Needle head filter and lower cover thereof

Abstract

The utility model belongs to the technical field of filtering tools, and provides a needle head filter and a lower cover thereof, the lower cover of the needle head filter comprises a lower cover disc body, an output pipeline and a filter membrane supporting part, the lower cover disc body is provided with a first inner cavity, and the bottom of the first inner cavity is provided with a plurality of flow channels; the output pipeline is arranged in the middle of the lower cover disc body and is communicated with the first inner cavity; the filter membrane supporting component is arranged at the input end of the output pipeline, protrudes out of the upper surfaces of the flow channels and is used for supporting a filter membrane of the needle head filter, the filter membrane supporting component divides the input end of the output pipeline into a first channel and a second channel, and the flow channels are communicated with the first channel and the second channel respectively. The filter membrane supporting component disclosed by the utility model has two functions of accelerating the flow velocity of liquid and supporting the filter membrane.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter tool technical field, in particular to a needle filter and lower cover thereof. BACKGROUND

[0002] Modern laboratory and all kinds of detection units need to carry out pretreatment to sample before the sample detection, and the appearance of needle filter provides convenience for the pretreatment of sample.

[0003] The needle filter is a disposable filter tool, which is usually used to remove particles from liquid used in sample preparation process in processes such as high performance liquid chromatography (HPLC) analysis, ion chromatography analysis or dissolution test. In other cases, the needle filter can be connected to a syringe to remove particles in a subcutaneous injection process.

[0004] Although the needle filter brings convenience for the pretreatment of sample, there are still some deficiencies. The general needle filter has low flow rate, and is broken and leaks liquid in the case of high pressure. In addition, when the pressure of the needle filter increases, the filter membrane support part cannot support the filter membrane, so that the filter membrane is broken, resulting in failure of the needle filter.

[0005] Therefore, a new scheme is needed to solve the above technical problems. SUMMARY

[0006] In view of the above-mentioned defects of the prior art, the utility model aims at providing a needle filter and lower cover thereof, which can solve the problem that the liquid flow rate and filter membrane support cannot be considered in the prior art.

[0007] To achieve the above object and other related objects, the utility model provides a needle filter lower cover, which is specifically configured as follows: comprising a lower cover disc body, an output pipeline and a filter membrane support part, the lower cover disc body is provided with a first inner cavity, and the bottom of the first inner cavity is provided with a plurality of flow channels; the output pipeline is arranged in the middle part of the lower cover disc body and communicates with the first inner cavity; the filter membrane support part is arranged at the input end of the output pipeline and protrudes from the upper surface of the flow channel, and is used for supporting the filter membrane of the needle filter; the filter membrane support part divides the input end of the output pipeline into a first channel and a second channel, and a plurality of flow channels respectively communicate with the first channel and the second channel.

[0008] Optionally, the bottom of the first inner cavity is provided with a plurality of radial grooves and annular protrusions, the annular protrusions are distributed along the radial direction of the output pipe, the radial grooves extend along the radial direction of the output pipe and divide the annular protrusions into a plurality of segments to form arc-shaped protrusions, and a first arc-shaped groove is formed between two adjacent arc-shaped protrusions along the radial direction of the output pipe, the first arc-shaped groove is communicated with the radial grooves to form the flow channel.

[0009] Optionally, the filter membrane support component comprises a first support and second supports located on both sides of the first support, the first support is arranged across the input end of the output pipe, and the width of the first support gradually decreases towards the middle part of the input end of the output pipe; and the second supports are located in the circumferential direction of the input end of the output pipe.

[0010] Optionally, the outer periphery of the first support and the second support is in the form of an arc, a second arc-shaped groove is formed between the first support and the second support, the second arc-shaped groove is communicated with the first channel or the second channel; a third arc-shaped groove is formed between the first support and the second support and the arc-shaped protrusion of the innermost ring, and the third arc-shaped groove is communicated with the flow channel and the second arc-shaped groove.

[0011] Optionally, the third arc-shaped groove is arranged opposite to one or more radial grooves, and / or the two ends of the second arc-shaped groove are communicated with one or more radial grooves.

[0012] Optionally, the first inner cavity is provided with a first annular boss in the circumferential direction, the flow channel and the filter membrane support component are located in the middle part of the first annular boss, and the first annular boss protrudes from the support surface of the filter membrane support component; and / or a limiting inclined surface is arranged on the inner circumferential sidewall of the lower cover disc body away from the output pipe, and the limiting inclined surface is inclined towards the middle part of the lower cover disc body in the direction away from the output pipe.

