CN214636510U - Plunger rod for sampling liquid sample - Google Patents
Plunger rod for sampling liquid sample Download PDFInfo
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- CN214636510U CN214636510U CN202120289614.1U CN202120289614U CN214636510U CN 214636510 U CN214636510 U CN 214636510U CN 202120289614 U CN202120289614 U CN 202120289614U CN 214636510 U CN214636510 U CN 214636510U
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- plunger rod
- plunger
- head
- plunger head
- liquid
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Abstract
The utility model discloses a plunger rod that liquid sample was used, include the plunger rod, cross liquid pipeline, plunger head and O type circle, plunger head detachably connects the lower extreme of plunger rod, it sets up to cross the liquid pipeline the inside of plunger rod, the intercommunication is seted up to the lower terminal surface of plunger head cross the export of liquid pipeline, the lower extreme outer wall of plunger rod is equipped with the annular groove, the annular groove embeds into O type circle, the lower terminal surface diameter of plunger head is less than the diameter of plunger rod, the outer peripheral edges butt of plunger head O type circle. The plunger head of different materials of present case plunger rod demountable installation makes the plunger rod have the characteristics of other materials concurrently, improves the product compatibility, and simple structure, and is with low costs.
Description
Technical Field
The utility model relates to the technical field of experimental instruments, in particular to a plunger rod for sampling liquid samples.
Background
The solid phase extraction instrument of the prior art needs to use SPE columns when solid phase extraction is carried out, samples need to be assembled with plunger rods through the SPE columns, and the sealed column passing can be realized, as shown in figure 1, (wherein, 1 ' is the plunger rods, 2 ' is the fixing seats, 3 ' is the second sealing gaskets, 4 ' is the stainless steel joint, 5 ' is the liquid passing pipeline, 6 ' is the first sealing gaskets, 7 ' is the O-shaped ring, and 8 ' is the fixing heads), the prior plunger rods 1 ' are basically integrally formed, most of the prior plunger rods are made of Teflon materials, and the Teflon materials have certain elasticity, lubricity and compatibility.
Different applications need to use the plunger rod of different materials, for example when needing to use perfluor compound (PFC), can not use the special fluorine dragon material because the interior fluorine element of special fluorine dragon material can influence the sample extraction result, can only use such specific materials such as PEEK (resin), consequently need change whole plunger rod into the PEEK material. PEEK has the disadvantages of high hardness, poor lubricity, and poor compatibility as a plunger rod, and thus tends to cause problems such as O-ring breakage during application.
Therefore, the problem solving point of the present application does not only lie in the limitation of the material, but also lies in how to structurally block the communication between the sample and the plunger rod.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a plunger rod of liquid sample usefulness, the plunger head of the different materials of demountable installation makes the plunger rod have the characteristics of other materials concurrently, improves the product compatibility, and simple structure, and is with low costs.
To achieve the above object, the solution of the present invention is: the plunger rod for sampling the liquid samples comprises a plunger rod, a liquid passing pipeline, a plunger head and an O-shaped ring, wherein the plunger head is detachably connected to the lower end of the plunger rod, the liquid passing pipeline is arranged inside the plunger rod, an outlet communicated with the liquid passing pipeline is formed in the lower end surface of the plunger head, an annular groove is formed in the outer wall of the lower end of the plunger rod, the O-shaped ring is arranged in the annular groove, the diameter of the lower end surface of the plunger head is smaller than that of the plunger rod, and the outer periphery of the plunger head is abutted to the O-shaped ring.
Preferably, the plunger rod is made of teflon, stainless steel or rubber.
Preferably, the plunger head is made of PEEK.
Preferably, the liquid passing pipe is made of PEEK material.
Preferably, the plunger head is in an inverted T shape, a long socket is formed at the lower end of the plunger rod and used for the plunger head to be inserted, and the outlet penetrates through the plunger head and is connected with the liquid passing pipeline in an inserting mode.
Preferably, a first sealing gasket is arranged at the insertion position of the outlet and the liquid passing pipeline.
Preferably, the plunger rod further comprises a fixed seat and a stainless steel joint, and the upper end of the plunger rod is fixed at the bottom of the fixed seat through the stainless steel joint.
