Sealed liquid flash continuous measuring device

Abstract

The invention provides a sealed liquid flash continuous measurement device which comprises a detector, a shielding main body, a sealing mechanism and a charging mechanism. A shading piston of the sealing mechanism can shade light from a communication port for communicating an accommodating cavity for accommodating a detector and a measuring cavity for accommodating a measuring bottle, so that the detector is not easily influenced by an optical signal; in the process that the loading piece drives the measuring bottle to push away the shading piston to reach the communication port, the cover plate is driven by the driving assembly to block the opening, so that external optical signals are not prone to entering from the opening, and the detector is not prone to being affected by the optical signals; in this way, the detector is not prone to being affected by the light signals in the whole process of conducting liquid flash measurement on the to-be-measured sample in the measuring bottle, the detector does not need to stand in the liquid flash measurement process, and the measuring efficiency of the sealed liquid flash continuous measuring device can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radionuclide measurement, in particular to a sealed liquid scintillation continuous measurement device. BACKGROUND

[0002] As a technology for radionuclide measurement, liquid scintillation measurement is widely used in alpha, beta and nuclide measurement, especially in the detection of low-energy beta nuclides, which can detect 241 Am, 210 Po, 32 P, 90 Sr, 3 H, 14 C, 212 Po, 90 Y, 231 Pa and 177 Lu, etc. Industrial and medical isotopes. Play an irreplaceable role in life science, medicine, environmental monitoring, radioactive dating, nuclear industry and basic research, especially in the measurement of tritium. Liquid scintillation measurement has become a commonly used measurement scheme.

[0003] Usually, when performing liquid scintillation measurement, cosmic rays in the measurement cavity need to be shielded to reduce the background count, and at the same time, light signal in the measurement cavity is weakened by means such as light-proof placement to improve the accuracy of the measurement result. However, the current measurement cavity is easy to introduce light signal during the process of sample in and out, so that the detector has to be stationary for a long time, which seriously affects the improvement of liquid scintillation measurement efficiency. SUMMARY

[0004] In view of the above problems, the present application provides a sealed liquid scintillation continuous measurement device which can improve the measurement efficiency.

[0005] The present application provides a sealed liquid scintillation continuous measurement device, which comprises a detector, a shielding body, a sealing mechanism and a loading mechanism. The detector is used for liquid scintillation measurement of the sample to be measured in the measuring bottle. The shielding body is provided with a containing cavity and a measuring cavity. The containing cavity is communicated with the containing cavity through a communication port. The detector is arranged in the containing cavity. One end of the measuring cavity has an opening. The measuring cavity is used to accommodate the measuring bottle. The sealing mechanism comprises a light shielding piston which is movably connected in the measuring cavity. The light shielding piston is used to shield the communication port. The loading mechanism comprises a driving assembly, a cover plate and a loading piece. The cover plate and the loading piece are connected to the output end of the driving assembly. The loading piece is movably connected to the cover plate and is used to carry the measuring bottle. Under the driving of the driving assembly, after the cover plate blocks the opening, the loading piece can drive the measuring bottle to push away the light shielding piston to the communication port.

[0006] In the structure, in the state that the opening is not blocked by the cover plate, the light shielding piston of the sealing mechanism can shield the communication port through which the containing cavity containing the detector is communicated with the measuring cavity for containing the measuring bottle, so that the detector is not easily affected by the light signal; in the process that the measuring bottle is pushed away from the light shielding piston by the loading piece to reach the communication port, the cover plate has been kept to block the opening under the driving of the driving assembly, so that the external light signal is not easily entered from the opening, and the detector is not easily affected by the light signal, which makes the detector not easily affected by the light signal in the whole process of liquid scintillation measurement on the sample to be measured in the measuring bottle, so that the detector does not need to be stationary during the liquid scintillation measurement, so that the sealing type liquid scintillation continuous measurement device can perform continuous measurement, and the measurement efficiency of the sealing type liquid scintillation continuous measurement device is improved.

[0007] According to the sealing type liquid scintillation continuous measurement device provided by some embodiments of the present application, the sealing mechanism further comprises a counterweight structure connected to the light shielding piston, the light shielding piston is sealingly and slidingly connected in the measuring cavity, the measuring cavity extends in the vertical direction, the opening is located below the communication port, and under the action of gravity, the light shielding piston can slide to below the communication port to shield the communication port.

[0008] According to the sealing type liquid scintillation continuous measurement device provided by some embodiments of the present application, the surface of the light shielding piston facing the opening is provided with a buffer structure.

[0009] According to the sealing type liquid scintillation continuous measurement device provided by some embodiments of the present application, the sealing mechanism further comprises an elastic member, the light shielding piston is connected to the inner wall surface of the measuring cavity through the elastic member, and under the action of the elastic restoring force of the elastic member, the light shielding piston can push the measuring bottle to move towards the opening.

