Automatic liquid nitrogen supplementing device based on high-purity germanium detector

Abstract

The invention discloses an automatic liquid nitrogen supplementing device based on a high-purity germanium detector, and relates to the field of automatic liquid nitrogen supplementing devices. The nitrogen supplementing device comprises a nitrogen supplementing tank and a turnover tank, the nitrogen supplementing tank comprises a first tank body, the turnover tank comprises a second tank body, the nitrogen supplementing device is provided with mounting seats, the three mounting seats which are arranged in an annular array at equal intervals are arranged on the outer sides of the first tank body and the second tank body, and fixing plates are fixed to the bottoms of the mounting seats; therefore, stable support is provided for the tank body, an interface is provided for subsequent installation of the weighing sensor, meanwhile, the arrangement of the first screw holes means that the installation mechanism can be connected with the fixing plates of the nitrogen supplementing tank and the turnover tank at multiple positions, and therefore the installation mechanism can be connected with the nitrogen supplementing tank and the turnover tank at multiple positions according to actual needs. The problem that the measurement accuracy and stability are affected by pressure change caused by gravity center shift, damp or short circuit and liquid nitrogen evaporation of a weighing sensor in an automatic liquid nitrogen supplementing device of a high-purity germanium detector is solved.

Description

Technical Field

[0001] The invention relates to the field of liquid nitrogen automatic replenishing devices, in particular to a liquid nitrogen automatic replenishing device based on a high-purity germanium detector. Background Art

[0002] A liquid nitrogen automatic replenishment device based on a high-purity germanium detector is a device specially designed to automatically monitor and replenish the liquid nitrogen content in a high-purity germanium detector. The device is mainly composed of a detector liquid nitrogen tank, a weighing sensor, a liquid nitrogen solenoid valve, a liquid nitrogen transmission pipe, a liquid nitrogen turnover tank, a pressure sensor, an electronic charging pump and other key components. The detector liquid nitrogen tank is used to store liquid nitrogen and provide the necessary cooling medium for the high-purity germanium detector. The weighing sensor at the bottom can monitor the weight of the liquid nitrogen in the tank in real time, thereby judging the liquid nitrogen content. In addition, there are first and second weighing sensors, which respectively monitor the liquid nitrogen tank and the liquid nitrogen turnover tank of the detector. The liquid nitrogen content in the transfer tank and output corresponding signals when the liquid nitrogen is insufficient. The liquid nitrogen solenoid valve controls the flow of liquid nitrogen according to these signals. When the liquid nitrogen in the detector liquid nitrogen tank is insufficient, the solenoid valve opens to allow liquid nitrogen to flow in from the turnover tank through the liquid nitrogen transmission pipe. The liquid nitrogen turnover tank is used as a storage container to transport liquid nitrogen to the detector liquid nitrogen tank through the solenoid valve and the transmission pipe, and is also equipped with a weighing sensor to monitor the liquid nitrogen content. Finally, the pressure sensor and the electronic charging pump are responsible for monitoring and controlling the pressure inside the liquid nitrogen turnover tank. When the pressure is insufficient, the electronic charging pump will start and fill in an appropriate amount of gas to ensure that the liquid nitrogen can be discharged smoothly.

[0003] However, the automatic liquid nitrogen replenishment device of the high-purity germanium detector needs to rely on weighing sensors for detection. However, the current weighing sensors are mainly installed at the bottom of the nitrogen replenishment tank and the turnover tank. During use, due to the heavy weight of the nitrogen replenishment tank and the turnover tank, when placed on the weighing sensor, it may cause the center of gravity of the sensor to shift. If the center of gravity shift exceeds the measurement range or stability range of the sensor, it may cause the sensor to measure inaccurately or be damaged. Moreover, the condensed water generated by the liquid nitrogen bottle during use may drip onto the weighing sensor, causing the sensor to become damp or short-circuited. In addition, the evaporation of liquid nitrogen may cause the internal pressure of the liquid nitrogen bottle to change, thereby affecting the stability of the sensor. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide an automatic liquid nitrogen replenishing device based on a high-purity germanium detector to solve the technical problem that the weighing sensor is affected by the pressure changes caused by the center of gravity offset, moisture or short circuit and liquid nitrogen evaporation, which affects the measurement accuracy and stability.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a liquid nitrogen automatic replenishing device based on a high-purity germanium detector, comprising a nitrogen replenishing tank and a turnover tank, wherein the nitrogen replenishing tank comprises a first tank body, and the turnover tank comprises a second tank body, and the outer sides of the first tank body and the second tank body are provided with three mounting seats arranged equidistantly in a circular array, and a fixing plate is provided at the bottom of the mounting seat, and a mounting mechanism is provided below the outer side of the first tank body, and the mounting mechanism comprises a mounting ring, and the top of the mounting ring is equidistantly arranged in a circular array and has first screw holes, wherein the tops of the three first screw holes are respectively provided with nitrogen replenishing mechanisms, and the three nitrogen replenishing mechanisms comprise straps, and the straps are abutted against the mounting ring;

