Ion optical guide rail adjustment device

Abstract

The present invention discloses an ion optical guide adjustment device, comprising: a vacuum part, the interior of which is hollow to form a receiving cavity; an ion optical guide, which is arranged in the receiving cavity, a pole unit, at least part of which is arranged in the receiving cavity, and the pole unit is connected to the ion optical guide; a stepped shaft, which is connected to the pole unit; and a position detection part, which is installed on the vacuum part. According to the present invention, it is convenient to adjust the position of the ion optical guide, and the operation is very simple. Finally, the alignment of the ion optical guide and the interface is achieved, so that more ions are introduced into the ion guide rod, which effectively improves the detection strength and analysis accuracy of the mass spectrometer, and reduces the difference between units in the production and assembly process of the mass spectrometer.

Description

Technical Field

[0001] The present invention relates to the technical field of mass analysis instruments, and more specifically, to an ion optical guide rail adjustment device. Background Art

[0002] A mass spectrometer is an analytical instrument that ionizes material particles, separates the ions by mass-to-charge ratio through an appropriate electromagnetic field, and detects their intensity for qualitative and quantitative analysis. The triple quadrupole mass spectrometer is the most typical tandem mass spectrometer. The basic principle is that the sample is ionized by the ion source to form an ion flow that passes through the three-cone interface of the air curtain cone, the small hole cone, and the interceptor cone into the ion optical guide. The ion optical guide is set inside the vacuum chamber and uses a three-section quadrupole structure for mass analysis. There is also an ion guide rod before the first section of the quadrupole. The ion optical path of the quadrupole on this ion optical guide can be calibrated for coaxiality with each other through three coordinates or a height ruler. The three interface cones are in a matching relationship with each other, and the center of the opening in the middle is coaxial. The interface cone is coaxially assembled with the vacuum chamber.

[0003] At present, the ion optical guides are all pushed into the vacuum chamber after being assembled externally. The guides are long and there is a gap between the inner diameter of the vacuum chamber and the guides, which causes the focusing axis of the ion optical guides to easily deviate from the interface cone axis of the mass spectrometer, resulting in the loss of some ions, greatly affecting the detection capability of the mass spectrometer, and the different coaxiality of each mass spectrometer causes differences between them.

[0004] In view of this, it is necessary to develop an ion optical guide rail adjustment device to solve the above problems. Summary of the invention

[0005] In view of the shortcomings of the prior art, the main purpose of the present invention is to provide an ion optical rail adjustment device, which is convenient for adjusting the position of the ion optical rail and is very simple to operate. Finally, the ion optical rail is aligned with the interface, so that more ions are guided into the ion guide rod, which effectively improves the detection intensity and analysis accuracy of the mass spectrometer and reduces the difference between the mass spectrometers during the production and assembly process.

[0006] In order to achieve these objects and other advantages according to the present invention, an ion optical guide rail adjustment device is provided, comprising: a vacuum member, the interior of which is hollow to form a receiving chamber;

[0007] an ion optical guide rail, which is arranged in the accommodating chamber,

[0008] A rod unit, at least part of which is disposed in the accommodating cavity, and the rod unit is connected to the ion optical guide rail;

[0009] a stepped shaft connected to the pole unit; and

[0010] A position detection component mounted on the vacuum component;

[0011] Wherein, an adjustment unit is also arranged in the accommodating chamber, and the adjustment unit comprises: a fixing part fixedly connected to the ion optical guide rail;

[0012] a movable portion disposed beside the fixed portion; and

[0013] At least three adjusting members, the adjusting members passing through the movable part and connected to the fixed part;

[0014] Under the action of the driving force, the adjusting member causes relative displacement between the movable part and the fixed part, which causes the annular seal to expand outward or rebound and shrink, so as to adjust the position of the adjusting unit, the ion optical guide and the pole unit in the vacuum chamber.

[0015] Preferably, the adjusting member is arranged in any one of a curve, ring or polygon shape.

[0016] Preferably, a sealing member is provided between the fixed portion and the movable portion.

[0017] Preferably, a first connecting portion is provided on the stepped shaft, and the stepped shaft is connected to the pole unit via the first connecting portion.

[0018] Preferably, the stepped shaft is further provided with a first shoulder and a stepped portion, the outer diameter of the first shoulder is greater than the outer diameter of the first connecting portion, and the stepped portion is stepped.

[0019] Preferably, the vacuum member is provided with an opening;

[0020] The position detection member is provided with a second connection portion, and the second connection portion is matched with the opening.

[0021] Preferably, the position detection member is further provided with a second shoulder, and the outer diameter of the second shoulder is larger than the inner diameter of the opening;

[0022] At least one hollow hole is formed on the second shoulder, and the hollow hole is communicated with the accommodating cavity.

[0023] Preferably, the position detection member is further provided with an observation portion, the interior of the observation portion is hollow to form a refuge chamber, and at least a portion of the pole unit is located in the refuge chamber.

[0024] Preferably, an observation hole is provided on the observation portion, and an observation port is provided on the stepped shaft, and the observation port is located in the observation hole.

