Sample tube sealing connection device and system

Abstract

The utility model relates to a sample tube sealing and connecting device and system in the technical field of analysis and detection. The sample tube sealing and connecting device comprises at least one power device, at least one connector, at least one first sealing unit and at least one testing head, the power device is connected with the connector, the first sealing unit is arranged between the connector and the testing head, the connector and the testing head are connected in a sealing mode, and the connector is provided with a connecting port connected with the testing host. According to the utility model, the power device and the connector are additionally arranged on the conventional testing head, the connecting port used for connecting the testing host on the testing head is rotatably arranged on the connector, and the power device applies pressure to the connector, so that the first sealing unit is extruded to realize automatic sealing between the connector and the testing head; various defects of a conventional testing head, such as incapability of realizing automation, are overcome; the automatic sample loading and unloading device can provide a new implementation way for automatically installing and unloading the samples, while the automatic sample loading and unloading device can be used for automatically loading and unloading the samples.

Description

Technical Field

[0001] The utility model relates to the technical field of analysis and detection, in particular to a sample tube sealing connection device and system. Background Art

[0002] In the field of analytical detection technology, physical adsorption and chemical adsorption tests can characterize the specific surface area, pore structure, adsorption or separation performance, chemical activity, acidity and alkalinity, redox properties, etc. of materials. This type of instrument usually consists of two parts: a test unit and a pretreatment unit, both of which require manual connection and sealing with the sample tube. In the test process, the sample tube containing the sample needs to be connected and sealed with the pretreatment unit first, and then it needs to be transferred to the test unit, and it still needs to be connected and sealed. However, due to the influence of the connection and sealing method, it is currently basically operated manually. During manual operation, most of them place the sealing ring, sealing block, and outer nut from top to bottom, and pass the upper end of the test tube upward through the outer nut, sealing block, and sealing ring. The tester rotates the outer nut by hand or with the help of tools such as a wrench or a screwdriver to make its inner thread twisted with the outer thread of the instrument host, thereby rotating and driving the sealing block to press the sealing ring to achieve a sealed connection between the test tube and the test unit and the pretreatment unit. However, this process is currently difficult to automate and requires manual operation, resulting in a waste of a lot of manpower and material resources, and low efficiency. Summary of the invention

[0003] In order to solve the problem caused by a large amount of manual operation when transferring the sample tube from the pre-treatment unit to the test unit, the utility model discloses a sample tube sealing connection device and system. The technical solution of the utility model is implemented as follows:

[0004] A sample tube sealing connection device comprises at least one power device, at least one connection head, at least one first sealing unit and at least one test head;

[0005] The power device is connected to the connecting head, the first sealing unit is arranged between the connecting head and the test head, the connecting head and the test head are sealed and connected, at least one connecting port connected to the test host is arranged on the connecting head, and the test head and the connecting head are provided with gas through holes connected to the connecting port.

[0006] Preferably, the test head comprises at least one nut, at least one sealing block, at least one second sealing unit and at least one fixing portion;

[0007] The fixing portion is provided with a cavity for inserting the sealing block;

[0008] The bottom of the cavity is provided with a sealing groove for the second sealing unit to be embedded;

[0009] The sealing block is connected to the nut, and the sealing block is inserted into the cavity and contacts the second sealing unit.

[0010] Preferably, the lower structure of the connector and the upper structure of the fixed part are in contact and sealed with each other through the first sealing unit; the first sealing unit is embedded in the lower structure of the connector or the upper structure of the fixed part. For example, the lower structure of the connector can be set to be convex or provided with a groove, and the corresponding upper structure of the fixed part is provided with a groove or a corresponding convex, and the first sealing unit can be set on the end face or side of the convex or the bottom or inner surface of the groove, all for the purpose of achieving sealing.

[0011] Preferably, the fixing part is provided with a fixing device for connecting with the test host, for example, a magnetic adsorption device fixed to the test table of the test host or a fixing groove for being stuck in a fixing groove corresponding to the test host.

[0012] Preferably, the test head further comprises at least one self-sealing structure;

[0013] The self-sealing structure is arranged in the gas through hole of the fixing part.