[0013] The utility model also provides a needle filter cover, including needle filter upper cover, filter membrane, cladding ring, and above any one of the needle filter lower cover of the utility model, the needle filter upper cover includes upper cover disc body and the input pipe of being equipped in the middle part, the upper cover disc body is equipped with the second inner cavity with the input pipe intercommunication, the first inner cavity and the second inner cavity form liquid filter cavity after the upper cover disc body and the lower cover disc body are connected, the input pipe is correspondingly arranged with the output pipe, and the output end of the input pipe is equipped with the baffle that shields partial input pipe, the filter membrane is clamped between the upper cover disc body and the lower cover disc body, and the liquid filter cavity is divided into two chambers, the cladding ring is covered in the outer periphery of the upper cover disc body and the lower cover disc body.

[0014] Optionally, the bottom of the second inner cavity is provided with at least one fixing rib connected with the baffle.

[0015] Optionally, the baffle is provided in a disc shape and is arranged in the center of the input pipe.

[0016] Optionally, a second annular boss is arranged on the outer circumferential side of the upper cover disc body away from the input pipe, an inner ring of the second annular boss is the second inner cavity, the second annular boss protrudes from the upper surface of the baffle, and when the upper cover disc body and the lower cover disc body are connected, the second annular boss abuts against the first annular boss of the lower cover of the needle filter; and / or a guide inclined surface matched with the limiting inclined surface of the lower cover of the needle filter is arranged on the outer circumferential side wall of the upper cover disc body away from the input pipe, and the guide inclined surface is inclined towards the middle part of the upper cover disc body in a direction away from the input pipe.

[0017] As described above, the needle filter and the lower cover thereof have the following beneficial effects:

[0018] By arranging the filter membrane support member at the input end of the output pipe, and the support surface of the filter membrane support member protruding from the upper surface of the flow channel arranged at the bottom of the first inner cavity of the lower cover disc body, the filter membrane is not easy to be broken under the support of the filter membrane support member when filtering the liquid, and the filter membrane does not tightly adhere to the flow channel, which is beneficial to ensure that the liquid smoothly passes through the flow channel; in addition, the filter membrane support member divides the input end of the output pipe into the first channel and the second channel, compared with the case that the input end of the output pipe is divided into two or more channels, the liquid capacity that can pass through the first channel and the second channel is larger, and the plurality of flow channels are respectively communicated with the first channel and the second channel, which is beneficial to accelerate the flow rate of the liquid, so that the filter membrane support member has the two functions of accelerating the flow rate of the liquid and supporting the filter membrane. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A structure schematic view of the lower cover of the needle filter according to the embodiment of the present application is shown;

[0020] Figure 2 A structure schematic view of the lower cover of the needle filter according to the embodiment of the present application is shown;

[0021] Figure 3 A structure schematic view of the needle filter according to the embodiment of the present application is shown;

[0022] Figure 4 A structure schematic view of the upper cover of the needle filter according to the embodiment of the present application is shown;

[0023] Figure 5The cross section structure schematic diagram of the upper cover and the lower cover of the needle filter is shown in the embodiment of the utility model.

[0024] Mark explanation

[0025] 1 - lower cover disc body; 11 - first inner cavity; 12 - radial groove; 13 - arc convex; 131 - first arc groove; 14 - first support; 15 - second support; 16 - second arc groove; 17 - third arc groove; 18 - first annular boss; 19 - limit inclined surface;

[0026] 2 - output pipeline; 21 - first channel; 22 - second channel;

[0027] 3 - needle filter upper cover; 31 - upper cover disc body; 311 - second inner cavity; 312 - baffle; 313 - fixed rib; 314 - reinforcing rib; 315 - second annular boss; 316 - guide inclined surface; 32 - input pipeline;

[0028] 4 - covering ring. Specific embodiments

[0029] The following will be described by specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. The utility model can also be implemented or applied by another different specific embodiment, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the utility model.

[0030] It should be noted that the drawings provided in the embodiment only illustrate the basic concept of the utility model in a schematic manner, and only show the components related to the utility model in the drawings, not the number, shape and size of the components when actually implemented. The shape, number and proportion of each component in actual implementation can be changed at will, and the component layout form can also be more complex. The structure, proportion, size, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the utility model. Therefore, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear description, not for limiting the scope of the utility model, and the change or adjustment of relative relationship without substantial change of technical content is also regarded as the scope of the utility model.

