CN215727942U

CN215727942U - Automatic sample injector for gas chromatograph

Info

Publication number: CN215727942U
Application number: CN202122077172.7U
Authority: CN
Inventors: 曹敏; 袁家所
Original assignee: Hefei Senpu Scientific Instrument Co ltd
Current assignee: Hefei Senpu Scientific Instrument Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-02-01
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses an automatic sample injector for a gas chromatograph, which comprises a base, a placement ring arranged on the outer side of the upper end of the base, a rotating frame vertically and rotatably arranged in the middle of the upper end of the base, and a liquid taking needle movably arranged at the front end of the rotating frame through a first electric oil cylinder and a second electric oil cylinder, wherein a plurality of jacks are formed in the placement ring at equal angles, a plurality of chutes communicated with the jacks are formed in the placement ring at equal angles, magnetic suction blocks are connected to the inner sides of the chutes in a sliding manner, a core ring is arranged between the placement ring and the rotating frame on the upper end surface of the base, and an electromagnetic coil is wound on the outer side of the core ring. According to the utility model, the magnetic suction and pressing buckle type clamping structure is adopted, so that the reagent bottle inserted into the insertion hole of the object placing ring can be automatically clamped after being placed, the generation of impact bending and breaking phenomena in the liquid drawing process of the liquid taking needle is reduced, and the working stability of the gas chromatograph is improved.

Description

Automatic sample injector for gas chromatograph

Technical Field

The utility model relates to the technical field of gas chromatographs, in particular to an automatic sample injector for a gas chromatograph.

Background

The gas chromatograph is an instrument for qualitatively and quantitatively analyzing a multi-component complex mixture by using a chromatographic separation technology and a detection technology. The method can be used for analyzing heat-stable organic matters with the boiling point not more than 500 ℃ in soil, such as volatile organic matters, organic chlorine, organic phosphorus, polycyclic aromatic hydrocarbons, phthalate esters and the like.

However, the existing autosampler for gas chromatograph still has the disadvantages that: although most of the devices can realize fixed-point automatic liquid pumping and rotary liquid discharging operations of detection reagents, the clamping operation after the reagent bottles inserted into the object placing rings are difficult to carry out is difficult to carry out, when a needle head of the liquid taking needle is downwards inserted into an unfixed reagent bottle, the needle head is easy to impact a non-rubber part of the reagent bottle, so that the needle head is easy to impact, bend and break, and the working stability of the gas chromatograph is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the automatic sample injector for the gas chromatograph is provided for solving the problem that a reagent bottle placed on a placing ring is difficult to clamp after being placed in the traditional automatic sample injector for the gas chromatograph.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an autosampler for gas chromatograph, includes the base, installs the thing ring of putting in the base upper end outside, be vertical rotation and install the revolving rack at base upper end middle part and through the liquid needle of getting of first electric cylinder and second electric cylinder movable mounting at the revolving rack front end, put the inside of thing ring and wait the angle and seted up a plurality of jacks, put the inboard of thing ring and wait the angle and set up a plurality of spouts that communicate with the jack, the inboard equal sliding connection of a plurality of spouts has magnetism to inhale the piece, the up end of base is located puts and installs the iron core ring between thing ring and the revolving rack, the outside round trip of iron core ring has solenoid, the plastic guard shield of the upper end fixedly connected with cladding iron core ring of base, plastic guard shield and a plurality of all install the extrusion spring between the magnetism piece.

As a further description of the above technical solution:

a plurality of the magnetism piece is kept away from one side of jack equal symmetry fixedly connected with two spacing section of thick bamboo, the equal angle fixedly connected with a plurality of spacing posts with spacing section of thick bamboo looks adaptation such as the outside of plastic guard shield.

As a further description of the above technical solution:

a plurality of the magnetic suction blocks are provided with rubber pads at one side close to the jacks.

As a further description of the above technical solution:

the bottom fixedly connected with of base is the bracket of L type structure, servo motor is installed to the horizontal end bottom of bracket, servo motor's top is connected with the spacing dish with revolving rack lower extreme hard joint.

As a further description of the above technical solution:

be provided with angle locking mechanism between bracket and the spacing dish, angle locking mechanism is including installing the third electric cylinder in the vertical end outside of bracket, connecting the locking piece on third electric cylinder front end, fixing the lug on the locking piece front end and waiting the angle to set up in the spacing dish outside and with the recess of lug looks adaptation.

