High-pressure-resistant stainless steel capillary line for HPLC (High Performance Liquid Chromatography) and hand twisting type connecting structure

Abstract

The utility model discloses a high-pressure-resistant stainless steel capillary line for HPLC and a hand screwing type connecting structure, the high-pressure-resistant stainless steel capillary line comprises two sets of pipe sleeves and a hollow pipe, the pipe sleeves are symmetrically installed, the hollow pipe is arranged between the two sets of pipe sleeves, and a butt joint pipe is arranged in the hollow pipe. According to the utility model, the convenient hand-screwing type butt joint of the high-pressure-resistant stainless steel capillary line is realized, the connection and the sealing of the pipeline can be realized through rotation, no special tool is needed, the installation and the disassembly of the pipeline become simple and rapid due to the design of the hand-screwing type joint, and the working efficiency is improved; in an HPLC (High Performance Liquid Chromatography) system, the hand-twisting type high-pressure-resistant stainless steel capillary line can be used for connecting components such as a chromatographic column, a detector and a pump, separation and detection of samples are realized, and due to the characteristics of excellent high-pressure resistance and easiness in installation, the capillary line can be used for connecting the components such as the chromatographic column, the detector and the pump. The pipeline is particularly suitable for an HPLC (High Performance Liquid Chromatography) system, such as a UPLC (Ultra Performance Liquid Chromatography) system,

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure stainless steel capillary pipeline technical field, concretely is a kind of HPLC with high pressure stainless steel capillary pipeline and hand screw type connecting structure. BACKGROUND

[0002] High performance liquid chromatograph (HPLC) is the detection instrument commonly used in pharmaceutical factory laboratory and detection unit, is used for component analysis, content, related substance analysis, auxiliary production and product release quality control, and stainless steel connecting capillary is the accessory and consumable commonly used by HPLC, generally low pressure uses PEEK tube to replace use, and the pressure of PEEK tube is usually determined by the specification of pipe material and the recommendation of manufacturer, generally speaking, the maximum working pressure range that PEEK tube can withstand is tens of megapascal (MPa) to hundreds of megapascal, for example, some common PEEK tube products can have maximum working pressure of 60MPa, 100MPa, and the pressure bearing is relatively limited, so stainless steel connecting capillary is suitable for high performance liquid chromatograph low pressure, high pressure detection pressure commonly used pipeline.

[0003] In HPLC system, the connection and sealing performance of pipeline are crucial to the stability and separation effect of system, and the traditional stainless steel pipeline joint often has poor adaptability, easy to leak or increase dead volume after installation, which affects the analysis accuracy and efficiency of HPLC system, therefore, it is an urgent need in the industry to develop an HPLC pipeline which is easy to install, high pressure resistant and good in adaptability. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of HPLC with high pressure stainless steel capillary pipeline and hand screw type connecting structure to solve the problem that high pressure stainless steel capillary pipeline is not convenient to hand screw type butt joint connection in the above background art, it is not convenient to realize the connection and sealing of pipeline by rotating, need to use special tool to realize connection, affect the stability of connection between structural parts and the convenience when operating.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of HPLC with high pressure stainless steel capillary pipeline and hand screw type connecting structure, including sleeve and hollow pipe, sleeve is two groups, and sleeve is symmetrically installed, and hollow pipe is provided between the two groups of sleeve, the inside of hollow pipe is provided with butt joint pipe, the inside of sleeve is all provided with pipeline body, and the both ends of pipeline body extend to the outside of sleeve, and the one end of pipeline body extends to the inside of butt joint pipe, the one end of sleeve away from hollow pipe is all installed with annular ring, and annular ring is fixedly connected with sleeve, the inner wall of hollow pipe is all provided with internal thread groove, the outer wall of sleeve is all provided with external thread, and external thread is threadedly connected with internal thread groove.

[0006] Preferably, the two ends of the connecting pipe are provided with tapered platforms, the outer walls of the tapered platforms are provided with sealing layers, and the pipeline body is connected with the tapered platforms through the sealing layers.

[0007] Preferably, the bottom ends of the annular rings are provided with positioning seats, and the positioning seats are fixedly connected with the annular rings.

[0008] Preferably, the inside of the annular ring is provided with three groups of positioning blocks at equal intervals, and the positioning blocks are fixedly connected with the annular ring.

[0009] Preferably, the inside of the positioning block is provided with a threaded rod, and the two ends of the threaded rod extend to the outside of the positioning block.

