Hyperboloid Quadrupole Device, System and Manufacturing Method

Abstract

This application provides a hyperboloid quadrupole device, system, and manufacturing method thereof. The hyperboloid quadrupole device includes: at least one quadrupole and a fixing structure; the fixing structure includes: a fixing base, a positioning ball, a spring, and a fastening screw; one side of the outer surface of the quadrupole is a hyperboloid, and the other side is a circular surface. A pair of parallel planes are arranged between the hyperboloid and the plane, and the four surfaces together form the outer surface of the quadrupole; the fixing base is a three-dimensional columnar structure with a hollow center, and the quadrupole is disposed inside the fixing base, with the circular surface of the outer surface of the quadrupole mating with the inner surface of the fixing base. This application, through the design of the hyperboloid quadrupole, can generate a more ideal hyperboloid electric field, reduce the influence of higher-order fields, avoid charged particle trajectory deviation, and improve the resolution and sensitivity of the mass spectrometer.

Description

Technical Field

[0001] This application relates to the field of analytical testing instrument structural design technology, specifically to a hyperboloid quadrupole device, system, and manufacturing method thereof. Background Technology

[0002] In a quadrupole mass spectrometer, four poles manipulate the motion of charged particles by applying a combination of alternating and direct current electric fields, thereby achieving mass separation of ions. Under ideal conditions, the four poles should be able to generate a hyperbolic electric field, which can accurately guide and separate ions with different mass-to-charge ratios.

[0003] Most existing quadrupole mass analyzers use cylindrical poles, primarily because this shape is easier to manufacture. However, cylindrical poles generate higher-order fields during the electric field generation process, leading to electric field distortion and affecting the resolution and sensitivity of the mass spectrometer. The presence of these higher-order fields causes charged particle trajectories to deviate from ideal paths, reducing analytical accuracy.

[0004] Compared to cylindrical electrodes, hyperboloid electrodes can generate a more ideal hyperboloid electric field, avoiding the generation of higher-order fields and thus improving the resolution and sensitivity of the mass spectrometer. However, hyperboloid electrodes require high machining precision, especially in terms of length, surface finish, and positioning accuracy. Existing slow wire EDM precision cutting methods have some drawbacks, such as limited length, low surface finish, and high machining difficulty.

[0005] Currently, there is an urgent need in the industry for a hyperboloid quadrupole device that can improve the length, surface finish, and positioning accuracy of the quadrupole to enhance the performance of mass spectrometers, especially in high-precision mass spectrometry analysis.

[0006] Prior art, patent number CN118366844A, discloses a differential quadrupole array and a mass spectrometer incorporating the differential quadrupole array. The differential quadrupole array includes multiple sets of differential quadrupoles, each set comprising four metal plates extending in the radial plane of the array and having the same contour line. The four metal plates are arranged rotationally symmetrically in the radial plane. The multiple sets of differential quadrupoles are arranged sequentially and aligned along the axial direction to form an ion transport channel extending along the axial direction. Each set of differential quadrupoles is individually controlled by a digital drive circuit. This prior art differential quadrupole array and the mass spectrometer incorporating it are easy to manufacture and can perform multiple functions within the same mass spectrometer, including ion acceleration / deceleration, ion convergence / divergence, ion selection, ion collision, linear ion trapping, and ion mobility separation, and the order of these functions can be defined as needed. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the purpose of this application is to provide a hyperboloid quadrupole device, system and manufacturing method thereof.

[0008] A hyperboloid quadrupole device according to this application includes: at least one pole and a fixing structure;

[0009] The fixing structure includes: a fixing base, a positioning ball, a spring, and a fastening screw;

[0010] One side of the outer surface of the pole is a hyperboloid and the other side is a circular surface. A pair of parallel planes are provided between the hyperboloid and the plane. The four surfaces together form the outer surface of the pole.

[0011] The fixing base is a three-dimensional columnar structure with a hollow center. The pole rod is disposed inside the fixing base, and the circular surface of the outer surface of the pole rod mates with the inner surface of the fixing base.

[0012] One end of the spring contacts the outer surface of the pole rod; the other end contacts the positioning ball.

[0013] The inner wall of the fixing base is provided with a spherical small groove and a circular large groove. The positioning ball cooperates with the spherical small groove, and the circular outer surface of the pole rod cooperates with the fixing base through the circular large groove.

[0014] The mounting base is connected to the pole rod by fastening screws.

[0015] Preferably, the pole rod is made of molybdenum-rhenium alloy, and the fixing seat and positioning ball are made of ceramic material.