[0014] Preferably, the self-sealing structure comprises a third sealing unit, a self-sealing block, an elastic body and a breathable block;

[0015] The self-sealing block includes a sliding column and a force-applying ring;

[0016] The force-applying ring is sleeved on the sliding column;

[0017] The air permeable block is fixed in the gas through hole of the fixed part, one end of the elastomer is connected to the air permeable block, and the other end is against the lower end of the force ring, the third sealing unit is arranged on the upper end surface of the force ring, and the upper end of the gas through hole of the fixed part is provided with a sliding area that allows the sliding column to pass through but does not allow the third sealing unit and the force ring to pass through, and the outer diameter of the upper end of the sliding column is larger than the inner diameter of the gas through hole of the connector.

[0018] Preferably, the self-sealing structure further comprises at least one force-bearing block;

[0019] The force-bearing block is arranged at the upper end of the sliding column, and the force-bearing block or the sliding column is provided with a channel communicating with the gas through hole of the connecting head.

[0020] Preferably, the power device is selected from one of a cylinder, a motor, and a hydraulic device, as long as it can achieve reciprocating movement over a certain distance.

[0021] A system of a sample tube sealing connection device comprises an automatic gripping device; the automatic gripping device is provided with a gripping part; the automatic gripping device completes the installation and unloading of automated sample tubes, etc.

[0022] Preferably, the automatic grasping device is a multi-axis robot or a robotic arm.

[0023] The utility model adds a power device and a connector to the conventional test head, and transfers the connection port on the test head for connecting the test host to the connector. The power device applies pressure to the connector, thereby squeezing the first sealing unit to achieve automatic sealing between the connector and the test head, solving various drawbacks of conventional test heads, such as the inability to achieve automation; requiring manual supervision of each step, etc. The utility model can provide a new way to achieve automatic sample installation and automatic sample unloading. At the same time, the self-sealing structure in the test head can well ensure that the sample in the sample tube will not come into contact with the atmosphere, preventing the atmosphere from entering and causing physical or chemical changes with the sample that affect the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 one embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0026] Figure 1 This is a schematic diagram of the structural disassembly of a sample tube sealing connection device embodiment 1;

[0027] Figure 2 It is a structural cross-sectional view of Example 1 of a sample tube sealing connection device;

[0028] Figure 3 This is a schematic diagram of the structural disassembly of a sample tube sealing connection device embodiment 2;

[0029] Figure 4 It is a structural cross-sectional view of Example 2 of a sample tube sealing connection device;

[0030] Figure 5 This is a schematic diagram of the structural disassembly of a sample tube sealing connection device embodiment 3;

[0031] Figure 6 It is a structural cross-sectional view of Example 3 of a sample tube sealing connection device;

[0032] Figure 7 is a cross-sectional view of a self-sealing block in Example 3 of a sample tube sealing connection device;

[0033] Figure 8 It is a structural schematic diagram of a system embodiment of a sample tube sealing connection device when used in conjunction with an adsorption host;

[0034] Fig. 9 The present invention is a structural schematic diagram of a fixing table in which a fixing groove is clamped on an adsorption host when a system embodiment of a sample tube sealing connection device is used in conjunction with an adsorption host.

[0035] In the above drawings, the figure numbers represent:

[0036] 1. Power device;

[0037] 2. Connector;

[0038] 3. The first sealing unit;

[0039] 4. Test head;

[0040] 4-1, nut;

[0041] 4-2, sealing block;

[0042] 4-3, second sealing unit;

[0043] 4-4, fixed part;

[0044] 4-5, self-sealing structure;

[0045] 4-5-1, the third sealing unit;

[0046] 4-5-2, self-sealing block;

[0047] 4-5-2-1, sliding column;

[0048] 4-5-2-2, force ring;

[0049] 4-5-3, elastomer;

[0050] 4-5-4, breathable block;

[0051] 4-5-5, load bearing block;

[0052] 5. Automatic grabbing device;

[0053] 5-1, grasping part;

[0054] 6. Sample tube. DETAILED DESCRIPTION

[0055] 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 of 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.

[0056] Example 1

[0057] In a specific embodiment 1, Figure 1 and Figure 2 As shown, a sample tube sealing connection device includes a power device 1, a connector 2, a first sealing unit 3 and a test head 4; the power device 1 is connected to the connector 2, the first sealing unit 3 is arranged between the connector 2 and the test head 4, the connector 2 and the test head 4 are sealed and connected, the connector 2 is provided with a connecting port connected to the test host, and the test head 4 and the connector 2 are provided with gas through holes connected to the connecting port.

