CN219285119U - Sample injector - Google Patents
Sample injector Download PDFInfo
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- CN219285119U CN219285119U CN202223166350.4U CN202223166350U CN219285119U CN 219285119 U CN219285119 U CN 219285119U CN 202223166350 U CN202223166350 U CN 202223166350U CN 219285119 U CN219285119 U CN 219285119U
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Abstract
The utility model provides a sample injector which comprises a sample injection part, a connecting part and a sample storage part which are sequentially connected, wherein the sample injection part is provided with a sample injection fluid channel, the connecting part is provided with a connecting fluid channel, a valve is arranged on the connecting part, the sample storage part is provided with a sample storage cavity, and the sample injection fluid channel, the connecting fluid channel and the sample storage cavity are sequentially communicated. The sample injector integrates sampling and sample injection, can reduce volatilization of a sample, improve the accuracy of measurement, reduce the workload of an operator and reduce measurement errors caused by inaccurate sample injection process.
Description
Technical Field
The utility model relates to the technical field of chemical equipment, in particular to a sample injector.
Background
The requirements of 10.2.1 in the Karl Fischer coulometric titration for determining the water content in petroleum products, lubricating oils and additives in the national standard GB/T11133-2015 on sample injection are as follows: selecting a clean, dry and proper-capacity syringe, sucking and discarding at least 3 times of samples, immediately sucking a sample, wiping the needle with a clean filter paper, weighing, penetrating the syringe needle through the sample inlet diaphragm of the instrument, immersing below the liquid level of the anode, starting titration and injecting the sample, extracting the syringe, wiping the needle with the filter paper, and weighing.
The unit adopts the karl fischer coulometric titration method to measure the water value in the monomer mixed solution and the solvent essential oil which participate in the reaction, and the water content can preferentially react with the catalyst in the polymerization reaction to reduce the quantity of the effective catalyst, so that the conditions of product quality fluctuation, even polymerization reaction stall and the like are caused, and therefore, the accurate acquisition and control of the water content in a reaction system is very important. However, the polymerization reaction of the removing device has strict requirements on the water content, and besides the sampling and sample introduction processes are easily interfered by the water in the air, the solvent hexane, the mixed butadiene solution and the mixed styrene solution are easy to volatilize, so that deviation is caused to the weighing of the sample introduction amount, and a certain interference is brought to the measurement of the accurate value of the water content.
CN208621379U is a closed liquid sampler, comprising three connecting parts including a liquid circulation cavity, a gas circulation cavity and a sampling port, the middle part of the sampler can be connected with inert gas to isolate the contact between organic liquid and air in the sampling process, and the influence of moisture in air on the measurement result is avoided. After the sampler is used for obtaining an organic matter sample, a needle cylinder with good tightness is required to be adopted for sample injection, sampling and sample injection integrated operation cannot be completed, and the steps are complicated.
Disclosure of Invention
The utility model provides a sample injector for measuring the water content in an organic matter, which can reduce the volatilization of a sample, improve the measurement accuracy, reduce the workload of an operator and reduce the measurement error caused by inaccurate sample injection process.
To achieve the above and other related objects, the present utility model provides a sample injector, including a sample injection portion, a connection portion, and a sample storage portion, which are sequentially connected, where the sample injection portion is provided with a sample injection fluid channel, the connection portion is provided with a connection fluid channel, the connection portion is provided with a valve, and the sample storage portion is provided with a sample storage cavity, and the sample injection fluid channel, the connection fluid channel, and the sample storage cavity are sequentially communicated.
Preferably, the sample injection part comprises a sample injection needle head and a sample injection needle seat which are connected, and the sample injection needle seat is connected with the connecting part.
Preferably, the connecting part comprises a connecting joint, a connecting main part and a holding part which are sequentially connected, wherein the connecting joint is connected with the sample injection part, and the holding part is connected with the sample storage part.
