A disturbance mechanism and a water triple point reproduction device

Abstract

This application provides a disturbance mechanism for a water triple point reproduction device. The reproduction device includes a drawer, a pure water container, and a temperature control system. The pure water container is located at the bottom of the drawer, and the temperature control system measures and controls the temperature of the pure water. The disturbance mechanism includes a driver, a short connecting rod, a long connecting rod, and a cold plate. The driver is located at the bottom of the drawer and is rotatably connected to the short connecting rod, driving the short connecting rod to rotate on the bottom surface of the drawer. The short connecting rod is rotatably connected to the long connecting rod, and the long connecting rod is rotatably connected to the cold plate. A slide is provided at the bottom of the drawer, and the cold plate is located within the slide and is driven to reciprocate through the disturbance mechanism. The pure water container is located on the cold plate, and the pure water is disturbed by the reciprocating motion of the cold plate. The disturbance mechanism and the water triple point reproduction device provided in this application adopt an indirect disturbance method, without direct contact with the water. The reciprocating motion of the disturbance mechanism drives the reciprocating movement of the container, ultimately achieving non-contact disturbance of the pure water inside the container, thus improving the accuracy of the experiment.

Description

Technical Field

[0001] This application relates to the field of water triple point reproduction technology under microgravity conditions, and more specifically, to a disturbance mechanism and a water triple point reproduction device. Background Technology

[0002] The triple point of water is the temperature at which water exists in equilibrium in its solid, liquid, and vapor phases. Its value is 273.16 K (0.01 °C), and it can be reproduced within a sealed triple point bottle containing high-purity water. The triple point bottle is the fixed point device used by various levels of metrology verification institutions to calibrate the zero point of standard platinum resistance thermometers and standard mercury thermometers. Therefore, the accurate reproduction and measurement of the triple point of water has significant practical importance.

[0003] Chinese patent CN113804331, concerning a thermal insulation casing, discloses a multifunctional thermostatic bath and temperature control method for automatic reproduction of the triple point of water. The multifunctional thermostatic bath includes a bath body containing liquid. A partition is located in the middle of the bath body, with a main working chamber and an auxiliary working chamber on either side of the partition. Medium flow channels are located at the upper and lower ends of the partition. A heater is located in the auxiliary working chamber, with a cooling coil above the heater. A stirring shaft is also located in the auxiliary working chamber, with a stirring paddle at the bottom and a stirring motor connected to the upper end. The stirring motor circulates the liquid in the thermostatic bath using both clockwise rotation and up-and-down tumbling cycles, ensuring stable and uniform temperature within the main working chamber of the thermostatic bath. This method is used for the calibration of thermometers.

[0004] The aforementioned multifunctional thermostatic bath uses a stirring shaft and a stirring paddle to stir the liquid inside the bath, thereby ensuring a consistent liquid temperature. However, using a stirring shaft and a stirring paddle increases the overall complexity of the equipment. Furthermore, the stirring shaft and the stirring paddle have different specific heat capacities than the liquid. When heating the liquid, the stirring shaft and the stirring paddle will dissipate heat, which may affect the three-phase change point of the liquid (water) and thus affect the accuracy of the experiment. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a disturbance mechanism and a water triple point reproduction device to solve the technical problem that the existing constant temperature bath has a stirring device that diverts some heat, affecting the accuracy of the experiment.

[0006] In a first aspect, embodiments of this application provide a disturbance mechanism for a water triple point reproduction device. The reproduction device further includes a drawer, a pure water container for holding pure water, and a temperature measurement and control system. The pure water container is disposed at the bottom of the drawer, and a heat insulation sleeve assembly is disposed on the outer side wall of the pure water container. The temperature measurement and control system is used to measure and control the temperature of the pure water in the pure water container. The disturbance mechanism includes a driver, a short connecting rod, a long connecting rod, and a cold plate. The driver is disposed at the bottom of the drawer, and the driver is rotatably connected to one end of the short connecting rod and drives the short connecting rod to rotate around a set axis on the bottom surface of the drawer. The other end of the short connecting rod is rotatably connected to one end of the long connecting rod, and the other end of the long connecting rod is rotatably connected to the cold plate. A slide is disposed at the bottom of the drawer, and the cold plate is located in the slide and is driven to reciprocate through the disturbance mechanism. The pure water container is disposed on the cold plate, and the pure water in the pure water container is disturbed by the reciprocating motion of the cold plate.

