CN201886007U - Damper for liquid chromatographic instrument - Google Patents
Damper for liquid chromatographic instrument Download PDFInfo
- Publication number
- CN201886007U CN201886007U CN2010206435432U CN201020643543U CN201886007U CN 201886007 U CN201886007 U CN 201886007U CN 2010206435432 U CN2010206435432 U CN 2010206435432U CN 201020643543 U CN201020643543 U CN 201020643543U CN 201886007 U CN201886007 U CN 201886007U
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- damper
- cavity
- elastic materials
- liquid chromatograph
- cover
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Abstract
The utility model discloses a damper for a liquid chromatographic instrument, which comprises a damper cavity, an elastic material body, a sealing ring, a damper cover and a damper nut; and the damper cavity, the sealing ring, the damper cover and the damper nut form a closed empty cavity, at least one through hole is arranged on the damper cavity and the damper cover at two sides of the empty cavity respectively, the elastic material body that is matched with the inner wall of the damper cavity and can damp various flowing phases is arranged in the empty cavity, grooves from the centers to the peripheries of the end surfaces are arranged on the two ends surfaces of the elastic material body, and a clearance for ensuring flowing of the flowing phases is arranged between the elastic material body and inner wall of the damper cavity. The damper has simple structure and a mixing effect, is short in time for cleaning the system and replacing the flowing phase, has better damping effect within wider pressure pulse range, and can still work normally under high pressure of 100MPa.
Description
Technical field
The utility model relates to a kind of damper, particularly a kind of liquid chromatograph damper.
Background technology
At present, the necessary component of common liquid chromatograph comprises: high pressure pump, injector, chromatographic column and detecting device etc., also can set up some other parts according to demand, as degasser, automatic sampler, column oven or the like.Wherein, the employed ripple damper of high pressure pump liquid-way system mainly contains following several version: becket damper, compressed fluid damper, resonant cavity damper, special efficacy spring-damper and barrier film damper etc.The damping principle of all these dampers all is to utilize the elastic performance of various different objects to reach the purpose that reduces hydrodynamic pressure pulsation in the liquid road, both when hydrodynamic pressure in the liquid road increases, elastomeric objects is compressed distortion, with hydrodynamic pressure in the form storage power reduction liquid road of potential energy; When hydrodynamic pressure in the liquid road reduced, elastomeric objects discharged the potential energy of storage, to increase hydrodynamic pressure in the liquid road.
Mainly there is following shortcoming in the damper of above-mentioned these versions:
1, existing damper volume ratio is bigger, and therefore, system's cleaning and replacing moving phase spended time are long.
2, existing damper does not have mixed effect, both when adopting double pump that moving phase is carried out geopressure gradient when mixing, and the mixer of must in the liquid road, connecting, thus increased liquid road volume, promptly postpone volume, the while has also prolonged the gradient response time.
3, existing damper tends to lose efficacy in extra high voltage system, even damages.
4, existing damper is when the system pressure scope is narrow, and damping is relatively good, surpasses the certain pressure scope, and damping can reduce, even can complete failure.
The utility model content
The purpose of this utility model is to overcome the shortcoming of prior art and a kind of liquid chromatograph damper is provided, this damper structure is simple, has mixed effect, system cleans and changes moving phase and takes a short time, in the pressure fluctuation scope of broad, all have good damping, but under the high pressure of 100Mpa operate as normal still.
For achieving the above object, the utility model adopts following technical proposals, and this damper comprises damper cavity, elastic materials, O-ring seal, damper cover and damper nut; Described damper cavity, O-ring seal, damper cover and damper nut constitute an airtight cavity body, can bear the pressure up to 100Mpa, and it is installed in the high pressure pump liquid-way system.Respectively be provided with at least one through hole on the damper cavity of these cavity body both sides and the damper cover, moving phase flows to from a side through hole, is flowed out by the opposite side through hole.Be provided with the elastic materials that can carry out damping that is complementary with described damper cavity internal chamber wall in the described cavity body to various moving phases, the both ends of the surface of this elastic materials are provided with from the groove of end face center to end circumferential edges, with the through hole that prevents to cause its obstruction damper cavity and damper cover to be provided with because of the resilient material body deformability in the liquid chromatograph course of work.Be provided with the gap that guarantees the moving phase circulation between described elastic materials and the damper cavity inner wall.
Further, the gap that is provided with between described elastic materials and the damper cavity inner wall is 0.02 millimeter-0.05 millimeter.
Further, described elastic materials is right cylinder, prism, spiral cylinder or stage shape cylinder.
Further, described O-ring seal adopts elastic sealing gasket, O-ring seals or rigid seal pad.
Further, described elastic materials is to be made by polytetrafluoroethylplastic plastic (PTFE), polyetheretherketone (PEEK), polyphenylene sulfide (PPS) or polyoxymethylene (POM).
