阅读说明：本技术 一种x射线荧光光谱仪x光管散热机构 (X-ray tube heat dissipation mechanism of X-ray fluorescence spectrometer ) 是由 陈菲 于 2019-11-25 设计创作，主要内容包括：本发明涉及金属检测设备技术领域,且公开了一种X射线荧光光谱仪X光管散热机构,包括设于光谱仪机头本体内的X光管,所述X光管的外部套设散热罩,所述散热罩为环形中空,所述散热罩的环形空腔内填装有冷却液。本发明通过在X光管的周侧设硅油与水混合层的散热罩,由于硅油较水的比热容小,故而,同时间内,上层硅油的升温更快,从而,使得X光管的上下段产生由上及下递减的温度场,X射线在经过上段高温段时,由于其反射强度低,X射线的出射强度可大部分为直射出X光管,从而,使得其下方的样品能够受到按照X光管的投射方向设定的X射线照射,进而样品受X射线轰击产生的X射线荧光能够大部分依角度设定投射到探测器处。(The invention relates to the technical field of metal detection equipment, and discloses an X-ray tube heat dissipation mechanism of an X-ray fluorescence spectrometer, which comprises an X-ray tube arranged in a spectrometer head body, wherein a heat dissipation cover is sleeved outside the X-ray tube, the heat dissipation cover is annular and hollow, and a cooling liquid is filled in an annular cavity of the heat dissipation cover. The heat dissipation cover of the silicon oil and water mixing layer is arranged on the periphery of the X-ray tube, and the silicon oil has smaller specific heat capacity than water, so that the temperature of the upper layer of silicon oil is increased more quickly in the same time, the upper section and the lower section of the X-ray tube generate temperature fields which are decreased from top to bottom, when X-rays pass through the upper section high-temperature section, the emergent intensity of the X-rays can be mostly directly emitted out of the X-ray tube due to low reflection intensity, and therefore, a sample below the X-ray tube can be irradiated by the X-rays set according to the projection direction of the X-ray tube, and then the X-ray fluorescence generated by the sample bombarded by the X-rays can be mostly projected to a detector according to the.)

1. The utility model provides an X ray fluorescence spectrometer X light pipe heat dissipation mechanism, includes spectrometer aircraft nose body (1), locates X light pipe (2) and detector (3) in spectrometer aircraft nose body (1), its characterized in that: the X-ray tube is characterized in that a heat dissipation cover (4) is sleeved outside the X-ray tube (2), the heat dissipation cover (4) is annular hollow, the outer wall of one side of the heat dissipation cover (4) is embedded into the inner wall of the spectrometer head body (1) and is in contact with the outside, the inner annular wall of the heat dissipation cover (4) is sleeved outside the X-ray tube (2), cooling liquid is filled in an annular cavity of the heat dissipation cover (4), the cooling liquid is an oil-water mixture which is layered up and down when standing, a turbulence ring (5) is connected inside the annular cavity of the heat dissipation cover (4) in a sliding mode, a through hole is formed inside the turbulence ring (5), a connecting pipe (6) is fixedly connected to the lower end of the turbulence ring (5), the connecting pipe (6) is arranged into two and is distributed at the bottom end of the turbulence ring (5) in a bilateral symmetry mode, the bottom end of the connecting pipe (6) penetrates through the inside of the heat dissipation cover (4), connecting pipe (6) and holding ring (7) are inside cavity, and connecting pipe (6) and holding ring (7) all with the annular cavity intercommunication in heat dissipation cover (4) the outside activity of spectrum appearance aircraft nose body (1) has cup jointed shield cover (8), shield cover (8) are the hollow lead glass body of annular, the annular cavity inner chamber of shield cover (8) passes through the inner chamber intercommunication of connecting pipe and holding ring (7).

2. The heat dissipation mechanism for the X-ray tube of the X-ray fluorescence spectrometer of claim 1, wherein: the oil-water distribution ratio in the heat dissipation cover (4) is 2: 1.

3. The heat dissipation mechanism for the X-ray tube of the X-ray fluorescence spectrometer of claim 1, wherein: the inner diameter of the through hole of the turbulent flow ring (5) is gradually reduced from top to bottom.

4. The heat dissipation mechanism for the X-ray tube of the X-ray fluorescence spectrometer of claim 1, wherein: the area of the inner ring of the positioning ring (7) is the same as that of the inner ring at the bottom end of the X-ray tube (2), and the positioning ring (7) and the X-ray tube (2) are located on the same central axis.

Technical Field

The invention relates to the technical field of metal detection equipment, in particular to an X-ray tube heat dissipation mechanism of an X-ray fluorescence spectrometer.

Background

For heavy metal detection in soil, a commonly used device, namely an X-ray fluorescence spectrometer, mainly comprises an X-ray tube, a detector, a CPU and a memory, wherein the X-ray tube is used for generating primary X-rays.

