CN203232010U - Pressure buffering device of liquid chromatograph - Google Patents
Pressure buffering device of liquid chromatograph Download PDFInfo
- Publication number
- CN203232010U CN203232010U CN 201320287292 CN201320287292U CN203232010U CN 203232010 U CN203232010 U CN 203232010U CN 201320287292 CN201320287292 CN 201320287292 CN 201320287292 U CN201320287292 U CN 201320287292U CN 203232010 U CN203232010 U CN 203232010U
- Authority
- CN
- China
- Prior art keywords
- boss
- gland
- groove
- pressure
- dashpot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The utility model discloses a pressure buffering device of a liquid chromatograph. The pressure buffering device comprises a base and a gland which is connected to the base, wherein a boss is arranged on the upper end surface of the base, a groove is arranged in the center of the boss, a rubber damping block is filled inside the groove, an isolation film is adhered onto the upper surface of the boss, a buffering groove is arranged in the lower end surface of the gland, the diameter of the buffering groove is matched with that of the boss, and the depth of the buffering groove is greater than the height of the boss; the gland is also provided with a mobile phase inlet, a mobile phase outlet and a connecting hole, which are respectively communicated with the buffering groove, and a pressure sensor probe is connected into the connecting hole. The pressure buffering device is small in size, high in reliability and free from polluting a system flow path; the pulse of a high-pressure constant-current pump can be effectively eliminated, the baseline noise of a detector is increased, and the detection sensitivity and accuracy can be improved; a pressure transmitter is installed on the gland, so that the fluctuation of the system pressure can be monitored by operators in real time through a control system.
Description
Technical field
The utility model relates to the pulsation dampener field, is specifically related to a kind of pulsation dampener for liquid chromatograph.
Background technology
In the liquid-phase chromatographic analysis process, what require that the pulsation of pump should try one's best is little, and especially in the gradient analysis experiment, pulsation is fatal to the influence of sample separation effect.
At present, employed high pressure constant flow pump mainly contains two kinds in liquid-phase chromatographic analysis, and a kind of is single pump head high pressure constant flow pump, and a kind of is that the double pump head height is pressed constant flow pump; Single pump head high pressure constant flow pump is provided with a cam and drives, and can realize the constant of flow in the process of F.F., but in the imbibition process, is the fluctuation that can't avoid flow, has just determined its instability of flow on the principle; The double pump head height presses constant flow pump to adopt the double cam Compensation Design, and namely two cams anti-phase 180 are spent, during pump head 1 imbibition, and pump head 2 pump liquid, during pump head 2 imbibitions, pump head 1 pump liquid; In theory, if ignore the return time of retaining valve, the double pump head height presses constant flow pump can realize constant current.But in actual design and production run, the return time of retaining valve affects the stable of high voltage and constant current pump discharge to a great extent.In order to improve the stability of pressing the constant flow pump flow, the method of revising cam curve that adopts is arranged, the method that adopts electronic compensation is arranged, the method that adopts the setting pressure impact damper is also arranged, wherein revise cam curve and electronic compensation method and implement difficulty, and can only eliminate pulsation to a certain extent, and mostly the pulsation dampener of existing liquid chromatograph is that being used as filling material with dimethyl silicon oil realizes buffering, the sort buffer device is often bulky, be difficult to assembling, in case and dimethyl silicon oil leaks meeting severe contamination liquid chromatograph flow path system.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of liquid chromatograph pulsation dampener, the pulsation dampener that can solve existing liquid chromatograph adopts dimethyl silicon oil as filling material, cause damper volume huge, and dimethyl silicon oil leak the problem of meeting severe contamination liquid chromatograph flow path system.
The utility model is achieved through the following technical solutions:
A kind of liquid chromatograph pulsation dampener, comprise base and and be connected in the gland of base, the upper surface of described base is provided with boss, described boss center is provided with groove, be filled with the rubber damping piece in the described groove, described boss upper surface is pasted with isolated film, and the lower surface of described gland is provided with dashpot, the diameter of described dashpot and boss is complementary, and the degree of depth of described dashpot is greater than the height of boss; Also be provided with the mobile phase entrance that is communicated with dashpot respectively, flow outlet and connecting hole mutually on the described gland, be connected with the pressure transducer probe in the described connecting hole.
