Sample solidification device

Abstract

The utility model discloses a sample solidification device which comprises a container, a sample preparation mold, a reference mold, a temperature measuring unit, a heating unit, a circulating cooling loop and a control system, the sample preparation mold and the reference mold are respectively inserted into the container, and the temperature measuring unit is arranged in the reference mold; a flow valve is arranged on the circulating cooling loop; the control system is connected with the heating unit, the temperature measuring unit and the flow valve, and the control system controls the opening degree of the flow valve according to the set cooling rate and the temperature measured by the temperature measuring unit, so that the flow of the coolant in the circulating cooling loop is controlled, and the cooling rate is controlled. According to the sample solidification device disclosed by the utility model, the reference mold is matched with the sample preparation mold, the temperature measuring unit is arranged in the reference mold, and the temperature of a sample material in the sample preparation mold is monitored by monitoring the temperature of the sample material in the reference mold; temperature monitoring and coolant flow control are combined, so that the cooling rate of the sample is accurately controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of metal alloy materials, in particular to a sample solidification device. Background Art

[0002] Metal and alloy materials are an important material basis of human civilization. They affect the historical development of mankind in all aspects. They are essential basic materials and important materials for the development of the national economy, people's daily life, defense industry, and science and technology. With the development of society and the advancement of science and technology, metals and materials are constantly being innovated, and many emerging metal and alloy materials have emerged, such as superconducting materials, high entropy alloys, amorphous alloys, etc. Solidification, as the science and technology of forming materials from liquid to solid, is widely used in the field of metal and alloy material preparation. In addition to the material composition, an important condition for preparing metals and alloys by solidification is the cooling rate. The cooling rate determines the solidification structure of metals and alloys. Especially for multi-component and multi-component alloys, the cooling rate not only determines the solidification structure morphology, but also has an extremely important influence on the precipitation order, type and quantity of phases. Therefore, in the preparation process of special or new metal alloy materials such as high entropy alloys and amorphous alloys, it is very important to accurately control the cooling rate. In the process of studying the properties of metal alloy materials, analyzing the influence of cooling rate on materials is also a very important link.

[0003] At present, the commonly used methods for preparing metal and alloy materials mainly include sand casting, die casting, vacuum casting, jet forming, copper mold suction casting, mechanical alloying, etc. Among them, sand casting, die casting, vacuum casting and other methods are suitable for industrial mass production, and have advantages such as good economy and the ability to prepare large and complex castings, but have disadvantages such as inaccurate temperature control and complicated procedures; and although methods such as jet forming and copper mold suction casting can obtain very high cooling rates, the cooling rate is difficult to control accurately, and there are problems such as complex equipment and high cost. When conducting scientific research on the properties of metals and alloys, the required research samples are usually small in size and require precise temperature control, so the above preparation methods are not applicable. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sample solidification device capable of accurately controlling the cooling rate.

[0005] The technical solution adopted by the utility model to solve the technical problem is: to provide a sample solidification device, including a container for containing a heat-conducting medium, a sample preparation mold and a reference mold respectively used to fill the sample material, a temperature measuring unit for detecting the temperature of the sample material, a heating unit for heating the heat-conducting medium in the container, a circulating cooling circuit for cooling the heat-conducting medium in the container, and a control system;

[0006] The sample preparation mold and the reference mold are respectively inserted into the container, and the temperature measuring unit is arranged in the reference mold;

[0007] A flow valve is provided on the circulating cooling circuit; the control system is connected to the heating unit, the temperature measuring unit and the flow valve respectively, and the control system controls the opening of the flow valve according to the set cooling rate and the temperature measured by the temperature measuring unit, thereby controlling the coolant flow in the circulating cooling circuit and realizing the control of the cooling rate.

[0008] In some embodiments, the circulating cooling loop includes a cooling channel disposed in the container and used for the coolant to circulate therein, a circulating cooling control terminal, an inlet pipe connected between an inlet end of the cooling channel and the circulating cooling control terminal, and an outlet pipe connected between an outlet end of the cooling channel and the circulating cooling control terminal;

[0009] The flow valve is at least arranged on the inlet pipe.