The inner layer electrons of target atoms are bombarded by high-speed electrons in the X-ray tube to be in a high-excitation state, the outer layer electrons jump to an inner layer orbit which is lack of electrons, energy is released in the process of the process along with the electromagnetic wave, the wavelength of the energy is small and invisible to naked eyes, the energy is called X-ray, the X-ray is primary X-ray, if the primary X-ray is used as an excitation source to bombard the inner layer electrons of other atoms, the X-ray can also be generated and called secondary X-ray or X-ray fluorescence, the wavelength of the X-ray fluorescence is characterized by the atomic number of an excited substance (substance to be detected), therefore, the metal element type in the substance to be detected can be qualitatively analyzed, the intensity of the characteristic X-ray fluorescence emitted by the element excitation depends on the content of the element, and the metal element content of the substance to be detected can be quantitatively analyzed.

The X-ray tube generates a large amount of heat because the X-ray in the X-ray tube is generated by high-speed electron bombardment of target atoms, the reflection performance of the X-ray tube is influenced at a continuously high temperature, so that the X-ray emergent intensity is influenced.

Disclosure of Invention

Aiming at the defects of the prior X-ray tube in the use process, the invention provides the X-ray tube heat dissipation mechanism of the X-ray fluorescence spectrometer, which has the advantages of heat dissipation and stable X-ray beam current and solves the problems in the prior art.

The invention provides the following technical scheme: an X-ray tube heat dissipation mechanism of an X-ray fluorescence spectrometer comprises a spectrometer head body, an X-ray tube and a detector, wherein the X-ray tube and the detector are arranged in the spectrometer head body, a heat dissipation cover is sleeved outside the X-ray tube and is annular hollow, the outer wall of one side of the heat dissipation cover is embedded in the inner wall of the spectrometer head body and is in contact with the outside, the inner wall of the heat dissipation cover is sleeved outside the X-ray tube, a cooling liquid is filled in an annular cavity of the heat dissipation cover, the cooling liquid is an oil-water mixture of an upper layer and a lower layer when the cooling liquid is static, a turbulent flow ring is connected inside the annular cavity of the heat dissipation cover in a sliding mode, a through hole is formed inside the turbulent flow ring, a connecting pipe is fixedly connected to the lower end of the turbulent flow ring, the connecting pipe is arranged in two and is distributed at the bottom ends of the turbulent flow ring in, the utility model discloses a spectrometer handpiece, including spectrum appearance aircraft nose body, connecting pipe and holding ring, the outer movable sleeve of spectrum appearance aircraft nose body has been cup jointed to the outer cavity intercommunication in the annular of heat exchanger, the shielding cover is the hollow lead glass body of annular, the annular cavity inner chamber of shielding cover passes through the inner chamber intercommunication of connecting pipe and holding ring.

Preferably, the oil-water distribution ratio in the heat dissipation cover is 2: 1.

Preferably, the inner diameter of the through hole of the turbulent ring is gradually reduced from top to bottom.

Preferably, the inner ring area of the positioning ring is the same as the inner ring area of the bottom end of the X-ray tube, and the positioning ring and the X-ray tube are located on the same central axis.

The invention has the following beneficial effects:

1. the invention arranges the heat radiation cover on the periphery of the X-ray tube, and arranges the cooling liquid in the heat radiation cover into an upper layer and a lower layer of silicon oil and water, because the specific heat capacity of the silicone oil is smaller than that of water, the temperature of the upper layer of silicone oil is raised more quickly in the same time, thereby, so that the upper and lower sections of the X-ray tube generate temperature fields decreasing from top to bottom, when the X-ray passes through the high temperature section of the upper section, due to its low reflection intensity, the exit intensity of the X-rays can be mostly straight out of the X-ray tube, and thus, so that the sample below the X-ray tube can be irradiated by the X-ray set according to the projection direction of the X-ray tube, furthermore, the X-ray fluorescence generated by the sample bombarded by the X-ray can be mostly projected to the detector according to the angle setting, and simultaneously, after the detection is finished, the temperature of the water at the lower part in the heat dissipation cover can be timely reduced, so that the X-ray tube is prevented from being in a high-temperature state for a long time, and the performance safety of the X-ray tube is protected.

2. According to the spectrometer head, the shielding cover is arranged outside the spectrometer head body, so that on one hand, X-ray damage to detection personnel caused by diffuse reflection of X-rays generated by excitation of a sample to the outside is prevented by using the X-ray protection performance of the shielding cover, and on the other hand, heat dissipation in the heat dissipation cover after shutdown can be accelerated by water arranged in the shielding cover.

3. According to the invention, the flow disturbing ring is arranged and the through hole is formed in the flow disturbing ring, so that on one hand, the shielding cover can slide up and down to place a sample at the position of the positioning ring and play a role of a protective cover during detection, and on the other hand, water in the heat dissipation cover can be disturbed to achieve the effect of balanced heat dissipation of water temperature as soon as possible.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic perspective view of the connection between the connecting tube and the positioning ring according to the present invention;

fig. 3 is a schematic view of the shield cover of the present invention in various structural states during maximum downward travel.