[0031] As Figure 1 shown, some embodiments of the present application provide a needle filter lower cover, comprising a lower cover disc body 1, an output pipe 2 and a filter membrane support component arranged in the middle of the lower cover disc body 1. The lower cover disc body 1 is provided with a first inner cavity 11, the output pipe 2 communicates with the first inner cavity 11, and the bottom of the first inner cavity 11 is provided with a plurality of flow channels. The filter membrane support component is arranged at the input end of the output pipe 2, and the support surface of the filter membrane support component protrudes from the upper surface of the flow channel, so that when the filter membrane filters the liquid, the support surface of the filter membrane support component can support the filter membrane, so that the filter membrane is not easy to break, which is beneficial to improve the service life of the filter membrane, and can avoid the filter membrane closely adhering to the flow channel, which is beneficial to ensure the smooth passing of the liquid in the flow channel.

[0032] The filter membrane support component divides the input end of the output pipe 2 into a first channel 21 and a second channel 22. Compared with the case of dividing the input end of the output pipe 2 into two or more channels, the liquid capacity that can pass through the first channel 21 and the second channel 22 is larger. Moreover, the plurality of flow channels respectively communicate with the first channel 21 and the second channel 22, which is beneficial to accelerate the flow rate of the liquid, so that the filter membrane support component has both the functions of accelerating the flow rate of the liquid and supporting the filter membrane.

[0033] In some embodiments, the bottom of the first inner cavity 11 is provided with a plurality of annular protrusions, which are distributed along the radial direction of the output pipe 2; the bottom of the first inner cavity 11 is also provided with a plurality of radial grooves 12, which extend along the radial direction of the output pipe 2, so as to divide the annular protrusions into a plurality of segments to form arc-shaped protrusions 13. Between two adjacent arc-shaped protrusions 13 along the radial direction of the output pipe 2, a first arc-shaped groove 131 is formed, which communicates with the radial groove 12 to form a flow channel.

[0034] In an application example, the annular protrusions are uniformly distributed along the radial direction of the output pipe 2. In order to accelerate the flow rate of the liquid, the width of the radial groove 12 can be set to 1mm, the width of the first arc-shaped groove 131 can be set to 0.5mm, and the depth of the radial groove 12 and the first arc-shaped groove 131 can be set to 0.6mm.

[0035] In some embodiments, the filter membrane support component comprises a first support 14 and a second support 15, wherein the second support 15 is located on both sides of the first support 14. The first support 14 is arranged across the input end of the output pipe 2, and the width of the first support 14 gradually decreases in the direction towards the middle of the input end of the output pipe 2, and the second support 15 is located in the circumferential direction of the input end of the output pipe 2, so as to increase the area through which the liquid passes in the first channel 21 and the second channel 22, thereby increasing the liquid capacity that can pass through the first channel 21 and the second channel 22, and being beneficial to accelerate the flow rate of the liquid.

[0036] In some embodiments, the outer periphery of the first support 14 and the second support 15 is arranged in a circular arc structure, and the second arc-shaped groove 16 is formed between the first support 14 and the second support 15, and the second arc-shaped groove 16 is communicated with the first channel 21 or the second channel 22. The third arc-shaped groove 17 is formed between the first support 14 and the second support 15 and the arc-shaped protrusion 13 of the innermost ring, and the third arc-shaped groove 17 communicates the flow channel with the second arc-shaped groove 16, so that the liquid in the flow channel flows into the second arc-shaped groove 16 through the third arc-shaped groove 17, and then flows into the first channel 21 and the second channel 22, thereby making the liquid in the flow channel flow into the output pipe 2. Such an arrangement is conducive to accelerating the flow rate of the liquid.

[0037] In some embodiments, the third arc-shaped groove 17 is arranged opposite to one or more radial grooves 12, that is, the outer peripheral side wall of the first support 14 and the second support 15 opposite to the arc-shaped protrusion 13 of the innermost ring is arranged opposite to one or more radial grooves 12. Since the outer peripheral side wall of the first support 14 and the second support 15 arranged opposite to the radial groove 12 is in a circular arc structure, the outer peripheral side wall of the first support 14 and the second support 15 shunts the liquid in the opposite radial groove 12. The shunted liquid then flows into the first channel 21 or the second channel 22 through the second arc-shaped groove 16, thereby prolonging the flow path of the liquid in the radial groove 12, that is, prolonging the time for the liquid in the radial groove 12 to flow into the first channel 21 or the second channel 22, which is conducive to avoiding the liquid flowing into the first channel 21 or the second channel 22 exceeding the capacity of the first channel 21 and the second channel 22, and the liquid being blocked in the first channel 21 or the second channel 22, thereby affecting the speed of the liquid flowing into the output pipe 2.

[0038] The radial groove 12 arranged opposite to the third arc-shaped groove 17 can be provided with 1, 2, 3, 4, etc. The specific number is arranged according to actual needs.

