Capillary connection device and mass spectrometer

Abstract

The utility model embodiment provides a kind of capillary connecting device and mass spectrometer, including first connecting piece, second connecting piece and limit piece, first connecting piece is formed with first through hole, and first through hole is used for the capillary to be set;Second connecting piece is formed with mounting hole and the communication hole being communicated with mounting hole, and first step surface is formed between mounting hole and communication hole;First connecting piece, second connecting piece and limit piece are separately set;First connecting piece and capillary part are inserted into mounting hole, and capillary at least part is protruding first through hole and abuts to first step surface, first connecting piece can be moved along mounting hole to communication hole, until limit piece is respectively connected with first connecting piece and second connecting piece, to limit the position of first connecting piece relative to second connecting piece.The technical scheme of the utility model embodiment aims to control the length of capillary protruding first connecting piece, improve the stability and reliability of mass spectrometer analysis result.

Description

Technical Field

[0001] This utility model relates to the field of mass spectrometry equipment technology, and in particular to a capillary connection device and a mass spectrometer. Background Technology

[0002] Currently, the capillary device in a mass spectrometer typically involves passing the capillary through a connector, and then extending the connector and capillary into the base. The connector and base work together to fix the capillary. However, the connector can easily extend too far into the base, resulting in the capillary extending too short of the connector, which can easily affect the analytical results of the mass spectrometer. Utility Model Content

[0003] This utility model provides a capillary connection device and a mass spectrometer, which aims to control the length of the capillary extending out of the first connector and improve the stability and reliability of the mass spectrometer analysis results.

[0004] In a first aspect, embodiments of the present invention provide a capillary connection device for a mass spectrometer, comprising:

[0005] The first connector has a first through hole for the capillary tube to pass through.

[0006] The second connector has a mounting hole and a communicating hole communicating with the mounting hole, and a first stepped surface is formed between the mounting hole and the communicating hole; and,

[0007] The limiting component is provided separately as follows: the first connecting component, the second connecting component, and the limiting component are separately configured.

[0008] The first connector and the capillary portion extend into the mounting hole. The capillary at least partially extends out of the first through hole and abuts against the first stepped surface. The first connector is movable along the mounting hole toward the through hole until the limiting member is connected to the first connector and the second connector respectively, so as to limit the position of the first connector relative to the second connector.

[0009] Optionally, the first connector includes a first part and a second part arranged sequentially along the axial direction of the first through hole, with a second stepped surface formed between the first part and the second part, and the limiting member located between the second part and the second connector; the first part extends at least partially into the mounting hole and moves along the mounting hole toward the connecting hole until the opposite sides of the limiting member are respectively connected to the second stepped surface and the second connector.

[0010] Optionally, the first portion is threaded into the mounting hole.

[0011] Optionally, the limiting member is fitted onto the outer periphery of the first part.

[0012] Optionally, the limiting member is a closed-loop structure.

[0013] Optionally, the outer diameter of the limiting member is less than or equal to the outer diameter of the second portion; and / or

[0014] The outer diameter of the limiting member is less than or equal to the outer diameter of the second connecting member.

[0015] Optionally, the limiting member is made of plastic.

[0016] Optionally, the outer periphery of the second connector is provided with a receiving groove for accommodating the seal.

[0017] Optionally, the outer periphery of the first connector has a first clamping plane and a second clamping plane disposed opposite to each other; and / or,

[0018] The outer periphery of the second connector has a third clamping plane and a fourth clamping plane arranged opposite to each other.

[0019] Secondly, embodiments of the present invention provide a mass spectrometer, including the capillary connection device as described in the first aspect.

[0020] The capillary connecting device and mass spectrometer provided in this embodiment of the invention limit the position of the first connecting member relative to the second connecting member by setting a limiting member, that is, limit the length of the first connecting member extending into the second connecting member. This allows the capillary to be in contact with the first step surface to achieve a volumeless state while controlling the length of the capillary extending out of the first connecting member, thereby achieving precise positioning of the capillary. This is beneficial to improving the stability and reliability of the mass spectrometer analysis results when the capillary connecting device is applied to the mass spectrometer. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of a capillary connection device provided in an embodiment of this utility model;

[0023] Figure 2 This is a half-sectional schematic diagram of a capillary connection device provided in an embodiment of the present utility model.