[0058] The lower structure of the connector 2 and the upper structure of the fixing part 4-4 are in contact and sealed with each other through the first sealing unit 3. In this embodiment, the lower structure of the connector 2 is arranged in a convex shape, the upper structure of the fixing part 4-4 is provided with a corresponding groove, and the first sealing unit 3 is embedded in the lower end surface of the lower structure of the connector 2 (also in a convex shape).

[0059] In this embodiment, the test head 4 includes a nut 4-1, a sealing block 4-2, a second sealing unit 4-3 and a fixing portion 4-4;

[0060] The fixing portion 4-4 is provided with a cavity for inserting the sealing block 4-2;

[0061] The bottom of the cavity is provided with a sealing groove for the second sealing unit 4-3 to be embedded;

[0062] The sealing block 4-2 is connected to the nut 4-1, and the sealing block 4-2 is inserted into the cavity and contacts the second sealing unit 4-3.

[0063] The operation process of this embodiment is as follows:

[0064] The operator inserts the mouth of the sample tube 6 from the lower part of the test head 4 and fixes it with the sealing block 4-2. The mouth of the sample tube 6 contacts and finally passes through the second sealing unit 4-3. At the same time, the upper end of the sealing block 4-2 squeezes the second sealing unit 4-3, and the second sealing unit 4-3 is stretched under pressure and partially embedded in the bottom of the cavity, thereby achieving the sealing and fixation of the mouth of the sample tube 6 (the air at the lower end of the test head 4 is blocked by the stretched second sealing unit 4-3 and cannot enter the mouth); after fixing the sample tube 6, the power device 1 applies a downward force to the connector 2, and the first sealing unit 3 located at the bottom of the connector 2 is stretched under pressure to seal the connection between the connector 2 and the test head 4, thereby ensuring airtightness, and then the connector 2 is connected to the test host through the connecting port to start the test.

[0065] Example 2

[0066] In a specific embodiment 2, Figure 3 and Figure 4 As shown, a sample tube sealing connection device includes a power device 1, a connector 2, a first sealing unit 3 and a test head 4; the power device 1 is connected to the connector 2, the first sealing unit 3 is arranged between the connector 2 and the test head 4, the connector 2 and the test head 4 are sealed and connected, the connector 2 is provided with a connecting port connected to the test host, and the test head 4 and the connector 2 are provided with gas through holes connected to the connecting port.

[0067] The lower structure of the connector 2 and the upper structure of the fixed part 4-4 are in contact and sealed with each other through the first sealing unit 3. In this embodiment, the upper structure of the fixed part 4-4 is arranged in a convex shape, the lower structure of the connector 2 is provided with a corresponding groove, and the first sealing unit 3 is embedded in the side of the upper structure (also convex shape) of the fixed part 4-4.

[0068] In this embodiment, the test head 4 includes a nut 4-1, a sealing block 4-2, a second sealing unit 4-3 and a fixing portion 4-4;

[0069] The fixing portion 4-4 is provided with a cavity for inserting the sealing block 4-2;

[0070] The bottom of the cavity is provided with a sealing groove for the second sealing unit 4-3 to be embedded;

[0071] The sealing block 4-2 is connected to the nut 4-1, and the sealing block 4-2 is inserted into the cavity and contacts the second sealing unit 4-3.

[0072] The operation process of this embodiment is as follows:

[0073] The operator inserts the mouth of the sample tube 6 from the lower part of the test head 4 and fixes it with the sealing block 4-2. The mouth of the sample tube 6 contacts and finally passes through the second sealing unit 4-3. At the same time, the upper end of the sealing block 4-2 squeezes the second sealing unit 4-3. The second sealing unit 4-3 is stretched under pressure and partially embedded in the bottom of the cavity, thereby achieving the sealing and fixation of the mouth of the sample tube 6 (the air at the lower end of the test head 4 is blocked by the stretched second sealing unit 4-3 and cannot enter the mouth); after the sample tube 6 is fixed, the power device 1 applies a downward force to the connector 2, and the first sealing unit 3 located on the side of the fixing part 4-4 will stretch when moving, thereby sealing the connection between the connector 2 and the test head 4 to ensure airtightness, and then the connector 2 is connected to the test host through the connecting port to start the test.

