High pressure resistant ion chromatography degasser

Abstract

The utility model relates to a kind of ion chromatography degassing box of high pressure resistance, comprising: degassing box main body, the degassing box main body includes degassing box upper cover and degassing box lower cover, the degassing box lower cover is equipped with around pipe main body, one or more degassing pipes are equipped on the around pipe main body of the degassing box lower cover, the degassing pipe is made of fluorine-containing high molecular polymer material, the SDR (standard size ratio) value of the degassing pipe is between 5-10, the both ends of the degassing box are respectively equipped with fluid inlet joint and fluid outlet joint. The utility model is synergistically reinforced by fluorine-containing high molecular degassing pipe+optimized SDR design+unique layout design, solves the problem that the degassing structure under superhigh pressure system is not high pressure resistant, realizes system-level high pressure reliability.

Description

Technical Field

[0001] This utility model relates to the field of chromatographic analysis equipment technology, specifically to a high-pressure resistant ion chromatography degassing box. Background Technology

[0002] Existing online degassing devices for ion chromatography generally employ a gas-liquid separation device that uses a vacuum tube to generate negative pressure, thus removing gas from the solution in the ion chromatography flow path. However, due to limitations in the precision of the vacuum tube extraction, its sealing performance and pressure resistance are not high. Furthermore, the vacuum pump generates noise and vibration during long-term operation and requires maintenance.

[0003] For example, patent document CN204116291U discloses an online degassing device for an ion chromatograph, including a housing, a permeation tube disposed within the housing, and a vacuum pump. The vacuum pump is connected to the interior of the housing via a pipeline. An electric heater is installed on the housing, and an ion chromatograph flow path connector is also installed on the housing, connected to the permeation tube. Degassing is performed using the pressure difference between the inside and outside of the permeation tube. A thermistor RT is installed on the housing. This device heats the gas simultaneously during degassing, improving degassing efficiency and avoiding the secondary generation of gas bubbles due to temperature variations.

[0004] For example, patent document CN202149895U discloses an online multi-channel degassing device for ion chromatography, including a negative pressure pump connected to a sealed chamber, with output and input interfaces connected to both ends of a permeation tube within the chamber. The chamber contains at least two permeation tubes, each connected to its own output and input interfaces. This online degassing device with two or more channels utilizes only one chamber and one negative pressure pump, achieving miniaturization and integration of the online degassing device. This significantly reduces the overall size and price of dual-channel and multi-channel ion chromatographs.

[0005] Traditional ion chromatography degassing boxes are installed before the pump, and the overall pressure limit of the instrument is 35 MPa. Online degassing devices also only need to withstand a pressure of 35 MPa. However, the pressure limit of current ultra-high pressure ion chromatography is 70 MPa. Under the pressure limit of ultra-high pressure systems, the following drawbacks exist: 1. The degassing pipe expands radially under high pressure, causing the seal to fail; 2. The centralized joint layout causes localized stress concentration; 3. Bubble precipitation causes baseline drift in the detection process; 4. The degassing box is installed before the pump for degassing, and its pressure resistance is not high.

[0006] Existing technologies lack optimization schemes for degassing structures under ultra-high pressure systems. Summary of the Invention

[0007] The present invention aims to solve the above problems by providing a high-pressure resistant ion chromatography degassing box, which solves the problem that the degassing structure is not resistant to high pressure under ultra-high pressure systems.

[0008] A high-pressure resistant ion chromatography degassing box includes a degassing box body, which includes a degassing box upper cover and a degassing box lower cover. The degassing box lower cover is provided with a tube winding body. One or more degassing tubes are provided on the tube winding body of the degassing box lower cover. The degassing tubes are made of fluorine-containing polymer material. The SDR (standard dimension ratio) value of the degassing tubes is between 5 and 10. The two ends of the degassing box are respectively provided with a fluid inlet connector and a fluid outlet connector.

[0009] Furthermore, the main body of the winding tube is provided with a limiting groove that matches the outer diameter of the degassing tube.

