CN110761990A - Sealing mode of precise column injection pump - Google Patents
Sealing mode of precise column injection pump Download PDFInfo
- Publication number
- CN110761990A CN110761990A CN201911211298.XA CN201911211298A CN110761990A CN 110761990 A CN110761990 A CN 110761990A CN 201911211298 A CN201911211298 A CN 201911211298A CN 110761990 A CN110761990 A CN 110761990A
- Authority
- CN
- China
- Prior art keywords
- piston rod
- pump
- sleeve
- pump sleeve
- injection pump
- 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.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 20
- 239000007924 injection Substances 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a sealing mode of a contact surface of a pump sleeve and a piston rod of a precision cylindrical jet pump. The precise cylindrical jet pump comprises a pump sleeve, a piston rod and a pump body, wherein the pump sleeve and the piston rod are integrally formed; one end of the piston rod is inserted into the pump sleeve to form a variable cavity capable of accurately quantifying with the pump sleeve, and the other end of the piston rod is connected with the pump body; the end of the piston rod close to the variable cavity is cylindrical, and the cylindrical rear end is carved, so that only part of the outer surface of the piston rod can be in contact with the pump sleeve, the contact area of the piston rod and the pump sleeve is reduced, the phenomena of adhesion and blockage caused by too large contact surface of the piston rod and the pump sleeve can be effectively prevented, and the failure rate of the precision injection pump is reduced. The sealing mode of the invention can effectively solve the problems of adhesion and blockage of the precision injection pump when the solution is taken, and improves the practicability of the precision injection pump.
Description
Technical Field
The invention relates to a sealing mode between a piston rod and a pump sleeve of a precise cylindrical jet pump, in particular to a sealing mode of a precise cylindrical jet pump.
Background
The injection pump is used as a relatively precise liquid taking and feeding mode, and the injection pump is often subjected to the situation of pumping strong corrosive liquid, strong acid and strong alkalinity or high-temperature liquid in the using process, so that the injection pump has high requirements on the material of a pump body. In addition, in the using process, due to repeated pushing and pulling of the pump, the movable surface of the pump is easy to generate scratches and even liquid leakage, which greatly affects the precision and the service life of the injection pump, so the sealing mode of the movable surface of the injection pump is also a crucial factor affecting the quality of the injection pump.
Disclosure of Invention
The invention aims to provide a sealing mode of a precision plunger pump, which prevents the phenomenon of blocking in the using process.
In order to achieve the aim, the invention provides a sealing mode of a precision cylindrical injection pump, the precision cylindrical injection pump comprises a pump sleeve, a piston rod and a pump body, wherein the pump sleeve and the piston rod are integrally formed; one end of the piston rod is inserted into the pump sleeve to form a variable cavity capable of accurately quantifying with the pump sleeve, and the other end of the piston rod is connected with the pump body; the end of the piston rod close to the variable cavity is cylindrical, and the cylindrical rear end is carved, so that only part of the outer surface of the piston rod can be in contact with the pump sleeve, the contact area of the piston rod and the pump sleeve is reduced, the phenomena of adhesion and blockage caused by too large contact surface of the piston rod and the pump sleeve can be effectively prevented, and the failure rate of the precision injection pump is reduced.
Furthermore, the piston rod and the pump sleeve can be made of any hard material which can be integrally formed.
Furthermore, the contact surface of the piston rod and the pump sleeve is rigid seal.
Furthermore, concave structures are uniformly distributed on the surface of the piston rod subjected to engraving treatment, and the parts which are not concave are still in contact with the pump sleeve, so that the guiding effect or the sealing effect of the piston rod is increased.
Further, the piston rod may be of any configuration that reduces the area of the piston rod in contact with the pump housing.
Drawings
FIG. 1 is a schematic structural view of a precision jet pump according to the present invention;
FIG. 2 is a schematic view of the single thread configuration of the piston rod of FIG. 1;
FIG. 3 is a schematic view of the double thread configuration of the piston rod of FIG. 1;
fig. 4 is a schematic view of the annular configuration of the piston rod of fig. 1.
In the figure, 1-pump sleeve, 2-piston rod, 3-pump body, 4-cylinder, 5-concave structure and 6-guide surface.
Detailed Description
The sealing method of the precision cylindrical pump according to the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a sealing method of a precision cylindrical jet pump, the precision cylindrical jet pump comprises a pump sleeve 1, a piston rod 2 and a pump body 3, wherein the pump sleeve and the piston rod are integrally formed; one end of the piston rod is inserted into the pump sleeve to form a variable cavity capable of accurately quantifying with the pump sleeve, and the other end of the piston rod is connected with the pump body; one end of the piston rod, which is close to the variable cavity, is cylindrical 4, and the cylindrical rear end of the piston rod is subjected to engraving treatment, so that only part of the outer surface of the piston rod can be in contact with the pump sleeve, the contact area between the piston rod and the pump sleeve is reduced, the phenomena of adhesion and blockage caused by too large contact surface between the piston rod and the pump sleeve can be effectively prevented, and the fault rate of the precision injection pump is reduced.
