A cone changing device for inductively coupled plasma mass spectrometer

Abstract

The present invention belongs to the technical field of mass spectrometers and discloses a cone changing device for an inductively coupled plasma mass spectrometer. The cone changing device for an inductively coupled plasma mass spectrometer comprises a positioning shell, the outer side wall of the positioning shell being fixedly connected to a handheld shell, and the handheld shell being in communication with the positioning shell. The positioning shell is provided with a disassembly and assembly mechanism for disassembling and assembling a sampling cone and a skimmer cone, and the handheld shell is provided with a pick-and-place mechanism for taking, placing, and replacing the sampling cone and the skimmer cone. The cone changing device for an inductively coupled plasma mass spectrometer adopts a miniaturized design and can flexibly adapt to the narrow space within the mass spectrometer, making it easy to disassemble the sampling cone and the skimmer cone without removing other internal components.

Description

Technical Field

[0001] The present invention relates to the technical field of mass spectrometers, and in particular to a cone changing device for an inductively coupled plasma mass spectrometer. Background Art

[0002] Inductively coupled plasma mass spectrometry (ICP-MS) is an inorganic element and isotope analysis and testing technology. The ICP-MS instrument based on this technology is a multi-element analysis device widely used in many industrial fields. When the ICP-MS is operating, the sample is passed through a nebulizer to generate an aerosol. A strong radio frequency field causes collisions between atoms, generating a high-energy plasma. The plasma then enters the vacuum chamber of the mass spectrometer through an interface system.

[0003] The sampling cone and the skimmer cone are important components of the interface system. There are two completely different environments at both ends of it. One side is a normal pressure, high temperature plasma torch, and the other side is a vacuum, normal temperature, clean environment. Due to the complexity of the test samples, the working environment of the cone is also relatively harsh. In order to avoid detection errors due to contamination of the sampling cone and the skimmer cone, both need to be cleaned or replaced regularly. The traditional disassembly method is relatively complicated and requires the removal of adjacent accessories in the equipment to facilitate cone replacement. A lot of time is also required for subsequent calibration, which requires a lot of time for maintenance. Therefore, we proposed a cone replacement device. Summary of the Invention

[0004] The object of the present invention is to provide a cone changing device for an inductively coupled plasma mass spectrometer. Compared with the prior art, the cone changing device for an inductively coupled plasma mass spectrometer does not require shifting of components inside the device, can achieve rapid positioning, rapid disassembly, and rapid replacement, and solves the problems raised in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a cone replacement device for an inductively coupled plasma mass spectrometer, comprising a positioning shell, a handheld shell fixedly connected to the outer wall of the positioning shell, and the handheld shell is in communication with the positioning shell, a disassembly and assembly mechanism is provided in the positioning shell for disassembling and assembling a sampling cone and a skimmer cone, and a pick-and-place mechanism is provided in the handheld shell for removing, placing, and replacing the sampling cone and the skimmer cone;

[0006] A positioning ring is fixedly connected to the outer wall of the positioning shell near its opening. A plurality of mounting grooves are opened on the side of the positioning ring away from the positioning shell. Electromagnets are installed in the mounting grooves. A soft pad is bonded to the side of the positioning ring away from the positioning shell to cover the mounting grooves.

[0007] Based on the above technical solution, this application adopts a miniaturized design, which can flexibly adapt to the narrow space inside the mass spectrometer, facilitate the disassembly of the sampling cone and the skimmer cone, and does not require the removal of other internal components. At the same time, the design of the electromagnet is used to facilitate the positioning of the device, avoiding displacement during disassembly and installation, and causing damage to the threaded structure of the vertebral body on the surface. The soft pad can protect the components and avoid scratches.

