Time-of-flight mass spectrometry flight tube

Abstract

The utility model discloses a time-of-flight mass spectrometry flight tube, which comprises a flight tube body, a flange and a hoop, second tightening parts are arranged at the positions, close to the edges, of the two ends of the circumferential face of the outer side wall of the flange, the flange coaxially abuts against the flight pipe body, the outer diameter of the flange is the same as that of the flight pipe body, and a main sealing groove corresponding to the sealing block is formed in the side, close to an opening of the flight pipe body, of the flange; when the flange abuts against the flight pipe body, the first tightening part and the second tightening part are folded, and after being folded, the first tightening part and the second tightening part are at least partially embedded into the tightening groove. A sealing block is arranged at each opening of the flight pipe and can be in matched abutting connection with a sealing groove, interference connection and gap connection can be selected for abutting connection, and the gap connection can reserve the position of a traditional sealing piece. The interference connection is one of airtight connection, the sealing effect can be achieved by replacing an original sealing piece with a soft metal pad, and vacuum qualitative change and air oxidation can be resisted.

Description

Technical Field

[0001] The utility model relates to the technical field of mass spectrometers, and more specifically, to a time-of-flight mass spectrometer flight tube. Background Art

[0002] Time-of-flight mass spectrometry technology is a method of dropping samples directly onto a specially modified surface chip after simple pretreatment. It can not only compare the differential proteins between two samples, but also obtain an overview of the proteins in the samples. Therefore, it has significant advantages in application. Samples analyzed by SELDI technology do not need to be pre-purified by liquid chromatography or gas chromatography, so it can be used to analyze complex biological samples.

[0003] Time of Flight Mass Spectrometer (TOF) is a very commonly used mass spectrometer. The mass analyzer of this mass spectrometer is an ion drift tube. The ions generated by the ion source are accelerated into the field-free drift tube and fly to the ion receiver at a constant speed. The larger the ion mass, the longer it takes to reach the receiver, and the smaller the ion mass, the shorter the time it takes to reach the receiver. Based on this principle, ions of different masses can be separated according to the size of the m / z value.

[0004] The mass spectrometer must work properly under good vacuum conditions. Generally, the vacuum degree of the ion source should reach 10-3~10-4Pa, and the vacuum degree of the mass analyzer and detector should reach 10-4~10-5Pa.

[0005] At present, the seals on the flight tube in the mass spectrometer are all rubber seals directly exposed to the air, and the seals are easily damaged in a vacuum; the seals are also prone to aging in the air, and insufficient vacuum in the flight tube will greatly affect the measurement effect. Utility Model Content

[0006] The utility model aims to provide a time-of-flight mass spectrometer flight tube, which can ensure the sealing effect.

[0007] The above technical purpose of the utility model is achieved through the following technical scheme: a time-of-flight mass spectrometer flight tube, including a flight tube body, a flange and a clamp.

[0008] The flight tube body has a tubular structure with a plurality of openings, each opening is provided with a first tightening portion, and a sealing block is provided on the end surface of the opening of the flight tube body;

[0009] A second tightening portion is provided near the edge at both ends of the circumferential surface of the outer wall of the flange, the flange is coaxially abutted with the flight tube body, the outer diameter of the flange is the same as the outer diameter of the flight tube body, and a main sealing groove corresponding to the sealing block is provided on one side of the flange close to the opening of the flight tube body;

[0010] The hoop is a semicircular hoop strip structure, and a tightening groove is provided on the inner side wall of the hoop;

[0011] When the flange is in contact with the flight tube body, the first tightening portion and the second tightening portion are closed, and the first tightening portion and the second tightening portion are at least partially embedded in the tightening groove after being closed.

[0012] A sealing block is arranged at each opening of the flight tube to cooperate with the sealing groove, and the abutment can be selected as interference connection and gap connection. The gap connection can reserve the position of the traditional seal. The interference connection itself is one of the airtight connections. The original seal can also be replaced with a soft metal pad to achieve the sealing effect, and it can resist vacuum quality change and air oxidation.

[0013] The coordinated arrangement of the tightening portion and the clamp can ensure that the clamp always presses the tightening portion, and the clamp is forcibly tightened to form an interference tightening effect.

[0014] The utility model is further configured as follows: a side of the first tightening portion close to the flange is a plane, and a side of the first tightening portion away from the flange is an inclined surface.

[0015] The plane setting enables better approach to the flange, while the inclined surface setting enables more convenient installation of the clamp and can achieve the effect of pressure tightening, and the pressure tightening can reversely achieve the effect of bolt fixing.

[0016] The utility model is further configured such that: a side of the second tightening portion close to the flight tube body is a plane, a side of the second tightening portion away from the flight tube body is an inclined surface, and the inclined surfaces of the first tightening portion and the second tightening portion are both inclined surfaces with the same angle.

