CN214096875U

CN214096875U - Clamping mechanism of nitrogen blowing instrument

Info

Publication number: CN214096875U
Application number: CN202023240546.4U
Authority: CN
Inventors: 李剑睿; 赵润柱
Original assignee: Taiyuan Institute of Technology
Current assignee: Taiyuan Institute of Technology
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-08-31
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses a fixture of nitrogen blowing appearance, including sample locating rack and distribution plate, the distribution plate is used for fixed syringe needle, and sample locating rack and distribution plate all set up on the support of nitrogen blowing appearance, and sample locating rack below is equipped with the support tray, and the syringe needle is located and is central symmetric distribution on the distribution plate, the centre gripping unit that is equipped with the syringe needle one-to-one on the sample locating rack, the centre gripping unit sets to following the radial movement of sample locating rack, the centre gripping unit is including relative clamping part one and the clamping part two that sets up, and clamping part one and clamping part two all slide the setting on the layer board, but the setting of layer board radial movement all sets up the elastic component on the sample locating rack between clamping part one and clamping part two and the layer board. The utility model discloses a clamping structure of nitrogen-blowing instrument can radially adjust test tube position to after preventing to change the different test tube of thickness, simple structure, convenient operation are pasted on the test tube inner wall to the syringe needle.

Description

Clamping mechanism of nitrogen blowing instrument

Technical Field

The utility model relates to an experimental apparatus technical field especially relates to a fixture of nitrogen blowing appearance.

Background

The nitrogen blow-drying instrument is also called as: nitrogen gas enrichment facility, nitrogen gas sweep the appearance, nitrogen gas blows concentrated appearance, and the concentrated appearance of sample is called for short: nitrogen blowing instrument, nitrogen blowing instrument and concentration instrument. Usually, nitrogen is blown into the surface of the heated sample to concentrate the sample, which has the characteristics of time saving, convenient operation, easy control and the like, and can quickly obtain expected results. The method is widely applied to the industries of pesticide residue analysis, commodity inspection, food, environment, pharmacy, biological products and the like and the sample preparation in liquid phase, gas phase and mass spectrum analysis.

The clamping structure is an important component in the nitrogen blowing instrument and is mainly used for clamping and fixing a nitrogen needle tube and a sample test tube, the existing clamping mechanism of the nitrogen blowing instrument mainly comprises a balance weight plate for installing a needle head, a hard sample fixing frame for fixing the sample test tube and a supporting tray for supporting the sample test tube, the existing sample fixing frame is inconvenient to adjust the position of the sample test tube in the radial direction, particularly, most sample test tube frames directly clamp the test tube in a clamping groove on the sample test tube frame, the position and the shape of the clamping groove can not be adjusted, the situation that the center of the test tube deviates relative to the needle head can occur after the test tubes of different specifications are replaced, particularly after the test tubes of different thicknesses are replaced, the position of the needle head needs to be adjusted frequently, at the moment, the frequent adjustment of the needle head can influence the connection stability of the test tube with the nitrogen pipeline, and certain potential safety hazards exist, therefore, improvements are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a clamping structure of nitrogen-blowing appearance through the syringe needle on the gas distribution dish under the condition that need not to adjust, the centre gripping unit on the direct operation sample locating rack can be along the position of radially adjusting the test tube for after changing different specification test tubes, can insert the position behind the test tube inside along radially adjusting the syringe needle, prevent that the syringe needle from sticking the wall.

In order to solve the technical problem, the utility model provides a fixture of nitrogen blowing appearance, including sample locating rack and distribution plate, the distribution plate is used for fixed syringe needle, and sample locating rack and distribution plate all set up on the support of nitrogen blowing appearance, and sample locating rack below is equipped with the support tray, and the syringe needle is located and is central symmetric distribution on the distribution plate, the last centre gripping unit that is equipped with the syringe needle one-to-one of sample locating rack, the centre gripping unit sets to following the radial movement of sample locating rack, the centre gripping unit is including relative clamping part one and the clamping part two that sets up, and clamping part one and clamping part two all slide and set up on the layer board, but the setting of layer board radial movement is on the sample locating rack, wherein:

all set up the elastic component between clamping part one and clamping part two and the layer board, the elastic component sets up to provide elasticity for clamping part one and clamping part two are from both sides to the test tube centre gripping.

Preferably, one side of the supporting plate is slidably sleeved on a sliding rod, the other side of the supporting plate is in threaded connection with a screw rod, one end of the sliding rod is fixed on the support, and one end of the screw rod is rotatably connected to the support.

Preferably, the supporting plate is U-shaped, and the first clamping part and the second clamping part are arc-shaped and are oppositely arranged on two sides of the inner cavity of the supporting plate.

