Unidirectional sealing mobile phase safety cover

Abstract

The utility model discloses a one-way sealing mobile phase safety cover which comprises an upper inner cover, a lower inner cover and an outer cover, the cover surface of the outer cover is provided with a through hole for the lower inner cover to penetrate out, and the lower part of the lower inner cover extends outwards to be provided with a lower inner cover limit; the upper inner cover covers the upper part of the lower inner cover; mutually communicated air holes are respectively formed in the upper inner cover and the lower inner cover; a one-way valve is arranged in the air hole of the lower inner cover; a plurality of pipeline holes are respectively formed in the cover surfaces of the upper inner cover and the lower inner cover, and the pipeline holes in the upper inner cover and the lower inner cover are communicated in a one-to-one correspondence manner; and mobile phase pipelines are inserted into the pipeline holes of the upper inner cover and the lower inner cover. The one-way sealing mobile phase safety cover has good sealing performance, a plurality of mobile phase pipelines can penetrate through the one-way sealing mobile phase safety cover, internal pressure and external pressure of a container can be balanced through the one-way sealing mobile phase safety cover, and air which enters the container and is used for balancing the internal pressure and the external pressure can be filtered.

Description

Technical Field

[0001] The utility model belongs to the technical field of laboratory devices, and in particular relates to a one-way sealed mobile phase safety cover. Background Art

[0002] At present, a mobile phase bottle is usually provided with a through hole on the bottle cap, and the mobile phase pipeline is passed through the through hole on the bottle cap to ensure the pressure balance inside and outside the bottle, so that the mobile phase reagent can flow out normally.

[0003] Chinese Patent: A mobile phase bottle cap ZL202321692530.8 discloses a mobile phase bottle cap, which includes an outer cover and an inner cover. Among them, a number of mobile phase pipeline holes are opened on the inner cover, and a duckbill valve is installed under the pipeline hole; the outer cover and the inner cover can be assembled and installed by a snap-on structure. When a mobile phase pipeline passes through, the pipeline hole and the duckbill valve can accommodate the mobile phase pipeline and maintain a relatively closed state. When no mobile phase pipeline passes through, the reverse structure of the duckbill valve can reduce the volatilization of the reagent in the mobile phase bottle; the forward structure can ensure that external air enters the bottle, so that the pressure in the bottle is balanced and the mobile phase reagent can flow out normally.

[0004] The above-mentioned mobile phase bottle cap has the following defects: 1) The main function of the duckbill valve is to ensure the pressure balance inside and outside the bottle. When the mobile phase tube is inserted into the pipeline hole, the duckbill valve is also inserted at the same time, so that the function of the duckbill valve to maintain the pressure balance inside and outside the bottle disappears, and the duckbill valve itself cannot be used as a seal. The mobile phase tube is inserted into the duckbill valve, causing the duckbill valve to deform, and there is a risk of reduced air tightness. At this time, another duckbill valve is needed to maintain the pressure balance inside and outside the bottle, that is, at least one pipeline hole must be left on the mobile phase bottle cap that is not used to insert the mobile phase pipeline. 2) During the process of plugging and unplugging the mobile phase tube, the duckbill valve is easily contaminated, and the liquid in the bottle may even be brought out during the plugging and unplugging process. 3) Repeatedly plugging and unplugging the mobile phase tube from the duckbill valve can easily cause plastic deformation of the valve mouth of the duckbill valve, thereby reducing the sealing of the bottle cap. Utility Model Content

[0005] The utility model aims to provide a one-way sealed mobile phase safety cover, which has good sealing performance and can allow multiple mobile phase pipelines to pass through. The pressure inside and outside the container can be balanced through the safety cover, and the air entering the container for balancing the internal and external pressures can also be filtered.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is to design a one-way sealed mobile phase safety cover, comprising an upper inner cover, a lower inner cover and an outer cover; the cover surface of the outer cover is provided with a through hole for the lower inner cover to pass through, and the lower inner cover is provided with a lower inner cover limiter on the outer extension of the lower part of the lower inner cover; the upper inner cover covers the upper part of the lower inner cover; the upper inner cover and the lower inner cover are respectively provided with air holes that are interconnected, and a one-way valve is provided in the air hole of the lower inner cover; a plurality of pipeline holes are respectively provided on the cover surfaces of the upper inner cover and the lower inner cover, and the pipeline holes on the upper inner cover and the lower inner cover are connected one by one; the mobile phase pipeline is inserted into the pipeline holes of the upper inner cover and the lower inner cover.

