A heat flow differential scanning calorimeter with an auxiliary heating cover

Abstract

The utility model provides a kind of auxiliary heating's heat flow differential scanning calorimeter automatic opening and closing heating furnace cover, including furnace cover, the furnace cover is engaged with the sample furnace in heat flow differential scanning calorimeter inside;The furnace cover includes shell, the inside fixed connection fixed link of shell, the fixed link's bottom end fixed connection fixed net, and fixed connection between the fixed net and heat insulation pad;Multiple groups of electric heating coil are symmetrically installed in the inside of heat insulation pad, and the surface of heat flow differential scanning calorimeter is contacted by heat insulation pad;The inner cover engages the inside wall of sample furnace, and the outer cover engages the outside wall of sample furnace;The top end of air pipe is installed fixed head that bottom end is tapered, and the inside of fixed sleeve is connected with fixed head slidingly.The utility model provides auxiliary heating's heat flow differential scanning calorimeter automatic opening and closing heating furnace cover has the advantages that furnace cover is easily opened, and furnace cover is easily positioned.

Description

Technical Field

[0001] This utility model relates to the field of heat flow differential scanning calorimeter technology, and in particular to an automatic opening and closing heating furnace lid for a heat flow differential scanning calorimeter with auxiliary heating. Background Technology

[0002] A heat flow differential scanning calorimeter (CSC) is a conventional thermal analysis instrument that measures the change in heat flow difference (or power difference) between a sample and a reference sample per unit time under programmed temperature control. It can measure fundamental data such as specific heat, glass transition temperature, melting point, enthalpy of fusion, heat of reaction of thermosetting plastics, reaction kinetics of thermosetting plastics, and gelation conversion rate. It is widely used in thermodynamic and kinetic research in fields such as polymer materials, biomedicine, inorganic non-metallic materials, petroleum, metallic materials, energetic materials, and the food industry.

[0003] When performing thermal analysis on samples using a thermal flow differential scanning calorimeter, the samples are stored inside the sample furnace. To ensure the accuracy of the detection results, the top of the sample furnace needs to be sealed with a furnace lid. When the temperature inside the sample furnace drops below zero, the water vapor around the furnace lid will condense into ice at the contact point between the furnace lid and the thermal flow differential scanning calorimeter, making it difficult to open the furnace lid and inconvenient to add other experimental substances to the sample furnace.

[0004] Therefore, it is necessary to provide a new type of heat flow differential scanning calorimeter with auxiliary heating and automatic opening and closing of the heating furnace cover to solve the above problems. Utility Model Content

[0005] The technical problem solved by this utility model is to provide an automatic opening and closing heating furnace lid for a heat flow differential scanning calorimeter that can be used for auxiliary heating, making it easy to open and position the furnace lid.

[0006] To solve the above-mentioned technical problems, the present invention provides an automatic opening and closing heating furnace cover for a heat flow differential scanning calorimeter with auxiliary heating, comprising: a furnace cover that engages with a sample furnace inside the heat flow differential scanning calorimeter, and a moving mechanism for driving the fixed shell and furnace cover to move on one side of the heat flow differential scanning calorimeter; the furnace cover includes an outer shell, a fixed rod fixedly connected inside the outer shell, a fixed mesh fixedly connected to the bottom end of the fixed rod, and a fixed connection between the fixed mesh and a heat insulation pad; multiple sets of heating coils are symmetrically installed inside the heat insulation pad, and the heat insulation pad abuts against the surface of the heat flow differential scanning calorimeter; a vent pipe is slidably connected inside the fixed rod, an inner cover and an outer cover are fixedly connected to the bottom end of the vent pipe, the inner cover engages with the inner side wall of the sample furnace, and the outer cover engages with the outer side wall of the sample furnace; a fixed head with a conical bottom end is installed at the top end of the vent pipe, a fixed sleeve with an internal funnel shape is installed inside the fixed shell, and the fixed head is slidably connected inside the fixed sleeve.

