Sealing clamping sleeve for sample inlet of gas chromatograph

Abstract

The utility model relates to the technical field of gas chromatograph sample injection port sealing clamping sleeves, in particular to a gas chromatograph sample injection port sealing clamping sleeve which comprises a base and a pressing plate, an installation block is arranged on the base, a fixing groove is formed in the installation block, a fixing rod is arranged on the pressing plate, and the fixing rod is arranged on the base. In the working process, the fixing rod component and the fixing groove component are matched with each other, so that the position between the pressing plate component and the base component is fixed and limited, the compatibility of the device is high, the universality and interchangeability of the product are enhanced, the production efficiency is improved, and the production cost is reduced. The position of the fixing rod is limited through mutual cooperation of the first spring, the limiting block and the fixing ring, limitation of the limiting block on the fixing rod is relieved through mutual cooperation of the fixing rod components and pressing of the fixing rod to move, and the effect of conveniently relieving fixation is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of a gas chromatograph sample inlet sealing sleeve. BACKGROUND

[0002] In gas chromatographic analysis, carrier gas is an important medium for bringing the sample into the chromatographic column, such as helium, nitrogen and the like. The sealing sleeve can be tightly attached around the sample inlet and the sample needle, so as to ensure that the carrier gas can only flow along the predetermined path and cannot leak out of the sample inlet. If the carrier gas leaks, the gas flow rate in the chromatographic column will be unstable, which will affect the separation effect of the sample and the accuracy of the analysis result.

[0003] Through retrieval, the gas chromatograph sample inlet sealing sleeve disclosed in Chinese Patent No. CN219957483U realizes the pressing and fixing of the pressing plate on the sample inlet assembly through the clamping of the clamping rod and the clamping groove, and the clamping rod and the clamping groove are caused to fall off by pressing the pressing rod, so as to avoid the use of special wrenches for disassembly, prevent the force of the wrench from being slightly excessive to cause damage to the glass tube in the sample inlet, and improve the disassembly efficiency.

[0004] With regard to the related technology in the above, the inventors have found that the following defects exist: in the prior art, the connection is achieved through clamping, and the size and shape of the clasp need to be accurately matched with the connecting components, otherwise the clasp may not be normally buckled or buckled tightly, which limits the universality and compatibility of the product. The clasp type components of different brands or models are often difficult to be used universally, and the application is provided to solve the problem of limited universality and compatibility in the prior art. The connection is achieved in a plug-in manner by matching the fixed rod with the fixed groove, so that the connection and separation are rapid through the simple and direct operation of plugging in and unplugging out, and the mutual compatibility is strong, thereby enhancing the universality and interchangeability of the product. CONTENT OF THE UTILITY MODEL

[0005] In order to enhance the universality and interchangeability of the product, the application provides a gas chromatograph sample inlet sealing sleeve.

[0006] The gas chromatograph sample inlet sealing sleeve provided by the application adopts the following technical scheme: a base and a pressing plate are provided, the base is provided with a mounting block, the mounting block is provided with a fixed groove, the pressing plate is provided with a fixed rod, a limiting assembly is arranged between one end of the fixed rod and the mounting block, and an elastic assembly is arranged between the other end of the fixed rod and the pressing plate.

[0007] Optionally, the limiting assembly comprises a fixed ring, the fixed ring is mounted on the fixed rod, a sliding plate is slidably arranged on the fixed rod at one side of the fixed ring, and the side of the sliding plate away from the fixed ring is chamfered.

[0008] Optionally, the limiting assembly further comprises a limiting block, the limiting block is slidingly installed on the mounting block, a telescopic rod is arranged between the limiting block and the mounting block, and a spring one is arranged on the telescopic rod.

[0009] Optionally, a protrusion is arranged on one side of the sliding plate close to the fixing ring, a groove is arranged on the fixing ring at a corresponding position of the protrusion, the protrusion is inserted into the groove, a vertical rod is installed on the sliding plate, a guide groove is arranged on the fixing rod, and the vertical rod is slidingly arranged in the guide groove.

[0010] Optionally, the elastic assembly comprises a spring two, the spring two is sleeved on the fixing rod, one end of the spring two is installed on the mounting block, and the other end of the spring two is installed on the fixing rod.

[0011] Optionally, a supporting rod is installed on the base, a pressing block is rotatably installed on the supporting rod, and the supporting rod and the pressing block pass through the pressing plate.

[0012] Optionally, a fixing bolt is arranged between the mounting block and the base, the fixing bolt is threadedly connected with the mounting block and the base, the mounting block and the base are slidingly arranged, and the two ends of the mounting block are arranged in an "E" shape.