As a further description of the above technical solution:

the top of the horizontal end of the bracket is symmetrically and fixedly connected with two limiting sliding strips which are mutually attached to the side wall of the locking block.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. according to the utility model, a magnetic suction and pressing buckle type clamping structure is adopted, the sliding groove, the magnetic suction block, the iron core ring, the electromagnetic coil, the plastic protective cover and the extrusion spring are arranged between the object placing ring and the base, under the action of the elastic force of the extrusion spring, the rubber pad on the magnetic suction block can be attached to and extrude the outer wall of the reagent bottle in the jack under the normal state, when the electromagnetic coil is electrified, the iron core ring can generate electromagnetic force, under the magnetic suction effect between the iron core ring and the magnetic suction block, the magnetic suction blocks can synchronously slide inwards in the sliding groove, at the moment, the rubber pad can slide outwards out of the jack, the structure can automatically clamp the reagent bottle inserted into the jack of the object placing ring after being placed, the generation of impact bending and breaking phenomena in the liquid suction process of the liquid taking needle is reduced, and the working stability of the gas chromatograph is improved.

2. According to the liquid taking needle locking device, the fixed-angle locking structure is arranged, the third electric oil cylinder, the locking block, the protruding block and the groove are arranged between the bracket and the limiting disc, the servo motor can drive the limiting disc and the rotating frame to integrally rotate for a certain angle in a working state, the locking block can be driven to integrally and horizontally move towards the limiting disc when the third electric oil cylinder extends outwards, the locking operation of the limiting disc is achieved when the protruding block on the locking block is inserted into the groove in the designated position of the limiting disc, the locking operation after the rotating frame is rotationally adjusted can be carried out when the rotating frame rotates to a proper working angle, the accuracy of the rotational positioning of the liquid taking needle is improved, and meanwhile the working stability of a gas chromatograph is improved.

Drawings

Fig. 1 is an isometric view of an autosampler for a gas chromatograph in accordance with the present invention;

FIG. 2 is a schematic side sectional view of the base and the object ring of the present invention;

figure 3 is an isometric view of the bracket of the present invention.

Illustration of the drawings:

1. a base; 101. a plastic shield; 102. a limiting column; 2. a placement ring; 201. a jack; 202. a chute; 3. rotating the frame; 4. a liquid taking needle; 5. a first electric cylinder; 6. a second electric cylinder; 7. a magnetic block; 701. a rubber pad; 702. a limiting cylinder; 8. a compression spring; 9. an iron core ring; 901. an electromagnetic coil; 10. a bracket; 1001. a limiting slide bar; 11. a servo motor; 12. a limiting disc; 1201. a groove; 13. a third electric cylinder; 14. a locking block; 1401. and (4) a bump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an automatic sample injector for a gas chromatograph comprises a base 1, a placement ring 2 arranged on the outer side of the upper end of the base 1, a rotating frame 3 vertically and rotatably arranged in the middle of the upper end of the base 1, and a liquid taking needle 4 movably arranged at the front end of the rotating frame 3 through a first electric oil cylinder 5 and a second electric oil cylinder 6, wherein a plurality of jacks 201 are formed in the placement ring 2 at equal angles, a plurality of chutes 202 communicated with the jacks 201 are formed in the inner side of the placement ring 2 at equal angles, magnetic suction blocks 7 are connected to the inner sides of the chutes 202 in a sliding manner, an iron core ring 9 is arranged between the placement ring 2 and the rotating frame 3 on the upper end surface of the base 1, an electromagnetic coil 901 is wound outside the iron core ring 9, a plastic shield 101 covering the iron core ring 9 is fixedly connected to the upper end of the base 1, extrusion springs 8 are arranged between the plastic shield 101 and the magnetic suction blocks 7, the arrangement of the extrusion springs 8 can enable the electromagnetic coil 901 to be in a non-electrified state, the elastic pressing operation between the magnetic block 7 and the reagent bottle is realized.

Specifically, as shown in fig. 1 and 2, a plurality of magnetism inhale two spacing section of thick bamboos 702 of the equal symmetrical fixedly connected with in one side that piece 7 kept away from jack 201, the spacing post 102 of a plurality of and spacing section of thick bamboo 702 looks adaptation of angle fixedly connected with such as the outside of plastic guard shield 101, a plurality of magnetism inhale one side that piece 7 is close to jack 201 and install rubber pad 701, the setting of rubber pad 701 has promoted the frictional force of contact between piece 7 and the reagent bottle of inhaling on the one hand, on the other hand has reduced the production of magnetism inhale the piece 7 rigidity fish tail or the clamp injury reagent bottle phenomenon.

Specifically, as shown in fig. 1-3, a bracket 10 in an L-shaped structure is fixedly connected to the bottom of the base 1, a servo motor 11 is installed at the bottom of the horizontal end of the bracket 10, a limiting disc 12 connected to the top end of the servo motor 11 and rigidly connected to the lower end of the rotating frame 3 is connected to the top end of the servo motor 11, a fixed angle locking mechanism is arranged between the bracket 10 and the limiting disc 12, the fixed angle locking mechanism comprises a third electric cylinder 13 installed outside the vertical end of the bracket 10, and a locking block 14 connected to the front end of the third electric cylinder 13, the lug 1401 fixed on the front end of the lock block 14 and the groove 1201 which is arranged on the outer side of the limit disc 12 and is matched with the lug 1401 in an equal angle mode are arranged, the top of the horizontal end of the bracket 10 is symmetrically and fixedly connected with two limit sliding strips 1001 which are mutually attached to the side wall of the lock block 14, and the arrangement of the limit sliding strips 1001 improves the stability of horizontal sliding adjustment of the lock block 14 on one hand and improves the stability of fixed-angle locking between the lock block 14 and the limit disc 12 on the other hand.

