A cone-changing device for an inductively coupled plasma mass spectrometer

Abstract

The present invention discloses a cone changing device for an inductively coupled plasma mass spectrometer, comprising: a torch chamber frame body with a hollow interior to form a torch chamber cavity having an open end at the side; an intercept cone seat disposed in the torch chamber cavity, and a sampling cone seat disposed on the intercept cone seat; wherein, an intercept cone is detachably mounted on the intercept cone seat, and a sampling cone is detachably mounted on the sampling cone seat; the intercept cone seat and the sampling cone seat can selectively enter and exit the torch chamber cavity, and at the same time, the intercept cone and the sampling cone can selectively enter and exit the torch chamber cavity. According to the present invention, it realizes the detachment of the sampling cone and the intercept cone from the interior of the torch chamber cavity, making the cone changing operation more convenient and fast; at the same time, after replacement, it can ensure that there is no relative offset in the central position of the sampling cone and the intercept cone with respect to the torch tube, the system has high stability, and does not affect the sensitivity of the instrument.

Description

Technical Field

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

[0002] An inductively coupled plasma mass spectrometer generally consists of several main parts such as an inductively coupled plasma ion source system, an interface system, an ion optical system, and an electronic control system. Among them, the interface system mainly introduces the sample ions generated by the inductively coupled plasma source into the vacuum system through an intercept cone and a sampling cone. Since the inductively coupled plasma mass spectrometer is mainly used for elemental analysis, it works in a high-temperature, high-salt, and high-acid environment. After working for a period of time, the intercept cone and the sampling cone are prone to contamination, corrosion, and ablation, directly affecting the sensitivity of the mass spectrometer. Therefore, after the inductively coupled plasma mass spectrometer is used for a period of time, the intercept cone and the sampling cone need to be removed for cleaning and replacement.

[0003] Currently, the method for cleaning and replacing the intercept cone and the sampling cone is to first move the inductively coupled plasma source a certain distance along the axial direction of the intercept cone and the sampling cone to move the torch tube away from the sampling cone. After replacing the sampling cone and the intercept cone on the instrument with a special tool, the inductively coupled plasma source is then reset. However, this cone-changing method is relatively complex and time-consuming. Moreover, due to the complex structure and large weight of the plasma source body, the positions of the torch tube inside the source and the sampling cone and the intercept cone cannot be kept consistent with those before cone-changing after resetting, affecting the sampling efficiency and reducing the sensitivity of the instrument.

[0004] In view of this, it is necessary to develop a cone-changing device for an inductively coupled plasma mass spectrometer to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies in the prior art, the main object of the present invention is to provide a cone-changing device for an inductively coupled plasma mass spectrometer. By setting the intercept cone seat and the sampling cone seat to selectively enter and exit the torch chamber cavity, the intercept cone and the sampling cone can selectively enter and exit the torch chamber cavity, so as to facilitate the disassembly and replacement of the intercept cone and the sampling cone, realizing the separation of the sampling cone and the intercept cone from the inside of the torch chamber cavity, making the cone-changing operation more convenient and fast. At the same time, after replacement, it can ensure that the sampling cone and the intercept cone do not have a relative offset with the central position of the torch tube, with high system stability and no impact on the instrument sensitivity.

[0006] To achieve these and other advantages of the present invention, there is provided a cone-changing device for an inductively coupled plasma mass spectrometer, including: a torch chamber frame body, which is hollow inside to form a torch chamber cavity with an open end on the side;

[0007] an intercept cone seat, which is arranged in the torch chamber cavity, and

[0008] A sampling cone base, which is arranged on the intercepting cone base;

[0009] Wherein, an intercepting cone is detachably installed on the intercepting cone base, and a sampling cone is detachably installed on the sampling cone base;

[0010] The intercepting cone base and the sampling cone base can selectively enter and exit the torch chamber cavity, and at the same time, the intercepting cone and the sampling cone can selectively enter and exit the torch chamber cavity.

