. In normal operation, the hydraulic oil enters the inner tube 3 from the outer side of the outer tube 4 through the filter holes on the outer tube 4, the filter layer structure 5 and the filter holes on the inner tube 3, and then enters the hydraulic system through the joint. The filter layer structure 5 includes a first filter layer 51 on the outer side and a second filter layer 52 on the inner side. The filter hole diameter of the first filter layer 51 is greater than that of the second filter layer 52. That is, the second filter layer 52 is more compact than the first filter layer 51. The second filter layer 52 can filter smaller impurities. The hydraulic oil passes through the first filter layer 51 and the second filter layer 52 in sequence, improving the filtering effect. In this process, the outer tube 4 serves as the main support structure and bears the pressure of the hydraulic oil flow to the filter element. The outer tube 4 can also bear the instantaneous increase in hydraulic pressure. When the hydraulic oil flows in the opposite direction, the inner tube 3 serves as the main support structure and bears the pressure of the hydraulic oil flow to the filter element. The overall structural strength of the filter element is improved, so that the filter element can bear the pressure difference generated by the bidirectional flow of the hydraulic oil, and the filter element structure is more stable.

[0030] Optionally, the first filter layer 51 is made of non-woven fabric, and the second filter layer 52 is made of glass fiber filter material.

[0031] In the embodiment, the first filter layer 51 is made of non-woven fabric, and the second filter layer 52 is made of glass fiber filter material. The glass fiber filter material is more compact than the non-woven fabric, which is convenient for filtering smaller impurities. The hydraulic oil first passes through the non-woven fabric and then passes through the glass fiber filter material, so that larger impurities do not impact the glass fiber filter material, improving the service life of the glass fiber filter material.

[0032] Optionally, as shown in Figure 1 The filter layer structure 5 further includes an outer support net 53 and an inner support net 54. The outer support net 53 is arranged between the outer tube 4 and the first filter layer 51. The inner support net 54 is arranged between the inner tube 3 and the second filter layer 52.

[0033] In the embodiment, the outer support net 53 is arranged between the outer tube 4 and the first filter layer 51, and the inner support net 54 is arranged between the inner tube 3 and the second filter layer 52, so as to improve the structural strength of the filter element and enable the filter element to withstand the pressure generated by the bidirectional flow or sudden increase of the hydraulic oil.

[0034] Optionally, the outer support net 53 and the inner support net 54 are nylon support nets.

[0035] In the embodiment, the inner support net 54 and the outer support net 53 are made of nylon, which has high strength and wear resistance and is convenient for bearing the pressure generated by the hydraulic oil.

[0036] Optionally, as shown in Figure 1 the filter layer structure 5 further comprises a stainless steel wire net 55 arranged between the inner tube 3 and the inner support net 54.

[0037] In the embodiment, the stainless steel wire net 55 is arranged between the inner tube 3 and the inner support net 54, so as to further improve the structural strength of the filter element and enable the filter element to withstand the pressure generated by the reverse flow of the hydraulic oil.

[0038] Specifically, the inner tube 3 and the outer tube 4 are made of stainless steel, and the wire net 55 can be welded on the inner tube 3, so as to improve the overall structural stability of the filter element.

[0039] Optionally, as shown in Figure 2 a sealing groove 12 is arranged on the hole wall of the connecting hole 11, and a sealing ring 6 is arranged in the sealing groove 12.

[0040] In the embodiment, the sealing groove 12 is arranged on the hole wall of the connecting hole 11, and the sealing ring 6 is arranged in the sealing groove 12, so that when the connector is inserted into the connecting hole 11, the sealing ring 6 plays a sealing role between the connector and the hole wall of the connecting hole 11, thereby improving the sealing performance of the connection between the connector and the filter element.

[0041] Optionally, as shown in Figure 2 and Figure 4 an upper connecting groove 13 is arranged on the lower surface of the upper end cover 1, and a lower connecting groove 21 is arranged on the upper surface of the lower end cover 2, one end of the outer tube 4, the filter layer structure 5 and the inner tube 3 is inserted into the upper connecting groove 13, and the other end of the outer tube 4, the filter layer structure 5 and the inner tube 3 is inserted into the lower connecting groove 21.

[0042] In the embodiment, the upper connecting groove 13 is an annular groove, and when connected, the outer tube 4, the filter layer structure 5 and one end of the inner tube 3 are inserted into the upper connecting groove 13 to complete the connection with the upper end cover 1.