[0024] Explanation of key figure labels:

[0025] 1. First connector; 1a. First end; 1b. Second end; 11. First through hole; 12. First part; 13. Second part; 14. Second stepped surface; 2. Second connector; 21. Mounting hole; 22. Connecting hole; 23. First stepped surface; 24. Receiving groove; 3. Limiting element; 4. Capillary tube; 5. Sealing element. Detailed Implementation

[0026] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 and Figure 2 This utility model provides a capillary connection device for use in a mass spectrometer. The capillary connection device includes a first connector 1, a second connector 2, and a limiting member 3. The first connector 1 has a first through hole 11 for a capillary tube 4 to pass through. The second connector 2 has a mounting hole 21 and a connecting hole 22 communicating with the mounting hole 21. A first stepped surface 23 is formed between the mounting hole 21 and the connecting hole 22. The first connector 1, the second connector 2, and the limiting member 3 are separately disposed. The first connector 1 and the capillary tube 4 partially extend into the mounting hole 21, and the capillary tube 4 at least partially extends out of the first through hole 11 and abuts against the first stepped surface 23. The first connector 1 can move along the mounting hole 21 towards the connecting hole 22 until the limiting member 3 is respectively connected to the first connector 1 and the second connector 2 to limit the position of the first connector 1 relative to the second connector 2.

[0028] By setting a limiting member 3 to limit the position of the first connector 1 relative to the second connector 2 when the first connector 1 is connected to the second connector 2, the length of the first connector 1 extending into the second connector 2 is limited. This allows for the control of the length of the capillary 4 extending out of the first connector 1 while ensuring that there is no dead volume at the connection between the capillary 4 and the second connector 2 when the capillary 4 abuts against the first step surface 23. This enables precise positioning of the capillary 4 and improves the stability and reliability of the mass spectrometer analysis results when the capillary 4 connector device is applied to the mass spectrometer.

[0029] For example, the first connector 1 has a first end 1a and a second end 1b disposed opposite to each other. The first through hole 11 can pass through the first end 1a and the second end 1b of the first connector 1. The capillary 4 can extend into the first through hole 11 from the opening of the first through hole 11 located at the second end 1b. The capillary 4 extends at least partially from the first end 1a out of the first through hole 11. The first end 1a of the first connector 1 and the capillary 4 are together disposed in the mounting hole 21 of the second connector 2.

[0030] Specifically, the first end 1a of the first connector 1 has a tapered structure. The first connector 1 and the second connector 2 are connected. The tapered surface of the tapered structure contacts the wall of the mounting hole 21, so that the wall of the mounting hole 21 can apply radial pressure to the tapered surface, causing the tapered structure to contract towards the inside of the capillary 4. The wall of the first through hole 11 is connected to the capillary 4, fixing the capillary 4 to the first connector 1.

[0031] Understandably, by replacing the limiting parts 3 of different sizes, the relative positions of the first connecting part 1 and the second connecting part 2 can be adjusted, so that the length of the first connecting part 1 extending into the mounting hole 21 is different, in order to adapt to different usage requirements.

[0032] like Figure 2 As shown, in some embodiments, the first connector 1 includes a first portion 12 and a second portion 13 arranged sequentially along the axial direction of the first through hole 11. A second stepped surface 14 is formed between the first portion 12 and the second portion 13. A limiting member 3 is located between the second portion 13 and the second connector 2. The first portion 12 extends at least partially into the mounting hole 21 and moves along the mounting hole 21 toward the connecting hole 22 until the opposite sides of the limiting member 3 are respectively connected to the second stepped surface 14 and the second connector 2. It can be understood that after the first portion 12 extends into the mounting hole 21 and is located at a preset position in the mounting hole 21, the limiting member 3 is clamped in the middle by the second portion 13 and the second connector 2, restricting the first portion 12 from further extending into the mounting hole 21, controlling the position of the first connector 1 relative to the second connector 2, thereby controlling the length of the capillary 4 extending out of the first connector 1.

[0033] Optionally, the second step surface 14 can be a plane, an arc surface, or a conical surface.

[0034] For example, such as Figure 2As shown, the second stepped surface 14 formed between the first part 12 and the second part 13 is a plane, and the second connector 2 has a first plane located on the outer periphery of the opening of the mounting hole 21. The limiting member 3 is located between the second part 13 and the second connector 2. The limiting member 3 has a first abutting plane on one side facing the second connector 2 along the axial direction of the mounting hole 21. The first abutting plane can abut against the first plane. The limiting member 3 has a second abutting plane on the other side facing the second part 13 along the axial direction of the mounting hole 21. The first part 12 can extend into the mounting hole 21 and move along the mounting hole 21 towards the connecting hole 22 until the second stepped surface 14 between the second part 13 and the first part 12 abuts against the second abutting plane. The second part 13 and the second connector 2 clamp the limiting member 3.

