Polymer material glass transition temperature pretreatment equipment

Abstract

The present invention discloses a polymer material glass transition temperature pretreatment device, which belongs to the field of medical device inspection technology. Its structure includes a furnace and a quenching chamber arranged in sequence, the furnace and the quenching chamber are separated by an insulation block, and a valve for driving the insulation block to open and close is arranged on the insulation block; a specimen rack is arranged in the main body of the equipment, one end of the specimen rack is used to install the specimen, and the other end is connected to a driving device, the driving device drives the specimen rack to move between the furnace and the quenching chamber, and the furnace and the quenching chamber are respectively provided with an air inlet and an air outlet. The technical solution of the example of the present invention can quickly cool the material without contacting the air after the material is heated, which is not only suitable for the glass transition temperature pretreatment of polymer materials, but also suitable for the pretreatment of alloy materials to eliminate thermal history, which is easy to use and efficient, and meets the requirements of relevant standards.

Description

Technical Field

[0001] The present invention relates to the technical field of medical device inspection, in particular to pretreatment equipment for medical device inspection, specifically to a polymer material glass transition temperature pretreatment equipment. Background Art

[0002] Glass transition refers to a reversible change of an amorphous polymer or an amorphous region in a semi-crystalline polymer from a viscous or rubbery state to a hard, relatively brittle glass state. Glass transition temperature refers to the approximate midpoint of the temperature range where glass transition occurs.

[0003] The glass transition temperature directly affects the performance and process performance of the material. In order to ensure the safety and reliability of the use of medical devices, the materials of medical devices must undergo the measurement of the glass transition temperature. Before the measurement of the glass transition temperature, the material needs to be pretreated.

[0004] The national standard GB / T19466.2-2004 "Plastic Differential Scanning Calorimetry (DSC) Part 2: Determination of Glass Transition Temperature" provides a normative overview of the pretreatment method for determining the glass transition temperature, but does not provide specific implementation equipment. When pretreating the material, it needs to be heated to a high temperature and then quickly cooled in an oxygen-free environment. The faster the cooling speed, the more conducive it is to improving the test efficiency and the accuracy of the results.

[0005] At present, muffle furnaces are generally used for heating during pretreatment operations. However, rapid cooling of materials has always been a problem. If the materials are cooled inside the equipment, the cooling speed is very slow; if the materials are taken out for cooling, they will come into contact with the air, which cannot meet the test requirements.

[0006] In summary, designing a device that can quickly cool materials without contact with air is a problem that needs to be solved at present. Summary of the invention

[0007] In order to solve the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a polymer material glass transition temperature pretreatment device, which can quickly cool the material without contacting the air after heating the material, is easy to use, highly efficient, and meets the requirements of relevant standards.

[0008] The technical solution adopted by the present invention to solve the technical problem is:

[0009] Provided is a polymer material glass transition temperature pretreatment device, comprising a device body, the device body comprising a furnace and a quenching chamber arranged in sequence, the furnace and the quenching chamber being separated by a heat insulation block, the heat insulation block being provided with a valve for driving the heat insulation block to open and close; a specimen rack is provided in the device body, one end of the specimen rack is used for mounting the specimen, the other end of the specimen rack is connected to a driving device, the driving device drives the specimen rack to move between the furnace and the quenching chamber;

[0010] A heating device is provided in the furnace, a water tank for containing an ice-water mixture is provided in the quenching chamber, a water inlet and a water outlet are provided on the quenching chamber, both the water inlet and the water outlet are connected with the water tank, and an air inlet and an air outlet are provided on the furnace and the quenching chamber respectively; the air inlet is connected to an oxygen-free inflation system, and the air outlet is connected to a vacuum pump.

[0011] Furthermore, the furnace is located above the quenching chamber, the driving device is located above the furnace, and the driving device drives the specimen rack to move up and down.

[0012] Furthermore, the driving device includes a motor and a screw, the output shaft of the motor is connected to the screw and drives the screw to rotate, and a moving block is provided at one end of the specimen holder that cooperates with the driving device, and the moving block cooperates with the screw through a thread to form a ball screw pair.

[0013] Furthermore, a cooling system is provided on the outside of the driving device.

[0014] Furthermore, an oxygen meter is provided on the furnace.

[0015] Furthermore, the furnace is provided with an openable door, the door is hinged on the side wall of the furnace, a sealing ring is provided at the matching position between the door and the furnace, and mutually matching locking buckles are provided between the door and the side wall of the furnace.

[0016] Furthermore, a thermocouple is arranged on the furnace, and the temperature measuring part of the thermocouple extends into the furnace.