[0010] Preferably, the end of the threaded rod away from the positioning block is provided with a retainer, and the surface of the threaded rod on one side of the positioning block is provided with a nut sleeve.

[0011] Preferably, the bottom end of the retainer is provided with a stop block, and the inside of the stop block is provided with a positioning rod.

[0012] Preferably, the two ends of the positioning rod extend to the outside of the retainer, and the retainer is connected with the stop block through the positioning rod.

[0013] Compared with the prior art, the high-pressure-resistant stainless steel capillary pipeline has the advantages that the high-pressure-resistant stainless steel capillary pipeline is convenient to connect through hand screwing, the pipeline can be connected and sealed by rotating, special tools are not needed, the pipeline is simple and fast to install and disassemble, the working efficiency is improved, the stability of the connection between the structural parts and the convenience during operation and use are improved, in the HPLC system, the hand-screwed high-pressure-resistant stainless steel capillary pipeline can be used to connect the chromatographic column, the detector and the pump and other components, the sample can be separated and detected, due to the excellent high-pressure resistance and easy installation, the pipeline is particularly suitable for the HPLC system, such as the UPLC system, which needs high-pressure separation and detection.

[0014] (1) When the two groups of pipeline bodies are butt jointed, the butt joint pipe is installed inside the hollow pipe, the pipeline bodies are respectively inserted into the inside of the pipe sleeve, the pipeline bodies are connected with the butt joint pipe through the conical table, the sealing layer plays a sealing role on the pipeline bodies and the conical table, the pipe sleeve is manually rotated, the outer thread and the inner thread groove are matched to fix the pipe sleeve and the hollow pipe, so that the two groups of pipeline bodies are conveniently hand screwed and butt jointed, the high-pressure-resistant stainless steel capillary pipeline of the HPLC equipment is conveniently butt jointed, the hand screwed butt joint connection of the high-pressure-resistant stainless steel capillary pipeline is realized, the pipeline connection and sealing can be realized by rotating, special tools are not needed, the hand screwed joint design makes the pipeline installation and dismounting simple and fast, and the working efficiency is improved, in the HPLC system, the hand screwed high-pressure-resistant stainless steel capillary pipeline can be used for connecting components such as a chromatographic column, a detector and a pump, sample separation and detection are realized, and due to the excellent high-pressure-resistant performance and easy installation characteristics, the pipeline is particularly suitable for HPLC systems, such as UPLC systems, which need high-pressure separation and detection;

[0015] (2) The threaded rod is manually rotated, the threaded rod is driven to move under the cooperation of the positioning block and the threads of the threaded rod, the threaded rod drives the brake blocks to move through the retainer, and the three brake blocks clamp and fix the pipeline bodies under the cooperation of the positioning rod, so that the pipe sleeve and the pipeline bodies are fixed, stable connection between various structural members of the hand screwed connection structure is realized, and the stability of connection between the structural members and the convenience during operation and use are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0017] Figure 2 It is a front view structure schematic view of the utility model;

[0018] Figure 3 It is a front view structure schematic view of the utility model;

[0019] Figure 4 It is a side view structure schematic view of the utility model;

[0020] Figure 5 It is a three-dimensional structure schematic view of the annular ring of the utility model;

[0021] Figure 6 It is a three-dimensional structure schematic view of the pipeline body of the utility model;

[0022] Figure 7 It is a front view structure schematic view of the butt joint pipe of the utility model;

[0023] Figure 8 It is a three-dimensional structure schematic view of the pipe sleeve of the utility model;

[0024] Figure 9 The outer thread three-dimensional structure schematic diagram of the utility model.

[0025] In the figure: 1, pipe sleeve; 2, external thread; 3, pipeline body; 4, internal thread groove; 5, hollow pipe; 6, butt joint pipe; 7, conical table; 8, sealing layer; 9, annular ring; 10, brake block; 11, positioning rod; 12, retainer; 13, positioning block; 14, threaded rod; 15, nut sleeve; 16, positioning seat. DETAILED DESCRIPTION