[0035] Specifically, by selecting limiting members 3 of different sizes along the axial direction of the mounting hole 21, the relative positions of the first connecting member 1 and the second connecting member 2 under the limiting action of the limiting member 2 when clamping the limiting member 3 can be adjusted, so that the length of the first connecting member 1 extending into the mounting hole 21 is different, thus adapting to different usage requirements.

[0036] In some embodiments, the second connector 2 is provided with a slot, which is arranged around the outer periphery of the mounting hole 21. One side of the limiting member 3 can be engaged in the slot, so that the limiting member 3 and the second connector 2 are connected. The second connector 2 is used to restrict the movement of the limiting member 3, so that the limiting member 3 is stably set between the second part 13 and the second connector 2.

[0037] In some embodiments, the first portion 12 is threaded to the mounting hole 21. It is understood that the first portion 12 threaded to the mounting hole 21 simplifies the connection structure of the first connector 1 and the second connector 2, and reduces the volume of the capillary connection device.

[0038] Specifically, the first part 12 has a threaded portion on its outer periphery, and the mounting hole 21 is a threaded hole. The first part 12 is threadedly connected to the mounting hole 21 through the threaded portion.

[0039] Specifically, the first connector 1 can move relative to the second connector 2 in a spiral direction toward the connecting hole 22, so that the first connector 1 goes deeper into the mounting hole 21 until the first connector 1 is connected to the limiting member 3.

[0040] In other embodiments, the first connector 1 can be connected to the second connector 2 by a snap-fit, or the first connector 1 may also have a third part located on the outer periphery of the first part 12, the third part and the first part 12 being spaced apart, and one end of the third part being connected to the second part 13. As the first part 12 gradually extends into the mounting hole 21, the second connector 2 may partially extend between the first part 12 and the third part, and the second connector 2 is threadedly connected to the third part.

[0041] For example, the first connector 1 has a second portion 13 and a first portion 12 arranged sequentially from the second end 1b to the first end 1a. The first through hole 11 passes through the first end 1a and the second end 1b, that is, the first through hole 11 passes through the second portion 13 and the first portion 12. When assembling the capillary connecting device, the capillary 4 can be inserted from the second end 1b of the first connector 1 into the first through hole 11, and part of the capillary 4 can extend out of the first through hole 11 from the first end 1a. Then, the second connector 2 and the first connector 1 can be held together. The second part 13 is inserted into the mounting hole 21 of the second connector 2 by inserting the first part 12 of the first connector 1 and the capillary tube 4. The capillary tube 4 abuts against the first stepped surface 23 formed between the mounting hole 21 and the connecting hole 22. The first part 12 of the first connector 1 is pre-tightened in the mounting hole 21. Then, the second part 13 is clamped by a clamping member such as a wrench, so that the first part 12 of the first connector 1 is further inserted into the mounting hole 21 until the second part 13 is connected to the limiting member 3. The second part 13 and the second connector 2 clamp the limiting member 3.

[0042] In some embodiments, the limiting member 3 is sleeved on the outer periphery of the first part 12. It can be understood that the limiting member 3 being sleeved on the outer periphery of the first part 12 increases the contact area between the limiting member 3 and the second step surface 14, making the limiting member 3 more stably connected to the second part 13. Moreover, the limiting member 3 can connect with the second part 13 at multiple points around the periphery, limiting the position of the first connecting member 1 relative to the second connecting member 2 at various points around the periphery, and preventing the first connecting member 1 from tilting relative to the second connecting member 2.

[0043] For example, the second step surface 14 extends circumferentially along the first portion 12, so that the limiting member 3 can engage with the second step surface 14 at multiple points circumferentially.

[0044] Optionally, the limiting element 3 can be an open-loop structure or a closed-loop structure.

[0045] In some embodiments, the limiting member 3 is a closed-loop structure. This prevents the limiting member 3 from dislodging from the first part 12.

[0046] Specifically, the size and shape of the inner ring of the limiting member 3 are adapted to the size and shape of the first part 12, for example... Figure 1 and Figure 2 As shown, the cross-section of the first part 12 is annular, and the inner ring wall of the limiting member 3 can be annular, and the radius of the inner ring wall is slightly larger than the radius of the first part 12, so that the limiting member 3 can be fitted onto the outer periphery of the first part 12.