[0017] Furthermore, the valve is connected to a handwheel located outside the device via a transmission rod, and the handwheel drives the valve to open and close via the transmission rod.

[0018] Furthermore, the valve is provided with a linkage contact, which is connected to the working circuit of the driving device. The opening and closing of the valve can drive the linkage contact to connect and disconnect the working circuit of the driving device.

[0019] Furthermore, heat dissipation holes are provided on the side walls of the quenching chamber.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The polymer material glass transition temperature pretreatment equipment of the present invention is provided with a furnace and a quenching chamber in sequence, which are separated by an openable insulation block. After the specimen is heated in the furnace, the insulation block is directly opened, and the specimen rack is driven by a driving device to send it into the ice-water mixture in the quenching chamber for rapid cooling. The air inlet and air outlet arranged on the quenching chamber can create an oxygen-free environment for the quenching chamber, ensuring that the specimen is quickly cooled without contacting oxygen. It is not only suitable for the glass transition temperature pretreatment of polymer materials, but also suitable for the pretreatment of alloy materials to eliminate thermal history, which is beneficial to improving the test efficiency and the accuracy of the results.

[0022] 2. The polymer material glass transition temperature pretreatment equipment of the example of the present invention has a furnace and a quenching chamber arranged up and down, which is more compact and occupies a small area, making it convenient to set up a water tank and a driving device, making the structure of the equipment simpler.

[0023] 3. The polymer material glass transition temperature pretreatment equipment exemplified in the present invention adopts a ball screw pair as a driving device, and the mechanical transmission method is more adaptable to the working environment with a large temperature change range, and has reliable operation and a long service life.

[0024] 4. In the polymer material glass transition temperature pretreatment equipment exemplified in the present invention, a cooling system is arranged on the outside of the driving device. Since the driving device is arranged close to the furnace, the cooling system can cool the driving device to prevent it from being in an overheated environment for a long time, thereby ensuring the service life of the driving device.

[0025] 5. The polymer material glass transition temperature pretreatment equipment of the present invention is provided with an oxygen meter on the furnace to detect the oxygen content inside the equipment, to ensure that the heating and cooling process of the test piece is in an oxygen-free environment, to ensure the standard of the treatment process, and to provide a guarantee for the accuracy of the test results.

[0026] 6. The polymer material glass transition temperature pretreatment equipment of the example of the present invention is provided with an openable door on the furnace to facilitate the maintenance of the equipment, a sealing ring is provided at the joint between the door and the furnace, and mutually cooperating locking buckles are provided between the door and the side wall of the furnace to ensure the sealing of the furnace during operation.

[0027] 7. The polymer material glass transition temperature pretreatment equipment of the example of the present invention is provided with a thermocouple on the furnace, which is convenient for people to understand the temperature inside the furnace in real time and facilitates standardized operation. At the same time, the thermocouple is a passive sensor, which does not require an external power supply for measurement, is easy to use and has high safety. The valve is connected to a handwheel located outside the equipment through a transmission rod. Since the position of the insulation block is adjacent to the furnace, the opening and closing of the valve is manually controlled by the handwheel, and there is no need to connect a power supply, which increases safety and reliability.

[0028] 8. The polymer material glass transition temperature pretreatment equipment of the example of the present invention has a linkage contact on the valve. When the valve is in a closed state, the linkage contact will disconnect the working circuit of the drive device, so that the specimen rack cannot be lowered, avoiding equipment damage caused by misoperation and increasing the reliability of the equipment.

[0029] 9. The polymer material glass transition temperature pretreatment equipment in the example of the present invention has an air inlet connected to an oxygen-free charging system and an air outlet connected to a vacuum pump. A vacuum environment can be formed inside the equipment by filling with inert gas or evacuating the air. The equipment is flexible to use and can adapt to different needs. Heat dissipation holes are provided on the side walls of the quenching chamber to dissipate heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0031] Figure 1 It is a schematic diagram of the main structure of an embodiment of the present invention;

[0032] Figure 2 It is a side view structural schematic diagram of an embodiment of the present invention;

[0033] Figure 3 Schematic diagram of the internal structure of an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of the structure of the test piece rack in the embodiment of the present invention.

[0035] In the figure: 1 furnace, 2 quenching chamber, 3 driving device, 4 specimen rack, 41 bracket, 42 specimen placement area, 5 cooling system, 6 door, 7 sealing ring, 8 locking buckle, 9 water inlet, 10 operation panel, 11 moving wheel, 12 hand wheel, 13 oxygen meter, 14 air outlet, 15 insulation block, 16 air inlet, 17 thermocouple, 18 water outlet, 19 drain outlet. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0037] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0038] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings.