[0010] In some embodiments, the circulation cooling loop includes a cooling coil disposed in the container, and the cooling channel is formed in the cooling coil.

[0011] In some embodiments, the cooling coil comprises a spiral cooling coil.

[0012] In some embodiments, the circulating cooling control terminal is provided with a heating mechanism and / or a cooling mechanism for controlling the temperature of the coolant.

[0013] In some embodiments, the sample preparation mold is a metal mold or an inorganic non-metal mold; the reference mold is a metal mold or an inorganic non-metal mold.

[0014] In some embodiments, the container includes a tank body with an open top and a flange that fits on the top of the tank body and closes the top; one end of the sample preparation mold and the reference mold are respectively fixed to the flange, so that they are respectively suspended in the tank body.

[0015] In some embodiments, the temperature measuring unit is a thermocouple or a thermal resistor.

[0016] In some embodiments, the heating unit is installed on the container to heat and / or keep the container warm.

[0017] In some embodiments, the heating unit includes a heating component attached to the outer wall surface of the container.

[0018] The beneficial effects of the utility model are as follows: a reference mold is arranged to cooperate with the sample preparation mold, a temperature measuring unit is arranged in the reference mold, and the temperature of the sample material in the sample preparation mold is monitored by monitoring the temperature of the sample material in the reference mold; and accurate control of the cooling rate of the sample is achieved by combining temperature monitoring and coolant flow control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 It is a structural schematic diagram of a sample coagulation device according to an embodiment of the utility model;

[0021] Figure 2 It is a time-temperature curve diagram of the solidification process of the lead-bismuth eutectic alloy obtained in the embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a sample solidification device according to an embodiment of the present invention may include a container 10 , a sample preparation mold 20 , a reference mold 30 , a temperature measurement unit 40 , a heating unit 50 , a circulating cooling loop 60 and a control system 70 .

[0024] The cavity inside the container 10 can be used to hold a heat-conducting medium, such as molten salt, air, heat-conducting oil, water, etc. The heating unit 50 is installed on the container 10, and is used to heat and / or keep the heat-conducting medium inside the container 10. The sample preparation mold 20 and the reference mold 30 are respectively inserted and positioned inside the container 10, and can be immersed in the heat-conducting medium.

[0025] The sample preparation mold 20 is used as a mold for preparing samples and is used to fill the sample material therein; the sample preparation mold 20 is inserted and positioned inside the container 10 and can be immersed in a heat-conducting medium. In the container 10, the heat-conducting medium transfers heat to the sample mold, and can heat, melt, or keep warm the sample material in the sample preparation mold 20, etc. After the sample material solidifies, a sample corresponding to the shape of the inner cavity of the sample preparation mold 20 can be formed. The reference mold 30 is also used to fill the sample material therein, and the sample material is the same material as the sample material filled in the sample preparation mold 20. The reference mold 30 is inserted and positioned inside the container 10 and can be immersed in a heat-conducting medium. The temperature measuring unit 40 is arranged in the reference mold 30, and is used to measure the temperature and temperature change of the sample material in the reference mold 30, so as to obtain the temperature and temperature change of the sample material in the sample preparation mold 20.

[0026] The sample materials include but are not limited to metal or alloy materials such as lead-bismuth eutectic alloy, lead-based alloys, bismuth-based alloys, and gallium-based alloys.

[0027] The circulating cooling loop 60 is used to cool the heat-conducting medium in the container 10, and in combination with the heat transfer principle, the purpose of cooling the samples in the sample preparation mold 20 and the reference mold 30 is achieved. A flow valve 61 is provided on the circulating cooling loop 60; the control system 70 is connected to the temperature measuring unit 40 and the flow valve 61 respectively, and controls the opening of the flow valve 61 according to the set cooling rate and the temperature measured by the temperature measuring unit 40, thereby controlling the coolant flow in the circulating cooling loop 60, and realizing the control of the cooling rate of the sample.

