CN211037363U - Gamma spectrometer lead shielding chamber - Google Patents

Abstract

The utility model discloses a plumbous shielded room of gamma spectrometer, include: the gamma detector comprises a body, a detection device and a control device, wherein the body is of a hollow structure and comprises a bottom wall and a side wall, a cavity with one open end is defined by the bottom wall and the side wall, a first mounting hole for mounting the gamma detector is formed in the bottom wall, and a sample inlet horizontally penetrating through the side wall is formed in the side wall; the top cover is detachably arranged above the body and can seal the opening of the cavity; the sample taking and placing mechanism is arranged on the outer side of the body and comprises an inlet sealing part and a sample placing part for containing samples, the sample placing part can extend into the cavity through the sample inlet, and the shape of the inlet sealing part is matched with that of the sample inlet so that when the sample placing part extends into the cavity, the inlet sealing part seals the sample inlet.

Description

Gamma spectrometer lead shielding chamber

Technical Field

The utility model relates to a plumbous shielded room of gamma spectrometer.

Background

In recent years, nuclear safety and environmental radiation monitoring have received increasing social attention, particularly since radioactive leaks have occurred in fukushima nuclear accidents, japan. Because the gamma rays emitted by the radioactive nuclide in the environment cannot be sensed by a human body, the gamma rays can be measured by a special gamma spectrometer. To make the detection result of the gamma ray more accurate, it is necessary to reduce the background caused by cosmic rays in addition to eliminating the noise background of the detector itself.

A typical shielding measure for reducing cosmic rays is to use a substance with a high atomic number as a shield. It is generally roughly considered that a 10cm thick lead shielding layer is the minimum for shielding cosmic rays. In practical use, a sample is often taken and placed, so the structure and the operation mode of the lead shielding chamber are very important.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a plumbous shielding room of gamma spectrometer can effectively reduce the frequency that operating personnel opened the top cap, reduces work load to be fit for being used for the long-time measurement analysis of sample.

According to an aspect of the utility model, a gamma spectrometer lead shielding room is provided, include: the gamma detector comprises a body, a detection device and a control device, wherein the body is of a hollow structure and comprises a bottom wall and a side wall, a cavity with one open end is defined by the bottom wall and the side wall, a first mounting hole for mounting the gamma detector is formed in the bottom wall, and a sample inlet horizontally penetrating through the side wall is formed in the side wall; the top cover is detachably arranged above the body and can seal the opening of the cavity; the sample taking and placing mechanism is arranged on the outer side of the body and comprises an inlet sealing part and a sample placing part for containing samples, the sample placing part can extend into the cavity through the sample inlet, and the shape of the inlet sealing part is matched with that of the sample inlet so that when the sample placing part extends into the cavity, the inlet sealing part seals the sample inlet.

According to the utility model discloses an embodiment, still include first guide rail, first guide rail follow the outside of lateral wall extends to in the sample entry, the sample is got and is put mechanism and slide and locate on the first guide rail, and the sample is got and is put the mechanism and can follow first guide rail slides in order to with the sample is placed the portion and is moved into and move out the cavity.

According to the utility model discloses a second guide rail in the outside of body is still included to set up, the second guide rail with first guide rail is parallel just the second guide rail is followed one side of body that is equipped with the sample entry extends to the opposite side of body, be equipped with on the second guide rail with second guide rail sliding connection's linkage slider, the linkage slider with the mechanism is got to the sample the entry sealing passes through connecting plate fixed connection so that with the linkage of entry sealing.

According to the utility model discloses a further embodiment, still include the regulator cubicle, the regulator cubicle includes stand, roof and puts the thing board, the roof with put the thing board and be parallel to each other just the roof is located put the top of thing board, the roof with put the thing board all with the stand is perpendicular, the body is located perpendicularly on the roof, be equipped with on the roof with the second mounting hole of first mounting hole coaxial line, first mounting hole with the second mounting hole is the through-hole, gamma detector is placed put on the thing board and gamma detector's probe passes in order the second mounting hole with first mounting hole extends in the cavity, gamma detector with first mounting hole with all be equipped with the sealing member between the second mounting hole.

According to another embodiment of the present invention, the first mounting hole is a non-through hole, and the gamma detector is mounted in the chamber through the first mounting hole.