The further improvement of the utility model scheme is that the groove bottom side portion of dashpot is provided with O-ring seal.
The further improvement of the utility model scheme is, gland is provided with A hole and the B hole that is communicated with dashpot, and cutting ferrule is fixedly arranged respectively in described A hole and the B hole, and outlet is connected in cutting ferrule by hollow bolt respectively to described mobile phase entrance with flowing mutually.
The further improvement of the utility model scheme is that pressure transducer pops one's head in to be threadedly connected to connecting hole, is provided with sealing gasket between described pressure transducer probe and the gland.
The utility model advantage compared with prior art is:
One, volume is little, and is simple in structure, easy to assembly, the reliability height, and can not pollute system's stream;
Two, eliminate the pulsation of high pressure constant flow pump effectively, improved the baseline noise of detecting device in the liquid-phase chromatographic analysis process, improved the sensitivity and the accuracy that detect;
Three, setting pressure transmitter on gland, operating personnel can be by the fluctuation of control system real-time monitoring system pressure.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of base.
Fig. 3 is the structural representation of gland.
Embodiment
As Fig. 1, Fig. 2 and a kind of liquid chromatograph pulsation dampener shown in Figure 3, comprise base 6 and and be connected in the gland 5 of base 6, the upper surface of described base 6 is provided with boss 12, described boss 12 centers are provided with groove 13, be filled with rubber damping piece 7 in the described groove 13, described boss 12 upper surfaces are pasted with isolated film 8, the lower surface of described gland 5 is provided with dashpot 14, the diameter that the groove bottom side portion of described dashpot 14 is provided with O-ring seal 10 described dashpots 14 and boss 12 is complementary, and the degree of depth of described dashpot 14 is greater than the height of boss 12; Also be provided with the A hole 15, B hole 16 and the connecting hole 17 that are communicated with dashpot 14 respectively on the described gland 5, cutting ferrule 2 is fixedly arranged respectively in described A hole 15 and the B hole 16, phase entrance 3 and mobilely export 11 mutually and be connected in cutting ferrule 2 by hollow bolt 1 respectively flows; Pressure transducer probe 9 is provided with sealing gasket 4 to be threadedly connected to connecting hole 17 between described pressure transducer probe 9 and the gland 5.
Flowing enters cushion space between dashpot 14 and the boss 12 from the phase entrance 3 that flows, and exports 11 outflows mutually from flowing.When system pressure became big, rubber damping piece 7 was compressed, and isolated film 8 is out of shape thereupon, and the cushion space volume increases; When system pressure reduces, 7 bounce-backs of rubber damping piece, isolated film 8 is out of shape thereupon, and the cushion space volume reduces.In the high pressure constant flow pump operation process, cam rotation one-period, said process namely repeats once, thereby has eliminated the one and another pulsation of pump.
Claims (4)
1. liquid chromatograph pulsation dampener, it is characterized in that: comprise base (6) and and be connected in the gland (5) of base (6), the upper surface of described base (6) is provided with boss (12), described boss (12) center is provided with groove (13), be filled with rubber damping piece (7) in the described groove (13), described boss (12) upper surface is pasted with isolated film (8), the lower surface of described gland (5) is provided with dashpot (14), described dashpot (14) is complementary with the diameter of boss (12), and the degree of depth of described dashpot (14) is greater than the height of boss (12); Also be provided with the mobile phase entrance (3) that is communicated with dashpot (14) respectively, outlet (11) and the connecting hole (17) mutually that flow on the described gland (5), be connected with pressure transducer probe (9) in the described connecting hole (17).
2. a kind of liquid chromatograph pulsation dampener as claimed in claim 1, it is characterized in that: the groove bottom side portion of described dashpot (14) is provided with O-ring seal (10).