[0007] Preferably, the moving mechanism includes a base, and two bases are provided on one side of the heat flow differential scanning calorimeter. A stepper motor and a guide rod are mounted on the surface of the base. The output shaft of the stepper motor is connected to a screw, and the two screws are threadedly connected to a first fixed sleeve and a second fixed sleeve. One of the bases is fixedly connected to the first fixed sleeve, and the second fixed sleeve is fixed to the surface of the fixed shell. The first fixed sleeve and the second fixed sleeve are slidably connected to the two guide rods respectively.

[0008] Preferably, the heat flow differential scanning calorimeter has an inflation tube installed on its side wall, and the inflation tube is connected to the sample furnace.

[0009] Preferably, the fixing head is slidably connected to the inside of the fixing shell, and the air outlet of the vent pipe is located inside the fixing shell.

[0010] Preferably, multiple sliding rods are installed at the top of the outer shell, and the sliding rods with "T"-shaped sidewalls are slidably connected to the fixed shell and the fixed sleeve.

[0011] Preferably, the bottom surface of the heat insulation pad has a groove in the center, and the inner cover and the outer cover are slidably connected inside the groove.

[0012] Preferably, the inner diameter of the groove is larger than the diameter of the outer cover, and the diameter of the through hole on the surface of the fixing mesh is larger than the diameter of the vent pipe.

[0013] Compared with related technologies, the automatic opening and closing of the heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating provided by this utility model has the following beneficial effects: This utility model provides an automatic opening and closing heating furnace lid for a heat flow differential scanning calorimeter with auxiliary heating. When the furnace lid needs to be engaged with the sample furnace, gravity causes the fixing head to engage with the fixing sleeve. The outer cover and the inner cover extend from the groove. When the inner cover contacts the sample furnace but is not aligned, the inner cover contacts the top surface of the sample furnace, and the fixing head pushes upward from inside the fixing sleeve, with a certain gap between them. As the moving mechanism drives the furnace lid to continue moving, the inner cover moves to the top of the sample furnace. When the inner cover is aligned with the sample furnace, gravity causes the inner cover to engage with the inner wall of the sample furnace, and the outer cover engages with the outer wall of the sample furnace, thus completing the splicing. The moving mechanism continues to drive the furnace lid... As the furnace lid moves downwards, the heat insulation pad contacts the surface of the heat flow differential scanning calorimeter. This downward movement also presses against the outer and inner covers, ensuring they fit tightly against the inner and outer walls of the sample furnace. The heat insulation pad, outer cover, and inner cover provide a triple seal, increasing the furnace's internal airtightness and reducing external environmental interference, thus facilitating sample testing. When the sample furnace is below freezing and needs to be opened, the heating coil inside the heat insulation pad is activated. The heating coil generates heat, rapidly increasing the temperature between the heat insulation pad and the heat flow differential scanning calorimeter, melting the ice layer between them quickly. This allows the heat insulation pad to be lifted upwards, opening the sample furnace. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the automatic opening and closing heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating provided by this utility model; Figure 2 for Figure 1 The diagram shows the internal structure of the furnace cover. Figure 3 for Figure 1 The diagram shows the structure of the furnace cover. Figure 4 for Figure 2 The diagram shows the internal structure of the outer shell.