According to the utility model discloses a first entry and second entry, the sample entry includes first entry and second entry, first entry with the second entry coaxial line sets up just first entry is located the outside of second entry, the internal diameter of first entry is greater than the internal diameter of second entry, the entry sealing makes first entry sealing cooperate with first entry including the first entry sealing that has the first diameter and the second entry sealing that has the second diameter, the second entry sealing cooperate with the second entry.

According to the utility model discloses a further embodiment still includes elevating system, elevating system with the top cap is connected, in order to control the lift of top cap.

According to the utility model discloses a further aspect, the top cap is the column, be equipped with on the circumference wall of top cap from the protruding portion that circumference wall extends, operating system includes eccentric wheel, eccentric wheel seat, rocker and lifter, the eccentric wheel through the pivot with the eccentric wheel seat rotates to be connected, the one end of rocker with the surface of eccentric wheel is through the perpendicular to the spliced pole fixed connection on the surface of eccentric wheel, the upper end of lifter is connected to the below of protruding portion, the lower extreme butt of lifter is in the outline of eccentric wheel is on the surface, so that the lifter can be along with thereby the rotation of eccentric wheel reciprocates and drives the top cap goes up and down.

According to the utility model discloses an embodiment still includes first bracket and second bracket, first bracket includes first layer board and the first stand that is parallel to each other, the second bracket includes second layer board and the second stand that is parallel to each other, first layer board with the second layer board is parallel, first guide rail is located on the first layer board, the second guide rail is located on the second layer board.

According to another embodiment of the present invention, the apparatus further comprises a controller and a manipulator, the controller is used for controlling the sample taking and placing mechanism to extend the sample to the inside of the chamber so that the gamma detector analyzes the sample, and after a certain time, controlling the sample taking and placing mechanism to move the analyzed sample out of the chamber, and the manipulator is used for taking the analyzed sample out of the sample placing part and placing the unanalyzed sample into the sample placing part.

According to another embodiment of the present invention, further comprising L ED indicator light assembly, said L ED indicator light assembly comprises L ED indicator lights of several different colors, each said L ED indicator light is used to indicate different states that said gamma spectrometer lead shielded room is in.

The above various embodiments of the present invention provide an aspect, a gamma spectrometer lead shielding room, including: the gamma detector comprises a body, a detection device and a control device, wherein the body is of a hollow structure and comprises a bottom wall and a side wall, a cavity with one open end is defined by the bottom wall and the side wall, a first mounting hole for mounting the gamma detector is formed in the bottom wall, and a sample inlet horizontally penetrating through the side wall is formed in the side wall; the top cover is detachably arranged above the body and can seal the opening of the cavity; the sample taking and placing mechanism is arranged on the outer side of the body and comprises an inlet sealing part and a sample placing part for placing a sample, the sample placing part can extend into the cavity through the sample inlet, and the shape of the inlet sealing part is matched with that of the sample inlet so that the sample inlet is sealed by the inlet sealing part when the sample placing part extends into the cavity; be different from the characteristics of the lead shielded cell of gamma spectrometer in prior art's needs frequently opened the top cap in order to get the sample, the utility model discloses a lead shielded cell of gamma spectrometer, after gamma detector installation finishes, the top cap no longer need frequently be opened, only need get the mechanism through the sample and extend the sample and carry out the analysis and detect in the cavity, after a period, get the mechanism through the sample and take out and put into the sample that the analysis finishes the sample portion of placing to can effectively reduce the frequency that operating personnel opened the top cap, reduce work load, and be fit for being used for the long-time measurement and analysis of sample, easy operation, efficiency is higher moreover.

Drawings

The invention will be explained in further detail with reference to the drawings, in which:

fig. 1 is a cross-sectional view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention;

fig. 2 is a perspective view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention;

fig. 3 is a front view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention;

fig. 4 is a rear view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention;

fig. 5 is a left side view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention;

fig. 6 is a right side view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention;

fig. 7 is a top view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention;

fig. 8 is a partial structural schematic diagram illustrating a gamma spectrometer lead shielding chamber according to an exemplary embodiment of the present invention;

fig. 9 is another partial structural schematic diagram illustrating a gamma spectrometer lead shielding chamber according to an exemplary embodiment of the present invention.