[0007] In a possible implementation, the drawer is further provided with a limit structure and a limit switch, the limit structure being connected to the limit switch; the limit switch is configured such that when the cold plate is stationary in the initial position, the limit structure is connected to the cold plate; and before the disturbance mechanism drives the cold plate to slide back and forth along the slide, the limit structure is disconnected from the cold plate.

[0008] In a possible implementation, the limiting structure is a shape memory alloy puller, which is disposed on the side wall of the drawer. The puller includes a connector made of shape memory alloy wire, and a slot with a matching shape and size of the connector is provided on the cold plate. When the limit switch is turned off and de-energized, the connector of the shape memory alloy puller is inserted into the slot. When the limit switch is turned on and energized, the connector retracts from the slot.

[0009] In a possible implementation, the end of the cold plate facing the long connecting rod is provided with an ear plate, and the ear plate and the corresponding end of the long connecting rod are respectively provided with a connecting hole, and the two connecting holes are respectively connected by a connecting shaft.

[0010] In a possible implementation, each slide is provided with two slide rails, which are arranged parallel to each other at the bottom of the drawer and the distance between them matches the width of the cold plate. The cold plate is located between the two slide rails, and both sides of the cold plate are slidably connected to the two slide rails respectively.

[0011] In a possible implementation, the drive includes a motor and a speed reducer, the motor being drivenly connected to the speed reducer, the output shaft axis of the speed reducer being vertically disposed at the bottom of the drawer, and the end of the short connecting rod near the speed reducer being connected to the output shaft.

[0012] In a possible implementation, the reproduction device further includes a thermoelectric cooler, and the disturbance mechanism further includes a heat insulation sleeve assembly and a thermoelectric cooler. The heat insulation sleeve assembly includes a heat insulation sleeve housing, the pure water container is disposed inside the heat insulation sleeve housing, and the heat-absorbing surface of the thermoelectric cooler is disposed on the heat insulation sleeve assembly. The cold plate is connected to a heat pipe, and the heat-releasing surface of the thermoelectric cooler is connected to the heat pipe.

[0013] In a possible implementation, the temperature measurement and control system includes a controller connected to the thermoelectric cooler, the controller being configured to control the magnitude of the current input to the thermoelectric cooler based on the real-time temperature of the purified water inside the purified water container.

[0014] In a first aspect, embodiments of this application provide a water triple point reproduction device, including the aforementioned disturbance mechanism.

[0015] In a possible implementation, at least two pure water containers are provided, and the number of disturbance mechanisms is the same as that of the pure water containers and corresponds one-to-one. At least two of the containers are arranged at equal intervals along the width direction of the cold plate.

[0016] The disturbance mechanism and the water triple point reproduction device provided in this application embodiment adopt an indirect disturbance method, without direct contact with water. The reciprocating motion of the disturbance mechanism drives the reciprocating movement of the container, ultimately achieving non-contact disturbance of the pure water inside the container, thus improving the accuracy of the experiment.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A plan view of the disturbance mechanism of a water triple point reproduction device provided in an embodiment of this application is shown.

[0020] Figure 2 A structural diagram of a drawer of a water triple point reproduction device according to an embodiment of this application is shown.

[0021] Figure 3 This paper shows a schematic diagram of the limiting structure of the disturbance mechanism of a water triple point reproduction device provided in an embodiment of this application, which is locked with a cold plate.

[0022] Figure 4 This illustration shows a schematic diagram of the limiting structure and cold plate unlocking structure of the disturbance mechanism of a water triple point reproduction device provided in an embodiment of this application.

[0023] Figure 5 The diagram shows the structure of the limiting structure of the disturbance mechanism of a water triple point reproduction device provided in this application embodiment.

[0024] Among them, 1. Drawer; 11. Slide rail; 2. Pure water container; 3. Temperature control system; 41. Driver; 42. Short connecting rod; 43. Long connecting rod; 44. Cold plate; 45. Limiting structure; 451. Connector; 46. Ear plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] Considering that most existing reproduction devices achieve liquid agitation through stirring shafts and impellers, this direct contact agitation method may affect the three-phase change point of the liquid (water), thus impacting the accuracy of the experiment. This application employs an indirect perturbation method, avoiding direct contact with the water. The reciprocating motion of the perturbation mechanism drives the reciprocating movement of the container, ultimately achieving non-contact perturbation of the pure water inside the container, thereby improving the accuracy of the experiment.