[0015] The following are the labels in the diagram: 1. Heat flow differential scanning calorimeter; 11. Gas filling tube; 12. Sample furnace; 2. Moving mechanism; 21. Base; 22. Stepper motor; 23. Screw; 24. Guide rod; 25. First fixing sleeve; 26. Second fixing sleeve; 3. Fixing shell; 4. Furnace cover; 41. Outer shell; 42. Inner cover; 43. Outer cover; 44. Vent pipe; 45. Fixing rod; 46. Fixing mesh; 47. Heat insulation pad; 48. Fixing sleeve; 49. Fixing head; 410. Heating coil; 411. Groove; 412. Slide rod. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please see Figures 1 to 4 , Figure 1 A schematic diagram of a preferred embodiment of the automatic opening and closing heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating provided by this utility model; Figure 2 for Figure 1 The diagram shows the internal structure of the furnace cover. Figure 3 for Figure 1 The diagram shows the structure of the furnace cover. Figure 4 for Figure 2The diagram shows the internal structure of the outer casing. An automatically opening and closing heating furnace cover for a heat flow differential scanning calorimeter (HCSC) with auxiliary heating includes a furnace cover 4. The furnace cover 4 engages with the sample furnace 12 inside the HCSC 1. A moving mechanism 2 for moving the fixed shell 3 and the furnace cover 4 is installed on one side of the HCSC 1. The moving mechanism 2 includes a base 21. Two bases 21 are provided on one side of the HCSC 1. A stepper motor 22 and a guide rod 24 are mounted on the surface of each base 21. The output shaft of the stepper motor 22 is connected to a screw 23. The two screws 23 are threadedly connected to a first fixed sleeve 25 and a second fixed sleeve 26. One of the bases 21 is fixedly connected to the first fixed sleeve 25, and the second fixed sleeve 26 is fixed to the surface of the fixed shell 3. The first fixed sleeve 25 and the second fixed sleeve 26 are respectively connected to two... The guide rods 24 are slidably connected. When the stepper motor 22 corresponding to the first fixed sleeve 25 operates, it drives the screw 23 to rotate. Utilizing the principle of screw transmission, the screw 23 drives the first fixed sleeve 25, the second fixed sleeve 26, the fixed shell 3, and the furnace cover 4 to move up and down. When the furnace cover 4 moves left and right, the stepper motor 22 corresponding to the second fixed sleeve 26 operates, driving the screw 23 to rotate. Utilizing the principle of screw transmission, it drives the second fixed sleeve 26, the fixed shell 3, and the furnace cover 4 to move left and right, thereby controlling the direction of the stepper motor 22 and controlling the up-down and left-right movement of the furnace cover 4. When the furnace cover 4 moves, the fixed sleeve moves linearly along the guide rods 24 to ensure that the furnace cover 4 also moves linearly, preventing the position of the furnace cover 4 from shifting during movement.

[0018] The furnace cover 4 includes an outer shell 41, with a fixing rod 45 fixedly connected inside the outer shell 41. A fixing mesh 46 is fixedly connected to the bottom end of the fixing rod 45. The fixing mesh 46 is fixedly connected to a heat insulation pad 47, pressing the heat insulation pad 47 to ensure uniform force distribution on its surface and increase the seal between the heat insulation pad 47 and the heat flow differential scanning calorimeter 1. Multiple sets of electric heating coils 410 are symmetrically installed inside the heat insulation pad 47, and the heat insulation pad 47 abuts against the... The surface of the heat flow differential scanning calorimeter 1; the vent pipe 44 is slidably connected inside the fixed rod 45, the bottom end of the vent pipe 44 is fixedly connected to the inner cover 42 and the outer cover 43, the inner cover 42 is engaged with the inner side wall of the sample furnace 12, and the outer cover 43 is engaged with the outer side wall of the sample furnace 12; a fixed head 49 with a conical bottom end is installed at the top end of the vent pipe 44, and a fixed sleeve 48 with an internal funnel shape is installed inside the fixed shell 3, and the fixed head 49 is slidably connected inside the fixed sleeve 48. When the furnace cover 4 needs to be engaged with the sample furnace 12, the fixing head 49 engages with the fixing sleeve 48 under the action of gravity. The outer cover 43 and the inner cover 42 extend from the inside of the groove 411. When the inner cover 42 contacts the sample furnace 1 but is not aligned, the inner cover 42 contacts the top surface of the sample furnace 12. The fixing head 48 pushes upward from the inside of the fixing sleeve 48, creating a certain gap between the two. When the moving mechanism 2 drives the furnace cover 4 to continue moving, the inner cover 42 moves at the top of the sample furnace 1. When the inner cover 42 is aligned with the sample furnace 12, under the action of gravity, the inner cover 42 engages with the inner wall of the sample furnace 1, and the outer cover 43 engages with the outer wall of the sample furnace 1, allowing the two to be quickly joined. The moving mechanism 2 continues to drive the furnace cover 4 to move downward, and the heat insulation pad 47 abuts against the... The heat insulation pad 47 moves downward to press the outer cover 43 and the inner cover 42, so that the inner cover 42 and the outer cover 43 are tightly attached to the inner and outer walls of the sample furnace 12. The heat insulation pad 47, the outer cover 43, and the inner cover 42 provide triple sealing for the interior of the sample furnace 12, increasing the airtightness of the sample furnace 12 and reducing the interference of the external environment on the interior of the sample furnace 12, which facilitates the detection of samples in the sample furnace 12. When the interior of the sample furnace 12 is in a sub-zero state and it is necessary to open the sample furnace 12, the heating coil 410 inside the heat insulation pad 47 is turned on. The heating coil 410 heats up, causing the temperature between the heat insulation pad 47 and the heat flow differential scanning calorimeter 1 to rise rapidly, and the ice layer between them melts quickly, making it easy to lift the heat insulation pad 47 upward to open the sample furnace 12.