Further, described damper cavity, damper cover and damper nut are that stainless steel material is made.
Principle of work of the present utility model is as follows: in the liquid chromatograph course of work, the moving phase with fluctuation pressure that high pressure pump pumps flows through damper, have of the through hole inflow of the highly pressurised liquid of pressure fluctuation from an end of damper, flow through gap between damper cavity and the elastic materials along the fluting of elastic materials one end, be summarised in again together at last, by the through hole outflow of the damper other end.If the geopressure gradient pump, then flow into be two kinds without the liquid that mixes fully, can effectively improve composite rate through after this process.
Because the fluid pressure that flows into is not steady, when pressure spike occurring, the elastic materials pressurized in the described cavity body, volume-diminished with this pressure spike of offsetting sudden change, is eased when making the moving phase pressure spike flow through damper; When pressure paddy occurring, the resilient material measure expansion in the described cavity body, it is big that volume becomes, and with the pressure paddy of this anaphragmic, is compensated when making moving phase pressure paddy flow through damper.This compression-expansion repeatedly by elastic materials in the described cavity body changes, and reaches the pulsation that suppresses moving phase pressure in the high pressure pump liquid-way system.
The utility model is compared with existing product, has following actively useful effect:
1, simple in structure, easy for installation, reliability is high.
2, having mixed effect, when walking the mixing of high pressure gradient with double pump, needn't can reduce the volume of delaying time in liquid Lu Zhongzai inline mixer, promptly is that damper also is a mixer.
3, liquid road volume before the post (and enter before the chromatographic column liquid volume) can be controlled in very lowly, and system cleans and changes the moving phase time and shortens.
4, in the moving phase pressure fluctuation scope of broad, all has good damping.
5, but operate as normal still under the high pressure of 100Mpa can destroyedly can not lose efficacy yet.
Description of drawings
Fig. 1 is a decomposition texture synoptic diagram of the present utility model.
Fig. 2 is a cut-open view of the present utility model.
Fig. 3 is the structural representation of the utility model elastic materials.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model.
Referring to Fig. 1-shown in Figure 3, a kind of liquid chromatograph comprises damper cavity 1, elastic materials 2, O-ring seal 3, damper cover 4 and damper nut 5 with damper.Described damper cavity 1 is a cylindrical body, and its bottom is provided with a through hole 11, and its upper surface is provided with the annular recess 12 of putting O-ring seal 3, and its upper end outer wall is provided with the screw thread with described damper nut 5 couplings; Described damper cover 4 is seated on the upper surface of damper cavity 1, the position of set annular recess 12 is provided with the annular recess 41 of putting O-ring seal 3 equally on this damper cover 4 corresponding described damper cavitys 1 upper surface, and this damper cover 4 is provided with a through hole 42; Described O-ring seal 3 adopts elastic sealing gasket.
Described damper nut 5 bag pressures damper cover 4 and are screwed onto on the damper cavity 1, constituted an airtight cavity body by damper cavity 1, O-ring seal 3, damper cover 4 and damper nut 5 like this, damper cavity 1 in this cavity body, damper cover 4 and damper nut 5 are made for stainless steel material, can bear the pressure up to 100Mpa, it is installed in the liquid chromatograph high pressure pump liquid-way system.Described cavity body is built-in to be placed with described elastic materials 2, these elastic materials 2 both ends of the surface are provided with from the groove 21 of end face center to end circumferential edges, this groove 21 is in order to prevent stopping up the through hole 11 that is provided with on damper cavity 1 and the damper cover 4 because of the resilient material body deformability causes it in the liquid chromatograph course of work, 42, described elastic materials is is the right cylinder of being made by polytetrafluoroethylplastic plastic (PTFE), polytetrafluoroethylplastic plastic (PTFE) is because its compressive modulus of elasticity is moderate, and the elastic strain range of linearity of high-quality polytetrafluoroethylplastic plastic (PTFE) is very wide, also plastic yield can not take place under high pressure, this liquid chromatograph is that 100Mpa can be suitable for the design pressure of damper.
Be provided with the gap 6 that guarantees the moving phase circulation between described elastic materials 2 and damper cavity 1 inwall, described gap 6 is 0.02 millimeter-0.05 millimeter.Liquid communication is smooth and easy in this scope, can not hinder that fluid flows and produce opposite pressure, and its liquid road volume also can be controlled at about 50ul-100ul, is beneficial to and does express-analysis.
Installation method is: earlier elastic materials 2 is slipped in the damper cavity 1, O-ring seal 3 is pressed in the annular recess 12 of the storing O-ring seal 3 that damper cavity 1 upper surface is provided with, cover damper cover 4 again, and then put damper nut 5, the threaded engagement of screw thread on this damper nut 5 and damper cavity 1 upper end outer wall screws, and provides coupling mechanism force with damper nut 5.
