Mass spectrometer flight tube temperature control device

Abstract

The utility model discloses a mass spectrometer flight tube temperature control device which comprises a flight tube which is vertically installed at the upper end of a connector, an end cover used for sealing is fixed at the upper end of the flight tube, an arc-shaped guide groove is formed in the outer portion of the upper end of the end cover in a penetrating mode, and the flight tube comprises a heat conduction tube and a heat insulation inner tube. The thermal insulation inner pipe is coaxially arranged on the outer side of the thermal conduction pipe at intervals, the upper end of the thermal conduction pipe and the upper end of the thermal insulation inner pipe are fixedly connected with the end cover, the lower end of the thermal conduction pipe is fixedly connected with the connector, and a temperature adjusting mechanism is arranged between the thermal conduction pipe and the thermal insulation inner pipe and used for adjusting the internal environment temperature of the flight pipe in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of molecular mass spectrometry detection, in particular to a temperature control device for a flight tube of a mass spectrometer. Background Art

[0002] As an essential tool in chemical analysis, mass spectrometers are widely used in scientific research, environmental monitoring, food safety, biomedicine, and other fields. The flight tube is one of the core components of a mass spectrometer, and its performance directly impacts the instrument's resolution and sensitivity. During use, the flight tube is affected by ambient humidity and temperature, requiring internal temperature control to improve the sensitivity of the mass spectrometer.

[0003] The existing mass spectrometer flight tube, when controlling the internal temperature, is affected by the location of its heating device, resulting in temperature differences between various parts of the tube during the heating process. This can affect ions during flight due to thermal diffusion or convection, causing their trajectories to deviate from their intended paths. Furthermore, when the internal temperature of the mass spectrometer flight tube is too high, air cooling is difficult to achieve synchronous cooling of the entire tube. This results in a temperature difference between the heat dissipation end and the opposite end of the tube during the cooling process, affecting the flight trajectory of ions within the tube and, consequently, the mass spectrometer's detection results.

[0004] Therefore, it is necessary to provide a mass spectrometer flight tube temperature control device to solve the problems mentioned in the above background technology. Utility Model Content

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mass spectrometer flight tube temperature control device, comprising:

[0006] A flight tube is vertically mounted on the upper end of the joint. A sealing end cap is fixed to the upper end of the flight tube. An arc-shaped guide groove is formed through the upper exterior of the end cap. The flight tube includes a thermal conductive tube and an insulating inner tube. The insulating inner tube is coaxially spaced apart and disposed outside the thermal conductive tube. The upper ends of the thermal conductive tube and the insulating inner tube are both fixedly connected to the end cap. The lower end of the thermal conductive tube is fixedly connected to the joint. A temperature regulating mechanism is provided between the thermal conductive tube and the insulating inner tube for real-time adjustment of the ambient temperature within the flight tube.

[0007] The temperature adjustment mechanism comprises:

[0008] an isolation cover coaxially fixed on the outer side of the lower end portion of the flight tube and fixedly connected to the joint;

[0009] A turntable is rotatably sleeved on the outer side of the temperature conducting tube via a bearing, and a gear ring is sleeved on the outer side of the turntable;

[0010] a driving gear, which is rotatably disposed on one side of the ring gear and meshes with the ring gear for transmission; and

[0011] The heating resistor plate is an arc-shaped plate structure. The heating resistor plate is vertically arranged on the upper end of the turntable, and a plurality of heating resistor plates are evenly spaced. The heating resistor plates are driven by a controller.

[0012] As a preferred technical solution of the present invention, a plurality of arc-shaped guide vanes are evenly and vertically arranged between the heating resistor plates on the upper end of the turntable, and the guide vanes are made of insulating material.

[0013] As an optimal technical solution of the present invention, a plurality of heat-conducting strips are evenly spirally arranged on the outer circumference of the thermal conductive tube, a plurality of strip-shaped heat dissipation holes are opened on the circumference of the thermal insulation inner tube along its axial direction, and a heat dissipation adjustment mechanism can also be rotatably arranged on the outer side of the thermal insulation inner tube.

[0014] As an optimal technical solution of the present invention, the heat dissipation adjustment mechanism includes: a telescopic cylinder, one end of which is hinged to the upper end of the end cover, and the other end of the telescopic cylinder is rotatably installed with a positioning shaft, and the positioning shaft passes downward through the arc guide groove and is rotatably set at the upper end of the thermal insulation outer tube, and the thermal insulation outer tube is sealed and rotatably matched with the thermal insulation inner tube, and the thermal insulation outer tube is provided with a second heat dissipation hole of the same specification as the heat dissipation hole.