Preferably, the elastic part is a spring, one side of the first clamping part and one side of the second clamping part are respectively fixed with one end of each of the two springs, and the other end of each of the two springs is fixed on the supporting plate.

Preferably, the upper surface and the lower surface of the first clamping part and the second clamping part are respectively provided with a sliding block, the two sides of the inner cavity of the supporting plate are respectively provided with a cavity for accommodating the first clamping part and the second clamping part, the inner wall of each cavity is provided with a sliding groove corresponding to the sliding blocks one by one, and the sliding blocks are arranged in the sliding grooves in a sliding manner.

Preferably, the first clamping part and the second clamping part are provided with guide sections inclining to one side at one end of the supporting plate opening.

The utility model provides a nitrogen blows appearance fixture can be in the position of radial regulation test tube, after changing different specification test tubes, can be under the condition that need not to adjust the syringe needle, directly adjusts the test tube position to the adherence phenomenon can not appear after the guarantee syringe needle inserts the test tube, and the structure is comparatively simple, and convenient operation, only needs to rotate the screw rod and can realize the regulation of test tube at radial position.

Drawings

Fig. 1 is a schematic view of the clamping structure of the nitrogen blowing instrument of the present invention.

Fig. 2 is a schematic view of the clamping unit of the nitrogen blowing instrument clamping structure of the present invention.

Fig. 3 is a schematic view of the split of the clamping unit of the nitrogen blowing instrument clamping structure of the present invention.

The reference numbers illustrate:

the device comprises a sample positioning frame 1, a gas distribution plate 2, a needle 3, a support 4, a support tray 5, a clamping unit 6, a first clamping part 61, a second clamping part 62, a supporting plate 63, an elastic piece 64, a sliding rod 65, a screw 66, a sliding block 67, a sliding groove 68 and a guide section 69.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

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 efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a clamping mechanism of a nitrogen blowing instrument, including a sample positioning frame 1 and a gas distribution plate 2, the gas distribution plate 2 is used for fixing a needle 3, the sample positioning frame 1 and the gas distribution plate 2 are both disposed on a support 4 of the nitrogen blowing instrument, a support tray 5 is disposed below the sample positioning frame 1, the needles 3 are disposed on the gas distribution plate 2 and are distributed in a central symmetry manner, clamping units 6 are disposed on the sample positioning frame 1 in one-to-one correspondence with the needles 3, the clamping units 6 are configured to move along a radial direction of the sample positioning frame 1, the clamping units 6 include a first clamping portion 61 and a second clamping portion 62 which are disposed oppositely, the first clamping portion 61 and the second clamping portion 62 are both slidably disposed on a supporting plate 63, the supporting plate 63 is radially movable on the sample positioning frame 1, specifically, one side of the supporting plate 63 is slidably sleeved on a sliding rod 65, the sliding rod 65 is used for supporting and fixing one side of the supporting plate 63, the other side of the sample tube is in threaded connection with a screw 66, one end of a sliding rod 65 is fixed on a support 4, one end of the screw 66 is rotatably connected on the support 4, after the screw 66 is rotated, a support plate 63 moves in the axial direction of the sliding rod 65 and the screw 66 to realize the adjustment of the radial position of the sample tube, elastic pieces 64 are arranged between a first clamping part 61, a second clamping part 62 and the support plate 63, the elastic pieces 64 are arranged to provide elastic force for the first clamping part 61 and the second clamping part 62, so that the first clamping part 61 and the second clamping part 62 clamp the sample tube from two sides, the elastic pieces 64 are springs, one sides of the first clamping part 61 and the second clamping part 62 are respectively fixed with one ends of the two springs, the other ends of the two springs are fixed on the support plate 63, the springs keep the first clamping part 61 and the second clamping part 62 in a clamping state in an initial state, when a water pipe enters between the first clamping part 61 and the second clamping part 62, the spring is compressed to utilize self deformation to provide clamping force for clamping part one 61 and clamping part two 62, at this moment, the supporting role of cooperation support tray 5 can realize the stable support to the sample test tube.

In the operation process, after changing different models, especially different thicknesses of sample tubes, in the prior art, the clamping groove on the sample holder can not be adjusted radially close to the center of the circle, which results in that the centers of the different thicknesses of the test tubes can deviate after being placed on the sample holder, at this time, conventionally, the needle 3 on the gas distribution plate 2 is operated to adjust the position of the needle 3, and the needle 3 is connected to the nitrogen tube through a hose, so that frequent operation of the needle 3 can easily cause the joint part of the needle 3 to be loosened, especially when nitrogen is supplied, the pressure is high, and the mode has certain potential safety hazard, therefore, after adopting the scheme, the supporting plate 63 can be directly matched with the clamping unit 6 to carry the sample tubes to move radially on the premise of not adjusting the position of the needle 3, so that the needle 3 can not be attached to the wall of the test tube after being inserted into the test tube, the problem that prior art exists has effectively been solved, and, the structure is comparatively simple, only needs to rotate screw rod 66 and can realize the sample test tube in the ascending position control of footpath.