More preferably, the connecting part comprises a connecting joint, a connecting main part and a holding part which are sequentially connected, wherein the connecting joint is connected with the sample injection needle seat, and the holding part is connected with the sample storage part.
More preferably, the connecting part further comprises a transition piece, and the connecting joint, the transition piece, the connecting main piece and the holding piece are sequentially connected.
Still more preferably, the radial area of the transition piece increases gradually from the proximal connection tab end to the distal connection tab end.
More preferably, the grip is a hexagonal prism.
Preferably, the connecting portion and the sample storage portion are in threaded connection.
More preferably, the connecting part is provided with a connecting piece near the sample storage part end, the sample storage part comprises a sample storage connecting piece and a sample storage container which are connected, and the connecting piece is connected with the sample storage connecting piece through threads.
Still more preferably, the connection part includes a connection joint, a connection main part, a grip part and the connection part connected in sequence, or the connection part includes a connection joint, a transition part, a connection main part, a grip part and the connection part connected in sequence;
and/or, the inner wall of the connecting piece is sequentially provided with a sealing ring mounting groove and an internal thread, the sealing ring mounting groove is positioned at the end of the far sample storage connecting piece, the inner wall of the connecting piece is also provided with a sealing ring, the sealing ring is arranged in the sealing ring mounting groove, the outer wall of the sample storage connecting piece is provided with an external thread, and the internal thread is matched with the external thread;
and/or, the sample storage part further comprises a breakage-proof belt, and the breakage-proof belt is arranged on the outer wall of the sample storage container in a surrounding mode.
The utility model has at least one of the following beneficial effects:
1) The sample injector has the advantages of simple structure, simple operation and economy and is worthy of popularization and use.
2) The sample injector can reduce the contact between the sample and the air in the whole process of measurement, can also reduce the volatilization of the sample, improve the measurement accuracy, reduce the workload of an operator and reduce the measurement error caused by inaccurate sample injection process.
3) The sampler is used for measuring the water content in the organic matters, integrates sampling and sampling, has a clear structure, is simple to operate and is airtight in the whole process, so that the contact between the sample and air in the whole measuring process can be basically avoided, the volatilization of the sample can be reduced, the measuring accuracy is improved, and the workload of an operator is reduced.
4) The appearance design of the sampler accords with the principle of human mechanics, is suitable for the measurement standard of the water content in organic matters, has simple operation flow and process, can be used immediately after being taken by a user, can be started without complicated training, and is simple to maintain.
Drawings
Fig. 1 is a schematic diagram of a sample injector according to a first embodiment of the present utility model.
Fig. 2 is an exploded view of a sample injector according to a first embodiment of the present utility model.
Fig. 3 is a top view of the connection joint and transition piece of the injector of the first embodiment of the present utility model.
Fig. 4 is a schematic diagram of a connection portion in a sample injector according to a first embodiment of the present utility model.
Fig. 5 is an exploded view of the connector and reservoir of the sample injector according to the first embodiment of the present utility model.
Fig. 6 is a schematic diagram of a sample storage portion in a sample injector according to a second embodiment of the present utility model.
Reference numerals:
1. sample injection part
11. Sample injection needle
12. Sample injection needle seat
2. Connecting part
21. Connecting joint
22. Connecting main part
23. Holding piece
24. Transition piece
25. Connecting piece
251. Internal thread
252. Sealing ring
3. Sample storage part
31. Sample storage cavity
32. Sample storage connecting piece
321. External screw thread
33. Sample storage container
34. Breakage-proof belt
4. Valve
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model.
A sample injector, as shown in figures 1 and 2, comprises a sample injection part 1, a connecting part 2 and a sample storage part 3 which are connected in sequence, wherein the sample injection part 1 is provided with a sample injection fluid channel, the connecting portion 2 is provided with a connecting fluid channel, the connecting portion 2 is provided with a valve 4, the sample storage portion 3 is provided with a sample storage cavity 31, and the sample injection fluid channel, the connecting fluid channel and the sample storage cavity 31 are sequentially communicated.