Reference numerals:

1-body, 11-bottom wall, 111-first mounting hole, 12-side wall, 121-sample inlet, 13-chamber;

2-top cover, 21-projection;

3-a sample taking and placing mechanism, 31-an inlet sealing part and 32-a sample placing part;

4-a first guide rail;

5-a second guide rail;

6-linkage slide block;

7-an electrical cabinet, 71-a vertical column, 72-a top plate, 721-a second mounting hole and 73-a storage plate;

8-lifting mechanism, 81-eccentric wheel, 82-eccentric wheel seat, 83-rocker, 84-lifting piece, 85-rotating shaft and 86-connecting column;

9-a first bracket;

10-a second carrier;

14-L ED indicator light assembly;

15-fomes castors, 151-support blocks, 152-wheels;

16-emergency stop button;

17-a connecting plate;

18-fixing member.

Detailed Description

While the present invention will be fully described with reference to the accompanying drawings, which contain preferred embodiments of the invention, it is to be understood that those skilled in the art can, prior to this description, modify the embodiments described herein while obtaining the technical effects of the invention. Therefore, it should be understood that the foregoing description is a broad disclosure directed to persons of ordinary skill in the art, and is not intended to limit the exemplary embodiments of the invention described herein.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.

At present, the structure and the operation mode of a lead shielding chamber mainly have the following problems: firstly, in the process of taking and placing a sample, a top cover of a lead shielding chamber needs to be opened frequently, and the workload brought to operators is relatively large due to the fact that the weight of the top cover of the lead shielding chamber is large; secondly, the operation of the existing lead shielding chamber needs manual operation, the working efficiency is low, and the lead shielding chamber is not suitable for long-time test and analysis.

According to the present general technical concept, a gamma spectrometer lead shielding room, includes: the gamma detector comprises a body, a detection device and a control device, wherein the body is of a hollow structure and comprises a bottom wall and a side wall, a cavity with one open end is defined by the bottom wall and the side wall, a first mounting hole for mounting the gamma detector is formed in the bottom wall, and a sample inlet horizontally penetrating through the side wall is formed in the side wall; the top cover is detachably arranged above the body and can seal the opening of the cavity; the sample taking and placing mechanism is arranged on the outer side of the body and comprises an inlet sealing part and a sample placing part for containing samples, the sample placing part can extend into the cavity through the sample inlet, and the shape of the inlet sealing part is matched with that of the sample inlet so that when the sample placing part extends into the cavity, the inlet sealing part seals the sample inlet.

Fig. 1 is a cross-sectional view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention; fig. 2 is a perspective view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention; fig. 3 is a front view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention; fig. 4 is a rear view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention; fig. 5 is a left side view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention; fig. 6 is a right side view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention; fig. 7 is a top view showing a gamma spectrometer lead shielded room according to an exemplary embodiment of the present invention; fig. 8 is a partial structural schematic diagram illustrating a gamma spectrometer lead shielding chamber according to an exemplary embodiment of the present invention; fig. 9 is another partial structural schematic diagram illustrating a gamma spectrometer lead shielding chamber according to an exemplary embodiment of the present invention.

As shown in fig. 1 and 2, in the illustrated embodiment, the present invention provides a gamma spectrometer lead shielding chamber, comprising: the body 1 is a hollow structure and comprises a bottom wall 11 and a side wall 12, the bottom wall 11 and the side wall 12 enclose a chamber 13 with one open end, a first mounting hole 111 for mounting a gamma detector is formed on the bottom wall 11, and a sample inlet 121 horizontally penetrating through the side wall 12 is formed on the side wall 12; the top cover 2 is detachably arranged above the body 1 and can seal the opening of the cavity 13; the sample taking and placing mechanism 3 is arranged on the outer side of the body 1, the sample taking and placing mechanism 3 comprises an inlet sealing part 31 and a sample placing part 32 for placing samples, the sample placing part 32 can extend into the cavity 13 through the sample inlet 121, and the shape of the inlet sealing part 31 is matched with that of the sample inlet 121, so that when the sample placing part 32 extends into the cavity 13, the inlet sealing part 31 seals the sample inlet 121. In the illustrated embodiment, the body 1 and the top cover 2 are both of a cylindrical structure, and a top cover handle is arranged on the top surface of the top cover 2, and the top cover handle is spherical for opening and closing the top cover 2. A first mounting hole 111 is formed at a central position of the bottom wall 11, and an inner diameter of the first mounting hole 111 is smaller than an inner diameter of the chamber 13. The utility model discloses a this kind of setting, after gamma detector installation finishes, top cap 2 no longer need frequently be opened, only need get through the sample put mechanism 3 with the sample extend the cavity 13 in carry out the analysis and detect, after a period, get through the sample put mechanism 3 and take out the sample that the analysis finishes and put into with unanalyzed sample the sample portion 32 of placing, the top cap is frequently opened in order to get the characteristics of putting the sample to the needs of the plumbous shielding chamber of gamma spectrometer who distinguishes among the current design, the utility model discloses can effectively reduce the frequency that operating personnel opened the top cap, reduce work load to be fit for being used for the long-time measurement and analysis of sample, easy operation, efficiency is higher moreover.