[0008] Preferably, the disassembly and assembly mechanism includes a driving motor, a square shaft, an internally threaded sleeve, an externally threaded tube, a rotating plate, a suction cup, a micro vacuum pump and a connecting pipe. The driving motor is fixedly mounted on the middle part of the inner bottom wall of the positioning shell, the square shaft is fixedly mounted on the output end of the driving motor, the driving motor is also fixedly connected to the internally threaded sleeve, and the square shaft is in the internally threaded sleeve, the square shaft is inserted in the externally threaded tube, and the externally threaded tube is threadedly connected to the internally threaded sleeve, the middle part of the rotating plate is fixedly connected to the end of the externally threaded tube away from the driving motor, and a number of suction cups are provided on the end of the rotating plate away from the externally threaded tube, the micro vacuum pump is fixedly mounted on the side of the rotating plate close to the driving motor, and the air inlet end of the micro vacuum pump is connected to the perforation in the middle of the suction cup through a connecting pipe to control the adsorption of the suction cup.

[0009] Based on the above technical solution, the rotation of the driving motor is used to drive the rotating plate to rotate and perform axial displacement, thereby realizing rapid disassembly and assembly of the vertebral body.

[0010] Preferably, a central hole is provided in the middle of the rotating plate at a position corresponding to the square shaft, and a laser lamp is installed in a groove provided at one end of the square shaft away from the driving motor for positioning the housing.

[0011] Based on the above technical solution, the laser emitted by the laser lamp can be used to locate the axis of the positioning shell, so that the light emitted by the laser lamp passes through the center hole of the sampling cone or the intercepting cone, and then the electromagnet is used to make the positioning shell adsorbed on the cone seat to complete the positioning, so that the torque output by the rotating plate can be evenly applied to the sampling cone or the intercepting cone, avoiding damage to the structure due to uneven torque.

[0012] Preferably, the picking and placing mechanism includes a clamping ring, a limiting ring, a connecting rod, a movable rod, a strip notch, a receiving groove and a clamping rubber strip. The clamping ring is in the positioning shell, and the diameter of the clamping ring is the same as the inner diameter of the positioning shell. The inner wall of the clamping ring is fixedly connected to the limiting ring on the side close to the driving motor. The outer wall of the clamping ring is fixedly connected to one end of the connecting rod, and the other end of the connecting rod passes through the hand-held shell to its outside. A movable rod is hinged to the middle of the connecting rod, and one end of the movable rod passes through the hand-held shell to its outside. A strip notch is provided on the clamping ring at a position corresponding to the other end of the movable rod, and the strip notch is connected to the receiving groove on the inner wall of the clamping ring. The clamping rubber strip is in the receiving groove, and the outer side of the clamping rubber strip is fixedly connected to the other end of the movable rod.

[0013] Based on the above technical solution, the design of the pick-and-place mechanism is utilized to facilitate taking out the vertebral body from the positioning shell or placing the vertebral body into the positioning shell, and the operation is convenient.

[0014] Preferably, the positioning shell and the rotating plate are both made of acrylic, and the light emission direction of the laser lamp coincides with the axis of the external threaded tube. The use of acrylic makes the device have excellent light transmittance, realizes visual adjustment when using laser positioning, and is easy to operate.

[0015] Preferably, the width of the inner cavity of the handheld shell is the same as the inner diameter of the positioning shell, and the number of the suction cups is six and they are arranged in a ring with the central hole as the center.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are:

[0017] 1. The cone replacement device for an inductively coupled plasma mass spectrometer adopts a miniaturized design, which can flexibly adapt to the narrow space inside the mass spectrometer, facilitate the disassembly of the sampling cone and the skimmer cone, and does not require the removal of other internal components.

[0018] 2. The cone changing device for inductively coupled plasma mass spectrometer uses the rotation of the driving motor to drive the rotating plate to rotate and perform axial displacement, which can realize the rapid disassembly and assembly of the vertebral body. The design of the pick-and-place mechanism makes it easy to remove the vertebral body from the positioning shell or place the vertebral body into the positioning shell, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a front view of the present invention;

[0021] Figure 3 For the present invention Figure 2 Middle AA cross-section;

[0022] Figure 4 It is a left side view of the present invention;

[0023] Figure 5 For the present invention Figure 4 Middle BB cross-section;

[0024] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle.

[0025] In the figure: 1 positioning shell, 2 handheld shell, 3 disassembly and assembly mechanism, 31 driving motor, 32 square shaft, 33 internal threaded sleeve, 34 external threaded tube, 35 rotating plate, 36 suction cup, 37 micro vacuum pump, 38 connecting pipe, 4 pick-and-place mechanism, 41 clamping ring, 42 limit ring, 43 connecting rod, 44 movable rod, 45 strip notch, 46 storage groove, 47 clamping rubber strip, 5 positioning ring, 6 mounting groove, 7 electromagnet, 8 soft pad, 9 middle hole, 10 laser light. DETAILED DESCRIPTION

[0026] See also Figure 1-6 The present invention provides a technical solution: a cone replacement device for an inductively coupled plasma mass spectrometer, comprising a positioning shell 1, a hand-held shell 2 fixedly connected to the outer wall of the positioning shell 1, and the hand-held shell 2 is in communication with the positioning shell 1, a disassembly and assembly mechanism 3 is provided in the positioning shell 1 for disassembling and assembling the sampling cone and the skimmer cone, and a pick-and-place mechanism 4 is provided in the hand-held shell 2 for taking, placing and replacing the sampling cone and the skimmer cone;

[0027] A positioning ring 5 is fixedly connected to the outer wall of the positioning shell 1 near its opening. A plurality of mounting grooves 6 are opened on the side of the positioning ring 5 away from the positioning shell 1. Electromagnets 7 are installed in the mounting grooves 6. A soft pad 8 is bonded to the side of the positioning ring 5 away from the positioning shell 1 to cover the mounting grooves 6.

[0028] Based on the above technical solution, the present application adopts a miniaturized design, which can flexibly adapt to the narrow space inside the mass spectrometer, facilitate the disassembly of the sampling cone and the intercepting cone, and does not require the removal of other internal components. At the same time, the design of the electromagnet 7 is used to facilitate the positioning of the device, avoiding displacement during disassembly and installation, and causing damage to the threaded structure of the vertebral body on the surface. The soft pad 8 can protect the components and avoid scratches.

[0029] The disassembly and assembly mechanism 3 includes a drive motor 31, a square shaft 32, an internally threaded sleeve 33, an externally threaded tube 34, a rotating plate 35, a suction cup 36, a micro vacuum pump 37 and a connecting pipe 38. The drive motor 31 is fixedly mounted in the middle of the inner bottom wall of the positioning shell 1, the square shaft 32 is fixedly mounted on the output end of the drive motor 31, the drive motor 31 is also fixedly connected to the internally threaded sleeve 33, and the square shaft 32 is in the internally threaded sleeve 33. The square shaft 32 is inserted in the externally threaded tube 34, and the externally threaded tube 34 is threadedly connected to the internally threaded sleeve 33. The middle part of the rotating plate 35 is fixedly connected to the end of the externally threaded tube 34 away from the drive motor 31. A number of suction cups 36 are provided on the end of the rotating plate 35 away from the externally threaded tube 34. The micro vacuum pump 37 is fixedly mounted on a side of the rotating plate 35 close to the drive motor 31. The air inlet end of the micro vacuum pump 37 is connected to the perforation in the middle of the suction cup 36 through the connecting pipe 38 to control the adsorption of the suction cup 36.

[0030] Based on the above technical solution, the rotation of the driving motor 31 drives the rotating plate 35 to rotate and perform axial displacement, thereby realizing rapid disassembly and assembly of the vertebral body.

[0031] A central hole 9 is provided in the middle of the rotating plate 35 at a position corresponding to the square shaft 32 , and a laser lamp 10 is installed in a groove at one end of the square shaft 32 away from the driving motor 31 for positioning the housing 1 .

