A needle protection mechanism for a gas chromatograph

Abstract

This utility model discloses a protective mechanism for the injection needle of a gas chromatograph, relating to the field of gas chromatograph technology. It includes a needle tube with an auxiliary component fixedly connected to one end. In this utility model, a first protective shell and a second protective shell are engaged. Two limiting rings are connected, and buffer components one and two are fitted against the outer ring surface of the needle tube. A buffer sleeve protects the injection rod externally. Buffer components one and two provide cushioning to the outside of the needle tube. The protective sleeve reinforces the connection between the first and second protective shells, ensuring the protective effect of the first and second protective shells on the needle tube and reducing collision damage during use, thus ensuring normal use of the injection needle. The mounting plate and arc-shaped limiting block are connected to the gas chromatograph and the injection port respectively, improving the stability of the injection needle during use and reducing needle shaking.

Description

Technical Field

[0001] This utility model relates to the field of gas chromatography technology, and in particular to a needle protection mechanism for a gas chromatograph. Background Technology

[0002] A gas chromatograph is an instrument used to separate and analyze various components in complex mixtures. The injection needle is a small but crucial component of a gas chromatograph, used to precisely inject the sample into the gas chromatograph's injection port.

[0003] When maintenance personnel perform maintenance on a gas chromatograph, they may damage it due to contact with tools or other parts. Damaged injection needles may cause problems such as inaccurate injection volume and sample residue, thus affecting the normal use of the injection needles. Utility Model Content

[0004] The purpose of this invention is to solve the problem that when maintenance personnel perform maintenance on a gas chromatograph, the instrument may be damaged due to contact with tools or other parts. Damaged injection needles may cause problems such as inaccurate injection volume and sample residue, thus affecting the normal use of the injection needle. Therefore, this invention proposes a protective mechanism for the injection needle of a gas chromatograph.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a protective mechanism for a gas chromatograph injection needle, comprising a needle tube, an auxiliary component fixedly connected to one end of the needle tube, a protective assembly provided on one side of the auxiliary component, the protective assembly comprising a protective sleeve, a second protective shell, and a first buffer component, the first protective shell being engaged with one side of the second protective shell, the inner walls of both the first and second protective shells being fixedly connected to the first buffer component, and the second buffer component being fixedly connected to the inner wall of the second protective shell, two limiting rings being provided on one side of the second buffer component, the inner walls of the two limiting rings being fixedly connected to the first and second protective shells respectively, the first and second protective shells being connected to the protective sleeve by threads, and a guide ring being slidably connected to one end of the first and second protective shells, the inner ring surface of the guide ring being fixedly connected to the auxiliary component.

[0006] Preferably, a buffer sleeve is fixedly connected to the top of the auxiliary component, and an injection rod is inserted through the buffer sleeve and the auxiliary component, with the injection rod slidably connected to the buffer sleeve.

[0007] Preferably, one end of the injection rod is slidably connected to the needle tube, and a needle is installed at one end of the needle tube.

[0008] Preferably, a locking block is fixedly connected to one side of the first protective shell and the second protective shell, and a guide block is inserted into one side of the locking block.

[0009] Preferably, a support rod is slidably connected to the top of the guide block, an auxiliary ring is fixedly connected to the top of the support rod, and one side of the auxiliary ring is fixedly connected to an auxiliary component.

[0010] Preferably, an electric push rod is fixedly connected to the bottom of the guide block, and a mounting plate is fixedly connected to one end of the electric push rod. A mounting hole is provided on one side of the mounting plate.

[0011] Preferably, the mounting plate is threaded to a threaded rod, and one end of the threaded rod is rotatably connected to an arc-shaped limiting block.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, one side of the buffer component two is fixedly connected to the inner wall of the protective shell two, and the protective shell one and the protective shell two are engaged and connected. The two limiting rings are connected, the buffer component one and the buffer component two are in contact with the outer ring surface of the needle tube, and the outside of the injection rod is wrapped and protected by the buffer sleeve. The buffer component one and the buffer component two can buffer the outside of the needle tube. The protective sleeve can strengthen the connection between the protective shell one and the protective shell two, thereby ensuring the protective effect of the protective shell one and the protective shell two on the needle tube, reducing the collision damage during the use of the entire injection needle, and thus ensuring the normal use of the injection needle.

[0014] 2. In this utility model, one end of the electric push rod is fixedly connected to the mounting plate, and the guide block is slidably connected to the support rod. The guide block is moved along the support rod, and one end of the guide block is engaged with the locking block. The electric push rod drives the mounting plate to move down, so that the bottom of the mounting plate overlaps with the top of the gas chromatograph. By using the connection between the mounting plate and the arc-shaped limiting block and the gas chromatograph and the injection port respectively, the stability of the injection needle during use can be improved and the shaking of the injection needle can be reduced. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural schematic diagram of the injection needle protection mechanism for a gas chromatograph.

