Large-volume water sample automatic loading device

Abstract

The utility model relates to the technical field of large-volume water sample automatic loading, in particular to a large-volume water sample automatic loading device which comprises a loading tube, a sealing plug is fixedly connected to the outer wall of the loading tube, the sealing plug is made of silica gel, the sealing plug is of a conical structure with a large end and a small end, and a counterweight ring is arranged on the outer wall of the end, away from the sealing plug, of the loading tube. Square grooves are formed in the upper side and the lower side of the outer wall of the balance weight ring in a penetrating mode correspondingly, and extrusion blocks are arranged in the two square grooves correspondingly. Due to the fact that the sealing plug is made of the silica gel material, the sealing plug can abut against the inner wall of the SPE small column tightly, the space between the sealing plug and the inner wall of the SPE small column is sealed, meanwhile, the effects of preventing the SPE small column from being broken and improving the sealing performance are achieved, the sealing plug can be fixed through the elasticity of the silica gel, and the service life of the sealing plug is prolonged. And the end, with the counterweight ring, of the sample loading pipe is inserted into the bottom of a water sample bottle to be enriched, so that the end, entering the water sample bottle, of the sample loading pipe sinks into the bottom, and the purposes of liberating both hands and improving the use convenience are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automatic sample loading of large volume water sample, and particularly to an automatic sample loading device for large volume water sample. BACKGROUND

[0002] The automatic sample loading device for large volume water sample is an automatic sampling and pretreatment equipment specially designed for water quality analysis and environmental monitoring field; the device integrates core functions such as water sample enrichment, automatic sample loading, solid phase extraction and waste liquid treatment, realizes full automation process from water sample collection to pretreatment, and greatly improves work efficiency and data accuracy.

[0003] In the existing automatic sample loading technology of water sample, the sample loading pipe plays a key role; when operating, one end of the sample loading pipe needs to be deeply inserted into the bottom of the water sample bottle to be enriched, and the other end is connected with a connector; the connector commonly used in the market is made of hard polytetrafluoroethylene (PTFE) material; the connector realizes sealing by tightly contacting with the open end of a solid phase extraction column (SPE column); then, under the negative pressure generated by a vacuum pump, water sample flows into the SPE column from the sample loading pipe; most of the SPE columns on the market are mainly composed of a column tube made of plastic material and an internal filler, but there are also glass material column tubes, and the core function of the SPE column is to separate, enrich and purify target compounds in water sample; the waste liquid generated in the treatment process is introduced into a waste liquid bottle, so as to maintain the cleanliness and safety of the laboratory environment.

[0004] However, the existing hard PTFE connector does not have ideal sealing performance when cooperating with the glass SPE column, and improper operation can easily cause the glass SPE column to be damaged; in addition, the operator needs to hold one end of the sample loading pipe with his hand all the time, which undoubtedly limits the freedom of the operator's hands, so it is necessary to provide an automatic sample loading device for large volume water sample to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an automatic sample loading device for large volume water sample, which has the characteristics of preventing the glass SPE column from being broken, improving the sealing performance, freeing the hands, and improving the convenience.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an automatic sample loading device for large volume water sample, comprising a sample loading pipe, the outer wall of the sample loading pipe is fixedly connected with a sealing plug, the sealing plug is made of silica gel material, and the sealing plug is a tapered structure with one end large and the other end small.

[0007] The outer wall of the counterweight ring is provided with square grooves on the upper and lower sides, the interiors of the two square grooves are provided with extrusion blocks, the opposite sides of the two extrusion blocks are provided with arc-shaped grooves which are in close contact with the outer wall of the sample loading tube, the opposite sides of the two extrusion blocks are rotatably connected with rotating discs, the interiors of the two square grooves are fixedly connected with fixed plates, the outer walls of the two fixed plates are rotatably connected with screw rods which are fixedly connected with the two rotating discs respectively, and the opposite sides of the two screw rods are fixedly connected with torsion blocks.