Preferably, the upper end of the liquid passing pipeline penetrates through the stainless steel joint, and a second sealing gasket is arranged at the upper end of the liquid passing pipeline.
After the technical scheme is adopted, the beneficial effects of the utility model reside in that:
1. because the plunger head and the plunger rod are separated and detachable, the plunger head and the plunger rod can be made of completely different materials, and the plunger rod can be made of any material, such as rubber, stainless steel and other materials with lower cost, so that the compatibility of the plunger rod is greatly improved. When the plunger rod is inserting the SPE post, because the plunger head diameter slightly is less than the plunger rod, so when inserting the plunger head can not contact SPE post inner wall, can not influence the characteristic that Teflon plunger head is kept when plug SPE post, make smooth and easy plug of plunger rod, avoid damaging O type circle. When the plunger rod is inserted in place, the solvent or the sample enters the SPE column through the liquid passing pipeline, the material contacted with the SPE column only passes through the liquid passing pipeline and the plunger head, and the O-shaped ring separates the plunger rod and the plunger head, so that the solvent or the sample cannot be contacted with the plunger rod, the flowing path of the solvent or the sample is guaranteed to be limited, and the extraction effect cannot be influenced by the material of the plunger rod.
2. The utility model discloses need not only can accomplish manually with the help of instruments such as spanners that the plunger head is pegged graft at the plunger rod lower extreme, it is convenient, quick to install, is fit for the different applications of plunger rod, and whole process need not to relate to the dismantlement of plunger rod, and overall structure is succinct moreover, and the cost is lower.
Drawings
Fig. 1 is a schematic structural view of a conventional plunger rod.
Fig. 2 is a schematic view of the overall structure of the plunger rod according to an embodiment of the present invention.
Fig. 3 is a schematic structural view illustrating the use of a plunger rod in conjunction with an SPE column according to an embodiment of the present invention.
Description of reference numerals:
plunger rod 1, annular groove 11, cross liquid pipeline 2, plunger head 3, export 31, O type circle 4, fixing base 5, stainless steel joint 6, first sealed 7, the sealed 8 of second, SPE post 9 of filling.
Detailed Description
It should be noted that what this application was aimed at is only when the problem that the condition of current plunger rod adoption teflon material met, and the problem that the material produced is only the surface of problem, what this application was solved more deeply is to block the intercommunication of sample and plunger rod from the structure to can stop the influence of the material of plunger rod to sample extraction result from the structure, make the material of plunger rod can be according to user's needs or the restriction of material at present and decide.
The present invention will be described in detail with reference to fig. 2 and 3 and the specific embodiments.
The utility model provides a plunger rod that liquid sample was used, as shown in fig. 2, including plunger rod 1, cross liquid pipeline 2, plunger head 3, O type circle 4, fixing base 5, stainless steel joint 6, first sealed 7 and the sealed 8 of second of filling up, the upper end of plunger rod 1 is passed through stainless steel joint 6 is fixed the bottom of fixing base 5.
The plunger head 3 is detachably connected to the lower end of the plunger rod 1, because the plunger head 3 and the plunger rod 1 are separated and detachable, the plunger head 3 and the plunger rod 1 can be made of two completely different materials, the plunger rod 1 can be made of any material, such as teflon, rubber, stainless steel and other lower-cost materials, in one embodiment, the plunger rod 1 is made of teflon, the teflon has certain elasticity, lubricity and compatibility, and the plunger head 3 is made of PEEK and can be used in a specific application environment.
The liquid passing pipeline 2 is arranged inside the plunger rod 1, an outlet 31 communicated with the liquid passing pipeline 2 is formed in the lower end face of the plunger head 3, an annular groove 11 is formed in the outer wall of the lower end of the plunger rod 1, the O-shaped ring 4 is arranged in the annular groove 11, the diameter of the lower end face of the plunger head 3 is smaller than that of the plunger rod 1, and the outer peripheral edge of the plunger head 3 is abutted to the O-shaped ring 4.