[0010] According to the sealing type liquid scintillation continuous measurement device provided by some embodiments of the present application, the sealing type liquid scintillation continuous measurement device further comprises a guide sleeve, the guide sleeve is connected to the shielding main body, the inner cavity of the guide sleeve is communicated with the measuring cavity, and in the direction from the opening to the communication port, the radial dimension of the inner cavity of the guide sleeve gradually decreases.

[0011] According to the sealing type liquid scintillation continuous measurement device provided by some embodiments of the present application, at least part of the guide sleeve is located in the measuring cavity, the wall of the guide sleeve located in the measuring cavity protrudes from the inner wall surface of the measuring cavity and comprises an end surface facing the light shielding piston, the end surface is located between the opening and the communication port, and the light shielding piston can abut against the end surface to shield the communication port.

[0012] According to the sealed liquid scintillation continuous measurement device provided by some embodiments of the present application, the driving assembly comprises a first lifting device and a second lifting device, the second lifting device is connected to the output end of the first lifting device, the cover plate is connected to the output end of the second lifting device, and under the driving of the first lifting device, the cover plate can block the opening; under the driving of the second lifting device, the loading piece can drive the measuring bottle to move in the measuring cavity so that the measuring bottle pushes away the light shielding piston to reach the communication port.

[0013] According to the sealed liquid scintillation continuous measurement device provided by some embodiments of the present application, the first lifting device and the second lifting device are arranged in a direction perpendicular to the direction in which the opening faces.

[0014] According to the sealed liquid scintillation continuous measurement device provided by some embodiments of the present application, the first lifting device and the second lifting device are both configured as air cylinders.

[0015] According to the sealed liquid scintillation continuous measurement device provided by some embodiments of the present application, the cover plate is provided with a loading hole, the loading piece is movably connected to the loading hole, and the loading piece can be placed in the loading hole to form a groove with the cover plate for placing the measuring bottle.

[0016] The technical solutions provided by the embodiments of the present application at least bring the following beneficial effects:

[0017] The embodiments of the present application provide a sealed liquid scintillation continuous measurement device, which comprises a detector, a shielding main body, a sealing mechanism and a loading mechanism, the detector is used for performing liquid scintillation measurement on a sample to be measured in a measuring bottle; the shielding main body is provided with a containing cavity and a measuring cavity, the containing cavity is communicated with the containing cavity through a communication port, the detector is arranged in the containing cavity, one end of the measuring cavity has an opening, and the measuring cavity is used for containing the measuring bottle; the sealing mechanism comprises a light shielding piston, the light shielding piston is movably connected to the measuring cavity, and the light shielding piston is used for shielding the communication port; the loading mechanism comprises a driving assembly, a cover plate and a loading piece, the cover plate and the loading piece are both connected to the output end of the driving assembly, the loading piece is movably connected to the cover plate and is used for carrying the measuring bottle; under the driving of the driving assembly, after the cover plate blocks the opening, the loading piece can drive the measuring bottle to push away the light shielding piston to reach the communication port.

[0018] In the structure, in the state that the opening is not blocked by the cover plate, the light shielding piston of the sealing mechanism can shield the communication port of the accommodation cavity containing the detector and the measuring cavity for accommodating the measuring bottle, so that the detector is not easily affected by the light signal; in the process that the measuring bottle is pushed away from the light shielding piston by the loading piece to reach the communication port, the cover plate has been kept to block the opening under the driving of the driving assembly, so that the external light signal is not easy to enter from the opening, and the detector is not easy to be affected by the light signal, which makes the detector not easy to be affected by the light signal in the whole process of liquid scintillation measurement on the sample in the measuring bottle, so that the detector does not need to be static during the liquid scintillation measurement, so that the sealing type liquid scintillation continuous measurement device can be continuously measured, which is beneficial to improve the measurement efficiency of the sealing type liquid scintillation continuous measurement device.

[0019] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0020] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered limiting the present application. Moreover, the same reference symbols are used throughout the drawings to represent the same parts. In the drawings:

[0021] Figure 1 The internal structure schematic diagram of the sealing type liquid scintillation continuous measurement device provided by some embodiments of the present application in the state that the measuring bottle does not enter the measuring cavity;

[0022] Figure 2 The internal structure schematic diagram of the sealing type liquid scintillation continuous measurement device provided by some embodiments of the present application in the state that the cover plate blocks the opening;

[0023] Figure 3 The internal structure schematic diagram of the sealing type liquid scintillation continuous measurement device provided by some embodiments of the present application in the state that the measuring bottle is sent to the communication port.