[0007] Furthermore, the outflow end of the one-way valve faces downward, and the inflow end of the one-way valve is covered with a filter membrane; a limiting platform for limiting the filter membrane is provided on the inner side of the upper inner cover.

[0008] Furthermore, a gasket is arranged on the end surface of the limiting platform facing the filter membrane, and the gasket abuts against the extension of the filter membrane.

[0009] Furthermore, a step for placing a sealing ring is provided on the upper portion of the pipeline hole of the lower inner cover, and the outer wall of the mobile phase pipeline passes through the sealing ring.

[0010] Furthermore, it also includes a plurality of positioning pins; a plurality of positioning pin holes are respectively provided on the inner side of the upper inner cover and the cover surface of the lower inner cover, and the two ends of the plurality of positioning pins are respectively pinned into the positioning pin holes on the inner side of the upper inner cover and the cover surface of the lower inner cover.

[0011] Furthermore, the connection method between the upper inner cover and the lower inner cover includes but is not limited to the following two methods: Option 1: A snap-on hook is provided on the inner wall of the upper inner cover, and a lower inner cover snap-on groove is provided on the outer wall of the lower inner cover; the snap-on hook is snapped into the snap-on groove of the lower inner cover to realize the snap connection between the upper inner cover and the lower inner cover. Option 2: The upper inner cover and the lower inner cover are connected by a screw connection, and when the upper inner cover and the lower inner cover are screwed to the extreme position, the pipeline holes of the upper inner cover and the lower inner cover are connected one by one.

[0012] Furthermore, a lower inner cover boss is provided on the lower end surface of the lower inner cover, and the side wall of the lower inner cover boss is an oblique slope surface, which is used for linear sealing with the inner diameter end of the vessel mouth.

[0013] Furthermore, a lower inner cover boss is provided on the lower end surface of the lower inner cover, and a cover inner gasket is provided on the outer edge of the lower inner cover boss.

[0014] Furthermore, the air inlet end of the air hole of the upper inner cover is arranged on the side wall of the upper inner cover, and the air outlet end of the air hole of the upper inner cover is connected to the air hole of the lower inner cover.

[0015] The advantages and beneficial effects of the utility model are:

[0016] 1) The upper inner cover and the lower inner cover are connected by snap connection or screw connection, which has good air tightness.

[0017] 2) When the mobile phase pipeline passes through the pipeline hole, a sealing ring is sheathed on the outer wall of the mobile phase pipeline to further improve the air tightness.

[0018] 3) The one-way valve is used to adjust the pressure balance inside and outside the container. The one-way valve will not be contaminated by the liquid in the container and can be removed and replaced.

[0019] 4) A filter membrane is also provided on the upper part of the one-way valve to filter the air entering the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of Example 1.

[0021] Figure 2 This is an exploded view of Example 1.

[0022] Figure 3 This is a schematic diagram of the upper inner cover of Example 1.

[0023] Figure 4 This is a schematic diagram of the front end of the lower inner cover of Example 1.

[0024] Figure 5 This is a schematic diagram of the rear end of the lower inner cover of Example 1.

[0025] Figure 6 It is a schematic diagram of the front and cross-section AA of Example 1.

[0026] Figure 7 It is a schematic diagram of the front and cross-section BB of Example 1.

[0027] Figure 8 This is an exploded view of Example 2.

[0028] Fig. 9 It is a schematic diagram of the front and cross-section CC of Example 2.

[0029] Fig.10 This is a schematic diagram of the structure of Example 3.

[0030] Fig.11 It is a schematic diagram of the front and cross-section DD of Example 3.

