Rapid nitrogen blowing concentrator

Abstract

The utility model discloses a rapid nitrogen blowing instrument which comprises a pipe body, a blowing needle and a centering block, a through hole is axially formed in the center of the centering block, the centering block is sleeved outside the blowing needle through the through hole, one end of the blowing needle is installed on the pipe body, a round pipe is installed at one end, facing the pipe body, of the centering block, and a blocking ring is installed at the other end of the round pipe. The pipe body is sleeved with an adjusting sleeve and a movable sleeve, and a plurality of fixing frames are installed between the movable sleeve and the blocking ring. The device is simple in structure, the centering block can be moved up and down by rotating the adjusting sleeve, so that the insertion depth of the blowing needle is effectively controlled, the blowing needle can be directly centered in the test tube through the centering block in the insertion process of the blowing needle, and deviation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen blowing instruments, in particular to a rapid nitrogen blowing instrument. Background Art

[0002] The nitrogen purge instrument is an analytical instrument based on nitrogen purge technology, which is used to accelerate the evaporation of volatile organic compounds (VOC) and solid residues (SRM) in sample liquids. Its main principle is to use high-purity nitrogen at a constant temperature to evaporate the solvent in the sample into gas, take away the vapor through a pneumatic device, and finally purify and concentrate the sample.

[0003] At present, existing nitrogen blowdown instruments are all equipped with a test tube rack that matches the blow needle. When in use, the test tubes need to be inserted one by one into the test tube slot of the test tube rack. Since the test tubes are of different sizes, they are inevitably tilted after insertion, which makes it impossible to set the inserted blow needle in the center, and it is impossible to accurately control the insertion depth of the blow needle, which affects the subsequent analysis data. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a rapid nitrogen blowing instrument, which can stably and centrally insert the blowing needle into inner tubes with different inner diameters through a centering block, and can accurately control the insertion depth, so as to solve the problems raised in the above background technology.

[0005] The utility model is realized through the following technical scheme: a rapid nitrogen blowing instrument, comprising a tube body, a blowing needle and a centering block, wherein a through hole is axially arranged at the center of the centering block, the centering block is sleeved on the outside of the blowing needle through the through hole, one end of the blowing needle is mounted on the tube body, a round tube is mounted on one end of the centering block facing the tube body, a blocking ring is mounted on the other end of the round tube, an adjusting sleeve and a movable sleeve are sleeved on the outside of the tube body, and a plurality of fixing frames are mounted between the movable sleeve and the blocking ring.

[0006] As a preferred technical solution, the center block is made of rubber material, the center block is arranged in a conical structure, and a plurality of ventilation channels are arranged in an annular structure on the outer ring surface of the center block.

[0007] As a preferred technical solution, an internal thread is provided on the inner wall surface of the adjusting sleeve, and an external thread is provided on the outer wall surface of the tube body. The adjusting sleeve is connected and arranged by meshing the internal thread with the external thread on the tube body. A connecting ring is installed at one end of the movable sleeve, and the other end of the connecting ring is sleeved on the outside of the adjusting sleeve. A positioning groove of an annular structure is provided on the inner ring surface of the connecting ring. A positioning ring is provided on the outer wall surface of the adjusting sleeve opposite to the positioning groove, and the positioning ring is movably arranged in the positioning groove.

[0008] As a preferred technical solution, scales are vertically provided on the outer wall surface of the tube body.

[0009] As a preferred technical solution, the blocking ring is made of a transparent plastic material.

[0010] As a preferred technical solution, the diameter of the blocking ring is set larger than the diameter of the center block.

[0011] As a preferred technical solution, a plurality of convex strips are formed on the outer wall surface of the adjusting sleeve in an annular structure.

[0012] The beneficial effects of the utility model are as follows: the utility model has a simple structure, and the centering block can be moved up and down by rotating the adjusting sleeve, thereby effectively controlling the insertion depth of the blowing needle, and during the insertion of the blowing needle, the blowing needle can be directly centered inside the test tube through the centering block, thereby avoiding deviation, and the blocking ring can prevent impurities generated during the blowing process from floating toward the tube body, thereby avoiding contamination of the tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a side view of the utility model;

[0016] Figure 3 It is a bottom view of the utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the utility model after the connecting ring is removed.

[0018] Among them, 1. tube body; 2. blowing needle; 3. centering block; 4. ventilation channel; 5. blocking ring; 6. movable sleeve; 7. adjusting sleeve; 8. connecting ring; 9. fixing frame; 10. round tube; 11. through hole; 12. positioning ring. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0021] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a rapid nitrogen blowing instrument of the utility model comprises a tube body 1, a blowing needle 2 and a centering block 3, wherein a through hole 11 is axially arranged at the center of the centering block 3, the centering block 3 is sleeved on the outside of the blowing needle 2 through the through hole 11, one end of the blowing needle 2 is mounted on the tube body 1, a round tube 10 is mounted on one end of the centering block 3 facing the tube body 1, a blocking ring 5 is mounted on the other end of the round tube 10, an adjusting sleeve 7 and a movable sleeve 6 are sleeved on the outside of the tube body 1, and a plurality of fixing frames 9 are mounted between the movable sleeve 6 and the blocking ring 5.