[0026] In order to further illustrate the technical means and effects taken by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0027] Please refer to Figures 1-9 The utility model provides an embodiment: a kind of HPLC is used to high pressure stainless steel capillary line and hand screw type connecting structure, including pipe sleeve 1 and hollow pipe 5, pipe sleeve 1 is two groups, and pipe sleeve 1 is symmetrically installed, and hollow pipe 5 is provided between two groups of pipe sleeve 1, the inside of hollow pipe 5 is provided with butt joint pipe 6, the inside of pipe sleeve 1 is all provided with pipeline body 3, and the both ends of pipeline body 3 are extended to the outside of pipe sleeve 1, and the one end of pipeline body 3 is extended to the inside of butt joint pipe 6, pipeline body 3 is slidably connected with pipe sleeve 1, pipe sleeve 1 is all installed with annular ring 9 away from the one end of hollow pipe 5, and annular ring 9 is fixedly connected with pipe sleeve 1, the inner wall of hollow pipe 5 is all provided with internal thread groove 4, the outer wall of pipe sleeve 1 is all provided with external thread 2, and external thread 2 is threadedly connected with internal thread groove 4;

[0028] The both ends of butt joint pipe 6 are provided with conical table 7, the outer wall of conical table 7 is all installed with sealing layer 8, and pipeline body 3 is connected with conical table 7 by sealing layer 8, the bottom end of annular ring 9 is all installed with positioning seat 16, and positioning seat 16 is fixedly connected with annular ring 9;

[0029] The pipeline body 3 is a high-pressure-resistant stainless steel capillary pipeline, the pipeline body 3 is made of 316L stainless steel material, is subjected to high-temperature cleaning treatment, has excellent corrosion resistance and high-pressure resistance, when the two groups of pipeline bodies 3 are butted, the butt joint pipe 6 is installed in the inside of the hollow pipe 5, the pipeline body 3 is inserted into the inside of the pipe sleeve 1 respectively, the pipeline body 3 is connected with the butt joint pipe 6 through the conical table 7, the sealing layer 8 plays a sealing role on the pipeline body 3 and the conical table 7, the pipe sleeve 1 is manually rotated, the pipe sleeve 1 and the hollow pipe 5 are fixed through the cooperation of the external thread 2 and the internal thread groove 4, the two groups of pipeline bodies 3 are conveniently hand-twistedly butted and connected, the high-pressure-resistant stainless steel capillary pipeline of the HPLC equipment is conveniently butted, the hand-twisted butt joint connection of the high-pressure-resistant stainless steel capillary pipeline is realized, the connection and sealing of the pipeline can be realized through rotation, without using special tools, the hand-twisted joint design makes the installation and dismounting of the pipeline simple and fast, the working efficiency is improved, in the HPLC system, the hand-twisted high-pressure-resistant stainless steel capillary pipeline can be used for connecting components such as a chromatographic column, a detector and a pump, the separation and detection of a sample are realized, due to the excellent high-pressure resistance and easy installation characteristics, the pipeline is particularly suitable for HPLC systems such as UPLC systems that need high-pressure separation and detection;

[0030] The inside of the annular ring 9 is provided with three groups of positioning blocks 13 at equal intervals, the positioning blocks 13 are fixedly connected with the annular ring 9, the inside of each positioning block 13 is provided with a threaded rod 14, and both ends of the threaded rod 14 extend to the outside of the positioning block 13, and the threaded rod 14 is threadedly connected with the positioning block 13;

[0031] The end of the threaded rod 14 away from the positioning block 13 is provided with a retainer 12, the surface of the threaded rod 14 on one side of the positioning block 13 is provided with a nut sleeve 15, and the bottom end of the retainer 12 is provided with a brake block 10, and the inside of the brake block 10 is provided with a positioning rod 11;

[0032] Both ends of the positioning rod 11 extend to the outside of the retainer 12, and the retainer 12 is connected with the brake block 10 through the positioning rod 11;

[0033] The threaded rod 14 is manually rotated, the threaded rod 14 is driven to move under the cooperation of the positioning block 13 and the threads, the retainer 12 drives the brake block 10 to move under the cooperation of the threaded rod 14, three groups of brake blocks 10 clamp and fix the pipeline body 3 under the cooperation of the positioning rod 11, so as to conveniently fix the pipe sleeve 1 and the pipeline body 3, the nut sleeve 15 is sleeved on the surface of the threaded rod 14, and the nut sleeve 15 plays a role of re-fixing the threaded rod 14 and the positioning block 13, and the positioning seat 16 facilitates the connection of the annular ring 9 with the outside, the stable connection between the various structural members of the hand-twisted connection structure is realized, and the stability of the connection between the structural members and the convenience during operation and use are improved.