[0008] In order to ensure the accuracy and safety of water sample collection, improve the overall performance and reliability of the device, the sample loading tube is preferably made of polytetrafluoroethylene (PTFE).

[0009] In order to improve the stability of the two rotating discs, the opposite sides of the two extrusion blocks are provided with dovetail-shaped sliding grooves, the interiors of the two dovetail-shaped sliding grooves are slidably connected with dovetail-shaped sliding blocks, and the opposite sides of the two rotating discs are fixedly connected with the two dovetail-shaped sliding blocks respectively.

[0010] In order to prevent the parts soaked in the water sample from rusting, the counterweight ring, the two extrusion blocks, the two rotating discs, the two screw rods, the two dovetail-shaped sliding blocks, the two fixed plates and the two torsion blocks are preferably made of stainless steel.

[0011] In order to facilitate the rotation of the torsion blocks by using an internal hexagonal wrench, the opposite sides of the two torsion blocks are provided with hexagonal holes.

[0012] In order to prevent the positions of the two extrusion blocks from being deviated, the two extrusion blocks are in close contact with the inner walls of the two square grooves respectively.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] Insert one end of the sample loading tube and the sealing plug into the interior of the SPE column. Since the sealing plug has a conical structure with one end larger than the other, this structure is suitable for SPE columns of different sizes (such as 3cc and 6cc). At the same time, since the sealing plug is made of silicone, it can fit tightly against the inner wall of the SPE column, sealing the space between the sealing plug and the inner wall of the SPE column. This achieves the effect of preventing the glass SPE column from breaking and improving the sealing performance. The elasticity of silicone can also be used to fix the sealing plug. Then, insert the end of the sample loading tube with the counterweight ring into the bottom of the water sample bottle to be enriched, so that the end of the sample loading tube entering the water sample bottle sinks to the bottom, thereby freeing up your hands and improving the convenience of use. Attached Figure Description

[0015] Figure 1 This is a front sectional view of the present invention.

[0016] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a partial left-side cross-sectional view of the present invention;

[0018] Figure 4 This is a diagram of the external connection structure of the extrusion block of this utility model.

[0019] In the diagram: 1. Sample tube; 2. Sealing plug; 3. Counterweight ring; 4. Square groove; 5. Extrusion block; 6. Arc groove; 7. Turntable; 8. Screw; 9. Fixing plate; 10. Torsion block; 11. Hexagonal hole; 12. Dovetail slider. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] Please refer to Figures 1 to 4 The utility model provides a kind of automatic loading device of large volume water sample, including loading tube 1, the outer wall of loading tube 1 is fixedly connected with sealing plug 2, sealing plug 2 is silica gel material, sealing plug 2 is the taper structure of one end big one end small;

[0023] The outer wall of loading tube 1 is away from sealing plug 2 one end is provided with counterweight ring 3, the upper and lower sides of the outer wall of counterweight ring 3 are all penetrated and are provided with square groove 4, the inside of two square grooves 4 is all provided with extrusion block 5, the opposite side of two extrusion blocks 5 is all opened with the arc slot 6 that is combined with the outer wall of loading tube 1, the opposite side of two extrusion blocks 5 is all rotatably connected with rotating disc 7, the inside of two square grooves 4 is all fixedly connected with fixed plate 9, the outer wall of two fixed plates 9 is all penetrated and is screw-connected with the screw rod 8 that is fixedly connected with two rotating discs 7 respectively, the opposite side of two screw rods 8 is all fixedly connected with torsion block 10.

