Filter

Abstract

The utility model discloses a filter which comprises an upper cover, a lower cover and a filter membrane, and the upper cover is provided with a first filter channel; a second filtering channel corresponding to the first filtering channel is formed in the lower cover, the lower cover comprises a filtering supporting piece and a lower cover body, the filtering supporting piece is arranged in the second filtering channel and fixedly connected with the lower cover body, and the upper cover and the lower cover body are connected in a clamped mode; and the filter membrane is fixed between the upper cover and the lower cover. According to the technical scheme, the upper cover body and the lower cover body are clamped, and the filtering membrane is fixed between the upper cover and the lower cover through the clamping effect between the upper cover body and the lower cover body, so that the filtering area of the filter is increased, and the filtering efficiency of the filter can be improved during filtering.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering, in particular to a filter. Background Art

[0002] Chromatography is also called chromatography. It is a high-performance physical separation technology. When it is used in analytical chemistry and combined with appropriate detection methods, it becomes chromatographic analysis. With the development of technology, high-performance liquid chromatography has become the main method of chromatographic analysis due to its fast analysis speed, high separation efficiency, and automation. Before performing high-performance liquid chromatography, it is usually necessary to filter the solution to prevent impurities from clogging the chromatographic column.

[0003] At present, patent CN220834964U discloses a needle filter, including an upper shell, a lower shell, a filter membrane layer, and a gasket, wherein the upper shell is provided with a liquid inlet channel, the lower shell is sealed and connected to the upper shell, and the lower shell is provided with a liquid outlet channel; the filter membrane layer is provided between the upper shell and the lower shell; the gasket is provided downstream of the filter membrane, and the gasket at least partially overlaps with the outer edge of the filter membrane layer. Compared with the prior art, the gasket is provided on the downstream side of the filter membrane layer, so that a buffer cavity is formed between the filter membrane layer and the lower shell, so that the permeate can enter the guide surface faster, thereby improving the discharge efficiency of the permeate.

[0004] However, this filter has a smaller filtration cross-sectional area and lower filtration efficiency. Utility Model Content

[0005] The main purpose of the utility model is to provide a filter, aiming to increase the filtering area of ​​the filter and improve the filtering efficiency of the filter.

[0006] To achieve the above-mentioned purpose, the filter proposed by the utility model comprises:

[0007] An upper cover, wherein a first filtering channel is provided on the upper cover;

[0008] A lower cover, wherein a second filter channel corresponding to the first filter channel is formed on the lower cover, the lower cover comprises a filter support and a lower cover body, the filter support is disposed in the second filter channel and is fixedly connected to the lower cover body, and the upper cover and the lower cover body are snap-connected; and

[0009] The filter membrane is fixed between the upper cover and the lower cover.

[0010] Optionally, a convex ring is provided on the upper surface of the lower cover body, and a ring groove for snap-fitting with the convex ring is provided on the upper cover.

[0011] Optionally, the outer diameter of an end of the convex ring close to the upper cover is greater than the outer diameter of an end of the convex ring away from the upper cover;

[0012] The outer diameter of the side of the annular groove close to the lower cover is smaller than the outer diameter of the end of the annular groove away from the upper cover.

[0013] Optionally, a positioning ring platform is extended from the inner side of the convex ring, and a positioning ring groove matching with the positioning ring platform is opened on the upper cover.

[0014] Optionally, at least one filter press convex ring is provided on the upper surface of the lower cover body and located inside the convex ring; and the filter membrane is fixed between the lower surface of the upper cover and the filter press convex ring.

[0015] Optionally, the upper cover includes a filter pressing piece and an upper cover body, the filter pressing piece is arranged in the first filter channel and fixedly connected to the upper cover body; the annular groove is opened on the lower surface of the upper cover body.

[0016] Optionally, the filter pressing member further includes at least one pressing ring and at least two pressing connecting strips fixedly connected to the pressing ring and the upper cover body.

[0017] Optionally, there are two compression rings;

[0018] Or, the number of compression connecting strips is six;

[0019] Alternatively, a clamping ring is perpendicular to a clamping connecting strip.

[0020] Optionally, the filter support member includes at least one supporting ring and at least two supporting connecting strips fixedly connected to the supporting ring and the lower cover body.

[0021] Optionally, there are four supporting rings;

[0022] Or, there are six supporting connecting strips;

[0023] Or, a supporting ring is perpendicular to a supporting connecting bar.