[0010] Furthermore, the fluorinated polymer material is selected from at least one of the group consisting of amorphous fluoropolymers, polytetrafluoroethylene (PTFE), and perfluoroalkoxy resins (PFA).

[0011] Furthermore, the fluid inlet connector and the fluid outlet connector are threaded connectors.

[0012] Furthermore, the SDR value of the degassing tube is 6.4.

[0013] This utility model has the following advantages: 1. The degassing tube is made of fluorinated polymer, which, due to its unique molecular structure and the resulting excellent physicochemical properties, can withstand ultra-high pressure (70MPa).

[0014] 2. The SDR value is 6.4, which achieves the best balance under the characteristics of fluorinated polymer materials. The wall thickness is sufficient to disperse stress, while avoiding uneven heat treatment or residual internal stress caused by excessive thickness.

[0015] 3. The design of distributing joints on both sides further disperses stress concentration points, reducing bending moment by 50% compared to having all inlet and outlet joints on one side.

[0016] 4. The combination of fluorinated polymer degassing tube, optimized SDR design, and unique layout design forms a synergistic enhancement, ultimately achieving system-level high-pressure reliability.

[0017] 5. A gas-liquid separation device that does not require a vacuum pump and relies on the huge pressure difference between the inside and outside of the tube to separate the gas. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the high-pressure resistant ion chromatography degassing box of this utility model; Figure 2 This is an exploded view of the high-pressure resistant ion chromatography degassing box of this utility model; Figure 3 This is the curve showing the relationship between SDR value and burst pressure (the pressure resistance reaches 75MPa when SDR=6.4). in, Figure 2 1-Top cover of degassing box, 2-Fluid inlet connector, 3-Roller body, 4-Lower cover of degassing box, 5-Fluid outlet connector, 6-Degassing pipe Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They only indicate that the structure and operation are in a specific orientation and are constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Example

[0022] like Figure 1-3 As shown, this embodiment provides a high-pressure resistant ion chromatography degassing box, including a degassing box body. The degassing box body includes a degassing box upper cover 1 and a degassing box lower cover 4. The degassing box lower cover 4 is provided with a tube winding body 3. One or more degassing tubes 6 are provided on the tube winding body 3 of the degassing box lower cover 4. The degassing tubes 6 are made of fluorine-containing polymer material. The SDR (standard dimension ratio) value of the degassing tubes 6 is between 5 and 10. The two ends of the degassing box are respectively provided with a fluid inlet connector 2 and a fluid outlet connector 5.

[0023] Furthermore, the main body of the winding tube is provided with a limiting groove that matches the outer diameter of the degassing tube.

[0024] Furthermore, the fluorinated polymer material is selected from at least one of the group consisting of amorphous fluoropolymers, polytetrafluoroethylene (PTFE), and perfluoroalkoxy resins (PFA).

[0025] Furthermore, the fluid inlet connector 2 and the fluid outlet connector 5 are threaded connectors.

[0026] Furthermore, the SDR value of the degassing tube 6 is 6.4.

[0027] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A high-pressure resistant ion chromatography degassing box, comprising a degassing box body, characterized in that: The degassing box body includes a degassing box upper cover (1) and a degassing box lower cover (4); The lower cover (4) of the degassing box is provided with a winding tube body (3); One or more degassing tubes (6) are provided on the tube body (3) of the lower cover of the degassing box. The degassing tube (6) is made of a fluorinated polymer material; The SDR value of the degassing tube (6) is between 5 and 10; The degassing box is provided with a fluid inlet connector (2) and a fluid outlet connector (5) at both ends.

2. The high-pressure resistant ion chromatography degassing box according to claim 1, characterized in that, The winding tube body (3) is provided with a limiting groove that matches the outer diameter of the degassing tube (6).

3. The high-pressure resistant ion chromatography degassing box according to claim 1, characterized in that, The fluid inlet connector (2) and fluid outlet connector (5) are threaded connectors.

4. The high-pressure resistant ion chromatography degassing box according to claim 1, characterized in that: The SDR value of the degassing tube (6) is 6.4.

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