[0017] The plane setting enables better approach to the flight tube body, while the inclined surface setting enables more convenient installation of the clamp and can achieve the effect of pressure tightening, and the pressure tightening can reversely achieve the effect of bolt fixing.

[0018] The utility model is further configured as follows: the cross section of the tightening groove is an isosceles trapezoidal groove and the opening of the tightening groove gradually narrows toward the inner wall.

[0019] The isosceles trapezoid can ensure that the pressure applied on both sides is equal when tightening, preventing uneven pressure from causing pressure metal fatigue on one side.

[0020] The utility model is further configured such that: after the first tightening part and the second tightening part are closed, at least 2 / 3 of the tightening groove is embedded therein.

[0021] The fixing effect is achieved by embedding most of the tightening part into the tightening groove, and then a certain degree of over-pressurization is performed through the reserved margin, thereby achieving the effects of pressurization and anti-loosening.

[0022] The utility model is further configured as follows: the cross section of the sealing block is a trapezoidal convex block structure, the cross section of the main sealing groove is an inwardly concave trapezoidal groove and gradually shrinks from the main sealing groove into the groove.

[0023] By reminding the structure of the protrusion and the corresponding setting of the concave trapezoid, multiple matching effects can be formed, such as: interference, gap, transition, etc., and each matching method has its own advantages and disadvantages.

[0024] The utility model is further configured as follows: a sealing layer is coated between the sealing block and the main sealing groove.

[0025] The original seal can be replaced by coating the sealing layer, and because the sealing layer is liquid, it can be various glues or other adherent antioxidant sealants.

[0026] The utility model is further configured as follows: a first secondary sealing groove is also arranged on the end surface of the flight tube body opening, and the first secondary sealing groove is located on a side of the sealing block close to the outer wall.

[0027] The setting of the first secondary sealing groove can achieve secondary isolation, and the rubber sealing strip can be filled in the second secondary sealing groove. The original clamp can isolate the sealing strip from the air to a certain extent to reduce its aging. After adding the sealing strip, the coated sealing layer can be protected from being oxidized by the air, so long-term use effect can be achieved.

[0028] The utility model is further configured as follows: second secondary sealing grooves are arranged on the end surfaces on both sides of the flange, and the second secondary sealing grooves are located on the side of the sealing block close to the outer wall, and the second secondary sealing grooves are aligned with the first secondary sealing grooves.

[0029] The effect of adding a sealing strip can be better achieved through the cooperation of the first secondary sealing groove and the second secondary sealing groove, and a sealing strip with a square interface can be added thereto.

[0030] Corresponding to the above, the utility model has the following beneficial effects:

[0031] 1. A sealing block is arranged at each opening of the flight tube to cooperate with the sealing groove, and the abutment can be selected as interference connection and gap connection. The gap connection can reserve the position of the traditional seal. The interference connection itself is one of the airtight connections. The original seal can also be replaced with a soft metal pad to achieve the sealing effect, and it can resist vacuum quality change and air oxidation;

[0032] 2. The coordinated arrangement of the tightening part and the clamp can ensure that the clamp always presses the tightening part, and the clamp is forcibly tightened to form an interference tightening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a three-dimensional diagram of the flight tube in the embodiment of the utility model;

[0034] Figure 2 In the present utility model embodiment Figure 1 A cross-sectional view of

[0035] Figure 3 In the present utility model embodiment Figure 1 Exploded diagram of

[0036] Figure 4 In the present utility model embodiment Figure 1 A partial exploded cross-sectional view;

[0037] Figure 5 It is a three-dimensional diagram of a clamp in an embodiment of the utility model;

[0038] Figure 6 It is a three-dimensional diagram of the flange in the embodiment of the utility model;

[0039] Figure 7 In the present utility model embodiment Figure 2 The enlarged view of point A in the middle;

[0040] Figure 8 In the present utility model embodiment Figure 6 sectional view of .

[0041] In the figure:

[0042] 1. Flight tube body; 11. First tightening part; 12. Sealing block; 13. First secondary sealing groove;

[0043] 2. Clamp; 21. Tightening groove; 22. Fixing hole; 23. Ear plate;

[0044] 3. Flange; 31. Main sealing groove; 32. Second secondary sealing groove; 33. Second tightening part. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0046] It should be noted that if the terms "first", "second", etc. are involved in the specification and claims of the utility model and the above-mentioned drawings, they are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described here. In addition, if the terms "including" and "having" and any of their variations are involved, it is intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] In addition, in the present invention, the terms "installation", "setting", "provided with", "connection", "connected", "socketing" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0048] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] The following is combined with Figure 1-8 The utility model is described in further detail.