[0043] Optionally, the two ends of the outer tube 4, the filter layer structure 5 and the inner tube 3 are respectively glued to the upper connecting groove 13 and the lower connecting groove 21.

[0044] In the embodiment, the two ends of the outer tube 4, the filter layer structure 5 and the inner tube 3 are glued to the upper connecting groove 13 and the lower connecting groove 21, which on the one hand improves the stability of the connection between the upper end cover 1, the lower end cover 2 and the outer tube 4, the filter layer structure 5 and the inner tube 3, and on the other hand, the glue can prevent hydraulic oil from leaking and improve the sealing of the filter element.

[0045] Optionally, as shown in the figure, Figures 2 to 5 The inner side wall bottom of the upper connecting groove 13 and the inner side wall bottom of the lower connecting groove 21 are both provided with a glue groove 7 extending towards the central axis of the inner tube 3.

[0046] In the embodiment, the glue groove 7 extending inwards is arranged at the inner side wall bottom of the upper connecting groove 13 and the lower connecting groove 21, and when the outer tube 4, the filter layer structure 5 and the inner tube 3 are glued to the upper connecting groove 13 and the lower connecting groove 21, the glue can extend into the glue groove 7, improving the sealing of the glue joint and the surface roughness of the upper connecting groove 13 and the lower connecting groove 21, and enhancing the pulling force of the glue on the outer tube 4, the filter layer structure 5 and the inner tube 3.

[0047] Another embodiment of the utility model provides a filter, comprising the filter element of the above.

[0048] Compared with the prior art, the filter of the embodiment has approximately the same beneficial effects as the filter element described above, and details are not repeated here.

[0049] Although the utility model discloses as above, the protection scope of the utility model is not limited to this only. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will all fall into the protection scope of the utility model.

Claims

1. A filter element, characterized in that, The device includes an upper end cap (1), a lower end cap (2), an inner tube (3), an outer tube (4), and a filter layer structure (5). The outer tube (4) is sleeved on the outside of the inner tube (3). The lower end cap (2) is connected to one end of the outer tube (4) and the inner tube (3). The upper end cap (1) is connected to the other end of the outer tube (4) and the inner tube (3). The upper end cap (1) has a connection hole (11) for connecting with a connector. The connection hole (11) communicates with the inner tube (3). Both the inner tube (3) and the outer tube (4) have multiple filter holes. The filter layer structure (5) is located between the outer tube (4) and the inner tube (3). The filter layer structure (5) includes a first filter layer (51) and a second filter layer (52) arranged from the outside to the inside. The diameter of the filter holes on the first filter layer (51) is larger than the diameter of the filter holes on the second filter layer (52).

2. The filter element according to claim 1, characterized in that, The first filter layer (51) is made of non-woven fabric, and the second filter layer (52) is made of glass fiber filter material.

3. The filter element according to claim 1, characterized in that, The filter layer structure (5) further includes an outer support net (53) and an inner support net (54). The outer support net (53) is disposed between the outer tube (4) and the first filter layer (51), and the inner support net (54) is disposed between the inner tube (3) and the second filter layer (52).

4. The filter element according to claim 3, characterized in that, Both the outer support net (53) and the inner support net (54) are nylon support nets.

5. The filter element according to claim 3, characterized in that, The filter layer structure (5) also includes a stainless steel wire mesh (55), which is disposed between the inner tube (3) and the inner support mesh (54).

6. The filter element according to claim 1, characterized in that, A sealing groove (12) is provided on the wall of the connecting hole (11), and a sealing ring (6) is provided in the sealing groove (12).

7. The filter element according to claim 1, characterized in that, The upper end cap (1) has an upper connecting groove (13) on its lower surface, and the lower end cap (2) has a lower connecting groove (21) on its upper surface. One end of the outer tube (4), the filter layer structure (5), and the inner tube (3) is inserted into the upper connecting groove (13), and the other end of the outer tube (4), the filter layer structure (5), and the inner tube (3) is inserted into the lower connecting groove (21).

8. The filter element according to claim 7, characterized in that, The outer tube (4), the filter layer structure (5), and the inner tube (3) are respectively glued to the upper connecting groove (13) and the lower connecting groove (21).

9. The filter element according to claim 8, characterized in that, Both the upper connecting groove (13) and the lower connecting groove (21) are annular grooves. The bottom of the inner wall of the upper connecting groove (13) and the bottom of the inner wall of the lower connecting groove (21) are provided with a glue groove (7) extending toward the central axis of the inner tube (3).

10. A filter, characterized in that, Includes the filter element as described in any one of claims 1 to 9.

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