In a specific embodiment, because composition such as mu meson in the cosmic ray can emit characteristic X ray with heavy shielding material effect, for this reason, the utility model discloses a body 1 of gamma spectrometer lead shielding room sets up the shielding layer of being made by multiple different materials, specifically, from outer to inner, the shielding layer of body 1 is low carbon steel shielding layer, lead shielding layer, oxygen-free copper shielding layer in proper order, can also be provided with polyethylene shielding layer at the inlayer of body 1 to reach the mesh of shielding the neutron. The lead shielding layer is preferably not less than 10cm thick. Meanwhile, the inlet sealing part 31 and the sample placing part 32 of the sample taking and placing mechanism 3 are also preferably covered with a lead shielding layer having a thickness of 10 cm.

Further, in order to save labor cost and realize 24-hour uninterrupted analysis, and improve efficiency more effectively, the gamma spectrometer lead shielding chamber of the embodiment of the present invention further includes a controller and a manipulator, wherein the controller is configured to control the sample taking and placing mechanism 3 to extend the sample to the inside of the chamber 13 so that the gamma detector analyzes the sample, and after a specific time, the sample taking and placing mechanism 3 is configured to move the analyzed sample out of the chamber 13, and the manipulator is configured to take the analyzed sample out of the sample placing portion 32 and place the unanalyzed sample into the sample placing portion 32. In order to control time accurately, the gamma spectrometer lead shielding chamber of the embodiment of the present invention may further include a timer for calculating the time for analyzing the sample in the chamber 13, and after the sample analysis is completed, the analyzed sample is taken out and the unanalyzed sample is placed in the placing portion 32.

In one embodiment, as shown in fig. 2 and 7, the gamma spectrometer lead shielded room of the present invention further comprises L ED indicator light assembly 14, said L ED indicator light assembly 14 comprises a plurality of L ED indicator lights of different colors, each said L ED indicator light is used to indicate different states of the gamma spectrometer lead shielded room, more specifically, in the embodiment shown in fig. 2 and 7, L ED indicator light assembly 14 comprises 4L ED indicator lights indicating different states of the gamma spectrometer lead shielded room, 4L ED indicator lights respectively correspond to four operating states of "power", "sample inlet open", "sample inlet closed" and "failure" indicating the gamma spectrometer lead shielded room, the state of the gamma spectrometer lead shielded room can be directly known by observing L ED indicator lights.

Further, as shown in fig. 1 and 3, a first guide rail 4 is further included, the first guide rail 4 extends from the outside of the side wall 12 to the sample inlet 121, the sample pick and place mechanism 3 is slidably disposed on the first guide rail 4, and the sample pick and place mechanism 3 can slide along the first guide rail 4 to move the sample placing part 32 into and out of the chamber 13. The length direction of the first guide rail 4 is parallel to the center line of the sample inlet 121 to ensure good fit of the sample pick and place mechanism 3 with the sample inlet 121. As shown in fig. 1, the left end of the first guide rail 4 extends into the sample inlet 121 to ensure that the sample pick and place mechanism 3 extends into the sample inlet 121 as far as possible. Further, a gripping structure is preferably provided at the left end of the first guide rail 4, and the gripping structure grips the sample pick-and-place mechanism 3 when the sample pick-and-place mechanism 3 is completely engaged with the sample inlet 121, so as to ensure that the sample pick-and-place mechanism 3 is reliably fixed in the sample inlet 121.

