Sealing and connecting device for sample inlet of analytical instrument

Abstract

The utility model relates to the technical field of sealing connection, and discloses an analytical instrument sample inlet sealing connection device which comprises a fixing block, the left side and the right side of the middle of the fixing block are in threaded connection with second nuts, the front ends of the second nuts are in threaded connection with second bolts, and the upper portions and the lower portions of the left side and the right side of the front end and the rear end of the fixing block are fixedly connected with buckles. Clamping caps are clamped to the front end and the rear end of the buckle, fixing plates penetrate through the front end and the rear end of each clamping cap, a first threaded pipe is in threaded connection with the interior of the fixing block, a third fixing ring is installed at the bottom end of the first threaded pipe, and a connecting mechanism is installed at the bottom end of the fixing block. According to the utility model, because the problem that the connecting devices are incompatible when instruments of different brands are combined or connected, the fixing block is provided with the nut II, the bolt II, the buckle, the clamping cap and the fixing plate, so that the size and the shape of the fixing block can be adjusted according to the instruments of different sizes.

Description

Technical Field

[0001] This utility model relates to the field of sealing connection technology, and in particular to a sealing connection device for the sample inlet of an analytical instrument. Background Technology

[0002] Analytical instruments are a class of instruments and equipment used to analyze the composition, structure, properties, and laws governing changes of substances. Their main structures include sample introduction systems, separation and enrichment systems, detection systems, and signal processing and control systems. They are widely used in the structural identification, purity analysis, and reaction mechanism research of compounds. In drug development, they are used for drug component analysis and pharmacokinetics research. In clinical diagnosis, they can detect various components in biological samples such as blood and urine, such as blood glucose, blood lipids, and proteins, to help doctors diagnose diseases.

[0003] The injection port sealing connection device is a key component in analytical instruments used to connect the injection system to the instrument body and ensure the system's tightness during injection. Different types of injection port sealing connection devices have different structures, but all include sealing elements and connecting parts. A gland-type sealing connection device consists of a gland and a sealing gasket; a diaphragm-type sealing connection device includes a diaphragm and related fixing parts; and a ferrule-type sealing connection device includes a ferrule, a sealing ring, and a fastening nut. The current analytical instrument market offers numerous brands and models, and different brands of instruments differ in the size, shape, and specifications of their connection interfaces. This leads to incompatibility issues when connecting or using instruments from different brands. Furthermore, the design of the connection device makes disassembly and installation complex, requiring special tools or professional skills. This not only increases the difficulty of maintenance but also risks damaging the connection device or instrument components during disassembly. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a sealing connection device for the sample inlet of analytical instruments. It aims to improve the existing technology where different brands of instruments have different sizes, shapes, and specifications of connection interfaces. This leads to incompatibility issues when connecting or using instruments of different brands together. Moreover, the design of the connection device makes the disassembly and installation process more complicated, requiring the use of special tools or professional skills. This not only increases the difficulty of maintenance but also causes damage to the connection device or instrument components during disassembly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sealing connection device for the sample inlet of an analytical instrument, comprising a fixing block, wherein two nuts are threadedly connected to the left and right sides of the middle of the fixing block, two bolts are threadedly connected to the front end of each of the two nuts, and buckles are fixedly connected to the front and rear ends, left and right sides, upper and lower parts of the fixing block, and buckles are engaged with caps at the front and rear ends, and fixing plates penetrate the front and rear ends of the caps. A threaded tube is threadedly connected inside the fixing block, and a fixing ring is installed at the bottom end of the threaded tube. A connecting mechanism is installed at the bottom end of the fixing block, and the connecting mechanism is mainly used for easy disassembly and cleaning of the equipment after use.