[0031] Among them, the upper inner cover 1, the upper inner cover pipeline hole 1-1, the upper inner cover air hole 1-2, the upper inner cover positioning pin hole 1-3, the limit platform 1-4, the snap hook 1-5, the snap block 1-6, the lower inner cover 2, the lower inner cover pipeline hole 2-1, the lower inner cover air hole 2-2, the lower inner cover positioning pin hole 2-3, the lower inner cover limit 2-4, the lower inner cover slot 2-5, the lower inner cover boss 2-6, the L-shaped slot 2-7, the outer cover 3, the one-way valve 4, the sealing ring 5, the gasket 6, the positioning pin 7, the filter membrane 8, and the gasket inside the cover 9. DETAILED DESCRIPTION

[0032] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0033] Embodiment 1:

[0034] The one-way sealing mobile phase safety cover is composed of an upper inner cover 1, a lower inner cover 2 and an outer cover 3. The cover surface of the outer cover 3 is provided with a through hole for the lower inner cover 2 to pass through, and a lower inner cover limiter 2-4 is provided on the lower extension of the lower inner cover 2 to prevent the lower inner cover 2 from slipping out of the through hole on the cover surface of the outer cover 3 from bottom to top; the upper inner cover 1 covers the upper part of the lower inner cover 2.

[0035] An upper inner cover air hole 1-2 and a lower inner cover air hole 2-2 are respectively provided in the center of the cover surface of the upper inner cover 1 and the lower inner cover 2, and the upper inner cover air hole 1-2 and the lower inner cover air hole 2-2 are connected; a one-way valve 4 is provided in the lower inner cover air hole 2-2, and the outflow end of the one-way valve 4 faces downward, and the inflow end of the one-way valve 4 is covered with a filter membrane 8; a limit platform 1-4 is provided in the center of the inner side of the upper inner cover 1, and a gasket 6 is provided on the end surface of the limit platform 1-4 facing the filter membrane 8; the gasket 6 presses against the extension of the filter membrane 8.

[0036] A plurality of upper inner cover pipeline holes 1-1 and lower inner cover pipeline holes 2-1 are respectively provided on the cover surfaces of the upper inner cover 1 and the lower inner cover 2; and the upper inner cover pipeline holes 1-1 and the lower inner cover pipeline holes 2-1 are connected one by one; and a plurality of mobile phase pipelines can pass through the upper inner cover pipeline holes 1-1 and the lower inner cover pipeline holes 2-1 one by one.

[0037] A step is provided on the upper part of the pipeline hole 2 - 1 of the lower inner cover for placing a sealing ring 5 , and the outer wall of the mobile phase pipeline passes through the sealing ring 5 .

[0038] A plurality of upper inner cover positioning pin holes 1-3 and lower inner cover positioning pin holes 2-3 are respectively provided on the inner side of the upper inner cover 1 and the cover surface of the lower inner cover 2; the two ends of a plurality of positioning pins 7 are respectively pinned into the upper inner cover positioning pin holes 1-3 and the lower inner cover positioning pin holes 2-3.

[0039] A snap hook 1-5 is provided on the inner wall of the upper inner cover 1, and a lower inner cover snap groove 2-5 is provided on the outer wall of the lower inner cover 2; the snap hook 1-5 is snapped into the lower inner cover snap groove 2-5 to realize the snap connection between the upper inner cover 1 and the lower inner cover 2.

[0040] A lower inner cover boss 2-6 is provided on the lower end surface of the lower inner cover 2, and the side wall of the inner cover boss 2-6 is an oblique slope surface, which is used for linear sealing with the inner diameter end of the container mouth.

[0041] Embodiment 2:

[0042] Embodiment 2 is improved on the basis of embodiment 1, and the snap-in hooks 1-5 and the lower inner cover snap-in slots 2-5 are eliminated; a plurality of snap-in blocks 1-6 are provided on the inner wall of the upper inner cover 1, and a plurality of L-shaped snap-in slots 2-7 are provided on the outer wall of the lower inner cover 2; the connection between the upper inner cover 1 and the lower inner cover 2 is realized by rotating the snap-in blocks 1-6 and snapping them into the L-shaped snap-in slots 2-7.

[0043] This structure eliminates the positioning pin 7, the upper inner cover positioning pin hole 1-3 and the lower inner cover positioning pin hole 2-3. Therefore, it should be ensured that when the clamping block 1-6 is rotated and clamped to the extreme position of the L-shaped clamping groove 2-7, the upper inner cover pipeline hole 1-1 and the lower inner cover pipeline hole 2-1 are matched and connected, so as to ensure that the mobile phase pipeline can smoothly pass through the upper inner cover pipeline hole 1-1 and the lower inner cover pipeline hole 2-1 in sequence.