[0016] Preferably, the vertex of the hyperboloid and the central axis of the pole form the central symmetry plane of the pole, and the threaded hole of the pole is located at the intersection of the central symmetry plane of the pole and the circular surface of the pole.

[0017] Preferably, the ceramic material is 99% alumina ceramic.

[0018] Preferably, the diameter of the large circular groove is the same as the diameter of the circle on the outer surface of the pole.

[0019] Preferably, the positioning ball has micron-level precision.

[0020] The hyperboloid quadrupole device provided in this application includes four poles, each pole being arranged at a 90-degree interval inside the fixed base.

[0021] Preferably, the centers of the spherical small groove, the circular large groove, and the inner circle of the fixing seat are all collinear in the opposite arrangement.

[0022] This application also provides a method for manufacturing a hyperboloid quadrupole, which can manufacture the above-mentioned hyperboloid quadrupole device, and includes the following steps:

[0023] Step 1: Prepare molybdenum-rhenium alloy rods and machine a through hole in the center of the rods. The diameter of the through hole is about 1 / 3 to 2 / 5 of the outer diameter of the pole rod.

[0024] Step 2: Use grinding technology to process the bar stock so that one side of the pole rod is circular and the other side is hyperboloid. Two parallel planes are machined between the circular surface and the hyperboloid.

[0025] Step 3: Prepare 99% alumina ceramic material and make a three-dimensional circular fixing base. Evenly machine several large-diameter grooves on the inner ring of the fixing base. Then, further machine small-diameter grooves on the basis of the already machined large-diameter grooves. The diameter of the large-diameter groove is the same as the circular diameter of the pole rod, and the diameter of the small-diameter groove is the same as the diameter of the positioning ball.

[0026] Step 4: Machine a spherical positioning hole on the circular surface of each pole rod, the diameter of the positioning hole being the same as the diameter of the positioning ball;

[0027] Step 5: Install the compression spring in the positioning hole, and sequentially insert the prepared spring and positioning ball into the circular positioning hole of the pole rod;

[0028] Step 6: Assemble the pole rod containing the positioning ball and spring onto the fixed base;

[0029] Step 7: Secure the pole to the mounting base using machined fastening screws.

[0030] This application also provides a hyperboloid quadrupole system, including the above-described hyperboloid quadrupole device.

[0031] Compared with the prior art, this application has the following beneficial effects:

[0032] 1. This application, through the design of hyperboloid poles, can generate a more ideal hyperboloid electric field, reduce the influence of higher-order fields, avoid the trajectory deviation of charged particles, and improve the resolution and sensitivity of the mass spectrometer.

[0033] 2. This application employs precision positioning ceramic balls and ceramic mounting bases, with spring pressure applied to ensure the accurate relative position of the quadrupoles, preventing angular changes during use. This precise positioning system improves the stability of the electric field and ensures consistent instrument performance.

[0034] 3. This application utilizes grinding technology to achieve a surface finish of 0.4 micrometers for the electrode rod. This not only improves the processing quality of the electrode rod but also significantly reduces the impact of surface roughness on electric field uniformity, further enhancing the performance of the mass spectrometer. Attached Figure Description

[0035] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0036] Figure 1 This application mainly illustrates the cross-sectional view of the hyperboloid quadrupole device structure;

[0037] Figure 2 This is a right-side schematic diagram of the hyperboloid quadrupole device, which is the main feature of this application.

[0038] 1. Pole rod; 2. Fixing base; 3. Fastening screw; 4. Positioning ball; 5. Spring; 6. Spherical small groove; 7. Circular large groove; 8. Pole rod plane; 9. Pole rod center through hole. Detailed Implementation

[0039] The present application will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.

[0040] The hyperboloid quadrupole 1 device provided in this application includes: at least one pole 1 and a fixing structure; the fixing structure includes: a fixing seat 2, a positioning ball 4, a spring 5 and a fastening screw 3; one side of the outer surface of the pole 1 is a hyperboloid and the other side is a circular surface, and a pair of parallel planes are provided between the hyperboloid and the plane, and the four surfaces together form the outer surface of the pole 1.

[0041] The fixing base 2 is a three-dimensional columnar structure with a hollow center. The pole rod 1 is located inside the fixing base 2, and the circular surface of the outer surface of the pole rod 1 mates with the inner surface of the fixing base 2. One end of the spring 5 contacts the outer surface of the pole rod 1, and the other end contacts the positioning ball 4. The inner wall of the fixing base 2 is provided with a spherical small groove 6 and a circular large groove 7. The positioning ball 4 mates with the spherical small groove 6, and the circular outer surface of the pole rod 1 mates with the fixing base 2 through the circular large groove 7.