[0039] In an application example, the third arc-shaped groove 17 is arranged opposite to two radial grooves 12, so that the outer peripheral side wall of the first support 14 and the second support 15 shunts the liquid in the two radial grooves 12.

[0040] In some embodiments, the two ends of the second arc-shaped groove 16 are respectively communicated with one or more radial grooves 12, so that the liquid in the one or more radial grooves 12 can directly flow into the first channel 21 or the second channel 22 through the second arc-shaped groove 16, which is conducive to shortening the time for the liquid to flow into the output pipe 2. The two ends of the second arc-shaped groove 16 can be respectively communicated with 1, 2, 3, 4 or more radial grooves 12, and the specific number is arranged according to actual needs.

[0041] In an application example, the two ends of the second arc-shaped groove 16 are communicated with a radial groove 12 respectively, so that the liquid in the radial groove 12 can directly flow into the first channel 21 or the second channel 22.

[0042] In an application example, the first support 14 and the second support 15 are arranged in a flush manner, and the support surface of the first support 14 and the second support 15 is 0.1 mm higher than the upper surface of the arc-shaped protrusion 13.

[0043] In some embodiments, the lower cover disc body 1, the output pipeline 2, the filter membrane support component and the arc-shaped protrusion 13 are integrally formed.

[0044] As shown in FIGS. 1, 2 and 3, the needle filter according to some embodiments of the present application comprises a lower cover 1, an output pipeline 2, a filter membrane support component and an arc-shaped protrusion 13. Figure 3 and Figure 4 As shown in FIGS. 1, 2 and 3, the needle filter according to some embodiments of the present application comprises a lower cover 1, an output pipeline 2, a filter membrane support component and an arc-shaped protrusion 13.

[0045] The filter membrane is clamped between the upper cover disc body 31 and the lower cover disc body 1, and divides the liquid filtering cavity into two chambers. One of the chambers is communicated with the input pipeline 32, and the other chamber is communicated with the output pipeline 2, so that the filter membrane filters the liquid flowing in through the input pipeline 32, and the filtered liquid flows out through the output pipeline 2.

[0046] The input pipeline 32 is arranged corresponding to the output pipeline 2, and the output end of the input pipeline 32 is provided with a baffle 312. The baffle 312 can shield part of the input pipeline 32, so as to divide the liquid flowing into the liquid filtering cavity through the input pipeline 32, reduce the impact of the liquid flowing through the input pipeline 32 on the filter membrane, and be beneficial to prolong the service life of the filter membrane and reduce the support demand of the filter membrane on the filter membrane support component.

[0047] The cover ring 4 covers the outer periphery of the upper cover disc body 31 and the lower cover disc body 1, so as to fix the upper cover disc body 31 and the lower cover disc body 1, and be beneficial to avoid the leakage of the liquid in the liquid filtering cavity through the gap between the upper cover disc body 31 and the lower cover disc body 1.

[0048] In some embodiments, the bottom of the second inner cavity 311 is provided with at least one fixing rib 313 connected with the baffle 312, and the baffle 312 is fixed at the output end of the input pipeline 32 through the fixing rib 313. The fixing rib 313 can be provided with one, two, three, four or the like, and the specific number is arranged according to actual demand.

[0049] In some embodiments, when there are two fixed ribs 313, the two fixed ribs 313 can be oppositely arranged or arranged at any angle. When there are more than two fixed ribs 313, the multiple fixed ribs 313 can be evenly distributed along the circumference of the upper cover disc body 31 or distributed at any angle.

[0050] In an application example, four fixed ribs 313 are arranged, two by two oppositely arranged, and the adjacent two fixed ribs 313 are arranged perpendicularly.

[0051] In some embodiments, the baffle plate 312 is arranged in a disc shape and is arranged in the center of the input pipe 32 to uniformly distribute the liquid flowing out of the input pipe 32, so that the distributed liquid exerts uniform impact force on the filter membrane, which is beneficial to improve the service life of the filter membrane.

[0052] In an application example, the diameter of the baffle plate 312 can be 2.03 mm.

[0053] In some embodiments, the bottom of the second inner cavity 311 is provided with multiple reinforcing ribs 314 distributed along the circumference of the upper cover disc body 31 to improve the structural strength of the upper cover disc body 31.