[0024] In the drawings:

[0025] 1, detector;

[0026] 2, shielding body; 21, accommodation cavity; 22, measuring cavity; 221, opening; 23, communication port;

[0027] 3, sealing mechanism; 31, light shielding piston; 32, counterweight structure; 33, buffer structure; 34, elastic member;

[0028] 4, charging mechanism; 41, driving assembly; 411, first lifting device; 412, second lifting device; 42, cover plate; 421, charging hole; 43, charging piece; 44, groove;

[0029] 5, guide sleeve; 51, end face;

[0030] 10, measuring bottle. DETAILED DESCRIPTION

[0031] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0032] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meaning understood by the skilled person in the field to which the embodiments of the present application belong.

[0033] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0034] In addition, the technical terms "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0035] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0037] In the field of radionuclide measurement technology, liquid scintillation measurement as an important measurement method can efficiently receive the energy of low-energy beta nuclides and is widely used in the fields of life science, medicine, environmental monitoring, radioactive dating, nuclear industry and basic research. Among them, for the measurement of the radioactive nuclide tritium, liquid scintillation measurement has become a commonly used measurement scheme.

[0038] When radionuclides are measured by using liquid scintillation measurement technology, not only the cosmic rays in the environment need to be shielded to reduce the background count, but also the light signal in the measurement cavity needs to be weakened to reduce the influence on the detector, so as to improve the accuracy of the measurement result.

[0039] In some cases, frequent sample measurement or online continuous measurement is usually required, which requires that the measurement device can realize automatic sampling. The existing automatic sampling technology in the measurement device mainly has two kinds. One is to set the measurement cavity as an open cover structure, and the measured sample is sent into the measurement cavity by human or mechanical mechanism, but in this process, the light signal will enter the measurement cavity through the open cover structure, and the detector for measuring the measured sample in the measurement cavity will be affected by the light signal, and needs to be stationary before the next measurement. The other is to directly embed the measurement bottle in the measurement cavity, and the measured sample is injected into the measurement bottle through pipeline transmission and other ways. In this continuous measurement mode, the measured sample cannot be completely emptied due to wall hanging and other reasons, which is easy to contaminate the next measured sample, and the accuracy of the measurement result is difficult to guarantee.

[0040] To improve the measurement efficiency of liquid scintillation measurement, some embodiments of this application provide a sealed continuous liquid scintillation measurement device. This device includes a detector, a shielding body, a sealing mechanism, and a loading mechanism. The detector is used to perform liquid scintillation measurement on the sample in the measurement bottle. The shielding body has a receiving cavity and a measuring cavity, which are connected to each other via a connecting port. The detector is located in the receiving cavity, and one end of the measuring cavity has an opening for accommodating the measurement bottle. The sealing mechanism includes a light-shielding piston, which is movably connected to the measuring cavity and used to shield the connecting port from light. The loading mechanism includes a driving assembly, a cover plate, and a loading component. Both the cover plate and the loading component are connected to the output end of the driving assembly. The loading component is movably connected to the cover plate and used to support the measurement bottle. Under the drive of the driving assembly, after the cover plate seals the opening, the loading component can push the measurement bottle past the light-shielding piston to reach the connecting port. In the above structure, when the opening is not blocked by the cover plate, the light-shielding piston of the sealing mechanism can block the light from the connection port between the receiving cavity containing the detector and the measuring cavity for containing the measuring bottle, making the detector less susceptible to the influence of light signals. During the process of the inserting component pushing the measuring bottle to push the light-shielding piston to reach the connection port, the cover plate has been kept blocking the opening under the drive of the drive component, making it difficult for external light signals to enter from the opening, and the detector is also less susceptible to the influence of light signals. This makes the detector less susceptible to the influence of light signals throughout the entire process of liquid scintillation measurement of the sample in the measuring bottle, so that the detector does not need to be stationary during the liquid scintillation measurement process. This allows the sealed liquid scintillation continuous measurement device to perform continuous measurement, which is beneficial to improving the measurement efficiency of the sealed liquid scintillation continuous measurement device.

[0041] The technical solution of a sealed liquid flashover continuous measurement device will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] Embodiments of this application provide a sealed liquid scintillation continuous measurement device, with reference to... Figure 1 The sealed liquid scintillation continuous measurement device includes a detector 1, a shielding body 2, a sealing mechanism 3, and a loading mechanism 4. The detector 1 is used to perform liquid scintillation measurement on the sample to be tested in the measurement bottle 10. The shielding body 2 is provided with a receiving cavity 21 and a measuring cavity 22. The receiving cavity 21 is connected to the measuring cavity 22 through a connecting port 23. The detector 1 is disposed in the receiving cavity 21. One end of the measuring cavity 22 has an opening 221, and the measuring cavity 22 is used to receive the measuring bottle 10. The sealing mechanism 3 includes a light-shielding piston 31, which is movably connected to the measuring cavity 22 and is used to shield the connecting port 23 from light. The loading mechanism 4 includes a drive assembly 41, a cover plate 42, and a loading component 43. The cover plate 42 and the loading component 43 are both connected to the output end of the drive assembly 41. The loading component 43 is movably connected to the cover plate 42 and is used to carry the measuring bottle 10. Figure 2 andFigure 3 Under the driving of the driving assembly 41, after the cover plate 42 blocks the opening 221, the loading piece 43 can drive the measuring bottle 10 to push away the light shielding piston 31 to reach the communication port 23.