The sample injector has the advantages of simple structure, simple operation and economy and is worthy of popularization and use. The valve 4 is used for opening and cutting off a sample channel, specifically, controlling the sample to be sampled from the sample feeding portion 1 to the sample storing portion 3, and the sample to be sampled from the sample storing portion 3 to the moisture meter through the sample feeding portion 1, and can be various valves in the prior art, such as ball valve, needle valve, butterfly valve, etc.
Specifically, as shown in fig. 4, the valve is provided with a rotary switch, the opening of the valve is controlled, and the rotary switch can be provided with anti-skid threads, so that the valve is convenient to rotate. When sampling is performed, the valve 4 is slowly opened, and after a proper amount of sample enters the sample storage part 3, the valve 4 is closed, and the sampling is completed; and after the moisture meter is ready, weighing the mass of the integral sample injector by using a balance, enabling the sample injection part 1 to enter a sample injection spacer of the moisture meter to be below the liquid level of the moisture meter, opening the valve 4 to inject a proper amount of sample, closing the valve 4, weighing the mass of the sample injector by using the balance again, wherein the difference between the two weighing masses is the injected sample amount, inputting the sample amount into the moisture meter, and displaying fractional measurement values by the instrument after the test is finished.
Specifically, the sample injection part 1 is in sealing connection with the connecting part 2, and the connecting part 2 is in sealing connection with the sample storage part 3.
The sampler integrates sampling and sampling, can reduce volatilization of a sample, improve measurement accuracy, reduce workload of an operator and reduce measurement errors caused by inaccurate sampling process.
In a specific embodiment, the sample injection part 1 comprises a sample injection needle 11 and a sample injection needle seat 12 which are connected, and the sample injection needle seat 12 is connected with the connecting part 2. The valve 4 controls the sample to be sampled from the sampling needle 11 to the sample storage part 3, and the sample is sampled from the inside of the sample storage part 3 to the moisture meter through the sampling needle 11. Specifically, the material of the sampling needle 11 may be stainless steel, the length may be 70-90 mm, such as 80mm, the inner diameter may be 0.8-1.0 mm, such as 0.9mm, the radial outer diameter of the sampling needle seat far sampling needle head end is 4.5-5.5 mm, such as 5mm, and the inner diameter is 1.5-2.5 mm, such as a 2mm sample channel.
Specifically, the connection part 2 may be made of stainless steel, and may be cylindrical with a length of 140-160 mm, such as 150mm, and communicated with each other.
In a specific embodiment, the connection part 2 comprises a connection joint 21, a connection main part 22 and a holding part 23 which are sequentially connected, the connection joint 21 is connected with the sample injection part 1, and the holding part 23 is connected with the sample storage part 3.
In a specific embodiment, the connecting part 2 comprises a connecting joint 21, a connecting main part 22 and a holding part 23 which are sequentially connected, the connecting joint 21 is connected with the sample injection needle seat 12, and the holding part 22 is connected with the sample storage part 3. Specifically, the connection joint 21 is in sealing connection with the sample injection needle seat 12, and can be realized by a plug-in connection mode. The total length of the connection part 2 may be 140 to 160mm, such as 150mm, the outer diameter of the connection main member 22 may be 9 to 11mm, such as 10mm, the length may be 45 to 55mm, such as 50mm, the inner diameter may be 1.5 to 2.5mm, such as 2mm, the length of the sample channel of the grip member 23 may be 70 to 90mm, such as 80mm, the circumscribed circle diameter may be 18 to 22mm, such as 20mm, and the inner diameter may be 1.5 to 2.5mm, such as 2mm.