[0011] Preferably, the torch chamber frame includes: a sliding wall, and the intercepting cone base is slidably installed on the sliding wall;

[0012] Wherein, a sliding groove is formed on the surface of the sliding wall, a sliding part is arranged on the surface of the intercepting cone base, and the sliding groove is adapted to the sliding part.

[0013] Preferably, the cross-sections of the sliding groove and the sliding part are both in a dovetail shape.

[0014] Preferably, a limiting member is arranged on the intercepting cone base.

[0015] Preferably, it further includes: a cooling member, which is fixedly installed on the intercepting cone base,

[0016] A limiting groove is formed in the central area of the cooling member, and the sampling cone base is installed in the limiting groove.

[0017] Preferably, cooling grooves are formed in the circumferential area of the sampling cone base, and a cooling cavity is defined between the inner wall of the cooling groove and the inner wall of the limiting groove.

[0018] Preferably, a water inlet pipeline and a water outlet pipeline are formed inside the cooling member,

[0019] One ends of the water inlet pipeline and the water outlet pipeline are both communicated with the cooling cavity, and the water inlet pipeline and the water outlet pipeline are both communicated with an external cooling device.

[0020] Preferably, it further includes: a cover plate, which is fixedly connected to the intercepting cone base, and the axis of the cover plate forms a certain angle with the axis of the intercepting cone base;

[0021] The cross-sectional area of the cover plate is larger than the cross-sectional area of the opening of the torch chamber cavity.

[0022] Preferably, a holding part is arranged on the cover plate, and the holding part extends away from the surface of the cover plate.

[0023] Preferably, a first placement groove is formed in the central area of the intercepting cone base;

[0024] A second placement groove is provided in the central line area of the sampling cone base.

[0025] One of the above technical solutions has the following advantages or beneficial effects: In this application, by setting the intercepting cone base and the sampling cone base to selectively enter and exit the torch chamber cavity, the intercepting cone and the sampling cone can selectively enter and exit the torch chamber cavity, so as to facilitate the disassembly and replacement of the intercepting cone and the sampling cone, realizing the detachment of the sampling cone and the intercepting cone from the inside of the torch chamber cavity, making the cone replacement operation more convenient and fast; at the same time, after replacement, it can ensure that the sampling cone and the intercepting cone do not have a relative offset with the central position of the torch tube, the system stability is high, and it does not affect the instrument sensitivity.

[0026] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research 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 will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention, where:

[0028] Figure 1 FIG. 15 is a top view of a cone replacement device for an inductively coupled plasma mass spectrometer according to an embodiment of the present invention;

[0029] Figure 2 FIG. 19 is an exploded structural view of a cone replacement device for an inductively coupled plasma mass spectrometer according to an embodiment of the present invention;

[0030] Figure 3 FIG. 23 is a cross-sectional view of a cone replacement device for an inductively coupled plasma mass spectrometer according to an embodiment of the present invention;

[0031] Figure 4 FIG. 27 is a three-dimensional structural view of a cone replacement device for an inductively coupled plasma mass spectrometer with the torch chamber frame and the cover plate hidden according to an embodiment of the present invention;

[0032] Figure 5 FIG. 31 is a cross-sectional view of a cone replacement device for an inductively coupled plasma mass spectrometer with the torch chamber frame and the cover plate hidden according to an embodiment of the present invention.

[0033] Description of the reference numerals:

[0034] 100, cone replacement device

[0035] 110, torch chamber frame; 111, torch chamber cavity; 112, sliding wall; 1121, sliding groove;

[0036] 120. Intercepting cone base; 121. Sliding part; 122. First placement groove;

[0037] 130. Sampling cone base; 131. Cooling groove; 132. Second placement groove;

[0038] 140. Intercepting cone;

[0039] 150. Sampling cone;

[0040] 160. Limiting part;

[0041] 170. Cooling part; 171. Limiting groove; 172. Water inlet pipeline; 173. Water outlet pipeline;

[0042] 180. Cover plate; 181. Holding part. Detailed implementation mode

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] In the drawings, for clarity, the shapes and dimensions may be enlarged, and the same reference numerals will be used throughout the drawings to indicate the same or similar components.