[0043] The detector 1 can be a device for directly performing liquid scintillation measurement on the sample in the measuring bottle 10 in the sealed liquid scintillation continuous measurement device. Illustratively, it can include a liquid scintillation counter, which can complete the conversion of the fluorescent signal to an electric signal and convert the electric signal into the required data for output.

[0044] The shielding body 2 can be a device for forming the measuring cavity 22 in the sealed liquid scintillation continuous measurement device, which can not only shield cosmic rays and spontaneous background in the environment, but also provide a light-proof environment for the measuring cavity 22 and the detector 1. Illustratively, the shielding body 2 can be made of lead, and the inner walls of the containing cavity 21 and the measuring cavity 22 formed thereby are provided with oxygen-free copper.

[0045] The containing cavity 21 and the measuring cavity 22 can be two cavity structures provided in the shielding body 2. Among them, the containing cavity 21 is used to contain the detector 1, and the measuring cavity 22 is used to contain the measuring bottle 10, providing a measurement position for liquid scintillation measurement on the sample in the measuring bottle 10. The containing cavity 21 is in communication with the containing cavity 21 through the communication port 23, which means that the communication port 23 is an interface for connecting the containing cavity 21 and the measuring cavity 22, so that the detector 1 in the containing cavity 21 can perform liquid scintillation measurement on the measuring bottle 10 in the measuring cavity 22 and located at the communication port 23 through the communication port 23.

[0046] One end of the measuring cavity 22 has an opening 221, which means that the end of the measuring cavity 22 has an opening 221 in communication with the outside, so that the measuring bottle 10 in the outside can enter the measuring cavity 22 through the opening 221, and then reach the position in the measuring cavity 22 located at the communication port 23.

[0047] The sealing mechanism 3 can be a mechanism for shielding the communication port 23 and sealing the measuring cavity 22 when the measuring bottle 10 does not enter the measuring cavity 22.

[0048] The light shielding piston 31 can be a piston structure movably connected in the measuring cavity 22 and capable of moving in the measuring cavity 22 along the extension direction of the measuring cavity 22 to shield the communication port 23. The light shielding of the light shielding piston 31 to the communication port 23 can be that, in the state that the measuring bottle 10 does not enter the measuring cavity 22, the light shielding piston 31 keeps shielding the communication port 23, so that the light signal is not easy to affect the detector 1 through the communication port 23. The light shielding of the light shielding piston 31 to the communication port 23 can be that the light shielding piston 31 movably connected in the measuring cavity 22 moves to the communication port 23 to block the communication port 23, so as to shield the communication port 23; or the light shielding piston 31 movably connected in the measuring cavity 22 moves to the position between the communication port 23 and the opening 221 to block the measuring cavity 22, so that the light signal from the opening 221 is blocked and cannot be transmitted from the opening 221 to the communication port 23, thereby shielding the communication port 23.

[0049] The loading mechanism 4 can be used to load the measuring bottle 10 containing the sample to be measured from the opening 221 into the measuring cavity 22 to realize loading, and send the measuring bottle 10 out of the measuring cavity 22 after the liquid scintillation measurement is completed to realize unloading.

[0050] The driving assembly 41 can be a component in the loading mechanism 4 for providing driving power. The cover plate 42 can be a device for blocking the opening 221, and the loading piece 43 can be a component for carrying the measuring bottle 10. The loading piece 43 is movably connected to the cover plate 42, which means that the loading piece 43 can move relative to the cover plate 42 so that the loading piece 43 can independently transport the measuring bottle 10. By connecting the cover plate 42 and the loading piece 43 to the output end of the driving assembly 41, when the driving assembly 41 drives the cover plate 42 alone, the cover plate 42 can drive the loading piece 43 and the measuring bottle 10 carried by the loading piece 43 to move, and make the cover plate 42 block the opening 221, so that the external light signal is not easy to enter the measuring cavity 22 from the opening 221; when the driving assembly 41 drives the loading piece 43 alone, the loading piece 43 can move relative to the cover plate 42, so that after the cover plate 42 blocks the opening 221, the loading piece 43 can extend into the measuring cavity 22 from the opening 221 under the driving of the driving assembly 41 to send the measuring bottle 10 into the measuring cavity 22 from the opening 221.

