Cleaning device for sample injection needle

Abstract

The utility model relates to the technical field of sample injection needle cleaning devices, in particular to a sample injection needle cleaning device which comprises a pipe body, a rubber seat arranged on the pipe body in a sliding mode, a driving pipe arranged on the rubber seat in a rotating mode and an air heater connected to the end of the driving pipe in a threaded mode and further comprises a first inlet and outlet hole formed in the rubber seat. And the unfolding assembly is arranged on the pipe body and connected with the driving pipe, and when the driving pipe is rotated, the unfolding assembly is used for driving the first inlet and outlet hole to be unfolded, so that the front end and the rear end of the rubber seat uniformly discharge hot air through the first inlet and outlet hole, and according to the cleaning device for the sample injection needle, the driving pipe is rotated by 90 degrees, and the first inlet and outlet hole is driven to be unfolded through the unfolding assembly; the front end and the rear end of the rubber base uniformly discharge hot air through the first inlet and outlet hole, water drops left on the inner wall of the pipe body are treated, the driving pipe is reversely rotated by 90 degrees to drive the first inlet and outlet hole to be closed, the device can conduct next-time normal sample injection, and the device has high practicability in the actual use process.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning devices for injection needles, in particular to a cleaning device for injection needles. Background Art

[0002] The injection needle is a component commonly used in laboratory analytical instruments, mainly used to introduce samples into analytical instruments.

[0003] In the field of gas and liquid chromatography, after the injection needle is used for sampling, there is sample residue in the injection needle, which will cause sample cross-contamination during the second injection (other samples), affecting the analysis results. Currently, there are two cleaning methods for the injection needle: inner wall cleaning and outer wall cleaning. After cleaning, it is necessary to deal with the cleaning water droplets attached to the inner wall of the injection needle before the next injection can be performed. Usually, the piston inside the injection needle is pushed up and down to drive the cleaning water droplets on the inner wall of the injection needle pipe to be pushed out. However, this method will still leave some water droplets, affecting the analysis results and making the results inaccurate. For this reason, we propose a cleaning device for the injection needle. Utility Model Content

[0004] A technical problem to be solved by the present application is to design a sampling needle cleaning device that can quickly perform the next sampling.

[0005] To achieve the above object, the utility model provides the following technical solutions: a cleaning device for a sampling needle, comprising a tube body, a rubber seat slidably arranged on the tube body, a driving tube rotatably arranged on the rubber seat, and a hot air blower threadedly connected to the end of the driving tube, and also comprising

[0006] An inlet and outlet hole 1 is provided on the rubber seat;

[0007] The expansion component is arranged on the tube body and connected with the driving tube. When the driving tube is rotated, the expansion component is used to drive the inlet and outlet hole 1 to expand, so that the front and rear ends of the rubber seat discharge hot air evenly through the inlet and outlet hole 1.

[0008] The measures to further optimize this technical solution are:

[0009] In some embodiments, the unfolding assembly includes a hollow block rotatably set on a rubber seat, the driving tube is fixed and passes through the hollow block, the hollow block is provided with an inlet and outlet hole 2, the inlet and outlet hole 1 cooperates with the inlet and outlet hole 2, and the rubber seat is provided with a positioning piece for positioning the hollow block.

[0010] In some embodiments, the positioning member includes a blocking block arranged on the adjustment seat, the rubber seat is provided with an arc groove, the blocking block is slidably arranged on the arc groove, and the hollow block is provided with a connecting member connecting the driving tube and the rubber seat.

[0011] In some embodiments, the connecting member includes a hole arranged on the hollow block, and the hole is provided in plurality. A guide member is provided in the tube body to prevent the rubber block from rotating.

[0012] In some embodiments, the guide member includes a guide block disposed on the tube body, and the rubber seat is slidably disposed on the guide block.

[0013] In some embodiments, a thread block 1 is provided on the driving tube, a thread block 2 is provided at the output end of the hot air blower, and the thread block 1 is threadedly connected to the thread block 2.

