A detector container

Abstract

The application discloses a detector container and relates to the technical field of detectors; the detector container comprises an inner container and an outer container, the inner container is fixedly suspended in the outer container, liquid argon inlet pipes and argon gas outlet pipes are connected to the inner container, and the liquid argon inlet pipes and the argon gas outlet pipes are connected with an argon liquefied cold box at the ends; a vacuum outlet of the outer container and a vacuum outlet of the inner container are arranged at the top of the outer container, one end of the vacuum outlet of the outer container and the vacuum outlet of the inner container is connected with a vacuum pumping system through a vacuum pipeline, the other end of the vacuum outlet of the outer container is communicated with the space between the outer container and the inner container, and the other end of the vacuum outlet of the inner container is communicated with the inner part of the inner container; and a detector communicated with the inner container is arranged at the top of the outer container. The detector container has the advantages that the refrigeration time is long, and the refrigeration effect is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detectors, in particular to a detector container. BACKGROUND

[0002] High-performance detectors need a low-temperature environment, only in the low-temperature environment can guarantee the normal function of its electronic devices or system, improve the sensitivity of the electronic devices, shield or reduce the thermal noise from the system itself or the surrounding, so that the signal-to-noise ratio is greatly improved. At present, the known detector refrigeration systems at home and abroad mostly use the refrigeration gas stored in the gas tank to refrigerate the detector, and the detector is placed in the gas tank. The existing detector container has a small gas storage capacity, and the refrigeration effect is general and the refrigeration time is short. SUMMARY

[0003] The purpose of the present application is to provide a detector container to solve the problems existing in the prior art, and to have a long refrigeration time and good refrigeration effect.

[0004] To achieve the above purpose, the present application provides the following scheme:

[0005] The present application provides a detector container, which comprises an inner container and an outer container, the inner container is fixedly suspended in the outer container, the inner container is connected with a liquid argon inlet pipe and an argon gas outlet pipe, the ends of the liquid argon inlet pipe and the argon gas outlet pipe are respectively connected with an argon liquefaction cold box; the top of the outer container is provided with an outer container vacuum suction port and an inner container vacuum suction port, one end of the outer container vacuum suction port and the inner container vacuum suction port is respectively connected with a vacuum pumping system through a vacuum pipeline, the other end of the outer container vacuum suction port is in communication with the space between the outer container and the inner container, and the other end of the inner container vacuum suction port is in communication with the inside of the inner container; the top of the outer container is provided with a detector in communication with the inner container. The inner container is filled with liquid argon to provide a stable high-purity liquid argon environment for the detector, and to provide electrical and low-temperature medium interfaces for detector components such as detector leads, argon liquefaction systems, vacuum systems and monitoring signals. The detector Dewar is divided into an inner container and an outer container, and the two parts are independent structures: the inner layer is a liquid argon cavity, which provides a high-purity liquid argon space for the detector; the outer container maintains the adiabatic relationship between the inner container and the external environment, and provides support and mounting interfaces for the inner container and accessories.

[0006] Optionally, the outer container and the inner container are both can-shaped structures with an open top, the outer container is fixedly and sealedly connected to the outer tank flange on the top, and the inner container is fixedly and sealedly connected to the inner tank flange on the top; a connecting port is sealed on the outer tank flange, and the liquid argon inlet pipe and the argon gas outlet pipe pass through the connecting port and are connected to the inner container via the inner tank flange; the outer container vacuum port and the inner container vacuum port are fixedly provided on the outer tank flange, and one end of the inner container vacuum port passes through the outer container vacuum port and the inner tank flange and is connected to the interior of the inner container.

[0007] Optionally, an ear plate is fixedly provided on the outside of the outer tank flange, and the ear plate is used to be erected on the bracket. The inner container and the outer container are fixedly connected through the outer tank flange and the inner tank flange. A plurality of connecting columns are fixedly provided on the top of the inner tank flange, and the top of the connecting column is threadedly connected to the inner bottom of the outer tank flange.

[0008] Optionally, the outer wall of the inner container is covered with a layer of heat insulating material.

[0009] Optionally, an adsorbent tray is fixedly provided at the bottom of the outer container, and adsorbent is placed in the adsorbent tray; an electrostatic grounding plate is installed on the outer wall below the outer container.

