CN219062761U - Automatic on-off gas circuit system for crimping sample tube - Google Patents

Abstract

The utility model discloses an automatic gas switching system for sample tube crimping, which comprises a gas-tight crimping connector, wherein the gas-tight crimping connector is movable along a first direction and is used for crimping with a sample tube, the gas-tight crimping connector is provided with a gas channel connecting side wall, and the gas channel connecting side wall is provided with a gas channel connecting port; the self-locking gas circuit connector is fixed in position and comprises a connector body, and an equipment extension gas circuit communicated with a sample analysis equipment gas circuit is arranged in the connector body; when the airtight crimping connector is positioned at the crimping position with the sample tube, the connector body is attached to the side wall of the gas circuit connection, and the gas circuit connection port is communicated with the equipment extension gas circuit. According to the automatic gas circuit switching system for sample pipe crimping, when the airtight crimping connector is positioned at the crimping position of the sample pipe, the connector body is attached to the gas circuit connecting side wall, the gas circuit connecting port is communicated with the equipment extension gas circuit, crimping efficiency is improved, and accuracy of experimental results is improved.

Description

Automatic on-off gas circuit system for crimping sample tube

Technical Field

The utility model relates to the technical field of sample analysis equipment, in particular to an automatic gas circuit switching system for crimping of a sample tube.

Background

The sample analysis device detects a sample by analyzing the amount of gas input to the sample tube and collecting data of the amount of gas discharged from the sample tube. In the prior art, gas transmission between sample analysis equipment and the sample tube is realized through the connecting air pipe generally, and the sample tube is crimped through the airtight crimping head before gas transmission to the sample tube so as to ensure the air tightness of the sample tube, and because the airtight crimping head has longer operation stroke and the connecting air pipe moves along with the operation stroke in the crimping process, the length of the connecting air pipe is longer, the longer connecting air pipe is easy to generate winding and knotting, and the residual gas volume in the connecting air pipe is inconvenient to quantify, so that the experimental result is influenced.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the automatic gas circuit switching system for the sample tube crimping, and the automatic gas circuit switching system for the sample tube crimping can improve the accuracy of experimental results.

According to the embodiment of the utility model, the automatic gas circuit switching system for crimping the sample tube comprises: the airtight pressure connector is movable along a first direction and used for being in pressure connection with the sample tube, and is provided with a gas path connecting side wall, and a gas path connecting port is formed in the gas path connecting side wall; the self-locking gas circuit connector is fixed in position and comprises a connector body, and an equipment extension gas circuit communicated with a gas circuit of sample analysis equipment is arranged in the connector body; when the airtight pressure connector is in a pressure connection position with the sample tube, the connector body is attached to the side wall of the air path connection, and the air path connection port is communicated with the equipment extension air path.

According to the automatic gas switching system for the sample tube crimping, the airtight crimping connector is arranged to be movable along the first direction and used for being crimped with the sample tube, the airtight crimping connector is provided with the gas channel connecting side wall, the gas channel connecting side wall is provided with the gas channel connecting port, the connector body is internally provided with the equipment extending gas channel communicated with the gas channel of the sample analysis equipment, when the airtight crimping connector is positioned at the crimping position of the sample tube, the connector body is attached to the gas channel connecting side wall and the gas channel connecting port is communicated with the equipment extending gas channel, and the gas channel communication between the sample analysis equipment and the sample tube is realized, so that the automatic gas switching of the automatic gas switching system for the sample tube crimping is realized, and the crimping efficiency is improved. Meanwhile, the self-locking gas circuit joint is fixed in position, and only the airtight pressure joint moves in the process of crimping the sample tube by the airtight pressure joint, so that winding or knotting caused by movement of the equipment extension gas circuit is avoided, the length of the equipment extension gas circuit can be shortened as much as possible, the residual gas volume in the equipment extension gas circuit is reduced, and the accuracy of an experimental result is improved.

In some embodiments of the utility model, the self-locking gas circuit joint further comprises: the telescopic connecting pipe is arranged in the connector body and faces the airtight pressure connector, the telescopic connecting pipe has elasticity moving towards the outside of the connector body, the outer diameter of the telescopic connecting pipe is larger than the caliber of the gas path connecting port, the equipment extension gas path is provided with a first gas port, and the telescopic connecting pipe is provided with a second gas port; when the telescopic connecting pipe naturally stretches out, the first air receiving port and the second air receiving port are staggered; when the airtight pressure connector is in a pressure connection position with the sample tube, the gas circuit connecting side wall is in fit with the connector body and presses the telescopic connecting tube into the connector body, the gas circuit connecting port is opposite to and communicated with the telescopic connecting tube, and the first gas connection port and the second gas connection port are mutually communicated.

In some embodiments of the present utility model, the connector body has a blind pipe hole therein for placing the telescopic adapter, the blind pipe hole extends along a second direction, the second direction is perpendicular to the first direction, and a first elastic member is disposed between the telescopic adapter and a blind end of the blind pipe hole.

In some embodiments of the utility model, the end of the telescopic adapter close to the blind end of the adapter blind hole is a closed end.

In some embodiments of the utility model, the first air receiving port is arranged on the side wall of the blind hole of the connecting pipe, and the second air receiving port is arranged on the peripheral wall of the telescopic connecting pipe.

In some embodiments of the present utility model, the connector body has a process hole, the process hole penetrates through the equipment extension gas path and the connection pipe blind hole, one end of the process hole, which is communicated with the external environment, is provided with an airtight bolt, and a part of the process hole, which is communicated with the equipment extension gas path and the connection pipe blind hole, is the first gas connection port.

In some embodiments of the present utility model, a telescopic limit groove is provided on a side wall of the blind hole of the adapter, a telescopic limit protrusion is provided on an outer side wall of the telescopic adapter, and the telescopic limit protrusion is movably provided in the telescopic limit groove.

In some embodiments of the present utility model, the telescopic limiting groove is in a ring shape extending along the circumferential direction of the blind hole and located at the opening end of the blind hole of the connecting pipe, the outer side of the telescopic limiting groove is open, the telescopic limiting protrusion is a nut in threaded fit with the telescopic connecting pipe, a limiting spiral ring is arranged in the telescopic limiting groove, the limiting spiral ring is spaced from the inner end of the telescopic limiting groove, and the peripheral wall of the limiting spiral ring is in threaded fit with the bottom wall of the telescopic limiting groove.

In some embodiments of the utility model, the gas path connection sidewall comprises: the air channel connecting port is arranged on the attaching section, and the attaching section is suitable for being attached to the joint body; the drive section, the drive section is located laminating section be close to one side of sample tube, the drive section is towards in the orientation of sample tube the orientation is kept away from the direction slope of joint body, the outer peripheral wall of the outer end of flexible takeover have with drive section complex direction inclined plane, the direction inclined plane is followed the circumference direction of flexible takeover extends, and in the direction of the outer end of flexible takeover to the inner, the direction inclined plane with distance between the center of flexible takeover increases gradually.

In some embodiments of the utility model, the hermetic pressure joint comprises: the connector rigid framework is provided with an airtight plug mounting column, an insertion hole and an air passage channel communicated with the insertion hole, and the air passage channel is communicated with the air passage connecting port; the elastic airtight plug is sleeved outside the airtight plug mounting column and used for crimping the sample tube.

In some embodiments of the present utility model, the number of the jacks is two, the number of the air channel is two corresponding to the two jacks, the number of the air channel connectors is two corresponding to the two air channel, and the number of the self-locking air channel connectors is two corresponding to the two air channel connectors.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a cross-sectional view of a sample tube according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of an elastically telescoping joint in accordance with an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a self-locking gas circuit fitting according to an embodiment of the utility model;

FIG. 4 is a partial cross-sectional view of a sample tube crimping automatic on-off gas circuit system according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of another state of the sample tube crimping automatic on-off gas circuit system according to an embodiment of the present utility model, wherein the gas-tight crimp head is in a crimped position with the sample tube;

FIG. 6 is an enlarged view at A in FIG. 4;

fig. 7 is an enlarged view at B in fig. 5.

Reference numerals:

100. the sample tube is in crimping connection with an automatic gas circuit switching system;

1. a sample tube; 11. a body portion; 12. a connection part; 121. an opening; 122. a positioning groove; 123. a supporting protrusion; 124. positioning the bulge;

2. an airtight press joint; 21. a joint rigid backbone; 211. the gas circuit is connected with the side wall; 2111. a bonding section; 2112. a drive section; 2113. the gas path connection port; 212. an airtight plug mounting column; 2121. a slip preventing protrusion; 213. a jack; 2131. a first jack; 2132. a second jack; 214. an air path channel; 2141. a gas transmission channel; 2142. an exhaust passage; 22. an elastic airtight plug; 221. an anti-slip groove; 23. a gas pipe; 24. an exhaust pipe; 25. crimping a transmission rod;

3. Self-locking gas circuit joint; 31. a joint body; 311. an equipment extension gas path; 3111. a first air receiving port; 312. connecting the blind hole; 3121. a telescopic limit groove; 313. a process hole; 314. an airtight bolt; 32. a telescopic connecting pipe; 321. a second gas receiving port; 322. a telescopic limit bulge; 323. a guide slope; 33. a first elastic member; 34. limiting a spiral ring;

4. a placing rack; 41. an elastic telescopic clamping part; 411. a clamping part bracket; 4111. placing the hole; 4112. a through hole; 4113. placing the notch; 412. a clamping column; 413. clamping a nut; 414. positioning the clamping joint; 415. a second elastic member; 42. a support part; 421. a first support block; 4211. a support step; 422. and a second support block.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

An automatic on-off gas circuit system 100 for crimping a sample tube according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1, 4, 5 and 7, the sample tube crimping automatic on-off gas circuit system 100 according to one embodiment of the present utility model includes a hermetic crimping connector 2 and a self-locking gas circuit connector 3. The airtight pressure connector 2 is movable along a first direction and is used for being in pressure connection with the sample tube 1, the airtight pressure connector 2 is provided with a gas path connecting side wall 211, a gas path connecting port 2113 is formed in the gas path connecting side wall 211, the self-locking gas path connector 3 is fixed in position, the self-locking gas path connector 3 comprises a connector body 31, and an equipment extension gas path 311 communicated with a gas path of sample analysis equipment is arranged in the connector body 31.

It will be appreciated that the sample tube 1 is used for holding a sample to be measured, the sample tube 1 has an opening 121, the opening 121 of the sample tube 1 faces the airtight crimp head 2 during crimping of the sample tube 1, and the airtight crimp head 2 is moved in a first direction toward the opening 121 by the airtight crimp head 2 to crimp the sample tube 1, thereby ensuring the air tightness of the sample tube 1.

The device extension gas circuit 311 is in gas circuit communication with the sample analysis device, as shown in fig. 5 and 7, when the airtight pressure joint 2 is in a pressure connection position with the sample tube 1, the joint body 31 is attached to the gas circuit connection side wall 211 and the gas circuit connection port 2113 is in communication with the device extension gas circuit 311, so that gas output by the sample analysis device gas circuit enters the sample tube 1 through the device extension gas circuit 311 and the gas circuit connection port 2113, or the gas in the sample tube 1 is discharged to the sample analysis device gas circuit through the gas circuit connection port 2113 and the device extension gas circuit 311, and further, the gas circuit communication between the sample analysis device and the sample tube 1 is realized when the airtight pressure joint 2 is in a pressure connection position with the sample tube 1; as shown in fig. 4, when the airtight pressure joint 2 is not in the pressure connection position with the sample tube 1, the communication of the gas path between the sample analysis device and the sample tube 1 is interrupted, so that the automatic gas-on/off of the sample tube pressure connection automatic gas-on/off system 100 is realized, the automation of the sample tube pressure connection automatic gas-on/off system 100 is facilitated, and the pressure connection efficiency is improved.

Meanwhile, because the self-locking gas circuit joint 3 is fixed in position, only the airtight pressure joint 2 moves in the process of crimping the airtight pressure joint 2 on the sample tube 1, so that winding or knotting caused by movement of the equipment extension gas circuit 311 is avoided, the length of the equipment extension gas circuit 311 can be shortened as much as possible, the residual gas volume in the equipment extension gas circuit 311 is reduced, and the accuracy of an experimental result is improved.

The sample analysis device includes, but is not limited to, a specific surface area detector, a pore size analyzer, a gas adsorber, and the like.

According to the sample tube crimping automatic on-off gas circuit system 100 provided by the embodiment of the utility model, the airtight pressure connector 2 is arranged to be movable along the first direction and used for crimping with the sample tube 1, the airtight pressure connector 2 is provided with the gas circuit connecting side wall 211, the gas circuit connecting side wall 211 is provided with the gas circuit connecting port 2113, the connector body 31 is internally provided with the equipment extension gas circuit 311 for communicating the gas circuit of the sample analysis equipment, and when the airtight pressure connector 2 is in the crimping position with the sample tube 1, the connector body 31 is attached to the gas circuit connecting side wall 211 and the gas circuit connecting port 2113 is communicated with the equipment extension gas circuit 311, so that the gas circuit communication between the sample analysis equipment and the sample tube 1 is realized, the automatic on-off gas circuit system 100 for crimping the sample tube is realized, and the crimping efficiency is improved. Meanwhile, because the self-locking gas circuit joint 3 is fixed in position, only the airtight pressure joint 2 moves in the process of crimping the airtight pressure joint 2 on the sample tube 1, so that winding or knotting caused by movement of the equipment extension gas circuit 311 is avoided, the length of the equipment extension gas circuit 311 can be shortened as much as possible, the residual gas volume in the equipment extension gas circuit 311 is reduced, and the accuracy of an experimental result is improved.

In some embodiments of the present utility model, as shown in fig. 3-7, the self-locking air circuit connector 3 further includes a telescoping nipple 32. Wherein, flexible takeover 32 locates in the joint body 31 and towards airtight pressure joint 2 setting, flexible takeover 32 has the elasticity towards the outside motion of joint body 31, and flexible takeover 32's external diameter is greater than the bore of gas circuit connector 2113, and equipment extension gas circuit 311 has first gas inlet 3111, and flexible takeover 32 has second gas inlet 321.

As shown in fig. 4 and 6, when the extension adapter 32 naturally extends, the first air port 3111 and the second air port 321 are offset from each other, and at this time, the airtight compression joint 2 is not in the compression joint position with the sample tube 1, and there is no communication between the extension adapter 32 and the device extension air path 311, that is, there is no communication between the air path connection port 2113 and the device extension air path 311.

As shown in fig. 5 and 7, when the airtight compression joint 2 is in the compression joint position with the sample tube 1, the air passage connection side wall 211 is engaged with the joint body 31 and presses the extension adapter 32 into the joint body 31, the first air port 3111 and the second air port 321 are communicated with each other, and at this time, the extension adapter 32 and the device extension air passage 311 are communicated, so that the air passage connection port 2113 is communicated with the device extension air passage 311 when the airtight compression joint 2 is in the compression joint position with the sample tube 1. Specifically, the gas output by the gas path of the sample analysis device enters the sample tube 1 through the device extension gas path 311, the first gas receiving port 3111, the second gas receiving port 321, the telescopic connection tube 32 and the gas path connection port 2113, or the gas in the sample tube 1 is discharged to the gas path of the sample analysis device through the gas path connection port 2113, the telescopic connection tube 32, the second gas receiving port 321, the first gas receiving port 3111 and the device extension gas path 311, so that the gas path between the sample analysis device and the sample tube 1 is communicated.

After the experiment is finished, the airtight compression joint 2 moves towards the direction away from the sample tube 1, at this time, the telescopic connecting tube 32 stretches out from the joint body 31, and the first air receiving port 3111 and the second air receiving port 321 are staggered with each other, so that the equipment extension air path 311 is closed, and the communication between the sample analysis equipment and the sample tube 1 is interrupted.

Thereby, the automatic gas on-off of the sample tube crimping automatic gas on-off system 100 is realized.

Simultaneously, through the bore that flexible takeover 32 external diameter is greater than gas circuit connector 2113, can avoid flexible takeover 32 to stretch into in gas circuit connector 2113 when airtight crimping head 2 is in the crimping position with sample cell 1, and then receive flexible takeover 32's hindrance when airtight crimping head 2 moves towards keeping away from sample cell 1 direction after avoiding the experiment to end, and then avoid flexible takeover 32 or airtight crimping head 2 to damage, guarantee the reliability of the automatic break-make gas circuit system 100 of sample cell crimping.

It should be noted that, the specific structure of the self-locking air passage connector 3 may be flexibly set according to practical situations, for example, the self-locking air passage connector 3 may also be provided with an electric control valve or an infrared switch, and when the airtight pressure connector 2 is at the pressure connection position with the sample tube 1, the air passage connector 2113 is controlled to be communicated with the device extension air passage 311 through the electric control valve or the infrared switch, so as to realize automatic ventilation and air interruption of the automatic on-off air passage system 100 for pressure connection of the sample tube.

In some embodiments of the present utility model, as shown in fig. 3-7, the connector body 31 has a blind adapter hole 312 therein for placing the telescopic adapter tube 32, the blind adapter tube hole 312 extends along a second direction, the second direction is perpendicular to the first direction, and a first elastic member 33 is disposed between the telescopic adapter tube 32 and the blind end of the blind adapter tube hole 312. The telescopic connecting tube 32 can be made to have elasticity moving towards the outside of the connector body 31, and the arrangement of the first elastic piece 33 further ensures the automatic gas on-off of the sample tube crimping automatic gas on-off system 100.

Specifically, in the process that the airtight compression joint 2 is in compression joint with the sample tube 1, the airtight compression joint 2 gradually approaches to the self-locking gas circuit joint 3 and extrudes the telescopic connecting tube 32 to extend out of one end of the self-locking gas circuit joint 3, so that the telescopic connecting tube 32 moves towards the first elastic piece 33 in the connecting tube blind hole 312 and extrudes the first elastic piece 33, when the airtight compression joint 2 is in compression joint position with the sample tube 1, the joint body 31 is attached to the gas circuit connecting side wall 211, the gas circuit connecting port 2113 is opposite to and communicated with the telescopic connecting tube 32, and the first gas receiving port 3111 and the second gas receiving port 321 are communicated with each other, thereby realizing the communication of the gas circuit connecting port 2113 and the equipment extension gas circuit 311, and further realizing the communication of the gas circuit between the sample analysis equipment and the sample tube 1.

After the experiment is finished, the airtight compression joint 2 moves towards the direction away from the sample tube 1, and the first elastic piece 33 contracts to generate elastic force towards the airtight compression joint 2, so that the telescopic connection tube 32 is pushed to move towards the airtight compression joint 2 in the connection tube blind hole 312 to enable the telescopic connection tube 32 to extend, the telescopic connection tube 32 is in a natural extending state, and the first air receiving port 3111 and the second air receiving port 321 are staggered with each other, so that communication between the sample analysis equipment and the sample tube 1 is interrupted.

In some embodiments of the present utility model, as shown in FIG. 3, the end of the extension nipple 32 adjacent the blind end of the nipple blind bore 312 is a closed end. By this arrangement, the first elastic element 33 can be prevented from falling out of the socket blind hole 312, so that the reliability of the movement of the telescopic socket 32 in the socket blind hole 312 is ensured.

In some embodiments of the present utility model, as shown in fig. 3 and 7, a first air receiving port 3111 is provided on a side wall of the blind nipple hole 312, and a second air receiving port 321 is provided on a peripheral wall of the extension nipple 32. It will be appreciated that when the airtight compression joint 2 is in the compression joint position with the sample tube 1, the telescopic connection tube 32 is pressed into the joint body 31, the first air receiving port 3111 arranged on the side wall of the connection tube blind hole 312 and the second air receiving port 321 arranged on the peripheral wall of the telescopic connection tube 32 are opposite and mutually communicated, so that communication between the telescopic connection tube 32 and the equipment extension air passage 311 is realized, and further communication between the air passage connection port 2113 and the equipment extension air passage 311 is realized.

In some embodiments of the present utility model, as shown in fig. 3, the connector body 31 has a process hole 313, the process hole 313 penetrates through the device extension gas path 311 and the connection pipe blind hole 312, one end of the process hole 313, which is communicated with the external environment, is provided with an airtight bolt 314, and a portion of the process hole 313, which is communicated with the device extension gas path 311 and the connection pipe blind hole 312, is a first gas receiving port 3111. It can be appreciated that the arrangement of the process hole 313 facilitates the processing of the internal structure of the joint body 31, particularly the processing of the first air receiving port 3111 and the second air receiving port 321, thereby reducing the processing difficulty and improving the efficiency. Meanwhile, the airtight bolts 314 are used for plugging the process holes 313 to ensure the tightness of the self-locking gas circuit connector 3, so that the tightness of the sample tube crimping automatic on-off gas circuit system 100 is ensured.

In some embodiments of the present utility model, as shown in fig. 3, a telescopic limit groove 3121 is provided on a sidewall of the adapter blind hole 312, a telescopic limit protrusion 322 is provided on an outer sidewall of the telescopic adapter 32, and the telescopic limit protrusion 322 is movably disposed in the telescopic limit groove 3121. The movement stroke of the telescopic adapter tube 32 in the adapter tube blind hole 312 is further limited by the cooperation of the telescopic limit groove 3121 and the telescopic limit protrusion 322, so that the first air receiving port 3111 and the second air receiving port 321 are further ensured to be communicated with each other when the airtight compression joint 2 is in the compression joint position with the sample tube 1.

In some embodiments of the present utility model, as shown in fig. 3, the telescopic limit groove 3121 is in a ring shape extending along the circumferential direction of the blind hole and is located at the open end of the blind hole 312, the outer side of the telescopic limit groove 3121 is open, the telescopic limit protrusion 322 is a nut in threaded engagement with the telescopic adapter 32, the telescopic limit groove 3121 is provided with a limit spiral ring 34, the limit spiral ring 34 is spaced from the inner end of the telescopic limit groove 3121, and the outer peripheral wall of the limit spiral ring 34 is in threaded engagement with the bottom wall of the telescopic limit groove 3121.

It can be appreciated that the setting of the limiting spiral ring 34 further limits the movement travel of the telescopic connection pipe 32 in the connection pipe blind hole 312, so that the telescopic connection pipe 32 is prevented from falling from the connection pipe blind hole 312 in the process of moving towards the airtight compression joint 2 in the connection pipe blind hole 312 by the elastic force of the first elastic piece 33, and the movement reliability of the telescopic connection pipe 32 is ensured. Meanwhile, the thread fit of the limiting spiral ring 34 and the telescopic limiting groove 3121, and the thread fit of the telescopic limiting protrusion 322 and the telescopic connecting pipe 32 can change the length of the telescopic connecting pipe 32 extending out of the joint body 31, so that the sample pipe crimping automatic on-off gas circuit system 100 is convenient to adjust, the universality of the self-locking gas circuit joint 3 is improved, and the telescopic limiting groove 3121 is convenient to process. In addition, the telescopic limiting groove 3121 extends into a circular shape along the circumferential direction of the blind hole, so that when the telescopic connecting tube 32 moves, the telescopic limiting protrusion 322 moves more smoothly in the telescopic limiting groove 3121, and the reliability is further improved.

In some embodiments of the present utility model, as shown in fig. 3, 6 and 7, the air path connection sidewall 211 includes a conforming section 2111 and a driving section 2112. Wherein, the air channel connection port 2113 is arranged at the attaching section 2111, and the attaching section 2111 is suitable for attaching with the joint body 31; the driving section 2112 is provided on one side of the fitting section 2111 close to the sample tube 1, the driving section 2112 is inclined in a direction away from the joint body 31 in a direction toward the sample tube 1, an outer peripheral wall of an outer end of the extension adapter tube 32 has a guide slope 323 fitted with the driving section 2112, the guide slope 323 extends in a circumferential direction of the extension adapter tube 32, and a distance between the guide slope 323 and a center of the extension adapter tube 32 gradually increases in a direction from the outer end to the inner end of the extension adapter tube 32.

It will be appreciated that during crimping of sample tube 1 by air-tight crimping head 2, air-tight crimping head 2 moves toward sample tube 1, and drive section 2112 of air-path connecting sidewall 211 presses guide ramp 323 of extension nipple 32, so that extension nipple 32 is pressed into nipple blind hole 312, so that fitting section 2111 is fitted with fitting body 31, and air-path connection port 2113 communicates with device extension air-path 311 when air-tight crimping head 2 is in a crimped position with sample tube 1. Meanwhile, by the fact that the driving section 2112 is inclined in the direction away from the joint body 31 in the direction towards the sample tube 1, and the distance between the guide inclined plane 323 and the center of the telescopic connecting tube 32 in the direction from the outer end to the inner end of the telescopic connecting tube 32 is gradually increased, the driving section 2112 can be further ensured to press the guide inclined plane 323 to enable the telescopic connecting tube 32 to be pressed into the connecting tube blind hole 312, and the reliability of the sample tube crimping automatic on-off gas circuit system 100 is improved.

In some embodiments of the present utility model, as shown in fig. 4, 5 and 7, the airtight compression joint 2 includes a joint rigid skeleton 21 and an elastic airtight plug 22, wherein an airtight plug mounting column 212, an insertion hole 213 and an airtight channel 214 communicated with the insertion hole 213 are further provided on the joint rigid skeleton 21, the airtight channel 214 is communicated with an airtight plug connection port 2113, and the elastic airtight plug 22 is sleeved outside the airtight plug mounting column 212 for compressing the sample tube 1.

It will be appreciated that the insertion hole 213 communicates with the sample tube 1, and that the elastic airtight plug 22 gradually enters the opening 121 of the sample tube 1 until the elastic airtight plug 22 closely contacts the inner wall of the sample tube 1 in the process that the airtight compressing head 2 moves toward the opening 121 in the first direction to compress the airtight compressing head 2 against the sample tube 1, so as to ensure high air tightness of the sample tube 1. When the airtight compression joint 2 is in a compression joint position with the sample tube 1, gas output by a gas channel of the sample analysis device enters the sample tube 1 through the device extension gas channel 311, the gas channel connection port 2113, the gas channel 214 and the jack 213, or the gas in the sample tube 1 is discharged to the gas channel of the sample analysis device through the jack 213, the gas channel 214, the gas channel connection port 2113 and the device extension gas channel 311.

In some embodiments of the present utility model, as shown in fig. 4 and 7, the number of the jacks 213 is two, the number of the air channel channels 214 is two corresponding to the two jacks 213, the number of the air channel connectors 2113 is two corresponding to the two air channel channels 214, and the number of the self-locking air channel connectors 3 is two corresponding to the two air channel connectors 2113. Through the arrangement, the gas output by the gas circuit of the sample analysis equipment and input into the sample tube 1 and the gas output by the gas circuit of the sample analysis equipment are not interfered with each other, and the accuracy of experimental results is further ensured.

For example, in one embodiment of the present application, the two insertion holes 213 are a first insertion hole 2131 and a second insertion hole 2132, respectively, the airtight pressure connector 2 includes an air pipe 23 and an air exhaust pipe 24, the air pipe 23 is inserted into the first insertion hole 2131, the air exhaust pipe 24 is inserted into the second insertion hole 2132, the air pipe 23 and the air exhaust pipe 24 are communicated with the inside of the sample pipe 1, the two air channels 214 are an air channel 2141 corresponding to the first insertion hole 2131 and an air exhaust channel 2142 corresponding to the second insertion hole 2132, the two self-locking air connectors 3 are respectively communicated with an air channel and an air exhaust channel of the sample analysis device, the air channel 2141 is communicated with the self-locking air connector 3 communicated with the air channel of the sample analysis device through one air channel connection port 2113, and the air exhaust channel 2142 is communicated with the self-locking air connector 3 communicated with the air exhaust channel of the sample analysis device through the other air channel connection port 2113.

When the airtight pressure joint 2 is in a pressure joint position with the sample tube 1, gas output by a gas channel of the sample analysis device is conveyed to the self-locking gas channel joint 3 communicated with the gas channel and is input into the sample tube 1 through the gas channel 2141 and the gas pipe 23, and gas exhausted from the sample tube 1 is exhausted to the sample analysis device through the exhaust pipe 24, the exhaust channel 2142 and the self-locking gas channel joint 3 communicated with the exhaust channel of the sample analysis device. The first jack 2131 and the second jack 2132 are arranged on the joint rigid skeleton 21, so that the installation of the air pipe 23 and the exhaust pipe 24 is facilitated, the installation efficiency is improved, and the disassembly and the maintenance of the air pipe 23 and the exhaust pipe 24 are facilitated.

It should be noted that, when the number of the self-locking air circuit connectors 3 is two, since the airtight pressure connector 2 is movable along the first direction and is used for being in pressure connection with the sample tube 1, the airtight pressure connector 2 is provided with an air circuit connection side wall 211, the air circuit connection side wall 211 is provided with an air circuit connection port 2113, the connector body 31 is internally provided with a connecting pipe blind hole 312 for placing the telescopic connecting pipe 32, the connecting pipe blind hole 312 extends along the second direction, the second direction is perpendicular to the first direction, the second direction does not refer to a certain direction in the space, any direction perpendicular to the first direction can be the second direction, the two self-locking air circuit connectors 3 can be arranged along the second direction, or the two self-locking air circuit connectors 3 can be arranged in a staggered manner.

In some embodiments of the present utility model, as shown in fig. 1 and fig. 4-7, the sample tube crimping automatic on-off gas circuit system 100 further includes a rack 4, wherein the sample tube 1 has an opening 121, a positioning groove 122 recessed toward the inner side of the sample tube 1 is provided on the outer peripheral wall of the sample tube 1, and the rack 4 includes an elastic telescopic clamping portion 41 matched with the positioning groove 122.

It can be appreciated that the sample tube 1 is used for holding a sample to be tested, in the process that the airtight compression joint 2 is located at the compression joint position with the sample tube 1, firstly, the sample tube 1 is placed on the placement frame 4, so as to realize automatic positioning of the sample tube 1, specifically, in the process that the sample tube 1 is placed on the placement frame 4, the elastic telescopic clamping portion 41 is extruded through the positioning groove 122 of the connecting portion 12, so that the elastic telescopic clamping portion 41 is compressed to enable the positioning groove 122 to be clamped with the elastic telescopic clamping portion 41, as the elastic telescopic clamping portion 41 is compressed to generate elastic force towards the sample tube 1, the positioning groove 122 is clamped with the elastic telescopic clamping portion 41 more firmly, and the setting of the positioning groove 122 enhances the firmness of clamping, so that the sample tube 1 is supported and automatically positioned through the elastic telescopic clamping portion 41, the sample tube 1 is convenient to be placed on the placement frame 4, the assembly efficiency is improved, and the reliability of the placement process of the sample tube 1 is ensured. In addition, in the process of placing the sample tube 1, the elastic telescopic clamping part 41 plays a certain buffering role on the sample tube 1, so that the sample tube 1 is prevented from being damaged, and the reliability of the automatic on-off gas circuit system 100 for crimping the sample tube is improved.

Then, the sample tube 1 is crimped through the airtight crimping head 2 so as to ensure the air tightness of the sample tube 1, and when the airtight crimping head 2 is positioned at the crimping position with the sample tube 1, the gas circuit communication is realized between the sample analysis equipment and the sample tube 1, so that the automatic crimping of the sample analysis equipment to the sample tube 1 is realized, and the crimping efficiency is improved.

In some embodiments of the present utility model, as shown in FIG. 7, a stud 2121 is provided on the outer peripheral wall of the airtight plug mounting column 212, and a slip-resistant groove 221 is provided on the inner peripheral wall of the elastic airtight plug 22 to be engaged with the stud 2121. The airtight plug mounting column 212 and the elastic airtight plug 22 are reliably connected through the cooperation of the anti-slip protrusion 2121 and the anti-slip groove 221, so that the elastic airtight plug 22 is effectively prevented from falling off, and meanwhile, the cooperation of the anti-slip protrusion 2121 and the anti-slip groove 221 prevents gas from leaking out of a gap between the elastic airtight plug 22 and the airtight plug mounting column 212, and high tightness of the sample tube 1 is further guaranteed.

Further, as shown in fig. 7, the protrusions 2121 are formed in a ring shape extending in the circumferential direction of the airtight plug mounting column 212, and the protrusions 2121 are a plurality of spaced apart in the axial direction of the mounting column, and the grooves 221 are a plurality of protrusions 2121 in a ring shape extending in the circumferential direction of the elastic airtight plug 22 in one-to-one correspondence. By the arrangement, the connection reliability between the airtight plug mounting column 212 and the elastic airtight plug 22 is further improved, gas is further prevented from leaking out of a gap between the elastic airtight plug 22 and the airtight plug mounting column 212, and the reliability of the sample tube crimping automatic on-off gas path system 100 is further improved.

In some embodiments of the present utility model, as shown in fig. 4, 5 and 7, the airtight compression joint 2 further includes a gas pipe 23 and a gas exhaust pipe 24, one end of the gas pipe 23 and one end of the gas exhaust pipe 24 are inserted into the joint rigid skeleton 21, and the gas pipe 23 and the gas exhaust pipe 24 are communicated with the inside of the sample tube 1 through the elastic airtight plug 22.

It can be understood that, in the process that the compression transmission rod 25 drives the airtight compression joint 2 to move towards the opening 121 of the sample tube 1, the gas pipe 23 and the gas pipe 24 extend into the sample tube 1 and are communicated with the interior of the sample tube 1, when the airtight compression joint 2 is in the compression joint position with the sample tube 1, the self-locking gas circuit joint 3 is attached to the gas circuit connection side wall 211 and the gas circuit connection port 2113 is communicated with the equipment extension gas circuit 311, so that the gas output by the gas circuit of the sample analysis equipment enters the sample tube 1 through the equipment extension gas circuit 311, the gas circuit connection port 2113 and the gas pipe 23, or the gas in the sample tube 1 is discharged to the gas circuit of the sample analysis equipment through the gas pipe 24, the gas circuit connection port 2113 and the equipment extension gas circuit 311. Meanwhile, the air tightness of the sample tube 1 through the elastic airtight plug 22 ensures that the gas quantity input by the gas transmission tube 23 and the gas quantity discharged by the exhaust tube 24 are accurate, thereby ensuring the accuracy of the detection structure of the sample analysis instrument applying the sample tube crimping automatic on-off gas circuit system 100.

Further, as shown in fig. 7, the number of the air channel connectors 2113 is two, and the air channel connectors 2113 are respectively communicated with the air channel 2141 and the air channel 2142, and the number of the self-locking air channel connectors 3 is two corresponding to the two air channel connectors 2113. It can be appreciated that the gas delivery channel 2141 communicates with the self-locking gas path connector 3 in communication with the gas delivery path of the sample analysis device through one of the gas path connection ports 2113, and the gas discharge channel 2142 communicates with the self-locking gas path connector 3 in communication with the gas discharge path of the sample analysis device through the other gas path connection port 2113. Specifically, when the airtight compression joint 2 is in the compression joint position with the sample tube 1, the gas output by the gas channel of the sample analysis device is conveyed to the self-locking gas channel joint 3 communicated with the gas channel through the gas conveying channel, and is input into the sample tube 1 through the gas conveying channel 2141 and the gas conveying tube 23, and the gas discharged from the sample tube 1 is discharged to the sample analysis device through the exhaust pipe 24, the exhaust channel 2142 and the self-locking gas channel joint 3 communicated with the exhaust channel of the sample analysis device. Through the arrangement, the gas output by the gas circuit of the sample analysis equipment and input into the sample tube 1 and the gas output by the gas circuit of the sample analysis equipment are not interfered with each other, and the accuracy of experimental results is further ensured.

In some embodiments of the present utility model, as shown in fig. 1 and 7, the cross-sectional area of the opening 121 is gradually increased in a direction toward the outside of the opening 121, the elastic airtight plug 22 is located in a frustum shape in which the opening 121 is fitted, the inner peripheral wall of the sample tube 1 has a positioning protrusion 124 corresponding to the positioning groove 122, the positioning protrusion 124 is provided on a side of the opening 121 near the closed end of the sample tube 1, and the elastic airtight plug 22 is adapted to be stopped against the positioning protrusion 124.

It can be appreciated that the arrangement of the gradually increased cross-sectional area of the opening 121 makes the problem that the elastic airtight plug 22 cannot be aligned with the opening 121 of the sample tube 1 due to slight deviation in the airtight compression process of the sample tube 1, so that the high air tightness of the sample tube 1 is ensured, the fault tolerance is increased, the universality of the airtight compression joint 2 is improved, and the airtight compression joint 2 is adapted to sample tubes 1 with different specifications. In addition, the elastic airtight plug 22 is tightly attached to the inner wall of the sample tube 1 by matching the frustum-shaped elastic airtight plug 22 with the opening 121 with the gradually increased cross-sectional area, so that the high air tightness of the sample tube 1 is further ensured.

Simultaneously, the crimping transmission rod 25 drives the elastic airtight plug 22 to enter the opening 121 and stop with the positioning protrusion 124, and the elastic airtight plug 22 is extruded by the positioning protrusion 124, so that the elastic airtight plug deforms towards one side of the positioning protrusion 124, thereby further filling the gap between the elastic airtight plug 22 and the sample tube 1 and further ensuring the high air tightness of the sample tube 1. And the positioning protrusion 124 can also limit the displacement of the elastic airtight plug 22 in the opening 121, so as to improve the reliability of the automatic on-off gas circuit system 100 for crimping the sample tube.

In some embodiments of the present utility model, the sample tube crimping automatic on-off gas circuit system 100 further comprises a pressure sensor. The pressure sensor is used for detecting the pressure force of the airtight pressure connector 2 to the sample tube 1. It can be understood that, because the cross-sectional areas of the openings 121 of the sample tubes 1 with different specifications are different, in the airtight compression process of the sample tubes 1, the compression transmission rod 25 drives the elastic airtight plug 22 to move towards the opening 121 of the sample tube 1, the compression force of the airtight compression joint 2 to the sample tube 1 is detected by the pressure sensor, and when the pressure value reaches the threshold value, the compression transmission rod 25 is controlled to stop driving, so that the elastic airtight plug 22 is tightly attached to the inner wall of the sample tube 1, and the stroke end of the elastic airtight plug 22 in the airtight compression process is judged according to the pressure value detected by the pressure sensor, so that the damage of the sample tube 1 due to overlarge compression force is avoided while the high air tightness of the sample tube 1 is ensured, and the universality of the automatic on-off air path system 100 for the compression of the sample tube is improved.

Further, a pressure sensor may be provided on the crimp transmission rod 25 or the joint rigid skeleton 21 to ensure that the pressure sensor can detect the crimping force of the airtight crimp 2 to the sample tube 1.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the elastic telescopic clamping portion 41 includes a clamping portion bracket 411, a clamping post 412, a clamping nut 413, a positioning clamping joint 414, and a second elastic member 415. The clamping portion bracket 411 has a placement hole 4111 for placing the sample tube 1, a through hole 4112 penetrating through the peripheral wall of the placement hole 4111 is formed in the peripheral wall of the placement hole 4111, the clamping post 412 is movably arranged in the through hole 4112 in a penetrating manner, two ends of the clamping post 412 in the length direction are located outside the through hole 4112, the clamping nut 413 is connected to one end of the clamping post 412 far away from the placement hole 4111 and used for limiting the clamping post 412 to move towards the placement hole 4111, the positioning clamping connector 414 is connected to one end of the clamping post 412 located in the placement hole 4111 and used for being matched with the positioning groove 122, and the second elastic piece 415 is used for driving the positioning clamping connector 414 to move towards the center of the placement hole 4111.

It can be appreciated that, in the process of the sample tube 1 entering the placement hole 4111, the positioning groove 122 abuts against the positioning clamp connector 414, and the positioning groove 122 presses the positioning clamp connector 414 against the elastic force of the second elastic member 415 to push the clamping post 412 to move towards a direction away from the placement hole 4111, so as to realize the clamping of the positioning groove 122 and the elastic telescopic clamping portion 41. When the clamping post 412 moves in a direction away from the placement hole 4111, the second elastic member 415 elastically deforms, so that the second elastic member 415 generates an elastic force toward the center of the placement hole 4111, and the positioning clamping connector 414 is firmly fixed in the positioning groove 122, so that the positioning groove 122 and the positioning clamping connector 414 are more firmly clamped, and the sample tube 1 is ensured to be positioned at the center of the placement hole 4111. Meanwhile, the clamping columns 412 in the placing holes 4111 are limited through the clamping nuts 413, the second elastic pieces 415 and the positioning clamping connectors 414, so that the clamping columns 412 are prevented from falling from the through holes 4112, and the reliability of the automatic on-off gas circuit system 100 for crimping the sample tubes is improved. Optionally, the detent tabs 414 and the detent posts 412 are one piece.

Further, as shown in fig. 1 and 2, the radial cross section of the positioning groove 122 is circular arc, and the positioning clip 414 is spherical matching the radial cross section of the positioning groove 122. Through such arrangement, the friction and collision between the positioning groove 122 and the positioning clamp connector 414 are reduced in the process of placing the sample tube 1 on the placing frame 4, and the stability and reliability of placing the sample tube 1 are further ensured.

Still further, the positioning groove 122 extends in the circumferential direction of the connecting portion 12 in a ring shape or in a plurality of spaced apart in the circumferential direction of the connecting portion 12. For example, in the example shown in fig. 1, the positioning groove 122 extends in the circumferential direction of the connecting portion 12 to be annular, the support and automatic positioning of the sample tube 1 are achieved through the cooperation of such annular positioning groove 122 and the elastic telescopic clamping portion 41, and the arrangement of the annular positioning groove 122 makes the process of placing the sample tube 1 on the placement frame 4 not limited by an angle, so that the sample tube 1 is further convenient to place on the placement frame 4.

Of course, the present utility model is not limited thereto, and the positioning grooves 122 may be a plurality of positioning grooves spaced apart along the circumferential direction of the connecting portion 12, and when the number of positioning snap joints 414 is a plurality of positioning snap joints 414, the number of positioning snap joints 414 corresponds to the number of positioning grooves 122 one by one, and the positioning snap joints 414 are defined in the corresponding positioning grooves 122, so that the sample tube 1 can be limited to rotate along the circumferential direction, and the fixing reliability of the sample tube 1 is ensured.

In some embodiments of the present utility model, as shown in fig. 2, the second elastic member 415 is sleeved on the clamping post 412 and is located between the positioning clamping connector 414 and the clamping portion bracket 411. Therefore, the second elastic member 415 is convenient to set and fix, and the second elastic member 415 is elastically deformed when the clamping post 412 moves towards the direction away from the placement hole 4111, so that the second elastic member 415 generates an elastic force towards the center of the placement hole 4111, and the positioning clamping connector 414 is firmly fixed in the positioning groove 122, so that the positioning groove 122 and the positioning clamping connector 414 are firmly clamped, and the reliability of the elastic telescopic clamping portion 41 is improved.

In some embodiments of the present utility model, as shown in fig. 2, the through holes 4112 are a plurality of through holes 4111 spaced apart along the circumferential direction of the placement hole 4111, each through hole 4112 extends along the radial direction of the sample tube 1, one clamping post 412 is disposed in each through hole 4112, and two ends of each clamping post 412 are respectively connected to a clamping nut 413 and a positioning clamping connector 414. Correspondingly, the second elastic members 415 are a plurality of corresponding to the clamping columns 412 one by one, and each second elastic member 415 is arranged between the corresponding positioning clamping connector 414 and the corresponding clamping portion bracket 411 and sleeved on the corresponding clamping column 412. By such arrangement, the reliability of automatic positioning of the elastic expansion joint portion 41 is further ensured.

It can be appreciated that the cooperation of the positioning clamping connectors 414 and the positioning grooves 122 further avoids the separation of the positioning clamping connectors 414 and the positioning grooves 122, so as to ensure the supporting and positioning effects of the elastic telescopic clamping portion 41 on the sample tube 1, and improve the reliability of the automatic on-off gas circuit system 100 for crimping the sample tube.

It should be noted that four through holes 4112 are shown in fig. 2 for illustration purposes, but it is obvious to one skilled in the art that the present utility model can be applied to two, three or more through holes 4112 after reading the following technical solutions, which falls within the scope of the present utility model.

In some embodiments of the present utility model, as shown in fig. 2, the placement hole 4111 has a placement notch 4113, and the placement notch 4113 is disposed between two adjacent through holes 4112. It will be appreciated that, during the process of placing the sample tube 1 in the placement frame 4, the sample tube 1 enters the placement hole 4111 along the radial direction of the placement hole 4111 through the placement notch 4113, so that the placement of the sample tube 1 is facilitated, and the movement of the sample tube 1 to one axial side of the placement hole 4111 and the placement of the sample tube 1 into the placement hole 4111 along the axial direction of the placement hole 4111 are avoided. In addition, the placement notch 4113 is disposed between two adjacent through holes 4112, so that the positioning and supporting effects on the sample tube 1 can be reduced due to the reduced number of through holes 4112 caused by the placement of the placement notch 4113.

In some embodiments of the present utility model, as shown in fig. 1, the sample tube 1 includes a body portion 11 and a connecting portion 12 connected in the axial direction of the sample tube 1, and an opening 121 and a positioning groove 122 are provided in the connecting portion 12. It will be appreciated that the body portion 11 of the sample tube 1 is configured to hold a sample to be tested, the opening 121 of the connecting portion 12 is configured to cooperate with the air-tight press-fitting 2 to seal the sample tube 1, and the positioning groove 122 of the connecting portion 12 is configured to cooperate with the placement frame 4 to automatically position the sample tube 1.

In some embodiments of the present utility model, as shown in fig. 1, 2 and 7, the outer peripheral wall of the connection part 12 is provided with a supporting protrusion 123, and the rack 4 further includes a supporting part 42. Wherein the support portion 42 is held against the lower surface of the support protrusion 123 for supporting the sample tube 1. The lower surface (up-down direction is the first direction in fig. 4) of the supporting protrusion 123 and the supporting portion 42 stop against to further support the sample tube 1 on the rack 4, so that the reliability of fixing the sample tube 1 is ensured.

In some embodiments of the present utility model, the support protrusions 123 extend in the circumferential direction of the connection portion 12 in a ring shape or the support protrusions 123 are a plurality of spaced apart in the circumferential direction of the connection portion 12; and/or the support portion 42 includes one support block and the support portion 42 formed in an open ring shape includes a plurality of support blocks spaced apart in the circumferential direction of the connection portion 12.

It will be appreciated that the support protrusion 123 extends in a ring shape along the circumferential direction of the connection portion 12, the support portion 42 includes one support block and is formed in an open ring shape, the sample tube 1 on the rack 4 is further supported by the cooperation of the lower surface of the annular support protrusion 123 and the annular support block, and the arrangement is such that the process of placing the sample tube 1 on the rack 4 is not limited by an angle;

Or, the supporting protrusion 123 extends in a ring shape along the circumferential direction of the connection part 12, the supporting part 42 includes a plurality of supporting blocks spaced apart along the circumferential direction of the connection part 12, the sample tube 1 on the rack 4 is further supported by the cooperation of the lower surface of the ring-shaped supporting protrusion 123 and the plurality of supporting blocks, and such arrangement reduces the cost;

or, the supporting protrusions 123 are a plurality of spaced apart in the circumferential direction of the connection part 12, the supporting part 42 includes one supporting block and is formed in an open ring shape, the sample tube 1 on the rack 4 is further supported by the cooperation of the lower surfaces of the plurality of supporting protrusions 123 and the annular supporting block, and the arrangement is such that the process of placing the sample tube 1 on the rack 4 is not limited by an angle;

or, the supporting projections 123 are plural, which are spaced apart in the circumferential direction of the connecting portion 12, the supporting portion 42 includes plural supporting blocks which are spaced apart in the circumferential direction of the connecting portion 12, the sample tube 1 on the rack 4 is further supported by the cooperation of the lower surfaces of the plural supporting projections 123 and the plural supporting blocks, and such arrangement reduces the cost. Further, the number of the supporting protrusions 123 and the number of the supporting blocks are one-to-one.

In some embodiments of the present utility model, as shown in fig. 7, the plurality of support blocks includes a first support block 421 and a second support block 422 disposed opposite to each other, each of the surfaces of the first support block 421 and the second support block 422 facing each other is provided with a support step 4211, and a minimum distance between the support steps 4211 on the first support block 421 and the support steps 4211 on the second support block 422 is smaller than an outer diameter of the support protrusion 123 and equal to or larger than an inner diameter of the support protrusion 123. Through such setting, guarantee to have certain clearance between sample cell 1 and the supporting part 42 when guaranteeing to support the sample cell 1 that is located on rack 4, further avoid influencing the automatic positioning of elastic flexible joint portion 41 to sample cell 1.

In some embodiments of the utility model, the hardness of the connecting portion 12 is greater than the hardness of the body portion 11. It can be appreciated that when the sample tube 1 is applied to the sample analyzer for detection, the sample is located in the body portion 11, since the opening 121 on the connecting portion 12 is used to cooperate with the airtight pressure connector 2 to realize the sealing of the sample tube 1, the positioning groove 122 on the connecting portion 12 is used to cooperate with the placement frame 4 to realize the automatic positioning of the sample tube 1, by such arrangement, the reliability of the crimping process of the sample tube 1 is improved, the breakage of the sample tube 1 in the crimping process is avoided, and meanwhile, the hardness of the connecting portion 12 is greater than that of the body portion 11, so that the risk of breakage caused by the overlarge internal pressure of the sample tube 1 during the experiment can be reduced as much as possible, and the reliability of the sample tube 1 is improved.

In some embodiments of the present utility model, the connecting portion 12 is a metal piece and the body portion 11 is a glass piece. It can be understood that the glass material can reduce the deflation phenomenon as much as possible when the sample tube 1 is in the vacuum environment, so that the accurate experimental result can be obtained, the metal material can ensure the structural strength of the connecting part 12, and the reliability of the crimping process of the sample tube 1 is improved. The body 11 and the connecting portion 12 are connected by gluing or welding. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model.

In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. The utility model provides an automatic on-off gas circuit system of sample cell crimping which characterized in that includes:

the airtight pressure connector is movable along a first direction and used for being in pressure connection with the sample tube, and is provided with a gas path connecting side wall, and a gas path connecting port is formed in the gas path connecting side wall;

the self-locking gas circuit connector is fixed in position and comprises a connector body, and an equipment extension gas circuit communicated with a gas circuit of sample analysis equipment is arranged in the connector body;

when the airtight pressure connector is in a pressure connection position with the sample tube, the connector body is attached to the side wall of the air path connection, and the air path connection port is communicated with the equipment extension air path.

2. The sample tube crimping automatic on-off gas circuit system according to claim 1, wherein the self-locking gas circuit connector further comprises:

the telescopic connecting pipe is arranged in the connector body and faces the airtight pressure connector, the telescopic connecting pipe has elasticity moving towards the outside of the connector body, the outer diameter of the telescopic connecting pipe is larger than the caliber of the gas path connecting port, the equipment extension gas path is provided with a first gas port, and the telescopic connecting pipe is provided with a second gas port;

when the telescopic connecting pipe naturally stretches out, the first air receiving port and the second air receiving port are staggered;

when the airtight pressure connector is in a pressure connection position with the sample tube, the gas circuit connecting side wall is in fit with the connector body and presses the telescopic connecting tube into the connector body, the gas circuit connecting port is opposite to and communicated with the telescopic connecting tube, and the first gas connection port and the second gas connection port are mutually communicated.

3. The automatic on-off gas circuit system for crimping a sample tube according to claim 2, wherein the connector body is internally provided with a connecting tube blind hole for placing the telescopic connecting tube, the connecting tube blind hole extends along a second direction, the second direction is perpendicular to the first direction, and a first elastic piece is arranged between the telescopic connecting tube and the blind end of the connecting tube blind hole.

4. The automatic on-off gas path system for crimping a sample tube according to claim 3, wherein one end of the telescopic adapter tube, which is close to the blind end of the adapter tube blind hole, is a closed end.

5. The automatic on-off gas circuit system for crimping a sample tube according to claim 3, wherein the first gas receiving port is arranged on the side wall of the blind hole of the connecting tube, and the second gas receiving port is arranged on the peripheral wall of the telescopic connecting tube.

6. The automatic on-off gas circuit system for crimping a sample tube according to claim 5, wherein the connector body is provided with a process hole, the process hole penetrates through the equipment extension gas circuit and the connecting tube blind hole, one end of the process hole, which is communicated with the external environment, is provided with an airtight bolt, and the part, which is communicated with the equipment extension gas circuit and the connecting tube blind hole, of the process hole is the first gas port.

7. The automatic on-off gas circuit system for crimping of the sample tube according to claim 3, wherein a telescopic limit groove is formed in the side wall of the blind hole of the connecting tube, a telescopic limit protrusion is formed in the outer side wall of the telescopic connecting tube, and the telescopic limit protrusion is movably arranged in the telescopic limit groove.

8. The automatic on-off gas circuit system for crimping a sample tube according to claim 7, wherein the telescopic limit groove is in a ring shape extending along the circumferential direction of the blind hole and is positioned at the opening end of the blind hole of the connecting tube, the outer side of the telescopic limit groove is opened, the telescopic limit protrusion is a nut in threaded fit with the telescopic connecting tube, a limit spiral ring is arranged in the telescopic limit groove, the limit spiral ring is spaced from the inner end of the telescopic limit groove, and the peripheral wall of the limit spiral ring is in threaded fit with the bottom wall of the telescopic limit groove.

9. The automated sample tube crimping on-off gas circuit system of claim 2, wherein the gas circuit connecting sidewall comprises:

the air channel connecting port is arranged on the attaching section, and the attaching section is suitable for being attached to the joint body;

the drive section, the drive section is located laminating section be close to one side of sample tube, the drive section is towards in the orientation of sample tube the orientation is kept away from the direction slope of joint body, the outer peripheral wall of the outer end of flexible takeover have with drive section complex direction inclined plane, the direction inclined plane is followed the circumference direction of flexible takeover extends, and in the direction of the outer end of flexible takeover to the inner, the direction inclined plane with distance between the center of flexible takeover increases gradually.

10. The sample tube crimping automatic on-off gas circuit system according to claim 1, wherein the airtight crimp head comprises:

the connector rigid framework is provided with an airtight plug mounting column, an insertion hole and an air passage channel communicated with the insertion hole, and the air passage channel is communicated with the air passage connecting port;

The elastic airtight plug is sleeved outside the airtight plug mounting column and used for crimping the sample tube.

11. The automatic on-off gas circuit system for crimping of the sample tube according to claim 10, wherein the number of the jacks is two, the number of the gas circuit channels is two corresponding to the two jacks, the number of the gas circuit connectors is two corresponding to the two gas circuit channels, and the number of the self-locking gas circuit connectors is two corresponding to the two gas circuit connectors.

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