In another embodiment, as shown in fig. 5-8, the present invention further includes a second guide rail 5 disposed outside the body 1, the second guide rail 5 is parallel to the first guide rail 4, the second guide rail 5 extends from the side of the body 1 where the sample inlet 121 is disposed to the opposite side of the body 1, a linkage slider 6 slidably connected to the second guide rail 5 is disposed on the second guide rail 5, and the linkage slider 6 is fixedly connected to the inlet sealing portion 31 of the sample taking and placing mechanism 3 through a connecting plate 17 so as to be linked with the inlet sealing portion 31. The linkage slide block 6 linked with the sample taking and placing mechanism 3 can play a role of driving the sample taking and placing mechanism 3 on one hand, and on the other hand, the linkage slide block 6 and the second guide rail 5 can play a role of enhancing the movement precision of the sample taking and placing mechanism 3 and preventing the movement of the sample taking and placing mechanism 3 from deflecting. The above process of using the controller to control the sample taking and placing mechanism 3 to extend the sample into the chamber 13 and to control the sample taking and placing mechanism 3 to move the analyzed sample out of the chamber 13 can be realized by controlling the sliding of the linked slide 6 on the second guide rail 5.

In yet another embodiment, as shown in fig. 1 and 6, the present invention further comprises an electrical cabinet 7, the electrical cabinet 7 comprises a vertical column 71, a top plate 72 and an object placing plate 73, wherein the top plate 72 and the object placing plate 73 are parallel to each other, the top plate 72 is arranged above the object placing plate 73, the top plate 72 and the object placing plate 73 are both vertical to the upright post 71, the body 1 is vertically arranged on the top plate 72, a second mounting hole 721 coaxial with the first mounting hole 111 is formed on the top plate 72, the first mounting hole 111 and the second mounting hole 721 are through holes, the gamma probe is placed on the object placing plate 73, and the probe of the gamma probe sequentially passes through the second mounting hole 721 and the first mounting hole 111 to extend into the chamber 13, a sealing member is disposed between the gamma probe and each of the first and second mounting holes 111 and 721. In this embodiment, the gamma detector is installed in the electrical cabinet 7, so that the requirement on the volume of the lead shielding chamber of the gamma spectrometer can be reduced. The gamma detector may be a sodium iodide gamma detector or a high purity germanium gamma detector, and in the case of the sodium iodide gamma detector, a photomultiplier tube portion of the sodium iodide gamma detector is installed in the first installation hole 111, and in the case of the high purity germanium gamma detector, a cold finger portion of the high purity germanium gamma detector is installed in the first installation hole 111.

In another embodiment, the first mounting hole 111 is a non-through hole, and the gamma detector is mounted in the chamber 13 through the first mounting hole 111. The gamma detector is arranged in the body 1 of the gamma spectrometer lead shielding chamber, so that the sealing effect of the body 1 can be ensured.

In order to improve the flexibility of the gamma spectrometer lead shielding chamber, as shown in fig. 2, in one embodiment, four horizontal adjustment fumonist casters 15 can be further installed in the gamma spectrometer lead shielding chamber, wherein the support blocks 151 are spaced from the ground when the support blocks 151 are retracted, the wheels 152 move freely, the support blocks 151 are grounded when the support blocks 151 are supported, the wheels 152 are fixed, the fumonist casters 15 can facilitate the movement, height adjustment and positioning of the gamma spectrometer lead shielding chamber and have vibration-proof performance, further, as shown in fig. 1 and 2, the bottom of the upright column 71 is further provided with a fixing member 18, the fixing member 18 is in the shape of L, and after the gamma spectrometer lead shielding chamber is moved to a preset position, the fixing member 18 can be used for stable placement and fixation.