[0019] The heat flow differential scanning calorimeter 1 has an inflation tube 11 installed on its side wall, and the inflation tube 11 is connected to the sample furnace 12. This is to facilitate the injection of protective gas into the sample furnace 1 through the inflation tube 11, thereby improving the accuracy of sample detection.

[0020] The fixing head 49 is slidably connected to the interior of the fixing shell 3, and the outlet of the vent pipe 44 is located inside the fixing shell 3. This allows the vent pipe 44 to be easily connected to external pipes inside the fixing shell 3, enabling the protective gas inside the sample furnace 1 to be discharged through the vent pipe 44.

[0021] Multiple sliding rods 412 are installed at the top of the outer shell 41. The sliding rods 412 with "T"-shaped sidewalls are slidably connected to the fixed shell 3 and the fixed sleeve 48. When the fixed shell 3 and the outer shell 41 approach each other, the sliding rods 412 move linearly inside the fixed shell 3 to guide the outer shell 41 and make the outer shell 41 move linearly.

[0022] The heat insulation pad 47 has a groove 411 at the center of its bottom surface. The inner cover 42 and the outer cover 43 are slidably connected inside the groove 411. To facilitate the outer cover 43 entering the groove 411, the heat insulation pad 47 presses the outer cover 43 downward. The inner diameter of the groove 411 is larger than the diameter of the outer cover 43, and the diameter of the through hole on the surface of the fixing mesh 46 is larger than the diameter of the vent pipe 44. To facilitate the slight movement of the inner cover 42 and the outer cover 43, which drive the vent pipe 44, inside the fixing mesh 46 and the fixing rod 45, it is beneficial for the inner cover 42 to be aligned with the sample furnace 12.