[0045] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meaning understood by those of ordinary skill in the art to which the present invention belongs. The "first", "second" and similar terms used in the description and claims of this patent application of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a", "one" or "the" do not indicate a quantity limitation, but indicate the existence of at least one. The terms such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. The terms such as "upper", "lower", "left" and "right" are only used to indicate the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0046] In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are defined with respect to the configurations shown in the respective drawings. In particular, "height" corresponds to the dimension from the top to the bottom, "width" corresponds to the dimension from the left to the right, and "depth" corresponds to the dimension from the front to the back. They are relative concepts and thus may change accordingly depending on their different positions and usage states. Therefore, these or other orientations should not be construed as restrictive terms.

[0047] Terms related to attachment, connection, etc. (e.g., "connect" and "attach") refer to the relationship in which these structures are directly or indirectly fixed or attached to each other through an intermediate structure, as well as the relationship of movable or rigid attachment, unless otherwise explicitly stated.

[0048] According to an embodiment of the present invention in combination with Figures 1 to 5 As shown, the cone-changing device 100 for an inductively coupled plasma mass spectrometer includes: a torch chamber housing 110, which is hollow inside to form a torch chamber cavity 111 with an open side end;

[0049] An intercept cone seat 120, which is disposed in the torch chamber cavity 111, and

[0050] A sampling cone seat 130, which is disposed on the intercept cone seat 120;

[0051] Wherein, an intercept cone 140 is detachably mounted on the intercept cone seat 120, and a sampling cone 150 is detachably mounted on the sampling cone seat 130;

[0052] The intercept cone seat 120 and the sampling cone seat 130 can selectively enter and exit the torch chamber cavity 111, and at the same time, the intercept cone 140 and the sampling cone 150 can selectively enter and exit the torch chamber cavity 111.

[0053] It can be understood that in the present application, by setting that the intercept cone seat 120 and the sampling cone seat 130 can selectively enter and exit the torch chamber cavity 111, the intercept cone 140 and the sampling cone 150 can selectively enter and exit the torch chamber cavity 111, so as to facilitate the disassembly and replacement of the intercept cone 140 and the sampling cone 150, realizing the detachment of the sampling cone and the intercept cone from the inside of the torch chamber cavity, making the cone-changing operation more convenient and fast; at the same time, after replacement, it can ensure that the sampling cone and the intercept cone do not shift relative to the central position of the torch tube, the system has high stability, and does not affect the sensitivity of the instrument.

[0054] Furthermore, the torch chamber housing 110 includes: a sliding wall 112, and the intercept cone seat 120 is slidably mounted on the sliding wall 112;

[0055] Among them, a chute 1121 is provided on the surface of the sliding wall 112, and a sliding portion 121 is provided on the surface of the intercepting cone base 120, and the chute 1121 is adapted to the sliding portion 121.

[0056] Furthermore, the cross-sections of both the chute 1121 and the sliding portion 121 are in the shape of a dovetail.

[0057] It can be understood that in this application, with the cooperation of the chute 1121 and the sliding portion 121, the intercepting cone base 120 and the sampling cone base 130 can selectively enter and exit the torch chamber 111, so that the intercepting cone 140 and the sampling cone 150 can selectively enter and exit the torch chamber 111.

[0058] Furthermore, a limiting member 160 is provided on the intercepting cone base 120. Through the action of the limiting member 160, the intercepting cone base 120 and the sampling cone base 130 are prevented from sliding excessively.

[0059] Furthermore, the cone changing device 100 further includes: a cooling member 170, which is fixedly installed on the intercepting cone base 120,

[0060] A limiting groove 171 is provided in the central region of the cooling member 170, and the sampling cone base 130 is installed in the limiting groove 171.

[0061] Furthermore, a cooling groove 131 is provided in the circumferential region of the sampling cone base 130, and a cooling cavity is defined between the inner wall of the cooling groove 131 and the inner wall of the limiting groove 171.

[0062] Furthermore, a water inlet pipeline 172 and a water outlet pipeline 173 are provided inside the cooling member 170,

[0063] One ends of the water inlet pipeline 172 and the water outlet pipeline 173 are both communicated with the cooling cavity, and the water inlet pipeline 172 and the water outlet pipeline 173 are both communicated with an external cooling device.