[0050] Example

[0051] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a time-of-flight mass spectrometer flight tube includes a flight tube body 1, a flange 3 and a clamp 2.

[0052] The flight tube body 1 is a tubular structure with a plurality of openings, each of which is provided with a first tightening portion 11 , and a sealing block 12 is provided on the end surface of the opening of the flight tube body 1 .

[0053] Second tightening parts 33 are arranged near the edges of both ends of the circumferential surface of the outer wall of the flange 3. The flange 3 is coaxially abutted with the flight tube body 1. The outer diameter of the flange 3 is the same as the outer diameter of the flight tube body 1. A main sealing groove 31 corresponding to the sealing block 12 is arranged on one side of the flange 3 close to the opening of the flight tube body 1. The sealing block 12 is arranged at each opening of the flight tube so that it can be matched with the sealing groove for abutment. The abutment can be selected as an interference connection and a gap connection. The gap connection can leave the position of the traditional sealing part. The interference connection itself is one of the airtight connections. The original sealing part can also be replaced with a soft metal pad to achieve the sealing effect, and it can resist vacuum quality change and air oxidation.

[0054] The hoop 2 is a semicircular hoop strip structure, and a tightening groove 21 is provided on the inner side wall of the hoop 2; when the flange 3 is in contact with the flight tube body 1, the first tightening portion 11 and the second tightening portion 33 are closed, and the first tightening portion 11 and the second tightening portion 33 are at least partially embedded in the tightening groove 21 after closing. The coordination of the tightening portion and the hoop 2 can ensure that the hoop 2 always presses the tightening portion, and the hoop 2 is forcibly tightened to form an interference tightening effect.

[0055] The side of the first tightening part 11 close to the flange 3 is a plane, and the side of the first tightening part 11 away from the flange 3 is an inclined surface. The plane can be better close to the flange 3, and the inclined surface can be more convenient to install the clamp 2 and achieve the effect of pressure tightening, and the pressure tightening can reversely achieve the effect of bolt fixing.

[0056] The side of the second tightening part 33 close to the flight tube body 1 is a plane, and the side of the second tightening part 33 away from the flight tube body 1 is an inclined surface. The inclined surfaces of the first tightening part 11 and the second tightening part 33 are inclined surfaces with the same angle. The plane can be set to get closer to the flight tube body 1, and the inclined surface can be set to install the clamp 2 more conveniently and achieve the effect of pressure tightening, and the pressure tightening can reversely achieve the effect of bolt fixing.

[0057] The cross section of the tightening groove 21 is an isosceles trapezoidal slot and the opening of the tightening groove 21 gradually narrows toward the inner wall. The isosceles trapezoidal shape can ensure that the pressure applied on both sides is equal during tightening to prevent uneven pressure from causing pressure metal fatigue on one side.

[0058] After the first tightening part 11 and the second tightening part 33 are closed, they are at least embedded in the tightening groove 21. The fixing effect is achieved by embedding most of the tightening parts in the tightening groove 21, and then a certain degree of over-pressurization is performed through the reserved margin, thereby achieving the effect of pressurization and anti-loosening.

[0059] The cross section of the sealing block 12 is a trapezoidal convex block structure, and the cross section of the main sealing groove 31 is an inwardly concave trapezoidal groove that gradually shrinks from the main sealing groove 31 to the groove. Through the structure of the reminder convex block and the corresponding inwardly concave trapezoidal setting, multiple matching effects can be formed, such as: interference, clearance, transition, etc., and each matching method has its own advantages and disadvantages.

[0060] A sealing layer is coated between the sealing block 12 and the main sealing groove 31. The coating of the sealing layer can replace the original sealing member, and the sealing layer can be various glues or other anti-oxidation sealants because the sealing layer is liquid.

[0061] A first secondary sealing groove 13 is also provided on the end surface of the opening of the flight tube body 1, and the first secondary sealing groove 13 is located on the side of the sealing block 12 close to the outer wall. The first secondary sealing groove 13 can be provided for secondary isolation, and a rubber sealing strip can be filled in the second secondary sealing groove 32, because the original clamp 2 can isolate the sealing strip from the air to a certain extent to reduce its aging, and after adding the sealing strip, the applied sealing layer can be protected from being oxidized by the air, so that a long-term use effect can be achieved.

[0062] The end surfaces on both sides of the flange 3 are provided with a second secondary sealing groove 32, and the second secondary sealing groove 32 is located on the side of the sealing block 12 close to the outer wall, and the second secondary sealing groove 32 and the first secondary sealing groove 13. The first secondary sealing groove 13 and the second secondary sealing groove 32 can better achieve the effect of adding a sealing strip, and a sealing strip with a square interface can be added thereto.