[0051] Since the light shielding piston 31 is movably connected in the measuring cavity 22, during the process of sending the measuring bottle 10 into the measuring cavity 22 from the opening 221, the measuring bottle 10 can push the light shielding piston 31 away to reach the communicating port 23 (measuring position) so that the detector 1 can perform liquid flash measurement on the sample in the measuring bottle 10. During the process, since the cover plate 42 keeps blocking the opening 221, external light signals are not easy to enter the measuring cavity 22 from the opening 221, which makes the measuring bottle 10 in the state of entering the measuring cavity 22, and light signals are still not easy to affect the detector 1, which avoids the detector 1 having to be at rest due to the influence of light signals.

[0052] In the above structure, in the state that the opening 221 is not blocked by the cover plate 42, the light shielding piston 31 of the sealing mechanism 3 can shield the communicating port 23, which is used to communicate the containing cavity 21 containing the detector 1 with the measuring cavity 22 for containing the measuring bottle 10, so that the detector 1 is not easy to be affected by light signals; during the process of the loading member 43 pushing the measuring bottle 10 to push away the light shielding piston 31 to reach the communicating port 23, the cover plate 42 has kept blocking the opening 221 under the driving of the driving assembly 41, so that external light signals are not easy to enter from the opening 221, and the detector 1 is not easy to be affected by light signals, which makes the detector 1 not easy to be affected by light signals during the whole process of performing liquid flash measurement on the sample in the measuring bottle 10, so that the detector 1 does not need to be at rest during the process of performing liquid flash measurement, so that the sealing type liquid flash continuous measurement device can perform continuous measurement, which is beneficial to improve the measurement efficiency of the sealing type liquid flash continuous measurement device.

[0053] In some embodiments, the sealing mechanism 3 further comprises a counterweight structure 32 connected to the light shielding piston 31, the light shielding piston 31 is sealingly and slidably connected in the measuring cavity 22, the measuring cavity 22 extends in the vertical direction, the opening 221 is located below the communicating port 23, under the action of gravity, the light shielding piston 31 can slide to below the communicating port 23 to shield the communicating port 23.

[0054] The counterweight structure 32 can be a structure connected to the light shielding piston 31, which can exert force on the light shielding piston 31 by its own gravity. The light shielding piston 31 is sealingly and slidably connected in the measuring cavity 22, which means that the light shielding piston 31 located in the measuring cavity 22 is slidably connected to the inner wall surface of the measuring cavity 22, which can slide in the measuring cavity 22 under the action of external force.

[0055] By extending the measuring cavity 22 in the vertical direction, the light shielding piston 31 can slide downward in the measuring cavity 22 under the gravity of the counterweight structure 32. By setting the opening 221 below the communication port 23, the light shielding piston 31 can slide to the position between the communication port 23 and the opening 221 under the gravity of the counterweight structure 32, and block the light signal from the opening 221 to the communication port 23, thereby shielding the light of the communication port 23.

[0056] Exemplarily, the counterweight structure 32 can be made of lead, so that the counterweight structure 32 can provide a larger gravity to enable the piston to slide to the position below the communication port 23 in the measuring cavity 22 under the gravity of the counterweight structure 32.

[0057] In some embodiments, the surface of the light shielding piston 31 facing the opening 221 is provided with a buffer structure 33.

[0058] The buffer structure 33 can be a structure for buffering the impact of the light shielding piston 31. By setting the light shielding piston 31 on the surface of the light shielding piston 31 facing the opening 221, when the measuring bottle 10 is pushed into the measuring cavity 22 and then moves along the measuring cavity 22, the measuring bottle 10 can contact the buffer structure 33 instead of directly pushing the light shielding piston 31, which reduces the possibility of damage to the light shielding piston 31 caused by the impact of the measuring bottle 10, and is beneficial to prolong the service life of the light shielding piston 31, thereby prolonging the service life of the sealed liquid scintillation continuous measurement device.

[0059] Exemplarily, the buffer structure 33 can be an elastic structure, which can absorb the impact of the measuring bottle 10 by elastic deformation. In some embodiments, the buffer structure 33 can be made of rubber material.

[0060] In some embodiments, the sealing mechanism 3 further comprises an elastic member 34, and the light shielding piston 31 is connected to the inner wall surface of the measuring cavity 22 through the elastic member 34. Under the elastic restoring force of the elastic member 34, the light shielding piston 31 can push the measuring bottle 10 to move towards the opening 221.