[0064] Furthermore, the cone changing device 100 further includes: a cover plate 180, the cover plate 180 is fixedly connected to the intercepting cone base 120, and the axis of the cover plate 180 forms a certain angle with the axis of the intercepting cone base 120;

[0065] The cross-sectional area of the cover plate 180 is larger than the cross-sectional area of the opening of the torch chamber 111.

[0066] Furthermore, a holding portion 181 is arranged on the cover plate 180, and the holding portion 181 extends away from the surface of the cover plate 180.

[0067] Further, a first placement groove 122 is provided in the central region of the intercepting cone base 120; a second placement groove 132 is provided in the central line region of the sampling cone base 130.

[0068] Understandably, the intercepting cone 140 is placed in the first placement groove 122, and the sampling cone 150 is placed in the second placement groove 132 to limit and fix the intercepting cone 140 and the sampling cone 150.

[0069] The number of devices and the processing scale described here are used to simplify the description of the present invention. Applications, modifications, and variations of the present invention will be apparent to those skilled in the art.

[0070] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and 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 achieved. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A cone-changing device for an inductively coupled plasma mass spectrometer, characterized in that, it includes: a torch chamber housing (110) with a hollow interior to form a torch chamber cavity (111) having an open end on the side; an extraction cone seat (120) disposed within the torch chamber cavity (111), and a sampling cone seat (130) disposed on the extraction cone seat (120); wherein, an extraction cone (140) is detachably mounted on the extraction cone seat (120), and a sampling cone (150) is detachably mounted on the sampling cone seat (130); the extraction cone seat (120) and the sampling cone seat (130) can selectively enter and exit the torch chamber cavity (111), and at the same time, the extraction cone (140) and the sampling cone (150) can selectively enter and exit the torch chamber cavity (111); the torch chamber housing (110) includes: a sliding wall (112), and the extraction cone seat (120) is slidably mounted on the sliding wall (112); wherein, a chute (1121) is formed on the surface of the sliding wall (112), a sliding portion (121) is provided on the surface of the extraction cone seat (120), and the chute (1121) is adapted to the sliding portion (121); the cross-sections of the chute (1121) and the sliding portion (121) are both in the shape of a dovetail; a first placement groove (122) is formed in the central region of the extraction cone seat (120); a second placement groove (132) is formed in the median region of the sampling cone seat (130).

2. The cone-changing device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that, a limiting member (160) is provided on the extraction cone seat (120).

3. The cone-changing device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that, it further includes: a cooling member (170) fixedly mounted on the extraction cone seat (120), a limiting groove (171) is formed in the central region of the cooling member (170), and the sampling cone seat (130) is mounted in the limiting groove (171).

4. The cone-changing device for an inductively coupled plasma mass spectrometer according to claim 3, characterized in that, a cooling groove (131) is formed in the circumferential region of the sampling cone seat (130), and a cooling cavity is defined between the inner wall of the cooling groove (131) and the inner wall of the limiting groove (171).

5. The cone-changing device for an inductively coupled plasma mass spectrometer according to claim 4, characterized in that, a water inlet pipeline (172) and a water outlet pipeline (173) are formed inside the cooling member (170), one ends of the water inlet pipeline (172) and the water outlet pipeline (173) are both communicated with the cooling cavity, and the water inlet pipeline (172) and the water outlet pipeline (173) are both communicated with an external cooling device.

6. The cone-changing device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that, it further includes: A cover plate (180), the cover plate (180) is fixedly connected to the intercepting cone seat (120), and the axis of the cover plate (180) forms a certain angle with the axis of the intercepting cone seat (120); The cross-sectional area of the cover plate (180) is larger than the cross-sectional area of the opening of the torch chamber (111).

7. The cone-changing device for an inductively coupled plasma mass spectrometer according to claim 6, characterized in that A holding part (181) is arranged on the cover plate (180), and the holding part (181) extends away from the surface of the cover plate (180).

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