[0015] As a preferred technical solution of the present invention, the width of the tube wall between adjacent second heat dissipation holes is greater than the spacing between the first heat dissipation holes.

[0016] As a preferred technical solution of the present invention, an ion detector is installed on the upper inner portion of the temperature conducting tube for detecting ions passing through the flight path.

[0017] As a preferred technical solution of the present invention, the upper end of the end cover is connected to the interior of the thermal conductive tube and is detachably mounted with an ion trap.

[0018] As a preferred technical solution of the present invention, a thermal insulation sealing layer is adhered to the outer side of the thermal insulation inner tube, which can form a seal between the tube walls of the thermal insulation outer tube and the thermal insulation inner tube.

[0019] Compared with the prior art, the present invention provides a mass spectrometer flight tube temperature control device, which has the following beneficial effects:

[0020] In the present invention, a temperature regulating mechanism is provided to rotate and heat the circumference of the heat conducting tube, thereby ensuring uniform heat conduction throughout the tube during the heating process, avoiding temperature differences at different locations that could affect the flight trajectory of ions, and improving the relative stability of the ambient temperature at various locations within the tube during heating. Furthermore, a relatively rotatable insulating inner tube and an insulating outer tube are provided, each of which has multiple heat dissipation holes formed circumferentially therefrom. A heat dissipation regulating mechanism is provided to synchronously control the opening and closing of these heat dissipation holes. When the ambient temperature within the tube needs to be lowered, the multiple heat dissipation holes dissipate heat simultaneously, preventing heat accumulation at the heat dissipation holes and improving the relative stability of the ambient temperature at various locations within the tube during cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a mass spectrometer flight tube temperature control device;

[0022] Figure 2 This is a schematic diagram of the temperature control mechanism structure of a mass spectrometer flight tube temperature control device;

[0023] Figure 3 This is a schematic diagram of the heat dissipation adjustment mechanism structure of a mass spectrometer flight tube temperature control device;

[0024] Figure 4 This is a schematic diagram of a top-down cross-sectional structure of a temperature control device for a mass spectrometer flight tube;

[0025] In the figure: 1. Flight tube; 11. Thermal conduction tube; 12. Insulation inner tube; 13. Heat conduction strip; 2. Temperature adjustment mechanism; 21. Isolation cover; 22. Turntable; 23. Heating resistor plate; 24. Ring gear; 25. Driving gear; 26. Guide vane; 27. Heat dissipation adjustment mechanism; 28. Controller; 271. Telescopic cylinder; 272. Positioning shaft; 273. Insulation outer tube; 274. Heat dissipation hole 2; 3. End cover; 31. Arc guide groove; 4. Connector; 5. Ion trap. DETAILED DESCRIPTION

[0026] See also Figure 1-4 The utility model provides a mass spectrometer flight tube temperature control device, comprising:

[0027] A flight tube 1 is mounted vertically on the upper end of a joint 4. A sealing end cap 3 is fixed to the upper end of the flight tube 1. An arc-shaped guide groove 31 is formed through the upper exterior of the end cap 3. The flight tube 1 includes a thermally conductive tube 11 and an insulating inner tube 12. The insulating inner tube 12 is coaxially spaced apart and disposed outside the thermally conductive tube 11. The upper ends of the thermally conductive tube 11 and the insulating inner tube 12 are both fixedly connected to the end cap 3. The lower end of the thermally conductive tube 11 is fixedly connected to the joint 4. A temperature control mechanism 2 is provided between the thermally conductive tube 11 and the insulating inner tube 12 for real-time adjustment of the ambient temperature within the flight tube 1.

[0028] The temperature adjustment mechanism 2 includes:

[0029] An isolation cover 21 is coaxially fixed on the outer side of the lower end of the flight tube 1 and is fixedly connected to the joint 4;

[0030] A turntable 22 is rotatably sleeved on the outside of the temperature conducting tube 11 via a bearing, and a gear ring 24 is sleeved on the outside of the turntable 22;

[0031] a driving gear 25 rotatably disposed on one side of the ring gear 24 and meshing with the ring gear 24 for transmission; and

[0032] The heating resistor plate 23 is an arc-shaped plate structure. The heating resistor plate 23 is vertically arranged on the upper end of the turntable 22 , and a plurality of the heating resistor plates 23 are evenly spaced. The heating resistor plates 23 are driven by a controller 28 .

