CN202001243U - High-pressure constant flow pump of liquid chromatograph - Google Patents
High-pressure constant flow pump of liquid chromatograph Download PDFInfo
- Publication number
- CN202001243U CN202001243U CN2011200702152U CN201120070215U CN202001243U CN 202001243 U CN202001243 U CN 202001243U CN 2011200702152 U CN2011200702152 U CN 2011200702152U CN 201120070215 U CN201120070215 U CN 201120070215U CN 202001243 U CN202001243 U CN 202001243U
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- CN
- China
- Prior art keywords
- plunger
- seal
- pump head
- seat
- mat
- 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 - Lifetime
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Abstract
The utility model discloses a high-pressure constant flow pump of a liquid chromatograph, which comprises a pump head component, a box, a motor and a cam driven to rotate by the motor. The pump head component comprises a pump head, a pump head seat, a plunger portion, a compression spring and a plunger sealing part, wherein the plunger portion includes a sliding sleeve, a plunger seat and a plunger. The sliding sleeve is provided with a blind hole for containing the plunger seat with degree of freedom; one end of the plunger seat is in a round ball shape; the other end of the plunger seat is provided with a blind hole adapting to the plunger; and the plunger extends into the blind hole of the plunger seat and is connected integrally with the plunger seat. By the aid of the mode, the plunger of the plunger portion of the pump head component is in a floating structure, the effect of component force generated in movement of the plunger portion on the plunger sealing part is decreased, the service life of the plunger sealing part is prolonged, and maintenance cost is reduced.
Description
Technical field
The utility model relates to liquid chromatograph, relates in particular to a kind of high pressure constant flow pump of liquid chromatograph.
Background technique
The high pressure constant flow pump of liquid chromatograph is one of most important parts in the liquid chromatograph, the high pressure constant flow pump of existing liquid chromatograph comprises the pump head assembly, casing, motor, the cam of circuit control device and driven by motor rotation, the pump head assembly comprises pump head, the pump head seat, plunger portion, pressure spring and plunger seal, the pump head seat has cavity, plunger portion can be along the axis to-and-fro motion in cavity, one end of plunger portion is installed the roller that contacts with cam, the other end of plunger portion has affixed plunger, plunger seal is an overall structure, plunger passes plunger seal, roller contacts with the cam of high pressure constant flow pump, the component that is produced when cam rotation promotion plunger portion is reciprocating during work can make plunger form small swinging up and down, thereby plunger seal is impacted, shorten the working life of plunger seal, need frequent maintain and replace, maintenance cost is higher.
The model utility content
Technical problem to be solved in the utility model is: a kind of high pressure constant flow pump of liquid chromatograph is provided, and the high pressure constant flow pump of this kind liquid chromatograph can prolong the working life of plunger seal, reduces maintenance cost.
Solve this technical problem, the technical solution of the utility model is: a kind of high pressure constant flow pump of liquid chromatograph, comprise the pump head assembly, casing, the cam of motor and driven by motor rotation, the pump head assembly comprises pump head, the pump head seat, plunger portion, pressure spring and plunger seal, described plunger portion comprises sliding sleeve, plunger mat and plunger, described sliding sleeve has and holds the blind hole that plunger mat and plunger mat have degrees of freedom, described plunger mat one end is a spherical shape, the plunger mat the other end has the blind hole that adapts with plunger, described plunger put in the blind hole of plunger mat and and plunger mat be connected as a single entity.
Described plunger seal is made up of sealing seat, seal ring and diaphragm seal, described diaphragm seal is a loop configuration, the profile of described seal ring is a step-like structure, seal ring has the through hole that adapts with plunger, the profile of described sealing seat is a cylindrical body, the seal ring mounting hole that axially has the plunger matching hole and communicate of sealing seat with the plunger matching hole, described seal ring mounting hole and seal ring adapt, and the pressing end face of close plunger matching hole one side of sealing seat has the diaphragm seal installation room that adapts with diaphragm seal.
Described diaphragm seal has the lip of the pressing end face that stretches out sealing seat.
The high pressure constant flow pump of the utility model liquid chromatograph is adopted in such a way, the plunger of the plunger portion of pump head assembly is a floating structure, the component that is produced when reducing the plunger portion motion has prolonged the working life of plunger seal to the influence of plunger seal, has reduced maintenance cost.
Description of drawings
Below in conjunction with accompanying drawing the high pressure constant flow pump of the utility model liquid chromatograph is done explanation in further detail;
Fig. 1 is the pump head modular construction schematic representation of the high pressure constant flow pump of the utility model liquid chromatograph;
Fig. 2 is the structural representation of plunger portion shown in Figure 1;
Fig. 3 is the structure for amplifying schematic representation of Sealing shown in Figure 1;
Fig. 4 is a sealing seat structural representation shown in Figure 3;
In Fig. 1, Fig. 2, Fig. 3, Fig. 4,1, pressure spring; 2, sliding sleeve; 3, pump head seat; 4, plunger mat; 5, plunger; 6, pump head; 7, plunger seal; 8, adjust pad; 9, sealing seat; 10, seal ring; 11, diaphragm seal; 12, diaphragm seal installation room; 13, seal ring mounting hole; 14, pressing end face; 15, plunger matching hole.