The working principle is as follows: when the automatic sample injector is used, after the automatic sample injector is installed on a specified station of a gas chromatograph, a control circuit of the automatic sample injector can be connected with an electric cabinet of the gas chromatograph, so that the installation operation of the automatic sample injector is finished, when a reagent bottle needs to be placed in the jack 201 of the placement ring 2, the electric cabinet can be operated to control the electromagnetic coil 901 to be electrified, the iron core ring 9 can generate electromagnetic force when the electromagnetic coil 901 is electrified, under the magnetic attraction action between the iron core ring 9 and the magnetic attraction blocks 7, the magnetic attraction blocks 7 can slide inwards in the chute 202 and extrude the extrusion spring 8, the extrusion spring 8 is in a pressed state at the moment, the rubber pad 701 can slide outwards out of the jack 201, the reagent bottle can be placed in the jack 201, after the reagent bottle is placed, the electromagnetic coil 901 can be controlled to be powered off, under the elastic force of the extrusion spring 8, the magnetic attraction blocks 7 can move outwards in the chute 202, rubber pad 701 on the magnetic block 7 alright laminate and extrude the outer wall of the reagent bottle in the jack 201, thereby press from both sides the reagent bottle tightly in the jack 201, in normal work, servo motor 11 can drive spacing dish 12 and revolving rack 3 and wholly rotate certain angle, so that get liquid needle 4 and carry out the drawing liquid operation to the reagent bottle in the appointed jack 201, after servo motor 11 rotates the adjustment, electric cabinet alright automatic control third electric cylinder 13 outwards extends certain helical pitch, locking block 14 is whole just can the motion of horizontal to spacing dish 12 direction this moment, lug 1401 on locking block 14 when inserting in the recess 1201 of spacing dish 12 assigned position department, the fixed angle locking that has just accomplished revolving rack 3 stops the operation, first electric cylinder 5 and the during operation of second electric cylinder 6 this moment, alright drive get liquid needle 4 and go up and down to adjust the position and draw the liquid operation.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. An automatic sample injector for a gas chromatograph comprises a base (1), a storage ring (2) arranged on the outer side of the upper end of the base (1), a rotating frame (3) vertically and rotatably arranged at the middle part of the upper end of the base (1), and a liquid taking needle (4) movably arranged at the front end of the rotating frame (3) through a first electric oil cylinder (5) and a second electric oil cylinder (6), and is characterized in that a plurality of jacks (201) are formed in the storage ring (2) at equal angles, a plurality of chutes (202) communicated with the jacks (201) are formed in the inner side of the storage ring (2) at equal angles, magnetic blocks (7) are slidably connected to the inner sides of the chutes (202), an iron core ring (9) is arranged between the storage ring (2) and the rotating frame (3) on the upper end face of the base (1), and an electromagnetic coil (901) is wound outside the iron core ring (9), the upper end fixedly connected with of base (1) plastic guard shield (101) of cladding iron core ring (9), plastic guard shield (101) and a plurality of all install extrusion spring (8) between magnetism piece (7).

2. The autosampler for gas chromatograph according to claim 1, wherein two position-limiting cylinders (702) are symmetrically and fixedly connected to one side of each of the plurality of magnetic blocks (7) far away from the insertion hole (201), and a plurality of position-limiting columns (102) matched with the position-limiting cylinders (702) are fixedly connected to the outside of the plastic shield (101) at equal angles.

3. The autosampler for gas chromatograph according to claim 2, wherein a rubber pad (701) is mounted on a side of said plurality of magnetic blocks (7) close to the insertion hole (201).

4. The autosampler for gas chromatograph according to claim 1, characterized in that the bottom of said base (1) is fixedly connected with a bracket (10) with L-shaped structure, the bottom of the horizontal end of said bracket (10) is installed with a servo motor (11), the top of said servo motor (11) is connected with a position-limiting disk (12) which is hard connected with the lower end of said turret (3).

5. The autosampler for gas chromatograph according to claim 4, characterized in that a fixed angle locking mechanism is arranged between the bracket (10) and the limit disc (12), and the fixed angle locking mechanism comprises a third electric cylinder (13) installed outside the vertical end of the bracket (10), a locking block (14) connected to the front end of the third electric cylinder (13), a convex block (1401) fixed on the front end of the locking block (14) and a groove (1201) which is opened outside the limit disc (12) at equal angle and is matched with the convex block (1401).

6. The autosampler for gas chromatograph according to claim 5, characterized in that the top of the horizontal end of said bracket (10) is symmetrically and fixedly connected with two limit slides (1001) which fit with the side walls of the lock block (14).