CN216742798U - Sample cracking chamber sealing structure of thermal cracking detector - Google Patents
Sample cracking chamber sealing structure of thermal cracking detector Download PDFInfo
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- CN216742798U CN216742798U CN202123397637.3U CN202123397637U CN216742798U CN 216742798 U CN216742798 U CN 216742798U CN 202123397637 U CN202123397637 U CN 202123397637U CN 216742798 U CN216742798 U CN 216742798U
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Abstract
The utility model relates to the technical field of thermal cracking detectors, and particularly discloses a sample cracking chamber sealing structure of a thermal cracking detector. The sample cracking chamber sealing structure comprises a quartz cracking chamber, an upper connecting plate and a lower connecting plate which are respectively arranged at the upper end and the lower end of the quartz cracking chamber and are parallel to each other; the top surface of the lower connecting plate and the bottom surface of the upper connecting plate are both provided with positioning grooves, the inner bottom surfaces of the positioning grooves are provided with through holes and annular grooves which are communicated with the inside of the quartz cracking chamber, and the annular grooves are coaxially arranged with the through holes and are provided with O-shaped sealing rings; the lower connecting plate is connected with the upper connecting plate through a guide limiting structure. This sample cracking room seal structure has better sealed effect to reduce the processing degree of difficulty, solved and compressed tightly the not easily controlled problem that causes the cracked room of cracking because of the installation.
Description
Technical Field
The utility model relates to the technical field of thermal cracking detectors, in particular to a sample cracking chamber sealing structure of a thermal cracking detector.
Background
In the existing thermal cracking detection instrument, the sealing structure of the sample cracking chamber mainly has two types, one type is as shown in figure 1, and flat gasket sealing rings 11 are arranged on the upper end surface and the lower end surface of a quartz cracking chamber 1; as shown in FIG. 2, grooves are formed in the upper and lower end surfaces of a quartz cracking chamber, and O-rings 6 are pressed into the grooves. However, the former sealing structure has the problems of difficult processing and poor sealing effect of the cracking chamber, and the latter sealing structure has the problems of difficult control of the installation and compression force, cracking of the cracking chamber and the like.
Disclosure of Invention
The utility model aims to provide a sample cracking chamber sealing structure of a thermal cracking detector, which has a good sealing effect, reduces the processing difficulty and solves the problem of cracking of a cracking chamber caused by difficulty in control of the installation and compression force.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a sample cracking chamber sealing structure of a thermal cracking detector comprises a quartz cracking chamber, and an upper connecting plate and a lower connecting plate which are respectively arranged at the upper end and the lower end of the quartz cracking chamber and are parallel to each other; the top surface of the lower connecting plate and the bottom surface of the upper connecting plate are both provided with positioning grooves, the inner bottom surfaces of the positioning grooves are provided with through holes and annular grooves which are communicated with the inside of the quartz cracking chamber, and the annular grooves are coaxially arranged with the through holes and are provided with O-shaped sealing rings; the lower connecting plate is connected with the upper connecting plate through a guide limiting structure.
Furthermore, the guide limiting structure comprises at least two guide posts connected to the lower connecting plate, and the upper connecting plate is provided with two guide holes respectively in sliding fit with the two guide posts; a limiting part for limiting the upper connecting plate is convexly arranged on the outer side surface of the guide post; the upper end of guide post is provided with the external screw thread section, external screw thread section threaded connection has gland nut.
Furthermore, the top surface of the lower connecting plate is provided with a positioning clamping groove for clamping the lower end of the guide post.
Further, the upper connecting plate and the lower connecting plate are stainless steel plates.
Furthermore, an air inlet communicated with the through hole is formed in the side face of the upper connecting plate.
The utility model has the beneficial effects that: the sample cracking chamber sealing structure of the thermal cracking detector has a good sealing effect; the annular grooves for placing the O-shaped sealing rings are formed in the upper connecting plate and the lower connecting plate, so that grooves are prevented from being formed in the end faces of the quartz cracking chamber, the processing difficulty is reduced, and the rigidity of the quartz cracking chamber is improved; during installation, the upper end and the lower end of the quartz cracking chamber are located through the two locating grooves, and then the upper connecting plate and the lower connecting plate are connected through the guide limiting structure, so that the quartz cracking chamber is fixed, the pressing depth of the upper connecting plate is controllable, the problem that the cracking chamber is cracked due to the fact that the installation pressing force is not easy to control is solved, and the uniformity of the assembled product is relatively good; in addition, compared with the existing cracking chamber, the manufacturing cost is reduced by about 30 percent, and the cracking chamber has more market competitiveness.
Drawings
FIG. 1 is a schematic structural view of a sealing structure of a conventional cracking chamber;
FIG. 2 is a schematic structural view of another prior art cracking chamber sealing structure;
fig. 3 is a schematic structural diagram of a sample cracking chamber sealing structure of a thermal cracking detector provided by the utility model.
In the figure, 1-quartz cracking chamber; 11-flat gasket seal ring; 2-an upper connecting plate; 21-air intake; 3-a lower connecting plate; 31-positioning card slot; 4-positioning a groove; 5-a through hole; 6-O type sealing ring; 7-a guiding and limiting structure; 71-a guide post; 711-a limiting part; 712-external thread section; 72-compression nut.