[0014] In some embodiments, a plurality of air outlet holes are disposed on the driving tube, and the plurality of air outlet holes are disposed and are linearly arranged on the driving tube.

[0015] The utility model has at least the following beneficial effects:

[0016] Rotate the drive tube 90 degrees, drive the inlet and outlet hole 1 to expand through the expansion component, so that the front and rear ends of the rubber seat can evenly discharge hot air through the inlet and outlet hole 1 to deal with the water droplets remaining on the inner wall of the tube body, rotate the drive tube 90 degrees in the opposite direction, drive the inlet and outlet hole 1 to close, and the device can perform the next normal sampling. It has high practicality in actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 Schematic diagram of some structures;

[0019] Figure 3 For this utility model Figure 2 Explosion diagram of some structures;

[0020] Figure 4 For this utility model Figure 2 Schematic diagram of some structures;

[0021] Figure 5 For this utility model Figure 4 Schematic diagram of the local cross-section structure;

[0022] Figure 6 For this utility model Figure 5 Schematic diagram of the local cross-section structure;

[0023] Figure 7 This is a schematic diagram of the overall structure of Example 2 of the utility model.

[0024] In the figure: 1. tube body; 2. rubber seat; 3. drive tube; 4. hot air blower; 5. inlet and outlet hole 1; 6. expansion assembly; 61. hollow block; 62. inlet and outlet hole 2; 7. positioning member; 71. blocking block; 72. arc groove; 8. connecting member; 81. hole; 9. guide member; 91. guide block; 10. threaded block 1; 11. threaded block 2; 12. air outlet. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] See also Figure 1-6 The utility model provides a technical solution: a cleaning device for a sampling needle, comprising a tube body 1, a rubber seat 2 slidably arranged on the tube body 1, a driving tube 3 rotatably arranged on the rubber seat 2, and a hot air blower 4 threadedly connected to the end of the driving tube 3, and also comprising

[0028] An inlet and outlet hole 5 is provided on the rubber seat 2;

[0029] The expansion component 6 is arranged on the tube body 1 and connected to the driving tube 3. When the driving tube 3 is rotated, the expansion component 6 is used to drive the inlet and outlet hole 5 to expand, so that the front and rear ends of the rubber seat 2 evenly discharge hot air through the inlet and outlet hole 5.

[0030] The unfolding assembly 6 includes a hollow block 61 rotatably set on the rubber seat 2, the driving tube 3 is fixedly passed through the hollow block 61, the hollow block 61 is provided with an inlet and outlet hole 2 62, the inlet and outlet hole 1 5 cooperates with the inlet and outlet hole 2 62, and the rubber seat 2 is provided with a positioning member 7 for positioning the hollow block 61.

[0031] The positioning member 7 includes a blocking block 71 arranged on the adjustment seat, an arc groove 72 is arranged on the rubber seat 2, the blocking block 71 is slidably arranged on the arc groove 72, and a connecting member 8 connecting the driving tube 3 and the rubber seat 2 is arranged on the hollow block 61.

[0032] The connecting member 8 includes a hole 81 arranged on the hollow block 61, and a plurality of holes 81 are provided. A guide member 9 is provided in the tube body 1 to prevent the rubber block from rotating.

[0033] The guide member 9 comprises a guide block 91 arranged on the tube body 1 , and the rubber seat 2 is slidably arranged on the guide block 91 .

[0034] A threaded block 10 is provided on the driving tube 3, and a threaded block 2 11 is provided at the output end of the hot air blower 4. The threaded block 10 is threadedly connected to the threaded block 2 11. The threaded connection between the threaded block 10 and the threaded block 2 11 allows the hot air blower 4 and the driving tube 3 to be disassembled, which facilitates the use of the device.