[0010] Optionally, the inner tank flange has two thermometer holes, each of which is sealed with a thermometer. An electric heating tape is wrapped around the outer wall of the inner container. A vacuum electrode mounting flange is provided on the outer tank flange, and wires connecting the top of the thermometer and the electric heating tape are passed through the vacuum electrode mounting flange. To increase the evaporation rate of liquid argon and thereby increase the circulation flow rate of argon during purification, the inner container of the detector dewar needs to be heated. The present invention provides a wrapped electric heating tape around the outer wall of the inner container to accelerate the vaporization rate of the liquid argon in the inner container.

[0011] Optionally, the sealing surface between the inner tank flange and the inner container is sealed with metal, and the outer tank flange and the outer container are fixedly sealed by a sealing ring.

[0012] Optionally, a differential pressure sensor is provided on the outer tank flange, and the differential pressure sensor is connected to the inner container through a pressure-conducting pipe passing through the outer tank flange; the inner container is connected to a bursting membrane through a pressure relief pipe passing through the outer tank flange, and the bursting membrane extends to the outside of the room through the pressure relief pipe.

[0013] Optionally, a plurality of reserved flanges are sealed on the outer tank flange.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] The present invention uses liquid argon placed in the inner container to achieve refrigeration. The liquid argon circulates through pipes with an external refrigeration system, enabling continuous refrigeration, thereby improving the refrigeration time and cooling effect. A thermometer measures the temperature of the liquid argon and is connected to a display on site for easy observation at any time. A differential pressure sensor monitors the pressure in the container. When the safety value is exceeded, the pressure can be released through a bursting membrane, improving safety performance. The interlayer between the inner and outer containers is evacuated, and the outer wall of the inner container is coated with 30 layers of high-vacuum multi-layer insulation material. An adsorbent tray is placed in the interlayer, and the tray holds the adsorbent, thereby reducing heat leakage from the container. The entire container is supported by a lifting bracket connected to the outer container flange. The bottom of the outer container is designed as a flat head to reduce the overall height and place it on the pallet. The bottom of the inner container is designed as a flat head to place the inner container on the pallet during disassembly and assembly, while also reducing the height. When the inner and outer container cylinders are disassembled, a pallet with movable rollers on the bottom is used to assist in movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the detector container of the present invention;

[0018] Figure 2 This is a schematic diagram of the main structure of the detector container of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the detector container from above according to the present invention;

[0020] Figure 4 Schematic diagram of the cross-sectional structure of the detector container of the present invention;

[0021] Figure 5 This is a schematic diagram of the inner tank flange structure of the detector container of the present invention;

[0022] Among them, 1. Inner container; 2. Outer container; 3. Liquid argon inlet pipe; 4. Argon outlet pipe; 5. Vacuum outlet of outer container; 6. Vacuum outlet of inner container; 7. Outer tank flange; 8. Inner tank flange; 9. Connecting port; 10. Reserved flange; 11. Ear plate; 12. Connecting column; 13. Vacuum electrode mounting flange; 14. Thermometer connector; 15. Differential pressure sensor; 16. Pressure lead pipe; 17. Pressure relief pipeline; 18. Bursting membrane; 19. Electrostatic grounding plate; 20. Adsorbent tray. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The object of the present invention is to provide a detector container to solve the problems existing in the above-mentioned prior art, with a long refrigeration time and a good refrigeration effect.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The present invention provides a detector container, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, it includes an inner container 1 and an outer container 2. The inner container 1 is fixedly suspended in the outer container 2. The container is a vertical structure. The inner container 1 has an inner diameter of 550mm and a height of 660mm. The inner container 1 is made of 316L. The outer container 2 has an inner diameter of 800mm and a height of 893mm. It is made of 304 stainless steel. The effective volume range of the inner container 1 is 0.12m 3 ~0.5m 3 The inner container 1 is a positive pressure container with a design pressure of 0.8 MPa; the outer container 2 is a vacuum container. The leakage rate of the inner container 1 is not greater than 1×10 -10 Pa·m 3 / s, the leakage rate of outer container 2 is not greater than 5×10 -7 Pa·m 3 / s, the inner container 1 is connected to a liquid argon inlet pipe 3 and an argon outlet pipe 4, and the ends of the liquid argon inlet pipe 3 and the argon outlet pipe 4 are respectively connected to the argon liquefaction cold box; an outer container vacuum port 5 and an inner container vacuum port 6 are provided on the top of the outer container 2, and one end of the outer container vacuum port 5 and the inner container vacuum port 6 are respectively connected to a vacuum pumping system through a vacuum pipeline, and the other end of the outer container vacuum port 5 is communicated with the space between the outer container 2 and the inner container 1, and the other end of the inner container vacuum port 6 is communicated with the inside of the inner container 1. The container adopts vacuum insulation, and the connection between the vacuum pumping pipeline and the container flange cover adopts a knife-edge flange sealing form; a detector connected to the inner container 1 is installed on the top of the outer container 2; in the detector Dewar, the liquid argon absorbs heat and evaporates into argon gas. After returning to room temperature through the regenerator and the buffer pipeline, it is pressurized by the bellows pump and returned to the argon purification system. After purification, it returns to the argon liquefaction system at room temperature, and the cycle is repeated. After a period of time, the detector's cryogenic system will be filled with liquid argon. When the target mass is reached, the argon replenishment system will be closed and the internal argon liquefaction cycle will be started. When the system is stable and the purity of the liquid argon meets the requirements, the detector will be turned on. While the detector is working, the purifier and liquefier continue to work to ensure that the evaporated argon is purified, liquefied and replenished in time, and the temperature and pressure of the detector's low-temperature Dewar are monitored at the same time. The container system adopts high vacuum multi-layer insulation technology. In order to reduce convective heat loss and reduce the infiltration of external gas molecules, it is necessary to maintain a high vacuum degree in the inner and outer layers. After installing the detector Dewar and related components according to the design requirements, connect the vacuum pump to the Dewar vacuum port, turn on the first-stage vortex pump to evacuate the Dewar vacuum insulation layer until the vacuum gauge reading is <100Pa. Then turn on the second-stage molecular pump to continue evacuating the Dewar insulation layer until the vacuum gauge reading reaches 10 -4 During system startup, to ensure the purity of the argon in the system, the vacuum system must be turned on to evacuate the air in the system to a vacuum state, then fill it with argon, and then evacuate the system again. This process is repeated several times to replace the air in the system with higher-purity argon.

