Unidirectional sealing and flowing combined cover

Abstract

The utility model discloses a one-way sealing flow combined cover which comprises an upper cover, a pressing assembly, an inner core and a lower cover. The inner core is connected with the lower cover, the pressing assembly is connected with the upper cover, the upper cover is connected with the inner core in a screwed mode, and the pressing assembly is pushed to extrude towards the inner core in the process that the upper cover is screwed into the inner core. The inner core and the pressing assembly are provided with a plurality of pipeline holes which can be communicated with one another and used for insertion of pipelines. The lower end of the pipeline hole of the pressing assembly is provided with a sealing end which can elastically deform with the hole wall of the pipeline hole of the inner core after being extruded and can clamp a pipeline inserted into the pipeline hole. According to the one-way sealing flow combined cover, the conical surface sealing end of the compression part is embedded into the conical surface of the pipeline hole of the inner core to form sealing, and all the parts can be detached and are convenient to replace or clean.

Description

Technical Field

[0001] The utility model belongs to the technical field of experimental instruments, and in particular relates to a one-way sealing flow combination cover. Background Art

[0002] Currently, mobile phase bottles generally have a through hole opened on the bottle cap, and the mobile phase pipeline is passed through the through hole on the bottle cap to ensure pressure balance inside and outside the bottle, thereby allowing the mobile phase reagent to 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-fit ​​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 airtightness. 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) In the process of plugging and unplugging the mobile phase tube, the duckbill valve is easily contaminated, and even the liquid in the bottle may 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.

[0005] Furthermore, existing mobile phase caps typically only fit rigid PTFE tubing, as the diameter of the tubing hole must be slightly smaller than the outer diameter of the inserted tubing to achieve a seal. Furthermore, insertion is difficult, especially with tubing of varying diameters, non-circular cross-sections, or deformation during insertion. Furthermore, inserting flexible tubing, such as silicone tubing, into the tubing hole is even more challenging.

[0006] In summary, the design requirements for mobile phase bottle caps are to ensure smooth liquid discharge while providing maximum sealing. The cap components should be removable for easy replacement or cleaning. Furthermore, the cap design should minimize the use of vulnerable and corrosive parts. While maximizing the lifespan of the cap, the material safety and environmental considerations should also be fully considered. Utility Model Content

[0007] The purpose of the utility model is to provide a one-way sealing flow combination cover, which has good sealing performance. The conical sealing end of the compression member is embedded in the conical surface of the pipeline hole of the inner core to form a seal, and each component can be disassembled for easy replacement or cleaning.

[0008] In order to achieve the above-mentioned purpose, the technical solution of the present invention is to design a one-way sealed flow combination cover, including an upper cover, a clamping assembly, an inner core and a lower cover; the inner core is connected to the lower cover, the clamping assembly is connected to the upper cover, the upper cover is screwed to the inner core, and the clamping assembly is pushed toward the inner core during the process of the upper cover being screwed into the inner core; the inner core and the clamping assembly are provided with a plurality of pipeline holes for inserting pipelines that can penetrate each other; the lower end of the pipeline hole of the clamping assembly is provided with a hole wall of the inner core pipeline hole that can undergo elastic deformation after extrusion and can clamp the sealing end of the pipeline inserted into the pipeline hole.

[0009] Furthermore, the sealing end of the compression assembly is tapered, forming a conical surface where the wall of the inner core's pipeline hole and the sealing end are squeezed. When the compression assembly's sealing end is not squeezed, its diameter is slightly larger than the outer diameter of the pipeline. When the compression assembly's sealing end and the inner core's pipeline hole are squeezed and deformed, the diameter of the sealing end decreases, clamping the inserted pipeline and effectively forming a seal. The tapered surface and the tapered sealing end are more closely matched, which helps improve airtightness.

[0010] Furthermore, both the upper cover and the lower cover are threaded covers with through holes on the cover surface and threads on the inner wall; the upper part of the clamping assembly is embedded in the through hole of the upper cover, and the lower part of the inner core is embedded in the through hole of the lower cover.

[0011] Furthermore, a limiting structure is provided on the upper portion of the clamping assembly to prevent the clamping assembly from falling out of the through hole of the upper cover and to not restrict the upper cover from rotating relative to the clamping assembly.

[0012] Furthermore, positioning holes are provided on the pressing assembly and the inner core, and positioning pins are inserted into the positioning holes.