[0034] The embodiment of the application is used as follows: firstly, when the two pipeline bodies 3 are connected, the connecting pipe 6 is installed inside the hollow pipe 5, the pipeline bodies 3 are respectively inserted into the inside of the pipe sleeve 1, the pipeline bodies 3 are connected with the connecting pipe 6 through the conical table 7, the sealing layer 8 seals the pipeline bodies 3 and the conical table 7, the pipe sleeve 1 is manually rotated, the pipe sleeve 1 and the hollow pipe 5 are fixed through the cooperation of the outer thread 2 and the inner thread groove 4, the two pipeline bodies 3 are manually screwed and connected, the high-pressure-resistant stainless steel capillary pipeline of the HPLC equipment is conveniently connected, then the threaded rod 14 is manually rotated, the threaded rod 14 is driven to move through the cooperation of the positioning block 13 and the threaded rod 14, the threaded rod 14 drives the brake block 10 to move through the retainer 12, the three brake blocks 10 clamp and fix the pipeline bodies 3 through the cooperation of the positioning rod 11, the pipe sleeve 1 and the pipeline bodies 3 are conveniently fixed, the nut sleeve 15 is sleeved on the surface of the threaded rod 14, the nut sleeve 15 re-fixes the threaded rod 14 and the positioning block 13, the positioning seat 16 facilitates the connection of the annular ring 9 with the outside, and the use of the high-pressure-resistant stainless steel capillary pipeline is completed.

[0035] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make slight changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and equivalent embodiments with equivalent changes are obtained. Any indirect modification, equivalent change and modification of the above-mentioned embodiments, which do not depart from the technical solution of the present application, are still within the scope of the technical solution of the present application.

Claims

1. A high pressure resistant stainless steel capillary tube line for HPLC and a hand screw type connection structure, characterized by: The utility model provides a pipeline sleeve and hollow pipe, the pipeline sleeve (1) is two groups, and the pipeline sleeve (1) is symmetrically installed, and the hollow pipe (5) is arranged between two groups of pipeline sleeve (1), the inside of hollow pipe (5) is provided with butt joint pipe (6), the inside of pipeline sleeve (1) is provided with pipeline body (3), and both ends of pipeline body (3) extend to the outside of pipeline sleeve (1), and one end of pipeline body (3) extends to the inside of butt joint pipe (6), one end of pipeline sleeve (1) away from hollow pipe (5) is installed with annular ring (9), and annular ring (9) is fixedly connected with pipeline sleeve (1), the inner wall of hollow pipe (5) is provided with internal thread groove (4), and the outer wall of pipeline sleeve (1) is provided with external thread (2), and external thread (2) is threadedly connected with internal thread groove (4).

2. The high-pressure-resistant stainless steel capillary tube line for HPLC and hand-screw type connection structure according to claim 1, characterized in that: Both ends of butt joint pipe (6) are provided with taper platform (7), the outer wall of taper platform (7) is installed with sealing layer (8), and pipeline body (3) is connected with taper platform (7) through sealing layer (8).

3. The high-pressure resistant stainless steel capillary tube line for HPLC and hand screw type connection structure according to claim 1, characterized in that: The bottom end of annular ring (9) is installed with locating seat (16), and locating seat (16) is fixedly connected with annular ring (9).

4. The high-pressure resistant stainless steel capillary tube line for HPLC and hand screw type connection structure according to claim 1, characterized in that: The inside of annular ring (9) is installed with three groups of equidistance locating block (13), and locating block (13) is fixedly connected with annular ring (9).

5. The high-pressure resistant stainless steel capillary tube line for HPLC and hand screw type connection structure according to claim 4, characterized in that: The inside of locating block (13) is provided with threaded rod (14), and both ends of threaded rod (14) extend to the outside of locating block (13).

6. The high-pressure resistant stainless steel capillary tube line for HPLC and the hand-screw type connection structure according to claim 5, characterized in that: The end of threaded rod (14) away from locating block (13) is installed with retainer (12), and the surface of threaded rod (14) on one side of locating block (13) is sleeved with nut sleeve (15).

7. The high-pressure resistant stainless steel capillary tube line for HPLC and hand screw type connection structure according to claim 6, characterized in that: The bottom end of retainer (12) is provided with brake block (10), and the inside of brake block (10) is provided with locating rod (11).

8. The high-pressure resistant stainless steel capillary tube line for HPLC and the hand-screw type connection structure according to claim 7, characterized in that: Both ends of locating rod (11) extend to the outside of retainer (12), and retainer (12) is connected with brake block (10) through locating rod (11).

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