[0042] like Figure 1-Figure 3 As shown, this embodiment provides a polymer material glass transition temperature pretreatment device, including a device body, the device body includes a furnace 1 and a quenching chamber 2 arranged in sequence, the furnace 1 and the quenching chamber 2 are separated by an insulation block 15, and the insulation block 15 is provided with a valve for driving the insulation block 15 to open and close; a specimen rack 4 is arranged in the device body, one end of the specimen rack 4 is used to install the specimen, and the other end of the specimen rack 4 is connected to a driving device 3, and the driving device 3 drives the specimen rack 4 to move between the furnace 1 and the quenching chamber 2.

[0043] A heating device is provided in the furnace 1, a water tank for containing an ice-water mixture is provided in the quenching chamber 2, a water inlet 9 and a water outlet 18 are provided on the quenching chamber 2, and the water inlet 9 and the water outlet 18 are both connected to the water tank, and an air inlet 16 and an air outlet 14 are provided on the furnace 1 and the quenching chamber 2 respectively; the air inlet 16 is connected to an oxygen-free inflation system, and the air outlet 14 is connected to a vacuum pump.

[0044] In this embodiment, the furnace 1 is located above the quenching chamber 2, the driving device 3 is located above the furnace 1, and the driving device 3 drives the specimen rack 4 to move up and down. This arrangement facilitates the arrangement of the water tank and the driving device, making the structure of the device simpler and more compact, and occupying a small area.

[0045] Specifically, the driving device 3 of this embodiment includes a motor and a screw, the output shaft of the motor is connected to the screw and drives the screw to rotate, and a moving block is provided at one end of the specimen holder 4 that cooperates with the driving device 3, and the moving block cooperates with the screw through a thread to form a ball screw pair.

[0046] The structure of the test piece rack 4 is as follows Figure 4 As shown, it includes a bracket 41 and a specimen placement area 42, the specimen placement area 42 is connected to the bottom end of the bracket 41, and the specimen placement area 42 can be set as a groove, a placement plate or a clamp or the like for carrying the specimen. The top end of the bracket is connected to the moving block, and the moving block is matched with the lead screw thread. The heating device uses an electric heating wire, which can work normally in an oxygen-free environment, and the oxygen-free gas filling system can use a device for filling nitrogen or other inert gas.

[0047] In order to effectively cool the driving device 3 and ensure its working reliability and service life, a cooling system 5 is provided outside the driving device 3. Specifically, the cooling system 5 adopts water cooling, and a cooling coil is provided at the part of the driving device 3 located outside the furnace 1, and a water inlet and a water outlet are provided at both ends of the cooling coil.

[0048] In order to facilitate understanding of the oxygen content inside the equipment and ensure that an oxygen-free environment is formed inside the equipment, an oxygen meter 13 is provided on the furnace 1. Specifically, the oxygen meter 13 can be set on the air outlet 14 of the furnace 1, so that people can intuitively understand the oxygen content inside.

[0049] To facilitate the use and maintenance of the equipment, the furnace 1 is provided with an openable door 6, which is hinged on the side wall of the furnace 1. To avoid heat loss, a sealing ring 7 is provided at the fitting point between the door 6 and the furnace 1, and a locking buckle 8 that cooperates with each other is provided between the door 6 and the side wall of the furnace 1.

[0050] The furnace 1 is also provided with a thermocouple 17, and the temperature measuring part of the thermocouple 17 extends into the furnace 1. The thermocouple 17 can measure the temperature inside the furnace 1 in real time, and the thermocouple is a passive sensor, which does not require an external power supply during measurement, is easy to use and has high safety.

[0051] The valve is a manual valve, which is connected to a hand wheel 12 located outside the equipment through a transmission rod, and the hand wheel 12 drives the valve to open and close through the transmission rod. Because the position of the valve setting will be affected by the high temperature of the furnace 1, a manual valve is used, which relies on mechanical transmission for transmission, which has higher safety and reliability.

[0052] The valve is provided with linkage contacts, which are connected to the working circuit of the drive device 3. The opening and closing of the valve can drive the linkage contacts to connect and disconnect the working circuit of the drive device 3. When the valve is closed, the heat insulation block 15 separates the furnace 1 and the quenching chamber 2. At this time, the linkage contact disconnects the working circuit of the drive device 3. During the heating process of the furnace 1, the specimen rack 4 cannot be lowered, making the equipment safer and more reliable. When the valve is opened, the heat insulation block 15 opens the passage between the furnace 1 and the quenching chamber 2. At this time, the linkage contact closes the working circuit of the drive device 3. The drive device 3 can operate to drive the specimen rack 4 to drive the specimen from the furnace 1 into the quenching chamber 2 for rapid cooling.