[0013] Furthermore, the clamping assembly includes a clamping member and a compression member, and the clamping member and the compression member are respectively provided with a number of corresponding pipeline holes; the upper surface of the compression member and the lower surface of the clamping member are in contact with each other; the lower surface of the clamping member is provided with a connecting rod, and the compression member is provided with a connecting hole for the connecting rod to pass through; the end of the connecting rod is provided with a limiting structure, which prevents the clamping member and the compression member from detaching; the compression member is made of elastic material as a whole.

[0014] Furthermore, the inner core is provided with a connecting rod groove into which the connecting rod of the compression member extends. The connecting rod serves both as a connection between the compression member and the compression member, as well as a positioning and guiding function. A retaining structure on the connecting rod prevents the connecting rod from falling out of the connecting hole, thereby achieving the combination of the compression member and the compression member. The connecting rod is aligned with the connecting rod groove of the inner core and cooperates with the positioning pin to achieve a positioning function.

[0015] Furthermore, the cross section of the connecting rod end is non-circular, and the connecting rod embedding groove on the inner core is a non-circular hole that matches the connecting rod end. With this structure, the positioning pin and positioning hole can be eliminated, and the positioning function can be achieved solely by the connecting rod and the connecting rod embedding groove.

[0016] Furthermore, a positioning groove is provided at the lower end of the pipeline hole of the compression member, and a positioning protrusion is provided at the upper end of the pipeline hole of the compression member that can match the positioning groove, which can prevent dislocation.

[0017] Furthermore, the compression assembly and the inner core are provided with air inlet holes that penetrate each other.

[0018] Furthermore, an air intake component placement groove is provided at the front end of the air intake hole of the inner core; an air intake component is provided in the air intake component placement groove; the air intake component includes a film pressing ring, a filter membrane, and a one-way valve, the film pressing ring is located on the upper part of the filter membrane, and the one-way valve is located on the lower part of the filter membrane.

[0019] The advantages and beneficial effects of the utility model are:

[0020] 1) The sealing end of the compression piece is embedded in the conical surface of the pipeline hole of the inner core to form a seal with good sealing performance.

[0021] 2) The upper cover and the inner core are connected by threads, and the tightness of the compression member and the inner core can be adjusted by screwing the upper cover, thereby adjusting the air tightness.

[0022] 3) The deformation of the sealing end of the compression piece also squeezes the pipe wall of the pipe inserted into the pipe hole, clamping the pipe, which not only improves the air tightness but also fixes the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the present utility model.

[0024] Figure 2 This is a schematic diagram of the first decomposed state of the present invention.

[0025] Figure 3 This is a schematic diagram of the second decomposition state of the utility model.

[0026] Figure 4 This is a plan view of the utility model in an exploded state.

[0027] Figure 5 Schematic diagram of section AA.

[0028] Figure 6 Schematic diagram of section BB.

[0029] Figure 7 Schematic diagram of section CC.

[0030] Figure 8 Schematic diagram of the pressing part and the compression part.

[0031] Figure 9 Schematic diagram of the compression member and inner core of Example 2.

[0032] Among them, the upper cover 1, the pressing part 2, the first pipeline hole 2-1, the connecting rod 2-2, the upper cover limit 2-3, the compression part 3, the second pipeline hole 3-1, the conical sealing end 3-2, the connecting hole 3-3, the inner core 4, the connecting rod embedding groove 4-1, the third pipeline hole 4-2, the conical surface 4-2-1, the lower cover limit 4-3, the lower cover 5, the positioning pin 6, the film pressing ring 7, the filter membrane 8, the one-way valve 9, the positioning hole 10, the air inlet hole 11, and the air inlet component placement groove 11-1. DETAILED DESCRIPTION

[0033] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0034] Example 1:

[0035] like Figures 1 to 8 As shown, the one-way sealed flow combination cover includes an upper cover 1, a pressing part 2, a compression part 3, an inner core 4 and a lower cover 5; the upper cover 1 and the lower cover 5 are both threaded covers with through holes set on the cover surface and threads set on the inner wall.

[0036] The pressing piece 2 is in the shape of a disc, and the upper part of the pressing piece 2 is embedded in the through hole of the upper cover 1; the upper and lower edges of the side walls of the pressing piece 2 are provided with upper cover limiters 2-3 for clamping the hole walls of the through hole of the upper cover 1 to prevent the pressing piece 2 from falling out of the through hole of the upper cover 1.

[0037] like Figures 4 to 7 As shown, the upper cover limiter 2-3 may include a limit ring located on the upper side wall of the pressing member 2 and a boss located on the lower side wall of the pressing member 2. The boss and limit ring have diameters larger than the through hole diameter of the upper cover 1. When the upper cover 1 is squeezed by an external force, causing the through hole of the upper cover 1 to pass through the limit ring, the cover surface of the upper cover 1 is then constrained between the boss and the limit ring.