[0027] Figure 1 This paper shows a plan view of the disturbance mechanism of a water triple point reproduction device provided in an embodiment of this application. Figure 2 This paper shows a structural diagram of a drawer in a water triple point reproduction device according to an embodiment of this application. Figure 3This illustration shows a schematic diagram of the limiting structure of the disturbance mechanism of a water triple point reproduction device provided in this application, which is locked with the cold plate. Figure 4 This illustration shows a schematic diagram of the limiting structure and cold plate unlocking structure of the disturbance mechanism of a water triple point reproduction device provided in an embodiment of this application. Figure 5 The diagram shows the structure of the limiting structure of the disturbance mechanism of a water triple point reproduction device provided in this application embodiment.

[0028] like Figures 1 to 5 As shown in the embodiment of this application, a disturbance mechanism of a water triple point reproduction device is disclosed. The reproduction device further includes a drawer 1, a pure water container 2 for holding pure water, and a temperature measurement and control system 3. The temperature measurement and control system 3 is used to measure and control the temperature of the pure water in the pure water container 2. The disturbance mechanism 4 includes a driver 41, a short connecting rod 42, a long connecting rod 43, and a cold plate 44. The driver 41 is disposed at the bottom of the drawer 1. The driver 41 is rotatably connected to one end of the short connecting rod 42 and drives the short connecting rod 42 to rotate around a set axis on the bottom surface of the drawer 1. The other end of the short connecting rod 42 is rotatably connected to one end of the long connecting rod 43, and the other end of the long connecting rod 43 is rotatably connected to the cold plate 44. A slide is provided at the bottom of the drawer 1. The cold plate 44 is located in the slide and is driven to reciprocate through the disturbance mechanism 4. The pure water container 2 is disposed on the cold plate 44, and the pure water in the pure water container 2 is disturbed by the reciprocating motion of the cold plate 44.

[0029] Based on the above embodiments, the number of drawers 1, pure water containers 2, and temperature control systems 3 can be set according to actual conditions. For example, one set of drawers 1, two sets of pure water containers 2, one set of temperature control systems 3, and two sets of disturbance mechanisms can be provided. Cooling water flows inside the cold plate 44 for overall heat dissipation, and the heat dissipation power can be set according to the volume of the pure water containers 2, etc.

[0030] Furthermore, each disturbance mechanism operates in the same state, causing the corresponding pure water container 2 to be disturbed in the same way. The entire disturbance mechanism, through the driver 41, short connecting rod 42, long connecting rod 43, and slide rail 11, causes the pure water container 2 mounted on the cold plate 44 to reciprocate at varying speeds, ultimately disturbing the pure water inside the container 2, which is beneficial for scientific experiments. By adjusting the different length parameters of the short connecting rod 42 and long connecting rod 43, as well as the output speed of the driver 4 (motor and reducer), different maximum acceleration requirements (10g~20g) can be achieved while maintaining a large disturbance displacement.

[0031] The disturbance mechanism of the water triple point reproduction device in this application embodiment is further provided with a limit structure 45 and a limit switch on the drawer 1. The limit structure 45 is connected to the limit switch. The limit switch is configured such that when the cold plate 44 is stationary in the initial position, the limit structure 45 is connected to the cold plate 44, thereby temporarily fixing the cold plate 44. Before the disturbance mechanism 4 drives the cold plate 44 to slide back and forth along the slide rail 11, the limit structure 45 is released from fixing the cold plate 44.

[0032] In conjunction with the above embodiments, since the disturbance mechanism is a moving part, a limiting device 45 is used to limit the cold plate 44 to prevent unnecessary shaking of the disturbance mechanism and the pure water container 2 during launch. During launch, the limiting device 45 can restrict the position of the cold plate 44 and bear a certain launch load. Before the disturbance mechanism needs to operate, the limiting device 45 is energized to release the limit.

[0033] The disturbance mechanism of the water triple point reproduction device in this application embodiment has a limiting structure 45 that is a shape memory alloy puller. The shape memory alloy puller is set on the side wall of the drawer 1. The puller includes a connector 451 made of shape memory alloy wire. A slot matching the shape and size of the connector 451 is provided on the cold plate 44. When the limit switch is disconnected and de-energized, the connector 451 of the shape memory alloy puller is inserted into the slot. When the limit switch is opened and energized, the connector 451 retracts from the slot and loses its fixed connection with the cold plate 44.