[0006] Two second screw holes are arranged on the top of the strap, and the two second screw holes are opposite to the first screw holes. A weighing sensor is arranged on the top of the strap, and an alignment plate is arranged on the top of the weighing sensor. The alignment plate is fixedly connected to the fixing plate by installing bolts.

[0007] By adopting the above technical solution, the device can be installed stably, and the weight of liquid nitrogen in the nitrogen replenishment tank can be monitored in real time through the weighing sensor, providing a basis for automatic replenishment of liquid nitrogen.

[0008] Furthermore, three supporting legs are arranged at the bottom of the mounting ring, the mounting screw holes of the three supporting legs are positioned opposite to the first screw hole, and bolts are screwed into the mounting screw holes and the first screw holes.

[0009] By adopting the above technical solution, the design of the supporting legs enables the device to better adapt to different installation environments, while providing additional supporting points to ensure the stability of the device during operation.

[0010] Furthermore, a turnover tank is provided on one side of the nitrogen replenishing tank, and the turnover tank includes a second tank body, a docking port is provided on one side of the top of the second tank body, and a pipe mouth is provided on the top of the first tank body, and one side of the pipe mouth is connected to the docking port through a nitrogen delivery pipe.

[0011] By adopting the above technical solution, liquid nitrogen can flow from the turnover tank to the nitrogen replenishment tank when needed, thereby realizing the automatic replenishment function of liquid nitrogen.

[0012] Furthermore, a pressure sensor is provided on the top of the docking port.

[0013] By adopting the above technical solution, it is helpful to control the flow rate of liquid nitrogen and prevent problems such as liquid nitrogen leakage or insufficient replenishment caused by excessively high or low pressure.

[0014] Furthermore, an electronic charging pump is disposed above one side of the second tank body, and the electronic charging pump is connected to the second tank body through an exhaust pipe.

[0015] By adopting the above technical solution, the pressure in the turnover tank can be automatically adjusted according to needs, thereby controlling the flow of liquid nitrogen and improving the automation degree of the device.

[0016] Furthermore, the top of the first tank body is arranged in a conical structure, and the second tank body is arranged in an arc-shaped structure.

[0017] By adopting the above technical solution, the top of the first tank body is set in a conical structure, which is conducive to the collection and discharge of liquid nitrogen; the second tank body is set in an arc structure, which may help reduce the evaporation of liquid nitrogen and improve the structural strength of the tank body. These designs take into account the physical properties of liquid nitrogen and the actual use requirements of the device.

[0018] Furthermore, an insulating sleeve is provided on the outer surface of the nitrogen delivery pipe, and the material of the insulating sleeve is phenolic foam.

[0019] By adopting the above technical solution, the heat loss of liquid nitrogen during transportation is effectively reduced, the low temperature state of liquid nitrogen is maintained, and the utilization efficiency of liquid nitrogen is improved. At the same time, the isolation sleeve also plays a role in protecting the nitrogen transmission pipe and extending its service life.