Detailed Description
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 3, a sample cracking chamber sealing structure of a thermal cracking detector comprises a quartz cracking chamber 1, and an upper connecting plate 2 and a lower connecting plate 3 which are respectively disposed at the upper end and the lower end of the quartz cracking chamber 1 and are parallel to each other.
Specifically, the top surface of lower connecting plate 3 and the bottom surface of upper junction plate 2 have all been seted up constant head tank 4, and these two constant head tanks 4 are used for fixing a position 1 upper end and lower extreme of quartzy schizolysis room respectively. Wherein, the through-hole 5 and the ring channel that link up with the inside of quartzy schizolysis room 1 are seted up to the interior bottom surface of constant head tank 4, and this ring channel sets up with through-hole 5 is coaxial, and is provided with O type sealing washer 6. The lower connecting plate 3 is connected with the upper connecting plate 2 through a guiding and limiting structure 7.
Further, the guiding and limiting structure 7 comprises at least two guiding posts 71 connected to the lower connecting plate 3, and the upper connecting plate 2 is provided with two guiding holes respectively in sliding fit with the two guiding posts 71. A stopper 711 for stopping the upper link plate 2 is protruded from the outer surface of the guide post 71. The upper end portion of the guide post 71 is provided with an externally threaded section 712, and the externally threaded section 712 is threadedly connected with the compression nut 72.
The top surface of the lower connecting plate 3 is provided with a positioning slot 31 for the lower end of the guide column 71 to be inserted.
In the present invention, the upper connection plate 2 and the lower connection plate 3 are preferably stainless steel plates. Wherein, constant head tank 4, through-hole 5 and ring channel all adopt CNC processing to form, and the machining precision is high.
In addition, the side surface of the upper connecting plate 2 is provided with an air inlet 21 communicated with the through hole 5.
When the sample cracking chamber sealing structure of the thermal cracking detector is installed, the O-shaped sealing ring 6 is firstly placed in the annular groove, then the two ends of the quartz cracking chamber 1 are respectively aligned to the two positioning grooves 4 and then placed in the annular groove, and then the compression nut is uniformly, forcibly and slowly locked downwards until the upper connecting plate is contacted with the limiting part 711 of the guide column 71, namely the STOP limiting position of the guide column. The sealing structure of the sample cracking chamber has a good sealing effect; because no groove is required to be formed on the end face of the quartz cracking chamber, the processing difficulty is reduced, the rigidity of the quartz cracking chamber is improved, the problem of cracking of the cracking chamber caused by difficulty in control of the installation compression force is solved, and the consistency of the assembled product is relatively good; in addition, compared with the existing cracking chamber, the manufacturing cost is reduced by about 30 percent, and the cracking chamber has market competitiveness.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the present invention.
Claims (5)
1. A sample cracking chamber sealing structure of a thermal cracking detector is characterized by comprising a quartz cracking chamber (1), and an upper connecting plate (2) and a lower connecting plate (3) which are respectively arranged at the upper end and the lower end of the quartz cracking chamber (1) and are parallel; the top surface of the lower connecting plate (3) and the bottom surface of the upper connecting plate (2) are both provided with positioning grooves (4), the inner bottom surfaces of the positioning grooves (4) are provided with through holes (5) and annular grooves which are communicated with the inside of the quartz cracking chamber (1), the annular grooves and the through holes (5) are coaxially arranged, and O-shaped sealing rings (6) are arranged; the lower connecting plate (3) is connected with the upper connecting plate (2) through a guide limiting structure (7).
2. The sample lysis chamber sealing structure according to claim 1, wherein the guide limiting structure (7) comprises at least two guide posts (71) connected to the lower connecting plate (3), and the upper connecting plate (2) is provided with two guide holes respectively slidably engaged with the two guide posts (71); a limiting part (711) used for limiting the upper connecting plate (2) is convexly arranged on the outer side surface of the guide column (71); the upper end part of the guide column (71) is provided with an external thread section (712), and the external thread section (712) is in threaded connection with a compression nut (72).
3. The sample lysis chamber sealing structure according to claim 2, wherein the top surface of the lower connecting plate (3) is provided with a positioning slot (31) for the lower end of the guide column (71) to be clamped into.
4. The sample lysis chamber sealing structure according to claim 1, wherein the upper connecting plate (2) and the lower connecting plate (3) are stainless steel plates.
5. The sealing structure of the sample splitting chamber according to claim 1, wherein the side surface of the upper connecting plate (2) is provided with an air inlet hole (21) communicated with the through hole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123397637.3U CN216742798U (en) | 2021-12-31 | 2021-12-31 | Sample cracking chamber sealing structure of thermal cracking detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123397637.3U CN216742798U (en) | 2021-12-31 | 2021-12-31 | Sample cracking chamber sealing structure of thermal cracking detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216742798U true CN216742798U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123397637.3U Active CN216742798U (en) | 2021-12-31 | 2021-12-31 | Sample cracking chamber sealing structure of thermal cracking detector |
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| CN (1) | CN216742798U (en) |
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2021
- 2021-12-31 CN CN202123397637.3U patent/CN216742798U/en active Active
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