In the figure: 1. a spectrometer head body; 2. an X-ray tube; 3. a detector; 4. a heat dissipation cover; 5. a flow disturbing ring; 6. connecting pipes; 7. a positioning ring; 8. a shield can.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, an X-ray tube heat dissipation mechanism for an X-ray fluorescence spectrometer comprises a spectrometer head body 1, an X-ray tube 2 and a detector 3 arranged in the spectrometer head body 1, wherein the X-ray tube 2 is used for emitting primary X-rays, the detector 3 is used for detecting characteristic X-rays, a heat dissipation cover 4 is sleeved outside the X-ray tube 2, the heat dissipation cover 4 is annular hollow, one outer wall of one side of the heat dissipation cover 4 is embedded in the inner wall of the spectrometer head body 1 and contacts with the outside, the inner wall of the heat dissipation cover 4 is sleeved outside the X-ray tube 2, a cooling liquid is filled in an annular cavity of the heat dissipation cover 4, the cooling liquid is an oil-water mixture of an upper layer and a lower layer during standing, the upper layer is silicone oil, the lower layer is water, a turbulence ring 5 is slidably connected in the annular cavity of the heat dissipation cover 4, a through hole is formed in the turbulence ring 5, a, connecting pipe 6 is two and is bilateral symmetry distribution in the bottom of spoiler ring 5, the inside and fixedly connected with holding ring 7 of heat exchanger 4 are run through to the bottom of connecting pipe 6, connecting pipe 6 is inside cavity with holding ring 7, and connecting pipe 6 and holding ring 7 all with the cavity intercommunication in the annular of heat exchanger 4, shield 8 has been cup jointed in the outside activity of spectrum appearance aircraft nose body 1, shield 8 is the hollow lead glass body of annular, the annular cavity inner chamber of shield 8 passes through the inner chamber intercommunication of connecting pipe and holding ring 7.

Thus, the working principle of the invention is as follows:

the method comprises the steps that heat is synchronously generated when X-rays are emitted from the inner part of an X-ray tube 2 for one time, the X-rays are preheated for a period of time before being generated, namely high pressure is loaded between a positive electrode and a negative electrode in the X-ray tube 2 for a period of time, the heat generated in the loading process is transferred into a heat dissipation cover 4 and absorbed by silicon oil and water in the heat dissipation cover 4, and the specific heat of the silicon oil is lower than that of the water, so that the silicon oil is heated more quickly in a short time compared with the water to form a temperature field which is gradually decreased from top to bottom, when the X-rays are emitted out, the wiring harness passes through the high-temperature section, the wiring harness is directly emitted due to low reflection intensity, so that the wiring harness at the end is understood to be filtered and corrected by the high-temperature section, the wiring harness with the existing angle is screened and filtered, and finally remained as a straight-ray beam, the straight-ray beam is all projected on a sample, therefore, the influence of the skew angle X-ray in the X-ray tube 2 on the excited sample is small, the detection precision of the sample can be improved, the precision can be understood that when the content of metal elements in the sample is low, longer projection time is needed to obtain the characteristic X-ray due to the influence of the skew angle X-ray, and the deviation generation of X-ray fluorescence can be influenced due to the existence of the skew angle X-ray in the same detection time, so that the detector 3 cannot effectively detect and measure, and the detection precision is influenced. After the equipment is detected and stopped once, the heat in the heat dissipation cover 4 can be directly conducted to the outside of the heat dissipation cover 4 through the silicon oil, and the heat of the silicon oil absorbed by the water is dissipated to the outside through the shell of the heat dissipation cover 4 and the water in the shielding cover 8. Meanwhile, the shielding cover 8 is pulled down in the detection stage, can shield and absorb X-ray diffuse reflection generated in the detection process in the spectrometer head body 1, and moves upwards in the end stage to drive the flow disturbing ring 5 to disturb water in the heat dissipation cover 4, so that the water in the heat dissipation cover 4 is dissipated in a balanced manner.

The oil-water distribution ratio in the heat dissipation cover 4 is 2:1, and the two thirds of the upper part of the heat dissipation cover 4 is a silicon oil section and the one third of the lower part of the heat dissipation cover is a water section, so that the filtering and screening effects of the silicon oil section and the cooling and heat dissipation effects of the water section can be balanced.

Wherein, the through-hole internal diameter of vortex ring 5 diminishes for from the top down gradually, and when shield cover 8 went upward, vortex ring 5 went upward in heat exchanger 4 that looses, and water is by this through-hole when passing through, by large aperture to small aperture, and its velocity of flow can be fast relatively, so, the fast rivers of outflow can improve the vortex effect.

The area of the inner ring of the positioning ring 7 is the same as that of the inner ring at the bottom end of the X-ray tube 2, and the positioning ring 7 and the X-ray tube 2 are located on the same central axis, so that a sample to be detected can be conveniently put under the positioning ring 7, the sample to be detected can be completely irradiated by the X-rays projected in the X-ray tube 2, and therefore, the device can be completely referenced by taking the content of the sample as a base number in a quantitative detection stage, and a detection result is more accurate.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.