[0038] The compression member 3 is in the shape of a disc and is made of elastic material as a whole. The upper surface of the compression member 3 fits the lower surface of the pressing member 2. A connecting rod 2-2 is provided on the lower surface of the pressing member 2, and a connecting hole 3-3 for the connecting rod 2-2 to pass through is provided on the compression member 3. A limiting structure is provided at the end of the connecting rod 2-2 to ensure that when the connecting rod 2-2 passes through the connecting hole 3-3, the compression member 3 and the pressing member 2 are combined together and do not separate.

[0039] The inner core 4 is a cylindrical structure, and a lower cover limit 4-3 is provided at the lower end of the side wall of the inner core 4. The lower end of the inner core 4 is embedded in the through hole of the lower cover 5, and the lower cover limit 4-3 at the lower end of the side wall of the inner core 4 forms a limit with the through hole wall of the lower cover 5 to prevent the lower part of the inner core 4 from falling out of the through hole of the lower cover 5.

[0040] like Figures 4 to 7 As shown, the lower cover stopper 4-3 may include a boss located at the bottom of the inner core 4 with a diameter larger than the diameter of the through hole of the lower cover 5, and a stop ring located in the middle of the inner core 4 with a diameter larger than the diameter of the hole of the lower cover 5. When the lower cover 5 is squeezed by an external force, the through hole of the lower cover 5 passes through the stop ring, and the cover surface of the lower cover 5 is then constrained between the boss and the stop ring.

[0041] The upper end of the side wall of the inner core 4 is provided with an external thread that matches the inner wall thread of the upper cover 1; on the pressing piece 2, the compression piece 3, and the inner core 4, a plurality of first pipeline holes 2-1, second pipeline holes 3-1, and third pipeline holes 4-2 are evenly arranged around the central axis; the pressing piece 2, the compression piece 3, and the inner core 4 are also provided with a positioning hole 10 and an air inlet hole 11; the inner core 4 is provided with a connecting rod embedding groove 4-1 for the connecting rod 2-2 of the pressing piece 2 to extend into.

[0042] A positioning groove 2-1-1 is provided at the lower hole end of the first pipeline hole 2-1, and a positioning protrusion 3-1-1 is provided at the upper hole end of the second pipeline hole 3-1; when the upper surface of the compression member 3 and the lower surface of the pressing member 2 are in contact, the positioning protrusion 3-1-1 is embedded in the positioning groove 2-1-1, which has the function of preventing dislocation.

[0043] On the lower surface of the compression member 3, a conical sealing end 3-2 is provided at the position of the second pipeline hole 3-1, and the inner wall of the end of the third pipeline hole 4-2 of the inner core 4 is a conical surface 4-2-1; when the lower surface of the compression member 3 is in contact with the upper surface of the inner core 4, the conical sealing end 3-2 of the compression member 3 is embedded in the conical surface 4-2-1 of the third pipeline hole 4-2 of the inner core 4, so that the aperture of the conical sealing end 3-2 is contracted, thereby clamping the pipeline and forming a seal on the outer wall of the pipeline.

[0044] When the pressing part 2, the compression part 3, and the inner core 4 are fitted together, they are positioned by inserting the positioning pin 6 into the positioning hole 10; an air intake component placement groove 11-1 is provided at the front end of the air intake hole 11 of the inner core 4, and an air intake component is provided in the air intake component placement groove 11-1; the air intake component includes a film pressing ring 7, a filter membrane 8, and a one-way valve 9, the film pressing ring 7 is located on the upper part of the filter membrane 8, and the one-way valve 9 is located at the lower part of the filter membrane 8.

[0045] Assembly process and working principle of one-way sealing flow combination cover:

[0046] 1) Place the air intake assembly into the air intake assembly placement groove 11-1, the lower part of the inner core 4 is embedded in the through hole of the lower cover 5, and the pressing piece 2 is embedded in the through hole of the upper cover 1; the upper surface of the compression piece 3 and the lower surface of the pressing piece 2 are fitted together, and are fixed by the connecting rod 2-2 passing through the connecting hole 3-3; the lower surface of the compression piece 3 is fitted together with the upper surface of the inner core 4. At this time, the first pipeline hole 2-1, the second pipeline hole 3-1, and the third pipeline hole 4-2 are connected, and the positioning pin 6 is pinned into the positioning hole 10 to position the pressing piece 2, the compression piece 3, and the inner core 4. The connecting rod 2-2 is inserted into the connecting rod embedding groove 4-1 and also plays a positioning role; the upper cover 1 is lightly screwed to the inner core 4.