[0020] In summary, the present invention mainly has the following beneficial effects:

[0021] 1. The present invention is provided with a mounting seat, a fixing plate, a mounting mechanism, a mounting ring, a first screw hole, a nitrogen replenishing mechanism, a strap, a second screw hole, a weighing sensor, and an alignment plate. Three mounting seats equidistantly arranged in a circular array are provided on the outside of the first tank body and the second tank body, and a fixing plate is fixed to the bottom of the mounting seat, thereby providing a stable support for the tank body and an interface for the subsequent installation of the weighing sensor. At the same time, the provision of multiple first screw holes means that the mounting mechanism can be connected to the fixing plates of the nitrogen replenishing tank and the turnover tank at multiple positions. Therefore, according to actual needs, the most suitable screw hole position is selected to install and fix the tank body, so as to easily adjust the direction of the tank body. Subsequently, a fixing plate is provided under the mounting seat and fixedly connected to the weighing sensor through the alignment plate and the mounting bolts. , ensuring the stable placement of the tank on the weighing sensor, effectively avoiding the problem of inaccurate measurement or sensor damage caused by the center of gravity offset, and the weighing sensor is installed on the board, a certain distance from the bottom of the tank, so that even if the liquid nitrogen bottle produces condensed water during use, it will not drip directly onto the weighing sensor, thereby avoiding the risk of the sensor being damp or short-circuited. In addition, since the installation position of the weighing sensor is relatively independent of the bottom of the tank, the pressure change inside the tank caused by the evaporation of liquid nitrogen has little effect on the stability of the sensor, ensuring the accuracy of the measurement. Therefore, this setting solves the problem that the weighing sensor in the liquid nitrogen automatic replenishment device of the high-purity germanium detector is affected by the center of gravity offset, dampness or short circuit and the pressure change caused by the evaporation of liquid nitrogen, which affects the measurement accuracy and stability;

[0022] 2. The present invention provides an insulating sleeve, which has thermal insulation properties and can effectively reduce the heat loss of liquid nitrogen during transportation, thereby ensuring the temperature stability of liquid nitrogen during transportation from the nitrogen replenishment tank to the turnover tank, and improving the utilization efficiency of liquid nitrogen. At the same time, due to the large temperature difference between the inside and outside of the nitrogen transmission pipe, condensed water is easily formed on the outer surface of the pipe, and the presence of the insulating sleeve effectively isolates the direct contact between external moisture and the nitrogen transmission pipe, reducing the formation of condensed water. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a side view stereoscopic structural schematic diagram of the present invention;

[0025] Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 4 For the present invention Figure 2 Schematic diagram of the enlarged structure at point B.

[0027] In the figure: 1. nitrogen replenishing tank; 101. first tank body; 102. pipe mouth; 103. mounting seat; 104. fixing plate; 105. mounting bolt; 2. mounting mechanism; 201. mounting ring; 202. first screw hole; 203. supporting leg; 204. fixing bolt; 3. nitrogen delivery pipe; 4. nitrogen replenishing mechanism; 401. strapping plate; 402. second screw hole; 403. weighing sensor; 404. alignment plate; 5. isolation sleeve; 6. turnover tank; 601. second tank body; 602. docking port; 603. pressure sensor; 604. electronic charging pump. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] An automatic liquid nitrogen replenishment device based on high purity germanium detector, such as Figure 1-Figure 4As shown, it includes a nitrogen replenishing tank 1 and a turnover tank 6, the nitrogen replenishing tank 1 includes a first tank body 101, the turnover tank 6 includes a second tank body 601, the outer sides of the first tank body 101 and the second tank body 601 are provided with three mounting seats 103 arranged equidistantly in a circular array, a fixing plate 104 is arranged at the bottom of the mounting seat 103, and a mounting mechanism 2 is arranged below the outer side of the first tank body 101, the mounting mechanism 2 includes a mounting ring 201, and the top of the mounting ring 201 is equidistantly arranged in a circular array and has first screw holes 202, wherein the tops of the three first screw holes 202 are respectively provided with nitrogen replenishing mechanisms 4, and the three nitrogen replenishing mechanisms 4 include a strap 401, and the strap 401 is abutted against the mounting ring 201; the top of the strap 401 is provided with two The second screw holes 402 are arranged opposite to the first screw holes 202. A weighing sensor 403 is arranged on the top of the strap 401. An alignment plate 404 is arranged on the top of the weighing sensor 403. The alignment plate 404 is fixedly connected to the fixing plate 104 by mounting bolts 105. The structure realizes the automatic replenishment function of liquid nitrogen through the combined design of the nitrogen replenishing tank 1 and the turnover tank 6. The ingenious arrangement of the mounting mechanism 2 and the nitrogen replenishing mechanism 4, especially the integration of the weighing sensor 403, enables the device to monitor the weight of the liquid nitrogen in the nitrogen replenishing tank 1 in real time, and provides data support for the precise control of the liquid nitrogen replenishment. At the same time, the fixed connection realized by the mounting bolts 105 ensures the stability and reliability of the device.