[0054] As shown in Figure 2 and Figure 5 In some embodiments, the circumference of the bottom of the first inner cavity 11 of the lower cover disc body 1 is provided with a first annular boss 18, and the circumference of the side of the upper cover disc body 31 away from the input pipe 32 is provided with a second annular boss 315, and the inner circle of the second annular boss 315 is the second inner cavity 311. When the upper cover disc body 31 and the lower cover disc body 1 are connected, the second annular boss 315 abuts on the first annular boss 18 to limit the relative position of the upper cover disc body 31 and the lower cover disc body 1, and the first inner cavity 11 and the second inner cavity 311 form a liquid filtering cavity.

[0055] The flow channel and the filter membrane support part are located in the middle of the first annular boss 18, and the first annular boss 18 protrudes from the support surface of the filter membrane support part, and the second annular boss 315 protrudes from the upper surface of the baffle plate 312, so that when the upper cover disc body 31 and the lower cover disc body 1 are connected, the baffle plate 312 will not abut on the filter membrane support part.

[0056] In some embodiments, a limiting slope 19 is arranged on the inner circumferential side wall of the lower cover disc body 1 away from the output pipeline 2, and the limiting slope 19 is inclined towards the middle part of the lower cover disc body 1 in the direction away from the output pipeline 2. A guide slope 316 is arranged on the outer circumferential side wall of the upper cover disc body 31 away from the input pipeline 32, and the guide slope 316 is inclined towards the middle part of the upper cover disc body 31 in the direction away from the input pipeline 32. When the upper cover disc body 31 and the lower cover disc body 1 are connected, the upper cover disc body 31 is inserted into the first inner cavity 11 of the lower cover disc body 1 through the guide slope 316, and cooperates with the limiting slope 19 to clamp the upper cover disc body 31 on the lower cover disc body 1.

[0057] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A needle filter lower cap characterized by, The application relates to a needle filter lower cover. The first inner cavity is provided with a plurality of radial grooves and annular protrusions, the annular protrusions are distributed along the radial direction of the output pipeline, the radial grooves extend along the radial direction of the output pipeline and divide the annular protrusions into a plurality of arc-shaped protrusions to form first arc-shaped grooves between two adjacent arc-shaped protrusions along the radial direction of the output pipeline, and the first arc-shaped grooves are communicated with the radial grooves to form the flow channels. The filter membrane support component comprises a first support and second supports located on both sides of the first support, the first support is arranged across the input end of the output pipeline, and the width of the first support gradually decreases in the direction towards the middle part of the input end of the output pipeline; and the second supports are located in the circumferential direction of the input end of the output pipeline. The outer circumferences of the first support and the second supports are arc structures, a second arc-shaped groove is formed between the first support and the second support, the second arc-shaped groove is communicated with the first channel or the second channel, a third arc-shaped groove is formed between the first support and the second support and the arc-shaped protrusion of the innermost ring, and the third arc-shaped groove communicates the flow channel with the second arc-shaped groove.

2. The needle filter lower cover of claim 1, wherein: The third arc-shaped groove is arranged opposite to one or more radial grooves, and / or the two ends of the second arc-shaped groove are respectively communicated with one or more radial grooves.

3. The needle filter lower cover of claim 2, wherein: A first annular boss is arranged on the circumferential direction of the bottom of the first inner cavity, the flow channel and the filter membrane support component are located in the middle part of the first annular boss, the first annular boss protrudes from the support surface of the filter membrane support component, and a limiting inclined surface is arranged on the inner circumferential side wall of the lower cover body away from the output pipeline, and the limiting inclined surface is inclined towards the middle part of the lower cover body in the direction away from the output pipeline.

4. The needle filter lower cover of claim 3, wherein: The application relates to a needle filter lower cover.

5. The needle filter lower cover of claim 4, wherein: The application relates to a needle filter lower cover.

6. The needle filter lower cap of any of claims 1-5, wherein: The application relates to a needle filter lower cover.

7. A needle filter, characterized by The second inner cavity is provided with at least one fixing rib connected with the baffle. ​ ​ ​ ​ 8. The needle filter of claim 7, wherein: ​ 9. The needle filter of claim 8, wherein: The baffle is arranged in a disc shape and is arranged in the center of the input pipe.

10. The needle filter of claim 8 or 9, wherein: The upper cover disc body is provided with a second annular boss on the outer circumferential side away from the input pipe, an inner ring of the second annular boss is the second inner cavity, the second annular boss protrudes from the upper surface of the baffle, when the upper cover disc body and the lower cover disc body are connected, the second annular boss is abutted on the first annular boss of the lower cover of the needle filter; and / or a guide inclined surface matched with the limiting inclined surface of the lower cover of the needle filter is arranged on the outer circumferential side wall of the upper cover disc body away from the input pipe, the guide inclined surface is inclined towards the middle part of the upper cover disc body in the direction away from the input pipe.

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