As shown in fig. 2, 3 and 4, the piston rod has a single spiral structure, a double spiral structure and a circular ring structure, when a column pump is used for pumping a saline solution, if the column pump is placed for a long time after being used, crystals attached to the inner wall of a movable cavity of the piston pump easily cause the phenomenon that the piston pump is blocked when being restarted. When the double-spiral structure in fig. 2 or the circular ring structure in fig. 4 is used, the back end carving part of the piston rod has the functions of guiding and sealing while reducing the contact surface; when the single spiral structure in fig. 3 is selected for use, the engraved portion at the rear end of the piston rod has only a contact surface reducing and guiding function, and has no sealing effect, and a structure that enables the engraved portion to be selected according to process requirements is used.
Claims (5)
1. A sealing mode of a precise column injection pump comprises a pump sleeve, a piston rod and a pump body, wherein the pump sleeve and the piston rod are integrally formed; one end of the piston rod is inserted into the pump sleeve to form a variable cavity capable of accurately quantifying with the pump sleeve, and the other end of the piston rod is connected with the pump body; the end of the piston rod close to the variable cavity is cylindrical, and the cylindrical rear end is carved, so that only part of the outer surface of the piston rod can be in contact with the pump sleeve, the contact area of the piston rod and the pump sleeve is reduced, the phenomena of adhesion and blockage caused by too large contact surface of the piston rod and the pump sleeve can be effectively prevented, and the failure rate of the precision injection pump is reduced.
2. The sealing method of the precise cylinder injection pump according to claim 1, characterized in that: the piston rod and the pump sleeve can be made of any hard material which can be integrally formed.
3. The sealing method of the precise cylinder injection pump according to claim 1, characterized in that: the contact surface of the piston rod and the pump sleeve is rigid seal.
4. The sealing method of the precise cylinder injection pump according to claim 1, characterized in that: the surface of the piston rod after engraving is uniformly distributed with concave structures, and the parts which are not concave are still contacted with the pump sleeve, so that the guiding effect or the sealing effect of the piston rod is increased.
5. A piston rod according to claim 2, characterized in that: the piston rod may be of any configuration that reduces the contact surface area between the piston rod and the pump housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911211298.XA CN110761990A (en) | 2019-12-02 | 2019-12-02 | Sealing mode of precise column injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911211298.XA CN110761990A (en) | 2019-12-02 | 2019-12-02 | Sealing mode of precise column injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110761990A true CN110761990A (en) | 2020-02-07 |
Family
ID=69340483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911211298.XA Pending CN110761990A (en) | 2019-12-02 | 2019-12-02 | Sealing mode of precise column injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110761990A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61167773A (en) * | 1985-01-21 | 1986-07-29 | Kawasaki Heavy Ind Ltd | Reciprocating machine piston |
| JP2007100646A (en) * | 2005-10-06 | 2007-04-19 | Mitsubishi Heavy Ind Ltd | Piston ring |
| JP2009133231A (en) * | 2007-11-29 | 2009-06-18 | Anest Iwata Corp | Oil-free type vacuum pump |
| US20120215200A1 (en) * | 2009-10-06 | 2012-08-23 | Flex Partners, Inc | Precision fluid delivery systems |
| CN202954960U (en) * | 2012-12-11 | 2013-05-29 | 上海恒耐陶瓷技术有限公司 | Liquid-sealed plunger pump |
| CN211715310U (en) * | 2019-12-02 | 2020-10-20 | 南京纳摩尔仪器有限公司 | Precise injection pump |
-
2019
- 2019-12-02 CN CN201911211298.XA patent/CN110761990A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61167773A (en) * | 1985-01-21 | 1986-07-29 | Kawasaki Heavy Ind Ltd | Reciprocating machine piston |
| JP2007100646A (en) * | 2005-10-06 | 2007-04-19 | Mitsubishi Heavy Ind Ltd | Piston ring |
| JP2009133231A (en) * | 2007-11-29 | 2009-06-18 | Anest Iwata Corp | Oil-free type vacuum pump |
| US20120215200A1 (en) * | 2009-10-06 | 2012-08-23 | Flex Partners, Inc | Precision fluid delivery systems |
| CN202954960U (en) * | 2012-12-11 | 2013-05-29 | 上海恒耐陶瓷技术有限公司 | Liquid-sealed plunger pump |
| CN211715310U (en) * | 2019-12-02 | 2020-10-20 | 南京纳摩尔仪器有限公司 | Precise injection pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200207 |