Quadrupole rod for mass spectrometer

Abstract

The utility model discloses a quadrupole rod for a mass spectrometer, which belongs to the field of quadrupole rods and comprises an insulating fixing part, a through hole is arranged in the middle of the front surface of the insulating fixing part, concave fixing grooves are arranged at four corners of the insulating fixing part, and metal connecting sheets are fixedly mounted in rectangular grooves at the four corners of the insulating fixing part. A locking piece is fixedly installed in the middle of the upper surface of the metal connecting piece, the connecting assembly is arranged in the insulation fixing piece in a sleeved mode to be matched with the insulation fixing piece to fixedly install the four electrode rods, the gap error between every two adjacent electrode rods is controlled and kept within the range, and then assembling of the four-pole rod fixing device can be completed. According to the assembly of the quadrupole rod assembly and the insulation fixing piece and the assembly of the connecting assembly and the electrode rods, the assembly precision is high, the assembly process is simple and convenient, stray capacitance introduced by electrical connection between the electrode rods can be avoided through assembly, the qualified rate of machining production of the quadrupole rod can be improved, and then the production economic benefits of enterprises are improved.

Description

Technical Field

[0001] This utility model relates to the field of quadrupole technology, specifically a quadrupole for a mass spectrometer. Background Technology

[0002] The quadrupole mass analyzer is the core component of a quadrupole mass spectrometer. It is used to control the movement of charged ions or other charged particles. The quadrupole consists of four relatively parallel metal rods. The precision of the distance between two adjacent rods and the diameter of the quadrupole must be very high, and the error must be controlled within 1 micrometer. Two sets of metal rods are formed by two relatively parallel metal rods. Opposite voltages are applied to the two sets of metal rods. By scanning the electric field, ions with different mass-to-charge ratios can pass through the quadrupole sequentially to reach the detector and be detected, thereby achieving the purpose of mass separation and selection.

[0003] Traditional quadrupole mass analyzers are prone to introducing stray capacitance through wire connections, which increases the output power of the RF power supply. Furthermore, the assembly structure and process are relatively complex. Due to the extremely high assembly precision requirements of quadrupole mass analyzers, there are significant differences between different batches of assembled products, resulting in a low product qualification rate and a decline in the economic benefits of enterprise production.

[0004] Therefore, this invention provides a quadrupole for a mass spectrometer to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This invention provides a quadrupole for a mass spectrometer, aiming to solve the problems mentioned in the background art, such as the need to drill holes in the quadrupole, which leads to changes in the quadrupole structure and affects its performance.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: It includes an insulating fastener, with a through hole in the center of its front side and concave fixing grooves at each of its four corners. Metal connecting pieces are fixedly installed in the rectangular grooves at the four corners of the insulating fastener. A locking member is fixedly installed in the center of the upper surface of the metal connecting piece. One end of the locking member penetrates into the through hole of the insulating fastener. An electrode rod is connected through the through hole on the front side of the insulating fastener. A protruding connecting piece is provided at the bottom of the outer arc surface of the electrode rod. One end of the locking member is connected through the surface of the electrode rod. A hole is provided in the through hole on one side of the insulating fastener, and the hole is connected to the locking member.

[0009] As a preferred technical solution of this application, the number of electrode rods is four, which are sequentially inserted into the through hole. There are two insulating fasteners, one of which is placed at the front end of the electrode rod and the other is installed at the rear end of the electrode rod. A connecting component is fixedly installed in the through hole of the two insulating fasteners.

[0010] As a preferred technical solution of this application, the connecting assembly includes an outer sleeve fixedly installed inside the through hole, a reserved groove is provided in the middle of the inner arc surface of the outer sleeve, and an internal thread is provided on the side of the outer sleeve near the reserved groove.

[0011] As a preferred technical solution of this application, the inner arc surface of the outer sleeve is connected to a bushing by an internal thread, and the inner arc surface edge of the bushing is provided with a ramp section, the lower surface of the ramp section being movably pressed against the surface of the electrode rod.

[0012] As a preferred technical solution of this application, the outer arc surface of the bushing is provided with an external thread, which meshes with the internal thread, and the outer sleeve and the bushing are both movably mounted on the four electrode rods.

[0013] As a preferred technical solution of this application, a spring is movably connected to one side of the bushing, one end of the spring is placed in a reserved groove, and the spring is sleeved on the outer arc surface of the electrode rod.

[0014] As a preferred technical solution of this application, an insulating sleeve is movably overlapped on one side of the outer sleeve, and the number of the insulating sleeves is four, which are sequentially sleeved on each of the electrode rods.