[0053] To facilitate heat dissipation of the quenching chamber 2, heat dissipation holes are provided on the side wall of the quenching chamber 2. To facilitate the movement of the device, a moving wheel 11 is provided at the bottom of the device. To facilitate the complete drainage of water in the water tank, a drain port 19 communicating with the water tank can also be provided at the bottom of the quenching chamber 2.

[0054] To facilitate the operation of the equipment, the polymer material glass transition temperature pretreatment equipment exemplified in the present invention can be configured with an operation panel 10. The operation panel 10 can be set to a button type or a touch screen type. The action of the drive device 3 is controlled by the operation panel 10. It is very common in the prior art to set an operation panel for the equipment, and its specific setting method will not be repeated here.

[0055] When in use, the specimen is placed on the specimen placement area 42 of the specimen rack 4, and the specimen is placed in the furnace 1 through the specimen rack 4, and the door 6 and the insulation block 15 of the furnace 1 are closed, and the ice-water mixture is injected into the water tank of the quenching chamber 2 through the water inlet 9. The inside of the equipment is evacuated by a vacuum pump, or nitrogen or other inert gas is injected into the inside of the equipment through an oxygen-free inflation system to discharge the air in the equipment, so that an oxygen-free environment is formed inside the equipment. After the electric heating wire of the furnace 1 is started to heat the specimen to the set temperature, the electric heating wire stops working, the insulation block 15 is opened by operating the valve through the hand wheel 12, and the drive device 3 is started to send the specimen into the ice-water mixture in the quenching chamber 2 to achieve rapid cooling in an oxygen-free environment.

[0056] The technical solution of the present invention is not only applicable to the glass transition temperature pretreatment of polymer materials, but also applicable to the thermal history elimination pretreatment of alloy materials, which is beneficial to improving the test efficiency and the accuracy of the results.

[0057] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0058] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. A polymer material glass transition temperature pretreatment device, characterized in that: The device comprises a main body, which comprises a furnace and a quenching chamber arranged in sequence, wherein the furnace and the quenching chamber are separated by a heat insulating block, and a valve for driving the heat insulating block to open and close is arranged on the heat insulating block; a specimen rack is arranged in the main body of the device, one end of the specimen rack is used for mounting the specimen, and the other end of the specimen rack is connected to a driving device, and the driving device drives the specimen rack to move between the furnace and the quenching chamber; A heating device is provided in the furnace, a water tank for holding an ice-water mixture is provided in the quenching chamber, a water inlet and a water outlet are provided on the quenching chamber, and the water inlet and the water outlet are both connected to the water tank, and an air inlet and an air outlet are provided on the furnace and the quenching chamber, respectively; the air inlet is connected to an oxygen-free gas charging system, and the air outlet is connected to a vacuum pump; A cooling system is provided on the outer side of the driving device; The valve is provided with a linkage contact, which is connected to the working circuit of the driving device. The opening and closing of the valve can drive the linkage contact to connect and disconnect the working circuit of the driving device.

2. The polymer material glass transition temperature pretreatment device according to claim 1, characterized in that: The furnace is located above the quenching chamber, the driving device is located above the furnace, and the driving device drives the specimen rack to move up and down.

3. The polymer material glass transition temperature pretreatment device according to claim 1, characterized in that: The driving device comprises a motor and a lead screw, wherein the output shaft of the motor is connected to the lead screw and drives the lead screw to rotate, and a moving block is arranged at one end of the specimen holder that cooperates with the driving device, and the moving block cooperates with the lead screw through threads to form a ball screw pair.

4. The polymer material glass transition temperature pretreatment device according to claim 1, characterized in that: An oxygen meter is arranged on the furnace.

5. The polymer material glass transition temperature pretreatment equipment according to claim 1, characterized in that: The furnace is provided with an openable door, the door is hinged on the side wall of the furnace, a sealing ring is provided at the matching position between the door and the furnace, and mutually matching locking buckles are provided between the door and the side wall of the furnace.

6. The polymer material glass transition temperature pretreatment device according to claim 1, characterized in that: A thermocouple is arranged on the furnace, and the temperature measuring part of the thermocouple extends into the furnace.

7. The polymer material glass transition temperature pretreatment equipment according to claim 1, characterized in that: The valve is connected to a hand wheel located outside the device through a transmission rod, and the hand wheel drives the valve to open and close through the transmission rod.

8. The polymer material glass transition temperature pretreatment equipment according to claim 1, characterized in that: The side wall of the quenching chamber is provided with heat dissipation holes.

Images