In an embodiment, the plunger head 3 is tightly connected to the lower end of the plunger rod 1 in an insertion manner, and of course, other connection manners such as a screw connection manner may also be adopted, which is not limited in this case. The plunger head 3 is inverted T-shaped, a long socket is formed at the lower end of the plunger rod 1 for the plunger head 3 to be inserted, and the outlet 31 penetrates through the plunger head 3 and is connected with the liquid passing pipeline 2 in an inserting mode. In order to improve the air tightness of the plunger head 3, a first sealing gasket 7 (specifically, a compression type sealing gasket) is arranged at the joint of the outlet 31 of the plunger head 3 and the liquid passing pipeline 2. The liquid passing pipeline 2 is made of PEEK.
The biggest characteristic of the utility model is that, as shown in fig. 3, when inserting plunger rod 1 and targetting in place, solvent or sample get into SPE post 9 through crossing liquid pipeline 2, and the material that contacts during only crosses liquid pipeline 2 and plunger head 3, and O type circle 4 is sealed in addition between Teflon plunger rod 1 and the plunger head 3, can not contact with Teflon plunger rod 1 to guarantee Teflon plunger rod 1 can not influence the extraction effect.
The upper end of crossing liquid pipeline 2 runs through stainless steel connects 6, the upper end of crossing liquid pipeline 2 is equipped with the sealed pad 8 of second (specifically for compressing tightly the type sealed pad). Therefore, the upper and lower ends of the liquid passing pipe 2 are sealed by two gaskets.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the design of the present application, and all equivalent changes made according to the design key of the present application fall within the protection scope of the present application.
Claims (8)
1. The plunger rod for sampling the liquid samples is characterized by comprising a plunger rod, a liquid passing pipeline, a plunger head and an O-shaped ring, wherein the plunger head is detachably connected to the lower end of the plunger rod, the liquid passing pipeline is arranged inside the plunger rod, an outlet communicated with the liquid passing pipeline is formed in the lower end surface of the plunger head, an annular groove is formed in the outer wall of the lower end of the plunger rod, the O-shaped ring is arranged in the annular groove, the diameter of the lower end surface of the plunger head is smaller than that of the plunger rod, and the outer periphery of the plunger head is abutted against the O-shaped ring.
2. A plunger rod for sampling a liquid sample according to claim 1, wherein: the plunger rod is made of Teflon, stainless steel or rubber.
3. A plunger rod for sampling a liquid sample according to claim 1, wherein: the plunger head is made of PEEK.
4. A plunger rod for sampling a liquid sample according to claim 1, wherein: the liquid passing pipe is made of PEEK materials.
5. A plunger rod for sampling a liquid sample according to claim 1, wherein: the plunger head is inverted T-shaped, a long socket is formed in the lower end of the plunger rod and used for the plunger head to insert, and the outlet penetrates through the plunger head and is connected with the liquid passing pipeline in an inserting mode.
6. A plunger rod for sampling a liquid sample according to claim 5, wherein: and a first sealing gasket is arranged at the splicing part of the outlet and the liquid passing pipeline.
7. A plunger rod for sampling a liquid sample according to claim 1, wherein: the plunger rod comprises a plunger rod body and is characterized by further comprising a fixed seat and a stainless steel joint, wherein the upper end of the plunger rod body is fixed at the bottom of the fixed seat through the stainless steel joint.
8. A plunger rod for sampling a liquid sample according to claim 7, wherein: the upper end of the liquid passing pipeline penetrates through the stainless steel joint, and a second sealing gasket is arranged at the upper end of the liquid passing pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120289614.1U CN214636510U (en) | 2021-02-02 | 2021-02-02 | Plunger rod for sampling liquid sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120289614.1U CN214636510U (en) | 2021-02-02 | 2021-02-02 | Plunger rod for sampling liquid sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214636510U true CN214636510U (en) | 2021-11-09 |
Family
ID=78521365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120289614.1U Active CN214636510U (en) | 2021-02-02 | 2021-02-02 | Plunger rod for sampling liquid sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214636510U (en) |
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2021
- 2021-02-02 CN CN202120289614.1U patent/CN214636510U/en active Active
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