[0027] Specifically, the outer container 2 and the inner container 1 are both can-shaped structures with an open top. The top of the outer container 2 is fixedly and sealedly connected to the outer tank flange 7, and the top of the inner container 1 is fixedly and sealedly connected to the inner tank flange 8; a connecting port 9 is sealed on the outer tank flange 7, and the liquid argon inlet pipe 3 and the argon outlet pipe 4 pass through the connecting port 9 and are connected to the inner container 1 via the inner tank flange 8; the outer container vacuum port 5 and the inner container vacuum port 6 are fixedly provided on the outer tank flange 7, and one end of the inner container vacuum port 6 passes through the outer container vacuum port 5 and the inner tank flange 8 and is connected to the interior of the inner container 1; the container is made of 316L stainless steel, and the end pipes of the container flange openings are all made of seamless stainless steel pipes, and the technical requirements of the steel should comply with the corresponding national standards. The inner surface of the container and its accessories (including the flange short cylinders) should be polished to a surface roughness of Ra = 0.8. After installation, the inner surface of the container should be thoroughly cleaned and degreased to meet vacuum cleaning requirements, and the outer surface of the container should be polished. The inner container (including the inner flange) must meet or not fall below the following process requirements: electrolytic polishing (EP) polishing, surface roughness 3.4μm; Alconox aqueous solution ultrasonic cleaning, post-rinsing; citric acid aqueous solution to remove metal oxides, post-rinsing; 5% citric acid 60% aqueous solution stainless steel passivation treatment, post-rinsing; high-purity compressed nitrogen pre-drying + drying in a drying oven; after the container is processed, it should be heated and degassed. Container installation; the container's load-bearing surface is the upper surface of the outer flange, which can support the container and has a horizontal leveling function. The bottom of the outer container is designed with a movable support structure and a lifting structure to facilitate the installation of the inner and outer containers and flanges, making it beautiful and elegant. All pipeline welds must undergo 100% flaw detection inspection and an inspection report must be issued. Defective locations must be repaired immediately and records must be made. The container itself and the base must be independently grounded; sufficient interface signal interfaces must be reserved on the flange surface.