[0013] In summary, the present application has the following beneficial technical effects:

[0014] 1. The utility model discloses a fixing rod, a fixing ring, a sliding plate, a limiting block and a spring one are arranged, the fixing rod part and the groove part are matched with each other in the working process, thereby the position between the pressing plate part and the base part is fixed and limited, the device is compatible, the universality and interchangeability of the product are enhanced, the limiting block and the fixing ring are matched with each other through the spring one, thereby the position of the fixing rod is limited, the fixing rod is pressed and moves through the mutual cooperation between the fixing rod part and the fixing rod part, thereby the limitation of the fixing rod by the limiting block is removed, and the effect that the fixing is conveniently removed is achieved.

[0015] 2. The utility model discloses a vertical rod, a guide groove, a protrusion, a groove, a supporting rod and a pressing block are arranged, the protrusion part and the groove are matched with each other in the working process, thereby the sliding plate and the fixing ring are connected, the limiting block can be smoothly transferred from the sliding plate to the fixing ring, the moving direction of the sliding plate is guided through the mutual cooperation between the vertical rod part and the guide groove, the connection between the sliding plate part and the fixing ring is prevented from being influenced by the rotation of the sliding plate part, and the connection stability between the pressing plate and the base is improved through the mutual cooperation between the supporting rod part and the pressing block part. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0017] Figure 2 This is an exploded view of an embodiment of this application;

[0018] Figure 3 This is a cross-sectional view of the mounting block in an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of the skateboard structure in an embodiment of this application.

[0020] Reference numerals in the attached diagram: 1. Base; 2. Pressure plate; 3. Mounting block; 4. Fixing rod; 5. Fixing groove; 6. Fixing ring; 7. Slide plate; 8. Protrusion; 9. Groove; 10. Limiting block; 11. Spring 1; 12. Telescopic rod; 13. Vertical rod; 14. Guide groove; 15. Spring 2; 16. Support rod; 17. Pressure block; 18. Fixing bolt. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0022] This application discloses a sealing sleeve for the injection port of a gas chromatograph. For example... Figure 1 , Figure 2 As shown, the system includes a base 1 and a pressure plate 2. The gas chromatograph is installed in a designated position via the base 1, and the injection assembly is installed into the gas chromatograph injection port through a through hole on the base 1. The pressure plate 2 is then positioned directly above the base 1, pressing it against the injection assembly of the gas chromatograph. A support rod 16 is mounted on the base 1, and a pressure block 17 is rotatably mounted on the support rod 16. The support rod 16 and the pressure block 17 pass through the pressure plate 2. When the pressure plate 2 is installed onto the base 1, the support rod 16 and the pressure plate 2 pass through the base 1. Subsequently, the pressure plate 2 is rotated on the support rod 16, thereby restricting the position between the base 1 and the pressure plate 2.

[0023] In this embodiment, a mounting block 3 is provided on the base 1, and a fixing bolt 18 is provided between the mounting block 3 and the base 1. The fixing bolt 18 passes through the mounting block 3 and is threadedly connected to the base 1. The mounting block 3 and the base 1 are slidably disposed. The two ends of the mounting block 3 are set as "E" shape. By driving the fixing bolt 18 to rotate, the fixing bolt 18 can be removed from the mounting block 3, thereby enabling the mounting block 3 to be disassembled and replaced, thereby increasing the adaptability of the device.

[0024] like Figure 3As shown, the mounting block 3 is provided with a fixed slot 5, the fixed slot 5 is provided with a rubber pad on the inner side of the one end close to the edge of the base 1, the pressing plate 2 is provided with a fixed rod 4, the one end of the fixed rod 4 and the mounting block 3 are provided with a limiting assembly, the limiting assembly includes a fixed ring 6, the fixed ring 6 is installed on the fixed rod 4, the fixed rod 4 on the one side of the fixed ring 6 is slidably provided with a sliding plate 7, the one side of the sliding plate 7 away from the fixed ring 6 is chamfered, the fixed rod 4 is inserted into the fixed slot 5, thereby connecting the two ends of the pressing plate 2 with the base 1, thereby fixing the position of the pressing plate 2 and the base 1, the sliding plate 7 and the fixed ring 6 are automatically separated by the friction force between the rubber pad and the sliding plate 7 during installation.

[0025] Referring to Figure 4 As shown, the one side of the sliding plate 7 close to the fixed ring 6 is provided with a protruding block 8, the fixed ring 6 on the corresponding position of the protruding block 8 is provided with a groove 9, the protruding block 8 is inserted with the groove 9, the one end of the protruding block 8 close to the groove 9 is chamfered, the protruding block 8 is provided with multiple, the multiple protruding blocks 8 are uniformly distributed, and the gap is provided between the protruding block 8 and the groove 9.

[0026] Combined Figure 3 , Figure 4 As shown, the sliding plate 7 is installed with a vertical rod 13, the fixed rod 4 is provided with a guide slot 14, the vertical rod 13 is slidably provided with the guide slot 14, the sliding plate 7 drives the vertical rod 13 to move while moving on the fixed rod 4, the vertical rod 13 slides in the guide slot 14, and the moving direction of the sliding plate 7 is guided and limited through the guide slot 14.