[0025] One of the above technical solutions has the following advantages or beneficial effects: the present invention facilitates the position adjustment of the ion optical guide rail, and the operation is very simple. The ion optical guide rail is finally aligned with the interface, so that more ions are guided into the ion guide rod, which effectively improves the detection intensity and analysis accuracy of the mass spectrometer, and reduces the difference between mass spectrometers during the production and assembly process.

[0026] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0028] Figure 1 An exploded structural view of an ion optical guide rail adjustment device according to one embodiment of the present invention;

[0029] Figure 2 A cross-sectional view of an ion optical guide rail adjustment device according to one embodiment of the present invention;

[0030] Figure 3 A structural diagram of an adjustment unit according to an embodiment of the present invention;

[0031] Figure 4 A cross-sectional view of an adjustment unit according to an embodiment of the present invention;

[0032] Figure 5 A structural view of a stepped shaft according to an embodiment of the present invention;

[0033] Figure 6 A structural view of a position detection member according to an embodiment of the present invention;

[0034] Figure 7 FIG. 4 is a cross-sectional view of a position detecting member according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like components.

[0037] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "one" or "the" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] In the following description, words such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are defined relative to the structure shown in the drawings. In particular, "height" is equivalent to the dimension from top to bottom, "width" is equivalent to the dimension from left to right, and "depth" is equivalent to the dimension from front to back. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directions should not be interpreted as restrictive terms.

[0039] Terms related to attachment, coupling and the like (eg, "connected" and "attached") refer to a relationship in which structures are directly or indirectly fixed or attached to each other through intermediate structures, as well as a relationship in which they are movable or rigidly attached, unless expressly stated otherwise.

[0040] According to one embodiment of the present invention, Figures 1 to 7 As shown in the figure, it can be seen that the ion optical rail adjustment device 100 includes: a vacuum member 110, which is hollow inside to form a receiving chamber; an ion optical rail, which is arranged in the receiving chamber, a pole unit 120, at least part of the pole unit 120 is arranged in the receiving chamber, and the pole unit 120 is connected to the ion optical rail; a stepped shaft 130, which is connected to the pole unit 120; and a position detection member 140, which is installed on the vacuum member 110;

[0041] The accommodation chamber is further provided with an adjustment unit 150, the adjustment unit 150 comprising: a fixed portion (151), which is fixedly connected to the ion optical guide rail; a movable portion 152, which is arranged beside the fixed portion 151; and at least three adjustment members 153, the adjustment members 153 penetrate the movable portion 152 and are connected to the fixed portion 151;

[0042] Under the action of the driving force, the adjusting member 153 causes relative displacement between the movable portion 152 and the fixed portion 151, which causes the annular seal 154 to expand outward or rebound and shrink, so as to adjust the position of the adjusting unit, the ion optical guide rail and the pole unit 120 in the vacuum chamber 110.

[0043] Furthermore, the adjusting member 153 is arranged in any one of a curve, a ring or a polygon.

[0044] Specifically, for example, the adjusting members 153 are arranged in a curve shape; for another example, the adjusting members 153 are arranged in a ring shape; for another example, the adjusting members 153 are arranged in a polygonal shape.

[0045] The specific arrangement of the adjustment member 153 can be set by the staff according to the actual situation.

[0046] It can be understood that in the present invention, the adjusting member 153 is arranged in different ways so that the adjusting member 153 can adjust the position of the ion optical guide and the pole unit 120 in different situations, which has universality.

[0047] Furthermore, a sealing member 154 is disposed between the fixed portion 151 and the movable portion 152 .

[0048] It can be understood that under the action of the driving force, the adjusting member 153 causes a relative displacement between the movable portion 152 and the fixed portion 151, which causes the sealing ring to expand outward, and the deflection direction of the guide rail in the cavity can be adjusted by adjusting the tightness of the adjusting member 153.

[0049] In a preferred embodiment of the present invention, the adjusting member 153 is an adjusting screw.

[0050] In the embodiment of the present invention, the stepped shaft 130 is provided with an observation port 134 , a stepped portion 133 , a first shoulder portion 132 and a first connecting portion 131 in sequence along the axial direction thereof.

[0051] Furthermore, the stepped shaft 130 is connected to the pole unit 120 via a first connecting portion 131 .

[0052] Specifically, the outer diameter of the first connecting portion 131 is the same as the field circle diameter of the pole unit 120 , so that the first connecting portion 131 is completely inscribed in the pole unit 120 .

[0053] Furthermore, the outer diameter of the first shoulder 132 is greater than the outer diameter of the first connecting portion 131 , so as to limit the stepped shaft 130 and prevent the stepped shaft 130 from being further inserted into the pole unit 120 , thereby playing an axial positioning role.

[0054] Furthermore, the step portion 133 is in a step shape.

[0055] In an embodiment of the present invention, the outer diameter of the stepped portion 133 gradually decreases along the axial direction of the stepped shaft 130 to prevent stress concentration and deformation.