[0034] In conjunction with the above embodiments, since it is an in-cabin device, considering safety and low impact requirements, the disturbance mechanism adopts a shape memory alloy pin puller. The shape memory alloy pin puller is a non-pyrotechnic unlocking device. When the SM insulation sleeve wire (shape memory alloy wire) is energized, the SM insulation sleeve wire is heated and contracts, generating a restoring force to release the ball lock mechanism and release the pin. This results in a device that is compact, has a simple power supply, low unlocking impact, is reusable, and highly reliable.

[0035] In this embodiment of the water triple point reproduction device, the disturbance mechanism has an ear plate 46 at one end of the cold plate 44 facing the long connecting rod 43. The ear plate 46 and the corresponding ends of the long connecting rod 43 are respectively provided with connecting holes, which are connected by connecting shafts. The driver 41 is connected to the short connecting rod 42, the short connecting rod 42 and the long connecting rod 43, and the long connecting rod 43 and the cold plate 44 by hinges, ensuring the reciprocating motion of the disturbance mechanism.

[0036] In the disturbance mechanism of the water triple point reproduction device of this application embodiment, each slide is provided with two slide rails 11. The two slide rails 11 are arranged parallel to each other at the bottom of the drawer 1 and the distance between them matches the width of the cold plate 44. The cold plate 44 is located between the two slide rails 11, and the two sides of the cold plate 44 are slidably connected to the two slide rails 11 respectively.

[0037] The disturbance mechanism of the water triple point reproduction device in this embodiment includes a driver 41 comprising a motor and a reducer. The motor and reducer are connected in a transmission connection. The output shaft of the reducer is vertically positioned at the bottom of the drawer 1. The end of the short connecting rod 42 near the reducer is connected to the output shaft. The motor speed can be reduced by the reducer, and adjustments can be made according to different disturbance requirements to meet different design needs.

[0038] The disturbance mechanism of the water triple point reproduction device in this application embodiment includes a heat insulation sleeve assembly and a semiconductor refrigeration chip. The heat insulation sleeve assembly includes a heat insulation sleeve box body, a pure water container 2 is disposed inside the heat insulation sleeve box body, and the heat absorption surface of the semiconductor refrigeration chip is disposed on the heat insulation sleeve box body. The cold plate 44 is connected to a heat pipe, and the heat dissipation surface of the semiconductor refrigeration chip is connected to the heat pipe.

[0039] In conjunction with the above embodiments, the heat-absorbing surface of the thermoelectric cooler is in close contact with the heat-insulating sleeve to control the internal temperature of the pure water container 2. The heat-dissipating surface of the thermoelectric cooler is in close contact with the heat pipe connected to the cold plate 44, and the heat generated by its heating surface is conducted to the cold plate 44 through the heat pipe. This also improves the temperature uniformity inside the heat-insulating sleeve. The pure water container 2 and the heat-insulating sleeve are thermally insulated together by heat-insulating support columns.

[0040] Furthermore, the thermal insulation casing serves as the primary temperature control device for the entire equipment. From the outside in, it comprises aerogel, heat pipes, a thermoelectric cooler, the thermal insulation casing, air, and aerogel. The outermost layer of the entire thermal insulation assembly is wrapped with aerogel to isolate the drawer 1 from heat leakage caused by ambient temperature. The outermost layer of the aerogel is covered with multiple layers of thermal insulation components, further reducing the impact of the drawer 1's internal environment on the thermal insulation casing's heat radiation.

[0041] A thermoelectric cooler is attached to the outside of the insulation casing, with its heat-absorbing surface in close contact with the casing to control the internal temperature. The heat-dissipating surface of the cooler is in close contact with the heat pipe, and the heat generated by its heating surface is conducted to the water-cooled plate 44 through the heat pipe. To improve temperature uniformity within the insulation assembly, the inner surface of the insulation casing is coated with a high-infrared-emissivity black paint. The pure water container 2 is insulated from the insulation casing via insulation support columns.

[0042] The disturbance mechanism of the water triple point reproduction device in this application embodiment includes a temperature measurement and control system 3, which includes a controller connected to a semiconductor cooling chip. The controller is configured to control the magnitude of the current input to the semiconductor cooling chip based on the real-time temperature of the pure water inside the pure water container 2.

[0043] This application also provides a water triple point reproduction device corresponding to the disturbance mechanism of the water triple point reproduction device. Since the principle of the water triple point reproduction device in this application is similar to the disturbance mechanism of the water triple point reproduction device described above in this application, the implementation of the water triple point reproduction device can refer to the implementation of the disturbance mechanism of the water triple point reproduction device. The repeated parts will not be described again.