[0074] Example 3

[0075] In a preferred embodiment 3, Figure 5 and Figure 6 As shown, a sample tube sealing connection device includes a power device 1, two connectors 2, two first sealing units 3 and two test heads 4; the power device 1 is connected to the two connectors 2, the first sealing unit 3 is arranged between the connector 2 and the test head 4, the connector 2 and the test head 4 are sealed and connected, the connector 2 is provided with a connecting port connected to the test host, and the test head 4 and the connector 2 are provided with gas through holes connected to the connecting port.

[0076] The lower structure of the connector 2 and the upper structure of the fixed part 4-4 are in contact and sealed with each other through the first sealing unit 3; in this embodiment, the upper structure of the fixed part 4-4 is set as a groove, and the lower structure of the connector 2 is set with a corresponding protrusion, and the first sealing unit 3 is embedded in the bottom surface of the upper structure of the fixed part 4-4 (also a groove).

[0077] In this embodiment, the test head 4 includes a nut 4-1, a sealing block 4-2, a second sealing unit 4-3 and a fixing portion 4-4;

[0078] The fixing portion 4-4 is provided with a cavity for inserting the sealing block 4-2;

[0079] The bottom of the cavity is provided with a sealing groove for the second sealing unit 4-3 to be embedded;

[0080] The sealing block 4-2 is connected to the nut 4-1, and the sealing block 4-2 is inserted into the cavity and contacts the second sealing unit 4-3.

[0081] In this embodiment, the test head 4 further includes a self-sealing structure 4-5;

[0082] The self-sealing structure 4-5 is disposed in the gas through hole of the fixing portion 4-4.

[0083] like Figure 7As shown, the self-sealing structure 4-5 includes a third sealing unit 4-5-1, a self-sealing block 4-5-2, an elastic body 4-5-3, a breathable block 4-5-4 and a force-bearing block 4-5-5;

[0084] The self-sealing block 4-5-2 includes a sliding column 4-5-2-1 and a force ring 4-5-2-2;

[0085] The force ring 4-5-2-2 is fixed on the sliding column 4-5-2-1;

[0086] The air permeable block 4-5-4 is fixed in the gas through hole of the fixed part 4-4, one end of the elastic body 4-5-3 is connected to the air permeable block 4-5-4, and the other end is against the lower end of the force ring 4-5-2-2, the third sealing unit 4-5-1 is arranged on the upper end face of the force ring 4-5-2-2, and the upper end of the gas through hole of the fixed part 4-4 is provided with a sliding area that allows the sliding column 4-5-2-1 to pass through but does not allow the third sealing unit 4-5-1 and the force ring 4-5-2-2 to pass through. The force block 4-5-5 is arranged at the upper end of the sliding column 4-5-2-1, and the end face of the force block 4-5-5 is provided with a channel connected to the gas through hole of the connector 2.

[0087] In this embodiment, the outer diameter of the force block 4-5-5 at the upper end of the sliding column 4-5-2-1 is larger than the inner diameter of the gas through hole of the connecting head 2, so that when the test head 4 is connected to the connecting head 2, the force block 4-5-5 at the upper end of the sliding column 4-5-2-1 will be pressed against by the lower end of the connecting head 2 and pressed downward, so that the sliding column 4-5-2-1 moves downward, and the elastomer 4-5-3 located on the lower surface of the force ring 4-5-2-2 is forced downward, and the force originally squeezing the third sealing unit 4-5-1 gradually decreases, and the third sealing unit 4-5-1 returns to its original state from the extended state, and no longer seals the gas channel at the upper end of the fixed part 4-4. The gas enters from the channel on the end face of the force block 4-5-5, and then enters the gas channel of the fixed part 4-4 from the edge of the force ring 4-5-2-2, and finally enters the sample tube 6.