[0028] In some embodiments, the container 10 may include a tank body 11 with an open top and a flange 12, wherein the flange 12 is fitted on the top of the tank body 11 to seal the top of the tank body 11. The flange 12 is preferably detachably mounted on the tank body 11, so as to facilitate replacement and maintenance of the tank body 11 and the structural parts disposed in the tank body 11.

[0029] The tank body 11 may be, but is not limited to, a stainless steel tank body.

[0030] The sample mold 20 and the reference mold 30 are respectively inserted into the tank body 11 and extend along the depth of the tank body 11. The ends of the sample mold 20 and the reference mold 30 away from the bottom of the tank body 11 (which can be called the top end) are respectively fixed on the flange 12, so that they are respectively suspended in the tank body 11. The top ends of the sample mold 20 and the reference mold 30 can also be exposed or protruded on the top surface of the flange 12 to facilitate operations such as filling of sample materials.

[0031] As an option, the sample preparation mold 20 and the reference mold 30 can be metal molds such as copper-based molds, or inorganic non-metal molds such as ceramics.

[0032] The sample preparation mold 20 and the reference mold 30 may further be, but not limited to, a tube structure; the shape and structure of the sample preparation mold 20 and the reference mold 30 may be determined according to the structural requirements of the sample to be prepared.

[0033] The temperature measuring unit 40 can be inserted into the reference mold 30 through the top end of the reference mold 30 located on the flange 12. The temperature measuring unit 40 can be selected from but not limited to a thermocouple or a thermal resistor.

[0034] The heating unit 50 is used to heat the heat-conducting medium in the container 10, and can also keep the heat-conducting medium warm. The control system 70 is connected to the heating unit 50 to control the opening and closing of the heating unit 50, and also to control the heating rate and heat preservation of the sample by controlling the power of the heating unit 50.

[0035] The heating unit 50 may be installed outside the container 10 or inside the container 10. Figure 1In the illustrated embodiment, the heating unit 50 includes a heating component attached to the outer wall surface of the container 10. The heating component may be a heating tube, a heating plate, a heating rod, etc., or a combination of two or more of the heating tube, heating plate and heating rod.

[0036] The circulating cooling loop 60 includes a cooling channel for the coolant to circulate therein. The cooling channel is arranged in the tank body 11 of the container 10. The heat transfer medium is uniformly cooled by heat exchange between the coolant in the cooling channel and the heat transfer medium in the tank body 11.

[0037] The coolant is a cooling medium such as thermal oil, water, air, and nitrogen.

[0038] In some embodiments, the circulating cooling loop 60 includes a cooling coil 62, and a cooling channel is formed in the cooling coil 62. The vertical height of the cooling coil 62 in the tank body 11 is set corresponding to the depth of the tank body 11, so that the heat transfer medium in the tank body 11 can achieve a uniform cooling effect and the overall temperature is uniform.

[0039] The cooling coil 62 preferably comprises a spiral cooling coil. When a spiral cooling coil is used, the spiral cooling coil also surrounds the periphery of the sample preparation mold 20 and the reference mold 30 in the tank body 11.

[0040] The circulating cooling loop 60 further includes a circulating cooling control terminal 63, an inlet pipe 64 and an outlet pipe 65. The inlet pipe 64 is connected between the inlet end of the cooling channel (i.e., the cooling coil 62) and the circulating cooling control terminal 63, and the outlet pipe 65 is connected between the outlet end of the cooling channel (i.e., the cooling coil 62) and the circulating cooling control terminal 63, forming a cooling loop in which the coolant circulates. The coolant enters the cooling coil 62 through the inlet pipe 64, and the coolant flows back to the circulating cooling control terminal 63 from the cooling coil 62 through the outlet pipe 65.

[0041] At least one of a heating mechanism and a cooling mechanism is provided in the circulating cooling control terminal 63. The heating mechanism and the cooling mechanism are used to heat and cool the coolant respectively to achieve the purpose of controlling the coolant temperature, and then control the temperature of the coolant entering the cooling coil 62 as needed to meet the corresponding cooling temperature requirements.