[0042] The fixing seat 2 is connected to the pole 1 by fastening screws 3. The pole 1 is made of molybdenum-rhenium alloy, while the fixing seat 2 and the positioning ball 4 are made of ceramic. The vertex of the hyperboloid and the central axis of the pole 1 form the central symmetry plane of the pole 1, and the threaded hole of the pole 1 is located at the intersection of the central symmetry plane of the pole 1 and the circular surface of the pole 1.

[0043] The ceramic material is specifically 99% alumina ceramic. The diameter of the large circular groove 7 is the same as the diameter of the circular shape on the outer surface of the pole 1. The positioning ball 4 has micron-level precision.

[0044] The hyperboloid quadrupole device 1 provided in this application includes four poles 1, each pole 1 being arranged at 90-degree intervals inside the fixed base 2. The centers of the spherical small groove 6, the circular large groove 7, and the inner circle of the fixed base 2 are all collinear.

[0045] This application also provides a method for manufacturing a hyperboloid quadrupole 1. Using this method, the above-mentioned hyperboloid quadrupole 1 device can be manufactured, and the method includes the following steps:

[0046] Step 1: Prepare molybdenum-rhenium alloy rods and machine a through hole in the center of the rods. The diameter of the through hole is about 1 / 3 to 2 / 5 of the outer diameter of pole rod 1.

[0047] Step 2: Use grinding technology to process the bar stock so that one side of the pole rod 1 is circular and the other side is hyperboloid. Two parallel planes are machined between the circular surface and the hyperboloid.

[0048] Step 3: Prepare 99% alumina ceramic material and make a three-dimensional circular fixing seat 2. Evenly process several large-diameter grooves on the inner ring of the fixing seat 2. Then, further process small-diameter grooves on the basis of the already processed large-diameter grooves. The diameter of the large-diameter grooves is the same as the circular diameter of the pole rod 1, and the diameter of the small-diameter grooves is the same as the diameter of the positioning ball 4.

[0049] Step 4: Machining a spherical positioning hole on the circular surface of each pole 1, the diameter of the positioning hole being the same as the diameter of the positioning ball 4;

[0050] Step 5: Install the compression spring 5 in the positioning hole, and install the prepared spring 5 and positioning ball 4 into the circular positioning hole of the pole rod 1 in sequence;

[0051] Step 6: Assemble the pole rod 1, which contains the positioning ball 4 and the spring 5, onto the fixed base 2;

[0052] Step 7: Use the machined fastening screws 3 to securely fix the pole 1 to the fixing base 2.

[0053] This application also provides a hyperboloid quadrupole 1 system, including the hyperboloid quadrupole 1 device described above.

[0054] The following is a feasible embodiment of this application.

[0055] A hyperboloid quadrupole device includes: a pole 1, a fixing base 2, a fastening screw 3, a positioning ball 4, and a spring 5.

[0056] There are four pole rods 1, each identical. The pole rod material is a molybdenum-rhenium alloy, and the blank is a bar stock with a central through hole 9. After machining, one side of the pole rod 1 is circular, and the other side is a hyperboloid. The cross-section of the pole rod is axisymmetric, with the plane of symmetry being the plane containing the vertex of the hyperboloid and the central axis of the pole rod. Between the circular and hyperboloid surfaces of the pole rod 1, there is a pair of pole rod planes 8. Each pole rod plane 8 is parallel to the aforementioned plane of symmetry. The pole rod planes 8 serve as positioning references during the grinding of the pole rod 1, and also as positioning references for the threaded holes and positioning holes on the pole rod 1.

[0057] There are two identical mounting bases 2. Mounting base 2 has a ring-shaped structure made of 99% alumina ceramic. On the inner ring, four large-diameter grooves 7 and four small-diameter grooves 6 are evenly distributed at 90-degree intervals. The centers of the small-diameter grooves 6, the large-diameter grooves 7, and the ceramic mounting base 2 are all collinear. The diameter of the large-diameter groove 7 is the same as the circular diameter of the pole rod 1, used for mounting the pole rod 1; the diameter of the small-diameter groove 6 is the same as the diameter of the ceramic positioning ball 4, used for mounting the ceramic positioning ball 4.

[0058] The positioning ball 4, with micron-level precision, is installed in the circular positioning hole of the pole rod 1. A spring 5 is installed in the positioning hole to provide elasticity to the positioning ball 4, so as to fit into the small-diameter groove 6 on the fixing seat 2, thereby limiting the rotation angle of the pole rod 1 relative to the ceramic fixing seat 2.

[0059] The fastening screw 3 is a machined screw with a higher precision grade of thread teeth than ordinary screws, forming a precise engagement with the threaded hole of the pole rod 1.