[0006] As a further description of the above technical solution:

[0007] The connecting mechanism includes a cylinder, which is installed at the bottom end of a threaded tube. A fixing ring is installed in the middle of the outer wall of the cylinder. Slider blocks are fixedly connected to the upper part of the outer wall of the cylinder. A sliding groove is opened inside the bottom end of the threaded tube, and the slider is slidably connected to the sliding groove. A fixing shaft is threadedly connected to the outer wall of the end of the threaded tube. A fixing ring is fixedly connected to the lower part of the outer wall of the fixing shaft. Nuts are threadedly connected to the inner circumference of the fixing ring. Bolts are threadedly connected to the end of each nut. The fixing ring is threadedly connected to the fixing ring through nuts. A retaining groove is opened in the lower part of the inner wall of the threaded tube. A rubber ring is installed at the top of the retaining groove. A washer is installed at the bottom end of the fixing ring.

[0008] As a further description of the above technical solution:

[0009] A liner is installed at the bottom center of the fixing block, a diaphragm one is fixedly connected to the upper part of the inner wall of the liner, a diaphragm two is fixedly connected to the inner wall of the liner, and a diaphragm three is installed at the bottom center of the fixing ring three.

[0010] As a further description of the above technical solution:

[0011] A fixing ring three is installed at the bottom of the fixing block, and anti-slip pads two are fixedly connected to the outer walls of the fixing ring three.

[0012] As a further description of the above technical solution:

[0013] A second shim is installed at the bottom end of the fixing block, and a first shim is installed at the bottom end of the fixing block.

[0014] As a further description of the above technical solution:

[0015] The bottom center of the fixed ring three is fixedly connected to the threaded tube two, and the outer wall of the threaded tube two is threadedly connected to the connector. The bottom outer side of the fixed block is equipped with an anti-slip pad one.

[0016] As a further description of the above technical solution:

[0017] A sealing washer is installed at the bottom center of the fixed ring three, and a post nut is threadedly connected to the bottom end of the sealing washer.

[0018] As a further description of the above technical solution:

[0019] An expansion groove is provided in the upper middle part of the threaded tube, and a rubber pad is installed inside the threaded tube.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, because the connection devices may be incompatible when instruments of different brands are used together or connected, the fixing block has two nuts, two bolts, a buckle, a cap, and a fixing plate. Therefore, the size and shape of the fixing block can be adjusted for instruments of different sizes.

[0022] 2. In this utility model, because the design of the connecting device makes the disassembly and installation process more complicated, there is a slider at the top of the cylinder, and there is a sliding groove and a slot in the lower part of the inner wall of the threaded tube. When the slider enters the inside of the threaded tube through the sliding groove and can rotate, it means that it has been fully entered. Then, after adjustment, the slider enters the slot and is finally fixed by the rubber ring. This makes it convenient to install and disassemble. Attached Figure Description

[0023] Figure 1 This is a front view of the analytical instrument inlet sealing connection device proposed in this utility model;

[0024] Figure 2 This is a perspective view of the analytical instrument inlet sealing connection device proposed in this utility model;

[0025] Figure 3 This is a cross-sectional view of the analytical instrument inlet sealing connection device proposed in this utility model;

[0026] Figure 4 This is a partial structural exploded view of the analytical instrument inlet sealing connection device proposed in this utility model;

[0027] Figure 5 This is a partial structural schematic diagram of the analytical instrument inlet sealing connection device proposed in this utility model.

[0028] Legend:

[0029] 1. Fixing block; 2. Connecting mechanism; 201. Cylinder; 202. Fixing ring one; 203. Slider; 204. Slide groove; 205. Slot; 206. Fixing ring two; 207. Bolt one; 208. Nut one; 209. Rubber ring; 210. Washer three; 211. Fixing shaft; 3. Nut two; 4. Threaded tube one; 5. Cap; 6. Anti-slip pad one; 7. Anti-slip pad two; 8. Washer one; 9. Connector; 10. Column nut; 11. Washer two; 12. Bolt two; 13. Expansion groove; 14. Rubber pad; 15. Buckle; 16. Fixing ring three; 17. Diaphragm one; 18. Liner tube; 19. Diaphragm two; 20. Threaded tube two; 21. Sealing washer; 22. Diaphragm three; 23. Fixing plate. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 2 and Figure 4 This utility model provides an embodiment of an analytical instrument inlet sealing connection device, comprising a fixing block 1, with nuts 3 threadedly connected to the left and right sides of the middle of the fixing block 1, bolts 12 threadedly connected to the front ends of the nuts 3, buckles 15 fixedly connected to the front and rear ends of the fixing block 1, caps 5 engaged at the front and rear ends of the buckles 15, and fixing plates 23 penetrating the front and rear ends of the caps 5, and a threaded tube 4 threadedly connected inside the fixing block 1, with the bottom end of the threaded tube 4 fitted with a threaded tube 4. The device is equipped with a fixing ring 16, and a connecting mechanism 2 is installed at the bottom of the fixing block 1. The connecting mechanism 2 is mainly used for easy disassembly and cleaning after the equipment is used. A liner 18 is installed in the middle of the bottom of the fixing block 1. A diaphragm 17 is fixedly connected to the upper middle part of the inner wall of the liner 18. A diaphragm 29 is fixedly connected to the middle of the inner wall of the liner 18. A diaphragm 22 is installed in the middle of the bottom of the fixing ring 16. An expansion groove 13 is opened in the upper middle part of the threaded tube 4. A rubber pad 14 is installed inside the threaded tube 4.

[0032] Specifically, the analytical instrument's sample inlet sealing connection device includes a fixing block 1, with nuts 2 3 and bolts 2 12 on its left and right sides, and buckles 15 at the front and rear ends. Buckles 15 engage with caps 5, which penetrate the fixing plate 23. The fixing block 1 contains a threaded tube 1 4, with a fixing ring 3 16 at the bottom end. The bottom end of the fixing block 1 has a connecting mechanism 2 for easy disassembly and cleaning of the equipment. The bottom middle part has a liner 18, with diaphragms 1 17 and 2 19 in the upper and middle parts of the inner wall of the liner 18. The bottom middle part of the fixing ring 3 16 has a diaphragm 3 22. The upper middle part of the threaded tube 1 4 has an expansion groove 13, with a rubber pad 14 inside.

[0033] Reference Figure 1 and Figure 5 The connecting mechanism 2 includes a cylinder 201, which is installed at the bottom end of the threaded tube 4. A fixing ring 202 is installed in the middle of the outer wall of the cylinder 201. Slider blocks 203 are fixedly connected to the upper part of the outer wall of the cylinder 201. A groove 204 is opened inside the bottom end of the threaded tube 4, and the slider 203 is slidably connected to the groove 204. A fixing shaft 211 is threadedly connected to the outer wall of the end of the threaded tube 4. A fixing ring 206 is fixedly connected to the lower part of the outer wall of the fixing shaft 211. Nuts 208 are threadedly connected to the inner circumference of the fixing ring 206. All ends are threaded with bolt 207. Fixing ring 206 and fixing ring 202 are threaded together by nut 208. The inner wall of threaded tube 4 is provided with grooves 205 around the lower part. Rubber ring 209 is installed at the top of groove 205. Washer 3 210 is installed at the bottom of fixing ring 206. Washer 2 11 is installed at the bottom of fixing block 1. Washer 1 8 is installed at the bottom of fixing block 1. Threaded tube 20 is fixedly connected to the middle of the bottom of fixing ring 3 16. Connector 9 is threaded to the outer wall of threaded tube 20. Anti-slip pad 6 is installed on the outer side of the bottom of fixing block 1.