[0042] The circulating cooling control terminal 63 may be integrated with a circulating cooling system having a heating mechanism and / or a cooling mechanism, and may also include a coolant source, such as an oil tank, a water tank, a gas cylinder, etc., which respectively provide coolants such as heat transfer oil, water, air (or nitrogen), etc.

[0043] The flow valve 61 is at least arranged on the inlet pipe 64 , and the flow rate of the coolant passing through the inlet pipe 64 can be controlled to control the flow rate of the coolant entering the cooling coil 62 .

[0044] The control system 70 may include an intelligent temperature control box, and a PID control system may be used to implement intelligent control.

[0045] The sample solidification device of the utility model is suitable for small samples, such as small-size samples required for scientific research on metal and alloy properties.

[0046] The application of the utility model is described below using lead-bismuth eutectic alloy as a sample material:

[0047] Ceramic tubes are used as the sample mold 20 and the reference mold 30, respectively, a thermocouple is used as the temperature measuring unit 40, the container 10 is filled with heat transfer oil as the heat transfer medium, and air is used as the coolant. The lead-bismuth eutectic alloy is filled into the sample mold 20 and the reference mold 30, respectively, and the cooling rate is set to 1°C / min through the control system 70. The time-temperature curve of the solidification process of the lead-bismuth eutectic alloy finally obtained by the sample solidification device of the utility model is as follows: Figure 2 shown.

[0048] It can be understood that in the present invention, a wide cooling rate range can be obtained by replacing the cooling medium and the heat-conducting medium; different cooling conditions can be achieved by replacing the cooling medium, the heat-conducting medium and the mold; and the sample preparation mold 20 and the reference mold 30 of corresponding sizes can also be replaced according to the solidification samples with different required sizes.

[0049] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sample coagulation device, characterized in that: It includes a container for containing a heat-conducting medium, a sample preparation mold and a reference mold for filling sample materials respectively, a temperature measuring unit for detecting the temperature of the sample material, a heating unit for heating the heat-conducting medium in the container, a circulating cooling circuit for cooling the heat-conducting medium in the container, and a control system; The sample preparation mold and the reference mold are respectively inserted into the container, and the temperature measuring unit is arranged in the reference mold; A flow valve is provided on the circulating cooling circuit; the control system is connected to the heating unit, the temperature measuring unit and the flow valve respectively, and the control system controls the opening of the flow valve according to the set cooling rate and the temperature measured by the temperature measuring unit, thereby controlling the coolant flow in the circulating cooling circuit and realizing the control of the cooling rate.

2. The sample coagulation device according to claim 1, characterized in that: The circulating cooling loop includes a cooling channel disposed in the container and used for the coolant to circulate therein, a circulating cooling control terminal, an inlet pipe connected between the inlet end of the cooling channel and the circulating cooling control terminal, and an outlet pipe connected between the outlet end of the cooling channel and the circulating cooling control terminal; The flow valve is at least arranged on the inlet pipe.

3. The sample coagulation device according to claim 2, characterized in that: The circulating cooling loop includes a cooling coil disposed in the container, and the cooling channel is formed in the cooling coil.

4. The sample coagulation device according to claim 3, characterized in that: The cooling coil comprises a spiral cooling coil.

5. The sample coagulation device according to claim 2, characterized in that: The circulating cooling control terminal is provided with a heating mechanism and / or a cooling mechanism for controlling the temperature of the coolant.

6. The sample coagulation device according to claim 1, characterized in that: The sample preparation mold is a metal mold or an inorganic non-metal mold; the reference mold is a metal mold or an inorganic non-metal mold.

7. The sample coagulation device according to claim 1, characterized in that: The container comprises a tank body with an open top and a flange fitted on the top of the tank body to seal the top; one end of the sample preparation mold and the reference mold are respectively fixed on the flanges, so as to be suspended in the tank body respectively.

8. The sample coagulation device according to claim 1, characterized in that: The temperature measuring unit is a thermocouple or a thermal resistor.

9. The sample coagulation device according to any one of claims 1 to 8, characterized in that: The heating unit is installed on the container to heat and / or keep the container warm.

10. The sample coagulation device according to claim 9, characterized in that: The heating unit includes a heating component attached to the outer wall surface of the container.

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