[0035] When in use, the driving tube 3 is rotated 90 degrees. Due to the limit of the guide block 91, the rubber seat 2 does not rotate. The driving tube 3 drives the hollow block 61 to rotate 90 degrees. The blocking block 71 on the hollow block 61 slides along the arc groove 72. When the hollow block 61 rotates 90 degrees, the blocking block 71 is limited by the arc groove 72. At this time, the inlet and outlet hole 62 on the hollow block 61 and the inlet and outlet hole 5 on the rubber seat 2 overlap with each other, and the hot air blower 4 is started. The output end of the hot air blower 4 outputs The hot air passes through the threaded block 2 11 and enters the threaded block 1 10. The hot air then enters the drive tube 3 from the threaded block 10. The hot air in the drive tube 3 enters the hollow block 61. The hot air then enters the inlet and outlet holes 1 5 and the inlet and outlet holes 2 62 from the holes 81 on the hollow block 61 and is discharged. This allows the front and rear ends of the rubber seat 2 to evenly discharge hot air. The rubber seat 2 is then slid up and down, driving the hot air at the front and rear ends of the rubber seat 2 to evenly act on the inner wall of the tube body 1, evaporating the water droplets attached to the inner wall.

[0036] When the cleaning is finished, the driving tube 3 is rotated 90 degrees in the opposite direction, and the hollow block 61 blocks the inlet and outlet hole 5 on the rubber seat 2, so that the device can perform the next injection.

[0037] Example 2

[0038] See also Figure 7 , the utility model provides a technical solution:

[0039] Different from Example 1, a plurality of air outlet holes 12 are provided on the driving tube 3. There are a plurality of air outlet holes 12, which are linearly arranged on the driving tube 3. The hot air is evenly discharged from the front and rear ends of the rubber seat 2 and the outer wall of the driving tube 3 through the holes 81, thereby accelerating the evaporation efficiency and improving the working efficiency.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cleaning device for a sampling needle, comprising a tube body (1), a rubber seat (2) slidably arranged on the tube body (1), a driving tube (3) rotatably arranged on the rubber seat (2), and a hot air blower (4) threadedly connected to the end of the driving tube (3), characterized in that: Also includes An inlet and outlet hole (5) is provided on the rubber seat (2); The expansion component (6) is arranged on the tube body (1) and connected to the driving tube (3). When the driving tube (3) is rotated, the expansion component (6) is used to drive the inlet and outlet hole (5) to expand, so that the front and rear ends of the rubber seat (2) are evenly discharged through the inlet and outlet hole (5).

2. The cleaning device for the injection needle according to claim 1, characterized in that: The unfolding assembly (6) comprises a hollow block (61) rotatably arranged on a rubber seat (2), the driving tube (3) is fixedly passed through the hollow block (61), the hollow block (61) is provided with a second inlet and outlet hole (62), the first inlet and outlet hole (5) cooperates with the second inlet and outlet hole (62), and the rubber seat (2) is provided with a positioning member (7) for positioning the hollow block (61).

3. The cleaning device for the injection needle according to claim 2, characterized in that: The positioning member (7) comprises a blocking block (71) arranged on the adjustment seat, the rubber seat (2) is provided with an arc groove (72), the blocking block (71) is slidably arranged on the arc groove (72), and the hollow block (61) is provided with a connecting member (8) for connecting the driving tube (3) and the rubber seat (2).

4. The cleaning device for the injection needle according to claim 3, characterized in that: The connecting member (8) comprises a hole (81) arranged on the hollow block (61), wherein a plurality of holes (81) are provided, and a guide member (9) for preventing the rubber block from rotating is provided in the tube body (1).

5. The cleaning device for the injection needle according to claim 4, characterized in that: The guide member (9) comprises a guide block (91) arranged on the tube body (1), and the rubber seat (2) is slidably arranged on the guide block (91).

6. The cleaning device for the injection needle according to claim 5, characterized in that: The drive tube (3) is provided with a threaded block 1 (10), and the output end of the hot air blower (4) is provided with a threaded block 2 (11), and the threaded block 1 (10) is threadedly connected to the threaded block 2 (11).

7. The cleaning device for injection needle according to claim 6, characterized in that: The driving tube (3) is provided with a plurality of air outlet holes (12), and the air outlet holes (12) are provided in plurality and are respectively arranged linearly on the driving tube (3).

Images