[0061] The elastic member 34 can be a member capable of elastic deformation. The light shielding piston 31 is connected to the inner wall surface of the measuring cavity 22 through the elastic member 34, which can mean that one end of the elastic member 34 is connected to the light shielding piston 31, and the other end is connected to the inner wall surface of the measuring cavity 22. For Figure 3, the elastic member 34 is compressed and deformed, the light shielding piston 31 moves away from the opening 221, and the measuring bottle 10 is pushed to the communication opening 23, so as to facilitate the measurement by the detector 1; after the liquid scintillation measurement of the sample in the measuring bottle 10 is completed, the loading member 43 is driven by the driving assembly 41 to move towards the opening 221, and the measuring bottle 10 moves towards the opening 221 together with the loading member 43, in the process, the elastic member 34 is elongated, and the elastic member 34 applies a force to the light shielding piston 31 by elastic restoring force, so that the measuring bottle 10 at the communication opening 23 can be subjected to a pushing force from the piston towards the opening 221, and the measuring bottle 10 can smoothly move towards the opening 221, reducing the problems of slow pushing or bottle jamming, and improving the measurement efficiency of the sealed liquid scintillation continuous measurement device.

[0062] Exemplarily, the elastic member 34 can be a spring or an elastic rubber block structure, and a person skilled in the art can select the specific type of the elastic member 34 according to the actual situation, so that the elastic member 34 can apply a force to the light shielding piston 31 by elastic restoring force, so that the measuring bottle 10 can smoothly move towards the opening 221.

[0063] In some embodiments, the sealing mechanism 3 can simultaneously include the counterweight structure 32 and the elastic member 34, the counterweight structure 32 is connected to the light shielding piston 31, one end of the elastic member 34 passes through the counterweight structure 32 and is connected to the light shielding piston 31, and the other end is connected to the inner wall of the measuring cavity 22, so that the counterweight structure 32 and the elastic member 34 can simultaneously apply a force to the light shielding piston 31. After the liquid scintillation measurement of the sample in the measuring bottle 10 is completed, the loading member 43 is driven by the driving assembly 41 to move towards the opening 221, and the measuring bottle 10 moves towards the opening 221 together with the loading member 43, in the process, the elastic member 34 is elongated, and the elastic member 34 applies a force to the light shielding piston 31 by elastic restoring force, and the counterweight structure 32 also applies a force to the light shielding piston 31 by its own gravity, so that the measuring bottle 10 at the communication opening 23 can be subjected to a larger pushing force towards the opening 221, and the measuring bottle 10 can smoothly move towards the opening 221, so that the measuring bottle 10 can move quickly, and the measurement efficiency of the sealed liquid scintillation continuous measurement device is improved.

[0064] In some embodiments, the sealed liquid scintillation continuous measurement device further comprises a guide sleeve 5, the guide sleeve 5 is connected to the shielding main body 2, the inner cavity of the guide sleeve 5 is communicated with the measuring cavity 22, and the radial size of the inner cavity of the guide sleeve 5 gradually decreases along the direction from the opening 221 to the communication opening 23.

[0065] The guide sleeve 5 can be a sleeve member for guiding the measuring bottle 10 during the process of being loaded into the measuring position, which is beneficial for the measuring bottle 10 to smoothly reach the measuring position.

[0066] By connecting the guide sleeve 5 to the shielding body 2, the inner cavity of the guide sleeve 5 can be communicated with the measuring cavity 22, so that the measuring bottle 10 can be moved from the inner cavity of the guide sleeve 5 to the communicating port 23 in the measuring cavity 22.

[0067] The radial dimension of the inner cavity of the guide sleeve 5 gradually decreases in the direction from the opening 221 to the communicating port 23, which means that the radial dimension of the inner cavity of the guide sleeve 5 gradually decreases in the direction close to the communicating port 23, so that the radial dimension of the inner cavity of the guide sleeve 5 is the largest at the end far from the communicating port 23, so that the measuring bottle 10 can smoothly enter the inner cavity of the guide sleeve 5. The gradually decreasing radial dimension of the inner cavity of the guide sleeve 5 makes the inner wall surface of the inner cavity of the guide sleeve 5 not prone to steps, so that the reciprocating movement of the measuring bottle 10 in the inner cavity can be relatively smooth and the bottle is not prone to being stuck.

[0068] In some embodiments, at least part of the guide sleeve 5 is located in the measuring cavity 22, the wall of the guide sleeve 5 located in the measuring cavity 22 protrudes from the inner wall surface of the measuring cavity 22 and includes an end surface 51 facing the light shielding piston 31, the end surface 51 is located between the opening 221 and the communicating port 23, and the light shielding piston 31 can abut against the end surface 51 to achieve light shielding of the communicating port 23.

[0069] At least part of the guide sleeve 5 is located in the measuring cavity 22, which means that the port of the small-diameter section of the inner cavity of the guide sleeve 5 is located in the measuring cavity 22, so that the measuring cavity 22 can be communicated with the inner cavity of the guide sleeve 5 through the port of the small-diameter section of the inner cavity of the guide sleeve 5.