[0030] See also Figure 1 , Figure 2 Three supporting legs 203 are arranged at the bottom of the mounting ring 201. The mounting screw holes of the three supporting legs 203 are aligned with the first screw holes 202, and bolts are screwed in the mounting screw holes and the first screw holes 202. The design of the supporting legs 203 not only enhances the supporting capacity of the mounting ring 201, but also provides additional stability and adjustability through the screw connection with the first screw holes 202. This design enables the device to remain level under different ground conditions, ensuring the measurement accuracy of the weighing sensor 403, and also facilitates the installation and debugging of the device.

[0031] See also Figure 1 , Figure 2 A turnover tank 6 is arranged on one side of the nitrogen replenishing tank 1, and the turnover tank 6 includes a second tank body 601, and a docking port 602 is arranged on one side of the top of the second tank body 601. A pipe mouth 102 is arranged on the top of the first tank body 101, and one side of the pipe mouth 102 is connected to the docking port 602 through the nitrogen delivery pipe 3. The juxtaposition design of the nitrogen replenishing tank 1 and the turnover tank 6, and the connection achieved through the nitrogen delivery pipe 3, enable liquid nitrogen to flow freely between the two tank bodies. This design improves the utilization efficiency of liquid nitrogen, reduces the waste of liquid nitrogen, and also facilitates the maintenance and operation of the device.

[0032] See also Figure 1 , Figure 2 , Figure 4 A pressure sensor 603 is provided at the top of the docking port 602. The setting of the pressure sensor 603 enables the device to monitor the pressure changes in the turnover tank 6 in real time, which can not only prevent the leakage of liquid nitrogen caused by excessive pressure, but also adjust the working state of the electronic charging pump 604 according to the pressure change, thereby realizing the precise replenishment and control of liquid nitrogen.

[0033] See also Figure 1 , Figure 4 An electronic charging pump 604 is arranged above one side of the second tank body 601, and the electronic charging pump 604 is connected to the second tank body 601 through an exhaust pipe. The integrated design of the electronic charging pump 604 enables the device to automatically adjust the pressure in the turnover tank 6 as needed. This design improves the degree of automation of the device, reduces manual intervention, and also improves the accuracy and efficiency of liquid nitrogen replenishment.

[0034] See also Figure 1 , Figure 2 The top of the first tank body 101 is arranged in a conical structure, and the second tank body 601 is arranged in an arc-shaped structure. The conical structure of the first tank body 101 and the arc-shaped structure of the second tank body 601 are not only beautiful, but also conform to the physical properties of liquid nitrogen. The conical structure is conducive to the collection and discharge of liquid nitrogen, while the arc-shaped structure reduces the evaporation area of ​​liquid nitrogen and improves the utilization efficiency of liquid nitrogen. This design takes into account both practicality and aesthetics.

[0035] See also Figure 1 , Figure 4 The outer surface of the nitrogen delivery pipe 3 is provided with an insulating sleeve 5, and the material of the insulating sleeve 5 is phenolic foam. The design of the insulating sleeve 5 on the outer surface of the nitrogen delivery pipe 3 effectively reduces the heat loss of liquid nitrogen during the transportation process. Phenolic foam, as an insulating material, has good thermal insulation performance and low-temperature resistance, and can ensure that the liquid nitrogen remains in a low-temperature state during the transportation process. This design improves the utilization efficiency of liquid nitrogen and also extends the service life of the nitrogen delivery pipe 3.