[0024] The technical solution of the utility model increases the filtering area of ​​the filter by adopting the clamping of the upper cover and the lower cover body and fixing the filter membrane between the upper cover and the lower cover body through the clamping action between the upper cover and the lower cover body, and can improve the filtering efficiency of the filter during filtering. By arranging the filtering channel and the filtering support between the lower cover body, the filtering membrane can be supported during filtering, and the pressure bearing capacity of the filter during filtering can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 The structure of the filter embodiment of the utility model is shown in FIG. Figure 1 ;

[0027] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0028] Figure 3 The structure of the filter embodiment of the utility model is shown in FIG. Figure 2 ;

[0029] Figure 4 for Figure 3 Schematic diagram of the cross-section structure in the middle BB direction;

[0030] Figure 5 for Figure 4 A partial enlarged view of point C in the middle.

[0031] The main component symbols are described as follows:

[0032] 1. Upper cover; 11. First filter channel; 12. Filter pressing member; 121. Pressing ring; 122. Pressing connecting strip; 13. Upper cover body; 131. Ring groove; 2. Lower cover; 21. Second filter channel; 22. Filter support member; 221. Supporting ring; 222. Supporting connecting strip; 23. Lower cover body; 231. Convex ring; 232. Positioning ring platform; 233. Filter pressing convex ring.

[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] The utility model provides a filter.

[0039] In the embodiment of the present utility model, Figures 1 to 5 As shown, the filter comprises: an upper cover 1, a lower cover 2 and a filter membrane, the upper cover 1 is provided with a first filter channel 11; the lower cover is provided with a second filter channel 21 corresponding to the first filter channel 11, the lower cover 2 comprises a filter support 22 and a lower cover body 23, the filter support 22 is arranged in the second filter channel 21 and is fixedly connected to the lower cover body 23, the upper cover 1 and the lower cover body 23 are clamped; the filter membrane is fixed between the upper cover 1 and the lower cover 2. Among them, the upper cover 1 and the lower cover 2 are clamped.

[0040] The technical solution of the utility model increases the filtering area of ​​the filter by adopting the clamping of the upper cover 1 and the lower cover body 23 and fixing the filter membrane between the upper cover 1 and the lower cover 2 by the clamping action between the upper cover 1 and the lower cover body 23, which can improve the filtering efficiency of the filter during filtering. By arranging the filtering channel and the filtering support 22 between the lower cover body 23, it is possible to support the filter membrane during filtering and improve the pressure that the filter can withstand during filtering. By fixing the filter membrane between the upper cover 1 and the lower cover 2 by the clamping action between the upper cover 1 and the lower cover body 23, it is possible to assemble the filter through a simple structure and realize the function of filtering the solution.

[0041] Specifically, in order to improve the structural strength of the filter and enhance the connection force between the upper cover 1 and the lower cover 2, a convex ring 231 is provided on the upper surface of the lower cover body 23, and the upper cover 1 is provided with an annular groove 131 which is snap-fitted with the convex ring 231. The upper cover 1 and the lower cover 2 are snap-fitted with each other through the mutual cooperation between the convex ring 231 and the annular groove 131.

[0042] Specifically, in order to further improve the structural strength of the filter and further improve the connection force between the upper cover 1 and the lower cover 2, the outer diameter of the end of the convex ring 231 close to the upper cover 1 is larger than the outer diameter of the end of the convex ring 231 away from the upper cover 1; the outer diameter of the side of the annular groove 131 close to the lower cover 2 is smaller than the outer diameter of the end of the annular groove 131 away from the lower cover 2.

[0043] Specifically, in order to facilitate positioning when the upper cover 1 and the lower cover 2 are installed, a positioning ring stage 232 is extended inside the convex ring 231 , and a positioning ring groove matching with the positioning ring stage 232 is opened on the upper cover 1 .

[0044] Specifically, in order to better fix the filter membrane and improve the friction between the filter membrane and the upper cover 1 and the lower cover 2, at least one filter press convex ring 233 is provided on the upper surface of the lower cover body 23 and inside the convex ring 231; the filter membrane is fixed between the lower surface of the upper cover 1 and the filter press convex ring 233. The height of the filter press convex ring is greater than the difference between the height of the positioning switch 232 and the depth of the positioning ring groove.

[0045] Specifically, in order to limit and fix the filter membrane, the upper cover 1 includes a filter pressing member 12 and an upper cover body 13. The filter pressing member 12 is disposed in the first filter channel 11 and fixedly connected to the upper cover body 13. The annular groove 131 is formed on the lower surface of the upper cover body 13.

[0046] Specifically, in order to further limit and fix the filter membrane, the filter pressing member 12 further includes at least one pressing ring 121 and at least two pressing connecting strips 122 fixedly connected to the pressing ring 121 and the upper cover body 13 .