[0047] 2) Install the above-mentioned combined cover on the mobile phase bottle, that is, threadably connect the lower cover 5 with the threaded opening of the mobile phase bottle; insert the pipeline into the first pipeline hole 2-1, the second pipeline hole 3-1, and the third pipeline hole 4-2 in sequence until it extends into the bottle; continue to screw the upper cover 1 toward the inner core 4. During the screwing process, the conical sealing end 3-2 of the compression member 3 is embedded in the conical surface 4-2-1 of the third pipeline hole 4-2 of the inner core 4, causing the aperture of the conical sealing end 3-2 to shrink, thereby clamping the pipeline and forming a seal on the outer wall of the pipeline.

[0048] 3) The liquid in the mobile phase bottle is transferred outward through the pipeline, and at the same time, the air pressure in the bottle is balanced through the air inlet assembly.

[0049] Example 2:

[0050] On the basis of Example 1, the positioning pin 6 and the positioning hole 10 are eliminated; the front end cross-section of the connecting rod 2-2 is square, and the connecting rod groove 4-1 of the inner core 4 is a square hole that matches the front end of the connecting rod 2-2; when the connecting rod 2-2 is extended into the connecting rod groove 4-1, the connecting rod 2-2 plays a positioning and guiding role, so that the clamping assembly will not be horizontally deflected relative to the inner core.

[0051] 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A one-way sealed flow combination cover, characterized in that: It includes an upper cover, a clamping assembly, an inner core and a lower cover; the inner core is connected to the lower cover, the clamping assembly is connected to the upper cover, the upper cover is screwed to the inner core, and when the upper cover is screwed into the inner core, the clamping assembly is pushed toward the inner core and squeezed; the inner core and the clamping assembly are provided with a plurality of pipeline holes that can penetrate each other for inserting pipelines; the lower end of the pipeline hole of the clamping assembly is provided with a hole wall that can undergo elastic deformation with the inner core pipeline hole after squeezing, and can clamp the sealing end of the pipeline inserted into the pipeline hole.

2. The one-way sealing flow combination cover according to claim 1, characterized in that: The sealing end of the pressing assembly is tapered, and the area where the hole wall of the pipeline hole of the inner core and the sealing end are squeezed is a tapered surface.

3. The one-way sealing flow combination cover according to claim 1, characterized in that: The upper cover and the lower cover are both provided with through holes on the cover surface, and the inner wall is provided with a threaded cover; the upper part of the pressing component is embedded in the through hole of the upper cover, and the lower part of the inner core is embedded in the through hole of the lower cover.

4. The one-way sealing flow combination cover according to claim 3, characterized in that: The upper portion of the pressing assembly is provided with a limiting structure which prevents the pressing assembly from falling out of the through hole of the upper cover and does not restrict the upper cover from rotating relative to the pressing assembly.

5. The one-way sealing flow combination cover according to claim 1, characterized in that: The clamping assembly includes a clamping part and a compression part, and the clamping part and the compression part are respectively provided with a number of corresponding pipeline holes; the upper surface of the compression part and the lower surface of the clamping part are in contact with each other; the lower surface of the clamping part is provided with a connecting rod, and the compression part is provided with a connecting hole for the connecting rod to pass through; the end of the connecting rod is provided with a limiting structure.

6. The one-way sealing flow combination cover according to claim 5, characterized in that: The inner core is provided with a connecting rod embedding groove for the connecting rod of the pressing piece to extend into.

7. The one-way sealing flow combination cover according to claim 6, characterized in that: The cross section of the end portion of the connecting rod is non-circular, and the connecting rod embedding groove on the inner core is a non-circular hole that matches the end portion of the connecting rod.

8. The one-way sealing flow combination cover according to claim 1, characterized in that: Positioning holes are provided on the pressing assembly and the inner core, and positioning pins are inserted into the positioning holes.

9. The one-way sealing flow combination cover according to claim 5, characterized in that: The lower end of the pipeline hole of the pressing piece is provided with a positioning groove, and the upper end of the pipeline hole of the compression piece is provided with a positioning protrusion that can be matched with the positioning groove.

10. The one-way sealing flow combination cover according to claim 1, characterized in that: The pressing assembly and the inner core are provided with air inlet holes which are interconnected.

11. The one-way sealed flow combination cover according to claim 10, characterized in that: An air intake assembly placement groove is provided at the front end of the air intake hole of the inner core; an air intake assembly is provided in the air intake assembly placement groove; the air intake assembly includes a film pressing ring, a filter membrane, and a one-way valve, the film pressing ring is located on the upper part of the filter membrane, and the one-way valve is located on the lower part of the filter membrane.

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