[0088] The operation process of this embodiment is as follows:

[0089] The upper end of the sample tube 6 is passed upward through the channel at the lower end of the nut 4-1, the channel inside the sealing block 4-2, and the second sealing unit 4-3 in sequence. At the same time, the upper end of the sealing block 4-2 squeezes the second sealing unit 4-3, and the second sealing unit 4-3 is stretched under pressure and partially embedded in the bottom of the cavity, thereby sealing the tube opening of the sample tube 6 (the air at the lower end of the test head 4 is blocked by the stretched second sealing unit 4-3, so it cannot enter the tube opening from the lower end of the test head 4; since the sliding column 4-5-2-1 has not yet been driven by the power device 1 The pressure applied to the connector 2 causes the air-permeable block 4-5-4 to contact the tube mouth of the sample tube 6 under the elastic force of the elastomer 4-5-3 itself, and the force ring 4-5-2-2 is subjected to the upward elastic force of the elastomer 4-5-3, thereby applying a pressure to the second sealing unit 4-3. The second sealing unit 4-3 is stretched under pressure to seal the gas channel of the fixed portion 4-4, thereby sealing the upper part of the tube mouth of the sample tube 6, thereby preventing the sample in the sample tube 6 from contacting the air, thereby ensuring the accuracy and stability of the test results.

[0090] After sealing the sample tube 6, when testing is required, the power device 1 applies a downward force to the connector 2, and the first sealing unit 3 located at the upper end of the fixed part 4-4 will be compressed and stretched, thereby sealing the connection between the connector 2 and the test head 4 to ensure air tightness. At the same time, the connector 2 presses down the force-bearing body 4-5-5 at the upper end of the sliding column 4-5-2-1, and the sliding column 4-5-2-1 is forced downward. The second sealing unit 4-3 is not subjected to force, and the tube mouth of the sample tube 6 loses its sealing. The gas of the test host passes through the gas channel of the connector 2, the channel on the end face of the force-bearing body 4-5-5 and the sliding area of ​​the gas channel at the upper end of the fixed part 4-4 in turn, bypasses the side of the second sealing unit 4-3 and the force-applying body 4-5-2-1, and passes through the breathable block 4-5-4 into the sample tube 6.

[0091] This example not only provides the possibility for automation, but also can effectively avoid the contact between air and samples, which is beneficial for the testing of air-sensitive samples.

[0092] Example 4

[0093] In a preferred embodiment 4, Figure 1 , Figure 2 , Figure 8 and Fig. 9 As shown, a sample tube sealing connection system includes a sample tube sealing connection device and an automatic grabbing device 5. The sample tube sealing connection device includes a power device 1, a connector 2, a first sealing unit 3 and a test head 4; the power device 1 is connected to the connector 2, the first sealing unit 3 is arranged between the connector 2 and the test head 4, the connector 2 and the test head 4 are sealed and connected, the connector 2 is provided with a connection port connected to a test host, and the test head 4 is provided with a gas through hole connected to the connection port.

[0094] The lower structure of the connector 2 and the upper structure of the fixing part 4-4 are in contact and sealed with each other through the first sealing unit 3. In this embodiment, the lower structure of the connector 2 is arranged in a convex shape, the upper structure of the fixing part 4-4 is provided with a corresponding groove, and the first sealing unit 3 is embedded in the lower end surface of the lower structure of the connector 2 (also in a convex shape).

[0095] In this embodiment, the test head 4 includes a nut 4-1, a sealing block 4-2, a second sealing unit 4-3 and a fixing portion 4-4;

[0096] The fixing portion 4-4 is provided with a cavity for inserting the sealing block 4-2;

[0097] The bottom of the cavity is provided with a sealing groove for the second sealing unit 4-3 to be embedded;

[0098] The sealing block 4-2 is connected to the nut 4-1, and the sealing block 4-2 is inserted into the cavity and contacts the second sealing unit 4-3.

[0099] The outer surface of the fixing portion 4 - 4 is provided with a fixing groove.

[0100] The automatic grasping device 5 is provided with a grasping portion 5-1. The automatic grasping device 5 is a robot arm.