[0047] Specifically, in order to further limit and fix the filter membrane, there are two clamping rings 121 and six clamping connecting strips 122;

[0048] Specifically, in order to improve the structural strength between the clamping ring 121 and the clamping connecting strip 122 , one clamping ring 121 is perpendicular to one clamping connecting strip 122 .

[0049] Specifically, in order to further improve the support force of the filter membrane during filtration and further improve the filter's ability to withstand pressure during filtration, the filter support 22 includes at least one support ring 221 and at least two support connecting strips 222 fixedly connected to the support ring 221 and the lower cover body 23.

[0050] Specifically, in order to further improve the support force of the filter membrane during filtration and further improve the pressure that the filter can withstand during filtration, there are four support rings 221; or, there are six support connecting strips 222; during installation, the support connecting strips 222 and the clamping connecting strips 122 can be made correspondent to each other to increase the filtration area; the first clamping ring 121 from the outside to the inside is the same size as the second support ring 221 from the outside to the inside.

[0051] Specifically, in order to improve the structural strength between the supporting ring 221 and the supporting connecting bar 222 , one supporting ring 221 is perpendicular to one supporting connecting bar 222 .

[0052] The assembly principle of the filter of the utility model is as follows: when assembling the filter, the filter membrane is placed on the support ring 221, the support connecting strip 222, and the filter press convex ring 233, and the edge of the filter membrane is located on the filter press convex ring 233 and the positioning ring platform 232; then the upper cover body 13, the clamping ring 121 and the clamping connecting strip 122 are placed above the lower cover 2; then the convex ring 231 is inserted into the ring groove 131, so that the positioning ring platform 232 is just engaged with the positioning ring groove, so that the filter membrane is fixed between the filter press convex ring 233 and the lower surface of the upper cover body 13, thereby realizing the assembly of the filter.

[0053] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A filter, characterized in that: include: An upper cover (1), wherein a first filtering channel (11) is provided on the upper cover (1); a lower cover (2), wherein a second filter channel (21) corresponding to the first filter channel (11) is formed on the lower cover, the lower cover (2) comprises a filter support member (22) and a lower cover body (23), the filter support member (22) is arranged in the second filter channel (21) and is fixedly connected to the lower cover body (23), and the upper cover (1) and the lower cover body (23) are snap-connected; and A filter membrane is fixed between the upper cover (1) and the lower cover (2).

2. The filter according to claim 1, characterized in that The upper surface of the lower cover body (23) is provided with a convex ring (231), and the upper cover (1) is provided with a ring groove (131) which is snap-fitted with the convex ring (231).

3. The filter according to claim 2, characterized in that The outer diameter of the end of the convex ring (231) close to the upper cover (1) is greater than the outer diameter of the end of the convex ring (231) away from the upper cover (1); The outer diameter of the side of the annular groove (131) close to the upper cover (1) is smaller than the outer diameter of the end of the annular groove (131) away from the upper cover (1).

4. The filter according to claim 2, characterized in that A positioning ring platform (232) is extended inside the convex ring (231), and a positioning ring groove matching the positioning ring platform (232) is provided on the upper cover (1).

5. The filter according to claim 2, characterized in that At least one filter press convex ring (233) is provided on the upper surface of the lower cover body (23) and located inside the convex ring (231); the filter membrane is fixed between the lower surface of the upper cover (1) and the filter press convex ring (233).

6. The filter according to any one of claims 2 to 5, characterized in that The upper cover (1) comprises a filter pressing piece (12) and an upper cover body (13); the filter pressing piece (12) is arranged in the first filter channel (11) and is fixedly connected to the upper cover body (13); and the annular groove (131) is provided on the lower surface of the upper cover body (13).

7. The filter according to claim 6, characterized in that The filter pressing member (12) further comprises at least one pressing ring (121) and at least two pressing connecting strips (122) fixedly connected to the pressing ring (121) and the upper cover body (13).

8. The filter according to claim 7, characterized in that There are two pressing rings (121); Or, the number of the compression connecting strips (122) is six; Alternatively, one of the clamping rings (121) is perpendicular to one of the clamping connecting strips (122).

9. The filter according to claim 1, 2, 3, 4, 5, 7 or 8, characterized in that The filter support (22) comprises at least one supporting ring (221) and at least two supporting connection strips (222) fixedly connected to the supporting ring (221) and the lower cover body (23).

10. The filter according to claim 9, characterized in that There are four supporting rings (221); Or, the number of the supporting connecting bars (222) is six; Alternatively, one of the supporting rings (221) is perpendicular to one of the supporting connecting strips (222).

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