[0028] The outer tank flange 7 is sealed with multiple reserved flanges 10. A lug plate 11 is fixedly attached to the outer side of the outer tank flange 7 and is used to mount on a bracket. The inner container 1 and outer container 2 are fixedly connected via the outer tank flange 7 and the inner tank flange 8. Multiple connecting posts 12 are fixedly attached to the top of the inner tank flange 8. The top of the connecting posts 12 is threadedly connected to the inner bottom of the outer tank flange 7. The connecting posts 12 are four 10mm diameter stainless steel posts, bolted and welded to the inner and outer flange covers at both ends. Non-metallic insulation gaskets are placed between the stainless steel posts to reduce heat leakage from the tank. To reduce heat leakage from the inner container, the interlayer between the inner and outer containers is evacuated, and the outer wall of the inner container is coated with 30 layers of high-vacuum multi-layer insulation material. An adsorbent tray 20 containing adsorbent is placed in the interlayer. An electrostatic grounding plate 19 is installed on the outer wall below the outer container.

[0029] Two thermometer holes are formed on the inner tank flange 8, and a thermometer is sealingly installed in the thermometer hole. An electric heating belt is wound on the outer wall of the inner container. A vacuum electrode installation flange 13 is arranged on the outer tank flange. A thermometer joint 14 at the top of the thermometer and the wire of the electric heating belt are arranged on the vacuum electrode installation flange 13. The sealing surface between the inner tank flange 8 and the inner container 1 is sealed by metal. The inner tank flange 8 is provided with a sealing groove with a radius of 2 mm, so that the indium wire sealing can be used. The outer tank flange 7 and the outer container 2 are fixedly sealed by a sealing ring, and the sealing ring can be made of fluorine rubber. The outer tank flange 7 is provided with a differential pressure sensor 15, and the differential pressure sensor 15 communicates with the inner container 1 through a pressure lead pipe 16 arranged on the outer tank flange 7. The inner container 1 is connected with a burst membrane 18 through a pressure relief pipe 17 arranged on the outer tank flange 7, and the burst membrane 18 extends to the outdoor through the pressure relief pipe 17.

[0030] In the description of the present application, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for description purposes and cannot be understood as indicating or implying relative importance.

[0031] In the present application, specific examples are applied to illustrate the principles and implementation modes of the present application. The above examples are only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the present application should not be understood as a limitation of the present application.

Claims

1. A detector container, characterized in that: The evaporator is connected to the evaporator through a pipe which is fixed to the evaporator and the evaporator is connected to the evaporator.

2. The detector container according to claim 1, characterized in that: The outer container and the inner container are both can-shaped structures with an open top, the outer container is fixedly and sealedly connected to the outer tank flange on the top, and the inner container is fixedly and sealedly connected to the inner tank flange on the top; a connecting port is sealed on the outer tank flange, and the liquid argon inlet pipe and the argon gas outlet pipe pass through the connecting port and are connected to the inner container via the inner tank flange; the outer container vacuum port and the inner container vacuum port are fixedly provided on the outer tank flange, and one end of the inner container vacuum port passes through the outer container vacuum port and the inner tank flange and is connected to the interior of the inner container.

3. The detector container according to claim 2, characterized in that: An ear plate is fixedly provided on the outside of the outer tank flange, and the ear plate is used to be erected on the bracket. The inner container and the outer container are fixedly connected through the outer tank flange and the inner tank flange. A plurality of connecting columns are fixedly provided on the top of the inner tank flange, and the top of the connecting column is threadedly connected to the inner bottom of the outer tank flange.

4. The detector container according to claim 1, characterized in that: The outer wall of the inner container is covered with a heat insulating material layer.

5. The detector container according to claim 1, characterized in that: An adsorbent tray is fixedly arranged at the bottom of the outer container, and adsorbent is placed in the adsorbent tray; an electrostatic grounding plate is installed on the outer wall below the outer container.

6. The detector container according to claim 2, characterized in that: Two thermometer holes are provided on the inner tank flange, thermometers are sealed in the thermometer holes, an electric heating tape is wrapped around the outer wall of the inner container, a vacuum electrode mounting flange is provided on the outer tank flange, and the wires of the thermometer top and the electric heating tape are passed through the vacuum electrode mounting flange.

7. The detector container according to claim 2, characterized in that: The sealing surface between the inner tank flange and the inner container is sealed with metal, and the outer tank flange and the outer container are fixedly sealed by a sealing ring.

8. The detector container according to claim 2, characterized in that: A differential pressure sensor is provided on the outer tank flange, and the differential pressure sensor is connected to the inner container through a pressure-guiding pipe passing through the outer tank flange; the inner container is connected to a bursting disk through a pressure relief pipe passing through the outer tank flange, and the bursting disk extends to the outside of the room through the pressure relief pipe.

9. The detector container according to claim 2, characterized in that: A plurality of reserved flanges are sealed on the outer tank flange.

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