[0032] Based on the above technical solution, the laser emitted by the laser lamp 10 can be used to locate the axis of the positioning shell 1, so that the light emitted by the laser lamp 10 passes through the center hole of the sampling cone or the intercepting cone, and then the electromagnet 7 is used to make the positioning shell 1 adsorbed on the cone seat to complete the positioning, so that the torque output by the rotating plate 35 can be evenly applied to the sampling cone or the intercepting cone, avoiding damage to the structure due to uneven torque.

[0033] The picking and placing mechanism 4 includes a clamping ring 41, a limiting ring 42, a connecting rod 43, a movable rod 44, a strip notch 45, a receiving groove 46 and a clamping rubber strip 47. The clamping ring 41 is located in the positioning shell 1, and the diameter of the clamping ring 41 is the same as the inner diameter of the positioning shell 1. The inner wall of the clamping ring 41 is fixedly connected to the limiting ring 42 on one side close to the driving motor 31. The outer wall of the clamping ring 41 is fixedly connected to one end of the connecting rod 43, and the other end of the connecting rod 43 passes through the hand-held shell 2 to its outside. A movable rod 44 is hinged to the middle of the connecting rod 43, and one end of the movable rod 44 passes through the hand-held shell 2 to its outside. A strip notch 45 is provided on the clamping ring 41 at a position corresponding to the other end of the movable rod 44, and the strip notch 45 is connected to the receiving groove 46 on the inner wall of the clamping ring 41. The clamping rubber strip 47 is in the receiving groove 46, and the outer side of the clamping rubber strip 47 is fixedly connected to the other end of the movable rod 44.

[0034] Based on the above technical solution, the design of the pick-and-place mechanism 4 facilitates the removal of the vertebral body from the positioning shell 1 or the placement of the vertebral body into the positioning shell 1 , and the operation is convenient.

[0035] The positioning shell 1 and the rotating plate 35 are both made of acrylic. The light output direction of the laser lamp 10 coincides with the axis of the external threaded tube 34. The use of acrylic makes this device have excellent light transmittance, realizes visual adjustment when using laser positioning, and is easy to operate.

[0036] The width of the inner cavity of the handheld shell 2 is the same as the inner diameter of the positioning shell 1. The number of suction cups 36 is six and they are arranged in a ring with the central hole 9 as the center.

[0037] When the cone-changing device for inductively coupled plasma mass spectrometer is in operation, the mass spectrometer housing is removed and the device is placed between the cone and the lens. The laser emitted by the laser lamp 10 is used to locate the axis of the positioning shell 1, so that the light emitted by the laser lamp 10 passes through the central hole of the sampling cone. Then, the electromagnet 7 is used to adsorb the positioning shell 1 on the cone seat to complete the positioning. The motor 31 is driven to rotate so that the rotating plate 35 is close to the sampling cone. At the same time, the micro vacuum pump 37 is started so that the suction cup 36 is adsorbed on the outside of the sampling cone. Then the motor 31 is driven to rotate. Unscrew the sampling cone to separate it from the cone seat and bring the sampling cone into the positioning shell 1 to the inside of the clamping ring 41, press the movable rod 44 to clamp the sampling cone with the clamping rubber strip 47, stop the micro vacuum pump 37, and detach the suction cup 36. Then take out the sampling cone from the handheld shell 2. The disassembly of the intercepting cone is the same as above. After the vertebral body is cleaned, the clamping ring 41 will send the replaced vertebral body into the positioning shell 1 and use the rotating plate 35 to rotate and install it. The positioning shell 1 will not be disassembled during the disassembly and assembly process to ensure inconvenience at the work station and avoid structural damage during the installation process.