[0023] The operating principle of the automatic opening and closing heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating provided by this utility model is as follows: When the device is connected to an external power source, and the furnace lid 4 needs to engage with the sample furnace 12, the stepper motor 22 is activated, driving the fixed shell 3 and the furnace lid 4 to move up, down, left, and right. When the inner cover 42 contacts the sample furnace 1 but is not aligned, the inner cover 42 contacts the top surface of the sample furnace 12, and the fixing head 48 pushes upward from inside the fixing sleeve 48, creating a certain gap between them. As the moving mechanism 2 drives the furnace lid 4 to continue moving, the inner cover 42 moves to the top of the sample furnace 1. When the inner cover 42 aligns with the sample furnace 12, under the action of gravity, the inner cover 42 moves towards and engages with the inner wall of the sample furnace 1, and the outer cover 43 engages with the sample furnace 4. The outer wall of 1 allows for rapid splicing of the two components; the moving mechanism 2 continues to drive the furnace cover 4 downward, the heat insulation pad 47 abuts against the surface of the heat flow differential scanning calorimeter 1, and as the moving mechanism 2 drives the fixed shell 3 to continue downward, the fixed shell 3 and the outer shell 41 gradually approach each other, the slide rod 412 moves linearly inside the fixed shell 3, guiding the fixed shell 3 so that the fixing sleeve 48 presses the outer shell 41 downward, and the outer shell 41 passes through the fixing rod 45 and the fixing mesh 46. The heat insulation pad 47 is pressed downwards, causing it to press down on the outer cover 43 and the inner cover 42. This ensures that the inner cover 42 and the outer cover 43 tightly adhere to the inner and outer walls of the sample furnace 12. The heat insulation pad 47, the outer cover 43, and the inner cover 42 provide a triple seal for the interior of the sample furnace 12, increasing its airtightness and reducing interference from the external environment. This facilitates sample testing within the sample furnace 12. When the interior of the sample furnace 12 is below freezing... When the sample furnace 12 needs to be opened, the heating coil 410 inside the heat insulation pad 47 is turned on. The heating coil 410 heats up, causing the temperature between the heat insulation pad 47 and the heat flow differential scanning calorimeter 1 to rise rapidly. The ice layer between them melts quickly. When the fixed shell 3 and the furnace cover 4 move upward, the furnace cover 4 pulls the heat insulation pad 47 away from the heat flow differential scanning calorimeter 1, and then pulls the outer cover 43 and the inner cover 42 away from the sample furnace 12. The sample furnace 12 is opened slowly layer by layer.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An automatic opening and closing heating furnace lid for a heat flow differential scanning calorimeter with auxiliary heating, characterized in that, include: The furnace cover (4) engages with the sample furnace (12) inside the heat flow differential scanning calorimeter (1), and a moving mechanism (2) is installed on one side of the heat flow differential scanning calorimeter (1) to drive the fixed shell (3) and the furnace cover (4) to move. The furnace cover (4) includes an outer shell (41), a fixing rod (45) is fixedly connected inside the outer shell (41), a fixing mesh (46) is fixedly connected to the bottom end of the fixing rod (45), and the fixing mesh (46) is fixedly connected to the heat insulation pad (47); multiple sets of electric heating coils (410) are symmetrically installed inside the heat insulation pad (47), and the heat insulation pad (47) abuts against the surface of the heat flow differential scanning calorimeter (1); a vent pipe is slidably connected inside the fixing rod (45). (44) The bottom end of the vent pipe (44) is fixedly connected to the inner cover (42) and the outer cover (43). The inner cover (42) engages with the inner side wall of the sample furnace (12), and the outer cover (43) engages with the outer side wall of the sample furnace (12). A fixed head (49) with a conical bottom end is installed at the top end of the vent pipe (44). A fixed sleeve (48) with a funnel-shaped interior is installed inside the fixed shell (3), and the fixed head (49) is slidably connected inside the fixed sleeve (48).

2. The automatic opening and closing of the heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating as described in claim 1, characterized in that, The moving mechanism (2) includes a base (21). Two bases (21) are provided on one side of the heat flow differential scanning calorimeter (1). A stepper motor (22) and a guide rod (24) are installed on the surface of the base (21). The output shaft of the stepper motor (22) is connected to a screw (23). The two screws (23) are threadedly connected to the first fixed sleeve (25) and the second fixed sleeve (26). One of the bases (21) is fixedly connected to the first fixed sleeve (25). The second fixed sleeve (26) is fixed to the surface of the fixed shell (3). The first fixed sleeve (25) and the second fixed sleeve (26) are slidably connected to the two guide rods (24) respectively.

3. The automatic opening and closing of the heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating as described in claim 1, characterized in that, The heat flow differential scanning calorimeter (1) has an inflation tube (11) installed on its side wall, and the inflation tube (11) is connected to the sample furnace (12).

4. The automatic opening and closing of the heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating as described in claim 1, characterized in that, The fixing head (49) is slidably connected to the inside of the fixing shell (3), and the air outlet of the vent pipe (44) is located inside the fixing shell (3).

5. The automatic opening and closing of the heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating according to claim 1, characterized in that, Multiple sliding rods (412) are installed at the top of the outer shell (41), and the sliding rods (412) with "T"-shaped sidewalls are slidably connected to the fixed shell (3) and the fixed sleeve (48).

6. The automatic opening and closing of the heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating according to claim 1, characterized in that, The heat insulation pad (47) has a groove (411) in the center of its bottom surface, and the inner cover (42) and the outer cover (43) are slidably connected inside the groove (411).

7. The automatic opening and closing of the heating furnace lid of the heat flow differential scanning calorimeter with auxiliary heating according to claim 6, characterized in that, The inner diameter of the groove (411) is larger than the diameter of the outer cover (43), and the diameter of the through hole on the surface of the fixing mesh (46) is larger than the diameter of the vent pipe (44).

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