[0016] Figure 2 This utility model provides a schematic diagram of the installation of a protective sleeve structure for the injection needle protection mechanism of a gas chromatograph.

[0017] Figure 3 This utility model provides a schematic diagram of the needle structure installation of a gas chromatograph's injection needle protection mechanism.

[0018] Figure 4 This utility model provides a schematic diagram of the needle tube structure installation of the injection needle protection mechanism for a gas chromatograph.

[0019] Figure 5This utility model provides a schematic diagram of the installation of the buffer component of the injection needle protection mechanism for a gas chromatograph.

[0020] Legend: 1. Auxiliary ring; 2. Guide block; 3. Mounting plate; 4. Threaded rod; 5. Arc-shaped limiting block; 6. Electric push rod; 7. Auxiliary component; 8. Support rod; 9. Limiting ring; 10. Protective sleeve; 11. Locking block; 12. Buffer sleeve; 13. Protective shell one; 14. Needle; 15. Guide ring; 16. Protective shell two; 17. Needle tube; 18. Buffer component one; 19. Buffer component two; 20. Injection rod. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: Refer to Figures 1-5 As shown: A protective mechanism for the injection needle of a gas chromatograph includes a needle tube 17. An auxiliary component 7 is fixedly connected to one end of the needle tube 17. A protective assembly is provided on one side of the auxiliary component 7. The protective assembly includes a protective sleeve 10, a second protective shell 16, and a first buffer 18. A first protective shell 13 is engaged with one side of the second protective shell 16. The inner walls of both the first protective shell 13 and the second protective shell 16 are fixedly connected to the first buffer 18. A second buffer 19 is fixedly connected to the inner wall of the second protective shell 16. Two limiting rings 9 are provided on one side of the second buffer 19, and the inner walls of the two limiting rings 9 are respectively engaged with… Protective outer shell 13 and protective outer shell 2 16 are fixedly connected. Protective outer shell 13 and protective outer shell 2 16 are connected to protective sleeve 10 by threads. One end of protective outer shell 13 and protective outer shell 2 16 is slidably connected to a guide ring 15. The inner ring surface of the guide ring 15 is fixedly connected to the auxiliary component 7. A buffer sleeve 12 is fixedly connected to the top of the auxiliary component 7. An injection rod 20 is inserted through the buffer sleeve 12 and the auxiliary component 7. The injection rod 20 is slidably connected to the buffer sleeve 12. One end of the injection rod 20 is slidably connected to the needle tube 17. A needle 14 is installed at one end of the needle tube 17.

[0024] The auxiliary component 7 can protect the top of the needle tube 17. The protective shell 13 and the protective shell 2 16 can be engaged to form a cavity, which encloses the needle tube 17 and protects it. The buffer 2 19 and the buffer 18 are both made of rubber, which can buffer and protect the outside of the needle tube 17, reducing the impact and damage during use. The upper height of the protective sleeve 10 can be limited by the limiting ring 9. The threaded connection between the protective sleeve 10 and the protective shell 13 and the protective shell 2 16 can adjust the height of the protective sleeve 10, which facilitates the shielding and protection of the needle 14 and its use. When the protective sleeve 10 wraps and protects the needle 14, it can reduce the bending and damage of the needle 14. The sliding of the injection rod 20 inside the needle tube 17 can accelerate the discharge of the sample, thereby ensuring the use of the entire injection needle.

[0025] Example 2: Figures 1-3 As shown, a locking block 11 is fixedly connected to one side of the protective shell 13 and the protective shell 2 16. A guide block 2 is inserted into one side of the locking block 11. A support rod 8 is slidably connected to the top of the guide block 2. An auxiliary ring 1 is fixedly connected to the top of the support rod 8, and one side of the auxiliary ring 1 is fixedly connected to the auxiliary component 7. An electric push rod 6 is fixedly connected to the bottom of the guide block 2. A mounting plate 3 is fixedly connected to one end of the electric push rod 6. A mounting hole is opened on one side of the mounting plate 3. A threaded rod 4 is threadedly connected to the mounting plate 3. An arc-shaped limiting block 5 is rotatably connected to one end of the threaded rod 4.