[0044] An embodiment of this application provides a water triple point reproduction device, which includes the aforementioned disturbance mechanism.

[0045] In the water triple point reproduction device of this application embodiment, at least two pure water containers 2 are provided, and the number of disturbance mechanisms 2 is the same as that of the pure water containers 2 and corresponds one-to-one. At least two pure water containers 2 are arranged at equal intervals along the width direction of the corresponding cold plate 44.

[0046] In conjunction with the above embodiments, an indirect disturbance method is adopted, without direct contact with water. The reciprocating motion of the disturbance mechanism 4 drives the reciprocating movement of the pure water container 2, ultimately achieving non-contact disturbance of the pure water inside the pure water container 2, thus improving the accuracy of the experiment.

[0047] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A disturbance mechanism for a water triple point reproduction device, characterized in that, The reproduction device further includes a drawer, a pure water container for holding pure water, and a temperature control system. The pure water container is located at the bottom of the drawer, and the temperature control system is used to measure and control the temperature of the pure water in the pure water container. The disturbance mechanism includes a driver, a short connecting rod, a long connecting rod, and a cold plate. The driver is located at the bottom of the drawer and is rotatably connected to one end of the short connecting rod, driving the short connecting rod to rotate around a predetermined axis on the bottom surface of the drawer. The other end of the short connecting rod is rotatably connected to one end of the long connecting rod, and the other end of the long connecting rod is rotatably connected to the cold plate. A slide is provided at the bottom of the drawer, and the cold plate is located in the slide and is driven to reciprocate by the disturbance mechanism. The pure water container is located on the cold plate, and the pure water in the pure water container is disturbed by the reciprocating motion of the cold plate. The drawer is also provided with a limit structure and a limit switch, the limit structure being connected to the limit switch; the limit switch is configured such that when the cold plate is stationary in the initial position, the limit structure is connected to the cold plate; and before the disturbance mechanism drives the cold plate to slide back and forth along the slide, the limit structure is disconnected from the cold plate. The limiting structure is a shape memory alloy puller, which is installed on the side wall of the drawer. The puller includes a connector made of shape memory alloy wire, and a slot with a matching shape and size is provided on the cold plate. When the limit switch is turned off and de-energized, the connector of the shape memory alloy puller is inserted into the slot. When the limit switch is turned on and energized, the connector retracts from the slot.

2. The disturbance mechanism of the water triple point reproduction device according to claim 1, characterized in that, The end of the cold plate facing the long connecting rod is provided with an ear plate, and the ear plate and the corresponding end of the long connecting rod are respectively provided with a connecting hole, and the two connecting holes are respectively connected by a connecting shaft.

3. The disturbance mechanism of the water triple point reproduction device according to claim 1, characterized in that, Each slide is provided with two slide rails, which are arranged parallel to each other at the bottom of the drawer and the distance between them matches the width of the cold plate. The cold plate is located between the two slide rails, and both sides of the cold plate are slidably connected to the two slide rails respectively.

4. The disturbance mechanism of the water triple point reproduction device according to claim 1, characterized in that, The drive includes a motor and a reducer. The motor is connected to the reducer in a transmission manner. The output shaft of the reducer is vertically arranged at the bottom of the drawer. The end of the short connecting rod near the reducer is connected to the output shaft.

5. The disturbance mechanism of the water triple point reproduction device according to claim 1, characterized in that, The disturbance mechanism further includes a heat insulation sleeve assembly and a semiconductor refrigeration chip. The heat insulation sleeve assembly includes a heat insulation sleeve housing, the pure water container is disposed inside the heat insulation sleeve housing, and the heat absorption surface of the semiconductor refrigeration chip is disposed on the heat insulation sleeve assembly. The cold plate is connected to a heat pipe, and the heat dissipation surface of the semiconductor refrigeration chip is connected to the heat pipe.

6. The disturbance mechanism of the water triple point reproduction device according to claim 5, characterized in that, The temperature measurement and control system includes a controller connected to the thermoelectric cooler. The controller is configured to control the current input to the thermoelectric cooler based on the real-time temperature of the purified water inside the purified water container.

7. A water triple point reproduction device, characterized in that, Includes the disturbance mechanism as described in any one of claims 1 to 6.

8. The water triple point reproduction device according to claim 7, characterized in that, At least two pure water containers are provided, and the number of disturbance mechanisms is the same as that of the pure water containers and corresponds one-to-one. At least two of the containers are arranged at equal intervals along the width direction of the cold plate.

Images