[0024] In the embodiment: in use, first, counterweight ring 3 is sleeved on the outer wall of one end of loading tube 1, then two torsion blocks 10 are rotated by internal hexagonal wrench respectively, to drive two screw rods 8 to rotate with two rotating discs 7, while driving two extrusion blocks 5 to move to the side close to loading tube 1, until two arc grooves 6 are closely abutted with the outer wall of loading tube 1, so that counterweight ring 3 can be fixed on the outer wall of loading tube 1, since the curvature of two arc grooves 6 is matched with the outer wall of two loading tubes 1, and the inner wall of two arc grooves 6 is provided with anti-skid lines, the stability of the installation of counterweight ring 3 is improved;

[0025] Then, one end of loading tube 1 with sealing plug 2 is inserted into the inside of SPE column, since sealing plug 2 is the taper structure of one end big one end small, when sealing plug 2 enters the inside of SPE column, sealing plug 2 can abut with the inner wall of SPE column, this structure can be suitable for different specifications of SPE column (such as 3cc and 6cc), and since sealing plug 2 is silica gel material, the sealing between sealing plug 2 and the inner wall of SPE column can be realized by the elasticity of silica gel, to prevent gas leakage, and to prevent glass SPE column from breaking and improve the sealing performance, and sealing plug 2 can be fixed by the elasticity of silica gel;

[0026] Then, one end of loading tube 1 with counterweight ring 3 is inserted into the bottom of water sample bottle to be enriched, since the counterweight effect of counterweight ring 3, one end of loading tube 1 sinks into the bottom of water sample bottle, and the sealing plug 2 can be fixed, so that both hands can be freed, and the convenience of use is improved;

[0027] When working, the negative pressure generated by vacuum pump is used, and water sample flows into SPE column from loading tube 1;Then, the target compound in water sample can be separated, enriched and purified, and the waste liquid generated in the process is introduced into the waste liquid bottle due to the negative pressure generated by vacuum pump.

[0028] As a technical optimization of this utility model, the sample tube 1 is made of polytetrafluoroethylene (PTFE).

[0029] In this embodiment, polytetrafluoroethylene (PTFE) material has many excellent properties such as chemical corrosion resistance, high temperature resistance, low coefficient of friction, non-flammability, and electrical insulation, which can ensure the accuracy and safety of water sample collection, while improving the overall performance and reliability of the device.

[0030] As a technical optimization of this utility model, dovetail-shaped grooves are provided on the opposite sides of the two extrusion blocks 5, and dovetail-shaped sliders 12 are slidably connected inside the two dovetail-shaped grooves. The two dovetail-shaped sliders 12 are respectively fixedly connected to the opposite sides of the two turntables 7.

[0031] In this embodiment, two dovetail sliders 12 and two dovetail grooves are provided to improve the stability of the rotation of the two turntables 7.

[0032] As a technical optimization of this utility model, the counterweight ring 3, the two compression blocks 5, the two turntables 7, the two screws 8, the two dovetail sliders 12, the two fixing plates 9, and the two torsion blocks 10 are all made of stainless steel.

[0033] In this embodiment, since the counterweight ring 3, the two compression blocks 5, the two turntables 7, the two screws 8, the two dovetail sliders 12, the two fixing plates 9, and the two torsion blocks 10 are all made of stainless steel, the components can be prevented from rusting when they are immersed in the water sample.

[0034] As a technical optimization of this utility model, hexagonal holes 11 are provided on the opposite sides of the two twisting blocks 10.

[0035] In this embodiment: a hexagonal hole 11 is provided so that the torsion block 10 can be rotated by an internal hex wrench.

[0036] As a technical optimization of this utility model, the two extrusion blocks 5 are respectively attached to the inner walls of the two square grooves 4.

[0037] In this embodiment: Since the two extrusion blocks 5 are respectively attached to the inner walls of the two square grooves 4, the position of the two extrusion blocks 5 is prevented from deflecting.