[0060] During the assembly of the hyperboloid quadrupole described in this invention, a spring 5 and a positioning ball 4 are installed on the pole 1. By controlling the size of the spring 5, sufficient ejection force can be provided to the positioning ball 4. The positioning ball 4 is pressed into the round hole of the pole 1, and then the pole 1 is assembled with the fixing seat 2. The positioning ball 4 slides into the small-diameter groove 6 of the fixing seat 2, and the fastening screw 3 is tightened to complete the assembly.

[0061] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0062] The specific embodiments of this application have been described above. It should be understood that this application is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this application. Unless otherwise specified, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other.

Claims

1. A method for manufacturing a hyperboloid quadrupole, characterized in that, Includes the following steps: Step 1: Prepare molybdenum-rhenium alloy rods and machine a through hole in the center of the rods. The diameter of the through hole is 1 / 3 to 2 / 5 of the outer diameter of the pole rod (1). Step 2: Use grinding technology to process the bar stock so that one side of the pole rod (1) is a circular surface and the other side is a hyperboloid. Two parallel planes are processed between the circular surface and the hyperboloid. Step 3: Prepare 99% alumina ceramic material and make a three-dimensional circular ring fixing seat (2). Evenly process several large circular grooves (7) on the inner ring of the fixing seat (2). Then, further process small spherical grooves (6) on the basis of the already processed large circular grooves (7). The diameter of the large circular grooves (7) is the same as the diameter of the circular surface of the pole rod (1). The diameter of the small spherical grooves (6) is the same as the diameter of the positioning ball (4). The centers of the inner circles of the small spherical grooves (6), the large circular grooves (7) and the fixing seat (2) are collinear. Step 4: A spherical positioning hole is machined on the circular surface of each pole (1), and the diameter of the positioning hole is the same as the diameter of the positioning ball (4); Step 5: Install the compression spring (5) in the positioning hole, and install the prepared spring (5) and positioning ball (4) into the circular positioning hole of the pole rod (1) in sequence; Step 6: Assemble the pole rod (1) containing the positioning ball (4) and spring (5) onto the fixed seat (2); Step 7: Use machined fastening screws (3) to securely fix the pole (1) to the fixing seat (2).

2. A hyperboloid quadrupole device, characterized in that, The hyperboloid quadrupole manufacturing method described in claim 1 includes: at least one pole (1) and a fixing structure; The fixing structure includes: a fixing seat (2), a positioning ball (4), a spring (5), and a fastening screw (3); One side of the outer surface of the pole rod (1) is a hyperboloid and the other side is a circular surface. A pair of parallel planes are provided between the hyperboloid and the circular surface. The four surfaces together form the outer surface of the pole rod (1). The fixed base (2) is a three-dimensional columnar structure with a hollow center. The pole rod (1) is located inside the fixed base (2), and the circular surface of the outer surface of the pole rod (1) is in contact with the inner surface of the fixed base (2). One end of the spring (5) is in contact with the outer surface of the pole rod (1); the other end is in contact with the positioning ball (4); The inner wall of the fixed seat (2) is provided with a spherical small groove (6) and a circular large groove (7). The positioning ball (4) cooperates with the spherical small groove (6). The circular surface of the pole rod (1) cooperates with the fixed seat (2) through the circular large groove (7). The fixed base (2) is connected to the pole (1) by fastening screws (3).

3. The hyperboloid quadrupole device as described in claim 2, characterized in that, The pole rod (1) is made of molybdenum-rhenium alloy, and the fixing seat (2) and positioning ball (4) are made of ceramic.

4. The hyperboloid quadrupole device as described in claim 2, characterized in that, The vertex of the hyperboloid and the central axis of the pole rod (1) form the central symmetry plane of the pole rod (1), and the threaded hole of the pole rod (1) is located at the intersection of the central symmetry plane of the pole rod (1) and the circular surface of the pole rod (1).

5. The hyperboloid quadrupole device as described in claim 3, characterized in that, The ceramic material is specifically 99% alumina ceramic.

6. The hyperboloid quadrupole device as described in claim 2, characterized in that, The diameter of the large circular groove (7) is the same as the diameter of the circle on the outer surface of the pole (1).

7. The hyperboloid quadrupole device as described in claim 2, characterized in that, The positioning ball (4) has micron-level precision.

8. The hyperboloid quadrupole device as described in claim 2, characterized in that, It includes four poles (1), each pole (1) being arranged at 90-degree intervals inside the fixing base (2).

9. A hyperboloid quadrupole system, characterized in that, Includes the hyperboloid quadrupole device as described in any one of claims 2-8.

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