Layer board 63 is "U" shape, and clamping part one 61 and clamping part two 62 are the arc to set up the both sides at layer board 63 inner chamber relatively, the opening of layer board 63 one end can form the test tube and get into/leave the passageway between clamping part one 61 and the clamping part two 62, simple structure, effective.

The upper and lower two surfaces of clamping part one 61 and clamping part two 62 all are equipped with slider 67, the both sides of layer board 63 inner chamber all are equipped with the cavity that is used for clamping part one 61 and two 62 accommodations of clamping part, the cavity inner wall is equipped with the spout 68 with slider 67 one-to-one, slider 67 slides and sets up in spout 68, utilize slider 67 and spout 68's limiting displacement, make clamping part one 61 and two 62 of clamping part press from both sides tightly with open action process orbit stable, and simultaneously, layer board 63 has the cavity that holds clamping part one 61 and two 62 of clamping part, make the cavity can provide the flexible orbit of clamping part one 61 and two 62 of clamping part, reduce the overall dimension of clamping unit 6, and make the structure compacter.

Clamping part 61 and clamping part two 62 are located layer board 63 open-ended one end and all are equipped with direction section 69 to a lopsidedness, two direction sections 69 in same clamping unit 6 are the flaring form, when the test tube was put into between clamping part 61 and the clamping part two 62, directly put into between two direction sections 69 with the test tube, then direct inside promotion test tube, direction section 69 can make clamping part 61 and clamping part two 62 open automatically, when the test tube entered into between clamping part 61 and the clamping part two 62, the spring recovery in-process of compressed, automatically, it presss from both sides tight with the test tube surface to drive clamping part one 61 and clamping part two 62, and provide stable clamping force for clamping part one 61 and clamping part two 62.

The above is only the preferred embodiment of the present invention, not limiting the scope of the present invention, all of which are under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. The utility model provides a fixture of nitrogen blowing appearance, includes sample locating rack (1) and distribution plate (2), and distribution plate (2) are used for fixed syringe needle (3), and sample locating rack (1) and distribution plate (2) all set up on support (4) of nitrogen blowing appearance, and sample locating rack (1) below is equipped with support tray (5), its characterized in that: the syringe needle (3) are located and are central symmetric distribution on distributing plate (2), and sample locating rack (1) is gone up and is equipped with clamping unit (6) with syringe needle (3) one-to-one, clamping unit (6) set to can follow the radial movement of sample locating rack (1), clamping unit (6) are including relative clamping part one (61) and clamping part two (62) that set up, and clamping part one (61) and clamping part two (62) all slide and set up on layer board (63), but layer board (63) radial movement's setting is on sample locating rack (1), wherein:

all set up elastic component (64) between clamping part (61) and clamping part two (62) and layer board (63), elastic component (64) set up and provide elasticity for clamping part one (61) and clamping part two (62) are from both sides to the test tube centre gripping.

2. The clamping mechanism of the nitrogen blowing instrument as claimed in claim 1, wherein one side of the supporting plate (63) is slidably sleeved on a sliding rod (65), the other side of the supporting plate is in threaded connection with a screw rod (66), one end of the sliding rod (65) is fixed on the bracket (4), and one end of the screw rod (66) is rotatably connected on the bracket (4).

3. The clamping mechanism of the nitrogen blowing instrument as claimed in claim 2, characterized in that the supporting plate (63) is U-shaped, and the first clamping part (61) and the second clamping part (62) are arc-shaped and are oppositely arranged at two sides of the inner cavity of the supporting plate (63).

4. The clamping mechanism of the nitrogen blowing instrument according to the claim 3, characterized in that the elastic member (64) is a spring, one side of the first clamping part (61) and one side of the second clamping part (62) are respectively fixed with one end of the two springs, and the other end of the two springs are both fixed on the supporting plate (63).

5. The clamping mechanism of the nitrogen blowing instrument according to claim 4, wherein the upper surface and the lower surface of the first clamping part (61) and the second clamping part (62) are respectively provided with a sliding block (67), the two sides of the inner cavity of the supporting plate (63) are respectively provided with a cavity for accommodating the first clamping part (61) and the second clamping part (62), the inner wall of the cavity is provided with sliding grooves (68) which are in one-to-one correspondence with the sliding blocks (67), and the sliding blocks (67) are arranged in the sliding grooves (68) in a sliding manner.

6. The clamping mechanism of the nitrogen blowing instrument according to any one of the claims 1 to 5, characterized in that one end of the first clamping part (61) and one end of the second clamping part (62) which are positioned at the opening of the supporting plate (63) are provided with guide sections (69) which are inclined towards one side.