[0036] The implementation principle of this embodiment is as follows: first, the nitrogen replenishing tank 1 and the turnover tank 6 are installed through the installation mechanism 2, the alignment plate 404 is fixedly connected to the fixing plate 104 using the installation bolts 105, one end of the nitrogen delivery pipe 3 is connected to the pipe mouth 102 of the nitrogen replenishing tank 1, and the other end is connected to the docking port 602 of the turnover tank 6, and the minimum liquid level threshold and the maximum liquid level threshold of the liquid nitrogen are set through the control system;

[0037] During use, the weighing sensor 403 monitors the weight of the liquid nitrogen in the nitrogen replenishment tank 1 in real time, and transmits the data to the control system. The control system determines whether liquid replenishment is needed according to the preset minimum liquid level threshold. When the weight of the liquid nitrogen in the nitrogen replenishment tank 1 is lower than the minimum liquid level threshold, the control system issues a liquid replenishment instruction, and the electronic charging pump 604 starts to pressurize the turnover tank 6, so that the liquid nitrogen flows into the nitrogen replenishment tank 1 through the nitrogen delivery pipe 3 under pressure. During the liquid replenishment process, the pressure sensor 603 monitors the pressure in the turnover tank 6 in real time to ensure that the liquid replenishment process proceeds smoothly. When the weight of the liquid nitrogen in the nitrogen replenishment tank 1 reaches the maximum liquid level threshold, the control system issues a stop liquid replenishment instruction, the electronic charging pump 604 stops working, and the liquid replenishment process ends.

[0038] Although an embodiment of the present invention has been shown and described, this specific embodiment is only an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A liquid nitrogen automatic replenishment device based on a high purity germanium detector, characterized in that: The invention comprises a nitrogen replenishing tank (1) and a turnover tank (6), wherein the nitrogen replenishing tank (1) comprises a first tank body (101), and the turnover tank (6) comprises a second tank body (601), and the outer sides of the first tank body (101) and the second tank body (601) are provided with three mounting seats (103) arranged equidistantly in a circular array, and the bottom of the mounting seats (103) is provided with a fixing plate (104), and the lower side of the outer side of the first tank body (101) is provided with a mounting mechanism (2), and the mounting mechanism (2) comprises a mounting ring (201), and the top of the mounting ring (201) is provided with first screw holes (202) arranged equidistantly in a circular array, wherein the tops of the three first screw holes (202) are respectively provided with nitrogen replenishing mechanisms (4), and the three nitrogen replenishing mechanisms (4) comprise a strap (401), and the strap (401) is in contact with the mounting ring (201); Two second screw holes (402) are arranged on the top of the strap (401), and the two second screw holes (402) are positioned relative to the first screw hole (202). A weighing sensor (403) is arranged on the top of the strap (401), and an alignment plate (404) is arranged on the top of the weighing sensor (403). The alignment plate (404) is fixedly connected to the fixing plate (104) by means of mounting bolts (105).

2. The automatic liquid nitrogen replenishment device based on high purity germanium detector according to claim 1 is characterized in that: Three supporting legs (203) are arranged at the bottom of the mounting ring (201), the mounting screw holes of the three supporting legs (203) are positioned opposite to the first screw hole (202), and bolts are screwed into the mounting screw holes and the first screw holes (202).

3. The automatic liquid nitrogen replenishment device based on high purity germanium detector according to claim 1 is characterized in that: A turnover tank (6) is arranged on one side of the nitrogen replenishing tank (1), and the turnover tank (6) comprises a second tank body (601), a docking port (602) is arranged on one side of the top of the second tank body (601), and a pipe opening (102) is arranged on the top of the first tank body (101), and one side of the pipe opening (102) is connected to the docking port (602) through a nitrogen delivery pipe (3).

4. The automatic liquid nitrogen replenishment device based on high purity germanium detector according to claim 3 is characterized in that: A pressure sensor (603) is provided on the top of the docking port (602).

5. The automatic liquid nitrogen replenishment device based on high purity germanium detector according to claim 1 is characterized in that: An electronic charging pump (604) is disposed above one side of the second tank body (601), and the electronic charging pump (604) is connected to the second tank body (601) via an exhaust pipe.

6. The automatic liquid nitrogen replenishment device based on high purity germanium detector according to claim 1 is characterized in that: The top of the first tank body (101) is arranged in a conical structure, and the second tank body (601) is arranged in an arc-shaped structure.

7. The automatic liquid nitrogen replenishment device based on high purity germanium detector according to claim 3 is characterized in that: The outer surface of the nitrogen delivery pipe (3) is provided with an insulating sleeve (5), and the material of the insulating sleeve (5) is phenolic foam.

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