[0056] In the embodiment of the present invention, the position detecting member 140 is provided with an observation portion 143 , a second shoulder portion 142 and a second connecting portion 141 in sequence along the axial direction thereof.

[0057] Furthermore, an opening 111 is formed on the vacuum member 110 , and the second connecting portion 141 is adapted to the opening 111 .

[0058] Specifically, the outer diameter of the second connection portion 141 is the same as the inner diameter of the opening 111 , so that the second connection portion 141 is tightly matched with the opening 111 after being inserted into the vacuum member 110 .

[0059] Furthermore, the outer diameter of the second shoulder 142 is larger than the inner diameter of the opening 111, so as to prevent the position detection member 140 from being further inserted into the vacuum member 110, thereby playing an axial positioning role.

[0060] At least one hollow hole 1421 is defined on the second shoulder 142 , and the hollow hole 1421 is communicated with the accommodating cavity.

[0061] It can be understood that in the present invention, at least one hollow hole 1421 is provided on the second shoulder 142, so that during adjustment, the staff can use the hollow hole 1421 to reach into the accommodating cavity to adjust the position of the ion optical guide and the pole unit 120.

[0062] Furthermore, an observation portion 143 is also provided on the position detection member 140 . The observation portion 143 is hollow inside to form an escape chamber 1431 . At least a portion of the pole unit 120 is located in the escape chamber 1431 .

[0063] Furthermore, an observation hole 1432 is formed on the observation portion 143 , and an observation port 134 is provided on the stepped shaft 130 . The observation port 134 is located in the observation hole 1432 .

[0064] In a preferred embodiment of the present invention, the inner diameter of the observation hole 1432 is three times the outer diameter of the observation port 134 .

[0065] It can be understood that during installation and adjustment, it is only necessary to observe whether the observation port 134 is in the center of the observation hole 1432.

[0066] When the observation port 134 deviates from the center of the observation hole 1432, the staff adjusts the adjustment part 153 until the observation port 134 is at the center of the observation hole 1432, then removes the position detection part and the stepped shaft, installs the interface cone, and the coaxiality calibration of the ion optical axis of the mass spectrometer is completed.

[0067] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0068] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. An ion optical guide rail adjustment device, characterized in that: include: A vacuum member (110) having a hollow interior to form a receiving chamber; an ion optical guide rail, which is arranged in the accommodating chamber, A pole unit (120), at least a portion of the pole unit (120) is disposed in the accommodating cavity, and the pole unit (120) is connected to the ion optical guide rail; a stepped shaft (130) connected to the pole unit (120); and A position detection component (140) mounted on the vacuum component (110); Wherein, an adjustment unit (150) is also arranged in the accommodating chamber, and the adjustment unit (150) comprises: a fixing part (151) fixedly connected to the ion optical guide rail; a movable portion (152) disposed beside the fixed portion (151); and At least three adjusting members (153), wherein the adjusting members (153) penetrate the movable portion (152) and are connected to the fixed portion (151); Under the action of the driving force, the adjusting member (153) causes a relative displacement between the movable portion (152) and the fixed portion (151), causing the annular sealing member (154) to expand outward or rebound and contract, so as to adjust the positions of the adjusting unit, the ion optical guide rail and the pole unit (120) in the cavity of the vacuum member (110); The adjusting member (153) is arranged in any one of a curve, a ring or a polygon; A sealing member (154) is provided between the fixed portion (151) and the movable portion (152).

2. The ion optical guide rail adjustment device according to claim 1, characterized in that: The stepped shaft (130) is provided with a first connecting portion (131), and the stepped shaft (130) is connected to the pole unit (120) via the first connecting portion (131).

3. The ion optical guide rail adjustment device according to claim 2, characterized in that: The stepped shaft (130) is also provided with a first shoulder (132) and a stepped portion (133); the outer diameter of the first shoulder (132) is greater than the outer diameter of the first connecting portion (131); and the stepped portion (133) is in a stepped shape.

4. The ion optical guide rail adjustment device according to claim 1, characterized in that: The vacuum member (110) is provided with an opening (111); The position detection member (140) is provided with a second connection portion (141), and the second connection portion (141) is adapted to the opening (111).

5. The ion optical guide rail adjustment device according to claim 4, characterized in that: The position detection member (140) is also provided with a second shoulder (142), and the outer diameter of the second shoulder (142) is greater than the inner diameter of the opening (111); At least one hollow hole (1421) is formed on the second shoulder (142), and the hollow hole (1421) is communicated with the accommodating cavity.

6. The ion optical guide rail adjustment device according to claim 5, characterized in that: The position detection member (140) is also provided with an observation portion (143), the interior of the observation portion (143) is hollow to form an escape chamber (1431), and at least a portion of the pole unit (120) is located in the escape chamber (1431).

7. The ion optical guide rail adjustment device according to claim 6, characterized in that: The observation portion (143) is provided with an observation hole (1432), and the stepped shaft (130) is provided with an observation port (134), and the observation port (134) is located in the observation hole (1432).

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