[0034] Specifically, in the analytical instrument's sample inlet sealing connection device, the connecting mechanism 2 includes a cylinder 201, installed at the bottom end of the threaded tube 4. A fixing ring 202 is located in the middle of the outer wall of the cylinder 201, and sliders 203 are located around its upper part. A groove 204 is located inside the bottom end of the threaded tube 4, and sliders 203 are connected to the groove 204. A fixing shaft 211 is connected to the outer wall of the end of the threaded tube 4. A fixing ring 206 is located in the lower middle part of the outer wall of the fixing shaft 211, and nuts 208 are located around the inside of the fixing ring 206. Nut 208 has a bolt 207 at its end. Fixing ring 206 is connected to fixing ring 202 via nut 208. The lower part of the inner wall of threaded tube 4 has a groove 205 around its perimeter. The top of groove 205 has a rubber ring 209. The bottom of fixing ring 206 has a washer 210. The bottom of fixing block 1 has washer 11 and washer 8. The middle part of the bottom of fixing ring 16 has threaded tube 20. The outer wall of threaded tube 20 is connected to a connector 9. The outer side of the bottom of fixing block 1 has an anti-slip pad 6.

[0035] Reference Figure 3 A fixing ring 16 is installed at the bottom of the fixing block 1. Anti-slip pads 7 are fixedly connected to the outer walls of the fixing ring 16. A sealing washer 21 is installed in the middle of the bottom of the fixing ring 16. A post nut 10 is threaded to the bottom of the sealing washer 21.

[0036] Specifically, the outer wall of the fixing ring 16 is connected with anti-slip pads 2 7, and a sealing washer 21 is installed at the bottom center. The bottom end of the sealing washer 21 is also connected with a post nut 10.

[0037] Working principle: When sealing the injection port, first loosen the bolts 12 on the left and right sides of the front end of the fixing block 1. Nuts 3 are located on the left and right sides of the middle of the fixing block 1. Then, separate the fixing block 1 and align it with the injection port for connection. A threaded tube 4 is connected inside the fixing block 1, and a rubber gasket 14 is installed inside the threaded tube 4. An expansion groove 13 is located in the upper middle part of the threaded tube 4. Therefore, if the size of the connection port is different, the expansion groove 13 can be opened or closed outwards or inwards for better fixation. Clips 15 are fixed to the upper middle part of the left and right sides of the front and rear ends of the fixing block 1. Fixing plates 23 are installed at the front and rear ends of the clips 15. If the injection port is not circular, fixing plates 23 can be installed. Each end has a cap 5, which is fixed to the fixing plate 23 for easy disassembly. There is a liner 18 at the bottom middle of the threaded tube 4. A diaphragm 17 is fixed in the upper middle of the inner wall of the liner 18, and a diaphragm 29 is fixed in the middle of the inner wall. When injecting the sample, the needle hole passes through the diaphragm 29 and the diaphragm 17 to prevent impurities in the air from entering the interior. There is a gasket 21 at the bottom of the fixing block 1. There is a fixing ring 3 16 in the middle of the outer wall of the liner 18. There is an anti-slip pad 2 7 on the outer wall of the fixing ring 3 16. There is a gasket 18 at the bottom of the fixing ring 3 16. There is a threaded tube 20 in the middle of the bottom of the fixing ring 3 16. A connector 9 is connected to the outside. There is a sealing washer 21 in the middle of the bottom of the connector 9. A post nut 10 is connected to the outside. A diaphragm 3 22 is fixed in the lower middle of the inner wall of the sealing washer 21.