[0070] The wall of the guide sleeve 5 located in the measuring cavity 22 protrudes from the inner wall surface of the measuring cavity 22, which means that the wall of the guide sleeve 5 extending into the measuring cavity 22 from the opening 221 protrudes into the measuring cavity 22 from the inner wall surface of the measuring cavity 22, so that the wall of the guide sleeve 5 extending into the measuring cavity 22 can form a boss structure in the measuring cavity 22, so that the light shielding piston 31 sliding in the measuring cavity 22 towards the opening 221 can abut against the wall of the guide sleeve 5, and the light shielding piston 31 is limited, reducing the possibility of the light shielding piston 31 falling off from the opening 221.

[0071] The wall of the guide sleeve 5 located in the measuring cavity 22 includes an end surface 51 facing the light shielding piston 31, which means that the end surface 51 forms a step surface of the boss structure. By arranging the end surface 51 between the opening 221 and the communicating port 23, when the light shielding piston 31 abuts against the end surface 51, the light shielding piston 31 can block the position between the opening 221 and the communicating port 23, so that the light signal is blocked and is not prone to being transmitted from the opening 221 to the communicating port 23.

[0072] In some embodiments, the driving assembly 41 comprises a first lifting device 411 and a second lifting device 412, the second lifting device 412 is connected to the output end of the first lifting device 411, and the cover plate 42 is connected to the output end of the second lifting device 412. Under the driving of the first lifting device 411, the cover plate 42 can block the opening 221; and under the driving of the second lifting device 412, the loading piece 43 can drive the measuring bottle 10 to move in the measuring cavity 22, so that the measuring bottle 10 pushes away the light-blocking piston 31 to reach the communication port 23.

[0073] The first lifting device 411 and the second lifting device 412 are two devices in the driving assembly 41 that can output driving force outward. By connecting the second lifting device 412 to the output end of the first lifting device 411 and connecting the cover plate 42 to the output end of the second lifting device 412, the first lifting device 411 can drive the second lifting device 412 and the cover plate 42 to move. When the first lifting device 411 is driven alone, the second lifting device 412 and the cover plate 42 can move synchronously, so that the cover plate 42 can move to the opening 221 to block the opening 221. When the second lifting device 412 is driven alone, the loading piece 43 can move relative to the cover plate 42 to drive the measuring bottle 10 to move from the opening 221 to the inside of the measuring cavity 22, so that the measuring bottle 10 can push away the light-blocking piston 31 and reach the communication port 23, so that the detector 1 can perform liquid scintillation measurement on the sample to be measured in the measuring bottle 10.

[0074] It can be understood that when the second lifting device 412 acts alone to reset, the loading piece 43 can move relative to the cover plate 42 to reset, driving the measuring bottle 10 to move from the inside of the measuring cavity 22 to the opening 221, so that the measuring bottle 10 can move from the communication port 23 to the opening 221, and in this process, the elastic restoring force of the elastic member 34 can drive the light-blocking piston 31 to move the measuring bottle 10 in the direction of the opening 221; when the first lifting device 411 acts alone to reset, the second lifting device 412 and the cover plate 42 can move synchronously to reset, so that the cover plate 42 can move away from the opening 221, and the cover plate 42 can drive the loading piece 43 and the measuring bottle 10 to move, achieving the unloading of the measuring bottle 10.

[0075] Exemplarily, the first lifting device 411 and the second lifting device 412 can be linear motors, electric screw rods, or hydraulic rods, so that the first lifting device 411 and the second lifting device 412 can output driving force along the direction of the opening 221.

[0076] In some embodiments, the first lifting device 411 and the second lifting device 412 are arranged in a direction perpendicular to the direction of the opening 221.

[0077] Since the power outputted by the first lifting device 411 and the second lifting device 412 is linear power along the opening 221 direction. By arranging the first lifting device 411 and the second lifting device 412 along the direction perpendicular to the opening 221 direction, the size occupied by the driving assembly 41 in the opening 221 direction can be reduced, which is beneficial to reduce the occupied space of the sealed LSCM device.

[0078] In some embodiments, the first lifting device 411 and the second lifting device 412 are both configured as air cylinders.

[0079] Since air has good compressibility, by configuring the first lifting device 411 as an air cylinder, when the cover plate 42 abuts against the opening 221, the air in the first lifting device 411 can buffer the contact between the cover plate 42 and the shielding body 2, and the compressed air can provide a certain pre-tightening force for the cover plate 42 to seal the opening 221; by configuring the second lifting device 412 as an air cylinder, when the measuring bottle 10 abuts against the light shielding piston 31, the air in the second lifting device 412 can buffer the contact between the measuring bottle 10 and the light shielding piston 31.

[0080] In some embodiments, the cover plate 42 is provided with an insertion hole 421, and the insertion piece 43 is movably connected to the insertion hole 421. The insertion piece 43 can be placed in the insertion hole 421 to form a groove 44 with the cover plate 42 for placing the measuring bottle 10.