[0044] A lower inner cover boss 2-6 is provided on the lower end surface of the lower inner cover 2, and a cover inner gasket 9 is provided on the outer edge of the lower inner cover boss 2-6 for one-way sealing when the mobile phase safety cover is connected to the glass vessel opening and fits against the upper edge of the glass vessel opening.

[0045] Embodiment 3:

[0046] The air inlet end of the upper inner cover air hole 1-2 is arranged on the side wall of the upper inner cover 1, and the air outlet end of the upper inner cover air hole 1-2 is connected to the lower inner cover air hole 2-2. The benefit of this design is that dust in the air is easily deposited on the cover surface of the upper inner cover 1, and is easy to block the air inlet end of the upper inner cover air hole 1-2 in Examples 1 and 2, and setting the air inlet end of the upper inner cover air hole 1-2 on the side wall of the upper inner cover 1 can reduce the probability of blocking the air inlet end.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A one-way sealed mobile phase safety cover, with a plurality of mobile phase pipelines passing through the cover surface, characterized in that: It comprises an upper inner cover, a lower inner cover and an outer cover; the cover surface of the outer cover is provided with a through hole for the lower inner cover to pass through, and a lower inner cover limiter is provided on the lower extension of the lower inner cover; the upper inner cover covers the upper part of the lower inner cover; the upper inner cover and the lower inner cover are respectively provided with air holes that are interconnected, and a one-way valve is provided in the air hole of the lower inner cover; the cover surfaces of the upper inner cover and the lower inner cover are respectively provided with a plurality of pipeline holes, and the pipeline holes on the upper inner cover and the lower inner cover are connected one by one; mobile phase pipelines are inserted into the pipeline holes of the upper inner cover and the lower inner cover.

2. A one-way sealing mobile phase safety cover according to claim 1, characterized in that: The outflow end of the one-way valve faces downward, and the inflow end of the one-way valve is covered with a filter membrane; a limiting platform for limiting the filter membrane is provided on the inner side of the upper inner cover.

3. A one-way sealing mobile phase safety cover according to claim 2, characterized in that: A gasket is arranged on the end surface of the limiting platform facing the filter membrane, and the gasket abuts against the extension of the filter membrane.

4. The one-way sealing mobile phase safety cover according to claim 1, characterized in that: A step for placing a sealing ring is provided on the upper part of the pipeline hole of the lower inner cover, and the outer wall of the mobile phase pipeline passes through the sealing ring.

5. The one-way sealing mobile phase safety cover according to claim 1, characterized in that: It also includes a plurality of positioning pins; a plurality of positioning pin holes are respectively arranged on the inner side of the upper inner cover and the cover surface of the lower inner cover, and the two ends of the plurality of positioning pins are respectively pinned into the positioning pin holes on the inner side of the upper inner cover and the cover surface of the lower inner cover.

6. The one-way sealing mobile phase safety cover according to claim 1, characterized in that: A snap-on hook is arranged on the inner wall of the upper inner cover, and a lower inner cover snap-on groove is arranged on the outer wall of the lower inner cover; the snap-on hook is snapped into the lower inner cover snap-on groove to realize snap connection between the upper inner cover and the lower inner cover.

7. The one-way sealing mobile phase safety cover according to claim 1, characterized in that: The upper inner cover and the lower inner cover are connected by a screw connection, and when the upper inner cover and the lower inner cover are screwed to the limit position, the pipeline holes of the upper inner cover and the lower inner cover are connected one by one.

8. The one-way sealing mobile phase safety cover according to claim 1, characterized in that: The lower end surface of the lower inner cover is provided with a lower inner cover boss, and the side wall of the lower inner cover boss is an oblique slope surface, which is used for linear sealing with the inner diameter end of the container mouth.

9. The one-way sealing mobile phase safety cover according to claim 1, characterized in that: The lower end surface of the lower inner cover is provided with a lower inner cover boss, and the outer edge of the lower inner cover boss is provided with a cover inner gasket.

10. The one-way sealing mobile phase safety cover according to claim 1, characterized in that: The air inlet end of the upper inner cover air hole is arranged on the side wall of the upper inner cover, and the air outlet end of the upper inner cover air hole is connected to the lower inner cover air hole.

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