[0038] Working principle: in use, first, the counterweight ring 3 is sleeved on one end of the upper sample tube 1, then the two torsion blocks 10 are rotated through the inner hexagonal wrench, thereby driving the two screw rods 8 to rotate with the two rotating discs 7, and driving the two extrusion blocks 5 to move to the side close to the upper sample tube 1, until the two arc-shaped grooves 6 abut closely with the outer wall of the upper sample tube 1, so that the counterweight ring 3 can be fixed on the outer wall of the upper sample tube 1, since the two arc-shaped grooves 6 are matched with the curvature of the outer wall of the two upper sample tubes 1, and the inner walls of the two arc-shaped grooves 6 are provided with anti-skid lines, thereby improving the stability of the installation of the counterweight ring 3;

[0039] Then the end of the upper sample tube 1 with the sealing plug 2 is inserted into the inside of the SPE column, since the sealing plug 2 is a tapered structure with one large end and one small end, when the sealing plug 2 enters the inside of the SPE column, the sealing plug 2 can abut with the inner wall of the SPE column, this structure can be suitable for different specifications of SPE columns (such as 3cc and 6cc), and since the sealing plug 2 is made of silica gel, the sealing between the sealing plug 2 and the inner wall of the SPE column can be sealed by the elasticity of silica gel, preventing gas leakage, and preventing the glass SPE column from breaking and improving the sealing performance, and the sealing plug 2 can be fixed by the elasticity of silica gel;

[0040] Then the end of the upper sample tube 1 with the counterweight ring 3 is inserted into the bottom of the water sample bottle to be enriched, since the counterweight effect of the counterweight ring 3, the end of the upper sample tube 1 sinks into the bottom of the water sample bottle, and the sealing plug 2 can be fixed, so as to achieve the purpose of freeing hands and improving the convenience of use;

[0041] In work, the water sample flows into the SPE column from the upper sample tube 1 by the negative pressure generated by the vacuum pump, and the target compound in the water sample can be separated, enriched and purified, and the waste liquid generated in the treatment process is introduced into the waste liquid bottle by the negative pressure generated by the vacuum pump, and the waste liquid is collected.

[0042] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic sample loading device for large-volume water samples, comprising a sample loading tube (1), characterized in that: The outer wall of the sample tube (1) is fixedly connected with a sealing plug (2), which is made of silicone and has a tapered structure with one end larger than the other. A counterweight ring (3) is provided on the outer wall of the sample tube (1) away from the sealing plug (2). Square grooves (4) are provided on both the upper and lower sides of the outer wall of the counterweight ring (3). An extrusion block (5) is provided inside the two square grooves (4). An arc groove (6) that fits against the outer wall of the sample tube (1) is provided on the opposite side of the two extrusion blocks (5). A turntable (7) is rotatably connected to the opposite side of the two extrusion blocks (5). A fixing plate (9) is fixedly connected inside the two square grooves (4). A screw (8) that is fixedly connected to the two turntables (7) is threaded through the outer wall of the two fixing plates (9). A torsion block (10) is fixedly connected to the opposite side of the two screws (8).

2. The automatic sample loading device for large-volume water samples according to claim 1, characterized in that: The sample tube (1) is made of polytetrafluoroethylene (PTFE).

3. The automatic sample loading device for large-volume water samples according to claim 1, characterized in that: Each of the two extrusion blocks (5) has a dovetail groove on its opposite side, and a dovetail slider (12) is slidably connected inside each of the two dovetail grooves. The two dovetail sliders (12) are respectively fixedly connected to the opposite side of the two turntables (7).

4. The automatic sample loading device for large-volume water samples according to claim 3, characterized in that: The counterweight ring (3), two compression blocks (5), two turntables (7), two screws (8), two dovetail sliders (12), two fixing plates (9) and two torsion blocks (10) are all made of stainless steel.

5. The automatic sample loading device for large-volume water samples according to claim 1, characterized in that: Hexagonal holes (11) are provided on the opposite sides of the two twist blocks (10).

6. The automatic sample loading device for large-volume water samples according to claim 1, characterized in that: The two extrusion blocks (5) are respectively attached to the inner walls of the two square grooves (4).

Images