The utility model is used for liquid chromatograph mesohigh infusion pump to chromatographic column liquid road, can effectively reduce pressure fluctuation, flow velocity and pressure are stably arranged when making moving phase enter chromatographic column, the detection repeatability of instrument and reliability are improved, thereby optimize the overall performance of instrument.
The utility model can suppress the pressure fluctuation of pipeline mesohigh or super high pressure fluid, plays pressure and flow are acted on stably, so any liquid Lu Zhongjun to the pressure fluctuation sensitivity can use.
In sum, embodiment described in the utility model only provides a kind of embodiment of the best, technology contents of the present utility model and technical characterstic disclose as above, yet the personage who is familiar with this technology still may be based on content that the utility model disclosed and done various replacement and the modifications that do not deviate from creation spirit of the present invention; Therefore, protection domain of the present utility model is not limited to the technology contents that embodiment discloses, so all equivalences of doing according to shape of the present utility model, structure and principle change, all is encompassed in the protection domain of the present utility model.
Claims (6)
1. liquid chromatograph damper, it is characterized in that: it comprises damper cavity, elastic materials, O-ring seal, damper cover and damper nut; Described damper cavity, O-ring seal, damper cover and damper nut constitute an airtight cavity body, respectively be provided with at least one through hole on the damper cavity of these cavity body both sides and the damper cover, be provided with the elastic materials that can carry out damping that is complementary with described damper cavity internal chamber wall in the described cavity body to various moving phases, the both ends of the surface of this elastic materials are provided with from the groove of end face center to end circumferential edges, are provided with the gap that guarantees the moving phase circulation between described elastic materials and the damper cavity inner wall.
2. a kind of liquid chromatograph damper according to claim 1 is characterized in that: the gap that is provided with between described elastic materials and the damper cavity inner wall is 0.02 millimeter-0.05 millimeter.
3. a kind of liquid chromatograph damper according to claim 2 is characterized in that: described elastic materials is right cylinder, prism, spiral cylinder or stage shape cylinder.
4. a kind of liquid chromatograph damper according to claim 2 is characterized in that: described O-ring seal adopts elastic sealing gasket, O-ring seals or rigid seal pad.
5. according to claim 3 or 4 described a kind of liquid chromatograph dampers, it is characterized in that: described elastic materials is to be made by polytetrafluoroethylplastic plastic, polyetheretherketone, polyphenylene sulfide or polyoxymethylene.
6. a kind of liquid chromatograph damper according to claim 5 is characterized in that: described damper cavity, damper cover and damper nut are that stainless steel material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206435432U CN201886007U (en) | 2010-11-30 | 2010-11-30 | Damper for liquid chromatographic instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206435432U CN201886007U (en) | 2010-11-30 | 2010-11-30 | Damper for liquid chromatographic instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201886007U true CN201886007U (en) | 2011-06-29 |
Family
ID=44183553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206435432U Expired - Lifetime CN201886007U (en) | 2010-11-30 | 2010-11-30 | Damper for liquid chromatographic instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201886007U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107923884A (en) * | 2015-08-25 | 2018-04-17 | 昭和电工株式会社 | Phase chromatography-use column and the liquid-chromatography apparatus for possessing the phase chromatography-use column |
-
2010
- 2010-11-30 CN CN2010206435432U patent/CN201886007U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107923884A (en) * | 2015-08-25 | 2018-04-17 | 昭和电工株式会社 | Phase chromatography-use column and the liquid-chromatography apparatus for possessing the phase chromatography-use column |
| CN107923884B (en) * | 2015-08-25 | 2020-10-16 | 昭和电工株式会社 | Column for liquid chromatography and liquid chromatography apparatus provided with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160518 Address after: 102206 Beijing City, Shahe Town, step on the river village, No. 156 Patentee after: Beijing RIGOL Science and Technology Co., Ltd. Address before: 102206 Beijing City, Shahe Town, step on the river village, No. 156 Patentee before: Beijing Rigol Technologies, Inc. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20180109 Address after: Kolding road high tech Zone of Suzhou City, Jiangsu Province, No. 8 215163 Patentee after: SUZHOU RIGOL PRECISION ELECTRIC TECHNOLOGIES CO., LTD. Address before: 102206 Beijing City, Shahe Town, step on the river village, No. 156 Patentee before: Beijing RIGOL Science and Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200402 Address after: 215000 Room 408, building 1, No. 8, Jinfeng Road, hi tech city, Suzhou City, Jiangsu Province Patentee after: Suzhou Litong Precision Measurement System Co., Ltd Address before: Kolding road high tech Zone of Suzhou City, Jiangsu Province, No. 8 215163 Patentee before: SUZHOU RIGOL PRECISION ELECTRIC TECHNOLOGIES Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |
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| CX01 | Expiry of patent term |