[0027] Referring to Figure 3 As shown, the limiting assembly further includes a limiting block 10, the limiting block 10 is slidably installed on the mounting block 3, the one end of the limiting block 10 close to the fixed rod 4 is chamfered, the limiting block 10 and the mounting block 3 are connected through the telescopic rod 12, and the telescopic rod 12 is provided with a spring 11.

[0028] As shown in Figure 1 , Figure 2 As shown, the other end of the fixed rod 4 and the pressing plate 2 are provided with an elastic assembly, the elastic assembly includes a spring 15, the spring 15 is sleeved on the fixed rod 4, one end of the spring 15 is installed on the mounting block 3, and the other end of the spring 15 is installed on the fixed rod 4, the worker presses the fixed rod 4 to move at the same time, the fixed rod 4 drives the spring 15 to compress, when the worker releases the pressing of the fixed rod 4, the spring 15 releases the force to push the fixed rod 4 to move in the direction.

[0029] The implementation principle of the gas chromatograph sample inlet sealing sleeve is as follows: when installing, the pressing plate 2 is placed on the base 1, and the fixing rod 4 is aligned with the fixing groove 5, then the fixing rod 4 is pressed to move into the fixing groove 5, the fixing rod 4 drives the fixing ring 6 and the sliding plate 7 to move, with the movement of the fixing ring 6, the fixing ring 6 drives the limiting block 10 to move, the limiting block 10 drives the spring I 11 to compress, after the limiting block 10 passes the fixing ring 6, the spring I 11 drives the limiting block 10 to reset, thereby limiting the position of the fixing rod 4, preventing the fixing rod 4 from moving in a direction, when the pressing plate 2 needs to be disassembled, the fixing rod 4 is pressed again, the fixing rod 4 drives the fixing ring 6 and the sliding plate 7 to move again, then the sliding plate 7 drives the limiting block 10 to move and pass the sliding plate 7, when the fixing rod 4 moves to a preset position, the pressing on the fixing rod 4 is released, at this time, the spring II 15 drives the fixing rod 4 to reset, the fixing rod 4 drives the fixing ring 6 to move, at this time, the limiting block 10 blocks the movement of the sliding plate 7, so that the sliding plate 7 slides on the fixing rod 4, and the sliding plate 7 and the fixing ring 6 are connected through the cooperation of the convex block 8 and the recess 9, then the limiting block 10 passes the sliding plate 7 and the fixing ring 6, thereby releasing the limitation on the fixing ring 6.

[0030] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A gas chromatograph inlet seal ferrule comprising a base (1), a pressure plate (2), characterised in that: The base (1) is provided with a mounting block (3), the mounting block (3) is provided with a fixed groove (5), the pressing plate (2) is provided with a fixed rod (4), one end of the fixed rod (4) and the mounting block (3) are provided with a limiting assembly, the other end of the fixed rod (4) and the pressing plate (2) are provided with an elastic assembly.

2. A gas chromatograph inlet seal ferrule as defined in claim 1, wherein: The limiting assembly includes a fixed ring (6), the fixed ring (6) is installed on the fixed rod (4), the fixed rod (4) on one side of the fixed ring (6) is slidably provided with a sliding plate (7), and the side of the sliding plate (7) away from the fixed ring (6) is chamfered.

3. A gas chromatograph inlet seal ferrule as defined in claim 2, wherein: The limiting assembly further includes a limiting block (10), the limiting block (10) is slidably installed on the mounting block (3), and the limiting block (10) and the mounting block (3) are connected through a telescopic rod (12). The telescopic rod (12) is provided with a spring (11).

4. A gas chromatograph inlet seal ferrule as defined in claim 2, wherein: The side of the sliding plate (7) close to the fixed ring (6) is provided with a protruding block (8), the fixed ring (6) on the corresponding position of the protruding block (8) is provided with a groove (9), the protruding block (8) and the groove (9) are inserted, the sliding plate (7) is provided with a vertical rod (13), the fixed rod (4) is provided with a guide groove (14), and the vertical rod (13) and the guide groove (14) are slidably arranged.

5. A gas chromatograph inlet seal ferrule as defined in claim 1, wherein: The elastic assembly includes a spring (15), the spring (15) is sleeved on the fixed rod (4), one end of the spring (15) is installed on the mounting block (3), and the other end of the spring (15) is installed on the fixed rod (4).

6. A gas chromatograph inlet seal ferrule as defined in claim 1, wherein: The base (1) is provided with a supporting rod (16), the supporting rod (16) is rotatably provided with a pressing block (17), and the supporting rod (16) and the pressing block (17) pass through the pressing plate (2).

7. A gas chromatograph inlet seal ferrule as defined in claim 1, wherein: The mounting block (3) and the base (1) are provided with a fixed bolt (18), the fixed bolt (18) passes through the mounting block (3) and is threadedly connected with the base (1), the mounting block (3) and the base (1) are slidably arranged, and the two ends of the mounting block (3) are provided with an "E" shape.

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