3. a kind of liquid chromatograph pulsation dampener as claimed in claim 1, it is characterized in that: described gland (5) is provided with A hole (15) and B hole (16) that are communicated with dashpot (14), in described A hole (15) and B hole (16) cutting ferrule (2) is arranged fixedly respectively, outlet (11) is connected in cutting ferrule (2) by hollow bolt (1) respectively to described mobile phase entrance (3) with flowing mutually.
4. a kind of liquid chromatograph pulsation dampener as claimed in claim 1 is characterized in that: described pressure transducer probe (9) is provided with sealing gasket (4) to be threadedly connected to connecting hole (17) between described pressure transducer probe (9) and the gland (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320287292 CN203232010U (en) | 2013-05-24 | 2013-05-24 | Pressure buffering device of liquid chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320287292 CN203232010U (en) | 2013-05-24 | 2013-05-24 | Pressure buffering device of liquid chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203232010U true CN203232010U (en) | 2013-10-09 |
Family
ID=49288130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320287292 Expired - Fee Related CN203232010U (en) | 2013-05-24 | 2013-05-24 | Pressure buffering device of liquid chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203232010U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931624A (en) * | 2015-07-16 | 2015-09-23 | 河北欧世盛科技有限公司 | Pressure sensor and liquid chromatograph |
-
2013
- 2013-05-24 CN CN 201320287292 patent/CN203232010U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931624A (en) * | 2015-07-16 | 2015-09-23 | 河北欧世盛科技有限公司 | Pressure sensor and liquid chromatograph |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102865271A (en) | Detection method and device of internal leakage of hydraulic valve | |
| CN109060270A (en) | It is a kind of can on-line checking slip and frictional force reciprocation sealing experimental provision | |
| CN104444484A (en) | Plate carrying device | |
| CN104122187B (en) | Sine pressure wave succusion ultralow permeability analyzer | |
| CN103645302A (en) | Experiment device and method for realizing CO2 reservoir oil displacement dynamic monitoring and inversion dynamic simulation | |
| CN106353080B (en) | A kind of sealing ring straight line dynamic sealing characteristic experimental apparatus and experimental method | |
| CN204302155U (en) | Dynamic load effect coal body permeability detector | |
| CN204627899U (en) | A kind of liquid chromatograph high pressure advection infusion pump | |
| CN203232010U (en) | Pressure buffering device of liquid chromatograph | |
| CN208721348U (en) | It is a kind of can on-line checking slip and frictional force reciprocation sealing experimental provision | |
| CN103291599B (en) | Electric automobile electronic water pump leakage pressure detection means and the detection method using the device | |
| CN206020014U (en) | A kind of sealing ring straight line dynamic sealing characteristic experimental apparatus | |
| CN104034396A (en) | Wide-range piston-type gas flow standard device | |
| CN107655809A (en) | A kind of coal containing methane gas seepage flow test device for considering Crack change | |
| CN104237427B (en) | A kind of liquid chromatogram mobile phase prior-warning device | |
| CN202083678U (en) | High-pressure constant-current pump ripple damper with full-peak contact surface | |
| CN202041344U (en) | High pressure sensor for ultra performance liquid chromatograph | |
| CN204065040U (en) | A kind of liquid chromatogram mobile phase prior-warning device | |
| CN102768009B (en) | A kind of device measuring the displacement of reciprocating-pump valve valve disc | |
| CN103323492B (en) | Rapid assembly micro-flow detection cell device with magnetic separation | |
| CN204141245U (en) | A kind of hand-held pressure gauge | |
| CN206141804U (en) | Volumetric pressure compensation device under water of adjustable compensation | |
| CN105136526A (en) | Wellhead coalbed methane sampling device | |
| CN205826195U (en) | A kind of novel ultrahigh pressure pressure transducer | |
| CN204903128U (en) | Fluidic element detection device for well drilling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20210524 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |