CN212008456U

CN212008456U - Rapid switching device for carrier gas of headspace sample injector

Info

Publication number: CN212008456U
Application number: CN202020583009.0U
Authority: CN
Inventors: 逄海舵; 王晓伟; 王文海
Original assignee: Shandong Yongtuo Occupational Environment Testing Co ltd
Current assignee: Shandong Yongtuo Occupational Environment Testing Co ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-11-24
Anticipated expiration: 2030-04-20

Abstract

The utility model relates to a carrier gas fast switching device, in particular to a headspace sample injector carrier gas fast switching device, which comprises a carrier gas box, wherein a first carrier gas cavity and a second carrier gas cavity are arranged inside the carrier gas box, an arc-shaped groove is arranged at the top of the carrier gas box, two symmetrical groups of fixed clamping grooves are arranged on the inner wall of the arc-shaped groove, a sealing ring is arranged at the bottom of the arc-shaped groove, a first carrier gas port and a second carrier gas port are arranged at the top of the arc-shaped groove, the first carrier gas port is communicated with the inside of the first carrier gas cavity, the second carrier gas port is communicated with the inside of the second carrier gas cavity, a handle is rotationally arranged at the top of the carrier gas box, a connecting cylinder is arranged at the position close to the end part of the handle, the connecting cylinder is arranged inside the sealing ring in a sliding manner, a symmetrical group of T-shaped clamping grooves are arranged at the, and the air leakage is not easy to happen at the interface.

Description

Rapid switching device for carrier gas of headspace sample injector

Technical Field

The utility model relates to a carrier gas fast switch over device, concretely relates to headspace sample injector carrier gas fast switch over device.

Background

A headspace sample injector is a convenient and fast sample pretreatment method in gas chromatography, and the principle of the headspace sample injector is that a sample to be detected is placed in a closed container, volatile components are volatilized from a sample matrix through heating, balance is achieved in a gas phase (or a gas phase) and a liquid phase (or a gas phase) and top gas is directly extracted for chromatographic analysis, so that the components and the content of the volatile components in the sample are detected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a headspace sample injector carrier gas fast switching control equipment to the switching carrier gas that proposes in solving above-mentioned background art need dismantle the pipeline port behind one's back repeatedly, extravagant plenty of time, and the serious problem of kneck wearing and tearing.

In order to achieve the above object, the utility model provides a following technical scheme:

a carrier gas fast switching device of a headspace sampler comprises a carrier gas box, wherein a first carrier gas cavity and a second carrier gas cavity are arranged in the carrier gas box, the top of the carrier gas box is provided with an arc-shaped groove, the inner wall of the arc-shaped groove is provided with two symmetrical groups of fixed clamping grooves, the bottom of the arc-shaped groove is provided with a sealing ring, the top of the arc-shaped groove is provided with a first air carrying port and a second air carrying port, the first gas carrying port is communicated with the inside of the first gas carrying cavity, the second gas carrying port is communicated with the inside of the second gas carrying cavity, the top of the carrier gas box is rotatably provided with a handle, the handle is communicated with a connecting cylinder at the position close to the end part, the connecting cylinder is arranged inside the sealing ring in a sliding manner, a group of symmetrical T-shaped clamping grooves are formed in the inner layer of the connecting cylinder, the inside card post that slides of T shape draw-in groove, the card post with fixed slot joint adaptation.

Preferably, the handle tip intercommunication is provided with the hose, be provided with the valve on the hose, the sealed headspace injector that is provided with of hose tip.

Preferably, the sealing ring is arc-shaped, and the inner wall of the sealing ring is tightly attached to the outer wall of the connecting cylinder.

Preferably, the handle top has been seted up the spout, the inside slip of spout is provided with a movable section of thick bamboo, movable bobbin base portion with be provided with a plurality of first springs between the spout inner chamber bottom.

Preferably, a set of symmetrical elastic buckles is arranged on the outer wall of the movable cylinder.

Preferably, the clamping column comprises a limiting plate, and a plurality of second springs are arranged between the left side of the limiting plate, which is close to the edge, and the left side of the inner cavity of the T-shaped clamping groove.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this quick auto-change over device of headspace sample injector carrier gas, through the twist grip, make activity bobbin base portion communicate with first carrier gas mouth and second carrier gas mouth respectively, conveniently switch over the inside carrier gas of first carrier gas chamber and second carrier gas chamber at any time, through pressing the activity bobbin, make the activity bobbin slide along the connecting cylinder inner wall lapse, the elasticity buckle extrusion is between activity bobbin and connecting cylinder inner wall, make the elasticity buckle slide to T shape draw-in groove, prevent that the kneck from rocking gas leakage, promote the card post horizontal slip in T shape draw-in groove under the effect of elasticity buckle elasticity, make card post tip stretch out T shape draw-in groove and fixed slot joint adaptation, it is fixed with first carrier gas mouth and second carrier gas mouth intercommunication respectively to make activity bobbin base portion, convenient fast switch over carrier gas.

2. This headspace sample injector carrier gas fast switching control device, through setting up the sealing washer wearability, the leakproofness is good, and the sealing washer is the same with connecting cylinder rotation radian profile, not only can guarantee that the connecting cylinder bottom is sealed, prevents that the sample gas in the headspace sample introduction from leaking gas, can also avoid the connecting cylinder at the arc wall sliding wear seriously.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the carrier gas tank of the present invention;

FIG. 3 is a partially exploded view of the handle structure of the present invention;

FIG. 4 is a partial side sectional view of the connector barrel structure of the present invention;

FIG. 5 is a top cross-sectional view of the carrier gas box structure of the present invention;

fig. 6 is a schematic structural diagram of the sealing ring of the present invention.

In the figure: 1. a gas-carrying tank; 11. an arc-shaped slot; 110. fixing the clamping groove; 12. a seal ring; 13. a first carrier port; 14. a second carrier gas port; 15. a rotating shaft; 16. a first air-carrying cavity; 17. a second air-carrying cavity; 2. a headspace sampler; 3. a hose; 30. a valve; 4. a handle; 40. a chute; 41. a connecting cylinder; 410. a T-shaped clamping groove; 42. a movable barrel; 420. a first spring; 421. elastic buckle; 43. clamping the column; 431. a limiting plate; 432. a second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "center line", "longitudinal", "lateral", "length", "width", "thickness", "depth", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be taken as limiting the invention, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example 1

A top air sample injector carrier gas fast switching device, in order to solve the problems that the pipeline port at the back of the instrument needs to be repeatedly disassembled for switching carrier gas, a large amount of time is wasted, and the abrasion at the interface is serious, as a preferred embodiment, as shown in figure 1, figure 2, figure 3, figure 4, figure 5 and figure 6, comprises a carrier gas box 1, a first carrier gas cavity 16 and a second carrier gas cavity 17 are arranged inside the carrier gas box 1, an arc-shaped groove 11 is arranged at the top of the carrier gas box 1, a first carrier gas port 13 and a second carrier gas port 14 are arranged at the top of the arc-shaped groove 11, the first carrier gas port 13 is communicated with the inside of the first carrier gas cavity 16, the second carrier gas port 14 is communicated with the inside of the second carrier gas cavity 17, a handle 4 is rotatably arranged at the top of the carrier gas box 1, a rotating shaft 15 is arranged at the position, a handle 4 is rotatably arranged at the top of the rotating shaft 15, the connecting cylinder 41 is driven to slide in the arc-shaped groove 11, so that the bottom opening of the connecting cylinder 41 is respectively communicated with the first air carrying port 13 and the second air carrying port 14, the carrier air in the first air carrying cavity 16 and the second air carrying cavity 17 is enabled to convey different carrier air from the connecting cylinder 41 to the handle 4 through the air pumps in the first air carrying cavity 16 and the second air carrying cavity 17, the pipeline port behind the instrument is avoided being repeated, and the time is saved.

Further, two sets of fixed slot 110 of symmetry are seted up to 11 inner walls of arc wall, a set of T shape draw-in groove 410 of symmetry is seted up to connecting cylinder 41 inlayer, the inside slip of T shape draw-in groove 410 is provided with card post 43, card post 43 rotates connecting cylinder 41 with fixed slot 110 joint adaptation, 41 bottom opening parts of connecting cylinder respectively with first carrier gas mouth 13 and second carrier gas mouth 14 intercommunication when aliging, card post 43 corresponds the joint with fixed slot 110, can fix connecting cylinder 41 respectively at first carrier gas mouth 13 and second carrier gas mouth 14, effectively prevent that connecting cylinder 41 from rocking gas leakage.

Specifically, spout 40 has been seted up at 4 tops of handle, the inside slip of spout 40 is provided with a movable section of thick bamboo 42, be provided with a plurality of first springs 420 between movable section of thick bamboo 42 bottom and the 40 inner chamber bottoms of spout, a movable section of thick bamboo 42 outer wall is provided with the elastic buckle 421 of a set of symmetry, when first spring 420 is the original state, the compression of elastic buckle 421 is at a movable section of thick bamboo 42 outer wall and a connecting cylinder 41 inner wall, press a movable section of thick bamboo 42, make a movable section of thick bamboo 42 slide in spout 40 is inside, make first spring 420 compress, the tip of elastic buckle 421 stretches into T shape draw-in groove 410, under the effect of elastic buckle 421 elasticity, elastic buckle 421 promotes card post 43 horizontal slip, make card post 43 stretch out T shape draw-in groove 410 joint inside fixed slot 110.

It should be noted that the latching post 43 includes a limiting plate 431, a plurality of second springs 432 are disposed between a left side of the limiting plate 431 close to the edge and a left side of an inner cavity of the T-shaped latching slot 410, the limiting plate 431 slides inside the T-shaped latching slot 410, when the latching post 43 extends out of the T-shaped latching slot 410, the second springs 432 are compressed, when the movable barrel 42 is pulled slightly, the elastic latch 421 moves upward, the elastic latch 421 is compressed between an outer wall of the movable barrel 42 and an inner wall of the connecting barrel 41, the movable barrel 42 is fixed inside the connecting barrel 41 under the action of the elastic force of the first springs 420, and under the action of the elastic force of the second springs 432, the latching post 43 slides into the T-shaped latching slot 410 from left to right, so that the latching post 43 is separated from the fixed latching slot 110, and.

Further, 11 bottoms in arc wall are provided with sealing washer 12, sealing washer 12 is the arc form, the arc form is the same with connecting cylinder 41 pivoted radian profile, connecting cylinder 41 slides and sets up inside sealing washer 12, the inseparable laminating of 12 inner walls of sealing washer and 41 outer walls of connecting cylinder, sealing washer 12 wearability, the leakproofness is good, connecting cylinder 41 bottom opening part is sealed when not only can guaranteeing to rotate, prevent the gaseous gas leakage of sample in headspace sample injector 2, can also avoid connecting cylinder 41 to slide wear seriously in arc wall 11.

In addition, the end part of the handle 4 is communicated with the hose 3, the hose 3 is provided with the valve 30, the end part of the hose 3 is hermetically provided with the headspace sample injector 2, the valve 30 is opened, and the carrier gas conveyed in the handle 4 is conveyed into the headspace sample injector 2 through the hose 3, so that the operation is convenient.

When the carrier gas fast switching device of the headspace sampler of the utility model is used, different carrier gases are respectively stored in the first carrier gas cavity 16 and the second carrier gas cavity 17, the handle 4 is rotated to drive the connecting cylinder 41 to slide in the arc-shaped groove 11, so that the bottom opening of the connecting cylinder 41 is respectively communicated with the first carrier gas port 13 and the second carrier gas port 14, the carrier gases in the first carrier gas cavity 16 and the second carrier gas cavity 17 are transmitted to the inside of the handle 4 from the connecting cylinder 41 through the air pumps in the first carrier gas cavity 16 and the second carrier gas cavity 17, the repeated use of the pipeline port at the back of the instrument is avoided, the time is saved, when the bottom opening of the connecting cylinder 41 is respectively communicated and aligned with the first carrier gas port 13 and the second carrier gas port 14, the movable cylinder 42 is pressed to slide in the chute 40, the first spring 420 is compressed, the end part 421 of the elastic buckle extends into the T-shaped clamping groove 410, under the effect of elasticity of elastic buckle 421, elastic buckle 421 promotes card post 43 horizontal slip, make card post 43 stretch out T shape draw-in groove 410 joint inside fixed slot 110, effectively prevent connecting cylinder 41 from rocking gas leakage, when pulling the movable cylinder 42 gently, make elastic buckle 421 shift up, elastic buckle 421 is compressed at movable cylinder 42 outer wall and connecting cylinder 41 inner wall, under the effect of first spring 420 elasticity, movable cylinder 42 is fixed inside connecting cylinder 41, under the effect of second spring 432 elasticity, make card post 43 slide in inside T shape draw-in groove 410 about the messenger, make card post 43 break away from with fixed slot 110, follow-up twist grip 4 switches different carrier gases.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a quick auto-change over device of headspace sample injector carrier gas, includes carrier gas case (1), its characterized in that: a first air carrying cavity (16) and a second air carrying cavity (17) are arranged in the air carrying box (1), an arc-shaped groove (11) is formed in the top of the air carrying box (1), two groups of symmetrical fixing clamping grooves (110) are formed in the inner wall of the arc-shaped groove (11), a sealing ring (12) is arranged at the bottom of the arc-shaped groove (11), a first air carrying port (13) and a second air carrying port (14) are formed in the top of the arc-shaped groove (11), the first air carrying port (13) is communicated with the inside of the first air carrying cavity (16), the second air carrying port (14) is communicated with the inside of the second air carrying cavity (17), a handle (4) is rotatably arranged at the top of the air carrying box (1), a connecting cylinder (41) is communicated and arranged at a position close to an end part of the handle (4), the connecting cylinder (41) is arranged in the sealing ring (12) in a sliding manner, and a group of symmetrical T-shaped clamping grooves (410, the T-shaped clamping groove (410) is internally provided with a clamping column (43) in a sliding mode, and the clamping column (43) is matched with the fixed clamping groove (110) in a clamping mode.

2. The headspace sampler carrier gas fast switching device of claim 1, wherein: the handle (4) tip intercommunication is provided with hose (3), be provided with valve (30) on hose (3), hose (3) tip seal is provided with headspace injector (2).

3. The headspace sampler carrier gas fast switching device of claim 1, wherein: the sealing ring (12) is arc-shaped, and the inner wall of the sealing ring (12) is tightly attached to the outer wall of the connecting cylinder (41).

4. The headspace sampler carrier gas fast switching device of claim 1, wherein: the handle (4) top has been seted up spout (40), spout (40) inside slip is provided with a movable section of thick bamboo (42), a plurality of first springs (420) are provided with between a movable section of thick bamboo (42) bottom and spout (40) inner chamber bottom, a movable section of thick bamboo (42) outer wall is provided with a set of symmetrical elasticity buckle (421).

5. The headspace sampler carrier gas fast switching device of claim 1, wherein: the gas-carrying box (1) is provided with a rotating shaft (15) near the center, and the top of the rotating shaft (15) is rotatably provided with the handle (4).

6. The headspace sampler carrier gas fast switching device of claim 1, wherein: the clamping column (43) comprises a limiting plate (431), and a plurality of second springs (432) are arranged between the left side of the limiting plate (431), close to the edge, and the left side of the inner cavity of the T-shaped clamping groove (410).