[0038] A fixed shaft 211 is connected to the lower part of the outer wall of the threaded tube 4. A fixing ring 206 is fixed to the lower part of the outer wall of the fixed shaft 211. Anti-slip pads 6 are provided around the outer wall. Nuts 208 are connected to the inner circumference of the fixing ring 206. Bolts 207 are provided at the bottom of the outer wall of each nut 208. A sliding groove 204 and a retaining groove 205 are provided around the lower part of the inner wall of the threaded tube 4. A rubber ring 209 is provided at the top of the sliding groove 204. A cylinder 201 is provided at the bottom of the sliding groove 204. The outer wall of the cylinder 201... The upper middle part has a slider 203. When connecting, the slider 203 is aligned with the groove 204. After the cylinder 201 enters the threaded tube 4 through the groove 204, the cylinder 201 is rotated so that the slider 203 stops above the slot 205. Then the cylinder 201 is pulled down so that the slider 203 is inserted into the slot 205. The rubber ring 209 inside can hold the slider 203 in place. There is a gasket 210 between the fixing ring 202 and the fixing ring 206 to reduce the loosening of the object.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing connection device for the sample inlet of an analytical instrument, comprising a fixing block (1), characterized in that: The middle left and right sides of the fixing block (1) are threaded with nuts two (3), and the front end of the nuts two (3) is threaded with bolts two (12). The front and rear ends of the fixing block (1) are fixedly connected with buckles (15) on the left and right sides and the upper and lower parts. The front and rear ends of the buckles (15) are engaged with caps (5). The front and rear ends of the caps (5) are penetrated by fixing plates (23). The inside of the fixing block (1) is threaded with a threaded tube one (4). The bottom end of the threaded tube one (4) is equipped with a fixing ring three (16). The bottom end of the fixing block (1) is equipped with a connecting mechanism (2). The connecting mechanism (2) is mainly used for easy disassembly and cleaning after the equipment is used.

2. The analytical instrument inlet sealing connection device according to claim 1, characterized in that: The connecting mechanism (2) includes a cylinder (201), which is installed at the bottom end of the threaded tube (4). A fixing ring (202) is installed in the middle of the outer wall of the cylinder (201). Slider blocks (203) are fixedly connected to the upper and middle parts of the outer wall of the cylinder (201). A groove (204) is opened inside the bottom end of the threaded tube (4). The slider (203) is slidably connected to the groove (204). A fixed shaft (211) is threadedly connected to the outer wall of the end of the threaded tube (4). The lower part of the outer wall of the fixed shaft (211) is connected to the groove. The first part is fixedly connected to a second fixing ring (206). The second fixing ring (206) is threaded with nuts (208) on all four sides of its interior. The first nuts (208) are threaded with bolts (207) at their ends. The second fixing ring (206) and the first fixing ring (202) are threadedly connected by nuts (208). The lower part of the inner wall of the first threaded tube (4) is provided with slots (205) on all four sides. A rubber ring (209) is installed at the top of the slots (205). A washer (210) is installed at the bottom of the second fixing ring (206).

3. The analytical instrument inlet sealing connection device according to claim 1, characterized in that: A liner (18) is installed at the middle of the bottom end of the fixing block (1). A diaphragm (17) is fixedly connected to the upper middle part of the inner wall of the liner (18). A diaphragm (29) is fixedly connected to the middle of the inner wall of the liner (18). A diaphragm (22) is installed at the middle of the bottom end of the fixing ring (16).

4. The analytical instrument inlet sealing connection device according to claim 1, characterized in that: The bottom end of the fixing block (1) is equipped with a fixing ring three (16), and the outer walls of the fixing ring three (16) are all fixedly connected with anti-slip pads two (7).

5. The analytical instrument inlet sealing connection device according to claim 1, characterized in that: The bottom end of the fixing block (1) is equipped with a second gasket (11) and the bottom end of the fixing block (1) is equipped with a first gasket (8).

6. The analytical instrument inlet sealing connection device according to claim 1, characterized in that: The bottom middle of the fixed ring three (16) is fixedly connected to the threaded pipe two (20), and the outer wall of the threaded pipe two (20) is threadedly connected to the connector (9). The bottom outer side of the fixed block (1) is equipped with an anti-slip pad one (6).

7. The analytical instrument inlet sealing connection device according to claim 1, characterized in that: A sealing washer (21) is installed at the bottom center of the fixed ring three (16), and a post nut (10) is threaded to the bottom end of the sealing washer (21).

8. The analytical instrument inlet sealing connection device according to claim 1, characterized in that: An expansion groove (13) is provided in the upper middle part of the threaded tube (4), and a rubber pad (14) is installed inside the threaded tube (4).

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