[0101] The operation process of this embodiment is as follows:

[0102] The operator inserts the mouth of the sample tube 6 from the lower part of the test head 4 and fixes it with the sealing block 4-2. The mouth of the sample tube 6 contacts and finally passes through the second sealing unit 4-3. At the same time, the upper end of the sealing block 4-2 squeezes the second sealing unit 4-3, and the second sealing unit 4-3 is stretched under pressure and partially embedded in the bottom of the cavity, thereby sealing the mouth of the sample tube 6 (the air at the lower end of the test head 4 is blocked by the stretched second sealing unit 4-3 and cannot enter the mouth);

[0103] Compared with Example 1, this embodiment adds a fixed groove and an automatic gripping device 5. The purpose is to realize the automation of the test process. When no test is required, the installed sample tube sealing connection device is placed on the sample fixing rack beside the test host. When testing is required, the gripping part 5-1 of the automatic gripping device 5 grabs the sample tube 6 to realize automatic gripping. When placed, since the fixed groove is concave in the middle and protrudes at the upper and lower ends, it can be directly clamped on the fixed table of the test host, or the fixed table of the test host is set to a through hole similar to the shape of "8", and the part with a large radius is used for the upper part of the fixed groove to pass through, and then the automatic gripping device 5 moves horizontally with the sample tube sealing connection device to the part with a small radius, so that the sample tube sealing connection device can be clamped on the fixed table, which is convenient for subsequent operations.

[0104] After fixing the sample tube 6, the power device 1 applies a downward force to the connector 2, and the first sealing unit 3 located at the bottom of the connector 2 is compressed and stretched, sealing the connection between the connector 2 and the test head 4, thereby ensuring air tightness. Then, the connector 2 is connected to the test host through the connection port to start the test.

[0105] This configuration can meet the needs of large-scale testing. The sample tubes containing samples can be sealed and fixed on the test head, and then fixed on the sample fixing frame according to the number, so as to realize subsequent continuous and automatic large-scale fully automatic testing.

[0106] It should be pointed out that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sample tube sealing connection device, characterized in that: The device comprises at least one power device, at least one connection head, at least one first sealing unit and at least one test head; The power device is connected to the connecting head, the first sealing unit is arranged between the connecting head and the test head, the connecting head and the test head are sealed and connected, at least one connecting port connected to the test host is arranged on the connecting head, and the test head and the connecting head are provided with gas through holes connected to the connecting port.

2. The sample tube sealing connection device according to claim 1, characterized in that: The test head includes at least one nut, at least one sealing block, at least one second sealing unit and at least one fixing portion; The fixing portion is provided with a cavity for inserting the sealing block; The bottom of the cavity is provided with a sealing groove for the second sealing unit to be embedded; The sealing block is connected to the nut, and the sealing block is inserted into the cavity and contacts the second sealing unit.

3. The sample tube sealing connection device according to claim 2, characterized in that: The lower structure of the connector and the upper structure of the fixing part are in contact and sealed with each other through the first sealing unit; The first sealing unit is embedded in the lower structure of the connecting head or the upper structure of the fixing part.

4. The sample tube sealing connection device according to claim 2, characterized in that: The fixing part is provided with a fixing device for connecting with a test host.

5. The sample tube sealing connection device according to claim 2, characterized in that: The test head further comprises at least one self-sealing structure; The self-sealing structure is arranged in the gas through hole of the fixing part.

6. The sample tube sealing connection device according to claim 5, characterized in that: The self-sealing structure comprises a third sealing unit, a self-sealing block, an elastic body and a breathable block; The self-sealing block includes a sliding column and a force-applying ring; The force ring is arranged on the sliding column; The air permeable block is fixed in the gas through hole of the fixed part, one end of the elastomer is connected to the air permeable block, and the other end is against the lower end of the force ring, the third sealing unit is arranged on the upper end surface of the force ring, and the upper end of the gas through hole of the fixed part is provided with a sliding area that allows the sliding column to pass through but does not allow the third sealing unit and the force ring to pass through, and the outer diameter of the upper end of the sliding column is larger than the inner diameter of the gas through hole of the connector.

7. The sample tube sealing connection device according to claim 6, characterized in that: The self-sealing structure further comprises at least one force bearing block; The force-bearing block is arranged at the upper end of the sliding column, and the force-bearing block or the sliding column is provided with a channel communicating with the gas through hole of the connecting head.

8. The sample tube sealing connection device according to claim 1, characterized in that: The power device is selected from one of a cylinder, a motor and a hydraulic device.

9. A system of a sample tube sealing connection device as claimed in any one of claims 1 to 8, characterized in that: It comprises an automatic grabbing device; the automatic grabbing device is provided with a grabbing part.

10. The system of the sample tube sealing connection device according to claim 9, characterized in that: The automatic grasping device is a multi-axis robot or a mechanical arm.

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