Embodiment
As Fig. 1, Fig. 2 Fig. 3, shown in Figure 4, the high pressure constant flow pump of liquid chromatograph comprises the pump head assembly, casing, the cam of motor and driven by motor rotation, the pump head assembly comprises pump head 6, pump head seat 3, plunger portion, pressure spring 1 and plunger seal 7, plunger portion comprises sliding sleeve 2, plunger mat 4 and plunger 5, sliding sleeve 2 one ends can be installed roller, roller contacts with cam, sliding sleeve 2 has and holds the blind hole that plunger mat 4 and plunger mat 4 have degrees of freedom, plunger mat 4 one ends are spherical shape, plunger mat 4 the other ends have the blind hole that adapts with plunger 5, plunger 5 put in the blind hole of plunger mat 4 and and plunger mat 4 be connected as a single entity.One end of plunger mat 4 spherical shape is provided with the step that contacts with pressure spring 1, and pressure spring 1 places in the blind hole of sliding sleeve 2.Plunger seal is installed adopts adjustment pad 8.
Plunger seal is by sealing seat 9, seal ring 10 and diaphragm seal 11 are formed, diaphragm seal 11 is a loop configuration, the profile of seal ring 10 is a step-like structure, seal ring 10 has the through hole that adapts with plunger 5, the profile of sealing seat 9 is a cylindrical body, the seal ring mounting hole 13 that axially has plunger matching hole 15 and communicate of sealing seat 9 with plunger matching hole 15, seal ring mounting hole 13 adapts with seal ring 10, the pressing end face 14 of close plunger matching hole 15 1 sides of sealing seat 9 has the diaphragm seal installation room 12 that adapts with diaphragm seal 11, for the machining accuracy of the pressing end face that reduces sealing seat, diaphragm seal 11 can be made the structure of lip with the pressing end face 14 that stretches out sealing seat.
The high pressure constant flow pump of the utility model liquid chromatograph is adopted in such a way, and the plunger of the plunger portion of pump head assembly is a floating structure, and the component that is produced when reducing the plunger portion motion has prolonged the working life of plunger seal to the influence of plunger seal.Plunger seal adopts the individual components with rigidity, the phenomenon of having avoided the plunger seal tensioner of original structure in the pump head chamber, to be difficult to unload, and it is convenient to change, and has reduced maintenance cost.
Claims (3)
1. the high pressure constant flow pump of a liquid chromatograph, comprise the pump head assembly, casing, the cam of motor and driven by motor rotation, the pump head assembly comprises pump head (6), pump head seat (3), plunger portion, pressure spring (1) and plunger seal (7), it is characterized in that: described plunger portion comprises sliding sleeve (2), plunger mat (4) and plunger (5), described sliding sleeve (2) has and holds the blind hole that plunger mat (4) and plunger mat (4) have degrees of freedom, described plunger mat (4) one ends are spherical shape, plunger mat (4) the other end has the blind hole that adapts with plunger (5), described plunger (5) put in the blind hole of plunger mat (4) and and plunger mat (4) be connected as a single entity.
2. the high pressure constant flow pump of liquid chromatograph according to claim 1, it is characterized in that: described plunger seal is by sealing seat (9), seal ring (10) and diaphragm seal (11) are formed, described diaphragm seal (11) is a loop configuration, the profile of described seal ring (10) is a step-like structure, seal ring (10) has the through hole that adapts with plunger (5), the profile of described sealing seat (9) is a cylindrical body, the seal ring mounting hole (13) that axially has plunger matching hole (15) and communicate of sealing seat (9) with plunger matching hole (15), described seal ring mounting hole (13) adapts with seal ring (10), and the pressing end face (14) of close plunger matching hole (15) one sides of sealing seat (9) has the diaphragm seal installation room (12) that adapts with diaphragm seal (11).
3. the high pressure constant flow pump of liquid chromatograph according to claim 2, it is characterized in that: described diaphragm seal (11) has the lip of the pressing end face (14) that stretches out sealing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200702152U CN202001243U (en) | 2011-03-17 | 2011-03-17 | High-pressure constant flow pump of liquid chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200702152U CN202001243U (en) | 2011-03-17 | 2011-03-17 | High-pressure constant flow pump of liquid chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202001243U true CN202001243U (en) | 2011-10-05 |
Family
ID=44703986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200702152U Expired - Lifetime CN202001243U (en) | 2011-03-17 | 2011-03-17 | High-pressure constant flow pump of liquid chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202001243U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155378A (en) * | 2011-03-17 | 2011-08-17 | 芜湖天乐分析仪器有限公司 | High-pressure constant current pump of liquid chromatograph |
| CN105223298A (en) * | 2014-06-20 | 2016-01-06 | 北京普源精电科技有限公司 | A kind of liquid chromatograph with piston structure |
-
2011
- 2011-03-17 CN CN2011200702152U patent/CN202001243U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155378A (en) * | 2011-03-17 | 2011-08-17 | 芜湖天乐分析仪器有限公司 | High-pressure constant current pump of liquid chromatograph |
| CN102155378B (en) * | 2011-03-17 | 2012-12-05 | 芜湖天乐分析仪器有限公司 | High-pressure constant current pump of liquid chromatograph |
| CN105223298A (en) * | 2014-06-20 | 2016-01-06 | 北京普源精电科技有限公司 | A kind of liquid chromatograph with piston structure |
| CN105223298B (en) * | 2014-06-20 | 2019-01-08 | 苏州普源精电科技有限公司 | A kind of liquid chromatograph with piston structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111005 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |