Pipeline connecting device for liquid chromatograph
By adding a connecting column and a tail end clamp in the pipeline connection device for liquid chromatograph, the problem of difficulty in removing the PEEK tough ring into the inlet end is solved, and effective fixation and stable connection of the PEEK tough ring is achieved.
Patent Information
- Application Number
- CN202421965225.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-08-14
AI Technical Summary
In the existing pipeline connection devices for liquid chromatographs, the PEEK tough ring is prone to fall into the entrance end of the liquid phase pipeline due to the lack of fixing measures, making it difficult to remove, affecting the practicality of the device.
A pipeline connection device for liquid chromatograph was designed. By adding a connecting column and a tail end clamp to the right side of the PEEK tough ring, the structure of the plug-in hole and the limit clamp slot makes the tail end clamp cannot be pulled out after being inserted into the limit clamp slot, thereby achieving the fixation of the PEEK tough ring.
It effectively prevents the PEEK tough ring from falling into the liquid phase pipeline, simplifying the disassembly and assembly process. Just turn the stainless steel fixing screws to simultaneously remove the PEEK tough ring, improving the stability of the connection.
Smart Images
Figure CN222798364U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of analyzers, in particular to a pipeline connecting device for a liquid chromatograph. Background Art
[0002] The pipe connection devices in liquid chromatography (HPLC) are key components used to ensure the smooth flow of liquid samples and solvents in the system. These connection devices must be able to withstand high pressure and chemical corrosion, and are usually required to have a certain sealing performance to prevent leakage. The types of pipe connection devices include but are not limited to joints, pipes, two-way, three-way and filters, etc., and liquid phase pipe connectors are specially designed for liquid chromatography systems and can be used for pipe connections of different sizes. They have corresponding threaded port configurations to adapt to different system requirements.
[0003] Common pipe joints for liquid chromatography include stainless steel ring and stainless steel screw split joints, PEEK ring and PEEK screw split joints, PEEK ring and screw integrated joints, and PEEK ring and stainless steel screw split joints. Except for the stainless steel ring and stainless steel screw which cannot be adjusted after being installed on the liquid phase stainless steel pipeline, the joints using PEEK rings can be adjusted on stainless steel pipelines or PEEK pipelines.
[0004] However, in this method, since there is no fixing measure, the PEEK tough ring may fall off from the liquid phase pipeline and remain at the inlet end of the liquid chromatography column. Once the PEEK tough ring falls into the inlet end, it is difficult to remove the PEEK tough ring due to the extremely narrow inlet end of the liquid phase pipeline, thereby making the liquid chromatography column unusable. This makes the practicality of the pipeline connecting device poor and cannot meet the working requirements of the pipeline connecting device. Therefore, a pipeline connecting device for a liquid chromatograph is proposed. Utility Model Content
[0005] 1. Technical issues to be solved
[0006] In view of the deficiencies in the prior art, the utility model provides a pipeline connection device for a liquid chromatograph to solve the technical problem that the PEEK tough ring is difficult to remove after it falls into the inlet end due to the lack of fixing measures.
[0007] (II) Technical solution
[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a pipeline connection device for a liquid chromatograph, comprising:
[0009] A PEEK tough ring and a stainless steel fixing screw, a connecting column is coaxially installed on the right side of the PEEK tough ring, and a tail end clamp is coaxially installed on the right end of the connecting column;
[0010] The plug-in hole is provided on the left side of the stainless steel fixing screw, the stainless steel fixing screw has a limit slot on the right side of the plug-in hole, the connecting column is inserted in the plug-in hole, and the tail end clamp is inserted in the limit slot;
[0011] The channel is opened in the middle position of the PEEK tough ring and the stainless steel fixing screw, and a nylon ring belt is clamped on the right side of the inner side of the limit slot.
[0012] Preferably, the right side of the tail end clamp is set to be single-sidedly inclined, and the left side diameter of the tail end clamp is larger than the connecting column, which facilitates limiting.
[0013] Preferably, the diameter of the plug-in hole is adapted to the connecting column, the diameter of the limiting slot is the same as the left diameter of the tail end clamp, and the right diameter of the tail end clamp is smaller than the plug-in hole, which facilitates the tail end clamp to be inserted into the interior of the plug-in hole through the right side and pressed into the interior of the limiting slot when squeezed.
[0014] Preferably, the right end nut of the stainless steel fixing screw is circular or hexagonal, which is convenient for tightening or loosening with a wrench.
[0015] (III) Beneficial effects
[0016] Compared with the prior art, the utility model provides a pipeline connection device for a liquid chromatograph, which has the following beneficial effects:
[0017] The pipeline connection device for liquid chromatograph, by adding a connection column and a tail end clamp on the right side of the PEEK tough ring, can be inserted into the interior of the plug-in hole and pressed during assembly, so that the tail end clamp can be inserted into the interior of the limit card slot. Since the tail end clamp is set with a single bevel, it cannot be pulled out after being inserted into the limit card slot, so that the PEEK tough ring can be prevented from falling off, and the PEEK tough ring can be driven to be synchronously disassembled by rotating the stainless steel fixing screw during disassembly and assembly, thereby preventing the PEEK tough ring from falling into the liquid phase pipeline. At the same time, the added nylon ring belt can squeeze the tail end clamp when it is inserted into the limit card slot, so that the tail end clamp can be limited, so that the tail end clamp is plugged more tightly and the stability of the connection is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the utility model;
[0019] Figure 2 This is a schematic diagram of the assembly structure of the PEEK tough ring and the stainless steel fixing screw of the utility model;
[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the stainless steel fixing screw of the utility model;
[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the assembly of the PEEK tough ring and the stainless steel fixing screw of the utility model.
[0022] In the figure: 1. PEEK tough ring; 2. Stainless steel fixing screw; 3. Connecting column; 4. Tail end clamp; 5. Plug hole; 6. Limiting slot; 7. Channel; 8. Nylon ring belt. DETAILED DESCRIPTION
[0023] 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 in 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.
[0024] The utility model provides a technical solution, a pipeline connection device for a liquid chromatograph, comprising a PEEK tough ring 1, a stainless steel fixing screw 2, a connecting column 3, a tail end clamp 4, a plug hole 5, a limit card slot 6, a channel 7 and a nylon ring belt 8:
[0025] See also Figure 1 and Figure 2 A connecting column 3 is coaxially mounted on the right side of the PEEK tough ring 1, and a tail end clamp 4 is coaxially mounted on the right end of the connecting column 3;
[0026] The plug hole 5 is opened on the left side of the inner part of the stainless steel fixing screw 2. Figure 3 and Figure 4 The inside of the stainless steel fixing screw 2 is provided with a limited card slot 6 at the position on the right side of the plug-in hole 5, the connecting column 3 is inserted into the plug-in hole 5, the tail end clamp 4 is inserted into the limited card slot 6, the right side of the tail end clamp 4 is a single-sided inclined setting, the left side diameter of the tail end clamp 4 is larger than the connecting column 3, the diameter of the plug-in hole 5 is adapted to the connecting column 3, the diameter of the limited card slot 6 is the same as the left side diameter of the tail end clamp 4, the right side diameter of the tail end clamp 4 is smaller than the plug-in hole 5, the right end nut of the stainless steel fixing screw 2 is a circular or hexagonal setting, through The connecting column 3 and the tail end clamp 4 are added on the right side of the PEEK tough ring 1, so that during assembly, the tail end clamp 4 can be inserted into the interior of the plug hole 5 and pressed, so that the tail end clamp 4 can be inserted into the interior of the limit card slot 6. Since the tail end clamp 4 is set with a single bevel, it cannot be pulled out after being inserted into the limit card slot 6, so that the PEEK tough ring 1 can be prevented from falling off, so that when disassembling, only the stainless steel fixing screw 2 needs to be turned to drive the synchronous disassembly of the PEEK tough ring 1, thereby preventing the PEEK tough ring 1 from falling into the liquid phase pipeline;
[0027] The channel 7 is opened in the middle position inside the PEEK tough ring 1 and the stainless steel fixing screw 2. A nylon ring band 8 is clamped on the right side of the inner limit slot 6. The added nylon ring band 8 can squeeze the tail end clamp 4 when it is inserted into the limit slot 6, so as to limit the tail end clamp 4, make the tail end clamp 4 more tightly inserted, and improve the stability of the connection.
[0028] The present solution adds a connecting column 3 and a tail end clamp 4 on the right side of the PEEK tough ring 1, so that during assembly, the tail end clamp 4 can be inserted into the interior of the plug-in hole 5 and pressed, so that the tail end clamp 4 can be inserted into the interior of the limiting slot 6. Since the tail end clamp 4 is set with a single bevel, it cannot be pulled out after being inserted into the limiting slot 6, so that the PEEK tough ring 1 can be prevented from falling off. During disassembly and assembly, only the stainless steel fixing screw 2 needs to be rotated to drive the synchronous disassembly of the PEEK tough ring 1, thereby preventing the PEEK tough ring 1 from falling into the liquid phase pipeline. At the same time, the added nylon ring belt 8 can squeeze the tail end clamp 4 when inserted into the limiting slot 6, so that the tail end clamp 4 can be limited, so that the tail end clamp 4 is plugged more tightly and the stability of the connection is improved.
[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A pipeline connection device for a liquid chromatograph, characterized in that: include: A PEEK tough ring (1) and a stainless steel fixing screw (2), wherein a connecting column (3) is coaxially mounted on the right side of the PEEK tough ring (1), and a tail end clamp (4) is coaxially mounted on the right end of the connecting column (3); The plug-in hole (5) is provided on the left side of the stainless steel fixing screw (2), a limit slot (6) is provided inside the stainless steel fixing screw (2) at a position on the right side of the plug-in hole (5), the connecting column (3) is inserted into the plug-in hole (5), and the tail end clamp (4) is inserted into the limit slot (6); The channel (7) is opened at the middle position inside the PEEK tough ring (1) and the stainless steel fixing screw (2), and a nylon ring belt (8) is clamped on the right side inside the limiting slot (6).
2. A pipeline connection device for a liquid chromatograph according to claim 1, characterized in that: The right side of the tail end clamp (4) is arranged to be single-sidedly inclined, and the left side of the tail end clamp (4) has a larger diameter than the connecting column (3).
3. A pipeline connection device for a liquid chromatograph according to claim 1, characterized in that: The diameter of the plug hole (5) is compatible with the connecting column (3), the diameter of the limit slot (6) is the same as the left diameter of the tail end clamp (4), and the right diameter of the tail end clamp (4) is smaller than the plug hole (5).
4. A pipeline connection device for a liquid chromatograph according to claim 1, characterized in that: The nut at the right end of the stainless steel fixing screw (2) is circular or hexagonal.