[0063] As a preferred embodiment: the clamp 2 is divided into many forms. In the present embodiment, the clamp 2 is protected by ear plates 23 at both ends and fixing holes 22 are provided on the ear plates 23. The fixing effect is achieved by passing the screw nut through the corresponding fixing holes 22 on the two ear plates 23. The friction between the nut and the screw head and the ear plate 23 will increase due to excessive tightening, resulting in an anti-slip effect.

[0064] Preferably, in order to better align the flight tube body 1 and the flange 3, at least two positioning holes arranged in an array equidistant along the circumferential direction are provided on the contact surface between the flange 3 and the flight tube body 1, and the positioning holes are blind holes. The flight tube body 1 is provided with positioning columns corresponding to the number and positions of the positioning holes.

[0065] Working principle: A sealing block 12 is arranged at each opening of the flight tube to cooperate with the sealing groove, and the abutment can be selected from interference connection and gap connection. The gap connection can reserve the position of the traditional seal. The interference connection itself is one of the airtight connections. The original seal can also be replaced with a soft metal pad to achieve the sealing effect, and it can resist vacuum quality change and air oxidation; through the coordinated setting of the tightening part and the clamp 2, it can be ensured that the clamp 2 always presses the tightening part, and the clamp 2 is forcibly tightened to form an interference tightening effect.

[0066] It should be noted that all features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.

[0067] In addition, the above specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the utility model, and these solutions also belong to the disclosure scope of the utility model and fall within the protection scope of the utility model. Those skilled in the art should understand that the utility model specification and its drawings are illustrative and do not constitute a limitation of the claims. The protection scope of the utility model is defined by the claims and their equivalents.

Claims

1. A time-of-flight mass spectrometer flight tube, characterized in that: include: The flight tube body (1) is a tubular structure with a plurality of openings, each opening being provided with a first tightening portion (11), and a sealing block (12) being provided on the end surface of the opening of the flight tube body (1); A flange (3), wherein both ends of the outer wall circumferential surface of the flange (3) are provided with second tightening parts (33) near the edge, the flange (3) is coaxially abutted with the flight tube body (1), the outer diameter of the flange (3) is the same as the outer diameter of the flight tube body (1), and a main sealing groove (31) corresponding to the sealing block (12) is provided on one side of the flange (3) close to the opening of the flight tube body (1); A hoop (2) having a semicircular hoop strip structure, wherein a tightening groove (21) is provided on the inner side wall of the hoop (2); When the flange (3) and the flight tube body (1) are in contact, the first tightening portion (11) and the second tightening portion (33) are closed, and after the first tightening portion (11) and the second tightening portion (33) are closed, they are at least partially embedded in the tightening groove (21).

2. A time-of-flight mass spectrometer flight tube according to claim 1, characterized in that: The side of the first tightening portion (11) close to the flange (3) is a plane, and the side of the first tightening portion (11) away from the flange (3) is an inclined surface.

3. A time-of-flight mass spectrometer flight tube according to claim 2, characterized in that: The side of the second tightening portion (33) close to the flight tube body (1) is a plane, and the side of the second tightening portion (33) away from the flight tube body (1) is an inclined surface, and the inclined surfaces of the first tightening portion (11) and the second tightening portion (33) are both inclined surfaces with the same angle.

4. A time-of-flight mass spectrometer flight tube according to claim 3, characterized in that: The cross section of the tightening groove (21) is an isosceles trapezoidal groove, and the opening of the tightening groove (21) gradually narrows toward the inner wall.

5. A time-of-flight mass spectrometer flight tube according to claim 4, characterized in that: When the first tightening portion (11) and the second tightening portion (33) are closed, they are embedded at least 2 / 3 of the way into the tightening groove (21).

6. A time-of-flight mass spectrometer flight tube according to claim 1, characterized in that: The cross section of the sealing block (12) is a trapezoidal convex block structure, and the cross section of the main sealing groove (31) is an inwardly concave trapezoidal groove and gradually shrinks from the main sealing groove (31) into the groove.

7. A time-of-flight mass spectrometer flight tube according to claim 1, characterized in that: A sealing layer is coated between the sealing block (12) and the main sealing groove (31).

8. A time-of-flight mass spectrometer flight tube according to claim 1, characterized in that: A first secondary sealing groove (13) is also provided on the end surface at the opening of the flight tube body (1), and the first secondary sealing groove (13) is located on a side of the sealing block (12) close to the outer wall.

9. A time-of-flight mass spectrometer flight tube according to claim 8, characterized in that: Second secondary sealing grooves (32) are provided on the end surfaces on both sides of the flange (3), and the second secondary sealing grooves (32) are located on a side of the sealing block (12) close to the outer wall, and the second secondary sealing grooves (32) correspond to the first secondary sealing grooves (13).

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