[0015] (III) Beneficial Effects

[0016] By fitting the connecting component inside the insulating fastener and fixing the four electrode rods in place, and controlling the gap error between adjacent electrode rods within a specified range, the assembly of the quadrupole fixing device, the assembly of the quadrupole assembly with the insulating fastener, and the assembly of the connecting component with the electrode rods can be completed. This assembly has high precision, the assembly process is relatively simple, and the assembly can also avoid stray capacitance introduced by electrical connections between electrode rods, which is conducive to improving the pass rate of quadrupole processing and production, thereby improving the production and economic benefits of enterprises. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a quadrupole for a mass spectrometer.

[0018] Figure 2 This is a schematic diagram of the insulating fastener structure for a quadrupole mass spectrometer.

[0019] Figure 3This is a side view sectional diagram of a quadrupole for a mass spectrometer.

[0020] Figure 4 This is a schematic diagram showing the disassembled structure of a quadrupole connection assembly for a mass spectrometer.

[0021] Figure 5 This is a schematic cross-sectional view of a quadrupole connection assembly for a mass spectrometer.

[0022] In the picture:

[0023] 1. Insulating fastener; 2. Through hole; 3. Concave fixing groove; 4. Metal connecting piece; 5. Locking piece; 6. Electrode rod; 7. Protruding connecting piece; 8. Connecting assembly; 801. Outer sleeve; 802. Reserved groove; 803. Internal thread; 804. Bushing; 805. Inclined platform section; 806. External thread; 807. Spring; 808. Insulating sleeve. Detailed Implementation

[0024] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides a quadrupole for a mass spectrometer, such as Figures 1 to 5 As shown, the device includes an insulating fastener 1. A through hole 2 is provided in the center of the front of the insulating fastener 1. Concave fixing grooves 3 are provided at each of the four corners of the insulating fastener 1. Metal connecting pieces 4 are fixedly installed in the rectangular grooves at the four corners of the insulating fastener 1. A locking piece 5 is fixedly installed in the center of the upper surface of the metal connecting piece 4. One end of the locking piece 5 penetrates into the through hole 2 of the insulating fastener 1. An electrode rod 6 is connected through the through hole 2 on the front of the insulating fastener 1. A protruding connecting piece 7 is provided at the bottom of the outer arc surface of the electrode rod 6. One end of the locking piece 5 is connected through to the surface of the electrode rod 6. A hole is provided in the through hole 2 on one side of the insulating fastener 1, and the hole is connected to the locking piece 5. There are four electrode rods 6, which are sequentially inserted into the through hole 2. There are two insulating fasteners 1, one placed at the front end of the electrode rod 6 and the other installed at the rear end of the electrode rod 6. Connecting components 8 are fixedly installed in the through holes 2 of the two insulating fasteners 1.

[0026] The insulating fastener 1 is fitted onto the electrode rod 6 through the through hole 2. Then, four connecting components 8 are used to clamp the four electrode rods 6 and fix the distance between adjacent electrode rods 6. The hole matches the protruding connecting component 7 of the electrode rod 6. The insulating fastener 1 fixes the four electrode rods 6 and controls the gap error between adjacent electrode rods 6 within the specified range, thus completing the assembly of the quadrupole fixing device. The assembly of the electrode rods 6 and the insulating fastener 1 has high precision and the assembly process is relatively simple. Moreover, the insulating fastener 1 in the assembly structure can also avoid stray capacitance introduced by the electrical connection between the electrode rods 6, which is conducive to improving the qualification rate of quadrupole processing and production, thereby improving the production and economic benefits of enterprises.

[0027] The two electrode rods 6 are electrically connected by the metal connecting piece 4. The wire connection method of the metal connecting piece 4 can effectively shorten the wire connection length, further avoid the introduction of stray capacitance, and thus stabilize the output power of the RF power supply.

[0028] The connecting assembly 8 includes an outer sleeve 801 fixedly installed inside the through hole 2. A pre-reserved groove 802 is provided in the middle of the inner arc surface of the outer sleeve 801. An internal thread 803 is provided on the side of the outer sleeve 801 near the pre-reserved groove 802. A bushing 804 is connected to the inner arc surface of the outer sleeve 801 via the internal thread 803. A ramp section 805 is provided at the edge of the inner arc surface of the bushing 804. The lower surface of the ramp section 805 movably abuts against the surface of the electrode rod 6. The outer arc surface of the bushing 804... An external thread 806 is provided, which meshes with an internal thread 803. An outer sleeve 801 and a bushing 804 are movably mounted on four electrode rods 6. A spring 807 is movably attached to one side of the bushing 804. One end of the spring 807 is placed in a reserved groove 802 and is sleeved on the outer arc surface of the electrode rod 6. An insulating sleeve 808 is movably attached to one side of the outer sleeve 801. There are four insulating sleeves 808, which are sequentially sleeved on each electrode rod 6.