[0047] In some embodiments, the limiting member 3 is an open-loop structure. For example, the limiting member 3 is a U-shaped open-loop structure.

[0048] In some embodiments, the outer diameter of the limiting member 3 is less than or equal to the outer diameter of the second part 13; and / or, the outer diameter of the limiting member 3 is less than or equal to the outer diameter of the second connector 2. When the above conditions are met, the size of the limiting member 3 can be limited to prevent the limiting member 3 from protruding excessively from the second part 13 or the second connector 2, so as to facilitate the subsequent installation of the capillary connection device.

[0049] In some embodiments, the limiting member 3 is made of plastic to reduce the weight of the capillary connection device and facilitate manual operation.

[0050] In other embodiments, the limiting member 3 may also be made of metal.

[0051] In some embodiments, the outer periphery of the second connector 2 is provided with a receiving groove 24 for accommodating the seal 5, so as to achieve a sealed connection of the capillary connector when the capillary connector is installed on other components of the mass spectrometer.

[0052] For example, the seal 5 includes, but is not limited to, rubber rings, adhesives, etc.

[0053] In some embodiments, the outer periphery of the first connector 1 has a first clamping plane and a second clamping plane arranged opposite to each other; and / or, the outer periphery of the second connector 2 has a third clamping plane and a fourth clamping plane arranged opposite to each other, so as to facilitate the user to manually clamp the first connector 1 or the second connector 2, or to facilitate the clamping member to stably clamp the first connector 1 or the second connector 2, thereby connecting the first connector 1 to the second connector 2.

[0054] This utility model embodiment also provides a mass spectrometer, which includes the capillary connection device as described in any of the preceding embodiments. It is understood that the mass spectrometer with the capillary connection device described above also possesses all of its technical effects, namely, it can control the length of the capillary 4 extending beyond the first connector 1 while achieving volumeless contact between the capillary 4 and the first step surface 23, thereby achieving precise positioning of the capillary 4 and improving the stability and reliability of the mass spectrometer's analytical results.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A capillary connection device, characterized in that, For use in mass spectrometers, including: The first connector has a first through hole for the capillary tube to pass through. The second connector has a mounting hole and a communicating hole communicating with the mounting hole, and a first stepped surface is formed between the mounting hole and the communicating hole; and, The limiting component is provided separately as follows: the first connecting component, the second connecting component, and the limiting component are separately configured. The first connector and the capillary portion extend into the mounting hole. The capillary at least partially extends out of the first through hole and abuts against the first stepped surface. The first connector is movable along the mounting hole toward the through hole until the limiting member is connected to the first connector and the second connector respectively, so as to limit the position of the first connector relative to the second connector.

2. The capillary connecting device according to claim 1, characterized in that, The first connector includes a first part and a second part arranged sequentially along the axial direction of the first through hole, with a second stepped surface formed between the first part and the second part, and the limiting member located between the second part and the second connector; the first part extends at least partially into the mounting hole and moves along the mounting hole toward the connecting hole until the opposite sides of the limiting member are respectively connected to the second stepped surface and the second connector.

3. The capillary connecting device according to claim 2, characterized in that, The first part is threaded into the mounting hole.

4. The capillary connection device according to claim 2, characterized in that, The limiting component is fitted onto the outer periphery of the first part.

5. The capillary connecting device according to claim 4, characterized in that, The limiting component has a closed-loop structure.

6. The capillary connecting device according to claim 2, characterized in that, The outer diameter of the limiting member is less than or equal to the outer diameter of the second part; and / or The outer diameter of the limiting member is less than or equal to the outer diameter of the second connecting member.

7. The capillary connecting device according to any one of claims 1-6, characterized in that, The limiting component is made of plastic.

8. The capillary connecting device according to any one of claims 1-6, characterized in that, The outer periphery of the second connector is provided with a receiving groove for accommodating the seal.

9. The capillary connecting device according to any one of claims 1-6, characterized in that, The outer periphery of the first connector has a first clamping plane and a second clamping plane disposed opposite to each other; and / or, The outer periphery of the second connector has a third clamping plane and a fourth clamping plane arranged opposite to each other.

10. A mass spectrometer, characterized in that, Includes the capillary connection device as described in any one of claims 1-9.

Images