As shown in fig. 1 and 9, in one embodiment, the sample inlet 121 includes a first inlet and a second inlet, the first inlet is coaxially disposed with the second inlet and is located outside the second inlet, the first inlet has an inner diameter larger than that of the second inlet, and the inlet sealing portion 31 includes a first inlet sealing portion having a first diameter and a second inlet sealing portion having a second diameter such that the first inlet sealing portion is engaged with the first inlet and the second inlet sealing portion is engaged with the second inlet. In fig. 1, the first inlet extends from the outside of the side wall into the side wall and the second inlet extends from the inside of the side wall to the inside of the side wall. By designing the sample inlet 121 to be a first inlet and a second inlet having different sizes, multiple sealing can be achieved by cooperation with the inlet seal portion 31 and the sample placement portion 32. As shown in fig. 1 and 7, the body 1 has a cylindrical shape, and the center lines of the sample taking and placing mechanism 3 and the sample inlet 121 intersect with the axis of the body 1. When the body 1 has a cylindrical shape, in order to match the shape of the body 1, the outer edge of the inlet sealing portion 31 is preferably provided in an arc-shaped structure matching the curvature of the cylindrical structure of the body 1 to tightly seal the sample inlet 121. In one embodiment, the sample placement portion 32 is a sample bracket.

Because the weight of the top cover 2 is relatively large, in the process of installing the gamma detector, in order to facilitate the opening and closing of the top cover 2, in an embodiment, the utility model discloses still include elevating system 8, elevating system 8 with the top cover 2 is connected, in order to control the lift of top cover 2.

More specifically, in one embodiment, as shown in fig. 2 and 4, the top cover 2 is cylindrical, the protrusion 21 is disposed on the circumferential wall surface of the top cover 2 and extends from the circumferential wall surface, the lifting system 8 includes an eccentric 81, an eccentric seat 82, a rocker 83 and a lifting member 84, the eccentric 81 is rotatably connected to the eccentric seat 82 through a rotating shaft 85, one end of the rocker 83 is fixedly connected to the surface of the eccentric 81 through a connecting column 86 perpendicular to the surface of the eccentric 81, the upper end of the lifting member 84 is connected to the lower portion of the protrusion 21, and the lower end of the lifting member 84 abuts against the outer contour surface of the eccentric 81, so that the lifting member 84 can move up and down along with the rotation of the eccentric 81 to drive the top cover 2 to lift. In the embodiment shown in fig. 5, the protrusions 21 are provided in a total of 2 and in parallel with each other on both ends of the circumferential wall surface of the top cover 2, respectively. As shown in fig. 7, the protruding portion 21 has a substantially trapezoidal shape, and the width of the protruding portion 21 gradually decreases from the circumferential wall surface of the top cover 2 to a position away from the circumferential wall surface. In order to ensure the reliability of the installation of the lifter 84, as shown in fig. 4, a guide sleeve slidably connected to the lifter 4 is further provided on the circumferential wall surface of the body 1 to restrain the lifter 4 without affecting the ascending and descending of the lifter 4. The lifting system 8 may also be a hydraulic cylinder or the like.

As shown in fig. 6, the present invention further comprises a first bracket 9 and a second bracket 10, wherein the first bracket 9 comprises a first supporting plate and a first vertical column parallel to each other, the second bracket 10 comprises a second supporting plate and a second vertical column parallel to each other, the first supporting plate is parallel to the second supporting plate, the first guide rail 4 is disposed on the first supporting plate, and the second guide rail 5 is disposed on the second supporting plate. The first carriage 9 and the second carriage 10 are preferably liftable mechanisms to facilitate adjustment of the height of the sample pick and place mechanism 3.

It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.

Having described preferred embodiments of the present invention in detail, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope and spirit of the appended claims, and the invention is not to be limited to the exemplary embodiments set forth in the specification.

It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. Additionally, any element numbers of the claims should not be construed as limiting the scope of the invention.

Claims (10)

1. A gamma spectrometer lead shielded room, comprising:

the sample injection device comprises a body (1), wherein the body (1) is of a hollow structure and comprises a bottom wall (11) and a side wall (12), the bottom wall (11) and the side wall (12) enclose a chamber (13) with one open end, a first mounting hole (111) is formed in the bottom wall (11), and a sample inlet (121) horizontally penetrating through the side wall (12) is formed in the side wall (12);

the top cover (2) is detachably arranged above the body (1) and can seal the opening of the cavity (13);

the sample taking and placing mechanism (3) is arranged on the outer side of the body (1), the sample taking and placing mechanism (3) comprises an inlet sealing part (31) and a sample placing part (32), the sample placing part (32) can extend into the cavity (13) through the sample inlet (121), and the shape of the inlet sealing part (31) is matched with that of the sample inlet (121).