[0033] It needs to be explained that, Figure 1 、 2 As shown, the connector 4 connects the vacuum chamber and the ion emitter. The ion emitter can emit the ions to be tested into the temperature conducting tube 11 at a set speed trajectory. During detection, the ambient temperature in the flight tube 1 is regulated by controlling the temperature regulating mechanism 2 so that the ambient temperature meets the detection requirements, and then the ions to be tested are emitted into the flight tube 1 through the ion emitter for detection.

[0034] Among them, when the inside of the flight tube 1 is heated, the driving gear 25 is driven by the external motor to rotate, driving the ring gear 24, the turntable 22 and the heating resistor plate 23 to rotate rapidly along the circumference of the temperature conducting tube 11 for heating, so that the temperature of the temperature conducting tube 11 can be evenly heated, avoiding the fixed position of the heating device causing uneven temperature rise in various parts of the flight tube 1 during heating, affecting the flight trajectory of the ions, and improving the relative stability of the ambient temperature at various parts of the flight tube 1 during heating.

[0035] In this embodiment, a plurality of arc-shaped guide vanes 26 are evenly and vertically arranged between the heating resistor plates 23 on the upper end of the turntable 22 , and the guide vanes 26 are made of insulating material.

[0036] It needs to be explained that, Figure 2 、 4 As shown, when the heating resistor plate 23 rotates and moves for heating (rotates counterclockwise), the guide blades 26 can guide the heat during the rotation process, so that it moves quickly to the surface of the heat conducting tube 11, thereby improving the heat conducting effect of the heat conducting tube 11.

[0037] In this embodiment, the outer circumference of the thermally conductive tube 11 is uniformly and spirally arranged with a plurality of heat-conducting strips 13. The circumference of the thermally insulating inner tube 12 is provided with a plurality of strip-shaped heat dissipation holes along its axis. A heat dissipation adjustment mechanism 27 is rotatably mounted on the outer side of the thermally insulating inner tube 12. The provision of the heat-conducting strips 13 increases the heat-absorbing and heat-dissipating surface area of ​​the thermally conductive tube 11, thereby improving the efficiency of the temperature adjustment mechanism 2 in regulating the ambient temperature within the flight tube 1.

[0038] In this embodiment, the heat dissipation adjustment mechanism 27 includes: a telescopic cylinder 271, one end of which is hinged to the upper end of the end cover 3, and the other end of the telescopic cylinder 271 is rotatably installed with a positioning shaft 272, and the positioning shaft 272 passes downward through the arc guide groove 31 and is rotatably set at the upper end of the thermal insulation outer tube 273, and the thermal insulation outer tube 273 is sealed and rotatably matched with the thermal insulation inner tube 12, and the thermal insulation outer tube 273 is provided with a heat dissipation hole 274 of the same specification as the heat dissipation hole.

[0039] In this embodiment, the width of the tube wall between adjacent second heat dissipation holes 274 is greater than the spacing between the first heat dissipation holes.

[0040] It needs to be explained that, Figure 3 、 4 As shown, in the initial state, when the flight tube 1 is heated, the telescopic cylinder 271 is telescopically driven to rotate the thermal insulation outer tube 273 to seal the heat dissipation hole 1 using its tube wall. At this time, the heat generated by the heating resistor plate 23 is sealed in the tube by the thermal insulation outer tube 273 and the thermal insulation inner tube 12, and can only be transmitted in the direction of the heat conduction tube 11.

[0041] When the ambient temperature inside the flight tube 1 needs to be lowered, the controller 28 is turned off to stop heating, and the telescopic cylinder 271 is controlled to telescope and drive the insulating outer tube 273 to rotate so that the heat dissipation holes of the two coincide. At this time, multiple heat dissipation holes appear on the circumferential side of the tube wall. At the same time, the external motor is controlled to drive the turntable 22 to rotate in the opposite direction. Under the guiding action of the guide blades 26, the heat on the outer surface of the heat conducting tube 11 is quickly brought out, so that the heat dissipation of various parts of the heat conducting tube 11 is achieved quickly and evenly, avoiding the temperature difference inside the heat conducting tube 11 due to heat dissipation, which affects the flight trajectory of the ions, and improving the relative stability of the ambient temperature at various parts inside the flight tube 1 during heat dissipation.

[0042] In this embodiment, an ion detector is installed in the upper part of the temperature conducting tube 11 to detect ions passing through the flight path.

[0043] In this embodiment, the upper end of the end cap 3 is connected to the interior of the thermal conductive tube 11 and is detachably mounted with an ion trap 5 for collecting and processing the detected ions.