[0081] The insertion hole 421 can be a hole-like structure provided in the cover plate 42 for placing the insertion piece 43. For example, the insertion hole 421 can be a blind hole or a stepped hole. The insertion hole 421 is used for placing the insertion piece 43. When the insertion piece 43 is placed in the insertion hole 421, the inner circumferential surface of the insertion hole 421 can form a groove 44 with the insertion piece 43 for placing the measuring bottle 10.

[0082] For example, the insertion hole 421 can be formed by drilling, milling or other mechanical processing to remove materials from the surface of the cover plate 42 facing the opening 221.

[0083] The insertion piece 43 can be placed in the insertion hole 421. For example, the output end of the second lifting device 412 can extend into the insertion hole 421 through the bottom surface of the insertion hole 421 and be connected to the insertion piece 43 in the insertion hole 421. Under the driving of the second lifting device 412, the insertion piece 43 can enter the insertion hole 421 and adhere to the bottom surface of the insertion hole 421. The insertion piece 43 and the cover plate 42 form a groove 44, and the measuring bottle 10 can be located in the groove 44 and connected to the insertion piece 43. When the measuring bottle 10 is placed on the insertion piece 43, the inner wall surface of the groove 44 can support the measuring bottle 10, and the placement of the measuring bottle 10 on the insertion piece 43 is stable.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sealed liquid scintillation continuous measurement device, characterized in that, include: A detector used to perform liquid scintillation measurement on the sample in the measurement bottle; The shielding body is provided with a receiving cavity and a measuring cavity. The receiving cavity is connected to the measuring cavity through a connecting port. The detector is disposed in the receiving cavity. The measuring cavity has an opening at one end and is used to receive the measuring bottle. A sealing mechanism includes a light-shielding piston, which is movably connected to the measuring chamber and is used to shield the communication port from light. A filling mechanism includes a drive assembly, a cover plate, and a loading component. The cover plate and the loading component are both connected to the output end of the drive assembly. The loading component is movably connected to the cover plate and is used to carry the measuring bottle. Driven by the drive assembly, after the cover plate blocks the opening, the insert can drive the measuring bottle to push open the light-blocking piston and reach the communication port.

2. The sealed liquid scintillation continuous measuring device according to claim 1, characterized in that, The sealing mechanism also includes a counterweight structure connected to the light-shielding piston. The light-shielding piston is slidably connected to the measuring cavity, which extends vertically. The opening is located below the communication port. Under the action of gravity, the light-shielding piston can slide to the bottom of the communication port to block the light from the communication port.

3. The sealed liquid scintillation continuous measuring device according to claim 1, characterized in that, The surface of the light-shielding piston facing the opening is provided with a buffer structure.

4. The sealed liquid scintillation continuous measuring device according to claim 1 or 2, characterized in that, The sealing mechanism also includes an elastic element, and the light-shielding piston is connected to the inner wall of the measuring chamber through the elastic element. Under the action of the elastic restoring force of the elastic element, the light-shielding piston can push the measuring bottle to move toward the opening.

5. The sealed liquid scintillation continuous measuring device according to claim 1, characterized in that, The sealed liquid flashover continuous measurement device also includes a guide sleeve, which is connected to the shielding body. The inner cavity of the guide sleeve is connected to the measurement cavity, and the radial dimension of the inner cavity of the guide sleeve gradually decreases along the direction from the opening to the connection port.

6. The sealed liquid scintillation continuous measuring device according to claim 5, characterized in that, At least a portion of the guide sleeve is located in the measuring cavity. The wall of the guide sleeve located in the measuring cavity protrudes from the inner wall surface of the measuring cavity and includes an end face facing the light-shielding piston. The end face is located between the opening and the communication port. The light-shielding piston can abut against the end face to achieve light shielding of the communication port.

7. The sealed liquid scintillation continuous measuring device according to claim 1, characterized in that, The driving assembly includes a first lifting device and a second lifting device. The second lifting device is connected to the output end of the first lifting device, and the cover plate is connected to the output end of the second lifting device. Under the drive of the first lifting device, the cover plate can block the opening. Driven by the second lifting device, the loading component can move the measuring bottle in the measuring cavity so that the measuring bottle pushes aside the light-shielding piston and reaches the communication port.

8. The sealed liquid scintillation continuous measuring device according to claim 7, characterized in that, The first lifting device and the second lifting device are arranged in a direction perpendicular to the opening.

9. The sealed liquid scintillation continuous measuring device according to claim 7, characterized in that, Both the first lifting device and the second lifting device are configured as cylinders.

10. The sealed liquid scintillation continuous measuring device according to claim 1, characterized in that, The cover plate is provided with an insertion hole, and the insertion component is movably connected to the insertion hole. The insertion component can be placed in the insertion hole to form a groove with the cover plate for placing the measuring bottle.

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