2. The gamma spectrometer lead shielding chamber according to claim 1, characterized in that it further comprises a first guide rail (4), said first guide rail (4) extending from the outside of said side wall (12) into said sample inlet (121), said sample pick and place mechanism (3) being slidably arranged on said first guide rail (4), and said sample pick and place mechanism (3) being slidable along said first guide rail (4).

3. The gamma spectrometer lead shielding chamber according to claim 2, characterized by further comprising a second guide rail (5) arranged outside the body (1), wherein the second guide rail (5) is parallel to the first guide rail (4) and the second guide rail (5) extends from the side of the body (1) where the sample inlet (121) is arranged to the opposite side of the body (1), a linkage slider (6) slidably connected with the second guide rail (5) is arranged on the second guide rail (5), and the linkage slider (6) is fixedly connected with the inlet sealing part (31) of the sample taking and placing mechanism (3) through a connecting plate (17).

4. The gamma spectrometer lead shielding chamber according to claim 1, further comprising an electrical cabinet (7), wherein the electrical cabinet (7) comprises a vertical column (71), a top plate (72) and an object placing plate (73), the top plate (72) and the object placing plate (73) are parallel to each other, the top plate (72) is disposed above the object placing plate (73), the top plate (72) and the object placing plate (73) are both perpendicular to the vertical column (71), the body (1) is vertically disposed on the top plate (72), a second mounting hole (721) coaxial with the first mounting hole (111) is disposed on the top plate (72), the first mounting hole (111) and the second mounting hole (721) are both through holes, a gamma detector is disposed on the object placing plate (73), and a probe of the gamma detector sequentially passes through the second mounting hole (721) and the first mounting hole (111) and extends into the chamber (13), and sealing elements are arranged between the gamma detector and the first mounting hole (111) and between the gamma detector and the second mounting hole (721).

5. The gamma spectrometer lead shielding room as claimed in claim 1, characterized in that the first mounting hole (111) is a non-through hole, and the gamma detector is mounted in the chamber (13) through the first mounting hole (111).

6. The gamma spectrometer lead shielding chamber according to claim 1, characterized in that the sample inlet (121) comprises a first inlet and a second inlet, the first inlet being arranged coaxially with the second inlet and the first inlet being located outside the second inlet, the first inlet having an inner diameter larger than the inner diameter of the second inlet, the inlet seal (31) comprising a first inlet seal having a first diameter and a second inlet seal having a second diameter such that the first inlet seal mates with the first inlet and the second inlet seal mates with the second inlet.

7. The gamma spectrometer lead shielding room as claimed in claim 1, characterized in that it further comprises a lifting mechanism (8), said lifting mechanism (8) being connected to said top cover (2) to control the lifting of said top cover (2).

8. The gamma spectrometer lead shielding chamber according to claim 7, characterized in that the top cover (2) is cylindrical, a protrusion (21) extending from the circumferential wall surface is arranged on the circumferential wall surface of the top cover (2), the lifting mechanism (8) comprises an eccentric wheel (81), an eccentric wheel seat (82), a rocker (83) and a lifting piece (84), the eccentric wheel (81) is rotatably connected with the eccentric wheel seat (82) through a rotating shaft (85), one end of the rocker (83) is fixedly connected with the surface of the eccentric wheel (81) through a connecting column (86) perpendicular to the surface of the eccentric wheel (81), the upper end of the lifting piece (84) is connected to the lower part of the protrusion (21), and the lower end of the lifting piece (84) abuts against the outer contour surface of the eccentric wheel (81).

9. The gamma spectrometer lead shielding chamber according to claim 3, characterized by further comprising a first bracket (9) and a second bracket (10), wherein the first bracket (9) comprises a first supporting plate and a first vertical column parallel to each other, the second bracket (10) comprises a second supporting plate and a second vertical column parallel to each other, the first supporting plate and the second supporting plate are parallel, the first guide rail (4) is arranged on the first supporting plate, and the second guide rail (5) is arranged on the second supporting plate.

10. The gamma spectrometer lead shielded room as claimed in claim 1, further comprising L ED indicator light assemblies (14), the L ED indicator light assemblies (14) comprising L ED indicator lights of several different colors.

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