[0023] In this embodiment, the center block 3 is made of rubber material and is arranged in a conical structure. A plurality of ventilation channels 4 are arranged in an annular structure on the outer ring surface of the center block 3 .

[0024] In this embodiment, an internal thread is provided on the inner wall surface of the adjusting sleeve 7, and an external thread is provided on the outer wall surface of the tube body 1. The adjusting sleeve 7 is connected and arranged by meshing the internal thread with the external thread on the tube body 1. A connecting ring 8 is installed at one end of the movable sleeve 6, and the other end of the connecting ring 8 is sleeved on the outside of the adjusting sleeve 7. A positioning groove of an annular structure is provided on the inner ring surface of the connecting ring 8. A positioning ring 12 is provided on the outer wall surface of the adjusting sleeve 7 opposite to the positioning groove. The positioning ring 12 is movably arranged in the positioning groove. The connecting ring and the positioning groove are used to make the connecting ring and the adjusting sleeve movably arranged, so that the rotation of the adjusting sleeve cannot drive the rotation of the movable sleeve, and can only drive the movable sleeve to move up and down.

[0025] In this embodiment, a scale is vertically arranged on the outer wall surface of the tube body 1, and the moving position of the centering block can be known through the scale.

[0026] In this embodiment, the blocking ring 5 is made of a transparent plastic material, so that the moving position of the centering block can be clearly seen through the blocking ring, and the blowing needle can be smoothly inserted into the test tube.

[0027] In this embodiment, the diameter of the blocking ring 5 is larger than the diameter of the center block 3. The larger blocking ring can block impurities, water vapor, etc. generated from bottom to top.

[0028] In this embodiment, the outer wall surface of the adjusting sleeve 7 is protruded in an annular structure to form a plurality of convex strips, and the convex strips increase the friction and area when holding the adjusting sleeve, so that the adjusting sleeve can be rotated more quickly.

[0029] When in use, first rotate the adjusting sleeve to move the adjusting sleeve downward along the thread. The movement of the adjusting sleeve pushes the connecting ring, the movable sleeve, the fixing frame, the blocking ring and the centering block to make the bottom of the centering block flush with the bottom of the blowing needle. Then, according to the required insertion depth, rotate the adjusting sleeve in the opposite direction to make the centering block rise. As the centering block rises, the bottom of the blowing needle can be slowly exposed, and the required insertion depth can be determined according to the scale.

[0030] And after the tube body moves downward, the blowing needle can be accurately inserted into a suitable position, and the outer ring of the centering block is lowered into the opening of the test tube and the blowing needle is centrally set, so that the deployment of the blowing needle is completed quickly;

[0031] In the process of blowing, the generated gas can be discharged outward along the ventilation channel, and the impurities floating upward can be blocked by the blocking ring, thereby avoiding contamination of the tube body.

[0032] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A rapid nitrogen blowing instrument, characterized in that: The invention comprises a tube body (1), a blowing needle (2) and a centering block (3), wherein a through hole (11) is axially arranged at the center of the centering block (3), the centering block (3) is sleeved on the outside of the blowing needle (2) through the through hole (11), one end of the blowing needle (2) is mounted on the tube body (1), a round tube (10) is mounted on one end of the centering block (3) facing the tube body (1), a blocking ring (5) is mounted on the other end of the round tube (10), an adjusting sleeve (7) and a movable sleeve (6) are sleeved on the outside of the tube body (1), and a plurality of fixing frames (9) are mounted between the movable sleeve (6) and the blocking ring (5).

2. The rapid nitrogen blowing instrument according to claim 1, characterized in that: The center block (3) is made of rubber material and is arranged in a conical structure. A plurality of ventilation channels (4) are arranged in an annular structure on the outer ring surface of the center block (3).

3. The rapid nitrogen blowing instrument according to claim 1, characterized in that: The inner wall surface of the adjusting sleeve (7) is provided with an internal thread, and the outer wall surface of the pipe body (1) is provided with an external thread. The adjusting sleeve (7) is connected to the external thread on the pipe body (1) by meshing the internal thread. A connecting ring (8) is installed at one end of the movable sleeve (6). The other end of the connecting ring (8) is sleeved on the outside of the adjusting sleeve (7). A positioning groove of an annular structure is provided on the inner ring surface of the connecting ring (8). A positioning ring (12) is provided on the outer wall surface of the adjusting sleeve (7) opposite to the positioning groove. The positioning ring (12) is movably arranged in the positioning groove.

4. The rapid nitrogen blowing instrument according to claim 1, characterized in that: The outer wall surface of the tube body (1) is vertically provided with scales.

5. The rapid nitrogen blowing instrument according to claim 1, characterized in that: The blocking ring (5) is made of transparent plastic material.

6. The rapid nitrogen blowing instrument according to claim 1, characterized in that: The diameter of the blocking ring (5) is set larger than the diameter of the centering block (3).

7. The rapid nitrogen blowing instrument according to claim 1, characterized in that: The outer wall surface of the adjusting sleeve (7) is protruded in an annular structure to form a plurality of convex strips.

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