[0044] In this embodiment, a thermal insulation sealing layer is adhered to the outer side of the thermal insulation inner tube 12 , which can form a seal between the thermal insulation outer tube 273 and the tube wall of the thermal insulation inner tube 12 .

[0045] During specific implementation, the ambient temperature inside the flight tube is controlled in real time by a temperature control mechanism so that the ambient temperature inside the tube meets the detection requirements. The ions to be tested are then emitted into the flight tube by an ion emitter and fly along the flight tube. They are then detected by an ion detector and the detected ions are captured and collected by an ion capturer.

[0046] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mass spectrometer flight tube temperature control device, characterized in that: include: A flight tube (1) is vertically mounted on the upper end of a joint (4); an end cap (3) for sealing is fixed to the upper end of the flight tube (1); an arc-shaped guide groove (31) is provided through the outer portion of the upper end of the end cap (3); the flight tube (1) comprises a temperature conducting tube (11) and a temperature insulating inner tube (12); the temperature insulating inner tube (12) is coaxially arranged at intervals on the outer side of the temperature conducting tube (11); the upper ends of the temperature conducting tube (11) and the temperature insulating inner tube (12) are both fixedly connected to the end cap (3); the lower end of the temperature conducting tube (11) is fixedly connected to the joint (4); a temperature regulating mechanism (2) is arranged between the temperature conducting tube (11) and the temperature insulating inner tube (12) for adjusting the internal ambient temperature of the flight tube (1) in real time; The temperature adjustment mechanism (2) comprises: An isolation cover (21) is coaxially fixedly arranged on the outer side of the lower end of the flight tube (1) and is fixedly connected to the joint (4); A rotating disk (22) is rotatably sleeved on the outer side of the temperature conducting tube (11) via a bearing, and a gear ring (24) is sleeved on the outer side of the rotating disk (22); a driving gear (25) which is rotatably disposed on one side of the ring gear (24) and meshes with the ring gear (24) for transmission; and The heating resistor plate (23) is an arc-shaped plate structure. The heating resistor plate (23) is vertically arranged on the upper end of the rotating disk (22), and a plurality of heating resistor plates (23) are evenly spaced. The heating resistor plates (23) are driven by a controller (28).

2. A mass spectrometer flight tube temperature control device according to claim 1, characterized in that: A plurality of arc-shaped guide vanes (26) are evenly and vertically arranged at the upper end of the rotating disk (22) and located between the heating resistor plates (23), and the guide vanes (26) are made of heat-insulating material.

3. A mass spectrometer flight tube temperature control device according to claim 1, characterized in that: The outer peripheral side of the thermal conductive tube (11) is evenly and spirally provided with a plurality of heat-conducting strips (13); the peripheral side of the thermal insulation inner tube (12) is provided with a plurality of strip-shaped heat dissipation holes along its axial direction; and the outer side of the thermal insulation inner tube (12) is also rotatably provided with a heat dissipation adjustment mechanism (27).

4. A mass spectrometer flight tube temperature control device according to claim 3, characterized in that: The heat dissipation adjustment mechanism (27) comprises: a telescopic cylinder (271), one end of which is hinged to the upper end of the end cover (3); the other end of the telescopic cylinder (271) is rotatably mounted with a positioning shaft (272); the positioning shaft (272) passes downward through the arc-shaped guide groove (31) and is rotatably arranged on the upper end of the thermal insulation outer tube (273); the thermal insulation outer tube (273) is sealed and rotatably matched with the thermal insulation inner tube (12); and a second heat dissipation hole (274) of the same specification as the heat dissipation hole is arranged on the thermal insulation outer tube (273).

5. A mass spectrometer flight tube temperature control device according to claim 4, characterized in that: The tube wall width between each adjacent heat dissipation hole (274) is greater than the spacing between the heat dissipation holes (1).

6. A mass spectrometer flight tube temperature control device according to claim 3, characterized in that: An ion detector is installed in the upper part of the temperature conducting tube (11) for detecting ions passing through the flight path.

7. A mass spectrometer flight tube temperature control device according to claim 4, characterized in that: The upper end of the end cover (3) is connected to the interior of the thermal conductive tube (11) and is detachably mounted with an ion trap (5).

8. A mass spectrometer flight tube temperature control device according to claim 4, characterized in that: A thermal insulation sealing layer is bonded to the outside of the thermal insulation inner tube (12), which can form a seal between the thermal insulation outer tube (273) and the tube wall of the thermal insulation inner tube (12).

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