[0038] Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cone changing device for an inductively coupled plasma mass spectrometer, characterized in that: The invention comprises a positioning shell (1), the outer side wall of the positioning shell (1) is fixedly connected to a hand-held shell (2), and the hand-held shell (2) is communicated with the positioning shell (1), a disassembly mechanism (3) is provided in the positioning shell (1) for disassembling and assembling a sampling cone and a skimmer cone, and a pick-up and placement mechanism (4) is provided in the hand-held shell (2) for taking, placing and replacing the sampling cone and the skimmer cone; A positioning ring (5) is fixedly connected to the outer wall of the positioning shell (1) near its opening, and a plurality of mounting grooves (6) are provided on the side of the positioning ring (5) away from the positioning shell (1), and an electromagnet (7) is installed in the mounting groove (6). A soft pad (8) is bonded to the side of the positioning ring (5) away from the positioning shell (1) to cover the mounting groove (6); The disassembly and assembly mechanism (3) comprises a driving motor (31), a square shaft (32), an internal threaded sleeve (33), an external threaded tube (34), a rotating plate (35), a suction cup (36), a micro vacuum pump (37) and a connecting pipe (38), wherein the driving motor (31) is fixedly mounted on the middle portion of the inner bottom wall of the positioning shell (1), the square shaft (32) is fixedly mounted on the output end of the driving motor (31), the driving motor (31) is also fixedly connected to the internal threaded sleeve (33), and the square shaft (32) is in the internal threaded sleeve (33), and the square shaft (32) is plugged into the external threaded sleeve (33). The threaded tube (34) is threadedly connected to the internal threaded sleeve (33), the middle part of the rotating plate (35) is fixedly connected to the end of the external threaded tube (34) away from the driving motor (31), and the end of the rotating plate (35) away from the external threaded tube (34) is provided with a plurality of suction cups (36), and the micro vacuum pump (37) is fixedly installed on the side of the rotating plate (35) close to the driving motor (31), and the air inlet end of the micro vacuum pump (37) is connected to the through hole in the middle of the suction cup (36) through the connecting pipe (38) to control the adsorption of the suction cup (36).

2. The cone changing device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: A central hole (9) is provided in the middle of the rotating plate (35) at a position corresponding to the square shaft (32), and a laser lamp (10) is installed in a groove provided at one end of the square shaft (32) away from the driving motor (31) for positioning the housing (1).

3. The cone changing device for an inductively coupled plasma mass spectrometer according to claim 2, characterized in that: The pick-and-place mechanism (4) comprises a clamping ring (41), a limiting ring (42), a connecting rod (43), a movable rod (44), a strip-shaped notch (45), a receiving groove (46) and a clamping rubber strip (47). The clamping ring (41) is located in the positioning shell (1), and the diameter of the clamping ring (41) is the same as the inner diameter of the positioning shell (1). The inner wall of the clamping ring (41) is fixedly connected to the limiting ring (42) on one side close to the driving motor (31). The outer wall of the clamping ring (41) is fixedly connected to one end of the connecting rod (43). The connecting rod The other end of (43) passes through the hand-held shell (2) to the outside thereof, and a movable rod (44) is hingedly connected to the middle of the connecting rod (43). One end of the movable rod (44) passes through the hand-held shell (2) to the outside thereof. A strip-shaped notch (45) is provided on the clamping ring (41) at a position corresponding to the other end of the movable rod (44), and the strip-shaped notch (45) is communicated with the receiving groove (46) on the inner wall of the clamping ring (41). The clamping rubber strip (47) is located in the receiving groove (46), and the outer side of the clamping rubber strip (47) is fixedly connected to the other end of the movable rod (44).

4. The cone changing device for an inductively coupled plasma mass spectrometer according to claim 3, characterized in that: The positioning shell (1) and the rotating plate (35) are both made of acrylic, and the light emission direction of the laser lamp (10) coincides with the axis of the external threaded tube (34).

5. The cone changing device for an inductively coupled plasma mass spectrometer according to claim 4, characterized in that: The width of the inner cavity of the handheld shell (2) is the same as the inner diameter of the positioning shell (1), and the number of the suction cups (36) is six and they are arranged in a ring shape with the central hole (9) as the center.

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