In a specific embodiment, the connection part 2 further comprises a transition piece 24, and the connection joint 21, the transition piece 24, the connection main piece 22 and the grip piece 23 are connected in sequence. The radial outer diameter of the near-connecting joint end of the transition piece is 4.5-5.5 mm, such as 5mm, the inner diameter is 1.5-2.5 mm, such as 2mm, of the sample channel, the radial outer diameter of the far-connecting joint end of the transition piece is 9-11 mm, such as 10mm, and the inner diameter is 1.5-2.5 mm, such as 2mm, of the sample channel.
In a particular embodiment, as shown in fig. 3 and 4, the radial area of the transition piece 24 increases gradually from the proximal connector end to the distal connector end.
In one embodiment, as shown in fig. 4, the gripping member 23 is a hexagonal prism shape, which is convenient for one-hand gripping.
In a specific embodiment, the connection portion 2 and the sample storage portion 3 are screw-connected.
In a specific embodiment, as shown in fig. 5, the connecting part 2 is provided with a connecting piece 25 near the sample storage part end, the sample storage part 3 comprises a sample storage connecting piece 31 and a sample storage container 32 which are connected, and the connecting piece 25 is connected with the sample storage connecting piece 31 through threads. Specifically, the sample storage container 32 may have a height of 45 to 50mm, such as 50mm, a diameter of 27 to 33mm, such as 30mm, and a capacity of 15 to 25mL, such as 20mL.
The material of the sample storage portion 3 may be a pressure-resistant glass material.
In a specific embodiment, the connection part 2 includes a connection joint 21, a connection main member 22, a grip member 23, and a connection member 25 connected in sequence, or the connection part 2 includes a connection joint 21, a transition member 24, a connection main member 22, a grip member 23, and a connection member 25 connected in sequence;
in a specific embodiment, as shown in fig. 5, a seal ring installation groove and an internal thread 251 are sequentially provided on the inner wall of the connecting piece 25, the seal ring installation groove is located at the end of the far sample storage connecting piece, a seal ring 252 is further provided on the inner wall of the connecting piece 25, the seal ring 252 is provided in the seal ring installation groove, an external thread 321 is provided on the outer wall of the sample storage connecting piece 31, and the internal thread 251 is matched with the external thread 321. The connecting portion 2 and the sample storage portion 3 are screwed with the external thread 321 via the internal thread 251. Seal 252 may be an O-ring seal.
In a specific embodiment, as shown in fig. 6, the sample storage section 3 further includes a breakage-proof band 34, and the breakage-proof band 34 is circumferentially disposed on the outer wall of the sample storage container 33. The breakage-proof tape 34 may be made of a breakage-proof material, such as a teflon tape made of a teflon material, as a measure for preventing breakage.
Before sampling, the sample injection part 1, the connecting part 2 and the sample storage part 3 shown in fig. 2 are respectively purged by high-purity nitrogen, the sample injection part 1, the connecting part 2 and the sample storage part 3 are connected immediately after the sample injection part is dried completely, specifically, the sample injection needle seat 12 and the connecting joint 21 are connected, the internal thread 251 and the external thread 321 are connected, and the sample injection needle seat is screwed tightly and sealed; the holding piece 23 can be held by a left hand, the sampling needle 11 is pricked into a sampling point spacer of the device, the valve 4 is slowly opened by a right hand, and the valve 4 is closed after a proper amount of sample enters the sample storage part 3, and the sampling is completed; the method comprises the steps that after the moisture meter is prepared, the weight of the whole sample injector is weighed by a balance, a holding piece 23 can be held by a left hand, one end of a sample injection needle 11 is vertically downward, the sample injection needle 11 is pricked into a sample injection spacer of the moisture meter to be below the liquid level of the instrument, a valve 4 can be slowly opened by a right hand to inject a proper amount of sample, the valve 4 is closed, the weight of the sample injector is weighed by the balance again, the difference between the two weighing weights is the injected sample amount, the injected sample amount is input into the moisture meter, and the instrument displays a fraction measurement value after the test is finished; and (5) after the test is finished, the sample in the sample injector is emptied, cleaned and dried for later use.