[0029] As described above, when using the connecting assembly 8, the electrode rod 6 is pulled out to the desired position. Since the diameter of the electrode rod 6 is smaller than the inner diameter of the bushing 804 and the spring 807, the bushing 804 will not obstruct the assembly of the electrode rod 6 when it is not compressed. After the electrode rod 6 is pulled out to the desired position, one end of the electrode rod 6 extends to the outside of the outer sleeve 801. The fit between the inner thread 803 and the outer thread 806 is tightened. During the downward movement of the outer sleeve 801, the force transmission relationship is that the reserved groove 802 compresses the spring 807, bringing it close to the bushing 804, allowing its inclined section 805 to compress it. Only the spring... Spring 807 has a deformable function. Bushing 804 applies force to spring 807 in contact with one end of it. In addition, spring 807 is placed on bushing 804 and reserved groove 802 respectively. Therefore, this force will cause the two springs 807 to contract and deform along the slope, thereby tightly holding the electrode rod 6 inside. The inclined platform section 805 inside bushing 804 is an elastic structure. After the electrode rod 6 passes through, because the diameter of electrode rod 6 is larger than the diameter of inclined platform section 805, it will be first stretched open after insertion. Then, due to the elastic action, the electrode rod 6 is compressed, thereby completing the fixation of the end and achieving the function of fixing and locking electrode rod 6.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quadrupole for a mass spectrometer, comprising an insulating fixing component (1), characterized in that: The insulating fastener (1) has a through hole (2) in the center of its front side, and concave fixing grooves (3) are provided at the four corners of the insulating fastener (1). Metal connecting pieces (4) are fixedly installed in the rectangular grooves at the four corners of the insulating fastener (1). Locking pieces (5) are fixedly installed in the center of the upper surface of the metal connecting pieces (4). One end of the locking piece (5) passes through the through hole (2) of the insulating fastener (1). An electrode rod (6) is connected through the through hole (2) on the front side of the insulating fastener (1). A protruding connecting piece (7) is provided at the bottom of the outer arc surface of the electrode rod (6). One end of the locking piece (5) is connected through the surface of the electrode rod (6). A hole is provided in the through hole (2) on one side of the insulating fastener (1). The hole is connected to the locking piece (5).

2. The quadrupole for a mass spectrometer according to claim 1, characterized in that: The number of electrode rods (6) is four, and they are inserted into the through hole (2) in sequence. There are two insulating fasteners (1), one of which is placed at the front end of the electrode rod (6) and the other is installed at the rear end of the electrode rod (6). A connecting component (8) is fixedly installed in the through hole (2) of the two insulating fasteners (1).

3. A quadrupole for a mass spectrometer according to claim 2, characterized in that: The connecting assembly (8) includes an outer sleeve (801) fixedly installed inside the through hole (2). A reserved groove (802) is provided in the middle of the inner arc surface of the outer sleeve (801), and an internal thread (803) is provided on the side of the outer sleeve (801) near the reserved groove (802).

4. A quadrupole for a mass spectrometer according to claim 3, characterized in that: The inner arc surface of the outer sleeve (801) is connected to a bushing (804) by an internal thread (803). The inner arc surface edge of the bushing (804) is provided with a ramp section (805), and the lower surface of the ramp section (805) is movably pressed against the surface of the electrode rod (6).

5. A quadrupole for a mass spectrometer according to claim 4, characterized in that: The bushing (804) has an external thread (806) on one side of its outer arc surface. The external thread (806) is engaged with the internal thread (803). The outer sleeve (801) and the bushing (804) are both movably mounted on the four electrode rods (6).

6. A quadrupole for a mass spectrometer according to claim 5, characterized in that: A spring (807) is movably connected to one side of the bushing (804), one end of the spring (807) is placed in the reserved groove (802), and the spring (807) is sleeved on the outer arc surface of the electrode rod (6).

7. A quadrupole for a mass spectrometer according to claim 6, characterized in that: An insulating sleeve (808) is movably overlapped on one side of the outer sleeve (801). There are four insulating sleeves (808), which are sequentially sleeved on each of the electrode rods (6).

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