[0026] The locking block 11 can be used to assist in the installation of the guide block 2 on one side of the protective shell 13 and the protective shell 2 16. The support rod 8 can be used to guide the installation and removal of the guide block 2. The support rod 8 can be used to connect the auxiliary ring 1 and the guide block 2. The auxiliary ring 1 is easy to remove the top of the syringe 17. The guide block 2 can be used to support the top of the electric push rod 6. The electric push rod 6 can be used to adjust the height of the mounting plate 3 so that the bottom of the adjusted mounting plate 3 fits against the top of the gas chromatograph, which facilitates the fixing of the mounting plate 3 to the gas chromatograph. The threaded rod 4 can be used to adjust the distance between the arc-shaped limiting block 5 and the mounting plate 3.

[0027] The usage and working principle of this device are as follows: First, place the entire device above the gas chromatograph's injection port and insert the protective sleeve 10 into the injection port. Then, use the electric push rod 6 to drive the mounting plate 3 downwards, so that the bottom of the mounting plate 3 overlaps with the top of the gas chromatograph. Next, connect the mounting plate 3 and the gas chromatograph with bolts. At this time, rotate the threaded rod 4 so that one side of the arc-shaped limiting block 5 fits against the injection port. Then, rotate the protective sleeve 10 upwards until the top of the protective sleeve 10 overlaps with the limiting ring 9, pushing the injection rod 20. The bottom of the injection rod 20 slides inside the needle tube 17, allowing the sample to be delivered into the gas chromatograph for detection. This effectively prevents the injection needle from being damaged during daily operation and instrument maintenance. In addition to physical damage such as collisions and bending during transportation, it is ensured that the normal injection action of the injection needle and the overall operation of the instrument are not affected. When it is necessary to disassemble the installation structure, the guide block 2 is moved away from the locking block 11, so that the end of the guide block 2 is separated from the locking block 11 and the bottom of the support rod 8 is separated from the guide block 2. The guide block 2, the electric push rod 6 and the mounting plate 3 can be removed from the needle tube 17 side. Alternatively, the protective sleeve 10 can be separated from the protective shell 13 and the protective shell 2 16. Then, the protective shell 13 and the protective shell 2 16 can be separated, the needle tube 17 can be taken out, and the injection needle structure formed by the needle tube 17, the needle 14 and the injection rod 20 can be used alone.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A gas chromatograph injection needle protection mechanism comprising a needle tube (17) having a supplementary member (7) fixedly connected to one end of the needle tube (17), characterized in that: The auxiliary component (7) is provided with a protective assembly on one side. The protective assembly includes a protective sleeve (10), a second protective shell (16), and a first buffer (18). The second protective shell (16) is fitted with a first protective shell (13) on one side. The inner walls of the first protective shell (13) and the second protective shell (16) are fixedly connected to the first buffer (18). The second protective shell (16) is fixedly connected to a second buffer (19) on one side. The second buffer (19) is provided with two limiting rings (9). The inner walls of the two limiting rings (9) are fixedly connected to the first protective shell (13) and the second protective shell (16) respectively. The first protective shell (13) and the second protective shell (16) are connected to the protective sleeve (10) by threads. One end of the first protective shell (13) and the second protective shell (16) is slidably connected to a guide ring (15). The inner ring surface of the guide ring (15) is fixedly connected to the auxiliary component (7).

2. The gas chromatograph injection needle guard mechanism of claim 1, wherein: The top of the auxiliary component (7) is fixedly connected to a buffer sleeve (12), and an injection rod (20) is inserted through the buffer sleeve (12) and the auxiliary component (7). The injection rod (20) is slidably connected to the buffer sleeve (12).

3. The gas chromatograph injection needle guard mechanism of claim 2, wherein: One end of the injection rod (20) is slidably connected to the needle tube (17), and a needle (14) is installed at one end of the needle tube (17).

4. The gas chromatograph injection needle guard mechanism of claim 1, wherein: A locking block (11) is fixedly connected to one side of the first protective shell (13) and the second protective shell (16), and a guide block (2) is inserted into one side of the locking block (11).

5. The sample needle guard mechanism of a gas chromatograph according to claim 4, wherein: The top of the guide block (2) is slidably connected to a support rod (8), and the top of the support rod (8) is fixedly connected to an auxiliary ring (1), and one side of the auxiliary ring (1) is fixedly connected to an auxiliary component (7).

6. The sample needle guard mechanism of a gas chromatograph according to claim 5, wherein: The bottom of the guide block (2) is fixedly connected to an electric push rod (6), and one end of the electric push rod (6) is fixedly connected to a mounting plate (3). The mounting plate (3) has a mounting hole on one side.

7. The sample needle guard mechanism of a gas chromatograph according to claim 6, wherein: The mounting plate (3) is connected to a threaded rod (4) by a thread, and one end of the threaded rod (4) is rotatably connected to an arc-shaped limiting block (5).

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