While the utility model has been described with respect to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims. Equivalent embodiments of the present utility model will be apparent to those skilled in the art having the benefit of the teachings disclosed herein, when considered in the light of the foregoing disclosure, and without departing from the spirit and scope of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims (10)
1. The sample injector is characterized by comprising a sample injection part (1), a connecting part (2) and a sample storage part (3) which are sequentially connected, wherein the sample injection part (1) is provided with a sample injection fluid channel, the connecting part (2) is provided with a connecting fluid channel, the connecting part (2) is provided with a valve (4), the sample storage part (3) is provided with a sample storage containing cavity (31), and the sample injection fluid channel, the connecting fluid channel and the sample storage containing cavity (31) are sequentially communicated.
2. The sample injector according to claim 1, characterized in that the sample injection part (1) comprises a sample injection needle (11) and a sample injection needle seat (12) which are connected, the sample injection needle seat (12) being connected with the connecting part (2).
3. The sample injector according to claim 1, characterized in that the connecting part (2) comprises a connecting joint (21), a connecting main part (22) and a holding part (23) which are sequentially connected, the connecting joint (21) is connected with the sample injection part (1), and the holding part (23) is connected with the sample storage part (3).
4. The sample injector according to claim 2, characterized in that the connecting part (2) comprises a connecting joint (21), a connecting main part (22) and a holding part (23) which are sequentially connected, the connecting joint (21) is connected with the sample injection needle seat (12), and the holding part (23) is connected with the sample storage part (3).
5. The injector according to claim 3 or 4, characterized in that the connection part (2) further comprises a transition piece (24), the connection joint (21), the transition piece (24), the connection main piece (22) and the grip piece (23) being connected in sequence.
6. The injector of claim 5, characterized in that the transition piece (24) increases in radial area from the proximal connector end to the distal connector end.
7. The injector according to claim 3 or 4, characterized in that the grip (23) is hexagonal prism-shaped.
8. The sample injector according to claim 1, characterized in that the connection part (2) and the sample storage part (3) are threaded.
9. The sample injector according to claim 8, characterized in that the connecting part (2) is provided with a connecting piece (25) near the sample storage part end, the sample storage part (3) comprises a sample storage connecting piece (32) and a sample storage container (33) which are connected, and the connecting piece (25) is connected with the sample storage connecting piece (32) through threads.
10. The injector according to claim 9, characterized in that the connection part (2) comprises a connection joint (21), a connection main part (22), a grip part (23) and the connection part (25) connected in sequence, or the connection part (2) comprises a connection joint (21), a transition part (24), a connection main part (22), a grip part (23) and the connection part (25) connected in sequence;
and/or, the inner wall of the connecting piece (25) is sequentially provided with a sealing ring mounting groove and an internal thread (251), the sealing ring mounting groove is positioned at the end of the far sample storage connecting piece, the inner wall of the connecting piece (25) is also provided with a sealing ring (252), the sealing ring (252) is arranged in the sealing ring mounting groove, the outer wall of the sample storage connecting piece (32) is provided with an external thread (321), and the internal thread (251) is matched with the external thread (321);
and/or, the sample storage part (3) further comprises a breakage-proof belt (34), and the breakage-proof belt (34) is circumferentially arranged on the outer wall of the sample storage container (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223166350.4U CN219285119U (en) | 2022-11-28 | 2022-11-28 | Sample injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223166350.4U CN219285119U (en) | 2022-11-28 | 2022-11-28 | Sample injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219285119U true CN219285119U (en) | 2023-06-30 |
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ID=86931608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223166350.4U Active CN219285119U (en) | 2022-11-28 | 2022-11-28 | Sample injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219285119U (en) |
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2022
- 2022-11-28 CN CN202223166350.4U patent/CN219285119U/en active Active
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